CN201429478Y - On-line pressure detection device - Google Patents
On-line pressure detection device Download PDFInfo
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- CN201429478Y CN201429478Y CN 200920108592 CN200920108592U CN201429478Y CN 201429478 Y CN201429478 Y CN 201429478Y CN 200920108592 CN200920108592 CN 200920108592 CN 200920108592 U CN200920108592 U CN 200920108592U CN 201429478 Y CN201429478 Y CN 201429478Y
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Abstract
An on-line pressure detection device belongs to the technical field in which electronic technology is applied in high-power thyristor converting. The device comprises a pressure detection unit, an EMIfiltering unit, a differential magnification unit, a signal comparing unit, a signal output unit, a threshold setting unit, and a shielding-driving unit. The utility model has the advantages that theEMI filter and the shielding-driving unit are added in a pressure detection circuit; the output of the pressure detection circuit can be switching value or analogue value; and the magnification ratioof the pressure detection circuit is adjustable.
Description
Technical field
The utility model belongs to electronic technology at high-power thyristor unsteady flow applied technical field, and a kind of online pressure-detecting device particularly is provided.It needs during at plate thyristor operate as normal certain clamp pressure and develop, and is a kind of pressure detection circuit.The auxiliary products that belong to 3L type high-power thyristor converter plant.
Background technology
Whether in the high-power thyristor converter plant, it is one of essential condition of thyristor operate as normal that thyristor clamps pressure, clamp pressure and be to reach ratings and all will produce great influence to the heat radiation of thyristor, electric current handling capacity, contact resistance etc.Temperature variation is very big during thyristor work, and the stress that produces owing to expanding with heat and contract with cold is also very big.Produce deformation along with the variation of time will make metal fixture, cause clamping pressure and descend, thereby make the thyristor converter devices can't operate as normal.Clamp pressure-detecting device and be used for online detection thyristor and clamp pressure, ' control device ' gathers the output signal that clamps pressure-detecting device at any time, to determine the duty of thyristor rectifier device.This device is extremely important in the high-power thyristor converter plant.
Summary of the invention
The utility model purpose is to provide a kind of online pressure-detecting device, has under strong electromagnetic interference environment, and online detection thyristor clamps the function of pressure.
The utility model comprises pressure sensing cell, EMI filter unit, differential motion amplifying unit, signal comparing unit, signal output unit, threshold setting unit, shielding driver element.See Fig. 1, Fig. 1 is the pressure-detecting device circuit theory diagrams.
Voltage output end Vi-w, the Vi-y of pressure sensing cell is connected on the inductance L 1, L2 of EMI filter unit, the voltage output end Vo of EMI filter unit
1, Vo
2Be connected on No. 3 pin of integrated operational amplifier U1, U5 of differential motion amplifying unit.The voltage output end Vo of differential motion amplifying unit
3Be connected on No. 3 pin of integrated operational amplifier U3 of signal comparing unit.The voltage output end Vo of signal comparing unit
4Be connected on No. 1 pin of adjustable accurate shunt regulator U6 of signal output unit.The voltage output end P4.5 of threshold setting unit is connected on No. 2 pin of integrated operational amplifier U3 of signal comparing unit.The amplifying signal that integrated operational amplifier U1, the U5 of differential motion amplifying unit produces is by resistance R 13, R14 voltage after partial output end vo
5Be connected on No. 3 pin of the integrated operational amplifier U1 that shields driver element.
Pressure sensing cell is made up of a pressure transducer separately, sees Fig. 1.Its effect is that the pressure signal that thyristor clamps is converted to voltage signal, and magnitude of voltage changes with the variation of pressure.Voltage output Vi-w, Vi-y are connected on the inductance L 1, L2 of EMI filter unit.Pressure transducer diameter and thyristor diameter are approaching.
The EMI filter unit is by inductance L 1, L2, and capacitor C 1, C2, C3 form, and see Fig. 1.Its effect is the various noise of filtering.Capacitor C 1 connects inductance L 1, L2.Inductance L 1, L2 connect capacitor C 2, C3.The millivolt voltage signal Vi-w, the Vi-y that are produced by the pressure transducer of pressure sensing cell are connected to inductance L 1, L2, carry out filtering on capacitor C 1, C2, the C3, and filtered voltage signal is Vo
1, Vo
2Vo
1, Vo
2Be connected respectively on No. 3 pin of integrated operational amplifier U1, U5 of differential motion amplifying unit.Two inductance L 1, L2 independently are placed on the circuit board separately in the electromagnetic interface filter, not coiling on same magnet ring.
Differential motion amplifying unit is by integrated operational amplifier U1, U2, U5, resistance R 1-5, resistance R 14-17, and potentiometer RP1 forms, and sees Fig. 1.Its effect is with the millivolt voltage signal Vo from the EMI filter unit
1, Vo
2Be enlarged into the volt magnitude voltage signals.No. 6 pin of integrated operational amplifier U1, U5 connect resistance R 1, R3, R13 and resistance R 15, R16, R14 respectively.Resistance R 1, R15 connect resistance R P1, R2 respectively.Resistance R 3, R16 connect resistance R 4, R17 and integrated operational amplifier U2 respectively.No. 6 pin of integrated operational amplifier U2 connect resistance R 5.Potentiometer RP1 is used for regulating the enlargement factor of differential amplifier.Voltage signal after the amplification is Vo
3Vo
3Be connected on No. 3 pin of integrated operational amplifier U3 of signal comparing unit.
