CN2153098Y - Ultrasonic burglar alarm - Google Patents

Abstract

The utility model relates to an ultrasonic anti-theft alarm with an electronic cipher switch. The utility model comprises an ultrasonic transmitting circuit, an ultrasonic receiving circuit, a doppler signal detection amplifying circuit, a power supply circuit, an alarm circuit, a cipher input circuit and an electronic lock circuit which is used for judging whether the input cipher is correct or not. When a target intrudes or the error code is input, the logic control circuit of the alarm signal and an alarm control circuit can be output; according to the alarm signal, the alarm control circuit can control the alarm circuit to give an alarm.

Description

Ultrasonic burglar alarm

The utility model relates to a kind of Ultrasonic Intruder Alarm, relates in particular to a kind of Ultrasonic Intruder Alarm that has the electronic cipher switch.

Though the ultrasound wave alarm of prior art can utilize Doppler effect perception moving target, can't differentiate enemy and we, the false-alarm phenomenon can take place when owner is close, brought inconvenience to use.

Thereby the purpose of this utility model is to provide a kind of password that can utilize accurately to discern the Ultrasonic Intruder Alarm that the invador accurately reports to the police.

In order to achieve the above object, Ultrasonic Intruder Alarm of the present utility model comprises to guard space and launches hyperacoustic ultrasonic transmitter; Receive the ultrasonic receiver of reflected signal; From reflected signal, detect movable signal and amplify, the Doppler signal detecting amplifying circuit of shaping, output; The potential circuit of operating voltage is provided; Be used to produce the warning circuit of alarm sound, it is characterized in that, also comprise the password input circuit that is used to input password, be used to judge the electronic lock circuit that whether is consistent of the password of inputing with setting code, produce the logic control circuit of alerting signal according to the output of the output of Doppler signal detecting amplifying circuit or electronic lock circuit, the alarm control circuit of reporting to the police according to alerting signal control warning circuit.

Ultrasonic Intruder Alarm of the present utility model can accurately be discerned the advantage that the invador effectively reports to the police owing to have cipher switch thereby have.Its advantage is in particular in: when (1) need enter the forbidden zone as owner, can make alarm withdraw from the state of alert by handling code keypad; (2) alarm is on the alert down, if there is the people to invade, because the stranger can't know the cipher, when his continuous three key entry error codes, alarm will send police whistle sound and report to the police; (3) invador can trigger warning circuit if the disconnection alerting signal produces any connecting line between circuit and power supply and warning circuit, therefore also has vandal-proof advantage.

Describe the utility model in detail below with reference to embodiment and accompanying drawing.

Fig. 1 is the structured flowchart of Ultrasonic Intruder Alarm of the present utility model.

Fig. 2 is the electrical schematic diagram of a kind of preferred embodiment of said structure block diagram; Wherein Fig. 2 a is the electrical schematic diagram that alerting signal produces circuit, and Fig. 2 b is the electrical schematic diagram of power supply and warning circuit.

Referring to Fig. 1.Ultrasonic Intruder Alarm of the present utility model comprises ultrasonic receiver 2 from reception reflected signal to a certain guard space that launch hyperacoustic ultrasonic transmitter 1; From above-mentioned reflected signal, detect movable signal and amplify shaping, the Doppler signal detecting amplifying circuit 3 of output; Comprise a code keypad, be used to input the password input circuit 4 of password; Input end is connected, has according to the different inputs of password the electronic lock circuit 5 of corresponding output with password input circuit 4 output terminals; The output of Doppler signal detecting amplifying circuit 3 and electronic lock circuit 5 is carried out logic determines with correct identification invador's logic control circuit 6 whether; The output of logic control circuit is amplified and is converted to the alarm switch signal output alarm control circuit 7 with the work of control warning circuit; The alarm switch signal is amplified, triggers time-delay and converts the warning circuit 8 that police whistle sound is exported to; The power supply 9 that accumulator jar is charged; The under-voltage indicating circuit 10 of storage battery of indication user charging in time or replacing when accumulator jar voltage is on the low side.

