CN202477845U - Monitoring circuit for output power of high-frequency electric knife - Google Patents
Monitoring circuit for output power of high-frequency electric knife Download PDFInfo
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- CN202477845U CN202477845U CN2012200648951U CN201220064895U CN202477845U CN 202477845 U CN202477845 U CN 202477845U CN 2012200648951 U CN2012200648951 U CN 2012200648951U CN 201220064895 U CN201220064895 U CN 201220064895U CN 202477845 U CN202477845 U CN 202477845U
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Abstract
The utility model relates to a monitoring circuit for the output power of a high-frequency electric knife. The monitoring circuit comprises a current sampling circuit and a voltage sampling circuit, the input ends of the current sampling circuit and the voltage sampling circuit are all connected with a power output port of the high-frequency electric knife, the output ends of the current sampling circuit and the voltage sampling circuit are all connected with the input end of an operational circuit, and the output end of the operational circuit is connected with the input end of an analog-to-digital conversion circuit. According to the monitoring circuit, the current and the voltage are simultaneously sampled by the current sampling circuit and the voltage sampling circuit respectively, the single voltage operation, the single current operation and the hybrid operation of the voltage and the current are implemented by the operational circuit, and the output power is monitored by multiple comparison; and the monitoring accuracy of the output power is improved, and the monitoring reliability is enhanced.
Description
Technical field
This utility model relates to a kind of observation circuit, especially a kind of high frequency electric knife output observation circuit.
Background technology
At present, more single to 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.
The utility model content
The purpose of this utility model is to provide a kind of high frequency electric knife output observation circuit that can improve monitoring precision, strengthen monitoring reliability.
For realizing above-mentioned purpose; This utility model 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, and 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.
Can know by technique scheme; This utility model is sampled to electric current, voltage respectively through current sampling circuit, voltage sampling circuit simultaneously; And can carry out separate voltages computing, independent current operator through computing circuit; And the hybrid operation of voltage and current, through multiple relatively coming output is monitored.This utility model can improve the accuracy of output monitoring, strengthens the reliability of monitoring.
Description of drawings
Fig. 1 is the circuit theory diagrams of this utility model.
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, and 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 through microcontroller MCU, and is 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 accomplished 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.
Below in conjunction with Fig. 1 this utility model is described further.
Described current sampling circuit 1 comprises current transducer T1; Its primary coil is serially connected with the 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, and 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 composition loop, the signal of coupling sampling can be exported different values then through regulating adjustable resistance R1, is amplified by the 3rd pin of amplifier U1A; 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, share 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 the 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, and 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 the chip U2 that is used to carry out current operator; The 1st, 6 pins of chip U2 link to each other with the outfan of current sampling circuit 1; The 2nd, 5, the 7 pin ground connection of chip U2, the 12nd pin of chip U2 links to each other with the normal phase input end of amplifier U3B, and 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, and 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 the chip U4 that is used to carry out voltage, 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, 5, the 7 pin ground connection of chip U4, the 12nd pin of chip U4 links to each other with the normal phase input end of amplifier U5B, and 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, and 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 the chip U6 that is used to carry out voltage operational; The 1st, 6 pins of chip U6 link to each other with the outfan of voltage sampling circuit 2; The 2nd, 5, the 7 pin ground connection of chip U6, the 12nd pin of chip U6 links to each other with the normal phase input end of amplifier U7B, and 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 through resistance R 23; Adjustable resistance R24 links to each other with the normal phase input end of amplifier U8A, links to each other with the input of analog to digital conversion circuit 4 after the inverting input of amplifier U8A links to each other with the outfan of amplifier U8A, and 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 promptly the signal of current sample through capacitor C 2 filtering, gets into 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, through regulating the size of adjustable resistance R9, just can adjust the amplification of amplifier U3B.In addition, after the 12nd pin of chip U2 and resistance R 5, also have a feedback circuit, receive the 3rd, 4 pins of chip U2 through comparator U3A, effect is to let the 4th pin voltage and the feedback voltage of chip U2 compare, and capacitor C 4 has the effect of shaking of eliminating.Capacitor C 3 plays the effect of a bypass filtering, prevents to disturb.Voltage V+ because the voltage of Zener diode Z1 is fixed, provides a fixed voltage therefore can for the 10th pin of chip U2 through resistance R 4 and Zener diode Z1.
