Pressure scanning valve circuit

Abstract

The invention discloses a pressure scanning valve circuit, which is applied to the technical field of power electronics, and comprises a conditioning unit used for carrying out filtering conditioning on output signals of a preset number of air pressure sensors to obtain a preset number of conditioning signals; the analog-to-digital conversion unit is used for performing analog-to-digital conversion on the conditioning signal to obtain a preset number of digital quantity signals; the main control unit is used for performing data processing on the digital quantity signal to obtain a data processing result; through the arrangement of the conditioning unit in the pressure scanning valve circuit, analog-to-digital conversion is integrated into the pressure measurement process of the pressure scanning valve circuit, so that a pressure measurement result can be transmitted through a digital signal, and the accuracy of pressure detection is improved; and the main control unit is integrated in the pressure scanning valve circuit, so that the overall control of the pressure measurement process is realized, and the accuracy of pressure detection is ensured.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a pressure scanning valve circuit. Background technique [0002] At present, the core of the measurement principle of the pressure sensing device is the bridge measurement method, that is, there is an air pressure sensor (ie a pressure sensor) in each airway; The resistance will change, and the corresponding voltage (ie analog quantity) will be output under the action of the excitation voltage. [0003] Common bridge measurement methods mainly include Wheatstone bridge and Kelvin bridge. The Wheatstone bridge is mainly used to measure medium resistance (10-106 ohms). Because of its simple principle, it is usually used as an example to explain the principle of the bridge. The Kelvin bridge was proposed by the British scientist W. Thomson in 1862 when he studied the measurement of small resistance, and it was called the Thomson bridge. Later, it was named Kelvin bridge ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the pressure valve scanning circuit will amplify the collected output of the air pressure sensor (that is, the pressure sensor) in the pressure sensing device and transmit it to the scanning valve host. Since the long-distance transmission of the analog signal is susceptible to many interferences, the pressure detection The accuracy is not high

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