CN2141102Y - Infrared burglar alarm - Google Patents

Infrared burglar alarm Download PDF

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Publication number
CN2141102Y
CN2141102Y CN 92245107 CN92245107U CN2141102Y CN 2141102 Y CN2141102 Y CN 2141102Y CN 92245107 CN92245107 CN 92245107 CN 92245107 U CN92245107 U CN 92245107U CN 2141102 Y CN2141102 Y CN 2141102Y
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China
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circuit
switch
input end
signal
alarm device
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Expired - Fee Related
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CN 92245107
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Chinese (zh)
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王弘冀
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Individual
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Individual
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Abstract

The utility model discloses an infrared burglar alarm which can identify incomers effectively, comprising an infrared transceiver circuit, a variable numerical code control circuit, an alarm switch circuit, an alarm signal locking circuit, an alarm signal generator, a sound reproducer, and a power supply circuit. The variable numerical code control circuit can be used to set the password and relieve the alarm. The action of the burglar alarm is controlled by the infrared transceiver circuit and the variable numerical code control circuit jointly, effectively identifying the incomers without fail and removing error alarms and false alarms. In addition, the burglar alarm which is provided with the function of automatic switchover of alternating and direct current power supply can be connected to the outside alarm network conveniently.

Description

Infrared burglar alarm
The utility model relates to burglar alarm, relates in particular to a kind of infrared anti-theft alarm device.
Though existing infrared anti-theft alarm device can perception have or not personnel to enter a country, actually or can not discern owner immigrant burglar effectively, so the false-alarm phenomenon takes place, there is inconvenience during use through regular meeting.
The purpose of this utility model is to provide a kind of infrared anti-theft alarm device that can effectively discern the immigrant.
To achieve these goals, infrared anti-theft alarm device of the present utility model comprises the infrared receiving/transmission circuit of being made up of infraluminescence and receiving element; The variable digital control circuit of forming by at least two number decoding circuits and at least one comparison signal compositor; Be connected the alarm switch circuit of infrared receiving/transmission circuit and variable digital control circuit output terminal; Be connected the alerting signal generator of alarm switch circuit output terminal, be connected the player and the power circuit of alerting signal generator output end.
Digital circuit in the above-mentioned variable digital control circuit comprises the control signal lock of being made up of the memory trigger, the signal comparator of forming by XOR gate, be connected to the control signal switch of control signal lock two input ends and restore switch, and the initialize switch that is connected signal comparator one input end.
Adopt infrared anti-theft alarm device of the present utility model, because the action of alerting signal generator is jointly controlled by infrared receiving/transmission circuit and variable digital control circuit, so before owner enters the security area, can remove by the password that presets and report to the police, and when the burglar enters the security area, can in time give the alarm by playback circuit, make the infrared anti-theft alarm device can discern the immigrant like clockwork therefrom, eliminate the alert and false-alarm of mistake, guarantee the accuracy of the behavior of reporting to the police.
Below in conjunction with drawings and Examples infrared anti-theft alarm device of the present utility model is described in further detail.
Fig. 1 is the structured flowchart of the utility model infrared anti-theft alarm device.
Fig. 2 is the electrical schematic diagram of a preferred embodiment of the utility model infrared anti-theft alarm device.
Referring to Fig. 1, infrared anti-theft alarm device of the present utility model comprises in order to the perception infrared receiving/transmission the circuit 1 whether someone enters a country, in order to the variable digital control circuit 2 that allows owner's presetting cipher and releasing report to the police, in order to the alarm switch circuit 3 of reporting to the police according to the output signal control warning device of infrared receiving/transmission circuit 1 and variable digital control circuit 2, with so that the alerting signal lock-in circuit 4 that alerting signal continue to produce, in order to produce the alerting signal generator 5 of alerting signal, in order to alerting signal is amplified and is converted to player 6 and the power circuit 7 and the doorbell circuit 8 of alarm sound.
