CN108572665A - Settled date tracing system based on sensing technology - Google Patents
Settled date tracing system based on sensing technology Download PDFInfo
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- CN108572665A CN108572665A CN201710144951.XA CN201710144951A CN108572665A CN 108572665 A CN108572665 A CN 108572665A CN 201710144951 A CN201710144951 A CN 201710144951A CN 108572665 A CN108572665 A CN 108572665A
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- heliostat
- light
- minute surface
- tracking
- sensor
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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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Position Or Direction (AREA)
Abstract
The present invention is a kind of heliostat tracking control system and heliostat tracking, and heliostat uses cross-compound arrangement, including heliostat and sensor.Sensor is for detecting reflection light, when center sensor point and minute surface central point and heat collector central point are on a straight line, light is along straightline propagation, as long as this 3 location determinations, the position of the light path of reflected light is determined, to effectively reflex to light beam on heat collector.When night or rainy days are without sunlight, minute surface is then automatically modified in horizontal direction, and minute surface is effectively prevent to be caused equipment damage by wind resistance.The present invention greatly reduces cost, while overcoming huge rectification work amount and ineffective problem that traditional tracking mode needs.
Description
Technical field
The present invention relates to photo-thermal power generation field, precise positioning sun optical position is not necessarily to manual correction data, automatically resets
The settled date tracing equipment of function.
Background technology
Heliostat is the beam condensing unit of tower-type solar thermal power generating system, and the front end energy for administering entire tower power station supplies
It gives, Two axle drive, heliostat is generally used by sun light reflection and to gather at fixed target in real time.
There are mainly two types of the Two axle drive modes of heliostat, respectively orientation-pitching heliostat and spin-pitching settled date
Mirror.Conventional orientation-pitching heliostat is calculated indirectly by motor pulses or encoder pulse combination initial position angle
Go out double real-time inclination angles of pitching heliostat minute surface, its shortcoming is that precision is not high while powering off afterpulse loss, needs to reset again
Inclination angle is calculated, the time is expended.Good optical quality may be implemented in conventional spin pitching heliostat, its shortcoming is that spin axis
Slight machine error will bring relatively large tracking error.
Current heliostat tracing control mostly uses opened loop control scheme, i.e. Local Controller or upper-level control system passes through
Local time, calculation of longitude ＆ latitude go out the position of sun of there and then, true by the relative position between heliostat and projection target
The tracking target angle for making heliostat, the current angular of heliostat is got by motor pulses or motor encoder, in turn
Compare the difference between heliostat current angular and target angle, send out motor drive signal, motor driver receives motor and drives
Dynamic signal, driving motor, speed reducer rotate to target angle, complete tracking process.
The open-loop tracking mode of heliostat has its inherent limitation, main tracking error source to calculate and miss essentially from position of sun
Difference, column tilt, and twin shaft is nonopiate to wait accumulation machine error, encoder (pulse) reference bit error and speed reducer error.Wherein
Up to 0.003 degree, enough heliostat tracking use the precision that current position of sun calculates.Column tilts, speed reducer error
It with operating mode, changes over time, is the main error source of heliostat open-loop tracking, effectively eliminating for the above error source is also always fixed
Solar eyepiece tracks the problem in field.
United States Patent (USP) 4440150 is the opened loop control scheme more than using, and such open loop control mode is also exhausted now
Most of tower power stations use.The limitation of such control program precision level is the minute surface physical location of its heliostat by stepping
The number of pulses of motor is got indirectly, and since heliostat pillar tilts, speed reducer error etc. accumulates machine error, encoder (arteries and veins
Punching) reference bit error and speed reducer error presence, can not really reflect the actual angle of inclination of heliostat minute surface.It is such
The limitation of control program cost grounds is the secondhand mode of mirror position, to ensure precision performance, to motor performance,
Speed reducer performance and heliostat support construction intensity propose high requirement.
