CN2498675Y - Security monitor with alarm for commodities and books - Google Patents

Disclosed is a theftproof alarm monitor device used for commodities and books, which comprises a machine body and electronic components in the machine body which form an electronic circuit to be a transmitting and receiving channel. In the monitoring channel, when commodities or books with special labels pass through, a detector in the channel will receive the signals from the labels and generate sound-light alarm after the processing of the monitor. The utility model, which has the advantages of reasonable design, high integrity, high sensitivity, stable and reliable performance, small size and light weight, is suitable for people to read and borrow books in the large, medium and small size libraries, and is also used for the supermarkets where commodities being attached special labels in the theftproof monitor locations.

Commodity, book burglarproof alarming monitor device

One, technical field

The utility model belongs to commodity, book burglarproof alarming monitor device field, relates to the safeguard protection of a kind of commodity books.

Two, background technology

Along with science and technology development, the management of commodity, books is modernization day by day.3M books security system has been reported in June, 78 Taiwan " new knowledge wall bulletin ", but this system architecture complexity, costs an arm and a leg.The book monitoring system of domestic production has JX train type product, its shortcoming is a job insecurity, easily report by mistake, there is the dead band often to fail to report phenomenon, though be improved, power consumption is bigger for Chinese patent 92220020.3,94229581.1 " book burglarproof alarming monitor device ", also some is not so good as people's will for poor stability, antijamming capability and sensitivity aspect.

Three, summary of the invention

The purpose of this utility model is to provide a kind of commodity, book burglarproof alarming monitor device at the deficiencies in the prior art, the electronic circuit that it is made up of electromagnetic component constitutes and transmits and receives device, in monitoring channel, when the books that have special label or commodity pass through, detector in the passage can measure the signal that label sends, thereby produces sound and light alarm.

The purpose of this utility model is realized by following technical measures:

Commodity, book burglarproof alarming monitor device contain organism (1) and are loaded on the reception of electronic circuit formation, the emitter passage that the electromagnetic component in the body is formed, by power transformer (2) is housed in body (1) and the body, the printed circuit board (PCB) (3) of signal input, wave filter, preposition amplification, voltage amplifier, wave shaping, electronic signal frequency-selecting function, circuit board (4) have signal power amplification, shaping feature; Front panel is equipped with display gauge head (5), power switch (6), power light (7), extraneous interference signal lamp (8), change-over switch (sensitivity of work/accent) (9), transfers the potentiometer (10) of sensitivity, rear panel is equipped with supply socket (11), signal accessory power outlet (12), signal input socket (13), and the outer front and back panels circuit of the electromagnetic component in the machine, printed circuit board (PCB) and machine connects and leaves air vent on the base plate of formation electronic circuit integral body, body and the side panel or window shutter dispels the heat.

The receiving trap that electronic circuit is made of LB, when special label can receive electronic signal during by monitoring channel, this signal enters by R ₁, R ₂, C ₁, IC ₁Selective frequency amplifier circuit is through C ₂HK is given in coupling ₁The electronics bandwidth-limited circuit, through C ₃Input R ₄, R ₅, C ₄, IC ₂After constituting the frequency-selecting processing and amplifying, through C ₅Enter HK ₂The electronics frequency selection circuit carries out filtering, amplifies back input R ₈, VR ₁, R ₆, R ₇, LED ₁, IC ₃, IC ₄, R ₁₀The comparator circuit that constitutes is if the extraneous interference signal enters this electronic circuit, LED by LB ₁(redness) electroluminescent lamp can be bright, and make IC ₉After T ₁The triode saturation conduction is through HK ₂Signal after the processing passes through R ₉Be divided into two-way: the one tunnel through C ₇Pass through R ₁₂, R ₁₃, R ₁₄, IC ₅After carrying out voltage amplification, enter HK ₃The electronics frequency selection circuit, through C ₈Input R ₁₅, R ₁₆, R ₁₇, C ₁₁, IC ₇, D ₁Precise rectification circuit handle, if desired signal just outputs to IC ₁₁, otherwise no signal output is through R ₉Another road signal pass through IC ₆Impedance inverter circuit, through R ₁₁Input HK ₄The electronics frequency selection circuit that constitutes, signal outputs to C after treatment ₉, R ₁₈, R ₁₉, R ₂₀, D ₂, IC ₈The precise rectification circuit that constitutes outputs to IC after handling ₁₁, at IC ₁₁Be that the two paths of signals input is arranged, meet some requirements down IC ₁₁There is signal to output to R ₂₁, C ₁₄, IC ₁₀The ac oscillator circuit that constitutes allows its starting of oscillation, if at IC ₁₁Two input signals do not satisfy condition IC ₁₁No signal output, not starting of oscillation of oscillatory circuit; After the oscillatory circuit starting of oscillation, allow T ₂The triode saturation conduction---by hocketing, allow LED ₂～LDE ₅Send the chimes of doom light signal with loudspeaker Q, eliminate the chimes of doom light signal behind the certain hour of gap automatically.By JZ and IC ₁₂The sine-wave generator that constitutes produces a frequency stabilization, the minimum sine wave of degree of distortion, is input to IC ₁₃, the different signal of output loop prevents the interference of extraneous interference signal to this monitor as reference signal respectively after signal Processing, another road is through R ₂₁, C ₁₂, R ₂₂, IC ₁₄The selective frequency amplifier circuit that constitutes is after signal Processing, through HK ₅Electronics frequency selection circuit, MK power amplification, supply with radiating circuit LA, C ₁₃Above circuit has constituted the electronic circuit of this monitor.

