CN2259653Y

CN2259653Y - Antitheft alarmer for glass door & window

Info

Publication number: CN2259653Y
Application number: CN 96211564
Authority: CN
Inventors: 陆育民
Original assignee: CHANGCHENG INDUSTRIAL Co Ltd DALIAN ECONOMIC DEVELOPMENT ZONE
Current assignee: CHANGCHENG INDUSTRIAL Co Ltd DALIAN ECONOMIC DEVELOPMENT ZONE
Priority date: 1996-05-17
Filing date: 1996-05-17
Publication date: 1997-08-13
Anticipated expiration: 2006-05-17

Abstract

The utility model discloses an antitheft alarm for glass doors and windows, which is composed of a glass breaking sensing circuit, a magnetic spring sensing circuit, a monostable trigger circuit, an encoder, and a wireless transmitting machine set. When a robber pushes away the windows or breaks glass or the glass is cut by a drill, the antitheft alarm can send out audio alarm signals.

Description

The glass door and window burglar alarm

The utility model relates to a kind of burglar alarm, particularly a kind of glass door and window burglar alarm.

Glass door and window burglar alarm of the prior art is made up of glass break sensors circuit and transmitting set, when the robber breaks glass, send alerting signal, do not manage after the boring of wooden or metal door frame, to unplug latch and push door and window open and go into then and can not report to the police but do not break glass as the robber.A kind of magnetic red alarm that is used for antitheft door is arranged in the prior art, and warning is sent in the magnetic red action if the robber opens the door or force open the door then, if use it for glass door and window then the robber can smash brokenly glass and enter and needn't push door and window open, so electricity can not be reported to the police.If use above-mentioned two kinds of alarms then because devices such as the transmitter, scrambler that all have in above-mentioned two kinds of equipment can not its usefulness on glass door and window simultaneously, inevitable price is more expensive and volume is bigger.Another shortcoming of prior art is that power consumption is bigger than normal, often change battery, and is very inconvenient.

Task of the present utility model provides a kind ofly can report to the police when the robber breaks glass again that to push the door and window Times open the robber alert and price is lower, the glass door and window burglar alarm that volume is less, low in energy consumption.

Task of the present utility model realizes with following mode: the glass door and window burglar alarm is made up of the broken sensing circuit of glass, magnetic red sensing circuit, single-shot trigger circuit, scrambler and radio transmitter.The triggering input end of single-shot trigger circuit is received in the output of broken sensing circuit of glass and magnetic red sensing circuit, and the output of single-shot trigger circuit connects the output control terminal of scrambler, and the output of scrambler connects the signal input part of transmitting set.

The magnetic red sensing circuit is by magnet steel CG, tongue tube HG, capacitor C ₁, resistance R ₁, R ₂, R ₃, R ₄, triode BG ₁Form.R ₁With C ₁In parallel with tongue tube HG again after the series connection, parallel circuit one end is through R ₂Ground connection, another termination power.R ₁With C ₁Interface through R ₃Meet BG ₁Base stage, BG ₁Collector through R ₄Ground wire, BG ₁Emitter connect power supply, signal is from BG ₁Collector output.

The glass break sensors circuit is by piezoelectric crystal JT, triode BG ₂, resistance R ₅, R ₆, R ₇Form.Piezoelectric crystal JT is connected across BG ₂Base stage and ground wire between, R ₅Be connected on BG ₁Base stage and power supply between, R ₆Be connected on BG ₂Base stage and ground wire between, R ₇Be connected on BG ₂Collector and ground wire between, BG ₂Emitter connect power supply, signal is exported by collector.

The frequency response range of glass break sensors be 1KHz to 5KHz, its centre frequency is that 2KHz is to 3.5KHz

Resistance R ₁With R ₂Scope for 3.9M Ω to 4.3M Ω.

Resistance R ₅Scope for 180K Ω to 230K Ω, resistance R ₆Scope for 3.9M Ω to 4.7M Ω.