Fig. 2 is the electrical schematic diagram according to a preferred embodiment of the utility model infrared anti-theft alarm device of block diagram design shown in Figure 1, now in conjunction with Fig. 1 and Fig. 2 its various piece and effect thereof is described respectively.Infrared receiving/transmission circuit 1 comprises infrarede emitting diode D 2, current-limiting resistance R 16, photosensitive tube T 1And by transistor T 2And base biasing resistor R 15With emitter resistance R 13The amplifier of forming, wherein, amplifier input terminal is connected on the emitter of photosensitive tube.During work, photosensitive tube T 1Reception is by infrarede emitting diode D 2The light that sends, and convert this light signal to electric signal, the amplifying circuit of delivering to the back one-level amplifies, in resistance R 13Voltage signal of last generation.As infrarede emitting diode D 2When the light that sends is blocked, photosensitive tube T 1No signal output, resistance R 13On voltage be zero.
Variable digital control circuit 2 comprises by initialize switch K 2, the control signal K switch 1, memory trigger S 1, XOR gate IC 7And resistance R 1And R 2The first digital circuit of forming; By initialize switch K 4, the control signal K switch 3, memory trigger S 2, XOR gate IC 8And resistance R 3And R 4The second digital circuit of forming; By initialize switch K 6, the control signal K switch 5, memory trigger S 3, XOR gate IC 9And resistance R 5And R 6The 3rd digital circuit of forming; By rejection gate IC 10, IC 11And IC 12The comparison signal compositor of forming; By transistor T 4, light emitting diode D 7And resistance R 17Operation monitoring circuit of forming and recovery K switch 7And resistance R 7Wherein, the control signal K switch of the first digital circuit 1Be connected transistor T 4Base stage and memory trigger S 1R end between.And pass through resistance R 1With S 1R end be connected to power circuit 7.Memory trigger S 1S end pass through resistance R 7Be connected to power circuit, and by restoring K switch 7Be connected to transistor T 4Base stage.XOR gate IC 7An input end X 2Be connected to memory trigger S 1Q end, another input end X 1Then by initialize switch K 2Be connected to ground, pass through resistance R simultaneously 2Be connected to power circuit 7.Therefore the method for attachment of the second digital circuit and the 3rd digital circuit and the first digital circuit identical no longer repeat.Meanwhile, the output terminal of the first digital circuit and the second digital circuit is connected respectively to the rejection gate IC in the comparison signal compositor 10Two input ends, IC 10Output terminal be connected to rejection gate IC 11An input end, IC 11Another input end grounding, the output terminal of its output terminal and the 3rd digital circuit is connected to rejection gate IC respectively 12Two input ends.In addition, transistor T 4Grounded emitter, light emitting diode D 7Negative pole be connected to transistor T 4Collector, its positive pole passes through resistance R 17Be connected to power circuit 7.
Above-mentioned K switch 1, K 3, K 5And K 7For example adopt moving box-like switch, closure when hand is pressed, hand is decontroled the back and is disconnected.K switch 2, K 4And K 6For example adopt pushbutton switch, click closure, click disconnection again.
Be the course of work that example illustrates this variable digital control circuit 2 still below with the first digital circuit.With initialize switch K 2Close XOR gate IC 7Input end X 1On current potential be low by high-transformation.Click K switch 7, memory trigger S 1S end pass through transistor T 4Transient earthing, trigger S 1Set, its output terminal Q exports high level signal, and this high level signal is delivered to XOR gate IC 7Input end X 2, this moment IC 7Output level is high.At this moment, if click the control signal K switch again 1, trigger S then 1R end pass through transistor T 4Transient earthing, trigger S 1Output terminal Q on level upset for low.Meanwhile, XOR gate IC 7Output level be low also by high tumble.Therefore, in sum, memory trigger S 1In fact be exactly a control signal lock, as long as K switch 1Imported a control signal, this trigger S 1Just this control signal is locked, until S 1By zero clearing again.And XOR gate IC 7Be actually a signal comparator, it is in order to compare via K switch 1The signal of control input with originally via K switch 2Whether preset the signal of being imported identical, if two identical output low level signals of signal, if two signal high level signals of then exporting inequality.
By rejection gate IC 10-IC 12The comparison signal that the comparison signal compositor of forming is exported in order to synthetic first to the 3rd digital circuit, and provide an identification signal.Have only when the comparison signal of first to the 3rd digital circuit output is " low ", the output level of this compositor just is " height ".In addition, the effect of operation monitoring circuit is by light emitting diode D 7State come monitoring switch K 1, K 3, K 5And K 7Operation whether effective.
Alarm switch circuit 3 is by OR-NOT circuit IC 13Constitute, the output terminal that one input end is connected to aforementioned infrared receiving/transmission circuit 1 (is a transistor T 2Emitter), another input end is connected to the output terminal of variable digital control circuit 2 and passes through resistance R 11Be connected to power circuit 7, its output terminal is connected to alerting signal lock-in circuit 4.During work, when arbitrary output level of infrared transmission circuit 1 or variable digital control circuit 2 when being high, circuit 3 is the output low level signal, only is when low when the output of circuit 1 and circuit 2, and circuit 3 is just exported high level signal.
