CN212466888U - Directional intelligent fire extinguishing system for high-speed rail motor train unit - Google Patents
Directional intelligent fire extinguishing system for high-speed rail motor train unit Download PDFInfo
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- CN212466888U CN212466888U CN202020608080.XU CN202020608080U CN212466888U CN 212466888 U CN212466888 U CN 212466888U CN 202020608080 U CN202020608080 U CN 202020608080U CN 212466888 U CN212466888 U CN 212466888U
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Abstract
The utility model provides a directional intelligent fire extinguishing system that puts out a fire of high-speed railway EMUs, include: the system comprises a fire detection alarm system, a fire-fighting linkage control system and a fire-fighting system management platform; the fire-fighting linkage control system carries out directional fire extinguishing according to fire alarm information in the carriage of the high-speed rail motor train unit detected by the fire detection alarm system; and the fire-fighting system management platform supervises the operation of the fire detection alarm system and the fire-fighting linkage control system. The utility model discloses a directional intelligent fire extinguishing system that puts out a fire of high-speed railway EMUs realizes real-time detection, monitors the environment in the high-speed railway EMUs, when finding the fire source, the orientation puts out a fire to the fire source; adopt intelligence to put out a fire, need not the crew member and find the fire extinguisher and put out a fire, swift, safety more.
Description
Technical Field
The utility model relates to a fire extinguishing systems technical field, in particular to directional intelligent fire extinguishing system that puts out a fire of high-speed railway EMUs.
Background
At present, a high-speed rail motor train unit is a totally-enclosed train, although the train body is made of fireproof materials, people in the train are disordered and many personal objects are inflammable, if a spark is shot to the upper side to cause a fire, the fire cannot be extinguished in time, people in the train can escape without the way, no rescue personnel exist on a high-speed railway at all, and the consequence is unreasonable. Therefore, a large number of smoke alarm devices are installed on the motor train unit and connected with an ATO automatic system of the train, the smoke alarm devices can be triggered to give out harsh alarm sound only by detecting smoke, the train is braked and stopped emergently, and passengers are easy to panic.
The smoke alarm on general high-speed railway EMUs adopts all to be ion formula smoke sensing, realizes the fire prevention through the concentration of monitoring smog, and in case smog surpasss normal concentration, wireless transmitter will send wireless alarm signal, and the host computer that receives in a long distance is informed, transmits alarm information. Because the high-speed rail carriage is totally enclosed, the high-speed rail motor car is almost all flammable, if not very sensitive to smoke, huge dangerous accidents are easily caused, once the smoke alarm detects a little smoke, the alarm can give an alarm, the train can drive at a reduced speed or stop in an emergency, and the smoke prohibition of the high-speed rail motor car is strict. In order to ensure the safe operation of the train, the smoke alarms are arranged on each carriage of the train, the general smoke alarms have very high sensitivity to smoke for the sake of safety, and the alarm can be triggered as long as a little smoke exists. The fire detection alarm system installed on the high-speed motor train unit comprises a fire alarm host, an air suction type smoke detector and a smoke/heat composite detector, wherein the fire detection host can also monitor all the detectors when the detector loop breaks off. Although the fire detection alarm system realizes automatic alarm and fire extinguishing, no intelligent human-computer interface exists, rear personnel cannot monitor the situation of a fire scene in real time, the fire-fighting spray head is low in large-area spraying and fire-extinguishing efficiency, the utilization rate of the fire-extinguishing agent is low for places with limited fire-extinguishing agent capacity, waste is large, and secondary damage can be caused to the fire scene.
According to the specification of 89 text of iron public security (2010): the high-speed motor train unit is provided with a certain number of fire extinguishers in each carriage, 2 portable fire extinguishers of 2kg are respectively arranged in passing platform areas at two ends of each train, one is an ABC dry powder fire extinguisher, and the other is a water-based fire extinguisher; besides fire extinguishers arranged in the passing table areas at two ends of the dining car, 2 dry powder fire extinguishers of 4kg are required to be arranged in a kitchen or a dining bar area, and 1 carbon dioxide fire extinguisher of 5kg is required to be arranged in a driver's cab of a vehicle at the end part. However, the space of a high-speed train is limited, a large amount of fire extinguishing agents cannot be carried, a train fire generally occurs locally, rapid response and fixed-point fire extinguishing are needed, the damage to the train after fire extinguishing is minimum, two fire extinguishers, namely a portable water-based fire extinguisher and a portable dry powder fire extinguisher, have poor fire extinguishing effect on electric appliance fires, and are limited in fire extinguishing dosage, and particularly, the water-based fire extinguisher cannot be used for extinguishing live electrical fires.