When glass door and window was closed, magnet steel CG was near tongue tube HG, tongue tube closure, BG ₁Base stage is a high level, BG ₁Not conducting, no signal output.When the robber pushed door and window open, the magnet steel and the tongue tube that are contained in respectively on door and window and the door window frame left, and tongue tube disconnects, C ₁Through R ₂Discharge, BG ₁Base voltage reduces, BG ₁Conducting, its collector output high level signal.If the robber breaks glass or uses the diamond cutter glass-cutting, then piezoelectric crystal JT produces vibration voltage, BG ₂Voltage amplification is exported.BG ₁With BG ₂Output receive the triggering input end of single-shot trigger circuit, a time-delay of the output terminal output square wave of single-shot trigger circuit, this time-delay square wave controlled encoder is delivered to transmitting set with predefined coded signal, transmitting set sends alerting signal.Because the frequency response range of glass break sensors is 1KHz5KHz, centre frequency is 2K-3.5KHz, so the dither sensitivity that produces during to the broken or drilled cutter cutting of glass, and the low-frequency vibration that produces during to wind glass vibration or rain hail collision glass is insensitive, can not cause false alarm.

Because R ₁, R ₂, R ₅, R ₆Using high resistance measurement, make the quiescent current≤2 μ A of magnetic red sensing circuit and glass fragmentation sensing circuit, is little power consumption thereby make the utility model.

The utility model has the advantages that: can break or report to the police that to push the door and window Times open the robber again alert during glass-cutting the robber.Because transmitting set and coding circuit are shared, thus score from two alarm price sum is low and volume is little, and little power consumption.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is a block scheme of the present utility model.

Fig. 2 is the electrical schematic diagram of first embodiment of the utility model.

Fig. 3 is the electrical schematic diagram of second embodiment of the utility model.

In Fig. 1, the utility model is made up of the broken sensing circuit of glass, magnetic red sensing circuit, single-shot trigger circuit, scrambler and transmitting set.The triggering input end of single-shot trigger circuit is received in the output of broken sensing circuit of glass and magnetic red sensing circuit, and the output of single-shot trigger circuit connects the output control terminal of scrambler, and the output of scrambler connects the signal input part of transmitting set.

In the embodiment of Fig. 2, the magnetic red sensing circuit is by magnet steel CG, tongue tube HG, capacitor C ₁, resistance R ₁, R ₂, R ₃, R ₄, and triode BG ₁Form.R ₁With C ₁In parallel with tongue tube HG again after the series connection, parallel circuit one end is through R ₂Ground wire, another termination power.R ₁With C ₁Interface through R ₃Meet BG ₁Base stage, BG ₁Collector through R ₄Ground wire, BG ₁Emitter connect power supply, signal is from BG ₁Collector output.This routine R ₁With R ₂Resistance be 4.3M Ω.When glass door and window shut, magnet steel CG was near tongue tube HG, tongue tube closure, BG ₁No-output.When the robber pushed door and window open, the magnet steel and the tongue tube that are contained in respectively on door and window and the door window frame left mutually, and tongue tube disconnects, C ₁Through R ₂Discharge, BG ₁Base voltage reduces, BG ₁Conducting, its collector have high level signal output.This routine glass break sensors is by piezoelectric crystal JT, resistance R ₅, R ₆, R ₇, triode BG ₂Form.R ₅Resistance be 180K Ω, R ₆Resistance be 3.9M Ω.Piezoelectric crystal JT is connected across BG ₂Base stage and ground wire between, R ₅Be connected on BG ₂Base stage and power supply between, R ₆Be connected on BG ₂Base stage and ground wire between, R ₇Be connected on BG ₂Collector and ground wire between, BG ₂Emitter connect power supply.The frequency response range of glass break sensors is 1KHz-5KHz, this routine centre frequency 3KHz.When the robber breaks glass or with boring when lancinating glass, piezoelectric crystal receives vibration voltage signal that its dither produces through BG ₂Amplifying the back is exported by collector.Single-shot trigger circuit CMOS integrated circuit 4538.BG ₁With BG ₂The signal of collector output is through diode D ₁With D ₂Be added to the rising edge trigger end A of single-shot trigger circuit, R ₈Be pull down resistor, R ₉, C ₂Be used for determining the width of monostable circuit output square wave, signal is exported by inverse output terminal Q.Scrambler coding integrated circuit VD5026, its address input end A ₀-A ₇According to the geocoding difference ground wire or the positive supply of this warning, data input pin D ₀-D ₃According to the alert data code difference ground wire or the positive supply of this alarm, the Q output terminal of output control terminal TE order steady state trigger.Radio transmitter is by resistance R ₁₁, triode BG ₃, antenna TX, tuning capacity C ₃And inductance L ₁Form.When the broken sensing circuit of magnetic red sensing circuit or glass was sent signal, signal was through D ₁Or D ₂Trigger monostalbe trigger, make losing side ripple of its Q output terminal output, this losing side ripple is added to the output control terminal TE of coding circuit VD5026, and the output terminal of coding circuit is sent and given address code and the data code of setting earlier, and this code is through R ₁₁Be added to BG ₃Base stage, the antenna TX of transmitting set sends the address code of this alarm and the keying radiofrequency signal of data code.Also have battery DC and power switch K in the circuit ₁

