4 results about "Radiometry" patented technology

This application discloses a method, apparatus, equipment, medium, and product for blackbody temperature control and calibration, relating to the interdisciplinary technical fields of precision thermal control and radiometry. The method includes: constructing a generalized end-to-end optical-thermal energy transfer model; based on the generalized end-to-end optical-thermal energy transfer model, performing inversion based on the required entrance pupil radiant flux or equivalent image grayscale value, and obtaining the corrected blackbody setpoint temperature through numerical iterative calculation; and using a piecewise active disturbance rejection control system and a temperature-adaptive thermodynamic piecewise control strategy, tracking and controlling the corrected blackbody setpoint temperature. This application can achieve accurate inversion of blackbody temperature and rapid, accurate, overshoot-free closed-loop control of blackbody temperature.

The invention relates to a radiometry measuring device (100) comprising: - a laser source (110) adapted to produce a laser beam (120), - a projection unit (130) adapted to illuminate simultaneously at least two regions (11) of a sample (1) with the laser beam, the projection unit comprising a shaping optical unit (132) adapted to, before the laser beam illuminates the sample, increase a divergence of the laser beam and modify an intensity profile of the laser beam, - a photothermal detection device (150) comprising at least two photosensitive elements (152), each photosensitive element being associated with one of the at least two regions of the sample and being adapted to detect a heat flow (140) radiated by said region, heated by the laser beam, and to deliver a measuring signal (S2) representative of said heat flow, - a processing unit (160) configured to determine, for each photosensitive element, a property of its associated region of the sample based on the measuring signal delivered by said photosensitive element.

Embodiments relate to use of microwave heating and infrared thermography for assessing perfusion. The system includes a microwave source, an antenna, and a radiometer. The microwave source generates microwave radiation at a frequency that is tuned to or near a resonance frequency by the antenna to output a microwave beam. The microwave beam is caused to be incident upon tissue and is converted to heat. The heated tissue emits infrared radiation that is monitored by the radiometer. The system allows for a low-cost, efficient, and non-invasive means to assess blood perfusion without radiofrequency interference. Use of infrared thermography is accomplished by the formation of the hole in the antenna structure. Use of an array of such antennas allows the measurement of perfusion for multiple points across a region of the body. The efficiency of the system is aided by adjusting the average microwave power by means of pulse width modulation.

Device for detecting foreign bodies (21) in a mat (5) scattered on a conveying device (4) during the production of a material sheet, wherein the mat (5) consists at least partially of fibers or chips and binders which are pressed together under increased temperature, wherein at least one first sensor device (6) operating with electromagnetic or ultrasonic waves or with magnetic fields or with radiometry is provided, which is directed towards one or more spatial measuring areas (22) of the mat in order to detect foreign bodies (10), and at least a second sensor device (7) is provided which is also aligned to the measuring ranges (22), and wherein the first sensor device (6) is suitable for performing material detection of the foreign body (10), and the second sensor device (7) is suitable for determining at least one foreign body dimension, characterized by the fact that which at least one first sensor device (6) and at least one second sensor device (7) use different physical operating methods, and that an evaluation device (15) is provided which is capable of performing a sensor fusion of the at least one first sensor device (6) and the least one second sensor device (7), wherein, depending on the result of the sensor fusion, a foreign body ejection device (11) can be activated in the evaluation device (15).