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Capacitance bridge type human body proximity alarm

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

Inactive Publication Date: 2015-04-29
XIAN ZAOXIN ELECTRONICS INFORMATION TECH
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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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  • Capacitance bridge type human body proximity alarm

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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 protection and electronic monitoring, and relates to a capacitance bridge type human body proximity alarm. The alarm comprises a 220V alternating-current power supply, a 12V direct-current power supply, a capacitance bridge circuit, a signal detection circuit, a signal amplification circuit and a sound-light alarm circuit. As certain finished monitoring devices or facilities in the market have certain defects, the capacitance bridge type human body proximity alarm is designed for solving the problems of certain defects, relatively high price and the like of various monitoring devices in the market. The monitoring alarm is used for detecting whether a human body enters a fortification region or not, and has the main functions and effects that firstly, monitoring modes are flexible and diversified and cannot be limited by factors such as the size of a monitoring region or the properties of an article; secondly, when a warning occurs, the sound-light alarming action of the monitoring device is quickly generated; thirdly, the problems of false alarming of non-substantial dangerous cases, missed alarming of dangerous cases and the like are solved; fourthly, the four monitoring channels of the alarm can be simultaneously used or part of the monitoring channels are used as needed.

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): G08B13/26G08B7/06
CPCG08B13/26G08B7/06
Inventor 不公告发明人
Owner XIAN ZAOXIN ELECTRONICS INFORMATION TECH
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