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Inductive proximity switch with microcontroller

A technology of proximity switches and microcontrollers, applied in electronic switches, electrical components, pulse technology, etc., can solve the problems of unfavorable material costs and permanent power requirements

Active Publication Date: 2021-10-12
IMF ELECTRONIC GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, material cost and permanent power requirements are considered unfavorable

Method used

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  • Inductive proximity switch with microcontroller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The sensor coil 1 together with the capacitor C forms a resonant circuit which is fed (ie not suppressed) by the oscillator circuit 2 which acts as a negative resistance. The figure shows a current mirror circuit which does not require a coil tap and which in the lower current mirror provides a comfortable adjustment option through a resistor RA. The upper current mirror is used for feedback. Further details are disclosed in DE 196 50 793 C1.

[0022] The evaluation circuit 3 controls the oscillator circuit 4 , in particular its amplitude, eg by means of an electronic potentiometer 7 or a resistor matrix via balancing resistors RA.

[0023] Without limiting the invention to this, the oscillator circuit 2 and the evaluation circuit 3 are accommodated together in an application-specific integrated circuit (ASIC). As mentioned above, an ASIC includes a control assembly including threshold switches (flip-flops) and a logic device, such as a microcontroller.

[0024] Sinc...

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Abstract

The invention relates to an inductive proximity switch with at least one sensor coil (1) for generating an alternating magnetic field for detecting conductive objects in a monitoring area; said proximity switch has an oscillator circuit (2) for The sensor coil (1) is fed; the evaluation circuit (3) connected to the sensor coil (1) is used to generate the binary switching signal; and the microcontroller (4) is connected to the evaluation circuit (3), wherein the switching signal is controlled by Influence of the correction value; characterized in that the storage capacitor (5) feeding the microcontroller (4) is connected via a resistor (6) to the connection point of the evaluation circuit (3) and only intermittently by the evaluation circuit (3) Charge.

Description

technical field [0001] The invention relates to an inductive proximity switch for contactless operation comprising a microcontroller according to the preamble of claim 1 . Background technique [0002] Proximity switches that operate without contact are used especially in automation technology as electronic switching devices. They have been known for a long time, and especially manufactured and distributed by applicants. [0003] They basically consist of a sensor, preferably for detecting an electrical, but also optical or other physical property of a moving object, wherein a change in the physical quantity in question is used as a measure of the approach of the object; and a control unit, which in A preferred binary switching signal is generated when a threshold value is reached. [0004] Inductive proximity switches comprise at least one sensor coil and can be operated with current pulses and with a continuous, usually sinusoidal, alternating current. The coil can be p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/95
CPCH03K17/9502H03K17/9512H03K17/954H03K2217/94031H03K2217/94042
Inventor 黑里贝特·霍斯
Owner IMF ELECTRONIC GMBH