CN101839880A - Blood sugar testing device and internal code identification method thereof - Google Patents
Blood sugar testing device and internal code identification method thereof Download PDFInfo
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- CN101839880A CN101839880A CN201010166909A CN201010166909A CN101839880A CN 101839880 A CN101839880 A CN 101839880A CN 201010166909 A CN201010166909 A CN 201010166909A CN 201010166909 A CN201010166909 A CN 201010166909A CN 101839880 A CN101839880 A CN 101839880A
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Abstract
The invention relates to a blood sugar testing device and an internal code identification method thereof. The blood sugar testing device comprises a sensor, a signal processing unit, a detecting platform and blood sugar test paper, wherein the sensor is provided with a socket, the signal processing unit is connected with the socket of the sensor, the detecting platform is arranged by matching with the sensor, and the blood sugar test paper carries internal identification information. The sensor is provided with three conductive carbon layers in a matching mode, and the conductive carbon layers are respectively connected with resistors in series through probes of the socket of the sensor and then are connected to a power supply. The signal processing unit comprises a microcontroller and an internal code identification program stored in the microcontroller in advance, and the probes of the socket are respectively connected to the microcontroller. The invention combines the internal code and the sensor, thereby having simple structure and high identification accuracy, needing no manual adjustment or internal code confirmation of a user in measurement, reducing the chance of generating error by the user and saving the measuring time and steps. In addition, a negative feedback amplifying circuit is additionally arranged in a voltage source, and buffering is available between the voltage source and a load by utilizing the characteristic of an amplifier, thereby the stability of voltage at the sensor end is ensured.
Description
Technical field
The present invention relates to the Medical Instruments technical field, be specifically related to a kind of blood sugar testing device and internal code identification method thereof.
Background technology
The internal code identification method of blood glucose meter mainly contains 3 kinds at present:
1) method of this ISN identification is all adopted in user's manual setting, present most blood glucose meter, and this method has increased user's operational ton, and in use forgets easily and adjust ISN and cause the measurement result mistake;
2) identification automatically, the blood glucose meter of the superior series of Luo Shi adopts the method at present.Increase an external application chip, ISN is placed in the middle of the chip, chip of every bottle of strip collocation uses, and needs to confirm ISN in measuring process, and this method that adds chip has reduced user's operational ton, has reduced the chance that the user in use makes mistakes.But this chip and the blood glucose monitoring system separately method of packing are made mistakes in packaging process easily, and each user needs to confirm the accuracy of ISN;
3) only set an ISN.This method has only kyoto, Japan blood glucose meter GT-1641 type to possess at present.The method requires the strip linearity just the same, and it is poor to promote face.
At present the method for designing of blood glucose meter sensor electrical potential source is as follows: utilize stabilivolt to produce accurate voltage, utilize two resistance to carry out dividing potential drop again, with the ohmically voltage of an end closely source voltage as voltage source.Present most of blood glucose meter adopts this kind method for designing.The divider resistance of the voltage source inside that this method produces is not 0, so from the internal resistance of the input end voltage source of seeing over is the divider resistance of near end, the resistance of load is with the divider resistance parallel connection of near end in measuring process, thereby make the voltage above the divider resistance be lower than original voltage, different loads is all different to the influence of divider resistance, circuit is easy to generate shake like this, thereby influences test result.
Summary of the invention
At the above-mentioned problems in the prior art, the object of the invention is to provide a kind of blood sugar testing device, it has changed traditional internal code identification method, ISN and sensor are combined, simple in structure, the recognition accuracy height, make the user when measuring, not need manual setting or affirmation ISN, reduced the chance that the user produces in the measuring process mistake, Measuring Time and step have been saved, and increased a negative feedback amplifier circuit in the traditional electrical potential source, utilizing the characteristic of amplifier to make has a buffering between voltage source and the load, has guaranteed the stable of sensor side voltage.
Described blood sugar testing device, it is characterized in that comprising the sensor that has socket, the signal processing unit that is connected with sensor socket, and the detection platform and the blood sugar test paper that has internal code information that cooperate the sensor setting, described sensor is equipped with four conductive carbon layer, wherein an end of a conductive carbon layer links to each other with ground, the other end links to each other with all the other conductive carbon layer respectively, its excess-three bar conductive carbon layer is by the probe difference resistance in series R21 of sensor socket, R22, be connected to power supply behind the R23, described signal processing unit comprises microcontroller and is stored in the interior ISN recognizer of microcontroller in advance that the probe of the sensor socket is connected to the pin 80 on the microcontroller respectively, pin 81, pin 82.
