117 results about "Solar angle" patented technology

This invention generally relates to automated shade systems that employ one or more algorithms to provide appropriate solar protection from direct solar penetration; reduce solar heat gain; reduce radiant surface temperatures; control penetration of the solar ray, optimize the interior natural daylighting of a structure and optimize the efficiency of interior lighting systems. The invention additionally comprises a motorized window covering, radiometers, and a central control system that uses algorithms to optimize the interior lighting of a structure. These algorithms include information such as: geodesic coordinates of a building; solar position; solar angle solar radiation; solar penetration angles; solar intensity; the measured brightness and veiling glare across a surface; time, solar altitude, solar azimuth, detected sky conditions, ASHRAE sky models, sunrise and sunset times, surface orientations of windows, incidence angles of the sun striking windows, window covering positions, minimum BTU load and solar heat gain.

The invention which discloses a precision compensation method for an area APS digital sun sensor belongs to the spacecraft attitude control measure system field. The precision compensation method comprises the small-angle incidence angle precision compensation and the wide-angle incidence angle precision compensation. The precision compensation method comprises the following steps: 1, carrying out primary rotation correction on the solar faculae center coordinate value which is obtained through the calculation of a sun sensor image processing chip and is input by the sun sensor image processing chip; 2, carrying out secondary correction on the coordinate value of the wide-angle incidence angle, and utilizing the rotarily-corrected coordinate value to do the coordinate mapping of a refraction model; 3, calculating through an uniaxial higher-order polynomial fitting process to obtain the solar angle tangent value, utilizing the rotarily-corrected coordinate value to calculate if the incidence angle is a small angle, and utilizing the secondarily-corrected coordinate value to calculate if the incidence angle is a large angle; and 4, finding the arc tangent to obtain the sun angle value. The precision compensation method which is suitable for the precision compensation of the area APS array digital large-field sun sensor has the advantages of major error factor compensation and high precision.

The invention discloses an error correction method for a digital sun sensor. The method comprises the following steps of: 1, determining a proportional correction factor of a theoretical measured value and an actual measured value of a distance from a projection center of a speckle produced by a light introducer on an image sensor to an imaging point during vertical incidence of sunshine; 2, establishing an iterative equation; and 3, performing iterative computation to correct errors, selecting a measured value of a sunshine incident angle as an initial angle of iteration, converging to obtain the value of the angle so as to solve the correction factor in the step 1, and finally correcting the measured value according to the formula of the first step so as to obtain the theoretical measured value. The invention also provides a digital sun sensor based on the method, which can quickly and accurately correct errors and has resolution of 0.02 degree and two axial vision angles of 120 degrees. Thus, power consumption is greatly reduced, data refresh rate is increased, cost is reduced, and high-accuracy solar angle measurement in a large vision angle range is realized.

The present invention provides a method for the attitude control of satellites in elliptic orbits or satellites initially placed in circular orbits perturbed to elliptic orbits due to environmental disturbances. The method relies on the application of solar radiation pressure to provide the desired torque for the satellite attitude control. The satellite is equipped with two-oppositely placed light-weight solar panels extending away from the satellite along a predetermined direction (satellite body fixed Y-axis). By rotating one of these solar panels or both of them through desired angles about their axis using the respective driver motors as per the simple open-loop control law, the torque about the satellite axis is developed to achieve the desired attitude performance. The open-loop control law is derived using an analytical approach to neutralize the excitation caused by eccentricity and it is implemented via analog logic based on the information of sun angle and satellite position provided by the sensors. The present invention significantly improves the performance of the satellite by a factor of more than 20 times approximately in general and it only requires the rotation of the solar panels by fraction of a degree for particular system parameters. Thus, the semi-passive nature of the present invention makes it attractive for future space applications.

The invention relates to a solar street lamp structure with an adjustable angle, which comprises a street lamp holder, a light-emitting unit, a solar panel, a power accumulating part and a braking part, wherein a bracket of the street lamp holder is movably combined with a bearing part through a coupling unit, and the power accumulating part is arranged in the street lamp holder; and a braking unit of the braking part is arranged between the bracket and the bearing part, thus the braking part can adjust the angle between the bearing part and the bracket through the braking unit so that the light-emitting unit and the solar panel which are arranged at the bearing part can be adjusted synchronously. Thus, the solar panel can be adjusted with the solar angle to increase the power generation efficiency, and the light-emitting unit can also be adjusted to change the illumination direction of the solar street lamp structure, thereby achieving the effect of extending the application range of the solar street lamp structure.

The invention discloses a control circuit of a solar power generation tracking system. The control circuit of the solar power generation tracking system mainly consists of a tracking module, a single chip microcomputer controller, a driving unit and an energy conversion unit. The tracking module integrates photoelectric tracking and sun angle tracking, wherein the sun angle tracking is adopted at the first stage, and a photoelectric sensor is adopted at the second stage to correct tracking. The driving unit drives a stepping motor to run and respectively controls pole-around shaft rotation and pitch angle adjustment to achieve automatic sun tracking. The energy conversion unit utilizes a Stirling heat engine to convert solar energy heat into mechanical energy and utilizes a Stirling motor to convert the converted mechanical energy into electric energy. Wind speed and direction, illumination intensity and solar cell parameters are detected in real time while tracking. The receiving rate of a photovoltaic cell can be greatly improved, solar energy resources can be effectively and fully utilized, and the solar energy application field is widened.

The invention relates to the field of satellite development, in particular to a satellite configuration design method adapting to one-rocket multi-satellite launching. According to the method, for the illumination characteristic that the solar angle of a low-dip-angle orbit changes in a large range, an outer surface corresponding to the lower bottom of a satellite trapezoidal cross section is improved to be an arch formed by three panels in an enclosing mode to serve as an installing surface for fixing a solar cell array, and iterative optimization is conducted on included angles of the three cell panels. A satellite configuration designed through the method can be equivalent to the satellite configuration formed by a prismoid with a trapezoidal cross section and two slant prismoids with trapezoidal cross sections. The satellite configuration design method adapting to one-rocket multi-satellite launching has the main advantages that a solar wing spreading and driving mechanism is not arranged for each satellite, the weights of the satellites are reduced, and the reliability of the satellites is improved; a flight mission of long-time over-the-ground three-axis stable operation of a low-oblique-angle orbit can be met.

The invention provides a photovoltaic string azimuth angle determination method and device and electronic equipment, and the method comprises the steps: obtaining a power generation performance data sequence of a photovoltaic string and sun angles at different moments, and the power generation performance data sequence comprises power generation performance data of the photovoltaic string at different moments; determining a maximum data moment corresponding to maximum power generation performance data in the power generation performance data sequence, and establishing an objective function according to the sun angle and the power generation performance data at each moment; and determining the string azimuth angle of the photovoltaic string according to the maximum data moment and the objective function. According to the technical scheme, the workload and labor cost for determining the azimuth angle of the photovoltaic string are reduced.

The present invention relates to a tracking-type blinds device using solar modules, and more specifically, the device comprises: a plurality of shade slats spaced apart at preset intervals so as to regulate the amount of light passing therethrough; solar modules attached to the plurality of shade slats and generating electricity by using the sunlight; a driving unit connected to the plurality of shade slats so as to respectively adjust the inclination angles of the shade slats and a distance between the shade slats; and a control unit for setting any one operation mode of a power generation mode, a privacy protection mode, and a lighting mode according to a user command, and respectively controlling the inclination angles of the shade slats and the distance between the shade slats according to the set operation mode, the current solar term, and a visual angle and solar angles.