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| Number | Title | Issue Date |
| 7956329 | Flame detector and a method A flame detector is provided which comprises a housing (1), a test source of electromagnetic radiation (4) and a sensor (7). The source of electromagnetic radiation (4) and the sensor (7) are mounted within the housing (1). ... | 06/07/2011 |
| 7718968 | Multi-filter spectral detection system for detecting the presence within a scene of a predefined central wavelength over an extended operative temperature range A detector assembly for imaging a scene over a predetermined temperature range and a predetermined wavelength range including a central wavelength includes an imaging-sensor array, a plurality of focusing elements and a plurality of optical filtering elements. The i... | 05/18/2010 |
| 7714290 | Flame detector A first band pass filter selects and transmits light having an infrared wavelength specific to flame. A first infrared-ray receiving element receives the light from the first band pass filter. A second band pass filter selects and transmits light having an infrared ... | 05/11/2010 |
| 7638770 | Method for detecting a fire condition in a monitored region A method of detecting a fire condition in a monitored region including the operations of: concurrently monitoring the region using: a plurality of fire combustion product emission band sensors, each band sensor sensitive to radiation within a respective waveband whi... | 12/29/2009 |
| 7420195 | Frequency-optimized detection of gun muzzle flashes Methods for remotely detecting a gun muzzle flash, using frequency-optimized detection methods. Small explosive charges are best detected at I/R and visible wavelengths, using optical detectors, whereas large explosive charges may also be detected with antennas. Det... | 09/02/2008 |
| 7361946 | Semiconductor device-based sensors Semiconductor device-based chemical sensors and methods associated with the same are provided. The sensors include regions that can interact with chemical species being detected. The chemical species may, for example, be a component of a fluid (e.g., gas or liquid).... | 04/22/2008 |
| 7335885 | Ultra low power NDIR gas sensor fire detector A fire detector and method for generating an alarm signal in response to a fire uses an NDIR sensor to generate a detector signal based upon one or more absorption bands selected from the 15.1μ absorption band of CO2, the 6.27μ absorption band of H2O and the 4.67Î... | 02/26/2008 |
| 7329895 | Dual wavelength detector A sensor comprises two photodiodes sensitive to different wavelengths. The photodiodes or detectors are stacked in a vertical relationship to each other. A bandpass filter is provided to limit the wavelengths of light reaching the detectors. The photodiodes are form... | 02/12/2008 |
| 7327269 | Flame sensor for a burner A flame sensor circuit is used to sense the presence or absence of a flame in a burner. A first sensor generates a first intensity signal which is proportional to the light intensity of the flame in the burner. A second sensor generates a second signal produced by t... | 02/05/2008 |
| 7327472 | High temperature, minimally invasive optical sensing modules A remote temperature sensing system includes a light source selectively producing light at two different wavelengths and a sensor device having an optical path length that varies as a function of temperature. The sensor receives light emitted by the light source and... | 02/05/2008 |
| 7297970 | Flame detector A flame detector having the following features is capable of simple and reliable determination of the occurrence or nonoccurrence of fire resulting from a flame based on waveforms detected from detection signals from infrared sensors. The flame detector includes an ... | 11/20/2007 |
| 7286704 | Imaging fire detector An imaging fire detector is used to detect a fire from a recorded image sequence. Either a video camera or an infrared camera is used as an imaging device. Characterizing parameters of a fire are either analyzed individually or in combination. In order to detect cha... | 10/23/2007 |
| 7281382 | Method and apparatus for detecting the presence of flame in the exhaust path of a gas turbine engine 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 electr... | 10/16/2007 |
| 7256401 | System and method for fire detection A system and method for detecting radiation indicative of fire, such as forest fire. In one embodiment, a threshold energy level is determined based on ambient sensor conditions. A sensor unit may be setup to scan a predetermined area for electromagnetic radiation. ... | 08/14/2007 |
| 7214939 | Ultra low power NDIR carbon dioxide sensor fire detector A fire detector and method for generating an alarm signal in response to a fire uses an NDIR CO2 sensor to generate a detector signal based upon a 15μ absorption band of CO2 and generates an alarm signal when a signal processor receives the de... | 05/08/2007 |
| 7208733 | Non-visible radiation imaging and inspection A non-visible radiation imaging system is provided in which an image is obtained based on non-visible radiation of an object. The image can be enhanced to increase its resolution. Additionally, the image can be combined with another image based on visible light for ... | 04/24/2007 |
| 7202794 | Flame detection system A flame detection system includes a plurality of sensors for generating a plurality of respective sensor signals. The plurality of sensors includes a set of discrete optical radiation sensors responsive to flame as well as non-flame emissions. An Artificial Neural N... | 04/10/2007 |
| 7187280 | Alarm system with thin profile An alarm system includes a housing that substantially encloses a plurality of sensors and an alarm-signal generator. The housing has a thin profile and may be mountable in various locations, such as on a window surface. The thin profile of the housing allows the ala... | 03/06/2007 |
| 7186947 | Process monitor for laser and plasma materials processing of materials A method for monitoring the processing of a workpiece includes directing an incident laser beam onto the workpiece and measuring a signal emitted from the workpiece. At least two signals are generated by a detector based upon the emitted signal. A workpiece processi... | 03/06/2007 |
| 7186979 | Passive NDIR carbon dioxide sensor fire detector A fire detector with a passive CO2 sensor generates a detector signal based upon a 15μ absorption band of CO2 and a signal processor generates an alarm signal when a preselected criterion is met. The passive CO2 sensor has a passive... | 03/06/2007 |
| 7176460 | Passive NDIR gas sensor fire detector A fire detector and method for detecting fires uses a passive NDIR sensor that generates a detector signal based upon either a 15μ absorption band of CO2 or a 6.27μ absorption band of H2O and a signal processor which receives the detector sig... | 02/13/2007 |
