760 results about "Flame detector" patented technology

The present invention provides a flame sensor having dynamic sensitivity adjustment, wherein the sensitivity of the flame detector can be adjusted by varying the gain of a signal conditioning circuit associated with the flame detector. The flame detector includes a photodiode, such as, for example, a silicon carbide (SiC) photodiode, that, when exposed to electromagnetic radiation having a wavelength in the range of from about 190-400 nanometers, and preferably within the ultraviolet range. The photodiode generates a photocurrent proportional to the ultraviolet light intensity to which it is exposed. The output of the photodiode is processed and amplified by signal conditioning circuitry to produce a signal indicative of the presence of a flame. Moreover, a cutoff wavelength for silicon carbide photodiodes is preferably in the range of about 400 nanometers, which renders the photodiode "blind" to potentially interfering blackbody radiation from the walls of the turbine.

The invention discloses an automatic positioning flame detection system for a three-dimensional space. The automatic positioning flame detection system comprises a front-end monitoring unit connected with a fire scene, a control center connected with the front-end monitoring unit as well as a firefighting linking unit connected with the control center. According to the automatic positioning flame detection system, image acquisition is carried out on the scene at different orientations by adopting more than two sensors in high-resolution infrared CCD (Charge Coupled Device) image type flame detectors; and intelligent fire identification processors are used for analyzing a video image by using a fire flame image identification algorithm and an image three-dimensional algorithm, capturing fire flame information of the scene, analyzing flame position, fire alarm information, the positions of the flame detectors and the flame orientation, transmitting the analysis result to a fire monitoring and managing platform and outputting a signal to an automatic fire alarming control host to the firefighting linking unit. The automatic positioning flame detection system has the characteristics of high positioning precision, long monitoring distance, great protection area and quick speed response and can better meet the requirement of great-space occasions on fire monitoring.

The invention relates to a burst point three-dimensional coordinate measurement device and a burst point three-dimensional coordinate measurement method used in a target range to measure proximity fuse operating distance. The conventional photoelectric detection methods are mainly four-light-curtain junction and charge coupled device (CCD) combination-based measurement methods, and the conventional systems have great measurement errors. The photoelectric measurement device for measuring the projectile spatial burst point three-dimensional coordinates consists of a multi-light-curtain backdrop target, a system power supply, a projectile signal acquisition and processing device and a flame detector; the outputs of the multi-light-curtain backdrop target and the flame detector are connected to the signal acquisition and processing device; the multi-light-curtain backdrop target consists of a first backdrop target and a second backdrop target which are the same, the first backdrop target and the second backdrop target form three detection light curtains respectively, and the intersecting lines of the three detection light curtains and a random horizontal plane are 'N'-shaped in the space; and the first backdrop target, the second backdrop target and the flame detector are sequentially placed along the trajectory direction. The measurement principle is simple; the instruments are simple and convenient to place; and the measurement precision is high.

The invention relates to a suspended intelligent mobile fire extinguishing system, and in particular relates to a suspended intelligent mobile fire extinguishing system for a highway tunnel. The system comprises a suspended track, an image monitoring device, a fire-fighting linkage device, a front-end sensing device, an intelligent fire-fighting car, a wireless transmission network, a garage concentrated control zone and a remote concentrated control zone; the image monitoring device is composed of a spherical infrared video network camera and is used for collecting image information in the monitored area of the tunnel; the fire-fighting linkage device is composed of an audible and visual alarm, a voice broadcaster, a fire-fighting linkage controller and other linkage equipment, and is used for achieving fire alarm and remote voice broadcasting in the tunnel; and the front-end sensing device is composed of a fire detector, a smoke sensor, a protocol conversion module and a temperature detector. The intelligent mobile fire extinguishing system for tunnels is capable of rapidly reacting, timely arriving at the scene, carrying out effective rescue on personnel near a fire accident, controlling early fire development, and putting out the fire as soon as possible.

The invention relates to an intelligent image smog and flame detector, a compound type intelligent image smog and flame detector and an intelligent image smog and flame detecting system. The detectorcomprises a camera or an imaging CCD component, a DSP core processing circuit, an input and output circuit, an infrared lamp and filter component, a shell packaged by metal or other materials, a window lens, and front and back covers, and is characterized by reliably monitoring fires happening in the early stage such as smog and flare, thereby realizing functions of alarming early and reducing theoccurrence of disaster.

