177 results about "Fire alarm system" patented technology

The invention relates to the technical field of fire alarm systems, in particular to a distributed intelligent smoke monitoring and alarm management system, which comprises a data acquisition and trend analysis module for analyzing a smoke concentration change trend and generating a preliminary early warning signal based on real-time data acquired by a smoke sensor; the method specifically comprises the steps that the smoke concentration value Cs (t) of a smoke sensor in the time sequence is obtained, the average value Cmean and the standard deviation Std of the smoke concentration values in the current period are calculated, the upper limit threshold value and the lower limit threshold value of the smoke concentration are determined according to the formulas that Threshold High = Cmean + K1 * Std and Threshold Low = Cmean-K2 * Std, K1 and K2 are adjustment coefficients and are used for weighing sensitivity, when Cs (t) exceeds Threshold High or is lower than Threshold Low, preliminary early warning is triggered, and when Cs (t) is larger than Threshold Low, the smoke concentration is not subjected to early warning. The system analyzes the smoke concentration trend in real time, filters interference, links environment variables to adjust threshold values, performs multi-stage filtering, performs self-learning optimization, performs intelligent hierarchical scheduling, and efficiently prevents and controls fire disasters.

The invention discloses a method for effectively studying and judging false alarm of a fire alarm system in a transformation power station in a multi-dimensional mode, and the method comprises the steps: collecting and fusing multi-channel sensor data, such as smoke concentration, temperature, humidity, electromagnetic field intensity, grounding state and the like, and constructing a scenarized data set in combination with an environment label and an operation and maintenance log; through multi-level feature processing such as normalization, wavelet denoising and dimension reduction, the data quality and discriminability are improved; according to the method, the space-time diagram neural network is used for achieving multi-period environment subarea and typical signal mode division, multi-period fusion confidence judgment is conducted on alarm signals based on the fuzzy set theory and Bayesian reasoning, dynamic judgment of false alarms and real alarms is achieved, and the accuracy and robustness of alarm judgment in the complex environment are effectively improved.

The invention provides a ship unmanned aerial vehicle cabin multistage fire alarm system and method based on edge computing, and the system comprises an intelligent shipborne system and a shore-based cloud system, the intelligent shipborne system is disposed in a ship cabin, and has the functions of data collection, data abnormity perception, fire monitoring and multistage early warning; the method is composed of three levels of data acquisition, edge processing and fire decision making. The shore-based cloud system is a cloud end of a shore-based system arranged on the land, has the functions of transmitting and receiving distress signals, storing remote data and tracing large fire accidents, and is composed of a communication unit, a storage unit and an alarm unit. The intelligent ship-borne system is connected with the shore-based cloud system through the satellite communication technology, infrared thermal imaging and multi-source sensing fusion is achieved, the device has the edge processing capacity, the multi-level fire judgment logic and the shore-based remote traceability function, and the device is suitable for the closed, complex and unattended ship engine room environment.

To enable obtaining a smoke sensor that can prevent erroneous sensing of smoke.SOLUTION: A smoke sensor (100) comprises: a smoke sensing part (50) for sensing smoke generated in a monitoring area to output a smoke sensing level indicating concentration of the sensed smoke; and a state monitoring part (20) for monitoring a state of an inner face of a flow channel (41) for allowing air in the monitoring area to pass through the smoke sensing part (50), or an object face (31) as a face of an interior of the smoke sensing part (50). The state monitoring part (20) has: a monitoring light-emitting part (21) for emitting light toward the object face (31); and a monitoring light-receiving part (22) for receiving reflected light of light emitted from the monitoring light-emitting part (21), from the object face (31) to output a light-receiving level indicating intensity of the received light as a monitoring light level.SELECTED DRAWING: Figure 2

The invention discloses an Internet of Things networking scheduling method for railway tunnel disaster prevention illumination and evacuation indication, and relates to the technical field of railway tunnel disaster prevention. Comprising the following steps: S1, tunnel end monitoring equipment actively initiates environmental channel detection through a power line carrier communication network, scans impedance characteristics, noise levels and attenuation characteristics of different line sections in a tunnel, establishes a dynamic channel fingerprint database, and records an optimal communication frequency point and a channel quality threshold; and S2, performing real-time linkage between the local center monitoring main station and a fire alarm system, and after receiving a fire alarm signal, immediately generating a dynamic evacuation path through a disaster evolution prediction model according to a fire alarm position, a smoke diffusion state and a real-time channel state. The power line carrier communication module is utilized to actively perform channel detection and electrical parameter acquisition, a state channel fingerprint database is established, and fault diagnosis and state grading are performed based on the state channel fingerprint database, so that the overall reliability and maintainability of the scheme are improved, and the availability of equipment in a disaster is ensured.