| 7157705 | Handheld infrared camera A handheld infrared camera having a lens assembly, an electric energy source and a handling elements for recording and handling information received via the lens assembly has an essentially elongate housing. The lens assembly is mounted at one end of the housing, th... | 01/02/2007 |
| 7157706 | Cryogenically cooled adjustable apertures for infrared cameras A continuously variable diaphragm or swappable fixed aperture for use in thermal infrared cameras, which aperture or diaphragm can be cooled to cryogenic temperatures. The invention contemplates mounting aperture control means, if necessary, in a vacuum or extending... | 01/02/2007 |
| 7155029 | Method and apparatus of detecting fire by flame imaging An apparatus and method for performing first and second imaging processes contemporaneously, in particular where one of the processes is detecting fires based on images of the flames. The apparatus includes an image sensor for producing a video image, a frame grabbe... | 12/26/2006 |
| 7119697 | Hydrogen fire detection system & method To detect flames burning carbon-free hydrogen-bearing fuels, first, second, and third sensors sense first, second and third regions of an infrared water emission band, and generate first, second, and third signals. A processor generates an alarm when the sensors ind... | 10/10/2006 |
| 7115871 | Field coverage configurable passive infrared radiation intrusion detection device One embodiment of a field coverage configurable passive infrared radiation intrusion detection device comprises a plurality of passive infrared radiation sensors. The device also has an optical element for gathering infrared radiation from different portions of a fi... | 10/03/2006 |
| 7112796 | System and method for optical monitoring of a combustion flame An optical spectrometer for combustion flame temperature determination includes at least two photodetectors positioned for receiving light from a combustion flame, each of the at least two photodetectors having a different, overlapping bandwidth for detecting a resp... | 09/26/2006 |
| 7075079 | Sensor for dual wavelength bands A dual wavelength focal plane has a first array of infrared sensing pixel elements and a second array of visible light pixel elements adapted to be selective to colors encountered while driving an automobile. The second array is selective to the colors red, blue and... | 07/11/2006 |
| 7066273 | Apparatus and methods for sensing of fire and directed fire suppression The present invention provides apparatus and methods for pro-active, intelligent fire suppression and/or control using a micro-controller that is communicatably connected to at least one fire-energy detection sensor and to at least one fire suppression device. The p... | 06/27/2006 |
| 7065470 | Plug-and-socket device comprising an integrated diagnostic/evaluation circuit, display and switchable terminating resistors Plug and socket devices for measuring and diagnostic purposes are known in the art. The substantial disadvantage of said plug and socket devices is that they only furnish mechanical and electrical connections. For diagnostic purposes, an additional socket for connec... | 06/20/2006 |
| 7049602 | Radiation sensor The invention provides a radiation sensor including a housing, an attenuator with at least one cavity for attenuating optical radiation, and a detector, as well as an optical attenuator including an attenuator body, an entrance with one multi-stage input opening or ... | 05/23/2006 |
| RE39081 | Localized automatic fire extinguishing apparatus An automated fire extinguishing apparatus includes a turret with a nozzle connected to a water supply. A plurality of sensors are used to detect a fire monitored by the apparatus. The signals from the sensors are used to aim the nozzle toward the fire and to initiat... | 05/02/2006 |
| 6995403 | Light emitting device A light emitting device is disclosed. The light emitting device comprises a contact layer and an oxide transparent layer located directly on the contact layer. The contact layer has a stacked structure formed by alternately stacking a plurality of nitride semiconduc... | 02/07/2006 |
| 6947802 | Centralized control architecture for a laser materials processing system Apparatus, systems, and methods for monitoring the processing of a workpiece that includes directing an incident laser beam onto the workpiece and using an optical detector for measuring a signal emitted from the workpiece as a result of the incident laser beam. The... | 09/20/2005 |
| 6927394 | Fire detector with electronic frequency analysis A process and system for flame detection includes a microprocessor-controlled detector with a first sensor for sensing temporal energy in a first optical frequency range, and a second sensor for sensing temporal energy in a second optical frequency range. The tempor... | 08/09/2005 |
| 6919565 | Infrared imaging apparatus and infrared monitoring apparatus for vehicle To obtain an image signal in which the distance to a target can be recognized, an infrared imaging apparatus 47 comprises an infrared irradiation unit 48 for radiating infrared radiation in an attenuation wavelength range in which the infrared radiatio... | 07/19/2005 |
| 6914246 | Method and apparatus for spatially resolving flame temperatures using ultraviolet light emission A method for spatially resolving flame temperatures in which a temperature-dependent wavelength region of a molecule radical spectrum and a normalization wavelength region of the molecule radical spectrum suitable for normalizing spectral data are identified. An alg... | 07/05/2005 |
| 6902287 | Environmentally controlled appliance enclosure An environmentally controlled appliance enclosure includes an enclosed spacer and a heater assembly positioned within the spacer. A heater unit and a fan are secured to the heater assembly. A mounting plate is positioned on the assembly mount and an appliance is sec... | 06/07/2005 |
| 6903357 | Solid state spark detection An apparatus, system, and method for solid state spark detection are disclosed. A semiconducting photodetector has a pair of electrical conductors for carrying an electrical current generated when the semiconducting photodetector receives light energy generated by s... | 06/07/2005 |
| 6853358 | Method and device for driving a plasma display panel A method for driving a plasma display panel is provided in which wasteful power consumption is reduced and ion bombardment that may deteriorate cells is suppressed for a long life of cells. A ratio of lighting that is a ratio of the number of cells to be lighted to ... | 02/08/2005 |
