WO2017113910A1 - Integrated chip for detecting blood oxygen saturation of human body - Google Patents

Integrated chip for detecting blood oxygen saturation of human body Download PDF

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Publication number
WO2017113910A1
WO2017113910A1 PCT/CN2016/100038 CN2016100038W WO2017113910A1 WO 2017113910 A1 WO2017113910 A1 WO 2017113910A1 CN 2016100038 W CN2016100038 W CN 2016100038W WO 2017113910 A1 WO2017113910 A1 WO 2017113910A1
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red
conversion circuit
infrared
analog
circuit
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PCT/CN2016/100038
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French (fr)
Chinese (zh)
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程亚宇
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深圳贝特莱电子科技股份有限公司
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Publication of WO2017113910A1 publication Critical patent/WO2017113910A1/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A61B5/14552Details of sensors specially adapted therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/72Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7203Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal

Definitions

  • the invention relates to a detecting device, in particular to an integrated chip for detecting blood oxygen saturation of a human body.
  • Mobile health, personal portable monitoring and medical care is one of the important components of China's future health care system. It is one of the important needs for the development of medical and health services in the future to be able to monitor the individual for a long time and to be able to discover the sudden illness or abnormal physiological condition of the ward.
  • the real-time and universality of this application requires the new monitoring system to be portable, miniaturized, integrated, and low-power.
  • the device for detecting blood oxygen saturation mostly uses a separate circuit board level circuit, and the light change received through transmission or reflection is converted into an electrical pulse signal, and processed by a current voltage conversion circuit, an amplifying circuit, and a low pass filter circuit to obtain a volume pulse.
  • the wave signal is obtained by algorithmically processing the two volume pulse waves to obtain the blood oxygen saturation value; the analog circuit of the method is complicated, and the board-level occupied area is large, which is inconvenient for miniaturization and integration of the device.
  • There is also a digital blood oxygen saturation measurement method which uses an optical-frequency conversion method to convert an received optical signal into an electrical pulse signal whose frequency is proportional to the light intensity, and performs a frequency technique on the pulse signal.
  • Digital signal processing is performed to obtain human blood oxygen saturation value; however, the currently available optical-to-frequency converter has a frequency range below 1 MHz. To achieve the required resolution of the frequency technology, it is necessary to automatically adjust the driving current of the light-emitting tube so that the driving current is automatically adjusted.
  • the output pulse of the optical-to-frequency converter has sufficient pulse width to maintain the accuracy of the period measurement, but to achieve this, the drive current and the intensity of the light pulse are adjusted very much when the thickness of the tissue is thin. Small, will lead to a serious reduction in signal to noise ratio.
  • the present invention provides an integrated chip for detecting blood oxygen saturation of a human body.
  • the invention provides an integrated chip for detecting blood oxygen saturation of a human body, comprising a red light diode driving circuit, a red photoelectric converter, a first current voltage conversion circuit, an infrared light diode driving circuit, an infrared photoelectric converter, and a second a current-voltage conversion circuit, an analog-to-digital conversion circuit, and a digital signal processing circuit, wherein the red diode driving circuit is connected with a red light diode, and an output end of the red photoelectric converter is connected to the first current voltage conversion circuit
  • the output end of the first current-voltage conversion circuit is connected to the analog-to-digital conversion circuit
  • the infrared photodiode driving circuit is connected with an infrared photodiode, and an output end of the infrared photo-electrical converter and the second current a voltage conversion circuit is connected, an output end of the second current voltage conversion circuit and the modulus a conversion circuit connection, an output of the analog to digital conversion circuit is coupled to the digital signal processing circuit
  • the red light and the infrared light are transmitted or reflected by the human skin, they are respectively received by the red photoelectric converter and the infrared photoelectric converter and converted into a current signal, and then passed through the first current.
  • the voltage conversion circuit and the second current voltage conversion circuit obtain a voltage signal, and the obtained voltage signal is quantized by an analog to digital converter.
  • the digital signal processing circuit is connected to an output interface.
  • the output interface is an IIC digital interface.
  • the output interface is an SPI interface.
  • the output interface is a UART interface.
  • the invention also provides an integrated chip for detecting human blood oxygen saturation, comprising a red light diode driving circuit, a red light photoelectric converter, an infrared light diode driving circuit, an infrared light photoelectric converter, an analog to digital conversion circuit and digital signal processing.
  • a circuit wherein the red light diode driving circuit is connected with a red light diode, an output end of the red light photoelectric converter is connected to the analog to digital conversion circuit, and the infrared light emitting diode driving circuit is connected with an infrared light diode.
  • An output end of the infrared photoelectric converter is connected to the analog to digital conversion circuit, an output end of the analog to digital conversion circuit is connected to the digital signal processing circuit, and the red LED driving circuit drives the red LED to generate Red light, the infrared light diode driving circuit drives the infrared light diode to generate infrared light, and the red light and the infrared light are transmitted or reflected by the skin of the human body, respectively, by a red photoelectric converter and an infrared light photoelectric
  • the converter accepts and directly converts to a voltage signal, and the obtained voltage signal is obtained through an analog-to-digital converter Of.
  • the invention also provides an integrated chip for detecting human blood oxygen saturation, comprising a red light diode driving circuit, a red light photoelectric converter, an infrared light diode driving circuit, an infrared light photoelectric converter, an analog to digital conversion circuit and digital signal processing.
