CN104834324A - Sun tracking controller and method based on sun movement locus and image acquisition - Google Patents
Sun tracking controller and method based on sun movement locus and image acquisition Download PDFInfo
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- CN104834324A CN104834324A CN201510244582.2A CN201510244582A CN104834324A CN 104834324 A CN104834324 A CN 104834324A CN 201510244582 A CN201510244582 A CN 201510244582A CN 104834324 A CN104834324 A CN 104834324A
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Abstract
The invention brings forward a sun tracking controller based on a sun movement locus and image acquisition. The sun tracking controller comprises a liquid crystal display screen, a programmable logic controller, a motor-driven circuit, an aimuth motor, an elevation angle motor, a machinery tracking device, an image gatherer and an image processor, wherein the liquid crystal display screen is connected with the programmable logic controller, the programmable logic controller is connected with the motor-driven circuit, the motor-driven circuit is respectively connected with the azimuth motor and the elevation angle motor and then is connected with the machinery tracking device, the machinery tracking device is connected with the image gatherer, the image gatherer is connected with the image processor, and the image processor is connected with the programmable logic controller. The invention also brings forward a method based on a sun movement locus and image acquisition. The controller and the method provided by the invention have the advantages of low cost, small tracking errors, stable performance, and round-the-clock and automatic operation.
Description
Technical field
The present invention relates to a kind of solar tracking controller and method based on looking daily motion track and image acquisition, belonging to application of solar.
Background technology
Sun power is as a kind of energy of cleanliness without any pollution, and development prospect widely, utilizes photovoltaic, photo-thermal power generation to become the fastest technology of global evolution.But it also also exists shortcoming, as low in energy density, not easily collecting, instability, the change etc. along with the climate and weather day-night change in season, therefore have higher requirement to the utilization of sun power.In solar energy power generating field, under the same terms, automatic sun tracking generating system is adopted to improve 35% than the generated energy of stationary power generation system; In solar energy thermal-power-generating field, groove type solar, tower type solar and butterfly solar power system all must carry out sun accurate tracking.
Before making the present invention, domestic and international existing solar tracking system, by different criteria classifications, has a variety of tracking control, but in general, mainly comprises following 2 kinds: (1) photoelectric tracking mode; (2) daily motion track following mode is looked.
Photoelectric follow-up utilizes light sensor (as silicon photocell) to detect sunshine usually, and during installation, photoelectric tube is near shadow shield, and shadow shield faces the sun, and silicon photocell is positioned at the shaded side of shadow shield; When angle of incidence of sunlight degree changes, shade after shadow shield also offsets, also there is corresponding change in micro-electric current that photoelectric tube produces in direct sunlight, its deviate is sent to servomotor under the amplification of amplifying circuit, it is made to adjust corresponding angle, allow device aim at the sun, thus carry out solar tracking.Conventional photoelectric tracking mainly comprises gravity type, electromagnetic type and electrodynamic type three kinds.The advantage of photoelectric tracking is highly sensitive, and tracking accuracy is higher, makes simple.But comparatively large by weather effect, when appearance cloudy day or cloud layer cover the solar time, solar irradiance is more weak, and light sensor is difficult to the change responding sunshine, makes tracking means cisco unity malfunction, even causes the misoperation of mechanical actuating unit.
Principle of work depending on daily motion track following is: according to uranology formula, calculate the position of different longitude and latitude, the corresponding sun of date and time, then calculate the angle of tracking means needs adjustment, drive motor operates, make topworks meet the requirements of position, and then realize solar tracking.
Depending on the system that daily motion Trajectory Tracking System is an open loop, uranology computing formula is had high requirements.The running track from sun algorithm of Global Access is in different month, Various Seasonal, and error change is comparatively large, causes systematic tracking accuracy Growth season to change.
Summary of the invention
The object of the invention is, for the defect and the deficiency that overcome prior art existence, to provide a kind of solar tracking controller and method based on looking daily motion track and image acquisition.
The present invention proposes a kind of solar tracking controller based on looking daily motion track and image acquisition, it is characterized in that, comprise LCDs, programmable logic controller (PLC), motor-drive circuit, azimuth motor, elevation angle motor, mechanically tracking device, image acquisition device, image processor, described LCDs is connected with described programmable logic controller (PLC), described programmable logic controller (PLC) is connected with described motor-drive circuit, described motor-drive circuit respectively with described azimuth motor, after described elevation angle motor is connected, be connected with described mechanically tracking device again, described mechanically tracking device is connected with described image acquisition device, described image acquisition device is connected with described image processor, described image processor is connected with described programmable logic controller (PLC).
Preferably, mechanically tracking device 6 uses the first tracking carrying out the sun depending on daily motion track, and image acquisition device 7 is used for gathering the image of solar facula and the image of mechanically tracking device 6; Image processor 8 is used for producing pixel coordinate according to the image of the solar facula of image acquisition device 7 collection and the image of mechanically tracking device 6; LCDs 1 is used for arranging tracking time, realizes round-the-clock, full automatic solar tracking.
