CN201993871U

CN201993871U - Novel fire detector

Info

Publication number: CN201993871U
Application number: CN2011201086590U
Authority: CN
Inventors: 傅哲龙
Original assignee: QUANZHOU JICHAO ELECTRONIC CO Ltd
Current assignee: QUANZHOU JICHAO ELECTRONIC CO Ltd
Priority date: 2011-04-14
Filing date: 2011-04-14
Publication date: 2011-09-28
Anticipated expiration: 2021-04-14

Abstract

The utility model relates to an emergency power supply detector, in particular to a novel fire detector, which comprises a leakage signal acquisition amplifier module, a central processing unit and an optocoupler signal trigger module. Signals acquired by the leakage signal acquisition amplifier module are respectively input to a leakage early-warning signal voltage comparison module and a leakage warning signal voltage comparison module, and output signals of the leakage early-warning signal voltage comparison module and the leakage warning signal voltage comparison module are sent to central processing unit. The output end of the central processing unit is connected with a communication interface circuit and a warning circuit, and the optocoupler signal trigger module is communicated with bidirectional data of the central processing unit. When the leakage fault is detected, the novel fire detector sends two modes of early warning and failure warning. When leakage current reaches 80% of alarm current, the novel fire detector sends an early-warning signal, and when the leakage current exceeds a setting failure warning value, the novel fire detector sends an alarm signal after a singlechip controls and judges the leakage current. The novel fire detector has the functions of on-site alarm, communication and networking and fire protection forced switchover.

Description

A kind of novel fire detector

Technical field

The utility model relates to a kind of standby power supply pick-up unit, particularly be a kind of novel fire detector.

Background technology

Along with deepening continuously of reform and opening-up, the improving constantly of people's living standard, office space and inhabitation residence design aspect are perfect inadequately, in case the breaking out of fire loss is huge.Electrical fire shared proportion in all fire is more and more higher in recent years, and therefore effective control electrical fire is particularly effectively controlled the fire that factors such as electric leakage, short circuit, overload cause, and is most important to fire-fighting work now.

Summary of the invention

The purpose of this utility model is to provide a kind of telotism and reliable more novel fire detector.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of novel fire detector, comprise electric leakage signal collection amplification module, central processing unit and optocoupler signal triggering module, the signal that described electric leakage signal is gathered the amplification module collection is input to electric leakage early warning signal voltage comparison module and leakage-current alarm signal voltage comparison module respectively, the output signal of electric leakage early warning signal voltage comparison module and leakage-current alarm signal voltage comparison module sends to central processing unit, described central processing unit output connects communication interface circuit, warning circuit, described optocoupler signal triggering module and central processing unit bidirectional data communication.

Described electric leakage signal is gathered amplification module and is made of telefault inductive probe, current rectifying and wave filtering circuit and operational amplification circuit.

Described central processing unit also connects a watchdog module.

Described communication interface circuit adopts the RS485 datel circuit, and it is connected to com port by 75176 communication interface chips.

Optocoupler signal triggering module connects the photoelectricity coupled circuit by trigger switch output and forms.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: when the utility model detector detects leak current fault, send two kinds of patterns of early warning and fault alarm, when leakage current reach alarm current 80% the time, send early warning signal, set the fault alarm value, send alerting signal when leakage current surpasses, after Single-chip Controlling is judged, have onsite alarming, communication networking, fire-fighting forced cutting function.

Description of drawings

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

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

Embodiment

As shown in Figure 1, a kind of novel fire detector of the present utility model, comprise electric leakage signal collection amplification module 1, central processing unit 2 and optocoupler signal triggering module 3, the signal that described electric leakage signal is gathered amplification module 1 collection is input to electric leakage early warning signal voltage comparison module 11 and leakage-current alarm signal voltage comparison module 12 respectively, the output signal of electric leakage early warning signal voltage comparison module 11 and leakage-current alarm signal voltage comparison module 12 sends to central processing unit 2, described central processing unit 2 outputs connect communication interface circuit 21, warning circuit 22, described optocoupler signal triggering module 3 and central processing unit 2 bidirectional data communications, described central processing unit 2 also connects a watchdog module 5.

