CN2147598Y - Long-distance wire monitoring and controlling theft-proof alarm - Google Patents

Abstract

The utility model provides a long-distance wire theft-proof alarm, comprising a magnetic control switch and a detection control return circuit. The magnetic control switch is formed by matching of magnet and dry reed pipes; the detection control return circuit is composed of the corresponding electrical apparatus elements, such as four NAND gate integrated circuits, a loudspeaker, etc. according to working principle of the electrical apparatus elements. The utility model is characterized in that a filtering capacitance C1 is connected in parallel with the circuit of dry reed pipes connected in series with a balancing resistor; the dry reed pipes is the matching piece of the magnetic control switch; the filtering capacitance C1 can eliminate the interference of the alternating current to realize the long-distance monitoring. A capacitance C2 which can realize the break-wire time delay is connected with the output end of an NAND gate (3) and the input end of an NAND gate (2) of the four NAND gates. A button is connected in parallel between two roots of alarm wires of the detection control return circuit, and the button is accompanied with the use of a doorbell.

Description

Long-distance wire monitoring and controlling theft-proof alarm

Remote wired monitoring burglar alarm belongs to electric equipment products.

Existing alarm kind is more, for example microwave monitoring anti-theft device, infrared monitor control alarm, laser burglar alarm, wireless remote control burglar alarm or the like and with four Sheffer stroke gates as the burglar alarm of core all in various degree exist that cost height, technical conditions complexity, power consumption are big, monitoring is apart from deficiency such as limited, is difficult to popularization and application.

The objective of the invention is to solve a kind of economic and practical alarm of using away from the outdoor storehouse of unit, individuality and family of monitoring.

Design concept of the present invention: by magnet and the supporting magnetic switch of forming of tongue tube, four Sheffer stroke gates, corresponding electric elements such as loudspeaker are formed by its principle of work and are detected control loop, thereby determine that according to the size that the variation of disconnection, short circuit and the normal condition of control loop changes loop resitance the duty of four Sheffer stroke gates realizes reporting to the police.On the circuit of tongue tube serial connection balance resistance and connect one and can eliminate and exchange the filter capacitor that disturbs, realized remote monitor.According to capacitor charging/discharging principle one of them output terminal in four Sheffer stroke gates, another input end connects a condenser network and realizes the break alarm time-delay.Each Sheffer stroke gate upset level among the four Sheffer stroke gate CD4011 is all at the 1/2EC(supply voltage) about.A point current potential is higher than 1/2EC when static, Sheffer stroke gate (3) output electronegative potential, and Sheffer stroke gate (1) (2) output noble potential, diode V2, V3 end; B point current potential is lower than 1/2EC simultaneously, Sheffer stroke gate (4) output noble potential, and therefore the equal no signal input of 4,5 pin of eight sheet KD9562 is not worked, and loudspeaker does not have sound and does not report to the police; When the generation of theft situation pulled apart or make tongue tube to separate with magnet alarming line, control loop disconnected, a point current potential step-down, Sheffer stroke gate (3) output noble potential, (1) output electronegative potential, V2 conducting, 4 pin of KD9562 have input, and loudspeaker sends the alarm sound of police car formula.For preventing that cutoff circuit time of fire alarming weak point from can not arouse indoor occupant vigilance, taked warning time-delay measure.When the instantaneous open circuit of alarming line, the instantaneous output noble potential of Sheffer stroke gate (3) electronegative potential appears, in a moment of naming a person for a particular job, C2 passes through V1, R5 charges rapidly, and when Sheffer stroke gate (3) output recovered electronegative potential, C2 passed through R5, R4 slowly discharges, make Sheffer stroke gate (2) be input as noble potential, be output as electronegative potential, the V3 conducting, till KD9562 work, loudspeaker continue sound continuity 5-10 and are lower than 1/2EC to the C2 both end voltage second; If the alarming line short circuit is committed theft in attempt also can report to the police, because during line short circuit, b point connects noble potential, and Sheffer stroke gate (4) input noble potential is exported electronegative potential, and 5 pin of KD9562 have input signal just to work, and loudspeaker sends the happy doorbell acoustic alarm of double-tone.Around this principle control loop and connect a bell button then this alarm can doublely make doorbell and use.

The good effect that the present invention produces: alarming line can be prolonged several kilometers far away and realize remote monitor; Power consumption is little, 3 volts of supply voltages, static power consumption 25 μ A; Price is low, easy to usely can doublely make doorbell again.

Description of drawings:

Fig. 1: general structure synoptic diagram

Fig. 2: electrical schematic diagram

Embodiment: tongue tube 4 and magnet 5 in the magnetic switch are purchased approved product, tongue tube 4 be encapsulated in the plastic casing after balance resistance 6 is connected in series.Four Sheffer stroke gates 7 adopt import integrated circuit CD4011 and power supply, loudspeaker 9, filter capacitor C1, charge and discharge capacitance C2, eight sheets 8 of alarm sound device and corresponding electric elements, after pressing the electrical schematic diagram welding, use in the lump with printed circuit board (PCB) in the plastic casing 1 of screw stuck-at-0cm * 7.5cm * 2.6cm.Balance resistance R1 is 33K Ω, and alarming line 11 is selected light-duty insulate line for use; Every kilometer 200 Europe of two lead resistances, extensible eight kilometers far away of alarming line.The distance that alarming line is drawn is relevant with the resistance of alarming line line with balance resistance.Alarming line is welded on the plug 3 of Φ 2.5mm, is inserted into during use in Φ 2.5 sockets 2 that are fixed in the housing, has formed the detection control loop.If with the double doorbell of doing of alarm with bell button 10 being attempted by between two alarming lines.

Claims (1)

1. Remote wired burglar alarm is by magnet and the supporting magnetic switch of forming of tongue tube with four Sheffer stroke gate integrated circuit, the detection control loop that corresponding electric elements such as loudspeaker are formed by its principle of work is formed, it is characterized in that: on the circuit of the auxiliary equipment tongue tube of magnetic switch serial connection balance resistance and connect one and can eliminate to exchange and disturb the filter capacitor C1 that realizes remote monitor, the output terminal of (3) in four Sheffer stroke gates, (2) input end connects capacitor C 2 circuit that can realize the break alarm time-delay, between two alarming lines of control loop and connect one and can doublely make the button that doorbell is used.

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