A Method for Evaluation of Object's Relative Distance Deviation

Abstract

The invention discloses a method for evaluating relative distance deviation of objects. The method includes the following steps: a. a linear motor and a damper are at a static state, and a positioning place transmits one time signal or a plurality times of signal waves to the direction of the damper, and a signal wave or the plurality times of signal waves which is or are reflected are received, and an initial average distance x0 is obtained at the static state; b. the linear motor operates, the damper conducts uniform speed reciprocating movement at a frequency of m times per second, the positioning place continuously transmits n times of signal waves to the direction of the damper, the reflected signal waves are received, and real-time distances y1, y2,...,yn under a moving state are successively obtained, and the real-time average distance y0=(y1+y2+y3+...... +yn) is obtained; c. a relative distance deviation value z0=y0-x0 is obtained by the initial average distance x0 and the real-time average distance y0. The technical solution is a method for evaluating relative distance deviation of the objects which is easy to implement, and obviates the need for re-adjusting the position of a signal transmission apparatus after each updating of a damper or a balancing weight.

Description

technical field [0001] The invention relates to the technical field of motor and shock absorber vibration detection and evaluation methods, in particular to an evaluation method for relative distance deviation of objects. Background technique [0002] A shock absorber is usually installed on the motor shaft of an existing motor, especially a linear motor, and a plurality of counterweights are detachably installed on the shock absorber to reduce the axial or radial force produced by the motor shaft under working conditions. to the vibration. Before the motor is actually applied to the equipment, it is necessary to detect the relative distance deviation value of the shock absorber installed on it, and evaluate the detected deviation value to see if it meets the amplitude threshold standard in the parameters of the shock absorber itself. Specifically, Each shock absorber is elastic, and after production, it has a set of corresponding elastic and amplitude threshold standard pa...

AI Technical Summary

Problems solved by technology

When the shock absorber 30 blocks the light beam, the light beam reflection is detected by the laser emitting device 50, and ideally, the time for the light beam to pass is half a cycle in each movement cycle, and the blocking time is also half a cycle. However, due to the influence of factors such as the material of the shock absorber 30 itself, in practical applications and tests, the shock absorber 30 has a certain degree of amplitude influence during reciprocating motion at a constant speed. The evaluation deviation of the number of states and the time difference, obviously, the larger the difference, the larger the vibration amplitude of the shock absorber 30, which is more prone to fatigue damage in the test

Simultaneously, when performing evaluation tests frequently, due to the different parameters of the linear motor 10 or the shock absorber 30 itself, such as having different motion amplitudes, etc., and in each test, the shock absorber 30 is equipped with different numbers and quality The counterweight 40 needs to determine that the corresponding datum plane is different each time. Correspondingly, the laser emitting device 50 also needs to be re-fixed and installed on the position corresponding to the datum plane every time, which is relatively complicated.

[0005] In addition, in the prior art, there is also a method of installing an accelerometer on the side of the shock absorber facing away from the linear motor, and the accelerometer communicates with the terminal device to read the value during the test to form a waveform graph, and analyze it to obtain the test value. However, the general accelerometer itself has a certain quality, which cannot be ignored after being installed on a small reducer, which will affect the amplitude of the reducer itself in the test, thus affecting the accuracy of the test and the value

Images