In addition, the equipment of high-speed EMUs is numerous, and the circuit is complicated, and locomotive inner space is very narrow and small, and most of equipment, circuit all set up in the electrical apparatus cabinet, and cabinet door or protection casing are in the closed condition, and current fire control detection equipment can't be surveyed by priority, can't accomplish in time report to the police, in time deal with. The motor train unit has the advantages that the local part of the motor train unit really generates a fire condition, a crew member needs to enter a mechanical room and other parts to make judgment and extinguish the fire, the crew member needs to find the fire extinguisher configured for the motor train unit to carry out manual fire extinguishment, and serious potential safety hazards exist for some parts which are easy to cause explosion due to the fire condition.
In view of the defects of the prior art, the directional fire-extinguishing intelligent fire-fighting system for the high-speed rail motor train unit is urgently needed to be developed and researched aiming at the characteristics of the high-speed rail motor train unit.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to provide a directional intelligent fire extinguishing system for high-speed rail motor train units, which realizes real-time detection and monitoring of the environment in the high-speed rail motor train units, and when a fire source is found, the fire source is directionally extinguished; adopt intelligence to put out a fire, need not the crew member and find the fire extinguisher and put out a fire, swift, safety more.
The embodiment of the utility model provides a pair of intelligent fire extinguishing system of directional fire extinguishing of high-speed railway EMUs, include: the system comprises a fire detection alarm system, a fire-fighting linkage control system and a fire-fighting system management platform; the fire-fighting linkage control system carries out directional fire extinguishing according to fire alarm information in the carriage of the high-speed rail motor train unit detected by the fire detection alarm system; and the fire-fighting system management platform supervises the operation of the fire detection alarm system and the fire-fighting linkage control system.
Preferably, the fire detection alarm system includes: the system comprises a front network camera, a rear network camera, a front thermal imaging camera, a rear thermal imaging camera, a wireless sensing unit, an alarm loudspeaker, a fire detection alarm and a control center;
fire control coordinated control system includes: the fire-fighting system comprises a fire-fighting linkage controller, a fire extinguishing agent storage and transportation box, a booster pump, a plurality of electromagnetic valve groups and a plurality of servo fire-fighting nozzles;
the fire fighting system management platform comprises a PC terminal and a mobile terminal.
Preferably, the front webcam and the front thermal imaging camera both comprise webcams with ethernet interfaces;
the rear network camera and the rear thermal imaging camera comprise thermal imaging cameras with Ethernet interfaces.
Preferably, the wireless sensing unit comprises a wireless local area network based on a ZigBee protocol, and is used for detecting surrounding environment information in real time, analyzing and processing the surrounding environment information, judging whether an abnormality occurs, and sending a warning signal to the fire detection alarm.
Preferably, the fire detection alarm comprises an information processing module, an image processing module, a data recording module, a network switching module and a power conversion module.
Preferably, the fire extinguishing agent storage and transportation box is used for daily storage and transportation of the fire extinguishing agent, and comprises: the volume detection sensor detects the volume of the fire extinguishing agent in the fire extinguishing agent storage and transportation box in real time and can feed the volume back to the fire-fighting linkage controller.
Preferably, the booster pump comprises a fast air booster pump.
Preferably, targets in fields of view of the front network camera, the rear network camera, the front thermal imaging camera and the rear thermal imaging camera in the fire detection alarm system are imaged on a focal plane by the front network camera, the rear network camera, the front thermal imaging camera and the rear thermal imaging camera, converted into video signals and sent to a fire detection alarm through the Ethernet in real time;
the fire detection alarm divides the video signal into two paths, one path is used for the data recording module to carry out digital image nondestructive recording on the video signal, the other path is used for the information processing module and the image processing module to carry out data processing, image synthesis, target identification and in-vehicle space position calculation, and is fused with the temperature, gas and flame detected by the wireless sensing unit to confirm the fire source, and the fire detection alarm gives an alarm and reports to the control center when the fire source is confirmed; sending the space coordinates of the fire source in the carriage of the high-speed rail motor train unit to a fire-fighting linkage controller; simultaneously resolving the jet flow drop point and the jet flow track of the servo fire-extinguishing nozzle shot by the camera in real time, and feeding back the jet flow drop point, the jet flow track and the deviation amount with the fire source to the fire-fighting linkage controller;
the fire-fighting linkage controller executes the following operations:
receiving fire alarm information sent by a fire detection alarm system, and then carrying out linkage control on the fire extinguishing agent storage and transportation box, the booster pump, the plurality of solenoid valve groups and the plurality of servo fire extinguishing nozzles according to preset logic;
an electromagnetic valve group or a servo nozzle on a driving control site;
simultaneously resolving jet flow falling points and jet flow tracks of a plurality of servo fire extinguishing nozzles according to space coordinates in a carriage of the high-speed rail motor train unit, optimizing combination, selecting an optimal fire extinguishing control scheme, turning the nozzles capable of covering the fire source position to align to the fire source, and opening an electromagnetic valve group to extinguish the fire;
acquiring the pressure state in the fire extinguishing agent storage and transportation box in real time, and starting a booster pump according to the calculated jet flow track to automatically adjust or keep the pressure in the fire extinguishing agent storage and transportation box stable;
acquiring the capacity state of the fire extinguishing agent storage and transportation box, and reporting to a control center through a fire detection alarm when leakage or insufficient liquid quantity occurs;
the jet flow falling point and/or jet flow track shot by the front network camera and/or the rear network camera and/or the front thermal imaging camera and/or the rear thermal imaging camera are obtained through the fire detection alarm, the deviation amount of the jet flow falling point and the jet flow track and a fire source is determined, and the servo fire extinguishing nozzle is driven to finely adjust the jet flow falling point and the jet flow track.
