CN201369083Y - Electrical fire monitoring detector - Google Patents

Electrical fire monitoring detector Download PDF

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Publication number
CN201369083Y
CN201369083Y CNU2009200960903U CN200920096090U CN201369083Y CN 201369083 Y CN201369083 Y CN 201369083Y CN U2009200960903 U CNU2009200960903 U CN U2009200960903U CN 200920096090 U CN200920096090 U CN 200920096090U CN 201369083 Y CN201369083 Y CN 201369083Y
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CN
China
Prior art keywords
detector
circuit
master controller
temperature
electric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CNU2009200960903U
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Chinese (zh)
Inventor
娄建琴
陈红群
苏静
伏中科
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Wingoal Tianjin Electric Equipment Co Ltd
Original Assignee
Schneider Wingoal Tianjin Electric Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CNU2009200960903U priority Critical patent/CN201369083Y/en
Application granted granted Critical
Publication of CN201369083Y publication Critical patent/CN201369083Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses an electric fire monitoring detector which comprises a main controller, a power supply circuit, an RS485 communication interface circuit, a dial switch signal sampling circuit, a temperature signal acquisition circuit and a creepage signal sampling circuit. The electrical fire monitoring detector is connected with superior monitoring equipment through a communication circuit to be used as a terminal detector to form an integral electrical fire monitoring system. The monitoring detector is capable of dispersing and collecting at the real time the electrical fire-sensitive parameters of creepage and environment temperature and immediately sending alarm signals to the superior monitoring equipment once the creepage value of the device and the circuitry is bigger than the set creepate value or the environment temperature value is bigger than the set temperature value. Therefore, the electrical fire monitoring detector can effectively prevent electrical fire caused by various creepage reasons. In addition, the detector has the advantages of reasonable design, convenient installation and usage, high sensitivity, high safety and reliability and long communication distance.

