771results about "Sensing radiation from gases/flames" patented technology

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

A system includes a radiation sensor configured to direct a field of view toward at least one conduit along a fluid flow path into a heat exchanger. The radiation sensor is configured to output a signal indicative of a temperature of the at least one conduit. The system also includes a controller communicatively coupled to the radiation sensor. The controller is configured to determine the temperature based on the signal, to compare the temperature to a threshold range, and to adjust a fluid flow through the fluid flow path or the at least one conduit if the temperature deviates from the threshold range.

A blackbody radiation device (110) includes a planar filament emission element (102) and a planar detector (104) for respectively producing and detecting radiation having width dl / 1 less than about 0.1 to test a sample gas, where 1 is the wavelength of the radiation; a reflector (108); a window (W); an electrical control (118); and a data output element (116).

A system includes a radiation sensor configured to direct a field of view toward a conduit within a heat recovery steam generator, and to output a signal indicative of a temperature of the conduit. The system also includes a controller communicatively coupled to the radiation sensor. The controller is configured to determine the temperature based on the signal, and to compare the temperature to a threshold value.

Various embodiments disclosed herein describe an infrared (IR) imaging system for detecting a gas. The imaging system can include an optical filter that selectively passes light having a wavelength in a range of 1585 nm to 1595 nm while attenuating light at wavelengths above 1600 nm and below 1580 nm. The system can include an optical detector array sensitive to light having a wavelength of 1590 that is positioned rear of the optical filter.

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

The multi-spectral imaging system for real-time measurement of combustion efficiency of an industrial flare is provided. The system includes four spectral bands, one for a hydrocarbon group (fuel), one for carbon dioxide (CO2), product of complete combustion), one for carbon monoxide (CO, product of partially completed combustion), and one for background reference. More spectral bands can be added to measure combustion efficiency of specific compounds or enhance the background reference adjustment. The analysis apparatus includes a machine readable storage medium, which provides instructions that cause the analysis apparatus to perform operations to obtain the combustion efficiency of the flare. The operations includes acquiring at least three spatially and temporally synchronized intensities from an imaging unit capturing images of the flare, and producing the combustion efficiency of the flare from said at least three intensities, and absorption coefficients of materials contained in the flare.

A fuel injector for a gas turbine combustor is disclosed which includes a feed arm having a flange for mounting the injector within the combustor and a fuel nozzle depending from the feed arm for injecting fuel into the combustor for combustion. An optical sensor array is operatively associated with the fuel nozzle for observing combustor flame characteristics. The optical sensor array includes a plurality of sapphire rods positioned to be close enough to the combustor flame to oxidize soot deposits thereon.

A camera (1) arranged to generate an IR image (21) and a visible light image (23) is proposed, said camera comprising a thermal imaging part (3) for registering IR radiation from a first field of view, a visible light imaging part (9) for registering visible light from a second field of view at least partially overlapping with the first field of view, and a processing device (15) for processing the information related to the registered IR radiation and the registered visible light information. The processing device (15) is arranged to identify any moving objects that are detectable by the thermal imaging part (3) and not by the visible light imaging part (9), and presenting said moving objects, if any, in such a way that they will be easily recognizable by an operator.

The calibration / verification system and method for gas imaging infrared cameras standardizes the procedures to objectively and consistently check performance of gas imaging infrared cameras. This system includes a background board maintaining a uniform temperature, a target cell filled with a target compound and disposed in front of the background board, a reference cell filled with a reference compound and disposed in front of the background board, and an analyzer coupled to the camera that captures images of the gas cell and the reference cell. The analyzer compares the intensity difference and the temperature difference of rays passing through the target cell and reference cell to a reference relationship data of a quality control chart to determine whether the camera is in a working condition. The method is further extended to provide a quantitative measurement of a hydrocarbon plume from a gas imaging infrared camera.

