CN103761828A - Early warning method for fire disaster in passenger car engine cabin - Google Patents

Early warning method for fire disaster in passenger car engine cabin Download PDF

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Publication number
CN103761828A
CN103761828A CN201410009585.3A CN201410009585A CN103761828A CN 103761828 A CN103761828 A CN 103761828A CN 201410009585 A CN201410009585 A CN 201410009585A CN 103761828 A CN103761828 A CN 103761828A
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fuzzy
passenger car
engine cabin
fire
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杜建华
张认成
高艳艳
丁环
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Huaqiao University
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Huaqiao University
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Abstract

The invention discloses an early warning method for the fire disaster in a passenger car engine cabin. The method comprises the steps that a mamdani type fuzzy inference system of the fire disaster of the passenger car engine cabin is established, temperature data, oil gas data and current data inside the passenger car engine cabin are collected through a sensor, the collected data are converted into a corresponding temperature rate, corresponding oil gas concentration and a corresponding current pulse, the corresponding temperature rate, the corresponding oil gas concentration and the corresponding current pulse are input into the fuzzy inference system, the danger class of the fire disaster in the current passenger car engine cabin is obtained based on a fuzzy interference rule, and the early warning judgment is further made. The uncertainty and the limitation of a single parameter are overcome according to the coordination of a plurality of parameters and the complementary advantage of the performance, the effective performance of the early warning is improved, and according to the complex environment in the engine cabin, the fire disaster danger degree in the cabin can be effectively judged very well based on the occurrence characteristics of the passenger car fire disaster and the information fusion technology of the fuzzy theory.

