CN102551881B - Output power monitoring circuit of high frequency electrotome - Google Patents
Output power monitoring circuit of high frequency electrotome Download PDFInfo
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- CN102551881B CN102551881B CN 201210045247 CN201210045247A CN102551881B CN 102551881 B CN102551881 B CN 102551881B CN 201210045247 CN201210045247 CN 201210045247 CN 201210045247 A CN201210045247 A CN 201210045247A CN 102551881 B CN102551881 B CN 102551881B
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Abstract
The invention relates to an output power monitoring circuit of a high frequency electrotome, which comprises a current sampling circuit and a voltage sampling circuit, wherein the input ends of the current sampling circuit and the voltage sampling circuit connected with a power output port of the high frequency electrotome, the output ends of the current sampling circuit and the voltage sampling circuit are connected with the input end of a computing circuit, and the output end of the computing circuit is connected with the input end of an analog-digital conversion circuit. The output power monitoring circuit provided in the invention is used for simultaneously sampling the current and the voltage via the current sampling circuit and the voltage sampling circuit, performing signal voltagecalculation, single current calculation and mixed calculation of voltage and current via the computing circuit, and monitoring the output power via multi-ply comparison. The output power monitoring circuit of high frequency electrotome of the invention can improve the output power monitoring accuracy and enhance the monitoring reliability.
Description
Technical field
The present invention relates to a kind of observation circuit, especially a kind of high frequency electric knife output observation circuit.
Background technology
At present, more single at the observation circuit of high frequency electric knife output, often be simple voltage sample or current sample, the computing of observation circuit is also fairly simple, makes that the accuracy rate that output is monitored is lower, poor reliability.
Summary of the invention
The object of the present invention is to provide a kind of high frequency electric knife output observation circuit that can improve monitoring precision, strengthen monitoring reliability.
For achieving the above object, the present invention has adopted following technical scheme: a kind of high frequency electric knife output observation circuit, comprise current sampling circuit and voltage sampling circuit, the input of the two all links to each other with the power take-off mouth of high frequency electric knife, the outfan of the two all links to each other with the input of computing circuit, and the outfan of computing circuit links to each other with the input of analog to digital conversion circuit.
As shown from the above technical solution, the present invention samples to electric current, voltage respectively simultaneously by current sampling circuit, voltage sampling circuit, and can carry out independent voltage operational, independent current operator by computing circuit, and the hybrid operation of voltage and current, through multiple relatively coming output is monitored.The present invention can improve the accuracy of output monitoring, strengthens the reliability of monitoring.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
The specific embodiment
A kind of high frequency electric knife output observation circuit, comprise current sampling circuit 1 and voltage sampling circuit 2, the input of the two all links to each other with the power take-off mouth of high frequency electric knife, the outfan of the two all links to each other with the input of computing circuit 3, the outfan of computing circuit 3 links to each other with the input of analog to digital conversion circuit 4, the output termination microcontroller MCU of analog to digital conversion circuit 4 judges computing and control by microcontroller MCU, as shown in Figure 1.Described analog to digital conversion circuit 4 adopts the MAX1247 chip, and the 2nd, 3,4 pins of MAX1247 chip all link to each other with the outfan of computing circuit 3.Analog to digital conversion circuit 4 is finished by the MAX1247 chip, realizes the A/D conversion, and wherein the 2nd of the MAX1247 chip the, 3,4 pins connect the 7th pin of amplifier U3B, the 7th pin of amplifier U5B, the 7th pin of amplifier U7B respectively.
The invention will be further described below in conjunction with Fig. 1.
Described current sampling circuit 1 comprises current transducer T1, its primary coil is serially connected with P1-1 and the P1-2 of the power take-off mouth of high frequency electric knife, its secondary coil links to each other with the end of adjustable resistance R1, the other end of adjustable resistance R1 links to each other with the normal phase input end of capacitor C 1, amplifier U1A respectively, the inverting input of amplifier U1A links to each other with the end of resistance R 2, R3 respectively, the outfan of the other end of resistance R 2, amplifier U1A all links to each other with the input of computing circuit 3, the other end ground connection of resistance R 3.Current transducer T1, resistance R 1, capacitor C 1 are formed the loop; the signal of coupling sampling can be exported different values then by regulating adjustable resistance R1; the 3rd pin by amplifier U1A amplifies; wherein the 1st pin of amplifier U1A is connected with capacitor C 2, C5; diode D1, D2 play holding circuit, when the electric current of sampling is excessive, shared by diode D1, D2, thus the protection back-end circuit; the characteristics of current sampling circuit 1 are that sampling is adjustable, and safety is controlled.
