Method for detecting washing machine vibration displacement data based on MEMS sensor

Abstract

The invention relates to a method for detecting washing machine vibration displacement data based on an MEMS sensor. The method comprises the steps that triaxial acceleration data of a washing machine external barrel are collected by the MEMS sensor; the triaxial acceleration data are converted into corresponding displacement data through the quadratic integral; before conversion, an IIR filter is adopted for filtering away data with the signal frequency lower than the preset frequency; after conversion, the rotating speed of a washing machine is judged, and different IIR filter coefficients and filter gains are selected based on the rotating speed of the washing machine for carrying out correcting and compensation on the displacement data obtained in the previous step, so that various vibration interference signals existing in the washing machine running process are eliminated, and vibration displacement data output with the high precision is obtained. Vibration displacement data are filtered two times, so that the vibration displacement data with the high precision are obtained, the current vibration displacement data are output to a washing machine computer controller in real time, the rotating speed of a washing machine running motor is controlled, the washing program is optimized, the washing machine working noise is lowered, and the washing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of computer program applications, in particular to a method for detecting vibration displacement data of a washing machine based on a MEMS sensor. Background technique [0002] During the drying process of the washing machine, the inner tub rotates at high speed, and the clothes in the tub are also dried and centrifugally moved, which will generate vibration and also drive the outer tub to vibrate. It will collide with the shell of the washing machine. In the prior art, dynamic balancing technology is used to reduce this kind of vibration. For example, a high-rigidity boom spring is used between the outer barrel and the outer casing to reduce vibration. However, if the vibration amplitude of the outer barrel is too large, the barrel collision phenomenon cannot be avoided. Therefore, the measurement of the vibration displacement of the washing machine is the key to controlling the vibration and improving the...

AI Technical Summary

Problems solved by technology

In the prior art, dynamic balancing technology is used to reduce this kind of vibration. For example, a high-rigidity boom spring is used between the outer barrel and the outer casing to reduce vibration. However, if the vibration amplitude of the outer barrel is too large, the barrel collision phenomenon cannot be avoided. Therefore, the measurement of the vibration displacement of the washing machine is the key to controlling the vibration and improving the working quality of the washing machine

[0003] The traditional measurement of the vibration displacement of the washing machine requires the shell of the measuring instrument to be fixed on the bracket, and the inner end of the measuring rod is connected to the shell with a spring to make the measuring rod vertically close to the side of the outer tub of the washing machine. This design is not convenient for measurement Three-axis displacement

More importantly, due to the mechanical characteristics of the washing machine itself, there are some torsional vibration signals in addition to the vibration during the working process of the washing machine. These signals will cause distortion and deformation of the digital signal waveform of the displacement value, thus affecting the vibration displacement data of the washing machine. Authenticity, so that the collected vibration data of the outer tub of the washing machine cannot be used to control the vibration of the washing machine, which affects the improvement of the working quality of the washing machine

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