Hall self-adaptive sensor

Abstract

The invention relates to a Hall self-adaptive sensor. The Hall self-adaptive sensor is used for detecting speed and rotation speed, and is particularly applied to the fields of gear position detection, speed detection, camshaft detection and direction detection for an engine. The Hall self-adaptive sensor is characterized by comprising a voltage-reduction voltage-stabilizing structure, a Hall sensing head, an amplifier, a self-adaptive logic structure, a comparator, a hysteresis comparator and an output circuit, wherein the voltage-reduction voltage-stabilizing structure, the Hall sensing head, the amplifier, the comparator, the hysteresis comparator and the output circuit are sequentially connected; and the self-adaptive logic structure is connected with the comparator. The Hall self-adaptive sensor has the advantages of reasonable structural design, high reliability, capability of self-adapting and convenience in detection of zero speed.

Description

technical field [0001] The invention relates to a Hall adaptive sensor, which is a Hall adaptive sensor used for speed detection and rotational speed detection. It is specifically used in the fields of engine gear position detection, speed detection, camshaft detection, and direction detection. Background technique [0002] Where there is rotation, gears are needed, and half of the places with gears need non-contact gear sensors. Since non-contact sensing is required, most gear sensors need to be equipped with a magnet to work. However, the different gears and camshafts used in various fields of detection require different magnetic steels, which causes great inconvenience to the actual operation of the factory. [0003] Most of the gear sensors currently on the market are less adaptable to the magnetic field of magnetic steel due to the difference in gear size and tooth spacing. There are several sensors that are more adaptable to the magnetic field, and there are also pro...

AI Technical Summary

Problems solved by technology

However, the gears and camshafts used in various fields are different, and the required magnetic steel is also different, which causes great inconvenience to the actual operation of the factory.

[0003] Most of the gear sensors currently on the market are less adaptable to the magnetic field of magnetic steel due to the difference in gear size and tooth spacing. There are several sensors that are more adaptable to the magnetic field, and there are also problems such as zero-speed detection, or, Sensors using zero-point floating technology are easy to saturate, and can only be used to remove offset noise errors, and the problem of low sensitivity and sensing distance

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