CN102354426A - Multipath fire alarm detector - Google Patents
Multipath fire alarm detector Download PDFInfo
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- CN102354426A CN102354426A CN2011102746770A CN201110274677A CN102354426A CN 102354426 A CN102354426 A CN 102354426A CN 2011102746770 A CN2011102746770 A CN 2011102746770A CN 201110274677 A CN201110274677 A CN 201110274677A CN 102354426 A CN102354426 A CN 102354426A
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Abstract
The invention relates to a multipath fire alarm detector which comprises temperature signal acquisition circuits, a singlechip control circuit and a keyboard operation circuit, wherein the temperature signal acquisition circuits have more than one circuit; output signals of the temperature signal acquisition circuits pass through an analogue switch circuit, an operation amplifying circuit and an analog/digital (AD) data conversion circuit sequentially to be sent to the singlechip control circuit, and are outputted to a display circuit, a signal driving circuit, a voice alarm circuit and a carrier signal phase locking circuit by the singlechip control circuit; and an output signal of the carrier signal phase locking circuit is sent to a carrier signal decoding circuit by a frequency-selecting amplifier. In the detector, the temperature on the surface of a cable is monitored by using a multipath K type temperature measuring sensor, and when the temperature on the surface of the cable reaches a set value, a carrier signal is sent to a host, an alarm signal is sent, the current state of a switch is displayed and the like, so strong evidences of fire accidents are provided for fire fighters and reliability is improved.
Description
Technical field
The present invention relates to a kind of detector, particularly be a kind of multichannel detector for fire alarm system.
Background technology
Along with deepening continuously of reform and opening-up, people's living standard improves constantly, and office space and inhabitation residence design aspect are perfect inadequately, in case that breaking out of fire just will be lost will be huge.Along with the raising of user power utilization amount and need for electricity, electrical fire on fire mainly contains three kinds of modes: one, electric spark and electric arc; Two, producing high temperature on electrical equipment or the circuit causes; Three, because the dangerous high temperature of connection terminal lead and the bad generation of termination contact, and owing to cable serious aging or loose contact cause occurrence index to improve constantly.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, a kind of multichannel detector for fire alarm system is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of multichannel detector for fire alarm system; Comprise temperature signal collection circuit; Single chip machine controlling circuit and keyboard operation circuit; Said temperature signal collection circuit is more than one the tunnel; The output signal of temperature signal collection circuit is successively through analog switching circuit; Operational amplification circuit; The A/D data converting circuit sends to single chip machine controlling circuit; Export display circuit to by single chip machine controlling circuit control; Signal drive circuit; Voice alarm circuit; The carrier signal phase lock circuitry, the output signal of said carrier signal phase lock circuitry sends to the carrier signal decoding scheme through the frequency-selecting amplifier circuit.
Said temperature signal collection circuit adopts K type temperature probe to gather the temperature on cable surface.
Said A/D data converting circuit adopts 8 A/D converters of high speed of band multichannel restorer and voltage reference.
Said display circuit is the LCD LCD.
Said voice alarm circuit mainly is made up of photoelectricity coupled circuit IC8, triode Q3, speech chip IC9, LM386 audio-frequency power amplifier IC10, loudspeaker Y.
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 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 U2, triode VT2 and the LED that connect successively.
Through adopting above-mentioned technical scheme; The invention has the beneficial effects as follows: the present invention adopts the K type temperature probe monitoring cable surface temperature of multichannel; When the cable surface temperature reaches setting value; Send carrier signal to main frame; Send alerting signal; And the display switch current state etc., thereby to fire failure strong evidence is provided to the fire fighter, improved reliability.
