36results about How to "Improve light receiving effect" patented technology

An optical receiving apparatus has a route change detector for detecting occurrence of a route change of received signal light, a memory for beforehand storing optimum dispersion compensation quantity for the received signal light before and after the route change, a tunable dispersion compensator for compensating dispersion of the received signal light, and a controller for controlling a dispersion compensation quantity used by the tunable dispersion compensator according to the optimum dispersion compensation quantity for the received signal light after the route change, which is beforehand stored in the memory, when the route change detector detects occurrence of the route change. The dispersion compensation quantity can be optimized at high-speed for each of optical transmission routes of the received signal light.

A quantum dot-trap infrared receiver structure includes: a semi-insulating GaAs underlay, a GaAs bottom contact layer which is made on the semi-insulating GaAs underlay, a lower GaAs isolation layer which is made at one side of the GaAs bottom contact layer, and a table-board is formed at the other side of the GaAs bottom contact layer; an InAs/InGaAs dot-trap structure layer with 10 periods is made on the lower GaAs isolation layer and is the core part in which photocurrent is formed and the infrared detection is finally realized; a GaAs top contact layer is made on the InAs/InGaAs dot-trap structure layer with 10 periods; an upper electrode is made on the middle part of the GaAs top contact layer, and the externally added voltages carried on the detector can be realized by the upper electrode; the lower electrode is made on the table-board of the GaAs top contact layer, and the externally added voltages carried on the detector can be realized by the lower electrode.

The invention discloses a photovoltaic panel mounting structure, which comprises a photovoltaic panel assembly and a support assembly, wherein the photovoltaic panel assembly comprises a support plate; the upper end surface of the support plate is provided with a plurality of parallelly-distributed grooves; each groove is internally embedded with a plurality of photovoltaic panels distributed along the groove length direction; the side wall of each groove is provided with a folded edge extending towards the middle part of the groove for pressing the photovoltaic panel; the support assembly comprises a bottom plate; one end of the bottom plate is hinged with one end of the support plate; a motor is fixed on the bottom plate; the output shaft of the motor is connected with a screw rod; two ends of the screw rod are in rotating connection with a pair of bearings fixed on the bottom plate; a sliding block is in screw connection onto the screw rod; the bottom plate is provided with a sliding rail; the sliding block is connected onto the sliding rail in a sliding mode; a support rod is hinged at the back part of the support plate; and one end, far away from the support plate, of the support rod is hinged with the sliding block. The photovoltaic panel mounting structure has the advantages that the mounting efficiency is high; the maintenance and the repair are convenient; and the angle formed between the photovoltaic panel and the sunlight can be flexibly adjusted.

The invention discloses silver paste used for printing a crystalline silicon solar cell. The silver paste used for printing the crystalline silicon solar cell is characterized by comprising paste A and paste B, wherein the paste A comprises 80-90% of silver-coated copper powder, 3-5% of paste A glass powder and 5-17% of paste A organic carrier based on mass percentages; and the paste B comprises 85-95% of silver powder, 1-2% of paste B glass powder and 4-13% of paste B organic carrier based on mass percentages. The silver paste used for printing the crystalline silicon solar cell is relatively low in cost and capable of ensuring photoelectric conversion efficiency.

The invention discloses a solar greenhouse for flowering plants in winter in high and cold areas. The solar greenhouse for flowering plants in winter in high and cold areas comprises a cold-proof layer, a front wall, a lighting roof, a peak, a rear roof, a rear brick wall, polystyrene boards, an air vent, a biomass reverse-burning multi-pass low-carbon energy-saving water boiler, a cotton quilt, an electric roller shutter machine, and a sun-shading net rack. Lighting angles of roof positions 0.5m-1.5m, 1.5m-2.5m, 2.5m-3.5m, 3.5m-4.5m, 4.5m-5.5m, 5.5m-6.5m and 6.5m-7.5m away from the front wall inside greenhouse are 53DEG-57DEG, 48DEG-52DEG, 43DEG-47DEG, 38DEG-42DEG, 33DEG-37DEG, 28DEG-32DEG, and 23DEG-27DEG respectively. A vertical line of the peak is 0.5-1.5m away from the inner side of the rear brick wall. The peak is 4.4-4.6m off the indoor floor. The polystyrene boards are disposed in the middle of the rear brick wall. The top of the rear wall has an inner elevation of 63DEG-67DEG apart from the roof. The biomass reverse-burning multi-pass low-carbon energy-saving water boiler is disposed in the greenhouse.