Preferably, the solenoid valve bank comprises an electro-hydraulic proportional control valve.
Preferably, the servo fire extinguishing nozzle has a lifting hiding function and adopts a two-shaft rotating design.
Preferably, the servo fire-extinguishing nozzle comprises: the device comprises a telescopic mechanism, a first rotating mechanism, two second rotating mechanisms, two connecting pieces and a nozzle;
one end of the first rotating mechanism is fixedly connected with the telescopic mechanism; the two second rotating mechanisms are symmetrically fixed on two sides of the first rotating mechanism far away from the telescopic mechanism; one end of the connecting piece is fixedly connected with one end of the second rotating mechanism far away from the first rotating mechanism, and the other end of the connecting piece is fixedly connected with the nozzle; the connecting pieces correspond to the second rotating mechanisms one by one; the two connecting pieces are symmetrically positioned on two sides of the nozzle.
The utility model has the advantages that:
firstly, recording fire scene information images in real time, and playing back the information images after the fire scene information images are recorded;
automatically identifying fire source target information according to the image information, and extracting space coordinates in a carriage where the target point is located;
thirdly, carrying out intersection calculation according to more than two video measurement data, and resolving the coordinate of the target point;
sensing environmental information such as distributed ambient temperature, illumination, smoke, flame and the like of the detection node, and transmitting the environmental information to a fire detection alarm in real time through a wireless network;
fifthly, space coordinates in a carriage where the target point is located can be converted into lower position parameters of a coordinate system of each servo fire-extinguishing nozzle, and 360-degree space rotation positioning of each servo fire-extinguishing nozzle can be controlled;
sixthly, the pressure boosting, pressure detection and capacity detection functions of the fire extinguishing agent storage and transportation box are achieved, a certain pressure balance can be automatically maintained, and a liquid leakage and liquid lack state can be detected;
seventhly, the device has a multi-pipeline independent flow rate control function, and each single device has a fault diagnosis and detection function.
And eighthly, the system adopts real-time detection, monitoring and alarming, can realize network transmission, unified solid-state storage and intelligent human-computer interface, has the functions of remote reset, trigger mode, voice alarm prompt and the like, and can transmit data and standard image functions to a control center.
All the detection and fire extinguishing device equipment is passive equipment, the equipment is provided with a battery, an external power supply is not needed, meanwhile, the information transmission adopts a wireless communication mode, and the deployment and the construction are simple and convenient.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of an intelligent fire-fighting system for directional fire extinguishing of a high-speed rail motor train unit in an embodiment of the utility model;
fig. 2 is a schematic composition diagram of a directional fire extinguishing intelligent fire fighting system for a high-speed rail motor train unit in the embodiment of the utility model;
fig. 3 is a network system composition of a wireless sensing unit according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a fire detection alarm according to an embodiment of the present invention;
FIG. 5 is a schematic view of a servo fire extinguishing nozzle according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a stereo photography spatial localization rendezvous processing in an embodiment of the present invention;
fig. 7 is a schematic diagram of a jet search scan in an embodiment of the present invention;
fig. 8 is a schematic view of another fire extinguishing nozzle according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
The embodiment of the utility model provides a directional intelligent fire extinguishing system that puts out a fire of high-speed railway EMUs, as shown in figure 1, include: a fire detection alarm system 1-1, a fire-fighting linkage control system 1-2 and a fire-fighting system management platform 14; the fire-fighting linkage control system 1-2 carries out directional fire extinguishing according to fire alarm information in the carriage of the high-speed rail motor train unit detected by the fire detection alarm system 1-1; the fire-fighting system management platform 14 supervises the operation of the fire detection alarm system 1-1 and the fire-fighting coordinated control system 1-2.
