CN216795035U

CN216795035U - Sensor precision test system

Info

Publication number: CN216795035U
Application number: CN202123437872.9U
Authority: CN
Inventors: 雷红勇
Original assignee: Beijing Shitemei Measurement And Control Technology Co ltd
Current assignee: Beijing Shitemei Measurement And Control Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-21
Anticipated expiration: 2031-12-31

Abstract

The application relates to a sensor precision testing system, which comprises a control unit, a judging unit, a collecting unit and a controllable signal source controlled by the control unit; the controllable signal source is connected with the sensor to be tested and provides a signal to be tested for the sensor to be tested; the acquisition unit is connected with the sensor to be measured and used for collecting the measurement data output by the sensor to be measured after processing; the controllable signal source and the acquisition unit are both connected with the judgment unit, the judgment unit reads a signal set value of the controllable signal source, the acquisition unit transmits acquired measurement data to the judgment unit, and the judgment unit judges the error precision of the measurement data relative to the signal set value and outputs precision measurement data. The method and the device have the effects of improving the yield, improving the testing precision, improving the testing working efficiency and saving the labor cost.

Description

Sensor precision test system

Technical Field

The application relates to the field of sensor testing, in particular to a sensor precision testing system.

Background

The electric quantity sensor is a detection device, can measure the information of the measured electric quantity, and can convert the detected information into an electric signal or other information in a required form according to a certain rule for output so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like. The method is the first link for realizing automatic detection and automatic control. The device is also a device which converts the measured parameter into direct current and direct voltage and isolates and outputs an analog signal or a digital signal.

The sensor is one of important parts in automatic control, the precision is one of the most important performance indexes of the sensor, and the precision of the sensor directly influences the precision of process control. In order to ensure that the sensor can work normally, the sensor must be factory tested.

In actual production, mostly be artifical the inspection when detecting to the sensor that is surveyed, the inventor discovers, utilizes artifically, has detection efficiency low, can not last in time, in case the time overlength still causes the defect of lou examining, seriously restricts batch product inspection progress easily.

SUMMERY OF THE UTILITY MODEL

In order to improve the efficiency of sensor accuracy test, this application provides a sensor accuracy test system.

The application provides a sensor precision test system adopts following technical scheme:

a sensor precision test system comprises a control unit, a judgment unit, a collection unit and a controllable signal source controlled by the control unit; the controllable signal source is connected with the sensor to be detected and provides a signal to be detected for the sensor to be detected; the acquisition unit is connected with the sensor to be measured and used for collecting the measurement data output by the sensor to be measured after processing;

the controllable signal source and the acquisition unit are both connected with the judgment unit, the judgment unit reads a signal set value of the controllable signal source, the acquisition unit transmits acquired measurement data to the judgment unit, and the judgment unit judges the error precision of the measurement data relative to the signal set value and outputs precision measurement data.

By adopting the technical scheme, the judged test result data of the tested sensor is output through the judging unit, and the result is displayed or the processing operation of the tested sensor is carried out according to the result, so that the precision test of the sensor is completed; the accuracy test of the sensor to be tested is carried out through the center module, so that the test efficiency is improved, the accuracy is more accurate, and the yield, the quality, the accuracy and the efficiency of sensor processing are improved.

Optionally, the system further comprises a digital multimeter, and the acquisition unit is connected with the sensor to be tested through the digital multimeter.

By adopting the technical scheme, digital automatic transmission is realized through the digital multimeter, measured data of a measured signal processed by the measured sensor is subjected to data acquisition, and the measured data is transmitted to the acquisition unit through the format of digital quantity.

Optionally, the system further comprises a code recognizer; the code recognizer recognizes the code on the tested sensor and outputs the code together with the precision test data.

By adopting the technical scheme, the codes identified by the code identifier correspond to the precision measurement data one by one, so that the measuring results correspond to the corresponding sensors, the conditions of result dislocation and missing detection are reduced, and the precision of the test system is further improved.

Optionally, the code is in the form of one of laser coding, bar code or two-dimensional code, and the code identifier is a code scanning gun.

