Pressure sensor test system

Abstract

The present invention provides a pressure sensor test system. The system comprises a pressure base, a pressure controller, a high and low-temperature box, a programmable resistance cabinet, a multimeter and an industrial personal computer; the pressure base is used for applying reference pressure onto a plurality of pressure sensors; the pressure controller is used for providing target pressure required by testing; the high and low-temperature box is used for providing reference temperature required by testing; the programmable resistance cabinet is used for performing resistance compensationon the test pressure sensors; the multimeter is used for testing the voltage, current and resistance of the test pressure sensors; and the industrial personal computer is used for controlling the pressure controller, the high and low-temperature box and the programmable resistance cabinet. When the pressure sensor test system is used for testing the pressure output characteristics of the pressuresensors; when the reference temperature is relatively high, the programmable resistance cabinet can output resistance to compensate the resistance of the pressure sensors, so that influence of high temperature on the pressure sensors can be offset; and the switching of the plurality of pressure sensors is realized through a multiplexer, so that the test of the plurality of pressure sensors can berealized. The system is suitable for the test work of mass-produced pressure sensors.

Description

technical field [0001] The invention relates to the field of sensor testing, and more specifically, to a pressure sensor testing system. Background technique [0002] At present, the existing pressure sensor testing system is composed of a pressure seat, a high and low temperature box, a pressure controller, a multimeter, and an industrial computer. The pressure seat provides all the pressure sensors placed in the pressure seat with the reference pressure required for testing. , set the reference temperature required for the test through a high and low temperature box, and then measure the current, voltage and resistance of a pressure sensor through a multimeter. [0003] However, since the temperature will affect the resistance of the pressure sensor, if the reference temperature is high, the internal resistance of the general pressure sensor will change when the temperature is high, resulting in the voltage and current of the pressure resistor tested at the reference tempe...

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Problems solved by technology

[0003] However, since the temperature will affect the resistance of the pressure sensor, if the reference temperature is high, the internal resistance of the general pressure sensor will change when the temperature is high, resulting in the voltage and current of the pressure resistor tested at the reference temperature. and resistance are inaccurate, thus affecting the judgment of pressure sensor performance

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