Described blood sugar testing device is characterized in that described R21, R22, R23 are the resistance of 100K, and described power supply is the 3V voltage source.
Described blood sugar testing device is characterized in that described microcontroller is MSP430F437.
Described blood sugar testing device, the internal code information that it is characterized in that described blood sugar test paper is printed on the blood sugar test paper with the form of bar code.
Described blood sugar testing device, it is characterized in that described sensor is connected with voltage source circuit, comprise voltage generation circuit, operational amplifier, voltage generation circuit comprise stabilivolt W, the bleeder circuit in parallel with stabilivolt W, described bleeder circuit comprises three resistance R 1, R3 and the R2 that series connection is provided with, R3 place voltage output is linked into the anode input port of operational amplifier, the negative terminal of operational amplifier is linked to each other with output terminal, output voltage Vout inserts sensor.
Described blood sugar testing device, the voltage reference that it is characterized in that described stabilivolt W are 3026-(2.048V).
Described blood sugar testing device is characterized in that described R1, R2 are respectively the resistance of 220K, 36K, and R3 is the adjustable resistance of 0-2.2K.
Described blood sugar testing device is characterized in that described operational amplifier is ISL28213.
The internal code identification method of described blood sugar testing device, it is characterized in that the blood sugar test paper that will have internal code information places on the detection platform, utilize sensor that the internal code information on the blood sugar test paper is detected, three conductive carbon layer of sensor are produced respectively to be interrupted or nonbreaking state, produce a group identification code then, above-mentioned identification code is sent in the microcontroller, the ISN recognizer in the microcontroller calculates the generation ISN after reading identification code again.
The present invention compared with prior art has following beneficial effect:
With ISN with combine with sensor, the state of the conductive carbon layer in the sensor is represented with high level and low level, utilize the port of microcontroller that level is discerned again, can accurately judge the state of carbon-coating, to realize identification to the internal code information of blood sugar test paper, make the user when measuring, not need manual setting or affirmation ISN, reduced the chance that the user produces in the measuring process mistake, Measuring Time and step have been saved, it is simple in structure, the recognition accuracy height, and can not produce any negative effect to sensor.
2. in the traditional electrical potential source, increased a negative feedback amplifier circuit, utilize the characteristic of amplifier to make a buffering is arranged between voltage source and the load, guarantee the sensor side voltage accuracy height that voltage source circuit produces, be subjected to the influence of temperature and front-end circuit little, be easy to modulation.
Description of drawings
Fig. 1 is the theory diagram of interior code recognition device in the blood sugar testing device of the present invention;
Fig. 2 is the circuit theory diagrams of interior code recognition device in the blood sugar testing device of the present invention;
Fig. 3 is the voltage source theory diagram of blood sugar testing device sensor among the present invention;
Fig. 4 is the voltage source circuit schematic diagram of blood sugar testing device sensor among the present invention;
Fig. 5 is the circuit theory diagrams of blood sugar testing device of the present invention.
Embodiment
The invention will be further described below in conjunction with Figure of description:
It is as follows that blood sugar testing device of the present invention has proposed new internal code identification method:
1) internal code information is arranged on the blood sugar test paper;
2) on sensor, increase by 3 conductive carbon layer, utilize laser to interrupt this 3 conductive carbon layer respectively, can produce and interrupt and do not interrupt two states." interrupt " with " 0 " representative, " 1 " representative " does not interrupt ", and this is with forming (000～111) 8 group identification codes altogether altogether;
When 3) detecting, blood sugar test paper is placed on the detection platform, utilize sensor that the internal code information on the blood sugar test paper is detected, three conductive carbon layer of sensor are produced respectively to be interrupted or nonbreaking state, produce a group identification code then, again with in the above-mentioned identification code input microcontroller, read to calculate after the identification code by the ISN recognizer in the microcontroller and produce ISN.
As Fig. 1, shown in Figure 2, the present invention adopts the ISN automatic identification equipment of said method to comprise the sensor that has socket, the signal processing unit that is connected with sensor socket, and the detection platform and the blood sugar test paper that has internal code information that cooperate the sensor setting, described sensor is equipped with four conductive carbon layer, wherein an end of a conductive carbon layer links to each other with ground, the other end links to each other with all the other conductive carbon layer respectively, describedly comprise three resistance R 21, R22, R23, microcontroller and be stored in ISN recognizer in the microcontroller in advance, resistance R 21, R22, above-mentioned its excess-three bar conductive carbon layer of probe series connection that R23 is equipped with by sensor socket respectively, and connect the 3V voltage source, described probe more respectively with microcontroller on pin 80, pin 81, pin 82 connects.In the present embodiment, described R21, R22, R23 are the resistance of 100K, and described microcontroller is MSP430F437.
