Abstract:
A method of detecting a defect light sensor, includes the operations of: - collecting data, comprising collecting light sensor data; - performing a preparation procedure on the collected data in order to determine a template; and - performing a detection procedure for determining a light sensor status. The operation of performing a preparation procedure includes determining a template of the behavior of the light sensor data collected during a time period constituting a part of a day with well-defined conditions The operation of performing a detection procedure includes the operations of: - collecting light sensor data for several further days during the corresponding time period; - selecting representative days thereof; - determining a corresponding behavior for each selected day; and - comparing the corresponding behavior with the template to detect any defect of the light sensor.
Abstract:
The invention relates to a system (100) for sensing ambient light intensity, comprising a wearable device (10) with at least one pair of light receivers (20, 22, 23, 24, 25) arranged in two different positions for receiving light from the two different directions, and a control unit (110) configured to determine a directional illuminance based on light intensities of the light received by the pair of light receivers (20, 22, 23, 24, 25).
Abstract:
Die Erfindung betrifft eine Kalibriereinrichtung (1) und ein Kalibrierverfahren zur Kalibration zumindest eines Detektors (6) eines optischen Instruments (2) in extraterrestrischer Umgebung insbesondere zur Fernerkundung der Erde enthaltend eine Vielzahl nebeneinander angeordneter optisch wirksamer, auf einen strahlenden Himmelskörper (4) ausgerichteter und über ein Fourier-Element (12) auf zumindest einen Detektor (6) abbildender Elemente (7). Um eine Kalibration unabhängig von Variationen der relativen Position der Strahlungsquelle (4) und/oder einem Degradationsverhalten der Kalibriereinrichtung (1) und/oder des Instrumentes (2) zu kompensieren, sind numerische Aperturen der optisch wirksamen Elemente (7) derart eingestellt, dass ein Akzeptanzwinkel der optisch wirksamen Elemente (7) ein Vielfaches eines von der Strahlungsquelle (4) eingestrahlten Strahlungswinkels (α) beträgt, sodass eine auf den Detektor (6) abgebildete Signalintensität (I) innerhalb des an die Variation der relativen Position der Strahlungsquelle (4) angepassten Akzeptanz-Winkelbereichs unabhängig vom Einstrahlwinkel (β) der Strahlungsquelle (4) ist.. Ein Kalibrierverfahren berücksichtigt dabei durch partielles Bestrahlen der Kalibriereinrichtung (1) und/oder des Detektors (6) ein Degradationsverhalten der Komponenten.
Abstract:
A lighting device includes a pyroelectric sensor, a shutter and a lighting control unit. The lighting control unit is configured, when the lighting load is turned off, to turn the lighting load on if the pyroelectric sensor detects a change in infrared radiation. The lighting control unit is also configured, when the lighting load is turned on, to turn the lighting load off if a repetition count or time of a lighting retention time reaches a specified count or time, respectively, with no change in infrared radiation detected through the pyroelectric sensor within each lighting retention time per the passage of lighting retention time.
Abstract:
A lighting device includes a pyroelectric sensor, a shutter and a lighting control unit. The lighting control unit is configured, when the lighting load is turned off, to turn the lighting load on if the pyroelectric sensor detects a change in infrared radiation. The lighting control unit is also configured, when the lighting load is turned on, to turn the lighting load off if a repetition count or time of a lighting retention time reaches a specified count or time, respectively, with no change in infrared radiation detected through the pyroelectric sensor within each lighting retention time per the passage of lighting retention time.
Abstract:
Le circuit de détection comporte une photodiode (1) reliée à un module de lecture (2). La photodiode (1) et le module de lecture (2) sont connectés par l'intermédiaire d'un transistor (4) agencé pour fonctionner en commutateur fermé lorsque le module de lecture (2) polarise la photodiode (1) dans une gamme prédéfinie et pour fonctionner en commutateur ouvert dans les autres cas.
Abstract translation:该电路具有读取模块(2),例如 电容跨阻放大器或缓冲直接注入模块,用于在输入端子上施加参考电压(V-REF)。 光电二极管(1) P / N型光电二极管耦合到读取模块的输入端,以便被偏置。 读取模块的光电二极管和输入端子通过非对称晶体管(4)耦合,例如, P型MOS晶体管被布置为当读取模块将光电二极管偏压在预定范围内时作为闭合开关工作,并在其它情况下作为开路开关工作。 还包括用于包括一组检测电路的检测矩阵的独立权利要求。
Abstract:
An intelligent electronic device (IED) may be configured to detect arc flash events within a power system using stimulus measurements acquired by detection devices communicatively coupled to the power system. An arc flash event may be detected using a time-intensity comparison metric, such as an inverse time-over- stimulus metric, a cumulative stimulus metric, or the like. The stimulus may include electro-optical (EO) radiation produced in the vicinity of the power system, current measurements, or the like. The IED may detect an arc flash event if one or more of the stimulus types are indicative of an arc flash event. Responsive to detecting an arc flash event, the IED, or other protective element, may take one or more protective actions, such as issuing trip commands, or the like.
Abstract:
A light sensor and light sensing system to detect an intensity of incident light and an angle of incidence of the incident light. The light sensor includes a dielectric layer, a plurality of photo detectors coupled relative to the dielectric layer, and a plurality of stacks of opaque slats embedded within the dielectric layer. The dielectric layer is substantially transparent to the incident light. The photo detectors detect the incident light through the dielectric layer. The stacks of opaque slats are approximately parallel to an interface between the dielectric layer and the photo detectors. The stacks of opaque slats define light apertures between adjacent stacks of opaque slats. At least some of the stacks of opaque slats are arranged at a non-zero angle relative to other stacks of the opaque slats.