Preferably, mechanically tracking device 6 is condenser.
The present invention also proposes a kind of method of solar tracking controller based on looking daily motion track and image acquisition, it is characterized in that, specifically comprises the steps:
SS1 primer fluid crystal display screen 1 is followed the tracks of, and arranges tracking stand-by time, carries out system initialization, uses the first tracking carrying out the sun depending on daily motion track;
SS2 has just followed the tracks of rear startup image trace pattern and has carried out accurate tracking, judge whether sun position completes, if complete, start image acquisition device 7, image acquisition device 7 gathers the location drawing picture of solar facula location drawing picture and condenser 6, otherwise proceeds sun position;
SS3 judges that solar facula is whether in the coordinate range of image acquisition device 7, if in coordinate range, then image acquisition device 7 is positioned, location drawing image acquisition device 7 being gathered solar facula location drawing picture and condenser 6 processes as input picture processor 8, obtain condenser 6, the pixel coordinate of solar facula in image processor 8, otherwise return step SS2;
Pixel coordinate in step SS3 is sent to programmable logic controller 2 by SS4 to carry out asking for deviation, produce the elevation angle of condenser 6 and the angle of position angle needs rotation, and convert the position signalling of elevation angle motor 5, azimuth motor 4 to, control the rotation distance of motor, if elevation angle motor 5, azimuth motor 4 run to position, carry out tracking stand-by time and judge, otherwise elevation angle motor 5, azimuth motor 4 remain in operation;
SS5 judges whether tracking stand-by time arrives setting value, and the tracking stand-by time that stand-by time arrives LCDs 1 setting if follow the tracks of, then follow the tracks of end, wait until that next day follows the tracks of again, otherwise returns step SS2 continuation operation.
The beneficial effect that the present invention reaches: the present invention adopts the solar tracking mode combined with image acquisition depending on daily motion track, overcoming singlely needs to calculate sun altitude and azimuthal error of calculation depending on the daily motion track following sun, adopt the first tracking completing the sun depending on daily motion track simultaneously, image acquisition is adopted to complete the accurate tracking of the sun, have that cost is low, tracking error is little, stable performance, can the advantage of round-the-clock, full automatic operation.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of solar tracking controller based on looking daily motion track and image acquisition of the present invention.
Fig. 2 is a kind of process flow diagram of method of solar tracking controller based on looking daily motion track and image acquisition of the present invention.
Fig. 3 is the coordinate schematic diagram that image acquisition device of the present invention gathers.
Fig. 4 is coordinate computation algorithm schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Fig. 1 is a kind of structural representation of solar tracking controller based on looking daily motion track and image acquisition of the present invention, the present invention proposes a kind of solar tracking controller based on looking daily motion track and image acquisition, comprise LCDs 1, programmable logic controller (PLC) 2, motor-drive circuit 3, azimuth motor 4, elevation angle motor 5, mechanically tracking device 6, image acquisition device 7, image processor 8, LCDs 1 is connected with programmable logic controller (PLC) 2, programmable logic controller (PLC) 2 is connected with motor-drive circuit 3, motor-drive circuit 3 respectively with azimuth motor 4, after elevation angle motor 5 is connected, be connected with mechanically tracking device 6 again, mechanically tracking device 6 is connected with image acquisition device 7, image acquisition device 7 is connected with image processor 8, image processor 8 is connected with programmable logic controller (PLC) 2.
Mechanically tracking device 6 uses the first tracking carrying out the sun depending on daily motion track, and image acquisition device 7 is used for gathering the image of solar facula and the image of mechanically tracking device 6; Image processor 8 is used for producing pixel coordinate according to the image of the solar facula of image acquisition device 7 collection and the image of mechanically tracking device 6; LCDs 1 is used for arranging tracking time, realizes round-the-clock, full automatic solar tracking; Mechanically tracking device 6 is condenser.
Fig. 2 is a kind of process flow diagram of method of solar tracking controller based on looking daily motion track and image acquisition of the present invention, and the present invention also proposes a kind of method of solar tracking controller based on looking daily motion track and image acquisition, specifically comprises the steps:
SS1 primer fluid crystal display screen 1 is followed the tracks of, and arranges tracking stand-by time, carries out system initialization, uses the first tracking carrying out the sun depending on daily motion track;
SS2 has just followed the tracks of rear startup image trace pattern and has carried out accurate tracking, judge whether sun position completes, if complete, start image acquisition device 7, image acquisition device 7 gathers the location drawing picture of solar facula location drawing picture and condenser 6, otherwise proceeds sun position;
SS3 judges that solar facula is whether in the coordinate range of image acquisition device 7, if in coordinate range, then image acquisition device 7 is positioned, location drawing image acquisition device 7 being gathered solar facula location drawing picture and condenser 6 processes as input picture processor 8, obtain condenser 6, the pixel coordinate of solar facula in image processor 8, otherwise return step SS2;
Pixel coordinate in step SS3 is sent to programmable logic controller 2 by SS4 to carry out asking for deviation, produce the elevation angle of condenser 6 and the angle of position angle needs rotation, and convert the position signalling of elevation angle motor 5, azimuth motor 4 to, control the rotation distance of motor, if elevation angle motor 5, azimuth motor 4 run to position, carry out tracking stand-by time and judge, otherwise elevation angle motor 5, azimuth motor 4 remain in operation;
SS5 judges whether tracking stand-by time arrives setting value, and the tracking stand-by time that stand-by time arrives LCDs 1 setting if follow the tracks of, then follow the tracks of end, wait until that next day follows the tracks of again, otherwise returns step SS2 continuation operation.
