CN100374824C - Temperature-pressure sensor - Google Patents
Temperature-pressure sensor Download PDFInfo
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- CN100374824C CN100374824C CNB2005100308367A CN200510030836A CN100374824C CN 100374824 C CN100374824 C CN 100374824C CN B2005100308367 A CNB2005100308367 A CN B2005100308367A CN 200510030836 A CN200510030836 A CN 200510030836A CN 100374824 C CN100374824 C CN 100374824C
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- temperature
- pressure
- sensor circuit
- pressure transmitter
- pressure sensor
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Abstract
The present invention discloses a temperature and pressure sensor which comprises a shell body, a temperature sensing element, four pressure sensing elements, a temperature sensor circuit and a pressure sensor circuit, wherein the shell body is composed of a probe head body and a cavity body which is connected to the probe head body; the temperature sensor circuit and the pressure sensor circuit are arranged in the cavity body; one end surface of the probe head body is provided with an installing hole, the temperature sensing element is arranged in the installing hole, the end surface of the probe head body is also provided with four liquid entering and expelling holes, and pressure sensing elements are respectively arranged in the liquid entering and expelling holes. The temperature and pressure sensor simplifies the manufacturing structure technology, simultaneously collects temperature and pressure parameters in the same position, ensures the identity of the positions of measured point and is favorable to carry out the data fusion and data compensation of various parameters.
Description
Technical field
The present invention relates to a kind of temperature and pressure transmitter that temperature sampling and force samples are integrated together.
Background technology
Sensor is the vitals in the industrial control system, the existing sensors measuring technique is very ripe, and measurement index improves constantly, yet a sensor can only be measured a parameter, measurement signal kinds and function coverage rate to the measurement of more physics and chemical signal and multi-parameter signals are all very narrow, do not satisfy the development need of growing automatically-monitored technology far away.Often need to measure a plurality of parameters a position in the engineering, for example in the diesel applications field, often need measure the temperature and pressure of exhausr port simultaneously, measure this two physical quantitys simultaneously if adopt discrete temperature sensor and pressure transducer, usually on pipeline, punch respectively, increase perforate quantity, and be difficult to guarantee the locational homogeneity in measured point, be unfavorable for carrying out the data fusion and the compensation data of various parameters.
Summary of the invention
The present invention provides a kind of temperature and pressure transmitter for addressing the above problem, it can be on same position collecting temperature and pressure simultaneously.
The present invention addresses the above problem the technical scheme that adopts to provide a kind of temperature and pressure transmitter, it comprises a housing, this housing is made of a sonde body and a connected cavity, also comprises a temperature sensitive member, four pressure responsive element, a temperature sensor circuit and pressure sensor circuits; This temperature sensor circuit and pressure sensor circuit are arranged in the cavity; Sonde body one end face is provided with mounting hole, temperature sensitive member is arranged on this mounting hole, and is electrically connected to temperature sensor circuit, also is interval with four fluid passing holes on this end face, pressure responsive element is separately positioned in this fluid passing hole, and is electrically connected to pressure sensor circuit.
Above-mentioned mounting hole is located at an end face center of sonde body, and it is on the circumference in the center of circle that four fluid passing holes are symmetrically set in this end face center.Also be provided with a through hole on the one side wall of sonde body, the lead-in wire of temperature sensitive member passes mounting hole and is connected with temperature sensor circuit in the cavity via through hole.Temperature sensor circuit comprises three resistance, and these three resistance and temperature sensitive member connect and compose Wheatstone bridge, is used for the collecting temperature variation and changes into electric signal output.
Above-mentioned pressure sensor circuit comprises many leads, and these four pressure responsive element are made of force-sensing resistor respectively, and it is interconnected to constitute Wheatstone bridge by lead, is used for the change in fluid pressure of acquisition stream warp and is converted into electric signal output.Pressure sensor circuit also can comprise at least one balance resistance, is used for being in series with pressure responsive element, and Wheatstone bridge reaches balance when making no pressure.