The working principle and the beneficial effects of the technical scheme are as follows:
the fire detection alarm system 1-1 detects whether a fire source, the position of the fire source, the temperature and other parameters are found in a carriage of the high-speed rail motor train unit; the fire-fighting linkage control system 1-2 carries out directional fire extinguishing according to fire alarm information in the carriage of the high-speed rail motor train unit detected by the fire detection alarm system 1-1; the fire-fighting system management platform 14 supervises the operation of the fire detection alarm system 1-1 and the fire-fighting coordinated control system 1-2.
The utility model discloses a directional intelligent fire extinguishing system that puts out a fire of high-speed railway EMUs realizes real-time detection, monitors the environment in the high-speed railway EMUs, when finding the fire source, the orientation puts out a fire to the fire source; adopt intelligence to put out a fire, need not the crew member and find the fire extinguisher and put out a fire, swift, safety more.
Referring to fig. 2, the utility model discloses a directional fire-extinguishing intelligent fire-fighting system for high-speed rail motor train units, which comprises a fire detection alarm system 1-1, a fire-fighting linkage control system 1-2 and a fire-fighting system management platform 14; the fire detection alarm system 1-1 comprises a front network camera 1, a front thermal imaging camera 2, wireless sensing units 3 (1-N), a rear network camera 4, a rear thermal imaging camera 5, an alarm loudspeaker 6 and a fire detection alarm 7.
The thermal imaging camera and the network camera with the Ethernet interfaces are selected for the front network camera 1, the front thermal imaging camera 2, the rear network camera 4 and the rear thermal imaging camera 5, digital signal transmission is carried out through the Ethernet, and data recording and processing are facilitated.
Referring to fig. 3, the wireless sensor units 3(1 to N) include 20 groups, each group includes 25 terminal nodes, and each group includes at least 1 router node, and the maintenance of the entire network is completed by one coordinator node. The method is characterized in that: the wireless local area network based on the ZigBee protocol is used for detecting surrounding environment information in real time, analyzing and processing, judging whether abnormality occurs or not, actively sending out a warning signal to a coordinator node, transmitting the warning signal through a transmission network for multiple times of routing, and finally sending the warning signal to a remote monitoring station (namely a fire detection alarm). The wireless sensor unit includes: wireless sensors that detect ambient environmental information, such as wireless temperature sensors and wireless barometric pressure sensors.
The fire detection alarm 7 is designed by adopting an LRM structure, supports hot plugging, has BIT detection capability, can be quickly plugged and locked, and supports a power management function; the hardware platform is based on a core hardware platform formed by an LRM technology, and a real-time Ethernet is used as a main transmission link, so that a universal hardware architecture which is easy to expand and can be flexibly reconstructed is realized, and the system hardware platform is ensured to be independently upgraded and reconstructed and a power supply conversion module along with the technical development and the system requirement.
The fire detection alarm 7 comprises an information processing module 7-1, an image processing module 7-2, a data recording module 7-3, a network switching module 7-5 and a power supply conversion module 7-4. The information processing module adopts a high-performance and low-power-consumption processor unit, mainly realizes the functions of intelligent auxiliary decision, space position calculation, data receiving and transmitting, information and interface processing, fault detection and the like, and meets the requirements of a control system on data processing and rapid computing resources of real-time tasks. The image processing module adopts a special image and graphic processing board card to receive and process images of the thermal imaging camera and the network camera, complete detection and intelligent identification of the target, and output the superposed image and the angular deviation amount of the target relative to the center of the view field. The intelligent fire-fighting system comprises a data recording module, a data storage module and a power-on protection module, wherein the data recording module is used for realizing the functions of recording state data, control data and video data of the intelligent fire-fighting system for the high-speed rail and exporting the state data, the control data and the video data off line, the requirements of the functions of controlling system state recording, fault diagnosis, health management and the like on data storage resources are met, the power-on protection module has the functions of power-on starting and power-off protection, the data information recording time is not less than 240 hours. The network switching module realizes the switching transmission of real-time control data, can forward a real-time Ethernet data packet and a common Ethernet data packet, simultaneously supports the connection of a common Ethernet switch, has a 4G network communication function and a wireless data communication function, and meets the requirement of the number of network interfaces of a control system. Referring to fig. 4, the power conversion module realizes isolation filtering and voltage conversion from 220V mains supply to the secondary power supplies of the unit modules, meets the power consumption requirements of the functional modules, can configure power distribution parameters of all paths, monitors the power distribution voltage and current states of all paths in real time, and performs overcurrent, undervoltage, short circuit and overheat protection on the power distribution voltage and current of all paths according to different voltage and current threshold values set by the power distribution parameters of all paths.
The fire-fighting linkage control system 1-2 comprises a fire-fighting linkage controller 9, a booster pump 10, a fire-extinguishing agent storage and transportation box 11, an electromagnetic valve group 12 (configured according to the number of nozzles) and servo fire-extinguishing nozzles 13 (1-N).
