32results about "Beacon systems using electromagnetic waves" patented technology

The device (100) for tracking an object (200), comprising means for attaching to said object (200), a wireless communication circuit (102), at least two antenna modules (104) having respective positions different from one another, and at least one processor (108) configured to: - select one of the at least two antenna modules (104) based on information indicative of a best-oriented antenna module for wireless communication among the at least two antenna modules; - transmit or receive one or more signals for tracking said object (200) using the wireless communication circuit (102) and the selected best-oriented antenna module (104).

Certain aspects of the present disclosure provide techniques and apparatus for training and using machine learning models to predict a layout of a spatial area based on an input data set of samples from the spatial environment. An example method generally includes receiving an input data set including a plurality of samples from a spatial area. Each sample of the plurality of samples generally includes at least channel state information data. A machine learning model is trained to predict a layout of the spatial area based on the input data set. The predicted layout of the spatial area generally includes a plurality of bounding boxes defining different regions of the spatial area.

To determine the relative position (RL) of a missile (4) with respect to a target axis (18), a transmitter (24) emits a laser guidance field (26) with a pattern (30) varying and rotating around the target axis (18) along the target axis (18). The current intensity (IA1-3) of the laser guidance field (26) is recorded at three different measurement points (MP1-3) at known measurement positions (ML1-3) on the missile (4). From this, a difference (DPA,B) of polar angles (PW) between the two measurement points (MP1-3) of each pair (PA,B) with respect to the target axis (18) is determined for at least two different pairs (PA,B) of the three measurement points (MP1-3). The relative position (RL) is then determined as the offset (AL) of the roll axis (28) from the target axis (18) and the rotation angle (DW) of the missile (4) about the roll axis. (28) determined with respect to a zero angle (NW).To guide a guided missile (4), the above procedure is carried out for the guided missile as missile (4) and the guidance device (16) is controlled towards the target axis (18) depending on the relative position (RL). A missile assembly (22) includes the aforementioned transmitter unit (24), which emits the laser guidance field (26), and the missile (4), which determines the relative position (RL).

To provide an optical receiving unit for a position measuring system for determining spatial position information, the optical receiving unit certainly preventing faulty measurement even under mechanical and / or thermal stress.SOLUTION: The present invention relates to an optical receiving unit for a position measuring system for determining spatial position information. The receiving unit has a measuring cell. The measuring cell includes a base plate, a transparent cover plate with a scanning grating, one or more spacers between the base plate and the cover plate, and an optoelectronic detector whose light-sensitive surface is oriented in the direction of the cover plate. The detector is arranged on the base plate of the measuring cell via a self-centering compensating element.SELECTED DRAWING: Figure 2

A system 10 for tracking movement of an object 12 in a three-dimensional (3D) environment, such as a vehicles driving on a motor racing circuit, comprises at least one emitter 14 provided on the objec

An unmanned aerial vehicle (UAV) 100 carries an optically pumped magnetometer 110 for detecting a signal from a magnetic beacon. The UAV has one or more rotors 106 which produce a noise signal. The ma

The invention relates to a beacon system based on a hollow-core optical fiber, and the system employs the hollow-core optical fiber to transmit laser to a far-end optical processing unit, and the far-end optical processing unit carries out the optical processing of the laser, so as to generate visible light. The technical scheme provided by the invention has the beneficial effects that 1, the weight per unit length of the hollow-core optical fiber is far lower than that of a copper-core cable, and the extremely light dead weight enables the length of the used optical fiber to be far greater than that of the cable when the same weight load is reached, so that the effective laying radius of the beacon system is greatly expanded, and the service life of the beacon system is prolonged; the core bottleneck that the working distance is limited by the dead weight of the cable is solved. 2, the hollow-core optical fiber transmits laser energy, and Joule heat loss caused by the resistance effect of the cable is avoided in the transmission process of the hollow-core optical fiber; and secondly, the far-end optical processing unit is used for performing optical processing on the laser to generate visible light, so that energy loss in the electro-optical conversion process is avoided. By means of the end-to-end light-to-light conversion path, the energy utilization rate is greatly improved.

