CN202816070U

CN202816070U - Simple antitheft monitoring circuit

Info

Publication number: CN202816070U
Application number: CN 201220434110
Authority: CN
Inventors: 吴桂林
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-29
Filing date: 2012-08-29
Publication date: 2013-03-20
Anticipated expiration: 2022-08-29

Abstract

The utility model relates to a simple antitheft monitoring circuit, comprising a vibration sensing circuit, a trigger circuit, a switch circuit and a wireless radio frequency emission circuit. The output signal of the vibration sensing is transmitted to the trigger circuit; the output signal of the trigger circuit is sent to the wireless radio frequency emission circuit through the switch circuit; when a thief opens the monitored object, a vibration sensor acquires a signal, a trigger signal is emitted by the trigger circuit, a wireless radio frequency emission module is promoted to send an alarm signal to a host, and wireless alarm is achieved; and the simple antitheft monitoring circuit is advantageous in that the structure is simple, networking is simple, etc.

Description

A kind of Simple theftproof observation circuit

Technical field

The utility model relates to a kind of observation circuit, particularly be a kind of Simple theftproof observation circuit.

Background technology

Traditional guard against theft and alarm system more complicated, cost height are difficult to promote on a large scale.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of Simple theftproof observation circuit is provided.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of Simple theftproof observation circuit, involving vibrations sensing circuit, trigger circuit, on-off circuit and less radio-frequency radiating circuit, the output signal of described vibrating sensing circuit transfers to trigger circuit, and the output signal of described trigger circuit is sent to the less radio-frequency radiating circuit through on-off circuit control.

Preferably, described vibrating sensing circuit around the city spring, then suspends a zinc-plated copper ball in midair by fine copper wire by thin tinned wird, is hung in the center of spring, the outer ring spacing of copper ball and spring is 0.8-1mm, and copper ball is suspended on the support more than the 1.5m as vibration transducer T.

Preferably, described trigger circuit are made of resistance R 3, the capacitor C 1 of 555 time base circuit IC1 and connection thereof.

Preferably, described less radio-frequency radiating circuit adopts FDD-5 transmitter module IC2.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: when stealer is opened the object of monitoring, vibration transducer pickoff signals of the present utility model, send trigger pip through trigger circuit, promote wireless transmitter module and send alerting signal to main frame, realize radio alarming, have the advantages such as simple in structure, that networking is simple.

Description of drawings

Fig. 1 is frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, a kind of Simple theftproof observation circuit of the present utility model, involving vibrations sensing circuit 1, trigger circuit 2, on-off circuit 3 and less radio-frequency radiating circuit 4, the output signal of described vibrating sensing circuit 1 transfers to trigger circuit 2, and the output signal of described trigger circuit 2 is sent to less radio-frequency radiating circuit 4 through on-off circuit 3 controls.

Described vibrating sensing circuit 1 by thin tinned wird around the city spring, then suspend a zinc-plated copper ball in midair by fine copper wire, be hung in the center of spring, the outer ring spacing of copper ball and spring is 0.8-1mm, copper ball is suspended on the support more than the 1.5m as vibration transducer T, and described trigger circuit 2 are made of resistance R 3, the capacitor C 1 of 555 time base circuit IC1 and connection thereof, under normal circumstances, the copper ball of vibration transducer and spring outer shroud are isolated mutually, and 555 time base circuit IC1 are in reset mode.

Work as stealer, when opening the object of monitoring, vibration transducer T internal copper club and spring outer shroud touch, make spheroid short circuit ground, the 2nd pin of 555 time base circuit IC1 is low level, the 555 time base circuit IC1 upset set that just can be triggered, its the 3rd pin output is high level, and this signal makes transistor VT1 conducting through resistance R 1 current limliting, be input to the 2nd pin of FDD-5 transmitter module IC2, and deliver to the 3rd pin of FDD-5 transmitter module IC2, namely modulation signal input end CP modulates the high-frequency signal of emission, the antenna that FDD-5 transmitter module IC2 output terminal connects is namely externally launched modulated frequency electromagnetic waves, sends warning message to Receiving Host.Realize radio alarming, have the advantages such as simple in structure, that networking is simple.

Above-described only is a preferred embodiment of the present utility model, can not limit the scope that the utility model is implemented, and every equalization of doing according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. Simple theftproof observation circuit, it is characterized in that: involving vibrations sensing circuit (1), trigger circuit (2), on-off circuit (3) and less radio-frequency radiating circuit (4), the output signal of described vibrating sensing circuit (1) transfers to trigger circuit (2), and the output signal of described trigger circuit (2) is sent to less radio-frequency radiating circuit (4) through on-off circuit (3) control.

2. Simple theftproof observation circuit according to claim 1, it is characterized in that: described vibrating sensing circuit (1) by thin tinned wird around the city spring, then suspend a zinc-plated copper ball in midair by fine copper wire, be hung in the center of spring, the outer ring spacing of copper ball and spring is 0.8-1mm, and copper ball is suspended on the support more than the 1.5m as vibration transducer T.

3. Simple theftproof observation circuit according to claim 1, it is characterized in that: described trigger circuit (2) are made of resistance R 3, the capacitor C 1 of 555 time base circuit IC1 and connection thereof.

4. Simple theftproof observation circuit according to claim 1 and 2 is characterized in that: described less radio-frequency radiating circuit (4) employing FDD-5 transmitter module IC2.