CN201673011U - Digital compensation pressure transmitter - Google Patents
Digital compensation pressure transmitter Download PDFInfo
- Publication number
- CN201673011U CN201673011U CN2010201823770U CN201020182377U CN201673011U CN 201673011 U CN201673011 U CN 201673011U CN 2010201823770 U CN2010201823770 U CN 2010201823770U CN 201020182377 U CN201020182377 U CN 201020182377U CN 201673011 U CN201673011 U CN 201673011U
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- sensor signal
- digital sensor
- signal circuit
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- Measuring Fluid Pressure (AREA)
Abstract
Provided is a digital compensation pressure transmitter, which has a pressure sensor, a digital sensor signal circuit, a power supply management circuit, a signal processing circuit and a digital interface; the output terminal of the pressure sensor is connected with an input terminal of the digital sensor signal circuit; the output terminal of the power supply management circuit is connected with another input terminal of the digital sensor signal circuit; one output terminal of the digital sensor signal circuit is connected with the input terminal of the signal processing circuit; another output terminal of the digital sensor signal circuit is connected with the input terminal of the digital interface circuit. The transmitter of the utility model eliminates the influence to the output of the transmitter caused by the variation of the external environment temperature by using digital compensation technology; regulates the zero point and full range signal by digital interface; meets various outputs; changes the conventional artificial regulation mode to zero point and full range by screwdriver; and realizes automation, batch and large scale production.
Description
Technical field
The utility model relates to a kind of digital compensation pressure unit, is widely used in Industry Control, flow measurement, and medical apparatus, aerodynamic force is measured, medical apparatus, aerodynamic force is measured, fields such as hydraulic pressure, pneumatic equipment.
Background technology
State, inside and outside compensation method at present to sensor adopt the mimic channel compensation more and in intelligent chip or microcomputer the method with software realize compensation.Wherein the method for analog compensation has: string and constant electric-resistivity method on brachium pontis; Brachium pontis thermistor method; Bridge is gone up the electric-resistivity method of string and temperature-sensitive outward; Double bridge compensation techniques etc. such as use mimic channel to proofread and correct to have circuit complexity, debug difficulties, precision is low, versatility is poor, efficient is low at shortcoming; Software compensation is that microprocessor and pressure transducer are combined, make full use of abundant software function, the additive error of sensor temperature revised in conjunction with certain backoff algorithm, the effect of software compensation is better than analog compensation, the precision that reaches is higher, but the hardware cost height, the production technology relative complex.
The utility model content
The technical matters that the utility model solves: a kind of digital compensation pressure unit is provided; except performance with general simulated pressure transmitter; utilize the digital compensation technology to eliminate because the variation of the ambient temperature influence that output produces to transmitter; utilize the zero point of digital interface to transmitter; the full scale signal is regulated; satisfy multiple output; change traditional screwdriver regulator potentiometer that manually utilizes and realized zero point; the regulative mode of full scale; it is low to have solved the Traditional Transmitters precision; production efficiency is low; problems such as cost height have realized the transmitter robotization; mass; large-scale production.
The technical solution adopted in the utility model: digital compensation pressure unit, has pressure transducer, the digital sensor signal circuit, electric power management circuit, signal processing circuit and digital interface circuit, an input end of the output termination digital sensor signal circuit of described pressure transducer, another input end of the output termination digital sensor signal circuit of electric power management circuit, the input end of an output termination signal processing circuit of digital sensor signal circuit, the input end of another output termination digital interface circuit of digital sensor signal circuit.
The utility model advantage compared with prior art:
1, simple in structure, cost is low, have simulation, PWM, I2C, output format for numbers such as SPI;
2, the zero point of transmitter, full scale can be regulated by digital interface;
3, can the temperature of sensor be compensated, linearity is carried out three rank and is revised;
4, utilize digital interface can change traditional transmitter production model, realized transmitter robotization, mass, large-scale production;
5, applied widely, be widely used in Industry Control, flow measurement, medical apparatus, aerodynamic force is measured, medical apparatus, aerodynamic force is measured, fields such as hydraulic pressure, pneumatic equipment.