The invention discloses a remote video intelligent analysis and fire alarm system for a wind power photovoltaic station, relates to the technical field of video analysis, and solves the problem of insufficient comprehensiveness of a mode of identifying abnormity by adopting a single threshold value or a simple image difference method. According to the method, different recognition modes are executed based on the brightness difference, if the brightness difference is large, verification analysis is performed on the value difference characteristics of adjacent pixel points, and the abnormal pixel points existing in each array are calibrated in sequence based on the actual verification processing result, so that the corresponding abnormal contour is quickly locked in the state that the brightness is changed, and the accuracy of the abnormal contour is improved. If the brightness difference is small, difference processing of pixels at the same position is directly carried out on the two sets of frame pictures, the abnormal contour is directly locked, and the classification processing mode can effectively guarantee that abnormal features can be rapidly locked in different brightness environments, and the comprehensiveness in the video analysis process is guaranteed.

The invention, which belongs to the technical field of fire protection, provides a comprehensive management system for fire protection and security, and the system comprises a plurality of fire-fighting sensing devices which are respectively arranged at different fire-fighting sites and are used for collecting video image data of the different fire-fighting sites; the server is in communication connection with the plurality of fire-fighting sensing devices, and is used for performing time synchronization processing on the video image data acquired by the plurality of fire-fighting sensing devices, fusing the synchronized video image data to obtain a fused image, extracting a region of interest in the fused image, and sending the extracted region of interest to the fire-fighting sensing devices; identifying a risk level of a fire corresponding to the region of interest, and sending an early warning instruction when the risk level exceeds a first preset level; and the monitoring terminal is in communication connection with the server and is used for giving an alarm based on the early warning instruction. The technical problems that an existing fire alarm system is prone to false alarm and low in fire recognition precision can be solved.

The invention relates to the technical field of early warning management platforms, and particularly discloses a whole-plant comprehensive early warning management platform and method based on multi-source heterogeneous data fusion, and the platform comprises an image data collection layer, a data governance layer, an early warning analysis layer, an application interaction layer, and a safety protection layer. The image data acquisition layer covers data of the DCS system, the NCS system, the field inspection system, the fire alarm system, the video monitoring system and the intelligent monitoring system; the early warning analysis layer realizes alarm grading through a three-stage process of weight calculation, severity evaluation and score correction; and the application interaction layer is linked with the early warning analysis layer, a differential push strategy is triggered according to an alarm level, and the security protection layer meets the requirements of national energy group network security level protection of three levels or above. The core technical scheme (such as data atlas construction logic, an early warning algorithm model and a safety protection mechanism) of the method is not limited to specific unit types, and can be flexibly adapted to different types of thermal power projects such as gas turbines and coal-fired units with the capacity of 300MW-1000MW.

The invention relates to the technical field of environment control and multi-system cooperative linkage of flight simulation training equipment, provides a full-motion simulator environment intelligent joint control method, system and equipment and a storage medium, and solves the problems of low intelligent level and poor emergency response efficiency of multi-system cooperative control. The method comprises the following steps: acquiring operation data and basic environment parameters of each subsystem in an environment joint control system in real time through a multi-dimensional environment sensing network, carrying out fusion and state analysis, and identifying security abnormity, smoke simulation triggering or subsystem faults; when the abnormal signal is recognized, generating a corresponding linkage control instruction by using a logic control algorithm, and issuing the instruction to external systems such as a power supply, a gallery bridge, a movement system, a fire alarm system and the like and an IOS teacher platform through a cross-system joint control mechanism; the system receives an external feedback signal in real time, dynamically adjusts a cooperative control strategy, and constructs a closed-loop intelligent joint control system. According to the invention, the intelligent level and the emergency response efficiency of multi-system cooperative control are improved.