A semiconductor device for flame detection, including: a semiconductor body having a first conductivity type conductivity, delimited by a front surface and forming a cathode region; an anode region having a second conductivity type conductivity, which extends within the semiconductor body, starting from the front surface, and forms, together with the cathode region, the junction of a photodiode that detect ultraviolet radiation emitted by the flames; a supporting dielectric region; and a sensitive region, which is arranged on the supporting dielectric region and varies its own resistance as a function of the infrared radiation emitted by the flames.

An infrared gas detector includes an infrared reception member, a package configured to accommodate the infrared reception member, and an optical filter. The infrared reception member includes a plurality of thermal infrared detection elements each configured to detect infrared based on heat caused by received infrared. The thermal infrared detection elements are placed side by side. The package is provided with a window opening configured to allow the infrared reception member to receive infrared. The optical filter is attached to the package so as to cover the window opening, and includes a plurality of filter elements respectively corresponding to the plurality of the thermal infrared detection elements. Each of the filter elements includes a filter substrate made of an infrared transparent material, a transmission filter configured to transmit infrared of a selected wavelength, and a cut-off filter configured to absorb infrared of a wavelength longer than the selected wavelength. The transmission filter and the cut-off filter are formed over the filter substrate. The filter substrate is thermally coupled to the package. The transmission filters of the respective filter elements are configured to transmit infrared of the different selected wavelengths.

Apparatus and methods for rapidly detecting, localizing, imaging, and quantifying leaks of natural gas and other hydrocarbon and greenhouse gases. Scanning sensors, scan patterns, and data processing algorithms enable monitoring a site to rapidly detect, localize, image, and quantify amounts and rates of hydrocarbon leaks. Multispectral short-wave infrared detectors sense non-thermal infrared radiation from natural solar or artificial illumination sources by differential absorption spectroscopy. A multispectral sensor is scanned to envelop an area of interest, detect the presence and location of a leak, and raster scan the area around the leak to create an image of the leak. The resulting absorption image related to differential spectral optical depth is color mapped to render the degree of gas absorption across the scene. Analysis of this optical depth image, with factors including known inline pressures and / or surface wind speed measurements, enable estimation of the leak rate, i.e., emission mass flux of gas.

An embedded flight sensor system having a laser and one or more flight sensors in optical communication with the laser plus a data processing device in optical communication with the flight sensors. The flight sensors may be laser based optical components such as a fiber Bragg grating in combination with an optical detector, a spectroscopy grating and detector or an optical detector associated with catch optics. The parameters sensed by the flight sensors may be used to determine any flight parameter. Representative flight parameters include but are not limited to an airframe or external surface temperature, airstream velocity, combustion zone temperature, engine inlet temperature, a gas concentration or a shock front position.

The invention discloses a forest fire fire point detection method based on an MODIS. Firstly, time sequence data is established for multiple days of MOD02 and MOD03 data from the MODIS, time sequence daily value data of multiple days of NDVI and brightness temperature is obtained, break points in the time sequence daily value data of the NDVI and brightness temperature are recognized through a time sequence break point recognition algorithm, and the recognized break points serve as potential fire points; relative fire points are distinguished from the potential fire points through a space context analysis method; real fire points are extracted from autonomous modular sensor data, the relative fire points are compared with the real fire points, and the correctness and leakage rate of the relative fire points are verified. The potential fire points are distinguished through the method that the time sequence data break points are detected through the BFAST algorithm without determining the potential fire points through fixed threshold values, therefore the algorithm has higher adaptability and flexibility for fire point distinguishing, the defects that the regional difference cannot be met by distinguishing the potential fire points through the fixed threshold values is overcome, and the fire point correctly discriminating rate is increased.

Apparatus and methods for rapidly detecting, localizing, imaging, and quantifying leaks of natural gas and other hydrocarbon and greenhouse gases. Scanning sensors, scan patterns, and data processing algorithms enable monitoring a site to rapidly detect, localize, image, and quantify amounts and rates of hydrocarbon leaks. Multispectral short-wave infrared detectors sense non-thermal infrared radiation from natural solar or artificial illumination sources by differential absorption spectroscopy. A multispectral sensor is scanned to envelop an area of interest, detect the presence and location of a leak, and raster scan the area around the leak to create an image of the leak. The resulting absorption image related to differential spectral optical depth is color mapped to render the degree of gas absorption across the scene. Analysis of this optical depth image, with factors including known inline pressures and / or surface wind speed measurements, enable estimation of the leak rate, i.e., emission mass flux of gas.