The utility model has well solved in the sensor temperature compensation because the influence that output brings to transmitter greatly of environment temperature and medium temperature deviation; can be used on the occasion that precision, cost etc. is had higher requirements, realized mass, requirement of massive production.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is the schematic diagram of the utility model robotization, mass production.
Embodiment
Below in conjunction with accompanying drawing 1,2 a kind of embodiment of the present utility model is described.
The digital compensation pressure unit, have pressure transducer 1, digital sensor signal circuit 2, electric power management circuit 3, signal processing circuit 4 and digital interface circuit 5, an input end of the output termination digital sensor signal circuit 2 of pressure transducer 1, another input end of the output termination digital sensor signal circuit 2 of electric power management circuit 3, the input end of an output termination signal processing circuit 4 of digital sensor signal circuit 2, the input end of another output termination digital interface circuit 5 of digital sensor signal circuit 2.
As shown in Figure 1, the utility model comprises pressure transducer 1, signal processing circuit 4, electric power management circuit 3 and digital interface circuit 5, wherein, 1 output signal of pressure transducer is amplified through digital sensor signal circuit 2, the linear correction, temperature compensation and numeral output, signal after the amplification is converted to 4 ~ 20mA standard signal or voltage signal through signal processing circuit 4, electric power management circuit 3 provides wide service area for digital sensor signal circuit 2, and digital interface circuit 5 utilizes the digital function of digital sensor signal circuit 2 to be automated debug, compensation provides digital interface.
Fig. 2 is the robotization of digital compensation pressure unit; mass; the schematic diagram of large-scale production; wherein; PC 6 sends instruction by serial ports; RS232-RS485 converter 7 is converted into the RS485 bus signals with the RS232 rs 232 serial interface signal; by terminal block 8 instruction is communicated to each communication test module 9; communication test module 9 is given instruction each digital sensor signal circuit 2 again; digital sensor signal circuit 2 carries out signal condition to each pressure transducer 1 again; finish temperature compensation by the mode of 485 buses to 96 road transmitters; the linear correction; the calibration of zero point and full scale has realized the robotization of transmitter; mass production.
Claims (1)
1. digital compensation pressure unit, has pressure transducer (1), digital sensor signal circuit (2), electric power management circuit (3), signal processing circuit (4) and digital interface circuit (5), it is characterized in that: an input end of the output termination digital sensor signal circuit (2) of described pressure transducer (1), another input end of the output termination digital sensor signal circuit (2) of electric power management circuit (3), the input end of an output termination signal processing circuit (4) of digital sensor signal circuit (2), the input end of another output termination digital interface circuit (5) of digital sensor signal circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201823770U CN201673011U (en) | 2010-04-29 | 2010-04-29 | Digital compensation pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201823770U CN201673011U (en) | 2010-04-29 | 2010-04-29 | Digital compensation pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201673011U true CN201673011U (en) | 2010-12-15 |
Family
ID=43330423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201823770U Expired - Fee Related CN201673011U (en) | 2010-04-29 | 2010-04-29 | Digital compensation pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201673011U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980715A (en) * | 2012-11-16 | 2013-03-20 | 上海朝辉压力仪器有限公司 | Capacitance pressure transmitter and pressure sensing system |
| CN108246104A (en) * | 2017-12-30 | 2018-07-06 | 利穗科技(苏州)有限公司 | Digitize ultrafiltration system and method |
-
2010
- 2010-04-29 CN CN2010201823770U patent/CN201673011U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980715A (en) * | 2012-11-16 | 2013-03-20 | 上海朝辉压力仪器有限公司 | Capacitance pressure transmitter and pressure sensing system |
| CN102980715B (en) * | 2012-11-16 | 2015-12-30 | 上海朝辉压力仪器有限公司 | Capacitance pressure transmitter and pressure capsule system |
| CN108246104A (en) * | 2017-12-30 | 2018-07-06 | 利穗科技(苏州)有限公司 | Digitize ultrafiltration system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20140429 |