Heliostat tracking error antidote in Chinese patent 101776919A is adopted for United States Patent (USP) 4440150
Error source in heliostat opened loop control scheme and design, preferable tracking effect can be reached.Its method for correcting error is to pass through
To heliostat tracking error, day, detection secondary more than a day obtain the tracing deviation angle at heliostat multiple moment, pass through more than a year
Heliostat daily tracing deviation curve in every face is found to the analysis of these tracing deviation angle-datas and curve matching, by deviation
The initial angle for feeding back to heliostat, be heliostat hot spot can more prepare get to target location.Its method for correcting error lacks
It falls into and is also evident from, the guarantee of heliostat tracking accuracy depends on the acquisition of a large amount of correction databases, since deviation-rectifying system is each
The correction data at that time of a face heliostat, commercialized heliostat field heliostat substantial amounts, such correction can only be obtained by starting
Mode will influence construction speed, while occupy a large amount of working time.
The core of heliostat tracking control system is the design of transmission system, and the high of transmission system cost is fixed
The huge obstacle that solar eyepiece commercialization is promoted, existing transmission scheme are mostly the shape of stepper motor or servo motor cooperation speed reducer
Formula, since heliostat real time position needs to be determined by motor side, in order to ensure heliostat real time position estimation precision, whole system
Performance requirement it is high, also bring high cost pressure, while the heliostat real time position precision that such mode is calculated is relatively low,
The extremely difficult guarantee of tracking accuracy due to accumulating machine error especially after longtime running.
【Invention content】
The purpose of the present invention is overcome the high band of motor and speed reducer performance requirement in existing heliostat tracking control system
The defect that high cost disadvantage and the control method tracking accuracy after longtime running come are difficult to ensure, provides a set of low cost,
High-precision heliostat tracking control system and heliostat tracking.
The present invention is a kind of heliostat tracking control system and heliostat tracking, and heliostat uses cross-compound arrangement, packet
Containing heliostat and sensor.Sensor is for detecting reflection light, when in center sensor point and minute surface central point and heat collector
For the heart o'clock when on a straight line, light is along straightline propagation, as long as this 3 location determinations, the position of the light path of reflected light is true
It is fixed, to which effectively light beam be reflexed on heat collector.When night or rainy days are without sunlight, minute surface be then automatically modified in
Horizontal direction effectively prevent minute surface to be caused equipment damage by wind resistance.The present invention greatly reduces cost, while overcoming biography
The huge and ineffective problem of rectification work amount that tracking mode of uniting needs.
Sensor is made of four groups of photo resistance, and light enters sensor by light entrance, when light is perpendicular to entrance
The photo resistance of four direction is in not by light state, when light shifts, then offsets to photo resistance, i.e., can be by light
According to and resistance value changes, change value feeds back to controller by circuit, and driving motor is adjusted mirror angle by controller, makes incidence
Deviate photo resistance, when incident light is again perpendicular to light entrance, controller stops driving, and (reflected light carries out primary at this time
Correction, light still return back to and preset path) therefore no matter how sunray changes, as long as photo resistance numerical value differs
Sample driver will drive minute surface to be adjusted to initial optical path, and then reflected light is made to concentrate on heat collector always.
Fig. 1 is principle of the invention figure.
Fig. 2 is sensor map.
