CN105004470A - Pressure transmitter capable of stabilizing power supply voltage - Google Patents
Pressure transmitter capable of stabilizing power supply voltage Download PDFInfo
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- CN105004470A CN105004470A CN201510401639.5A CN201510401639A CN105004470A CN 105004470 A CN105004470 A CN 105004470A CN 201510401639 A CN201510401639 A CN 201510401639A CN 105004470 A CN105004470 A CN 105004470A
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- pin
- electric capacity
- integrated circuit
- xtr101
- potentiometer
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Abstract
A pressure transmitter capable of stabilizing a power supply voltage comprises an XTR101 integrated circuit. A pin 1 of the XTR101 integrated circuit is connected with a fixed contact of a first potentiometer. A pin 2 is connected with another fixed contact of the first potentiometer. A pin 3 is connected with one end of the first capacitor. A pin 4 is connected with one end of a second capacitor. A pin 7 is connected with the other end of the first capacitor, the other end of the second capacitor, one end of a third capacitor, one end of a first resistor, an anode of a voltage stabilizing diode and one end of a fourth capacitor. A pin 8 is connected with the other end of the fourth capacitor and a cathode of an anti-reverse diode. A pin 10 is connected with a pin 11 and a cathode of the voltage stabilizing diode. A pin 14 is connected with one end of a second resistor, and the other end of the second resistor is connected with a moving contact of the first potentiometer. The other end of the first resistor is connected with the other end of the third capacitor. The pressure transmitter provided by the invention is capable of improving accuracy of pressure detection.
Description
Technical field
The present invention relates to sensor detecting field, particularly a kind of pressure unit of Absorbable organic halogens supply voltage.
Background technology
Pressure transducer is a kind of sensor the most conventional in industrial practice, it is widely used in various industrial automatic control environment, relates to numerous industries such as water conservancy and hydropower, railway traffic, intelligent building, production automatic control, Aero-Space, military project, petrochemical industry, oil well, electric power, boats and ships, lathe, pipeline.Pressure transducer is for experiencing the pressure of liquid, gas or steam to produce pressure signal, pressure signal is transformed into 4 ~ 20mA DC signal output through pressure unit, carries out measuring, indicating and procedure regulation to supply the secondary instruments such as indicator alarm, registering instrument, regulator.Pressure transducer divides capacitance pressure transducer, diffusion silicon pressure sensor, ceramic pressure sensor and strain pressure transducer etc.
Pressure detection accuracy is easily disturbed by many factors.In commercial Application, pressure transducer is all mounted near test point, and display device or opertaing device are generally all on pulpit or switch board, and distance may tens of rice extremely hundreds of rice between the two.And signal is easy to be subject to external interference and produces loss in long range propagation process, finally affect the accuracy of pressure detection.Further, the power supply instability of pressure transducer also can impact the accuracy of pressure detection.
Summary of the invention
Problem to be solved by this invention is to provide a kind of pressure unit of Absorbable organic halogens supply voltage, adopts two-wire system electric current loop sending pressure signal, to improve signal antijamming capability, to reduce loss of signal.
For solving the problem, the invention provides a kind of pressure unit of Absorbable organic halogens supply voltage, comprise XTR101 integrated circuit, the first potentiometer, the second potentiometer, the first resistance, the second resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, voltage stabilizing diode and counnter attack diode, the pin 1 of described XTR101 integrated circuit connects a fixed contact of described first potentiometer, the pin 2 of described XTR101 integrated circuit connects another fixed contact of described first potentiometer, the pin 3 of described XTR101 integrated circuit connects described one end of first electric capacity and the negative output terminal of pressure transducer, the pin 4 of described XTR101 integrated circuit connects described one end of second electric capacity and the positive output end of pressure transducer, the pin 5 of described XTR101 integrated circuit connects a fixed contact of described second potentiometer, the pin 6 of described XTR101 integrated circuit connects another fixed contact of described second potentiometer and the moving contact of described second potentiometer, the pin 7 of described XTR101 integrated circuit connects the other end of described first electric capacity, the other end of described second electric capacity, one end of described 3rd electric capacity, one end of described first resistance, the positive pole of described voltage stabilizing diode and one end of described 4th electric capacity the negative output terminal of the pressure unit as described Absorbable organic halogens supply voltage, the pin 8 of described XTR101 integrated circuit connects the other end of described 4th electric capacity and the negative pole of described counnter attack diode, the pin 10 of described XTR101 integrated circuit connects the pin 11 of described XTR101 integrated circuit, the negative pole of described voltage stabilizing diode and the power end of pressure transducer, the pin 14 of described XTR101 integrated circuit connects one end of described second resistance, the other end of described second resistance connects the moving contact of described first potentiometer, the other end of described first resistance connects the described other end of the 3rd electric capacity and the earth terminal of pressure transducer, the positive pole of described counnter attack diode is as the positive output end of the pressure unit of described Absorbable organic halogens supply voltage.
