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Capacitive bridge mode human body approach alarm

A technology of human body proximity and capacitive bridge, which is applied in the field of electronic monitoring and security, can solve the problems of false alarms of insubstantial dangers, missed alarms of dangers, high prices, etc., and achieve the effect of flexible and diverse monitoring methods

Inactive Publication Date: 2011-12-21
刘昭利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose and beneficial effects of the invention: Some finished monitoring devices or facilities on the market have certain defects. The present invention is designed to solve or make up for the problems of some defects and higher prices of various monitoring devices on the market.
[0008] 3. Solve the problems of misreporting of non-substantial dangers and missed reporting of dangerous alerts;

Method used

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  • Capacitive bridge mode human body approach alarm
  • Capacitive bridge mode human body approach alarm

Examples

Experimental program
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Embodiment Construction

[0020] According to attached figure 1 The circuit working principle diagram and accompanying drawings of the human body proximity alarm in the form of a capacitor bridge are shown, and the connection relationship between the components in each part of the circuit described in the summary of the invention, and the component technology described in the implementation mode Parameter requirements are implemented to implement the invention.

[0021] Selection of components and their technical parameters

[0022] C1~C4 are high-frequency ceramic capacitors with a capacity of 100PF. The four capacitors C1~C4 are required to have the same capacity and withstand voltage ≥ 400V; C5 is a filter capacitor, and the capacity of the electrolytic capacitor is required to be 470μF / 25V;

[0023] D1~D4 are Schottky diodes, which require withstand voltage ≥ 20V; D5 is an ordinary silicon rectifier diode, the model is 1N4001; the LED is a ￠5 red light-emitting diode;

[0024] VT1 is a PNP type s...

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Abstract

The invention belongs to the technical field of security and electronic monitoring, and relates to a human body proximity alarm in the form of a capacitor bridge. The alarm is composed of 220V AC, 12V DC power supply, capacitive bridge circuit, signal detection circuit, signal amplification circuit and sound and light alarm circuit. There are certain defects in some finished monitoring devices or facilities in the market, and the present invention is designed to solve or make up for the problems of some defects and higher prices of various monitoring devices in the market. The present invention is a monitoring and alarming device for detecting whether a human body enters a fortified area. , the sound and light alarm actions of the monitoring device are crisp and neat; 3. Solve the problems of false alarms without substantial dangers and missed alarms with dangerous alarms; 4. The alarm has 4 monitoring channels that can be used at the same time, or according to Some monitoring channels are required.

Description

technical field [0001] The invention belongs to the technical field of security and electronic monitoring, and relates to a human body proximity alarm in the form of a capacitor bridge. Background technique [0002] There are many types of monitoring and alarm devices on the market. The main ways to obtain alarm information are: first, the infrared sensor with the largest market share is an alarm made of a probe (pyroelectric effect device plus Fresnel lens); The representative ones are alarms made of anti-vibration, anti-prying, and anti-noise vibration displacement sensors; the third is a small number of alarms made with touch, induction probes, and microwave probes. Although the dominance and active role of these alarms in many fields of prevention cannot be questioned, they do have some problems in actual use. [0003] There are certain defects in some finished monitoring devices or facilities in the market, and the present invention is designed to solve or make up for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B13/26
Inventor 刘昭利
Owner 刘昭利
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