Abstract: A signal processing module for use with a receiver for receiving echoes of an emitted signal. The signal processing module comprises sensing logic for sensing presence of a being or object in a space using echoes of the signal as reflected from the being or object, wherein the echoes are received with an associated frequency band. The signal processing module further comprises control logic for detecting disturbance having potential to compromise said sensing, wherein the signal processing module is configured to detect this disturbance by listening for an unwanted signal in a region of the spectrum outside the frequency band of the echoes, and to adapt the sensing in dependence on the detected disturbance.

Abstract: A controller comprising: presence detection logic, calibration logic, and an input for receiving a reading from a light sensor representing a sensed light level. The presence detection logic is for detecting presence events based on a presence sensor, and is configured to indicate a set-point to operate at least one lighting device in dependence on a positive detection of presence. The calibration logic is for performing a calibration operation, which is performed by causing a light output of the lighting device to change between a first, lower level and a second, higher level, and by and calibrating the set-point based on the reading from the light sensor under influence of the first and second levels. The calibration logic is configured to trigger this calibration operation in response to the positive detection of presence.

Abstract: The present invention relates to a method for controlling a lighting device in a daylight harvesting system. When a user tampers with a sensor, in order to decrease the light level light level measured and therefore increase the light intensity of the lighting device, the tampering is detected. Based on this tamper detection the light intensity of the lighting device is controlled based on a set value (e.g. 70% dimming).

Abstract: A network of active sensors in a control system is considered. The active sensors, which may be fixed-infrastructure sensors, provide presence detection information to a distributed lighting system. The active sensors communicate by transmitting probe signals. The communication of probe signals may result in cross-interference which may vary in time. Cross-interference is detected, and can later be avoided, by determining a difference between signals received in a first part of a timeslot and signals received in a second part of the timeslot. In order to do so probe signals comprising two non-zero pulses are transmitted in respective parts of the timeslot. Applications are, for example, active presence sensors in lighting control applications in indoor as well as outdoor environments.

Abstract: An illumination system and method is disclosed. In one example, the illumination system comprises a light source, a controller controlling the power output of the light source, and a light sensor wirelessly communicating with the controller. In a normal mode, the controller controls the light source such that the light level remains substantially constant. In a change mode, the controller controls the light source such that the light level is gradually changed with a predetermined change rate so as to decrease a deviation from a target level. The controller switches from the normal mode to the change mode on the basis of input signals received from the light sensor. The light sensor measures a light level, and decides whether or not to communicate a signal to the controller. The light sensor refrains from transmitting a signal when receiving the signal does not cause the controller to change its control behavior.

Abstract: An illumination system and method is disclosed. In one example, the illumination system comprises a light source, a controller controlling the power output of the light source, and a light sensor wirelessly communicating with the controller. In a normal mode, the controller controls the light source such that the light level remains substantially constant. In a change mode, the controller controls the light source such that the light level is gradually changed with a predetermined change rate so as to decrease a deviation from a target level, The controller switches from the normal mode to the change mode on the basis of input signals received from the light sensor. The light sensor measures a light level, and decides whether or not to communicate a signal to the controller. The light sensor refrains from transmitting a signal when receiving the signal does not cause the controller to change its control behaviour.

Abstract: A network of active sensors in a control system is considered. The active sensors, which may be fixed-infrastructure sensors, provide presence detection information to a distributed lighting system. The active sensors communicate by transmitting probe signals. The communication of probe signals may result in cross-interference which may vary in time. Cross-interference is detected, and can later be avoided, by determining a difference between signals received in a first part of a timeslot and signals received in a second part of the timeslot. In order to do so probe signals comprising two non-zero pulses are transmitted in respective parts of the timeslot. Applications are, for example, active presence sensors in lighting control applications in indoor as well as outdoor environments.