Fig. 2 is the electrical schematic diagram according to a kind of preferred embodiment of the present utility model of Fig. 1 design, for the ease of diagram, Fig. 2 is divided into two parts, and wherein Fig. 2 a is the electrical schematic diagram that alerting signal produces circuit, and described alerting signal produces circuit and comprised above-mentioned ultrasonic transmitter 1, ultrasonic receiver 2, Doppler signal detecting amplifying circuit 3, password input circuit 4, electronic lock circuit 5, logic control circuit 6, alarm control circuit 7.Fig. 2 b is the electrical schematic diagram of power supply and warning circuit, referring to Fig. 2 a, JD ₃, JD ₄, JD ₅, JD ₆Four phase inverters and resistance R ₃₆-R ₃₉, crystal JT, ultrasonic emitting element FS constituted ultrasonic transmitter 1 jointly, phase inverter JD wherein ₅, JD ₆, resistance R ₃₇-R ₃₉And crystal JT composition oscillatory circuit, producing frequency is the square wave of 40KHz, through phase inverter JD ₃, JD ₄Shaping is passed through resistance R after amplifying ₃₆Launch to the certain space zone by ultrasonic emitting element FS.According to Doppler effect, if there are objects moving in above-mentioned space, the signal that then reflects will have two kinds of different frequencies.Ultrasound wave receiving circuit 2 comprises ultrasound wave receiving element JS, and it is sent into by triode T after receiving the signal that reflects ₁, T ₂, resistance R ₁-R ₇, capacitor C ₁-C ₄The pre-amplification circuit of forming 31 amplifies; Capacitor C ₅, C ₆, diode D ₁, D ₂And resistance R ₈Form detecting circuit 32, it will be the high-frequency signal elimination of 40KHz through the amplifying signal medium frequency, and allow low frequency signal (Doppler signal that is promptly produced by moving target) wherein pass through, and this signal is through resistance R ₉, R ₁₀, capacitor C ₇Be admitted to the emitter follower JA of series connection with it ₄Amplify.JA can be for example CM324 integrated transporting discharging element, wherein JA ₁, JA ₃Two amplifier elements and resistance R ₁₁-R ₁₆, capacitor C ₈-C ₁₃Constituted rejector circuit 33 jointly, the signal after amplifying has been carried out filtering, stoped wherein the power frequency interference signals of 50Hz and 100Hz to be passed through, and then this signal is sent into by JA ₂And resistance R ₁₇, R ₁₈, capacitor C ₁₄, C ₁₅The low-pass filter circuit of forming 34 with elimination wherein 1.2KHz with the signal of upper frequency, after capacitor C ₁₇Signal is sent into the shaping amplification circuit 35 of series connection with it, and described shaping amplification circuit is by the triode T as amplifier element ₃, T ₄, resistance R ₂₀-R ₂₆, capacitor C ₁₈, as the diode D of shaping ₃, D ₄And be used for regulating the rheostat RP of sensitivity ₁Form, the Doppler signal after amplifying through shaping is through T ₄Collector output, above-mentioned pre-amplification circuit 31, detecting circuit 32, band resistance circuit 33, low pass circuit 34, shaping amplification circuit 35 have constituted Doppler signal detecting amplifying circuit 3 jointly.Shown in Fig. 2 a, password input circuit 4 of the present utility model comprises cipher inputting keyboard KB, hummer FM, light emitting diode FG ₂, with by JD ₁, JD ₂, C ₃₃, C ₃₄, R ₄₀-R ₄₂, D ₁₅The oscillatory circuit of forming; Electronic lock circuit 5 comprises an electronic lock JC and a capacitor C ₂₁-C ₃₂, resistance R ₂₉-R ₃₅, diode D ₉-D ₁₄And 6V power supply BT ₁Wherein JC can be a UA3730 electronic lock for example, and its input end 5-11 is connected in the mode shown in scheming with each key on the cipher inputting keyboard, and 14 ends of every key entry one digit number sign indicating number JC can be exported a low level, make hummer work, send one " toot " sound.Direct current+12V power supply is by diode D ₀, triode T ₆, resistance R ₃₂Be connected on the end pin 16 of JC T ₆Output terminal serial connection capacitor C ₂4 and R ₃₁Constitute charge circuit, diode D ₉With resistance R ₃₁Formation discharge loop in parallel.The 16 ends output of JC is by two Sheffer stroke gate SY, diode D ₈Sheffer stroke gate JB with the output input logic control circuit 6 of Doppler signal detecting amplifying circuit 3 ₄In, and 15 ends and the JB of JC ₄Output import another Sheffer stroke gate JB together ₃In.JC ₂Can adopt for example MC4093 two input Schmidt Sheffer stroke gate elements.JB ₃Output by diode D ₅, resistance R ₂₇To capacitor C ₂₀Charging also is added on the alarm control circuit 7.Described alarm control circuit 7 is by triode T ₅, T ₇, resistance R ₂₈-R ₄₅, diode D ₇, relay J ₁And light emitting diode FG ₁Form, work as C ₂₀On voltage rise to and be higher than T ₅V _BEThe time, T ₅Conducting, relay J ₁Coil electricity excitation, the contact is transformed into B by A, makes the current potential of electric connection 5 drop to zero potential, and connect warning circuit and report to the police (stating as follows), simultaneously, on the electric connection 1+12V voltage is by diode D ₀Make T ₇Conducting, FG ₁Luminous, showing has the invador, stores at accumulator jar under the situation of electric weight deficiency, and warning circuit can not send police whistle sound because voltage is on the low side, and this moment, the user can be according to FG ₁Luminously judge that the invador is arranged.