The fire-fighting linkage controller 9 is a core component of the fire-fighting linkage control system 1-2, and carries out linkage control on the set automatic fire-fighting facilities according to preset logic by receiving fire alarm information sent by the fire detection alarm system 1-1. The fire-fighting linkage controller 9 simultaneously calculates jet tracks of the plurality of servo nozzles 13 according to space coordinates in a fire source carriage, optimizes combination, selects an optimal fire-fighting control scheme, turns the nozzles capable of covering the fire source position to aim at a fire source target, and opens the electromagnetic valve group 12 to put out a fire.
The booster pump 10 is a rapid air booster pump with a pressure sensor, and can feed back a pressure value to the fire-fighting linkage controller 9, so that the fire-fighting linkage controller 9 can obtain the pressure state in the fire-extinguishing agent storage and transportation box 11 in real time, and the booster pump 10 is started to automatically adjust or keep the pressure in the fire-extinguishing agent storage and transportation box 11 stable according to the calculated jet flow trajectory.
The fire extinguishing agent storage and transportation box 11 is used for daily storage and transportation of fire extinguishing agents, a capacity detection sensor is arranged in the box, the change of the volume in the box can be detected in real time, and a detection value is fed back to the fire-fighting linkage controller 9; when leakage or liquid shortage occurs, the alarm is reported to the control center 8 through the fire detection alarm 7 by the fire-fighting linkage controller 9.
The electromagnetic valve group 12 adopts an electro-hydraulic proportional control valve, and can continuously control the flow speed, the pressure and the direction of the system in proportion according to the electric signal input by the fire-fighting linkage controller 9 to realize the control of the position, the speed and the force of a jet flow track. The fire-fighting linkage controller 9 can directly drive and control the electromagnetic valve group 12 on the site without adding a driving device.
Servo shower nozzle 13(1 ~ N) of putting out a fire possesses the lift and hides the function, adopts the diaxon rotary design, can carry out 360 and high low electric rotation 360 controls in position electric rotation, satisfies directional arbitrary spatial position demand, and the motor adopts low-speed step motor, and open loop control need not to increase goniometer or encoder and can realize accurate location. Referring to fig. 5, the fire-fighting linkage controller 9 can directly drive and control the servo spray head 13 on the site without adding a driving device.
The fire protection system management platform 14 comprises a PC terminal 15 and a mobile terminal 16, and has the functions of system self-checking, data acquisition, data recording, image processing, target identification, data processing, drive output, system management, data communication and the like.
The principle of the utility model is as follows:
referring to fig. 6, the utility model discloses applied the space positioning rendezvous processing principle, utilized the coplane characteristic of two rays according to the position of projection point on left and right camera image planes promptly, confirmed the projection point corresponding relation between the camera, calculated the three-dimensional space position of target point. The method is characterized in that: according to the forward intersection method of the photogrammetry principle, O (X, Y, Z) is a geodetic coordinate system, an OX axis points to the true north or the direction of the earth, an OY axis points to the zenith, an OZ axis is determined according to the right-hand rule, and coordinates of two measuring stations in the geodetic coordinate system are respectively Oi(Xi，Yi，Zi)、Oj(Xj，Yj，Zj) The azimuth angles of the T points of the two cameras are A respectivelyi、AjThe high and low angles are respectively Ei、EjAnd i and j represent the serial numbers of the measuring stations. For a target point, the intersection of the line connecting the target and the camera must be coplanar, that is, the shortest distance between the two lines is zero, so that the coplanar condition must be satisfied, that is:
further, if di,jWhen the left projection point and the right projection point correspond to each other, a target point is intersected; if d isi,jAnd not equal to 0 shows that the left projection point and the right projection point are not the same projection point of the target point. Therefore, the coplanarity condition can be used for judging the corresponding problem of the multi-target projection points, and if the coplanarity condition is met, the two projection points are considered to be mutually corresponding and can meet. In practice, the system has errors, and thus the formula di,jNot equal to 0, and thus d is discriminatedi,jShould have a range as long as the discriminant di,jWithin this range, the pair of proxels may be considered to correspond to each other. Discriminant di,jNot only the error of the measuring system, but also the phaseThe measurement range of the machine.
Furthermore, after the false targets of each camera are removed, target coplanarity analysis is needed, the target corresponding problem of the projected images of the two cameras can be solved as long as the target corresponding problem of the first frame image or a proper frame image is solved, namely the corresponding problem of the projected image projected points of the two cameras at any moment can be solved according to the time corresponding relation or the frame number, and the multiple target fire sources need to be judged according to the fire source target coplanarity so as to remove the false target points.