XTR101 integrated circuit includes high precision table amplifier, a voltage to current converter and two identical 1mA precision constant current sources, the current signal that the voltage signal of pressure transducer automatically can be transformed to standard transmits, simultaneously for pressure transducer is powered, do not need additionally for pressure transducer provides power supply.Further, by the power end of pressure transducer and earth terminal shunt regulator diode, improve to pressure transducer for electrical stability.Transmit owing to pressure signal to be converted to two-wire system DC current, the current signal antijamming capability of transmission is strong and can overcome the defect that long range propagation makes voltage drop, namely reduces loss of signal.
Optionally, the maximum resistance of described first potentiometer is 100k Ω, and the maximum resistance of described second potentiometer is 100 Ω.
Optionally, the resistance value of described first resistance is 2.5k Ω.
Optionally, the resistance value of described second resistance is 1M Ω.
Optionally, described pressure transducer is MPX7200 integrated circuit.
Optionally, the capacitance of described first electric capacity, described second electric capacity, described 3rd electric capacity and described 4th electric capacity is 0.01 μ F.
Compared with prior art, the present invention has the following advantages:
The pressure unit of Absorbable organic halogens supply voltage provided by the invention, by MPX7200 integrated circuit, pressure signal is converted to the transmission of two-wire system DC current signal, the current signal antijamming capability of transmission is strong and can overcome the defect that long range propagation makes voltage drop, namely reduces loss of signal.Further, MPX7200 integrated circuit can be that pressure transducer carries out stable power-supplying by built-in precision constant current source and voltage stabilizing diode, does not need, additionally for pressure transducer provides power supply, to reduce the cost of pressure detection, improve pressure detection accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pressure unit of the Absorbable organic halogens supply voltage of the embodiment of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
Fig. 1 is the structural representation of the pressure unit of the Absorbable organic halogens supply voltage of the embodiment of the present invention, and the pressure unit of described Absorbable organic halogens supply voltage comprises XTR101 integrated circuit, the first potentiometer W1, the second potentiometer W1, the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, voltage stabilizing diode D2 and counnter attack diode D1.
Particularly, the pin 1 of described XTR101 integrated circuit connects a fixed contact of described first potentiometer W1, the pin 2 of described XTR101 integrated circuit connects another fixed contact of described first potentiometer W1, the pin 3 of described XTR101 integrated circuit connects described one end of first electric capacity C1 and the negative output terminal of pressure transducer, the pin 4 of described XTR101 integrated circuit connects described one end of second electric capacity C2 and the positive output end of pressure transducer, the pin 5 of described XTR101 integrated circuit connects a fixed contact of described second potentiometer W2, the pin 6 of described XTR101 integrated circuit connects another fixed contact of described second potentiometer W2 and the moving contact of described second potentiometer W2, the pin 7 of described XTR101 integrated circuit connects the other end of described first electric capacity C1, the other end of described second electric capacity C2, one end of described 3rd electric capacity C3, one end of described first resistance R1, the positive pole of described voltage stabilizing diode D2 and one end of described 4th electric capacity C4 the negative output terminal of the pressure unit as described Absorbable organic halogens supply voltage, the pin 8 of described XTR101 integrated circuit connects the other end of described 4th electric capacity C4 and the negative pole of described counnter attack diode D1, the pin 10 of described XTR101 integrated circuit connects the pin 11 of described XTR101 integrated circuit, the described negative pole of voltage stabilizing diode D2 and the power end of pressure transducer, the pin 14 of described XTR101 integrated circuit connects one end of described second resistance R2, the other end of described second resistance R2 connects the moving contact of described first potentiometer W1, the other end of described first resistance R1 connects the described other end of the 3rd electric capacity C3 and the earth terminal of pressure transducer, the positive pole of described counnter attack diode D1 is as the positive output end of the pressure unit of described Absorbable organic halogens supply voltage.The positive output end of the pressure unit of described Absorbable organic halogens supply voltage is circulation injection side, is namely suitable for the anode connecting external dc voltage source; The negative output terminal of the pressure unit of described Absorbable organic halogens supply voltage is circulation output terminal, is namely suitable for the negative terminal being connected external dc voltage source by external load resistors.