The signal comparing unit is by integrated operational amplifier U3, and resistance R 6-8,18 forms, and sees Fig. 1.Its effect is the voltage signal Vo that differential motion amplifying unit was amplified
3The threshold voltage signal P4.5 that produces with the threshold setting unit compares.No. 6 pin of integrated operational amplifier U3 connect resistance R 6, R7, R8.Resistance R 8 connects R9.Voltage signal relatively is Vo
4Vo
4Be connected on No. 1 pin of adjustable accurate shunt regulator U6 of signal output unit.
Signal output unit is by relay J 1, adjustable accurate shunt regulator U6, diode D3, and resistance R 9, LED 1 is formed.Its effect is the pressure signal Vo that will configure
4Output to control device, with the work of control thyristor rectifier device.No. 3 pin of adjustable accurate shunt regulator U6 connect relay J 1A, diode D3.Resistance R 9 connects LED 1.LED 1 connects J1B.J1D is the output of pressure-detecting device.The duty of LED 1 indicated pressure pick-up unit.
The threshold setting unit is by adjustable accurate shunt regulator U7, resistance R 10,11,19, and potentiometer RP2 forms, and sees Fig. 1.Its effect is to produce the threshold voltage signal P4.5 that voltage is adjustable.Resistance R 10 connects R11, U7.Resistance R 11 connects RP2.Potentiometer RP2 connects U7, R19.No. 3 pin of U7 are threshold voltage P4.5.This threshold voltage signal P4.5 is connected to No. 2 pin of the integrated operational amplifier U3 of signal comparing unit.Can change threshold voltage by regulator potentiometer RP1.The rated pressure value of this voltage signal decision pressure-detecting device.
Shield driver element by integrated operational amplifier U4, resistance R 12, capacitor C 5 is formed, and sees Fig. 1.Its effect is to eliminate the noise that the input lead distributed capacitance produces.No. 6 pin of integrated operational amplifier U4 connect resistance R 12.Output signal is ' B '.' B ' is connected with the screen layer of pressure sensor signal line.
The utility model adds the shielding driving circuit in differential amplifier circuit; The enlargement factor of differential amplifier circuit is adjustable.
Advantage of the present utility model: in pressure detection circuit, added electromagnetic interface filter and shielding driving circuit; The output of pressure detection circuit can be that switching value also can be an analog quantity; The enlargement factor of pressure detection circuit is adjustable.
Description of drawings
Fig. 1 is the pressure-detecting device circuit theory diagrams.Wherein, pressure sensing cell 1, EMI filter unit 2, differential motion amplifying unit 3, signal comparing unit 4, signal output unit 5, threshold setting unit 6, shielding driver element 7.
Embodiment
Below in conjunction with Fig. 1 pressure-detecting device is described in detail.
According to Fig. 1 as can be known the utility model comprise pressure sensing cell 1, EMI filter unit 2, differential motion amplifying unit 3, signal comparing unit 4, signal output unit 5, threshold setting unit 6, shielding driver element 7.The millivolt voltage signal Vi-w, the Vi-y that are produced by pressure sensing cell 1 are connected to EMI filter unit 2 and carry out filtering, through 2 filtered millivolts of voltage signal Vo of EMI filter unit
1, Vo
2Be connected to differential motion amplifying unit 3 and amplify, be enlarged into the volt magnitude voltage signals.RP1 is used to adjust the enlargement factor of differential motion amplifying unit 3.Voltage signal Vo through differential motion amplifying unit 3 amplifications
3Being connected to signal comparing unit 4 compares with the voltage signal P4.5 that threshold setting unit 6 produces.Voltage signal Vo after process signal comparing unit 4 compares
4Be connected to signal output unit 5 and remove pilot relay J1A, pressure state is delivered to control device by the J1D of signal output unit 5.The voltage Vo that voltage between No. 6 pin of integrated operational amplifier U1, the U5 of differential motion amplifying unit 3 produces after resistance R 13, R14 dividing potential drop
5Be connected to shielding driver element 7, shielding driver element 7 output signals ' B ' are connected with the screen layer of pressure sensor signal line in order to eliminate the noise that the input lead distributed capacitance produces.
Pressure transducer in the utility model is selected the BK-4 type for use, and operational amplifier is selected the OP07 of positive and negative 15V power supply power supply for use, and other components and parts select for use universal component to get final product.
