摘要:
A system (100) for controlling a plurality of light sources (104a-f) by means of light groups, wherein each light group synchronously controls a subset of the plurality of light sources. The system (100) comprises: a central controller (102); a plurality of light sources (104a-f) wired to the central controller (102); and a light sensor (106a-c) wired to the central controller (102). The central controller (102) is configured to: receive a measurement signal from the light sensor; based on the received measurement signal, determine a subset of light sources that are in optical contact with the light sensor; and include the subset of light sources in a light group associated with the light sensor.
摘要:
A public service system comprises: automatic request recognition means, capable of automatically recognizing a user request, automatic user identification means, capable of automatically identifying the requesting user; automatic authorization means, capable of automatically checking a user's authorisation; a wireless communication network (110) having a plurality of communication nodes (111, 112, 113, 114) capable of direct or indirect communication with each other;a central controller (120; 220) associated with at least one of said communication nodes; and request receiving means associated with at least one of said communication nodes.
摘要:
An event detection system (100) comprises: a communication network of interconnected nodes (10) and a central control station (200), each node being capable of communicating to at least one adjacent node and/or to the central control station, each node comprising: at least one microphone (11); a GPS receiver (12, 13) providing information regarding its location and providing time information; a processing circuit (17), capable of processing the microphone signals, the processing circuit being designed to detect the occurrence of predetermined characteristic sound patterns, and if the occurrence of a predetermined characteristic sound pattern is detected, to communicate the detected event to the central station, together with information regarding location of the node and time of detection; wherein the central station is designed to process the information received from the nodes and to determine the location of the audio source and the occurrence time of the event.
摘要:
A lamp (1), for use in street lighting, is provided with a small network element (10), which preferably is arranged within a lamp fitting (5). The network element is provided with a switching facility, for switching the lamp ON or OFF in response to a corresponding command. The network element is provided with a dimming facility, for dimming the lamp in response to a corresponding command. The network elements (10) are nodes in a low cost and fast communications network which is quickly to install. The network may provide a fine-mazed and relatively low-cost positioning system.
摘要:
In an optical communication method, an accurate common clock signal (GPS) is provided to a sender (10) and a receiver (20). In the sender, the common clock signal is received, a first clock signal (CLK1) is generated on the basis of said common clock signal, a carrier wave with a predetermined carrier frequency (f) is generated using said clock signal as timing reference, the carrier wave is modulated with a data signal, and the modulated carrier wave is transmitted using a light beam (13). In the receiver, the common clock signal is received, a reference signal having the same frequency (f) as the carrier frequency is generated on the basis of said common clock signal, said optical beam (13) is received, a detection signal is derived from the optical beam, the receiver is tuned to the predetermined carrier frequency (f), and the data signal is derived from the detection signal.
摘要:
A communication system (1) comprises a plurality of at least three transmitters (11, 12, 13, 14). A data signal (S) is provided to all transmitters. Each transmitter transmits data signal fragments (31, 32, 33, 34). The data transmissions by the various transmitters are accurately synchronised, such that, on arrival in a target space (2), the various data signal fragments (31, 32, 33, 34) have an accurate timing relationship. Only a receiver (100) located at the target location will receive the various data signal fragments (31, 32, 33, 34) with the correct mutual timings.
摘要:
The invention relates to a mesh node for a communication mesh network structure of a networked control system, particularly a lean and mean infrared mesh node for a communication mesh network infrastructure of a lighting system such a green house lighting system. A basic idea of the invention is to implement a mesh node with a technical simple construction in the form of a base, on which optical transmitters are and optical receivers are arranged. An embodiment of the invention relates to a mesh node (10) for a communication mesh network structure of a networked control system comprising - a base (12), - optical transmitters (14) arranged on the base such that they can transmit data to optical receivers of other mesh nodes, - optical receivers (16) arranged on the base such that they can receive data from optical transmitters of other mesh nodes, - a processor (18) for interpreting data received via the optical receivers from other mesh nodes and routing data to other mesh nodes via the optical transmitters. This construction allows implementing a communication mesh network structure for example for controlling a complex networked lighting system such as it may be applied in a green house, in which thousand of lamps are provided for creating a lighting atmosphere, which may controlled on a local basis.
摘要:
A pointing device (10) is disclosed comprising a light emitter (65) for emitting a plurality of light beams (100) in mutually different controlled directions. The light beams are individually identifiable. The receiving apparatus that is used with this pointing device comprises a light detector for detecting one or more of the plurality of light beams emitted by the pointing device. It determines which of the plurality of individually identifiable light beams are detected. Based thereon the orientation of the pointing device with respect to a target surface may be determined.
摘要:
A roll detection system is disclosed for detecting a roll angle of a light emitting apparatus around a longitudinal axis thereof. The light emitting apparatus preferably is a pointing device (2). The system furthermore comprises a light detecting arrangement (4) for detecting light emitted by the pointing device (2) and means for determining where the pointing device is pointed. The pointing device (2) comprises at least a first (X1) and a second light source (Y1). The first (X1) and second light source (Y1) emit light with a different polarization orientation. The light detecting arrangement (4) is equipped with a polarization filter (3). The orientation of the polarization of the light emitted by the first (X1) and second light source (Y1) differs by an angle unequal to 90°. With the system the roll angle of the pointing device (2) can be determined for a large angle range.
摘要:
A versatile traffic information system (1) comprises: a light source (10), designed for generating a relative narrow, intense light beam (11); housing means (100) adapted for being mounted adjacent or above a road surface (3), accommodating the light source (10), having a beam exit window (101) for allowing the light beam (11) to exit the housing; a controllable beam deflection system (20), capable of changing a direction of the light beam (11) towards a projection area (2) on the road surface (3) in order to form a relatively small light spot (12) on the projection area (2); - a control circuit (30) for controlling the controllable beam deflection system (20) such as to effectively make the light spot (12) draw a predefined pattern (4) on the projection area (2).