Described voltage sampling circuit 2 comprises voltage transmitter T2, its primary coil is connected to P2-1 and the P2-2 of the power take-off mouth of high frequency electric knife, its secondary coil links to each other with the end of adjustable resistance R18, the other end of adjustable resistance R18 links to each other with the normal phase input end of capacitor C 10, amplifier U1B respectively, the inverting input of amplifier U1B links to each other with an end of resistance R 19, and the outfan of the other end of resistance R 19, amplifier U1B all links to each other with the input of computing circuit 3.The characteristics of voltage sampling circuit 2 are identical with current sampling circuit 1, and the 7th pin of amplifier U1B links to each other with the 1st, 6 pins of capacitor C 6, chip U6.
Described computing circuit 3 comprises be used to the chip U2 that carries out current operator, the 1st of chip U2,6 pins link to each other with the outfan of current sampling circuit 1, the 2nd of chip U2,5,7 pin ground connection, the 12nd pin of chip U2 links to each other with the normal phase input end of amplifier U3B, the inverting input of amplifier U3B links to each other with adjustable resistance R9, the outfan of amplifier U3B links to each other with the input of analog to digital conversion circuit 4, the 4th pin of chip U2 links to each other with the inverting input of comparator U3A, the normal phase input end of comparator U3A links to each other with the normal phase input end of amplifier U3B, and the outfan of comparator U3A links to each other with the 3rd pin of chip U2.
Described computing circuit 3 comprises be used to carrying out voltage, the chip U4 of electric current hybrid operation, the 1st pin of chip U4 links to each other with the outfan of current sampling circuit 1, the 6th pin of chip U4 links to each other with the outfan of voltage sampling circuit 2, the 2nd of chip U4,5,7 pin ground connection, the 12nd pin of chip U4 links to each other with the normal phase input end of amplifier U5B, the inverting input of amplifier U5B links to each other with adjustable resistance R16, the outfan of amplifier U5B links to each other with the input of analog to digital conversion circuit 4, the 4th pin of chip U4 links to each other with the inverting input of comparator U5A, the normal phase input end of comparator U5A links to each other with the negative electrode of Zener diode Z1, the plus earth of Zener diode Z1.
Described computing circuit 3 comprises be used to the chip U6 that carries out voltage operational, the 1st of chip U6,6 pins link to each other with the outfan of voltage sampling circuit 2, the 2nd of chip U6,5,7 pin ground connection, the 12nd pin of chip U6 links to each other with the normal phase input end of amplifier U7B, the inverting input of amplifier U7B links to each other with the outfan of amplifier U7B, the outfan of amplifier U7B links to each other with adjustable resistance R24 by resistance R 23, adjustable resistance R24 links to each other with the normal phase input end of amplifier U8A, after linking to each other with the outfan of amplifier U8A, the inverting input of amplifier U8A links to each other with the input of analog to digital conversion circuit 4, the 4th pin of chip U6 links to each other with the inverting input of comparator U7A, the normal phase input end of comparator U7A links to each other with the normal phase input end of amplifier U8A, and the outfan of comparator U7A links to each other with the 3rd pin of chip U6.Described chip U2, U4, U6 chip all adopt the AD734 chip.
The AD734 chip can directly carry out the multiplication and division computing, and is comparatively convenient and practical.Its chips U2 is that current operator part, chip U4 are that electric current and voltage hybrid operation part, chip U6 are the voltage operational part.Computing with sample rate current is that example describes below:
The 1st, 6 pins of chip U2 are signal input pins, and namely the signal of current sample by capacitor C 2 filtering, enters the 1st, 6 pins of chip U2 by the 1st pin of amplifier U1A, and the 12nd pin from chip U2 after computing is exported.The amplification of amplifier U3B is adjustable, by regulating the size of adjustable resistance R9, just can adjust the amplification of amplifier U3B.In addition, also have a feedback circuit after the 12nd pin of chip U2 and resistance R 5, receive the 3rd, 4 pins of chip U2 by comparator U3A, effect is to allow the 4th pin voltage and the feedback voltage of chip U2 compare, and capacitor C 4 has the effect of the concussion eliminated.Capacitor C 3 plays the effect of a bypass filtering, prevents from disturbing.Voltage V+ because the voltage of Zener diode Z1 is fixed, provides a fixing voltage therefore can for the 10th pin of chip U2 by resistance R 4 and Zener diode Z1.
