CN201072582Y

CN201072582Y - Electric anti-theft alarm device of external equipment

Info

Publication number: CN201072582Y
Application number: CNU2007200082026U
Authority: CN
Inventors: 黄育平
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-12
Filing date: 2007-09-12
Publication date: 2008-06-11
Anticipated expiration: 2017-09-12

Abstract

The utility model discloses an electronic burglar alarm device of an exterior device, which comprises an external detector, a signal transmission wire and an alarm signal processor. An output terminal of the external detector is connected with an input terminal of the alarm signal processor by the signal transmission wire; the alarm signal processor is provided with an external signal detecting module, a signal processor and a sound alarm device; the external detector is provided with an electronic switch, wherein, the external detector is internally mounted with a signal generator module connected with the electronic switch in series or in parallel; the circuit component in the external detector adopts isolation materials for encapsulation. By adopting the structure, the external detector is arranged on the exterior devices; when the external detector is dismantled or the signal transmission wire is broken and shortened, or the external detector is dismantled and damaged, or the exterior devices are detected not in designated areas, the output signals of the external detector are changed, the alarm signal processor is triggered to alarm and the perfect protection function against damage is realized.

Description

A kind of burglar alarm of external device

Technical field

The utility model relates to a kind of burglar alarm, relates in particular to a kind of burglar alarm of external device.

Background technology

Science and technology develop rapidly current, computing machine has spreaded all over huge numbers of families, except family, places of business such as office, enterprise, school, Internet bar, hotel all have been equipped with computing machine.Work and while easily in life are being provided for people, because the publicity of these places of business, computer equipment particularly external device (as LCD, the first-class valuable accessory of shooting) becomes assistant's target of burglar easily, the stolen incident of place of business computing machine external devices such as Internet bar, hotel, school, enterprises and institutions is nothing to be surprised at, relevant unit suffers heavy losses, and the place of business computer anti-theft especially antitheft problem of external device becomes increasingly conspicuous; Singly not the computing machine external device, be easy to become burglar's target as valuable external devices such as LCD TV, projector, outdoor machine of air-conditioner, switch cubicles yet.

It is of inadequate achievement that people solve the antitheft measure of external device at present, and most of external devices are not equipped with anti-theft device, the precautionary measures that have or with high costs, or easy crack.Common measure is as follows: one, external device under lock and key with mechanical means, as with iron chains equipment, add mechanical lock, but mechanical lock is easy to be opened, factor of assurance is low.The fearness that also has is by thief's picking lock, and the iron chains weldering is extremely fixed, though can not allow equipment be embraced, ownly safeguards or during mobile device, will go to war unavoidably, wastes time and energy, very bother, and and effect little; Two, sub electric anti-theft wire is set on external device, electronic anti-theft line one end on external, other end device taking alarm, when the electronic anti-theft line is cut off, the warning device of the other end sends alerting signal, be whether the principle checkout equipment that whether opens circuit according to electric wire is external stolen, this technical measures are installed the trouble complexity, and influence external attractive in appearancely, more crucial is that these common electronic anti-theft lines do not have the Short Circuit withstand warning function, as short circuit that the output line of device end taking alarm is gone ahead of the rest, then cut off the line of external end again, the alerting signal processor will detect less than antitheft electric wire chopping signal, just can not report to the police, and does not play antitheft effect.

Along with the continuous development of society, the quantity of the valuable equipment of external device and so on day increase severely, market in urgent need is a kind of have damage resistance, can effectively antitheft anti-theft product.The utility model promptly addresses that need and develops.

Utility model content the purpose of this utility model provide a kind of have anti-open circuit, the burglar alarm of the external device of short circuit and anti-physical damage function.

The purpose of this utility model is to be achieved through the following technical solutions like this: burglar alarm comprises peripheral hardware detector, signal transmssion line and alerting signal processor, the output port of peripheral hardware detector is connected by signal transmssion line with the input port of alerting signal processor, the alerting signal processor is provided with outboard signal detection module, signal processor and audible alarm unit, the peripheral hardware detector is provided with electronic switch, wherein is provided with signal generating module and electronic switch serial or parallel connection in the peripheral hardware detector.

