Performance testing device for pressure sensor production

Abstract

The invention relates to a performance testing device for pressure sensor production, and belongs to the technical field of pressure sensor performance test. The performance testing device comprises a first cavity, a plugging piece capable of moving up and down is arranged in the first cavity and divides the first cavity into an upper cavity and a lower cavity, the upper cavity is provided with a plugging piece moving measuring device, and the lower cavity is used for containing a to-be-detected sensor; an air inlet is formed in the lower cavity; the plugging piece movement measuring device comprises liquid located above the plugging piece, the liquid floats a floating block, the floating block is connected with a gravity column through a steel wire, and the gravity column is located in the second cavity. The air pressure in the lower cavity can be slowly changed, and the precision of the to-be-detected sensor is determined through the readings of the to-be-detected sensor placed in the lower cavity and the standard air pressure detection device; when the air pressure in the lower cavity reaches a certain degree, the air pressure in the lower cavity is not changed, the plugging piece moves, the plugging piece movement measuring device measures the displacement of the plugging piece, and the reliability and authenticity of the to-be-detected sensor are judged through a plugging piece position real-time movement curve.

Description

technical field [0001] The present application relates to the technical field of pressure sensor performance testing, in particular to a performance testing device for pressure sensor production. Background technique [0002] Pressure sensors are the most commonly used sensors in industrial practice. The pressure sensors we usually use are mainly manufactured using the piezoelectric effect, and such sensors are also called piezoelectric sensors. Pressure sensors need to be tested for accuracy after production. [0003] In related technologies, the pressure sensor is usually placed on the weighing platform, and the pressure sensor is fixed by a fixing device, and then the output end of the pressure test equipment is driven by the cylinder or the rotating motor to apply pressure to the pressure sensor. The pressure equipment is usually equipped with a pressure reading device, and the accuracy of the pressure sensor to be tested is tested by comparing the reading of the press...

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Problems solved by technology

[0004] There are defects in the above content. The method of applying pressure driven by the cylinder or the rotating motor is likely to cause a relatively violent impact on the pressure sensor, which is not gentle enough; there may be errors between the pressure reading device and the actual pressure applied to the pressure sensor to be tested, resulting in The authenticity and reliability of sensor accuracy detection are reduced

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