CN213182993U

CN213182993U - Human body induction large-audio anti-theft alarm circuit

Info

Publication number: CN213182993U
Application number: CN202022649448.XU
Authority: CN
Inventors: 何国华
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-05-11
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a big audio frequency burglar alarm circuit of human response, including voltage conversion circuit, rectification filter circuit, voltage stabilizing circuit, human response circuit, signal amplification processing circuit, controller circuit, loudspeaker warning circuit, voltage converter passes through transformer W and changes the magnitude of voltage, and human response circuit passes through microwave detection and again makes controller circuit work, the action of last loudspeaker warning circuit through signal amplification processing. The utility model discloses big audio frequency burglar alarm circuit of human response adopts simple electronic component to constitute, RD627 Doppler effect sensor detects the removal of people and object, effectively avoid the wrong report and miss the newspaper, improve the rate of accuracy of reporting to the police, the circuit has the steady voltage effect, better protection circuit avoids highly compressed injury, four stereo set analog integrated circuit KD-9561 can send the alarm sound of siren, the chip TWH875 of interpolation can be better make warning sound grow, and the circuit is simple and easy, and easy installation, high applicability, and is low in cost.

Description

Human body induction large-audio anti-theft alarm circuit

Technical Field

The utility model relates to an alarm field specifically is a big audio frequency burglar alarm circuit of human response.

Background

In recent years, along with the improvement of living standard, in order to protect personal safety and property safety of people, an alarm system is arranged at an exit of a user, at present, the types of anti-theft alarm devices on the market are more, but most of the anti-theft alarm devices have different defects, for example, the contact type alarm devices are easy to have false alarm due to the vibration of doors and windows, and the contact type switches are difficult to repair after being broken; infrared alarm is also prone to false alarm, and is not well recognized for non-human conditions, and the range is small, and many household alarm devices are complex in structure, expensive, difficult to install, and not well mastered in sensitivity.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a big audio burglar alarm circuit of human response to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a big audio frequency burglar alarm circuit of human response, includes voltage conversion circuit, rectifier filter circuit, voltage stabilizing circuit, human induction circuit, signal amplification processing circuit, controller circuit, loudspeaker warning circuit, voltage converter passes through transformer W and changes the voltage value, and rectifier filter circuit provides smooth DC voltage for the circuit, and voltage stabilizing circuit provides steady voltage, and human induction circuit makes the controller circuit work through signal amplification processing circuit again through the response human body of transmission microwave, further triggers loudspeaker warning circuit action.

As a further technical solution of the present invention: one end of a primary winding of the transformer W is connected with 220V alternating current through a fuse FU, the other end of the primary winding of the transformer W is connected with 220V alternating current through a starting switch S1, a secondary winding of the transformer W is connected with two input ports of a rectifier T, an output port 2 of the rectifier T is connected with the anode of a capacitor C1, a capacitor C2 and a pin 1 of a voltage stabilizer U1, a port 4 of the rectifier T is connected with the cathode of a capacitor C1, the grounding end, the other end of a capacitor C2, a pin 3 of a voltage stabilizer U1, the cathode of a capacitor C3, a pin 7 of a sensor U2, the emitter of a triode V1, the emitter of a triode V5, a capacitor C5, a capacitor C6, a pin 1 of a controller U3, a capacitor C7, the cathode of a diode D1, a pin 2 of a chip U4, a pin 3 of a chip U5, the emitter of a triode V3 and a horn B, a pin, pin 3 of sensor U2 is connected to pin 5 of sensor U2 through capacitor C2, pin 4 of sensor U2 is connected to the positive pole of capacitor C2, pin 2 of regulator U2, resistor R2,

4 and 8 of controller U2 and the collector of transistor V2, pin 6 of sensor U2 is connected to the positive pole of capacitor C2, the negative pole of capacitor C2 is connected to resistor R2 and the base of transistor V2, the collector of transistor V2 is connected to the other end of resistor R2, the positive pole of capacitor C2 and the other end of resistor R2, the negative pole of capacitor C2 is connected to pin 3 of operational amplifier a 2, pin 2 of operational amplifier a 2 is connected to pin 1 of operational amplifier a 2 and the base of transistor V2 through resistor R2, the collector of transistor V2 is connected to the other end of resistor R2 and pin 2 of controller U2, and the other end of controller U2 is connected to the resistor R2 and the other end of capacitor C2 and the resistor R2. Pin 5 of controller U3 is connected to the other end of capacitor C6, pin 3 of controller U3 is connected to resistor R5 and the other end of capacitor C7, the other end of resistor R5 is connected to the base of transistor V2, the collector of transistor V2 is connected to resistor R6, the VDD of chip U4,

pins

1 and 5 of chip U5, resistor R9 and the emitter of transistor V4, the other end of resistor R6 is connected to the anode of led D1, pin 6 of chip U4 is connected to pin 7 of chip U4 through resistor R7, pin 3 of chip U4 is connected to pin 2 of chip U4 through resistor R4, pin 4 of chip U4 is connected to the base of transistor V4, the collector of transistor V4 is connected to the other end of resistor R4 and the base of transistor V4, and the collector of transistor V4 is connected to the other end of horn B.