Description of drawings
Fig. 1 is a frame assumption diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1; Multichannel detector for fire alarm system of the present invention; Comprise temperature signal collection circuit 1; Single chip machine controlling circuit 2 and keyboard operation circuit 9; Said temperature signal collection circuit 1 is more than one the tunnel; The output signal of temperature signal collection circuit 1 is successively through analog switching circuit 11; Operational amplification circuit 12; A/D data converting circuit 13 sends to single chip machine controlling circuit 2; Export display circuit 3 to by single chip machine controlling circuit 2 controls; Signal drive circuit 4; Voice alarm circuit 5; Carrier signal phase lock circuitry 6, the output signal of said carrier signal phase lock circuitry 6 sends to carrier signal decoding scheme 8 through frequency-selecting amplifier circuit 7.
As shown in Figure 2; K1_K16 is a K type temperature probe; Has the output of good linear voltage; When the contact of K1 thermometric line contacts the cable surface temperature and reaches certain value; Temperature probe can produce small d. c. voltage signal; This signal is input to the 13rd pin of analog switching circuit IC3; By the inner switching controls of analog switching circuit IC3; The 3rd pin by analog switching circuit IC3 will be exported acquired signal; This signal is input to operational amplifier IC4 the 3rd pin; Behind its inner amplification; By its 6th pin output signal; This signal is input to the 1st pin of 8 A/D converter IC5 of high speed of band multichannel restorer and voltage reference; When the cable surface temperature surpasses setting value, after the comprehensive judgement of single-chip microcomputer IC1 internal processes, send control signal, the first via is exported by single-chip microcomputer IC1 the 33rd; 6; 7; The 3rd of 8 pin and LCD LCD IC7; 4; 5; 6 pin are formed the indicated data communication circuit; IC1 sends control command signal by single-chip microcomputer, drives LCD LCD IC7 displays temperature value and warning message; The second tunnel output makes triode Q2 conducting by single-chip microcomputer IC1 the 35th pin output high level signal, promotes the adhesive of relay J relay, provides one often to open or normally closed point, as signal feedback.Third Road output; The 39th pin output high level signal by single-chip microcomputer IC1; Through resistance R 10 current limlitings; Make photoelectricity coupled circuit IC8 get into conducting state; Make triode Q3 conducting; While speech chip IC9; LM386 audio-frequency power amplifier IC10 obtains operating voltage; The 2nd pin output audio signal by speech chip IC9; Be input to the 3rd pin input end of LM386 audio-frequency power amplifier IC10 through capacitor C 3 couplings; After LM386 audio-frequency power amplifier IC10 internal audio frequency signal amplifies; After capacitor C 6 couplings were amplified, Y sent alarm sound through loudspeaker by its 5th pin output.The four tunnel 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 32nd 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 to the carrier wave main frame.Audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2, LED by connecting successively constitute the carrier signal decoding scheme; 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; Received the carrier data signal of extension set, illustrated that electric fault has appearred in power supply commonly used, reaches real time and on line monitoring.
Described herein is 1 tunnel temperature detection control principle wherein, and other ways are identical with 1 the tunnel, no longer repeats here.
The keyboard control circuit of being made up of resistance R 39, keyswitch Q1-Q5 can be to alert sound setting, self check, button operation such as reset.
Above-described only is a preferred embodiment of the present invention, can not limit the scope that this practicality is implemented, and every equalization of doing according to claim of the present invention changes and decorates, and all should still belong to the scope that the present invention is contained.
Claims (8)
1. multichannel detector for fire alarm system; It is characterized in that: comprise temperature signal collection circuit (1); Single chip machine controlling circuit (2) and keyboard operation circuit (9); Said temperature signal collection circuit (1) is more than one the tunnel; The output signal of temperature signal collection circuit (1) is successively through analog switching circuit (11); Operational amplification circuit (12); A/D data converting circuit (13) sends to single chip machine controlling circuit (2); Export display circuit (3) to by single chip machine controlling circuit (2) control; Signal drive circuit (4); Voice alarm circuit (5); Carrier signal phase lock circuitry (6), the output signal of said carrier signal phase lock circuitry (6) sends to carrier signal decoding scheme (8) through frequency-selecting amplifier circuit (7).
