CN201892592U - Modular circuit of pressure sensor - Google Patents
Modular circuit of pressure sensor Download PDFInfo
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- CN201892592U CN201892592U CN2010205196468U CN201020519646U CN201892592U CN 201892592 U CN201892592 U CN 201892592U CN 2010205196468 U CN2010205196468 U CN 2010205196468U CN 201020519646 U CN201020519646 U CN 201020519646U CN 201892592 U CN201892592 U CN 201892592U
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- pressure sensor
- converter
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- clock signal
- modular circuit
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- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036581 peripheral resistance Effects 0.000 description 1
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Abstract
The utility model discloses a modular circuit of a pressure sensor, which comprises a pressure sensor, an AD (analog-to-digital) converter, a communication interface and a memorizer for storing calibration parameters of the pressure sensor; a signal output end of the pressure sensor is connected with a signal input end of the AD converter; a signal output end of the AD converter is connected with the communication interface; and a data output end of the memorizer is connected with the communication interface. The modular circuit is additionally provided with the memorizer storing the calibration parameters of the pressure sensor based on the traditional circuit, and the memorizer can store the calibration parameters such as a characteristic parameter, a sensitivity coefficient and a temperature coefficient of the sensor. When the modular circuit of the pressure sensor works, an external controller reads out the calibration parameters in the memorizer, calculates the data output by the AD converter and obtains an accurate air pressure value and an accurate temperature value. Compared with the traditional modular circuit of the pressure sensor, the modular circuit of the utility model has high working precision and can calibrate without needing a method of adjusting resistance, the calibration is simple and convenient, and the production efficiency is high.
Description
[technical field]
The utility model relates to pressure transducer, relates in particular to a kind of pressure sensor module circuit.
[background technology]
Traditional pressure sensor module circuit comprises pressure transducer, AD conversion chip.The bridge arm circuit that sensor internal is made up of four piezoresistances, the resistance of resistance can change along with the change of temperature and air pressure.Sensor module circuitry commonly used needs to change the enlargement factor of differential amplifier circuit by regulating the resistance of peripheral resistance because there is error in sensor characteristic, makes output valve reach requirement.Traditional pressure sensor module need be taken out pressure one by one at production line, calibrates by the method for regulating resistance.The operation of calibration is loaded down with trivial details, and production efficiency is low; Sensor assembly precision by this method calibration is lower, presses calibration because take out at normal temperatures, and the pressure transducer mould is when the temperature environment work different with calibration condition, and error ratio is bigger.
[summary of the invention]
It is easy that the technical problems to be solved in the utility model provides a kind of calibration operation, production efficiency height, the pressure sensor module circuit that the sensor assembly operating accuracy is higher.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of pressure sensor module circuit, the storer that comprises pressure transducer, AD converter, communication interface and storage pressure transducer calibration parameter, the signal output part of pressure transducer connects the signal input part of AD converter, the signal output part of AD converter is connected the letter interface, and the data output end of described storer is connected the letter interface.
Described communication interface comprises data input and output pin and clock signal pin, and the data output pin of AD converter and the data input and output pin of storer are connected the data input and output pin of letter interface respectively; The clock signal pin of AD converter and the clock signal pin of storer are connected the clock signal pin of letter interface respectively.
Described communication interface comprises reset pin and master clock signal pin, and the reset pin of AD converter is connected the reset pin of letter interface; The master clock signal pin of AD converter is connected the master clock signal pin of letter interface.
Described storer is an eeprom memory.
The utility model pressure sensor module circuit has increased the storer of storage pressure transducer calibration parameter on the basis of traditional circuit, calibration parameters such as the characterisitic parameter that storer can storage sensor, sensitivity coefficient, temperature coefficient.During the pressure sensor module circuit working, peripheral control unit is read calibration parameter from storer, data to AD converter output are calculated, draw accurate atmospheric pressure value and temperature value, so the utility model is compared the operating accuracy height with traditional pressure sensor module circuit, need not to calibrate by the method for regulating resistance, calibration operation is easy, the production efficiency height.
[description of drawings]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the circuit theory diagrams of the utility model pressure sensor module circuit embodiments.
[embodiment]
In the utility model pressure sensor module circuit embodiments shown in Figure 1, the pressure sensor module circuit comprises the eeprom memory U3 of pressure transducer U2, AD converter U1, communication interface J1 and storage pressure transducer calibration parameter.
Communication interface J1 comprises data input and output pin SDA, clock signal pin SCLK, reset pin XCLR and master clock signal pin MCLK.
