19 results about "Sun sensor" patented technology

The invention discloses a field-of-view expansion type sun sensor based on diffraction order multiplexing, which comprises a dual-band band-pass optical filter, a diffraction type light introducer and a color CMOS (Complementary Metal Oxide Semiconductor) image sensor, and is characterized in that the dual-band band-pass optical filter is used for selecting two pieces of separated sunlight with a preset wave band for incidence; the diffractive light introducer diffracts transmitted sunlight into multi-level light beams; the color CMOS image sensor is used for acquiring a diffraction spot image containing spectral information of two wave bands; the current effective diffraction order can be determined through the mass center positions of the light spots in the two corresponding wave band channels and the mapping relation between the light spot distance and the diffraction order, and finally the sun vector is obtained through calculation in combination with a diffraction optical model. According to the invention, the inherent contradiction that a large view field and high precision of a traditional digital sun sensor cannot be considered is solved, the problem of level ambiguity in a diffraction extended view field is effectively overcome, the lightweight design of the sun sensor adapts to the high-density integration requirement, and technical support is provided for spacecraft attitude measurement.

The application discloses a satellite solar cell array rotation angle estimation method, which comprises the following steps: step 1, establishing an earth inertial coordinate system, a satellite body coordinate system and a solar cell array coordinate system, and defining a satellite solar cell array rotation angle; step 2, establishing a state equation of an augmented state composed of a sun vector, the solar cell array rotation angle and a gyro constant drift noise; step 3, calculating an augmented state quantity estimation value by using an extended Kalman filter; and step 4, calculating a satellite solar cell array rotation angle estimation value. The method fuses gyro angular velocity and sun sensor vector data, constructs a nonlinear dynamic model containing a sun vector, a rotation angle and a gyro bias, and designs an EKF algorithm to estimate the solar cell array rotation angle in real time, thereby solving the strong dependence of a traditional scheme on a star sensor and a mechanical sensor, and significantly improving the autonomous recovery capability and energy guarantee reliability of a satellite in an extreme fault scene.

The invention relates to the technical field of spaceflight, and discloses an astronomical compass attitude drift correction method, device and equipment and a medium, the method comprises the following steps: determining a first measurement error corresponding to an accelerometer in an astronomical compass and a second measurement error corresponding to a sun sensor; determining an initial weight according to the first measurement error and the second measurement error; obtaining observation data of the astronomical compass in a preset time period; determining the attitude drift distance of the astronomical compass according to the initial weight and the observation data; determining whether the attitude drift amount meets a preset correction condition; if the attitude drift amount does not meet the preset correction condition, adjusting the initial weight to obtain an adjusted weight; and recalculating the attitude drift distance based on the adjusted weight until the recalculated attitude drift distance meets a preset correction condition. The correction precision of the astronomical compass can be improved.

This invention discloses a large field-of-view, high-precision sun sensor based on a polarization-multiplexed metasurface array. It includes a CMOS image sensor and a metasurface array serving as a light introducer. The metasurface array achieves field-of-view multiplexing through multiple superimposed metalens units with different deflection phases. Simultaneously, using polarization multiplexing technology, each metalens unit forms a pair of spaced dual-spots on the CMOS image sensor as a line-of-view encoding. By calculating the spacing between these dual-spots, each sub-field of view can be unambiguously identified and the global field of view synthesized, thus resolving the inherent contradiction between large field of view and high precision in traditional digital sun sensors. This invention combines the advantages of a large field of view and high precision, and its lightweight design adapts to high-density integration requirements, providing technical support for spacecraft attitude measurement.

A buoyancy control system, GPS sensor and data analysis engine, a wind direction sensor, and a controller to detect significant wind direction changes. Upon calculation that the desired location within the eye wall has been reached the buoy descends to depths where ocean currents are reduced, preventing drift from the hurricane eye. A solar sensor triggers ascent when sunlight indicates reentry into the eye.

A self-charging electric vehicle configured for converting solar energy and wind energy into electrical energy comprising a systems and methods. The vehicle includes a body and frame with a central body structure and centerline cabin and a chassis with a centerline battery compartment and a suspension system. Solar cells mounted to the vehicles top sides can be supplemented with extendable solar panel(s) that can be deployed by a control system to generate solar energy into electrical energy. An omnidirectional sun sensor provides for sun strength, angle and direction. A stowable horizontal-axis wind turbine with an extendable mast mounted to the vehicle that can be deployed by a control system to generate wind energy into electrical energy. A stowable anemometer provides for wind speed and wind direction.

The invention provides a universal satellite attitude and orbit control test system self-checking device and an implementation method thereof. Comprising the steps of isolation measuring point resistance value detection, flywheel signal simulation, electromagnetic valve detection, magnetic torquer current signal simulation, sun sensor unipolar constant current source acquisition, magnetometer signal acquisition, watchdog reset and star sensor enable signal acquisition, serial port communication detection and electric star mode communication detection. The satellite-borne software communication detection and electromagnetic valve self-locking valve resistance value detection module realizes simulation of performance indexes required by testing of satellite attitude and orbit control satellite-borne products such as a flywheel, a sun sensor, a fixed star sensor, a propulsion electromagnetic valve self-locking valve, a magnetic torquer and a magnetometer. And the attitude and orbit control self-checking device is connected with the attitude and orbit control ground test system cabinet through a standardized connector and a matched cable.