  • a circuit wherein the red light diode driving circuit is connected with a red light diode, an output end of the red light photoelectric converter is connected to the analog to digital conversion circuit, and the infrared light emitting diode driving circuit is connected with an infrared light diode.
  • An output end of the infrared optical-to-electrical converter is connected to the analog-to-digital conversion circuit, an output end of the analog-to-digital conversion circuit is connected to the digital signal processing circuit, and the analog-to-digital converter is a current-mode analog-to-digital converter.
  • the red light emitting diode driving circuit drives the red light diode to generate red light
  • the infrared light emitting diode driving circuit drives the infrared light diode to generate infrared light
  • the red light and the infrared light are transmitted or reflected in the skin of the human body. After the action, they are respectively accepted by the red photoelectric converter and the infrared photoelectric converter and directly converted into a current signal.
  • ADC by a current, the resulting electric Pressure signal quantization
  • the beneficial effects of the present invention are: by the above scheme, the application circuit is simplified, the device for measuring human blood oxygen saturation is greatly miniaturized, and the cost is reduced.
  • FIG. 1 is a schematic view of an integrated chip for detecting blood oxygen saturation of a human body according to the present invention.
  • an integrated chip for detecting blood oxygen saturation of a human body includes a red light diode driving circuit 1, a red light photoelectric converter 2, a first current voltage converting circuit 3, an infrared light diode driving circuit 4, and infrared light.
  • the output end is connected to the first current voltage conversion circuit 3, the output end of the first current voltage conversion circuit 3 is connected to the analog to digital conversion circuit 7, and the infrared photodiode driving circuit 4 is connected with an infrared photodiode.
  • An output end of the infrared optical to optical converter 5 is connected to the second current voltage conversion circuit 6, and an output end of the second current voltage conversion circuit 6 is connected to the analog to digital conversion circuit 7, the analog to digital conversion
  • An output end of the circuit 7 is connected to the digital signal processing circuit 8, and the red light emitting diode driving circuit 1 drives the red light diode to generate red light, and the infrared light emitting diode driving circuit 4
  • the infrared light diode generates infrared light, and the red light and the infrared light are respectively transmitted by the red light photoelectric converter 2 and the infrared light photoelectric converter 5 and converted into a current signal after being transmitted or reflected by the human skin.
  • the first current voltage conversion circuit 3 and the second current voltage conversion circuit 6 obtain a voltage signal, and the obtained voltage signal is quantized by the analog-to-digital converter 7, and a specific processing algorithm is used to obtain a human blood oxygen saturation value. .
  • the digital signal processing circuit 8 is connected to an output interface 9.
  • the output interface 9 is preferably an IIC digital interface.
  • the output interface 9 is preferably an SPI interface.
  • the output interface 9 is preferably a UART interface.
  • the first current voltage conversion circuit 3 and the second current voltage conversion circuit 6 may not be provided, and are directly converted into a voltage signal by the red photoelectric converter 2 and the infrared photoelectric converter 5, specifically: detecting a human blood oxygen saturation Integrated chip, including red diode driving circuit 1, red photoelectric converter 2, infrared photodiode driving circuit 4, infrared optical photoelectric converter 5, analog to digital conversion circuit 7 and a digital signal processing circuit 8, wherein the red diode driving circuit 1 is connected with a red light diode, and an output end of the red photoelectric converter 2 is connected to the analog to digital conversion circuit 7, the infrared light diode
  • the driving circuit 4 is connected with an infrared photodiode, an output end of the infrared optical to optical converter 5 is connected to the analog to digital conversion circuit 7, and an output end of the analog to digital conversion circuit 7 is connected to the digital signal processing circuit 8.
  • the red light emitting diode driving circuit 1 drives the red light emitting diode to generate red light
  • the infrared light emitting diode driving circuit 4 drives the infrared light emitting diode to generate infrared light
  • the red light and the infrared light are transmitted through the skin of the human body.
  • it is respectively received by the red photoelectric converter 2 and the infrared photoelectric converter 5 and directly converted into a voltage signal, and the obtained voltage signal is quantized by the analog-to-digital converter 7, and after a specific processing algorithm, Obtain human blood oxygen saturation value.
  • the first current voltage conversion circuit 3 and the second current voltage conversion circuit 6 may not be provided, and the red photoelectric converter 2 and the infrared photoelectric converter 5 are still converted into current signals, but the analog to digital conversion circuit 7 uses a current mode.
  • the conversion circuit is specifically: an integrated chip for detecting blood oxygen saturation of a human body, including a red light diode driving circuit 1, a red light photoelectric converter 2, an infrared light diode driving circuit 4, an infrared light photoelectric converter 5, and an analog to digital conversion a circuit 7 and a digital signal processing circuit 8, wherein the red diode driving circuit 1 is connected with a red light diode, and an output end of the red photoelectric converter 2 is connected to the analog to digital conversion circuit 7, the infrared light
  • the diode driving circuit 4 is connected with an infrared photodiode, an output end of the infrared optical to optical converter 5 is connected to the analog to digital conversion circuit 7, and an output end of the analog to digital conversion circuit 7 is connected to the digital signal processing
  • the analog-to-digital conversion circuit 7 employs a current-mode analog-to-digital conversion circuit, and the red-light diode driving circuit 1 drives the red-light diode to generate red light, and the infrared light-emitting diode drive The circuit 4 drives the infrared photodiode to generate infrared light. After the red light and the infrared light are transmitted or reflected by the skin of the human body, they are respectively accepted by the red photoelectric converter 2 and the infrared photoelectric converter 5 and directly converted into The circuit signal is quantized by a current-mode analog-to-digital conversion circuit, and a human blood oxygen saturation value is obtained through a specific processing algorithm.
