CN202092821U - Intrinsic safe digital pressure transducer - Google Patents
Intrinsic safe digital pressure transducer Download PDFInfo
- Publication number
- CN202092821U CN202092821U CN2011202040522U CN201120204052U CN202092821U CN 202092821 U CN202092821 U CN 202092821U CN 2011202040522 U CN2011202040522 U CN 2011202040522U CN 201120204052 U CN201120204052 U CN 201120204052U CN 202092821 U CN202092821 U CN 202092821U
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- China
- Prior art keywords
- pressure transducer
- temperature
- wiring board
- pressure
- top cover
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- Expired - Lifetime
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Abstract
The utility model relates to a digital pressure transducer for measuring fluid pressure, and especially relates to an intrinsic safe digital pressure transducer. The intrinsic safe digital pressure transducer comprises a housing and a top cover. A pressure transducer probe and a circuit board are disposed in a cavity formed by the housing and the top cover. The circuit board comprises a power supply circuit, a signal amplifier, an analog-to-digital converter, a microprocessor and a communication interface. The intrinsic safe digital pressure transducer is characterized in that a temperature transducer is arranged between the pressure transducer probe and the circuit board in the cavity, and the temperature transducer is connected with the microprocessor. According to the utility model, the temperature transducer is integrated into the pressure transducer to actually measure temperature signals of the pressure transducer, so that pressure signals are corrected automatically and the measuring precision for the pressure transducer is improved.
Description
Technical field
The utility model relates to a kind of digital pressure sensor of measuring fluid pressure, especially a kind of intrinsic safety type digital pressure sensor.
Background technology
The effect of pressure transducer is mainly used in the pressure size that detects various fluids.Be widely used in fields such as industrial processes, energy measurement, environmental engineering, communications and transportation, biotechnology, scientific experiments.In actual applications, can be divided into the pressure transducer of various difference in functionalitys according to principle, application etc.
In the existing pressure transducer, integrated temperature sensor does not possess in the big occasion of range of temperature and guarantees tonometric degree of accuracy.The defective that exists: 1, do not have little power consumption serial digital communication interface.2, not well sealing of sensor internal is subjected to the corrosive effect reliability of environment easily and influences use at explosion-proof environment.3, when high temperature and low temperature, do not have the temperature zero offset capability in the pressure transducer, be easy to generate bigger error.
The utility model content
In order not have temperature zero offset capability and sensor internal not have the well defective of sealing existence in the pressure transducer when high temperature and the low temperature that overcomes that existing pressure transducer exists, the utility model provides a kind of intrinsic safety type digital pressure sensor to revise automatically pressure under different temperature, obtains accurate measured value; The intrinsic safety type digital pressure sensor that can use in dangerous place of a kind of little power consumption serial digital communication interface and insulation filling material sealing is provided.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of intrinsic safety type digital pressure sensor, comprise housing and top cover, in the cavity volume of housing and top cover formation, be provided with pressure transducer probe and wiring board, described wiring board comprises power circuit, signal amplifier, analog to digital converter, microprocessor, communication interface, it is characterized in that: also be provided with temperature sensor in the described cavity volume and between pressure transducer probe and wiring board, described temperature sensor is connected with microprocessor.
As preferred version of the present utility model, described top cover upper end is provided with power supply and is connected with wiring board with the serial digital signal output cable.
As the further preferred version of the utility model, the outside of described wiring board and temperature sensor is provided with the insulated enclosure packed layer.
The utlity model has following beneficial effect: temperature sensor is integrated in the pressure transducer, the temperature value of observed pressure sensor, thus pressure signal is revised automatically, improved the measuring accuracy of pressure signal when temperature variation.
Description of drawings
Fig. 1 is the structural representation of the embodiment of a kind of intrinsic safety type digital pressure sensor of the utility model.
Fig. 2 is the schematic block circuit diagram of the embodiment of a kind of intrinsic safety type digital pressure sensor of the utility model.
Among the figure, 1 housing, 2 pressure transducers, 3 wiring boards, 4 temperature sensors, 5 top covers, 6 water-proof cable joints, 7 power supplys and serial signal output cable, 8 insulated enclosure packed layers.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
By shown in Figure 1, a kind of intrinsic safety type digital pressure sensor, comprise housing and top cover, in the cavity volume of housing 1 and top cover 5 formation, be provided with pressure transducer probe 2 and wiring board 3, described wiring board 3 comprises power circuit D4, signal amplifier D2, analog to digital converter D3, microprocessor D1, communication interface: also be provided with temperature sensor 4 in the described cavity volume and between pressure transducer probe 2 and wiring board 3, described temperature sensor 4 is connected with microprocessor D1.Temperature sensor is integrated in the pressure transducer, the temperature value of observed pressure sensor, thus pressure signal is revised automatically, improved the measuring accuracy of pressure signal when temperature variation.
In the present embodiment, described top cover upper end is provided with power supply and is connected with wiring board 3 with serial digital signal output cable 7.Because the utility model provides a kind of little power consumption serial digital communication interface, can long-term work under battery powered situation, serial digital communication has improved antijamming capability
In the diagram, the outside of described wiring board 3 and temperature sensor 4 is provided with insulated enclosure packed layer 8.Realize protection by packed layer to wiring board and temperature sensor, thus can be under rugged surroundings and the hazardous area work of requirement of explosion proof be arranged.
