CN201796459U - Electric leakage and temperature monitoring detector - Google Patents
Electric leakage and temperature monitoring detector Download PDFInfo
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- CN201796459U CN201796459U CN2010205349251U CN201020534925U CN201796459U CN 201796459 U CN201796459 U CN 201796459U CN 2010205349251 U CN2010205349251 U CN 2010205349251U CN 201020534925 U CN201020534925 U CN 201020534925U CN 201796459 U CN201796459 U CN 201796459U
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Abstract
The utility model relates to an electric leakage and temperature monitoring detector. In the detector, a main circuit is formed by a main central processing unit (CPU), a power circuit, a sound control circuit, a key sampling circuit, a digital tube indicating lamp control circuit, a temperature sampling circuit, a current sampling circuit, an RS 485 communication circuit and a relay control circuit; the electric leakage and temperature monitoring detector outputs a communication signal through the RS 485 communication circuit, and is connected with a bus through the RS485 communication circuit and is connected with superior monitor equipment by the bus, so that electrical fire sensitive parameters such as electric leakage, high temperature and the like can be acquired, and an alarm signal can be uploaded to a superior computer in time when an alarm happens; and the RS485 communication circuit has the characteristics of safety, reliability and long communication distance. The electric leakage and temperature monitoring detector is convenient to assemble and use, has high sensitivity, and can monitor an electrical system in real time; after a proper electric leakage alarm value is set and an electric leakage failure appears in a circuit and equipment and is more than the set value, the alarm is immediately uploaded, so that various accidents such as electrical fire and the like which are caused by electric leakage can be effectively prevented.
Description
Technical field
The utility model relates to electronics and electromagnetic technology field, and particularly a kind of electric leakage and monitoring temperature detector are applied to monitor in real time the electric leakage and the temperature regime of electric wiring.
Background technology
At present, in industry and civilian electric power system, exist the hidden danger of fire always and be accompanied by the generation of disaster, it is threatening the mankind's the life and the safety of property constantly, becomes one of major disaster that has influenced human ordinary production and existence.Along with progress of science and technology and growth in the living standard, consuming device and power consumption all increase severely with day, the increase that thereupon also brings electrical fire.Electrical fire has become one of the factor of mainly catching fire in the domestic in recent years emphasis fire, in Building Fire Protection and fire-fighting electrical design, how to utilize existing electric fire-fighting system and technological means to solve electrical fire prevention and control, become the emphasis subject under discussion that recent NFA cura legitima department is is researching and solving.According to the data that 2002 " Chinese fire statistics yearbook " announced, the fire that China's main cities was taken place from 1978 to 2002, electrical fire rises to 27.5% from accounting for 5.7% of fire total amount, ranks first in the fire cause always.The serious consequence that electrical fire causes should make us watchful and paid attention to.The reason that causes electrical fire mainly contains: short circuit, electric leakage, overload, loose contact, light fixture and the electric heating appliance combustible etc. that ignites.The electric shock accidents and the fire that are caused by electric leakage, overload constantly take place, and this fire has more disguise compared with the fire that short circuit etc. causes, normally take place stealthily, also be difficult to find out real reason (being covered by illusions such as short circuits) after catching fire, harmfulness is also just bigger.
Along with the raising of development and national economy and people's living standard, skyscraper, place of public amusement get more and more.Because buildings itself and the inner combustible that exists, particularly the inflammable material and the ever-increasing consumer of use in the finishing increase the generation discipline of building electric fire greatly, and the people's the person and property safety caused very big threat.
As time goes on have in various degree catabiosis with electric line and equipment, so not only will cause the generation of leaky, also can bring the harm of two aspects, cause energy dissipation on the one hand; On the other hand personal safety is constituted a threat to, even can be because electric leakage seriously causes earth fault and bring out electrical fire.