  • the invention provides an integrated chip for detecting blood oxygen saturation of human body, adopts an integrated circuit method to realize the function of detecting blood oxygen saturation of human body, and integrates red photoelectric converter 2 and infrared photoelectric converter 5, the first current The voltage conversion circuit 3, the second current voltage conversion circuit 6, the analog to digital conversion circuit 7, the red LED driving circuit 1, the infrared photodiode driving circuit 4, the digital signal processing circuit 8, and the output interface 9, greatly reducing the circuit
  • the area and power consumption make it easy to miniaturize the equipment, and at the same time better balance the individual differences of the human body.
  • the invention provides an integrated chip for detecting blood oxygen saturation of a human body, which is different from the separation device.
  • the board-level circuit, the red-light photoelectric converter 2 and the infrared-light photoelectric converter 5 convert the light into an electrical signal, and directly convert it into a digital signal by a high-precision analog-to-digital conversion circuit 7, thereby eliminating the conventional amplification and filtering circuit.
  • the structure is simpler and the power consumption is lower; it is also different from the optical-frequency conversion method, and the high-precision analog-to-digital conversion circuit 7 is used to improve the signal range and the signal-to-noise ratio, taking into account the individual differences of the human body.
  • the invention provides an integrated chip for detecting blood oxygen saturation of human body, integrated photoelectric receiver, current voltage conversion circuit, high-precision digital-to-analog conversion circuit, digital signal processing circuit, realizes chip integration of detection circuit, and reaches heart rate meter device The requirement for miniaturization.

Abstract

An integrated chip for detecting the blood oxygen saturation of a human body comprises a red-light diode drive circuit (1), a red-light photoelectric transducer (2), a first current-voltage conversion circuit (3), an infrared-light diode drive circuit (4), an infrared-light photoelectric transducer (5), a second current-voltage conversion circuit (6), an analog-digital conversion circuit (7), and a digital signal processing circuit (8). A red-light diode is connected to the red-light diode drive circuit (1). An output end of the red-light photoelectric transducer (2) is connected to the first current-voltage conversion circuit (3). An output end of the first current-voltage conversion circuit (3) is connected to the analog-digital conversion circuit (7). An infrared-light diode is connected to the infrared-light diode drive circuit (4). An output end of the infrared-light photoelectric transducer (5) is connected to the second current-voltage conversion circuit (6). An output end of the analog-digital conversion circuit (7) is connected to the digital signal processing circuit (8). The integrated chip allows a human body blood oxygen saturation measurement device to be greatly miniaturized, and reduces costs.

Description

一种检测人体血氧饱和度的集成芯片Integrated chip for detecting blood oxygen saturation of human body 技术领域Technical field
本发明涉及检测装置,尤其涉及一种检测人体血氧饱和度的集成芯片。The invention relates to a detecting device, in particular to an integrated chip for detecting blood oxygen saturation of a human body.
背景技术Background technique
移动健康,个人便携式监护医疗是我国以后医疗卫生体系中的重要组成部分之一。能够连续长时间的监护个人,能够及时地发现被监护人的突发病情或不正常生理状况,将是以后医疗卫生服务发展的重要需求之一。这种应用的实时性和普适性要求这套新型监护系统需要具备便携化,小型化,集成化,低功耗的特点。Mobile health, personal portable monitoring and medical care is one of the important components of China's future health care system. It is one of the important needs for the development of medical and health services in the future to be able to monitor the individual for a long time and to be able to discover the sudden illness or abnormal physiological condition of the ward. The real-time and universality of this application requires the new monitoring system to be portable, miniaturized, integrated, and low-power.
目前检测血氧饱和度的设备多采用分离电路板级电路,通过透射或者反射接受到的光线变化转化为电脉冲信号,通过电流电压转换电路,放大电路,以及低通滤波电路进行处理得到容积脉搏波信号,通过对两路容积脉搏波进行算法处理得到血氧饱和度值;该方法模拟电路复杂,板级占用面积大,不便于设备的小型化集成化。还有数字式血氧饱和度测量方式,采用光-频率转换方法,利用光-频率转换器将接受到的光信号转换为频率与光强度成比例的电脉冲信号,对脉冲信号进行频率技术并进行数字信号处理,得到人体血氧饱和度值;但目前可用的光-频率转换器频率范围在1MHz以下,要让频率技术达到所要求的分辨率,就需要自动调节发光管的驱动电流,使对于任何厚度的人体组织,光-频率转换器输出脉冲都有足够的脉宽以保持周期测量的精度,但要做到这一点,当组织厚度较薄的时候驱动电流和光脉冲强度都会调到很小,会导致信噪比严重降低。At present, the device for detecting blood oxygen saturation mostly uses a separate circuit board level circuit, and the light change received through transmission or reflection is converted into an electrical pulse signal, and processed by a current voltage conversion circuit, an amplifying circuit, and a low pass filter circuit to obtain a volume pulse. The wave signal is obtained by algorithmically processing the two volume pulse waves to obtain the blood oxygen saturation value; the analog circuit of the method is complicated, and the board-level occupied area is large, which is inconvenient for miniaturization and integration of the device. There is also a digital blood oxygen saturation measurement method, which uses an optical-frequency conversion method to convert an received optical signal into an electrical pulse signal whose frequency is proportional to the light intensity, and performs a frequency technique on the pulse signal. Digital signal processing is performed to obtain human blood oxygen saturation value; however, the currently available optical-to-frequency converter has a frequency range below 1 MHz. To achieve the required resolution of the frequency technology, it is necessary to automatically adjust the driving current of the light-emitting tube so that the driving current is automatically adjusted. For human tissue of any thickness, the output pulse of the optical-to-frequency converter has sufficient pulse width to maintain the accuracy of the period measurement, but to achieve this, the drive current and the intensity of the light pulse are adjusted very much when the thickness of the tissue is thin. Small, will lead to a serious reduction in signal to noise ratio.