Computing circuit structure and the function of the computing circuit of independent sampled voltage and independent sample rate current are basic identical.The 12nd pin from chip U6 after the sampled voltage computing is exported to amplifier U7B, and the effect of amplifier U7B is the output voltage of stablizing the 12nd pin of chip U6.Resistance R 23, R24, R25 series connection, wherein resistance R 24 is adjustable.The hybrid operation module of electric current, voltage is namely based on the computing module of chip U4, structure is similar to the current operator module, different is the 1st pin that capacitor C 5 meets amplifier U1A, capacitor C 6 links to each other with the 7th pin of amplifier U1B, namely input is not pure voltage or electric current, but voltage and current, outfan does not have feedback after the computing, the negative electrode of Zener diode Z1 connects the 3rd pin of comparator U5A, namely the 4th pin voltage with a fixed voltage and chip U4 compares, and capacitor C 8 can be removed interference.
In sum, the present invention samples to electric current, voltage respectively simultaneously by current sampling circuit 1, voltage sampling circuit 2, and can carry out independent voltage operational, independent current operator by computing circuit 3, and the hybrid operation of voltage and current, through multiple relatively coming output is monitored.The present invention can improve the accuracy of output monitoring, strengthens the reliability of monitoring.
Claims (5)
1. high frequency electric knife output observation circuit, it is characterized in that: comprise current sampling circuit (1) and voltage sampling circuit (2), the input of the two all links to each other with the power take-off mouth of high frequency electric knife, the outfan of the two all links to each other with the input of computing circuit (3), and the outfan of computing circuit (3) links to each other with the input of analog to digital conversion circuit (4); Described current sampling circuit (1) comprises current transducer T1, its primary coil is serially connected with P1-1 and the P1-2 of the power take-off mouth of high frequency electric knife, its secondary coil links to each other with the end of adjustable resistance R1, the other end of adjustable resistance R1 links to each other with the normal phase input end of capacitor C 1, amplifier U1A respectively, the inverting input of amplifier U1A links to each other with the end of resistance R 2, R3 respectively, the outfan of the other end of resistance R 2, amplifier U1A all links to each other with the input of computing circuit (3), the other end ground connection of resistance R 3; Described voltage sampling circuit (2) comprises voltage transmitter T2, its primary coil is connected to P2-1 and the P2-2 of the power take-off mouth of high frequency electric knife, its secondary coil links to each other with the end of adjustable resistance R18, the other end of adjustable resistance R18 links to each other with the normal phase input end of capacitor C 10, amplifier U1B respectively, the inverting input of amplifier U1B links to each other with an end of resistance R 19, and the outfan of the other end of resistance R 19, amplifier U1B all links to each other with the input of computing circuit (3); Described computing circuit (3) comprises be used to the chip U2 that carries out current operator, the 1st of chip U2,6 pins link to each other with the outfan of current sampling circuit (1), the 2nd of chip U2,5,7 pin ground connection, the 12nd pin of chip U2 links to each other with the normal phase input end of amplifier U3B, the inverting input of amplifier U3B links to each other with adjustable resistance R9, the outfan of amplifier U3B links to each other with the input of analog to digital conversion circuit (4), the 4th pin of chip U2 links to each other with the inverting input of comparator U3A, the normal phase input end of comparator U3A links to each other with the normal phase input end of amplifier U3B, and the outfan of comparator U3A links to each other with the 3rd pin of chip U2.
2. high frequency electric knife output observation circuit according to claim 1, it is characterized in that: described computing circuit (3) comprises be used to carrying out voltage, the chip U4 of electric current hybrid operation, the 1st pin of chip U4 links to each other with the outfan of current sampling circuit (1), the 6th pin of chip U4 links to each other with the outfan of voltage sampling circuit (2), the 2nd of chip U4,5,7 pin ground connection, the 12nd pin of chip U4 links to each other with the normal phase input end of amplifier U5B, the inverting input of amplifier U5B links to each other with adjustable resistance R16, the outfan of amplifier U5B links to each other with the input of analog to digital conversion circuit (4), the 4th pin of chip U4 links to each other with the inverting input of comparator U5A, the normal phase input end of comparator U5A links to each other with the negative electrode of Zener diode Z1, the plus earth of Zener diode Z1.
