Integrated Hall-effect sensor

Abstract

The invention relates to an integrated Hall-effect sensor, which is applied to the fields such as distance detection, speed detection, angle detection, rotate speed detection and the like, specifically applied to the fields of automobile cam and crank speed / position detection, an automobile and industrial autometers, treadmills, automatic control, textile machinery and the like. The integrated Hall-effect sensor comprises a Hall element and a lead group. The pins of the Hall element are connected with the lead group, mutually matched bracket and hollow shell are also arranged on the Hall-effect sensor, and the Hall element is fixed in the bracket which is fixed in a cylindrical hollow shell which is magnetically tempered. The invention has the advantages of small volume, wide application range, simple production and installation, integrally packaged magnetic steel shell, high overall reliability, strong shake resistance, strong interference resistance and good consistency.

Description

Technical field [0001] The invention relates to an integrated integrated Hall effect sensor, which is used in the fields of distance detection, speed detection, angle detection, rotation speed detection and the like. Specifically, it can be applied to automobile cam and crankshaft speed / position detection, automobile and industrial speedometers, treadmills, automatic control, textile machinery and other fields. Background technique [0002] The Hall effect sensor uses the Hall element to generate a signal from the change in the magnetic field at its location. The Hall effect sensor has a wide range of uses. It can be used to measure the distance, displacement and position of an object. It is used in modern industry and ordinary life. Plays an important role. The accuracy of its detection data, extremely high stability and flexibility requirements make many sensor manufacturers prohibitive. The existing Hall-effect sensors are generally of external magnetic type. The magnetic bl...

AI Technical Summary

Problems solved by technology

The existing Hall effect sensor is generally of the external magnetic type. There is no magnetic block installed at the position of the Hall effect sensor, but a magnetic block is provided corresponding to the mechanical device that moves relative to it. Therefore, the current Hall effect sensor Sensors are usually sold with a magnetic strip made of powder metallurgy material, and the installation is subject to certain restrictions, and for machine tools where sensors are widely used, the installation is even more difficult! Poor anti-interference ability, dust and oil interference, resulting in inaccurate detection signals, prone to misoperation, poor anti-vibration effect

And the current hall effect sensor with built-in magnetic steel also has its obvious deficiencies, such as the patent ZL02112326. A Hall element, the magnetic block is arranged on both sides of the Hall element according to the magnetic opposite, the Hall element and the magnetic block are packaged in the front end of the same housing, and the front wall of the housing is a non-magnetic material, another type of the patent The way to realize it is to use two Hall elements, set the sensing surface back to back, and face the two Hall elements facing forward and backward respectively. When the magnetizer approaches or leaves from the front of the housing, the two Hall elements will The increase or decrease of the magnetic field is sensed separately, thus forming a differential output mode

However, this design needs to use two magnets plus one Hall element or four magnets plus two Hall elements to be packaged in the shell. The production and installation are slightly complicated, the volume is large, and the cost will be high.

Therefore, the scope of use is relatively narrow, and the magnetic steel is separated from the housing, and the magnetic steel and the Hall element must be in a fixed position, and the switch point cannot be adjusted.

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