Further describe the course of work of the present utility model below in conjunction with Fig. 2 a.Before starting working, the output terminal pin 15,16 of JC all locates noble potential " 1 ", the user is when being provided with password, elder generation's key feeding cipher connects " # " key, at this moment then, the 16 ends output of JC is changed to " 0 ", when the user need enter the security area, elder generation is key feeding cipher again, again by " # " key, at this moment, 16 ends of JC revert to " 1 " again.The current potential of JC15 end only just can be reduced to " 0 " when the stranger keys in three error codes continuously.Referring to Fig. 2 a, password is set before, 16 of JC is " 1 ", makes T ₆Because of V _BEAdd forward voltage and end that+12V operating voltage can't be added to alerting signal and produce in the circuit, alerting signal can't produce, and does not therefore report to the police; After sign indicating number is set, because 16 ends of JC are reduced to " 0 ", T ₆Because of base stage obtains the bias voltage conducting, R is passed through in its output ₃₁To C ₂₄Charging, and pass through D ₉, R ₃₁Discharge makes JB ₄/ 12 are upgraded to noble potential " 1 ", at this moment, because T ₆Conducting, JD ₁, JD ₂The oscillatory circuit of forming obtains operating voltage, and its output makes the light emitting diode FG on the cipher inputting keyboard ₂Luminous, show that alarm has entered the state of alert.Simultaneously, ultrasonic receiver 2 and Doppler signal detecting amplifying circuit 3 also obtain 12V voltage and start working, if do not find moving target, T ₄Be output as electronegative potential " 0 ", then JB ₄Be output as " 1 ", JG/15 exports " 1 ", JB ₃/ 10 are output as " 0 ", still disconnect alarm circuit; Find to have movable signal, T if establish the sign indicating number back ₄Be output as " 1 ", then JB ₄Be output as " 0 ", at this moment JB ₃Be output as " 1 ", this noble potential is to C ₂₀UC is worked as in charging ₂₀Greater than T ₅V _BEThe time, T ₅Conducting is imported alarm circuit with alerting signal, and alarm sends police whistle sound and reports to the police; When the invador is continuous when keying in error codes three times, the current potential of JC/15 is reduced to " 0 ", at this moment, and JB ₃Output one be decided to be " 1 ", connect alarm circuit; When owner need enter the security area, input once more behind the password by " # ", then 16 pin of JC are changed to " 1 ", T again ₆End, the operating voltage that alerting signal produces circuit is cut off, and does not report to the police.

