CN202230572U

CN202230572U - Novel alarm module

Info

Publication number: CN202230572U
Application number: CN2011203653548U
Authority: CN
Inventors: 傅俊豪; 傅加发; 傅汉水; 傅哲龙
Original assignee: FUJIAN JUNHAO ELECTRONICS Co Ltd
Current assignee: FUJIAN JUNHAO ELECTRONICS Co Ltd
Priority date: 2011-09-28
Filing date: 2011-09-28
Publication date: 2012-05-23
Anticipated expiration: 2021-09-28

Abstract

The utility model relates to a novel alarm module which includes a temperature signal acquisition circuit and a one-chip microcomputer control circuit. An output signal of the temperature signal acquisition circuit passes through an operation amplifier rectifier adjusting circuit and an A/D data converting circuit in order, and then is transmitted to the one-chip microcomputer control circuit. The output signal is output to a communication circuit and a carrier wave signal phase lock circuit by the one-chip microcomputer control circuit. The output signal of the carrier wave signal phase lock circuit is transmitted to a carrier wave signal decoding circuit via a frequency selective amplifier circuit. The novel alarm module adopts a temperature sensor to acquire the cable surface overtemperature, and then carries out the A/D data conversion to the cable surface overtemperature. A one-chip microcomputer judges and transmits a control signal, and remotely transmits the data to a control center, and a professional electrician timely eliminates a fault, thus reaching to the target of fire hazard prevention.

Description

A kind of novel alarm module

Technical field

The utility model relates to a kind of novel alarm module.

Background technology

The main performance of electrical fire generation is at present become flexible owing to the cable section header or loose contact causes heating to produce electrical fire; And traditional electrical fire pick-up unit mainly gathers signals such as electric current, voltage and judges whether its index transfinites, and can't play the purpose of fire preventing.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of novel alarm module is provided.

The utility model solves the technical scheme that its technical matters adopted: a kind of novel alarm module; Comprise temperature signal collection circuit and single chip machine controlling circuit; The output signal of said temperature signal collection circuit sends to single chip machine controlling circuit through amplifier rectification adjustment circuit, A/D data converting circuit successively; Single chip machine controlling circuit control exports telecommunication circuit, carrier signal phase lock circuitry to, 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 temperature signal collection circuit connects resistance R 1, R2, R3 by the output terminal of temperature sensor K, and diode D1, capacitor C 1 constitute.

Said telecommunication circuit is for adopting the RS485 communication interface circuit of SN75176 signal transmitting and receiving chip, and its output signal sends to PC.

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-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 electric 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 U2, triode VT2 and the LED that connect successively.

Through adopting above-mentioned technical scheme; The beneficial effect of the utility model is: the utility model adopts temperature sensor to gather the cable surface overtemperature; After the A/D data-switching, send control signal by the single-chip microcomputer judgement, data remote is arrived control center; By the timely eliminating of professional electrician personnel, reach the purpose of fire preventing to fault.

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

As shown in Figure 1; A kind of novel alarm module of the utility model; Comprise temperature signal collection circuit 1 and single chip machine controlling circuit 2; The output signal of said temperature signal collection circuit 1 sends to single chip machine controlling circuit 2 through amplifier rectification adjustment circuit 11, A/D data converting circuit 12 successively; Single chip machine controlling circuit 2 controls export telecommunication circuit 3, carrier signal phase lock circuitry 5 to, and the output signal of said carrier signal phase lock circuitry 5 sends to carrier signal decoding scheme 7 through frequency-selecting amplifier circuit 6.

As shown in Figure 2, said temperature signal collection circuit connects resistance R 1, R2, R3 by the output terminal of temperature sensor K, and diode D1, capacitor C 1 constitute.Act on the collecting temperature signal by temperature sensor K; It detects faint d. c. voltage signal, and after the signal adjustment, this signal is connected to the 3rd pin of operational amplifier IC2; Behind the 6th pin output amplifying signal by operational amplifier IC2; This signal is input to the 2nd pin of A/D data converter IC3, after interior data A/D conversion, forms datel circuit by the 2nd, 3,5 pin of single-chip microcomputer IC1 and the 5th, 6,7 pin of A/D data converter IC3.When K type temperature sensor detects cable body surface temperature and reaches certain value; The faint temperature voltage signal of T point; Amplify through operational amplifier IC2 computing, adjustment resistance R 4 can change the computing magnitude of voltage, again after the inner A/D data-switching of A/D data converter IC3; When the temperature data signal that reads A/D data converter IC3 conversion as single-chip microcomputer IC1 surpasses setting value; After single-chip microcomputer IC1 internal processes is judged, send control signal, form the RS485 telecommunication circuit, send data-signal by single-chip microcomputer IC1 by the 10th, 11,16 pin of single-chip microcomputer IC1 and the 1st, 2,3,4 pin of SN75176 signal transmitting and receiving chip IC 5; Drive SN75176 signal transmitting and receiving chip IC 5 and transmit warning message through system bus to PC, PC shows current failure message.Another road output is formed phase lock circuitry by the multivibrator that LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof constitute; Its oscillation frequency 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 (AFT) T constitute the frequency-selecting amplifier circuit; The 38th pin output high level signal by 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 lead and send by secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T, send data-signal, constitute the carrier signal decoding scheme by the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2, the LED that connect successively to the carrier wave main frame; 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 (AFT) T through electric capacity 1C1, audio-frequency transformer (AFT) T1, its secondary L3, electric capacity 1C2, electric capacity 1C3 form a carrier wave frequency selection 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, by its 8th pin output terminal output low level; Make triode VT2 conducting, LED is lighted, and has received the carrier data signal of extension set; The cable section header breaks down; Reach the real time remote on-line monitoring, collection carrier signal and the dual monitoring of system bus avoid failing to report and having solved the relevant difficult technical barrier that connects up.

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 to the scope that the utility model is contained.

Claims

1. novel alarm module; It is characterized in that: comprise temperature signal collection circuit (1) and single chip machine controlling circuit (2); The output signal of said temperature signal collection circuit (1) sends to single chip machine controlling circuit (2) through amplifier rectification adjustment circuit (11), A/D data converting circuit (12) successively; Single chip machine controlling circuit (2) control exports telecommunication circuit (3), carrier signal phase lock circuitry (5) to, and the output signal of said carrier signal phase lock circuitry (5) sends to carrier signal decoding scheme (7) through frequency-selecting amplifier circuit (6).

2. a kind of novel alarm module according to claim 1 is characterized in that: said single chip machine controlling circuit (2) and watchdog circuit (4) bidirectional data communication.

3. a kind of novel alarm module according to claim 1 is characterized in that: said temperature signal collection circuit (1) connects resistance R 1, R2, R3 by the output terminal of temperature sensor K, and diode D1, capacitor C 1 constitute.

4. a kind of novel alarm module according to claim 1 is characterized in that: said telecommunication circuit (3) is for adopting the RS485 communication interface circuit of SN75176 signal transmitting and receiving chip, and its output signal sends to PC.

5. a kind of novel alarm module according to claim 1 is characterized in that: said carrier signal phase lock circuitry (5) is made up of LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof.

6. a kind of novel alarm module according to claim 1; It is characterized in that: said frequency-selecting amplifier circuit (6) 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 electric wire to carrier signal decoding scheme (7) through secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T.

7. according to claim 1 or 6 described a kind of novel alarm modules, it is characterized in that: said carrier signal decoding scheme (7) is made up of the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2 and the LED that connect successively.