A method, device, medium and equipment for testing the deviation of the light concentration efficiency of a heliostat

Abstract

The present invention provides a method, device, medium and equipment for testing the deviation of the light concentration efficiency of a heliostat, belonging to the field of solar power generation. The method includes: adjusting the positions of the heliostat structure model and the Lambert target; applying wind loads with various parameters to the heliostat structure model, and obtaining the positions of the reflected light spots at a preset frequency; determining the light concentration efficiency of the Lambert target according to the positions of the light spots; and determining the deviation effect of the wind load on the light concentration efficiency of the heliostat structure model according to the light concentration efficiency and the parameters of the wind load. In this way, the deviation effect of the wind load on the light concentration efficiency of the heliostat is obtained, and further the light concentration deviation of the heliostat under wind-induced vibration is traced, which is beneficial to improving the structure transmission system and the tracking control system of the heliostat, reducing the influence of the actual working environment of the heliostat on the light concentration deviation of the heliostat, improving the tracking accuracy of the heliostat structure, and having important engineering value for promoting the popularization and application of the solar thermal power generation technology.

Description

Technical Field

[0001] The present invention belongs to the field of solar power generation, and particularly relates to a method, device, medium and equipment for testing the deviation of the light concentration efficiency of a heliostat. Background Art

[0002] Tower-type solar thermal power plants are usually built in open wild areas such as the edges of deserts, gobi and plateaus. The light and flexible heliostat structure is very sensitive to the action of wind loads. The wind-induced vibration of its structural support structure system is likely to cause the reflection light spot to drift, resulting in the average light concentration rate of the heliostat dropping from 95.5% to 72.2%, causing relatively serious loss of solar energy, a decrease in equipment utilization rate, and an increase in power generation cost.

[0003] Considering the actual service environment and structural characteristics of the heliostat, on the one hand, the shielding effect of the open site is weak, and on the other hand, the heliostat structure is light, flexible and has a prominent blunt body effect of the structure, resulting in the structure being extremely prone to vibration under the action of wind loads, thereby affecting the light concentration efficiency.

[0004] The existing tracking and deviation correction methods that comprehensively use the tracking and deviation correction method based on the geometric error parameter model and the deviation correction method of modifying the position of the tracking target point can effectively improve the tracking accuracy of the heliostat, but this method only considers the process requirements of the heliostat for light concentration, resulting in a large light concentration deviation of the heliostat in actual application and working scenarios. Summary of the Invention

[0005] Based on this, it is necessary to provide a method, device, medium and equipment for testing the deviation of the light concentration efficiency of a heliostat in view of the above technical problems.

[0006] In order to achieve the above object, the present invention provides the following technical solutions.

[0007] In the first aspect, the present invention provides a method for testing the deviation of the light concentration efficiency of a heliostat, which is applied to a heliostat wind tunnel test model. The wind tunnel test model includes a heliostat structure model, a Lambert target and a laser emitter; the heliostat structure model is used to reflect the laser beam emitted by the laser emitter to the Lambert target; the method includes: adjusting the positions of the heliostat structure model and the Lambert target so that the laser beam emitted by the laser emitter irradiates the center of the reflection mirror surface of the heliostat structure model, and making the light spot of the reflected light project onto the center of the Lambert target; setting wind loads with various parameters to exert an influence on the heliostat structure model, and acquiring the position of the reflected light spot of the heliostat structure model under the action of the wind load at a preset frequency; determining the light concentration efficiency of the Lambert target according to the position of the light spot.

[0008] Optionally, determining the light concentration efficiency of the Lambert target based on the light spot position includes: obtaining the number of effective light spots projected onto the Lambert target; determining the light concentration efficiency of the Lambert target according to the ratio of the number of effective light spots to the total number of light spots.

[0009] Optionally, determining the light concentration efficiency of the Lambert target based on the light spot position further includes: adjusting the reflection mirror angle of the heliostat structure model; determining the light concentration efficiency of the Lambert target at different reflection mirror angles.