The utility model discloses a jet track draws algorithm and terminal point recognition algorithm based on video image associativity based on three colour differences of RGB. The method is characterized in that: firstly, according to the known general installation position of the servo fire-extinguishing nozzle, judging around the predicted position to identify the starting point and the jet direction of the jet; secondly, after the starting point and the direction of the jet flow are determined, a unidirectional search algorithm based on RGB (red, green and blue) three-color difference is executed in the direction from the starting point to extract the jet flow track; and finally, after the jet flow track is extracted, judging the jet flow end point according to the relevance of a plurality of continuous video images, and realizing the tracking of the jet flow end point.
Further, if it is difficult to directly extract the jet trajectory from the image, the jet trajectory needs to be extracted by unidirectional search after determining the starting point and the direction. Firstly, the identification and direction judgment of the jet starting point are carried out, the positions of the servo fire extinguishing nozzles are fixed and are all installed at the edge of a monitoring area, so that the starting point and the direction of the jet of the servo fire extinguishing nozzles can be generally judged, the approximate direction of the jet needs to be determined after the starting point of the jet is determined, and the scanning is carried out in 24 directions around by taking the starting point of the jet as a reference point, because the starting point of the jet is generally positioned at the edge of an image, and the searching in the direction is directly abandoned when the image boundary is touched during the searching. Secondly, after the starting point and the direction of the jet flow track are determined, the jet flow is searched unidirectionally from the starting point of the jet flow according to the jet flow direction, and the jet flow direction has 8 possibilities, namely 8 main directions of up, down, left, right, up-left, down-left, up-right and down-right. As shown in fig. 7, a red point is used as a scanning reference point, a pixel with a black point as a relative position is scanned by taking the red point as a reference point, if a pixel point with the black point as the relative position is scanned by taking a jet starting point as the reference point in the first scanning, a proper point is found by an algorithm to be used as the reference point in the next scanning, the same algorithm is executed to search by taking a newly found point as the reference point in the next scanning, and so on until the search range exceeds the boundary of the image, the slopes of all the points are counted again after the scanning is finished, and the slope with the largest occurrence number is set as a reference slope for the next identification. And finally, identifying the jet flow end point, wherein accurate fire extinguishment can be realized only by accurately identifying the jet flow end point, the jet flow track has extremely strong directivity according to the jet flow extraction result, the direction cannot be suddenly changed in a short distance, the identified result after the jet flow end point has obvious irregularity, meanwhile, the point on the jet flow track and the point on the non-jet flow track have obvious color difference, and the movement of the drop point between adjacent video frames cannot be too large.
Further, the endpoint recognition is calculated three times in total, and the specific algorithm is as follows:
first, the sum of absolute values of the differences between the slopes of 7 consecutive base points and the reference slope is counted from the start point of the jet, and since the slopes of the base points on the trajectory of the jet appearing in the recognition of the jet are almost all the reference slopes and the error does not exceed 1 at most, when the sum of the absolute values of the differences between the counted slopes of the 7 consecutive base points and the reference slope is greater than 4, the start point of the 7 consecutive points can be judged as the pseudo-drop point.
Secondly, the color of the jet flow track is greatly different from the color of the surrounding environment, the jet flow track generally has high brightness, RGB three-color components are relatively balanced, and a certain color cannot be highlighted, so that the difference between RGB three colors of adjacent scanning base points is calculated, and when the sum of the absolute values of the three color differences is greater than 150 or the difference between single colors is greater than 80, the front point of the two points is judged to be a suspected drop point.
Finally, the absolute value of the difference between the slope of 7 continuous base points and the reference slope is counted from the jet starting point, and when the number of times that the absolute value of the difference between the 7 base points and the reference slope is greater than 1 exceeds 4 times, the starting point of the 7 continuous base points is judged to be a suspected falling point.
The utility model discloses a flame based on RGB space draws, its characterized in that: a large number of research and experiment results show that the color of the flame is really the special character of the flame, the color of the flame mostly meets certain constraint conditions, and the flame has a certain color range, which is the basis for extracting the flame by using a color threshold value. In the RGB color space, the color of the flame is basically constrained by the conditions given by the following formula, where the two ratios are to remove the effect of the brightness variation to some extent.
