1856 results about "Fire detection" patented technology

Detecting video phenomena, such as fire in an aircraft cargo bay, includes receiving a plurality of video images from a plurality of sources, compensating the images to provide enhanced images, extracting features from the enhanced images, and combining the features from the plurality of sources to detect the video phenomena. Extracting features may include determining an energy indicator for each of a subset of the plurality of frames. Detecting video phenomena may also include comparing energy indicators for each of the subset of the plurality of frames to a reference frame. The reference frame corresponds to a video frame taken when no fire is present, video frame immediately preceding each of the subset of the plurality of frames, or a video frame immediately preceding a frame that is immediately preceding each of the subset of the plurality of frames. Image-based and non-image based techniques are described herein in connection with fire detection and/or verification and other applications.

The present invention is directed to providing systems and methods for remotely monitoring sites to provide real time information which can readily permit false alarms to be distinguished, and which can identify and track the precise location of an alarm. In exemplary embodiments, monitoring capabilities such as intrusion/fire detection and tracking capabilities, can be implemented through the use of multistate indicators in a novel interface which permits information to be transmitted using standard network protocols from a remote site to a monitoring station in real-time over preexisting communication networks, such as the Internet. A wireless network can also be established using browser encapsulated communication programs (for example, active X control, Java applets, and so forth) to transmit data packets which comply with any standard wireless local area network protocol. Communications can thereby be established between a web server embedded in a centrally located host monitoring station and a separate security panel deployed in each of the buildings to be remotely monitored. In exemplary embodiments, communications can be handed off from the centrally located host monitoring station to a mobile monitoring station (for example, to a laptop computer in a responding vehicle, such as a police or fire vehicle). The handoff can be such that direct communications are established between a security panel site being monitored and the laptop, or over, for example, a cellular network or indirect communications can be established via the host monitoring station.

The present invention is directed to providing systems and methods for remotely monitoring sites to provide real time information which can readily permit distinguishing false alarms, and which can identify and track the precise location of an alarm. In embodiments, monitoring capabilities such as intrusion/fire detection and tracking capabilities, can be implemented through the use of multistate indicators in a novel interface which permits information to be transmitted using standard network protocols from a remote site to a monitoring station in real-time. In embodiments, communications can be handed from the centrally located host monitoring station to a mobile monitoring station (for example, a laptop computer in a responding vehicle, such as a police or fire vehicle). Additional embodiments include high, low, and rate-of-change alarms; chromagraphic representation of the value of an environmental or other parameter measured in a space; and detection and location of portable interface devices in a space.

To eliminate the drawbacks of false alarm problems due to mimic flame features of sunlight or moonlight reflecting on wave or mimic flame features of fabrics, animals or stage flames and alarm failures of methanol or ethanol burning flames or flames under a high illumination background condition, a multi-wavelength video image fire detecting system is disclosed consisting of a multi-wavelength video image fire detector, which is comprised of a color and near IR dual-mode camera, a color and B/W dual-mode camera, an image capture module, a processor and controller, an I/O module, a housing and a visible light and near IR view window, an alarm and indicate equipment, a setting and debugging system, a communication equipment, an area alarm and monitor system, and a pan & title and control system.

The invention provides a self-contained automatic fire detection, warning, and suppression life safety system having an extinguishant source and a fire detector coupled to an electronic processor. The processor has logic to interface with components for detecting and warning of a fire and releasing the extinguishant. Self-diagnosis logic checks the entire system's function, pressure, power level, and power source. Additional sensors are provided for detecting various hazards, and the processor has logic for proper response.

The invention relates to the field of fire-fighting, in particular to an image identification-based fire detecting system and a fire alarm system thereof. The multiband infrared image-type fire detecting system comprises an image acquisition unit, an image processing unit and an alarming unit, wherein the image acquisition unit sends the collected images to the image processing unit; according to the processing algorithm of the image processing unit, the collected infrared images are judged whether to meet the characteristics of the fire; for the images which meet the fire default values, alarming to the alarming unit is conducted; and the image acquisition unit comprises a half transparent and half reflecting beam splitter, an infrared filter and a camera, wherein the monitored area is synchronously monitored by two cameras added with infrared filters with different wavelengths through the half transparent and half reflecting beam splitter. The invention has the advantages of being sacred from the limitation of environmental conditions such as spatial height, heat barrier, easy explosive, poisonousness and the like, being capable of conducting early stage fire detection in large space and outdoor open space, low cost and the like.

