CN112185046A

CN112185046A - Household anti-theft alarm circuit

Info

Publication number: CN112185046A
Application number: CN202011077696.XA
Authority: CN
Inventors: 周天沛
Original assignee: Xuzhou College of Industrial Technology
Current assignee: Xuzhou College of Industrial Technology
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-01-05
Anticipated expiration: 2040-10-10
Also published as: CN112185046B

Abstract

A household anti-theft alarm circuit comprises a doorbell switch K1, an electromagnet KT1, a pyroelectric infrared sensor IC3-1, a three-terminal voltage-stabilizing integrated circuit IC1, a voltage comparator IC2, a photoelectric coupler IC4-1, a photoelectric coupler IC5, an 8-pin time-base integrated circuit IC6, resistors R1-R13, resistors R24-R26, electrolytic capacitors C1-C7, electrolytic capacitors C12-C13, a capacitor C14, an electrolytic capacitor C15, diodes D1-D3, a thyristor VS1, a piezoelectric piece XT1, a photoresistor Rs1, a bulb L1, a bidirectional SCR, an alarm switch S1, a relay and the like, wherein when no person is in a house, the household anti-theft alarm circuit can simulate the situation that a person is at home, so that a thief cannot be bristled and act, and when the thief enters the household anti-theft alarm circuit can be connected with a silicon controlled rectifier to dial the alarm switch to take a photo at the same time.

Description

Household anti-theft alarm circuit

Technical Field

The invention relates to an alarm circuit, in particular to a household anti-theft alarm circuit, and belongs to the technical field of household safety alarm.

Background

With the high incidence of indoor theft cases, how to prevent indoor theft and reduce property loss becomes an urgent matter.

The thief often judges whether someone is in the house through knocking the door or observing light night, if the thief judges nobody, will get into the house and steal, how to avoid this kind of phenomenon, it is very critical. It would be preferable if the owner could be notified in a timely manner and leave the corresponding evidence.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a family alarm system for saving nobody in a house, which can simulate that someone is at home when nobody is in the house, so that a thief dares not to move delicately, and can connect a dialing circuit and take a picture of the thief at the same time when the thief breaks into the house.

In order to realize the aim, the invention provides a household anti-theft alarm circuit, which comprises a doorbell switch K1, an electromagnet KT1 and a pyroelectric infrared sensor IC3-1 arranged in a monitored room, wherein the alarm circuit also comprises a three-terminal voltage-stabilizing integrated circuit IC1, a voltage comparator IC2, a photoelectric coupler IC4-1, a photoelectric coupler IC5, an 8-pin time base integrated circuit IC6, resistors R1-R13, resistors R24-R26, electrolytic capacitors C1-C7, electrolytic capacitors C12-C13, a capacitor C14, an electrolytic capacitor C15, diodes D1-3, triodes BG 1-BG 6, triodes BG 17-BG 18, a voltage-stabilizing diode DW1, potentiometers RP 1-RP 1, a thyristor 1, a piezoelectric sheet XT 72, a photoresistor 1, a light-sensitive resistor L1, a thyristor SCR 1, an SCR switch SCR 72S, a SCR 1, a rectifier button SB1, a rectifier relay and a rectifier relay 1-SB 1J, Normally open contact J1-2 of relay J1, normally open contact J2-1-1 of relay J2-1, normally closed contact J2-1-2 of relay J2-1, normally open contact J2-1-3 of relay J2-1, normally closed contact J2-1-4 of relay J2-1, relay J3-1, normally closed contact J3-1-1 of relay J3-1, relay J4, normally open contact J4-1 of relay J4, normally open contact J4-2 of relay J4, normally open contact J4-3 of relay J4, normally open contact J4-4 of relay J4, normally open contact J5 of relay J5, normally open contact J5-1 of relay J46 6, normally open contact J6-1 of relay J6, normally open contact J6-2 of relay J6, A relay J7, a normally open contact J7-1 of a relay J7, a relay J8, a normally open contact J8-1 of a relay J8, a normally open contact J8-2 of a relay J8,

two ends of an input port of a transformer B1 are respectively connected with a live wire L and a zero wire N, two ends of an output port of the transformer B1 are respectively connected with a pin 1 and a pin 2 of a rectifier stack UR, a pin 3 of the rectifier stack UR is respectively connected with the anode of an electrolytic capacitor C1 and a pin 1 of a three-terminal voltage-stabilizing integrated circuit IC1, a pin 3 of the three-terminal voltage-stabilizing integrated circuit IC1 is respectively connected with the anode of an electrolytic capacitor C2, one end of a normally-open contact 8-2 of a relay J8, one end of a resistor R7, a first fixed end of a potentiometer RP1, a sliding end of a potentiometer RP1, one end of a resistor R8, one end of a normally-open contact J4-4 of the relay J4, a port 2 of an alarm switch S1, one end of a normally-open contact J1-1 of the relay J1, one end of a normally-open contact J4-2 of the relay J4, one end of a normally-open contact J2-1 of the relay J2-1, and one, the two ends of the bulb L1 after being connected with the bidirectional thyristor SCR in series are respectively connected with a live wire L and a zero wire N, the other end of a normally open contact J8-2 of a relay J8 is connected with a normally open contact J4-3 of a relay J4 in series and then connected with a pin 3 of a voltage comparator IC2, the other end of a resistor R7 is respectively connected with a pin 6 of the voltage comparator IC2 and the negative electrode of a voltage stabilizing diode DW1, the second fixed end of a potentiometer RP1 is respectively connected with a pin 7 of the voltage comparator IC2 and one end of a photoresistor Rs1, the other end of the resistor R8 is respectively connected with a pin 4 of the voltage comparator IC2, a pin 8 of the voltage comparator IC2, a pin 11 of the voltage comparator IC2, the first fixed end of a potentiometer RP2 and the sliding end of a potentiometer RP2, a pin 1 of the voltage comparator IC2 is respectively connected with one end of a resistor R3 and one end of a resistor R4, a pin 2 of the voltage comparator IC2 is respectively connected with a positive pole C4 and a positive pole of, the 14 pin of the voltage comparator IC2 is connected with the anode of the electrolytic capacitor C5 and the 10 pin of the voltage comparator IC2 after being connected with the resistor R6 in series, the other end of the resistor R4 is connected with the anode of the electrolytic capacitor C3 and the 5 pin of the voltage comparator IC2, the 13 pin of the voltage comparator IC2 is connected with one end of the resistor R2, the other end of the resistor R3 is connected with the base of the triode BG1, the emitter of the triode BG1 is connected with one end of the resistor R1 and the other end of the resistor R2, the other end of the resistor R1 is connected with the gate of the bidirectional thyristor SCR, the 4 pin of the rectifier stack UR, the negative electrode of the electrolytic capacitor C1, the 2 pin of the three-terminal voltage-stabilizing integrated circuit IC1, the negative electrode of the electrolytic capacitor C2, the collector of the triode BG1, the negative electrode of the electrolytic capacitor C3, the negative electrode of the electrolytic capacitor C4, the negative electrode of the electrolytic capacitor C5, the 12 pin of the voltage comparator IC2, the positive electrode of the voltage-stabilizing diode DW1, the other end of the photoresistor Rs1 and the second fixed end of the potentiometer RP2 are all grounded;