The invention provides an automatic fire alarm system maintenance management method, system and device and a storage medium, and relates to the technical field of safety management, and the method comprises the steps: obtaining the first position information and environment information of a target detector in an automatic fire alarm system of a chemical plant; determining the importance level of the target detector according to the first position information, and determining a first inspection plan of the target detector according to the importance level; acquiring working parameters of the target detector, and generating an attenuation coefficient of the target detector in combination with the environment information and the working parameters; adjusting the first inspection plan according to the attenuation coefficient to generate a second inspection plan; and obtaining a third inspection plan and second position information of the associated detector of the target detector, adjusting the second inspection plan in combination with the third inspection plan and the second position information, and generating a target inspection plan of the target detector. The technical effect of the invention is that the utilization efficiency of inspection resources is improved.

The invention relates to the technical field of photovoltaic power station fire fighting, and discloses a distributed photovoltaic power station fire fighting alarm system based on big data. A data acquisition module of the system collects real-time operation data, environment monitoring data and thermal imaging data of a photovoltaic module; the hot spot identification module identifies a potential hot spot area and an abnormal temperature rise trend in combination with multiple types of data; the risk range determination module determines component-level, string-level and unit-level thermal risk influence ranges based on the topological knowledge graph; the monitoring area division module divides a global monitoring area and a local fine monitoring area according to a risk range and a fire-fighting specification; and the risk prediction and alarm module performs fire risk prediction based on the monitoring area data and generates graded alarm information. According to the system, through multi-source data fusion, accurate risk definition, monitoring layout optimization and graded alarm, the comprehensiveness and timeliness of distributed photovoltaic power station fire-fighting monitoring are improved, and the operation safety of the power station is guaranteed.

1. The name of the design product: graphical user interface of configuration gas fire extinguishing controller and fire alarm controller for electronic equipment. 2. The use of the design product: for electronic equipment. 3. The design points of the design product: in the graphical user interface. 4. The picture or photo that best shows the design points: design 1 front view. 5. Design 1 is designated as the basic design. 6. The use of the graphical user interface: adjustment configuration of functions of the fire alarm system. 7. The human-computer interaction mode of the graphical user interface: design 1 front view shows the interface of the new device of project programming of the fire alarm system, by clicking the drop-down arrow of the "device type" column box, design 1 change state diagram 1 is entered to select the device type; after selecting the device type, by clicking the "new" button in design 1 front view, design 1 change state diagram 2 showing the "controller" module is entered. Design 2 front view shows the interface of the "loop" module of project programming of the fire alarm system, by clicking the "point view" button on the right side of an item, design 2 change state diagram is entered. Design 3 front view shows the interface of the "controller" module of project programming of the fire alarm system, by clicking the "gas extinguishing controller" button, design 3 change state diagram is entered. Design 4 front view shows the interface of the "linkage logic" module of project programming of the fire alarm system, by clicking a check box in "zone A", design 4 change state diagram 1 is entered; by selecting "linkage equation" in the column box below "linkage mode", design 4 change state diagram 2 is entered; by clicking the "details" on the right side of a label (for example, general linkage equation 001), design 4 change state diagram 3 is entered. Design 5 front view shows the interface of the "main mapping list" module of "Modbus" of project programming of the fire alarm system, by clicking the "backup mapping list" button, design 5 change state diagram is entered, and design 5 front reference diagram is used to show that design 5 front view can have a drop-down interface. Design 6 front view shows the interface of the "database upgrade and download" module of the connected device of the fire alarm system, by clicking the "upgrade controller firmware" button, design 6 change state diagram 1 is entered; by clicking the "history record export" button, design 6 change state diagram 2 is entered. 8. Other circumstances that need to be explained: other views are omitted. The symbol "X" in the interface views of design 1 to design 6 indicates that the content such as text, symbol, icon, etc. can be changed or replaced.

