CN217211248U - Performance testing device of pressure sensor - Google Patents
Performance testing device of pressure sensor Download PDFInfo
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- CN217211248U CN217211248U CN202220589883.4U CN202220589883U CN217211248U CN 217211248 U CN217211248 U CN 217211248U CN 202220589883 U CN202220589883 U CN 202220589883U CN 217211248 U CN217211248 U CN 217211248U
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Abstract
The utility model discloses a pressure sensor's capability test device, including standard pressure generation module, sensor power module and signal processing and control module. And the standard pressure generation module is used for outputting a certain pressure to the pressure sensor to be detected according to the instruction of the signal processing and control module and returning the output pressure value to the signal processing and control module. The sensor power supply module is used for providing working voltage with certain amplitude for the pressure sensor to be detected according to the instruction of the signal processing and control module. The signal processing and control module comprises a signal processing module and a signal control module. The signal control module is used for controlling the standard pressure generation module and the sensor power supply module to output required air pressure or voltage according to detection requirements. And the signal processing module is used for reading the voltage values output by the standard pressure generation module and the pressure sensor to be detected, comparing the voltage values and displaying a test result.
Description
Technical Field
The utility model relates to a sensor test technical field, concretely relates to pressure sensor's capability test device.
Background
The automobile sensor is a sensing element of an automobile, and the quality of the performance of the automobile sensor is important for the performance and the driving safety of the automobile. The pressure sensor is a sensor which converts a received force signal into an electric signal through a pressure-sensitive element, and has a wide application in an automotive electronic control system, and is commonly used in an engine management system, a comfort system, a transmission system, a safety system and the like.
The output curve of the pressure sensor is usually adjusted to a linear curve, so when the pressure sensor is tested, only the minimum and maximum pressure points are usually selected for input, and then whether the output electrical signal is the correct value is observed. Although this testing method is fast and convenient, because the testing pressure points are limited, if the output curve of the pressure sensor does not meet the linear standard, the output signal of the end pressure point is correct, and the output signal of the middle pressure point is larger or smaller, which obviously fails to accurately evaluate the performance of the pressure sensor.
In addition, the conventional pressure sensor performance testing device has the defects of difficult standard pressure output adjustment, manual judgment of a test result, incapability of tracing test data, low testing efficiency and the like.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a pressure sensor's capability test device can measure the sensor output voltage value under a plurality of pressure points to judge the test result automatically, measure simply, reliably.
A performance testing device of a pressure sensor comprises a standard pressure generation module, a sensor power supply module and a signal processing and control module.
And the standard pressure generation module is used for outputting a certain pressure to the pressure sensor to be detected according to the instruction of the signal processing and control module and returning the output pressure value to the signal processing and control module.
The sensor power supply module is used for providing working voltage with a certain amplitude for the pressure sensor to be detected according to the instruction of the signal processing and control module.
The signal processing and control module comprises a signal processing module and a signal control module. The signal control module is used for controlling the standard pressure generation module and the sensor power supply module to output required air pressure or voltage according to detection requirements. And the signal processing module is used for reading the voltage values output by the standard pressure generation module and the pressure sensor to be detected, comparing the voltage values and displaying a test result.
Preferably, the standard pressure generating module includes an air source, and is configured to output compressed air with a certain pressure to the pressure sensor to be detected, and a maximum value of the pressure output by the standard pressure generating module is higher than a maximum value measured by the pressure sensor to be detected by 0.05 MPa.
Preferably, the standard pressure generation module comprises a standard pressure sensor for measuring the actual air pressure value output by the standard pressure generation module. The precision of the standard pressure sensor is 3-10 times of that of the pressure sensor to be detected.
Preferably, the sensor power supply module is a program-controlled power supply, receives the instruction of the signal processing module, and provides a direct-current working power supply for the pressure sensor to be detected.
Preferably, the signal processing module compares the voltage values output by the standard pressure generation module and the pressure sensor to be detected, and displays the detection result through an indicator lamp.
The utility model discloses following beneficial effect has:
the device is simple and the measuring efficiency is high. The output value of the pressure sensor to be detected under different pressure values can be repeatedly and repeatedly detected, the measurement results are directly compared, manual reading is not needed, the detection precision is high, the reliability of the test results is guaranteed, and the performance of the pressure sensor to be detected can be truly and comprehensively reflected.
Drawings
FIG. 1 is a schematic diagram of a pressure sensor performance testing apparatus system;
FIG. 2 is a schematic external view of a pressure sensor performance testing apparatus according to an embodiment;
FIG. 3 is a flow chart of a pressure sensor performance test in an embodiment;
fig. 4 shows the performance test results of the pressure sensor in the example.
Detailed Description
The invention is further explained with the accompanying drawings;
as shown in fig. 1, a performance testing apparatus for a pressure sensor includes a standard pressure generating module, a sensor power supply module, and a signal processing and control module.
The standard pressure generation module comprises a gas source and a standard pressure sensor. The standard pressure generation module outputs compressed air with certain pressure to the pressure sensor to be detected through the air source according to the instruction of the signal processing and control module, and the maximum value of the pressure output by the air source is 0.05MPa higher than the maximum measurement value of the pressure sensor to be detected. The standard pressure sensor is used for measuring the actual pressure value of the compressed air output by the air source and returning the actual pressure value to the signal processing and control module, and the precision of the standard pressure sensor is 3-10 times that of the pressure sensor to be detected.
The sensor power supply module is a programmable power supply and provides direct-current working voltage with a certain amplitude for the pressure sensor to be detected according to the instruction of the signal processing and control module.
