33results about How to "Low tracking accuracy requirements" patented technology

An operator of a monitored instrument is authenticated and a maintenance function for the monitored instrument is released. The head of the authenticated operator is then tracked in a dynamic image and the maintenance function for the monitored instrument is operated when the tracking fails.

The invention discloses a composite device of light funnel light concentrating photovoltaic power generation and wind power generation, belonging to the technical field of solar energy and wind energy complementary power generation. The device consists of main parts such as a light funnel light concentrator, a photovoltaic battery board, a wind power generator, etc. After entering into the light funnel light concentrator, the sunlight is concentrated to the photovoltaic battery board though the reflection at the inner surface of the light funnel light concentrator, and the solar energy is converted into electrical energy by the battery board. The light funnel light concentrating photovoltaic power generation device improves light concentrating times, so as to improve the efficiency of thephotovoltaic battery board and have low requirement to track precision. Furthermore, the wind power generator is installed at the rear part of the light funnel light concentrator and can be driven tonormally generate power only with at least one level wind. The device mainly uses the light funnel light concentrating photovoltaic power generation and accessorially uses the wind power generation in the daytime and uses the wind power generation in the night, to realize continues power generation in the daytime and the night, and finally offer the converted electricity power generated by the wind and the light to a storage battery to be intelligently stored.

The invention provides a secondary reflection light gathering and heat collecting device with a compound curved surface, which relates to a solar slot type light gathering and heat collecting device and comprises a heat collecting tube (1), a plane primary reflector (2), a refracting plane secondary reflector (3), a compound circular arc primary reflector (4), a compound paraboloid secondary reflector (5) and a supporting frame (6), wherein the heat collecting tube (1) comprises two parallel heat collecting tubes and is positioned in the compound paraboloid secondary reflector (5), and the supporting frame (6) is positioned below the compound circular arc primary reflector (4) and used for fixing the compound circular arc primary reflector (4). By adopting the design of combination of onesupporting frame and two heat collecting tubes, the cost and the height of the heat collecting device can be remarkably reduced; by adopting the compound paraboloid secondary reflector, the requirement on the tracking accuracy is reduced; by adopting the compound circular arc primary reflector, the degree of freedom of the design is increased; and by adopting the design of combination of the planereflector and the refracting plane, the utilization ratio of the light energy is improved.

The invention discloses a low-concentration photovoltaic component. The photovoltaic component comprises a back panel, a light receiver and a concentrating system, wherein the back panel comprises a substrate and a metal foil; the surface of the metal foil is cut into a plurality of insulated periodic units; the substrate and the metal foil are adhered together through an insulating heat-conducting adhesive; the light receiver consists of serial solar cell chips of a plurality of linearly arranged glass substrates and is adhered in the periodic unit on the metal foil through the insulating heat-conducting adhesive; the adjacent solar cell chips are connected through the metal foil; and the concentrating light comprises a light focusing strip-shaped lens, a parabolic trough, a combined parabolic surface and an auxiliary element. By using the photovoltaic component, the sunshine can be focused on the light receiver with low cost and high efficiency under the optimal focusing condition so as to obtain the maximum photovoltaic conversion efficiency. The low-concentration photovoltaic component reduces the difficulty and the cost for heat dissipation and sun tracking while reducing theseries resistance, the machining method for the component is simple and reliable, and the manufactured component has stable performance.

The invention discloses an acquisition system and method for high data rate direct sequence spread spectrum signals under a large Doppler dynamic condition. A coarse acquisition based on symbol jump edge detection, and a precision controllable Doppler spectrum analysis are employed in the method. The coarse acquisition based on symbol jump edge detection can acquire data symbol jump edge positions, pseudo code phases and primary Doppler frequency offset estimates of the direct sequence spread spectrum signals. Coarse acquisition results are verified through the spectrum analysis, and a final Doppler frequency offset estimation whose accuracy is lower than dozens of Hertz is obtained, so that requirements on tracking loops are significantly reduced. By employing the method, the high data rate direct sequence spread spectrum signals with low signal-to-noise ratios under the large Doppler dynamic condition can be rapidly acquired.

The invention discloses an octahedral low-concentration photovoltaic unit body. The octahedral low-concentration photovoltaic unit body comprises a photovoltaic battery which is square or similar to a square, as well as four front side surface light reflecting plates and four inclined side surface light reflecting plates, which are arranged around the photovoltaic battery; each front side surface light reflecting plate contains a rectangular effective light reflecting surface; each inclined side surface light reflecting plate contains a rhombic effective light reflecting surface; each rectangular effective light reflecting surface and each rhombic effective light reflecting surface reflect the incident light which is perpendicular to a plane in which the photovoltaic battery is positioned, and the surface of the photovoltaic battery is just full of the generated reflected light uniformly. The invention further discloses a concentrating photovoltaic assembly and a concentrating photovoltaic power generating device which consist of the octahedral low-concentration photovoltaic unit body. The limit concentration ratio of the octahedral low-concentration photovoltaic unit body disclosed by the invention can reach 9; the radiation received by the photovoltaic battery is uniform; compared with the conventional reflecting type low-concentration technical scheme, the radiation quantity and the electricity generating capacity of the photovoltaic battery in a unit area are greatly improved.

