CN103063615B - Roughness measuring instrument based on parabolic reflector, and measuring method thereof - Google Patents
Roughness measuring instrument based on parabolic reflector, and measuring method thereof Download PDFInfo
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- CN103063615B CN103063615B CN201210582872.4A CN201210582872A CN103063615B CN 103063615 B CN103063615 B CN 103063615B CN 201210582872 A CN201210582872 A CN 201210582872A CN 103063615 B CN103063615 B CN 103063615B
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Abstract
The invention discloses a roughness measuring instrument based on a parabolic reflector, and solves the defects of no special instrument for detecting the parabolic reflector to detect mirror surface situations of the parabolic reflector in time and effectively in a conventional technology of cleaning the parabolic reflector regularly and timely. Time in the prior art solution, regular cleaning parabolic reflector and for detecting no professional equipment parabolic reflector parabolic reflector mirror situation timely and effective detection of defects. The roughness measurement instrument comprises a rotating mechanism for installing the parabolic reflector and driving the parabolic reflector to track sunlight, a detection mechanism which follows the rotating mechanism and is used for recording radiation intensity reflected by the parabolic reflector and the radiation intensity of the sunlight, and a control system for treating and controlling the rotating mechanism and the detection mechanism, wherein the detection mechanism comprises two horizontally arranged radiometers with opposite radiation receiving surfaces. The invention also discloses a measuring method of the roughness measuring instrument based on the instrument. The roughness measuring instrument fills a blank of no special roughness measuring instrument for groove parabolic reflector in the prior art, and the roughness measuring instrument has very high practical applicability and creativity, so that the roughness measuring instrument is very suitable for popularization and application.
Description
Technical field
What the present invention relates to is trough type solar power generation field, specifically, is a kind of Finish measurement instrument in order to detect parabolic mirror minute surface pollution condition.
Background technology
Along with the continuous quickening of China's process of industrialization, energy resource consumption and electricity needs also present the trend increased fast.The electric structure of China based on coal not only consumes the non-renewable resources such as coal sharp, but also causes environment and have a strong impact on, to such an extent as to China is faced with the severe challenge of energy resources and environment two aspect.Greatly develop too can, the renewable green such as wind energy and biomass energy, clean energy resource effectively compared with the consumption of low-resource and the energy, can safeguard environment.
At present, high-temperature solar generating has had large-scale commercial application experience for many years, wherein ripe with groove type solar electricity generation system.Groove type solar parabolic collector is the vitals in solar parabolic through power generation system, and the collecting efficiency of heat collector directly affects the generating efficiency of power plant, its primarily of parabolic mirror, solar receiver and support three part formed.And the optically focused effect of parabolic mirror is trough type solar heat-collector important technology index.Sun power heat build-up light field is placed in open air, and operating mode is comparatively severe, is therefore easy to the impact being subject to environmental factor; In the long-term course of work, the minute surface of parabolic mirror can be subject to dust and other pollutant effects and its light gathering efficiency is reduced, and then cause whole system efficiency to decline, in order to ensure the efficient work of heat collector, need regularly to carry out minute surface cleaning to parabolic mirror.
In prior art, minute surface cleaning for parabolic mirror adopts the mode of periodic cleaning usually, this mode can not determine scavenging period according to the actual pollution condition of parabolic mirror minute surface, it is difficult to the cleanliness of good maintenance parabolic mirror minute surface, lack certain science, and there is no corresponding parabolic mirror minute surface pollution detection device on the market.
Summary of the invention
To the object of the invention is to overcome in prior art the defect of parabolic mirror minute surface pollution condition in solar parabolic through power generation system not being carried out to the equipment detected in time, provide a kind of structure simple, realize convenient, detect in time, the scientific and effective Finish measurement instrument of testing result.
To achieve these goals, the technical solution used in the present invention is as follows:
Based on the Finish measurement instrument of parabolic mirror, this Finish measurement instrument comprises installing parabolic mirror and drives it to follow the tracks of the rotating mechanism of sunshine, follow rotating mechanism motion and in order to the testing agency of the radiation intensity that records parabolic mirror reflects and solar radiation intensity, and in order to control the control system of rotating mechanism and testing agency.
