CN204202773U - A kind of high-frequency and high-voltage power supply temperature sensing circuit - Google Patents
A kind of high-frequency and high-voltage power supply temperature sensing circuit Download PDFInfo
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- CN204202773U CN204202773U CN201420792257.0U CN201420792257U CN204202773U CN 204202773 U CN204202773 U CN 204202773U CN 201420792257 U CN201420792257 U CN 201420792257U CN 204202773 U CN204202773 U CN 204202773U
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- 238000010586 diagram Methods 0.000 claims abstract description 9
- 230000005405 multipole Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Abstract
The utility model discloses a kind of high-frequency and high-voltage power supply temperature sensing circuit, comprise bridge diagram and amplifying circuit, bridge diagram comprises resistance R1, resistance R2, resistance R4 and resistance R5, and amplifying circuit comprises amplifier IC1, chip IC 4, amplifier IC2, amplifier IC3, amplifier IC5 and amplifier IC6.The utility model circuit system uses multiple LM358 amplifier and AD620 type instrumentation amplifier to carry out multistage amplification to sampled signal, the enlargement factor of signal is made to be more than 30 times, HCNR201 type photo-coupler is used to carry out Phototube Coupling, add anti-interference, bridge type structure is used to convert temperature signal to voltage signal, effectively eliminate the error that resistance itself brings, improve the precision of circuit, the temperature detection adopting this structure to carry out high-frequency and high-voltage power supply has highly sensitive, that accuracy of detection is high, linear monitoring effect is good advantage.
Description
Technical field
The utility model relates to a kind of high-voltage power supply, specifically a kind of highly sensitive, high-frequency and high-voltage power supply temperature sensing circuit that precision is high.
Background technology
High-frequency and high-voltage power supply is a kind of conventional power supply in commercial production, be widely used in electrostatic precipitation, the fields such as fume purifying, general high-frequency and high-voltage power supply is all arranged on the tower top of this kind equipment, environment temperature around it is often very high, particularly in the summer of sweltering heat, environment temperature reaches 40 more and spends, power supply operationally itself also can produce very large heat, step-up transformer in high-frequency and high-voltage power supply is also very high to the requirement of temperature, the aging of power supply can be accelerated under allowing high-frequency and high-voltage power supply be in the condition of high temperature for a long time, What is more, directly may burn out power supply, it is low to there is precision in traditional high-frequency and high-voltage power supply temperature sensing circuit, poor sensitivity, effectively can not carry out linearity test.
Utility model content
The purpose of this utility model is to provide a kind of highly sensitive, high-frequency and high-voltage power supply temperature sensing circuit that precision is high, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of high-frequency and high-voltage power supply temperature sensing circuit, comprise bridge diagram and amplifying circuit, described bridge diagram comprises resistance R1, resistance R2, resistance R4 and resistance R5, and described amplifying circuit comprises amplifier IC1, chip IC 4, amplifier IC2, amplifier IC3, amplifier IC5 and amplifier IC6;
One end contact resistance R2 of resistance R1 and power supply U1, the other end contact resistance R4 of resistance R1, the other end contact resistance R5 of resistance R4 and resistance R6, the other end contact resistance R3 of resistance R2 and resistance R7, the other end of the other end contact resistance R5 of resistance R3 ground connection, the other end of resistance R7 connects 2 pins of amplifier IC1, the 1 pin contact resistance R8 of amplifier IC1, the other end of resistance R8 connects 8 pins of amplifier IC1, the other end of the 3 pin contact resistance R6 of amplifier IC1, the 5 pin ground connection of amplifier IC1, 6 pins of amplifier IC1 connect 2 pins of amplifier IC2, 7 pins of amplifier IC1 connect power supply U1, the 1 pin contact resistance R9 of amplifier IC2 and electric capacity C1, the other end contact resistance R10 of resistance R9, the other end of electric capacity C1 and 5 pins of amplifier IC2, 4 pins of amplifier IC2 connect power supply U1, the 3 pin ground connection of amplifier IC2, the other end of resistance R10 connects electric capacity C2, 1 pin of amplifier IC3 and 3 pins of chip IC 4, 2 pins of amplifier IC3 connect 3 pins of amplifier IC3 and ground connection, 4 pins of amplifier IC3 connect power supply U1, the 5 pin contact resistance R11 of amplifier IC3 and 1 pin of chip IC 4, the other end of the other end contact resistance C2 of resistance R11, 2 pins of chip IC 4 connect power supply U1, 4 pin ground connection of chip IC 4, 5 pins of chip IC 4 connect 2 pins of amplifier IC5, 6 pins of chip IC 4 connect 12 pins of amplifier IC5, resistance R12 and electric capacity C3, 4 pins of amplifier IC5 connect power supply U1, the 3 pin ground connection of amplifier IC5, 5 pins of amplifier IC5 connect 2 pins of amplifier IC6, resistance R12 and electric capacity C3, the 1 pin contact resistance R13 of amplifier IC6 and electric capacity C4, 4 pins of amplifier IC6 connect power supply U1, the 3 pin ground connection of amplifier IC6, the 5 pin contact resistance R14 of amplifier IC6, resistance R12 and electric capacity C3, the other end of resistance R14 connects electric capacity C5, the negative pole of diode T1 and output Temp-out, the positive pole of diode T1 connects the other end of electric capacity C5 and ground connection.