Existing electric fire alarm device is with before electrical fire takes place, be the building electric fault formation stage to send alerting signal, take measures to design for purpose, from its structure, comprise current transformer, isolating switch and the control circuit that links to each other with the output terminal of the control input end of isolating switch and current transformer.Its total course of work is: control circuit changes via the electric current of current transformer monitoring with electric line, thereby determine whether there is the electric leakage that can cause electrical fire with electric line, short circuit, faults such as overload, as existing, control circuit promptly sends control signal control isolating switch and disconnects, make the electricity consumption line broken circuit that has electric fault, and send alerting signal and remind the staff to check, appliance fire hidden danger is eliminated in bud the most at last, but existing electric fire alarm device can only use separately as stand-alone product, can't use with fire product networkings such as Related product such as fire alarm control units, from to a certain degree, further prevention and control have been limited to electrical fire.Thereby can't fundamentally stop electrical fire.
At present, in electric wiring, used the leakage current protection device for protection equipment and personal safety.The characteristics of these safety guards are to have only when occurring surpassing the situation of specified leakage current in the load circuit; the passive circuit of cutting off the electricity supply of; guarantee Electrical Safety; but it can not play in advance the initiatively effect of prevention to the fire that electric electric leakage causes; and the characteristic of when electric leakage reaches setting value, just cutting off the electricity supply; the stability that is unfavorable for the electricity consumption of whole unit, it only is applicable to the consumer terminal protection, and is not suitable for the protection to whole using electricity system.
Thereby; existing detector for electric fire protection product still has needs improved space, and at present domestic do not have a kind of electric leakage situation that can monitor electric wiring in real time can the detector for electric fire protection product that whole using electricity system is effectively protected to be occurred again as yet.
Summary of the invention
The purpose of this utility model is exactly defective and the technical matters that exists with technology at existing; the technical scheme of a kind of new pattern creepage and monitoring temperature detector is provided; use electric leakage and monitoring temperature detector that the technical program is produced; can solve above-mentioned technical matters effectively; promptly in various electrical operation circuits; realize the electric leakage and the temperature conditions of monitoring electric wiring in real time; and whole using electricity system effectively protected; can set safety standard according to the performance requirement of external environment situation and electric wiring operation with electric unit; set the electric leakage critical value that allows; can carry out real-time monitoring to monitored electric wiring electric leakage situation like this; accomplish prevention in advance to causing dangerous electric leakage factor; the fire that is caused by electric electric leakage is strangled among omen; avoided the accident that causes because of electric electric leakage effectively, guaranteed again with electric unit at the electrical stability of using that is lower than under the electric leakage critical value situation that safety standard allows.
The utility model is to realize by such technical scheme: a kind of electric leakage and monitoring temperature detector is characterized in that: main circuit is made of host CPU, power circuit, sound control circuit, button sample circuit, charactron pilot lamp control circuit, temperature sampling circuit, current sampling circuit, RS485 communicating circuit and control relay circuit; Described power circuit, sound control circuit, button sample circuit, charactron pilot lamp control circuit, temperature sampling circuit, current sampling circuit, RS485 communicating circuit, control relay circuit are connected with host CPU respectively, temperature sampling circuit comprises four temperature sensors, current sampling circuit comprises four zero-sequence transformer and the transformer disconnection testing circuit that is connected with four zero-sequence transformer, and the RS485 communicating circuit connects host computer via bus.
Transformer disconnection testing circuit in the described current sampling circuit is formed by connecting by analog selection switch CD4052, amplifier LM358, photoelectrical coupler NEC2701, transistor and Resistor-Capacitor Unit, and transformer disconnection testing circuit and four zero-sequence transformer connect and compose four tunnel sense channels of surveying electric leakage signals.
Four temperature sensors of temperature sampling circuit adopt the PT100 temperature sensitive resister.
Main circuit is gathered No. four mutual inductors and is surveyed electric leakage signal, by current sampling circuit electric leakage signal is delivered to the host CPU processing signals; No. four temperature sensor detecting temperature signals are set, and signal is handled by temperature sampling circuit, is delivered to host CPU again and handles; Host CPU by the RS485 communicating circuit, is uploaded to host computer via bus with data through calculating and handling.
The electric leakage signal that current sampling circuit is extracted by mutual inductor, and electric leakage signal delivered to host CPU; Temperature sampling circuit extracts temperature signal by temperature sensor, and temperature signal is delivered to host CPU; Electric leakage, monitoring temperature detector are by RS485 communicating circuit outputting communication signal.