This Finish measurement instrument also comprises the PLC providing angle of incidence of sunlight degree.
Further, described testing agency comprises the horizontal radiation gauge of two of being connected with described rotating mechanism by fixed frame, and the radiation receiving surface of the two is contrary.
Further, described rotating mechanism comprises rotation axis, and the actuating unit in order to drive rotation axis to rotate; Described fixed frame is then installed on the rotating shaft.
Usually, described actuating unit comprises the servomotor being arranged on rotation axis one end, and the speed reduction unit be connected with servomotor; Described servomotor, speed reduction unit and rotation axis are connected successively and three is coaxial.
In order to better realize the present invention, be also provided with scrambler at the other end of described rotation axis.
Meanwhile, described fixed frame is also provided with the obliquity sensor gathering fixed frame degree of rotation.
The conveniently installation of parabolic mirror, described fixed frame one end and rotation axis are fastenedly connected, described radiation gauge is then arranged on the other end relative with rotation axis, and radiation gauge one of them be positioned at the framework of fixed frame, it is outer and be arranged on the side of fixed frame that another radiation gauge is then positioned at the framework of fixed frame.
Further, this Finish measurement instrument also comprises the fixed mechanism installing rotating mechanism, and this fixed mechanism comprises the control box housing in order to apparatus control system, and is arranged on the mounting bracket on this control box housing; Described rotation axis is then arranged on this mounting bracket and is also flexibly connected with it.
Based on the measuring method of the Finish measurement instrument of parabolic mirror, comprise the following steps:
(1) parabolic mirror is installed on the rotating shaft;
(2) PLC provides angle of incidence of sunlight degree information to control system;
(3) control system controls rotation axis by servomotor, speed reduction unit, makes it drive radiation gauge and parabolic mirror to follow the tracks of sunshine;
(4) information of scrambler and obliquity sensor feedback fixed frame rotational angle is to control system, and judge that whether fixed frame rotational angle is correct by control system, no, then relevant manipulation is carried out to rotation axis, till fixed frame rotational angle meets tracking operation;
The radiation information received separately is fed back to control system by (5) two radiation gauges;
(6) control system carries out relevant comparative's calculating, and judges that parabolic mirror is the need of clean, is, then send clean warning.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the present invention adopts two horizontal radiation gauges, fixedly mount parabolic mirror to be detected on the rotating shaft, the radiation receiving surface of one of them radiation gauge is just to parabolic mirror, and the radiation receiving surface of another radiation gauge is just to sunshine, radiation gauge and parabolic mirror all keep geo-stationary, because the incident angle of sunshine changes, two radiation gauges and parabolic mirror drive transmission by rotation axis, thus sunshine is followed the tracks of, by the radiation intensity contrast that two radiation gauges record, mirror surface cleaning degree or the dustiness of parabolic mirror can be drawn, by the mirror surface cleaning degree of parabolic mirror or dustiness, this is difficult to pinpoint technical indicator and is converted into the ability of catoptron reflected sunlight radiation and the actual contrast receiving solar radiation this device, numeral is adopted to carry out relative recording, the surface conditions of parabolic mirror is by generally becoming directly perceived, testing result science, effectively, by ability and the actual correlative value receiving solar radiation of the radiation of catoptron reflected sunlight, can judge that parabolic mirror is the need of clean, thus parabolic mirror minute surface is cleaned timely, it is made to remain best duty, completely avoid timing, the drawback of periodic cleaning,
