CN202111452U

CN202111452U - Electrical safety protection circuit

Info

Publication number: CN202111452U
Application number: CN2011202389571U
Authority: CN
Inventors: 傅哲龙
Original assignee: 黄冬来
Priority date: 2011-07-08
Filing date: 2011-07-08
Publication date: 2012-01-11
Anticipated expiration: 2021-07-08

Abstract

The utility model relates to the field of electronics, in particular to an electrical safety protection circuit, which comprises a phase voltage acquisition module, a current signal detection module, a singlechip control module, a breaker driving module and a carrier signal phase locking circuit, wherein a signal acquired by the phase voltage acquisition module is transmitted to a voltage comparison module; a signal acquired by the current signal detection module is transmitted to an A/D (Analog/Digital) data conversion module; output signals of the voltage comparison module and the A/D data conversion module are output to the breaker driving module and the carrier signal phase locking circuit under the control of the singlechip control module; and an output signal of the carrier signal phase locking circuit is transmitted to a carrier signal decoding circuit through a frequency selective amplifier circuit. When a power supply line has failures such as overload, short circuiting, over-voltage, under-voltage and the like, a control signal is sent out through a singlechip, and a carrier signal is transmitted to a carrier host for remote alarm, so that electrical safety can be effectively guaranteed.

Description

The electrical safety protection circuit

Technical field

The utility model relates to electronic applications, particularly be a kind of electrical safety protection circuit.

Background technology

Raising along with Chinese economic development and resident's modern life level; The big increase of power consumption; Excess load often takes place in its supply line; Electric wiring or equipment often transship, short circuit, overvoltage, fault such as under-voltage, and the electrical fire accident that causes also increases thereupon, and the country and people's the security of the lives and property has been caused severe impairment.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of electrical safety protection circuit is provided.

The utility model solves the technical scheme that its technical problem adopted: the electrical safety protection circuit; Comprise phase voltage acquisition module, current signal detection module, single chip control module, circuit breaker driver module and carrier signal phase lock circuitry; The signal of said phase voltage acquisition module collection transfers to voltage comparison module; The signal of current signal detection module collection transfers to the A/D data conversion module; The output signal of said voltage comparison module and A/D data conversion module exports circuit breaker driver module and carrier signal phase lock circuitry to through single chip control module control, and the output signal of said carrier signal phase lock circuitry sends to the carrier signal decoding circuit through the frequency selective amplifier circuit.

Said single chip control module and watchdog module bidirectional data communication.

Said phase voltage acquisition module is exported the output signal of the voltage transformer BT that connects after diode D1-D4 bridge rectifier, capacitor 3C1,3C2 filtering signal are handled by the AC220V loop, its output signal re-sends to 7805 voltage stabilizing integration module U4 and constitutes.

Said voltage comparison module comprises overvoltage comparison circuit and under voltage comparison circuit.

Said current signal detection module, is sent to diode D5, capacitor C 1, capacitor C2 rectification, filtering signal and handles after potentiometer W adjustment by the induced signal of current transformer L1.

Said carrier signal phase lock circuitry is made up of LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof.

Said frequency selective amplifier circuit is made up of elementary L1, electric capacity 2C2, the capacitor 2C3 of triode VT1, audio frequency transformer T, and sends data-signal through telephone wire to the carrier signal decoding circuit through secondary L2, the electric capacity 2C4 of audio frequency transformer T.

Said carrier signal decoding circuit is made up of the audio frequency transformer T1, LM567 ATD U2, triode VT2 and the LED that connect successively.

Through adopting above-mentioned technical scheme; The beneficial effect of the utility model is: this circuit has online measuring ability and carrier wave warning function; When overload, short circuit, overvoltage, fault such as under-voltage appear in supply line; Send control signal through single-chip microcomputer, to carrier wave main frame remote alarms, effectively ensure Electrical Safety through the carrier signal transmission.