A full-automatic control system used for an oil-field heating furnace belongs to the oil industry automatic control technical field and adopts a PLC and a flow transmitter, an outlet pressure transmitter, a temperature transmitter, a flame detector, an air-gate actuator, an igniter, a gas-leaking detecting switch, a regulating valve, a main solenoid valve and a gas flow transmitter which are arranged in an internal part of the heating furnace to form an outlet temperature automatic control system, an air-gas proportioning control system, an automatic igniting system, a flame-out protection system, a flame-zone furnace-tube surface-temperature measuring system and a heating furnace efficiency automatic analyzing-calculating system, to successfully realize the steel tube surface temperature detection in the flame zone and to carry out the furnace tube surface temperature pre-alarming, alarming and furnace-stop control after the data processing by the PLC and also to realize a positive balance calculation control to the furnace efficiency through the measurement to the fuel flow, water flow and the water temperature of the inlet and outlet of the heating furnace, thus realizing the full automatic control to the heating furnace even without the observation of operators.

The invention discloses a CIT ventilation cabinet with temperature-proof smoke-proof and fire-extinguishing functions. A temperature sensor and a smoke sensor are arranged at an air outlet part, are respectively used for detecting the real-time temperature value and the real-time smoke quantity inside a cabinet body and are respectively connected to a controller, the controller is used for controlling the rotating speed of a fan according to detection signals of the temperature sensor and the smoke sensor, a flame detector is arranged inside the cabinet body, is used for detecting flame light signals inside the cabinet body and is connected to the controller, a fire extinguishing device is arranged at the side part of the cabinet body and comprises a plurality of spraying mechanisms and a water supply mechanism, the spraying mechanisms are connected with the water supply mechanism through a pipeline, in addition, a control valve is arranged on the pipeline, and the controller is connected with the control valve and is used for controlling the work state of a warning device and the fire extinguishing device according to the detection results of the flame detector. According to the CIT ventilation cabinet, the temperature and the smoke in the ventilation cabinet can be precisely monitored and effectively controlled.

The instrument comprises carrier gas inlet, working gas inlet, other gas inlet, gas flow meter, mixer, the first and the second four-way valve, the first and the second six-way valve, saturator, heating furnace with programmed control temperature, sample tube with internal-inserted thermocouple, heat conductive pool, cold-trap, chromatographic column, hydrogen flame detector sampling and displaying of computer and spectrogram printing. The instrument with above devices can apply techniques of programmed temperature for reduction de-addendum, surface reaction, oxidation and decomposition as well as H2-O2 titration to carry on surface performance test for catalyst and to obtain spectrogram for each abovesaid performance of the catalyst.

An infrared flame detector of the present invention has an infrared radiation receiving element accommodated in a package. In the infrared radiation receiving element, a set of two pyroelectric elements are arranged side by side and connected in anti-series on a pyroelectric element forming substrate. An infrared optical filter includes a filter forming substrate made of an infrared radiation transmitting material, a set of two narrowband transmission filter sections formed at positions respectively corresponding to positions of the pyroelectric elements on a first surface of the filter forming substrate and configured to transmit infrared radiation of a first selective wavelength and infrared radiation of a second selective wavelength, and a broadband blocking filter section formed on a second surface of the filter forming substrate and configured to absorb infrared radiation of a wavelength longer than an upper limit of an infrared reflection band.

The invention discloses a network intelligent open fire detector control system which mainly comprises an open fire detector and a wireless gateway (base station) and so on. The core module group of the open fire detector comprises a central processor and a wireless module group unit and an ultraviolet flame detection system which are connected with the central processor. According to the system, the wireless module group unit performs data communication with the wireless gateway (base station), the wireless gateway (base station) is connected with a business engine, the business engine performs data interaction with a cloud side data server, and the cloud side data server is connected with multiple types of client sides through the network. With application of the system, the disadvantages that the ultraviolet flame detector has poor sensitivity and small detection distance and have no resistance to lightning interference and has certain rate of false alarm can be solved, and remote command deployment can be realized in case of emergency event so that unnecessary property loss can be reduced, and the powerful guarantee can be provided for the fire fighting force to quickly and effectively handle various fire accidents.

