HALL sensor applied for determining washing machine barrel bias

Abstract

The invention relates to a new type HALL sensor used for judging the excursion of the washing barrel. The sensor comprises a always magnet 1, a circuitry board 2, a HALL element 3, and a case 4, wherein the element 3 is jointing fixed on the circuitry board 2 which is placed between the always magnet 1. The two ends of the two pole of the magnet 1 each have a tuber part in the shape of mosque. Theinvention is used in checking the position of the washing barrel. Compared with present checking elements, the sensor avoids bumping caused by without a judgment clear extreme point. The process of the identifying and the disposal is easy to control and can also used in other similar situation.

Description

technical field [0001] The invention relates to a displacement sensor, in particular to a novel HALL (Hall) sensor applied to the bias judgment of a washing machine barrel, belonging to the field of sensor technology. Background technique [0002] When a metal or semiconductor thin sheet with current is placed vertically in a magnetic field, an electromotive force will be generated between the two sides of the thin sheet. This phenomenon is called the Hall effect. The Hall element is made on the basis of the Hall effect principle. Because the Hall potential generated by the semiconductor material is relatively large, the materials of the Hall element mainly include semiconductor materials such as germanium, silicon, arsenide, indium arsenide, and indium antimonide. [0003] Although the Hall potential generated by semiconductor materials is larger than that of metal materials, it needs to be amplified in practical applications. Using integrated circuit technology to integra...

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Problems solved by technology

[0009] There is also a linear HALL method, using a linear HALL sensor, because the permanent magnet section in this sensor is tapered (see Figure 5 ), the formed magnetic field strength changes linearly in the moving direction of the HALL sensing element, so the output curve of the induced signal is as follows: figure 1 As shown, using this sensor can easily detect the deflection of the barrel, and it can be used in frequency conversion washing machines to achieve the purpose of coordinated operation of the speed and dehydration state. However, this sensor has disadvantages when used in ordinary washing machines, because there is no clear extreme value Points are used to judge whether a barrel collision occurs. The signal recognition process is complicated and not easy to control; in addition, even in the frequency conversion machine, it is not very convenient to judge the extreme value of the barrel collision

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