The ISN automatic identifying method of this example, sensor is used for the printing conductive carbon-coating, and resistance is used for R21, R22, R23 signal conversion voltage, and socket is used for input voltage for the customization socket, and microcontroller calculates ISN after voltage is discerned.Its concrete principle of work is as follows: carbon-coating is divided into 4 parts is printed on the sensor, one of them links to each other with ground as bus one end, and 3 parts of the other end and all the other link to each other, and its excess-three part links to each other with the 3V voltage source with resistance by the probe of socket.The place that carbon-coating is connected with resistance links to each other with 3 pins of microcontroller again.When carbon-coating does not interrupt input port be the voltage 0V of earth terminal, when carbon-coating interrupted, the voltage of input port was supply voltage 3V, utilized laser that the carbon-coating on the sensor is interrupted respectively, will produce 3 kinds of voltages on 3 pins of microcontroller.Utilize the program of microcontroller inside that the voltage on these 3 pins is read, 0V voltage is represented with digital " 0 ", 3V voltage is so always met the 8 kind of 2 system numerical value in generation " 000 "～" 111 " together with numeral " 1 " expression, and these 8 numerical value are just represented 8 interior code values.
As Fig. 3, Fig. 4, the invention allows for the design of sensor voltage source circuit: this voltage source circuit comprises voltage generation circuit and operational amplifier, voltage generation circuit comprises stabilivolt W, the bleeder circuit in parallel with stabilivolt W, described bleeder circuit comprises three resistance R 1, R3 and the R2 that series connection is provided with, R3 place voltage output is linked into the anode input port of operational amplifier, the negative terminal of operational amplifier is linked to each other with output terminal, output voltage Vout inserts sensor.In the present embodiment, the voltage reference of described stabilivolt W is 3026-(2.048V), and R1, R2 are respectively the resistance of 220K, 36K, and R3 is the adjustable resistance of 0-2.2K, and described operational amplifier is ISL28213.
In the voltage source device of this example, voltage reference 3026-(2.048V) is used to produce high precision low temperature and floats reference voltage, R1, R2 and R3 are used for dividing potential drop and produce 0.3V voltage, and ISL28213 is used to make the low input offset voltage and the high input impedance of negative feedback amplifier circuit.Its concrete course of work is as follows: 1) utilize the low temperature of 2% precision to float voltage reference generation 2.048V voltage, utilize 220K, 36K and 2.2K potentiometer generate the output of 0.3V voltage; 2) with the anode input port of 0.3V voltage input operational amplifier, the negative terminal of operational amplifier is linked to each other with output terminal, the output terminal of operational amplifier links to each other with 0.3V probe on the socket again.0.3V voltage is input to the reactive end of sensor.
The impedance operator of ideal operational amplificr is the input resistance infinity, and output resistance is 0.The anode of operational amplifier and negative terminal input voltage are equal, the negative terminal of operational amplifier are imported with output link to each other positive termination input voltage.So just formed an enlargement factor and be 1 negative feedback amplifier circuit, output voltage equals input voltage.Because the input impedance of input end is infinitely great, do not produce input current, so by stabilivolt 3026 and resistance 220K, the traditional circuit that 36K and potentiometer are formed can not produce power input to amplifier.Because the output resistance of output terminal is 0, amplifier self can not produce loading.So the 0.3V voltage that this voltage source produces can be approximately voltage source.
As Fig. 5, ISN identification circuit of the present invention and blood sugar test circuit share a microcontroller, are designs simplifications.
Two above-mentioned technical guarantee the accuracy of blood glucose monitoring system aspect blood glucose measurement and the convenience of operating aspect, compare compared to existing technology: 1) with ISN with combine with sensor, the state of the conductive carbon layer in the sensor is represented with high level and low level, the port of recycling microcontroller is identified level, can accurately judge the state of carbon-coating, to realize the identification to the internal code information of blood sugar test paper, make the user when measuring, not need manual setting or affirmation ISN, reduced the chance that the user produces in the measuring process mistake, Measuring Time and step have been saved, it is simple in structure, the recognition accuracy height, and can not produce any negative effect to sensor; 2) in the traditional electrical potential source, increased a negative feedback amplifier circuit, utilize the characteristic of amplifier to make a buffering is arranged between voltage source and the load, guarantee the sensor side voltage degree of accuracy height that voltage source circuit produces, be subjected to the impact of temperature and front-end circuit little, be easy to modulation.