Description

Detector for electric fire protection
Technical field
The utility model belongs to electronics and electromagnetic technology field, particularly relates to a kind of detector for electric fire protection that is used to monitor the electrical fire that causes because of electric leakage.
Background technology
At present, exist the hidden danger of fire in industry and the folk power supply system always and be accompanied by the generation of disaster, it is threatening human safety of life and property constantly, becomes one of major disaster that influences human ordinary production and existence therefrom.Along with progress of science and technology and growth in the living standard, consuming device and power consumption all grow with each passing day, and have also brought the increase of electrical fire thereupon, so electrical fire has become one of the factor of mainly catching fire in the domestic in recent years emphasis fire.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, wherein the fire that causes by leaking electricity, transshipping is than had more disguise by fire former thereby that cause such as short circuits, normally take place stealthily, and also be difficult to after catching fire find out real reason (being covered by illusions such as short circuits usually), so its harmfulness is also just bigger.Be commonly used in the method that leakage current protection device or electric fire alarm device are installed in the electric wiring at present and come the safety of the protection equipment and the person.Wherein there is following point in the leakage current protection device: this device has only the passive circuit of cutting off the electricity supply of ability when the leakage current in the load circuit surpasses the situation of specified leakage current setting value; guarantee Electrical Safety with this; but it can not play prevention in advance to the fire that is caused by electric electric leakage; and when leakage current surpasses specified leakage current setting value, just cut off the electricity supply and to be unfavorable for the electrical stability of using of whole unit; and only be applicable to the consumer terminal protection, therefore and be not suitable for the protection of whole using electricity system.The control circuit that the electric fire alarm device generally includes current transformer, isolating switch and links to each other with the output terminal of the control input end of isolating switch and current transformer.Its principle of work is that the electric current that utilizes above-mentioned control circuit to monitor with electric line via current transformer changes, thereby determine whether there are faults such as the electric leakage that can cause electrical fire, short circuit, overload with electric line, as existing, control circuit will send control signal so that isolating switch is disconnected, thereby make the electricity consumption line broken circuit that has electric fault, and send alerting signal, and carrying out inspection and maintenance to remind the staff, electric disaster hidden-trouble is eliminated in bud the most at last.But, this electric fire alarm device can only use separately as product independently, and can't use with Related product fire products such as (as:) fire alarm control units networking, therefore to a certain degree, limited further prevention and control, thereby can't fundamentally stop electrical fire electrical fire.In addition, fire can cause usually when taking place that local ambient temperature raises in the buildings, but above-mentioned leakage current protection device and electric fire alarm device all can not be monitored this environment temperature.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of and can monitors in real time environment temperature in leakage current and the buildings simultaneously, and can be with the detector for electric fire protection of Related product networking use.
In order to achieve the above object, the detector for electric fire protection that provides of the utility model comprises:
Master controller is responsible for the processing and the transmission of data and instruction;
Power circuit, an end links to each other with the 24V direct supply, and other parts join in the other end and the detector, for whole detector provides direct supply;
RS485 communication interface circuit, an end links to each other with master controller, and the other end joins by RS485 bus and upper monitoring equipment, is used for the communication between master controller and the upper monitoring equipment;
The toggle switch signal sample circuit, an end links to each other with master controller, is used to be provided with address, determines the address of detector by the state that toggle switch is set, and then responds the communication command relevant with this detector;
Temperature signal collection circuit, an end links to each other with master controller, and the other end and No. 5 temperature sensors join, and are used for being delivered to master controller after the detected processes temperature signal of No. 5 temperature sensors;
The electric leakage signal sample circuit, an end links to each other with master controller, and the other end and zero-sequence transformer are joined, and are used for being delivered to master controller after the detected electric leakage signal processing of zero-sequence transformer.
Described master controller adopts the PIC18F2423 chip.
Described temperature signal collection circuit is made up of gating circuit, on-off circuit, pulse input circuit and output circuit, adopts CD4017, Si9956 or LM358 chip.
Described temperature sensor is the PT100 temperature sensitive resister.
The detector for electric fire protection that the utility model provides is to link to each other with upper monitoring equipment by communicating circuit, forms complete electric fire monitoring system as the end-probing device.It can disperse and gather electrical fire sensitive parameters such as electric leakage, environment temperature in real time, and when the electrical leakage of circuit and equipment greater than setting value or environment temperature greater than setting value after the time transmit alerting signal to upper watch-dog immediately, therefore can effectively prevent electrical fire accident former because of various electric leakages thereby that cause.In addition, but this detector also has advantages such as reasonable in design, easy to install, highly sensitive, safe and reliable and communication distance are long.
