CN102419886A

CN102419886A - Capacitance human body approach alarming control device

Info

Publication number: CN102419886A
Application number: CN2011104173383A
Authority: CN
Inventors: 陈子杨; 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-13
Filing date: 2011-12-13
Publication date: 2012-04-18

Abstract

The invention relates to a capacitance human body approach alarming control device. The alarming control device comprises a 220V alternating current power supply, a 12V direct current power supply, a capacitance bridge circuit, a differential pressure signal detecting circuit and a differential pressure signal amplifying and alarming control circuit, wherein the capacitance bridge circuit comprises capacitors C1-C4; the differential pressure signal detecting circuit comprises Schottky diodes D1-D4; certain defects exist in certain finished product monitoring devices or facilities on the market; and the capacitance human body approach alarming control device is designed in order to solve or make up the certain defects existing in various monitoring devices on the market, higher selling prices and other problems. The capacitance human body approach alarming control device is mainly used for detecting whether a human body approaches a fortification area, is flexible and various in the monitoring mode and is not limited by factors such as the size of monitoring areas or properties of articles and the like; when certain cases happen, the alarming device acts dexterously and solves the problems of misinformation of non-substantiality conditions and failed reporting of dangerous warning conditions; four monitoring passageways can be simultaneously used; and a part of monitoring passageways can be used according to the need.

Description

The condenser type human body is near ACU alarm control unit

Technical field

The invention belongs to the electronic monitoring technical field, is near ACU alarm control unit about a kind of condenser type human body.

Background technology

Monitoring alarm device kind on the market is a lot, and what occupation rate was maximum will count the alarm that infrared sensor is made for probe (the pyroelectric effect device adds Fresnel Lenses).Though leading position and positive role that this IR intrusion detector is taken precautions against in a lot of fields are undoubted, also there are some problems in actual use in they.

The present invention exists some shortcoming and price to design than problem such as height in order to solve or remedy all kinds of on the market supervising devices.

Condenser type human body of the present invention is through the kinds of schemes test, compares and analysis near ACU alarm control unit, and the present invention only uses the small quantities of usual electronic component to realize intended purposes.Below specify the relevant manufacturing technology of this condenser type human body near ACU alarm control unit.

Summary of the invention

Goal of the invention and beneficial effect: some finished product supervising device or facility exist certain defective on the market, and the present invention exists some shortcoming and price to design than problem such as height in order to solve or remedy all kinds of on the market supervising devices.The present invention is mainly used in and surveys the zone of setting up defences whether the approaching a kind of monitoring alarm device of human body is arranged, and major function and effect have:

Monitor mode is versatile and flexible, does not receive effects limit such as guarded region size or article character;

When there is something special, the action of alarm device was clear-cut, agile;

The wrong report and the dangerous alert that solve no substantive situation are failed to report problem;

4 monitor channels can use simultaneously, also can use the part monitor channel as required.

The circuit working principle: this condenser type human body adopts the capacitance bridge mode as triggering control near ACU alarm control unit; Because the capacity of 4 electric capacity equates; So a, 2 current potentials of b are in balance in the accompanying drawing 1; 4 full bridge rectifier no signal outputs that schottky diode D1～D4 forms, at this moment PNP transistor VT1 is in cut-off state, and red light emitting diodes LED does not work.When bridge diagram that human body is formed near 4 capacitor C 1～C4; Because the inductive action of human body distributed capacitance has been broken 4 electric capacity and formed the original equilibrium state of bridge diagram, the distributed capacitance of human body makes the increase of any 1 capacitance in 4 electric capacity; The current potential that all can make 2 of a, b is balance no longer; Schottky diode D1～D4 full bridge rectifier just has differential pressure signal output, makes PNP transistor VT1 conducting, makes that red light emitting diodes LED is lighted, the relay J adhesive.This ACU alarm control unit can be provided with 4 monitor channels simultaneously or the part monitor channel is set.

The 12V direct supply is made up of power transformer B, silicon rectifier diode D5 and filter capacitor C5, and the 220V alternating current is through power transformer B step-down, after silicon rectifier diode D5 and the electrochemical capacitor C5 filtering, for ACU alarm control unit provides 12V direct supply.

Technical scheme: the condenser type human body is made up of 220V AC power, 12V direct supply, condenser type bridge diagram, pressure difference signal testing circuit, pressure difference signal amplification and alarm control circuit near ACU alarm control unit, and its characteristic comprises:

The condenser type bridge diagram: 1～C4 forms by capacitor C; The live wire end L of one termination 220V AC power of one end of capacitor C 1 and capacitor C 3; The a point of another termination pressure difference signal testing circuit of capacitor C 1, the b point of another termination pressure difference signal testing circuit of capacitor C 3; The zero line side N of one termination 220V AC power of one end of capacitor C 2 and capacitor C 4, a point of another termination pressure difference signal testing circuit of capacitor C 2, the b point of another termination pressure difference signal testing circuit of capacitor C 4;

The pressure difference signal testing circuit: D1～D4 forms full bridge rectifier by schottky diode, and the cathode output end of full bridge rectifier connects the base stage of PNP transistor VT1, the cathode output end connection circuit ground GND of full bridge rectifier;

Pressure difference signal amplifies and the alarm control circuit: be made up of PNP transistor VT1, red light emitting diodes LED, resistance R 1 and relay J; The base stage of PNP transistor VT1 connects the cathode output end of full bridge rectifier; The emitter of PNP transistor VT1 connects the negative pole of red light emitting diodes LED and an end of relay J coil; The end of the anodal connecting resistance R1 of red light emitting diodes LED; The anodal VCC of the other end connection circuit of the other end of resistance R 1 and relay J coil, the emitter connection circuit ground GND of PNP transistor VT1.