As preferred version of the present utility model: described amplifier IC2, IC3, IC5 and IC6 are LM358 type amplifier, and described amplifier IC1 is AD620 instrumentation amplifier, described chip IC 4 is HCRN201 type photo-coupler.
As preferred version of the present utility model: described power supply U1 is 12V direct current.
As preferred version of the present utility model: described resistance R5 is PT100 type thermistor, the resistance of resistance R3 is 100 ohm.
Compared with prior art, the beneficial effects of the utility model are: circuit uses multiple LM358 amplifier and AD620 type instrumentation amplifier to carry out multistage amplification to sampled signal, the enlargement factor of signal is made to be more than 30 times, HCNR201 type photo-coupler is used to carry out Phototube Coupling, add anti-interference, bridge type structure is used to convert temperature signal to voltage signal, effectively eliminate the error that resistance itself brings, improve the precision of circuit, the temperature detection adopting this structure to carry out high-frequency and high-voltage power supply has highly sensitive, accuracy of detection is high, the advantage that linear monitoring effect is good.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of high-frequency and high-voltage power supply temperature sensing circuit;
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of high-frequency and high-voltage power supply temperature sensing circuit, comprise bridge diagram and amplifying circuit, bridge diagram comprises resistance R1, resistance R2, resistance R4 and resistance R5, and amplifying circuit comprises amplifier IC1, chip IC 4, amplifier IC2, amplifier IC3, amplifier IC5 and amplifier IC6;
One end contact resistance R2 of resistance R1 and power supply U1, the other end contact resistance R4 of resistance R1, the other end contact resistance R5 of resistance R4 and resistance R6, the other end contact resistance R3 of resistance R2 and resistance R7, the other end of the other end contact resistance R5 of resistance R3 ground connection, the other end of resistance R7 connects 2 pins of amplifier IC1, the 1 pin contact resistance R8 of amplifier IC1, the other end of resistance R8 connects 8 pins of amplifier IC1, the other end of the 3 pin contact resistance R6 of amplifier IC1, the 5 pin ground connection of amplifier IC1, 6 pins of amplifier IC1 connect 2 pins of amplifier IC2, 7 pins of amplifier IC1 connect power supply U1, the 1 pin contact resistance R9 of amplifier IC2 and electric capacity C1, the other end contact resistance R10 of resistance R9, the other end of electric capacity C1 and 5 pins of amplifier IC2, 4 pins of amplifier IC2 connect power supply U1, the 3 pin ground connection of amplifier IC2, the other end of resistance R10 connects electric capacity C2, 1 pin of amplifier IC3 and 3 pins of chip IC 4, 2 pins of amplifier IC3 connect 3 pins of amplifier IC3 and ground connection, 4 pins of amplifier IC3 connect power supply U1, the 5 pin contact resistance R11 of amplifier IC3 and 1 pin of chip IC 4, the other end of the other end contact resistance C2 of resistance R11, 2 pins of chip IC 4 connect power supply U1, 4 pin ground connection of chip IC 4, 5 pins of chip IC 4 connect 2 pins of amplifier IC5, 6 pins of chip IC 4 connect 12 pins of amplifier IC5, resistance R12 and electric capacity C3, 4 pins of amplifier IC5 connect power supply U1, the 3 pin ground connection of amplifier IC5, 5 pins of amplifier IC5 connect 2 pins of amplifier IC6, resistance R12 and electric capacity C3, the 1 pin contact resistance R13 of amplifier IC6 and electric capacity C4, 4 pins of amplifier IC6 connect power supply U1, the 3 pin ground connection of amplifier IC6, the 5 pin contact resistance R14 of amplifier IC6, resistance R12 and electric capacity C3, the other end of resistance R14 connects electric capacity C5, the negative pole of diode T1 and output Temp-out, the positive pole of diode T1 connects the other end of electric capacity C5 and ground connection.
Amplifier IC2, IC3, IC5 and IC6 are LM358 type amplifier, and described amplifier IC1 is AD620 instrumentation amplifier, and described chip IC 4 is HCRN201 type photo-coupler.
Power supply U1 is 12V direct current.
Resistance R5 is PT100 type thermistor, and the resistance of resistance R3 is 100 ohm.
Principle of work of the present utility model is: when environment temperature is 0 degree Celsius, the resistance of thermistor R5 is 100 ohm, 2 pins now flowing to instrumentation amplifier IC1 are identical with the voltage of 3 pins, exporting Temp-out is 0, along with the rising of measured temperature, the resistance of thermistor R5 increases, the voltage now flowing to 2 pins of instrumentation amplifier IC1 and 3 pins is variant, by detecting voltage extent, the temperature that PT100 detects can be known, because the voltage differential signal collected is very little, be difficult to directly measure, therefore multiple LM358 amplifier and AD620 type instrumentation amplifier is selected to carry out multipole amplification to sampled signal, and use HCNR201 type photo-coupler to carry out Phototube Coupling, the enlargement factor of signal is made to be more than 30 times, the change of measured temperature can be detected accurately, and the voltage swing of the output Temp-out recorded and temperature are good linear relationship, pass through ppu, testing result is informed user.