The utility model has the advantages that: electric leakage and monitoring temperature detector link to each other with upper monitoring equipment by bus by RS485 communicating circuit connecting bus, form complete electric fire monitoring system as the end-probing device; Can gather electrical fire sensitive parameters such as electric leakage, high temperature, and can in time upload alerting signal to host computer when taking place to report to the police, it is safe and reliable that the RS485 communication line has, but the long characteristics of communication distance; The utility model is reasonable in design, easy to install, highly sensitive, can monitor in real time electrical system, after setting suitable leakage-current alarm value, circuit and equipment leak current fault occurs and greater than after the setting value, upload alarm immediately, install and use this electric leakage, monitoring temperature detector and can effectively prevent the various accidents such as electrical fire that cause because of electric leakage.
Description of drawings
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is transformer disconnection testing circuit figure.
Embodiment
Understand the utility model for clearer, describe the embodiment of utility model below in conjunction with accompanying drawing in detail:
As depicted in figs. 1 and 2, electric leakage and monitoring temperature detector, main circuit is made of host CPU 1, power circuit 2, sound control circuit 3, button sample circuit 4, charactron pilot lamp control circuit 5, temperature sampling circuit 6, current sampling circuit 7, RS485 communicating circuit 8 and control relay circuit 9; Described power circuit 2, sound control circuit 3, button sample circuit 4, charactron pilot lamp control circuit 5, temperature sampling circuit 6, current sampling circuit 7, RS485 communicating circuit 8, control relay circuit 9 are connected with host CPU 1 respectively, temperature sampling circuit 6 comprises four temperature sensors, current sampling circuit 7 comprises four zero-sequence transformer and the transformer disconnection testing circuit that is connected with four zero-sequence transformer, and RS485 communicating circuit 8 connects host computer via bus.
Transformer disconnection testing circuit in the described current sampling circuit 7 is formed by connecting by analog selection switch CD4052, amplifier LM358, photoelectrical coupler NEC2701, transistor and Resistor-Capacitor Unit, and transformer disconnection testing circuit and four zero-sequence transformer connect and compose four tunnel sense channels of surveying electric leakage signals.
Four temperature sensors of temperature sampling circuit 6 adopt the PT100 temperature sensitive resister.
Because tested power circuit leakage current is less usually, must adopt highly sensitive high-quality mutual inductor so extract the mutual inductor of electric leakage signal, sensing range is 1 milliampere to several amperes, mutual inductor should have good anti-electromagnetic interference capability, should not exist to produce signal output, produce false alarm because of the various undesired signals in the external world.The mutual inductor that the utility model is selected for use can reach this requirement fully.
The signal that mutual inductor extracts is transported to current sampling circuit 7, amplification correction through current sampling circuit 7 sends signal to host CPU 1 again, and host CPU 1 extracts real electric leakage data, and judge and data storage, then information is uploaded to host computer by RS485 communicating circuit 8.Can realize like this disperseing monitoring, the electric fire monitoring system of concentrated alarm.
Transformer disconnection testing circuit in the host CPU 1 Control current sample circuit 7, whether detect 4 tunnel mutual inductor successively breaks, by the Ohm law principle, gather the whether disconnection signal of mutual inductor, being translated into electric signal flows to host CPU 1 again and judges, report to the police by host CPU 1 control charactron pilot lamp control circuit 5 and sound control circuit 3, and judge and data storage, host CPU 1 pilot relay control circuit 9, then signal data is uploaded to host computer by RS485 communicating circuit 8, thereby has realized monitoring temperature.
Host CPU 1 receives user's setting and instruction by button sample circuit 4, thereby determines oneself various parameters and address, and then response and own relevant communication instruction.
The communication instruction that host computer sends, received by RS485 communicating circuit 8,, the signal after handling is delivered to host CPU 1 through the processing of RS485 communicating circuit 8, reacted according to current data cases by host CPU 1, the data of reaction send on the bus by RS485 communicating circuit 8 again.