(2) the present invention is also provided with high precision dip sensor on fixed frame, the rotational angle of fixed frame is fed back to control system by it, whether the angle being calculated fixed frame rotation by control system is suitable, correctly, and then judge that whether the rotational angle of radiation gauge and parabolic mirror is correct, and be also provided with scrambler on the rotating shaft simultaneously, this scrambler feeds back to control system in order to the rotational displacement of rotation axis is converted into electric signal, calculated by control system again, judge, radiation gauge and parabolic mirror whether consistent with the incident angle of sunshine, obliquity sensor combines with both scramblers and uses, effectively ensure that the rotation degree of accuracy of equipment, thus ensure that the degree of accuracy of equipment Inspection, improve the practical value of Finish measurement instrument,
(3) in the present invention, the radiation receiving surface of two radiation gauges is contrary, one of them is positioned at the framework of fixed frame also just to parabolic mirror, another radiation gauge is then just to sunshine, and it is positioned at outside the framework of fixed frame, parabolic mirror is then according in fixed frame, Each performs its own functions for two radiation gauges, effectively avoids receiving the radiation of catoptron reflection and the defect of solar radiation simultaneously, further increases the measuring accuracy of this measuring instrument;
(4) after the corresponding component in the present invention in fixed mechanism all adopts section bar to weld, plastic-blasting forms, and after fixed frame then adopts quality steel plate to weld, finishing is zinc-plated again completes, and ensure that this measuring instrument running precision in the course of the work;
(5) the present invention is also provided with travel switch on fixed frame, in order to limit the rotational angle of fixed frame, and soft spacing based on scrambler, avoid travel switch fault and cause accident, thus ensure that the normal operation of equipment;
(6) structure of the present invention is simple, compact, and realizes very convenient, for it promotes the use on a large scale, has established solid foundation;
(7) the present invention has filled up in prior art the blank of the groove type parabolic mirror Finish measurement equipment not having specialty, not only there is novelty, and there is very high practicality and creativeness, on the other hand, based on the powerful development trend of cleaning new energy, this equipment has wide market outlook and huge economic benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In above-mentioned accompanying drawing, the name that Reference numeral is corresponding is called: 1-fixed frame, 2-radiation gauge, 3-rotation axis, 4-servomotor, 5-speed reduction unit, 6-scrambler, 7-control box housing, 8-mounting bracket, 9-parabolic mirror.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
Based on the Finish measurement instrument of parabolic mirror, this measuring instrument is for the defect of surface conditions pick-up unit of parabolic mirror not having specialty in prior art, using two radiation gauges 2 as the core of this device, by the contrast radiation intensity of parabolic mirror reflects and the actual emanations intensity of sunshine, judge mirror surface cleaning situation or the pollution condition of parabolic mirror, thus determine the scavenging period of parabolic mirror minute surface.Be described with the principle of work of a kind of simple mathematical model to measuring instrument in the present embodiment: when minute surface cleans completely, if i is just to the radiation gauge of parabolic mirror and just to the ratio of the radiation gauge of sunshine, when minute surface hides by dust (mirror surface cleaning is influenced), if i
0for just to the radiation gauge of parabolic mirror with just to the ratio of the radiation gauge of sunshine, by i and i
0compare, draw formula: △=i
0/ i; Then according to setting reference value (as: 0.7), be reference when △ is less than or equal to this numerical value of 0.7(, can revise) time, system starts to hide to report to the police to dust to require to clean, it has reflected the surface conditions of parabolic mirror in time, and staff carries out the operation of being correlated with according to testing result, overcomes the drawback of timing, periodic cleaning in prior art.
As shown in Figure 1, in the present embodiment, Finish measurement instrument forms primarily of three parts, its respectively: the testing agency comprising two radiation gauges 2, in order to the rotating mechanism driving testing agency to follow the tracks of the sun, and control, process the control system of above-mentioned Liang Ge mechanism.Wherein, parabolic mirror 9 to be detected is arranged on rotating mechanism, itself and two radiation gauges 2 keep geo-stationary, and the radiation receiving surface of one of them radiation gauge 2 is just to parabolic mirror, with guarantee parabolic mirror 9 gather that solar energy is comprehensive must be received by radiation gauge 2.
