CN202600036U

CN202600036U - Overcurrent carrier alarm device

Info

Publication number: CN202600036U
Application number: CN 201220292521
Authority: CN
Inventors: 傅小红; 王志坚
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-20
Filing date: 2012-06-20
Publication date: 2012-12-12
Anticipated expiration: 2022-06-20

Abstract

The utility model relates to an overcurrent carrier alarm device, comprising an overcurrent detection circuit, a single chip control circuit, a drive power-off circuit and a carrier signal phase locking circuit, wherein an output signal of the overcurrent detection circuit is transmitted to the single chip control circuit via a trigger delay circuit, an output signal of the single chip control circuit is controlled to be sent to the drive power-off circuit and the carrier signal phase locking circuit, and an output signal of the carrier signal phase locking circuit is sent to a carrier signal decoding circuit via a frequency-selective amplifier circuit; and when a load is subjected to overcurrent, a load power supply is cut off after a single chip makes judgment, alarm information is sent to a carrier host via a carrier signal transmission circuit, and professionals are in charge of handling faults, thereby avoiding electrical fire caused by the overcurrent, and guaranteeing the life and property safety of people.

Description

A kind of overcurrent carrier wave warning device

Technical field

The utility model relates to a kind of warning device, particularly be a kind of overcurrent carrier wave warning device.

Background technology

Excess current is commonly called as overload and claims overload again; Improving constantly of Along with people's living standard, power consumption increases thereupon, because the building's electrical design of the eighties requires to differ bigger with modern life electricity consumption; Bring the phenomenon of excess current generally to take place for electricity consumption supply line; The scheme that solves has only original supply line of replacing, but because people's consciousness is comparatively weak, causes the electrical fire that causes because of excess current still to happen occasionally.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of overcurrent carrier wave warning device is provided.

The utility model solves the technical scheme that its technical matters adopted: a kind of overcurrent carrier wave warning device; Comprise overcurrent sensing circuit, single chip machine controlling circuit, driving power-down circuit and carrier signal phase lock circuitry; The output signal of said overcurrent sensing circuit transfers to single chip machine controlling circuit through triggering delay circuit; The output signal controlling of said single chip machine controlling circuit is sent to and drives power-down circuit and carrier signal phase lock circuitry, and the output signal of said carrier signal phase lock circuitry sends to the carrier signal decoding scheme through the frequency-selecting amplifier circuit.

Said single chip machine controlling circuit and watchdog circuit bidirectional data communication.

Said overcurrent sensing circuit is made up of diode VD2, capacitor C3, resistance R 1, the potentiometer RP that current transformer TA and output terminal thereof connect; Wherein behind the diode VD2 shnt capacitor C3; Parallelly connected with the series circuit of resistance R 1, potentiometer RP again; The winding of said current transformer TA is serially connected in the end of incoming cables of electricity consumption power lead, and its secondary induction current is directly proportional with home-use electric weight.

Said triggering delay circuit adopts 555 monostable circuit IC.

Said carrier signal phase lock circuitry is made up of LM567 tone decoder IC1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof.

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

Said carrier signal decoding scheme is made up of the audio-frequency transformer (AFT) T1, LM567 ATD IC2, triode VT2 and the LED that connect successively.

Through adopting above-mentioned technical scheme; The beneficial effect of the utility model is: when load over-current, after single-chip microcomputer is judged, cut off load power source, simultaneously through the carrier signal transmission circuit; Send warning message to the carrier wave main frame;, avoid Fault Processing by the professional, ensure people's the security of the lives and property because of excess current causes electrical fire.

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; A kind of overcurrent carrier wave warning device of the utility model; Comprise overcurrent sensing circuit 1, single chip machine controlling circuit 2, drive power-down circuit 21 and carrier signal phase lock circuitry 22; The output signal of said overcurrent sensing circuit 1 transfers to single chip machine controlling circuit 2 through triggering delay circuit 11; The output signal controlling of said single chip machine controlling circuit 2 is sent to and drives power-down circuit 21 and carrier signal phase lock circuitry 22, and the output signal of said carrier signal phase lock circuitry 22 sends to carrier signal decoding scheme 24 through frequency-selecting amplifier circuit 23.

Said single chip machine controlling circuit 2 and watchdog circuit 25 bidirectional data communications.

Said overcurrent sensing circuit 1 is made up of diode VD2, capacitor C3, resistance R 1, the potentiometer RP that current transformer TA and output terminal thereof connect; Wherein behind the diode VD2 shnt capacitor C3; Parallelly connected with the series circuit of resistance R 1, potentiometer RP again; The winding of said current transformer TA is serially connected in the end of incoming cables of electricity consumption power lead, and its secondary induction current is directly proportional with home-use electric weight.Said triggering delay circuit 11 adopts 555 monostable circuit IC, and the output terminal of potentiometer RP is connected to the 2nd pin of 555 monostable circuit IC successively through stabilivolt VS2, transistor VT.