Description of drawings

Fig. 1 is the frame assumption diagram of the utility model;

Fig. 2 is the circuit theory diagrams of the utility model.

Embodiment

Like Fig. 1, shown in Figure 2; The electrical safety protection circuit of the utility model; Comprise phase voltage acquisition module 1, current signal detection module 2, single chip control module 3, circuit breaker driver module 4 and carrier signal phase lock circuitry 6; The signal that said phase voltage acquisition module 1 is gathered transfers to voltage comparison module 11; The signal that current signal detection module 2 is gathered transfers to A/D data conversion module 21; The output signal of said voltage comparison module 11 and A/D data conversion module 21 exports circuit breaker driver module 4 and carrier signal phase lock circuitry 6 to through single chip control module 3 controls, and the output signal of said carrier signal phase lock circuitry 6 sends to carrier signal decoding circuit 8 through frequency selective amplifier circuit 7, said single chip control module 3 and watchdog module 5 bidirectional data communications.

Said current signal detection module 2, is sent to diode D5, capacitor C 1, capacitor C2 rectification, filtering signal and handles after potentiometer W adjustment by the induced signal of current transformer L1, when phase line is passed current transformer L1 and had electric current to pass through; The secondary two ends of current transformer L1 produce the ac induction voltage signal, and after potentiometer W adjustment, diode D5 is rectified into d. c. voltage signal; Be input to the 2nd pin of A/D data converter IC3, form datel circuit, when the current signal of current transformer L1 induction during greater than set point through the 5th, 6,7 pin of A/D data converter IC3 and single-chip microcomputer IC1 the 35th, 36,37 pin; Read the data-signal of A/D data converter IC3 through single-chip microcomputer IC1; Read signal with 10ms speed, through single-chip microcomputer IC1 internal processes comprehensive online read judgement after, by the 8th pin output high level signal of single-chip microcomputer IC1; Through resistance R 3 current limlitings; Make triode Q1 conducting, the relay J adhesive, its contact J-1 is by transferring normally closed point normal battle to; Promote circuit breaker shunt opening coil KM dropout separating brake, the safety of protection power consumption equipment and supply line; The multivibrator that another route LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof constitute is formed carrier signal phase lock circuitry 6; Its frequency of oscillation is by the parameter determining of electric capacity 2C1, resistance 2R1, and carrier frequency is adjusted in the 150-300KHZ scope.Elementary L1, electric capacity 2C2, capacitor 2C3 by triode VT1, audio frequency transformer T constitute frequency selective amplifier circuit 7; The 28th pin output high level signal by single-chip microcomputer IC1; Make LM567 tone decoder U1 obtain working power; LM567 tone decoder U1 starts working, and is coupled on local telephone network speaking wire or the AC network AC220V power line and is sent by secondary L2, the electric capacity 2C4 of audio frequency transformer T, sends data-signal to the carrier wave main frame.

Said carrier signal decoding circuit 8 is made up of the audio frequency transformer T1, LM567 ATD U2, triode VT2, the LED that connect successively; The time constant of resistance 1R1, electric capacity 1C5 network has determined the voltage controlled oscillator of LM567 ATD U2; When the carrier wave extension set when main frame sends 150-300KHZ carrier wave command signal; Be coupled to the secondary L3 of audio frequency transformer T through electric capacity 1C1, audio frequency transformer T1, its secondary L3, electric capacity 1C2, electric capacity 1C3 form a carrier wave frequency-selective network.Signal after the frequency-selecting is coupled to the 3rd pin signal input part of LM567 ATD U2 through electric capacity 1C4; After LM567 ATD U2 decoding,, make triode VT2 conducting by its 8th pin output output low level; LED is lighted; The carrier data signal of receiving extension set is described, the expression electric wiring breaks down, and should in time get rid of.

