CN105509998A - Focusing solar simulator energy flux density measuring device and method - Google Patents
Focusing solar simulator energy flux density measuring device and method Download PDFInfo
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- CN105509998A CN105509998A CN201511018009.6A CN201511018009A CN105509998A CN 105509998 A CN105509998 A CN 105509998A CN 201511018009 A CN201511018009 A CN 201511018009A CN 105509998 A CN105509998 A CN 105509998A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a focusing solar simulator energy flux density measuring device and method and relates to the field of energy flux detection. The device and the method prevent large errors of facular energy flux density and facular total power acquired by means of a conventional measuring method. The device comprises a xenon lamp unit, a facular receiving unit, and a facular image acquiring and processing unit. A water-cooling diffuse reflection target is installed on an elevator. Focusing faculae generated by the xenon lamp unit converge on the surface of the water-cooling diffuse reflection target of the facular receiving unit. A high-temperature heat-flow meter is installed on the center of the water-cooling diffuse reflection target. A mobile diffuse reflection target moves along a motion guide rail. When the mobile diffuse reflection target moves to cover the high-temperature heat-flow meter, the facular image acquiring and processing unit acquires the images of the faculae and acquires the gray values of the faculae at the corresponding area of the high-temperature heat-flow meter. According to the readings of the high-temperature heat-flow meter and the gray values of the faculae at the corresponding area, a scale factor of the pixel gray values of the faculae and facular energy flux density values is calibrated. The facular energy flux density is obtained according to the grayscale image of the overall faculae is acquired.
Description
Technical field
The present invention relates to the energy flux density pick-up unit of the solar simulator that can flow in detection field, be specifically related to the energy flux density measurement mechanism of the high-power solar simulator of a kind of focus type.
Background technology
Solar simulator replaces sunshine with artificial light source thus realizes testing and targeting device in the one of lab simulation solar radiation characteristic.Focus type solar simulator can produce the high hot spot focusing on ratio, and it can flow peak value usually up to the even thousands of kW/m of hundreds of
2.The focal beam spot of the high fluence that the condenser place that it is mainly used in analog solar thermal power station produces, thus in laboratory environments the heat absorbers such as slot type endothermic tube, tower heat dump and dish-style Stirling-electric hybrid and thermal reactor are carried out to the research of thermal behavior.Focus type solar simulator is also significant to the research of the thermochemical property of high-temperature material simultaneously.
In the use procedure of focus type solar simulator, the measurement of the energy flux density of its hot spot is very important work.The key index evaluating solar simulator performance is not only in the distribution of the energy flux density of focal beam spot, and is important suction parameter when carrying out heat performance experiment to heat dump, high-temperature material etc.Because the energy flux density of focus type solar simulator can up to the every square meter of a few megawatt, the measuring method of thus traditional luminous power and measuring equipment are neither applicable.Usually adopt direct method to measure at present in actual applications, it is measured by the energy flux density of mobile high-temperature hot flowmeter to some points within the scope of hot spot, then being tried to achieve by method of interpolation by flow point cloth of whole hot spot.This method is very high for the precision of the measurement of the energy flux density value of measurement point, but the accuracy of the energy flow point cloth of whole hot spot then depends critically upon the number of measurement point and the positioning precision of high-temperature hot flowmeter.Usually the flux-density distribution of whole hot spot obtained by the method and the error of the general power of hot spot larger.Present stage does not also have the method and apparatus of the energy flux density of a kind of standard, simple and effective measurement focus type solar simulator.
Summary of the invention
The present invention solves the larger problem of the error of the flux-density distribution of hot spot that existing measuring method obtains and the general power of hot spot, provides a kind of focus type solar simulator energy flux density measurement mechanism and measuring method.
Focus type solar simulator energy flux density measurement mechanism, comprises xenon lamp unit, hot spot receiving element and light spot image acquisition and processing unit; Described hot spot receiving element comprises base, lifting table, water-cooled diffuse reflecting target, high-temperature hot flowmeter, motion guide rail and mobile diffuse reflecting target; Described water-cooled diffuse reflecting target is arranged on lifting table, and the focal beam spot that xenon lamp unit produces converges on the target surface of water-cooled diffuse reflecting target of hot spot receiving element; Described high-temperature hot flowmeter is arranged on the center of water-cooled diffuse reflecting target; Described mobile diffuse reflecting target moves along motion guide rail, moves to and covers high-temperature heat flux timing, and described light spot image acquisition and processing unit gathers the image of hot spot, obtains the gray-scale value of the hot spot that high-temperature hot flowmeter corresponding surface amasss;
According to the gray-scale value of the hot spot that reading and the high-temperature hot flowmeter corresponding surface of high-temperature hot flowmeter amass, demarcate in described light spot image acquisition and processing unit and measure the grey scale pixel value of camera and the scale factor of hot spot energy flux density value, and according to the gray level image of overall hot spot, obtain the flux-density distribution of overall hot spot.
