84results about "Direction/deviation determining electromagnetic systems" patented technology

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.

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.

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).

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 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 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 system for providing integrated detection and countermeasures against unmanned aerial vehicles include a detecting element, a location determining element and an interdiction element. The detecting element detects an unmanned aerial vehicle in flight in the region of, or approaching, a property, place, event or very important person. The location determining element determines the exact location of the unmanned aerial vehicle. The interdiction element can either direct the unmanned aerial vehicle away from the property, place, event or very important person in a non-destructive manner, or can cause disable the unmanned aerial vehicle in a destructive manner.

A detector (110) for determining a position of at least one object (112) is disclosed. The detector (110) comprises: - at least one sensor element (118) having a matrix (120) of optical sensors (122), the optical sensors (122) each having a light-sensitive area (124), wherein each optical sensor (122) is configured to generate at least one sensor signal in response to an illumination of the light-sensitive area (124) by at least one light beam (116) propagating from the object (112) to the detector (110); - at least one evaluation device (134) configured for evaluating the sensor signals, by a) determining at least one optical sensor (122) having the highest sensor signal and forming at least one center signal; b) evaluating the sensor signals of the optical sensors (122) of the matrix (120) and forming at least one sum signal; c) determining at least one combined signal by combining the center signal and the sum signal; and d) determining at least one longitudinal coordinate z of the object (112) by evaluating the combined signal.

Sensors are installed on a solar photovoltaic (PV) tracker project to monitor the movement of solar PV trackers, primarily under wind loading but also during normal tracking operation. The monitoring establishes a baseline performance of the system. Once this baseline is established, the system is monitored for any deviation from the baseline to provide early warning of developing issues before significant failures are experience under environmental loading. The system can also provide real-time measurement of wind speeds throughout the project, based on the baseline performance characterization.

A method includes receiving a plurality of laser pulses as a pulse train on a plurality of imaging sensor pixels in an array of pixels. For each pixel in the array of pixels, the method includes receiving a respective one of the laser pulse trains, and scanning the pixels response across a range of frequencies with a bandpass filter to determine pulse shape characteristics of the respective one of the laser pulse trains. The method includes filtering out all of the laser pulse trains that do not fit a predetermined pulse shape characteristic for a true target designation pulse train, and physically adjusting trajectory of a physical resource toward a target based on location on the imaging sensor of one or more pixels receiving a laser pulse train that fits the predetermined pulse shape characteristic for the true target designation pulse train.

A tracking camera is disclosed, including a mirror assembly and an event camera, each communicatively coupled to a control unit. The control unit receives event data from the event camera and adjusts the mirror assembly based on the event data. The lens assembly includes at least one lens between the mirror assembly and the event camera.

A computer-implemented method for computing a prediction on images of a scene includes: receiving one or more polarization raw frames of a scene, the polarization raw frames being captured with a polarizing filter at a different linear polarization angle; extracting one or more first tensors in one or more polarization representation spaces from the polarization raw frames; and computing a prediction regarding one or more optically challenging objects in the scene based on the one or more first tensors in the one or more polarization representation spaces.

The invention relates to a positioning system (200) comprising a hybridized inertial unit. The hybridized inertial unit comprises an inertial measurement unit (202), referred to hereinafter as an IMU, a star tracker (203) allowing stars to be observed both during the day and at night, and a computer for calculating a position by hybridizing the measurements from the IMU and from the star tracker. The star tracker (203) comprises an optical objective associated with an active-pixel image sensor, making it possible to image a field of view having a half-field θs of between 2° and 10°; and a high-pass spectral filter with a cutoff wavelength of between 600 nm and 850 nm. The relative position of the star tracker (203) and of the IMU (202) is fixed. The star tracker and the IMU are mounted on an orientable mount (201) suitable for pointing the star tracker (203) in various directions with a pointing precision of between 0.1° and θs.