the other end of a normally open contact J4-4 of the relay J4 is respectively connected with a pin 1 of a pyroelectric infrared sensor IC3-1, one end of a normally closed contact J3-1-1 of the relay J3-1, one end of a resistor R11, one end of a normally closed contact J2-1-4 of the relay J2-1, the anode of a thyristor VS1, a pin 2 series resistor R10 of the pyroelectric infrared sensor IC3-1 is connected with the base of a triode BG2, the collector of the triode BG2 is connected with a pin 2 of a photoelectric coupler IC4-1, a pin 1 series resistor R9 of the photoelectric coupler IC4-1 is connected with the other end of a normally closed contact J3-1-1 of the relay J3-1, a pin 3 of the photoelectric coupler IC4-1 is connected with the other end of a resistor R11, and a pin 4 of the photoelectric coupler IC4-1 is respectively connected with one end of a resistor R12, A control electrode of the thyristor VS1, a base electrode of the triode BG3 is connected with a first fixed end of the potentiometer RP3 and a sliding end of the potentiometer RP3, a second fixed end of the potentiometer RP3 is respectively connected with an anode of the electrolytic capacitor C6 and a cathode of the thyristor VS1, the other end of a normally closed contact J2-1-4 of the relay J2-1 is respectively connected with a cathode of the diode D2, one end of the relay J2-1, a first fixed end of the potentiometer RP4, a sliding end of the potentiometer RP4, one end of the resistor R13, a cathode of the diode D3 and one end of the relay J3-1, a base electrode of the triode BG4 is connected with a collector electrode of the triode BG3, a collector electrode of the triode BG4 is respectively connected with an anode of the diode D4 and the other end of the relay J4-1, a base electrode of the triode BG4 is respectively connected with a second fixed end of the potentiometer RP4, one end of the button SB 4, an anode of the electrolytic capacitor C4, and the other end of the, A base electrode of the triode BG6, a collector electrode of the triode BG6 is respectively connected with an anode of a diode D3, the other end of a relay J3-1, a pin 3 of the pyroelectric infrared sensor IC3-1, an emitter electrode of the triode BG2, the other end of a resistor R12, a cathode of an electrolytic capacitor C6, an emitter electrode of the triode BG3, an emitter electrode of the triode BG4, the other end of a button SB1, a cathode of an electrolytic capacitor C7, an emitter electrode of the triode BG5 and an emitter electrode of the triode BG6 are all grounded;

the port 1 of the alarm switch S1 is suspended, the fixed end of the alarm switch S1 is connected with one end of a relay J4, the other end of a normally open contact J1-1 of the relay J1 is connected with a normally open contact J4-1 of a relay J4 in series and then connected with one end of a relay J5 after being connected with a normally open contact J8-1 of a relay J8 in series, the other end of a normally open contact J4-2 of a relay J4 is connected with a normally open contact J7-1 of a relay J7 in series and then connected with one end of an electromagnet KT1 and one end of a relay J6 respectively, the normally open contact J6-1 of the relay J6 is connected with two ends of a normally open contact J7-1 of a relay J7 in parallel, the other end of a normally open contact J7-1-1 of the relay J7-1 is connected with one end of the relay J7, the other end of the normally closed contact J7-1 of, The other end of the relay J5, the other end of the relay J6, the other end of the electromagnet KT1, the other end of the relay J7 and the other end of the relay J8 are all grounded;

one end of a normally open contact J5-1 of a relay J5 is connected with a live wire L, the other end of the normally open contact J5-1 of a relay J5 is respectively connected with a dialing circuit, one end of a normally open contact J1-2 of a relay J1 and one end of a normally open contact J2-1-3 of a relay J2-1, the other end of the normally open contact J1-2 of the relay J1 is connected with a photographing circuit on a gate, the other end of the normally open contact J2-1-3 of the relay J2-1 is connected with a photographing circuit corresponding to a room, and the normally open contact J6-2 of the relay J6 is connected with two ends of the normally open contact J5-1 of the relay J5 in parallel;

