CN102297678A - Fixed sensor based solar tracking positioner and method - Google Patents
Fixed sensor based solar tracking positioner and method Download PDFInfo
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- CN102297678A CN102297678A CN2011101345123A CN201110134512A CN102297678A CN 102297678 A CN102297678 A CN 102297678A CN 2011101345123 A CN2011101345123 A CN 2011101345123A CN 201110134512 A CN201110134512 A CN 201110134512A CN 102297678 A CN102297678 A CN 102297678A
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Abstract
The invention discloses a coordinate transformation based solar tracking positioner and a method. The positioner provided by the invention comprises a digital signal processing chip, a data acquisition device and a black box with a hole. In dependence on different solar angles, light travels through the small hole on the black box and a light spot is generated on different positions of an imaging surface; brightness information on the imaging surface is converted into digital information by the data acquisition device; the input signal is processed by the data processing chip to obtain a concrete coordinate of the light spot center; finally, the solar angle is calculated in dependence on the central point of the light spot and the mechanical size of the black box so as to obtain the solar position. According to the invention, the solar position information is acquired at real time to obtain the accurate solar position. The positioner provided by the invention has a concise system and high precision, is stable and reliable, has a strong anti-interference capability, and can be convenient to form a measurement network to collectively calibrate the solar position. The method provided by the invention is suitable for those systems which have high requirements on solar angle tracking precision and stability, especially suitable for the solar energy concentrating power system.
Description
Technical field
The present invention relates to field of locating technology, relate in particular to a kind of sun tracking positioning device and method based on light sensor.
Background technology
Under the background of present energy crisis and environmental crisis, sun power as a kind of abundant clean energy resource of originating, will become the main source of future source of energy.The sun power in NORTHWEST CHINA area is especially abundant, therefore, utilizes the resource of sun power not only can alleviate the problem of China's energy scarcity, can also make western part obtain exploitation.
Tradition adopts photovoltaic generation, but since its efficient and cost problem do not used on a large scale, and, because core system silicon technology has been improved the use cost of China more by the grasp of states such as Japan; Simultaneously, the accumulator that is used for store electrical energy can cause secondary pollution.Now, a kind ofly produce a large amount of heats by focused solar energy, be used for adding the method that hot steam's impulse turbine generates electricity and begin to come into operation in western countries, this method is generated electricity and can be able to be adopted and net mode directly imports electrical network, remove the link that stores from, also made things convenient for the secondary utilization.This method just is being applicable to that China western part carries out large-scale solar electrical energy generation.
The core of this electricity-generating method is how effectively to focus on the less sun power of energy flux density to a bit, makes that water vapor or hydrogen are heated rapidly.But because the influence of earth rotation and revolution, the sun changes in 1 year neutralization in a day with respect to the position in generating place, place, adopts the focusing surface of fixing will reduce capacity usage ratio greatly.The position that this just requires accurately to locate the sun effectively focuses on.
The method that obtains the accurate position of the sun now has two kinds, the one, the mode of employing clock tracing, the i.e. sun angle that sums up according to astronomical sight, determine the angle of focussing plane, but this method has just been utilized historical data as a reference, does not record the elevation angle of the sun in real time, therefore is easy to occur error, need constantly proofread and correct, this is unfavorable for promoting on a large scale and actual the use.And another kind of method is to adopt sensor to follow the tracks of.Mostly adopt light activated elements such as photoresistance, phototriode in the existing research, though these equipment costs are low, bearing accuracy is not high enough, and catabiosis takes place used electron device easily, and having cloudy day or the cloudy malfunctioning phenomenon of weather, performance is stable inadequately.And the employing that has camera sun angle is directly measured, this method draws final angle by the angle and the position of the sun on imaging surface of camera, but like this in machining and motion control, need to obtain higher accuracy requirement, and total algorithm is comparatively complicated, does not therefore put into practical application.The existing sensors tracking can't satisfy those tracking accuracies has relatively high expectations, and equipment performance requires more stable, the requirement of lower-cost solar energy concentration generating system.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of sun tracking positioning device and method based on coordinate transform is provided.
The objective of the invention is to be achieved through the following technical solutions: a kind of sun tracking positioning device based on coordinate transform, it comprises: digital signal processing chip, data collector and black box with holes etc.; Wherein, data collector links to each other with digital processing chip, and both are installed in the bottom of camera bellows with holes.