As shown in Figure 2, in when, live wire electric leakage earth fault or phase line taking place earth-fault current being arranged when, live wire produces the weak voltage signal with the two ends that zero line passes the LN inductive coil, this signal is input to the 3rd pin of operational amplifier U1, after operational amplifier U1 internal arithmetic is amplified, again through diode D3 rectification, output terminal after capacitor C 6 filtering signals are handled is input to the M1 point, the voltage that M1 is ordered is transported to the 2nd pin of electric leakage early warning signal comparison amplifier U2 and the 6th pin of leakage-current alarm signal comparison amplifier U3 respectively, carry out reference voltage relatively through the two-stage voltage comparator circuit, judge it is leakage-current alarm or alert status respectively, when being judged as alert status, the 1st pin output high level of electric leakage early warning signal comparison amplifier U2, through resistance R 12 current limlitings, the 39th pin I/O end that is input to single-chip microcomputer IC1 is high potential state, judge that through single-chip microcomputer IC1 internal processes control divides two-way output, first via output is by the 1st of 75176 communication interface chip U5,2,3, the 10th of 4 pin and single-chip microcomputer IC1,11,28 pin are formed the RS485 datel circuit, send the current information data through 75176 communication interface chip U5 to PC, show by PC and preserve data message; The 7th pin output low level of secondary route single-chip microcomputer IC1 through resistance R 16 current limlitings, ends triode Q1, and promotion loudspeaker YD sends and " ticks.。。" the sound.When being judged as the leak current fault alarm condition, leakage-current alarm signal comparison amplifier U3 the 7th pin output high level, through resistance R 11 current limlitings, the 36th pin I/O end that is input to single-chip microcomputer IC1 is high potential state, judge that through single-chip microcomputer IC1 internal processes control divides two-way output, first via output is formed the RS485 datel circuit by the 1st, 2,3,4 pin of 75176 communication interface chip U5 and the 10th, 11,28 pin of single-chip microcomputer IC1, send the current information data through 75176 communication interface chip U5 to PC, show by PC and preserve data message; The 7th pin output low level of secondary route single-chip microcomputer IC1 through resistance R 16 current limlitings, ends triode Q1, and promotion loudspeaker YD sends and " ticks.。。" the sound.Form optocoupler signal triggering fire-fighting link by contact-making switch T1 output connection photoelectricity coupled circuit U1 and cut off circuit by force, when fire alarm system detects the fire dangerous situation, contact-making switch T1 closure, this trigger voltage makes photoelectricity coupled circuit U1 conducting through resistance R 19 current limlitings, and this moment, the 25th pin of single-chip microcomputer IC1 was low level state, after single-chip microcomputer IC1 control and treatment, the 7th pin output low level by single-chip microcomputer IC1, through resistance R 16 current limlitings, triode Q1 is ended, promotion loudspeaker YD sends and " ticks.。。" the sound.

Above-described only is a preferred embodiment of the present 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. novel fire detector, comprise electric leakage signal collection amplification module (1), central processing unit (2) and optocoupler signal triggering module (3), it is characterized in that: the signal that described electric leakage signal is gathered amplification module (1) collection is input to electric leakage early warning signal voltage comparison module (11) and leakage-current alarm signal voltage comparison module (12) respectively, the output signal of electric leakage early warning signal voltage comparison module (11) and leakage-current alarm signal voltage comparison module (12) sends to central processing unit (2), described central processing unit (2) output connects communication interface circuit (21), warning circuit (22), described optocoupler signal triggering module (3) and central processing unit (2) bidirectional data communication.

2. a kind of novel fire detector according to claim 1 is characterized in that: described electric leakage signal is gathered amplification module (1) and is made of telefault inductive probe, current rectifying and wave filtering circuit and operational amplification circuit.

3. a kind of novel fire detector according to claim 1 is characterized in that: described central processing unit (2) also connects a watchdog module (5).

4. a kind of novel fire detector according to claim 1 is characterized in that: described communication interface circuit (21) adopts the RS485 datel circuit, and it is connected to com port by 75176 communication interface chips.

5. a kind of novel fire detector according to claim 1 is characterized in that: optocoupler signal triggering module (3) connects the photoelectricity coupled circuit by trigger switch output and forms.