Specifically, in the present embodiment, rotating mechanism adopts rotation axis 3, and carries out Electronic control, in order to simplify structure by servomotor 4, speed reduction unit 5 pairs of rotation axiss 3, servomotor 4, speed reduction unit 5 are coaxial with rotation axis 3 three, and its control procedure is then by control system process.The device driving radiation gauge 2 and parabolic mirror to rotate also can realize the object that institute in the present embodiment adopts rotation axis 3 structure drive radiation gauge 2 and parabolic mirror rotation, such as: with a fixed axis or not fixed axis for rotating shaft, and realize the device of locus conversion within the specific limits, as rolling disc, swivel becket etc., in view of the diversity of equipment, such device is difficult to exhaustive.The present embodiment adopts rotation axis 3 as the critical piece of rotating mechanism, is be a kind of preferred version.
In the present embodiment, two radiation gauges 2 are all fastenedly connected by a fixed frame 1 and rotation axis 3, and keep geo-stationary, and two radiation gauges 2 are horizontal; Described fixed frame 1 can adopt the framework of triangle-frame, rectangular frame or other shape changeables, and after it adopts quality steel plate to weld, finishing is zinc-plated again completes, and ensure that this measuring instrument running precision in the course of the work.The version of fixed frame 1 under the prerequisite not affecting radiation gauge received radiation, and can ensure that radiation gauge 2 follows the version of rotation axis 3 motion; Parabolic mirror 9 is positioned at fixed frame 1, as a kind of preferred version of mounting means, in order to ensure that two radiation gauges 2 all effectively, accurately can record radiation intensity, the radiation gauge 2 being wherein right against parabolic mirror 9 is positioned at fixed frame 1, it is outside that another radiation gauge 2 in order to record solar light radiation intensity is then positioned at fixed frame 1, is arranged on the side of fixed frame 1.It should be noted that, this kind of connected mode and version are all preferred versions, the installation site of above-mentioned fixed frame 1 and parabolic mirror all suitably can be improved not affecting under the prerequisite that this measuring instrument normally works, as: a fixed mount or line is respectively drawn at the two ends of parabolic mirror, one of them radiation gauge 2 is fixed on the caustic surface of parabolic mirror, can be many as far as possible or accept the radiation that parabolic mirror reflects completely, another radiation gauge 2 is then fixed on rotation axis 3 by support, or by relative with parabolic mirror for another radiation gauge fixing under the prerequisite not affecting radiation gauge record degree of accuracy, the two is made to keep geo-stationary, and make radiation gauge can follow parabolic mirror motion.But the principle that said structure changes is that two radiation gauges 2 must be on same straight line, and horizontally.
In order to better realize the present invention, ensure the accuracy of detection of measuring instrument, fixed frame 1 is also provided with obliquity sensor, the rotational angle of fixed frame 1 is fed back to control system by this obliquity sensor, whether the angle of then being rotated by control system judgment device is correct, to guarantee facing to the radiation gauge 2 of sunshine and parabolic mirror 9 all the time just to sunshine.On this basis, the present embodiment is also provided with a scrambler 6 in one end of rotation axis 3, in order to improve the rotation precision of fixed frame 1 further, thus improves the accuracy of detection of whole equipment; On the other hand, scrambler combines with travel switch and uses, and in order to limit the rotational angle of fixed frame, and based on the soft limit function of scrambler, avoids travel switch fault and causes accident, thus ensure that the normal operation of equipment.
On the basis of aforementioned structure, the present embodiment have also been devised a fixed mechanism in order to simplify the one-piece construction of Finish measurement instrument, makes its structure compacter.After this fixed mechanism adopts section bar welding, plastic-blasting forms, it comprises the control box housing 7 in order to apparatus control system, and the mounting bracket 8 be arranged on this control box housing 7, this mounting bracket 8 has the straight plate of through hole for upper end, be respectively arranged with mounting bracket 8 in the both sides that control box housing 7 is relative, rotation axis 3 is flexibly connected with mounting bracket 8 through described through hole.