The invention relates to a multi-frequency image fire detection system comprising a chromatic/black and white double-changeful camera, a chromatic/near infrared double-changeful camera, an image collection module, a signal processing and control module, an input-output module, an alarm display device, a setting and debugging system, a communication device and an area alarm monitoring system, wherein the chromatic/near infrared camera is manufactured by adopting a CCD or CMOS image sensor with the frequency spectrum response range of 400nm-1200nm and a high-pass infrared optical filter with the wave band of the cut-off frequency of 850nm (or 950nm and more than 950nm); and the chromatic/black and white camera also adopts the CCD or CMOS image sensor with the frequency spectrum response range of 400nm-1200nm. The signal processing and control module comprises a smoke and flame identification and fire data integration arithmetic, a light source control arithmetic, a cradle head control arithmetic, a double-changeful camera switching control arithmetic and a fire positioning arithmetic based on double cameras.

The invention provides a method and a system for detecting forest fire. The system is composed of a forest monitoring point which comprises a heavy-duty digital tripod head 1, a thermal infrared imager 2, a visible light camera 3, a micro-meteorological station 4, embedded video processing equipment 5 and a communication bridge 6, and a command and control center which comprises a telemonitoring computer 7 and a communication bridge 8, wherein, the two communication bridges are communicated by a microwave wireless Tcp/IP network. The fire detection work is sequentially performed by the following six major steps: (1) field data acquisition, (2) image data processing, (3) fire recognition and analysis, (4) transmission of recognition results, (5) fire probability assessment and (6) automaticfire early warning. The method and the system combines video compression and decompression technology, thermal infrared image recognition and analysis technology, visible light color image recognition and analysis technology, embedded technology, wireless communication technology, remote sensing (RS) technology and 3D geographic information system technology to automatically recognize forest fireand analyze fire strategies, thus the method and the system are characterized by high detection probability of forest fire, low false alarm rate, no artificial participation, strong timeliness, highreliability, advanced technological means and wide market prospects.

A method and system are provided, which provides reliable fire detection. In one implementation, the automated system includes a combination of sensors configured to measure various factors associated with a hazard, such as a fire or gas leakage, and generate sensor readings. Factors measured can include smoke, carbon monoxide and heat. The system further includes a detection device that is configured to determine whether a hazard or fire exists by performing a fuzzy analysis of sensor readings. The fuzzy analysis includes categorizing respective sensor readings into fuzzy sets, and determining whether the hazard exists based on a combination of the categorizations. In addition the size and direction of a fire can be determined from multiple sensors.

The invention discloses a building information total management system and method. The system comprises a fire control linkage monitoring unit, a public infrastructure monitoring unit, a security monitoring unit, a water and gas leakage monitoring unit, an environment quality monitoring unit, a management controlling unit, a core processing unit and an alarm managing unit, wherein the fire control linkage monitoring unit is used for obtaining smoke and fire detection information; the public infrastructure monitoring unit is used for obtaining working state information of public infrastructures; the security monitoring unit is used for obtaining monitoring data of security monitoring equipment; the water and gas leakage monitoring unit is used for obtaining detection information for representing water/gas leakage of water/gas supply equipment; the environment quality monitoring unit is used for obtaining environment quality detection information; the management monitoring unit is used for receiving a control command of a user and sending the control command to the core processing unit; the core processing unit is used for forwarding the detection information of the monitoring/detection unit and alarm information to the management monitoring unit and forwarding the control command of the management controlling unit to an appointed monitoring/detecting unit to control corresponding building equipment to operate; and the alarm managing unit is used for selecting an alarm mode according to the event grade of the alarm information.

A combination fire detection and fire suppression system may include a fire detection system configured to detect an undesirably high temperature associated with an area. The fire detection system may include a temperature sensor including a temperature sensor array and a fire alerting system associated with the temperature sensor. The fire alerting system may be configured to receive information from the temperature sensor and generate a warning signal based on an undesirably high temperature associated with the area. The fire detection system may include a fire control panel configured to receive the warning signal. The system may also include a fire suppression system including a fire suppressant delivery system configured to provide at least one fire suppressant agent to the area associated with the undesirably high temperature.

Fire detection and smoke detection use an image capturing device to obtain images from a predetermined area and adopts an RGB (red, green, blue) color model based chromatic and disorder measurement for extracting fire pixels and smoke pixels. The extracted pixels are inputted to a fire detection fuzzy alarm system to generate an output of alarm information. Based on iterative checking on the growing ratio of the alarm information, a fire alarm is released accordingly.