发明内容Summary of the invention
为了解决现有技术中的问题,本发明提供了一种检测人体血氧饱和度的集成芯片。In order to solve the problems in the prior art, the present invention provides an integrated chip for detecting blood oxygen saturation of a human body.
本发明提供了一种检测人体血氧饱和度的集成芯片,包括红光二极管驱动电路、红光光电转换器、第一电流电压转换电路、红外光二极管驱动电路、红外光光电转换器、第二电流电压转换电路、模数转换电路和数字信号处理电路,其中,所述红光二极管驱动电路连接有红光二极管,所述红光光电转换器的输出端与所述第一电流电压转换电路连接,所述第一电流电压转换电路的输出端与所述模数转换电路连接,所述红外光二极管驱动电路连接有红外光二极管,所述红外光光电转换器的输出端与所述第二电流电压转换电路连接,所述第二电流电压转换电路的输出端与所述模数 转换电路连接,所述模数转换电路的输出端与所述数字信号处理电路连接,所述红光二极管驱动电路驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器、红外光光电转换器接受并转换为电流信号,再经过第一电流电压转换电路、第二电流电压转换电路得到电压信号,通过模数转换器,将得到的电压信号量化。The invention provides an integrated chip for detecting blood oxygen saturation of a human body, comprising a red light diode driving circuit, a red photoelectric converter, a first current voltage conversion circuit, an infrared light diode driving circuit, an infrared photoelectric converter, and a second a current-voltage conversion circuit, an analog-to-digital conversion circuit, and a digital signal processing circuit, wherein the red diode driving circuit is connected with a red light diode, and an output end of the red photoelectric converter is connected to the first current voltage conversion circuit The output end of the first current-voltage conversion circuit is connected to the analog-to-digital conversion circuit, and the infrared photodiode driving circuit is connected with an infrared photodiode, and an output end of the infrared photo-electrical converter and the second current a voltage conversion circuit is connected, an output end of the second current voltage conversion circuit and the modulus a conversion circuit connection, an output of the analog to digital conversion circuit is coupled to the digital signal processing circuit, the red light emitting diode driving circuit drives the red light diode to generate red light, and the infrared light diode driving circuit drives the The infrared light diode generates infrared light. After the red light and the infrared light are transmitted or reflected by the human skin, they are respectively received by the red photoelectric converter and the infrared photoelectric converter and converted into a current signal, and then passed through the first current. The voltage conversion circuit and the second current voltage conversion circuit obtain a voltage signal, and the obtained voltage signal is quantized by an analog to digital converter.
作为本发明的进一步改进,所述数字信号处理电路连接有输出接口。As a further improvement of the present invention, the digital signal processing circuit is connected to an output interface.
作为本发明的进一步改进,所述输出接口为IIC数字接口。As a further improvement of the present invention, the output interface is an IIC digital interface.
作为本发明的进一步改进,所述输出接口为SPI接口。As a further improvement of the present invention, the output interface is an SPI interface.
作为本发明的进一步改进,所述输出接口为UART接口。As a further improvement of the present invention, the output interface is a UART interface.
本发明还提供了一种检测人体血氧饱和度的集成芯片,包括红光二极管驱动电路、红光光电转换器、红外光二极管驱动电路、红外光光电转换器、模数转换电路和数字信号处理电路,其中,所述红光二极管驱动电路连接有红光二极管,所述红光光电转换器的输出端与所述模数转换电路连接,所述红外光二极管驱动电路连接有红外光二极管,所述红外光光电转换器的输出端与所述模数转换电路连接,所述模数转换电路的输出端与所述数字信号处理电路连接,所述红光二极管驱动电路驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器、红外光光电转换器接受并直接转换为电压信号,通过模数转换器,将得到的电压信号量化。The invention also provides an integrated chip for detecting human blood oxygen saturation, comprising a red light diode driving circuit, a red light photoelectric converter, an infrared light diode driving circuit, an infrared light photoelectric converter, an analog to digital conversion circuit and digital signal processing. a circuit, wherein the red light diode driving circuit is connected with a red light diode, an output end of the red light photoelectric converter is connected to the analog to digital conversion circuit, and the infrared light emitting diode driving circuit is connected with an infrared light diode. An output end of the infrared photoelectric converter is connected to the analog to digital conversion circuit, an output end of the analog to digital conversion circuit is connected to the digital signal processing circuit, and the red LED driving circuit drives the red LED to generate Red light, the infrared light diode driving circuit drives the infrared light diode to generate infrared light, and the red light and the infrared light are transmitted or reflected by the skin of the human body, respectively, by a red photoelectric converter and an infrared light photoelectric The converter accepts and directly converts to a voltage signal, and the obtained voltage signal is obtained through an analog-to-digital converter Of.