2. multichannel detector for fire alarm system according to claim 1 is characterized in that: said temperature signal collection circuit (1) adopts K type temperature probe to gather the temperature on cable surface.
3. multichannel detector for fire alarm system according to claim 1 is characterized in that: said A/D data converting circuit (13) adopts 8 A/D converters of high speed of band multichannel restorer and voltage reference.
4. multichannel detector for fire alarm system according to claim 1 is characterized in that: said display circuit (3) is the LCD LCD.
5. multichannel detector for fire alarm system according to claim 1 is characterized in that: said voice alarm circuit (5) mainly is made up of photoelectricity coupled circuit IC8, triode Q3, speech chip IC9, LM386 audio-frequency power amplifier IC10, loudspeaker Y.
6. multichannel detector for fire alarm system 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. multichannel detector for fire alarm system according to claim 1; It is characterized in that: said frequency-selecting amplifier circuit (7) 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 (8) through secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T.
8. according to claim 1 or 7 described multichannel detector for fire alarm system, it is characterized in that: said carrier signal decoding scheme (8) is made up of the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2 and the LED that connect successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102746770A CN102354426A (en) | 2011-09-16 | 2011-09-16 | Multipath fire alarm detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102746770A CN102354426A (en) | 2011-09-16 | 2011-09-16 | Multipath fire alarm detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102354426A true CN102354426A (en) | 2012-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102746770A Pending CN102354426A (en) | 2011-09-16 | 2011-09-16 | Multipath fire alarm detector |
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| CN (1) | CN102354426A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676733A (en) * | 2013-11-29 | 2014-03-26 | 北方通用电子集团有限公司 | Circuit universal for digital display coding tool |
| CN108332879A (en) * | 2018-03-23 | 2018-07-27 | 福建省力得自动化设备有限公司 | A kind of integrated fluorescence optical fiber temperature demodulation device of multichannel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0102229A1 (en) * | 1982-08-27 | 1984-03-07 | Monicell Limited | Alarm system |
| CN2187466Y (en) * | 1993-12-02 | 1995-01-18 | 钱金龙 | Radio reporting device for medical transfusion |
| JP2003217046A (en) * | 2002-01-22 | 2003-07-31 | Matsushita Electric Works Ltd | Fire sensor, fire receiver, and fire alarm system using them |
| CN201319207Y (en) * | 2008-12-03 | 2009-09-30 | 泉州雷航电子有限公司 | Electrical fire alarm circuit |
| CN202230569U (en) * | 2011-09-16 | 2012-05-23 | 福建俊豪电子有限公司 | Multi-path fire alarming detector |
-
2011
- 2011-09-16 CN CN2011102746770A patent/CN102354426A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0102229A1 (en) * | 1982-08-27 | 1984-03-07 | Monicell Limited | Alarm system |
| CN2187466Y (en) * | 1993-12-02 | 1995-01-18 | 钱金龙 | Radio reporting device for medical transfusion |
| JP2003217046A (en) * | 2002-01-22 | 2003-07-31 | Matsushita Electric Works Ltd | Fire sensor, fire receiver, and fire alarm system using them |
| CN201319207Y (en) * | 2008-12-03 | 2009-09-30 | 泉州雷航电子有限公司 | Electrical fire alarm circuit |
| CN202230569U (en) * | 2011-09-16 | 2012-05-23 | 福建俊豪电子有限公司 | Multi-path fire alarming detector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676733A (en) * | 2013-11-29 | 2014-03-26 | 北方通用电子集团有限公司 | Circuit universal for digital display coding tool |
| CN108332879A (en) * | 2018-03-23 | 2018-07-27 | 福建省力得自动化设备有限公司 | A kind of integrated fluorescence optical fiber temperature demodulation device of multichannel |
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Application publication date: 20120215 |