Temperature and pressure transmitter of the present invention also comprises the heat insulating mattress that is arranged between described sonde body and the described cavity, is used for preventing the circuit board of temperature conduction to cavity, prevents that effectively the sampling temperature of circuit board from floating.The heat insulating mattress material can be a polycarbonate.
Temperature and pressure transmitter of the present invention has been simplified the structural manufacturing process of making, and on same position collecting temperature and pressure parameter simultaneously, guaranteed the homogeneity of position, measured point, help carrying out the data fusion and the compensation data of various parameters.
Description of drawings
Below in conjunction with the description of drawings specific embodiment of the invention, wherein:
Fig. 1 is the structural drawing of temperature and pressure transmitter of the present invention;
Fig. 2 is an end view drawing of sonde body of the present invention;
Fig. 3 is the circuit diagram of temperature sensor circuit of the present invention;
Fig. 4 is the lead-in wire synoptic diagram of temperature-sensing element of the present invention;
Fig. 5 is the circuit diagram of pressure sensor circuit of the present invention.
Embodiment
See also Fig. 1, temperature and pressure transmitter of the present invention comprises housing 100, it is made of sonde body 10 and the cavity 20 that is connected on the sonde body 10, and housing 100 also comprises temperature sensitive member 31, four pressure responsive element 41, a temperature sensor circuit 30 and pressure sensor circuits 40.Temperature sensor circuit 30 and pressure sensor circuit 40 are located in the cavity 20, and they are placed in (not shown) in the circuit board.Cavity 20 can adopt aluminum alloy materials, its intensity height, in light weight.Cavity 20 lower ends are provided with the incoming line 21 of circuit board power lead and signal wire, and incoming line 21 adopts stuffing-box, has water-proof function.
Temperature-sensing element 31 mainly is made of the thermistor that is bar type.In the present embodiment, thermistor adopts the PT100 platinum resistance, and the PT100 platinum resistance has precision height, the strong characteristics of shock resistance, is 100 Ω 0 ℃ of following resistance, and between 0 ℃～100 ℃, its resistance and temperature have corresponding relation according to a minute kilsyth basalt.According to the occasion accuracy requirement, can select the PT100 of different accuracy, the precision that adopts in the present embodiment is 0.5 grade.
As shown in Figure 3, temperature sensitive member 31 is electrically connected to temperature sensor circuit 30, and the temperature sensor circuit 30 in the cavity 20 comprises three resistance 32.These three resistance 32 and temperature-sensing element 31 connect and compose Wheatstone bridge, feed constant current source between the lead-in wire a of electric bridge and the lead-in wire d, lead-in wire b has linear corresponding relation with the voltage and the temperature of lead-in wire between the c, by this electric signal of sampling with the collection of realization to temperature.
For the sensor that temperature, pressure are combined, temperature sensor circuit 30 in the lead-in wire of temperature sensitive member 31 and the cavity be connected see also shown in Figure 4, getting out a through hole 13 on sonde body 10 walls communicates with cavity 20 parts, two connecting line 31a that drawn by the signal output part of temperature-sensing element 31 promptly arrive cavity 20 from mounting hole 11 via through hole 13, are connected with three resistance of temperature sensor circuit 30.Thereby make connecting line 31a walk around the fluid inlet and outlet of sonde body 10, avoided the interference of fluid temperature-sensing element 31.