12V direct supply: form by power transformer B, silicon rectifier diode D5 and filter capacitor C5; The primary coil L1 of power transformer B connects the 220V AC power; The positive pole of the termination silicon rectifier diode D5 of the secondary coil L2 of power transformer B; The anodal VCC of the anodal connection circuit of the negative pole of silicon rectifier diode D5 and filter capacitor C5, the negative pole connection circuit ground GND of the other end of the secondary coil L2 of power transformer B and filter capacitor C5.

Description of drawings

Accompanying drawing 1 is that the present invention provides the embodiment circuit working schematic diagram of a condenser type human body near ACU alarm control unit; The negative pole of the 12V direct supply in the accompanying drawing 1 links to each other with circuit ground GND.

Embodiment

According to circuit working schematic diagram and the description of drawings put near the control of alarm dress with the condenser type human body shown in the accompanying drawing 1; And connect according to the relation between the components and parts in the described each several part circuit of summary of the invention, and the components and parts technical parameter described in the embodiment requires to implement to realize the present invention.

The selection of components and parts and technical parameter

C1～C4 is the high frequency Leaded Ceramic Disc Capacitor, and capacity is 100PF, requires the capacity of 4 capacitor C 1～C4 to equate fully and withstand voltage >=400V; C5 is an electrochemical capacitor, and the capacity that requires electrochemical capacitor is 470 μ F/25V;

D1～D4 is a schottky diode, requires withstand voltage >=20V; D5 is the ordinary silicon commutation diode, and model is 1N4001; LED is ￠ 5 red light emitting diodes; The resistance of resistance R 1 is 910 Ω;

VT1 is a PNP transistor, selects model 2SC9012 for use, requires β >=240;

B is a power transformer, and primary coil L1 voltage is 220V, and secondary coil L2 voltage is 15V, power requirement >=2W; The WV of relay J is 10～12V.

The circuit production main points: 4 capacitor C 1～C4 capacity requirement are equal fully, otherwise the current potential of 2 of a on the pressure difference signal testing circuit, b can not keep equipotential; And the capacity of 4 capacitor C 1～C4 can not be greater than 10% of nominal capacity, otherwise influences the sensitivity of human body sensing; For improving the sensitivity of pressure difference signal testing circuit, 4 diode D1～D4 must use the very little schottky diode of forward voltage drop, otherwise will influence the sensitivity of pressure difference signal testing circuit significantly.

Circuit debugging: the condenser type human body near the circuit of ACU alarm control unit so long as the electronic devices and components performance of using is intact; Annexation welding according to components and parts shown in the accompanying drawing 1; And to physics wiring conscientiously check, check errorless after, circuit need not debugged basically can operate as normal;

In the debugging if after finding that circuit is connected the 220V AC power; Red light emitting diodes LED and relay J are just started working; The current potential that 2 of a in the circuit, b are described is unequal, can any two among capacitor C 1～C4 be exchanged, or detects the capacity of 4 capacitor C 1～C4 with capacitance meter again.

Install and method of application: require to be connected the wire length≤4m of 4 each monitor channels of capacitor C 1～C4, otherwise will influence the reliability of ACU alarm control unit; To pay special attention to safety during installation; Because of the work of ACU alarm control unit is to influence the capacitance bridge balance through the induction of human body distributed capacitance; So, require when mounted 4 capacitor C 1～C4 (4 monitoring probes) are used wrapped with insulation, in case electric shock accidents takes place.

Claims

1. a condenser type human body is made up of 220V AC power, 12V direct supply, condenser type bridge diagram, pressure difference signal testing circuit, pressure difference signal amplification and alarm control circuit near ACU alarm control unit, and its characteristic comprises:

The condenser type bridge diagram is made up of capacitor C 1～C4, the live wire end L of a termination 220V AC power of an end of capacitor C 1 and capacitor C 3, a point of another termination pressure difference signal testing circuit of capacitor C 1, the b point of another termination pressure difference signal testing circuit of capacitor C 3; The zero line side N of one termination 220V AC power of one end of capacitor C 2 and capacitor C 4, a point of another termination pressure difference signal testing circuit of capacitor C 2, the b point of another termination pressure difference signal testing circuit of capacitor C 4;

The pressure difference signal testing circuit is formed full bridge rectifier by schottky diode D1～D4, and the cathode output end of full bridge rectifier connects the base stage of PNP transistor VT1, the cathode output end connection circuit ground GND of full bridge rectifier;

Pressure difference signal amplifies and the alarm control circuit is made up of PNP transistor VT1, red light emitting diodes LED, resistance R 1 and relay J; The base stage of PNP transistor VT1 connects the cathode output end of full bridge rectifier; The emitter of PNP transistor VT1 connects the negative pole of red light emitting diodes LED and an end of relay J coil; The end of the anodal connecting resistance R1 of red light emitting diodes LED; The anodal VCC of the other end connection circuit of the other end of resistance R 1 and relay J coil, the emitter connection circuit ground GND of PNP transistor VT1.

2. condenser type human body according to claim 1 is near ACU alarm control unit; It is characterized in that: the 12V direct supply is made up of power transformer B, silicon rectifier diode D5 and filter capacitor C5; The primary coil L1 of power transformer B connects the 220V AC power; The positive pole of the termination silicon rectifier diode D5 of the secondary coil L2 of power transformer B; The anodal VCC of the anodal connection circuit of the negative pole of silicon rectifier diode D5 and filter capacitor C5, the negative pole connection circuit ground GND of the other end of the secondary coil L2 of power transformer B and filter capacitor C5.