CN201765077U - Compensation circuit board type pressure transmitter - Google Patents
Compensation circuit board type pressure transmitter Download PDFInfo
- Publication number
- CN201765077U CN201765077U CN201020250017XU CN201020250017U CN201765077U CN 201765077 U CN201765077 U CN 201765077U CN 201020250017X U CN201020250017X U CN 201020250017XU CN 201020250017 U CN201020250017 U CN 201020250017U CN 201765077 U CN201765077 U CN 201765077U
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- Prior art keywords
- pressure
- board
- circuit board
- sensor
- pressure transmitter
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Abstract
The utility model relates to a pressure transmitter, in particular to a compensation circuit board type pressure transmitter, which comprises a pressure sensor, and is characterized in that the pressure sensor is sequentially connected with a voltage correction circuit and an output circuit, and the voltage correction circuit further connected with a power supply is an analog sensor signal processor. The transmitter with excellent performances enables MAX 1452 working characteristics to be similar to inherent repeatability of the sensor, is wide in temperature correction range, and supports correction of as many as 114 temperature spots within the range between -40 DEG C and +125 DEG C.
Description
Technical field
The utility model relates to a kind of pressure unit, the board-like pressure unit of particularly a kind of compensated line.
Background technology
Pressure unit is the important original paper that changes in order to control industrial process and pressure in many commercial units.Most of pressure units adopt the structure of " pressure measuring element-measurement change-over circuit-process web member ", the direct contact measurement medium of pressure measuring element, resistance bridge in the pressure transducer touches external pressure, resistance is corresponding to change, sensor output mV signal, the size of output signal is directly proportional with the pressure size.The mV signal of output becomes the output of standard 4～20mA signal through measuring change-over circuit.
Yet because sensor itself and the influenced temperature effect of wiring board are bigger, when device heating, heat radiation and transmitter environment for use temperature variation were big, the output earth signal often had greatly changed, and can not reflect correct force value.
Summary of the invention
The utility model using compensation wiring board is made transmitter, can effectively overcome the influence of temperature to sensor, has improved the influence to sensor itself of the precision of pressure unit and temperature greatly.
The following technical scheme of the concrete employing of the utility model:
The board-like pressure unit of a kind of compensated line comprises pressure transducer, it is characterized in that, described pressure transducer is connected with output module by the correction module, and the correction module connects power supply; Described correction module is the analog sensor signal processor.
Described correction module adopts the circuit board and chip of MAX1452 model; Described power supply adopts MAX6105 model chip; Described pressure transducer is a diffusion silicon pressure sensor.
MAX1452 circuit board and chip circuit has amplification, calibration and temperature compensation function, but its synthetic operation characteristic can approach sensor intrinsic reproducibility, and utilize 16 integrated figure place weighted-voltage D/A converters to realize that digitizing proofreaies and correct.Side-play amount and span can be proofreaied and correct within ± 0.02% full scale.
Described power supply adopts 24V constant pressure source power supply mode.
The utility model has the advantages that:
1) superior performance, but the MAX1452 operating characteristic can approach sensor intrinsic reproducibility;
2) temperature correction scope is big, supports the nearly calibration of 114 temperature spots in-40 ℃ to+125 ℃ scopes.
3) MAX1452 utilizes the temperature coefficient of side-play amount and span temperature coefficient that unique temperature compensation is provided, and has reduced cost again when improving dirigibility.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model.
Embodiment
As shown in Figure 1, the board-like pressure unit of a kind of compensated line comprises pressure transducer, and described pressure transducer connects voltage correction circuit and output circuit successively, and voltage correction circuit also is connected with power supply; Described voltage correction circuit is the analog sensor signal processor.
Preferred version: voltage correction circuit is a MAX1452 circuit board and chip circuit, and power supply is the MAX6105 circuit, and described pressure transducer is a diffusion silicon pressure sensor.
Claims (4)
1. the board-like pressure unit of compensated line comprises pressure transducer, it is characterized in that described pressure transducer is connected with output module by the correction module, and the correction module connects power supply; Described correction module is the analog sensor signal processor.
2. the board-like pressure unit of compensated line according to claim 1 is characterized in that, described correction module adopts the circuit board and chip of MAX1452 model.
3. the board-like pressure unit of compensated line according to claim 1 is characterized in that, described power supply adopts MAX6105 model chip.
4. the board-like pressure unit of compensated line according to claim 1 is characterized in that described pressure transducer is a diffusion silicon pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020250017XU CN201765077U (en) | 2010-07-07 | 2010-07-07 | Compensation circuit board type pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020250017XU CN201765077U (en) | 2010-07-07 | 2010-07-07 | Compensation circuit board type pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201765077U true CN201765077U (en) | 2011-03-16 |
Family
ID=43717686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020250017XU Expired - Fee Related CN201765077U (en) | 2010-07-07 | 2010-07-07 | Compensation circuit board type pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201765077U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539062A (en) * | 2011-12-29 | 2012-07-04 | 中国燃气涡轮研究院 | Sensor temperature drift compensation method and pressure sensor box |
-
2010
- 2010-07-07 CN CN201020250017XU patent/CN201765077U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539062A (en) * | 2011-12-29 | 2012-07-04 | 中国燃气涡轮研究院 | Sensor temperature drift compensation method and pressure sensor box |
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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: 20110316 Termination date: 20130707 |