A detector (110) for determining a position of at least one object (112) is disclosed. The detector (110) comprises: - at least one sensor element (118) having a matrix (120) of optical sensors (122), the optical sensors (122) each having a light-sensitive area (124), wherein each optical sensor (122) is configured to generate at least one sensor signal in response to an illumination of the light-sensitive area (124) by at least one light beam (116) propagating from the object (112) to the detector (110); - at least one evaluation device (134) configured for evaluating the sensor signals, by a) determining at least one optical sensor (122) having the highest sensor signal and forming at least one center signal; b) evaluating the sensor signals of the optical sensors (122) of the matrix (120) and forming at least one sum signal; c) determining at least one combined signal by combining the center signal and the sum signal; and d) determining at least one longitudinal coordinate z of the object (112) by evaluating the combined signal.

The present invention concerns a system for detecting and tracking a light signal from a coherent light source among thermal and / or chaotic sources in a given field of view, comprising: an optical imaging system (11, 21) designed to collect incoming light from the given field of view; a detector assembly (13, 14, 22) designed to receive the incoming light from the optical imaging system (11, 21) and to detect intensity of the light impinging on the detector assembly (13, 14, 22); and a processor (15, 23) configured to compute a light intensity image based on the intensities of the light detected by the detector assembly (13, 14, 22) and an image related to the second order correlation function of the light by determining the second order correlation function of the light based on the intensities of the light detected by the detector assembly (13, 14, 22), and to detect the light signal emitted by the coherent light source based on the light intensity image and the image related to the second order correlation function of the light.

The invention discloses a guidance interception system and method based on mixed acoustic visual fusion and a neural network. The system comprises a mixed sensing unit composed of at least one camera and at least one double-position acoustic sensor array; the self-noise suppression unit is used for receiving an acoustic signal sequence and outputting a noise-reduced acoustic signal; the target state estimation unit fuses the visual and acoustic data to obtain a state vector, only uses the acoustic data to update the state vector after the visual loss, and outputs a prediction angle to drive the holder redirection unit to adjust the holder of the visible light camera to rotate to a target prediction position; and the guidance unit integrates the state, the line-of-sight rate, the self state and the tracking mark through the Actor-Critic network, and outputs bottom layer control to complete tracking interception. According to the method, the problem of direct tracking interception failure caused by dynamic target loss is solved, and the continuous tracking capability of the unmanned aerial vehicle in a complex confrontation environment is ensured.

A method and apparatus for detecting a low altitude unmanned micro-aircraft (UAV) is described. The method includes recording acoustic signals caused by mechanical vibrations of the motor and rotation of the propeller. The method is characterised in that, in addition, the optical signal of the UAV in the range of visible light (0.4... 0.76 [mu] m) and / or infrared light (0.76 [mu] m... 1 mm) is recorded, the occurrence of optical signal parameter modulation caused by these identical mechanical vibrations is detected, and the presence of a correlation of the acoustic and optical signals of the UAV is recorded, the presence of which indicates the detection of the UAV. The device (1) comprises:-a passive acoustic sensor (2),-a passive optical sensor (4), and-a correlator (3), and-an active acoustic sensor (5) adapted to operate at wavelengths at which acoustic waves resonate and scatter on the UAV, with a frequency range of 10... 20 kHz, and-an active radar sensor (6) adapted to operate at wavelengths at which the acoustic waves resonate and scatter on the UAV. The active radar sensor works at the wavelength corresponding to the signal resonance absorption wavelength in the atmosphere, the range is (1mm... 15mm), and the active radar sensor detects the UAV with the flight height of 5m... 50m.

A target located method and apparatus for the detection and wavelength identification of lasers directed at the target using neuromorphic cameras.

A system and method are provided for determining total laser power with photodiode sensors used to measure irradiance from the beam strike of the laser to identify linear offset Gaussian slices. The Gaussian for the slices is then solved to obtain a Gaussian profile, wherein solving to obtain the Gaussian profile includes: measuring an angle of incidence of a central axis of the laser beam relative to a normal axis of a plane containing the photodiode sensors; measuring a positional offset of the plane of the photodiode sensors relative to a plane perpendicular to the central axis of the laser beam; creating a projection of the plane of the photodiode sensors onto the plane perpendicular to a propagation of the beam to provide centered linear slices; and constructing the Gaussian profile from the centered linear slices. The total laser power is then determined from the Gaussian profile.