Differential pressure sensor static performance detection device

Abstract

The invention and creation provide a differential pressure sensor static performance detection device comprising a pressure building branch and a reference branch. The pressure building branch comprises an electromagnetic valve A and a pneumatic control valve A. The pressure building branch also comprises a piston branch provided with a piston. The reference circuit comprises an electromagnetic valve B and a pneumatic control valve B. The differential pressure sensor static performance detection device also comprises an access position point of a differential pressure sensor to be detected and an access position point of a reference sensor which are mutually connected in parallel. The pneumatic control valve A is communicated with one chamber of the differential pressure sensor to be detected and one chamber of the reference sensor simultaneously. The pneumatic control valve B is communicated with the other chamber of the differential pressure sensor to be detected and the other chamber of the reference sensor simultaneously. The piston branch is connected between the pneumatic control valve A and the access position point of the differential pressure sensor to be detected and / or the access position point of the reference sensor. The differential pressure sensor static performance detection device has advantages of high detection efficiency and detection precision.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a device capable of accurately detecting the static performance of a differential pressure sensor. Background technique [0002] Differential Pressure Sensor DPS (Differential Pressure Sensor) is a sensor used to measure the difference between two pressures. The occasions have a wide range of applications. The commonly used differential pressure sensor is usually divided into two chambers by an elastic diaphragm. When the fluid entering the two chambers has a pressure difference, it will cause the deformation of the elastic diaphragm, which will lead to changes in optical and electrical signals. Pressure differential information is obtained by analyzing the changing signal. [0003] The static performance index of a differential pressure sensor is the basic standard for judging the performance of a differential pressure sensor, and its index includes full-scale outp...

AI Technical Summary

Problems solved by technology

[0005] 1. If the number of sensors to be detected is large, the existing technical solutions will take more time and require personnel to be detected for a long time

[0006] 2. Due to the existence of leakage factors, there is a possibility that the output pressure value is inconsistent with the actual pressure value when manually reading the signal of the reference pressure sensor and the signal of the pressure sensor under test at the same time

have an impact on detection accuracy

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