Claims (1)
1. a kind of automatically correcting settled date tracing system based on cellular type sensor, including automatic modified control system, with
And the sensor of small structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710144951.XA CN108572665A (en) | 2017-03-13 | 2017-03-13 | Settled date tracing system based on sensing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710144951.XA CN108572665A (en) | 2017-03-13 | 2017-03-13 | Settled date tracing system based on sensing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108572665A true CN108572665A (en) | 2018-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201710144951.XA Pending CN108572665A (en) | 2017-03-13 | 2017-03-13 | Settled date tracing system based on sensing technology |
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Citations (11)
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|---|---|---|---|---|
| CN1687669A (en) * | 2005-04-27 | 2005-10-26 | 张耀明 | Heliostat device |
| CN101236287A (en) * | 2008-02-26 | 2008-08-06 | 苏建国 | Heliostat device |
| CN201207625Y (en) * | 2008-05-23 | 2009-03-11 | 华北电力大学 | Photovoltaic electricity generating device having sun tracing function |
| CN201499107U (en) * | 2009-09-11 | 2010-06-02 | 王泽秀 | Sunlight autotracking and positioning device |
| US20100243031A1 (en) * | 2007-10-31 | 2010-09-30 | Kazuaki Ezawa | Solar light tracking sensor direction setting/measuring/re-adjusting method and solar light collecting device |
| CN102968130A (en) * | 2012-11-22 | 2013-03-13 | 宁夏光合能源科技有限公司 | Opened/closed-loop control heliostat with real-time reflected light spot position adjusting function |
| CN103412577A (en) * | 2013-06-03 | 2013-11-27 | 梁方民 | Heliostat sunlight tracking sensor control method and device thereof |
| CN103744437A (en) * | 2014-01-06 | 2014-04-23 | 南京工程学院 | Tracking method for automatic solar tracking system |
| CN104391511A (en) * | 2014-11-21 | 2015-03-04 | 广西智通节能环保科技有限公司 | Solar tracking sensor and mounting method thereof |
| CN204879906U (en) * | 2015-08-05 | 2015-12-16 | 皖西学院 | Solar energy is from dispelling heat LED street lamp with following function |
| CN105871321A (en) * | 2016-06-02 | 2016-08-17 | 太原工业学院 | Portable solar power supply equipment capable of being adjusted by tracking sun automatically |
-
2017
- 2017-03-13 CN CN201710144951.XA patent/CN108572665A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687669A (en) * | 2005-04-27 | 2005-10-26 | 张耀明 | Heliostat device |
| US20100243031A1 (en) * | 2007-10-31 | 2010-09-30 | Kazuaki Ezawa | Solar light tracking sensor direction setting/measuring/re-adjusting method and solar light collecting device |
| CN101236287A (en) * | 2008-02-26 | 2008-08-06 | 苏建国 | Heliostat device |
| CN201207625Y (en) * | 2008-05-23 | 2009-03-11 | 华北电力大学 | Photovoltaic electricity generating device having sun tracing function |
| CN201499107U (en) * | 2009-09-11 | 2010-06-02 | 王泽秀 | Sunlight autotracking and positioning device |
| CN102968130A (en) * | 2012-11-22 | 2013-03-13 | 宁夏光合能源科技有限公司 | Opened/closed-loop control heliostat with real-time reflected light spot position adjusting function |
| CN103412577A (en) * | 2013-06-03 | 2013-11-27 | 梁方民 | Heliostat sunlight tracking sensor control method and device thereof |
| CN103744437A (en) * | 2014-01-06 | 2014-04-23 | 南京工程学院 | Tracking method for automatic solar tracking system |
| CN104391511A (en) * | 2014-11-21 | 2015-03-04 | 广西智通节能环保科技有限公司 | Solar tracking sensor and mounting method thereof |
| CN204879906U (en) * | 2015-08-05 | 2015-12-16 | 皖西学院 | Solar energy is from dispelling heat LED street lamp with following function |
| CN105871321A (en) * | 2016-06-02 | 2016-08-17 | 太原工业学院 | Portable solar power supply equipment capable of being adjusted by tracking sun automatically |
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| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190124 Address after: Room 611-62, R&D Center Building, China (Hefei) International Intelligent Voice Industry Park, 3333 Xiyou Road, Hefei High-tech Zone, 230000, Anhui Province Applicant after: Anhui Yanda Intelligent Technology Co., Ltd. Address before: 230000 Room 1801, Building C3, Times Square, Binhu New District, Hefei City, Anhui Province Applicant before: Guo Yanda |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180925 |
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| RJ01 | Rejection of invention patent application after publication |