CN2129437Y - Anti-lose anti-theft alarm for articles carryed with sb. - Google Patents

Abstract

The utility model discloses an anti-lose anti-theft alarm for a carried article, a launcher of the utility model comprises a low frequency oscillation and a high frequency oscillation transmitting circuit (2), and the high frequency oscillation transmitting circuit (2) is provided with a drive circuit (1) and an annular printed antenna. A receiving alarm comprises a super-regenerative detection circuit (3) with an annular printed antenna, an amplifying circuit (4), a frequency selection amplifying circuit (5), an amplitude discrimination circuit (6), a shaping circuit (7), a detecting circuit (8), a monostable circuit (9), an inverting circuit (10), a frequency comparison circuit (11), a delay circuit (12), an electronic switch (13) and a buzzer alarm sound circuit (14). The launcher can be arranged in the protected article when using, and the receiving alarm is carried by users. The utility model needs not external antenna, which has good interference immunity and alarm sound effect and low cost.

Description

Anti-lose anti-theft alarm for articles carryed with sb.

The utility model relates to a kind of burglar alarm, further is meant a kind of anti-burglar alarm that loses of thing of taking that relies on electro ultrafiltration to report to the police.

Prevent institute's case and bag and so on article of taking loss or stolen alarm about travelling or when going out because of thing, wherein rely on electro ultrafiltration to report to the police, patent applied for and publication all having much on academic journals, they generally all adopt the high frequency radio control technology, promptly adopt radio transmission and reception technique, realization is to the warning of taking article, but they exist following weakness and drawback more or less: (1) transmits and receives all needs external antenna, experimental result shows, if antenna length less than 0.5 meter, just is difficult to operate as normal, therefore can not realize the miniaturization of product, be not easy to carry, be difficult to practicality; (2) interference free performance is poor, is subject to the interference of external electric wave and influences its warning reliability.If the lawless person has also bought this class alarm or has carried other interference unit and has been placed at one's side, just can owner's alarm be disturbed, steal article this moment, and owner's alarm can not reported to the police; (3) chimes of doom dullness, and owing to adopting loudspeaker to be difficult to realize the miniaturization of product; (4) circuit unit is expensive and have influence on product cost cost height.

The purpose of this utility model provides a kind of thing of taking that need not external antenna and good in anti-interference performance and prevents losing burglar alarm, makes that simultaneously the alert sound effective value of this alarm is good, low cost of manufacture.

Referring to Fig. 1 the utility model electricity functional-block diagram, solution of the present utility model is as follows.Its circuit part comprises, a transmitter, and it is formed by low-frequency oscillation and driving circuit (1) with by the higher-order of oscillation radiating circuit (2) that has the ring-type printed antenna that it drove; A reception alarm, it is by the super sound detector circuit (3) again that has the ring-type printed antenna, the low frequency signal that will detect from frequency-modulated wave is given amplifying circuit (4) and is amplified, low frequency signal after the amplification is given selective frequency amplifier circuit (5) again and is done the frequency-selecting amplification, the frequency-selecting amplifying signal is given amplitude discrimination comparator circuit (6), divide two-way output by the high useful signal of its selecting range, one the tunnel gives shaping circuit (7), another road is given detecting circuit (8) and is produced an electric potential signal, and it is anti-phase to give negative circuit (10) with this electric potential signal, signal after shaping circuit (7) shaping is divided into two-way, one the tunnel gives the code signal that monostable circuit (9) generates this alarm, another road is given frequency comparison circuit (11) and is sent here to the code signal of frequency comparison circuit (11) with monostable circuit (9) and compare, the rectification current potential of the result that frequency comparison circuit (11) will compare after negative circuit (10) is anti-phase is defeated by delay circuit (12), whether the signal that delay circuit (12) is done after the delay process is given electronic switch (13), reported to the police by electronic switch (13) the control alert acoustic-electric road of hummer (14).