The concrete measuring method of this Finish measurement instrument is as follows:
One, parabolic mirror is installed on the rotating shaft;
Two, PLC provides angle of incidence of sunlight degree information to control system; This PLC is the art common apparatus, and it according to astronomical algorithm, can calculate the incident angle of sunshine with the corresponding longitude residing for equipment, latitude; This PLC can be placed on Master Control Room, also can be placed on separately in control box housing to form a part for Finish measurement instrument;
Three, control system controls rotation axis rotation by servomotor, speed reduction unit, makes it drive radiation gauge and parabolic mirror to follow the tracks of sunshine;
Four, the relevant information of scrambler and obliquity sensor feedback fixed frame rotational angle is to control system, and judge that whether fixed frame rotational angle is correct by control system, no, then relevant manipulation is carried out to rotation axis, till fixed frame rotational angle meets tracking operation;
Five, the radiation information received separately is fed back to control system by two radiation gauges;
Six, control system carries out relevant comparative's calculating, and judges that parabolic mirror is the need of clean, is, then send clean warning.
Before measuring instrument is followed the tracks of sunshine, at home, arrive the sunrise time, namely start to follow the tracks of, and do not stop all the time (Autumnal Equinox to the Spring Equinox stage oil pump start-up time between at day, with sunrise time phase difference about 30 minutes, wouldn't follow the tracks of, by the time at sunrise between start again to follow the tracks of), in sun intensity enough or sun intensity not enough but weather without exception adopt astronomical algorithm to follow the tracks of.Blow, rain, snow, the anomalous weather signal such as hail is responsible for providing by weather station, and passed on PLC by RS485 communication by host computer.Arrive sunset time, follow the tracks of and terminate, can stop following the tracks of, equipment returns home with hedging speed.
According to above-described embodiment, well the present invention can be realized.What deserves to be explained is, the present invention adopt two radiation gauges as the core of measuring instrument, it is that the sunshine reflected based on parabolic mirror is in theory consistent with the sunshine that reality receives, designing points of the present invention is and the solar radiation of parabolic mirror reflects and the solar radiation received in theory is compared, according to these main points, as according to the measurement mechanism in order to receive distribution of light, one of them is in order to gather the distribution situation of parabolic mirror institute reflection ray, another is in order to gather the distribution of light situation of sunshine incidence, and by corresponding control system, the two is carried out comparing calculation, also the present invention can be realized.
Claims (10)
1. based on the Finish measurement instrument of parabolic mirror, it is characterized in that: this Finish measurement instrument comprises installing parabolic mirror and drives it to follow the tracks of the rotating mechanism of sunshine, follow rotating mechanism motion and in order to the testing agency of the radiation intensity that records parabolic mirror reflects and solar radiation intensity, and in order to process, the control system controlling rotating mechanism and testing agency, the comparing calculation of this control system to the radiation intensity of parabolic mirror and solar radiation intensity judges that parabolic mirror is the need of clean.
2. the Finish measurement instrument based on parabolic mirror according to claim 1, is characterized in that: this Finish measurement instrument also comprises the PLC providing angle of incidence of sunlight degree.
3. the Finish measurement instrument based on parabolic mirror according to claim 1 and 2, it is characterized in that: described testing agency comprises the horizontal radiation gauge (2) of two of being connected with described rotating mechanism by fixed frame (1), and the radiation receiving surface of the two is contrary.
4. the Finish measurement instrument based on parabolic mirror according to claim 3, is characterized in that: described rotating mechanism comprises rotation axis (3), and is arranged on rotation axis (3) one end and actuating unit in order to drive rotation axis (3) to rotate; Described fixed frame (1) is then arranged on rotation axis (3).
5. the Finish measurement instrument based on parabolic mirror according to claim 4, is characterized in that: the obliquity sensor being also provided with to gather fixed frame (1) degree of rotation on described fixed frame (1).
6. the Finish measurement instrument based on parabolic mirror according to claim 5, is characterized in that: described actuating unit comprises the servomotor (4) being arranged on rotation axis (3) one end, and the speed reduction unit (5) be connected with servomotor (4); Described servomotor (4), speed reduction unit (5) are connected successively with rotation axis (3) and three is coaxial.
7. the Finish measurement instrument based on parabolic mirror according to claim 4 or 5 or 6, is characterized in that: be also provided with scrambler (6) at the other end of described rotation axis (3).