1. The name of the design product: fire detector relay. 2. The use of the design product: for realizing the connection and signal relay function of fire alarm system components. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The invention discloses an inspection method, system and device for a fire alarm system, relates to the technical field of fire safety, and solves the technical problems of low inspection efficiency and resource waste caused by the fact that a fixed period polling mode is generally adopted in the prior art, a large amount of redundant communication is generated, and system bandwidth and computing resources are occupied. A to-be-queried queue is constructed based on a state response result; generating an inspection result in an instruction sending mode based on the state type in the queue to be queried; based on the real-time load and the load change trend of the to-be-queried queue, an inspection cycle is generated in a self-adaptive mode, lightweight state response results of all fire-fighting components are rapidly obtained through the variable inspection cycle, then the to-be-queried queue is constructed only for the components with the state changed, and refined detailed state query is carried out. And finally, the next inspection period is dynamically and adaptively generated according to the load condition of the queue, so that the generation of redundant data is eradicated from a communication mechanism, and the problems of low inspection efficiency and resource waste are solved.

The present application relates to the technical field of early warning management platform, and specifically discloses a multi-source heterogeneous data fusion full-plant comprehensive early warning management platform and method, which comprises an image data acquisition layer, a data management layer, an early warning analysis layer, an application interaction layer and a security protection layer; the image data acquisition layer covers DCS system, NCS system, field inspection system, fire alarm system, video monitoring system and intelligent monitoring system data; the early warning analysis layer realizes alarm grading through three-level processes of weight calculation, severity evaluation and score correction; the application interaction layer is linked with the early warning analysis layer, and triggers a differentiated push strategy according to the alarm level; and the security protection layer meets the requirements of the third level and above of the national energy group network security level protection. The core technical scheme (such as data graph construction logic, early warning algorithm model and security protection mechanism) of the present application is not limited to a specific unit type, and can be flexibly adapted to different types of thermal power projects such as 300MW-1000MW capacity gas turbines, coal-fired units, etc.

The application provides a fire control method and device and electronic equipment, and relates to the technical field of nuclear power, and the method comprises the following steps: in the case that a fire alarm signal sent by a fire detector is received by a fire alarm system, the fire alarm system is used to send the fire alarm signal to a distributed control system (DCS); the fire alarm system is used to receive a device state control instruction sent by the DCS based on the fire alarm signal; and the fire alarm system is used to control the fire equipment to execute a fire operation indicated by the device state control instruction, wherein the fire equipment is the fire equipment indicated by the device state control instruction. According to the application, the fire alarm system is used to control the fire equipment to execute the fire operation, the fire alarm system can execute corresponding fire operations according to the device state control instruction of the DCS, and the fire safety of the nuclear power plant can be improved.

The invention discloses an integrated fire-fighting emergency linkage control system which comprises a data acquisition module, an evaluation analysis module, a linkage strengthening module and a feedback training module. The data acquisition module acquires operation data of a fire control room, an automatic fire alarm system and a linkage subsystem in real time through a multi-type sensor and a protocol conversion engine, and ensures that the time synchronization error is less than or equal to 1 microsecond; a four-dimensional evaluation model is built in the evaluation analysis module, the timeliness, integrity, compliance and normalization of operation behaviors are quantitatively evaluated by combining an analytic hierarchy process, and operation conflicts are processed through a rule engine; the linkage strengthening module executes control such as fire alarm timeout automatic alarm and misoperation locking based on the evaluation result; the feedback training module pushes personalized training content by means of digital twinning replay operation, the system forms closed-loop logic, and normalization and safety of fire emergency operation are improved.

The invention is a method for automatically identifying a fire alarm system (10) connected to a transmission line (14) by evaluating so-called floor plan data on the one hand and measuring along the transmission line (14) on the other hand.

Embodiments of the present application provide a fire alarm control circuit for a rail vehicle, a safety loop system, and a rail vehicle. When a first network is normal, a fire alarm test signal is output to a fire alarm controller, and the fire alarm controller performs a fire alarm test on the basis of the fire alarm test signal. When a test result of a fire alarm test circuit is normal and a second network is normal, a fire alarm activation circuit is activated, wherein the fire alarm activation circuit comprises a second network module and a fire alarm control relay. When the fire alarm activation circuit is activated, normally open contacts of the fire alarm control relay are closed, and self-locking contacts of a fire alarm relay are powered and self-locked. In this way, testing and activation before fire monitoring are completed, making preparation for a fire alarm system to subsequently enter a working state. Additionally, when a fault occurs in the test of the fire alarm system, a fault condition can be known in a timely manner, and the activation of the system can be suppressed in a timely manner, thereby reducing the impact on other systems affected by fire alarm signals, increasing safety coefficients of rail vehicles, and providing a guarantee for the safe operation of trains.