Abstract: The invention relates to a method of controlling a passive infrared (PIR) sensor, said sensor controlling if an electrical device is on or off, wherein said PIR sensor has at least two sensor elements, each having a lens focusing IR onto them, control electronics comprising of at least one processing unit and one memory, wherein the at least two sensors cover adjacent cover areas, wherein information of detected presence from said at least two sensor elements are used to decrease false triggers by using the time period between subsequent presence detections, and identification of each of said at least two PIR sensor elements.

Abstract: A presence detection system (1) for detecting a presence of an object (3), particularly a person or an animal or vehicle, within an area (5) divided in detection zones (9A;9B;9C;9D) covering the area. The system comprises a movement detection device (11A;11B;11C;11D) for detecting a movement of the object. The system further comprises an electronic processing device (13) for storing information relating to a position of the object in a zone-wise way, based on a detected movement of the object. The electronic processing device is configured for determining the presence of the object within the area based on a detected movement of the object and stored information relating to the position of the object. The system is highly sensitive and highly prevents false presence detections. The invention also relates to a method for presence detection, and a lighting system comprising the presence detection system.

Abstract: An illumination system and method is disclosed. In one example, the illumination system comprises a light source, a controller controlling the power output of the light source, and a light sensor wirelessly communicating with the controller. In a normal mode, the controller controls the light source such that the light level remains substantially constant. In a change mode, the controller controls the light source such that the light level is gradually changed with a predetermined change rate so as to decrease a deviation from a target level, The controller switches from the normal mode to the change mode on the basis of input signals received from the light sensor. The light sensor measures a light level, and decides whether or not to communicate a signal to the controller. The light sensor refrains from transmitting a signal when receiving the signal does not cause the controller to change its control behaviour.

Abstract: A wireless light sensor, being part of a lighting system, has a sensor element generating a light measuring signal, a microcontroller coupled to the sensor element, and a radio communication device coupled to the microcontroller. The microcontroller has an active mode and a sleeping mode. The light sensor further has a wake-up circuit which determines a rate of change of the light measuring signal, when the microcontroller is in the sleeping mode. The wake-up circuit brings the microcontroller from the sleeping mode into the active mode, when the rate of change of the light measuring signal exceeds a predetermined threshold.

Abstract: An illumination system (10) comprises: —a light source (11); —a controller (12) controlling the power output of the light source; —a light sensor (16) wirelessly communicating with the controller. In a normal mode, the controller controls the light source such that the light level remains substantially constant. In a change mode, the controller controls the light source such that the light level is gradually changed with a predetermined change rate (R) such as to decrease a deviation from a target level (LT). The controller switches from its normal mode to its change mode on the basis of input signals received from the light sensor. The light sensor measures a light level, and decides whether or not to communicate a signal to the controller. The light sensor refrains from transmitting a signal when receiving the signal will not cause the controller to change its control behavior.

Abstract: A presence detection system (1) for detecting a presence of an object (3), particularly a person or an animal or vehicle, within an area (5) divided in detection zones (9A;9B;9C;9D) covering the area. The system comprises a movement detection device (11A;11B;11C;11D) for detecting a movement of the object. The system further comprises an electronic processing device (13) for storing information relating to a position of the object in a zone-wise way, based on a detected movement of the object. The electronic processing device is configured for determining the presence of the object within the area based on a detected movement of the object and stored information relating to the position of the object. The system is highly sensitive and highly prevents false presence detections. The invention also relates to a method for presence detection, and a lighting system comprising the presence detection system.

Abstract: A transducer (800) is provided where a membrane (830) is formed over a front substrate (615); and a piezoelectric layer (820) is formed over the membrane (830) at an active portion (821) and peripheral portions located adjacent the active portion (821). A patterned conductive layer including first and second electrodes (840, 845) is formed over the piezoelectric layer (820). Further, a back substrate structure is provided having supports (822, 824) located at the peripheral portions adjacent the active portion (821). The height (826) of the supports (822, 824) is greater than a combined height (828) of the patterned piezoelectric layer and the patterned conductive layer. Many transducers may be connected to form an array, where a controller may be provided for controlling the array, such as steering a beam of the array, and processing signals received by the array, for presence or motion detection and/or imaging, for example.