The utlity model has following advantage:

1. whole electronic circuit is concentrated in the body, stability, reliability and the sensitivity of complete machine have been improved, and volume is little and in light weight, is suitable for large, medium and small library and opens access and check out, and also is suitable for the antitheft monitoring occasion of commodity market of adhering to special tag.

2. use crystal JZ, IC ₁₂Substitute fork generator, thereby improved sinusoidal wave frequency stability, and degree of distortion is less, has simple, reliable, the stable characteristics of circuit.

3. make debugging and convenient transportation, cost is low, effective, applies in China, and remarkable economic efficiency and social benefit are arranged.

Four, description of drawings

Fig. 1 is commodity book burglarproof alarming monitor apparatus structure (an overlooking) synoptic diagram;

Fig. 2 is the front-panel structure synoptic diagram;

Fig. 3 is the rear panel structure synoptic diagram;

Fig. 4 is the monitor circuit block diagram;

Fig. 5 is a kind of electrical schematic diagram of Fig. 4.

Five, embodiment

Embodiment:

Below by embodiment the utility model is specifically described; be necessary to be pointed out that at this present embodiment can only be used for the utility model is further specified; can not be interpreted as the restriction to the utility model protection domain, those skilled in the art can make some nonessential improvement and adjustment to the utility model according to foregoing.

The receiving trap that electronic circuit is made of LB, when special label can receive electronic signal during by monitoring channel, this signal enters by R ₁, R ₂, C ₁, IC ₁The selective frequency amplifier circuit that constitutes carries out signal amplification, frequency-selecting, again through C ₂HK is given in coupling ₁The electronics bandwidth-limited circuit carry out frequency-selecting again, the signal after the amplification is through C ₃Input R ₄, R ₅, C ₄, IC ₂The selective frequency amplifier circuit that constitutes is handled desired signal, again through C ₅Enter HK ₂The electronics frequency selection circuit that constitutes carries out filtering, amplifies the back input by R ₈, VR ₁, R ₆, R ₇, LED ₁, IC ₃, IC ₄, R ₁₀The comparator circuit that constitutes is if the extraneous interference signal enters this electronic circuit system, LED by LB ₁(redness) electroluminescent lamp can be bright, and make IC ₉After T ₁The triode saturation conduction with the extraneous interference signal shorts, makes this monitor can not produce false alarm.Through HK ₂Signal after the processing passes through R ₉Be divided into two-way: the one tunnel through C ₇Pass through R ₁₂, R ₁₃, R ₁₄, IC ₅After carrying out voltage amplification, enter HK ₃The electronics frequency selection circuit that constitutes carries out signal Processing, and the signal after the processing is again through C ₈Input is by R ₁₅, R ₁₆, R ₁₇, C ₁₁, IC ₇, D ₁The precise rectification circuit that constitutes carries out signal Processing, if desired signal just has signal to output to IC ₁₁, otherwise, no signal output; Through R ₉Another road signal pass through IC ₆The impedance inverter circuit that constitutes is after R ₁₁Input HK ₄The electronics frequency selection circuit that constitutes, signal outputs to after treatment by C ₉, R ₁₈, R ₁₉, R ₂₀, D ₂, IC ₈The precise rectification circuit that constitutes carries out signal Processing and outputs to IC again ₁₁At IC ₁₁Be that the two paths of signals input is arranged, meet some requirements down IC ₁₁There is signal to output to by R ₂₁, C ₁₄, IC ₁₀The ac oscillator circuit that constitutes allows its starting of oscillation, if at IC ₁₁Two input signals do not satisfy condition IC ₁₁No signal output, not starting of oscillation of oscillatory circuit after the oscillatory circuit starting of oscillation, allows T ₂The triode saturation conduction---by hocketing, allow LED ₂～LDE ₅Send the chimes of doom light signal with loudspeaker Q, eliminate the chimes of doom light signal behind the certain hour of gap automatically.By JZ and IC ₁₂Constitute sine-wave generator, produce a frequency stabilization, the minimum sine wave of degree of distortion, be input to IC ₁₃, the different signal of output loop prevents the interference of extraneous interference signal to this monitor as reference signal respectively after signal Processing, prevents false alarm, wherein another road is through R ₂₁, C ₁₂, R ₂₂, IC ₁₄The selective frequency amplifier circuit that constitutes carries out signal Processing again, and the signal after the processing is through HK ₅Electronics frequency selection circuit, MK power amplification, promote circuit and carry out frequency-selecting, power amplification, supply with radiating circuit LA, C ₁₃More than connect the electronic circuit that circuit has constituted this monitor.