A headset for use in displaying a virtual image of a building information model (BIM) in relation to a site coordinate system of a construction site and a method for tracking a portable tool at a construction site. Both comprise deriving a transformation between a real-world coordinate system and an intrinsic coordinate system of a positional tracking system. The headset is communicatively coupled to one or more position-tracking sensors mounted thereon, has an augmented reality display system, and an electronic control system. The electronic control system is configured to convert a BIM model defined in an extrinsic, real world coordinate system into an intrinsic coordinate system defined by a position tracking system, receive headset tracking data from a headset tracking system and render a virtual image of the BIM relative to the position and orientation of the headset on the construction site which is viewable by the user as a virtual image of the BIM.

An optical wireless communication device (100) comprising: a two-dimensional array of emitters (110) each emitter arranged to emit an optical signal and having an individual coverage area; wherein the two-dimensional array of emitters (110) is arranged to create a combined coverage area larger than the individual coverage area, with each individual coverage area evenly distributed within the combined coverage area; a receiver (120) configured to receive a feedback from a remote device in the combined coverage area; and a controller (101) configured to assign an address to each emitter out of the two-dimensional array of emitters, each address comprising a pair of codes representing coordinates on an X-axis and a Y-axis, respectively, according to a Cartesian coordinate system, to uniquely identify each emitter in the Cartesian coordinate system; wherein each emitter out of the two-dimensional array of emitters (110) is configured to send a beacon signal comprising its address for assisting the remote device to provide the feedback, with the plurality of emitters configured to send beacon signals according a Code-Division Multiple Access; and the controller (101) is configured to select an emitter out of the two-dimensional array of emitters (110) for establishing an optical wireless data link with the remote device according to the feedback received from the remote device.

A method for detection of an emitter mobile device (B) equipped with a light by a receiver mobile device (A) equipped with a camera, comprising: the emitter mobile device (B) emits a light-modulated signal to advertise its identity or state; the receiver mobile device (A) captures a series of frames with said camera;the modulated signal is detected from said frames; the pixel position of the emitter mobile device on a within the camera frame of the receiver mobile device is detected.

Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and / or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.

A free-space optical transceiver comprises a wide field-of-view lens for receiving an incoming beam, and a sensing system comprising a photodetector for reading data from the incoming beam, a coarse tracking sensor configured to indicate a coarse degree of alignment with the incoming beam, and a fine tracking sensor configured to indicate a fine degree of alignment with the incoming beam. The coarse tracking sensor comprises a central aperture behind which the photodetector and the fine tracking sensor are situated such that the incoming beam is directed to the photodetector and the fine tracking sensor via the central aperture. The optical transceiver further comprises a coarse beam-steering device intermediate the wide field-of-view lens and the sensing system, the coarse beam-steering device being for coarsely aligning the incoming beam with the photodetector and a centre of the coarse tracking sensor based on the indicated coarse degree of alignment.

To provide an inexpensive measuring system with high accuracy at the same time.SOLUTION: A base station 2 is configured for a wobbling motion of a planar beam 4, by the wobbling motion, a posture of a normal 6 of the planar beam 4 is changed in a known way such that orientations of the normal 6 occur repeatedly. The normal 6 of the planar beam 4 can cyclically repeat its posture. A measuring device 1 for the base station 2 of this type and at least one remote station 3 belonging to the base station, is also provided. A method for guiding a mobile object, in particular a vehicle, is provided. Here, the base station 2 and at least one active remote station 3 permanently associated with the mobile object are used. They form a transmitter, a receiver, and the measuring device together.SELECTED DRAWING: Figure 2

An apparatus (100) for tracking an object (200), the apparatus comprising means attached to the object (200), a wireless communication circuit (102), at least two antenna modules (104) having respective positions different from each other, and at least one processor (108), the at least one processor is configured to: select one of the at least two antenna modules (104) based on information indicative of an antenna module of the at least two antenna modules for a best orientation for wireless communication; -transmitting or receiving one or more signals for tracking said object (200) using the wireless communication circuit (102) and the selected optimal orientation antenna module (104).

