CN104867264A - Fire early-warning method and system - Google Patents
Fire early-warning method and system Download PDFInfo
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- CN104867264A CN104867264A CN201410067478.6A CN201410067478A CN104867264A CN 104867264 A CN104867264 A CN 104867264A CN 201410067478 A CN201410067478 A CN 201410067478A CN 104867264 A CN104867264 A CN 104867264A
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- fire
- formula heat
- heat detector
- cable formula
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
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- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
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- Alarm Systems (AREA)
Abstract
The invention discloses a fire early-warning method and a fire early-warning system. The fire early-warning system comprises N groups of cable type temperature-sensing detectors (1), N groups of microcomputer modulators (2) and a fire early-warning center (3), wherein the N groups of microcomputer modulators (2) are connected in a same loop in series; the N groups of cable type temperature-sensing detectors (1) are used for acquiring and representing N groups of impedance signals of ambient temperature conditions in corresponding N fire monitoring areas respectively; the N groups of microcomputer modulators (2) are used for receiving the N groups of impedance signals, determining a fire monitoring area with abnormal ambient temperature among the N fire monitoring areas according to the N groups of impedance signals, generating a fire alarm signal containing positional information of a fire alarm source, and sending the fire alarm signal to the fire early-warning center (3); and the fire early-warning center (3) is used for receiving the fire alarm signal, determining position of the fire monitoring area with abnormal ambient temperature according to the fire alarm signal, and starting spray equipment (4) in the fire monitoring area with abnormal ambient temperature.
Description
Technical field
The present invention relates to fire alarm technical field, more particularly, relate to a kind of fire alarm method and system.
Background technology
In the prior art, the structural design of nuclear power station fire early-warning system is as follows: each fire hazard monitoring region of nuclear power station is equipped with a cable formula heat detector, and each cable formula heat detector in each fire hazard monitoring region is all connected to same fire control device, thus form N number of detection circuit independent of each other.What namely existing nuclear power station fire early-warning system adopted is point-to-point fire alarm mechanism.There is following defect in this fire early-warning system: the arbitrary detection circuit 1) as fire early-warning system breaks down, then this fire early-warning system cannot realize the fire alarm in the fire monitoring region forming this detection circuit, the reliability extreme difference of system; 2) design being only equipped with a cable formula heat detector in each fire hazard monitoring region that this fire early-warning system adopts will inevitably cause higher fire alarm rate of false alarm; 3) this system only comprises a fire control device, and fire alarm treatment effeciency is low, fire alarm emergency mechanism underaction, worse, and as machine fault of delaying appears in this fire control device, then whole fire early-warning system is by paralyzed state, the poor stability of system.Therefore, how to develop the fire early-warning system that a system stability is high, fire alarm rate of false alarm is low and become problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of and has both had higher system stability, effectively can reduce again the fire alarm method and system of fire alarm rate of false alarm.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of fire alarm method, comprise the steps:
S1) the N group impedance signal of the ambient temperature conditions in N number of fire hazard monitoring region corresponding is with it characterized by the collection of N group cable formula heat detector;
S2) by receiving described N group impedance signal respectively with the described N group cable formula heat detector N group microcomputer modulator be serially connected in the same circuit, the fire hazard monitoring region determining environment temperature exception in described N number of fire hazard monitoring region is assessed according to the ambient temperature conditions of described N group impedance signal to described N number of fire hazard monitoring region, generate the fire alarm comprising the positional information in fire alarm source, and described fire alarm is sent to fire alarm center;
S3) by fire alarm described in described fire alarm receive centre, according to the position in the fire hazard monitoring region of described fire alarm determination environment temperature exception, and the sprinkling equipment in the fire hazard monitoring region of described environment temperature exception is opened.
State in fire alarm method on the invention, also comprised the steps: before described step S1
S0) the first current threshold I whether environment temperature for judging described N number of fire hazard monitoring region is abnormal is preset
0, and preset the second whether abnormal current threshold I of duty for judging described N group cable formula heat detector
0', by described first current threshold I
0and described second current threshold I
0' be saved in described N group microcomputer modulator simultaneously.
State in fire alarm method on the invention, described step S2 specifically comprises the steps:
S21) the N group impedance signal gathered by described N group cable formula heat detector is received respectively by described N group microcomputer modulator;
S22) the N group impedance signal received is carried out respectively amplification to process and the one group of current value I(I being converted to the ambient temperature conditions for characterizing described N number of fire hazard monitoring region
1, I
2);
S23) by described current value I(I
1, I
2) with the first current threshold I of prestoring
0compare; As current value I(I as described in judging
1, I
2) in come from one group of current value (I of any one group of cable formula heat detector
m, I
(m+1)) be all not less than described first current threshold I
0, then the fire hazard monitoring region determining residing for described one group of cable formula heat detector is the fire hazard monitoring region of environment temperature exception, and generates the fire alarm comprising the positional information of described one group of cable formula heat detector;
S24) described fire alarm is sent to fire control device corresponding with described one group of cable formula heat detector in described fire alarm in the heart.