Example implementations include a method, apparatus and computer-readable medium for smoke detection using a smoke detector / fire alarm system implemented as a beam receiver and beam transmitter. In some examples, the beam receiver is configured to receive a plurality of beam pairs including a first beam pair, wherein each beam pair is received via one of a plurality of receive elements, and wherein the first beam pair is received via a first receive element and comprises a first beam and a second beam. In some examples, the beam receiver is further configured to compare a first delta between the first beam intensity and the second beam intensity at the first time instance with a second delta between the first beam intensity and the second beam intensity at the second time instance to determine whether to perform an action.

The invention relates to the technical field of internet-of-things fire alarm systems, and particularly discloses an internet-of-things-based novel fire-fighting spraying system, which comprises a nozzle and a movable spraying mechanism, the movable spraying mechanism is mounted at the top of a shed and is provided with a rack and a movable motor, a gear is mounted on a motor shaft of the movable motor, and the movable motor is connected with the rack. The gear is meshed with the rack, the moving motor is installed on the sliding base, and the sliding base moves along the optical axis. A nozzle is mounted at the bottom of the sliding seat and provided with an inner pipe and an outer barrel cover, a moving head is movably arranged in the outer barrel cover, water pressure of the inner pipe impacts the moving head to move, an adjusting cover is mounted at the end of the moving head, and a gap between the adjusting cover and the outer barrel cover forms an annular water mist outlet; whether a fire source exists in the charging shed or not is monitored through the camera and the sensor group, an alarm is given and the power supply of the charging shed is cut off at the first time after the fire source is found, large-area diffusion of a battery fire is avoided, good cooling, isolation and fire extinguishing effects are achieved, and property loss and fire risk are greatly reduced.

The invention provides a fire alarm, a spraying pollution self-checking method and a fire alarm system. The fire alarm comprises a bottom shell, a surface shell, a button and a sounder. The face shell is installed on the bottom shell, a through hole is formed in the face shell, the button is arranged in the through hole in a pressing mode, the sounder is installed on the side, facing the bottom shell, of the face shell, and a sounding hole is formed in the sounder; wherein a sound producing gap is formed between the hole wall surface of the through hole and the outer peripheral surface of the button, and the sound producing gap is communicated with the sound producing hole. The sounder of the fire alarm can make a sound by means of the gap between the button and the face shell, no sound hole needs to be additionally arranged, the design cost and the processing cost are reduced, the risk that pollutants enter the alarm main body can be reduced, and the alarm effect of the fire alarm is improved.

Some embodiments of the teachings herein include a method for recording measurement values relating to a fire characteristic variable indicating a potential fire incident and detected by a fire alarm device. An example includes: supplying energy to a central fire alarm system with a plurality of fire alarm devices connected via a common detector line for data transmission purposes; temporarily storing measurement values, if a current measurement value exceeds a threshold value indicating a potential fire incident, as a log recorded in a data memory of the respective fire alarm device; forming an incident data record upon completion of the recording from the respective measurement values together with header data; and transferring an incident data record by the respective fire alarm device in a temporally distributed manner and using multiple data transmission blocks released by the central fire alarm system to the central fire alarm system.

The utility model relates to the technical field of encoders, and particularly discloses an address encoder of a fire alarm system product, which comprises a shell, a main control circuit board is arranged in the shell and comprises a DC-DC conversion circuit, a 12V booster circuit, a 24V booster circuit, a signal sampling circuit, an amplifying circuit and a signal comparison circuit, the DC-DC conversion circuit is respectively and electrically connected with the signal sampling circuit and the 12V booster circuit, and the amplification circuit is respectively and electrically connected with the 12V booster circuit, the 24V booster circuit and the signal comparison circuit. According to the utility model, the signal sampling circuit is arranged to receive the input voltage, the voltage is maintained at the output end until the next sampling is started, the function of monitoring the voltage of the battery is realized, and the output power of the signal is increased through the amplifying circuit, so that the waveform of the output signal is controlled to be consistent with that of the input signal, but the amplitude is larger; therefore, an output signal stronger than an input signal is obtained, and the working stability is improved.