The invention discloses a wind power generation and solar power generation combined system, which comprises a solar photovoltaic array, a wind power generator, a controller A, a master controller, a display screen and a power grid, and is characterized in that the solar photovoltaic array comprises a solar sensor, an orientation adjusting mechanism A, an angle adjusting mechanism, a plurality of photovoltaic panels and a combiner box A; the multiple photovoltaic panels are all connected with the orientation adjusting mechanism A and the angle adjusting mechanism, the sun sensor, the orientation adjusting mechanism A and the angle adjusting mechanism are all electrically connected with the controller A, and the sun sensor is used for monitoring the orientation angle and the inclination angle of the sun. According to the invention, through a mode of combining wind energy and light energy for power generation, the power generation efficiency is improved, and the angle of the photovoltaic panel and the angle of the wind driven generator module can be adjusted according to the angle of sunlight and the wind direction, so that the photovoltaic panel and the wind driven generator module can be continuously irradiated by the sunlight and blown by wind respectively, and the power generation efficiency is improved.

Method for processing measured values ​​from a sun sensor (1) of a motor vehicle (12) comprising at least one partial sensor, wherein the sun sensor (1) measures the intensity of incident light radiation as measured values, wherein a current geodetic position and orientation of the motor vehicle (12) is determined, and in conjunction with current time information, in particular a current date and time, sun position information (4) describing the position of the sun relative to the motor vehicle (12) is determined, characterized in that the sun sensor (1) has a sensor characteristic (2) which assigns a sensitivity of the sun sensor (1) to each pair of elevation angle and azimuth angle of the sun in relation to the sun sensor (1), in particular for each partial sensor.wherein a current elevation angle and azimuth angle of the sun relative to the sun sensor (1) are determined from the sun position information (4) and the corresponding current sensitivity is determined from the sensor characteristic (2) and used for the correction of the measured values ​​of the sun sensor (1), in particular for sub-sensors, wherein the correction as a correction step (5) comprises a multiplication of the inverse of the sensitivity with a measured value to determine a corrected value, wherein as part of the sun position information (4) a maximum measurable solar power value on Earth is also determined from the time information and / or the current geodetic information and / or the sun position and the corrected value is compared with the solar power value in a diffusivity check.

The utility model provides a kind of adjustable drying rack for drying yellow tobacco, relate to drying rack technical field.This kind of adjustable drying rack for drying yellow tobacco, including support frame, the side fixed mounting of support frame has servo motor, the output of servo motor is fixedly provided with rotation gear, the top of rotation gear is engaged with driven gear, the side fixedly provided with drying frame of driven gear, the both sides of drying frame top surface are fixedly provided with fixed block, the top of fixed block is fixedly installed with solar sensor, the top surface of support frame is fixedly provided with connecting frame.The utility model places tobacco in drying frame and dries, solar sensor senses illumination direction, servo motor is controlled to operate by PLC controller, drives rotation gear to rotate, so that driven gear follows rotation, so that drying frame always faces illumination direction, improve the utilization efficiency of sunlight, shorten drying period.

This invention belongs to the field of Earth science and remote sensing technology, and discloses a method and system for identifying lithium-bearing minerals in deeply incised terrain. The method utilizes UAVs to acquire hyperspectral imagery and LiDAR topographic data; calculates the true solar-sensor observation geometric parameters of the deeply incised surface; designs a terrain shadow reflectance recovery model (TSRR) to recover reflectance in shadowed areas, and constructs a multi-parameter atmospheric correction lookup table (LUT) based on model 6S; constructs a radiative transfer-bidirectional reflectance distribution function (DIT-BRDF) model to correct for surface angle variations in deeply incised areas, and obtains the corrected spectral and spatial information; and constructs a lithium-bearing mineral identification model (SST) to automatically identify spodumene, lepidolite, lithiometrazine, and phosphogypsum. This invention significantly improves the accuracy and efficiency of remote sensing detection of lithium deposits under complex terrain conditions, providing a new technical approach for the rapid identification and quantitative assessment of lithium deposits in deeply incised areas.

A satellite module for attitude determination includes a containment body comprising at least one data acquisition board and a connection interface, at least one first-type sensor selected from a sun sensor, an earth sensor, a stellar sensor, a horizon sensor, in communication with the data acquisition board and at least one second-type sensor, different from the first type, selected from a sun sensor, an earth sensor, a stellar sensor, a horizon sensor, and in communication with the data acquisition board. The connection interface may be mounted on a first face of the containment body, the first-type sensor may be mounted on a second face of the containment body, and the second-type sensor may be mounted on a third face of the containment body.