A kind of solar tracking localization method of using said apparatus may further comprise the steps:
(1) according to the difference of sun angle, light passes the aperture on the camera bellows, at the diverse location generation hot spot of imaging surface;
(2) data collector is converted into numerical information with the monochrome information on the imaging surface;
(3) data processing chip is handled the signal of input, draws the concrete coordinate of spot center;
(4), calculate the angle of the sun, thereby draw solar azimuth according to the mechanical dimension of spot center point and camera bellows.
The invention has the beneficial effects as follows: the present invention gathers the facula information of camera bellows bottom in real time, and the sunny angle of inverse does not need whole device to be in motion state.And mathematical derivation is comparatively simple, does not need expensive processor.And, the choosing of photo-sensitive cell also comparatively wide in range (as photodiode, triode or digital camera), precision depends on the density (independent light sensing device) or the pixel (digital camera) of photo-sensitive cell fully.
Description of drawings
Fig. 1 is system of the present invention and signal flow graph
Fig. 2 is the structured flowchart of specific embodiments of the invention;
Fig. 3 is a flow chart of steps of the present invention;
Fig. 4 is a solar space of the present invention angle synoptic diagram;
Fig. 5 is an imaging surface vertical view of the present invention;
Fig. 6 is a geometric representation of the present invention;
Among the figure, camera bellows 1, imaging surface 2, digital signal processing chip 3, digital camera 4, aperture 5, hot spot 6.
Embodiment
Describe the present invention below with reference to the accompanying drawings in detail, it is more obvious that purpose of the present invention and effect will become.
The sun tracking positioning device that the present invention is based on coordinate transform comprises: digital signal processing chip, data collector and black box with holes; Data collector links to each other with digital processing chip, and both are installed in the bottom of camera bellows with holes.
Digital signal processing chip receives the data that data collector is gathered, and handles, thereby draws sun angle.Data collector comprises photo-sensitive cell and data converter, draws its particular location according to the hot spot on the black box imaging surface; The translucent film of one deck has been installed in the centre of black box with holes, with the imaging surface of doing the sun.
Wherein, photo-sensitive cell can use independently photosensitive device, as photoresistance, photodiode etc., perhaps uses integrated photo-sensitive cell, and as CCD and CMOS camera, the typical devices pattern as shown in Figure 2.
A kind of as shown in Figure 3 solar tracking localization method of using above-mentioned based on device may further comprise the steps:
Step 1: according to the difference of sun angle, light passes the aperture on the camera bellows, at the diverse location generation hot spot of imaging surface.
As shown in Figure 4, the angle of the sun can be with the i.e. angle of projection and x axle in the plane in two position angles of the sun in world coordinate system
And the elevation angle on ray and ground
Represent.As Fig. 2, for a given sun angle, sunshine can stay the next hot spot of determining on the imaging surface of camera bellows after passing aperture.And there is a relation one to one the position of the position of this hot spot and the sun, therefore can be by determining that facula position gets sunny angle.
Step 2: data collector is converted into numerical information with the monochrome information on the imaging surface.
As shown in Figure 5, imaging surface is divided into a * b unit square, each square can be expressed as all that (wherein x represents this square position in the horizontal for x, coordinate y), and y represents its position in the vertical.Therefore (x y) represents the position of spot center point on imaging surface can to use coordinate.Data collector detects the monochrome information (gray-scale value) in each square, and with this information uploading to digital processing chip.
Step 3: data processing chip is handled the signal of input, draws the concrete coordinate of spot center.
Data processing chip deposits monochrome information in the matrix of an a * b in, uses L
X, yRepresent the monochrome information in each square, as follows:
Utilize the edge detection method, judge L
X, yAnd L
X, y+1Between difference (being luminance difference) whether greater than a given threshold value, judge whether it is the edge of hot spot.Thereby draw a series of frontier point (x
1, y
1) (x
2, y
2) ... (x
n, y
n).Then all frontier points are averaged and to get spot center point position (X
c, Y
c).Formula is as follows:
Step 4: according to the mechanical dimension of spot center point and camera bellows, calculate the angle of the sun, thereby draw solar azimuth.