Claims (4)
1. a high-frequency and high-voltage power supply temperature sensing circuit, comprises bridge diagram and multipole amplifying circuit; It is characterized in that, described bridge diagram comprises resistance R1, resistance R2, resistance R4 and resistance R5, and described multipole amplifying circuit comprises amplifier IC1, chip IC 4, amplifier IC2, amplifier IC3, amplifier IC5 and amplifier IC6;
One end contact resistance R2 of resistance R1 and power supply U1, the other end contact resistance R4 of resistance R1, the other end contact resistance R5 of resistance R4 and resistance R6, the other end contact resistance R3 of resistance R2 and resistance R7, the other end of the other end contact resistance R5 of resistance R3 ground connection, the other end of resistance R7 connects 2 pins of amplifier IC1, the 1 pin contact resistance R8 of amplifier IC1, the other end of resistance R8 connects 8 pins of amplifier IC1, the other end of the 3 pin contact resistance R6 of amplifier IC1, the 5 pin ground connection of amplifier IC1, 6 pins of amplifier IC1 connect 2 pins of amplifier IC2, 7 pins of amplifier IC1 connect power supply U1, the 1 pin contact resistance R9 of amplifier IC2 and electric capacity C1, the other end contact resistance R10 of resistance R9, the other end of electric capacity C1 and 5 pins of amplifier IC2, 4 pins of amplifier IC2 connect power supply U1, the 3 pin ground connection of amplifier IC2, the other end of resistance R10 connects electric capacity C2, 1 pin of amplifier IC3 and 3 pins of chip IC 4, 2 pins of amplifier IC3 connect 3 pins of amplifier IC3 and ground connection, 4 pins of amplifier IC3 connect power supply U1, the 5 pin contact resistance R11 of amplifier IC3 and 1 pin of chip IC 4, the other end of the other end contact resistance C2 of resistance R11, 2 pins of chip IC 4 connect power supply U1, 4 pin ground connection of chip IC 4, 5 pins of chip IC 4 connect 2 pins of amplifier IC5, 6 pins of chip IC 4 connect 12 pins of amplifier IC5, resistance R12 and electric capacity C3, 4 pins of amplifier IC5 connect power supply U1, the 3 pin ground connection of amplifier IC5, 5 pins of amplifier IC5 connect 2 pins of amplifier IC6, resistance R12 and electric capacity C3, the 1 pin contact resistance R13 of amplifier IC6 and electric capacity C4, 4 pins of amplifier IC6 connect power supply U1, the 3 pin ground connection of amplifier IC6, the 5 pin contact resistance R14 of amplifier IC6, resistance R12 and electric capacity C3, the other end of resistance R14 connects electric capacity C5, the negative pole of diode T1 and output Temp-out, the positive pole of diode T1 connects the other end of electric capacity C5 and ground connection.
2. a kind of high-frequency and high-voltage power supply temperature sensing circuit according to claim 1, it is characterized in that, described amplifier IC2, IC3, IC5 and IC6 are LM358 type amplifier, and described amplifier IC1 is AD620 instrumentation amplifier, and described chip IC 4 is HCRN201 type photo-coupler.
3. a kind of high-frequency and high-voltage power supply temperature sensing circuit according to claim 1, is characterized in that, described power supply U1 is 12V direct current.
4. a kind of high-frequency and high-voltage power supply temperature sensing circuit according to claim 1, is characterized in that, described resistance R5 is PT100 type thermistor, and the resistance of resistance R3 is 100 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420792257.0U CN204202773U (en) | 2014-12-02 | 2014-12-02 | A kind of high-frequency and high-voltage power supply temperature sensing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420792257.0U CN204202773U (en) | 2014-12-02 | 2014-12-02 | A kind of high-frequency and high-voltage power supply temperature sensing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204202773U true CN204202773U (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420792257.0U Expired - Fee Related CN204202773U (en) | 2014-12-02 | 2014-12-02 | A kind of high-frequency and high-voltage power supply temperature sensing circuit |
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| CN (1) | CN204202773U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106354175A (en) * | 2016-10-13 | 2017-01-25 | 广西大学 | Medicine storage environment management system |
| CN109904848A (en) * | 2019-03-29 | 2019-06-18 | 哈尔滨理工大学 | One simple circuit for preventing reverse connection of power supply |
-
2014
- 2014-12-02 CN CN201420792257.0U patent/CN204202773U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106354175A (en) * | 2016-10-13 | 2017-01-25 | 广西大学 | Medicine storage environment management system |
| CN109904848A (en) * | 2019-03-29 | 2019-06-18 | 哈尔滨理工大学 | One simple circuit for preventing reverse connection of power supply |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20151202 |
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| EXPY | Termination of patent right or utility model |