Transformer disconnection testing circuit as shown in Figure 2, the AU pin of host CPU 1 connects resistance R H8, and the other end of resistance R H8 connects the base stage of triode QH4.The grounded emitter of triode QH4, triode QH4 collector connect resistance R H3 and integrated circuit U6(CD4052) 10 pin.The other end of resistance R H3 connects the 5V power supply.The BU pin of host CPU 1 connects resistance R H7, and the other end of resistance R H7 connects the base stage of triode QH3.The grounded emitter of triode QH3, collector connects 9 pin of resistance R H1 and integrated circuit U6.The other end of resistance R H1 connects the 5V power supply.The ANH1U pin of host CPU 1 connects resistance R H6, and the other end of resistance R H6 connects the base stage of triode QH2.The grounded emitter of triode QH2, collector connects 6 pin of resistance R H4 and integrated circuit U6.The other end of resistance R H4 connects the 5V power supply.3,7, the 9 pin ground connection of integrated circuit U6.16 pin of integrated circuit U6 connect the 5V power supply.12 pin of integrated circuit U6 connect 1 pin of resistance R J1, capacitor C C17 and terminal JZ7.The other end of resistance R J1 connects the 5V power supply.
2 pin of the other end splicing ear JZ7 of capacitor C C17 and 1 pin of integrated circuit U6.14 pin of integrated circuit U6 connect 1 pin of resistance R J2, capacitor C C18 and terminal JZ8.The other end of resistance R J2 connects the 5V power supply.
2 pin of the other end splicing ear JZ8 of capacitor C C18 and 5 pin of integrated circuit U6.15 pin of integrated circuit U6 connect 1 pin of resistance R J3, capacitor C C19 and terminal JZ9.The other end of resistance R J3 connects the 5V power supply.
2 pin of the other end splicing ear JZ9 of capacitor C C19 and 2 pin of integrated circuit U6.11 pin of integrated circuit U6 connect 1 pin of resistance R J4, capacitor C C20 and terminal JZ10.The other end of resistance R J4 connects the 5V power supply.
2 pin of the other end splicing ear JZ10 of capacitor C C20 and 4 pin of integrated circuit U6.13 pin of integrated circuit U6 connect resistance R J8 and RJ9.The other end ground connection of resistance R J9.The other end of resistance R J9 connects 3 pin of capacitor C J2 and integrated circuit U7A.The other end ground connection of capacitor C J2.8 pin of integrated circuit U7A connect 5V power supply, 4 pin ground connection.2 pin of integrated circuit U7A connect resistance R J10, RJ11 and capacitor C J1.The other end of resistance R J11 connects the 5V power supply.The other end ground connection of resistance R J10 and capacitor C J1.1 pin of integrated circuit U7A connects resistance R J12.The other end of resistance R J12 connects 1 pin of optocoupler U9.The 2 pin ground connection of optocoupler U9,3 pin ground connection, 4 pin connect the CTJC pin of resistance R H9 and host CPU 1.The other end of resistance R H9 connects the 5V power supply.Its concrete principle of work is: host CPU 1 is reverse by triode, the sheet choosing of drive integrated circult U6.The output input pin of integrated circuit U6 is divided into 4 groups: i.e. 12 pin, 1 pin; 14 pin, 5 pin; 15 pin, 2 pin; 11 pin, 4 pin.Host CPU 1 is reverse by two triodes, and 9,10 pin of control integrated circuit U6 produce digital signal, thus make 3 pin, 13 pin successively with 4 groups of input pin conductings.When external mutual inductor just often, 2 pin of terminal obtain low level signal, simultaneously 1 pin of terminal also obtains low level signal.13 pin of integrated circuit U6 have just obtained low level signal like this.And when external transformer disconnection, terminal 2 pin obtain low level signal, and 1 pin of terminal has obtained high level signal, thereby 13 pin of integrated circuit U6 have obtained high level signal.So just distinguished the normal and broken string state of external mutual inductor.The signal that integrated circuit U6 obtains passes through comparer U7A(LM358 again) comparison and isolate optocoupler U9(NEC2701) processing, make host CPU 1 obtain the signal whether mutual inductor breaks.
According to the above description, can reproduce the technical solution of the utility model in conjunction with art technology.