Wherein r represents the component of the pixel point on red, g represents the component of the pixel point on green, and b represents the component of the pixel point on blue;
further, this algorithm basically segments the body of the flame and its main profile, which are the important basis for feature extraction in the fire detection method. After the suspected flame area is extracted, the fact that a fire breaks out cannot be explained, the extracted area is not necessarily a flame in many cases and is likely to be some interference source, and therefore the suspected area needs to be identified, and a feature selection problem is involved. According to the above, although the flame extraction works well in a simple environment, it is difficult to extract a complete flame contour in a complex situation, so in order to improve the applicability of the algorithm, it should be avoided to adopt features that need a complete flame region to be expressed, such as edge features related to the contour; in this case, the color feature may be continuously selected as a basis for flame identification, and different from a threshold value for providing a flame color during segmentation, in the case of obtaining a suspected main body of the flame, the color of the flame is not constant from the flame center to the outer flame, so that the distribution of the color may be used to determine whether the extracted part is the flame, construct a color histogram to determine a color space for expressing color information; an HSV (hue, saturation, value) color space is selected to construct a color histogram, the HSV space is more suitable for the visual perception of human eyes than an RGB (red, green and blue) space, the HSV space is a common color space in color identification, and four methods are mainly used for carrying out color quantization and extracting the histogram. Firstly, color space is directly and averagely divided, and three channels of HSV are respectively averagely divided into four parts; secondly, aggregating the colors by using a clustering method so as to divide the colors into a plurality of categories; thirdly, the color space is divided into six different hierarchies by a supervised learning mode; and fourthly, according to the color sensitivity of human vision, dividing H into 16 intervals by adopting a non-uniform classification mode, dividing S, V into 4 intervals respectively, and combining the intervals into 16 multiplied by 4-256 color intervals.
The utility model discloses the method based on the color threshold value has equally been selected to the drawing in the suspected region of smog, and what be different with flame smog is difficult to distinguish from the surrounding environment more, and its color variation range is big moreover, consequently after carrying out the color threshold value and drawing, still need to carry out further screening through the morphological information of smog, and similar with the flame color based on the RGB space draws, through investigation, experiment, the restriction relation of following formula is all satisfied to the colour of general smog.
Wherein I is brightness, and there are many interference sources in the profile extracted only by the smoke color information in the actual field, so that the screening needs to be performed by combining the form information.
The utility model discloses work flow:
a system initialization stage: starting a power supply, initializing fire detection alarm software, self-checking each device of the system, setting camera parameters (data file name, recording time, delay time, sampling frequency, integration time and the like), and adjusting an aperture, integration time, a bright threshold and a dark threshold according to background conditions to enable the camera to be in an optimal display state; meanwhile, each wireless detection unit carries out initialization configuration, after the configuration is completed, a self-checking result is reported, and the fire detection alarm software summarizes the self-checking result of each device and reports the self-checking condition to the control center 8.
And (3) a system detection working stage: the fire detection alarm software receives the data of the front network camera 1, the data of the front thermal imaging camera 2, the data of the rear network camera 4, the data of the rear thermal imaging camera 5 and the data of the wireless sensing units 3 (1-N) through the network, records all the received data in real time, superposes the two paths of video signals, carries out intelligent identification aiming at a fire source target, carries out space calculation processing on the identified fire source target, positions the position of the fire source target in a carriage, sends fire alarm information through the fire detection alarm 7 and reports the fire alarm information to the control center 8.
A fire fighting treatment stage: the fire-fighting linkage control software acquires the capacity state of the fire extinguishing agent storage and transportation box 11, reports the fault state when leakage or insufficient liquid occurs, simultaneously the fire-fighting linkage controller 9 acquires the pressure state in the fire extinguishing agent storage and transportation box 11 in real time, calculates the jet flow track according to the received fire source target space position information, and starts the booster pump 10 to automatically adjust or keep the pressure in the storage and transportation box stable. The fire-fighting linkage controller 9 simultaneously calculates jet flow tracks of the plurality of servo fire-fighting nozzles 13 according to space coordinates in a fire source carriage, optimizes the combination, selects an optimal fire-fighting control scheme, drives a servo fire-fighting nozzle motor, transfers the nozzles capable of covering the fire source position to aim at a fire source target, and opens the electromagnetic valve group 12 to extinguish fire. The fire detection alarm 7 feeds back the deviation value of the jet flow falling point track and the fire source of the fire-fighting linkage controller 9 in real time according to the jet flow falling point and the jet flow track shot by the camera, and the fire-fighting linkage controller 9 calculates and corrects the deviation value and drives the servo fire-fighting nozzle 13 to perform fine adjustment.
Referring to fig. 8, in one embodiment, the servo fire sprinkler includes: the device comprises a telescopic mechanism 2-0, a first rotating mechanism 2-1, two second rotating mechanisms 2-2, two connecting pieces 2-3 and a nozzle 2-4;
one end of the first rotating mechanism 2-1 is fixedly connected with the telescopic mechanism 2-0; the two second rotating mechanisms 2-2 are symmetrically fixed on two sides of the first rotating mechanism 2-1 far away from the telescopic mechanism 2-0; one end of the connecting piece 2-3 is fixedly connected with one end of the second rotating mechanism 2-2 far away from the first rotating mechanism 2-1, and the other end of the connecting piece is fixedly connected with the nozzle 2-4; the connecting pieces 2-3 correspond to the second rotating mechanisms 2-2 one by one; the two connecting pieces 2-3 are symmetrically positioned at two sides of the nozzle 2-4.