A process for remote localization of an object including (i) receiving / determining two or more magnetic field measurements using at least one magnetometer of a magnetic field generated by a magnetic field source (MFS) in a marker apparatus remote from the magnetometer and in / on an opaque medium such that the magnetic field extends through the opaque medium and / or through a navigable medium between the MFS and the magnetometer; (ii) receiving / determining two or more respective measurement locations of the magnetic field measurements in 3D by determining locations of the magnetometer when the magnetic field measurements are / were determined; and (iii) numerically estimating a location of the MFS in 3D using the magnetic field measurements, the measurement locations, and a mathematical model representing the system as a magnetic dipole (the MFS) in the navigable and opaque media and the resulting magnetic fields. The measurements can be made while the magnetometer is moving.

This invention relates to the field of autonomous underwater vehicle (AUV) positioning, specifically based on the principle of cone projection. It addresses the problems of complex and time-consuming positioning processes in existing monocular vision-based target positioning methods. The invention utilizes acoustic signals detected by an acoustic guidance device to navigate to the recovery range of a positioning and recovery device. The AUV's bow is aligned with the cage opening of the device, and the central axes of both the AUV and the device are coplanar and parallel to the horizontal plane. Image information from a guide light source is then acquired, and the yaw angle of the AUV is calculated based on the principle of cone projection. This invention is primarily applied to the autonomous recovery of AUVs.

Patient couch for use with a medical device (2), - wherein the patient bed has a chassis (4) by means of which the patient bed can be moved on a surface (3), - wherein the patient bed has a projection (8) on its front side for correct positioning of the patient bed on the medical device (2), which is to be inserted in a predetermined insertion direction (10) into a corresponding receptacle (9) of the medical device (2), - wherein the patient bed has an optical detection device (14) on its front side, which detects light that strikes the detection device (14) from a detection angle area (δ) extending in a horizontal plane around a longitudinal direction (11) of the patient bed from the front, and - wherein the patient couch has a display device (15) on its rear side, by means of which the light detected by the optical detection device (14) or a state (Z) derived therefrom is output to an operator (12) controlling the patient couch, - wherein the detection device (14) is designed as a number of light-conducting fibers (18) extending to the display device (15), and that light coupled into the light-conducting fibers (18) via the display device (15) is output to the operator (12).

The present invention relates to a method and system for locating a first item of equipment in a closed environment. The method emits a first light signal modulated according to at least one pair of frequencies, each pair of frequencies representing a symbol and the at least one represented symbol identifying a location in the closed environment of a second item of equipment close to the first item of equipment. The location of the first item of equipment is that of the second item of equipment when the first and second items of equipment are close to each other.

A system and method for providing guidance to assist an eVTOL airborne vehicle in performing landing and takeoff operations at a landing site in a GPS-unavailable environment is disclosed. An exemplary system includes an airborne vehicle including a camera configured to generate images based on information transmitted from a plurality of light sources disposed adjacent a landing surface of the airborne vehicle, and a controller circuit configured to receive the generated images and determine a position and orientation of the airborne vehicle based on the received images, wherein the light sources are arranged in a predetermined pattern on the landing surface, and a characteristic of the light emitted from each light source is modulated with respect to time.

A method of detecting pulsed radiation comprising the steps of irradiating at least a portion of an array of sensor elements with pulsed radiation (71); addressing the array using a rolling shutter operation (72); reading the array to obtain a radiation image (73); and then applying a pulse detection operation (74) to the radiation image. The rolling shutter operation (72) is configured to address each element line of the array for a predetermined integration period. The predetermined integration period being calculated using an integration period function, itself a function of an anticipated pulse repetition interval of the pulsed radiation. The method and apparatus for the same enable low cost camera arrays to be used for pulse detection and for wider application in the field of low cost communications.