Silicon Carbide (SiC) probe designs for extreme temperature and pressure sensing uses a single crystal SiC optical chip encased in a sintered SiC material probe. The SiC chip may be protected for high temperature only use or exposed for both temperature and pressure sensing. Hybrid signal processing techniques allow fault-tolerant extreme temperature sensing. Wavelength peak-to-peak (or null-to-null) collective spectrum spread measurement to detect wavelength peak / null shift measurement forms a coarse-fine temperature measurement using broadband spectrum monitoring. The SiC probe frontend acts as a stable emissivity Black-body radiator and monitoring the shift in radiation spectrum enables a pyrometer. This application combines all-SiC pyrometry with thick SiC etalon laser interferometry within a free-spectral range to form a coarse-fine temperature measurement sensor. RF notch filtering techniques improve the sensitivity of the temperature measurement where fine spectral shift or spectrum measurements are needed to deduce temperature.

An infrared sensor having at least one measuring structure, which has, for example, a sensor chip having a measuring structure and a cap chip which is attached to the sensor chip and, together with the sensor chip, defines a sensor space; a screen having an internal screen area and an external screen area surrounding the internal screen area being formed on the top side of the cap chip; the internal screen area which is transparent to the infrared radiation to be detected being formed above the measuring structure, and the external screen area being at least partly non-transparent for the incident infrared radiation. The external screen area may be designed in particular as a reflective coating of metal or a dielectric layer, as reflective structuring formed by trenches having oblique surfaces, or as absorbing structuring.

A method and apparatus for monitoring the exhaust path of a gas turbine engine for the presence of unwanted flames downstream from the main combustion chamber(s). The system is comprised of an Electro-Optics Module containing sensors and associated processing electronics as well as collection and transmitting optics, which relay the radiant energy generated by a flame event to the sensors. The information generated by the sensors is directly related to the time based intensity of the flame event, which can suggest problems associated with the condition of combustion related engine components. This information can then be used by the engine owner / operator to assess the condition of the engine and determine the more efficient required maintenance schedule.

A blackbody radiation device (110) includes a planar filament emission element (102) and a planar detector (104) for respectively producing and detecting radiation having width dl / l less than about 0.1 to test a sample gas, where l is the wavelength of the radiation; a reflector (108); a window (W); an electrical control (118); and a data output element (116).

A multilayered circuit board having a metal-free region vertically extending through at least a portion of a conductive layer, which lies generally parallel to a horizontal plane, vertically spaced from an outer surface. Heat-emitting and heat-sensitive components are mounted on the outer surface. The heat-emitting component is vertically and laterally spaced from the metal-free region, whereas the heat-sensitive component is vertically spaced and laterally aligned within the metal-free region such that the metal-free region is a thermal barrier that shields heat-sensitive component from radial heat flowing from the heat-emitting component.

A system is disclosed that includes a combustor having an end cover and at least one fuel nozzle assembly extending from an inner face of the end cover. A cartridge may extend through the end cover and into the fuel nozzle assembly. The cartridge may define an opening for receiving light emitted from within the combustor. Additionally, a fiber optic cable may be disposed within the cartridge and may be configured to capture at least a portion of the light received through the opening.