Abstract: An illumination system (10), comprising:—four lamps (12A, 12B, 12C, 12D);—four lamp drivers (13A, 13B, 13C, 13D) capable of driving their corresponding lamps with respective dim factors (?1, ?2, ?3, ?4);—a common controller (15) for controlling the dim factors of the respective lamps. The controller is responsive to an input signal indicating a target color point (T) having target chromaticity coordinates (xT, yT) and target brightness (BT). The controller sets the dim factor (?4) of one lamp to be equal to 1, and calculates an optimum solution for the other three dim factors as a function of the target chromaticity coordinates (xT, yT), for the maximum allowed value of the luminance (YMAX) for which 0???1 applies for each of said dim factors (?1S, ?2S, ?3S).

Abstract: A wireless light sensor, being part of a lighting system, has a sensor element generating a light measuring signal, a microcontroller coupled to the sensor element, and a radio communication device coupled to the microcontroller. The microcontroller has an active mode and a sleeping mode. The light sensor further has a wake-up circuit which determines a rate of change of the light measuring signal, when the microcontroller is in the sleeping mode. The wake-up circuit brings the microcontroller from the sleeping mode into the active mode, when the rate of change of the light measuring signal exceeds a predetermined threshold.

Abstract: A lamp driver circuit (400) comprises a feedback circuit for controlling stable operation of a discharge lamp (La), e.g. an inductively coupled discharge lamp such as a molecular radiation lamp, and for controlling a light output level of the discharge lamp (La). In particular, if the discharge lamp (La) is operated at a dimmed light output level, the light output is sensitive to changes in the lamp voltage (VLa), possibly resulting in flickering. In order to control stable lamp operation and prevent flickering, a high-sp feedback circuit is provided for controlling an operating frequency. In order to provide a relatively large dimming range for controlling the light output level, a low-speed feedback circuit is provided for controlling a DC supply voltage level (VDC).

Abstract: A detection device and method includes a transducer array (20) located at a designated area and configured to perform an ultrasonic sweep of the area in response to a trigger event. The transducer array is capable of determining a presence of a live being (16) in the area in accordance with the ultrasonic sweep. A power supply (21) is coupled to the transducer array to provide power to the transducer array and to enable the ultrasonic sweep in a power failure. A transmitter is configured to transmit a result of the ultrasonic sweep to provide a determination of the presence of a live being and the live being's location in the area to personnel responding to an event.

Abstract: Devices (1) for monitoring light (2) coming from different areas comprise first components (10) for selecting light coming from a particular area, second components (20) for filtering the selected light, third components (30) for sensing the filtered light, and fourth components (40) for in response to an output signal of the third component (30) determining spectra of the sensed light and for calculating color parameters such as color points and/or color rendering indices from the spectra. The first components (10) may comprise light angle selectors and redirectors (11), such as rotational mirrors (110) and rotational apparatuses (112), and light angle restrictors (12), such as high aspect ratio structures with absorbing walls (120) or circular holes (121). The second components (20) may comprise filter arrays (21). The third components (30) may comprise sensor arrays (31).

Abstract: An illumination system (10) comprises: —a light source (11); —a controller (12) controlling the power output of the light source; —a light sensor (16) wirelessly communicating with the controller. In a normal mode, the controller controls the light source such that the light level remains substantially constant. In a change mode, the controller controls the light source such that the light level is gradually changed with a predetermined change rate (R) such as to decrease a deviation from a target level (LT). The controller switches from its normalmode to its change mode on the basis of input signals received from the light sensor. The light sensor measures a light level, and decides whether or notto communicate a signalto the controller. The light sensor refrains from transmitting a signal when receiving the signal will not cause the controller to change its control behaviour.