Dual redundancy inductive proximity sensor

Abstract

The invention provides a dual-redundancy inductance type proximity sensor. The double-channel inductance type sensor is high in sensitivity and capacity of resisting disturbance and capable of measuring large displacement. According to the technical scheme, two independent detection coil combinations are inserted into two pins of a door-shaped iron core and two pins of the other door-shaped iron core respectively to form two sensing part assemblies (14) which are together placed inside the same rectangular cavity of a rectangular metal shell (5). The end faces of openings of iron core bodies (1) of the two sensing part assemblies are tightly attached to the inner surface of the inducing face (9) of the shell. Three pins of a socket lead out two output signals and a shared connecting line, two leads (12) which are arranged on the two sensing part assemblies respectively are connected with the insertion pins A of the socket (4), and another two leads which are arranged on the two sensing part assemblies respectively are connected with the insertion pin B and the insertion pin C of the socket respectively. Two inductance signals are output at the same time, the inductance signals comprise AB output and AC output, so that dual-redundancy channels are formed. The two similar and independent signals can be provided at the same time.

Description

technical field [0001] The invention relates to a high-reliability dual-redundancy inductive proximity sensor mainly used for measuring a relatively large distance between a moving object and a target (the approach point is ≤6mm). Background technique [0002] An inductive proximity sensor is a device capable of sensing the proximity of an object. In the prior art, the inductive proximity sensor, which consists of three parts, an inductive component, a housing, and an electrical connector, is a product that utilizes the sensor's sensitivity to approaching ferromagnets to identify the approaching distance of an object and output a signal of inductance change. The signal of this product is solved by different chips, which can form a continuous quantity curve or a one-point switch quantity. Its inductive components are mainly composed of detection coils and magnets. In theory, according to Faraday's law: current flowing through the coil will generate a magnetic field, and at ...

AI Technical Summary

Problems solved by technology

In the existing technology, due to the serious mutual interference of inductive signals and the constraints of volume and weight, there are few literature reports on this kind of inductive proximity sensors in my country.

However, when the shape is determined and the volume is small, the greater the test distance, the greater the technical difficulty, which adds to the difficulty of developing this type of sensor

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