The 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 an 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 promptly is master's computing module with chip U4; Structure is similar with the current operator module, and different is the 1st pin that capacitor C 5 meets amplifier U1A, and capacitor C 6 links to each other with the 7th pin of amplifier U1B; Promptly input is not pure voltage or electric current; But voltage and current, outfan does not have feedback after the computing, and the negative electrode of Zener diode Z1 connects the 3rd pin of comparator U5A; Promptly the 4th pin voltage with a fixed voltage and chip U4 compares, and capacitor C 8 can be removed interference.
In sum; This utility model is sampled to electric current, voltage respectively through current sampling circuit 1, voltage sampling circuit 2 simultaneously; And can carry out separate voltages computing, independent current operator through computing circuit 3; And the hybrid operation of voltage and current, through multiple relatively coming output is monitored.This utility model can improve the accuracy of output monitoring, strengthens the reliability of monitoring.
Claims (8)
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).
2. high frequency electric knife output observation circuit according to claim 1; It is characterized in that: described current sampling circuit (1) comprises current transducer T1; Its primary coil is serially connected with the 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, and the other end of adjustable resistance R1 links to each other with the normal phase input end of capacitor C 1, amplifier U1A respectively, and 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.
3. high frequency electric knife output observation circuit according to claim 1; It is characterized in that: described voltage sampling circuit (2) comprises voltage transmitter T2; Its primary coil is connected to the 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, and 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).
4. high frequency electric knife output observation circuit according to claim 1; It is characterized in that: described computing circuit (3) comprises the chip U2 that is used to carry out current operator; The 1st, 6 pins of chip U2 link to each other with the outfan of current sampling circuit (1); The 2nd, 5, the 7 pin ground connection of chip U2, the 12nd pin of chip U2 links to each other with the normal phase input end of amplifier U3B, and 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, and 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.
5. high frequency electric knife output observation circuit according to claim 1; It is characterized in that: described computing circuit (3) comprises the chip U4 that is used to carry out voltage, electric current hybrid operation; The 1st pin of chip U4 links to each other with the outfan of current sampling circuit (1), and the 6th pin of chip U4 links to each other with the outfan of voltage sampling circuit (2), the 2nd, 5, the 7 pin ground connection of chip U4; 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, and the outfan of amplifier U5B links to each other with the input of analog to digital conversion circuit (4), and 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.
6. high frequency electric knife output observation circuit according to claim 1; It is characterized in that: described computing circuit (3) comprises the chip U6 that is used to carry out voltage operational; The 1st, 6 pins of chip U6 link to each other with the outfan of voltage sampling circuit (2); The 2nd, 5, the 7 pin ground connection of chip U6, the 12nd pin of chip U6 links to each other with the normal phase input end of amplifier U7B, and 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 through resistance R 23; Adjustable resistance R24 links to each other with the normal phase input end of amplifier U8A, links to each other with the input of analog to digital conversion circuit (4) after the inverting input of amplifier U8A links to each other with the outfan of amplifier U8A, and 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.
7. 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).
8. according to claim 4 or 5 or 6 described high frequency electric knife output observation circuits, it is characterized in that: described chip U2, U4, U6 chip all adopt the AD734 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200648951U CN202477845U (en) | 2012-02-27 | 2012-02-27 | Monitoring circuit for output power of high-frequency electric knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200648951U CN202477845U (en) | 2012-02-27 | 2012-02-27 | Monitoring circuit for output power of high-frequency electric knife |
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| Publication Number | Publication Date |
|---|---|
| CN202477845U true CN202477845U (en) | 2012-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200648951U Withdrawn - After Issue CN202477845U (en) | 2012-02-27 | 2012-02-27 | Monitoring circuit for output power of high-frequency electric knife |
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| Country | Link |
|---|---|
| CN (1) | CN202477845U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102551881A (en) * | 2012-02-27 | 2012-07-11 | 安徽英特电子有限公司 | Output power monitoring circuit of high frequency electrotome |
-
2012
- 2012-02-27 CN CN2012200648951U patent/CN202477845U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102551881A (en) * | 2012-02-27 | 2012-07-11 | 安徽英特电子有限公司 | Output power monitoring circuit of high frequency electrotome |
| CN102551881B (en) * | 2012-02-27 | 2013-09-11 | 安徽英特电子有限公司 | Output power monitoring circuit of high frequency electrotome |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20130911 |
|
| RGAV | Abandon patent right to avoid regrant |