Abstract:
Described is a device (1) for detecting at least one thermographic image comprising a thermal camera (2) sensitive to infrared radiation for acquiring the thermographic image; a protective a case (3), inside which the thermal camera (2) is inserted, having a window through which the thermal camera (2) is able to acquire the thermographic image; a screen (5), positioned outside the protective case (3) and movable between a first operating position at which it is superposed on the window to protect it from environmental disturbances and a second operating position wherein it is shifted from the window, allowing the thermal camera (2) to acquire the thermographic image; a pneumatic system (7) for supplying air inside the protective case (3) having an inlet (8) outside the protective case (3); a computerised command and control unit (10); the pneumatic system (7) comprises means (12) for adjusting and distributing the air operating inside the protective case (3) and in communication with the external inlet (8) controlled by the computerised command and control unit (10).
Abstract:
The invention relates to a pyrheliometer (1) comprising a tubular housing (2) having at one end an entrance opening (6) covered by a front window (5), a heating member (7) situated near and thermally coupled to the front window and at a second end (8) of the housing a sensor (9). The sensor is thermally insulated from the front window in such a manner that a temperature difference between the sensor and the front window is at least 1°C for each W of heating power applied to the heating member (7) at ambient conditions in the absence of convective air flow. A sensor window (10) is situated in proximity to the sensor (9), and is thermally coupled to the sensor. The sensor window has a transmission of radiation below a wavelength of 4000 nm of at least 0.8, preferably between a wavelength of 200 and 4000 nm, while substantially blocking radiation above 4000 nm. The sensor is sensitive to radiation above as well as below 4000 nm.
Abstract:
The invention relates to a pyranometer (1) with a housing (2), a sensor (5) in said housing, an inner window (6) and an outer dome-shaped window (7) both overlying the sensor (5). An air inlet duct (21) and an air outlet duct (17) extend in the housing and end in a space confined by the outer window (7) for passing air through said space, from the inlet duct to the outlet duct. The invention is characterized in that the housing is substantially closed such that no outside air flows are allowed into the housing (2) and comprises a ventilator (10), the inlet duct (21) being in fluid communication with a high pressure side of the ventilator (10), the outlet duct (17) being in fluid communication with a low pressure side of the ventilator (10). The air blown into the space below the outer window (7) is heated by the ventilator power and optionally by and added electrical heater.
Abstract:
A sensor arrangement for temperature measurement of a material comprises a roller device (1) with a sheathing (11) configured such that the material can be rolled upon the sheathing. The sheathing comprises a first circumferential portion (13) and a second portion (10), wherein a thickness of the sheathing in the first circumferential portion is greater than a thickness of the sheathing in the second portion. A temperature sensor (5) arranged in a cavity inside the sheathing in proximity of the second portion.
Abstract:
A series of time sequenced heat energy data arrays or data stream sets of a weld process region are processed by a weld data array or data stream processing system to produce a heat energy data set output that is related to weld process region features or weld process region heat energy data. The heat energy data set output can be displayed to a system user and modified by system user input to the weld data array or data stream processing system; alternatively, or in combination, the system user output and input, the heat energy data set output, or data produced from the heat energy data set output by the weld data array or data stream processing system, can be transmitted to a weld process controller to adjust parameters in the weld process responsive to the output of the weld data array or data stream processing system.
Abstract:
A detector assembly (300, 500) includes a dewar chamber (102, 502) having an aperture (108, 510) and an infrared radiation detector (106, 514). The detector assembly also includes a mirror (304, 400, 410, 504) disposed adjacent the aperture of the dewar chamber, where the mirror has a reflective surface (306, 604) and an emitting region (305, 402, 412, 606) facing the aperture. The infrared radiation detector is configured to detect first radiation and second radiation from the mirror. The first radiation originates from at least one relatively cold surface in the dewar chamber and reflects off the reflective surface of the mirror. The second warm radiation originates from at least one relatively warm surface at or behind the emitting region. The infrared radiation detector is also configured to detect an artifact (122, 712, 722, 802) caused by a particle (110) in the dewar chamber that blocks a portion of the first or second radiation.
Abstract:
The invention relates to a device for measuring the temperature of a bath of metal, comprising a sleeve and an optical head, and also to a method for joining together or taking apart a sleeve and an optical head, and also to a sleeve, and finally to a method for measuring the temperature of a bath of molten metal. By virtue of this device, mounting and removal is rendered easier while keeping the measuring zone centred and decreasing measurement disturbances caused by the emission of gas from the sleeve made of refractory material.
Abstract:
A thermal imaging system includes a mounting structure characterized by a first thermal conductivity and a focal plane array mounted to the mounting structure. The thermal imaging system also includes an optical system coupled to the mounting structure and a heating element coupled to the mounting structure. The thermal imaging system further includes a thermal isolator coupled to the mounting structure and characterized by a second thermal conductivity lower than the first thermal conductivity.