Under the situation of not overload electricity consumption, because electric current in allowed limits, the sampling voltage of the secondary side of current transformer TA output is lower; The dividing potential drop deficiency that obtains through potentiometer RP is so that stabilivolt VS2 punctures, and transistor VT is in cut-off state, is electronegative potential output; This signal is input to the 22nd pin I/O end of single-chip microcomputer U1, after single-chip microcomputer U1 internal processor is judged through resistance R 5 current limlitings; Do not send control signal

When power load surpassed setting value, through the voltage rising of current transformer TA sampling, at this moment stabilivolt VS2 punctured; Transistor VT conducting, the collector output low level of transistor VT make the monostable circuit upset, the 3rd pin output high level of 555 monostable circuit IC; Be input to single-chip microcomputer U1 the 22nd pin I/O end and also be high level state, after single-chip microcomputer U1 internal processor is judged, send control signal; Divide two-way output, first via output constitutes carrier signal phase lock circuitry 22 by LM567 tone decoder IC1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof; Its oscillation frequency is by the parameter determining of electric capacity 2C1, resistance 2R1; Carrier frequency is adjusted in the 150-300KHZ scope, and said frequency-selecting amplifier circuit 23 is made up of elementary L1, electric capacity 2C2, the capacitor 2C3 of triode VT1, audio-frequency transformer (AFT) T, by single-chip microcomputer IC1 the 28th pin output high level signal; Make LM567 tone decoder IC1 obtain working power; LM567 tone decoder IC1 starts working, and is coupled on the AC network AC220V power lead and is sent by secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T, sends alerting signals to carrier signal decoding scheme 24.

Said carrier signal decoding scheme 24 is made up of the audio-frequency transformer (AFT) T1, LM567 ATD IC2, triode VT2 and the LED that connect successively; Carrier receiver is installed on sub-district property duty room, and the time constant of resistance 1R1, electric capacity 1C5 network has determined the voltage controlled oscillator of LM567 ATD IC2, when the carrier wave extension set when main frame sends 150-300KHZ carrier wave command signal; Be coupled to the L3 of T1 level of audio-frequency transformer (AFT) through LM567 tone decoder 1C1, audio-frequency transformer (AFT) T1; L3, electric capacity 1C2,1C3 form a carrier wave frequency selection network, and the signal after the frequency-selecting is deciphered through LM567 ATD IC2 through the 3rd pin signal input part that electric capacity 1C4 is coupled to LM567 ATD IC2; By its 8th pin output terminal output low level; Make triode VT2 conducting, LED is lighted, and the carrier wave overcurrent fault alerting signal of receiving extension set is described; Notifying cell specialty electrician operator on duty reaches the spot and handles; The second tunnel output is by the 7th pin output high level signal of single-chip microcomputer U1, through resistance R 7 current limlitings; Make triode Q1 conducting, promote the relay J adhesive, its contact J-1 transfers normally closed point to by often opening; Cut off load power source, protection supply line safety, thus ensure people's security of the lives and property.

An above-described preferred embodiment that is merely the utility model can not limit the scope that the utility model 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. overcurrent carrier wave warning device; It is characterized in that: comprise overcurrent sensing circuit (1), single chip machine controlling circuit (2), drive power-down circuit (21) and carrier signal phase lock circuitry (22); The output signal of said overcurrent sensing circuit (1) transfers to single chip machine controlling circuit (2) through triggering delay circuit (11); The output signal controlling of said single chip machine controlling circuit (2) is sent to and drives power-down circuit (21) and carrier signal phase lock circuitry (22), and the output signal of said carrier signal phase lock circuitry (22) sends to carrier signal decoding scheme (24) through frequency-selecting amplifier circuit (23).

2. overcurrent carrier wave warning device according to claim 1 is characterized in that: said single chip machine controlling circuit (2) and watchdog circuit (25) bidirectional data communication.

3. overcurrent carrier wave warning device according to claim 1; It is characterized in that: said overcurrent sensing circuit (1) is made up of diode VD2, capacitor C3, resistance R 1, the potentiometer RP that current transformer TA and output terminal thereof connect; Wherein behind the diode VD2 shnt capacitor C3; Parallelly connected with the series circuit of resistance R 1, potentiometer RP again, the winding of said current transformer TA is serially connected in the end of incoming cables of electricity consumption power lead, and its secondary induction current is directly proportional with home-use electric weight.

4. overcurrent carrier wave warning device according to claim 1 is characterized in that: said triggering delay circuit (11) adopts 555 monostable circuit IC.

5. overcurrent carrier wave warning device according to claim 1 is characterized in that: said carrier signal phase lock circuitry (22) is made up of LM567 tone decoder IC1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof.

6. overcurrent carrier wave warning device according to claim 1; It is characterized in that: said frequency-selecting amplifier circuit (23) is made up of elementary L1, electric capacity 2C2, the capacitor 2C3 of triode VT1, audio-frequency transformer (AFT) T, and sends data-signal through telephone wire to carrier signal decoding scheme (24) through secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T.

7. according to claim 1 or 6 described overcurrent carrier wave warning devices, it is characterized in that: said carrier signal decoding scheme (24) is made up of the audio-frequency transformer (AFT) T1, LM567 ATD IC2, triode VT2 and the LED that connect successively.