Can selecting according to practical application of described pressure transducer.In the present embodiment, for described pressure transducer for X-type silicon pressure sensor MPX7200 is described.The sensing unit of pressure transducer MPX7200 is the piece transverse piezoresistive strain gauge that arrangement forms cross shape on silicon diaphragm.When electric current passes through the axis of this cross strainometer, perpendicular other direction just can produce the output signal be directly proportional to pressure.Because the signalling channel of pressure transducer MPX7200 is short, thus its anti-noise degree is very high.
When the pressure chamber pressurized of pressure transducer MPX7200, its positive output end (2 pin of pressure transducer MPX7200) and negative output terminal (4 pin of pressure transducer MPX7200) export corresponding voltage signal to the pin 3 of described XTR101 integrated circuit and the pin 4 of described XTR101 integrated circuit, amplify through described XTR101 lsi internal circuit and after voltage/current conversion, export corresponding 4 ~ 20mA electric current by the pin 7 of described XTR101 integrated circuit and the pin 8 of described XTR101 integrated circuit to current loop.
The pin 14 external described first potentiometer W1 and described second resistance R2 of the pin 1 of described XTR101 integrated circuit, the pin 2 of described XTR101 integrated circuit and described XTR101 integrated circuit, forms initial zero setting circuit, namely regulates 4mA initial zero position; The pin 5 of described XTR101 integrated circuit and the external described second potentiometer W2 of the pin 6 of described XTR101 integrated circuit, can expire amplitude by regulation output; The pin 10 of described XTR101 integrated circuit and the pin 11 of described XTR101 integrated circuit export 1mA constant current respectively, namely provide the constant current-supplying of 2mA to pressure transducer MPX7200.Described voltage stabilizing diode D2 is parallel to power end and the earth terminal of pressure transducer MPX7200, can promote the stability of powering to pressure transducer MPX7200.The pressure unit of described Absorbable organic halogens supply voltage also arranges pin 3 filtering that described first electric capacity C1 is described XTR101 integrated circuit, pin 4 filtering that described second electric capacity C2 is described XTR101 integrated circuit is set, the interference in input signal can be reduced, improve the precision of pressure detection.The pressure unit of described Absorbable organic halogens supply voltage also arranges pin 7 and pin 8 filtering that described 4th electric capacity C4 is described XTR101 integrated circuit, can reduce the interference in outputing signal.The steady current that described XTR101 integrated circuit improves is converted to voltage by described first resistance R1, and described 3rd electric capacity C3 is parallel to the two ends of described first resistance R1, carries out filtering process to the pressure reduction at described first resistance R1 two ends.
In the present embodiment, the maximum resistance of described first potentiometer W1 is 100k Ω, the maximum resistance of described second potentiometer W2 is 100 Ω, the resistance value of described first resistance R1 is 2.5k Ω, the resistance value of described second resistance R2 is 1M Ω, and the capacitance of described first electric capacity C1, described second electric capacity C2, described 3rd electric capacity C3 and described 4th electric capacity C4 is 0.01 μ F.It should be noted that, the parameter of above-mentioned each device also can adjust when circuit debugging.
The above is only preferred embodiment of the present invention, and not do any pro forma restriction to the present invention, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present invention, all falls within protection scope of the present invention.