Focus type solar simulator energy flux density measuring method, the method is realized by following steps:
The focal beam spot of step one, the outgoing of xenon lamp unit converges on the water-cooled diffuse reflecting target of hot spot receiving element; Regulate the height of lifting table, make described hot spot be positioned at the center of water-cooled diffuse reflecting target, and make high-temperature hot flowmeter be in the scope of hot spot;
Step 2, after the registration of high-temperature hot flowmeter is stablized, read the reading of heat flow meter; Move diffuse reflecting target by Electric Machine Control to move right, stop when mobile diffuse reflecting target blocks heat flow meter completely, with the light spot image measured camera shooting and receive, move diffuse reflecting target by Electric Machine Control after shooting and to playback the position of the leftmost side;
Step 3, the light spot image taken by described camera are by Computer Storage and carry out image procossing, the gray-scale value of the hot spot on the area corresponding to high-temperature hot flowmeter, the reading of the high-temperature hot flowmeter again according to step 2, calibrate the grey scale pixel value of hot spot and the scale factor of hot spot energy flux density value of measuring camera acquisition, according to the gray level image of hot spot, obtain the flux-density distribution of hot spot.
Beneficial effect of the present invention: focus type solar simulator energy flux density measurement mechanism of the present invention can carry out the measurement of energy flux density fast and accurately to the high power hot spot of focus type solar simulator.This device uses the indirect method of measurement, use the gray level image the scale factor calibrating the grey scale pixel value of camera and the energy flux density value of hot spot in conjunction with the reading of high-temperature hot flowmeter of measuring camera shooting hot spot, and then obtain the accurate flux-density distribution figure of hot spot.This measurement device speed is fast, and image procossing is simple, and accuracy of detection is higher, and according to the pixel number of used ccd detector, this device can reach the spatial resolution of millions of measurement points.
Accompanying drawing explanation
Fig. 1 is the structural representation of focus type solar simulator energy flux density measurement mechanism of the present invention;
Fig. 2 is the structural representation of the hot spot receiving element of focus type solar simulator energy flux density measurement mechanism of the present invention.
In figure, 1, xenon lamp, 2, catoptron, 3, hot spot receiving element, 4, ccd detector, 5, camera lens, 6, neutral filter, 7, computing machine, 8, base, 9, lifting table, 10, water-cooled diffuse reflecting target, 11, high-temperature hot flowmeter, 12, motion guide rail, 13, motor, 14, screw mandrel, 15, slide block, 16, mobile diffuse reflecting target.
Embodiment
Embodiment one, composition graphs 1 and Fig. 2 illustrate present embodiment, focus type solar simulator energy flux density measurement mechanism, comprise xenon lamp unit, hot spot receiving element 3 and light spot image acquisition and processing unit;
Described xenon lamp unit comprises xenon lamp 1 and catoptron 2, and a set of focus type solar simulator is made up of one or more xenon lamp unit, and its focal beam spot produced converges on hot spot receiving element 3.
Described hot spot receiving element 3 comprises base 8, lifting table 9, water-cooled diffuse reflecting target 10, high-temperature hot flowmeter 11, motion guide rail 12 and mobile diffuse reflecting target 16; Described water-cooled diffuse reflecting target 10 is arranged on lifting table 9, and there is circulating water its inside to ensure that whole target surface temperature can not be too high; Described lifting table 9 can be hand-operated lifting platform can be also electric lifting platform, is used for adjusting the height of water-cooled diffuse reflecting target 10, makes the focal beam spot produced by xenon lamp unit can beat on the target surface of water-cooled diffuse reflecting target 10; Described high-temperature hot flowmeter 11 is arranged on the center of water-cooled diffuse reflecting target 10, is used for measuring the absolute energy flux density of this hot spot;
Described motion guide rail 12 is made up of motor 13, screw mandrel 14 and slide block 15, can move at the control sliding block 15 of motor 13 along screw mandrel 14 left and right directions; Described mobile diffuse reflecting target 16 is arranged on the slide block 15 of motion guide rail 12, can move in left-right direction along with slide block 15.Parallel with the target surface of water-cooled diffuse reflecting target 10 when mobile diffuse reflecting target 16 moves, it can move right and cover high-temperature hot flowmeter 11, is obtained the gray-scale value of the hot spot on the corresponding area of heat flow meter by image acquisition.