State in fire alarm method on the invention, described step S1 also comprises: the resistance value R(R being obtained each termination box of described N group cable formula heat detector by described N group microcomputer modulator respectively
1, R
2), according to described resistance value R(R
1, R
2) calculate one group of actual current value I ' (I of each termination box
1', I
2' ...).
State in fire alarm method on the invention, described step S2 also comprises: by described N group microcomputer modulator respectively by described one group of actual current value I ' (I
1', I
2' ...) the second current threshold I of prestoring with it
0' compare;
As one group of actual current value I ' (I as described in judging
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector
m', I
(m+1)' ...) be 0, then determine that open circuit fault appears in this group cable formula heat detector, generate the open circuit fault signal comprising the positional information of the source of trouble, and described open circuit fault signal is sent to the fire control device corresponding with this group cable formula heat detector;
As one group of actual current value I ' (I as described in judging
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector
m', I
(m+1)' ...) be all not less than described second current threshold I
0', then determine that short trouble appears in this group cable formula heat detector, generate the short circuit fault signal comprising the positional information of the source of trouble, and described short circuit fault signal is sent to the fire control device corresponding with this group cable formula heat detector.
State in fire alarm method on the invention, described step S3 also comprises: received by described fire control device described cable formula heat detector open circuit fault signal or described cable formula heat detector short circuit fault signal, process and show.
The present invention also constructs a kind of fire early-warning system, comprise be separately positioned on N number of fire hazard monitoring region N group cable formula heat detector, be serially connected in the N group microcomputer modulator in the same circuit and communicate to connect with described N group microcomputer modulator and comprise the fire alarm center of at least one fire control device, be formed centrally looped network in described N group microcomputer modulator and described fire alarm, each microcomputer modulator all connects a corresponding with it cable formula heat detector;
Described N group cable formula heat detector is for gathering the N group impedance signal of the ambient temperature conditions in sign N number of fire hazard monitoring region corresponding with it;
Described N group microcomputer modulator is respectively used to receive described N group impedance signal, the fire hazard monitoring region determining environment temperature exception in described N number of fire hazard monitoring region is assessed according to the ambient temperature conditions of described N group impedance signal to described N number of fire hazard monitoring region, generate the fire alarm comprising the positional information in fire alarm source, and described fire alarm is sent to described fire alarm center;
The sprinkling equipment in the fire hazard monitoring region of described environment temperature exception, for receiving described fire alarm, according to the position in the fire hazard monitoring region of described fire alarm determination environment temperature exception, and is opened in described fire alarm center.
State on the invention in fire early-warning system, described fire alarm center comprises and described N group cable formula heat detector and described N group microcomputer modulator N number of fire control device one to one;
The signal acquisition module that each microcomputer modulator includes a MCU, be electrically connected respectively with a described MCU, memory module, signal amplify and modular converter and the first signal transmitting module;
Described memory module stores the first whether abnormal current threshold I of environment temperature for judging described N number of fire hazard monitoring region
0, and whether abnormal the second current threshold I of duty for judging described N group cable formula heat detector
0';
Described signal acquisition module is for gathering the one group of impedance signal detected by corresponding with described microcomputer modulator one group of cable formula heat detector;
One group of impedance signal that described signal amplifies and modular converter is used for being gathered by described acquisition module carries out amplification and processes and the one group of current value (I being converted to the ambient temperature conditions for characterizing the fire hazard monitoring region corresponding to described microcomputer modulator
m, I
(m+1));
A described MCU is used for this group current value (I
m, I
(m+1)) with the first current threshold I of prestoring
0compare; A described MCU is also for judging this group current value (I
m, I
(m+1)) be all not less than described first current threshold I
0time, determine that described fire hazard monitoring region is the fire hazard monitoring region of environment temperature exception, and generate the fire alarm comprising the positional information in fire alarm source;
Described first signal transmitting module is used for the fire control device corresponding with described microcomputer modulator described fire alarm being sent to described fire alarm center;
The 2nd MCU that fire control device described in each includes load module, is electrically connected with described load module; Described load module is for receiving fire alarm, and described 2nd MCU is used for the position according to the fire hazard monitoring region of fire alarm determination environment temperature exception, and the sprinkling equipment controlling the fire hazard monitoring region of described environment temperature exception starts spray operation.