Alerting signal lock-in circuit 4 comprises two OR-NOT circuit IC that are connected in series 14And IC 15, by diode D 4And resistance R 8Buffer circuit and a double-pole two-way switch K of forming 9Wherein, gate circuit IC 14An input end A 1By diode D 4Be connected to the output terminal of prime alarm switch circuit 3, and pass through resistance R 8Ground connection; Gate circuit IC 15An input end B 1Be connected to IC 14Output terminal, another input end B 2Be connected to the output terminal of aforementioned variable digital control circuit 2; IC 15Output terminal then be connected respectively to the input end and the gate circuit IC of back level alerting signal generator 5 14Another input end A 2, and can pass through diode D 5Be connected to the external alert network.K switch 9One the tunnel is connected in power circuit 7 AND circuit IC 14A 1Between the end, another road is attempted by K switch 7On.During work, be output as height as if alarm switch circuit 3, then gate circuit IC 14A 1Terminal potential is high, gate circuit IC 15B 1Terminal potential is low, and if this moment is B 2Terminal potential (by the output signal decision of variable digital control circuit 2) also is low, then IC 15The output high level signal also starts late-class circuit 5 actions.And, IC 15The high level signal of output feeds back to IC 14A 2End, at this moment, even A 1The current potential of end is returned to low, IC 15Output level still remain height, realized locking action thus to alerting signal.In addition, K switch 9Effect be when emergency situation, to be used for force reporting to the police, and the effect of buffer circuit is in order to isolate the influence of front stage circuits when forcing to report to the police.
Alerting signal generator 5 for example adopts KD9561 alerting signal integrated package, and its output terminal is connected to back level player 6.Its working power end is connected to the output terminal of above-mentioned alerting signal lock-in circuit 4, and when circuit 4 is output as when high, generator 5 promptly gets electric generation output.
Player 6 is by transistor T 3Form with loudspeaker Y, the output signal of prime alerting signal generator 5 is through transistor T 3Deliver to loudspeaker Y playback after the amplification.
Power circuit 7 comprises transformer B, by bridge rectifier D zWith filter capacitor C 1The current rectifying and wave filtering circuit of forming is by voltage stabilizing diode D 3And resistance R 14The mu balanced circuit of forming is by capacitor C 2And resistance R 12The delay circuit of forming, and by battery E and diode D 1The standby power supply circuit that is composed in series.Wherein, the standby power supply circuit is attempted by on the above-mentioned current rectifying and wave filtering circuit, when civil power cuts off the power supply or is cut off, can power to this infrared anti-theft alarm device.D in the mu balanced circuit 3And R 14Be connected in series back and receiving on the current rectifying and wave filtering circuit its objective is to all gate circuits in the warning device provide stable operating voltage, and delay circuit C 2And R 12Effect be the moment of setting up when working power, for what a initial value aforementioned each digital circuit is provided with.
When this infrared anti-theft alarm device uses, can be with infraluminescence pipe D 2With photosensitive tube T 2Be divided into the shelter of inlet both sides such as door, window, variable digital control circuit 2 is arranged on door, window or the wall, owner can pass through digital initialize switch K 2, K 4And K 6Password is imported variable digital control circuit 2.The agreement K switch 2, K 4And K 6Be " 1 " sign indicating number when closed, be " 0 " sign indicating number (consider the operate as normal of this burglar alarm, generally do not use 000 yard) during disconnection.When the needs warning device enters the state of alert, can click K switch 7, make control signal lock S 1, S 2And S 3Output potential be height, variable digital control circuit 2 enters status recognition.At this moment, if any burglar's immigration, infraluminescence pipe D 2The light wave that sends is promptly interdicted, photosensitive tube T 1No-output, OR-NOT circuit IC 13Input end C 1Be low level.Because the burglar does not know the password that owner is set, so gate circuit IC 12Output level, i.e. IC 13Another input end C 2Level also be low, thereby at IC 13A high level signal of output terminal output and deliver to gate circuit IC 14A 1End makes gate circuit IC 15Output level be high, drive alerting signal generator 5 and send alerting signal.Because the locking action of aforementioned alerting signal lock-in circuit 4 is so even the burglar crosses the security area with very fast speed, alerting signal will continue to send, till owner sounds all clear.
And before owner's immigration, as long as according to the Password Operations control signal K switch that presets 1, K 3And K 5, can make variable digital control circuit 2 output high level, and the driving gate IC circuit 15Output low level, thus make warning device remove the state of alert.
In order to make full use of unnecessary element and to increase the additional function of this warning device, also inserted one by rejection gate IC at the input end of the player 6 of this warning device shown in Figure 2 16, IC 17, capacitor C 3, resistance R 9, R 10And K switch 8The doorbell circuit of forming 8.
Certainly, as a kind of conversion, the digital circuit in the above-mentioned variable digital control circuit 2 also can adopt more than two or four.As another kind of conversion, by transistor T 4, light emitting diode D 7And resistance R 17The operation monitoring circuit of forming also can save, and with the former T that is connected 4K switch on the base stage 1, K 3, K 5And K 7The direct ground connection of link.

