Civil aircraft product ground tester pressure system calibration method

A pressure system and calibration method technology, applied in the field of measurement, can solve the problems of pressure sensor signal line damage, low work efficiency, inconsistent calibration state and use state, etc., and achieve the effect of solving the inconsistent calibration state and working state and efficient calibration

Pending Publication Date: 2021-06-01
JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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AI Technical Summary

Problems solved by technology

When using this calibration method to calibrate the pressure system, the pressure sensor needs to be disassembled frequently, which is likely to cause damage to the signal line of the pressure sensor, and has disadvantages such as low work efficiency, inconsistent calibration status and use status, etc.

Method used

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  • Civil aircraft product ground tester pressure system calibration method

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Embodiment

[0019] When the civil aircraft product ground tester has a three-way pipeline and does not have the conditions for autonomous operation, the calibration method of the present invention is used, taking a set of pressure systems with a measurement range of (0-1000) kPa and an accuracy of ±0.5% FS as an example.

[0020] 1. If figure 1 As shown, connect the pressure output port of the pressure calibration device to valve II and ensure a reliable seal.

[0021] 2. Adjust the valve to the calibration state (close valve I, open valve II).

[0022] 3. Pressurize to the upper limit of the pressure system (1000kPa) by the pressure calibration device, keep it for 1min, and observe the tightness of the whole system.

[0023] 4. Stable pressurization by the pressure calibration device to each calibration point (0kPa, 200kPa, 400kPa, 600kPa, 800kPa, 1000kPa) to the upper limit of the range, and then reverse calibration until the pressure drops to the lower limit of the range

[0024] 5. ...

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Abstract

The invention belongs to the field of metering, and relates to a civil aircraft product ground tester pressure system calibration method. The calibration method is suitable for a civil aircraft product ground tester with a three-way pipeline, the three-way pipeline is composed of a three-way pipe fitting, a valve I and a valve II, the three-way pipe fitting is connected with a field pipeline, a pressure calibration device and a pressure sensor, and the valve I and the valve II are located on the left side and the right side of the three-way pipe fitting; the calibration method overcomes the defects of damage to a signal line of the pressure sensor, low working efficiency and the like caused by frequent disassembly of the pressure sensor in a traditional calibration method, solves the problem that the calibration state and the use state are inconsistent, and realizes a free conversion function of the pressure system from the working state to the calibration state, so that the purpose of quickly calibrating the pressure system is achieved, the working efficiency and the reliability of the calibration result are improved, and the method has universality and good practical value for common pressure instruments.

Description

technical field [0001] The invention belongs to the field of measurement and relates to a method for calibrating the pressure system of a ground tester for civil aircraft products. Background technique [0002] Common pressure system calibration generally removes the pressure sensor from the on-site pipeline and connects it to the pressure calibration device. The pressure calibration device applies standard pressure to each calibration point, and reads the displayed value of the pressure system under test at the same time. By comparing the standard and the measured value to achieve calibration of the pressure system. When using this calibration method to calibrate the pressure system, the pressure sensor needs to be frequently disassembled, which is likely to cause damage to the signal line of the pressure sensor, and has disadvantages such as low work efficiency and inconsistent calibration status and usage status. Contents of the invention [0003] The object of the pre...

Claims

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Application Information

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IPC IPC(8): G01L27/00
CPCG01L27/002G01L27/005
Inventor 王晓宇肖智峰
Owner JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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