Description

A kind of fire early warning method in engine cabin of passenger car
Technical field
The present invention relates to a kind of fire early warning method in engine cabin of passenger car.
Background technology
Along with the enhancing of economic activity, the use amount of passenger vehicle constantly increased in recent years.Meanwhile, also bring many passenger vehicle fire failures, and had ever-increasing trend.Because passenger vehicle handling capacity of passengers is large and majority travels in fire-fighting difficulty locations such as highways, so tend to cause huge casualties and huge property loss once catch fire.Therefore strengthen the attention of passenger vehicle fire and take precautions against significant.
At present, the fire detecting arrangements that adopt single parameter in engine cabin of passenger car more, according to the threshold value of setting, carry out detection, as passed through C.T. threshold value, flue gas concentration threshold value, but this mode is vulnerable to external environment impact, such as the speed of a motor vehicle is very fast, car external environment temperature is when higher, fault temperature threshold can drift about, and affects effective judgement of detection system.Therefore there are the following problems for the method: Threshold is excessive, can not effectively to fire, survey; Threshold is too small, may cause occurring wrong report, failing to report situation.Secondly, can not there is early stage driver in time at fire in the method, often fire development to a certain extent after, human pilot could be found the condition of a fire, is unfavorable for putting out in time of automobile fire.In engine cabin of passenger car, the fire detecting arrangements that adopt single parameter, carry out detection according to the threshold value of setting more.
Summary of the invention
Fundamental purpose of the present invention is more single for current engine cabin of passenger car fire detection parameter, be easy to be subject to external interference, the problems such as initial stage detection difficult, a kind of fire early warning method in engine cabin of passenger car is provided, adopt multi-parameter fusion technology, a plurality of physical quantitys in engine cabin of passenger car are surveyed, comprehensively judged simultaneously, can effectively improve the discrimination of engine cabin of passenger car fire fault.
A fire early warning method in engine cabin of passenger car, comprises the steps:
Step 1, set up the mamdani Fuzzy inference system of engine cabin of passenger car fire, the input quantity of described fuzzy inference system is temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3, the output y of this fuzzy inference system is the fire hazard rating in current time engine cabin of passenger car;
Step 2, in the fire-prone position and electric wiring of engine cabin of passenger car, arrange that some temperature sensors, oil gas sensor and current sensor are for gathering temperature, oil gas and the current signal in engine cabin of passenger car;
Step 3, the temperature, oil gas and the current signal that by temperature sensor, oil gas sensor and current sensor, collect are converted to corresponding temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3;
Step 4, in mamdani Fuzzy inference system, to conversion after temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3carry out fuzzy reasoning;
The fuzzy rule using is
Figure BDA0000454968270000021
if x 1is T k, x 2is G k, x 3is C k, then y is L kwherein, T k, G k, C kbe
Figure BDA0000454968270000022
on fuzzy set, L kbe on fuzzy set, linguistic variable x=(x 1, x 2, x 3) t∈ U=U 1* U 2* U 3represent the input of fuzzy inference system, linguistic variable y represents the output of fuzzy inference system;
Step 5, temperature rise speed x 1after fuzzy reasoning, be divided into three fuzzy class; Gas concentration x 2after fuzzy reasoning, be divided into two fuzzy class; Amount of current pulses x 3after fuzzy reasoning, be divided into three fuzzy class; The output of this fuzzy inference system is divided into four fuzzy class, on the basis of a large amount of passenger vehicle fire test simulations, sets up the fuzzy inference rule table between input and output;
Step 6, according to the temperature rise speed x of Real-time Collection 1, gas concentration x 2with amount of current pulses x 3affiliated fuzzy class obtains the fire hazard rating in current engine cabin of passenger car after fuzzy rule reasoning by fuzzy inference rule table.
Fire early warning method in a kind of engine cabin of passenger car of the present invention, adopt temperature sensor, oil gas sensor and current sensor is surveyed the temperature in engine cabin of passenger car, oil gas and line current and the data that gather are carried out to Fuzzy processing, finally by crossing fuzzy reasoning, comprehensively judge the fire hazard rating that breaks down in nacelle, result takes appropriate measures by inference, can judge early warning and stop the intensity of a fire to further develop at during Initial Stage of Fire.The present invention, by the coordination between many reference amounts and the complementary advantage of performance, overcomes uncertainty and the limitation of single parameter, improves the effective performance of early warning.Information fusion technology based on fuzzy theory, can, well according to the occurrence characteristic of passenger vehicle fire, for complex environment in nacelle, effectively judge fire hazard degree in cabin.
Accompanying drawing explanation
Fig. 1 is principle of work schematic diagram of the present invention;
Fig. 2 is the fuzzy inference rule table in the present invention.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment
As shown in Figure 1, a kind of fire early warning method in engine cabin of passenger car, comprises following concrete steps:
Step 1, set up the mamdani Fuzzy inference system of engine cabin of passenger car fire, the input quantity of described fuzzy inference system is temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3, the output y of this fuzzy inference system is the fire hazard rating in current time engine cabin of passenger car;
Step 2, in the fire-prone position and electric wiring of engine cabin of passenger car, arrange that some temperature sensors, oil gas sensor and current sensor are for gathering temperature, oil gas and the current signal in engine cabin of passenger car;
Step 3, the temperature, oil gas and the current signal that by temperature sensor, oil gas sensor and current sensor, collect are converted to corresponding temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3;
Step 4, in mamdani Fuzzy inference system, to conversion after temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3carry out fuzzy reasoning;
The fuzzy rule using is
Figure BDA0000454968270000041
if x 1is T k, x 2is G k, x 3is C k, then y is L kwherein, T k, G k, C kbe
Figure BDA0000454968270000042
on fuzzy set, L kbe
Figure BDA0000454968270000043
on fuzzy set, linguistic variable x=(x 1, x 2, x 3) t∈ U=U 1* U 2* U 3represent the input of fuzzy inference system, linguistic variable y represents the output of fuzzy inference system;
Step 5, temperature rise speed x 1after fuzzy reasoning, be divided into { T 1, T 2, T 3three fuzzy class; Gas concentration x 2after fuzzy reasoning, be divided into { G 1, G 2two fuzzy class; Amount of current pulses x 3after fuzzy reasoning, be divided into { C 1, C 2, C 3three fuzzy class; The output of this fuzzy inference system is divided into { L 1, L 2, L 3, L 44 fuzzy class, on the basis of a large amount of passenger vehicle fire tests simulations, the fuzzy inference rule table between setting up input and exporting, as shown in Figure 2;
Step 6, according to the temperature rise speed x of Real-time Collection 1, gas concentration x 2with amount of current pulses x 3affiliated fuzzy class obtains the fire hazard rating in current engine cabin of passenger car after fuzzy rule reasoning by fuzzy inference rule table, and further makes early warning judgement.
Because the present invention is in the fire-prone position and electric wiring of engine cabin of passenger car, by reasonable Arrangement temperature sensor, oil gas sensor and current sensor, gather temperature, oil gas and the current signal in cabin; Corresponding temperature rise speed, gas concentration and amount of current pulses are analyzed and be converted to the temperature collecting, oil gas and current data; By the temperature rise speed in engine cabin of passenger car, gas concentration and amount of current pulses, it is input quantity, take nacelle danger classes as output quantity, the multi-information merging technology of employing based on fuzzy set theory set up fuzzy inference system, on the basis of a large amount of passenger vehicle fire test simulations, set up the fuzzy inference rule table between input and output, according to fuzzy control rule, adopt min-max indistinct logic computer, fire in engine cabin of passenger car is carried out to reasoning and judging.If temperature is T 1grade, electric current are C 2grade, oil gas are G 2grade is now L by the fire hazard rating in fuzzy inference rule table reasoning engine cabin of passenger car 2grade.
The present invention, by the coordination between many reference amounts and the complementary advantage of performance, overcomes uncertainty and the limitation of single parameter, improves the effective performance of early warning.Information fusion technology based on fuzzy theory, can, well according to the occurrence characteristic of passenger vehicle fire, for complex environment in nacelle, effectively judge fire hazard degree in cabin.
The above, it is only preferred embodiment of the present invention, not technical scope of the present invention is imposed any restrictions, therefore any trickle modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment all still belong in the scope of technical solution of the present invention.