As shown in Figure 6, establish the spot center point at (X
c, Y
c) locate, aperture is H to the distance of imaging surface in the camera bellows
1, can derive the i.e. angle of projection and x axle in the plane in two orientation of the sun in world coordinate system by mathematical method
And the elevation angle on ray and ground
:
Camera used in the present invention and digital signal processing chip are not construed as limiting the present invention; every employing light activated element is gathered the plug-in control system that is realized that speck position and intelligent processor handle with computing and is all fallen into protection scope of the present invention.
The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (2)
1. the sun tracking positioning device based on coordinate transform is characterized in that it comprises: digital signal processing chip, data collector and black box with holes etc.; Wherein, data collector links to each other with digital processing chip, and both are installed in the bottom of camera bellows with holes.
2. a solar tracking localization method of using said apparatus is characterized in that, may further comprise the steps:
(1) according to the difference of sun angle, light passes the aperture on the camera bellows, at the diverse location generation hot spot of imaging surface;
(2) data collector is converted into numerical information with the monochrome information on the imaging surface;
(3) data processing chip is handled the signal of input, draws the concrete coordinate of spot center;
(4), calculate the angle of the sun, thereby draw solar azimuth according to the mechanical dimension of spot center point and camera bellows.
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| CN2011101345123A CN102297678A (en) | 2011-05-24 | 2011-05-24 | Fixed sensor based solar tracking positioner and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818509A (en) * | 2012-08-09 | 2012-12-12 | 嘉兴优太太阳能有限公司 | High-precision square annular measuring device for accuracy degree of photovoltaic tracking system |
| CN102829702A (en) * | 2012-08-09 | 2012-12-19 | 嘉兴优太太阳能有限公司 | Ring type measurement device for accuracy of photovoltaic tracking system |
| CN103744437A (en) * | 2014-01-06 | 2014-04-23 | 南京工程学院 | Tracking method for automatic solar tracking system |
| CN103840757A (en) * | 2014-03-26 | 2014-06-04 | 电子科技大学 | Solar tracking method and device for photovoltaic power generation equipment |
| CN104977942A (en) * | 2015-07-02 | 2015-10-14 | 太原科技大学 | Sun location detection apparatus and detection method |
| CN106454022A (en) * | 2016-08-30 | 2017-02-22 | 中航动力股份有限公司 | Solar azimuth sensor based on imaging data analysis, and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102052913A (en) * | 2010-10-26 | 2011-05-11 | 浙江大学 | Small hole imaging principle-based projector for measuring sun position information |
| CN202158849U (en) * | 2011-05-24 | 2012-03-07 | 浙江大学 | Solar tracking locating device based on fixed sensor |
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2011
- 2011-05-24 CN CN2011101345123A patent/CN102297678A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052913A (en) * | 2010-10-26 | 2011-05-11 | 浙江大学 | Small hole imaging principle-based projector for measuring sun position information |
| CN202158849U (en) * | 2011-05-24 | 2012-03-07 | 浙江大学 | Solar tracking locating device based on fixed sensor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818509A (en) * | 2012-08-09 | 2012-12-12 | 嘉兴优太太阳能有限公司 | High-precision square annular measuring device for accuracy degree of photovoltaic tracking system |
| CN102829702A (en) * | 2012-08-09 | 2012-12-19 | 嘉兴优太太阳能有限公司 | Ring type measurement device for accuracy of photovoltaic tracking system |
| CN102818509B (en) * | 2012-08-09 | 2015-12-02 | 嘉兴优太太阳能有限公司 | High-precision photovoltaic tracking system accuracy square ring type measurement mechanism |
| CN103744437A (en) * | 2014-01-06 | 2014-04-23 | 南京工程学院 | Tracking method for automatic solar tracking system |
| CN103744437B (en) * | 2014-01-06 | 2016-08-17 | 南京工程学院 | The tracking of solar automatic tracking system |
| CN103840757A (en) * | 2014-03-26 | 2014-06-04 | 电子科技大学 | Solar tracking method and device for photovoltaic power generation equipment |
| CN103840757B (en) * | 2014-03-26 | 2016-03-23 | 电子科技大学 | For sun tracing method and the device of photovoltaic power generation equipment |
| CN104977942A (en) * | 2015-07-02 | 2015-10-14 | 太原科技大学 | Sun location detection apparatus and detection method |
| CN106454022A (en) * | 2016-08-30 | 2017-02-22 | 中航动力股份有限公司 | Solar azimuth sensor based on imaging data analysis, and control method |
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