The two-stage concentrating sunlight concentrating device of the present invention mainly includes a first-stage concentrating unit, a second-stage concentrating unit, a bracket and an optical fiber; wherein the first-stage concentrating unit and the second-stage concentrating unit are fixed on the bracket , and coupled on the incident light path of the sun, wherein the first-level concentrating unit is used to initially condense sunlight; the second-level concentrating unit is used to re-condense the sunlight collected by the first-level concentrating unit. The beneficial effect lies in that the size of the focused spot of sunlight is reduced. At the same time, the position of the silica fiber can be adjusted through the screw on the fiber collimator, so that sunlight of different spectra can be adjusted to enter the fiber, and the purpose of selectively transmitting the solar spectrum can be achieved. Transmission can be carried out through small-diameter silica optical fibers, reducing costs. At the same time, the larger aperture stop of the fiber collimator can effectively reduce the requirements for tracking accuracy. The spectrum of sunlight can be selectively transmitted by adjusting the position of the fiber in the fiber collimator.

The invention discloses a multifunctional solar energy storage device and a use method thereof. The multifunctional solar energy storage device is simple in structure and comprises a solar cooker module and a solar energy storage box which can be placed on a bracket of the solar cooker module. The design of the reflective surface and an extended absorbing coating is adopted, slightly-deviated sunlight can be reflected and collected, the tracking accuracy requirement for a system is low, and the utilization rate of solar energy is increased; meanwhile, the energy storage and use efficiency isimproved through the design of the energy storage box; using is convenient, energy saving and environmental protection are achieved, and application is wide; and the multifunctional solar energy storage device is used for cooking, water boiling, heating, drying, power generation and the like, and the problems of an existing solar cooker are solved.

The invention discloses a maintenance-free dry-running slewing bearing structure for sun tracking, which comprises a housing, a drive motor, and a worm and a turbine arranged in the housing and meshing with each other. The housings corresponding to the two ends of the worm are provided with The left and right glands are respectively provided with left and right stepped sliding sleeves made of engineering plastics between the left and right glands and the worm, and the left and right stepped sliding sleeves are respectively connected to the corresponding left and right The right gland is tightly fitted to form an integral structure. The inner walls of the left and right stepped sliding bushings are attached to the worm, and the worm can rotate relative to the left and right stepped sliding bushings. The threaded surface is injection-molded with engineering plastics and has a compound layer. By analyzing the operation mode of the sun tracker and combining the characteristics of modern engineering plastics and composite technology, the present invention makes a maintenance-free dry running design for the slewing bearing used for sun tracking, so that it can completely get rid of the trouble of lubrication failure and ensure Its long-term reliable operation.

A method includes receiving first tracking data and a first confidence value at a tracker selection system from a first tracking system. The method includes receiving second tracking data and a second confidence value at the tracker selection system from a second tracking system. The tracking systems may be configured to track an object in a sequence of images, and the first and second tracking data may indicate locations of regions where the corresponding tracking system has tracked the object in an image of the sequence of images. The confidence values may indicate likelihoods that a corresponding tracking system is tracking the object. The method further includes providing output data to the first tracking system and to the second tracking system. The output data may include data selected from the first tracking data and the second tracking data based on a result of a comparison of the confidence values.

The invention belongs to the technical field of photoelectricity and relates to an earth axis type solar concentrating photovoltaic generating device. The device consists of a series of solar concentrating photovoltaic generating units with the same structure; and each unit is arranged on a bracket. The solar concentrating photovoltaic generating unit consists of a reflecting optical collector, asingle-axis tracking device, a non-imaging optical collector and an optical collecting solar cell which are connected into a whole through a single axis. The optical collecting system of the solar concentrating photovoltaic generating unit is a fixed focus-type point focusing system and has high light collecting ratio. The surface shape of the reflecting optical collector adopts a curved surface of a tire, can correct astigmatism and improve light collecting performance. In a single-axis tracking mode, a rotating axis of is parallel to the earth axis; and a mechanical structure of the tracking device and a control system are simple. The solar concentrating photovoltaic generating unit can realize batch production and effectively reduce cost for solar power generation.

The invention discloses a tower type solar thermal power generation system for a heat absorber of vacuum heat absorption pipes, which is characterized in that water / steam is taken a heat transfer fluid, and fusion salt is taken as a heat storage medium. The tower type solar thermal power generation system comprises a heliostat (1), a support tower (2), a heat absorber (3), a steam turbine (4), a generator (5), a deaerator (6), a condenser (7), a water feed pump (8), a high-temperature fusion salt storage tank (9), a low-temperature fusion salt storage tank (10), a water / steam-fusion salt heat exchanger (11), a fusion salt steam generator (12) and a control valve (13). The heat absorber (3) is formed by connecting the vacuum heat absorption pipes (18) in series and in parallel. According to the invention, the heliostat is arranged in a fan-shaped manner, a rectangular manner or a circumferential manner, the high-temperature and high-pressure overheating steam is obtained, and the solar thermal power generation system is suitable for a large installed capacity tower type solar thermal power generation station.