36 results about "Infrared signature" patented technology

A method for preventing the discovery of military aircraft and missiles by enemy and infrared detectors. The method involves applying a coating of a ferrite containing glass composition to the surfaces of those metal or ceramic substrates that are susceptible to detection through their radar or infrared signature.

Various methods of inspecting a film on a semiconductor workpiece for a residue are provided. In one aspect, a method of inspecting a film on a semiconductor workpiece wherein the film has a known infrared signature is provided. The method includes heating the workpiece so that the film emits infrared radiation and sensing the infrared radiation emitted from the film. The infrared signature of the radiation emitted from the film is compared with the known infrared signature and a signal indicative of a deviation between the infrared signature of the emitted infrared radiation and the known infrared signature is generated. The method enables the rapid and accurate detection of residues, such as oxide residues on nitride films.

A system and method for cooling at least a portion of an engine are provided. The engine is cooled using a fuel, such as a high heat sink fuel, that is subsequently used for combustion in the engine. The fuel can be used to cool one or more of the gases and/or components in the engine, thereby cooling the engine including an exhaust nozzle. For example, the fuel can be circulated through one or more heat exchanging devices that are disposed inside or outside a passage of the engine, and the fuel can absorb thermal energy from the engine or air that flows in the engine passage. In any case, the cooling of the engine can result in a reduction to the infrared signature of the engine.

A method for measurement of a film cooling effect is disclosed. Film cooling is a technique developed to protect gas turbine engine components from the extremely high temperatures created during its operation. A controlled air pressure is ducted into the hollow interior of the component and the mass rate of air flowing through the plurality of film cooling features or openings is measured. A coolant is then injected into the hollow interior of the component and allowed to flow out of a film cooling feature onto the heated outer surface of the component. The resulting infrared signature is a measure of the relative cooling effect generated by the individual film cool feature. The film cooling effect for an individual feature is quantified as the proportion of mass rate of airflow contributed by its relative individual cooling effect. The area, location and shape of the cooling effect are further classified to determine the degree of conformance to its design intent.

An apparatus and method for characterizing gas flow through features fabricated in a hollow part. A pressurized gas is applied to an interior of the part, and this gas pressure flows outward through features fabricated in the part. At the same time, a stabilizing pressurized gas is applied to an exterior part skin; and the stabilizing gas has a controlled temperature differential from the gas applied to the part interior. An infrared signature of escaping gas and the surrounding part skin is analyzed by a classification method. Analysis of this infrared signature classifies the relative flow rate, size and position of the feature fabricated in the part.

A method facilitates assembling a gas turbine engine. The method comprises mounting a core engine to a vehicle, coupling a fuselage radially outward and around the core engine, and coupling an exhaust nozzle to the core engine to channel exhaust gases discharged from the core engine. In addition, the method also comprises coupling an infrared suppression system in flow communication with the engine exhaust nozzle for channeling exhaust gases discharged from said exhaust nozzle to facilitate suppressing an exhaust infrared signature of the core engine during operation, wherein the infrared suppression system includes an access door and a flow channel that is coupled to the access door such that the flow channel is movable with the access door from a closed position to an open position.

A method and system for capturing a written signature is presented. A tip of an infrared transmitting pen transmits an infrared signal to infrared sensors that are aligned along two sides of a rectangular writing surface. As a person's signature is written with the infrared transmitting pen, the sensors capture the written signature.

A method for measuring an infrared signature of a moving target includes: tracking the moving target with a tracking system along a path from a start position to an end position, measuring infrared radiation data of the moving target along the path, repositioning the tracking system to the start position, retracing the path to measure the infrared radiation data of the background, and determining the infrared signature of the moving target by comparing the infrared radiation data of the moving object with the infrared radiation data of the background without the moving object.

The magazine carrier has flexible yet durable material of construction and slides directly into a rifle magazine and is kept on the magazine during loading into a rifle. The carrier includes novel features for the modern operator including forward facing finger grips and a loop at the bottom to provide magazine drawing and storage options as well as impact protection to the magazine. In addition to providing direct protection to the magazine from contaminants such as dirt and mud, the magazine carrier can also be provided in an alternative embodiment with infrared signature reduction panels to provide the operator with an overall reduced infrared signature.

The invention provides a low infrared signature lobe injection mixing device used for a two-dimensional nozzle outlet. The low infrared signature lobe injection mixing device comprises a rectangular transition section, lobe sections, lobe transition sections and separated cold and hot flow channel sections. A traditional two-dimensional nozzle molded surface cannot effectively shield inner high temperature parts (a center cone, a support plate and a mixer) of an exhaust system, while the special lobe molded surface and baffle plates in separated cold and hot flow channels of the device can effectively shield the high temperature parts, and the detectable infrared radiation of the high temperature parts is reduced; the separated cold and hot flow channel sections separate high temperature combustion-gas flow from injected cold air flow, so that the resistance of cold air flow injection is effectively decreased, and the injection quantity of cold air flow is guaranteed to be quite considerable; and besides, cold flow and hot flow are mixed at the outlet of the device, so that the temperature of the jet flow is greatly decreased, and the infrared radiation of the jet flow can be reduced.