State on the invention in fire early-warning system, described in each, cable formula heat detector includes a termination box; Each microcomputer modulator is also for obtaining the resistance value R(R of each termination box of described N group cable formula heat detector
1, R
2), according to described resistance value R(R
1, R
2) calculate one group of actual current value I ' (I of each termination box
1', I
2' ...), and by this group actual current value I ' (I
1', I
2' ...) the second current threshold I of storing with described memory module
0' compare;
Each microcomputer modulator is also for judging this group actual current value I ' (I by a MCU
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector
m', I
(m+1)' ...) when being 0, determine that open circuit fault appears in this group cable formula heat detector, generate the cable formula heat detector open circuit fault signal comprising the positional information of the source of trouble, and by described first signal transmitting module, described cable formula heat detector open circuit fault signal is sent to the fire control device corresponding with this group cable formula heat detector at described fire alarm center;
Each microcomputer modulator is also for judging this group actual current value I ' (I by a MCU
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector
m', I
(m+1)' ...) be all not less than described second current threshold I
0' time, determine that short trouble appears in this group cable formula heat detector, generate the cable formula heat detector short circuit fault signal comprising the positional information of the source of trouble, and by described first signal transmitting module, described cable formula heat detector short circuit fault signal is sent to the fire control device corresponding with this group cable formula heat detector at described fire alarm center;
Each fire control device also comprises the display screen be electrically connected with described 2nd MCU; Fire control device described in each is also for receiving described cable formula heat detector open circuit fault signal or described cable formula heat detector short circuit fault signal by described load module, extracted the positional information of failure message in described cable formula heat detector open circuit fault signal or described cable formula heat detector short circuit fault signal and the source of trouble by described 2nd MCU, and shown the positional information of described failure message and the described source of trouble by described display screen.
State on the invention in fire early-warning system, each fire control device also comprises a manual sprinkling fire-distinguishing button and a coordinated signals dish;
Each fire control device is also for the pressing signal of described manual sprinkling fire-distinguishing button being detected during by the 2nd MCU, the sprinkling equipment controlling fire hazard monitoring region corresponding with it further by the 2nd MCU starts spray operation;
Described coordinated signals dish is used for breaking down when fire control device, or when system circuit breaks down, receives external force and start spray operation with the sprinkling equipment controlling fire hazard monitoring region corresponding with it.
Implement fire alarm method and system of the present invention, there is following beneficial effect: 1) fire early-warning system of the present invention carries out real-time detection by the N number of cable formula heat detector and the ambient temperature conditions of N number of microcomputerized controller to each fire hazard monitoring region being arranged in each fire hazard monitoring region, according to the fire hazard monitoring region of result of detection determination environment temperature exception, generate the fire alarm comprising fire alarm source location information, and this fire alarm is sent to fire alarm center, fire alarm center is made to send acousto-optic early warning signal according to this fire alarm, and quick position is carried out to the fire hazard monitoring region of environment temperature exception, and the unlatching of the sprinkling equipment in this abnormal fire hazard monitoring region of Long-distance Control, therefore the present invention has the early warning response speed be exceedingly fast, substantially the generation of the fire failure in each fire hazard monitoring region of nuclear power station can be stopped, 2) in fire early-warning system of the present invention, the cable district in each fire hazard monitoring region to be all arranged in parallel two temperature sensing cables with track, when any one microcomputer modulator in each fire hazard monitoring region judge environment temperature that the impedance signal that it collects reflects all meet or exceed report a fire temperature required time, fire alarm will be sent, when all microcomputer modulators in this fire hazard monitoring region are all reported to the police, the sprinkling equipment in this fire hazard monitoring region will start spray operation automatically.Therefore fire early-warning system of the present invention not only reduces fire alarm rate of false alarm, also a saving structure and the maintenance cost of system; 3) fire early-warning system of the present invention provides the fault diagnosis functions of cable formula heat detector.Present system is monitored by the duty of each microcomputer modulator to cable formula heat detector corresponding with it, to judge whether this cable formula heat detector breaks down, the fault-signal comprising the positional information of the source of trouble is generated according to judged result, present system is also by the display screen display failure message of fire control device and the positional information of the source of trouble, so that the damaged condition of nuclear power station operating personnel to each cable formula heat detector in each fire hazard monitoring region is added up, dispose and perform the maintenance of dependent failure cable formula heat detector according to statistics or more change jobs, to lower the operations risks of nuclear power station, 4) in fire early-warning system of the present invention, each fire control device is all equipped with a manual sprinkling fire-distinguishing button and one to reach the coordinated signals dish of antidetonation rank, during as caused automatic early-warning mode failures even of the present invention because of system circuit fault or equipment failure, user starts the sprinkling equipment in the fire hazard monitoring region corresponding with this fire alarm controller by the manual sprinkling fire-distinguishing button on pressing fire alarm controller, break down as a certain fire alarm controller and cannot normally work, user also starts the sprinkling equipment in the fire hazard monitoring region corresponding with this fault fire alarm controller by the coordinated signals dish on this fault fire alarm controller of Non-follow control, 5) interlock power supply all connected by each fire control device of fire early-warning system of the present invention, and by interlock Power supply, and each fire control device is also equipped with reserve battery, and can switch between interlock power supply and reserve battery.When disconnection fault appears in any detection circuit of fire early-warning system of the present invention, system will automatically switch to reserve battery powering mode.When equipment failure appears in any detection circuit of fire early-warning system of the present invention, the work of the equipment of other detection circuit is all unaffected.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the fire early-warning system that present pre-ferred embodiments provides;
Fig. 2 is the structural representation of arbitrary microcomputer modulator of the fire early-warning system shown in Fig. 1;
Fig. 3 is the structural representation of arbitrary fire control device of the fire early-warning system shown in Fig. 1;
Fig. 4 is the process flow diagram of the fire alarm method that present pre-ferred embodiments provides;
Fig. 5 is fault diagnosis and the Fault Locating Method process flow diagram of the cable formula heat detector that present pre-ferred embodiments provides.