As shown in Figure 5, pressure responsive element 41 is electrically connected to pressure sensor circuit 40, pressure sensor circuit 40 comprises many leads, each pressure responsive element 41 is made of force- sensing resistor 41a, 41b, 41c, 41d, and these many leads are interconnected to Wheatstone bridge with force- sensing resistor 41a, 41b, 41c, 41d.The characteristics that it has strong shock resistance are applicable to comparatively condition of severe of big inertia system, condition of work.Feed the 2mA constant current source between the lead-in wire 1 of electric bridge and the lead-in wire 4, lead-in wire 2 promptly becomes corresponding relation with pressure with the voltage that goes between between 3.Owing to many-sided reasons such as processing, may cause four force-sensing resistor imbalances, promptly because force- sensing resistor 41a, 41c and force-sensing resistor 41b, the ratio of 41d is unequal to be caused under the zero pressure, the lead-in wire 2 and lead-in wire 3 output voltages of electric bridge are non-vanishing, for this reason can be with the balance resistance (not shown) and a force-sensing resistor of constantan wire coiled, for example force-sensing resistor 41a is in series, make force- sensing resistor 41a, 41c and force- sensing resistor 41b, 41d is in equal proportions, thereby reach under the zero pressure situation, the resistance 41a of four brachium pontis, 41b, 41c, 41d is equal substantially, satisfies the accuracy requirement of sensor.Certainly other balance method for example utilizes an above force-sensing resistor in balance resistance and the electric bridge to be in series so that four force-sensing resistor resistances equate also to be fine, and the present invention does not limit the number of the force-sensing resistor of series connection balance resistance.When pressure change, corresponding deformation can take place with the variation of pressure in force-sensing resistor 41a, the 41b of four brachium pontis, 41c, 41d, thereby changes the equilibrium state of bridge circuit, and corresponding bridge arm voltage changes thereupon, realizes the collection to pressure.
Between the sonde body of temperature and pressure sensor and the cavity 20 heat insulating mattress 50 is set, is used for preventing the circuit board of temperature conduction, prevent that effectively the sampling temperature of circuit board from floating to cavity.Heat insulating mattress 50 can adopt polycarbonate as material, and this material good heat-insulation effect can not deform when temperature is lower than 270 ℃, and has higher intensity.
Claims (10)
1. temperature and pressure transmitter, it is characterized in that, comprise: a housing, described housing is made of a sonde body and a connected cavity, also comprises a temperature sensitive member, four pressure responsive element, a temperature sensor circuit and pressure sensor circuits; Described temperature sensor circuit and described pressure sensor circuit are arranged in the described cavity; Described sonde body one end face is provided with mounting hole, described temperature sensitive member is arranged on the described mounting hole, and be electrically connected to described temperature sensor circuit, also be interval with four fluid passing holes on the described end face of described sonde body, described pressure responsive element is separately positioned in the described fluid passing hole, and is electrically connected to described pressure sensor circuit.
2. temperature and pressure transmitter as claimed in claim 1 is characterized in that, described mounting hole is located at an end face center of described sonde body, and it is on the circumference in the center of circle that described four fluid passing holes are symmetrically set in described end face center.
3. temperature and pressure transmitter as claimed in claim 1 is characterized in that, described temperature sensor circuit comprises three resistance, and described three resistance and described temperature sensitive member connect and compose Wheatstone bridge.
4. temperature and pressure transmitter as claimed in claim 1, it is characterized in that, also be provided with a through hole on the one side wall of described sonde body, the lead-in wire of described temperature sensitive member passes described mounting hole and is connected with temperature sensor circuit in the described cavity via described through hole.
5. as claim 1 or 3 or 4 described temperature and pressure transmitter, it is characterized in that described temperature sensitive member is made of-thermistor.
6. temperature and pressure transmitter as claimed in claim 1 is characterized in that described pressure sensor circuit comprises many leads, so that described four pressure responsive element are interconnected to constitute Wheatstone bridge.
7. as claim 1 or 6 described temperature and pressure transmitter, it is characterized in that described pressure responsive element is made of force-sensing resistor.
8. as claim 1 or 6 described temperature and pressure transmitter, it is characterized in that described pressure sensor circuit also comprises at least one balance resistance, described balance resistance is connected with described pressure responsive element.
9. temperature and pressure transmitter as claimed in claim 1 is characterized in that, also comprises the heat insulating mattress that is arranged between described sonde body and the described cavity.
