76 results about "Heat detector" patented technology

The invention relates to the technical field of fire early warning, in particular to an early fire early warning system based on AI image recognition, and the system comprises an image collection module which is used for obtaining the video stream data of a monitoring area in real time; an AI image analysis module which is in communication connection with the image acquisition module and is used for receiving the video stream data and carrying out real-time analysis on video frames based on a pre-trained fire identification model so as to extract visual features related to the fire; and the early warning judgment module is in communication connection with the AI image analysis module and is used for receiving an analysis result of the visual features. According to the early fire early warning system and method based on AI image recognition, through video image analysis, the system can recognize weak flame or smoke characteristics at the initial stage of a fire and when naked eyes do not obviously see the characteristics, and the delay problem that a traditional smoke-sensing and temperature-sensing detector needs to wait for physical parameters to be diffused to the detector to be triggered is solved.

The invention discloses a water curtain and flame-retardant curtain synergistic smoke and heat insulation device and a fire prevention and control method, the water curtain and flame-retardant curtain synergistic smoke and heat insulation device comprises a fireproof separation water curtain unit arranged along the junction of adjacent fireproof units, flame-retardant curtains symmetrically arranged on the two sides of the fireproof separation water curtain unit, and an induction unit; the induction unit comprises a controller, a heat-sensitive sensor, a smoke detector and a heat detector, the heat-sensitive sensor is arranged on the flame-retardant curtain, the smoke detector is further arranged on one side of the flame-retardant curtain, and the heat detector linked with the flame-retardant curtain is arranged in the fireproof unit; and the controller is used for controlling the working states of the fireproof separation water curtain unit and the flame-retardant curtain. Through intelligent linkage control of the detector, the flame-retardant curtain and the fireproof separation water curtain unit are started to operate in stages and scenes, the coping efficiency at the initial stage of a fire disaster is improved, smoke diffusion can be effectively controlled, spreading of the fire disaster in the underground garage can be blocked, and a safe space is created for personnel evacuation and fire disaster suppression to the maximum extent.

The application provides a method for improving the execution precision of a reversible rough rolling mill tail short stroke, and relates to the technical field of industrial automation. The method sets three heat detectors at the entrance of the vertical roll mill, sets the short stroke parameters of the vertical roll mill at each pass tail when the slab is discharged, when the odd pass is detected, the first heat detector detects the loss, and the tail position is tracked according to the set vertical roll mill current pass back slip and actual speed; when the second heat detector detects the loss, the actual back slip value of the vertical roll is calculated according to the distance between the first two heat detectors and the tracking length, and the tracking length is corrected, and the tail is continuously tracked; when the third heat detector detects the loss, the back slip value and the tail tracking position are continuously corrected; when the distance between the tail and the vertical roll mill reaches the start distance of the short stroke, the vertical roll gap is adjusted according to the set value; when the tail leaves the vertical roll, the vertical roll mill keeps the current position until the tail of the steel plate leaves the flat roll mill. The method realizes the real back slip of the vertical roll mill through multiple heat detectors, and improves the tail tracking precision and the width control precision.

The application discloses a cable type linear heat temperature detector and particularly relates to the technical field of heat temperature detectors, comprising a processor, wherein a heat temperature sensing assembly is arranged on the processor; the heat temperature sensing assembly comprises a plurality of temperature sensing conductive ribs, a thermosensitive sensing core arranged in the temperature sensing conductive ribs, and a constant temperature galvanized steel wire end arranged at one end of the thermosensitive sensing core. The application sets a compensation wire between the metal woven mesh cover and the temperature sensing conductive rib, effectively compensates signal errors of the thermosensitive sensing core and the constant temperature galvanized steel wire end in the temperature detection process, effectively avoids false alarms or response delay problems caused by environmental fluctuations, and through a knob, a transfer pipe and an adjusting hole, the conductive core can be flexibly tightened, so that a plurality of temperature sensing conductive ribs are more tightly twisted. This not only enhances the integrity of the structure, but also ensures that heat can be quickly and uniformly transmitted to the thermosensitive sensing core in the sensing section, thereby greatly improving the response speed of the detector and the authenticity of temperature sensing.

The invention relates to a thermal detector comprising: - a reading substrate (10) comprising a reading circuit; - an absorbent membrane (40) comprising a thermometer transducer (44) electrically connected to the reading circuit, - anchoring pillars (20) and holding arms (30) for: keeping the absorbent membrane (40) suspended above the reading substrate (10); thermally insulating the absorbent membrane from the reading substrate (10); and electrically connecting the thermometer transducer (44) to the reading circuit; the holding arms (30) being formed from a stack of at least one portion (51b; 53b) of an insulating thin film (51;53) made of a thermally insulating material, and at least one portion (52b) of a conductive thin film (52) made from an electrically conductive material. The insulating thin film (51;53) is made of amorphous boron.