The present invention is a numerically controlled intelligent gas-burning stove and its control method. The gas-burning stove has two symmetrically distributed burners, one electrically controlling box, one gas sensor in the back part of the controlling box, one liquid crystal controlling box in the front part and connected via digital control circuit to the electrically controlling box, one electrically controlling regulation valve communicated via pipe with the burners and one general valve, one pressure switch beside one of the burners, and successively set flame detector, igniter and temperature sensor inside one of the burners. The said gas-burning stove may be programming controlled and has automatic ignition, touching fire regulation, temperature control, safety protection and other functions.

A micro counter-current flame detector is provided that is both sensitive for photometric and ionization detection for gas chromatography (GC). In the detector, a stainless steel capillary (0.01″ i.d.) supplying oxygen functions as a burner, which supports a compact flame that burns in a counter-flowing excess of hydrogen. In the “micro Flame Photometric Detector” (μFPD) response mode, the background emission level is reduced by over an order of magnitude compared to previous experiments using a fused silica capillary burner, resulting in greatly improved detection limits. The device can successfully operate as both a selective and universal GC detector. Results indicate that this micro counter-current flame method yields comparable performance to conventional Flame Photometric and Flame Ionization Detectors.

The invention discloses a fire intelligent monitoring and control system, comprising: monitoring equipment, main control equipment, execution equipment and a host computer, the monitoring equipment communicates with the main control equipment, and the main control equipment communicates with the execution equipment and the upper computer respectively; the monitoring equipment includes: : A combination of one or more of smoke detectors, flame detectors, temperature detectors, camera devices and gas detectors; the main control device includes: main control unit, first voice communication module, fire extinguishing device drive module and a circuit breaker drive module; the execution equipment includes a fire extinguisher and a circuit breaker, the circuit breaker communicates wirelessly with the circuit breaker drive module, and the fire extinguisher communicates wirelessly with the drive module of the fire extinguisher; the upper computer includes a host computer, a display, a keyboard, a mouse and an alarm module. It solves the problem of psychological panic caused by the usual alarm sound of the current fire monitoring system, and at the same time, it can timely and effectively control the fire in the monitoring area to avoid or reduce the losses caused by the fire.

The invention discloses an automatic biomass gas feeding and diffusing control system. The system comprises a first level gage of a work bin, a second level gage of the work bin, a valve control unit, a furnace temperature sensor, a furnace pressure sensor, a furnace front feeding device control unit, a flame detector and an ignition control unit, wherein the first level gage is used for sensing low material level in the work bin and transmitting a low material level signal to the valve control unit; the second level gage is used for sensing high material level in the work bin and transmitting a high material level signal to the valve control unit; the valve control unit is used for controlling the opening and closing of valves of a buffer bin and the work bin according to the received signals; the furnace temperature sensor is used for sensing temperature in a fluidized bed gasification reactor and transmitting a temperature signal to the furnace front feeding device control unit; the furnace pressure sensor is used for sensing pressure in the fluidized bed gasification reactor and transmitting a pressure signal to the furnace front feeding device control unit; the furnace front feeding device control unit is used for controlling the feeding frequency of a furnace front feeding device according to the received signals; the flame detector is used for sensing the flame of a diffusing device and transmitting a signal indicating whether the diffusing device has the flame or not to the ignition control unit; and the ignition control unit is used for controlling the opening of an ignition device according to the received signal.

The invention discloses a method and device for positioning a fire monitor based on image recognition. The method for positioning the fire monitor comprises the following steps that the adjustment angle of a monitor barrel in the horizontal direction is determined, wherein a processing unit analyzes and processes an image and marks the center of the zone of a fire source on the image, and the included angle formed between the monitor barrel and the position of the center of the zone of the flame relative to the center of the image is the adjustment angle of the monitor barrel in the horizontal direction; the adjustment angle of the monitor barrel in the perpendicular direction is determined, wherein the orientation angle of the monitor barrel and the water falling point position of the fire monitor are determined according to the center, marked on the image, of the zone of the fire source, and the elevation angle of the fire monitor is obtained by correcting the monitor barrel with the combination of the installation height and the jet speed of the fire monitor and is the adjustment angle of the fire monitor in the perpendicular direction. According to the method and device for positioning the fire monitor, a wide-angle pick-up lens is used for being combined with a sensor to form a wide-angle flame detector, the detection range of the wide-angle lens is wide, and flame targets within the 360 degrees by using the fire monitor as the center can be detected.

