144results about "Direction/deviation determining electromagnetic systems" patented technology

A system includes a first structure that houses first cameras, where each camera is controllably moveable in synchronization with second cameras on a second structure and with third cameras on a third, overhead structure. The first, second, and third sets of cameras are controllably directed toward a specified entity. The second set of cameras are controllably moveable in synchronization with the first and third sets of cameras, and the third, overhead cameras are controllably moveable in synchronization with the first and second sets of cameras. The system also includes a controller configured to generate and send control signals to the first, second, and third sets of cameras to track the specified entity as the specified entity moves within a defined space that is observable by the first, second, and third sets of cameras in the first, second, and third structures. Various other apparatuses and devices are also disclosed.

The invention discloses a photon-assisted measurement system based on sawtooth wave frequency shift, which is characterized in that antenna modules which are arranged at an interval of 1 / 4 microwave signal wavelength receive echo signals of a space, and meanwhile, a laser generates continuous light which enters an electro-optical modulation module; the modulator simultaneously receives an echo signal, a transmitting signal and a low-frequency sawtooth wave frequency shift signal. An optical signal output by the modulator selects a positive first-order sideband through the optical band-pass filter, and two paths of optical signals with mutually orthogonal polarization states are separated through the polarization beam splitter. The optical signals with orthogonal polarization states respectively pass through a low-frequency photoelectric detector and then two paths of low-frequency signals are output, and Doppler frequency shift and arrival angle information of echo signals are obtained by performing digital signal processing on frequencies and phase differences of the two paths of low-frequency signals. The invention can simultaneously measure the angle of arrival and Doppler frequency shift without direction ambiguity, has low structural complexity and is not influenced by microwave signal power.

A system includes an imager and a processor. The imager has a field of view and being configured to operate in a normal state controlled by a first set of operating parameters for capturing a first sequence of images and in a high-speed state controlled by a second set of operating parameters for capturing a second sequence of images. The processor is configured estimate a travel path for an object based on data extracted from the first sequence of the images or the second sequence of the images; and control the imager in the high-speed state to crop the images in the second sequence of the images containing a region of interest including the object. The processor controls the imager so the second sequence of the images contains the region of interest within the field of view and follows the estimated travel path for the object.

The invention relates to an optronic sight having a critical mode, in particular an anti-resonance mode, comprising a variable fundamental frequency, and to a motorised vehicle comprising such a sight. This optronic sight for a motorised vehicle such as an aerial, marine or land vehicle, comprises: - a sighting module (13) capable of being moved about a first axis (X) and a second axis (Y) which is not parallel to the first axis; - means (14, 15) for moving the sighting module about the first axis and the second axis; and - a servo loop for slaving a position parameter of the sighting module to a setpoint, comprising an adaptive servo corrector (16) capable of calculating a command for a controlled device having a critical mode modifying the response of the device. The sight comprises means (23) capable of determining a fundamental frequency of the variable critical mode on the basis of an operating parameter of the controlled device, the corrector (16) being calculated from the fundamental frequency determined to compensate for the anti-resonance or resonance mode.

This enables the detection of the orientation of a moving object, such as a controller, within any given space. [Solution] The information processing system 1 comprises a station 10, a mobile body 30 that can move relative to the station, and one or more processors 34. The station has a first light source 12 and a two-dimensionally driven MEMS mirror 15, and while the MEMS mirror is driven, it reflects a light ray from the first light source with the MEMS mirror and radiates it into a predetermined space around the station, thereby scanning the space two-dimensionally with the light ray. The mobile body has a first optical sensor 31 that detects the reception of the light ray. The processor has a direction determination unit 341 that determines the value of a direction parameter representing the relative direction of the mobile body to the station based on the timing at which the first optical sensor detects the reception of the light ray during scanning of the space at the station.

An optical tracking system may include an optical sensor (e.g., an infrared (IR) camera) coupled to an illuminator (e.g., an infrared light-emitting diode (LED)). The optical tracking system can track an object having retroreflective markers. Light from the illuminator is reflected by the retroreflective markers, which can be detected by the optical sensor. In some cases, the object may include an emitter (e.g., an IR LED) such that active light emitted from the object is directly detected by the optical sensor. The optical sensor generates data based on the detected light and transmits this data to a controller. The controller can calculate position data (e.g., indicating the relative two-dimensional position between the object and the optical sensor). The controller can transmit the position data optically (e.g., using infrared light) to the object.