The invention relates to a thermal detector with a suspended absorbing membrane, which comprises at least two absorbers (31, 32). The second absorber (32) is adapted to absorb electromagnetic radiation in a spectral sub-band Δλ2 of a predefined spectral band Δλtot, centered on a wavelength λc2. In addition, it is spaced from a reflector (12) of a value h2 equal to λc2 / 4neq2 so as to form therewith a quarter-wave cavity C2 for the wavelength λc2, the spectral sub-band Δλ2 being centered on the wavelength λc2 which is equal to λc1 / 2 to within plus or minus 2 µm. Furthermore, the first and second absorbers (31, 32) have total surfaces such that a surface ratio S2 / S1 is between 0.5 and 3. Figure for the abstract: Fig. 2A

The present invention relates to the field of holmium laser technology, and specifically to a holmium laser with four rods arranged side by side in a common cavity, including a housing, and further including: four main bottom plates, the four main bottom plates are parallel to each other and are arranged side by side in pairs and movably arranged in the housing; a secondary bottom plate, the secondary bottom plate is located in the middle of the four main bottom plates and is parallel to the main bottom plates; a scissor-type moving mechanism, the scissor-type moving mechanism is arranged in the housing and is connected to the secondary bottom plate. When the main heat detector on a certain main bottom plate detects an abnormality, the scissor-type moving mechanism drives the secondary bottom plate to move to the original position of the main bottom plate, and pushes the main bottom plate to slide horizontally, so that the secondary laser cavity can replace the main laser cavity on the main bottom plate to continue working, so that the laser can output normally; at the same time, the main laser cavity on the main bottom plate stops working to reduce heat, thereby avoiding too high temperature inside the laser, greatly reducing the failure rate of the laser, and ensuring the stability and service life of the entire system.

The utility model discloses an independent temperature sensing fire detection alarm. Comprising a face shell, a bottom shell connected with the face shell in a threaded mode, a middle shell connected with the bottom shell in a buckled mode, a battery arranged on the middle shell, a PCB assembly arranged between the face shell and the bottom shell, a top shell and keys arranged on the face shell, a PCB arranged between the middle shell and the face shell, and a positive plate arranged on one side of the PCB, the negative plate is arranged on the other side of the PCB; the top shell is arranged at the top of the surface shell; the PCB is provided with a main control circuit, an NB module circuit, a sound output circuit, an indicating lamp circuit, a module firmware downloading circuit, an NB power supply control circuit, an SIM card circuit, a temperature detection circuit, a program downloading simulation circuit, an AT serial port circuit, an NB module reset wake-up enable circuit and an infrared transmitting and receiving circuit.

Described herein are apparatuses, systems, and methods for providing a surface mount thermistor based point heat detector. One circuit board for a point heat detector of a fire sensing system includes a circuit board body having a plurality of corners, at least one hole disposed in the circuit board body proximate one of the corners, and a surface mount thermistor mounted on the at least one corner.

The invention discloses a recoverable cable type linear temperature-sensitive fire detector for a power cable area, and belongs to the technical field of fire detection. Comprising a cable type linear temperature sensing element arranged along a power cable, the cable type linear temperature sensing element is connected with a signal processing unit, and the signal processing unit is connected with a cable fire monitoring and early warning unit; the cable type linear temperature sensing element comprises a plurality of temperature switches and conductors which are connected in series. The outer layer of the metal conductor is covered with an insulating material layer or an NTC characteristic material layer. The cable type linear temperature sensing element is designed to be of a recoverable structure. And the signal processing unit has a self-diagnosis function and is used for checking and reporting whether the cable type linear temperature sensing element is in a working state or not. The recoverable cable type linear temperature-sensitive fire detector has the remarkable beneficial effects of improving the fire early warning efficiency, enhancing the system reliability, reducing the cost, being easy to install and maintain, having wide applicability and the like.