An object of the present invention is to provide a communication system, a control device, a control method, and a program that can inexpensively acquire highly reliable sensor data. A communication system according to the present invention includes a control device, a plurality of lighting devices, and an IoT device. The lighting devices output modulated light beams that are modulated, the IoT device receives each of the modulated light beams, uses information obtained from each of the modulated light beams as metadata, and transmits, to the control device, the metadata and collected sensing data in association with each other, and the control device controls generation and output of the modulated light beams to the lighting devices, estimates a position of the IoT device from the metadata, and stores the position of the IoT device and the sensing data in association with each other.

Method for determining the positioning of a device (10) worn by a vehicle occupant, in particular data glasses (11), in a vehicle interior (12), wherein light emitted by at least one light source (13) arranged in the vehicle interior (12) is modulated by a control device (14) with a predetermined frequency not perceptible to the vehicle occupant, recordings of at least one area of ​​the vehicle interior (12) are made by means of a camera (15) of the wearable device (10) and received by an evaluation unit (16, 16'), and the frequency of the modulated light is determined by the evaluation unit (16,16') is recognized in several of the recordings and assigned to the light source (13) and the positioning of the portable device (10) in the vehicle interior (12) is determined based on a previously known spatial position of the light source (13) in the vehicle interior (12) and a position of the modulated light assigned to the light source (13) in the recordings; such system (20), vehicle (30) and portable device (10).,

The application provides a large-scale sound-light fusion positioning method, which solves the technical problems that the existing target position positioning method is difficult to consider both high-precision measurement of a large-area target position with fewer measuring points and reliable positioning of the large-area target position in a complex environment such as sand and thick fog. The positioning method comprises the following steps: arranging at least one acoustic measuring point and at least one optical measuring point in a safe area; the acoustic measuring point acquires a target direction and a sound wave arrival time, and the optical measuring point acquires a target direction and an event occurrence time; taking the event occurrence time as a reference time, the time of the sound wave propagating from the target position to the acoustic measuring point is obtained, and the distance from the acoustic measuring point to the target is calculated; and the target position is calculated by using a weighted least square method. The application can meet the demand for high-precision measurement and realize large-scale measurement of kilometers, and considers both high-precision measurement with fewer measuring points and reliable positioning in a complex environment.

The application discloses a multi-mode personal positioning and search beacon, which comprises a support and a multi-mode beacon body for positioning and searching for a person, wherein the support is provided with a mounting cavity, and a horizontal rotation adjusting mechanism is arranged in the mounting cavity. The multi-mode beacon body can be adjusted in rotation along the front and rear pitch angles, and can be adjusted in rotation along the horizontal direction angle position. The rotation adjustment of the multi-mode beacon body along the horizontal direction angle position and the adjustment of the front and rear pitch angles can be simultaneously matched, so that the multi-mode beacon body can be adjusted in any direction, the multi-mode beacon body can emit a search signal in a better angle position, the beacon direction needs not to be manually changed, the arm fatigue and the interruption of the positioning signal are avoided, the beacon can fully play a role, the positioning of the position information is more accurate, and the adaptability is stronger.

According to an embodiment, a method performed by an electronic device may comprise an operation of acquiring a set of sensing data for an illuminance level around the electronic device while displaying an image on a display of the electronic device. The method may comprise an operation of identifying first information about a first duty ratio of a pulse signal. The method may comprise an operation of identifying second information about a second duty ratio of the pulse signal, the second information corresponding to brightness setting information. The method may comprise an operation of determining that an external object is adjacent to the electronic device, on the basis of the second information about the second duty ratio being within a reference range with respect to the first information about the first duty ratio.