By shown in Figure 2, power supply D4, digital pressure sensor are made up of pressure transducer core body, instrument amplifier D2, analog to digital converter (A/D) D3, microprocessor D1, need temperature sensor S2 according to wide temperature compensation.
Power supply D4 mainly is for digital pressure sensor provides power supply, can be also constant current chip of voltage stabilizing chip, can control its switch by microprocessor D1 when needing, to realize the power saving purpose.
The pressure transducer core body can be the pressure transducer of diffuse si piezoresistive pressure sensor or other form, output voltage signal under the excitation of constant current or constant voltage, through instrument amplifier D2 processing and amplifying, voltage signal after output is amplified carries out the analog to digital conversion to AD converter D3, read digital value behind the AD by microprocessor D1 again, and obtain being added in the force value on the pressure transducer core body after the computing.
The communication interface serial digital communication of digital pressure sensor, serial port module by microprocessor D1 realizes, communication interface mainly is responsible for the exchanges data with other intelligence instrument or computing machine, avoids traditional pressure unit or only with the signal transmission error of the pressure transducer of simulating signal output.
S2 can be PT temperature and resistance or conductor temperature chip, realize the detection of the environment temperature of pressure transducer core body, and read its temperature value and carry out the data analysis processing, realize wide temperature compensation by microprocessor, reduce the influence of temperature, improve the pressure detection precision pressure detection.
Claims (3)
1. intrinsic safety type digital pressure sensor, comprise housing and top cover, in the cavity volume of housing and top cover formation, be provided with pressure transducer probe and wiring board, described wiring board comprises power circuit, signal amplifier, analog to digital converter, microprocessor, communication interface, it is characterized in that: also be provided with temperature sensor in the described cavity volume and between pressure transducer probe and wiring board, described temperature sensor is connected with microprocessor.
2. intrinsic safety type digital pressure sensor according to claim 1 is characterized in that: described top cover upper end is provided with power supply and is connected with wiring board with the serial digital signal output cable.
3. intrinsic safety type digital pressure sensor according to claim 1 and 2 is characterized in that: the outside of described wiring board and temperature sensor is provided with the insulated enclosure packed layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202040522U CN202092821U (en) | 2011-06-16 | 2011-06-16 | Intrinsic safe digital pressure transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202040522U CN202092821U (en) | 2011-06-16 | 2011-06-16 | Intrinsic safe digital pressure transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202092821U true CN202092821U (en) | 2011-12-28 |
Family
ID=45367882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202040522U Expired - Lifetime CN202092821U (en) | 2011-06-16 | 2011-06-16 | Intrinsic safe digital pressure transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202092821U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519666A (en) * | 2011-12-29 | 2012-06-27 | 中国燃气涡轮研究院 | Digital temperature compensation system and method |
| CN104897111A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Embedded type strain gauge |
| CN104897112A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Novel concrete strain gauge |
| CN104897324A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Concrete strain gauge |
| CN104897113A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Strain gauge |
| CN104897323A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Novel strain gauge |
| CN107741296A (en) * | 2017-11-17 | 2018-02-27 | 天信仪表集团有限公司 | A kind of pressure sensor automatic debugging device with electric Proportion valve |
| CN109186816A (en) * | 2018-10-24 | 2019-01-11 | 中北大学 | A kind of microminiature digital pressure sensor |
| CN109238524A (en) * | 2018-08-28 | 2019-01-18 | 西安航天动力研究所 | Wide warm area high-precision sputtered thin film pressure transducer and preparation method thereof |
| CN110333028A (en) * | 2019-08-06 | 2019-10-15 | 中北大学 | Pressure parameter real time on-line monitoring system under a kind of particular surroundings |
-
2011
- 2011-06-16 CN CN2011202040522U patent/CN202092821U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519666A (en) * | 2011-12-29 | 2012-06-27 | 中国燃气涡轮研究院 | Digital temperature compensation system and method |
| CN104897111A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Embedded type strain gauge |
| CN104897112A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Novel concrete strain gauge |
| CN104897324A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Concrete strain gauge |
| CN104897113A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Strain gauge |
| CN104897323A (en) * | 2014-10-05 | 2015-09-09 | 安徽贝莱电子科技有限公司 | Novel strain gauge |
| CN107741296A (en) * | 2017-11-17 | 2018-02-27 | 天信仪表集团有限公司 | A kind of pressure sensor automatic debugging device with electric Proportion valve |
| CN107741296B (en) * | 2017-11-17 | 2024-01-19 | 天信仪表集团有限公司 | Automatic pressure sensor debugging device with electric proportional valve |
| CN109238524A (en) * | 2018-08-28 | 2019-01-18 | 西安航天动力研究所 | Wide warm area high-precision sputtered thin film pressure transducer and preparation method thereof |
| CN109186816A (en) * | 2018-10-24 | 2019-01-11 | 中北大学 | A kind of microminiature digital pressure sensor |
| CN110333028A (en) * | 2019-08-06 | 2019-10-15 | 中北大学 | Pressure parameter real time on-line monitoring system under a kind of particular surroundings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |