CN109508044A - A kind of heliostat secondary reflection orientation-correcting system and method - Google Patents
A kind of heliostat secondary reflection orientation-correcting system and method Download PDFInfo
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- CN109508044A CN109508044A CN201811531979.XA CN201811531979A CN109508044A CN 109508044 A CN109508044 A CN 109508044A CN 201811531979 A CN201811531979 A CN 201811531979A CN 109508044 A CN109508044 A CN 109508044A
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- heliostat
- image capturing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Image Processing (AREA)
Abstract
The present invention relates to a kind of heliostat secondary reflection orientation-correcting system and methods, including at least target, image capturing system and host computer, the target is mounted on the focal plane center of heat dump, target illumination range covering, twice reflects mirror disk, image capturing system is fixed on the mirror surface of heliostat, the reflecting surface of visual field direction and heliostat is in the same direction, the optical axis vector of image capturing system and the mirror normal vector of heliostat are parallel, the host computer connects all heliostat and image capturing system, for obtaining the data of image capturing system and the rotation of control heliostat.The present invention is that the target (higher source luminance or marker) for shooting heat dump focal plane by the image capturing system being mounted in heliostat minute surface carries out heliostat secondary reflection orientation-correcting, can satisfy all heliostats for having installed image capturing system in entire mirror field while being corrected.
Description
Technical field
The present invention relates to a kind of heliostat secondary reflection orientation-correcting system and methods, belong to heliostat secondary reflection direction
Alignment technique field.
Background technique
Secondary reflection type solar energy thermal-power-generating technology belongs to novel tower type solar generation technology, the secondary reflection type sun
The center energy thermal power station Jing Chang is mounted with a secondary reflection tower, and secondary reflection mirror disk is installed on tower.Heliostat is by sunlight
Spot reflexes to secondary reflection mirror disk, completes primary event, the suction for being mounted on Near Ground is reflexed to using secondary reflection mirror disk
Hot device completes secondary reflection, obtains the solar energy of higher energy density for generating electricity, so tower secondary reflection mirror disk is to influence
One of key factor of generating efficiency.Reflection in secondary reflection type solar energy thermal-power-generating station is mainly heliostat with optical device
With secondary reflection mirror disk, wherein heliostat belongs to movement mechanism, and the direction essence of low deviation can be obtained by other bearing calibrations
Degree and tracking accuracy, and secondary reflection mirror disk belongs to fixed mechanism, hardly changes after being installed.Due to secondary reflection mirror
Disk can generate deviation during installation so that practical posture from design posture it is different, reduction secondary reflection precision, may result in through
The sunlight for crossing secondary reflection can not be exposed to accurately in heat dump, to influence generating efficiency.Therefore, it is necessary to a kind of correction is fixed
The detection method that solar eyepiece secondary reflection is directed toward.
Since secondary reflection type solar energy thermal-power-generating technology belongs to new technique, the secondary reflection of heliostat is directed toward master at present
It to be corrected indirectly by measuring the practical posture of secondary reflection mirror disk.Since secondary reflection mirror disk is mounted on high-altitude, appearance
State information is mainly obtained by way of ranging, that is, passes through the range information and angle of each point on secondary reflection mirror disk to observation point
The real space posture of information fitting secondary reflection mirror disk.Survey when common distance measuring method for secondary reflection mirror disk mainly has winged
Away from method and binocular telemetry.Ranging is by the difference calculating observation point of laser pulse sending time and time of return to quilt when flying
The distance of measuring point.This method belongs to a measurement method, and the big secondary reflection mirror disk of measurement space scale needs to expend a large amount of work
When, and being not suitable for there is the secondary reflection mirror disk of high reflectance characteristic directly to be measured surface, need in secondary reflection
Mirror disk surface layout has the index point of diffusing characteristic diffuser.Binocular telemetry be based on binocular parallax principle, by it is same to
Alternate position spike of the measuring point in two image acquisition device visual fields calculates the relative tertiary location of the point.This method is based on Image Acquisition,
There can be the secondary reflection mirror disk of high reflectance characteristic directly to be measured to surface, but secondary reflection mirror disk distance is seen
The distance of measuring point farther out, causes measurement accuracy to reduce.Above two method belongs to indirect method, needs first to be fitted secondary reflection
The spatial attitude of mirror disk, the secondary reflection for resolving every heliostat further according to heliostat centre coordinate and heat dump centre coordinate refer to
To being readily incorporated new error in calculating process.
