CN2348438Y

CN2348438Y - Anti-theft automatic alarm

Info

Publication number: CN2348438Y
Application number: CN 98229587
Authority: CN
Inventors: 陈小平; 王杰
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-25
Filing date: 1998-09-25
Publication date: 1999-11-10
Anticipated expiration: 2008-09-25

Abstract

The utility model relates to an anti-theft automatic alarm, which comprises a sensing part 1 and a control part for automatic dialing. The utility model is characterized in that the control part for automatic dialing is composed of a control circuit 2, a delay circuit 3, a double acoustic frequency circuit for automatic dialing 4 and a keyboard 5; the control circuit is connected to telephone network through a switch circuit of the control circuit and under the control of the delay circuit to complete off-hook action or on-hook action; the output end of an audio signal of an automatic dialer is amplified by an amplifier circuit for double acoustic frequency signals and is coupled with a telephone line. The utility model has the advantages of simple structure, reliable alarming function, small size and definite invisibility for installation.

Description

The anti-picking electric alarm device

The utility model relates to guarantor's alarm device, and is particularly a kind of at the anti-picking electric alarm device of door during by improper opening.

Many antitheft guarantor's alarm devices of the prior art can only send chimes of doom, and during noisy or unmanned, chimes of doom is difficult to play due effect when environment; In addition, existing burglar alarm is mostly by sensor, and as acoustic control sensor, light control sensor or infrared ray sensor etc., complex structure is destroyed by stealer also easily and malfunctioning.Though have the automatic paging alarm in the prior art, have following weak point:

1. the number of times that the alarm call that sends can not repeat or repeat seldom, if at that time paging station the line is busy, the user is not received report to the police the call signal;

2. alarm needs external power supply, and structure is complicated, and cost is also higher.3. many anti-picking electric alarm devices are installed in the phone, and the structure of phone is complicated, and the inconvenience of breaking down is found out and keeped in repair.

The purpose of this utility model, be to provide a kind of be arranged on door or window etc. on sensor combine, improper the opening of Yin Men or window reported to the police, and can automatically warning message be directly passed to house-owner's anti-picking electric alarm device.

Above-mentioned purpose of the present utility model, it is to realize: promptly a kind of anti-picking electric alarm device by such technical scheme, comprise Sensor section and the control section that dials automatically, it is characterized in that: the control section that dials automatically is made of control circuit, delay circuit, dual-tone automatic dialing circuit and keyboard; Control circuit comprises counting circuit, on-off circuit and gate circuit, and control circuit is connected with delay circuit by its gate circuit; Control circuit converts alerting signal to by its counting circuit 1-99 time count signal by control termination autodialer; This counting circuit count signal stops output terminal and connects on-off circuit and autodialer respectively, stops warning circuit work by it; Control circuit is connected to telephone network by its on-off circuit, and finishes off-hook or on-hook under the control of delay circuit; The autodialer audio signal output end is coupled in the telephone line after the double-audio signal amplifying circuit amplifies.

Said structure of the present utility model, the embodiment of an indefiniteness that can provide by accompanying drawing further specifies.

The utility model has following accompanying drawing:

Accompanying drawing 1 is a schematic block circuit diagram of the present utility model;

Accompanying drawing 2 is the structure principle chart of the utility model embodiment.

Referring to accompanying drawing 1, the utility model anti-picking electric alarm device comprises Sensor section 1 and the control section that dials automatically, and it is characterized in that: the control section that dials automatically is made of control circuit 2, delay circuit 3, dual-tone automatic dialing circuit 4 and keyboard 5; Control circuit comprises counting circuit, on-off circuit and gate circuit; Control circuit is connected with delay circuit by its gate circuit, and control circuit converts alerting signal to by its counting circuit 1-99 time count signal by control termination autodialer; This counting circuit count signal stops output termination on-off circuit, stops warning circuit work by it; Control circuit is connected to telephone network by its on-off circuit, and finishes off-hook or on-hook under the control of delay circuit; The autodialer audio signal output end is coupled in the telephone line after the double-audio signal amplifying circuit amplifies.