Disclosed are a method and an astrophotographic apparatus for acquiring images of targets in a sky area. The method includes: step 1, an image acquisition device is driven through a controlled rotatable component to point to the position near a target in a sky area, and images of the sky area are acquired through the image acquisition device; step 2, the images of the sky area are analyzed to obtain the right ascension coordinates and the declination coordinates of the center point of images for synchronizing the coordinates to the controlled rotatable component; step 3, the image acquisition device is driven by the controlled rotatable component to point to a target position of the target right ascension coordinates and the target declination coordinates corresponding to the target celestial body to acquire the images; and step 4, an image processing is performed on the images to obtain the processed images.

The application discloses a lightning VHF interference positioning method based on an irregular array, relates to the lightning positioning field, and comprises the following steps: S1, acquiring the antenna positions of N station interferometers and calculating the time difference τ of a radiation source reaching all baselines ij ; S2, judging whether all the antennas are on the same plane, if yes, entering S3, otherwise, entering S4; S3, calculating the positioning direction of the radiation source by using M groups of baselines and entering S6; S4, combining any three stations to form a selection; S5, calculating the direction of the radiation source under each selection and determining the positioning direction of the radiation source; S6, calculating the elevation angle and the azimuth angle of the radiation source according to the positioning direction of the radiation source; when the interference positioning is performed, the non-coplanar characteristics of the antenna array and the increase of the number of antennas can obviously improve the positioning result of the interferometer, and the method can be applied to any irregular array, that is, the antenna array can be randomly arranged, the coplanar of the antenna array is not required, and the baselines formed by the antenna array are not required to be orthogonal to each other, so that the installation difficulty of the antenna is effectively reduced.

A solar tracking system comprises a plurality of solar panel modules, each independently orientatable relative to a solar source. A control system determines a topography associated with the solar panel modules and generates, for each module, a performance model based at least in part on the topography and weather data. The control system independently orients each solar panel module to the solar source based on the respective performance model to optimize energy output from the array. The topography may indicate relative positions or heights of the modules and can be determined using laser site surveys, energy readings from photovoltaics, or aerial imaging. The weather data may include direct normal irradiance, global horizontal irradiance, or diffuse horizontal irradiance. The control system may periodically update the performance model for each module and account for interactions between neighboring modules due to shading.

An optical system (1) for a multispectral optical sensor (10) comprises: a diffusing element (2); a detector (3) comprising a detection plane (30); an optical element (4) having an entrance side (41) and an exit side (42), located between the diffusion element (2) and the detector (3); and an aperture (5) located at the incident side (41) of the optical element (4) between the diffusing element (2) and the optical element (41). The optical element (4) is configured to image at least one field of view (100) to a detection plane (30). The detection plane (30) is arranged in a focal plane of the optical element (4). The diffusing element (2) is configured to scatter light from the field of view (100), generating a blurred image (90) of the field of view (100) in the detection plane (30).

The present invention relates to an apparatus and method for measuring the beam angle of a light beam guided by a beam guidance optical unit. The apparatus according to the invention comprises a light intensity sensor device (20, 30, 40, 50, 60), a focusing unit (21, 31, 41) for focusing the light beam at a specified position on the light intensity sensor device, and an adjusting unit (22, 32, 42) for adjusting the relative position of the intensity centroid of the light beam with respect to the specified position on the light intensity sensor device in the presence of a change in the beam angle as it enters the apparatus, wherein the adjusting unit (22, 32, 42) is configured to keep the relative position of the intensity centroid of the light beam with respect to the specified position on the light intensity sensor device (20, 30, 40, 50, 60) constant up to a specified maximum deviation, which maximum deviation corresponds to half the average beam diameter at incidence on the light intensity sensor device (20, 30, 40, 50, 60).

A photovoltaic tracking system on roof, includes a photovoltaic panel group having photovoltaic panels connected together by their sides in a linear direction using connecting frames, a tilting system, a gear rack, and a stepper motor. The tilting system includes a rod, a wheel, and a rail. The rod has a first end connected to the wheel and a second end connected to the photovoltaic group. The wheel is disposed on the rail and configured to move linearly along the rail. The tiling system is configured to tilt the photovoltaic panel group by a push or pull force from the rod when the wheel travels on the rail. A triangle is formed by the titling system, the photovoltaic panel group, and a portion of the roof, when the tilting system tilts the photovoltaic panel group. The stepper motor moves the gear rack, so it moves the wheel.

A tilt and orientation sensing device is provided. [Solution] The tilt and orientation sensing device includes a dome structure including a spherical surface, and a ductile circuit board configured to surround at least a portion of the spherical surface, the ductile circuit board including a plurality of optical sensors configured to measure the amount of sunlight, and is characterized in that when the ductile circuit board is positioned on the spherical surface, the plurality of optical sensors face different directions from each other.