Summary of the invention
It is an object of the invention to: it is not able to satisfy existing needs for current technology, a kind of heliostat secondary counter is provided
Orientation-correcting system and method is penetrated, using light path principle, is clapped by the image capturing system being mounted in heliostat minute surface
Take the photograph the target being mounted at the center of heat dump focal plane, realize a kind of high-precision, high efficiency, can be parallel secondary reflection be directed toward
Correct system and method.
The technical scheme adopted by the invention is that: a kind of heliostat secondary reflection orientation-correcting system, include at least target,
Image capturing system and host computer, the target are mounted on the focal plane center of heat dump, target illumination range covering, twice
Mirror disk is reflected, image capturing system is fixed on the mirror surface of heliostat, and the reflecting surface of visual field direction and heliostat is in the same direction, and image is adopted
The optical axis vector of collecting system and the mirror normal vector of heliostat are parallel, and the host computer connects all heliostat and image
Acquisition system, for obtaining the data of image capturing system and the rotation of control heliostat.
In the present invention: the image capturing system includes imaging optical path and digital image sensor；The imaging
Optical path is lens or aperture.
In the present invention: the target is higher source luminance or marker；It include meter in the image capturing system
It calculates module and memory module, the calculating of image data is directly completed in image capturing system, then image capturing system will be counted
It calculates result and is sent to host computer.
In the present invention: computing module and memory module are not set in the image capturing system, image data directly passes
It send to host computer, then image data calculating is completed in host computer, is as a result stored in host computer.
A kind of heliostat secondary reflection orientation-correcting method, includes the following steps:
(1), heliostat has corrected pointing accuracy and tracking accuracy, known to heliostat motion model；
(2), secondary reflection orientation-correcting system is installed on heliostat, guarantees image capturing system visual field direction and settled date
Mirror reflecting surface is in the same direction, and image capturing system optical axis vector is parallel with heliostat minute surface normal vector；
(3), in heat dump focal plane center arrangement target, target is adjusted to meet the requirement of covering, twice reflection mirror disk；
(4), the corresponding relationship of image capturing system and heliostat is established in host computer；
(5), host computer is directed toward adjustment heliostat posture according to heliostat secondary reflection under error free state；
(6), after heliostat rotation, image capturing system shoots image；
(7), image calculation includes two kinds:
Mode 1: having computing module and memory module in image capturing system, the calculating of image data is directly adopted in image
It is completed in collecting system, then calculated result is sent to host computer by image capturing system；
Mode 2: not having computing module and memory module in image capturing system, image data is conveyed directly to host computer,
Then image data calculating is completed in host computer, is as a result stored in host computer；
(8), the deviation [Δ y Δ x] of target's center and picture centre, wherein Δ y table in being calculated in image coordinate system
Show row deviation (unit: pixel), Δ x indicates column deviation (unit: pixel)；
(9), two axis deviation angle of heliostat is calculated
P indicates Pixel size (unit: m) in formula, and f indicates image capturing system focal length；
(10), revised heliostat corner is obtained
(11), when two axis deviation angle of heliostat is greater than preset critical, step (6) step is repeated to step (10)；When fixed
When two axis deviation angle of solar eyepiece is less than or equal to preset critical, by two Shaft angle θ 'yWith θ 'xMotion model is substituted into, after being corrected
Heliostat secondary reflection be directed toward
N '=Mnum(θ′y,θ′x)
M in formulanum() indicates the heliostat motion model that number is num；
(12), the heliostat secondary reflection after saving correction in host computer is directed toward；
(13), it if there is more heliostats make secondary reflection orientation-correcting simultaneously, is held referring to step (1) to step (12)
Row.