Improved operating modes of a micro counter-current flame ionization detector (μFID) are demonstrated. By operating the flame inside the end of a capillary gas chromatography (GC) column, the effective cell volume enclosing the flame is considerably reduced and results in significantly lower gas flows being required to produce optimal sensitivity from the stable flame. In a post-column μFID arrangement, a very lean flame is now situated on the end of a stainless steel capillary delivering 10 mL/min of hydrogen, which is opposed by a counter-current flow of only 20 mL/min of oxygen. The μFID detection limit obtained in this stable, oxygen-rich counter-current flame mode is 7×10⁻¹¹ gC/s with a response that is linear over 6 orders of magnitude. These findings are comparable to those of a conventional FID. Overall, the results indicate that the low-flow sensitive μFID operating modes presented demonstrate that this detector may be potentially useful for further adaptation to portable devices and related GC applications.

The invention discloses a network type intelligent fire warning and extinguishing controller. The network type intelligent fire warning and extinguishing controller is formed by a point-type ultraviolet flame detector (1), a point-type smoke induction fire detector (2), a point-type temperature induction fire detector (3), a gas fire detector (4), a gas absorbing type fire detector (5), a camera module (17), a sound pick-up module (18), a fire-fighting detection induction box switch module (7), an induction triggering module (11), a video and audio collecting transparent transmission module (12), a WIFI module (19), a 3G module (20), a 4G module (21) or a network, an RS485 control module (14), a solenoid valve switch, a fire extinguishing spray head (23) and a power supply voltage stabilizing module (6). Through the adoption of the scheme, spraying fire extinguishing can be conducted accurately and fast in time, and fire is effectively extinguished in the bud.

The invention relates to a fireproof fire extinguishing device for fire protection. The fireproof fire extinguishing device for fire protection comprises a tank, a fireproof alarm structure, a smoke exhaust structure and a fire extinguishing structure, wherein support pillars are uniformly and fixedly arranged on the top part of the tank and are fixedly connected with a wall through bolts; the fireproof alarm structure comprises a battery box, a smoke fire detector, a flame detector and an audible and visual alarm. According to the fireproof fire extinguishing device for fire protection, densesmoke can be sucked into a smoke exhaust cavity, then a spray head sprays water so as to cool the dense smoke, particle impurities in the dense smoke can be adsorbed by an activated carbon layer, anexhaust fan in a smoke outlet pipe discharges the cooled dense smoke, the fire can be found timely through the smoke fire detector and the flame detector, then the smoke fire detector, the flame detector, the battery box , the audible and visual alarm and the motor form a closed circuit so as to give the alarm to remind people of the outbreak of the fire, a motor can drive a first tapered gear torotate so as to open a valve, a superfine dry powder extinguishing agent is released to extinguish a fire source, and the spread of the fire is reduced.

The invention relates to a detection method for determining a plurality of corrosion removers in food by gas chromatography. The target is that the method has the characteristics of simple operation, matrix interference resistance, reliable result and the like, and the method is suitable for accurately determining the content of the plurality of corrosion removers in the food. The technical scheme is that the gas chromatography detection method of the plurality of corrosion removers in the food is processed according to the following steps: 1) preparing sample extracting solution; preparing liquid sample extracting solution, or preparing solid sample extracting solution; 2) concentrating; rotatably concentrating the sample extracting solution in a water bath at 40+/-2 DEG C until the volume is 0.3-0.5mL; drying by nitrogen, and determining the volume to 2.0-5.0mL by acetone, filtering the sample solution by 0.45 micron of filter membrane to test; and 3) detecting on a machine: inputting the solution to be tested into a gas chromatograph with a hydrogen flame detector to detect.

The invention relates to a flame detection device, in particular to a flame detector probe. The device is characterized in that a quartz glass sheet is arranged between the protection sleeve cover of a photoelectric cell and the protection sleeve of the photoelectric cell; an annular gap is arranged between the quartz glass sheet and the protection sleeve of the photoelectric cell; an axial hole is arranged on the inner edge of one end of the protection sleeve of the photoelectric cell near the protection sleeve cover of the photoelectric cell; the axial hole is communicated with the inside space of the protection sleeve of the photoelectric cell and the annular gap; a rotary outlet with a slot structure is arranged in the protection sleeve cover of the photoelectric cell. The service life of a product is improved by the design of a cooling air course and the quartz glass sheet. The parts in the invention are mostly connected in a threaded way; therefore, the flame detector probe is conveniently dismounted and simply maintained.