Characterization pressure change mould box

Abstract

The invention relates to a characterization pressure change mould box, and relates to the field of pressure meters. The characterization voltage change mould box comprises a main circuit module, a module box circuit, a connector circuit, a pre-amplification circuit, an AD conversion circuit and a data storage circuit, wherein the module box circuit is used for acquiring an initial analog pressuresignal and outputting the initial analog pressure signal to the pre-amplification circuit; the module box circuit is further used for acquiring an analog temperature signal and outputting the analog temperature signal to the AD conversion circuit; the pre-amplification circuit is used for amplifying the initial analog pressure signal to obtain an amplified analog pressure signal and outputting theamplified analog pressure signal to the AD conversion circuit; the AD conversion circuit is used for converting the amplified analog pressure signal into a digital pressure signal and outputting thedigital pressure signal to the connector circuit. According to the scheme, the technical problem of how to improve the precision of the output of the pressure change module box is solved, and the mould box is suitable for pressure detection.

Description

technical field [0001] The invention relates to the field of pressure instruments, in particular to a characteristic pressure change mold box. Background technique [0002] The pressure change module is an instrument that converts pressure into electrical signals for remote transmission and control. The existing pressure variable module box includes a basic cavity and a Wheatstone bridge. After being under pressure, the signal is output to the main circuit module through the wire connector. Since the wire connection analog signal is easily interfered, the signal is unstable and jumps and deviation. [0003] Temperature also has a great influence on the measured pressure, so when measuring the pressure, it is necessary to measure the temperature at the same time, which is used to correct and compensate the measured pressure according to the temperature. Or when it needs to be replaced due to other reasons such as the production process, the newly replaced main circuit modul...

AI Technical Summary

Problems solved by technology

The existing pressure variable module box includes a basic cavity and a Wheatstone bridge. After being under pressure, the signal is output to the main circuit module through the wire connector. Since the wire connection analog signal is easily interfered, the signal is unstable and jumps and deviation

[0003] Temperature also has a great influence on the measured pressure, so when measuring the pressure, it is necessary to measure the temperature at the same time, which is used to correct and compensate the measured pressure according to the temperature. Or when it needs to be replaced due to other reasons such as production process, the newly replaced main circuit module needs to be re-corrected, compensated and calibrated, resulting in the failure of the voltage transformer module to replace the main circuit module, which affects the user's on-site safe production and increases the user's production and maintenance costs.

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