CN203672558U - Pressure sensor testing device - Google Patents

Pressure sensor testing device Download PDF

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Publication number
CN203672558U
CN203672558U CN201420024891.XU CN201420024891U CN203672558U CN 203672558 U CN203672558 U CN 203672558U CN 201420024891 U CN201420024891 U CN 201420024891U CN 203672558 U CN203672558 U CN 203672558U
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CN
China
Prior art keywords
pressure sensor
way connection
connected
data acquisition
air pump
Prior art date
Application number
CN201420024891.XU
Other languages
Chinese (zh)
Inventor
崔海坡
李哲龙
周勋
廖跃华
沈力行
尚昆
Original Assignee
上海理工大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 上海理工大学 filed Critical 上海理工大学
Priority to CN201420024891.XU priority Critical patent/CN203672558U/en
Application granted granted Critical
Publication of CN203672558U publication Critical patent/CN203672558U/en

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Abstract

Disclosed is a pressure sensor testing device. The pressure sensor testing device comprises a host computer, a data acquisition system, a signal conditioning circuit, a power supply circuit, a precision pressure sensor, a to-be-tested pressure sensor, an air pump, a four-way connection, a three-way connection and a gas storage tank. The data acquisition system is in bidirectional communication connection with the host computer; the signal conditioning circuit is in bidirectional communication connection with the data acquisition system; the power supply circuit is respectively electrically connected with the air pump and the signal conditioning circuit; the precision pressure sensor, the to-be-tested pressure sensor and the air pump are respectively in telecommunication connection with the signal conditioning circuit; the air pump, the precision pressure sensor and the to-be-tested pressure sensor are also respectively connected with the four-way connection through an air passage; the other interface of the four-way connection is connected with the three-way connection; and the other interface of the three-way connection is connected with the gas storage tank. The pressure sensor testing device has the advantages of simple and economic structure, convenient operation and accurate test result, is suitable for performance testing of a pressure sensor, and provides a basis for system design, component type selection and product detection.

Description

Pressure transducer proving installation

Technical field

The utility model relates to a kind of proving installation, particularly a kind of pressure transducer proving installation.

Background technology

Pressure transducer is the sensor that pressure is converted to electric signal output, is a kind of electric control device.Pressure transducer also has a lot of factor impacts in test, first two kinds of pressure that are measured medium pass into high and low two pressure chambers, low-pressure chamber pressure adopts atmospheric pressure or vacuum, act on the both sides isolation diaphragm of δ element (being sensitive element), be sent to measuring diaphragm both sides by the filling liquid in spacer and element.Pressure transducer respectively forms a capacitor by the electrode on measuring diaphragm and both sides insulating trip.In the time that pressure at both sides is inconsistent, cause measuring diaphragm to produce displacement, its displacement and pressure differential are directly proportional, therefore both sides electric capacity is not just etc., by vibration and demodulation link, convert the signal being directly proportional with pressure to.

Pressure transducer will reach accuracy requirement, just need to detect accurately, pressure source that must standard, give cell pressure to be measured, according to the variable quantity of the size of pressure and output signal, sensor to be measured is calibrated, adopted the precision pressure sensor value of measuring as pressure source, calibrate testing pressure sensor by software algorithm.

Precision pressure sensor is used for measuring testing pressure sensor, is very rationally useful test, can reflect truly, accurately the measuring accuracy of testing pressure sensor, for system, parts type selecting, properties of product detection provide certain foundation.

Utility model content

The purpose of this utility model, is just to address the above problem, and a kind of pressure transducer proving installation is provided.

The purpose of this utility model is achieved in that a kind of pressure transducer proving installation, comprises host computer, data acquisition system (DAS), signal conditioning circuit, power circuit, precision pressure sensor, testing pressure sensor, air pump, four-way connection, three-way connection and gas-holder; Data acquisition system (DAS) is connected with host computer two-way communication, signal conditioning circuit is connected with data acquisition system (DAS) two-way communication, power circuit is electrically connected with air pump and signal conditioning circuit respectively, precision pressure sensor, testing pressure sensor and air pump telecom-connect with signal conditioning circuit respectively, air pump, precision pressure sensor and testing pressure sensor are also connected with four-way connection by gas circuit respectively, another interface of four-way connection is connected with three-way connection, and another interface of three-way connection is connected with gas-holder.