Claims (1)

1. a fire early warning method in engine cabin of passenger car, is characterized in that comprising the steps:
Step 1, set up the mamdani Fuzzy inference system of engine cabin of passenger car fire, the input quantity of described fuzzy inference system is temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3, the output y of this fuzzy inference system is the fire hazard rating in current time engine cabin of passenger car;
Step 2, in the fire-prone position and electric wiring of engine cabin of passenger car, arrange that some temperature sensors, oil gas sensor and current sensor are for gathering temperature, oil gas and the current signal in engine cabin of passenger car;
Step 3, the temperature, oil gas and the current signal that by temperature sensor, oil gas sensor and current sensor, collect are converted to corresponding temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3;
Step 4, in mamdani Fuzzy inference system, to conversion after temperature rise speed x 1, gas concentration x 2with amount of current pulses x 3carry out fuzzy reasoning;
The fuzzy rule using is
Figure FDA0000454968260000011
if x 1is T k, x 2is G k, x 3is C k, then y is L kwherein, T k, G k, C kbe on fuzzy set, L kbe
Figure FDA0000454968260000012
on fuzzy set, linguistic variable x=(x 1, x 2, x 3) t∈ U=U 1* U 2* U 3represent the input of fuzzy inference system, linguistic variable y represents the output of fuzzy inference system;
Step 5, temperature rise speed x 1after fuzzy reasoning, be divided into three fuzzy class; Gas concentration x 2after fuzzy reasoning, be divided into two fuzzy class; Amount of current pulses x 3after fuzzy reasoning, be divided into three fuzzy class; The output of this fuzzy inference system is divided into four fuzzy class, on the basis of a large amount of passenger vehicle fire test simulations, sets up the fuzzy inference rule table between input and output;
Step 6, according to the temperature rise speed x of Real-time Collection 1, gas concentration x 2with amount of current pulses x 3affiliated fuzzy class obtains the fire hazard rating in current engine cabin of passenger car after fuzzy rule reasoning by fuzzy inference rule table.
CN201410009585.3A 2014-01-09 2014-01-09 Early warning method for fire disaster in passenger car engine cabin Pending CN103761828A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104307131A (en) * 2014-10-14 2015-01-28 四川宏源德石化有限公司 Integral solving method for vehicle safety protection monitoring system
CN104408854A (en) * 2014-11-17 2015-03-11 华侨大学 Coach fire detection, extinguishing and pre-warning system and method thereof
CN106197532A (en) * 2016-06-15 2016-12-07 华侨大学 The fire-proof and explosion-proof early warning in chemical plant and fire extinguishing explosion-proof method
CN116978203A (en) * 2023-09-25 2023-10-31 四川天地宏华导航设备有限公司 Intelligent system and method based on fire control

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CN101986358A (en) * 2010-08-31 2011-03-16 彭浩明 Neural network and fuzzy control fused electrical fire intelligent alarm method
CN203260147U (en) * 2013-04-22 2013-10-30 华侨大学 Temperature detection device for early fire in vehicle engine compartment
CN203325139U (en) * 2013-07-17 2013-12-04 江苏海事职业技术学院 Marine engine room oil leakage alarm system
CN103440728A (en) * 2013-09-03 2013-12-11 哈尔滨工程大学 Ship fire extinguishing system cascading failure evaluation method for distributed intelligence control

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Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104307131A (en) * 2014-10-14 2015-01-28 四川宏源德石化有限公司 Integral solving method for vehicle safety protection monitoring system
CN104408854A (en) * 2014-11-17 2015-03-11 华侨大学 Coach fire detection, extinguishing and pre-warning system and method thereof
CN106197532A (en) * 2016-06-15 2016-12-07 华侨大学 The fire-proof and explosion-proof early warning in chemical plant and fire extinguishing explosion-proof method
CN116978203A (en) * 2023-09-25 2023-10-31 四川天地宏华导航设备有限公司 Intelligent system and method based on fire control
CN116978203B (en) * 2023-09-25 2023-12-26 四川天地宏华导航设备有限公司 Intelligent system and method based on fire control

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Application publication date: 20140430