Pressure measuring equipment zeroing device for aero-engine test-bed and zeroing method

Abstract

The invention provides a pressure measuring equipment zeroing device for an aero-engine test-bed and a zeroing method. The pressure measuring equipment zeroing device includes a mode switching pipe and a host computer. Each of the control pipes in the mode switching pipe is communicated with each common end of pressure measuring equipment. The mode switching pipe includes a mode intake pipe, control pipes and an exhaust pipe. Gas is supplied to the control pipes through the mode intake pipe. The working mode of the pressure measuring equipment is switched into a zeroing mode, so that the host computer loads an IP address of the pressure measuring equipment. The measuring end of a pressure sensor inside the pressure measuring device is in short circuit with a reference end. A zeroing command is sent to the pressure measuring equipment through the host computer. The pressure value measured by the pressure sensor after the short circuit is read out and set as the current zero value of the pressure sensor. All the solenoid valves of the mode switch pipe are controlled by the host computer, so as to control the zeroing process.

Description

technical field [0001] The invention relates to the technical field of engine equipment detection, in particular to a zero calibration device and a zero calibration method for pressure measurement equipment of an aero-engine test bench. Background technique [0002] The aero-engine test bench has a wide range of temperature changes every day, and even the temperature difference often changes by more than 10 degrees within a day, which brings a certain temperature drift to the air pressure measurement equipment, which leads to distortion of engine parameter measurement and affects test results. analysis and judgment. When the temperature of the engine test bench changes by more than 4 degrees, it is necessary to quickly zero-point the air pressure measurement equipment to obtain the most accurate zero point collection value of the air pressure measurement equipment and ensure the accuracy of the engine test air pressure measurement parameters. [0003] The zero calibration m...

AI Technical Summary

Problems solved by technology

[0004] 1. For the zero calibration of the air pressure measurement system, only a single measuring device can be zeroed. For each zero calibration, the control channel of the measurement module needs to be removed for zero calibration, and then reinstalled after completion

In addition, it is necessary to input information such as the IP address of the air pressure measurement module before each zero calibration, which often results in invalid operations, and the zero calibration data cannot be displayed and saved;

[0005] 2. The air pressure measurement system of the aero-engine test bench generally has more than 20 air pressure measurement devices. If the control channels of all modules are to be disassembled and zeroed one by one, it often costs a lot of money and the efficiency is extremely low

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