A sensor unit comprising a heat resistant shell, the shell having a plurality of viewing windows spaced around the shell exterior to define a 360° view around the unit, each viewing window being optically coupled to an infrared pyroelectric sensor and an infrared thermopile sensor, the interior of the shell defining a chamber containing at least two different smoke detectors, the shell having ventilation holes communicating with the chamber and temperature sensors mounted on the unit, the shell housing at least one printed circuit board coupled to the sensors and detectors and supporting a computer and radio transmitter, and a rechargeable power source powering the printed circuit board.

The invention discloses a fire fighting method of a container type lithium ion battery energy storage system. The fire fighting method of the container type lithium ion battery energy storage system utilizes an automatic fire extinguishing system and an early warning system, can separately initiate three-stage fire-extinguishing responses in different stages of fire happening and spreading in energy storage containers, such as single battery fire, battery module fire and energy storage system fire, and sends out three-stage warning signals, that is, through a fire detection and fire extinguishing system, a fine water mist fire extinguishing system and a water spray and water curtain system, the single battery fire as well as the spread of the fire between a battery cabinet and even the containers can be effectively restrained and prevented; and meanwhile, terminal monitor personnel takes different emergency measures through the different early warning signals, so that the safety and efficient operation of the container type energy storage system is ensured.

The invention discloses an indoor fire detection method based on a video monitoring platform. The indoor fire detection method includes the steps: converting formats of inputted video code stream; preprocessing the video stream; detecting movement of the video stream to obtain movement pixels; extracting connected domains of the movement pixels meeting conditions; detecting multilayer colors of the connected domains and reserving the connected domains with flame and smoke characteristic colors; calculating the corresponding area variation and the central movement speed of the connected domains conforming to flame color characteristics to analyze dynamic variation; performing wavelet transformation for the connected domains conforming to smoke color characteristics, extracting high-frequency components and calculating the decay degree of the high-frequency components; calculating the perimeter and the area of the connected domains meeting the conditions and analyzing static shapes; andanalyzing by considering all the conditions and finally judging whether fire occurs or not. By the aid of the method, flame and indoor flicker lamps can be effectively and rapidly distinguished, and false alarm rate is greatly reduced.

The invention discloses a forest fire detection, prevention and control method based on an unmanned aerial vehicle. According to the forest fire detection, prevention and control method, the mode that visible-light images and thermal infrared images are combined is adopted, a forest fire can be judged by observing thermal image difference values of high-brightness points of the images, and fire extinguishing bags are released so as to extinguish fire head points in time or control fire behaviors primarily; accurate analysis is further conducted through a receiving station on the ground, abnormal areas missed during rough judgment conducted by the unmanned aerial vehicle can be found in time, and particularly monitoring can be achieved more effectively by forming a percentage distribution diagram of fire behavior possibility coefficients; efficiency and accuracy are high.

The invention discloses a fire disaster detection system and a method thereof. The fire disaster detection system at least comprises two changeable cameras as a first camera of colorful or near infrared mode and a second camera of colorful or white-black mode, for obtaining the video images of detected region; an image collection module connected with two changeable cameras for converting and filtering the video images collected by the two changeable cameras into digital images, to obtain time sequence images; a fire disaster recognition module connected with the image collection module for analyzing the time sequence images, to obtain flame, smoke and fire disaster occurrence probability; and an alarm module connected with the fire disaster recognition module for comparing the flame, smoke and fire disaster occurrence probability with a preset threshold value, and emitting alarm message according to the comparison result. The invention can effectively obtain the fire disaster video images under various backlight conditions, to realize early and reliable fire disaster alarm.

A photodetector having sensitivity in a wide temperature range in both an infrared and an ultraviolet band is provided. The photodetector is formed on a single chip and is designed to be blind to solar or visible radiation. Structures disclosed allow fast and efficient detection of signals with high spatial and temporal resolution. Such sensors may be used for multi-pixel focal arrays and applied for fire detection applications, various space- and military-related applications and other applications. A method for increasing rejection of visible light by the IR sensitive material is also provided.

Method for automatically detecting fires, based on flame and/or smoke recognition by analyzing a sequence of images. The analysis is based on several image processing algorithms. One algorithm consists in comparing the frequency content of at least an image of said sequence with the frequency content of a reference image so as to detect an attenuation of high frequencies independently of variations on other portions of the spectrum.

The invention discloses a fire linking control system applied to urban rail transit and a method. The fire linking control system comprises a main control system, a fire automatic alarm system, an electromechanical device monitoring system, a communication system, an intelligent low-voltage system, a ventilating air conditioning system and the like; the fire automatic alarm system is used for realizing fire detection and alarming, judging whether a fire accident arises and the detailed location of the fire accident; the fire automatic alarm system selects a corresponding fire mode instruction according to environmental control requirements provided by the ventilating air conditioning system and different fire accident locations; the electromechanical device monitoring system receives and analyzes the fire mode instruction and drives fire fighting apparatuses to operate according to a predefined mode so as to execute a corresponding fire fighting mode. The fire linking control system can greatly increase the coordination linkage capability of fire fighting, save the response time of fire fighting, imorove fire fighting efficiency and enhance the reliability and stability of a fire fighting system.