Claims (6)
1. the pressure unit of an Absorbable organic halogens supply voltage, it is characterized in that, comprise XTR101 integrated circuit, the first potentiometer, the second potentiometer, the first resistance, the second resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, voltage stabilizing diode and counnter attack diode;
The pin 1 of described XTR101 integrated circuit connects a fixed contact of described first potentiometer, the pin 2 of described XTR101 integrated circuit connects another fixed contact of described first potentiometer, the pin 3 of described XTR101 integrated circuit connects described one end of first electric capacity and the negative output terminal of pressure transducer, the pin 4 of described XTR101 integrated circuit connects described one end of second electric capacity and the positive output end of pressure transducer, the pin 5 of described XTR101 integrated circuit connects a fixed contact of described second potentiometer, the pin 6 of described XTR101 integrated circuit connects another fixed contact of described second potentiometer and the moving contact of described second potentiometer, the pin 7 of described XTR101 integrated circuit connects the other end of described first electric capacity, the other end of described second electric capacity, one end of described 3rd electric capacity, one end of described first resistance, the positive pole of described voltage stabilizing diode and one end of described 4th electric capacity the negative output terminal of the pressure unit as described Absorbable organic halogens supply voltage, the pin 8 of described XTR101 integrated circuit connects the other end of described 4th electric capacity and the negative pole of described counnter attack diode, the pin 10 of described XTR101 integrated circuit connects the pin 11 of described XTR101 integrated circuit, the negative pole of described voltage stabilizing diode and the power end of pressure transducer, the pin 14 of described XTR101 integrated circuit connects one end of described second resistance, the other end of described second resistance connects the moving contact of described first potentiometer, the other end of described first resistance connects the described other end of the 3rd electric capacity and the earth terminal of pressure transducer, the positive pole of described counnter attack diode is as the positive output end of the pressure unit of described Absorbable organic halogens supply voltage.
2. the pressure unit of Absorbable organic halogens supply voltage according to claim 1, is characterized in that, the maximum resistance of described first potentiometer is 100k Ω, and the maximum resistance of described second potentiometer is 100 Ω.
3. the pressure unit of Absorbable organic halogens supply voltage according to claim 1, is characterized in that, the resistance value of described first resistance is 2.5k Ω.
4. the pressure unit of Absorbable organic halogens supply voltage according to claim 1, is characterized in that, the resistance value of described second resistance is 1M Ω.
5. the pressure unit of Absorbable organic halogens supply voltage according to claim 1, is characterized in that, described pressure transducer is MPX7200 integrated circuit.
6. the pressure unit of Absorbable organic halogens supply voltage according to claim 1, is characterized in that, the capacitance of described first electric capacity, described second electric capacity, described 3rd electric capacity and described 4th electric capacity is 0.01 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510401639.5A CN105004470A (en) | 2015-07-10 | 2015-07-10 | Pressure transmitter capable of stabilizing power supply voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510401639.5A CN105004470A (en) | 2015-07-10 | 2015-07-10 | Pressure transmitter capable of stabilizing power supply voltage |
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| CN105004470A true CN105004470A (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510401639.5A Pending CN105004470A (en) | 2015-07-10 | 2015-07-10 | Pressure transmitter capable of stabilizing power supply voltage |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097034A1 (en) * | 2000-12-06 | 2002-07-25 | Yukihiko Tanizawa | Physical quantity detection device |
| CN1829033A (en) * | 2005-03-04 | 2006-09-06 | 昆山双桥传感器测控技术有限公司 | Lightningproof circuit and immersion type piezoresistance liquid level transmitter with the same |
| CN101446193A (en) * | 2008-12-12 | 2009-06-03 | 中国矿业大学 | Device and method for detecting coal seam gas pressure and coal wall stress |
| CN204730977U (en) * | 2015-07-10 | 2015-10-28 | 四川奇胜科技有限公司 | The pressure unit for electrical stability can be promoted |
-
2015
- 2015-07-10 CN CN201510401639.5A patent/CN105004470A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020097034A1 (en) * | 2000-12-06 | 2002-07-25 | Yukihiko Tanizawa | Physical quantity detection device |
| CN1829033A (en) * | 2005-03-04 | 2006-09-06 | 昆山双桥传感器测控技术有限公司 | Lightningproof circuit and immersion type piezoresistance liquid level transmitter with the same |
| CN101446193A (en) * | 2008-12-12 | 2009-06-03 | 中国矿业大学 | Device and method for detecting coal seam gas pressure and coal wall stress |
| CN204730977U (en) * | 2015-07-10 | 2015-10-28 | 四川奇胜科技有限公司 | The pressure unit for electrical stability can be promoted |
Non-Patent Citations (2)
| Title |
|---|
| 陈岩 胡秀芳: "采用高阻抗扩散硅压力传感器设计的4~20mA压力变送器", 《ECN/世界电子元器件》 * |
| 颜重光: "两线制变送器电路", 《电子技术应用》 * |
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Application publication date: 20151028 |
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