Beneficial effects of the present invention:
1. the present invention is the mesh for shooting heat dump focal plane by the image capturing system being mounted in heliostat minute surface
It marks (higher source luminance or marker) and carries out heliostat secondary reflection orientation-correcting, can satisfy all in entire mirror field installed
The heliostat of image capturing system is corrected simultaneously；
2., can be by target (higher source luminance or the mark at heat dump focal plane center the present invention is based on light path principle
Will object) light of outgoing reflexes to entire Jing Chang by secondary reflection mirror disk, to the progress of the high reflectance characteristic of secondary reflection mirror disk
It makes full use of, does not need to carry out extra process to secondary reflection mirror disk；
3. the present invention is based on light path principle, by by target (higher source luminance or marker) in image capturing system
It is secondary when target is remoter away from heliostat as plane imaging is adjusted to as planar central, realizing the resolving that secondary reflection is directed toward
It is higher to reflect precision；
4. directly shooting the mesh for being mounted on heat dump center by image capturing system the present invention is based on light path principle
The secondary reflection that mark resolves heliostat is directed toward, and belongs to direct measurement process, do not need to the spatial attitude of secondary reflection mirror disk into
Row fitting, effectively optimization aligning step, provide correction accuracy.
Detailed description of the invention
Fig. 1 is system schematic of the invention；
Fig. 2 is detecting state schematic diagram of the invention.
In figure: 1. targets；2. image capturing system；3. host computer；4. heat dump；5. secondary reflection mirror disk；6. heliostat.
Specific embodiment
Present invention is further described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figs. 1-2, a kind of heliostat secondary reflection orientation-correcting system, include at least target 1 (higher source luminance or
Marker), image capturing system 2 and host computer 3, the target 1 is mounted on the focal plane center of heat dump 4, and target 1 is irradiated
Range covering, twice reflects mirror disk 5, and image capturing system 2 is fixed on the mirror surface of heliostat 6, visual field direction and heliostat 6
Reflecting surface is in the same direction, and the optical axis vector of image capturing system 2 and the mirror normal vector of heliostat 6 are parallel, and the host computer 3 connects
All heliostat 6 and image capturing system 2 are connect, for obtaining the data of image capturing system 2 and turning for control heliostat 6
It is dynamic.The image capturing system 2 includes imaging optical path and digital image sensor；The imaging optical path is lens or small
Hole.
In the present invention: including computing module and memory module, the calculating of image data in the image capturing system 2
It is directly completed in image capturing system 2, then calculated result is sent to host computer 3 by image capturing system 2.
In the present invention: not setting computing module and memory module in the image capturing system 2, image data directly passes
It send to host computer 3, then image data calculating is completed in host computer 3, is as a result stored in host computer 3.
A kind of heliostat secondary reflection orientation-correcting method, includes the following steps:
(1), heliostat has corrected pointing accuracy and tracking accuracy, known to heliostat motion model；
(2), secondary reflection orientation-correcting system is installed on heliostat, guarantees image capturing system visual field direction and settled date
Mirror reflecting surface is in the same direction, and image capturing system optical axis vector is parallel with heliostat minute surface normal vector；
(3), in heat dump focal plane center arrangement target, target is adjusted to meet the requirement of covering, twice reflection mirror disk；
(4), the corresponding relationship of image capturing system and heliostat is established in host computer；
(5), host computer is directed toward adjustment heliostat posture according to heliostat secondary reflection under error free state；
(6), after heliostat rotation, image capturing system shoots image；
(7), image calculation includes two kinds:
Mode 1: having computing module and memory module in image capturing system, the calculating of image data is directly adopted in image
It is completed in collecting system, then calculated result is sent to host computer by image capturing system；
Mode 2: not having computing module and memory module in image capturing system, image data is conveyed directly to host computer,
Then image data calculating is completed in host computer, is as a result stored in host computer；
(8), the deviation [Δ y Δ x] of target's center and picture centre, wherein Δ y table in being calculated in image coordinate system
Show row deviation (unit: pixel), Δ x indicates column deviation (unit: pixel)；
(9), two axis deviation angle of heliostat is calculated
P indicates Pixel size (unit: m) in formula, and f indicates image capturing system focal length；
(10), revised heliostat corner is obtained
(11), when two axis deviation angle of heliostat is greater than preset critical, step (6) step is repeated to step (10)；When fixed
When two axis deviation angle of solar eyepiece is less than or equal to preset critical, by two Shaft angle θ 'yWith θ 'xMotion model is substituted into, after being corrected
Heliostat secondary reflection be directed toward
N '=Mnum(θ′y,θ′x)
M in formulanum() indicates the heliostat motion model that number is num；
(12), the heliostat secondary reflection after saving correction in host computer is directed toward；
(13), it if there is more heliostats make secondary reflection orientation-correcting simultaneously, is held referring to step (1) to step (12)
Row.