As a further technical solution of the present invention: the human body induction circuit is composed of a sensor U2 as a core, the signal processing and amplifying circuit is composed of an operational amplifier A1, a resistor R1, a resistor R2, a resistor R3, a capacitor C4, a resistor C8 and a triode V1, the controller is composed of a U3 and related elements on pins, and the horn alarm circuit is composed of a chip U4, a U5 and a horn B.

As a further technical solution of the present invention: the voltage stabilizer U1 is a three-terminal integrated voltage stabilizer with the model number of 7812.

As a further technical solution of the present invention: the sensor U2 is RD627 Doppler effect sensor.

As a further technical solution of the present invention: and the operational amplifier A1 selects a Ma741 high-gain integrated operational amplifier.

As a further technical solution of the present invention: the controller U3 adopts a 555 chip, the chip U4 adopts a four-sound analog integrated circuit KD-9561, and the chip U5 adopts TWH 8751.

As a further technical solution of the present invention: the capacitors C1, C3, C4 and C8 are polar capacitors.

As a further technical solution of the present invention: the transistors V1, V2, V5 and V3 are NPN transistors, and V4 is PNP transistors.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses big audio frequency burglar alarm circuit of human response adopts simple electronic component to constitute, adopt RD627 Doppler effect sensor can detect the removal of people and object, effectively avoid the wrong report and the missed report, improve the rate of accuracy of reporting to the police, the circuit has the steady voltage effect, better protection circuit avoids highly compressed injury, four stereo set analog integrated circuit KD-9561 can send the alarm sound of siren, the chip TWH875 of interpolation can be better make warning sound grow, and the circuit is simple and easy, simple to operate, high applicability, and is low in cost.

Drawings

Fig. 1 is a schematic diagram of the structural block of the present invention.

Fig. 2 is a circuit diagram of the present invention.

Fig. 3 is a schematic diagram of the internal structure of the RD627 doppler effect sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1, a human body induction type large audio anti-theft alarm circuit comprises a voltage conversion circuit, a rectification filter circuit, a voltage stabilizing circuit, a human body induction circuit, a signal amplification processing circuit, a controller circuit and a horn alarm circuit, wherein the voltage converter changes a voltage value through a transformer W, the rectification filter circuit provides smooth direct current voltage for the circuit, the voltage stabilizing circuit provides voltage stabilization, the human body induction circuit induces a human body through transmitting microwaves, the signal amplification processing circuit enables the controller circuit to work, and the horn alarm circuit is further triggered to act.

Example 2: on the basis of embodiment 1, please refer to fig. 2, one end of the primary winding of the transformer W is connected to 220V ac through the fuse FU, the other end of the primary winding of the transformer W is connected to 220V ac through the start switch S1, the secondary winding of the transformer W is connected to two input ports of the rectifier T, the output port 2 of the rectifier T is connected to the positive electrode of the capacitor C1, the capacitor C2 and the pin 1 of the regulator U1, the port 4 of the rectifier T is connected to the negative electrode of the capacitor C1, the ground terminal, the other end of the capacitor C2, the pin 3 of the regulator U1, the negative electrode of the capacitor C3, the pin 7 of the sensor U2, the emitter of the transistor V1, the emitter of the transistor V5, the capacitor C5, the capacitor C6, the pin 1 of the controller U3, the capacitor C7, the cathode of the diode D1, the pin 2 of the chip U4, the pin 3 of the chip U5, the emitter of the transistor V3 and the horn B, the pin, pin 3 of sensor U2 is connected to pin 5 of sensor U2 through capacitor C2, pin 4 of sensor U2 is connected to the positive pole of capacitor C2, pin 2 of regulator U2, resistor R2,