Described host computer connects or pci bus connection with adopting serial ports connection, usb bus being connected of data acquisition system (DAS).

Described data acquisition system (DAS) has analog input AD, analog output DA, digital quantity input DI and digital output DO function.

It is simple in structure, economical, easy to operate that utility model has, and test result is feature accurately, is applicable to the performance test of pressure transducer, for system, parts type selecting, product detection provide foundation.

Brief description of the drawings

Fig. 1 is the electrical structure schematic diagram of the utility model pressure transducer proving installation;

Fig. 2 is pneumatic circuit schematic diagram of the present utility model;

Fig. 3 is the working routine process flow diagram of the utility model device.

Embodiment

Referring to Fig. 1, Fig. 2, the utility model pressure transducer proving installation, comprises host computer 1, data acquisition system (DAS) 2, signal conditioning circuit 3, power circuit 4, precision pressure sensor 5, testing pressure sensor 6, air pump 7, four-way connection 8, three-way connection 9 and gas-holder 10.Wherein, data acquisition system (DAS) 2 is connected with host computer 1 two-way communication, signal conditioning circuit 3 is connected with data acquisition system (DAS) 2 two-way communications, power circuit 4 is electrically connected with air pump 7 and signal conditioning circuit 3 respectively, precision pressure sensor 5, testing pressure sensor 6 and air pump 7 telecom-connect with signal conditioning circuit 3 respectively, air pump 7, precision pressure sensor 5 and testing pressure sensor 6 are also connected with four-way connection 8 by gas circuit respectively, another interface of four-way connection 8 is connected with three-way connection 9, and another interface of three-way connection 9 is connected with gas-holder 10.

Host computer 1 in the utility model outwards transmits control signal by data acquisition system (DAS) 2, control air pump and precision pressure sensor 5 through signal conditioning circuit 3, precision pressure sensor 5 and testing pressure sensor 6 send pressure feedback signal simultaneously, feed back to host computer 1 by signal conditioning circuit 3, data acquisition system (DAS) again, host computer 1 is processed to the received signal, thereby judge the performance of testing pressure sensor, calculating pressure value, result is mutual by man-machine interface and operator, and data are preserved.

Data acquisition system (DAS) 2 in the utility model, can export the control signal of host computer 1 to precision pressure sensor 5, air pump 7 by digital DO mouth, control their break-make, also the pressure feedback signal of sophisticated sensor 5 can be changed and inputed to host computer PC l by AD by digital DI mouth, testing pressure sensor 6.

Signal conditioning circuit 3 in the utility model has the function of signal Isolation.

Host computer in the utility model connects or pci bus connection with adopting serial ports connection, usb bus being connected of data acquisition system (DAS).

Data acquisition system (DAS) in the utility model has analog input AD, analog output DA, digital quantity input DI and digital output DO function.

Power circuit 4 input powers in the utility model are industrial-frequency alternating current 220V50Hz, by transformation and rectification, output 220V/50Hz and 110V/60Hz alternating voltage, be applicable to the air pump of different operating voltage, and output 24V, 12V, 5V DC voltage, for data acquisition acquisition system 2, signal conditioning circuit 3, precision pressure sensor 5, testing pressure sensor 6, air pump 7 provide working power.

