CN201156284Y

CN201156284Y - Electric fire monitoring detector

Info

Publication number: CN201156284Y
Application number: CNU2008200739193U
Authority: CN
Inventors: 陈炳杰
Original assignee: TIANJIN BEIFANG HENGYE ELECTRIC TECHNOLOGY Co Ltd
Current assignee: TIANJIN BEIFANG HENGYE ELECTRIC TECHNOLOGY Co Ltd
Priority date: 2008-02-26
Filing date: 2008-02-26
Publication date: 2008-11-26
Anticipated expiration: 2018-02-26

Abstract

The utility model relates to an electric fire monitoring detector which comprises a keyboard circuit arranged in a casing, an external input circuit which is connected with an input opening of a singlechip; an indicator light circuit, a sound warning circuit, an LCD liquid crystal display circuit, a control output circuit. A direct current 24V output circuit is connected with an output opening of the singlechip; a residual current transformator and a current transformator are connected with a current collecting circuit which is connected with an electric parameter special collecting chip; the electric parameter special collecting chip and a power supply module are connected with the singlechip; a temperature sensor is connected with a temperature detection circuit; the temperature detection circuit, a clock circuit and a storage circuit are respectively connected with the input/the output openings of the singlechip; a RS485 bus communication circuit and a CAN bus communication circuit are connected with a communication port of the singlechip through a wire jumper. The electric fire monitoring detector has the beneficial effects of being capable of monitoring creepage, overload and temperature comprehensively at the same time, high integration level, greatly reducing the using cost, improving the monitoring reliability and being capable of more effectively finding problem in time and warning exactly.

Description

Detector for electric fire protection

Technical field

The utility model relates to a kind of electronic monitoring detecting devices, particularly a kind of detector for electric fire protection that is used for pre-electrical fire prevention generation.

Background technology

According to the statistics of relevant departments, the fire that apparatus failure causes in the building fire reason occupies 34% of all fire sums, lists in the first place in all fire causes.Wherein because the fire that electric leakage produces accounts for more than 70% of electrical fire.With the continuous increase of electric line with service time, catabiosis in various degree will appear, and can cause the generation of leaky like this, and bring out electrical fire.Therefore effectively take precautions against electrical fire, it is crucial particularly effectively taking precautions against the fire that is caused by factors such as electric leakage, short circuit, overloads.Detector for electric fire protection can effectively detect whether there are faults such as electric leakage, short circuit, overload, overtemperature in the circuit, do not sending alerting signal before the breaking out of fire, can send control signal if necessary, disconnect the isolating switch of corresponding circuit, fire is eliminated in bud.Because in the past product function was more single, volume is excessive, and device falls behind, and use can't networking separately, has limited further prevention and control to electrical fire.

Summary of the invention

It is the detector for electric fire protection of one that the not enough the utility model that exists in view of prior art provides a kind of monitor set electric leakage, electric current, temperature, controlling alarm, communication networking.

The technical scheme that the utility model is adopted for achieving the above object is, a kind of detector for electric fire protection, comprise casing, it is characterized in that: also comprise the single-chip microcomputer that is arranged in the casing, key circuit, indicator light circuit, the audible alarm circuit, the LCD liquid crystal display circuit, outside input circuit, controlling output circuit, direct current 24V output circuit, power module, RS485 bus communication circuit, CAN bus communication circuit, memory circuit, clock circuit, temperature detection circuit, the electric parameter special chip, the current acquisition circuit, residual current transformer, current transformer, temperature sensor, described key circuit, outside input circuit is connected with the input port of single-chip microcomputer respectively, described indicator light circuit, the audible alarm circuit, the LCD liquid crystal display circuit, controlling output circuit, direct current 24V output circuit is connected with the delivery outlet of single-chip microcomputer respectively, described residual current transformer, current transformer is connected with the current acquisition circuit respectively, the current acquisition circuit is connected with the special-purpose acquisition chip of electric parameter, the special-purpose acquisition chip of electric parameter, power module is connected with single-chip microcomputer respectively, described temperature sensor is connected with temperature detection circuit, temperature detection circuit, clock circuit, memory circuit, be connected described RS485 bus communication circuit respectively with the I/O port of single-chip microcomputer, CAN bus communication circuit is connected with the communication port of single-chip microcomputer by wire jumper respectively.

The beneficial effects of the utility model are: detector for electric fire protection can be monitored simultaneously to electric leakage, overload, temperature, the integrated level height, greatly reduce use cost, comprehensive monitoring to electric leakage, overload, temperature, improved the reliability of monitoring, can pinpoint the problems more effective, timely and accurately report to the police.Current monitoring adopts the special-purpose acquisition chip of high-precision electric parameter, has improved the acquisition precision of electric current, the actual conditions of kinetic current more accurately, electric leakage and overload are reported to the police more accurately and timely.

Leakage current, phase current or line current, the temperature value that can show monitoring in real time, can employing sound during warning, the light prompting just can cancel until hand-reset, information such as the type of display alarm simultaneously, alarming value, time of fire alarming, but and store alarms record, the alarm logging power down is not lost, and can inquire about at any time.Can make pilot relay output during warning, disconnect corresponding protection equipment.This detector externally provides direct current 24V output during warning, can connect independent audible-visual annunciator and other panalarm.The utility model detector for electric fire protection also provides the input warning function, can connect the switching value output of miscellaneous equipment, and this detector can be reported to the police when the miscellaneous equipment that connects has switching value output.This controller adopts RS485 and CAN bus communication circuit, can select to use, can be with instantaneous value, warning message, the high one-level watch-dog of information uploading such as parameter is set.

Description of drawings:

Fig. 1 is the utility model theory diagram and as Figure of abstract.