Above-mentioned signal generating module is electric current, voltage difference generation module or cycle signal generator.

Embedding electronic isolation material in the above-mentioned peripheral hardware detector, electronic isolation material such as epoxy resin embedding adhesive.

Above-mentioned alerting signal processor also is provided with wired or wireless alarm signal output ends mouth.

The utility model adopts above structure; the peripheral hardware detector is installed on the external device; when the peripheral hardware detector is removed; or signal transmssion line is opened circuit, short circuit; or the peripheral hardware detector be disassembled, destroyed, or when detecting external device and breaking away from the peripheral hardware detector, all can change the output signal of peripheral hardware detector; trigger the alerting signal processor and report to the police, realize perfect anti-destruction defencive function.

Peripheral hardware detector of the present utility model inspection has following advantage: 1, anti-dismounting, volume are small and exquisite, simple installation and not influence external device attractive in appearance; 2, have and open circuit or short circuit warning function; 3, adopt electronic isolation material embedding peripheral hardware detector to have anti-physical damage warning function; 4, both can on-the-spot audible alarm, also can pass to other alarm receivers to alerting signal by wired or wireless output port.The burglar alarm that can be widely used in place computing machine external devices such as Internet bar, hotel, school, enterprises and institutions.Also can be applied to simultaneously the burglar alarm of external devices such as projector, LCD TV, outdoor machine of air-conditioner.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is further elaborated:

Fig. 1 is the structural representation of the utility model burglar alarm;

Fig. 2 is a kind of circuit theory diagrams of cycle signal generator in the utility model peripheral hardware detector.

Embodiment

See also shown in Figure 1, the utility model comprises peripheral hardware detector 1, signal transmssion line 3 and alerting signal processor 2, the output port 11 of peripheral hardware detector 1 is connected by signal transmssion line 3 with the input port 21 of alerting signal processor 2, alerting signal processor 2 is provided with signal detection module 22, signal processor 23, audible alarm unit 24, shell 25 and circuit board 26, can also be provided with wired or wireless alarm signal output ends mouth 27, be connected with other alarm receivers.

Above-mentioned peripheral hardware detector 1 is provided with shell 12, circuit board 13, electronic switch 14 and signal generating module 15, and shell 12 is provided with fixed orifice 121.Electronic switch 14 can adopt electronics elastic sheet switch, electronic microswitch, optoelectronic switch etc.Signal generating module 15 can adopt electric current, voltage difference generation module or cycle signal generator, with electronic switch 14 serial or parallel connections.Embedding electronic isolation material 16 on the circuit board 13 of peripheral hardware detector 1, electronic isolation material 16 play anti-physical damage effect as epoxy resin embedding adhesive.

Electronic switch 14 on the peripheral hardware detector 1 is after being fixed on the external device surface with the double faced adhesive tape stickup or with screw, electric state is in conducting or off-state, after peripheral hardware detector 1 is removed, electronic switch 14 flicks, electric state overturns, signal generating module 15 output signals are changed, the signal detection module 22 of alerting signal processor 2 detects improper signal, transitional information is given signal processor 23, signal processor 23 control audible alarm units 24 send alarm sound, perhaps give wired or wireless alarm signal output ends mouth 27, carry out remote alarms alerting signal.

Signal generating module 15 on the peripheral hardware detector 1 is electric current, voltage difference generation module, adopt circuit such as electric resistance partial pressure, diode (containing voltage stabilizing diode) voltage stabilizing or other impedance networks to produce voltage or electric current difference, when signal transmssion line is opened circuit, short circuit or peripheral hardware detector are disassembled, when destroyed, change by the electric current of signal generating module 15 or the voltage difference of signal generating module 15 input ends and output terminal, improper signal sends alerting signal processor 2 to, triggers and reports to the police.