the positive electrode of the battery E is respectively connected with the positive electrode of an electrolytic capacitor C12 and one end of a doorbell switch K1, the other end of the doorbell switch K1 is respectively connected with one end of a resistor R24, one end of a resistor R25, one end of a resistor R26, the 8 pin of an 8-pin time base integrated circuit IC6, the 4 pin of the 8-pin time base integrated circuit IC6, the negative electrode of a diode D1 and one end of a relay J1, the 1 pin of a photocoupler IC5 is connected with the other end of a resistor R24, the 3 pin of the photocoupler IC5 is respectively connected with the other end of a resistor R25, the 2 pin of the 8-pin time base integrated circuit IC6, the collector of a triode BG18, the 3 pin of the 8-pin time base integrated circuit IC6 is connected with the base of a triode BG17, the collector of a triode BG17 is respectively connected with the positive electrode of a diode D1 and the other end of a relay J1, the 5 pin of the 8-pin time base integrated circuit IC6 is connected with one end of a, The photoelectric coupler comprises a pin 7 of an 8-pin time base integrated circuit IC6, a positive electrode of an electrolytic capacitor C13, one end of a piezoelectric plate XT1 is connected with a negative electrode of an electrolytic capacitor C15, the positive electrode of the electrolytic capacitor C15 is connected with a base electrode of a triode BG18, a negative electrode of a battery E, a negative electrode of an electrolytic capacitor C12, a pin 2 of a photoelectric coupler IC5, a pin 4 of the photoelectric coupler IC5, a negative electrode of an electrolytic capacitor C13, a pin 1 of the 8-pin time base integrated circuit IC6, the other end of a capacitor C14, an emitter of the triode BG17, an emitter of a triode BG18 and the other end of the piezoelectric plate XT1 are all grounded.

As a further improvement of the invention, the model number of the three-terminal voltage-stabilizing integrated circuit IC1 is 7805; the model of the voltage comparator IC2 is LM 339; the model of the pyroelectric infrared sensor IC3-1 is RE 200B; the model of the photoelectric coupler IC4-1 is H21A 1; the model number of the photoelectric coupler IC5 is H21A 1; the model number of the 8-pin time base integrated circuit IC6 is NE 555.

As a further improvement of the invention, the triode BG1 is a PNP pipe type 9012, and the triodes BG 2-BG 6 and BG 17-BG 18 are NPN pipe types 9014.

As a further improvement of the invention, the diodes D1-D3 are IN 4007.

As a further improvement of the invention, the triac SCR is model BT 136.

As a further improvement of the invention, the thyristor VS1 is of the type MCR 100-6.

As a further improvement of the invention, the relay J1, the relay J2-1, the relay J3-1, the relay J4, the relay J5, the relay J6, the relay J7 and the relay J8 are all direct current relays, and the models of the relays are JRX-20F.

As a further improvement of the invention, the photoresistor Rs1 is negative and has the model number of MG 45; the voltage of the battery E is 9V.

Compared with the prior art, the alarm switch S1 is arranged at a position which is convenient to operate and behind a large door, when the last person leaves the house, the alarm switch S1 can be dialed to the port 2 from the port 1, at the moment, the relay J4 is electrified and sucked, the normally open contact J4-1 of the relay J4, the normally open contact J4-2 of the relay J4, the normally open contact J4-3 of the relay J4 and the normally open contact J4-4 of the relay J4 are all closed, and the alarm system is in a standby preparation state; when a person presses a doorbell switch K1, a photoelectric coupler IC5 is conducted, or when the person knocks the door, a piezoelectric piece XT1 converts a vibration signal into an electric signal, a triode BG18 is conducted, a relay J1 is electrified and attracted, a normally open contact J1-1 of a relay J1 is closed, if no person is at home at the moment, a relay J5 is electrified and attracted, a normally open contact J5-1 of a relay J5 is closed, a dialing circuit is connected, a short message is sent to an owner, and a camera circuit arranged on the door can take a picture at the same time, so that whether the person is at home is judged by whether the lamp is on at night or not, after the person is dark every day, the bulb L1 of the invention can be automatically lightened, the light is automatically turned off after preset bedtime, the condition that the person is at home is simulated, and the thief who is not really afraid of acting; if on the premise that the alarm switch S1 is opened, as long as one pyroelectric infrared sensor IC3-1 in a monitored room detects a signal, the fact that a stranger breaks through the house is indicated, at the moment, the relay J6 is powered on to attract, the normally open contact J6-1 of the relay J6 is closed and self-locked, at the moment, the electromagnet KT1 arranged on the gate attracts, the gate cannot be opened, meanwhile, the dialing circuit is connected, a short message is sent to an owner, and the camera circuit arranged in the room at the corresponding position can take a picture; when the master returns and opens the door by using the key, the alarm switch S1 is shifted from the port 2 to the port 1, and the whole circuit stops working; when no person is at home, the invention can simulate the situation that someone is at home, so that the thief is dared not to move delicately, and when the thief breaks into the house, the dial circuit can be connected to inform the owner that the thief enters the house and take a picture of the thief.

Drawings

FIG. 1 is a schematic diagram of the circuit for detecting the presence of a person in a home and automatically turning on the light at night;