Through the above technical solutions, the present invention shoots heat dump by the image capturing system being mounted in heliostat minute surface
The target (higher source luminance or marker) of focal plane carries out heliostat secondary reflection orientation-correcting, can satisfy entire Jing Chang
It interior all heliostats for having installed image capturing system while being corrected；And when telemetry belong to a measurement method；
The present invention is based on light path principles, can be by target (higher source luminance or the mark at heat dump focal plane center
Object) outgoing light entire Jing Chang is reflexed to by secondary reflection mirror disk, the high reflectance characteristic of secondary reflection mirror disk is filled
Divide and utilize, does not need to carry out extra process to secondary reflection mirror disk；And when telemetry pass through laser pulse and issue time and return
The difference calculating observation point of time is not suitable for the secondary reflection mirror disk for having high reflectance characteristic to surface to the distance of measured point
It is directly measured, needs to arrange the index point with diffusing characteristic diffuser in secondary reflection mirror panel surface；
The present invention is based on light path principle, by by target (higher source luminance or marker) in image capturing system picture
Plane imaging is adjusted to as planar central, realizes the resolving that secondary reflection is directed toward, when target is remoter away from heliostat, secondary counter
Ejaculation degree is higher；And when the binocular telemetry remote measured object of measurement, measurement accuracy can reduce；
The present invention is based on light path principles, and the target for being mounted on heat dump center is directly shot by image capturing system
The secondary reflection for resolving heliostat is directed toward, and belongs to direct measurement process, does not need to carry out the spatial attitude of secondary reflection mirror disk
Fitting, effectively optimization aligning step, provide correction accuracy；And when telemetry and binocular telemetry belong to indirect method, need
It is first fitted the spatial attitude of secondary reflection mirror disk, resolves every settled date further according to heliostat centre coordinate and heat dump centre coordinate
The secondary reflection of mirror is directed toward, and new error is readily incorporated in calculating process.
Above specific embodiments of the present invention have been described, but the present invention is not limited to above description.For this
For the technical staff in field, the equal modification and substitution of any pair of the technical program are all within the scope of the invention.Cause
This, made equal transformation and modification, all should be contained within the scope of the invention without departing from the spirit and scope of the invention.
Claims (5)
1. a kind of heliostat secondary reflection orientation-correcting system, it is characterised in that: include at least target (1), image capturing system
(2) and host computer (3), the target (1) are mounted on the focal plane center of heat dump (4), target (1) range of exposures covering two
Secondary reflection mirror disk (5), image capturing system (2) are fixed on the mirror surface of heliostat (6), and visual field direction is anti-with heliostat (6)
Penetrate that face is in the same direction, the optical axis vector of image capturing system (2) host computer parallel, described with the mirror normal vector of heliostat (6)
(3) all heliostat (6) and image capturing system (2) are connected, the data and control for obtaining image capturing system (2) are fixed
The rotation of solar eyepiece (6).
2. a kind of heliostat secondary reflection orientation-correcting system according to claim 1, it is characterised in that: the target
It (1) is higher source luminance or marker, the image capturing system (2) includes imaging optical path and digital image sensor；Institute
The imaging optical path stated is lens or aperture.