By adopting the technical scheme, the laser coding, the bar code or the two-dimensional code is convenient to identify, and the coding range is large, so that the coding quantity is improved; the code scanning gun is high in code scanning speed, so that the code recognition efficiency is improved, and the overall working speed is increased.

Optionally, the controllable signal source is a controllable current source or a controllable voltage source.

By adopting the technical scheme, the measured signal can be conveniently controlled and the judgment precision can be more intuitively carried out by adopting the controllable current source or the controllable voltage source.

Optionally, the control unit uses HMI to control parameter setting of the test signal.

By adopting the technical scheme, parameter setting of the test signals is carried out by adopting HMI control, and corresponding adjustment can be carried out according to the measurement ranges of different types of tested sensors, so that the system can be applied to sensor precision test under different conditions.

Optionally, the device further comprises a storage unit connected to the determination unit, and the storage unit stores the precision test data.

By adopting the technical scheme, the precision test data are stored, so that the batch measurement data are convenient to count and trace to the source; the qualification rate of the sensors in the same batch can be calculated through statistics, and production adjustment and improvement can be performed according to the qualification rate.

Optionally, the system further comprises a cloud server, wherein the cloud server receives the precision test data and stores the precision test data in a cloud database.

By adopting the technical scheme, the precision test data is uploaded to the cloud, synchronous data sharing is realized, and the precision test system is more digital, so that management and statistics are facilitated.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the accuracy test of the tested sensor is carried out through the central module, so that the test efficiency is improved, the accuracy is more accurate, and the yield, the quality, the accuracy and the efficiency of sensor processing are improved;

2. the codes identified by the code identifier correspond to the precision measurement data one by one, so that the measurement results correspond to the corresponding sensors, the conditions of result dislocation and missing detection are reduced, and the precision of the test system is further improved;

3. the precision test data are stored, so that the batch measurement data are convenient to count and trace to the source; the qualification rate of the sensors in the same batch can be calculated through statistics, and production adjustment and improvement can be performed according to the qualification rate.

Drawings

FIG. 1 is a block diagram showing the construction of a sensor accuracy testing system according to embodiment 1;

fig. 2 is a block diagram showing the structure of a sensor accuracy testing system according to embodiment 2.

Description of reference numerals: 1. a hub module; 11. a control unit; 12. a judgment unit; 13. a collection unit; 131. a digital multimeter; 14. a storage unit; 2. a controllable signal source; 3. a sensor under test; 4. sweep a yard rifle.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The application discloses sensor precision test system.

Example 1

Referring to fig. 1, the sensor precision testing system comprises a central hub module 1 for control and test, a controllable signal source 2 for outputting a tested signal and a tested sensor 3; the center module 1 comprises a control unit 11 for control, a judging unit 12 for judging the accuracy of the sensor 3 to be tested and an acquisition unit 13 for acquiring the measurement data output by the sensor 3 to be tested.

The control unit 11 is connected with the controllable signal source 2 and controls the controllable signal source 2 to output a detected signal; the controllable signal source 2 is connected with the measured sensor 3 and provides a measured signal for the measured sensor 3; the measured sensor 3 receives the measured signal and outputs the measured data, and transmits the measured data to the acquisition unit 13. In order to control the detected signal and judge the precision more intuitively, the controllable signal source 2 adopts a controllable current source or a controllable voltage source; in the present embodiment, the controllable signal source 2 is a controllable current source.

The controllable signal source 2 and the acquisition unit 13 are both connected to the determination unit 12, and the determination unit 12 reads a signal setting value of the controllable signal source 2, where in this embodiment, the signal setting value is a current value of a detected signal output by the controllable current source after being controlled by the control unit 11; the acquisition unit 13 transmits the measurement data acquired from the sensor under test 3 to the determination unit 12, and the determination unit 12 determines the accuracy of the error of the measurement data with respect to the signal set value and outputs the accuracy measurement data.