The invention provides a fruit and vegetable planting frame convenient to move, and relates to the technical field of fruit and vegetable planting frames. The fruit and vegetable planting frame convenient to move comprises a planting frame body, wherein a moving device is arranged in the planting frame body; sliding grooves are formed in a framework body of the planting frame body; second slidingblocks are respectively in sliding connection to each sliding groove; a fruit and vegetable placing disk is fixedly connected to each second sliding block; a limiting block is fixedly connected to oneside of each second sliding block; and a first gear is movably connected to the planting frame body. According to the fruit and vegetable planting frame convenient to move disclosed by the invention,through the united arrangement of the planting frame body, supporting columns, the moving device, a telescopic rod, first fixing rods, a sliding rod, a first sliding block, a first connecting rod, afixing wheel, a first supporting rod, a second fixing rod and moving wheels, the moving wheels of the device can achieve the effect of moving up and down; and when moving is needed, the fruit and vegetable planting frame convenient to move can be moved, and when moving is not needed, the fruit and vegetable planting frame convenient to move is fixed to prevent moving.

The invention provides a basketball frame device used for physical education. The device includes a bottom plate, the bottom plate fixedly arranged on the ground through an anchor bolt, the upper sideof the bottom plate is fixedly connected with a support frame, the support frame is provided with a groove with an opening facing upward, a threaded rod is arranged in the groove, the bottom of the threaded rod is rotatably connected with the bottom of the support frame, the lower portion of the threaded rod is fixedly connected with a first bevel gear, the left side of the first bevel gear is meshed with a second bevel gear, the left end of the second bevel gear is fixedly connected with a first rotating shaft, the first rotating shaft passes through the support frame and extends outward, and the left end of the first rotating shaft is fixedly connected with a handle; a lifting cylinder is arranged in the groove above the threaded rod, and the lifting cylinder is provided with a threadedgroove with an opening facing downward. The device has the advantages that a solar photovoltaic panel can convert optical energy into electric energy, then electric energy is then supplied to an illuminating lamp, and training can be conducted at night. The solar photovoltaic panel device is used for improving vthe light receiving effect of the solar photovoltaic panel.

The invention discloses a solar greenhouse for flowering plants in winter in northern China. The solar greenhouse for flowering plants in winter in northern China comprises a cold-proof layer, a front wall, a lighting roof, a peak, a rear roof, a rear brick wall, polystyrene boards, an air vent, a cotton quilt, an electric roller shutter machine and a sun-shading net rack. The solar greenhouse is 5DEG-8DEG oriented by west. The span from the front wall to the rear brick wall is 7-9m. lighting angles of roof positions 0.5m-1.5m, 1.5m-2.5m, 2.5m-3.5m, 3.5m-4.5m, 4.5m-5.5m, 5.5m-6.5m and 6.5m-7.5m away from the front wall inside the greenhouse are 53DEG-57DEG, 48DEG-52DEG, 43DEG-47DEG, 38DEG-42DEG, 33DEG-37DEG, 28DEG-32DEG, and 23DEG-27DEG respectively. The peak is 4.4-4.6m vertically off the indoor floor. A slant of the rear roof is 1.1-1.3m in length. The rear brick wall is 3-4m in height. The polystyrene boards 15-25cm thick are arranged in the middle of the rear brick wall. The top of the rear brick has an inner elevation of 63DEG-67DEG apart from the inner roof.

The invention discloses a solar photovoltaic support suitable for windy and dusty areas and convenient for angle adjustment, belongs to the field of solar photovoltaic supports, can reduce the straight surface impact strength of fine sand in wind and reduce the possibility of damage to a solar photovoltaic panel, and when the wind and sand stop, a buffer shielding layer is matched with a spiral elastic piece to quickly roll and reset. Daily photovoltaic operation is maintained, and the angle of a connecting frame and the solar photovoltaic panel is changed, so that the windward area of the solar photovoltaic panel impacted by wind and sand is reduced, the possibility that the solar photovoltaic panel is directly impacted by sundries such as zip-top cans is reduced, the possibility that the solar photovoltaic panel is damaged is reduced, and property loss is reduced. When wind and sand completely stop, a connecting frame and the solar photovoltaic panel are subjected to angle resetting through an elastic supporting frame, a buffer shielding layer is tightly attached to the solar photovoltaic panel all the time in the sandstorm process, dust residues on the surface of the solar photovoltaic panel are reduced, and the normal light receiving condition of the solar photovoltaic panel is maintained.

A diffractive optical element 1 has a diffraction grating which multiplexes the light beam of the different wavelength, and the diffraction grating is structured by a binary structure in which the diffraction surface top part 2 and the diffraction surface bottom part 4 repeat the concave and convex shape through a rising surface 3 part along the optical axis direction P, and the diffraction surface top part and the diffraction surface bottom part are inclined to the rising surface part. By this diffractive optical element 1, the diffraction angle of the light beam is maintained, and the diffraction efficiency of the light beam can be improved. Then, by using this diffractive optical element 1, the optical communication module in which, while the separation angle of the light beam of the different wavelength is maintained, the signal receiving performance is increased, can be provided.