The application relates to a MUSIC direction-finding method based on an underwater information system cross array, and belongs to the technical field of underwater acoustic direction finding. In view of the problems of low signal-to-noise ratio and low direction-finding precision of underwater signal direction finding, the application provides a MUSIC direction-finding method based on an underwater information system cross array. The method is based on a MUSIC algorithm, frequency extraction and spatial spectrum accumulation, a cross array is used to perform direction-finding processing on a signal, the relative position relationship between the signal and the cross array is obtained, a suitable linear array in the cross array is selected to perform direction-finding processing on the signal, and the direction finding of an underwater target acoustic signal under low signal-to-noise ratio can be effectively realized.

A method for determining a localization parameter of an object includes generating a plurality of estimates of a first frequency-domain amplitude of a baseband signal from the object, each estimate corresponding one of a plurality of temporal segments of the baseband signal. The method also includes determining the first frequency-domain amplitude as most common value of the plurality of estimates, and determining the localization parameter therefrom. A localization system includes a memory and a microprocessor. The memory stores instructions and is configured to store a baseband signal having a temporal frequency component and a corresponding first frequency-domain amplitude. The microprocessor is adapted to execute the instructions to: (i) generate a plurality of estimates of the first frequency-domain amplitude each corresponding to a respective one of a plurality of temporal segments of the baseband signal, and (ii) determine the first frequency-domain amplitude as the most common value of the estimates.

A LiDAR system includes alight emitter, a light detector, and a controller. The controller is programmed to: activate the light emitter to emit a series of shots into a field of view of the light detector; activate the light detector to detect shots reflected from an object in the field of view; record the detected shots from a first subset of the series of shots; group a second subset of the series of shots not in the first subset; and based on the detected shots from the second subset of the series of shots, identify an object moving in the field of view.

The invention relates to a device and to a method for measuring the beam angle of a light beam guided by a beam guiding optical unit. A device according to the invention comprises a light intensity sensor arrangement (20, 30, 40, 50, 60), a focusing unit (21, 31, 41) for focusing the light beam onto a predetermined location on the light intensity sensor arrangement, and a tracking unit (22, 32, 42), which, in the event of a change in the beam angle present upon entry into the device, tracks a relative position of the intensity center of gravity of the light beam with respect to a predetermined location on the light intensity sensor arrangement. The tracking unit (22, 32, 42) is configured to keep the relative position of the intensity center of gravity of the light beam constant with respect to the predetermined location on the light intensity sensor arrangement (20, 30, 40, 50, 60) to a predetermined maximum deviation, wherein said maximum deviation corresponds to half of the mean beam diameter when impinging on the light intensity sensor arrangement (20, 30, 40, 50, 60).

A device for converting electromagnetic radiation (e.g., nonuniform laser light) into electricity comprises an expander that includes a conical shape having an axis and a curved surface that is configured to reflect electromagnetic radiation away from the axis to expand a beam of the electromagnetic radiation; and one or more energy conversion components configured to receive a beam of electromagnetic radiation expanded by the expander, and to generate electricity from the expanded beam of electromagnetic radiation. With the expander's curved surface, a beam of electromagnetic radiation that is highly concentrated—has a large radiation flux—may be converted into a beam that has a larger cross-sectional area. Moreover, one can configure, if desired, the curved surface to provide a substantially uniform distribution of radiation across the expanded cross-sectional area. With such an expanded beam the one or more energy conversion components can efficiently convert the electromagnetic radiation into electricity.

A solar tracking system comprises multiple solar panel modules forming a grid of solar panel modules, wherein the multiple solar panel modules are orientatable to a solar source independently of each other; and a control system configured to orient each of the multiple solar panel modules to the solar source independently of each other based on a performance model to optimize an energy output from the grid of solar panel modules, wherein the performance model predicts an energy output from the grid of solar panel modules based on a topography of the area containing the grid of solar panel modules and weather conditions local to each of the solar panel modules.

The application discloses a photon-assisted measurement system based on sawtooth wave frequency shift, which receives echo signals of space by antenna modules arranged at intervals of quarter microwave signal wavelength, and a laser generates continuous light into an electro-optical modulation module, and the modulation module simultaneously receives echo signals, transmission signals and low-frequency sawtooth wave frequency shift signals. The modulation module outputs optical signals through an optical band-pass filter to select positive first-order sidebands, and the optical signals are separated into two optical signals with mutually orthogonal polarization states through a polarization beam splitter. The two optical signals with orthogonal polarization states are output as two low-frequency signals after passing through low-frequency photoelectric detectors, and the Doppler shift and the angle of arrival of the echo signals are obtained by performing digital signal processing on the frequency and phase difference of the two low-frequency signals. The application can simultaneously measure the angle of arrival and the Doppler shift without direction ambiguity, has low structural complexity and is not affected by the power of the microwave signal.