Referring to accompanying drawing 2, in embodiment of the present utility model, the composition of circuit divides five partly, i.e. sensor, control circuit, delay circuit, dual-tone automatic dialing device and keyboard.Wherein sensor can be made up of mechanical contact sensor, infrared sensor, microwave remote sensor, gas security, sound vibration sensor etc.External sensor output all with the two ends of resistance R 14 among the mode place in circuit figure of series connection, require sensor output to open a way or the form of short circuit.Decade counter that controller is made of chip U4, U5, U6 and CMOS gate circuit F1, F2, F3, F4 are by on-off circuit and the corresponding resistance that triode T1, T2, T3, T4 form, compositions such as afterflow inductance L.Delay circuit is made up of time base circuit chip U2 and outer meeting resistance thereof, electric capacity, and the delay time that provides is adjustable in second at 1-20.U1 is the dual-tone automatic dialing chip, and it is the core of whole alarm, can adopt the integrated chip of CM91215c range of models.Telephone number is that beeper number is input among the chip U1 by keyboard, and the method for input is as follows: the corresponding number of input gets final product after pressing key K2.Its principle is after the K2 key is pressed, and chip U1 is in stored condition (12 pin are low level), and will automatically successively deposit corresponding number in the memory of chip internal by chip U1 behind the corresponding number of lower keyboard this moment.

The principle of work of whole alarm is as follows: after external sensor is exported an open circuit signaling, voltage VCC produces a high level immediately on resistance R 14, F3 output this moment is in running order by high → low chip U4, U5, U6 of making, high level on the R14 also makes chip U2 in running order simultaneously, and the pulse of its output is as the counting input of chip U6.And the pulse signal of 11 pin of chip U6 output is controlled the conducting of T6 by resistance R 19 and is ended.If T6 conducting, then chip U1 sends the telephone number of one group of storage automatically, number is to go out with 8 human hair combing wastes of double-tone frequency form by U1, R16, T5, R17, R18 have formed a double-audio signal amplifying circuit among the figure, its signal amplification with the output of U1 the 8th pin is coupled in the telephone line later again, thereby finishes once automatic alarm procedure.The pulse signal of chip U6 the 4th pin output is controlled the conducting of triode T4 by resistance R 7 and is ended, thereby T3, T2, T1 are also ended and conducting thereupon.When T1, T2 conducting, LED is bright, and indication circuit is in hook state, chip U2 work; When T1, T2 ended, LED did not work, and indication circuit is in off hook state.When circuit is in off hook state, 3 pulses of the every output of chip U2, the 4th pin of U6 is just exported a pulse allows the circuit on-hook once, and the output pulse of U2 is as the counting input of U6, pulse of the every output of the 11st pin of U6 just allows U1 auto redial sign indicating number once, U5 is delivered in the carry output of U6, and U4 is delivered in the carry output of U5.Because U6 whenever finishes the action that on-hook, an off-hook redials and just exports a pulse to U5, so the count value of U5, U4 is exactly the number of times that redials.Because U5, U4 adopt the counting chip of 10 systems, be 1-99 so dial number of times, the number of times that promptly redials can be set from 1-99.After inferior the counting to of setting, the high level control gate F4 of output makes its output low level, door F2 output high level, F1 output low level that T3, T2, T1 cut-off circuit are quit work.

The power supply of alarm adopts the telephone wire power supply to obtain (but also external power supply) through voltage stabilizing, and what D1-D4 constituted among the figure is telephone wire electric power polarity discriminator circuit.

The utility model owing to described structure have simple in structure, cost is low, can not need additional power source, warning function is reliable, and the warning device volume is little, installation has certain disguise, is applicable to the warning of places such as family, financial department, office and calamity dangerous situation such as fire, gas leakage dangerous situation.

Claims

1. anti-picking electric alarm device, comprise Sensor section 1 and the control section that dials automatically, it is characterized in that: it is characterized in that: the control section that dials automatically is made of control circuit (2), delay circuit (3), dual-tone automatic dialing circuit (4) and keyboard (5); Control circuit comprises counting circuit, on-off circuit and gate circuit; Control circuit is connected with delay circuit by its gate circuit; Control circuit converts alerting signal to by its counting circuit 1-99 time count signal by control termination autodialer; This counting circuit count signal stops output termination on-off circuit, stops warning circuit work by it; Control circuit is connected to telephone network by its on-off circuit, and finishes off-hook or on-hook under the control of delay circuit; The autodialer audio signal output end is coupled in the telephone line after the double-audio signal amplifying circuit amplifies.