本发明还提供了一种检测人体血氧饱和度的集成芯片,包括红光二极管驱动电路、红光光电转换器、红外光二极管驱动电路、红外光光电转换器、模数转换电路和数字信号处理电路,其中,所述红光二极管驱动电路连接有红光二极管,所述红光光电转换器的输出端与所述模数转换电路连接,所述红外光二极管驱动电路连接有红外光二极管,所述红外光光电转换器的输出端与所述模数转换电路连接,所述模数转换电路的输出端与所述数字信号处理电路连接,所述模数转换器为电流型模数转换器,所述红光二极管驱动电路驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器、红外光光电转换器接受并直接转换为电流信号,通过电流型模数转换器,将得到的电 压信号量化The invention also provides an integrated chip for detecting human blood oxygen saturation, comprising a red light diode driving circuit, a red light photoelectric converter, an infrared light diode driving circuit, an infrared light photoelectric converter, an analog to digital conversion circuit and digital signal processing. a circuit, wherein the red light diode driving circuit is connected with a red light diode, an output end of the red light photoelectric converter is connected to the analog to digital conversion circuit, and the infrared light emitting diode driving circuit is connected with an infrared light diode. An output end of the infrared optical-to-electrical converter is connected to the analog-to-digital conversion circuit, an output end of the analog-to-digital conversion circuit is connected to the digital signal processing circuit, and the analog-to-digital converter is a current-mode analog-to-digital converter. The red light emitting diode driving circuit drives the red light diode to generate red light, and the infrared light emitting diode driving circuit drives the infrared light diode to generate infrared light, and the red light and the infrared light are transmitted or reflected in the skin of the human body. After the action, they are respectively accepted by the red photoelectric converter and the infrared photoelectric converter and directly converted into a current signal. ADC by a current, the resulting electric Pressure signal quantization
本发明的有益效果是:通过上述方案,简化应用电路,使得测量人体血氧饱和度设备极大的小型化,并降低成本。The beneficial effects of the present invention are: by the above scheme, the application circuit is simplified, the device for measuring human blood oxygen saturation is greatly miniaturized, and the cost is reduced.
附图说明DRAWINGS
图1是本发明一种检测人体血氧饱和度的集成芯片的示意图。1 is a schematic view of an integrated chip for detecting blood oxygen saturation of a human body according to the present invention.
具体实施方式detailed description
下面结合附图说明及具体实施方式对本发明进一步说明。The invention will now be further described with reference to the drawings and specific embodiments.
实施例一 Embodiment 1
如图1所示,一种检测人体血氧饱和度的集成芯片,包括红光二极管驱动电路1、红光光电转换器2、第一电流电压转换电路3、红外光二极管驱动电路4、红外光光电转换器5、第二电流电压转换电路6、模数转换电路7和数字信号处理电路8,其中,所述红光二极管驱动电路1连接有红光二极管,所述红光光电转换器2的输出端与所述第一电流电压转换电路3连接,所述第一电流电压转换电路3的输出端与所述模数转换电路7连接,所述红外光二极管驱动电路4连接有红外光二极管,所述红外光光电转换器5的输出端与所述第二电流电压转换电路6连接,所述第二电流电压转换电路6的输出端与所述模数转换电路7连接,所述模数转换电路7的输出端与所述数字信号处理电路8连接,所述红光二极管驱动电路1驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路4驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器2、红外光光电转换器5接受并转换为电流信号,再经过第一电流电压转换电路3、第二电流电压转换电路6得到电压信号,通过模数转换器7,将得到的电压信号量化,经过特定的处理算法,即可得到人体血氧饱和度值。As shown in FIG. 1, an integrated chip for detecting blood oxygen saturation of a human body includes a red light diode driving circuit 1, a red light photoelectric converter 2, a first current voltage converting circuit 3, an infrared light diode driving circuit 4, and infrared light. a photoelectric converter 5, a second current-voltage conversion circuit 6, an analog-to-digital conversion circuit 7, and a digital signal processing circuit 8, wherein the red diode driving circuit 1 is connected with a red light diode, and the red photoelectric converter 2 The output end is connected to the first current voltage conversion circuit 3, the output end of the first current voltage conversion circuit 3 is connected to the analog to digital conversion circuit 7, and the infrared photodiode driving circuit 4 is connected with an infrared photodiode. An output end of the infrared optical to optical converter 5 is connected to the second current voltage conversion circuit 6, and an output end of the second current voltage conversion circuit 6 is connected to the analog to digital conversion circuit 7, the analog to digital conversion An output end of the circuit 7 is connected to the digital signal processing circuit 8, and the red light emitting diode driving circuit 1 drives the red light diode to generate red light, and the infrared light emitting diode driving circuit 4 The infrared light diode generates infrared light, and the red light and the infrared light are respectively transmitted by the red light photoelectric converter 2 and the infrared light photoelectric converter 5 and converted into a current signal after being transmitted or reflected by the human skin. Then, the first current voltage conversion circuit 3 and the second current voltage conversion circuit 6 obtain a voltage signal, and the obtained voltage signal is quantized by the analog-to-digital converter 7, and a specific processing algorithm is used to obtain a human blood oxygen saturation value. .