Claims (3)
1. one kind leaks electricity and the monitoring temperature detector, it is characterized in that: main circuit is made of host CPU (1), power circuit (2), sound control circuit (3), button sample circuit (4), charactron pilot lamp control circuit (5), temperature sampling circuit (6), current sampling circuit (7), RS485 communicating circuit (8) and control relay circuit (9); Described power circuit (2), sound control circuit (3), button sample circuit (4), charactron pilot lamp control circuit (5), temperature sampling circuit (6), current sampling circuit (7), RS485 communicating circuit (8), control relay circuit (9) are connected with host CPU (1) respectively, temperature sampling circuit (6) comprises four temperature sensors, current sampling circuit (7) comprises four zero-sequence transformer and the transformer disconnection testing circuit that is connected with four zero-sequence transformer, and the RS485 communicating circuit connects host computer via bus.
2. leak electricity according to claim 1 and the monitoring temperature detector, it is characterized in that: the transformer disconnection testing circuit in the described current sampling circuit (7) is formed by connecting by analog selection switch CD4052, amplifier LM358, photoelectrical coupler NEC2701, transistor and Resistor-Capacitor Unit, and transformer disconnection testing circuit and four zero-sequence transformer connect and compose four tunnel sense channels of surveying electric leakage signals.
3. leak electricity according to claim 1 and the monitoring temperature detector, it is characterized in that: four temperature sensors of temperature sampling circuit (6) adopt the PT100 temperature sensitive resisters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205349251U CN201796459U (en) | 2010-09-19 | 2010-09-19 | Electric leakage and temperature monitoring detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205349251U CN201796459U (en) | 2010-09-19 | 2010-09-19 | Electric leakage and temperature monitoring detector |
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| Publication Number | Publication Date |
|---|---|
| CN201796459U true CN201796459U (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205349251U Expired - Fee Related CN201796459U (en) | 2010-09-19 | 2010-09-19 | Electric leakage and temperature monitoring detector |
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| Country | Link |
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| CN (1) | CN201796459U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413394A (en) * | 2013-02-06 | 2013-11-27 | 陕西富集电力科技股份有限公司 | Fire protection detection device |
| CN103776973A (en) * | 2014-03-04 | 2014-05-07 | 中山大学 | Electrical fire short circuit simulator and simulation method thereof |
| CN104537789A (en) * | 2014-12-31 | 2015-04-22 | 凯明威(天津)电气设备科技有限公司 | Electrical fire monitoring and detecting device with fire smoke detection and alarm function |
| CN105445595A (en) * | 2014-08-12 | 2016-03-30 | 无锡蓝天电子有限公司 | Fire disaster monitoring detecting device |
| CN107741552A (en) * | 2017-09-29 | 2018-02-27 | 吴文丽 | A kind of intelligent grid fire wall over the ground |
-
2010
- 2010-09-19 CN CN2010205349251U patent/CN201796459U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413394A (en) * | 2013-02-06 | 2013-11-27 | 陕西富集电力科技股份有限公司 | Fire protection detection device |
| CN103776973A (en) * | 2014-03-04 | 2014-05-07 | 中山大学 | Electrical fire short circuit simulator and simulation method thereof |
| CN105445595A (en) * | 2014-08-12 | 2016-03-30 | 无锡蓝天电子有限公司 | Fire disaster monitoring detecting device |
| CN105445595B (en) * | 2014-08-12 | 2018-05-11 | 无锡蓝天电子股份有限公司 | A kind of fire hazard monitoring detection device |
| CN104537789A (en) * | 2014-12-31 | 2015-04-22 | 凯明威(天津)电气设备科技有限公司 | Electrical fire monitoring and detecting device with fire smoke detection and alarm function |
| CN107741552A (en) * | 2017-09-29 | 2018-02-27 | 吴文丽 | A kind of intelligent grid fire wall over the ground |
| CN107741552B (en) * | 2017-09-29 | 2018-08-31 | 湖南万护科技发展有限公司 | A kind of intelligent grid fire wall over the ground |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20150919 |
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| EXPY | Termination of patent right or utility model |