The signal processing and control module comprises a signal processing module and a signal control module. The signal control module is used for controlling the standard pressure generation module and the sensor power supply module to output required air pressure or voltage according to detection requirements. And the signal processing module is used for reading voltage values output by the standard pressure generation module and the pressure sensor to be detected, comparing the voltage values and displaying a test result through an indicator lamp.
Fig. 2 provides an external view of a performance testing apparatus for a pressure sensor. The standard pressure generating module 1 is arranged at the top of the test bench shell 3, and a pressure output port of the standard pressure generating module 1 is connected with the air path interface 5. Sensor power module sets up inside testboard casing 3, and power outlet is connected with electrical interface 7. The signal processing and control module comprises a single-board industrial personal computer 2, an indicator light 4 and a start/stop button 6. In this embodiment, 5 gas circuit interfaces and 5 electrical interfaces have been set up at testboard casing 3, consequently can realize detecting when 5 pressure sensor, improve detection efficiency.
As shown in fig. 3, in the performance test process, firstly, according to the parameters of the pressure sensor to be tested, the parameters are set on the single-board industrial control computer 2, and a series of pressure points for testing are determined. And then connecting a power supply interface of the pressure sensor to be detected with the electric interface 7, and connecting the stress interface with the gas circuit interface 5. The start/stop button 6 is then pressed to start the device. The standard pressure generation module 1 firstly outputs the pressure of the maximum range of the pressure sensor to be detected, the air tightness detection is carried out on the pressure sensor to be detected, if the air leakage phenomenon exists, the single-board industrial control computer 2 judges that the product is unqualified, the indicator lamp 4 is bright red, and the performance test is finished. If the air leakage phenomenon does not exist, the test is started one by one according to a series of set test pressure points. If the test data of a certain pressure point is unqualified, the single-board industrial control computer 2 judges that the product is unqualified, the indicator lamp 4 is bright red, and the performance test is finished. If the data are qualified after all the pressure point tests are finished, the single-board industrial control computer 2 judges that the product is qualified, the indicator lamp 4 is in green, and the performance test is finished.
While the output voltage V of an ideal pressure sensor is perfectly linear with the input pressure P, the output curve of an actual pressure sensor is not perfectly linear. As shown in fig. 4, at 0 to the maximum range P max Set 3 testing pressure points P between 1 、P 2 And P 3 And outputting pressure to the pressure sensor to be detected through the standard pressure generation module 1, and receiving a voltage value output by the pressure sensor to be detected through the single-board industrial control computer 2. At a set pressure point P 2 Where the actual voltage value output by the pressure sensor to be detected is V 2 ' the ideal voltage value output by the standard pressure generating module 1 is V 2 If V is present 2 -V 2 ’≤αV max P 2 /P max At a pressure point P 2 The data of the pressure sensor to be detected is qualified, wherein alpha isAccuracy of pressure sensor to be detected, V max 、P max Respectively the maximum measuring range of the sensor to be detected.
The above description is an example of the present invention, and should not be construed as limiting the scope of the present invention, and all changes and modifications that can be made without departing from the spirit and substance of the present invention shall fall within the scope of the appended claims.
Claims (6)
1. A performance testing device of a pressure sensor is characterized in that: the device comprises a standard pressure generation module, a sensor power module and a signal processing and control module;
the standard pressure generation module is used for outputting a certain pressure to the pressure sensor to be detected according to the instruction of the signal processing and control module and returning the output pressure value to the signal processing and control module;
the sensor power supply module is used for providing working voltage with a certain amplitude for the pressure sensor to be detected according to the instruction of the signal processing and control module;
the signal processing and control module comprises a signal processing module and a signal control module; the signal control module is used for controlling the standard pressure generation module and the sensor power supply module to output required air pressure or voltage according to detection requirements; and the signal processing module is used for reading the voltage values output by the standard pressure generation module and the pressure sensor to be detected, comparing the voltage values and displaying a test result.
2. The performance testing apparatus of a pressure sensor according to claim 1, wherein: the standard pressure generation module outputs compressed air with certain pressure to the pressure sensor to be detected through an air source, and the maximum value of the pressure which can be output by the air source is 0.05MPa higher than the maximum measurement value of the pressure sensor to be detected.
3. The performance testing apparatus of a pressure sensor according to claim 1, wherein: and the standard pressure generation module measures the actual air pressure value output by the standard pressure generation module through a standard pressure sensor and returns the actual air pressure value to the signal processing and control module.
4. A performance testing apparatus of a pressure sensor according to claim 3, wherein: the precision of the standard pressure sensor is 3-10 times of that of the pressure sensor to be detected.
5. The performance testing apparatus of a pressure sensor according to claim 1, wherein: the sensor power supply module is a program-controlled power supply, receives the instruction of the signal processing module and provides a direct-current working power supply for the pressure sensor to be detected.
6. The performance testing apparatus of a pressure sensor according to claim 1, wherein: and the signal processing module compares the voltage values output by the standard pressure generation module and the pressure sensor to be detected and displays the detection result through the indicator lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220589883.4U CN217211248U (en) | 2022-03-17 | 2022-03-17 | Performance testing device of pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220589883.4U CN217211248U (en) | 2022-03-17 | 2022-03-17 | Performance testing device of pressure sensor |
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| Publication Number | Publication Date |
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| CN217211248U true CN217211248U (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220589883.4U Active CN217211248U (en) | 2022-03-17 | 2022-03-17 | Performance testing device of pressure sensor |
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| CN (1) | CN217211248U (en) |
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- 2022-03-17 CN CN202220589883.4U patent/CN217211248U/en active Active
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