FIG. 2 is a schematic diagram of the circuitry for knock and doorbell detection of the present invention;

fig. 3 is a schematic diagram of the present invention for connecting a dialing circuit and a photographing circuit.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in figures 1-3, an embodiment of a household burglar alarm circuit is provided, wherein monitoring of 3 rooms is involved, the household burglar alarm circuit comprises a doorbell switch K1 installed on a gate, an electromagnet KT1, a pyroelectric infrared sensor IC3-1 installed in the monitored room No. 1, a pyroelectric infrared sensor IC3-2 installed in the monitored room No. 2, and a pyroelectric infrared sensor IC3-3 installed in the monitored room No. 3, and the alarm circuit further comprises a three-terminal voltage-stabilizing integrated circuit IC1, a voltage comparator IC2, a photocoupler IC4-1, a photocoupler IC4-2, a photocoupler IC4-3, a photocoupler IC5, an 8-pin time base integrated circuit IC6, resistors R1-R5, resistors R14-R18, resistors R19-R23, resistors R24-R26, electrolytic capacitors C1-C7, electrolytic capacitors C53-C9 and resistors R59869, Electrolytic capacitors C10-C11, electrolytic capacitors C12-C13, a capacitor C14, an electrolytic capacitor C15, diodes D1-D3, diodes D4-D7, triodes BG 1-BG 6, triodes BG 6-BG 6, a zener diode DW 6, potentiometers RP 6-RP 6, thyristors VS 6-VS 6, a piezoelectric sheet XT 6, a photoresistor Rs 6, a bulb L6, a bidirectional thyristor SCR, a normally open alarm switch S6, a transformer B6, a rectifier pile UR, a battery E, buttons SB 6-SB 6, a normally open contact J6-1 of the relay J6, a normally open contact J6-2 of the relay J6-6, a normally open contact J6-1 of the relay J6, a normally open contact J6-6 of the relay J6-6, and a normally open contact of the relay J6-6, Normally closed contact J2-1-4 of relay J2-1, relay J2-2, normally open contact J2-2-1 of relay J2-2, normally closed contact J2-2-2 of relay J2-2, normally open contact J2-2-3 of relay J2-2, normally closed contact J2-2-4 of relay J2-2, relay J2-3, normally open contact J2-3-1 of relay J2-3, normally closed contact J2-3-2 of relay J2-3, normally open contact J2-3-3 of relay J2-3, normally closed contact J2-3-4 of relay J2-3, relay J3-1, normally closed contact J3-1-1 of relay J3-1, normally closed contact J3-1-1 of relay J3-3, The relay J3-2, the normally closed contact J3-2-1 of the relay J3-2, the relay J3-3, the normally closed contact J3-3-1 of the relay J3-3, the relay J4, the normally open contact J4-1 of the relay J4, the normally open contact J4-2 of the relay J4, the normally open contact J4-3 of the relay J4, the normally open contact J4-4 of the relay J4, the relay J5, the normally open contact J5-1 of the relay J5, the relay J6, the normally open contact J6-1 of the relay J6, the normally open contact J6-2 of the relay J6, the relay J7, the normally open contact J7-1 of the relay J7, the relay J8, the normally open contact J8-1 of the relay J8, the normally open contact J8-2 of the relay J8, and the voltage stabilizing integrated circuit IC1 with the model number of three ends being 7805; the model of the voltage comparator IC2 is LM 339; the model of the pyroelectric infrared sensor IC3-1, IC3-2 and IC3-3 is RE 200B; the models of the photoelectric couplers IC4-1, IC4-2 and IC4-3 are H21A 1; the model number of the photoelectric coupler IC5 is H21A 1; the model of the 8-pin time base integrated circuit IC6 is NE 555; the triode BG1 is a PNP pipe type with a model number of 9012, the triodes BG 2-BG 6, the triodes BG 7-BG 11, the triodes BG 12-BG 16 and the triodes BG 17-BG 18 are NPN pipe types with a model number of 9014; the types of the diodes D1-D7 are IN 4007; the model of the bidirectional thyristor SCR is BT 136; the model numbers of the thyristors VS1, VS2 and VS3 are MCR 100-6; the relay J1, the relay J2-1, the relay J2-2, the relay J2-3, the relay J3-1, the relay J3-2, the relay J3-3, the relay J4, the relay J5, the relay J6, the relay J7 and the relay J8 are all direct current relays, and the types of the relays are JRX-20F; the photoresistor Rs1 is negative in polarity and is MG45 in model number; the voltage of the battery E is 9V;

the control circuit of the pyroelectric infrared sensor IC3-1 installed in the monitored room No. 1, the other end of a normally open contact J4-4 of a relay J4 is respectively connected with a pin 1 of the pyroelectric infrared sensor IC3-1, one end of a normally closed contact J3-1-1 of the relay J3-1, one end of a resistor R11, one end of a normally closed contact J2-1-4 of the relay J2-1 and the anode of a thyristor VS1, the base of a triode BG2 is connected after a 2-pin series resistor R10 of the pyroelectric infrared sensor IC3-1, the collector of the triode BG2 is connected with a pin 2 of a photocoupler IC4-1, the pin 1 of the photocoupler IC4-1 is connected with the other end of a normally closed contact J3-1-1 of the relay J3-1 after a pin series resistor R9, the pin 3 of the photocoupler IC4-1 is connected with the other end of a resistor R11, the 4 feet of a photoelectric coupler IC4-1 are respectively connected with one end of a resistor R12 and a control electrode of a thyristor VS1, the base of a triode BG3 is connected with a first fixed end of a potentiometer RP3 and a sliding end of a potentiometer RP3, the second fixed end of a potentiometer RP3 is respectively connected with the anode of an electrolytic capacitor C6 and the cathode of a thyristor VS1, the other end of a normally closed contact J2-1-4 of a relay J2-1 is respectively connected with the cathode of a diode D2, one end of a relay J2-1, the first fixed end of a potentiometer RP4, the sliding end of a potentiometer RP4, one end of a resistor R13, the cathode of a diode D3 and one end of a relay J3-1, the base of a triode BG4 is connected with the collector of a triode BG3, the collector of the triode BG4 is respectively connected with the anode of a diode D2 and the other end of a relay J2-1, and the base of a triode BG5 is respectively connected with the second fixed end, One end of a button SB1, the anode of an electrolytic capacitor C7, the collector of a triode BG5 is respectively connected with the other end of a resistor R13 and the base of a triode BG6, the collector of a triode BG6 is respectively connected with the anode of a diode D3 and the other end of a relay J3-1, the 3 pin of a pyroelectric infrared sensor IC3-1, the emitter of a triode BG2, the other end of the resistor R12, the cathode of an electrolytic capacitor C6, the emitter of the triode BG3, the emitter of a triode BG4, the other end of the button SB1, the cathode of an electrolytic capacitor C7, the emitter of a triode BG5 and the emitter of the triode BG6 are all grounded;