Claims (7)
1. an online pressure-detecting device comprises pressure sensing cell, EMI filter unit, differential motion amplifying unit, signal comparing unit, signal output unit, threshold setting unit, shielding driver element; It is characterized in that voltage output end Vi-w, the Vi-y of pressure sensing cell (1) is connected on the inductance L 1, L2 of EMI filter unit (2), the voltage output end Vo of EMI filter unit (2)
1, Vo
2Be connected on No. 3 pin of integrated operational amplifier U1, U5 of differential motion amplifying unit (3); The voltage output end Vo of differential motion amplifying unit (3)
3Be connected on No. 3 pin of integrated operational amplifier U3 of signal comparing unit (4); The voltage output end Vo of signal comparing unit (4)
4Be connected on No. 1 pin of adjustable accurate shunt regulator U6 of signal output unit (5); The voltage output end P4.5 of threshold setting unit (6) is connected on No. 2 pin of integrated operational amplifier U3 of signal comparing unit (4); The amplifying signal that integrated operational amplifier U1, the U5 of differential motion amplifying unit (3) produces is by resistance R 13, R14 voltage after partial output end vo
5Be connected on No. 3 pin of the integrated operational amplifier U1 that shields driver element (7);
2, online pressure-detecting device according to claim 1 is characterized in that, pressure sensing cell (1) is made up of a pressure transducer separately, and pressure transducer diameter and thyristor diameter are approaching.
3, online pressure-detecting device according to claim 1 is characterized in that, EMI filter unit (2) is by inductance L 1, L2, and capacitor C 1, C2, C3 form, and capacitor C 1 connects inductance L 1, L2; Inductance L 1, L2 connect capacitor C 2, C3; Two inductance L 1, L2 independently are placed on the circuit board separately in the electromagnetic interface filter.
4, online pressure-detecting device according to claim 1 is characterized in that, differential motion amplifying unit (3) is by integrated operational amplifier U1, U2, U5, resistance R 1-5, resistance R 14-17, and potentiometer RP1 forms; No. 6 pin of integrated operational amplifier U1, U5 connect resistance R 1, R3, R13 and resistance R 15, R16, R14 respectively; Resistance R 1, R15 connect resistance R P1, R2 respectively; Resistance R 3, R16 connect resistance R 4, R17 and integrated operational amplifier U2 respectively; No. 6 pin of integrated operational amplifier U2 connect resistance R 5.
5, online pressure-detecting device according to claim 1 is characterized in that, signal comparing unit (4) is by integrated operational amplifier U3, and resistance R 6-8,18 forms; No. 6 pin of integrated operational amplifier U3 connect resistance R 6, R7, R8.
6, online pressure-detecting device according to claim 1 is characterized in that, by adjustable accurate shunt regulator U7, resistance R 10,11,19, potentiometer RP2 forms threshold setting unit (6); Resistance R 10 connects R11, U7, and resistance R 11 connects RP2, and potentiometer RP2 connects U7, R19, and No. 3 pin of U7 are threshold voltage P4.5.
7, online pressure-detecting device according to claim 1 is characterized in that, shields driver element (7) by integrated operational amplifier U4, resistance R 12, and capacitor C 5 is formed; No. 6 pin of integrated operational amplifier U4 connect resistance R 12.Output signal is ' B ', and ' B ' is connected with the screen layer of pressure sensor signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920108592 CN201429478Y (en) | 2009-06-10 | 2009-06-10 | On-line pressure detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920108592 CN201429478Y (en) | 2009-06-10 | 2009-06-10 | On-line pressure detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201429478Y true CN201429478Y (en) | 2010-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920108592 Expired - Fee Related CN201429478Y (en) | 2009-06-10 | 2009-06-10 | On-line pressure detection device |
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| CN (1) | CN201429478Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106415228A (en) * | 2014-03-27 | 2017-02-15 | 西铁城精密器件株式会社 | Pressure-detecting device |
| CN110276857A (en) * | 2018-12-21 | 2019-09-24 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of processing method and circuit of aero-engine pressure sensor signal |
| CN110959103A (en) * | 2017-07-28 | 2020-04-03 | 夏普株式会社 | Weight meter, weight measuring method and toilet for animals |
| CN111122170A (en) * | 2019-11-28 | 2020-05-08 | 中国航空工业集团公司西安航空计算技术研究所 | High-precision resistance signal conditioning circuit and method based on current source |
-
2009
- 2009-06-10 CN CN 200920108592 patent/CN201429478Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106415228A (en) * | 2014-03-27 | 2017-02-15 | 西铁城精密器件株式会社 | Pressure-detecting device |
| CN106415228B (en) * | 2014-03-27 | 2019-11-12 | 西铁城精密器件株式会社 | Pressure-detecting device |
| CN110959103A (en) * | 2017-07-28 | 2020-04-03 | 夏普株式会社 | Weight meter, weight measuring method and toilet for animals |
| CN110276857A (en) * | 2018-12-21 | 2019-09-24 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of processing method and circuit of aero-engine pressure sensor signal |
| CN111122170A (en) * | 2019-11-28 | 2020-05-08 | 中国航空工业集团公司西安航空计算技术研究所 | High-precision resistance signal conditioning circuit and method based on current source |
| CN111122170B (en) * | 2019-11-28 | 2022-01-25 | 中国航空工业集团公司西安航空计算技术研究所 | High-precision resistance signal conditioning circuit and method based on current source |
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Legal Events
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20180610 |