The invention discloses a photonic system and method for simultaneously measuring a microwave angle of arrival and Doppler frequency shift, and belongs to the technical field of microwave photon-assisted radars, the photonic system drives one sub-MZM through an echo signal, and simultaneously drives the other sub-MZM through a combination of a phase delay echo signal and a transmission signal. Two on-chip optical band-pass filters are adopted to select an upper sideband and a lower sideband of an output signal of the high-speed silicon-based dual-parallel Mach-Zehnder modulator, and then two intermediate-frequency signals are generated after detection by an on-chip photoelectric detector and amplified by a trans-impedance amplifier. By comparing the power, phase and frequency of the intermediate frequency signals, the microwave arrival angle and Doppler frequency shift (including direction information) can be obtained at the same time. The device is small in measurement error, is highly integrated, has the advantages of compact size and high system stability, and has a good application prospect in a radar system.

Systems and methods for detecting a timing interval in which a light pulse is received by a photodetector array comprising: receiving, by a plurality of photosensitive elements of the photodetector array, electromagnetic radiation from a field of view, accumulating, by each of the plurality of photosensitive elements, an electrical charge proportional to an intensity of received electromagnetic radiation during an integration time period, and performing a search on signals converted from the accumulated electrical charge to detect a light pulse appearance with a predefined precision. Performing the search may include performing a fine search stage including: controlling the duration of the integration time period for each of the plurality of photosensitive elements and a temporal relationship between the integration time periods of the photosensitive elements. The temporal relationship between the integration time periods of the photosensitive elements may define a distinct temporal pattern corresponding to each timing interval within the duration of the integration time period. Detecting a timing interval in which a light pulse is received from the field of view by identifying the distinct temporal pattern corresponding to that timing interval.

An imaging optical system for imaging at least one light source (1) onto at least one light-sensitive sensor (4), wherein the imaging optical system comprises at least one optical aperture (2), at least one beam-forming optical element (3), and at least one light-sensitive sensor (4), wherein the at least one beam-forming optical element (3) is a plano-concave cylindrical mirror, in particular a plano-concave cylindrical mirror.

A system including: an optical steering module configured to receive reflected light, which reflected light includes a portion of a probe light beam reflected from an object, the reflected light including light of a first polarization type, which optical steering module including; a first optical path allowing passage of light of the first polarization type; a second optical path, including an optical steering element, allowing passage of light of a second polarization type; an optical shot generation module optically connected to the optical steering module to receive light from the first optical path and including: a mirror configured to reverse an orientation of light received from the optical steering module, returning the light towards the optical steering module; and a polarization changing element configured to change light of the first polarization type to light of the second polarization type, light returning from the optical shot generation module to the optical steering module passing through the second optical path of the optical steering module; a processor configured to generate control signals for control of the optical steering element, based on a predicted position of the object, to steer light emitted from the second optical path towards the object.

A photodetector for receiving a beam spot. The photodetector has a plurality of independent inner quadrant sections, each having a first anode, and a plurality of independent radial wedge sections each having a second anode. A separate first lead connects the first anode of each of the inner quadrant sections to a corresponding first anode bond pad. A separate second lead connects the second anode of each of the radial wedge sections to a corresponding second anode bond pad. The photodetector also has a single shared and common cathode located on the side of the photodetector opposite the first and second anodes. In some embodiments, the photodetector may include an individual third anode associated with each radial wedge section. Further provided is an optical detector system including the photodetector.

A non-contact temperature measurement device (1) includes: a matching processing unit (24) to estimate a correspondence relationship of pixels between images; a positional relationship estimating unit (25) to estimate a positional relationship between an infrared camera (4A, 4B) and an object (A) on the basis of the correspondence relationship of the pixels; a luminance correcting unit (26) to correct luminance corresponding to a temperature in a luminance image on the basis of the positional relationship; and an emissivity correcting unit (27) to estimate emissivity using the correspondence relationship of the pixels and the luminance image and generate a temperature image on the basis of the emissivity, in which the matching processing unit (24) estimates the correspondence relationship of the pixels between images captured by the infrared camera (4A, 4B) in the same light receiving sensitivity wavelength band, and the emissivity correcting unit (27) estimates emissivity using images captured by the infrared camera (4A, 4B) in different light receiving sensitivity wavelength bands.