如图1所示,所述数字信号处理电路8连接有输出接口9。As shown in FIG. 1, the digital signal processing circuit 8 is connected to an output interface 9.
如图1所示,所述输出接口9优选为IIC数字接口。As shown in Figure 1, the output interface 9 is preferably an IIC digital interface.
如图1所示,所述输出接口9优选为SPI接口。As shown in Figure 1, the output interface 9 is preferably an SPI interface.
如图1所示,所述输出接口9优选为UART接口。As shown in Figure 1, the output interface 9 is preferably a UART interface.
实施例二 Embodiment 2
也可以不设置第一电流电压转换电路3、第二电流电压转换电路6,直接由红光光电转换器2、红外光光电转换器5转换为电压信号,具体为:一种检测人体血氧饱和度的集成芯片,包括红光二极管驱动电路1、红光光电转换器2、红外光二极管驱动电路4、红外光光电转换器5、模数转换电路 7和数字信号处理电路8,其中,所述红光二极管驱动电路1连接有红光二极管,所述红光光电转换器2的输出端与所述模数转换电路7连接,所述红外光二极管驱动电路4连接有红外光二极管,所述红外光光电转换器5的输出端与所述模数转换电路7连接,所述模数转换电路7的输出端与所述数字信号处理电路8连接,所述红光二极管驱动电路1驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路4驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器2、红外光光电转换器5接受并直接转换为电压信号,通过模数转换器7,将得到的电压信号量化,经过特定的处理算法,即可得到人体血氧饱和度值。The first current voltage conversion circuit 3 and the second current voltage conversion circuit 6 may not be provided, and are directly converted into a voltage signal by the red photoelectric converter 2 and the infrared photoelectric converter 5, specifically: detecting a human blood oxygen saturation Integrated chip, including red diode driving circuit 1, red photoelectric converter 2, infrared photodiode driving circuit 4, infrared optical photoelectric converter 5, analog to digital conversion circuit 7 and a digital signal processing circuit 8, wherein the red diode driving circuit 1 is connected with a red light diode, and an output end of the red photoelectric converter 2 is connected to the analog to digital conversion circuit 7, the infrared light diode The driving circuit 4 is connected with an infrared photodiode, an output end of the infrared optical to optical converter 5 is connected to the analog to digital conversion circuit 7, and an output end of the analog to digital conversion circuit 7 is connected to the digital signal processing circuit 8. The red light emitting diode driving circuit 1 drives the red light emitting diode to generate red light, and the infrared light emitting diode driving circuit 4 drives the infrared light emitting diode to generate infrared light, and the red light and the infrared light are transmitted through the skin of the human body. Or after the reflection, it is respectively received by the red photoelectric converter 2 and the infrared photoelectric converter 5 and directly converted into a voltage signal, and the obtained voltage signal is quantized by the analog-to-digital converter 7, and after a specific processing algorithm, Obtain human blood oxygen saturation value.
实施例三 Embodiment 3
也可以不设置第一电流电压转换电路3、第二电流电压转换电路6,红光光电转换器2、红外光光电转换器5仍然转换为电流信号,但模数转换电路7采用电流型模数转换电路,具体为:一种检测人体血氧饱和度的集成芯片,包括红光二极管驱动电路1、红光光电转换器2、红外光二极管驱动电路4、红外光光电转换器5、模数转换电路7和数字信号处理电路8,其中,所述红光二极管驱动电路1连接有红光二极管,所述红光光电转换器2的输出端与所述模数转换电路7连接,所述红外光二极管驱动电路4连接有红外光二极管,所述红外光光电转换器5的输出端与所述模数转换电路7连接,所述模数转换电路7的输出端与所述数字信号处理电路8连接,模数转换电路7采用电流型模数转换电路,所述红光二极管驱动电路1驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路4驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器2、红外光光电转换器5接受并直接转换为电路信号,通过电流型模数转换电路,将得到的电压信号量化,经过特定的处理算法,即可得到人体血氧饱和度值。The first current voltage conversion circuit 3 and the second current voltage conversion circuit 6 may not be provided, and the red photoelectric converter 2 and the infrared photoelectric converter 5 are still converted into current signals, but the analog to digital conversion circuit 7 uses a current mode. The conversion circuit is specifically: an integrated chip for detecting blood oxygen saturation of a human body, including a red light diode driving circuit 1, a red light photoelectric converter 2, an infrared light diode driving circuit 4, an infrared light photoelectric converter 5, and an analog to digital conversion a circuit 7 and a digital signal processing circuit 8, wherein the red diode driving circuit 1 is connected with a red light diode, and an output end of the red photoelectric converter 2 is connected to the analog to digital conversion circuit 7, the infrared light The diode driving circuit 4 is connected with an infrared photodiode, an output end of the infrared optical to optical converter 5 is connected to the analog to digital conversion circuit 7, and an output end of the analog to digital conversion circuit 7 is connected to the digital signal processing circuit 8. The analog-to-digital conversion circuit 7 employs a current-mode analog-to-digital conversion circuit, and the red-light diode driving circuit 1 drives the red-light diode to generate red light, and the infrared light-emitting diode drive The circuit 4 drives the infrared photodiode to generate infrared light. After the red light and the infrared light are transmitted or reflected by the skin of the human body, they are respectively accepted by the red photoelectric converter 2 and the infrared photoelectric converter 5 and directly converted into The circuit signal is quantized by a current-mode analog-to-digital conversion circuit, and a human blood oxygen saturation value is obtained through a specific processing algorithm.