The invention discloses a medium-long wave infrared multiband thermal detector and a detection method thereof, and belongs to the technical field of thermal detectors, the medium-long wave infrared multiband thermal detector comprises a box body, a sliding plate is slidably connected to the bottom of an inner cavity of the box body, a thermal detector is placed above the sliding plate, a door plate is rotatably connected to the outer side of the box body, and a limiting assembly is arranged at the top of the inner cavity of the box body. The middle-long wave infrared multiband thermal detector comprises a box body, a door plate is arranged in the box body, a limiting assembly is arranged in the box body, the limiting assembly penetrates through the box body and is connected with the door plate, a mounting box is fixedly connected to the lower portion of the box body, and a moving assembly is arranged in an inner cavity of the mounting box. The limiting plate can be automatically controlled to be attached to the upper portion of the thermal detector, so that the thermal detector is limited, the situation that the thermal detector collides with the inner wall of the box body due to vibration when the thermal detector is transported is avoided, the thermal detector is prevented from being damaged, and the service life of the thermal detector is prolonged.

A fan system comprises a hub, a plurality of fan blades, a drive system, and a stationary tube. The hub is configured to rotate. The fan blades are mounted to the hub. The drive system comprises a rotatable hollow output shaft. The hollow output shaft is in communication with the hub, such that the drive system is operable to rotate the hub via the hollow output shaft. The stationary tube is inserted through the hollow output shaft. The stationary tube is configured to remain stationary as the hollow output shaft rotates. Wires and the like may be passed through the stationary tube, to reach an accessory mounted at the bottom of the stationary tube. The fan system may also include a detector, such as a heat detector, a smoke detector, or an accelerometer. The detector may power down the fan system in response to detecting certain conditions.

To provide a heat sensor capable of eliminating the visual directivity of a display lamp.SOLUTION: A circuit board on which a heat sensitive element and a component constituting a circuit for detecting a fire are mounted is housed inside a housing including a main body case and a main body cover, and the circuit board is provided with a plurality of light emitting elements that emit light when a fire is detected, in a heat sensor including a display unit that displays detection of a fire by light emitted by a plurality of light-emitting elements, a heat-sensitive element is a thermistor, the display unit includes an insertion hole having an inner diameter larger than a diameter of the thermistor and a mortar-shaped display lamp unit that spreads from an edge of the insertion hole in a direction away from a circuit board, and the thermistor is mounted on the circuit board such that a distal end side of the thermistor penetrates the insertion hole. The plurality of light sources are installed so that the light-emitting parts are located closer to the circuit board side than the indicator lamp part and surround the thermistor, and the entire surface of the indicator lamp part emits light by the light emitted by the light-emitting elements.SELECTED DRAWING: Figure 6

To provide a heating tester and a heating test method for heat detectors capable of being preferably employed in a heating test to be conducted on a differential type heat detector or a compensation type heat detector including a high-temperature type.SOLUTION: In a heating tester 1 for heat detectors in which a test space where a test is conducted with a heat detector 20 located inside is created, a cooling space 3a to be cooled by cooling means 5a and a heating space 4a to be heated by heating means 5b are created as the test space.SELECTED DRAWING: Figure 1

The invention discloses a cable type linear thermal detector, and particularly relates to the technical field of thermal detectors, the cable type linear thermal detector comprises a processor, the processor is provided with a temperature sensing assembly, and the temperature sensing assembly comprises a plurality of temperature sensing conduction ribs, a thermosensitive sensing core arranged in the temperature sensing conduction ribs, and a constant-temperature galvanized steel wire end arranged at one end of the thermosensitive sensing core. According to the temperature sensor, the compensation wires are arranged between the metal woven mesh sleeve and the temperature sensing conduction ribs, so that the signal error of the thermosensitive sensing core and the constant-temperature galvanized steel wire end in the temperature detection process is effectively compensated, and the problem of false alarm or response delay caused by environmental fluctuation is effectively avoided; and the conduction core can be flexibly tensioned, so that a plurality of temperature-sensing conduction ribs are twisted more tightly. Therefore, not only is the integrity of the structure enhanced, but also the heat can be quickly and uniformly transmitted to the thermosensitive sensing core in the sensing section, so that the response speed of the detector and the authenticity of temperature sensing are greatly improved.

This article is a light-guiding member that is provided in a heat detector that detects heat caused by a fire and that guides light from a light-emitting element that lights up when a fire is alerted.

The invention relates to an improved response of a thermal detector with a surface mount thermistor. Apparatuses, systems, and methods are described herein for providing a surface mount thermistor based point heat detector. A point heat detector of a fire sensing system includes: a circuit board body having a plurality of corners; at least two surface mounted thermistors, each thermistor mounted on a different one of the corners; two of the surface-mounted thermistors are arranged in the middle of the surface-mounted thermistors; and a processor executing instructions stored in the memory to determine a temperature of at least one of the two surface mount thermistors and the intermediate position.