pins

The utility model discloses a theory of operation is: when a starting switch S2 is pressed, 220V alternating current is rectified, filtered and stabilized into 12V smooth direct current, when RD627 detects an object through a microwave signal emitted by an antenna, the microwave signal is processed by RD627 to output a pulsating voltage signal which is proportional to the distance between the object and the antenna from 6 pins of the microwave signal, and after the processing and amplification, a triode V5 is conducted, 2 pins of NE555 are pulled down, 3 pins of NE555 output high level, a triode V2 is conducted, a light-emitting diode D1 is lightened, and a siren sound emitted by a horn B is louder through TWH 8751.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A large-audio anti-theft alarm circuit induced by a human body comprises a voltage conversion circuit, a rectifying filter circuit, a voltage stabilizing circuit, a human body induction circuit, a signal amplification processing circuit, a controller circuit and a horn alarm circuit and is characterized in that the voltage conversion circuit comprises a transformer, one end of a primary winding of the transformer W is connected with 220V alternating current through a fuse FU, the other end of the primary winding of the transformer W is connected with 220V alternating current through a starting switch S1, a secondary winding of the transformer W is connected with two input ports of a rectifier T, an output port 2 of the rectifier T is connected with a positive electrode of a capacitor C1, a capacitor C2 and a pin 1 of a voltage stabilizer U1, a port 4 of the rectifier T is connected with a negative electrode and a grounding end of a capacitor C1, the other end of a capacitor C2, a pin 3 of a voltage stabilizer U1, a negative electrode of a capacitor C3, a pin 7 of a, An emitter of the transistor V5, a capacitor C5, a pin 1 of the controller U5, a capacitor C5, a cathode of the diode D5, a pin 2 of the chip U5, a pin 3 of the chip U5, an emitter of the transistor V5, and a horn B, a pin 1 of the sensor U5 is connected to a pin 2 of the sensor U5 through an antenna Y, a pin 3 of the sensor U5 is connected to a pin 5 of the sensor U5 through the capacitor C5, a pin 4 of the sensor U5 is connected to an anode of the capacitor C5, a pin 2 of the regulator U5, a resistor R5, pins 4 and 8 of the controller U5, and a collector of the transistor V5, a pin 6 of the sensor U5 is connected to an anode of the capacitor C5, a cathode of the capacitor C5 is connected to a base of the resistor R5 and a base of the transistor V5, a collector of the transistor V5 is connected to the other end of the resistor R5, a negative electrode of the resistor R5, and a negative electrode of the capacitor C36, a pin 2 of the operational amplifier A is connected with a pin 1 of the operational amplifier A and a base electrode of a triode V through a resistor R, a collector electrode of the triode V is connected with the other end of the resistor R and the pin 2 of a controller U, a pin 6 of the controller U is connected with a pin 7 of the controller U, the other end of the resistor R and the other end of a capacitor C, a pin 5 of the controller U is connected with the other end of the capacitor C, a pin 3 of the controller U is connected with the other ends of the resistor R and the capacitor C, the other end of the resistor R is connected with the base electrode of the triode V, the collector electrode of the triode V is connected with the resistor R, a VDD end of a chip U, pins 1 and 5 of the chip U, the resistor R and an emitter electrode of the triode V, the other end of the resistor R is connected with an anode of a light-emitting diode D, the pin 6 of the chip U is connected with the pin 7 of the chip U through the resistor, the collector of the triode V3 is connected with the other end of the resistor R9 and the base of the triode V4, and the collector of the triode V4 is connected with the other end of the horn B.

2. The human body induction large audio anti-theft alarm circuit according to claim 1, wherein the rectifier T and the capacitor C1 form a rectifying and filtering circuit, the voltage stabilizing circuit comprises a voltage stabilizer U1 and capacitors C2 and C3, the human body induction circuit comprises a sensor U2 as a core, the signal processing and amplifying circuit comprises an operational amplifier A1, a resistor R1, R2, R3, capacitors C4 and C8 and a triode V1, the controller comprises a U3 and related elements on pins, and the horn alarm circuit comprises chips U4, U5 and a horn B.

3. The human body induction large audio frequency anti-theft alarm circuit according to claim 2, characterized in that the voltage stabilizer U1 is a three-terminal integrated voltage stabilizer with type 7812.

4. The human body induction large audio burglar alarm circuit according to claim 1, wherein said sensor U2 is selected from RD627 doppler effect sensor.

5. The human body induction large audio frequency anti-theft alarm circuit according to claim 1, wherein the operational amplifier a1 is a Ma741 high gain integrated operational amplifier.

6. The human body induction large audio frequency anti-theft alarm circuit according to claim 1, characterized in that the controller U3 is 555 chip, the chip U4 is four sound analog integrated circuit KD-9561, and the chip U5 is TWH 8751.

7. The human body induction large audio burglar alarm circuit according to claim 1, wherein said capacitors C1, C3, C4 and C8 are all polar capacitors.

8. The human body induction large audio burglar alarm circuit according to claim 1, characterized in that said transistors V1, V2, V5 and V3 are NPN transistors, and V4 is a PNP transistor.