2698results about "Fire alarm radiation actuation" patented technology

Detecting video phenomena, such as fire in an aircraft cargo bay, includes receiving a plurality of video images from a plurality of sources, compensating the images to provide enhanced images, extracting features from the enhanced images, and combining the features from the plurality of sources to detect the video phenomena. Extracting features may include determining an energy indicator for each of a subset of the plurality of frames. Detecting video phenomena may also include comparing energy indicators for each of the subset of the plurality of frames to a reference frame. The reference frame corresponds to a video frame taken when no fire is present, video frame immediately preceding each of the subset of the plurality of frames, or a video frame immediately preceding a frame that is immediately preceding each of the subset of the plurality of frames. Image-based and non-image based techniques are described herein in connection with fire detection and/or verification and other applications.

The present invention relates to various improvements relating to automatic vehicle equipment control systems.

A self-protected fire-sensing alarm system includes a flame sensor for detecting the presence of flame within a volume. The system includes a tamper sensor for detecting tampering to the system. The tampering prevents the system from detecting the presence of flame within the volume. The system also includes an alarm indicator for indicating an alarm condition in response to i.) a detection of the presence of flame within the volume and/or ii.) a detection of tampering to the system.

Provided is a light emitting device improved in safety to an eye. The light emitting device includes: a semiconductor laser element for emitting laser light; an optical conversion member for converting coherent laser light which is emitted from the semiconductor laser element into incoherent light, and for emitting the incoherent light; and a safety device for preventing the coherent laser light from exiting to an outside.

A radioactive material detection apparatus includes a transmitter, a radiation sensor and a controller. The transmitter is capable of transmitting information in correspondence with a signal. The radiation sensor has a sensor output and is configured to detect radiation over a predetermined period of time. The controller is configured to receive the sensor output from the radiation sensor and to send the signal to the transmitter for transmission.

Electric utility storm outage management is performed by determining an interconnection model of an electric utility power circuit, the power circuit comprising power circuit components, determining information indicative of weather susceptibility of the power circuit components, determining a weather prediction, and determining a predicted maintenance parameter based on the interconnection model, the weather susceptibility information, and the weather prediction.

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.

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 food safety device for placement on a product is disclosed. The food safety device comprises one or more sensors that measure at least one condition of the product and/or its environment, one or more visual indicators that are configured to display a visual indication of freshness and/or safety of the product. An antenna transmits and receives data regarding the at least one measured condition of the product and the freshness and/or safety of the product. A logic module executes programmable logic to determine the freshness and/or safety of the product from the at least one measured condition of the product, to cause the one or more visual indicators to display a visual indication of the freshness and/or safety it determines, and to transmit and receive data regarding the at least one measured condition of the product and the freshness and/or safety of the product via the antenna.

An improved alarm system that has an added illumination feature allowing locations to be both scanned for intruders, and illuminated upon intrusion detection. This illumination feature imparts a number of advantages over current alarm systems. Notably, lighting the area where an intrusion is detected can aid in identifying the intruder and possibly even intimidating him/her into leaving, especially during night time or other conditions of low ambient light. Also, the illumination feature can be configured so as to be activated independent of the alarm itself. In this manner, light can be provided during emergencies or any other time that users require additional light.

The invention relates to the field of fire-fighting, in particular to an image identification-based fire detecting system and a fire alarm system thereof. The multiband infrared image-type fire detecting system comprises an image acquisition unit, an image processing unit and an alarming unit, wherein the image acquisition unit sends the collected images to the image processing unit; according to the processing algorithm of the image processing unit, the collected infrared images are judged whether to meet the characteristics of the fire; for the images which meet the fire default values, alarming to the alarming unit is conducted; and the image acquisition unit comprises a half transparent and half reflecting beam splitter, an infrared filter and a camera, wherein the monitored area is synchronously monitored by two cameras added with infrared filters with different wavelengths through the half transparent and half reflecting beam splitter. The invention has the advantages of being sacred from the limitation of environmental conditions such as spatial height, heat barrier, easy explosive, poisonousness and the like, being capable of conducting early stage fire detection in large space and outdoor open space, low cost and the like.

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.

The invention relates to a multi-frequency image fire detection system comprising a chromatic/black and white double-changeful camera, a chromatic/near infrared double-changeful camera, an image collection module, a signal processing and control module, an input-output module, an alarm display device, a setting and debugging system, a communication device and an area alarm monitoring system, wherein the chromatic/near infrared camera is manufactured by adopting a CCD or CMOS image sensor with the frequency spectrum response range of 400nm-1200nm and a high-pass infrared optical filter with the wave band of the cut-off frequency of 850nm (or 950nm and more than 950nm); and the chromatic/black and white camera also adopts the CCD or CMOS image sensor with the frequency spectrum response range of 400nm-1200nm. The signal processing and control module comprises a smoke and flame identification and fire data integration arithmetic, a light source control arithmetic, a cradle head control arithmetic, a double-changeful camera switching control arithmetic and a fire positioning arithmetic based on double cameras.

Detecting video phenomena, such as fire in an aircraft cargo bay, includes receiving a plurality of video images from a plurality of sources, compensating the images to provide enhanced images, extracting features from the enhanced images, and combining the features from the plurality of sources to detect the video phenomena. The plurality of sources may include cameras having a sensitivity of between 400 nm and 1000 nm and/or may include cameras having a sensitivity of between 7 and 14 micrometers. Extracting features may include determining an energy indicator for each of a subset of the plurality of frames. Detecting video phenomena may also include comparing energy indicators for each of the subset of the plurality of frames to a reference frame. The reference frame corresponds to a video frame taken when no fire is present, video frame immediately preceding each of the subset of the plurality of frames, or a video frame immediately preceding a frame that is immediately preceding each of the subset of the plurality of frames.

The presence of radiation shielding material concealing illegitimate content in a container is detected by obtaining each of measured gamma-ray data and measured neutron data from the container, and comparing the measured gamma-ray and neutron data to expected gamma-ray and neutron data. An anomaly between the measured data and the expected data is an indicum of the presence of such material shielding such illegitimate content.

The invention provides a method and a system for detecting forest fire. The system is composed of a forest monitoring point which comprises a heavy-duty digital tripod head 1, a thermal infrared imager 2, a visible light camera 3, a micro-meteorological station 4, embedded video processing equipment 5 and a communication bridge 6, and a command and control center which comprises a telemonitoring computer 7 and a communication bridge 8, wherein, the two communication bridges are communicated by a microwave wireless Tcp/IP network. The fire detection work is sequentially performed by the following six major steps: (1) field data acquisition, (2) image data processing, (3) fire recognition and analysis, (4) transmission of recognition results, (5) fire probability assessment and (6) automaticfire early warning. The method and the system combines video compression and decompression technology, thermal infrared image recognition and analysis technology, visible light color image recognition and analysis technology, embedded technology, wireless communication technology, remote sensing (RS) technology and 3D geographic information system technology to automatically recognize forest fireand analyze fire strategies, thus the method and the system are characterized by high detection probability of forest fire, low false alarm rate, no artificial participation, strong timeliness, highreliability, advanced technological means and wide market prospects.