264results about "Direction/deviation determining electromagnetic systems" patented technology

The present invention is directed to systems and methods for monitoring activities in an aviation environment. The system includes at least two monitoring units, each including at least two types of sensors, wherein: the sensors are mounted at a plurality of locations in the aviation environment. The system further includes a processing system being configured to receive said information from the sensors, to process said information to monitor and make predictions, and to combine sensor information by applying data fusion. The system is further configured to compare sensor information with predetermined safety operation criteria, and to generate an alert signal. The method of the invention includes obtaining sensor information, receiving said information from the sensors at a processing system, processing said information, comparing the processed information with predetermined safety operation criteria, and generating an alert signal.

The invention discloses an analog Doppler frequency shift and arrival angle measuring device and method based on Rydberg atoms, and in the aspect of DFS measurement, the device performs beat frequency on two signals to obtain an intermediate frequency signal frequency which is a DFS value; the device calculates the AOA of the echo signal by measuring the phase difference of the echo signal at two different positions in the cesium gas pool. According to the invention, simultaneous measurement of DFS and AOA can be realized, and the scheme has the advantages of simple structure, stable system, multifunction, anti-interference and the like, and has great application prospects in electronic reconnaissance and countermeasure systems and the like.

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 system and method are provided for determining a location of a laser using a diffraction grating. The system includes a lens that projects diffraction patterns from the diffraction grating as an image of diffraction peaks onto a plane. Optical sensors then sense the diffraction peaks. A processor connected to the optical sensors applies a laser position determination method to determine the laser location. In the method, the processor obtains the diffraction peak measurements from the optical sensors and applies a transform to arrange the diffraction peaks into a grid of regularly spaced peaks. The processor then applies convolution kernels to analyze the grid of regularized peaks to to determine a position of a zeroth order diffraction central peak that is used to calculate the angle of incidence of the axis of the laser beam to determine the laser position.

The present disclosure provides new and innovative systems and methods for calculating the draft of a vessel. In an example, a computer-implemented method includes obtaining image data of a vessel, detecting at least one object in the image data, the at least one object comprising at least one draft mark, identifying a waterline by analysing the image data, determining an intersection between the at least one draft mark and the waterline, and calculating a height of the vessel based on the at least one draft mark and the intersection.

An optical detector system providing output signals. The system includes a ring-type photodetector, having an open center and multiple ring detector segments each separated by a gap, and an integral lens for receiving incident light and generating a beam spot on the photodetector. The lens includes an axicon and an asphere with a surface defined by both odd and even polynomial terms. The light does not fall outside or inside of the ring detector segments when the incident light is moved laterally off an optical center line but an intensity of the light is shifted around the ring detector segments. The detector system also may include a computer system configured to determine, based on the output signals, first data indicative of a direction of the beam spot relative to a predetermined point on the photodetector and second data indicative of a distance between the beam spot and the predetermined point.

The present invention discloses a vibration suppression system and method for a star simulation system using laser interference detection. The system includes a laser light source, a first beam splitter, a collimator set, a second beam splitter, a mirror, a detection convergent mirror assembly, a CCD detector, a computer control system, a jitter compensating mirror and a flat splitter; the optical path of the whole system includes a reference optical path and a detection compensating signal optical path. The reference optical path and the detection compensating signal optical path converge at the same time on the CCD detector to constitute a vibration detection interference optical path, and the computer control system performs feedback compensation according to the interferogram intensity change formed by the vibration detection interference optical path. Both the CCD detector and the jitter compensating mirror are connected to the computer control system. The present invention improves the accuracy of spacecraft attitude tracking correction by adding a laser light source and a second beam splitter so that both star simulation imaging and optical path jitter compensation correction can be performed.

The invention discloses a device and method for simultaneously measuring the two-dimensional angle of arrival and Doppler frequency shift of microwave photons, and belongs to the technical field of optical communication and microwaves, and the device is characterized in that an output port of a laser is connected with an optical input port of a PDM-DPMZM, and an optical output port of the PDM-DPMZM is connected with a common input end of an optical beam splitter; a first output port of the optical beam splitter is connected with a common input port of a first polarization beam splitter PBS1, and two output ports of the PBS1 are respectively connected with two optical input ports of a first balance photoelectric detector BPD1; an output port II of the light beam splitter is connected with a common input port of a polarization beam splitter II PBS2; and two output ports of the PBS2 are respectively connected with two light input ports of a balance photoelectric detector I BPD2. The device is simple in structure, and can solve the problem of low positioning precision in an existing simultaneous arrival angle and DFS measurement scheme.

