Non-contact absolute position knob

Abstract

The invention relates to a non-contact absolute position knob, which comprises an inductive switch circuit board and an inductive knob, wherein the inductive switch circuit board and the inductive knob are respectively placed at two sides of an operation panel. The non-contact absolute position knob is characterized in that the inductive knob comprises an inductive permanent magnet, a first annular locating permanent magnet and a rotary knob base, wherein an N pole and an S pole of the inductive permanent magnet are arranged on one cylindrical surface at a central position and are centrally symmetrical; the first annular locating permanent magnet is arranged outside the inductive permanent magnet; the rotary knob base is used for fixing the inductive permanent magnet and the first annular locating permanent magnet; a second annular locating permanent magnet, a magnetic induction element capable of detecting rotation of the inductive permanent magnet to generate magnetic variation and an MCU (Micro Control Unit) unit connected to the magnetic induction element and used for computing a rotation angle of the inductive knob are arranged on the inductive switch circuit board. The non-contact absolute position knob has the advantages of novel structure, linear rotation angle position detection and no need to open a hole on electrical equipment.

Description

technical field [0001] The invention relates to a switch knob, in particular to a non-contact absolute position knob. Background technique [0002] Most of the existing switch knobs are physically connected switch knobs, such as potentiometer-type switch knobs and bar-coded switch knobs. This kind of physically connected knobs will not only affect the service life due to the wear and tear of the mechanical structure during use, but also physically connect When the knob is used, it is necessary to open holes on the panel of the electrical equipment, destroying the integrity and sealing of the equipment shell, resulting in a greatly weakened panel's stress strength, and also causing pollutants outside the equipment to enter the interior of the equipment, which is harmful to the equipment. The internal parts and circuits constitute pollution and damage, and also hinder the cleaning of the panel to a certain extent. [0003] For this reason, people have proposed a kind of induc...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing switch knobs are physically connected switch knobs, such as potentiometer-type switch knobs and bar-coded switch knobs. This kind of physically connected knobs will not only affect the service life due to the wear and tear of the mechanical structure during use, but also physically connect When the knob is used, it is necessary to open holes on the panel of the electrical equipment, destroying the integrity and sealing of the equipment shell, resulting in a greatly weakened panel's stress strength, and also causing pollutants outside the equipment to enter the interior of the equipment, which is harmful to the equipment. The internal parts and circuits constitute pollution and damage, and also hinder the cleaning of the panel to a certain extent

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