CN2166491Y

CN2166491Y - Anti-theft alarm with prealarming process

Info

Publication number: CN2166491Y
Application number: CN 93233878
Authority: CN
Inventors: 黄宗匀
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-04
Filing date: 1993-05-04
Publication date: 1994-05-25
Anticipated expiration: 2003-05-04

Abstract

The utility model relates to an anti-theft alarm with the prealarming process, which is composed of an oscillating circuit, a switching circuit, and a sound and light alarm device. The utility model is characterized in that the anti-theft alarm with the prealarming process is provided with a time delay device and a prealarming signal lamp. When the person's body approaches to induction terminals, the amplitude or the frequency of the oscillating circuit occurs change, leading to the switching circuit operating, the prealarming signal lamp is brightened, and simultaneously, a time delay circuit works, after delaying a period of time, the sound and light alarm device sends out thief alarming signals. The utility model can prevent false alarm, has the advantages of novel and simple structure, and low cost, and is suitable for the production in the medium sized and the miniature sized manufacturers.

Description

Anti-theft alarm with prealarming process

The utility model relates to a kind of burglar alarm, particularly a kind of burglar alarm with the early warning process.

Known burglar alarm is made up of oscillatory circuit and on-off circuit, and an input end and an output terminal are arranged.Input end connects the induction terminal, and output terminal connects acoustic-optic alarm.When burglar alarm was worked, oscillatory circuit opened and shakes under normal conditions, the on-off circuit no-output; When human body near the induction end period of the day from 11 p.m. to 1 a.m, thereby the electric capacity that has changed oscillatory circuit has changed the amplitude or the frequency of oscillatory circuit, causes the on-off circuit action, output terminal output electric signal starts acoustic-optic alarm, sends the theft alarm signal.

The shortcoming of this burglar alarm is not have the early warning process, can send the theft alarm signal equally when owner is close, causes false alarm easily.

Task of the present utility model provides a kind of burglar alarm with the early warning process; When human body at first sends early warning signal near the induction end period of the day from 11 p.m. to 1 a.m, behind one section pre-warning time, still then send the theft alarm signal near the induction terminal as human body, in pre-warning time, leave the induction terminal and then do not send the theft alarm signal as human body.Like this, in pre-warning time, owner can take the method for being scheduled to prevent the generation of theft alarm signal; And robber or drawn back with fear by early warning signal, or triggering acoustic-optic alarm sends the theft alarm signal, and this is an advantage of the present utility model.

Task of the present utility model realizes with following mode: insert an early warning signal lamp and a time-delay mechanism at the output terminal of original burglar alarm, and with original sound and light alarm apparatus reconfiguration to the output terminal of time-delay mechanism.Like this, on-off circuit output electric signal makes that the early warning signal lamp is shinny to start time-delay mechanism work simultaneously when the induction terminal of burglar alarm induces the close signal of human body, after time-delay after a while, time-delay mechanism action output electric signal makes acoustic-optic alarm send the theft alarm signal.In time, if human body leaves the induction terminal, then the output terminal no signal of on-off circuit is exported in time-delay (early warning), and the time-delay mechanism interruption of work can not trigger acoustic-optic alarm.Circuit recovers former duty.

The utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is the utility model block diagram;

Fig. 2 is the electrical schematic diagram of the utility model non-limiting examples.

As shown in Figure 1: ［ 1 ］ is input end; ［ 2 ］ be oscillatory circuit; ［ 3 ］ be on-off circuit; ［ 4 ］ be time-delay mechanism; ［ 5 ］ be output terminal; ［ 6 ］ be acoustic-optic alarm; ［ 7 ］ be the early warning signal lamp; ［ 8 ］ be the output terminal of on-off circuit ［ 3 ］; ［ 9 ］ be the input end of time-delay mechanism ［ 4 ］.

Referring to Fig. 1, burglar alarm of the present utility model is by oscillatory circuit ［ 2 ］, and on-off circuit ［ 3 ］ and acoustic-optic alarm ［ 6 ］ are formed; An input end ［ 1 ］ and an output terminal ［ 8 ］ are arranged; It is characterized in that: a time-delay mechanism ［ 4 ］ and an early warning signal lamp ［ 7 ］ are arranged; This time-delay mechanism ［ 4 ］ has an input end ［ 9 ］ and an output terminal ［ 5 ］; The input end ［ 9 ］ of time-delay mechanism ［ 4 ］ is connected with output terminal ［ 8 ］; The output terminal ［ 5 ］ of time-delay mechanism ［ 4 ］ is connected with acoustic-optic alarm ［ 6 ］.Early warning signal ［ 7 ］ is connected with output terminal ［ 8 ］.

Like this, when circuit working, oscillatory circuit ［ 2 ］ opens and shakes, and makes on-off circuit ［ 3 ］ be in "off" state, and the later circuit of its output terminal ［ 8 ］ all is in waiting status.