the positive electrode of the battery E is respectively connected with the positive electrode of an electrolytic capacitor C12 and one end of a doorbell switch K1, the other end of the doorbell switch K1 is respectively connected with one end of a resistor R24, one end of a resistor R25, one end of a resistor R26, the 8 pin of an 8-pin time base integrated circuit IC6, the 4 pin of the 8-pin time base integrated circuit IC6, the negative electrode of a diode D1 and one end of a relay J1, the 1 pin of a photocoupler IC5 is connected with the other end of a resistor R24, the 3 pin of the photocoupler IC5 is respectively connected with the other end of a resistor R25, the 2 pin of the 8-pin time base integrated circuit IC6, the collector of a triode BG18, the 3 pin of the 8-pin time base integrated circuit IC6 is connected with the base of a triode BG17, the collector of a triode BG17 is respectively connected with the positive electrode of a diode D1 and the other end of a relay J1, the 5 pin of the 8-pin time base integrated circuit IC6 is connected with one end of a, A pin 7 of an 8-pin time base integrated circuit IC6, a positive electrode of an electrolytic capacitor C13, one end of a piezoelectric plate XT1 is connected with a negative electrode of an electrolytic capacitor C15, the positive electrode of the electrolytic capacitor C15 is connected with a base electrode of a triode BG18, a negative electrode of a battery E, a negative electrode of an electrolytic capacitor C12, a pin 2 of a photoelectric coupler IC5, a pin 4 of the photoelectric coupler IC5, a negative electrode of an electrolytic capacitor C13, a pin 1 of the 8-pin time base integrated circuit IC6, the other end of a capacitor C14, an emitter electrode of the triode BG17, an emitter electrode of a triode BG18 and the other end of the piezoelectric plate XT1 are all grounded;

the control circuit of the pyroelectric infrared sensor IC3-2 installed in the monitored room No. 2, the other end of a normally open contact J4-4 of a relay J4 is respectively connected with a pin 1 of the pyroelectric infrared sensor IC3-2, one end of a normally closed contact J3-2-1 of the relay J3-2, one end of a resistor R16, one end of a normally closed contact J2-2-4 of the relay J2-2 and the anode of a thyristor VS2, the base of a triode BG7 is connected after a 2-pin series resistor R15 of the pyroelectric infrared sensor IC3-2, the collector of the triode BG7 is connected with a pin 2 of a photoelectric coupler IC4-2, the pin 1 of the photoelectric coupler IC4-2 is connected with the other end of a normally closed contact J3-2-1 of the relay J3-2 after a resistor R14, the pin 3 of the photoelectric coupler IC4-2 is connected with the other end of the resistor R16, the 4 feet of a photoelectric coupler IC4-2 are respectively connected with one end of a resistor R17 and a control electrode of a thyristor VS2, the base of a triode BG8 is connected with a first fixed end of a potentiometer RP5 and a sliding end of a potentiometer RP5, the second fixed end of a potentiometer RP5 is respectively connected with the anode of an electrolytic capacitor C8 and the cathode of a thyristor VS2, the other end of a normally closed contact J2-2-4 of a relay J2-2 is respectively connected with the cathode of a diode D4, one end of a relay J2-2, the first fixed end of a potentiometer RP6, the sliding end of a potentiometer RP6, one end of a resistor R18, the cathode of a diode D5 and one end of a relay J3-2, the base of a triode BG9 is connected with the collector of a triode BG8, the collector of the triode BG9 is respectively connected with the anode of a diode D4 and the other end of a relay J2-2, and the base of a triode BG10 is respectively connected with the second fixed end, One end of a button SB2, the anode of an electrolytic capacitor C9, the collector of a triode BG10 is respectively connected with the other end of a resistor R18 and the base of a triode BG11, the collector of a triode BG11 is respectively connected with the anode of a diode D5 and the other end of a relay J3-2, the 3 pin of a pyroelectric infrared sensor IC3-2, the emitter of a triode BG7, the other end of the resistor R17, the cathode of an electrolytic capacitor C8, the emitter of the triode BG8, the emitter of a triode BG9, the other end of the button SB2, the cathode of an electrolytic capacitor C9, the emitter of a triode BG10 and the emitter of the triode BG11 are all grounded;