A method (200) for managing a home automation system (100) comprising a sunshade (3), a control unit (102) for the position of the sunshade (3), and a solar sensor, the method comprising: A measurement step (EMes) of information related to solar radiation (R) over a first period of time; A control step (EPilo) of the position of the sunshade (3) over a control time period, subsequent to the first period of time, based on seasonal information (S) related to the control time period; Characterized in that the method (200) comprises a determination step (EDet) of seasonal information (S) related to the control time period, which is determined based on information related to solar radiation (R) measured over the first period of time. Figure 4

The application provides a sunshade control method and device and a storage medium. The method comprises the following steps: acquiring climate data and a relative position between a target building and the sun from a sun sensor; acquiring at least one eye position of a detected indoor user from at least one visual sensor, the eye position representing the height position of the eye of the indoor user relative to the ground; determining a target position based on the at least one eye position; determining spectral data and vertical eye illuminance from a preset mapping table based on the climate data, the relative position and the target position, the spectral data representing the light intensity in the room, and the vertical eye illuminance representing the intensity of the light in the room entering the eyes of the indoor user; determining corresponding control parameters according to the spectral data and the vertical eye illuminance; and controlling the glass in the sunshade control device to adjust the corresponding position and angle based on the control parameters. The above method can finely meet the rhythm stimulation needs of the human body at different time periods.

The invention discloses a large-view-field sun sensor for a spacecraft and a method, and relates to the technical field of light detection. The large-view-field sun sensor comprises a polyhedral base and a plurality of light intensity detection units, the polyhedral base is provided with a plurality of detection surfaces arranged on the side edge of the polyhedral base, and each detection surface is obliquely arranged in the same direction of the polyhedral base and is distributed in a convex divergent shape; the light intensity detection unit is arranged on the detection surface, and the light intensity detection unit is configured to output a light intensity signal in proportion to the effective coverage area of sunlight on the light sensing surface of the light intensity detection unit. The projection areas of the polyhedral base and the light intensity detection unit are used for detecting light intensity signals, a wide-angle lens system needed by a traditional imaging type sensor is replaced, the problems of optical distortion and non-uniform energy distribution of a wide-angle lens in an edge view field are solved, the view field is greatly expanded, and meanwhile the light intensity of the wide-angle lens is greatly improved. And high-precision measurement in a view field range is also ensured.

The invention discloses a large-view-field high-precision sun sensor based on a polarization multiplexing metasurface array, which comprises a CMOS (Complementary Metal Oxide Semiconductor) image sensor and a metasurface array serving as a light introducer, the metasurface array realizes view field multiplexing through a plurality of superposing metasurface lens units with different deflection phases, and meanwhile, by utilizing a polarization multiplexing technology, the polarization multiplexing metasurface array can be used as a light guide device. Enabling each super-structure lens unit to form a pair of double light spots on the CMOS image sensor, wherein the double light spots are arranged at an interval and serve as visual axis codes; by resolving the distance between the two light spots, all the sub-view fields can be recognized in an unambiguous manner, and a global view field is synthesized, so that the inherent contradiction that a large view field and high precision of a traditional digital sun sensor cannot be considered at the same time is solved. The system has the advantages of large field of view and high precision, the lightweight design of the system adapts to the high-density integration requirement, and technical support is provided for spacecraft attitude measurement.

A revolving sun-tracking structure includes a base having a center, a first face, a second face opposite the first face, and an outer edge. Affixed to the second face is an axle with first and second ends, and a second axle with third and fourth ends. Wheels are rotationally coupled with the ends, configured for rotation, and one such wheel is a drive wheel. A drive unit is affixed to the second face, wherein the drive unit is rotationally coupled to the drive wheel. Furthermore, the revolving sun-tracking structure includes a solar sensor array attached to the first face along the outer edge of the base, configured to detect solar radiation intensity and communicate electronically with a control unit attached to the second face. Such configuration allows for the base to rotate such that the revolving sun-tracking structure maintains a neutral position relative to solar radiation exposure, maximizing such exposure.

A self-charging electric vehicle configured for converting solar energy and wind energy into electrical energy comprising a systems and methods. The vehicle includes a body and frame with a central body structure and centerline cabin and a chassis with a centerline battery compartment and a suspension system. Solar cells mounted to the vehicles top sides can be supplemented with extendable solar panel(s) that can be deployed by a control system to generate solar energy into electrical energy. An omnidirectional sun sensor provides for sun strength, angle and direction. A stowable horizontal-axis wind turbine with an extendable mast mounted to the vehicle that can be deployed by a control system to generate wind energy into electrical energy. A stowable anemometer provides for wind speed and wind direction.

Antiglare device for vehicles comprising a retractable sunvisor, a sun sensor and a control unit; the retractable sunvisor comprising a sunvisor screen and a movement mechanism to provide a sliding and rotating movement; the sun sensor comprising one to sixteen photosensors is a unique part; the device also comprises an acceleration sensor comprising one to three accelerometers; the control unit being connected to the movement mechanism, the sun sensor and the acceleration sensor, taking into account all the measurements of the sun sensor and the acceleration sensor. Method of use of the antiglare device that measures the sun light incident angle and intensity, calculates in the control unit of an extent of sliding and / or rotation of the sunvisor screen; the measure step also includes to measure the vehicle movement by the acceleration sensor. The device and method provide an adaptation of the position of the sunvisor at all driving conditions.