Embodiment
In order to solve the high defect of the fire alarm rate of false alarm being applied to the fire early-warning system of nuclear power station existing in prior art, the main innovative point of the present invention is: (1) fire early-warning system of the present invention adopts looped network design, each microcomputer modulator 2 to be serially connected on a loop and to be connected to form a looped network with fire alarm center, and each group cable formula heat detector 2 includes at least two cable formula heat detectors 2; (2) at least two cable formula heat detectors 1 are all arranged in the cable district in each fire hazard monitoring region of nuclear power station; (3) each fire control device 16 is provided with and controls the manual sprinkling fire-distinguishing button of the switch of the sprinkling equipment 4 in fire hazard monitoring region corresponding with it for independent and reach the coordinated signals dish of antidetonation rank.
Have employed looped network design due to fire early-warning system of the present invention and all arrange that in each fire hazard monitoring region at least two comprise the cable formula heat detector 1 of address module and the design of two microcomputer modulators 2, so solve the fire early-warning system poor stability existed in prior art, high and the problem of resource waste that causes thus of early warning rate of false alarm, achieve and improve fire-alarm prediction accuracy rate, shorten the fire alarm response time, the reliability and stability of raising system, and achieve the object of the fault self-diagnosis of cable formula heat detector 1 and the quick position of the source of trouble.
In order to make object of the present invention clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, fire alarm system of the present invention comprise N number of sprinkling equipment 4 of being arranged at N number of fire hazard monitoring region and N group cable formula heat detector 1, the N group microcomputer modulator 2 that is electrically connected respectively with this N group cable formula heat detector 1 and the fire alarm center 3 be electrically connected with this N group microcomputer modulator 2.This fire alarm center 3 comprises and this N group microcomputer modulator 2 and N number of fire hazard monitoring region N number of fire control device 16 one to one.Fire early-warning system of the present invention have employed looped network design, each microcomputer modulator 2 is serially connected on a loop and with fire alarm center and is connected to form a looped network, each microcomputer modulator 2 all connects one group of cable formula heat detector, and each group cable formula heat detector 2 includes at least two cable formula heat detectors 2.The present invention adopts looped network design can guarantee stability and the reliability of system.
This N group cable formula heat detector 1 is all for gathering the N group impedance signal of the ambient temperature conditions in sign N number of fire hazard monitoring region corresponding with it;
This N group microcomputer modulator 2 is respectively used to receive described N group impedance signal, the fire hazard monitoring region determining environment temperature exception in this N number of fire hazard monitoring region is assessed according to the ambient temperature conditions of described N group impedance signal to N number of fire hazard monitoring region, generate the fire alarm comprising the positional information in fire alarm source, and fire alarm is sent to fire alarm center 3;
This fire alarm center 3 is for receiving described fire alarm, according to the position in the fire hazard monitoring region of described fire alarm determination environment temperature exception, and the sprinkling equipment 4 controlling the fire hazard monitoring region of described environment temperature exception starts spray operation until the environment temperature in this fire hazard monitoring region is reduced to normal level, to stop potential disaster hidden-trouble.
In better embodiment of the present invention, each group cable formula heat detector 1 includes two temperature sensing cables that two cable zones run parallel along fire hazard monitoring region are arranged, present system all adopts the design of two temperature sensing cables be arranged in parallel with track along cable district both to ensure that the accuracy rate of the fire alarm of system in each fire hazard monitoring region, again reduces structure and the maintenance cost of system.Fire early-warning system of the present invention is particularly useful for the fire monitoring of nuclear power station.Fire early-warning system of the present invention is also applicable to the fire monitoring in the place that the fire such as power distribution room, factory floor, warehouse take place frequently.Preferably, fire control device 16 of the present invention is: model is FC720, and brand is the fire alarm control unit of Siemens.Microcomputer modulator 2 of the present invention is: model is JTW-LD-SL-D6000A, the microcomputer modulator 2 of pacifying headed by brand.
As shown in Figure 2, in fire early-warning system of the present invention, each microcomputer modulator 2 includes provides the signal acquisition module 5 of input by one group of corresponding with it cable formula heat detector 1, the signal that is electrically connected with this signal acquisition module 5 amplifies and modular converter 6, to amplify with this signal and a MCU7 that modular converter 6 is electrically connected and the memory module 15 be electrically connected respectively with a MCU7 and the first signal transmitting module 8.