the control circuit of the pyroelectric infrared sensor IC3-3 installed in the monitored room No. 3, the other end of a normally open contact J4-4 of a relay J4 is respectively connected with a pin 1 of the pyroelectric infrared sensor IC3-3, one end of a normally closed contact J3-3-1 of the relay J3-3, one end of a resistor R21, one end of a normally closed contact J2-3-4 of the relay J2-3 and the anode of a thyristor VS3, the base of a triode BG12 is connected after a 2-pin series resistor R20 of the pyroelectric infrared sensor IC3-3, the collector of the triode BG12 is connected with a pin 2 of a photocoupler IC4-3, the pin 1 of the photocoupler IC4-3 is connected with the other end of a normally closed contact J3-3-1 of the relay J3-3 after a pin series resistor R19, the pin 3 of the photocoupler IC4-3 is connected with the other end of a resistor R21, the 4 feet of the photocoupler IC4-3 are respectively connected with one end of a resistor R22 and a control electrode of a thyristor VS3, the base of the triode BG13 is connected with a first fixed end of a potentiometer RP7 and a sliding end of the potentiometer RP7, the second fixed end of the potentiometer RP7 is respectively connected with the anode of an electrolytic capacitor C10 and the cathode of the thyristor VS3, the other end of a normally closed contact J2-3-4 of a relay J2-3 is respectively connected with the cathode of a diode D6, one end of a relay J2-3, the first fixed end of a potentiometer RP8, the sliding end of a potentiometer RP8, one end of a resistor R23, the cathode of a diode D7 and one end of a relay J3-3, the base of the triode BG14 is connected with the collector of the triode BG13, the collector of the triode BG14 is respectively connected with the anode of a diode D6 and the other end of a relay J2-3, and the base of the triode BG15 is respectively connected with the second fixed end, One end of a button SB3, the anode of an electrolytic capacitor C11, the collector of a triode BG15 is respectively connected with the other end of a resistor R23 and the base of a triode BG16, the collector of a triode BG16 is respectively connected with the anode of a diode D7 and the other end of a relay J3-3, the 3 pin of a pyroelectric infrared sensor IC3-3, the emitter of a triode BG12, the other end of the resistor R22, the cathode of an electrolytic capacitor C10, the emitter of the triode BG13, the emitter of a triode BG14, the other end of the button SB3, the cathode of an electrolytic capacitor C11, the emitter of a triode BG15 and the emitter of the triode BG16 are all grounded;

the resistances of these elements in fig. 1-3 are conventional and can be adjusted as desired by one skilled in the art.

The working principle is as follows:

when the last person leaves the home, the alarm switch S1 can be switched from the port 1 to the port 2, the relay J4 is electrified and pulled in, the normally open contact J4-1 of the relay J4, the normally open contact J4-2 of the relay J4, the normally open contact J4-3 of the relay J4 and the normally open contact J4-4 of the relay J4 are closed, and the alarm system is in a standby preparation state;

detection of the presence or absence of a person at home:

in order to prevent false alarm when the alarm switch S1 is just switched on, taking the monitored room No. 1 as an example, when the alarm switch S1 is just switched on, because the voltage at two ends of the electrolytic capacitor C7 is zero and cannot suddenly change, the triode BG5 is cut off, the triode BG6 is switched on, the relay J3-1 is powered on and pulled off, the normally closed contact J3-1-1 of the relay J3-1 is switched off, the infrared detection circuit does not work, the voltage at two ends of the electrolytic capacitor C7 gradually rises, when the voltage value is higher than the base threshold value of the triode BG5, the triode BG6 is switched on, the relay J3-1 is powered off, the normally closed contact J3-1-1 of the relay J3-1 is closed, and the infrared detection circuit is in a standby state; at the moment, if no one is at home, the pin 2 of the pyroelectric infrared sensor IC3-1 outputs low level, the triode BG2 is cut off, the photoelectric coupler IC4-1 is cut off, the control electrode of the thyristor VS1 is cut off due to low level, the Darlington tube composed of the triode BG3 and the triode BG4 is cut off, and the relay J2-1 loses power; if a person is in the detection range of the pyroelectric infrared sensor IC3-1, pin 2 of the pyroelectric infrared sensor IC3-1 outputs high level, the triode BG2 is conducted, the photoelectric coupler IC4-1 is conducted, the control electrode of the thyristor VS1 is conducted with positive voltage, the Darlington tube composed of the triode BG3 and the triode BG4 is conducted, the relay J2-1 is electrified and attracted, the normally closed contact J2-1-4 of the relay J2-1 is disconnected, the thyristor VS1 is cut off, but the voltage on the electrolytic capacitor C6 will not disappear immediately, the Darlington tube composed of the triode BG3 and the triode BG4 is conducted continuously, after a period of time, the voltage on the electrolytic capacitor C6 gradually drops, the Darlington tube composed of the triode BG3 and the triode BG4 is cut off, the relay J2-1 loses power, the circuit enters a standby state, the next detection is waited, and meanwhile the effect of saving electric energy is achieved.

In order to prevent false alarm when the alarm switch S1 is just switched on, taking the monitored room No. 2 as an example, when the alarm switch S1 is just switched on, because the voltage at two ends of the electrolytic capacitor C9 is zero and cannot suddenly change, the triode BG10 is cut off, the triode BG11 is switched on, the relay J3-2 is electrified and pulled on, the normally closed contact J3-2-1 of the relay J3-2 is switched off, the infrared detection circuit does not work, the voltage at two ends of the electrolytic capacitor C9 gradually rises, when the voltage value is higher than the base threshold value of the triode BG10, the triode BG11 is switched on, the relay J3-2 is de-electrified, the normally closed contact J3-2-1 of the relay J3-2 is closed, and the infrared detection circuit is in a standby state; at the moment, if no one is at home, the pin 2 of the pyroelectric infrared sensor IC3-2 outputs low level, the triode BG7 is cut off, the photoelectric coupler IC4-2 is cut off, the control electrode of the thyristor VS2 is cut off due to low level, the Darlington tube composed of the triode BG8 and the triode BG9 is cut off, and the relay J2-2 loses power; if a person is in the detection range of the pyroelectric infrared sensor IC3-2, pin 2 of the pyroelectric infrared sensor IC3-2 outputs high level, the triode BG7 is conducted, the photoelectric coupler IC4-2 is conducted, the control electrode of the thyristor VS2 is conducted with positive voltage, the Darlington tube composed of the triode BG8 and the triode BG9 is conducted, the relay J2-2 is electrified and attracted, the normally closed contact J2-2-4 of the relay J2-2 is disconnected, the thyristor VS2 is cut off, but the voltage on the electrolytic capacitor C8 will not disappear immediately, the Darlington tube composed of the triode BG8 and the triode BG9 is conducted continuously, after a period of time, the voltage on the electrolytic capacitor C8 gradually drops, the Darlington tube composed of the triode BG8 and the triode BG9 is cut off, the relay J2-2 loses power, the circuit enters a standby state, the next detection is waited, and meanwhile the effect of saving electric energy is achieved.

