11results about "Fire alarm mechanical actuation" patented technology

The application discloses a comprehensive linkage alarm system for fire hazards and structure instability of timber buildings, and relates to the technical field of timber safety monitoring, which comprises the following modules: a multi-dimensional heterogeneous signal acquisition module for collecting data and constructing real-time state monitoring data sets; a structure spectrum benchmark modeling module for constructing a thermal-rigidity attenuation theoretical model; a thermal-frequency correlation analysis module for generating a thermal-frequency deviation degree index; a structure state determination module for identifying timber pyrolysis states and structure instability risks; a cascade response module for executing corresponding fixed-point spraying control, evacuation path planning and alarm output; and a self-adaptive feedback correction module for warehousing data and correcting thermal aging parameters. The application establishes a correlation model of thermal and rigidity by fusing thermal imaging and vibration data, effectively eliminates environmental wind load noise, realizes accurate identification of internal hazards of timber buildings, and improves the accuracy of building monitoring and the efficiency of emergency response.

Single use and replaceable self-powered aircraft compartment thermal indicators that deliver a localized visually detectable signal that can be perceived by personnel at the exterior of an aircraft component and that can be activated on demand to signal the presence of a temperature within an aircraft compartment that exceeds a threshold temperature and that can be tested in situ, and methods of use are disclosed.

Single use and replaceable self-powered aircraft compartment thermal indicators that deliver a localized visually detectable signal that can be perceived by personnel at the exterior of an aircraft component and that can be activated on demand to signal the presence of a temperature within an aircraft compartment that exceeds a threshold temperature and that can be tested in situ, and methods of use are disclosed.

The application discloses a kind of ship communication control method, device, equipment, medium and product.The method comprises: before the communication link of ship end and shore end is established, the digital certificate of ship end and shore end is verified, and identity authentication is carried out, after digital certificate verification passes and identity authentication passes, the communication link between ship end and shore end is established;After the communication link of ship end and shore end is established, temporary session key is generated, and temporary session key is divided into multiple key fragments, each key fragment is stored in multiple blockchain nodes;During the message transmission process of ship end and shore end through communication link, control ship end and shore end respectively obtain key fragment from blockchain node, recombine and restore to obtain temporary session key, and transmit after the transmission message is encrypted based on temporary session key.The technical scheme of the application can reduce the risk of eavesdropping, tampering and camouflage attack faced by remote control data in the transmission process of ship communication.

The invention relates to the technical field of fire early warning of flame-retardant crawler belts, in particular to a fire early warning device of a flame-retardant crawler belt, which comprises a machine body, a plurality of collecting rollers are fixedly connected to the back wall of the machine body, and a plurality of optical fibers are fixedly connected to the back wall of the machine body; positioning mechanisms are arranged on the collecting rollers, each positioning mechanism comprises a lifting ring, an inflator pump and a positioning magnet, a supporting plate is fixedly connected to the top end of each inflator pump, a round rod is fixedly connected to the top end of each supporting plate, and an abutting ball is fixedly connected to the top end of each round rod; the optical fiber winding device has the advantages that loosening, collapsing and disordered arrangement of optical fibers are effectively avoided, a regular winding state is kept, excessive bending of the optical fibers caused by loosening is reduced, mutual friction and displacement of the optical fibers caused by external vibration are avoided, and the optical fibers can be effectively wound through the flexible buffering effect of the air bag. Direct impact force of external collision and extrusion on the optical fiber is offset, and abrasion of an optical fiber sheath and damage to an internal fiber core are reduced.

The utility model relates to the technical field of smoke alarm, specifically relates to a kind of quick wiring smoke alarm, including upper shell and lower shell, smoke alarm module is equipped between the two, and smoke alarm module includes circuit board, smoke sensor, buzzer and quick wiring device, quick wiring device includes terminal block, wiring terminal module and gland, multiple wiring terminal module are sequentially spaced in terminal block, wiring terminal module includes terminal block and the wire clamping spring in terminal block, the one end of wire clamping spring is formed with wire clamping site, two wire clamping sites are equipped with the force receiving site for receiving external pressing force between them;Wire clamping spring is also equipped with tear site, tear site is located in the middle of force receiving site, to separate force receiving site into two parts, simultaneously, two wire clamping sites are separated. Since two wire clamping sites are separated by tear site, two wire clamping sites can respectively produce adaptive deformation according to the thickness of connected wire, so that two wire clamping sites can simultaneously clamp different thickness of wire.

