Method for testing double-direction torque of eddy current dynamometer

Abstract

The invention relates to a method for testing double-direction torque of an eddy current dynamometer. In the method, a pull pressure sensor with a strain chip type structure is subjected to stressing calibration through analog-to-digital conversion to generate the double-direction torque according to different positive and negative voltages generated by the tensile force and the pressure of the pull pressure sensor, and the rotation direction of a prime motor is determined through positive and negative torque voltages according to a forward zero point, forward fullness, a reverse zero point and reverse fullness of the calibration, so that respective calibration data is called without any improvement on mechanical structures; the test method is simple and practical and is extremely high incost performance; in a test for measuring the torque of a motor or an engine, the problem that measurement accuracy is drifted due to incapability of zeroing of a mechanical position generated by applying double-direction force to a swing body measured by the eddy current dynamometer during torque direction variation of an S-shaped pull pressure sensor in the prior art is solved; and when new energy source power racks such as the motor and the like are tested, the positive and negative rotation of the motor can be automatically determined according to measured different positive and negative torque, so that measurement accuracy and testing efficiency are effectively improved.

Description

technical field [0001] The invention relates to a bidirectional torque testing method for an eddy current dynamometer. Background technique [0002] The function of the main engine of the eddy current dynamometer is to use the current to generate the eddy current to form an electromagnetic field, and it is a special device that applies force to the rotating machine through the rotation of the rotor in the magnetic field. It needs to use the tension and pressure sensor with strain gauge structure to measure the torque. Due to the low sensitivity of the tension and pressure sensor and the small output signal amplitude, most of the measurement display circuits for the tension and pressure sensor of the eddy current dynamometer use DC amplification, and then by The voltmeter displays the torque value in the form of voltage. This kind of torque measurement display circuit has a large measurement error and does not meet the current measurement accuracy requirements; another measur...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a two-way torque test method for an eddy current dynamometer to solve the problem that the existing eddy current dynamometer torque test method cannot test the two-way torque and the zero point will drift after the tension and pressure conversion

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