Claims (8)

1, a kind of infrared anti-theft alarm device comprises the infrared receiving/transmission circuit of being made up of infraluminescence and receiving element; In order to produce the alerting signal generator of alerting signal; Be connected the player and the power circuit of alerting signal generator output end; It is characterized in that it also comprises variable digital control circuit and the alarm switch circuit of being made up of at least two number decoding circuits and at least one comparison signal compositor, two input ends of described alarm switch circuit are connected to the output terminal of described infrared receiving/transmission circuit and variable digital control circuit, and the output terminal of described alarm switch circuit is connected the input end of described alerting signal generator.
2, infrared anti-theft alarm device as claimed in claim 1 is characterized in that, described digital circuit comprises by the control signal lock formed of memory trigger, the signal comparator of being made up of XOR gate; Be connected to the control signal switch of described control signal lock two input ends and restore switch, and the initialize switch that is connected described signal comparator one input end; Another input end of described signal comparator is connected with the output terminal of described control signal lock, and the output terminal of described signal comparator is connected with the input end of described comparison signal compositor; The input end that input end that described control signal lock is connected with the control signal switch and described signal comparator are connected with initialize switch is connected to described power circuit by a resistance respectively.
3, infrared anti-theft alarm device as claimed in claim 1 or 2, it is characterized in that further comprising the alerting signal lock-in circuit that is connected between described alarm switch circuit and the described alerting signal generator, described alerting signal lock-in circuit comprises the lock that two OR-NOT circuit that are connected in series by circulation are formed; Be connected the buffer circuit of forming by diode and resistance of described lock input end.
4, infrared anti-theft alarm device as claimed in claim 2, it is characterized in that, described variable digital control circuit further comprises the operation monitoring circuit that is connected between described power circuit and described control signal switch and the recovery switch, described operation monitoring circuit comprises a transistor, is connected a light emitting diode and the current-limiting resistance thereof of this transistor output terminal.
5, infrared anti-theft alarm device as claimed in claim 1 or 2, it is characterized in that, described power circuit comprises AC transformer, the current rectifying and wave filtering circuit of forming by bridge rectifier and filter capacitor, the mu balanced circuit of forming by voltage stabilizing diode and divider resistance, delay circuit of forming by Resistor-Capacitor Unit and the standby power supply of forming by battery and isolating diode, described delay circuit is connected in parallel on the described voltage stabilizing diode, and described standby power supply is connected in parallel on the described current rectifying and wave filtering circuit.
6, infrared anti-theft alarm device as claimed in claim 1 or 2 is characterized in that further comprising the doorbell circuit that is connected described playback circuit input end.
7, infrared anti-theft alarm device as claimed in claim 3, it is characterized in that described alerting signal lock-in circuit further comprises and being connected between described control signal lock input end and the described power circuit and the manual alarm switch of described recovery switch ends.
8, infrared anti-theft alarm device as claimed in claim 1 or 2 is characterized in that further comprising being connected described alerting signal generator input end, in order to described infrared anti-theft alarm device is connected to the diode of external alert network.
CN 92245107 1992-12-26 1992-12-26 Infrared burglar alarm Expired - Fee Related CN2141102Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 92245107 CN2141102Y (en) 1992-12-26 1992-12-26 Infrared burglar alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 92245107 CN2141102Y (en) 1992-12-26 1992-12-26 Infrared burglar alarm

Publications (1)

Publication Number Publication Date
CN2141102Y true CN2141102Y (en) 1993-08-25

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Application Number Title Priority Date Filing Date
CN 92245107 Expired - Fee Related CN2141102Y (en) 1992-12-26 1992-12-26 Infrared burglar alarm

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CN (1) CN2141102Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112034317A (en) * 2020-08-31 2020-12-04 国网山东省电力公司电力科学研究院 Oscillation partial discharge voltage locking circuit, partial discharge test system and working method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112034317A (en) * 2020-08-31 2020-12-04 国网山东省电力公司电力科学研究院 Oscillation partial discharge voltage locking circuit, partial discharge test system and working method
CN112034317B (en) * 2020-08-31 2023-11-28 国网山东省电力公司电力科学研究院 Oscillating partial discharge voltage locking circuit, partial discharge test system and working method

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C19 Lapse of patent right due to non-payment of the annual fee
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