Description of drawings
Fig. 1 constitutes block diagram for the detector for electric fire protection that the utility model provides.
Fig. 2 is temperature sampling circuit schematic diagram in the detector for electric fire protection shown in Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments the detector for electric fire protection that the utility model provides is elaborated.
As depicted in figs. 1 and 2, the detector for electric fire protection that provides of the utility model comprises:
Master controller 1 is responsible for the processing and the transmission of data and instruction;
Power circuit 2, one ends link to each other with the 24V direct supply, and other parts join in the other end and the detector, for whole detector provides direct supply;
RS485 communication interface circuit 3, one ends link to each other with master controller 1, and the other end joins by RS485 bus and upper monitoring equipment, are used for the communication between master controller 1 and the upper monitoring equipment;
Toggle switch signal sample circuit 4, one ends link to each other with master controller 1, are used to be provided with address, determine the address of detector by the state that toggle switch is set, and then respond the communication command relevant with this detector;
Temperature signal collection circuit 5, one ends link to each other with master controller 1, and the other end and No. 5 temperature sensors 7 join, and are used for being delivered to master controller 1 after No. 5 temperature sensors 7 detected processes temperature signal;
Electric leakage signal sample circuit 6, one ends link to each other with master controller 1, and the other end and zero-sequence transformer 8 are joined, and are used for being delivered to master controller 1 after the zero-sequence transformer 8 detected electric leakage signals processing.
Described master controller 1 adopts the PIC18F2423 chip.
Described temperature signal collection circuit 5 is made up of gating circuit, on-off circuit, pulse input circuit and output circuit, adopts CD4017, Si9956 or LM358 chip.
Described temperature sensor 7 is the PT100 temperature sensitive resister.
As shown in Figure 2, the CLK pin in the described gating circuit is connected on the master controller 1, and Be Controlled is communicated with field effect transistor 1Q3a, 1Q3b, 1Q2a, 1Q2b, 1Q1b successively.The signal of power supply processing circuit 2 outputs is through the processing of reference source 1U2.Reference source 1U2 connects resistance 1R7 ground connection, and in parallel with comparer 1U1A.The output of comparer 1U1A connects field effect transistor 1Q1a.Field effect transistor 1Q1a connects the output terminal and the amplifier 1U1B of gating circuit.The output of amplifier 1U1B is acquired signal.Concrete principle of work is: power supply processing circuit 2 output+9V and+5V signal, and as the power supply of this circuit.Master controller 1 is by CLK port input pulse signal, control field effect transistor 1Q1b, 1Q2,1Q3,5 socket 1J1, the 1J2,1J3,1J4, the 1J5 that link to each other with No. 5 temperature sensors 7 of gating successively.This device utilizes the principle of thermal resistance and adopts the method for constant current sampling, and the temperature signal that temperature sensor 7 is detected changes resistance variations earlier into, and then is converted into voltage signal.One group of port of use amplifier 1U1 is device 1U1A as a comparison, re-uses another group port as amplifier 1U1B.The signal of temperature sensor 7 at first compares by comparer 1U1A and reference source 1U2, and the signal that obtains amplifies back output by amplifier 1U1B again.The voltage signal that obtains at last sends back master controller 1 at the GT end and analyzes.
In addition, because leakage current is less usually, should adopt highly sensitive high-quality mutual inductor so be used to detect the zero-sequence transformer 8 of electric leakage signal, sensing range is that 1mA arrives several amperes, and should have good anti-electromagnetic interference capability, should not produce signal output, thereby produce false alarm because of there being extraneous various undesired signals.
When the detector for electric fire protection that the utility model provides is installed, at first No. 5 temperature sensors 7 being separately positioned on needs monitoring of environmental temperature place (No. 5 temperature sensors 7 can be measured the environment temperature of A phase, B phase, C phase and N line cable temperature and device external simultaneously), simultaneously monitored circuit is passed zero-sequence transformer 8.Gating circuit during operation in the master controller 1 control temperature signal collection circuit 5, be communicated with No. 5 temperature sensors 7 successively, the variation of ambient temperature of coming collecting temperature sensor 7 to sense by the constant current sampling principle, and be translated into electric signal, flow to master controller 1 again and calculate, extract real temperature data, and judge and deposit by master controller 1, then information is uploaded to upper monitoring equipment by communicating circuit 3 through bus, thereby realizes monitoring environment temperature.Meanwhile, master controller 1 control zero-sequence transformer 8 is transported to electric leakage sample circuit 6 with the signal that detects, and the amplification correction through electric leakage sample circuit 6 is sent to signal master controller 1 again; Master controller 1 extracts real electric leakage data again, and judges and deposit, and then this information is uploaded to upper monitoring equipment by communicating circuit 3 through bus, thereby realizes the monitoring to leakage current.After the electrical leakage on zero-sequence transformer 8 detected circuits and the equipment is greater than the leakage-current alarm value of setting, or behind the environment temperature alarming value of No. 5 temperature sensors 7 detected environment temperatures greater than setting, master controller 1 is uploaded alarm immediately.
In addition, communicating circuit 3 can also be received the communication instruction that is sent by upper monitoring equipment by bus interface, after communicating circuit 3 processing, this signal is resent to master controller 1, reacted according to current data cases by master controller 1, the data of reaction send it back upper monitoring equipment by communicating circuit 3 through bus again.

