Testing system and testing method of pneumatic proportional pressure valve
A test system, pneumatic proportional technology, applied in the testing of mechanical parts, the testing of machine/structural parts, measuring devices, etc., can solve the problems of low degree of automation of the test system, waste of manpower and material resources, uneven curves, etc., to achieve data preservation Convenience and efficiency, reducing equipment investment and easy operation
Inactive Publication Date: 2018-04-17
YANSHAN UNIV
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Problems solved by technology
Before the pneumatic proportional pressure valve leaves the factory and after the proportional pressure valve is repaired, the characteristic index of the pneumatic proportional pressure valve should be tested. However, in the past, when the characteristic index of the pneumatic proportional pressure valve was tested, it was manually recorded data and analyzed characteristics to test the system. The degree of automation is low, and it requires a lot of manpower and material resources, the efficiency is low, and there are shortcomings such as poor test accuracy and unsmooth curves.
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[0024] Choose Bosch Rexroth (Rexroth) pneumatic proportional pressure valve ED02 as an example to describe the test method of the present invention in detail:
[0025] (1) Air source parameter setting: Build the pneumatic circuit and electrical control circuit of the system according to the specification parameters of the test proportional pressure valve ED02. The pressure of safety valve 3 is: P 0 =15Bar, utilize the control system software on the industrial computer 16 to set the maximum pressure and the minimum pressure of the pressure relay 6 to be respectively: P 1 =12 Bar, P 2 = 2 Bar;
[0026] (2) According to the parameters and specifications of the tested pneumatic proportional pressure valve ED02, set the type of output signal on the test software of the industrial computer system as: triangular wave signal, the amplitude of the signal is: 10V, and the frequency of the test signal is: 0.05HZ;
[0027](3) Then on the industrial computer 16, the dimension conversion...
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The invention discloses a testing system and testing method of a pneumatic proportional pressure valve. The testing system is composed of an air source system, a pneumatic control valve system, a signal acquisition and signal processing system, an industrial control machine and an upper computer software system. The testing method comprises the following steps: setting a system parameter; according to the specification of a to-be-tested pneumatic proportional pressure valve, setting types and specifications of signals needing to be outputted at industrial personal computer system testing software; setting a dimension conversion relationship between a flow sensor and a pressure sensor at an industrial personal computer and enabling a data size of data collected by the testing system to be aneeded engineering unit; starting an air pump and setting a pressure value needed by the system by a reducing valve of a pneumatic three-joint element; carrying out flow characteristic testing; carrying out pressure characteristic testing; after text completion, selecting test stopping, stopping the air pump, and turning off a corresponding stop valve; and recording a data curve. Therefore, the high-automation high-precision testing of the testing system is realized; and the testing operation is simplified.
Description
technical field [0001] The invention relates to the field of testing pneumatic components, in particular to a testing system and testing method for a pneumatic proportional pressure valve. Background technique [0002] Pneumatic proportional pressure valves (E / P) are widely used in pneumatic control circuits and automatic production lines, and are used to control output pressure or displacement by cylinders for clamping and pushing of products. The core component of pneumatic servo pressure control is a pneumatic proportional pressure valve, which adjusts the output pressure value proportionally according to the magnitude of the input electrical signal. Before the pneumatic proportional pressure valve leaves the factory and after the proportional pressure valve is repaired, the characteristic index of the pneumatic proportional pressure valve should be tested. However, in the past, when the characteristic index of the pneumatic proportional pressure valve was tested, it was ...
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IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 张伟彭乐乐刘尚郑阳张彦欢王斌
Owner YANSHAN UNIV