AD converter U1 comprises data output pin SDA, clock signal pin SCL, reset pin XCLR, master clock signal pin MCLK, signal input pin P1 and signal input pin N1.
Pressure transducer U2 comprises signal output pin VOUT-and VOUT+.
Eeprom memory U3 comprises data input and output pin SDA, clock signal pin SCL.
The signal output pin VOUT+ of pressure transducer U2 meets the signal input pin P1 of AD converter U1, and VOUT-meets the input pin N1 of AD converter U1.
The data output pin SDA of AD converter U1, clock signal pin SCL, reset pin XCLR, master clock signal pin MCLK connect data input and output pin SDA, clock signal pin SCLK, reset pin XCLR and the master clock signal pin MCLK of letter interface J1 respectively.
The data input and output pin SDA of eeprom memory U3, clock signal pin SCL connect data input and output pin SDA, the clock signal pin SCLK of letter interface J1 respectively.
Eeprom memory U3 writes the pressure transducer calibration parameter by communication interface J1 when calibrating, calibration parameter comprises characterisitic parameter, sensitivity coefficient, temperature coefficient of sensor etc.During the pressure sensor module circuit working, peripheral control unit is read calibration parameter from storer, data to AD converter output are calculated, just can draw accurate atmospheric pressure value and temperature value, present embodiment is compared the operating accuracy height with traditional pressure sensor module circuit, and need not to calibrate by the method for regulating resistance, calibration operation is easy, the production efficiency height.
Claims (4)
1. pressure sensor module circuit, comprise pressure transducer, AD converter and communication interface, it is characterized in that, the storer that comprises storage pressure transducer calibration parameter, the signal output part of pressure transducer connects the signal input part of AD converter, the signal output part of AD converter is connected the letter interface, and the data output end of described storer is connected the letter interface.
2. pressure sensor module circuit according to claim 1, it is characterized in that, described communication interface comprises data input and output pin and clock signal pin, and the data output pin of AD converter and the data input and output pin of storer are connected the data input and output pin of letter interface respectively; The clock signal pin of AD converter and the clock signal pin of storer are connected the clock signal pin of letter interface respectively.
3. pressure sensor module circuit according to claim 2 is characterized in that, described communication interface comprises reset pin and master clock signal pin, and the reset pin of AD converter is connected the reset pin of letter interface; The master clock signal pin of AD converter is connected the master clock signal pin of letter interface.
4. according to the described pressure sensor module circuit of arbitrary claim in the claim 1 to 3, it is characterized in that described storer is an eeprom memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205196468U CN201892592U (en) | 2010-09-07 | 2010-09-07 | Modular circuit of pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205196468U CN201892592U (en) | 2010-09-07 | 2010-09-07 | Modular circuit of pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201892592U true CN201892592U (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205196468U Expired - Fee Related CN201892592U (en) | 2010-09-07 | 2010-09-07 | Modular circuit of pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201892592U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471638A (en) * | 2013-08-19 | 2013-12-25 | 无锡合普瑞传感科技有限公司 | Sensor and detection circuit |
| CN103471565A (en) * | 2013-08-19 | 2013-12-25 | 无锡合普瑞传感科技有限公司 | Sensor and detection circuit |
| CN105258847A (en) * | 2015-10-08 | 2016-01-20 | 歌尔声学股份有限公司 | Method and device for calibrating pressure sensor |
| WO2017107597A1 (en) * | 2015-12-23 | 2017-06-29 | 努比亚技术有限公司 | Sensitivity calibrating method, device, mobile terminal and storage medium |
-
2010
- 2010-09-07 CN CN2010205196468U patent/CN201892592U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471638A (en) * | 2013-08-19 | 2013-12-25 | 无锡合普瑞传感科技有限公司 | Sensor and detection circuit |
| CN103471565A (en) * | 2013-08-19 | 2013-12-25 | 无锡合普瑞传感科技有限公司 | Sensor and detection circuit |
| CN105258847A (en) * | 2015-10-08 | 2016-01-20 | 歌尔声学股份有限公司 | Method and device for calibrating pressure sensor |
| CN105258847B (en) * | 2015-10-08 | 2018-12-25 | 歌尔股份有限公司 | A kind of method and apparatus of pressure sensor calibration |
| WO2017107597A1 (en) * | 2015-12-23 | 2017-06-29 | 努比亚技术有限公司 | Sensitivity calibrating method, device, mobile terminal and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20170907 |
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| CF01 | Termination of patent right due to non-payment of annual fee |