8. the Finish measurement instrument based on parabolic mirror according to claim 7, it is characterized in that: described fixed frame (1) one end and rotation axis (3) are fastenedly connected, described radiation gauge (2) is then arranged on the other end relative with rotation axis (3), and radiation gauge (2) one of them be positioned at the framework of fixed frame (1), it is outer and be arranged on the side of fixed frame (1) that another radiation gauge (2) is then positioned at the framework of fixed frame (1).
9. the Finish measurement instrument based on parabolic mirror according to claim 8, it is characterized in that: this Finish measurement instrument also comprises installing the fixed mechanism of rotating mechanism, this fixed mechanism comprises the control box housing (7) in order to apparatus control system, and is arranged on the mounting bracket (8) on this control box housing (7); Described rotation axis (3) is then arranged on this mounting bracket (8) and is above also flexibly connected with it.
10., based on the measuring method of the Finish measurement instrument of parabolic mirror, it is characterized in that, comprise the following steps:
(1) parabolic mirror is installed on the rotating shaft;
(2) PLC provides angle of incidence of sunlight degree information to control system;
(3) control system controls rotation axis by servomotor, speed reduction unit, makes it drive radiation gauge and parabolic mirror to follow the tracks of sunshine;
(4) information of scrambler and obliquity sensor feedback fixed frame rotational angle is to control system, and judge that whether fixed frame rotational angle is correct by control system, no, then relevant manipulation is carried out to rotation axis, till fixed frame rotational angle meets tracking operation;
The radiation information received separately is fed back to control system by (5) two radiation gauges;
(6) control system carries out relevant comparative's calculating, and judges that parabolic mirror is the need of clean, is, then send clean warning.
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| CN201210582872.4A CN103063615B (en) | 2012-12-28 | 2012-12-28 | Roughness measuring instrument based on parabolic reflector, and measuring method thereof |
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| CN201210582872.4A CN103063615B (en) | 2012-12-28 | 2012-12-28 | Roughness measuring instrument based on parabolic reflector, and measuring method thereof |
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| CN105548213A (en) * | 2014-10-31 | 2016-05-04 | 中广核太阳能开发有限公司 | Mirror surface cleanliness analyzer and mirror surface cleanliness analysis method |
| CN109142333A (en) * | 2018-08-16 | 2019-01-04 | 北京乐普医疗科技有限责任公司 | A kind of detection system to fail for reflector on chemical illumination immunity analysis instrument |
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| CN102575985A (en) * | 2009-10-08 | 2012-07-11 | Vtt技术研究中心 | Measuring instrument and method for determination of the properties of an item and its surface |
| CN102707733A (en) * | 2012-06-07 | 2012-10-03 | 中国华能集团清洁能源技术研究院有限公司 | Reflector alignment detection device and working method thereof |
| CN203025087U (en) * | 2012-12-28 | 2013-06-26 | 天威（成都）太阳能热发电开发有限公司 | Finish measuring apparatus based on parabolic reflector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009300085A (en) * | 2008-06-10 | 2009-12-24 | Arc Harima Kk | Surface property measuring instrument |
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| CN2668929Y (en) * | 2003-08-22 | 2005-01-05 | 孟祥军 | Intermittent transposition control mechanism |
| CN102575985A (en) * | 2009-10-08 | 2012-07-11 | Vtt技术研究中心 | Measuring instrument and method for determination of the properties of an item and its surface |
| CN102707733A (en) * | 2012-06-07 | 2012-10-03 | 中国华能集团清洁能源技术研究院有限公司 | Reflector alignment detection device and working method thereof |
| CN203025087U (en) * | 2012-12-28 | 2013-06-26 | 天威（成都）太阳能热发电开发有限公司 | Finish measuring apparatus based on parabolic reflector |
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Effective date of registration: 20210112 Address after: 195a, 17 houyongkang Hutong, Dongcheng District, Beijing Patentee after: TIANWEI NEW ENERGY SYSTEM ENGINEERING BEIJING Co.,Ltd. Address before: 610000 No.1 Tianwei Road, Industrial Development Zone, Southwest Airport Economic Development Zone, Shuangliu County, Chengdu City, Sichuan Province Patentee before: Tianwei (Chengdu) Solar Thermal Power Development Co.,Ltd. |
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