10. temperature and pressure transmitter as claimed in claim 9 is characterized in that, described heat insulating mattress material is a polycarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100308367A CN100374824C (en) | 2005-10-28 | 2005-10-28 | Temperature-pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100308367A CN100374824C (en) | 2005-10-28 | 2005-10-28 | Temperature-pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN1760642A CN1760642A (en) | 2006-04-19 |
| CN100374824C true CN100374824C (en) | 2008-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100308367A Expired - Fee Related CN100374824C (en) | 2005-10-28 | 2005-10-28 | Temperature-pressure sensor |
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| CN (1) | CN100374824C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231214B (en) * | 2008-01-29 | 2011-10-19 | 武汉理工大学 | Apparatus for testing and evaluating heat-filling and heat-discharging process of thermal storage device |
| CN102445601A (en) * | 2011-09-23 | 2012-05-09 | 中国船舶重工集团公司第七○七研究所 | Dynamic contact resistance testing device of conducting ring |
| CN102680007A (en) * | 2012-05-27 | 2012-09-19 | 上海航天能源股份有限公司 | Temperature and pressure all-in-one sensor for natural gas pipeline pressure maintaining tests |
| CN103808358B (en) * | 2012-11-13 | 2017-10-03 | 浙江盾安人工环境股份有限公司 | A kind of temperature, pressure integrated sensor |
| CN103983396B (en) * | 2014-05-22 | 2016-06-29 | 北京航天易联科技发展有限公司 | A kind of hammer sensor |
| CN111397776B (en) * | 2019-11-13 | 2022-01-11 | 中国科学院微电子研究所 | Temperature and pressure composite sensor |
| CN111896876B (en) * | 2020-08-10 | 2023-05-30 | 苏州建德一方能源科技有限公司 | Ag-C-PDMS temperature and pressure sensor for monitoring running state of lithium battery |
| CN115407891A (en) * | 2021-05-28 | 2022-11-29 | 华为技术有限公司 | Pressure detection module and electronic equipment |
| CN115388938A (en) * | 2022-07-13 | 2022-11-25 | 中列(武汉)科技有限公司 | Temperature and pressure sensor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219924A (en) * | 1995-02-16 | 1996-08-30 | Isuzu Motors Ltd | Adaptor for measuring hydraulic pressure and oil temperature |
| CN2259619Y (en) * | 1995-10-13 | 1997-08-13 | 同济大学 | Ultrasonic velocity difference flow meter |
| US5948989A (en) * | 1997-08-29 | 1999-09-07 | Mitsubishi Denki Kabushiki Kaisha | Pressure sensor device |
| CN1250873A (en) * | 1998-10-09 | 2000-04-19 | 山东矿业学院矿压研究所 | Method for measuring relative level of underground ventilation measuring point and its measuring instrument |
| CN1147712C (en) * | 1996-06-04 | 2004-04-28 | 迪特里奇技术控股公司 | Flow meter pitot tube with temp. sensor |
| JP2005274412A (en) * | 2004-03-25 | 2005-10-06 | Denso Corp | Temperature sensor integrated type pressure sensor device |
-
2005
- 2005-10-28 CN CNB2005100308367A patent/CN100374824C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219924A (en) * | 1995-02-16 | 1996-08-30 | Isuzu Motors Ltd | Adaptor for measuring hydraulic pressure and oil temperature |
| CN2259619Y (en) * | 1995-10-13 | 1997-08-13 | 同济大学 | Ultrasonic velocity difference flow meter |
| CN1147712C (en) * | 1996-06-04 | 2004-04-28 | 迪特里奇技术控股公司 | Flow meter pitot tube with temp. sensor |
| US5948989A (en) * | 1997-08-29 | 1999-09-07 | Mitsubishi Denki Kabushiki Kaisha | Pressure sensor device |
| CN1250873A (en) * | 1998-10-09 | 2000-04-19 | 山东矿业学院矿压研究所 | Method for measuring relative level of underground ventilation measuring point and its measuring instrument |
| JP2005274412A (en) * | 2004-03-25 | 2005-10-06 | Denso Corp | Temperature sensor integrated type pressure sensor device |
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| CN1760642A (en) | 2006-04-19 |
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Granted publication date: 20080312 Termination date: 20131028 |