3. high frequency electric knife output observation circuit according to claim 1, it is characterized in that: described computing circuit (3) comprises be used to the chip U6 that carries out voltage operational, the 1st of chip U6,6 pins link to each other with the outfan of voltage sampling circuit (2), the 2nd of chip U6,5,7 pin ground connection, the 12nd pin of chip U6 links to each other with the normal phase input end of amplifier U7B, the inverting input of amplifier U7B links to each other with the outfan of amplifier U7B, the outfan of amplifier U7B links to each other with adjustable resistance R24 by resistance R 23, adjustable resistance R24 links to each other with the normal phase input end of amplifier U8A, after linking to each other with the outfan of amplifier U8A, the inverting input of amplifier U8A links to each other with the input of analog to digital conversion circuit (4), the 4th pin of chip U6 links to each other with the inverting input of comparator U7A, the normal phase input end of comparator U7A links to each other with the normal phase input end of amplifier U7B, and the outfan of comparator U7A links to each other with the 3rd pin of chip U6.
4. high frequency electric knife output observation circuit according to claim 1 is characterized in that: described analog to digital conversion circuit (4) adopts the MAX1247 chip, and the 2nd, 3,4 pins of MAX1247 chip all link to each other with the outfan of computing circuit (3).
5. according to the arbitrary described high frequency electric knife output observation circuit of claim 1 to 3, it is characterized in that: described chip U2, U4, U6 chip all adopt the AD734 chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210045247 CN102551881B (en) | 2012-02-27 | 2012-02-27 | Output power monitoring circuit of high frequency electrotome |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210045247 CN102551881B (en) | 2012-02-27 | 2012-02-27 | Output power monitoring circuit of high frequency electrotome |
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| CN102551881A CN102551881A (en) | 2012-07-11 |
| CN102551881B true CN102551881B (en) | 2013-09-11 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103424603A (en) * | 2013-05-22 | 2013-12-04 | 上海理工大学 | Electrosurgery output power detection device |
| CN103529378B (en) * | 2013-10-29 | 2016-03-16 | 重庆金山科技（集团）有限公司 | A kind of proving installation of argon high-frequency electric knife |
| CN103604986B (en) * | 2013-12-04 | 2016-06-01 | 重庆金山科技（集团）有限公司 | The power detecting method of a kind of electric knife and device |
| CN107831361A (en) * | 2017-10-27 | 2018-03-23 | 深圳华讯角度生物医疗电子科技有限公司 | A kind of power measurement instruments |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514129A (en) * | 1993-12-03 | 1996-05-07 | Valleylab Inc. | Automatic bipolar control for an electrosurgical generator |
| CN101487855A (en) * | 2009-02-22 | 2009-07-22 | 陈劲游 | Method for automatically recording voltage-losing meter-leaking electric energy in three-phase three-wire electric energy measurement |
| CN201319041Y (en) * | 2008-12-08 | 2009-09-30 | 徐鸿 | Frequency automatic tracking circuit of AC sampling measurement |
| CN201955389U (en) * | 2010-12-22 | 2011-08-31 | 川铁电气（天津）集团有限公司 | Single-phase alternating-current voltage and current acquisition circuit |
| CN202477845U (en) * | 2012-02-27 | 2012-10-10 | 安徽英特电子有限公司 | Monitoring circuit for output power of high-frequency electric knife |
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2012
- 2012-02-27 CN CN 201210045247 patent/CN102551881B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514129A (en) * | 1993-12-03 | 1996-05-07 | Valleylab Inc. | Automatic bipolar control for an electrosurgical generator |
| CN201319041Y (en) * | 2008-12-08 | 2009-09-30 | 徐鸿 | Frequency automatic tracking circuit of AC sampling measurement |
| CN101487855A (en) * | 2009-02-22 | 2009-07-22 | 陈劲游 | Method for automatically recording voltage-losing meter-leaking electric energy in three-phase three-wire electric energy measurement |
| CN201955389U (en) * | 2010-12-22 | 2011-08-31 | 川铁电气（天津）集团有限公司 | Single-phase alternating-current voltage and current acquisition circuit |
| CN202477845U (en) * | 2012-02-27 | 2012-10-10 | 安徽英特电子有限公司 | Monitoring circuit for output power of high-frequency electric knife |
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