本发明提供的一种检测人体血氧饱和度的集成芯片,采用集成电路方式,实现检测人体血氧饱和度的功能,通过集成红光光电转换器2及红外光光电转换器5、第一电流电压转换电路3、第二电流电压转换电路6、模数转换电路7,红光二极管驱动电路1、红外光二极管驱动电路4、数字信号处理电路8及输出接口9,极大的减小了电路面积和功耗,便于设备的小型化,同时较好的兼顾了人体个体差异性。The invention provides an integrated chip for detecting blood oxygen saturation of human body, adopts an integrated circuit method to realize the function of detecting blood oxygen saturation of human body, and integrates red photoelectric converter 2 and infrared photoelectric converter 5, the first current The voltage conversion circuit 3, the second current voltage conversion circuit 6, the analog to digital conversion circuit 7, the red LED driving circuit 1, the infrared photodiode driving circuit 4, the digital signal processing circuit 8, and the output interface 9, greatly reducing the circuit The area and power consumption make it easy to miniaturize the equipment, and at the same time better balance the individual differences of the human body.
本发明提供的一种检测人体血氧饱和度的集成芯片,有别于分离器件 板级电路,红光光电转换器2及红外光光电转换器5将光转为电信号后,直接由高精度的模数转换电路7转换为数字信号,摈弃了传统的放大和滤波电路,使得结构更简单,功耗更低;也有别于光-频率转换方式,利用高精度的模数转换电路7提高信号范围以及信噪比,兼顾人体的个体差异性。The invention provides an integrated chip for detecting blood oxygen saturation of a human body, which is different from the separation device. The board-level circuit, the red-light photoelectric converter 2 and the infrared-light photoelectric converter 5 convert the light into an electrical signal, and directly convert it into a digital signal by a high-precision analog-to-digital conversion circuit 7, thereby eliminating the conventional amplification and filtering circuit. The structure is simpler and the power consumption is lower; it is also different from the optical-frequency conversion method, and the high-precision analog-to-digital conversion circuit 7 is used to improve the signal range and the signal-to-noise ratio, taking into account the individual differences of the human body.
本发明提供的一种检测人体血氧饱和度的集成芯片,集成光电接受器,电流电压转换电路,高精度数模转换电路,数字信号处理电路,实现检测电路的芯片集成化,达到心率计设备可小型化的要求。The invention provides an integrated chip for detecting blood oxygen saturation of human body, integrated photoelectric receiver, current voltage conversion circuit, high-precision digital-to-analog conversion circuit, digital signal processing circuit, realizes chip integration of detection circuit, and reaches heart rate meter device The requirement for miniaturization.
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明,不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干简单推演或替换,都应当视为属于本发明的保护范围。 The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims (7)

  1. 一种检测人体血氧饱和度的集成芯片,其特征在于:包括红光二极管驱动电路、红光光电转换器、第一电流电压转换电路、红外光二极管驱动电路、红外光光电转换器、第二电流电压转换电路、模数转换电路和数字信号处理电路,其中,所述红光二极管驱动电路连接有红光二极管,所述红光光电转换器的输出端与所述第一电流电压转换电路连接,所述第一电流电压转换电路的输出端与所述模数转换电路连接,所述红外光二极管驱动电路连接有红外光二极管,所述红外光光电转换器的输出端与所述第二电流电压转换电路连接,所述第二电流电压转换电路的输出端与所述模数转换电路连接,所述模数转换电路的输出端与所述数字信号处理电路连接,所述红光二极管驱动电路驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器、红外光光电转换器接受并转换为电流信号,再经过第一电流电压转换电路、第二电流电压转换电路得到电压信号,通过模数转换器,将得到的电压信号量化。An integrated chip for detecting blood oxygen saturation of a human body, comprising: a red light diode driving circuit, a red photoelectric converter, a first current voltage conversion circuit, an infrared light diode driving circuit, an infrared light photoelectric converter, and a second a current-voltage conversion circuit, an analog-to-digital conversion circuit, and a digital signal processing circuit, wherein the red diode driving circuit is connected with a red light diode, and an output end of the red photoelectric converter is connected to the first current voltage conversion circuit The output end of the first current-voltage conversion circuit is connected to the analog-to-digital conversion circuit, and the infrared photodiode driving circuit is connected with an infrared photodiode, and an output end of the infrared photo-electrical converter and the second current a voltage conversion circuit is connected, an output end of the second current voltage conversion circuit is connected to the analog to digital conversion circuit, an output end of the analog to digital conversion circuit is connected to the digital signal processing circuit, and the red LED driving circuit is Driving the red light diode to generate red light, the infrared light diode driving circuit driving the infrared light The pole tube generates infrared light. After the red light and the infrared light are transmitted or reflected by the human skin, they are respectively received by the red photoelectric converter and the infrared photoelectric converter and converted into a current signal, and then passed through the first current voltage. The conversion circuit and the second current-voltage conversion circuit obtain a voltage signal, and the obtained voltage signal is quantized by an analog-to-digital converter.