As shown in Figure 1, described light spot image acquisition and processing unit comprises measures camera and computing machine 7, and the two is connected by data line; Described measurement camera is made up of ccd detector 4, camera lens 5 and neutral filter 6.Described measurement camera is arranged on the truss of solar simulator, when xenon lamp unit is multiple, position is positioned at the gap place of xenon lamp unit or the edge of whole solar simulator, to ensure to measure the image that phase function photographs hot spot,, the installation site measuring camera concrete includes but are not limited to the position shown in Fig. 1.Described neutral filter 6 is saturated in order to prevent ccd detector 4 from occurring.Described computing machine 7 is used for receiving the gray level image of the hot spot measuring camera shooting, and just can calibrate the measurement grey scale pixel value of camera and the scale factor of hot spot energy flux density value in conjunction with the reading of high-temperature hot flowmeter 11, then just can be obtained the flux-density distribution of glossing up by the gray level image of hot spot, and then also can calculate total radiation power of hot spot.
Embodiment two, composition graphs 1 and Fig. 2 illustrate present embodiment, and present embodiment is the measuring method of the focus type solar simulator energy flux density measurement mechanism described in embodiment one, and the method is realized by following steps:
One, the high-power focal beam spot produced by solar simulator converges on the water-cooled diffuse reflecting target 10 of hot spot receiving element 3, regulate the height of lifting table 9 to make hot spot be positioned at the center of water-cooled diffuse reflecting target 10, and high-temperature hot flowmeter 11 is also in the scope of hot spot.
Two, after the registration of high-temperature hot flowmeter 11 is stablized, read the reading of heat flow meter 11.Then control mobile diffuse reflecting target 16 by motor 13 to move right, stop when mobile diffuse reflecting target 16 blocks heat flow meter 11 completely, now with the light spot image measured on camera shooting receiving target, after shooting, control the reference position of mobile diffuse reflecting target 16 playback to the leftmost side with motor 13.The target surface of described water-cooled diffuse reflecting target 10 is parallel with the target surface of mobile diffuse reflecting target 16;
Three, the light spot image of shooting is stored by computing machine 7 and carries out image procossing, the gray-scale value of the hot spot on the area corresponding to heat flow meter 11 can be obtained, reading again in conjunction with heat flow meter 11 just can calibrate the measurement grey scale pixel value of camera and the scale factor of hot spot energy flux density value, then just can be obtained the flux-density distribution of glossing up by the gray level image of hot spot, and then also can calculate total radiation power of hot spot.
Claims (7)
1. focus type solar simulator energy flux density measurement mechanism, comprises xenon lamp unit, hot spot receiving element (3) and light spot image acquisition and processing unit; It is characterized in that;
Described hot spot receiving element (3) comprises base (8), lifting table (9), water-cooled diffuse reflecting target (10), high-temperature hot flowmeter (11), motion guide rail (12) and mobile diffuse reflecting target (16);
Described water-cooled diffuse reflecting target (10) is arranged on lifting table (9), and the focal beam spot that xenon lamp unit produces converges on the target surface of water-cooled diffuse reflecting target (10) of hot spot receiving element (3);
Described high-temperature hot flowmeter (11) is arranged on the center of water-cooled diffuse reflecting target (10);
Described mobile diffuse reflecting target (16) is moved along motion guide rail (12), move to when covering high-temperature hot flowmeter (11), described light spot image acquisition and processing unit gathers the image of hot spot, obtains the gray-scale value of the hot spot on high-temperature hot flowmeter (11) corresponding area;
According to the gray-scale value of the hot spot on the reading of high-temperature hot flowmeter (11) and high-temperature hot flowmeter (11) corresponding area, demarcate the grey scale pixel value of described measurement camera and the scale factor of hot spot energy flux density value, and according to the gray level image of overall hot spot, obtain the flux-density distribution of overall hot spot.