Fig. 3 is the coordinate schematic diagram that image acquisition device of the present invention gathers, Fig. 4 is coordinate computation algorithm schematic diagram of the present invention, image acquisition device 7 by the location drawing of the solar facula location drawing picture collected and condenser as the coordinate position signal (x that can obtain solar facula in input picture processor 8
0, y
0) and the coordinate position signal (x, y) of condenser 6, solve the difference of the two,
Δx＝x-x
0；
Δy＝y-y
0；
Utilize this difference to calculate at programmable logic controller 2, obtain the angle of the sun altitude of condenser 6, position angle needs rotation, then driving elevation angle motor 5, azimuth motor 4 run to position, to realize sun accurate tracking.
Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (4)
1. one kind based on the solar tracking controller looking daily motion track and image acquisition, it is characterized in that, comprise LCDs (1), programmable logic controller (PLC) (2), motor-drive circuit (3), azimuth motor (4), elevation angle motor (5), mechanically tracking device (6), image acquisition device (7), image processor (8), described LCDs (1) is connected with described programmable logic controller (PLC) (2), described programmable logic controller (PLC) (2) is connected with described motor-drive circuit (3), described motor-drive circuit (3) respectively with described azimuth motor (4), after described elevation angle motor (5) is connected, be connected with described mechanically tracking device (6) again, described mechanically tracking device (6) is connected with described image acquisition device (7), described image acquisition device (7) is connected with described image processor (8), described image processor (8) is connected with described programmable logic controller (PLC) (2).
2. a kind of solar tracking controller based on looking daily motion track and image acquisition according to claim 1, it is characterized in that, described mechanically tracking device (6) uses the first tracking carrying out the sun depending on daily motion track, and described image acquisition device (7) is used for gathering the image of solar facula and the image of mechanically tracking device (6); Described image processor (8) is used for the image of the solar facula gathered according to image acquisition device (7) and the image of mechanically tracking device (6) and produces pixel coordinate; Described LCDs (1) is used for arranging tracking time, realizes round-the-clock, full automatic solar tracking.
3. a kind of solar tracking controller based on looking daily motion track and image acquisition according to claim 2, is characterized in that, described mechanically tracking device (6) is condenser.
4. adopting the method for solar tracking controller based on looking daily motion track and image acquisition according to claim 3, it is characterized in that, specifically comprise the steps:
SS1 primer fluid crystal display screen (1) is followed the tracks of, and arranges tracking stand-by time, carries out system initialization, uses the first tracking carrying out the sun depending on daily motion track;
SS2 has just followed the tracks of rear startup image trace pattern and has carried out accurate tracking, judge whether sun position completes, if complete, start image acquisition device (7), image acquisition device (7) gathers the location drawing picture of solar facula location drawing picture and condenser (6), otherwise proceeds sun position;
SS3 judges that solar facula is whether in the coordinate range of image acquisition device (7), if in coordinate range, then image acquisition device (7) is positioned, the location drawing that image acquisition device (7) gathers solar facula location drawing picture and condenser (6) is processed as input picture processor (8), obtain condenser (6), the pixel coordinate of solar facula in image processor (8), otherwise return described step SS2;
Pixel coordinate in described step SS3 is sent to programmable logic controller (2) by SS4 to carry out asking for deviation, produce the elevation angle of condenser (6) and the angle of position angle needs rotation, and convert the position signalling of elevation angle motor (5), azimuth motor (4) to, control the rotation distance of motor, if elevation angle motor (5), azimuth motor (4) run to position, carry out tracking stand-by time and judge, otherwise elevation angle motor (5), azimuth motor (4) remain in operation;
SS5 judges that whether follow the tracks of stand-by time arrives setting value, if tracking stand-by time arrives the tracking stand-by time that LCDs (1) sets, then follows the tracks of end, waits until that next day follows the tracks of again, otherwise returns described step SS2 continuation operation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108536178A (en) * | 2018-04-27 | 2018-09-14 | 南通欧贝黎新能源电力股份有限公司 | Wisdom solar cell electric power station system |
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