Said phase voltage acquisition module 1 is exported the output signal of the voltage transformer BT that connects after diode D1-D4 bridge rectifier, capacitor 3C1,3C2 filtering signal are handled by the AC220V loop; Its output signal re-sends to 7805 voltage stabilizing integration module U4 and constitutes; Constitute the phase voltage loop by L, N; Normal value is at the AC220V state; The secondary output AC voltage of voltage transformer BT is about 8V, and after diode D1-D4 bridge rectifier, electric capacity 3C1,3C2 filtering, this direct voltage divides two-way to be input to the 1st pin of 7805 voltage stabilizing integration module U4 respectively; Output 5V power supply service voltage comparator IC2 provides the reference comparison voltages value after its inner voltage stabilizing is handled, and another road is input to the in-phase end of voltage comparator ic 2 through potentiometer W2 adjustment.

When L, N formation phase voltage loop, magnitude of voltage is when AC280V, and BT level of voltage transformer output AC voltage is about 11V; After rectification output, potentiometer W2 adjustment, be input to the 3rd, 6 pin of voltage comparator ic 2, carry out voltage ratio, the 5th, 6,7 pin of voltage comparator ic 2 and peripheral cell composition overvoltage comparison circuit with the 2nd, 5 pin of voltage comparator ic 2; When its 6th pin voltage during greater than the 5th pin voltage reference value, voltage comparator ic 2 interior overturns are explained to be in the overvoltage phenomenon; Be input to single-chip microcomputer IC1 the 33rd pin by its 7th pin output high level through resistance 3R3 current limliting, after the control of single-chip microcomputer IC1 internal processes, by the 8th pin output high level signal of single-chip microcomputer IC1; Through resistance R 3 current limlitings, make triode Q1 conducting, the relay J adhesive; Its electric shock J-1 is by transferring normally closed point normal battle to; Promote circuit breaker KM dropout separating brake, the safety of protection power consumption equipment and supply line is explained and the overvoltage phenomenon is taken place and the dropout separating brake.The 28th pin output high level signal of another route single-chip microcomputer IC1; Make LM567 tone decoder U1 obtain working power; LM567 tone decoder U1 starts working; Be coupled on local telephone network speaking wire or the AC network AC220V power line and send by secondary L2, the electric capacity 2C4 of audio frequency transformer T, send data-signal to the carrier wave main frame.When the carrier wave extension set when main frame sends 150-300KHZ carrier wave command signal, be coupled to the secondary L3 of audio frequency transformer T through electric capacity 1C1, audio frequency transformer T1, its secondary L3, electric capacity 1C2, electric capacity 1C3 form a carrier wave frequency-selective network.Signal after the frequency-selecting is coupled to the 3rd pin signal input part of LM567 ATD U2 through electric capacity 1C4; After LM567 ATD U2 decoding,, make triode VT2 conducting by its 8th pin output output low level; LED is lighted; The carrier data signal of receiving extension set is described, the expression electric wiring breaks down, and should in time get rid of.