3. a kind of heliostat secondary reflection orientation-correcting system according to claim 2, it is characterised in that: the image
It include computing module and memory module in acquisition system (2), the calculating of image data is directly complete in image capturing system (2)
At then calculated result is sent to host computer (3) by image capturing system (2).
4. a kind of heliostat secondary reflection orientation-correcting system according to claim 2, it is characterised in that: the image
Computing module and memory module are not set in acquisition system (2), image data is conveyed directly to host computer (3), then image data
It calculates and is completed in host computer (3), be as a result stored in host computer (3).
5. a kind of heliostat secondary reflection orientation-correcting method, characterized by the following steps: (1), heliostat corrected
Pointing accuracy and tracking accuracy, known to heliostat motion model；
(2), secondary reflection orientation-correcting system is installed on heliostat, guarantees that image capturing system visual field direction and heliostat are anti-
It is in the same direction to penetrate face, image capturing system optical axis vector is parallel with heliostat minute surface normal vector；
(3), in heat dump focal plane center arrangement target, target is adjusted to meet the requirement of covering, twice reflection mirror disk；
(4), the corresponding relationship of image capturing system and heliostat is established in host computer；
(5), host computer is directed toward adjustment heliostat posture according to heliostat secondary reflection under error free state；
(6), after heliostat rotation, image capturing system shoots image；
(7), image calculation includes two kinds:
Mode 1: computing module and memory module are had in image capturing system, the calculating of image data is directly in Image Acquisition system
It is completed in system, then calculated result is sent to host computer by image capturing system；
Mode 2: not having computing module and memory module in image capturing system, image data is conveyed directly to host computer, then
Image data calculating is completed in host computer, is as a result stored in host computer；
(8), the deviation [Δ y Δ x] of target's center and picture centre in calculating in image coordinate system, wherein Δ y indicates row
Deviation (unit: pixel), Δ x indicate column deviation (unit: pixel)；
(9), two axis deviation angle of heliostat is calculated
P indicates Pixel size (unit: m) in formula, and f indicates image capturing system focal length；
(10), revised heliostat corner is obtained
(11), when two axis deviation angle of heliostat is greater than preset critical, step (6) step is repeated to step (10)；Work as heliostat
When two axis deviation angles are less than or equal to preset critical, by two Shaft angle θ 'yWith θ 'xMotion model is substituted into, is determined after being corrected
Solar eyepiece secondary reflection is directed toward
N '=Mnum(θ′y,θ′x)
M in formulanum() indicates the heliostat motion model that number is num；
(12), the heliostat secondary reflection after saving correction in host computer is directed toward；
(13), it if there is more heliostats make secondary reflection orientation-correcting simultaneously, is executed referring to step (1) to step (12).
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| CN201811531979.XA CN109508044B (en) | 2018-12-14 | 2018-12-14 | Heliostat secondary reflection pointing correction system and method |
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| CN201811531979.XA CN109508044B (en) | 2018-12-14 | 2018-12-14 | Heliostat secondary reflection pointing correction system and method |
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| CN109508044B CN109508044B (en) | 2022-03-29 |
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Cited By (3)
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| CN110173677A (en) * | 2019-04-23 | 2019-08-27 | 李渊 | A kind of secondary reflection solar boiler |
| CN110209205A (en) * | 2019-06-06 | 2019-09-06 | 浙江中控太阳能技术有限公司 | A kind of heliostat bearing calibration based on mirror surface label |
| CN112631339A (en) * | 2020-12-04 | 2021-04-09 | 江苏鑫晨光热技术有限公司 | System and method for correcting secondary reflection pointing of movable heliostat |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173677A (en) * | 2019-04-23 | 2019-08-27 | 李渊 | A kind of secondary reflection solar boiler |
| CN110209205A (en) * | 2019-06-06 | 2019-09-06 | 浙江中控太阳能技术有限公司 | A kind of heliostat bearing calibration based on mirror surface label |
| CN112631339A (en) * | 2020-12-04 | 2021-04-09 | 江苏鑫晨光热技术有限公司 | System and method for correcting secondary reflection pointing of movable heliostat |
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