This signal acquisition module 5 is for receiving the N group impedance signal of the ambient temperature conditions in the N number of fire hazard monitoring region of the sign inputted by each group of cable formula heat detector 1.This signal amplifies and modular converter 6 processes for this N group impedance signal is carried out amplification and is converted to one group of current value I(I
1, I
2).This memory module 15 stores the first whether abnormal current threshold I of environment temperature for judging each fire hazard monitoring region
0.One MCU7 is used for this group current value I(I
1, I
2) this first current threshold I
0compare one by one.As a MCU7 judges this group current value I(I
1, I
2) in come from one group of current value I(I of any one group of cable formula heat detector 2
m, I
m+1) be all not less than this first current threshold I
0, then a MCU7 determines that the fire hazard monitoring region at one group of above-mentioned cable formula heat detector 1 place is the fire hazard monitoring region of environment temperature exception, generates the fire alarm comprising the positional information of this group cable formula heat detector 1.This first signal transmitting module 8 sends instruction for the fire alarm receiving a MCU7, this fire alarm is sent to fire control device 16 corresponding with this group cable formula heat detector 1 in fire alarm center 3.
Wherein, the amplification of this signal and modular converter 6 can be existing amplifying circuit and analog-to-digital conversion module.
As shown in Figure 3, each fire control device 16 at fire alarm center 3 includes load module 9, the 2nd MCU10 be electrically connected with this load module 9, the secondary signal sending module 11, display screen 13, alarming horn 14 and the warning light 12 that are electrically connected respectively with the 2nd MCU10.This load module 9 is for receiving the fire alarm from N group microcomputer modulator 2.One MCU7 is for receiving this fire alarm and the positional information of the fire alarm information extracted in this fire alarm and cable formula heat detector 1, fire alarm information is sent to display screen 13 to show, and pass through the position in the fire hazard monitoring region of the positional information determination environment temperature exception of this cable formula heat detector 1, send startup control signal by secondary signal sending module 11 to the sprinkling equipment 4 under the fire hazard monitoring region of this environment temperature exception, make sprinkling equipment start spray operation to lower the temperature to the fire hazard monitoring region of environment temperature exception.When one MCU7 is also for receiving above-mentioned fire alarm, send startup control signal respectively to alarming horn 14 and warning light 12.When alarming horn 14 and warning light 12 receive and start control signal, send default alarm voice respectively and send the red light of flicker, to carry out effective early warning to nuclear power station operating personnel.
Above-mentioned each fire control device 16 access interlock power supply, powered by interlock power supply, and each fire control device 16 is also equipped with reserve battery, and can switch between interlock power supply and reserve battery, cause the work of fire control device 16 to pause to avoid the unexpected power-off of interlock power supply.
Each above-mentioned fire control device 16 also comprises the coordinated signals dish that a manual sprinkling fire-distinguishing button and can reach antidetonation rank.When the fire alarm automatic mode of fire early-warning system of the present invention lost efficacy, user started the sprinkling equipment 4 corresponding with this fire control device 16 by the manual sprinkling fire-distinguishing button on pressing fire control device 16.When fire control device 16 power-off or when breaking down, the sprinkling equipment 4 that user also controls the fire hazard monitoring region corresponding with this fault fire control device 16 by the coordinated signals dish on this fire control device 16 of Non-follow control starts to spray and operates, to lower the temperature to the environment temperature in this fire hazard monitoring region.
Described coordinated signals dish is used for breaking down when described fire control device 16, or when system circuit breaks down, starts the sprinkling equipment 4 in fire hazard monitoring region corresponding with it under external force.
The output terminal at fire alarm center 3 connects KIT system and KSA system.When fire alarm receive centre is to when coming from the fire alarm in a certain fire hazard monitoring region, this fire alarm can be forwarded to KIT system and KSA system, to be reported to the police by KIT system and KSA system.
For better embodiment of the present invention, the idiographic flow of fire alarm method of the present invention will be described below:
As shown in Figure 4, in the step s 100, the operating personnel of nuclear power station preset the first whether abnormal current threshold I of environment temperature for judging each fire hazard monitoring region respectively in each microcomputer modulator 2
0, and by this first current threshold I
0be saved in the memory module 15 of each microcomputer modulator 2.
In step s 200, by being arranged on one group of cable formula heat detector 1(, two cable formula heat detectors in each fire hazard monitoring region) collect two groups of impedance signals for characterizing two groups of impedance signals of the ambient temperature conditions in the fire hazard monitoring region at its place, and are sent to it corresponding microcomputer modulator 2 by Real-time Collection.
In step S300, each microcomputer modulator 2 all gathers the N group impedance signal inputted by N group cable formula heat detector 1 by signal acquisition module 5, amplified and modular converter 6 carries out amplification to this N group impedance signal and processes and be converted to one group of current value I(I by signal
1i
2) and pass through a MCU7 by this group current value I(I
1i
2) the first current threshold I of prestoring with memory module 15
0compare one by one.
In step S400, as a MCU7 judges this group current value I(I
1i
2) in come from one group of current value I(I of any one group of cable formula heat detector 1
m, I
m+1) all lower than the first current threshold I
0, then step S200 is forwarded to.