When L, N formation phase voltage loop, magnitude of voltage is when AC150V, and the secondary output AC voltage of voltage transformer BT is about 5V; After rectification output, potentiometer W2 adjustment, be input to the 3rd, 6 pin of voltage comparator ic 2, carry out voltage ratio, the 3rd, 2,1 pin of voltage comparator ic 2 and peripheral cell composition under voltage comparison circuit with the 2nd, 5 pin of voltage comparator ic 2; When its 2nd pin voltage during greater than the 3rd pin voltage reference value, the upset of voltage comparator ic 2 internal comparator explains that under-voltage phenomenon has appearred in line voltage; The 1st pin output high level by voltage comparator ic 2 is input to single-chip microcomputer IC1 the 32nd pin through resistance 3R2 current limliting, after the control of single-chip microcomputer IC1 internal processes, by single-chip microcomputer IC1 the 8th pin output high level signal; Through resistance R 3 current limlitings, make triode Q1 conducting, the relay J adhesive; Its contact J-1 promotes circuit breaker KM dropout separating brake, the safety of protection power consumption equipment and supply line by transferring normally closed point normal battle to; Explain under-voltage phenomenon takes place, and produce the output of dropout separating brake.The 28th pin output high level signal of another route single-chip microcomputer IC1; Make LM567 tone decoder U1 obtain working power; LM567 tone decoder U1 starts working; Be coupled on local telephone network speaking wire or the AC network AC220V power line and send by secondary L2, the electric capacity 2C4 of audio frequency transformer T, send data-signal to the carrier wave main frame.When the carrier wave extension set when main frame sends 150-300KHZ carrier wave command signal, be coupled to the secondary L3 of audio frequency transformer T through electric capacity 1C1, audio frequency transformer T1, its secondary L3, electric capacity 1C2, electric capacity 1C3 form a carrier wave frequency-selective network.Signal after the frequency-selecting is coupled to the 3rd pin signal input part of LM567 ATD U2 through electric capacity 1C4; After LM567 ATD U2 decoding,, make triode VT2 conducting by its 8th pin output output low level; LED is lighted; The carrier data signal of receiving extension set is described, the expression electric wiring breaks down, and should in time get rid of.When single-chip microcomputer IC1 detects its 32nd pin and is in low level state, when single-chip microcomputer IC1 internal processes set point, by single-chip microcomputer IC1 the 8th pin output low level signal; Triode Q1 is ended; Relay J discharges, and its electric shock J-1 transfers normal battle to by normally closed point, promotes circuit breaker KM and closes a floodgate; Combined floodgate restores electricity, and realizes automatically reseting controlled function.

An above-described preferred embodiment that is merely the utility model can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. electrical safety protection circuit; It is characterized in that: comprise phase voltage acquisition module (1), current signal detection module (2), single chip control module (3), circuit breaker driver module (4) and carrier signal phase lock circuitry (6); The signal that said phase voltage acquisition module (1) is gathered transfers to voltage comparison module (11); The signal that current signal detection module (2) is gathered transfers to A/D data conversion module (21); The output signal of said voltage comparison module (11) and A/D data conversion module (21) exports circuit breaker driver module (4) and carrier signal phase lock circuitry (6) to through single chip control module (3) control, and the output signal of said carrier signal phase lock circuitry (6) sends to carrier signal decoding circuit (8) through frequency selective amplifier circuit (7).

2. electrical safety protection circuit according to claim 1 is characterized in that: said single chip control module (3) and watchdog module (5) bidirectional data communication.

3. electrical safety protection circuit according to claim 1; It is characterized in that: said phase voltage acquisition module (1) is exported the output signal of the voltage transformer BT that connects after diode D1-D4 bridge rectifier, capacitor 3C1,3C2 filtering signal are handled by the AC220V loop, its output signal re-sends to 7805 voltage stabilizing integration module U4 and constitutes.

4. electrical safety protection circuit according to claim 1 is characterized in that: said voltage comparison module (11) comprises overvoltage comparison circuit and under voltage comparison circuit.

5. electrical safety protection circuit according to claim 1; It is characterized in that: said current signal detection module (2), is sent to diode D5, capacitor C 1, capacitor C2 rectification, filtering signal and handles after potentiometer W adjustment by the induced signal of current transformer L1.

6. electrical safety protection circuit according to claim 1 is characterized in that: said carrier signal phase lock circuitry (6) is made up of LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof.

7. electrical safety protection circuit according to claim 1; It is characterized in that: said frequency selective amplifier circuit (7) is made up of elementary L1, electric capacity 2C2, the capacitor 2C3 of triode VT1, audio frequency transformer T, and sends data-signal through telephone wire to carrier signal decoding circuit (8) through secondary L2, the electric capacity 2C4 of audio frequency transformer T.

8. according to claim 1 or 7 described electrical safety protection circuits, it is characterized in that: said carrier signal decoding circuit (8) is made up of the audio frequency transformer T1, LM567 ATD U2, triode VT2 and the LED that connect successively.