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Induction type proximity switch

A proximity switch, inductive technology, applied in the field of electronic control, can solve the problem of unreliable working performance of the human body pyroelectric infrared monitoring device, and achieve the effect of making up for the high price

Inactive Publication Date: 2012-04-04
刘德军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The working performance of the pyro-infrared monitoring device used or installed outdoors in summer is not reliable enough

Method used

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  • Induction type proximity switch
  • Induction type proximity switch

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Experimental program
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Effect test

Embodiment Construction

[0013] Follow the instructions below figure 1 With reference to the accompanying drawings, the related technologies and production points of the present invention will be further described in conjunction with the following embodiments.

[0014] Selection and production of components

[0015] 1. Induction electrode: The thickness of the induction electrode can be 1mm aluminum plate or copper plate. The size of the induction electrode is required to be 100mm wide and 150mm long. The geometry of the induction electrode can also be determined according to the needs. Appropriately larger.

[0016] 2. For other component parameters, see the component name and technical parameter table.

[0017] Part number

Component name

technical parameter

quantity

Remark

BG1

Plastic encapsulated NPN type silicon transistor

2C89018、β≥100

1

BG2

Plastic encapsulated NPN type silicon transistor

2C89014、β≥200

1

D1, D2 ...

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PUM

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Abstract

The invention relates to an induction type proximity switch, which is composed of a 12 V Direct Current (DC) power supply, an induction electrode and a radio frequency oscillation circuit, a voltage multiplying detection circuit and a DC signal amplifying and controlling circuit, wherein the induction electrode and the radio frequency oscillation circuit are composed of an induction electrode, a silicon triode BG1, an inductance coil L1, an adjustable capacitor C2, a resistor R1, a capacitor C1 and a load resistor R2. The induction type proximity switch disclosed by the invention is mainly used for detecting, controlling through circuit, or monitoring whether a human body or a metallic object gets close to a fortified region; the induction type proximity switch is simple and reliable in circuit design structure and is made by using common electronic elements; the induction type proximity switch can be used either as a proximity switch on the engineering control aspect, or as a monitoring preceding stage of electronic security products, thus making up the problems that various monitoring devices are defective, relatively high in cost, and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic control and relates to an inductive proximity switch. Background technique [0002] There are many kinds of control devices for conductors or human bodies, and the most representative one is a monitoring device made with an infrared sensor as a probe (with a pyroelectric effect device plus a Fresnel lens); the other is a monitoring device made with a microwave probe. [0003] It is not reliable enough to use or install the pyro-infrared monitoring device outdoors in summer. An intruder who is familiar with the working principle of the infrared probe can try to use the dead angle of the probe to close or destroy the alarm from the side or back of the infrared probe, thereby entering the infrared detection and prevention area. The infrared probe cannot respond to objects that do not move or emit infrared heat. Intruders can use sticks to change the detection area of ​​the infrared probe. [000...

Claims

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Application Information

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IPC IPC(8): H03K17/945
Inventor 刘德军黄勇
Owner 刘德军
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