The invention discloses a method for auxiliary etching the conical array silicon surface through pine structure porous copper. Firstly the pine wood is sintered in the non-oxidizing atmosphere to obtain porous carbon having a pine structure, then the porous carbon is immersed in a copper nitrate solution, and porous copper having the pine structure is obtained after drying and anaerobic sintering;and the porous copper acts as the catalyst and is put on the silicon plane, monocrystalline silicon is immersed in a corrosive, and the silicon surface is corroded under the catalytic auxiliary effect of the copper so as to form the conical array silicon surface having the opposite convex-concave structure of that of the porous copper. According to the manufactured silicon surface conical array structure, the microscopic structure of the pine is topological, high degree of learning from the nature is realized and the excellent hydrophobicity and the photon receiving capacity can be acquired;and the acquired conical array silicon surface has the advantages of further narrow top part and smaller contact area with the water so that the adhesion of the silicon surface to the water can be further reduced and the better hydrophobicity can be acquired.

The invention discloses a winter vegetable sunlight greenhouse in alpine regions. The winter vegetable sunlight greenhouse comprises a cold-proof layer, a front wall, a daylighting roofing, a greenhouse top, a rear roofing, a cob wall, a biomass counter-burning multipass low-carbon and energy-saving hot water boiler, a hot water outlet pipe, a heat sink, a water return pipe, a chimney, a cotton quilt and an electric roller shutter machine, wherein the front wall is taken as a starting point; the corresponding roofing daylighting angles are 53 DEG -57 DEG, 48 DEG -52 DEG, 43 DEG -47 DEG, 38 DEG -42 DEG, 33 DEG -37 DEG, 28 DEG -32 DEG and 23 DEG -27 DEG respectively at the distances of 0.5 m -1.5m, 1.5 m -2.5m, 2.5 m -3.5m, 3.5 m -4.5m, 4.5 m -5.5m, 5.5 m -6.5m and 6.5 m -7.5m from the front wall; a distance from a perpendicular line of the greenhouse top to the interior of the cob wall is 0.5-1.5m; a height from the greenhouse top to an indoor ground plane is 4.4-4.6m; an elevation angle between a top part of the cob wall and the interior of the greenhouse roofing is 63 DEG -67 DEG; a base angle located in the greenhouse is 80 DEG -90 DEG; and the biomass counter-burning multipass low carbon and energy-saving hot water boiler is arranged in the greenhouse.

The invention provides a slot type solar energy collection device based on a black body absorption principle. A rotary table fixedly-connected gear is installed on the lower portion of a heat collection device rotary table of the device, a paraboloid heat collection tube joint shaft drives two heat collection tube supporting columns and a parabolic reflector to rotate axially, a heat collection tube is installed on the two heat collection tube supporting columns, a water pump is communicated with the heat collection tube through two flexible water tubes to form a water circulation passage, a gap is formed in the side face of the heat collection tube which is of a double circular tube sleeve cavity structure, and an interlayer of a double circular tube is filled with a nanofluid medium; a photoelectric sensor and a temperature sensor transmit a sensed signal to a control integrated box. The problems that for an existing slot type solar energy collection heat collection technology, the heat collection tube heat collection efficiency is low, the heat transmission efficiency is low, and the heat loss is large are solved. Accordingly, the collection efficiency and transmission efficiency are improved, and by means of an aerogel insulating layer, heat loss due to radiation is reduced; by means of a light chasing system and a temperature control system, the whole adaptability of the device is improved.

The invention discloses a passivated emitter region back surface partial diffused crystalline silicon solar cell preparation method. The method includes the following steps of: silicon wafer front surface inverted pyramid structure production; silicon wafer back surface partial region boron diffusion; silicon wafer front surface gate interdigital electrode heavy phosphorous diffusion; silicon wafer front surface light phosphorus diffusion; silicon wafer front surface silicon oxide (SiO2) anti-reflection passivation layer deposition; silicon wafer back surface silicon oxide (SiO2) passivation layer deposition; silicon wafer back surface electrode contact hole photoetching; silicon wafer front surface gate interdigital electrode lead hole photoetching, silicon wafer front surface gate interdigital electrode evaporation; silicon wafer back surface aluminum electrode evaporation; silicon wafer front surface electrosilvering and annealing; and solar cell formation. With the method of the invention adopted, the front surface of a cell is of an inverted pyramid structure, and the light receiving effect of the cell is better than that of an ordinary texturized surface structure, and the cell has very low reflectivity, and therefore, the Jsc of the cell can be improved.