Embodiment:

As shown in Figure 1, the utility model comprises the special-purpose acquisition chip 15 of single-chip microcomputer 1, key circuit 2, indicator light circuit 3, audible alarm circuit 4, LCD liquid crystal display circuit 5, outside input circuit 6, controlling output circuit 7, direct current 24V output circuit 8, power module 9, RS485 bus communication circuit 10, CAN bus communication circuit 11, memory circuit 12, clock circuit 13, temperature detection circuit 14, electric parameter, current acquisition circuit 16, residual current transformer 17, current transformer 18, the temperature sensor 19 that is arranged in the casing.Key circuit 2 links to each other with the input port of single-chip microcomputer 1, and alarm parameters can be set, and checks alarm logging, self check and reset, function such as noise reduction.

Indicator light circuit 3 links to each other with the delivery outlet of single-chip microcomputer 1, adopts super bright emitting led pilot lamp to show operation, communication, the alarm condition of detector.Dissimilar warnings has corresponding pilot lamp correspondence, shows more directly perceived.The alarm condition pilot lamp is lighted until reset controller under alarm condition always and is just extinguished.

Audible alarm circuit 4 links to each other with the delivery outlet of single-chip microcomputer 1, provides audible alarm under alarm condition, can manually carry out noise reduction by ventil, can sound once more when new warning is arranged.

LCD liquid crystal display circuit 5 links to each other with the delivery outlet of single-chip microcomputer 1, adopts Chinese interface to show various information.

Outside input circuit 6 links to each other with single-chip microcomputer 1 input port, and detector enters alarm condition when the outside has other equipment that need report to the police that signal is provided.

Controlling output circuit 7 links to each other with the delivery outlet of single-chip microcomputer 1, and the output signal of single-chip microcomputer 1 is through the output of driving circuit pilot relay when taking place to report to the police, and output signal can connect outer protection equipment.

Direct current 24V output circuit 8 links to each other with the delivery outlet of single-chip microcomputer 1, and output direct current 24V can connect independently audible-visual annunciator when taking place to report to the police.

The RS485 that is made of chip MAX487E and optocoupler NEC2701,6N137 isolates communication bus and isolates bus with the CAN that is made of chip MCP2510, PCA80C250 and optocoupler 6N137 and link to each other with the communication port of single-chip microcomputer by the bar line, can be real-time Monitoring Data, warning message and state, parameter is set uploads high one-level watch-dog.

Link to each other with the I/O port of single-chip microcomputer 1 respectively by chip AT24C64 memory circuit 12 that constitutes and the clock circuit 13 that constitutes by DS1302, be used for preserving alarm logging and system clock is provided.

Temperature sensor 19 links to each other with temperature detection circuit 14, and temperature value is gathered, calculated to the voltage signal that temperature detection circuit 14 becomes single-chip microcomputer 1 to discern the conversion of signals of temperature sensor by single-chip microcomputer 1.Residual current transformer 17 summation current transformers 18 link to each other with current acquisition circuit 16, by current acquisition circuit 16 transducer signal is processed into 15 signals that can use of the special-purpose acquisition chip of electric parameter, the special-purpose acquisition chip 15 of electric parameter becomes digital quantity with conversion of signals and is kept in the chip and can accomplishes real-time collection constantly refreshing, the special-purpose acquisition chip 15 of electric parameter adopts spi bus to link to each other with single-chip microcomputer, model is ATT7022A, ATT7022B, can read real-time measurement result fast.

RS485 bus communication circuit 10 and CAN bus communication circuit 11 adopt isolation technology as mentioned above.

The model of single-chip microcomputer 1 employing is PIC18F6520, PIC18F6527, PIC18F6622, PIC18F6627 as mentioned above.

Claims

1. detector for electric fire protection, comprise casing, it is characterized in that: also comprise the single-chip microcomputer (1) that is arranged in the casing, key circuit (2), indicator light circuit (3), audible alarm circuit (4), LCD liquid crystal display circuit (5), outside input circuit (6), controlling output circuit (7), direct current 24V output circuit (8), power module (9), RS485 bus communication circuit (10), CAN bus communication circuit (11), memory circuit (12), clock circuit (13), temperature detection circuit (14), electric parameter special chip (15), current acquisition circuit (16), residual current transformer (17), current transformer (18), temperature sensor (19), described key circuit (2), outside input circuit (6) is connected with the input port of single-chip microcomputer (1) respectively, described indicator light circuit (3), audible alarm circuit (4), LCD liquid crystal display circuit (5), controlling output circuit (7), direct current 24V output circuit (8) is connected with the delivery outlet of single-chip microcomputer (1) respectively, described residual current transformer (17), current transformer (18) is connected with current acquisition circuit (16) respectively, current acquisition circuit (16) is connected with the special-purpose acquisition chip of electric parameter (15), the special-purpose acquisition chip (15) of electric parameter, power module (9) is connected with single-chip microcomputer (1) respectively, described temperature sensor (19) is connected with temperature detection circuit (14), temperature detection circuit (14), clock circuit (13), memory circuit (12), I/O port with single-chip microcomputer (1) is connected respectively, described RS485 bus communication circuit (10), CAN bus communication circuit (11) is connected by the communication port of wire jumper with single-chip microcomputer (1) respectively.

2. detector for electric fire protection according to claim 1 is characterized in that: the model that the special-purpose acquisition chip of described electric parameter (15) adopts is ATT7022A, ATT7022B.

3. detector for electric fire protection according to claim 1 is characterized in that: the model that described single-chip microcomputer (1) adopts is PIC18F6520, PIC18F6527, PIC18F6622, PIC18F6627.