Signal generating module 15 on the peripheral hardware detector 1 adopts cycle signal generator, when signal transmssion line 3 is opened circuit, short circuit or peripheral hardware detector are disassembled, when destroyed, periodic signal can't be transmitted, the signal detection module 22 of alerting signal processor 2 detects less than periodic signal, triggers and reports to the police.

See also shown in Figure 2ly again, this is that the signal generating module 15 of the utility model peripheral hardware detector 1 adopts cycle handshake processing module circuit theory diagrams.This circuit is made up of single-chip microcomputer U1, triode Q1, resistance R 1, resistance R 2, triode Q2, resistance R 3, resistance R 4, connector J1.Power supply VCC gives single-chip microcomputer U1 power supply.The data that 6. the data transmission pin of single-chip microcomputer U1 is formed by triode Q1 and resistance R 1, R2 transmit buffer circuit and outwards transmit data, resistance R 1 is the base resistance of triode Q1, resistance R 2 is the collector pull-up resistor of triode Q1, when 6. the data transmission pin of single-chip microcomputer U1 is low level, triode Q1 conducting, triode Q1 collector potential drags down, the output low level signal; When 6. single-chip microcomputer U1 data transmission pin was high level, triode Q1 ended, and triode Q1 collector potential is high level by drawing on the resistance R 2, and the output high level signal realizes that thus single-chip microcomputer U1 outwards exports the cycle handshake by buffer circuit.5. the Data Receiving pin of single-chip microcomputer U1 receives data from the outside by the Data Receiving buffer circuit that triode Q2, resistance R 3, resistance R 4 are formed, triode Q2 emitter-base bandgap grading is as the input pin of external signal, when triode Q2 emitter-base bandgap grading input signal is low level, triode Q2 conducting, triode Q2 collector potential drags down, and the input low level signal to the Data Receiving pin of single-chip microcomputer U1 5.; When triode Q2 emitter-base bandgap grading input signal is high level, triode Q2 ends, the collector potential of triode Q2 is high level by drawing on the pull-up resistor R3, to the Data Receiving pin of single-chip microcomputer U1 5. the input high level signal realizes that thus single-chip microcomputer U1 receives the external cycles handshake by buffer circuit.Because by triode Q1, triode Q2 is the main data isolation circuit transceive data of forming; when signal transmssion line 3 opens circuit or during short circuit; because the existence of buffer circuit; avoided infringement, improved circuit protection single-chip data transmitting-receiving pin, and the cycle handshake of blocking-up single-chip microcomputer U1; triggering alerting signal processor 2 reports to the police; can not cause damage to single-chip microcomputer U1 circuit, after signal transmssion line 3 fault recoveries, circuit promptly recovers operate as normal.

Claims

1. the burglar alarm of an external device, comprise peripheral hardware detector, signal transmssion line and alerting signal processor, the output port of peripheral hardware detector is connected by signal transmssion line with the input port of alerting signal processor, the alerting signal processor is provided with outboard signal detection module, signal processor and audible alarm unit, the peripheral hardware detector is provided with electronic switch, it is characterized in that: be provided with signal generating module and electronic switch serial or parallel connection in the peripheral hardware detector.

2. the burglar alarm of a kind of external device according to claim 1, it is characterized in that: its signal generating module is electric current, voltage difference generation module or cycle signal generator.

3. the burglar alarm of a kind of external device according to claim 2, it is characterized in that: its cycle signal generator is a cycle handshake processing module.

4. the burglar alarm of a kind of external device according to claim 1, it is characterized in that: its electronic switch is electronics elastic sheet switch, electronic microswitch, optoelectronic switch or relay switch.

5. the burglar alarm of a kind of external device according to claim 1 is characterized in that: embedding electronic isolation material in its peripheral hardware detector, electronic isolation material such as epoxy resin embedding adhesive.

6. the burglar alarm of a kind of external device according to claim 1, it is characterized in that: above-mentioned alerting signal processor also is provided with wired or wireless alarm signal output ends mouth.