When input end ［ 1 ］ induces human body near signal, changed the amplitude or the frequency of oscillatory circuit ［ 2 ］, make on-off circuit ［ 3 ］ be in the state of " leading to "; Early warning signal lamp ［ 7 ］ is shinny, and time-delay mechanism ［ 4 ］ is started working, through behind one section pre-warning time as human body still near input end ［ 1 ］ then time-delay mechanism ［ 4 ］ output electric signal make acoustic-optic alarm ［ 6 ］ action send the theft alarm signal.In pre-warning time, leave then oscillatory circuit ［ 2 ］ recovery vibration of input end ［ 1 ］ as human body, on-off circuit ［ 3 ］ is in " pass " state again, cuts off output signal and makes time-delay mechanism ［ 4 ］ interrupt delay working, replys waiting status.

Referring to Fig. 2, X is that input end ［ 1 ］: BG1 and peripheral cell thereof are formed oscillatory circuit ［ 2 ］; BG2 and peripheral cell thereof are formed on-off circuit ［ 3 ］; IC and peripheral cell are formed time-delay mechanism ［ 4 ］; WJ and SD3 form acoustic-optic alarm ［ 6 ］; The normally closed interlock JF1-1 of relay J F1 and JF1-2 are output terminal ［ 8 ］, and JF1-1 is also simultaneously as the input end ［ 9 ］ of time-delay mechanism ［ 4 ］; The normally open contact JF2-1 of circuit breaker JF2 is the output terminal ［ 5 ］ of time-delay mechanism ［ 4 ］; The IC of present embodiment adopts " 555 " type time-base integrated circuit.A is a reometer, is mainly used in to adjust and observation.

As shown in Figure 2: the device ［ 4 ］ that prolongs of the present utility model is by " 555 " time-base integrated circuit piece and locate to enclose element electrochemical capacitor C6, C7 relay J F2 and resistance R 6 is formed, wherein 8 pin of " 555 " integrated package are connected the input end as delay circuit ［ 4 ］ with 4 pin, succeed an end and the electrochemical capacitor C6 of electrical equipment JF2 normally open contact simultaneously, the anode of C7; 6 pin connect 2 pin and connect negative terminal and the negative terminal of resistance R 6 and the end of resistance R 6 of electrochemical capacitor C6, and 3 pin are succeeded an end of electrical equipment JF2 coil; The other end of the negative terminal of 1 pin and capacitor C 7 and relay J F2 coil and the other end of resistance R 6 are made electrical grounding.The normally open contact JF2-1 of relay J F2 connects sound and light alarm apparatus and power supply as the output terminal of time-delay mechanism ［ 4 ］.By the time-delay mechanism ［ 4 ］ that " 555 " integrated circuit and peripheral cell thereof are formed, its principle of work is not describing at this of knowing of general electrical technology personnel.

C6 is generally 1-3 μ F, and C7 is usually greater than 200 μ F, and R6 is 1-2M.

Alarm of the present utility model novelty simple in structure, cost is low modest, is suitable for general middle-size and small-size electronics manufacturer production.

Claims

1, a kind of burglar alarm with the early warning process is made up of oscillatory circuit [2], on-off circuit [3] and acoustic-optic alarm [6]; An input end [1] and an output terminal [8] are arranged; It is characterized in that: a time-delay mechanism [4] and an early warning signal lamp [7] are arranged; This time-delay mechanism [4] has an input end [9] and an output terminal [5]; Input end [9] is connected with output terminal [8]; Output terminal [5] is connected with acoustic-optic alarm [6]; Output terminal [8] is connected with the early warning signal lamp.

2, the burglar alarm of band early warning process according to claim 1 is characterized in that, time-delay mechanism ［ 4 ］ is made up of " 555 " time-base integrated circuit and peripheral cell electrochemical capacitor ［ C6 ］, ［ C7 ］ relay ［ JF2 ］ and resistance ［ R6 ］; 8 pin of " 555 " integrated package connect the anode that 4 pin are succeeded an end of electrical equipment ［ JF2 ］ normally open contact ［ JF2-1 ］ and electrochemical capacitor ［ C6 ］, ［ C7 ］ simultaneously; 6 pin connect 2 pin and connect the negative terminal of electrochemical capacitor ［ C6 ］ and an end of resistance ［ R6 ］, and 3 pin are succeeded an end of electrical equipment ［ JF2 ］ coil; One end of the negative terminal of 2 pin and electrochemical capacitor ［ C7 ］ and relay ［ JF2 ］ coil; The other end of the negative terminal of 2 pin and electrochemical capacitor ［ C7 ］ and relay ［ JF2 ］ coil and the other end of resistance ［ R6 ］ are made electrical grounding.