Described herein are devices, methods, and systems for extending a fire protection loop. An example device for a fire alarm system includes: a first communication path coupled to a first plurality of fire-sensing devices wired in a first loop; a second communication path coupled to a second plurality of fire-sensing devices wired in a second loop, wherein the second loop is independent of the first loop; and a controller configured to: drive the second plurality of fire-sensing devices of the second loop; and drive the first plurality of fire-sensing devices of the first loop during an occurrence of a failure event on the first loop.

This application discloses a system, method, apparatus, medium, and program product for implementing multiple monitoring centers in a fire alarm system. The system includes: a fire alarm system equipment layer; a main monitoring center; at least one backup monitoring center; and a proxy module for establishing an indirect communication connection between the fire alarm system equipment layer and the at least one backup monitoring center, synchronizing data from the fire alarm system equipment layer with the main monitoring center, and scheduling and distributing the data to each backup monitoring center. The technical solution in this application can implement multiple monitoring centers without loss of resources, configuration, or additional physical wiring at the fire alarm system equipment layer.

The application discloses a kind of fire automatic alarm system graph generation method and system for ring connection, specifically relates to engineering system graph generation technical field, and its technical points are: in the connected equipment set of visited wire and cable, extract an unvisited plane electrical equipment, and successively access and record all plane electrical equipment and wire and cable on the ring line containing the plane electrical equipment;After accessing and recording complete all ring lines of one fire terminal box, then access the next fire terminal box of connected wire and cable set not empty;After accessing all connected wire and cable set not empty fire terminal box, based on all plane layout equipment and wire and cable accessed, generate a result dictionary with plane layout equipment category as key, with the number of each category of plane layout equipment as value, and generate fire automatic alarm system graph using result dictionary.

The utility model discloses a fire alarm wireless device, relates to the technical field of fire alarm wireless device structures, and aims to solve the problems that an existing wireless fire alarm device is not provided with a remote alarm function, so that a GIS (Geographic Information System) area fire alarm system cannot be monitored, and the fire alarm system cannot find a fire at the first time. Mounting clamping seats are arranged at the two ends of the mounting seat, a limiting sliding seat is arranged in the rear end of the mounting seat, a bayonet socket is arranged at the front end of the mounting seat, a wireless signal transmitter is mounted on one side of the bayonet socket, and a fire alarm is mounted below the wireless signal transmitter; a protective mounting box is mounted on one side of the mounting base, fixing buckles are arranged at the two ends of the protective mounting box, heat dissipation blocks are arranged at the upper end and the lower end of the protective mounting box, a through groove is formed in the upper end of the protective mounting box, and the fixing buckles and the protective mounting box are of an integrated structure.

The present application relates to action sensing mechanism, fire extinguishing device, fire alarm system and control method, the action sensing mechanism includes: temperature sensing trigger unit, including contact connection temperature sensing assembly and sliding assembly, the temperature sensing assembly supports and positions the sliding assembly under the condition that the ambient temperature where it is located is lower than the set temperature, and is separated from the sliding assembly under the condition that the ambient temperature reaches the set temperature;Detection unit is connected with the sliding assembly, and is used for detecting the displacement signal of the sliding assembly;The control module of the control unit is connected with the detection unit, the control module is connected with the intelligent terminal through the wireless communication module, the control module is configured to receive the displacement signal detected by the detection unit and convert the displacement signal into alarm information, and the alarm information is sent to the intelligent terminal through the wireless communication module.The present application can remotely alarm when fire occurs, so that the user or the fire department can timely understand the fire and quickly carry out fire extinguishing and rescue, and effectively reduce the loss of life and property of the user.

To obtain a fire alarm system with a configuration that simplifies the installation work of controlled devices that operate in conjunction with the detection results of detectors compared to conventional systems. [Solution] A fire alarm system comprising: a plurality of fire detectors installed in a fire monitoring area that detect the occurrence of a fire; a plurality of controlled devices that operate in conjunction with the detection results of each of the plurality of fire detectors; and a fire receiver that issues a fire alarm based on the detection results of each of the plurality of fire detectors and outputs a control command to execute the linked operation control of the linked controlled device based on the detection result of the fire detector that is the source of the connection, further comprising a wireless power supply unit that executes linked operation control by wirelessly supplying drive power to the linked controlled device based on the control command output from the fire receiver.