  2. 根据权利要求1所述的检测人体血氧饱和度的集成芯片,其特征在于:所述数字信号处理电路连接有输出接口。The integrated chip for detecting blood oxygen saturation of a human body according to claim 1, wherein the digital signal processing circuit is connected to an output interface.
  3. 根据权利要求2所述的检测人体血氧饱和度的集成芯片,其特征在于:所述输出接口为IIC数字接口。The integrated chip for detecting blood oxygen saturation of a human body according to claim 2, wherein the output interface is an IIC digital interface.
  4. 根据权利要求2所述的检测人体血氧饱和度的集成芯片,其特征在于:所述输出接口为SPI接口。The integrated chip for detecting blood oxygen saturation of a human body according to claim 2, wherein the output interface is an SPI interface.
  5. 根据权利要求2所述的检测人体血氧饱和度的集成芯片,其特征在于:所述输出接口为UART接口。The integrated chip for detecting blood oxygen saturation of a human body according to claim 2, wherein the output interface is a UART interface.
  6. 一种检测人体血氧饱和度的集成芯片,其特征在于:包括红光二极管驱动电路、红光光电转换器、红外光二极管驱动电路、红外光光电转换器、模数转换电路和数字信号处理电路,其中,所述红光二极管驱动电路连接有红光二极管,所述红光光电转换器的输出端与所述模数转换电路连接,所述红外光二极管驱动电路连接有红外光二极管,所述红外光光电转换器的输出端与所述模数转换电路连接,所述模数转换电路的输出端与所述数字信号处理电路连接,所述红光二极管驱动电路驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路驱动所述红外光二极 管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器、红外光光电转换器接受并直接转换为电压信号,通过模数转换器,将得到的电压信号量化。An integrated chip for detecting blood oxygen saturation of a human body, comprising: a red light diode driving circuit, a red light photoelectric converter, an infrared light diode driving circuit, an infrared light photoelectric converter, an analog to digital conversion circuit and a digital signal processing circuit The red photodiode driving circuit is connected with a red photodiode, an output end of the red optical to optoelectronic converter is connected to the analog to digital conversion circuit, and the infrared photodiode driving circuit is connected with an infrared photodiode. An output end of the infrared optical-to-electrical converter is connected to the analog-to-digital conversion circuit, an output end of the analog-to-digital conversion circuit is connected to the digital signal processing circuit, and the red light-emitting diode driving circuit drives the red light-emitting diode to generate red Light ray, the infrared light diode driving circuit drives the infrared light diode The tube generates infrared light, and the red light and the infrared light are respectively transmitted by the red light photoelectric converter and the infrared light photoelectric converter after being transmitted or reflected by the human body, and are directly converted into a voltage signal, and passed through an analog-to-digital converter. The resulting voltage signal is quantized.
  7. 一种检测人体血氧饱和度的集成芯片,其特征在于:包括红光二极管驱动电路、红光光电转换器、红外光二极管驱动电路、红外光光电转换器、模数转换电路和数字信号处理电路,其中,所述红光二极管驱动电路连接有红光二极管,所述红光光电转换器的输出端与所述模数转换电路连接,所述红外光二极管驱动电路连接有红外光二极管,所述红外光光电转换器的输出端与所述模数转换电路连接,所述模数转换电路的输出端与所述数字信号处理电路连接,所述模数转换器为电流型模数转换器,所述红光二极管驱动电路驱动所述红光二极管产生红光光线,所述红外光二极管驱动电路驱动所述红外光二极管产生红外光光线,红光光线、红外光光线在人体的皮肤透射或者反射作用后,分别由红光光电转换器、红外光光电转换器接受并直接转换为电流信号,通过电流型模数转换器,将得到的电压信号量化。 An integrated chip for detecting blood oxygen saturation of a human body, comprising: a red light diode driving circuit, a red light photoelectric converter, an infrared light diode driving circuit, an infrared light photoelectric converter, an analog to digital conversion circuit and a digital signal processing circuit The red photodiode driving circuit is connected with a red photodiode, an output end of the red optical to optoelectronic converter is connected to the analog to digital conversion circuit, and the infrared photodiode driving circuit is connected with an infrared photodiode. An output end of the infrared optical-to-electrical converter is connected to the analog-to-digital conversion circuit, an output end of the analog-to-digital conversion circuit is connected to the digital signal processing circuit, and the analog-to-digital converter is a current-mode analog-to-digital converter. The red light diode driving circuit drives the red light diode to generate red light, and the infrared light diode driving circuit drives the infrared light diode to generate infrared light, and the red light and the infrared light are transmitted or reflected in the skin of the human body. After that, they are respectively accepted by a red photoelectric converter and an infrared photoelectric converter and directly converted into a current signal. ADC over-current, voltage signal obtained quantization.
PCT/CN2016/100038 2015-12-29 2016-09-25 Integrated chip for detecting blood oxygen saturation of human body WO2017113910A1 (en)

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