The invention discloses an infrared tire pressure monitoring system and method thereof and a vehicle. The infrared tire pressure monitoring system comprises an infrared detector, a controller and an alerting device. The infrared detector is arranged on an underpan of the vehicle to monitor infrared signature information of underpan parts and output the infrared signature information of the underpan parts. The controller is used for receiving the infrared signature information of the underpan parts and determining whether a scanning monitoring mode is started or not based on the infrared signature information of the underpan parts; and under the scanning monitoring mode, the controller controls the infrared detector to detect infrared signature information of each tire, and tire pressure information is obtained according to the infrared signature information of the tires. The alerting device is controlled by the controller to send alerting signals when the tiresare in an underpressure forewarning state or a tire puncture forewarning state according to the tire pressure information. The infrared tire pressure monitoring system is not required to be installed on every tire, one infrared detector is needed for scanning and monitoring, and therefore real time monitoring, easy maintenance and the economic characteristic are achieved.

An apparatus and method for utilizing any arbitrary mixture ratio of multiple fuel gases having differing combustion characteristics, such as natural gas and hydrogen gas, within an internal combustion engine. The gaseous fuel composition ratio is first sensed, such as by thermal conductivity, infrared signature, sound propagation speed, or equivalent mixture differentiation mechanisms and combinations thereof which are utilized as input(s) to a “multiple map” engine control module which modulates selected operating parameters of the engine, such as fuel injection and ignition timing, in response to the proportions of fuel gases available so that the engine operates correctly and at high efficiency irrespective of the gas mixture ratio being utilized. As a result, an engine configured according to the teachings of the present invention may be fueled from at least two different fuel sources without admixing constraints.

The invention discloses a tent lamp with a low infrared signature. The tent lamp with the low infrared signature comprises a plurality of lamp beads, a power supply, a pair of lamp holder bases respectively attached with a heat dissipation layer and a lamp support with a chamber and an outer mounting surface. The plurality of lamp beads are uniformly distributed and spaced on the entire mounting surface. The lamp support and the lamp beads are completely covered in a housing. The housing comprises an inner light transmitting case, an outer light transmitting case and a sealed heat insulation cavity between the two layers of light transmitting cases. The lamp support and the housing are cradled between the lamp holder bases, in contact with the lamp holder bases and closes both ends of the lamp support and the housing respectively. The power supply is closely fitted to the inner wall of the chamber of the lamp support. According to the tent lamp with the low infrared signature, a multistage buffering heat absorption structure is arranged, so that the heat dissipated by a light source is exchanged with the outside through a plurality of mediums, the heat dissipation rate is larger than the heat transfer rate, and accordingly the whole lamp is maintained at a lower temperature.

A method for assembling a gas turbine engine includes mounting a core engine to a vehicle, coupling a fuselage radially outward and around the core engine, coupling an exhaust nozzle to the core engine to channel exhaust gases discharged from the core engine, wherein the exhaust nozzle includes a cowl and a primary nozzle coupled radially inward from the cowl, and coupling an infrared suppression system in flow communication with the engine exhaust nozzle to facilitate suppressing an exhaust infrared signature of the core engine, wherein the infrared suppression system includes a blocking fin having a substantially U-shaped cross-sectional profile and such that a cooling air flowpath is defined between the cowl and the blocking fin.

A heat seeking missile decoy device mounted on a military vehicle to change the infrared signature of the military vehicle. The device is at ambient temperature when stored on the military vehicle. When a heat seeking missile is fired at the military vehicle, the decoy device deploys and increases in temperature, changing the infrared signature of the vehicle and causing a hot spot away from vulnerable components of the vehicle. The hot spot radiates in the infrared in an area that is away from vulnerable parts of a military vehicle, drawing the heat seeking missile toward it. The termination trajectory of the heat seeking missile is at the end of the decoy device and not the vulnerable parts of the military vehicle. The energy required to heat the device is passive waste energy from the vehicle engine exhaust.

An exhaust gas distribution device for the engine of a vehicle, wherein said device incorporates means to control the evacuation of the gases towards a classical exhaust system or else towards a specific exhaust system, said specific exhaust system incorporating means to dilute and reduce the visible, sound and infrared signatures of said vehicle.

Provided herein are VIS-IR powders comprising tin which show significantly higher visual intensity, reduced reaction temperature and particle temperature during and after oxidation reaction in air, and improved resistance to clumping when compared to comparable powders without tin. Methods of preparation of said VIS-IR powders are also disclosed.