The judging unit 12 judges the accuracy of the sensor to be tested according to a preset error accuracy threshold, and when the judged error exceeds the threshold, the sensor to be tested is unqualified and cannot work normally; when the judged error is smaller than the threshold value, the tested sensor is qualified and can work normally.

The judging unit 12 outputs the judged test result data of the tested sensor, displays the result or processes the tested sensor according to the result, thereby completing the sensor precision test; the precision test of the tested sensor is carried out through the center module, so that the test efficiency is improved, the precision is more accurate, the working efficiency can be improved, and the defective products are reduced to be put into use.

Example 2

Referring to fig. 2, the present embodiment is different from embodiment 1 in that: still include the code recognizer that is used for discernment and the cloud server that is used for the high in the clouds to store with share, acquisition unit 13 is connected with digital multimeter 131 that is used for digital signal, and backbone module 1 still includes storage element 14.

The measured sensors 3 are all provided with codes, the codes on each measured sensor correspond to the measured sensors one by one, the codes can be printed on the measured sensors 3 in any one of laser coding, bar codes or two-dimensional codes, and the codes are in the form of two-dimensional codes in the embodiment.

The code recognizer correspondingly adopts a code scanning gun 4, the code scanning gun 4 is connected with a storage unit 14, the storage unit 14 is further connected with a judging unit 12, and the storage unit 14 is used for storing codes recognized by two-dimensional codes on the corresponding detected sensor 3 scanned by the code scanning gun 4 and precision measurement data of the detected sensor 3.

The codes scanned by the code scanning gun 4 correspond to the precision measurement data one by one and are stored, so that the batch measurement data are convenient to count and trace to the source; the qualification rate of the sensors in the same batch can be calculated through statistics, and production adjustment and improvement can be performed according to the qualification rate.

In this embodiment, the control unit 11 uses HMI to control the parameter setting of the test signal, and can perform corresponding adjustment according to the measurement ranges of different types of sensors to be tested, so that the system can be applied to the sensor precision test under different conditions.

Further, the storage unit 14 is connected to the cloud server, and uploads the precision test data to a management system or a client database in the cloud server, so that synchronous data sharing is realized, and the precision test system is more digital, thereby facilitating management and statistics.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A sensor accuracy test system characterized in that: comprises a control unit (11), a judgment unit (12), a collection unit (13) and a controllable signal source (2) controlled by the control unit (11); the controllable signal source (2) is connected with the measured sensor (3) and provides a measured signal for the measured sensor (3); the acquisition unit (13) is connected with the sensor (3) to be tested and used for collecting the measurement data output by the sensor (3) to be tested after processing;

the controllable signal source (2) and the acquisition unit (13) are both connected with the judgment unit (12), the judgment unit (12) reads a signal set value of the controllable signal source (2), the acquisition unit (13) transmits acquired measurement data to the judgment unit (12), and the judgment unit (12) judges the error precision of the measurement data relative to the signal set value and outputs precision measurement data.

2. The sensor accuracy testing system of claim 1, wherein: the device also comprises a digital multimeter (131), and the acquisition unit (13) is connected with the sensor (3) to be tested through the digital multimeter (131).

3. The sensor accuracy testing system of claim 1, wherein: the device also comprises a code recognizer; and the code recognizer recognizes the code on the sensor (3) to be tested and outputs the code together with the precision test data.

4. The sensor accuracy testing system of claim 3, wherein: the code adopts one of laser coding, bar code or two-dimensional code, and the code recognizer adopts a code scanning gun (4).

5. The sensor accuracy testing system of claim 1, wherein: the controllable signal source (2) adopts a controllable current source or a controllable voltage source.

6. The sensor accuracy testing system of claim 1, wherein: the control unit (11) adopts HMI control to set parameters of the test signals.

7. The sensor accuracy testing system of any one of claims 1-6, wherein: the device also comprises a storage unit (14) connected with the judging unit (12), and the storage unit (14) stores the precision test data.

8. The sensor accuracy testing system of any one of claims 1-6, wherein: the cloud server receives the precision test data and stores the precision test data in a cloud database.