Non-contact sensor switch based on Hall and logic magnetic coding technology

Abstract

The invention relates to a non-contact sensor switch based on Hall and logic magnetic coding technology, which comprises a non-contact sensor circuit and a packaging shell thereof, the non-contact sensor circuit comprises a relay, the relay comprises an input end and an output end, the contactless sensor circuit controls the relay to realize conduction or blocking through an AND logic operation circuit and a NOT gate circuit which are formed based on N single-stage Hall elements, and the AND logic operation circuit forms a logic magnetic password through the N single-stage Hall elements according to the direction, position and number of magnetic poles. The open-drain output characteristics of only one pull-up resistor and a plurality of single-pole non-latch Hall elements are shared, logic magnetic codes are formed through the magnetic pole directions, the positions and the number of the single-pole non-latch Hall elements, magnetic coding of the relation between self-composition and logic operation of the multiple Hall elements is achieved, and the purposes of being small, stable, reliable, rapid and convenient are achieved.

Description

technical field [0001] The invention relates to the field of sensor switches, in particular to a non-contact sensor switch based on Hall and logic magnetic encoding technology. Background technique [0002] The Hall effect was discovered by the American physicist Hall in 1879 when he was studying the mechanism of metal conduction: an external magnetic field perpendicular to the conductor current can cause a potential difference at both ends of the conductor current direction. This phenomenon is called the Hall effect. The application of the Hall effect is mostly used in the field of switches. Because the Hall sensor has the characteristics of non-contact, it can be used in some switches that require airtightness, waterproof, and extended life, especially in gear switches. Rotate to trigger the Hall sensors in different gears to enable the functions of different gears. [0003] Hall components need to be in close contact with the magnetic induction corresponding to the magne...

AI Technical Summary

Problems solved by technology

For example, the IDEM brand magnetic code interlock switch of the European Community does not form a logical operation relationship with the three Hall elements used. One of the switches can easily trigger the action with only a single magnet, although the other two Hall elements form a It is related to logic, but because the number is too small and only two Hall elements, the sensor can also be triggered by the north and south poles of a magnet at the same time, so the magnetic coded sensor of this brand has a low level of confidentiality

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