In step S400, as a MCU7 judges this group current value I(I
1i
2) in come from one group of current value I(I of any one group of cable formula heat detector 1
m, I
m+1) be all not less than the first current threshold I
0, then step S500 is forwarded to.
In step S500, one MCU7 determines that the fire hazard monitoring region at one group of above-mentioned cable formula heat detector 1 place is the fire hazard monitoring region of environment temperature exception, generate the fire alarm comprising the positional information of this group cable formula heat detector 1, and by the first signal transmitting module 8, this fire alarm is sent to fire control device 16 corresponding with this group cable formula heat detector 1 in fire alarm center 3.
In step S600, fire control device 16 corresponding with the microcomputer modulator 2 of this generation fire alarm in fire alarm center 3 receives fire alarm by load module 9, the positional information of the cable formula heat detector 1 that this fire alarm comprises is extracted to determine the position in the fire hazard monitoring region (i.e. the fire hazard monitoring region of environment temperature exception) at this cable formula heat detector 1 place by the 2nd MCU10, the control signal starting spray is sent to the sprinkling equipment 4 under this fire hazard monitoring region, operate with the spray of this sprinkling equipment 4 of remote activation, to be reduced the environment temperature in the fire hazard monitoring region of this environment temperature exception by this sprinkling equipment 4.When the environment temperature in this fire hazard monitoring region is reduced to normal temperature, this fire control device 16 sends closing control signal to this sprinkling equipment 4, makes this sprinkling equipment 4 stop spray work.
Fire early-warning system of the present invention also possesses fault diagnosis and the fault location function of cable formula heat detector 1.Be described for the method for better embodiment of the present invention to cable formula heat detector 1 fault diagnosis of the present invention and localization of fault below:
As shown in Figure 5, in step S100 ', the operating personnel of nuclear power station preset respectively for judging the second current threshold the I whether each group of cable formula heat detector 1 in each fire hazard monitoring region breaks down in each microcomputer modulator 2
0', and by this second current threshold I
0' be saved in the memory module 15 of each microcomputer modulator 2.
In step S200 ', each microcomputer modulator 2 gathers the resistance value R(R of each termination box of each group of cable formula heat detector 1
1, R
2).
In step S300 ', a MCU7 of each microcomputer modulator 2 is by the resistance value R(R of each termination box above-mentioned
1, R
2) calculate one group of actual current value I ' (I of each termination box
1', I
2' ...), and by this group actual current value I ' (I
1', I
2' ...) with the second current threshold I of prestoring
0' compare one by one.
In step S400 ', a MCU7 obtains this group actual current value I ' (I
1', I
2' ...) in each current value be all less than current threshold I
0' comparative result, then a MCU7 judges that the duty of each group of cable formula heat detector 1 is normal.
As in step S400 ', a MCU7 judges this group actual current value I ' (I
1', I
2' ...) in come from one group of current value (I of one group of termination box of any one group of cable formula heat detector
m', I
(m+1)' ...) all lower than current threshold I
0'.
Then in step S500 ', one MCU7 judges that short trouble appears in one group of above-mentioned cable formula heat detector 1, generate the cable formula heat detector short circuit fault signal comprising the positional information (i.e. the positional information of this group cable formula heat detector 1) of the source of trouble, and cable formula heat detector short circuit fault signal is sent to fire alarm center 3.
As in step SS400 ', a MCU7 judges this group actual current value I ' (I
1', I
2' ...) in come from one group of current value (I of one group of termination box of any one group of cable formula heat detector
m', I
(m+1)' ...) be 0.
Then in step S500 ', one MCU7 judges that open circuit fault appears in one group of above-mentioned cable formula heat detector 1, generate the cable formula heat detector open circuit fault signal comprising the positional information (i.e. the positional information of these two cable formula heat detectors 1) of the source of trouble, and this cable formula heat detector open circuit fault signal is sent to fire control device 16 corresponding with this group cable formula heat detector 1 in fire alarm center 3.
In step S600 ', the fire control device 16 at fire alarm center 3 receives cable formula heat detection short circuit fault signal or cable formula heat detection open circuit fault signal by load module 9, source of trouble positional information and the failure message of this cable formula heat detection short circuit fault signal or cable formula heat detection open circuit fault signal is extracted by the 2nd MCU10, and show this source of trouble positional information and failure message by display screen 13, so that the aging or damaged condition of nuclear power station operating personnel to the cable formula heat detector 1 in each fire hazard monitoring region is added up, dispose according to statistics and perform the maintenance of cable formula heat detector 1 or more change jobs, to lower the operations risks of nuclear power station.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a fire alarm method, is characterized in that, comprises the steps:
S1) the N group impedance signal of the ambient temperature conditions in N number of fire hazard monitoring region corresponding is with it characterized by N group cable formula heat detector (1) collection;
S2) by with described N group cable formula heat detector (1) one to one N group microcomputer modulator (2) receive described N group impedance signal respectively, the fire hazard monitoring region determining environment temperature exception in described N number of fire hazard monitoring region is assessed according to the ambient temperature conditions of described N group impedance signal to described N number of fire hazard monitoring region, generate the fire alarm comprising the positional information in fire alarm source, and described fire alarm is sent to fire alarm center (3);
S3) receive described fire alarm by described fire alarm center (3), according to the position in the fire hazard monitoring region of described fire alarm determination environment temperature exception, and open the sprinkling equipment (4) in the fire hazard monitoring region of described environment temperature exception.