Fig. 3 is the working routine process flow diagram of the utility model device, the course of work of the present utility model is: after system powers on, select start button, enter into test page, booster air pump device, choose range and check point, precision pressure sensor and testing pressure sensor gather pressure signal simultaneously, and show two groups of force value in upper computer end.All check points draw deviation, fit slope and the error of testing pressure pick up calibration straight line by software algorithm after having surveyed.The utility model utilizes the pressure of air pump generation as input quantity, the gas pressure value of input testing pressure sensor and precision pressure sensor, reference value using precision pressure sensor as corresponding true value (actual have error), carries out gas pressure data collection.Because each time gathering exists error, therefore need first the canonical parameter of the output quantity of two sensors and input to be carried out to linear interpolation, thereby can obtain a series of calibration data or curve.The utility model adopts the Polynomial curve-fit form in linear interpolation to set some selectable ranges, and as required, pressure transducer gamut (measurement range) is divided into some equidistant, obtain one group of canonical parameter data, the value of testing pressure sensor is set as to x, the value of precision pressure sensor is set as y, for each parameter, the simultaneously dynamic real-time data collection of precision pressure sensor and testing pressure sensor, and record respectively the output valve of two pressure transducers corresponding with each input value, then adopt quadratic polynomial fitting formula that x and y are fitted to a curve, can obtain the approximating function curvilinear equation using error minimum principle as " optimum " standard construction, then using the canonical parameter data of setting as new x, draw its a series of p (x) value, it is carried out to fitting a straight line with the respective standard parameter point y (x) drawing from target equation y (x)=x, thereby can obtain the deviation of testing pressure pick up calibration straight line, fit slope and error.Thereby judge whether, in the critical field of setting, as in the critical field of setting, to judge that testing pressure sensor accuracy meets the requirements, otherwise, judge that testing pressure sensor accuracy is undesirable.

Claims (3)

1. a pressure transducer proving installation, is characterized in that: comprise host computer, data acquisition system (DAS), signal conditioning circuit, power circuit, precision pressure sensor, testing pressure sensor, air pump, four-way connection, three-way connection and gas-holder; Data acquisition system (DAS) is connected with host computer two-way communication, signal conditioning circuit is connected with data acquisition system (DAS) two-way communication, power circuit is electrically connected with air pump and signal conditioning circuit respectively, precision pressure sensor, testing pressure sensor and air pump telecom-connect with signal conditioning circuit respectively, air pump, precision pressure sensor and testing pressure sensor are also connected with four-way connection by gas circuit respectively, another interface of four-way connection is connected with three-way connection, and another interface of three-way connection is connected with gas-holder.
2. pressure transducer proving installation according to claim 1, is characterized in that: described host computer connects or pci bus connection with adopting serial ports connection, usb bus being connected of data acquisition system (DAS).
3. pressure transducer proving installation according to claim 1, is characterized in that: described data acquisition system (DAS) has analog input AD, analog output DA, digital quantity input DI and digital output DO function.
CN201420024891.XU 2014-01-15 2014-01-15 Pressure sensor testing device CN203672558U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420024891.XU CN203672558U (en) 2014-01-15 2014-01-15 Pressure sensor testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420024891.XU CN203672558U (en) 2014-01-15 2014-01-15 Pressure sensor testing device

Publications (1)

Publication Number Publication Date
CN203672558U true CN203672558U (en) 2014-06-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420024891.XU CN203672558U (en) 2014-01-15 2014-01-15 Pressure sensor testing device

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CN (1) CN203672558U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104597826A (en) * 2014-12-31 2015-05-06 广东戈兰玛汽车系统有限公司 Sensor and output signal monitoring method and system thereof
CN104776956A (en) * 2014-01-15 2015-07-15 上海理工大学 Test device for pressure sensors
CN104833456A (en) * 2015-05-29 2015-08-12 中国南方电网有限责任公司超高压输电公司检修试验中心 Onsite detection device and method for pressure sensor of valve cooling system
CN105865702A (en) * 2015-02-09 2016-08-17 英飞凌科技股份有限公司 Sensor network supporting self-calibration of pressure sensors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104776956A (en) * 2014-01-15 2015-07-15 上海理工大学 Test device for pressure sensors
CN104597826A (en) * 2014-12-31 2015-05-06 广东戈兰玛汽车系统有限公司 Sensor and output signal monitoring method and system thereof
CN105865702A (en) * 2015-02-09 2016-08-17 英飞凌科技股份有限公司 Sensor network supporting self-calibration of pressure sensors
CN105865702B (en) * 2015-02-09 2018-12-07 英飞凌科技股份有限公司 The self-alignment sensor network of support pressure sensor
CN104833456A (en) * 2015-05-29 2015-08-12 中国南方电网有限责任公司超高压输电公司检修试验中心 Onsite detection device and method for pressure sensor of valve cooling system
CN104833456B (en) * 2015-05-29 2017-09-01 中国南方电网有限责任公司超高压输电公司检修试验中心 A kind of valve cooling system pressure sensor on-site detecting device and method

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140625

Termination date: 20150115

EXPY Termination of patent right or utility model