The utility model with foregoing circuit structure places item to be protected with transmitter during fabrication with transmitter and reception alarm separated into two parts during use usually, and the reception alarm leaves in user's pocket or is placed at one's side.Transmitter is outwards launched faintness wave at any time by its ring-type printed antenna.Under normal circumstances, receive alarm and can receive the electric wave that transmitter sends by its ring-type printed antenna, receiving the code signal that rectification current potential and the frequency comparison circuit (11) of negative circuit (10) output of alarm export this moment all is electronegative potential, the output signal of delay circuit (12) makes electronic switch (13) the control alert acoustic-electric road of hummer (14) not report to the police, illustrate that article near the owner, are safe from danger.Removed or steal by the people together with the transmitter in the article and work as item to be protected; or the article owner leaves behind article and when leaving; receive the electric wave that alarm does not receive normal amplitude; a noble potential appears in the code signal of the rectification current potential of negative circuit this moment (10) output and frequency comparison circuit (11) output; show and abnormal conditions occur; so report to the police in electronic switch (13) the control alert acoustic-electric road of hummer (14); notify owner with alert sound; illustrate that article are dangerous, thereby play the effect of protection article.Delay circuit (12) is made delay process to abnormal potential, and purpose is to avoid causing the false alarm phenomenon because of receiving obstacle in short-term.

Taking the anti-warning device that loses burglar alarm of thing with aforementioned all types of dependence electro ultrafiltrations compares, the utlity model has following advantage: (1) transmitter and reception alarm all adopt the ring-type printed antenna, need not external antenna, this is that alarm can reach the important technique measure that the practical stage takes; (2) by adopting a series of interference protection measures such as amplitude discrimination comparator circuit and selective frequency amplifier circuit, make alarm be subjected to the influence of radio station, intercom and other interference electric wave hardly, reach high reliability; (3) every cover alarm all is provided with a fixed frequency, have only when the receiver of an alarm is only received this natural frequency signal, alarm is not just reported to the police, in the signal that receives if contain the signal of other frequency, exist near illustrating and disturb, alarm equipment alarm reminds the user vigilant, the low frequency natural frequency of each alarm can design differently, as having a key made to fit the lock for every lock; (4) adopted warning and delaying circuit, avoided causing the embarrassed look of the obstacle of electric wave reception in short-term false alarm because of factors such as accidental cause or Doppler effect; (5) splendid integrated circuit of alert sound effective value and up-to-date miniature hummer can be adopted in the alert acoustic-electric of hummer road, have both improved tonequality, have guaranteed miniaturization again; (6) taken into full account factors such as market and batch process, accomplished as far as possible and be convenient to produce and debugging that the electronic original part mail-order valency of every cover alarm is no more than ten yuan, to reduce production costs as far as possible.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the utility model electricity functional-block diagram;

Fig. 2 is a kind of physical circuit schematic diagram of transmitter portion of the present utility model;

Fig. 3 is a kind of physical circuit schematic diagram of reception alarm part of the present utility model.

Referring to Fig. 2.Low-frequency oscillation and driving circuit (1) are by hex inverter IC _1ATo IC _1F, resistance R ₁And capacitor C ₁Form.Higher-order of oscillation radiating circuit (2) is by triode BG ₁, resistance R ₂With R ₃, capacitor C ₂To C ₄, diameter is the ring-type printed antenna L of 2.5cm ₁And inductance L ₂Form.

Referring to Fig. 3.Superregenerative detection circuit (3) is by triode BG ₂, resistance R ₄To R ₇, capacitor C ₅To C ₈, diameter is the coil antenna L of 2.5cm ₃And inductance L ₄With L ₅Form.Amplifying circuit (4) is by hex inverter IC _2A, resistance R ₈With R ₉And capacitor C ₉Form.Selective frequency amplifier circuit (5) is by hex inverter IC _2B, resistance R ₁₀To R ₁₂And capacitor C ₁₀To C ₁₂Form, wherein R ₁₀To R ₁₂And C ₁₀To C ₁₂Form the double T rejection filter.Amplitude discrimination comparator circuit (6) is by resistance R ₁₃With R ₁₄Form, in order to suppress noise.Shaping circuit (7) is by hex inverter IC _2DConstitute.Detecting circuit (8) is by hex inverter IC _2C, diode D ₁With D ₂, resistance R ₁₅And capacitor C ₁₃With C ₁₄Form the multiplication of voltage detecting circuit.Monostable circuit (9) is by four XOR gate IC _3AWith IC _3B, resistance R ₁₆To R ₁₈And capacitor C ₁₅With C ₁₇Form.Negative circuit (10) is by hex inverter IC _2EConstitute.Frequency comparison circuit (11) is by four XOR gate IC _3CWith IC _3D, diode D ₃With D ₄, resistance R ₁₉And capacitor C ₁₈With C ₁₉Form D ₃, D ₄, R ₁₉, C ₁₈And C ₁₉Make voltage multiplying rectifier, IC _3DBe non-inverting buffer.Delay circuit (12) comprises by diode D ₅With D ₆And resistance R ₂₀That form or door, and by diode D ₇, resistance R ₂₁And capacitor C ₂₀The delay circuit of forming.Electronic switch (13) is by hex inverter IC _2FConstitute.The alert acoustic-electric road of hummer (14) is by triode BG ₃With BG ₄, light emitting diode D ₈, alert sound integrated circuit (IC) ₄, hummer HTD and resistance R ₂₃To R ₂₅Form.Under normal circumstances, IC _2FThe output high level, D ₈Pilot lamp is bright.When appearance is unusual, IC _2FThe output electronegative potential, IC ₄Work, hummer HTD reports to the police.Capacitor C ₁₆With C ₂₁And resistance R ₂₂It is power source deoupling circuit.