2. fire alarm method according to claim 1, is characterized in that, also comprises the steps: before described step S1
S0) the first current threshold (I whether environment temperature for judging described N number of fire hazard monitoring region is abnormal is preset
0), and preset the second whether abnormal current threshold (I of duty for judging described N group cable formula heat detector (1)
0'), by described first current threshold (I
0) and described second current threshold (I
0') be saved in described N group microcomputer modulator (2) simultaneously.
3. fire alarm method according to claim 1, is characterized in that, described step S2 specifically comprises the steps:
S21) the N group impedance signal gathered by described N group cable formula heat detector (1) is received respectively by described N group microcomputer modulator (2);
S22) the N group impedance signal received is carried out respectively amplification to process and the one group of current value I(I being converted to the ambient temperature conditions for characterizing described N number of fire hazard monitoring region
1, I
2);
S23) by described current value I(I
1, I
2) with the first current threshold (I of prestoring
0) compare; As current value I(I as described in judging
1, I
2) in come from one group of current value (I of any one group of cable formula heat detector (1)
m, I
(m+1)) be all not less than described first current threshold (I
0), then the fire hazard monitoring region determining residing for described one group of cable formula heat detector (1) is the fire hazard monitoring region of environment temperature exception, and generates the fire alarm comprising the positional information of described one group of cable formula heat detector (1);
S24) described fire alarm is sent to fire control device (16) corresponding with described one group of cable formula heat detector (1) in described fire alarm center (3).
4. fire alarm method according to claim 1, is characterized in that, described step S1 also comprises: the resistance value R(R being obtained each termination box of described N group cable formula heat detector (1) by described N group microcomputer modulator (2) respectively
1, R
2), according to described resistance value R(R
1, R
2) calculate one group of actual current value I ' (I of each termination box
1', I
2' ...).
5. fire alarm method according to claim 4, is characterized in that, described step S2 also comprises: by described N group microcomputer modulator (2) respectively by described one group of actual current value I ' (I
1', I
2' ...) the second current threshold (I of prestoring with it
0') compare;
As one group of actual current value I ' (I as described in judging
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector (1)
m', I
(m+1)' ...) be 0, then determine that open circuit fault appears in this group cable formula heat detector (1), generate the open circuit fault signal comprising the positional information of the source of trouble, and described open circuit fault signal is sent to the fire control device (16) corresponding with this group cable formula heat detector (1);
As one group of actual current value I ' (I as described in judging
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector (1)
m', I
(m+1)' ...) be all not less than described second current threshold (I
0'), then determine that short trouble appears in this group cable formula heat detector (1), generate the short circuit fault signal comprising the positional information of the source of trouble, and described short circuit fault signal is sent to the fire control device (16) corresponding with this group cable formula heat detector (1).
6. fire alarm method according to claim 5, it is characterized in that, described step S3 also comprises: received by described fire control device (16) described cable formula heat detector (1) open circuit fault signal or described cable formula heat detector (1) short circuit fault signal, process and show.
7. a fire early-warning system, it is characterized in that, comprise be separately positioned on N number of fire hazard monitoring region N group cable formula heat detector (1), be serially connected in the N group microcomputer modulator (2) in the same circuit and communicate to connect with described N group microcomputer modulator (2) and comprise the fire alarm center (3) of at least one fire control device (16), described N group microcomputer modulator (2) and described fire alarm center (3) form looped network, and each microcomputer modulator (2) all connects a corresponding with it cable formula heat detector (1);
Described N group cable formula heat detector (1) is for gathering the N group impedance signal of the ambient temperature conditions in sign N number of fire hazard monitoring region corresponding with it;
Described N group microcomputer modulator (2) is respectively used to receive described N group impedance signal, the fire hazard monitoring region determining environment temperature exception in described N number of fire hazard monitoring region is assessed according to the ambient temperature conditions of described N group impedance signal to described N number of fire hazard monitoring region, generate the fire alarm comprising the positional information in fire alarm source, and described fire alarm is sent to described fire alarm center (3);
Described fire alarm center (3), for receiving described fire alarm, according to the position in the fire hazard monitoring region of described fire alarm determination environment temperature exception, and opens the sprinkling equipment (4) in the fire hazard monitoring region of described environment temperature exception.