The present invention discloses a control method and system for an out-of-furnace heat preservation roller table. The method includes: arranging a first heat detector beside the starting roller of the heat preservation roller table and a second heat detector beside the end roller of the heat preservation roller table. The first heat detector is close to the heating furnace, and the second heat detector is close to the rolling mill; when the first heat detector detects a billet, switching the roller speed in the heating furnace to keep it synchronized with the speed of the heat preservation roller table; when the current billet enters the rolling mill along the heat preservation roller table and receives a signal of steel biting, switching the speed of the heat preservation roller table to keep it synchronized with the rolling mill speed; when the second heat detector detects the arrival of the falling edge of the signal, increasing the speed of the heat preservation roller table to make the next billet move forward quickly along the heat preservation roller table until the arrival of the next steel biting signal. By specifically adjusting the speed of the heat preservation roller table, the present invention avoids roller wear and power loss, saves the cost of replacing rollers and spare parts, and reduces work delays and time delays.

Methods for performing a compensation and heating process that compensates for the temperature of an environment around a heat detector (250) are provided. Corresponding heat detector testing devices (200) and non-transitory computer-readable mediums are also provided. In a further aspect, a method for calibrating a heat detector testing device is provided. A corresponding heat detector testing device and non-transitory computer-readable medium is also provided.

A thermal detection element according to an embodiment of the present technology includes a substrate and a plurality of thermal detectors. Each of the plurality of thermal detectors is disposed on the substrate. Each of the plurality of thermal detectors includes a first electrode, a second electrode disposed on the substrate, a thermoelectric converter disposed between the first electrode and the second electrode, and an absorber that is disposed on the first electrode, and absorbs infrared rays and generates heat. The absorber included in each of the plurality of thermal detectors is configured to be separated from the absorber of another one of the thermal detectors.

The invention relates to compensating in real-time for ambient temperature conditions (i.e. the environment surrounding the test device) during a test on a heat detector. Compensation is determined us

The utility model relates to the technical field of data encryption operation, in particular to an expandable service terminal for data encryption operation, which comprises a bottom plate, a terminal body fixedly connected to the center of the top of the bottom plate, an electric telescopic rod fixedly connected to the top of the bottom plate, and a fixed cylinder fixedly connected to the outer side of the output end of the electric telescopic rod. A covering plate is fixedly connected to the top end of the fixing cylinder, a heat detector is fixedly connected to the middle of the top of the covering plate, a controller is fixedly connected above the inner side of the covering plate, and a mineral wool layer is fixedly connected to the inner wall of the covering plate. Through design cooperation, the device can detect whether a fire occurs around through the thermal detector, if yes, the controller can control the electric telescopic rod and the power supply automatic change-over switch to be started, and firstly, the electric telescopic rod can retract downwards to drive the covering plate at the top of the bottom plate to completely cover the outer side of the terminal body for fire insulation treatment; the terminal body is prevented from being burnt by fire.

Devices, methods, and systems for testing a heat detector of a self-testing hazard sensing device are described herein. One device includes a heat detector, and a controller configured to provide energy to the heat detector to heat the heat detector to a threshold temperature, determine an amount of time it takes for the heat detector to heat to the threshold temperature, determine whether the amount of time it takes for the heat detector to heat to the threshold temperature meets or exceeds a threshold amount of time, and determine whether the heat detector is functioning properly based on whether the amount of time it takes for the heat detector to heat to the threshold temperature meets or exceeds the threshold amount of time.

To provide a thermal detector having a broadband absorption spectrum while maintaining uniformly high absorption across the entire spectral band of detection.SOLUTION: The invention relates to a thermal detector with a suspended absorbent membrane, which has at least two absorbers (31, 32). The second absorber (32) is designed to absorb the electromagnetic radiation in a spectral sub-band Δλ2 of a predefined spectral band Δλtot, centered on a wavelength λc2. Moreover, it is spaced from a reflector (12) by a value h2 equal to λc2 / 4neq2 so as to form therewith a quarter-wave cavity C2 for the wavelength λc2, the spectral sub-band Δλ2 being centered on the wavelength λc2 which is equal to λc1 / 2±2 μm. Furthermore, the first and second absorbers (31, 32) have total surface areas such that a surface area ratio S2 / S1 is between 0.5 and 3.SELECTED DRAWING: Figure 2A

This invention discloses a testing device for sensitive components of a linear temperature-sensitive fire detector, belonging to the field of fire detector testing technology. It includes a housing, a heating system, a temperature control system, and a heat dissipation system. The heating system employs a surface-mount heat conduction heating cavity and a matching heating device. The temperature control system is based on a PLC industrial control integrated computer. This invention designs standardized testing methods for both constant-temperature and differential-temperature alarm-type sensitive components. During the heating process, online thermal characteristic identification and predictive temperature control algorithms achieve precise regulation of the temperature rise rate. During the constant-temperature process, a Smith predictor combined with an adaptive PI algorithm achieves stable temperature control. Multiple safety protection functions are also included. This invention solves the problems of low temperature control accuracy, non-standardized testing procedures, inability to realistically simulate the temperature rise process, low testing efficiency, and potential safety hazards in existing testing methods. The testing process closely matches the actual working environment of the component, and the results meet standard testing requirements.