The invention discloses a comprehensive linkage alarm system for wood structure building fire hazard and structure instability, and relates to the technical field of wood structure safety monitoring, and the system comprises a multi-dimensional heterogeneous signal collection module which collects data and constructs a real-time state monitoring data set; the structure frequency spectrum benchmark modeling module is used for constructing a heat-rigidity attenuation theoretical model; the heat-frequency correlation analysis module is used for generating a heat-frequency deviation index; the structure state judgment module is used for recognizing the wood pyrolysis state and the structure instability risk; the cascade linkage response module is used for executing corresponding fixed-point spraying control, evacuation path planning and alarm output; and the self-adaptive feedback correction module is used for storing the data and correcting the thermosensitive aging parameters. By fusing thermal imaging and vibration data, a correlation model of heat and rigidity is established, environmental wind load noise is effectively eliminated, the internal hidden danger of the wood structure building is accurately identified, and the accuracy of building monitoring and the emergency response efficiency are also improved.

The invention relates to an aircraft cabin overheating indicator, system and method. A disposable and replaceable self-powered aircraft cabin thermal indicator that delivers a local visually detectable signal that can be perceived by a person external to an aircraft component, and a method of using the same are disclosed. And can be enabled as needed to signal the presence of a temperature in the aircraft cabin exceeding a threshold temperature, and can be tested in situ.

The utility model discloses a cable trench fire extinguishing device and a cable trench fire extinguishing system, and the cable trench fire extinguishing device comprises a fire extinguishing agent container, a fire detection tube, an alarm device and a pressure gauge, the fire extinguishing agent container is installed in a cable trench and used for storing a fire extinguishing agent and driving gas, and a bottle opening of the fire extinguishing agent container is sealed through a bottle head valve. The head end of the fire detection tube is connected with the bottle head valve, the tail end of the fire detection tube extends into a cable trench and is mounted above a cable along a cable laying path, and a temperature blasting threshold value is set on the tube wall of the fire detection tube; the alarm device is electrically connected with the bottle head valve and is used for sending out a sound-light alarm signal when the bottle head valve acts; and the pressure gauge is arranged at the tail end of the fire detection tube and is used for detecting the pressure change of the system. According to the technical scheme, the fire extinguishing efficiency of the cable trench can be improved.

The utility model discloses a frame structure of a two-wheeled electric vehicle, and relates to the field of electric vehicle frames. The utility model provides a frame structure of a two-wheeled electric vehicle capable of extinguishing fire, which comprises a frame main body fixedly connected with a battery box, and further comprises a compressed air tank fixedly connected with the battery box, an air delivery pipe is communicated between the compressed air tank and the battery box, and a trigger assembly is arranged on the air delivery pipe. The triggering assembly is used for connecting the gas conveying pipe when a fire breaks out. When the battery box is on fire, the gas conveying pipe is communicated through the triggering assembly, so that the fire extinguishing gas in the compressed gas tank can enter the battery box through the gas conveying pipe, the fire extinguishing gas is used for extinguishing the fire of the battery box, and the purpose of extinguishing the fire is achieved.

The aircraft compartment is equipped with a self-generating thermal indicator that is activated when exposed to or otherwise encountered ambient temperatures exceeding a selected threshold temperature, and is visible in at least one area from and outside the aircraft. [Solution] A single-use, replaceable, self-generating aircraft compartment thermal indicator provides a localized, visually detectable signal that can be perceived by personnel outside the aircraft's components, is activated to signal on demand the presence of temperatures in the aircraft compartment exceeding a threshold temperature, and can be tested in situ.