Method for detecting eccentric load of roller washing machine by vibrating sensor

Abstract

The invention relates to a method for detecting an eccentric load of a roller washing machine by a vibrating sensor. The front-most part or the rearmost part of the outer edge of the outer barrel of the roller washing machine is provided with the vibrating sensor; by utilizing an amplitude and phase relation between vibrations measured in two directions, the vibration state of the outer barrel is judged; a vibration value is tested while rotate speed variation or eccentric weight are tested by adopting an original eccentric load detection method; according to the vibration state of the outer barrel, the distribution of the eccentric load in a roller is judged, and a preset value of the eccentric load is adjusted, and therefore, the weakness that dynamic eccentricity cannot be detected by adopting the original eccentric detection method is overcome. The detection and the protection of the dynamic eccentricity are added, and therefore, the detection precision of the eccentric load is improved, the vibrations and noise when drying is performed are reduced, and the product grade of the rolling washing machine is improved.

Description

technical field [0001] The invention relates to a drum washing machine, in particular to a method for detecting an eccentric load of a drum washing machine by a vibration sensor. Background technique [0002] Because the rotation axis of the drum washing machine is horizontal or close to horizontal, the clothes are always mainly distributed in the lower half of the drum under the action of gravity before entering the dehydration process. After the dehydration process starts, the drum of the washing machine starts to rotate, and the clothes gradually stick to the wall of the drum. However, the distribution state of the clothes attached to the wall of the tube has great randomness, and it is difficult to achieve uniform distribution. The uneven distribution of clothes and the high-speed rotation of the drum during dehydration will cause the drum to be subjected to unbalanced centrifugal force, which can cause severe vibration of the whole machine. This kind of vibration of t...

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Problems solved by technology

Elastic force, damping force and mechanical structure, such as door seal 4, suspension spring 6, shock absorber 2 and other components (such as figure 1 shown) has a lot to do with it. Therefore, at medium and low speeds, the vibration amplitude of the outer barrel 3 is greatly affected by the mechanical structure, and the amplitude of the outer barrel 3 cannot correctly reflect the size of the eccentric load in the drum. For example, the same The amplitude of the eccentric distribution in the front of the drum (near the door seal 4) is much smaller than that in the rear of the drum. Therefore, the current method of detecting the eccentric load by the vibration sensor in the drum washing machine cannot accurately judge the size and state of the eccentric load. It can't replace the method of detecting eccentric load with the amount of speed change, etc. At present, the vibration sensor is mainly used to stop dehydration in time when abnormal vibration occurs, so as not to allow this damage to continue

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