Fig. 2 b shows the electrical schematic diagram of power supply of the present utility model and warning circuit.Wherein, alternating current 220V power supply, transformer B201, rectifier bridge D ₂₀₁-D ₂₀₄, diode D ₂₀₅-D ₂₀₈, voltage stabilizer JC201, resistance R ₂₀₁-R ₂₀₄, capacitor C ₂₀₁-C ₂₀₄, K switch ₁, the 12V accumulator jar, electric connection 1,2,5 has constituted power supply 9.When starting working, the closed K of elder generation ₁, the 220V alternating current is through B ₂₀₁Step-down, D ₂₀₁-D ₂₀₄Bridge rectifier, C ₂₀₁Filtering, JC ₂₀₁After the voltage stabilizing, lead up to D ₂₀₇Make on the electric connection 1 to have+12V voltage and for the under-voltage indicating circuit 10 of storage battery provides voltage, another road is through R ₂₀₃, K ₁Accumulator jar is charged.After disconnecting AC power, alarm can be powered by accumulator jar.JE can adopt for example LM324 operational amplifier, wherein operational amplifier JE3 and resistance R ₂₀₆-R ₂₁₀, capacitor C ₂₀₆, diode D ₂₁₀, stabilivolt D ₂₁₁, LED formed the under-voltage indicating circuit 10 of storage battery.Under the normal condition, if battery voltage is passed through R ₂₀₈To C ₂₀₆Charging, JE ₃Output terminal 8 be noble potential, LED ends; When accumulator jar voltage is lower than a setting value, UC ₆Reduce JE ₃10 terminal potentials reduce, its output correspondingly is converted to electronegative potential, the LED conducting is sent, indication user's inductive charging or replacing accumulator jar.The principle of work of warning circuit 8 is described below in conjunction with Fig. 2 b.When alarm control circuit 7 produces alerting signal is relay J ₁Contacting B point the time, electric connection 5 is grounded that (see Fig. 2 a), this low level is sent into comparer JE ₄In make after comparing its output terminal 14 produce noble potentials, and pass through R ₂₁₃, D ₂₁₂To C ₂₀₇Rapid charge is through duration of charging t ₁, UC ₇Reach setting value, trigger JE ₂State turnover output high level passes through R again ₂₁₄, D ₂₁₃To C ₂₀₀Charging is through duration of charging t ₂, touch JE ₁The output high level is sent into JF ₄Power end 14.Suppose that alerting signal just disappears in a short period of time, is stored in capacitor C ₂₁₇On electric weight will pass through R ₂₁₂Discharge, R ₂₁₂Resistance is bigger, thereby discharge time is longer, during this period, and JE ₂Still can keep noble potential output, and to C ₂₀₀Charging is reported to the police to guarantee to trigger effectively.JF can adopt for example MC4069 six Sheffer stroke gate elements among the figure.JF ₂, JF ₃, resistance R ₂₂₂-R ₂₂₇, capacitor C ₂₁2, diode D ₂₁₅, D ₂₁₆Formed the oscillating signal generator, the alerting signal of generation low frequency is also sent into by JF ₁, JF ₆And resistance R ₂₁₈-R ₂₂₁, capacitor C ₂₈₁-C ₂₁₁The high-frequency oscillation signal generator of forming produces the siren alerting signal through modulation, and input is mainly by triode T ₂₀₁-T ₂₀₆In the push-pull amplifier of forming, through amplifying the siren chimes of doom of rear drive loudspeaker output high-decibel.

By among Fig. 2 as can be seen, if the invador disconnects electric connection (1) or (2), triode T in the alarm control circuit 7 then ₇, operating voltage ends no current output on the electric connection 5, JE owing to being cut off ₄13 terminal potentials be lower than 12 ends, JE ₁The output high level triggers and reports to the police.If the invador cuts off electric connection (5), to trigger warning with above-mentioned reason, as seen the invador disconnects any connecting line between alerting signal generation circuit and power supply and warning circuit, all can trigger warning circuit, so the utility model also has vandal-proof advantage.

In the described scope of the utility model claim, those skilled in the art still can make amendment to the foregoing description, and these modifications all should be thought and fall within the protection domain of the present utility model.

Claims (4)

1, a kind of Ultrasonic Intruder Alarm comprises: launch hyperacoustic ultrasonic transmitter to guard space; Receive the ultrasonic receiver of reflected signal; From reflected signal, detect movable signal and amplify, the Doppler signal detecting amplifying circuit of shaping, output; The power circuit of operating voltage is provided; Be used to produce the warning circuit of alarm sound; It is characterized in that, also comprise the password input circuit that is used to input password; Be used to judge the electronic lock circuit that whether is consistent of the password of inputing with setting code; Produce the logic control circuit of alerting signal according to the output of the output of Doppler signal detecting amplifying circuit or electronic lock circuit; Alarm control circuit according to the warning of alerting signal control warning circuit.

2, Ultrasonic Intruder Alarm as claimed in claim 1 is characterized in that, described password input circuit comprises a cipher inputting keyboard.

3, Ultrasonic Intruder Alarm as claimed in claim 1 or 2, it is characterized in that, described alarm control circuit comprises that output terminal is connected to the first transistor of relay coil and the transistor seconds of connecting with relay contact, and described the first transistor base stage is connected with described logic control circuit output terminal.

4, Ultrasonic Intruder Alarm as claimed in claim 1 or 2, it is characterized in that, described power circuit comprises and is used to provide the accumulator jar of operating voltage and the power supply that accumulator jar is charged, and also comprises the under-voltage indicating circuit of storage battery that produces indicator signal when accumulator jar voltage is lower than designated value.

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