The working principle and the beneficial effects of the technical scheme are as follows:
the first rotating mechanism provides 360-degree rotation of the nozzle on a horizontal plane; the second rotating mechanism provides 360-degree rotation of the nozzle on the vertical surface; the telescopic mechanism provides the nozzle to be telescopic up and down, so that the hiding function is realized; the telescopic mechanism comprises a telescopic cylinder, and the first rotating mechanism and the second rotating mechanism both comprise rotating cylinders.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The utility model provides a directional intelligent fire extinguishing system that puts out a fire of high-speed railway EMUs which characterized in that includes: the system comprises a fire detection alarm system, a fire-fighting linkage control system and a fire-fighting system management platform; the fire-fighting linkage control system carries out directional fire extinguishing according to fire alarm information in the carriage of the high-speed rail motor train unit detected by the fire detection alarm system; and the fire fighting system management platform supervises the operation of the fire detection alarm system and the fire fighting linkage control system.
2. The high-speed rail motor train unit directional fire-extinguishing intelligent fire-fighting system as claimed in claim 1, wherein the fire detection alarm system comprises: the system comprises a front network camera, a rear network camera, a front thermal imaging camera, a rear thermal imaging camera, a wireless sensing unit, an alarm loudspeaker, a fire detection alarm and a control center;
fire control coordinated control system includes: the fire-fighting system comprises a fire-fighting linkage controller, a fire extinguishing agent storage and transportation box, a booster pump, a plurality of electromagnetic valve groups and a plurality of servo fire-fighting nozzles;
the fire fighting system management platform comprises a PC terminal and a mobile terminal.
3. The intelligent fire fighting system for directional fire extinguishing of the high-speed rail motor train unit according to claim 2, wherein the front webcam and the front thermal imaging camera each comprise a webcam with an ethernet interface;
the rear network camera and the rear thermal imaging camera both comprise thermal imaging cameras with Ethernet interfaces;
the wireless sensing unit comprises a wireless local area network based on a ZigBee protocol and is used for detecting surrounding environment information in real time, analyzing and processing the surrounding environment information, judging whether an abnormality occurs or not, and sending a warning signal to the fire detection alarm.
4. The high-speed rail motor train unit directional fire-extinguishing intelligent fire-fighting system as claimed in claim 2, wherein the fire detection alarm comprises an information processing module, an image processing module, a data recording module, a network switching module and a power conversion module.
5. The intelligent fire extinguishing system for directional fire extinguishing of the high-speed rail motor train unit according to claim 2, wherein the fire extinguishing agent storage and transportation box is used for daily storage and transportation of fire extinguishing agents, and comprises: and the volume detection sensor detects the volume of the fire extinguishing agent in the fire extinguishing agent storage and transportation box in real time and can feed the volume back to the fire-fighting linkage controller.
6. The intelligent fire fighting system for directional fire extinguishing of the high-speed rail motor train unit as recited in claim 2, wherein the booster pump comprises a fast air booster pump.
7. The intelligent fire-fighting system for directional fire extinguishing of the high-speed rail motor train unit as recited in any one of claims 2 to 6,
in the fire detection alarm system, targets in the fields of view of the front network camera, the rear network camera, the front thermal imaging camera and the rear thermal imaging camera are imaged on a focal plane and converted into video signals, and the video signals are transmitted to the fire detection alarm through the Ethernet in real time.
8. The high-speed rail motor train unit directional fire-extinguishing intelligent fire-fighting system as claimed in claim 2, wherein the solenoid valve group comprises an electro-hydraulic proportional control valve;
the servo fire extinguishing nozzle has a lifting hiding function and adopts a two-shaft rotating design.
9. The high-speed rail motor train unit directional fire-extinguishing intelligent fire-fighting system as claimed in claim 2, wherein the servo fire-extinguishing nozzle comprises: the device comprises a telescopic mechanism, a first rotating mechanism, two second rotating mechanisms, two connecting pieces and a nozzle;
one end of the first rotating mechanism is fixedly connected with the telescopic mechanism; the two second rotating mechanisms are symmetrically fixed on two sides of the first rotating mechanism far away from the telescopic mechanism; one end of the connecting piece is fixedly connected with one end of the second rotating mechanism far away from the first rotating mechanism, and the other end of the connecting piece is fixedly connected with the nozzle; the connecting pieces correspond to the second rotating mechanisms one by one; the two connecting pieces are symmetrically positioned on two sides of the nozzle.
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| CN114849102A (en) * | 2022-04-26 | 2022-08-05 | 常州市达克富尔环保科技有限公司 | Sedimentation type automatic lifting fire extinguishing device, system and method for vehicle and fine water spray head |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114849102A (en) * | 2022-04-26 | 2022-08-05 | 常州市达克富尔环保科技有限公司 | Sedimentation type automatic lifting fire extinguishing device, system and method for vehicle and fine water spray head |
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