Claims (3)

1, a kind of anti-burglar alarm that loses of thing of taking is characterized in that circuit part comprises:

A) transmitter, it is formed by low-frequency oscillation and driving circuit (1) with by the higher-order of oscillation radiating circuit (2) that has the ring-type printed antenna that it drove;

B) reception alarm, it is by the superregenerative detection circuit (3) that has the ring-type printed antenna, to give amplifying circuit (4) from the low frequency signal that frequency-modulated wave detects amplifies, low frequency signal after the amplification is given selective frequency amplifier circuit (5) again and is done the frequency-selecting amplification, the frequency-selecting amplifying signal is given amplitude discrimination comparator circuit (6), divide two-way output by the high useful signal of its selecting range, one the tunnel gives shaping circuit (7), another road is given detecting circuit (8) and is produced an electric potential signal, and it is anti-phase to give negative circuit (10) with this electric potential signal, signal after shaping circuit (7) shaping is divided into two-way, one the tunnel gives the code signal that monostable circuit (9) generates this alarm, another road is given frequency comparison circuit (11) and is sent here to the code signal of frequency comparison circuit (11) with monostable circuit (9) and compare, the rectification current potential of the result that frequency comparison circuit (11) will compare after negative circuit (10) is anti-phase is defeated by delay circuit (12), whether the signal that delay circuit (12) is done after the delay process is given electronic switch (13), reported to the police by electronic switch (13) the control alert acoustic-electric road of hummer (14).

2, alarm as claimed in claim 1 is characterized in that, low-frequency oscillation and driving circuit (1) are by hex inverter IC _1ATo IC _1F, resistance R ₁And capacitor C ₁Form, higher-order of oscillation radiating circuit (2) is by triode BG ₁, resistance R ₂With R ₃, capacitor C ₂To C ₄, diameter is the ring-type printed antenna L of 2.5cm ₁And inductance L ₂Form.

As claim 1,2 described alarms, it is characterized in that 3, superregenerative detection circuit (3) is by triode BG ₂, resistance R ₄To R ₇, capacitor C ₅To C ₈, diameter is the ring-type printed antenna L of 2.5cm ₃And inductance L ₄With L ₅Form, amplifying circuit (4) is by hex inverter IC _2A, resistance R ₈With R ₉And capacitor C ₉Form, selective frequency amplifier circuit (5) is by hex inverter IC _2B, resistance R ₁₀To R ₁₂And capacitor C ₁₀To C ₁₂Form, amplitude discrimination comparator circuit (6) is by resistance R ₁₃With R ₁₄Form, shaping circuit (7) is by hex inverter IC _2DConstitute, detecting circuit (8) is by hex inverter IC _2C, diode D ₁With D ₂, resistance R ₁₅And capacitor C ₁₃With C ₁₄Form, monostable circuit (9) is by four XOR gate IC _3AWith IC _3B, resistance R ₁₆To R ₁₈And capacitor C ₁₅With C ₁₇Form, negative circuit (10) is by hex inverter IC _2EConstitute, frequency comparison circuit (11) is by four XOR gate IC _3CWith IC _3D, diode D ₃With D ₄, resistance R ₁₉And capacitor C ₁₈With C ₁₉Form, delay circuit (12) comprises by two utmost point fulgurite D ₅With D ₆And resistance R ₂₀That form or door, and by diode D ₇, resistance R ₂₁And capacitor C ₂₀The delay circuit of forming, electronic switch (13) is by hex inverter IC _2FConstitute, the alert acoustic-electric road of hummer (14) is by triode BG ₃With BG ₄, light emitting diode D ₈, alert sound integrated circuit (IC) ₄, hummer HTD and resistance R ₂₃To R ₂₅Form.