A thermal detector comprising an absorbing membrane suspended above a readout substrate, which comprises a thermistor layer resting on two electrodes. The first electrode is a looped track, and the second electrode comprises a central part and a radial track. Furthermore, the thermistor layer has a peripheral contact zone in contact with the first electrode and a central contact zone in contact with the central part; the thermistor layer being electrically insulated from the radial track.

The utility model discloses a convenient heat dissipation acoustic-thermal detector, belonging to the acoustic-thermal detector field, the convenient heat dissipation acoustic-thermal detector comprises a housing and an acoustic array assembly arranged on the side surface of the housing, one end of the housing far away from the acoustic array assembly is provided with a display screen, and the other end of the housing far away from the acoustic array assembly is provided with a heat dissipation device. And the inner wall of the shell is provided with an FPGA (Field Programmable Gate Array) chip matched with the acoustic array component. According to the utility model, the FPGA chip on the array probe panel of the acoustic-thermal detector and the ARM processor chip on the acoustic-thermal detector panel are separated through the air duct, so that the heat dissipation area between the two chips is increased, and the air duct is constructed between the grating holes on the two sides to guide air flow to flow out through the grating holes, so that the heat dissipation effect is enhanced, and meanwhile, the heat dissipation efficiency is improved. Under the action of the dustproof mechanism, the grating holes can be covered by the baffle when the acoustic-thermal detector is not used, dust entering is reduced, the baffle can be started along with the acoustic-thermal detector when the acoustic-thermal detector is normally used, normal use of the grating holes is ensured, and the practicability of the device is improved.

To appropriately protect an area to be protected such as a warehouse facility or an energy storage facility from an abnormality such as a fire occurring in the area by using charged liquid particles.SOLUTION: This protective facility is provided with a thermal sensor 12 for sensing abnormality including a fire generated in a sensing section provided for each sensing section including one or a plurality of storage sections of a shelf, an open type head part 14 capable of spraying charged liquid particles obtained by charging liquid particles of a fire extinguishing liquid to a protective section provided for each protective section including one or a plurality of storage sections of a shelf, a voltage supply part 16 for supplying a prescribed high voltage to the open type head part 14 when the open type head part 14 senses the abnormality, and a control part 22 for controlling a spraying operation for selectively spraying the liquid particles or the charged liquid particles of the fire extinguishing liquid from the open type head part 14 provided in a prescribed protective section based on the sensing section of the prescribed protective section when the thermal sensor 12 senses the abnormality.SELECTED DRAWING: Figure 2

A method for manufacturing a detection device includes steps of: producing thermal detectors distributed in a detection array and a compensation array using mineral sacrificial layers; producing an encapsulation structure comprising a thin opaque layer extending above the compensation array; partially removing the mineral sacrificial layers by chemical etching, so as to release the detection array and the compensation array, and to obtain the peripheral wall then formed of a non-etched portion of the mineral sacrificial layers and surrounding the compensation array, the thin opaque layer then being suspended above the compensation array and resting on the peripheral wall.

The utility model discloses a smoke and temperature sensing fire detector convenient to maintain, which comprises a detector main body and a clamping assembly, the clamping assembly is arranged at the top of the outer wall of the detector main body, the clamping assembly comprises a fixed block fixedly connected with the top of the outer wall of the detector main body, and the top of the outer wall of the fixed block is fixedly connected with a connecting shaft. The outer wall of the connecting shaft is sleeved with a sliding block, the top of the outer wall of the connecting shaft is fixedly connected with an insertion block, clamping blocks are arranged on the front side and the rear side of the outer wall of the connecting shaft respectively, a connecting block is arranged on the side, away from the connecting shaft, of each clamping block, and a first spring is arranged on the side, away from the corresponding clamping block, of each connecting block. According to the utility model, through the arrangement of the clamping assembly, when a worker needs to disassemble the detector main body, the detector main body can be separated from the mounting seat only by manually pushing the detector main body upwards, the whole process is convenient to operate, and inconvenience brought by a traditional fixed connection mode of rotating a bolt is avoided.