In order to prevent false alarm when the alarm switch S1 is just switched on, taking the monitored room No. 3 as an example, when the alarm switch S1 is just switched on, because the voltage at two ends of the electrolytic capacitor C11 is zero and cannot suddenly change, the triode BG15 is cut off, the triode BG16 is switched on, the relay J3-3 is powered on and pulled off, the normally closed contact J3-3-1 of the relay J3-3 is switched off, the infrared detection circuit does not work, the voltage at two ends of the electrolytic capacitor C11 gradually rises, when the voltage value is higher than the base threshold value of the triode BG15, the triode BG16 is switched on, the relay J3-3 is powered off, the normally closed contact J3-2-1 of the relay J3-2 is closed, and the infrared detection circuit is in a standby state; at the moment, if no one is at home, the pin 2 of the pyroelectric infrared sensor IC3-3 outputs low level, the triode BG12 is cut off, the photoelectric coupler IC4-3 is cut off, the control electrode of the thyristor VS3 is cut off due to low level, the Darlington tube composed of the triode BG13 and the triode BG14 is cut off, and the relay J2-3 loses power; if a person is in the detection range of the pyroelectric infrared sensor IC3-3, the pin 2 of the pyroelectric infrared sensor IC3-3 outputs high level, the triode BG12 is conducted, the photoelectric coupler IC4-3 is conducted, the control electrode of the thyristor VS3 is conducted with positive voltage, the Darlington tube composed of the triode BG13 and the triode BG14 is conducted, the relay J2-3 is electrified and attracted, the normally closed contact J2-3-4 of the relay J2-3 is disconnected, the thyristor VS3 is cut off, but the voltage on the electrolytic capacitor C10 will not disappear immediately, the Darlington tube composed of the triode BG13 and the triode BG14 is conducted continuously, after a period of time, the voltage on the electrolytic capacitor C10 gradually drops, the Darlington tube composed of the triode BG13 and the triode BG14 is cut off, the relay J2-3 loses power, the circuit enters a standby state, the next detection is waited, and meanwhile the effect of saving electric energy is achieved.

Knock and press doorbell detection circuitry:

when a person presses a doorbell switch K1, a photoelectric coupler IC5 is conducted, or when the person knocks the door, a piezoelectric piece XT1 converts a vibration signal into an electric signal, a triode BG18 is conducted, 2 feet of an 8-foot time base integrated circuit IC6 are at low levels, 3 feet of an 8-foot time base integrated circuit IC6 output at high levels, a relay J1 is electrified and attracted, a normally open contact J1-1 of the relay J1 is closed, after a period of time, 3 feet of an 8-foot time base integrated circuit IC6 output at low levels, the relay J1 is de-electrified, and the normally open contact J1-1 of the relay J1 is disconnected.

When someone presses the doorbell switch K1 or knocks the door, the relay J1 is electrified and attracted, the normally open contact J1-1 of the relay J1 is closed, if no one is at home at this time, the relay J2-1 loses power, the normally closed contact J2-1-2 of the relay J2-1, the normally closed contact J2-2-2 of the relay J2-2 and the normally closed contact J2-3-2 of the relay J2-3 are closed, the relay J8 is powered, the normally closed contact J8-1 of the relay J8 is closed, meanwhile, the alarm switch S1 is closed, the normally open contact J4-1 of the relay J4 is closed, the relay J5 is electrified to be attracted, the normally open contact J5-1 of the relay J5 is closed, the dialing circuit is switched on, the short message is sent to the owner, meanwhile, the normally open contact J1-2 of the relay J1 is closed, and a camera circuit arranged on the gate takes a picture.

Unmanned night automatic light-on control circuit at home:

when the last person leaves the house, the alarm switch S1 can be switched from the port 1 to the port 2, no person can be detected in the room, the relay J4 is powered on and closed, the normally open contact J4-3 of the relay J4 is closed, the normally open contact J8-2 of the relay J8 is closed, and the control circuit starts to work; in the daytime, the resistance value of the photoresistor Rs1 is small, the voltage of a pin 7 of an A1 comparison amplifier in the voltage comparator IC2 is smaller than the voltage of a pin 6, the pin 1 of the voltage comparator IC2 outputs a low level, the pin 1 of an A1 comparison amplifier in the voltage comparator IC2 is connected with the pin 5 of an A2 comparison amplifier, the voltage of the pin 5 of the A2 comparison amplifier is smaller than the voltage of a pin 4, the pin 2 of the voltage comparator IC2 outputs a low level, the pin 14 of the A3 comparison amplifier in the voltage comparator IC2 also outputs a low level, the pin 14 of the A3 comparison amplifier is connected with the pin 10 of the A4 comparison amplifier, the pin 11 of the A4 comparison amplifier is larger than the pin 10 voltage, the pin 13 of the voltage comparator IC2 outputs a high level, the triode BG1 is conducted, the gate of the bidirectional thyristor SCR is at a low level and is cut off, and the bulb L1 is not bright; after dark, the resistance value of the photoresistor Rs1 is increased, the voltage of the pin 7 of the A1 comparison amplifier is larger than the voltage of the pin 6, the pin 1 outputs high level, because the voltages at the two ends of the electrolytic capacitor C3, the electrolytic capacitor C4 and the electrolytic capacitor C5 cannot change suddenly, the pin 2 of the A2 comparison amplifier and the pin 14 of the A3 comparison amplifier continue to output low level, the pin 13 of the A4 comparison amplifier outputs high level, the triode BG1 is cut off, the gate of the bidirectional thyristor SCR is high level and is switched on, the bulb L1 is lightened, meanwhile, the high level output by the pin 1 of the A1 comparison amplifier charges the electrolytic capacitor C3, after a period of time, the voltage of the pin 5 of the A2 comparison amplifier is larger than the voltage of the pin 4, the pin 2 of the voltage comparator IC2 outputs high level, after a period of time, the pin 9 of the A3 comparison amplifier is larger than the pin 8 voltage, the pin 14 of the voltage comparator IC2 outputs high level, finally, after a period of time, the voltage of the pin 11 of the A4 comparison amplifier is smaller than the voltage of the pin 10, the pin 13 of the voltage comparator IC2 outputs low level, the SCR is cut off, and the bulb L1 is turned off, so that the simulation of the existence of people in the home is realized; the starting time of the bulb L1 lighting at night can be changed by adjusting the potentiometer RP1, and the length of the lighting time of the bulb L1 at night can be changed by adjusting the potentiometer RP 2.