2. focus type solar simulator energy flux density measurement mechanism according to claim 1, it is characterized in that, described xenon lamp unit is one or more, each xenon lamp unit comprises xenon lamp (1) and catoptron (2), and the light that xenon lamp (1) produces converges on hot spot receiving element (3) through catoptron.
3. focus type solar simulator energy flux density measurement mechanism according to claim 1, it is characterized in that, described light spot image acquisition and processing unit comprises measures camera and computing machine (7), and described measurement camera is made up of ccd detector (4), camera lens (5) and neutral filter (6); Described measurement camera is arranged on the truss of solar simulator, and described computing machine (7) is for receiving the image of the hot spot measuring camera shooting.
4. focus type solar simulator energy flux density measurement mechanism according to claim 1, it is characterized in that, described motion guide rail (12) is made up of motor (13), screw mandrel (14) and slide block (15), moves along screw mandrel (14) left and right directions at the control sliding block (15) of motor (13); Described mobile diffuse reflecting target (16) is arranged on the slide block (15) of motion guide rail (12), along with slide block (15) moves in left-right direction, parallel with the target surface of water-cooled diffuse reflecting target (10) during mobile diffuse reflecting target (16) motion, move right and cover high-temperature hot flowmeter (11), gathered the gray-scale value of the hot spot on the corresponding area of image acquisition heat flow meter of hot spot by described light spot image acquisition and processing unit.
5. focus type solar simulator energy flux density measurement mechanism according to claim 1, it is characterized in that, described lifting table (9) is for adjusting the height of water-cooled diffuse reflecting target (10), and described lifting table (9) is hand-operated lifting platform or electric lifting platform.
6. the measuring method of focus type solar simulator energy flux density measurement mechanism according to claim 1, it is characterized in that, the method is realized by following steps:
The focal beam spot of step one, the outgoing of xenon lamp unit converges on the water-cooled diffuse reflecting target (10) of hot spot receiving element (3); Regulate the height of lifting table (9), make described hot spot be positioned at the center of water-cooled diffuse reflecting target (10), and high-temperature hot flowmeter (11) is also in the scope of hot spot;
Step 2, after the registration of high-temperature hot flowmeter (11) is stable, read the reading of heat flow meter (11); Control mobile diffuse reflecting target (16) by motor (13) to move right, stop when mobile diffuse reflecting target (16) blocks heat flow meter (11) completely, with the light spot image measuring camera shooting reception, after shooting, control the position of mobile diffuse reflecting target (16) playback to the leftmost side with motor (13);
Step 3, the light spot image taken by described camera are stored by computing machine (7) and carry out image procossing, the gray-scale value of the hot spot on the area corresponding to high-temperature hot flowmeter (11), the reading of the high-temperature hot flowmeter (11) again according to step 2, calibrate the grey scale pixel value of hot spot and the scale factor of hot spot energy flux density value of measuring camera acquisition, according to the gray level image of hot spot, obtain the flux-density distribution of hot spot.
7. focus type solar simulator energy flux density measuring method according to claim 3, is characterized in that, also comprise the flux-density distribution according to hot spot, calculate total radiation power of hot spot.
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| CN110059703A (en) * | 2019-04-04 | 2019-07-26 | 浙江中控太阳能技术有限公司 | A kind of heat dump energy-flux density self-checking device and method |
| CN112923589A (en) * | 2021-02-05 | 2021-06-08 | 中国科学院电工研究所 | Real-time measurement method for surface heat flux density distribution of external solar heat absorber |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109036009A (en) * | 2018-01-19 | 2018-12-18 | 北京市遥感信息研究所 | A kind of spatial remotely sensed imaging semi-physical simulation platform based on the tilting mode of sand table |
| CN109064842A (en) * | 2018-01-19 | 2018-12-21 | 北京市遥感信息研究所 | A kind of spatial remotely sensed imaging semi-physical simulation platform based on uniform zoom mode |
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| CN110059703A (en) * | 2019-04-04 | 2019-07-26 | 浙江中控太阳能技术有限公司 | A kind of heat dump energy-flux density self-checking device and method |
| CN112923589A (en) * | 2021-02-05 | 2021-06-08 | 中国科学院电工研究所 | Real-time measurement method for surface heat flux density distribution of external solar heat absorber |
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Application publication date: 20160420 |