A gas leakage monitoring method and system capable of ensuring safety of a gas utilization facility by visualizing invisible-to-naked-eye leakage gas and / or flame of leakage gas into the form of an image. The gas leakage monitoring method comprises the steps of collecting a detected light of a particular wavelength, which is caused by leakage gas and / or a flame of the leakage gas, in a space to be monitored, converting the detected light into an electronic image, amplifying and then converting the electronic image into an optical image again, and imaging the spatial intensity distribution of the particular wavelength light. The gas leakage monitoring system comprises first means for collecting a detected light of a particular wavelength, which is caused by leakage gas and / or a flame of the leakage gas, in a space to be monitored, second means for converting the detected light into an electronic image, and amplifying and then converting the electronic image into an optical image again, and third means for imaging the spatial intensity distribution of the particular wavelength light.

A method for high temperature process control in which the surface emission intensity of a surface is measured at two near-infrared wavelengths over an array of points covering a fill field of view. The emissivity variable is removed from the temperature calculation and the surface emission intensity measurements are digitally processed, resulting in generation of a color temperature map. The color temperature map is processed in a thermal imaging control algorithm process, producing control output signals, which are then input to a temperature control means for controlling the surface temperature. The apparatus used in carrying out this method is surface temperature monitoring system which includes a multiple-wavelength, near-infrared thermal imaging system.

A gas leakage monitoring method and system capable of ensuring safety of a gas utilization facility by visualizing invisible-to-naked-eye leakage gas and / or flame of leakage gas into the form of an image. The gas leakage monitoring method comprises the steps of collecting a detected light of a particular wavelength, which is caused by leakage gas and / or a flame of the leakage gas, in a space to be monitored, converting the detected light into an electronic image, amplifying and then converting the electronic image into an optical image again, and imaging the spatial intensity distribution of the particular wavelength light. The gas leakage monitoring system comprises first means for collecting a detected light of a particular wavelength, which is caused by leakage gas and / or a flame of the leakage gas, in a space to be monitored, second means for converting the detected light into an electronic image, and amplifying and then converting the electronic image into an optical image again, and third means for imaging the spatial intensity distribution of the particular wavelength light.

A sensor used to measure temperature or concentration of a combustible gas. The sensor includes an optical head that picks up infrared information emitted by the combustible gas. The infrared information is conveyed from the optical sensor through a diffracting device onto a strip of photodetectors. A processor receives the information garnered by the photodetectors and determines the concentration and temperature profile of the combustible gas based on a stored thermodynamic model, radiation behavior, varying the thermodynamic parameters, and comparing a calculated spectrum with the measured spectrum. The sensor additionally has elements, such as cooling devices and casing to make it suitable for use with aviation where altitude creates problems with known methods of gas temperature analysis.

The invention includes a system, method and machine readable program for dynamically controlling the casting of a material. Generally, the systems and methods described herein include an active control feedback system or aspects thereof including a temperature sensing device that is well-suited for the harsh environment of the interior of a caster such as a caster for casting metal. Temperature measurement can be accomplished either directly or indirectly. The system is configured to compare the measured temperature with an ideal casting temperature. The temperature sensing device is operably coupled to a cooling device that modulates a flow of coolant to dynamically cool the material being cast. In accordance with one embodiment of the invention, the cooling device includes a plurality of nozzles for delivering one or more cooling fluids to the material being cast.

A gas measuring apparatus includes: an infrared detecting section that receives an infrared ray from a measurement area and outputs infrared spectrum data relating to the infrared ray; a variation detecting section that detects, by using the infrared spectrum data, a variation in intensity of the infrared ray, which is caused in the infrared ray that radiates from the measurement area and which is caused by a measuring object gas in the measurement area; a converting section that converts the infrared spectrum data to radiance temperature spectrum data which represent wavelengths in an infrared region and radiance temperatures at each wavelength; a background temperature detecting section that detects, as background temperature of the measuring object gas, a maximum radiance temperature from among radiance temperatures represented by the radiance temperature spectrum data; a gas temperature detecting section that detects the temperature of the measuring object gas by using a radiance temperature in a wavelength band included in the water vapor absorption band in the infrared region from among the radiance temperatures represented by the radiance temperature spectrum data; and a computing section that computes surface density of the measuring object gas on the basis of the variation in intensity of the infrared ray, the background temperature of the measuring object gas, and the temperature of the measuring object gas.