Claims (4)

1, a kind of detector for electric fire protection is characterized in that: described detector for electric fire protection comprises:
Master controller (1) is responsible for the processing and the transmission of data and instruction;
Power circuit (2), an end links to each other with the 24V direct supply, and other parts join in the other end and the detector, for whole detector provides direct supply;
RS485 communication interface circuit (3), an end links to each other with master controller (1), and the other end joins by RS485 bus and upper monitoring equipment, is used for the communication between master controller (1) and the upper monitoring equipment;
Toggle switch signal sample circuit (4), an end links to each other with master controller (1), is used to be provided with address, determines the address of detector by the state that toggle switch is set, and then responds the communication command relevant with this detector;
Temperature signal collection circuit (5), an end links to each other with master controller (1), and the other end and No. 5 temperature sensors (7) join, and are used for being delivered to master controller (1) after the detected processes temperature signal of No. 5 temperature sensors (7);
Electric leakage signal sample circuit (6), an end links to each other with master controller (1), and the other end and zero-sequence transformer (8) are joined, and are used for being delivered to master controller (1) after the detected electric leakage signal processing of zero-sequence transformer (8).
2, detector for electric fire protection according to claim 1 is characterized in that: described master controller (1) adopts the PIC18F2423 chip.
3, detector for electric fire protection according to claim 1 is characterized in that: described temperature signal collection circuit (5) is made up of gating circuit, on-off circuit, pulse input circuit and output circuit, adopts CD4017, Si9956 or LM358 chip.
4, detector for electric fire protection according to claim 1 is characterized in that: described temperature sensor (7) is the PT100 temperature sensitive resister.
CNU2009200960903U 2009-03-30 2009-03-30 Electrical fire monitoring detector Expired - Lifetime CN201369083Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2009200960903U CN201369083Y (en) 2009-03-30 2009-03-30 Electrical fire monitoring detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2009200960903U CN201369083Y (en) 2009-03-30 2009-03-30 Electrical fire monitoring detector

Publications (1)

Publication Number Publication Date
CN201369083Y true CN201369083Y (en) 2009-12-23

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CNU2009200960903U Expired - Lifetime CN201369083Y (en) 2009-03-30 2009-03-30 Electrical fire monitoring detector

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102163357A (en) * 2011-01-18 2011-08-24 盛隆电气集团有限公司 Electric fire monitoring detector with pluggable signal acquiring card
CN103400465A (en) * 2013-08-15 2013-11-20 天津卓朗科技发展有限公司 Multifunctional and highly integrated fire safety precaution emergency system device
CN103685565A (en) * 2013-12-24 2014-03-26 施耐德万高(天津)电气设备有限公司 Intelligent control CAN-bus (Controller Area Network) electric fire monitoring system
CN104835281A (en) * 2015-05-29 2015-08-12 张释文 Electric leakage fire monitoring device
CN105654651A (en) * 2016-03-28 2016-06-08 成都振中电气有限公司 Electrical fire monitoring system
CN110060445A (en) * 2019-05-20 2019-07-26 北京航天常兴科技发展股份有限公司 Prevent the method and detector for electric fire protection, monitoring system of electric leakage false alarm

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102163357A (en) * 2011-01-18 2011-08-24 盛隆电气集团有限公司 Electric fire monitoring detector with pluggable signal acquiring card
CN102163357B (en) * 2011-01-18 2013-02-27 盛隆电气集团有限公司 Electric fire monitoring detector with pluggable signal acquiring card
CN103400465A (en) * 2013-08-15 2013-11-20 天津卓朗科技发展有限公司 Multifunctional and highly integrated fire safety precaution emergency system device
CN103400465B (en) * 2013-08-15 2016-03-30 天津卓朗科技发展有限公司 The security against fire alarm emergency system and device that a kind of multi-functional height is integrated
CN103685565A (en) * 2013-12-24 2014-03-26 施耐德万高(天津)电气设备有限公司 Intelligent control CAN-bus (Controller Area Network) electric fire monitoring system
CN104835281A (en) * 2015-05-29 2015-08-12 张释文 Electric leakage fire monitoring device
CN105654651A (en) * 2016-03-28 2016-06-08 成都振中电气有限公司 Electrical fire monitoring system
CN110060445A (en) * 2019-05-20 2019-07-26 北京航天常兴科技发展股份有限公司 Prevent the method and detector for electric fire protection, monitoring system of electric leakage false alarm

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Granted publication date: 20091223

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