Apparatuses, systems, methods, and computer program products for flame detection are provided. An example of a flame detection apparatus includes an infrared sensor to generate infrared sensor data and a thermal camera to capture one or more thermal images and generate thermal image data. The flame detection includes detecting if a flame is present in an environment based on the infrared sensor data and the thermal image data, including determining if one or more false alarms are present. The flame detection may also be based one or more spectral features or thermal features.

A first radiance meter is directed toward an object to be measured, radiance is measured through a space where dust is present with the use of at least two wavelengths by the first radiance meter, second radiance meters which are equal in number to one or more objects having temperatures different from that of the object to be measured are directed toward the objects, radiances are measured through the space with the use of at least two wavelengths by the second radiance meters respectively, and a temperature of the object to be measured, a temperature of the dust, and concentration of the dust are measured from the radiances measured by the first radiance meter and the second radiance meters.

The disclosure provides respective detection devices of a sensor array that detect infrared light and convert the infrared light into a DC component electrical signal.

Devices and methods comprise at least one gauge for inspecting weld seams comprising a plurality of cutouts: a square cutout, a rectangular cutout, a concave cutout with a protuberance; and a straight edge ending with a protruding part. The devices and methods make it possible to inspect the compliance of a weld bead with various quality standards, without taking measurements, or referring to said standards.

A fire detection and suppression system correcting fire detection based on wind. Wind may affect both the apparent position of the fire detected by the fire detectors and also the suppressant jet being delivered by a monitor. Typically wind results in shifting of estimated fire location away from the real fire in the direction of wind. Similarly the suppressant jet will also be diverted in the same direction. The system comprises fire detectors for acquiring two-dimensional fire location information for a fire. A wind sensor acquires wind information, often in region of the fire. A system controller then compensates the three-dimensional fire location information based on the wind information. Additionally, the position of fog/jet monitors is preferably compensated based on the wind information. The jet pressure setting is also ideally determined based on the wind.

A noncontact temperature sensing device receives radiative emissions from a sensed object to measure radiant heat flux and computes a temperature using multiple photodiode sensors, or elements, each sensitive to a different bandwidth of near IR light. The device samples a fluctuating heat source such as a flame or explosion at a fast sampling frequency, and compares corresponding or simultaneous readings in each bandwidth for computing a ratio of the respective bands and determining a temperature via ratio pyrometry. Multiple sensors of adjacent bands each receive corresponding readings of near IR emissions, perform fast, concurrent sampling to mitigate inconsistencies of heat source fluctuations, and compute a temperature based on a ratio between the sampled readings of the different bands. Near IR detection allows common and inexpensive photodiodes to be employed, and the photoelectric rather than thermoelectric sensing allows faster sampling and at a greater distance from the sensed heat source.

A machine that automatically performs select tests on candles includes a pedestal onto which a candle is positioned. The machine also includes cameras, focused on the candle, to collect thermal emission and visual data resulting from a candle burn. The machine is used in a candle burn test method.

A method for monitoring a flame of a burner of a lime kiln, including imaging a video stream showing the burner end of the lime kiln; extracting at least one image from the imaged video stream; determining, using a pretrained algorithm, from the at least one image at least one area of interest, wherein the at least one area of interest includes a part of the at least one image showing an area having at least one characteristic portion of the flame and/or burner end; calculating the area of the at least one characteristic portion based on the pixels of the at least one area of interest; and determining at least one quantity of interest based on the calculated area of the at least one characteristic portion.

A control method includes obtaining a thermal image of a fire area through an aerial vehicle, obtaining a temperature distribution of the fire area based on the thermal image, dividing the fire area into a plurality of sub-areas based on the temperature distribution of the fire area, and projecting the plurality of sub-areas on a map including the fire area displayed by a control terminal. The plurality of sub-areas have different fire levels.

A fire detection system includes at least two fire detectors having a partially overlapping view of a fire. The at least two fire detectors are configured to acquire fire cluster information related to the fire. A validation and pairing module pairs fire clusters detected by the at least two fire detectors for the fire. The validation and pairing module is configured to validate the paired fire clusters according to a validation process that ensures that the pair corresponds to a fire. A triangulation module determines a three-dimensional fire location for the fire based on the fire cluster information related to the validated fire cluster pairs.