Claims (9)
1. blood sugar testing device, it is characterized in that comprising the sensor that has socket, the signal processing unit that is connected with sensor socket, and the detection platform and the blood sugar test paper that has internal code information that cooperate the sensor setting, described sensor is equipped with four conductive carbon layer, wherein an end of a conductive carbon layer links to each other with ground, the other end links to each other with all the other conductive carbon layer respectively, its excess-three bar conductive carbon layer is by the probe difference resistance in series R21 of sensor socket, R22, be connected to power supply behind the R23, described signal processing unit comprises microcontroller and is stored in the interior ISN recognizer of microcontroller in advance that the probe of the sensor socket is connected to the pin 80 on the microcontroller respectively, pin 81, pin 82.
2. blood sugar testing device as claimed in claim 1 is characterized in that described R21, R22, R23 are the resistance of 100K, and described power supply is the 3V voltage source.
3. blood sugar testing device as claimed in claim 1 is characterized in that described microcontroller is MSP430F437.
4. blood sugar testing device as claimed in claim 1, the internal code information that it is characterized in that described blood sugar test paper is printed on the blood sugar test paper with the form of bar code.
5. blood sugar testing device as claimed in claim 1, it is characterized in that described sensor is connected with voltage source circuit, comprise voltage generation circuit, operational amplifier, voltage generation circuit comprise stabilivolt W, the bleeder circuit in parallel with stabilivolt W, described bleeder circuit comprises three resistance R 1, R3 and the R2 that series connection is provided with, R3 place voltage output is linked into the anode input port of operational amplifier, the negative terminal of operational amplifier is linked to each other with output terminal, output voltage Vout inserts sensor.
6. blood sugar testing device as claimed in claim 5, the voltage reference that it is characterized in that described stabilivolt W are 3026-(2.048V).
7. blood sugar testing device as claimed in claim 5 is characterized in that described R1, R2 are respectively the resistance of 220K, 36K, and R3 is the adjustable resistance of 0-2.2K.
8. blood sugar testing device as claimed in claim 5 is characterized in that described operational amplifier is ISL28213.
9. the internal code identification method of blood sugar testing device as claimed in claim 1, it is characterized in that the blood sugar test paper that will have internal code information places on the detection platform, utilize sensor that the internal code information on the blood sugar test paper is detected, three conductive carbon layer of sensor are produced respectively to be interrupted or nonbreaking state, produce a group identification code then, with in the above-mentioned identification code input microcontroller, the ISN recognizer in the microcontroller calculates the generation ISN after reading identification code again.
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| CN201010166909A CN101839880A (en) | 2010-05-07 | 2010-05-07 | Blood sugar testing device and internal code identification method thereof |
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| CN201010166909A CN101839880A (en) | 2010-05-07 | 2010-05-07 | Blood sugar testing device and internal code identification method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184313A (en) * | 2011-03-24 | 2011-09-14 | 武汉市思泰利医疗器械发展有限公司 | System and method for identifying multi-type blood glucose test strip |
| CN107290393A (en) * | 2017-07-31 | 2017-10-24 | 南京鱼跃软件技术有限公司 | A kind of recognition methods of automatic size adjusting |
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| US20060189895A1 (en) * | 2003-12-31 | 2006-08-24 | Neel Gary T | Test strip container with integrated meter having strip coding capability |
| US20090042306A1 (en) * | 2007-08-06 | 2009-02-12 | Reynolds Jeffery S | System and Method for Automatic Calibration |
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- 2010-05-07 CN CN201010166909A patent/CN101839880A/en active Pending
Patent Citations (3)
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| US5281395A (en) * | 1990-12-27 | 1994-01-25 | Boehringer Manheim Gmbh | Test carrier analysis system |
| US20060189895A1 (en) * | 2003-12-31 | 2006-08-24 | Neel Gary T | Test strip container with integrated meter having strip coding capability |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102184313A (en) * | 2011-03-24 | 2011-09-14 | 武汉市思泰利医疗器械发展有限公司 | System and method for identifying multi-type blood glucose test strip |
| CN102184313B (en) * | 2011-03-24 | 2013-06-05 | 武汉市思泰利医疗器械发展有限公司 | System and method for identifying multi-type blood glucose test strip |
| CN107290393A (en) * | 2017-07-31 | 2017-10-24 | 南京鱼跃软件技术有限公司 | A kind of recognition methods of automatic size adjusting |
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Application publication date: 20100922 |