Solar modules including a solar panel, a sensor for acquiring a power generation state of the solar panel, and a power generation control unit for controlling power generation of the solar panel based on the power generation state are connected to each other. A scan control device for controlling a scan process for scanning an output voltage of each solar panel executed by each power generation control unit to search for a maximum power point includes a determination unit for determining whether or not a power generation state of each solar panel satisfies a predetermined condition, and an instruction unit for instructing a power generation control unit of a solar panel to be controlled based on a result of a scan process in a specific solar module when there is a solar module to be controlled whose power generation state of the solar panel does not satisfy the predetermined condition.

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 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 provides a three-dimensional direction-of-arrival measurement system and method for a sound field, and the method comprises the steps: enabling a laser generation device to emit laser, and enabling a light splitting assembly to divide the laser into first parallel laser and second parallel laser; enabling the first parallel laser and the second parallel laser of the sound field to be measured to generate an interference effect, and obtaining an interfered light beam; the first detector collects deflection information of the first parallel laser penetrating through the sound field to be detected, and the second detector is used for collecting light intensity information of the interfered light beam; and obtaining the three-dimensional direction of arrival of the sound field to be measured based on the deflection information and the light intensity information. Based on the acousto-optic effect, the three-dimensional direction of arrival of the sound field can be accurately determined by combining the phase information of the two beams of parallel laser and the deflection information of the laser generated by the sound field to be measured, and the measurement of the three-dimensional direction of arrival of the sound field is realized.

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.

A detector (110) for determining the position of at least one object (112) is proposed. The detector (110) comprises - at least one sensor element (114) having a matrix (116) of optical sensors (118), each optical sensor (118) having a photosensitive area, wherein each optical sensor (118) is designed to generate at least one sensor signal in response to illumination of its corresponding photosensitive area by a light beam propagating from the object (112) to the detector (110), - at least one evaluation device (128), wherein the evaluation device (128) is configured to select at least one region of interest of the matrix (116), wherein the evaluation device (128) is configured to respectively determine at least one sensor signal of at least two optical sensors (118) of the region of interest, and wherein the evaluation device (128) is configured to determine at least one ordinate z of the object by evaluating a combined signal Q based on the sensor signals DPR , - wherein the evaluation device (128) is configured to determine at least one image of the region of interest based on the sensor signals, and wherein the evaluation device (128) is configured to determine at least one ordinate z of the object (112) from the image by optimizing at least one blurring function f a from the image DFD , - wherein the evaluation device (128) is configured to take into account the ordinate z DPR and the ordinate z DFD to determine at least one combined distance information z

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.

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.

A method for visualising impacts of laser pulses emitted by a laser designator, according to a predetermined repetition interval (PRI), onto a target present in a scene, by means of a device including: an optronic sensor of the silicone-based CMOS type having a predetermined number of rows associated with a rolling shutter-type readout circuit. Each row of the sensor is exposed for an exposure time and read during a reading time so that the exposure time is no less than the reading time but no more than the product of the reading time and the number of rows. A transition between the rows exposed to a signal and the rows not exposed to said signal is detected in at least two images in order to infer the PRI.

A system and a method are disclosed for determining a range of potential distances between a work machine and an object. The system receives an image captured by a camera on the work machine and identifies an object in the image. The system determines an angle between the camera and the object, a height associated with the object, and an uncertainty associated with the height. Based on the angle, the height, and the uncertainty, the system determines a range of potential distances between the work machine and the object. The shortest distance in the range is compared to a threshold distance for safe operation of the work machine. When the shortest distance in the range is less than the threshold distance, the system causes the work machine to perform a safety action.

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 invention relates to a beam position detection assembly (100) for detecting the spatial position of a laser beam (L), comprising: - a beam position detector (10) having a, in particular a single, position detection surface (11); - an optical element (20), which is designed to separate an (input) laser beam (L) into at least two partial beams (L1, L2) by means of reflection and / or transmission in such a way that the propagation properties of the at least two partial beams (L1, L2) differ in their particular focusing and preferably in the particular propagation direction, wherein the beam position detection assembly (100) is designed such that the at least two partial beams (L1, L2) impinge on the position detection surface (11) of the beam position detector (10) and the beam position detector (10) is designed to detect positions and / or position deviations of the at least two partial beams (L1, L2) on the position detection surface (11).

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 Semi-Active Laser sensor for determining a line-of-site to a target includes: a receiver for receiving a plurality of target pulses; a processor for starting a target track for pulses that cross a noise threshold opening a pulse gate within the target track; and for every laser pulse received within the pulse gate crossing the noise threshold, determining a time index relative to the pulse gate center; and a memory for storing the pulses that cross the noise threshold and their respective time index, wherein the processor further temporally offsets the stored pulses based on their corresponding time indexes, sums the offset pulses together to generate a summed pulse signal, and determines the line-of-sight error to the target from the summed pulse signal.