The invention relates to a method for identifying and detecting flame of a tunnel fire hazard. The method comprises the following steps: performing a pretreatment of eliminating illumination on an input video stream; performing motion detection on the video stream to obtain a moving pixel; performing color detection on the video stream to obtain a color pixel with flame characteristics; searching communication areas which are formed by all mutually connected pixels according with same characteristics; calculating out the perimeters and the areas of the obtained communication areas to perform shape analysis; and performing area variation analysis on each communication area to finally judge whether a fire hazard happens. The method, based on a fire hazard detection system with image processing, can correctly identify flame information from an image sequence with background noise according to the characteristics of flame images that the color, the shape and glittery characteristic, the position, the area and the brightness of the flame images change over time, thus the method can separate the real flame from a glittery vehicle lighting in a tunnel, greatly reduce the false alarm rate, and achieve the aim of fire hazard monitoring.

The invention discloses a video image processing-based fire detection system and detection method. A video acquisition module, a fire detection module, a fire analysis module, a fire judgment module and a fire alarm module are connected with one another so as to form the video image processing-based fire detection system; the video acquisition module acquires video images in the coverage area of a camera; the fire detection module performs background modeling and background updating on the video image and detects a foreground moving object; the fire analysis module analyzes the video images to identify a suspected flame region and extracts static characteristics and dynamic characteristics of the suspected flames; the fire judgment module adopts the static characteristics and dynamic characteristics of the suspected flames extracted by the fire analysis module as the input of a BP neural network so as to judge whether flames exist in a video; and the fire alarm module judges whether to give an alarm according to the output result of the fire judgment module. With an existing monitoring system used in combination, the video image processing-based fire detection system can decrease detection cost and greatly reduce a false alarm rate with fire detection accuracy ensured.

The invention discloses an embedded type fire control data transmission device and a realizing method thereof. In the device, fire control data of a fire automatic alarm mainframe are collected through a serial communication interface by using an external serial communication interface, detailed data of monitored equipment are obtained through directly analyzing a data communication protocol of the fire detection alarm mainframe, and the obtained fire control data are converted into a unified data format and remotely transmitted to a remote monitor center through networking, therefore, a communication protocol, data formats and the like of the fire detection alarm mainframe for uploading the fire control data are unified, networking communication between the fire detection alarm mainframe and the remote monitor center is better realized, and construction costs of programs such as installing, wiring, debugging and the like of the whole city fire automatic alarm remote monitor system are greatly saved.

The invention discloses an on-site hot smoke test equipment and method for subway stations and inter-station tunnels. The system comprises ignition source systems, data acquisition systems, and a data processing system, wherein the ignition source systems are arranged in the subway stations and the tunnels to simulate a fire scene; the data acquisition systems are arranged in the platforms and the concourses of the subway stations, the station tunnels and the inter-station tunnel to collect the following information in the fire scene, such as temperatures, gas concentrations, gas velocities, images, thermal images, smoke heights and system linked time; and the data processing system is connected with the data acquisition systems and processes the data information collected by the data acquisition systems, obtains the evaluation indicative data about work effects, reliability and linkage conditions of the fire detection and warning systems, the ventilation and smoke removal systems, the emergency lighting systems, the exit passageways and the exit signs in the platforms and the concourses of the subway stations and the inter-station tunnels, and judges whether the individual fire fighting systems can ensure the safe escape of passengers in the fire accident. The on-site hot smoke test equipment and method can provide reasonable and correct scientific evidences for subway construction, system debugging and transport safety.

The invention discloses a visualized phase-array fire alarm system which comprises a detection terminal and a monitoring terminal, wherein the detection terminal comprises a thermal radiation array sensor, a visible light camera, an external alarm data interface module and a signal composite processing transmission module, the monitoring terminal is composed of a data storage processor and a display or a computer with a display screen, and the detection terminal is connected to the monitoring terminal through a signal wire. The invention provides a visualized phase-array fire alarm system which is based on a complicated environment, regionally detects and displays temperature changes, regionally sets up alarm parameters, is compatible with various fire detection signal data and low in cost, and has a self-learning function; and according to the invention, the early property, visualization, intelligentization and systematization of fire alarming are realized, and the false alarm rate and cost of the system can be greatly reduced, thereby reducing the fire loss.