8. fire early-warning system according to claim 7, is characterized in that, described fire alarm center (3) comprises and described N group cable formula heat detector (1) and described N group microcomputer modulator (2) N number of fire control device (16) one to one;
Each microcomputer modulator (2) includes a MCU(7), with a described MCU(7) be electrically connected respectively signal acquisition module (5), memory module (15), signal amplifies and modular converter (6) and the first signal transmitting module (8);
Described memory module (15) stores the first whether abnormal current threshold (I of environment temperature for judging described N number of fire hazard monitoring region
0) and whether abnormal the second current threshold (I of duty for judging described N group cable formula heat detector (1)
0');
Described signal acquisition module (5) is for gathering the one group of impedance signal detected by one group of cable formula heat detector (1) corresponding with described microcomputer modulator (2);
Described signal amplification and modular converter (6) carry out amplification for the one group of impedance signal gathered by described acquisition module and process and the one group of current value (I being converted to the ambient temperature conditions for characterizing the fire hazard monitoring region corresponding to described microcomputer modulator (2)
m, I
(m+1));
A described MCU(7) for by this group current value (I
m, I
(m+1)) with the first current threshold (I of prestoring
0) compare; A described MCU(7) also for judging this group current value (I
m, I
(m+1)) be all not less than described first current threshold (I
0) time, determine that described fire hazard monitoring region is the fire hazard monitoring region of environment temperature exception, and generate the fire alarm comprising the positional information in fire alarm source;
Described first signal transmitting module (8) is for being sent to the fire control device (16) corresponding with described microcomputer modulator (2) of described fire alarm center (3) by described fire alarm;
The 2nd MCU(10 that each fire control device (16) includes load module (9), is electrically connected with described load module (9)); Described load module (9) is for receiving fire alarm, described 2nd MCU(10) for the position in the fire hazard monitoring region according to fire alarm determination environment temperature exception, and the sprinkling equipment (4) controlling the fire hazard monitoring region of described environment temperature exception starts spray operation.
9. fire early-warning system according to claim 7, is characterized in that, described in each, cable formula heat detector (1) includes a termination box; Each microcomputer modulator (2) is also for obtaining the resistance value R(R of each termination box of described N group cable formula heat detector (1)
1, R
2), according to described resistance value R(R
1, R
2) calculate one group of actual current value I ' (I of each termination box
1', I
2' ...), and by this group actual current value I ' (I
1', I
2' ...) the second current threshold (I of storing with described memory module (15)
0') compare;
Each microcomputer modulator (2) is also for passing through a MCU(7) judge this group actual current value I ' (I
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector (1)
m', I
(m+1)' ...) when being 0, determine that open circuit fault appears in this group cable formula heat detector (1), generate the cable formula heat detector open circuit fault signal comprising the positional information of the source of trouble, and by described first signal transmitting module (8), described cable formula heat detector open circuit fault signal is sent to the fire control device (16) corresponding with this group cable formula heat detector (1) of described fire alarm center (3);
Each microcomputer modulator (2) is also for passing through a MCU(7) judge this group actual current value I ' (I
1', I
2' ...) in come from one group of current value (I of any one group of cable formula heat detector (1)
m', I
(m+1)' ...) be all not less than described second current threshold (I
0') time, determine that short trouble appears in this group cable formula heat detector (1), generate the cable formula heat detector short circuit fault signal comprising the positional information of the source of trouble, and by described first signal transmitting module (8), described cable formula heat detector short circuit fault signal is sent to the fire control device (16) corresponding with this group cable formula heat detector (1) of described fire alarm center (3);
Each fire control device (16) also comprises and described 2nd MCU(10) display screen (13) that is electrically connected; Fire control device (16) described in each is also for receiving described cable formula heat detector open circuit fault signal or described cable formula heat detector short circuit fault signal by described load module (9), by described 2nd MCU(10) extract the positional information of failure message in described cable formula heat detector open circuit fault signal or described cable formula heat detector short circuit fault signal and the source of trouble, and the positional information of described failure message and the described source of trouble is shown by described display screen (13).
10. fire early-warning system according to claim 7, is characterized in that, each fire control device (16) also comprises a manual sprinkling fire-distinguishing button and a coordinated signals dish;
Each fire control device (16) is also for by the 2nd MCU(10) when the pressing signal of described manual sprinkling fire-distinguishing button being detected, further by the 2nd MCU(10) sprinkling equipment (4) that controls fire hazard monitoring region corresponding with it starts spray operation;
Described coordinated signals dish is used for breaking down when fire control device (16), or when system circuit breaks down, receives external force and start spray operation with the sprinkling equipment (4) controlling fire hazard monitoring region corresponding with it.
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|---|---|---|---|
| CN201410067478.6A CN104867264B (en) | 2014-02-26 | 2014-02-26 | Fire early-warning method and system |
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|---|---|---|---|
| CN201410067478.6A CN104867264B (en) | 2014-02-26 | 2014-02-26 | Fire early-warning method and system |
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| CN104867264B CN104867264B (en) | 2017-05-24 |
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| CN118430172B (en) * | 2024-05-10 | 2024-10-25 | 中国矿业大学 | Building fire monitoring and early warning method and system |
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