CN103810810A

CN103810810A - Detector for electric leakage fire monitoring

Info

Publication number: CN103810810A
Application number: CN201210440658.5A
Authority: CN
Inventors: 陶建臣; 黄海涛; 黄广凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-11-07
Filing date: 2012-11-07
Publication date: 2014-05-21

Abstract

The invention belongs to the technical field of detectors and particularly relates to a detector for electric leakage fire monitoring. The detector for electric leakage fire monitoring, good in monitoring and detecting effect and low in cost, comprises a single-chip microcomputer, a temperature sensor, a smog sensor, a gas sensor, a leakage current transformer, an A/D conditioning circuit, an audible-visual alarm, an EEPROM (Electrical Erasable Programmable Read Only Memory), a keyboard, an LCD (Liquid Crystal Display), an RS485 bus, a clock, a releasing controller and a fire-fighting interface. The structural key points of the detector are that ports of the single-chip microcomputer are respectively connected with the temperature sensor, the smog sensor, the gas sensor, the A/D conditioning circuit, the audible-visual alarm, the EEPROM, the keyboard, the LCD, the RS485 bus, the clock, the releasing controller and the fire-fighting interface; and the A/D conditioning circuit is connected with the leakage current transformer.

Description

Leakage fire monitoring detector

Technical field

the invention belongs to detector technology field, relate in particular to a kind of leakage fire monitoring detector.

Background technology

electrical fire is high in recent years, and in order to contain the ascendant trend of electrical fire, relevant government department works out or revised related standards standard in succession, requires to arrange under construction Electric Leakage Fire Alarm.In GB13955-2005 " installation and operation of aftercurrent action protecting equipment ", to the definition of Electric Leakage Fire Alarm be: residual current acting electric fire monitoring system refers to the electrical fire Real-Time Monitoring forming with the mutual inductor of monitoring residual current, residual current detector, alarm or controller and implements the device of reporting to the police or cutting off the electricity supply." fire-proof leakage current alarm " renamed as " electric fire monitoring system " by GB 14287-2005 " electric fire monitoring system " new standard of having implemented on June 1st, 2006, and be subdivided into 3 parts, part 1: electrical fire monitoring device; Part 2: residual current type detector for electric fire protection; The 3rd part: temperature-measuring-type electrical fire.

existing leakage fire monitoring detector monitoring Effect on Detecting is not ideal enough, and cost is higher.

Summary of the invention

the present invention is exactly for the problems referred to above, and a kind of leakage fire monitoring detector that Effect on Detecting is good, cost is low of monitoring is provided.

for achieving the above object, the present invention adopts following technical scheme, the present invention includes single-chip microcomputer, temperature sensor, smoke transducer, gas sensor, leakage current transformer, A/D modulate circuit, audible-visual annunciator, EEPROM, keyboard, LCD, RS485 bus, clock, tripping controller, fire coupling, its structural feature one-chip machine port respectively with temperature sensor, smoke transducer, gas sensor, A/D modulate circuit, audible-visual annunciator, EEPROM, keyboard, LCD, RS485 bus, clock, tripping controller, fire coupling is connected, A/D modulate circuit is connected with leakage current transformer.

as a kind of preferred version, single-chip microcomputer of the present invention adopts STC89LE516AD single-chip microcomputer.

as another kind of preferred version, clock of the present invention adopts DS1302 chip.

beneficial effect of the present invention: the function that realizes detection of electrical leakage warning and independent optional dropout control, can fire-fighting access simultaneously, can effectively monitor the electrical fire that electric leakage causes, detect the object that reaches expection through experiment, and adopt modular design to be easy to upgrading, man-machine interface easy operating, Costco Wholesale is low, is easy to the marketization.

Accompanying drawing explanation

in order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with the drawings and the specific embodiments, the present invention is further elaborated.Should be appreciated that embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

fig. 1 is schematic block circuit diagram of the present invention.

Embodiment

as shown in the figure, the present invention includes single-chip microcomputer, temperature sensor, smoke transducer, gas sensor, leakage current transformer, A/D modulate circuit, audible-visual annunciator, EEPROM, keyboard, LCD, RS485 bus, clock, tripping controller, fire coupling, one-chip machine port is connected with temperature sensor, smoke transducer, gas sensor, A/D modulate circuit, audible-visual annunciator, EEPROM, keyboard, LCD, RS485 bus, clock, tripping controller, fire coupling respectively, and A/D modulate circuit is connected with leakage current transformer.

described single-chip microcomputer adopts STC89LE516AD single-chip microcomputer.This series monolithic is that superpower anti-interference, the low-power consumption of a new generation, electromagnetic radiation are to external world few, single-chip microcomputer at a high speed, and 51 single-chip microcomputers that its instruction set is completely compatible traditional, carry watchdog function.

described clock adopts DS1302 chip.DS1302 chip adopts 3 line serial mode and single chip communications.In sheet, have the static RAM (SRAM) of 31 bytes, calendar clock can carry out leap year compensation automatically.Real-time clock is realized calendar function, real-time read clock information in the time moving or record.LCM module adopts the RTL12864-S chip of serial ports banding Chinese word library, realizes and operates visual and show that real time implementation software comprises master routine, interrupt routine, data processor, button judgement and threshold value refresh routine, A/D transfer delay program, display routine, RS485 signal procedure, real-time clock program etc.

self check after system of the present invention starts, through initialization, single-chip microcomputer arranges 8 tunnel parameters, temperature alarming value, leakage current alarming value, current transformer ratio, warning and early warning delay time, then receives 8 tunnel real time datas every 50 ms.When program brings into operation, first gather smoke detector signal and hygrosensor signal, after signal processing, can judge whether that by current result fire occurs.If can judge on firely, export fire alarm, and drive corresponding relay, cut off the electricity supply.If judge abnormal rising or smoke signal in the temperature short time, current signal arrives exceptional value and sends early warning signal, and further pays close attention to the variation tendency of temperature and smoke signal, if trend continues to raise, reports to the police and does follow-up work, reports to the police otherwise cancel.

be understandable that, above about specific descriptions of the present invention, only for being described, the present invention is not limited to the described technical scheme of the embodiment of the present invention, those of ordinary skill in the art is to be understood that, still can modify or be equal to replacement the present invention, to reach identical technique effect; Use needs as long as meet, all within protection scope of the present invention.

Claims

1. leakage fire monitoring detector, comprise single-chip microcomputer, temperature sensor, smoke transducer, gas sensor, leakage current transformer, A/D modulate circuit, audible-visual annunciator, EEPROM, keyboard, LCD, RS485 bus, clock, tripping controller, fire coupling, it is characterized in that one-chip machine port respectively with temperature sensor, smoke transducer, gas sensor, A/D modulate circuit, audible-visual annunciator, EEPROM, keyboard, LCD, RS485 bus, clock, tripping controller, fire coupling is connected, A/D modulate circuit is connected with leakage current transformer.

2. leakage fire monitoring detector according to claim 1, is characterized in that described single-chip microcomputer adopts STC89LE516AD single-chip microcomputer.

3. leakage fire monitoring detector according to claim 1, is characterized in that described clock adopts DS1302 chip.