The household intruder stranger alarm circuit comprises:

when the last person leaves the house, the alarm switch S1 can be dialed to the port 2 from the port 1, if only one room pyroelectric infrared sensor detects a signal, the situation that a stranger breaks into the house is indicated, at least one of the normally open contacts J2-1-1 of the relay J2-1, the normally open contact J2-2-1 of the relay J2-2, and the normally open contact J2-3-1 of the relay J2-3 is closed, the relay J7 is electrically attracted, the normally open contact J7-1 of the relay J7 is closed, the normally open contact J4-2 of the relay J4 is closed, the relay J6 is electrically attracted, the normally open contact J6-1 of the relay J6 is closed and self-locked, the electromagnet KT1 installed on the gate is attracted at the moment and the gate cannot be opened, the normally open contact J6-2 of the relay J6 is closed, the dialing is connected with a circuit, a short message is sent to an owner, meanwhile, a normally open contact J2-1-3 of a relay J2-1 is closed, a camera circuit installed in a room No. 1 can take a picture (second numbers in the relay J2-1, the relay J2-2 and the relay J2-3 represent room numbers, in the application, only 3 monitored rooms are drawn in the pictures 1-3, if the numbers are continuously increased, only the normally open contact of the relay J2-1 is set to be in a parallel connection relation, and the normally closed contact is set to be in a series connection relation, so if the number J2-2-3 is closed, the number 2 room is closed, and the rest can be done in the same way); when the master returns to open the door with the key, the alarm switch S1 is toggled from port "2" to port "1", and the entire circuit stops working.

The dialing circuit and the photographing circuit corresponding to each room are commonly used circuits for those skilled in the art, and are not described herein.

Claims

1. A household anti-theft alarm circuit comprises a doorbell switch K1, an electromagnet KT1 and a pyroelectric infrared sensor IC3-1 which is arranged in a monitored room, and is characterized by further comprising a three-terminal voltage-stabilizing integrated circuit IC1, a voltage comparator IC2, a photoelectric coupler IC4-1, a photoelectric coupler IC5, an 8-pin time-base integrated circuit IC6, resistors R1-R13, resistors R24-R26, electrolytic capacitors C1-C7, electrolytic capacitors C12-C13, a capacitor C14, an electrolytic capacitor C15, diodes D1-D3, triodes BG 1-BG 6, triodes BG 17-BG 18, a voltage-stabilizing diode DW1, potentiometers RP 1-RP 1, a thyristor VS1, a piezoelectric sheet 1, a normally-open resistor 1, a photosensitive L36Rs, a bidirectional thyristor rectifier transformer S1, an SCR B72, an SCR 1, a SCR 36XT stack 72, a battery SB 1-36J relay, a contact relay and a SB 1-36J relay, Normally open contact J1-2 of relay J1, normally open contact J2-1-1 of relay J2-1, normally closed contact J2-1-2 of relay J2-1, normally open contact J2-1-3 of relay J2-1, normally closed contact J2-1-4 of relay J2-1, relay J3-1, normally closed contact J3-1-1 of relay J3-1, relay J4, normally open contact J4-1 of relay J4, normally open contact J4-2 of relay J4, normally open contact J4-3 of relay J4, normally open contact J4-4 of relay J4, normally open contact J5 of relay J5, normally open contact J5-1 of relay J46 6, normally open contact J6-1 of relay J6, normally open contact J6-2 of relay J6, A relay J7, a normally open contact J7-1 of a relay J7, a relay J8, a normally open contact J8-1 of a relay J8, a normally open contact J8-2 of a relay J8,

2. The household anti-theft alarm circuit according to claim 1, wherein the three-terminal regulator IC1 is model 7805; the model of the voltage comparator IC2 is LM 339; the model of the pyroelectric infrared sensor IC3-1 is RE 200B; the model of the photoelectric coupler IC4-1 is H21A 1; the model number of the photoelectric coupler IC5 is H21A 1; the model number of the 8-pin time base integrated circuit IC6 is NE 555.

3. A household theft-proof alarm circuit according to claim 1 or 2, characterized in that the transistor BG1 is a PNP tube type 9012, the transistors BG 2-BG 6 and BG 17-BG 18 are NPN tubes type 9014.

4. A home anti-theft alarm circuit according to claim 3, wherein the diodes D1-D3 are IN 4007.

5. A domestic theft protection alarm circuit according to claim 3, wherein the triac SCR is of type BT 136.

6. A domestic burglar alarm arrangement according to claim 3, wherein the thyristor VS1 is of the type MCR 100-6.

7. A household theft-proof alarm circuit according to claim 3, characterized in that the relay J1, the relay J2-1, the relay J3-1, the relay J4, the relay J5, the relay J6, the relay J7 and the relay J8 are dc relays, and the type is JRX-20F.

8. A domestic theft protection alarm circuit according to claim 3, wherein the photoresistor Rs1 is of negative polarity type MG 45; the voltage of the battery E is 9V.