In the embodiments of figure 3, the tongue tube of two parallel connections is arranged in the magnetic red sensing circuit, two tongue tubes are contained in the left and right sides of shell respectively, and magnet steel has only one.Purpose with two tongue tubes is to be convenient to install, no matter the left side or the right side that make magnet steel be contained in shell all have a tongue tube to work, and another tongue tube normal off can't afford to drive effect.Other parts of magnetic red sensing circuit are identical with first embodiment of Fig. 1.The glass break sensors of present embodiment has two or more, for use in the door and window of polylith glass composition.These routine single-shot trigger circuit 555 monostalbe triggers, transmitting set is touched piece with the M303S transmitter.R ₁₂, C ₄Be the timing resistor electric capacity of 555 monostalbe triggers.When the robber pushes door and window open or breaks glass, relevant sensor sends positive pulse signal, signal is added to the reverse input end of monostalbe trigger through rejection gate HF, the forward output terminal of monostalbe trigger is exported positive square wave, this positive square wave is added to the output control terminal TE of scrambler after not gate F is reverse, the output terminal of scrambler is sent the address code and the numeric data code of this alarm to the CP of M303S transmitting set end.At the same time, send a control signal that allows emission by the output terminal of 555 single-shot trigger circuits to the control end K of M303S transmitting set.So the M303S transmitting set sends the alerting signal that comprises address code and numeric data code.The frequency range of piezoelectric crystal is got 1KHz-5KHz in this example, and centre frequency is 2.5KHz.The R that this is routine ₁With R ₂Value 3.9M Ω, R ₅Value 230K Ω, R ₆Value 4.7M Ω.Other structures of this example and principle of work are with embodiment one.

Claims

1, a kind of glass door and window burglar alarm, it is characterized in that: form by the broken sensing circuit of glass, magnetic red sensing circuit, single-shot trigger circuit, scrambler and radio transmitter, the triggering input end of single-shot trigger circuit is received in the output of broken sensing circuit of glass and magnetic red sensing circuit, the output of single-shot trigger circuit connects the output control terminal of scrambler, and the output of scrambler connects the signal input part of transmitting set.

2, by the described glass door and window burglar alarm of claim 1, it is characterized in that: the magnetic red sensing circuit is by magnet steel CG, tongue tube HG, capacitor C ₁, resistance R ₁, R ₂, R ₃, R ₄, triode BG ₁Form R ₁With C ₁In parallel with tongue tube HG again after the series connection, parallel circuit one end is through R ₂Ground connection, another termination power, R ₁With C ₁Interface through R ₃Meet BG ₁Base stage, BG ₁Collector through R ₄Ground wire, BG ₁Emitter connect power supply, signal is from BG ₁Collector output.

3, by the described glass door and window burglar alarm of claim 1, its spy just is: the broken sensing circuit of glass is by piezoelectric crystal JT, triode BG ₂, resistance R ₅, R ₅, R ₇Form, piezoelectric crystal JT is connected across BG ₂Base stage and ground wire between, R ₅Be connected on BG ₁Base stage and power supply between, R ₅Be connected on BG ₂Base stage and ground wire between, R ₇Be connected on BG ₂Collector and ground wire between, BG ₂Emitter connect power supply, signal is exported by collector.

4, by claim 1 or 2 or 3 described glass door and window burglar alarms, it is characterized in that: the frequency response range of glass break sensors is 1KHz-5KHz, and centre frequency is 2KHz3.5KHz.

5, by claim 1 or 2 described glass door and window burglar alarms, it is characterized in that: resistance R ₁, R ₂Scope for 3.9M Ω to 4.3M Ω.

6, by claim 1 or 3 described glass door and window burglar alarms, it is characterized in that: R ₅Scope for 180K Ω to 230K Ω, R ₆Scope for 3.9M Ω to 4.7M Ω.