[0010] Determine the deviation influence of the wind load on the light concentration efficiency of the heliostat structure model according to the light concentration efficiency and the parameters of the wind load.

[0011] Optionally, determining the deviation influence of the wind load on the light concentration efficiency of the heliostat structure model includes: constructing a coordinate system with the center of the Lambert target as the origin; respectively determining the variation law of the offset of the light spot on the X-axis and Y-axis with time according to the light spot position.

[0012] Optionally, determining the deviation influence of the wind load on the light concentration efficiency of the heliostat structure model further includes: obtaining the vibration displacement of the reflection mirror; respectively determining the variation law of the offset of the light spot on the X-axis and Y-axis with the vibration displacement according to the light spot position.

[0013] Optionally, determining the deviation influence of the wind load on the light concentration efficiency of the heliostat structure model further includes: adjusting the parameters of the wind load; determining the variation law of the offset of the light spot on the X-axis and Y-axis with the parameters of the wind load according to the light spot position.

[0014] Optionally, the heliostat structure model includes an elastic model and a rigid model; the method further includes: obtaining the difference in light concentration efficiency between the elastic model and the rigid model; determining the influence of the structural vibration on the light concentration efficiency according to the difference in light concentration efficiency.

[0015] In a second aspect, the present invention also provides a device for testing the deviation of the heliostat light concentration efficiency, which is applied to a heliostat wind tunnel test model. The wind tunnel test model includes a heliostat structure model, a Lambert target, and a laser emitter; the heliostat structure model is used to reflect the laser beam emitted by the laser emitter to the Lambert target; the system includes:

[0016] An adjustment module, configured to adjust the positions of the heliostat structure model and the Lambert target, so that the laser beam emitted by the laser emitter irradiates the center of the reflection mirror of the heliostat structure model, and the light spot of the reflected light is projected onto the center of the Lambert target.

[0017] Optionally, the adjustment module is further configured to adjust the reflection mirror angle of the heliostat structure model.

[0018] Optionally, the adjustment module is further configured to adjust the parameters of the wind load.

[0019] An acquisition module, configured to apply the wind load with multiple parameters to the heliostat structure model, and acquire the position of the reflected light spot of the heliostat structure model under the action of the wind load at a preset frequency.

[0020] Optionally, the acquisition module is further configured to acquire the number of effective light spots projected onto the Lambert target.

[0021] Optionally, the acquisition module is further configured to acquire the vibration displacement of the reflecting mirror surface.

[0022] Optionally, the heliostat structure model includes an elastic model and a rigid model; the acquisition module is further configured to acquire the difference in light collection efficiency between the elastic model and the rigid model.

[0023] A determination module, configured to determine the light collection efficiency of the Lambert target according to the position of the light spot; and determine the deviation effect of the wind load on the light collection efficiency of the heliostat structure model according to the light collection efficiency and the parameters of the wind load.

[0024] Optionally, the determination module is configured to determine the light collection efficiency of the Lambert target according to the ratio of the number of effective light spots to the total number of light spots.

[0025] Optionally, the determination module is further configured to determine the light collection efficiency of the Lambert target at different angles of the reflecting mirror surface.

[0026] Optionally, the determination module is further configured to construct a coordinate system with the center of the Lambert target as the origin; and respectively determine the variation law of the offset of the light spot on the X-axis and Y-axis with time according to the position of the light spot.

[0027] Optionally, the determination module is further configured to respectively determine the variation law of the offset of the light spot on the X-axis and Y-axis with the vibration displacement according to the position of the light spot.

[0028] Optionally, the determination module is further configured to respectively determine the variation law of the offset of the light spot on the X-axis and Y-axis with the parameters of the wind load according to the position of the light spot.

[0029] Optionally, the determination module is further configured to determine the influence of the structural vibration on the light collection efficiency according to the difference in light collection efficiency.

[0030] In a third aspect, the present invention provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the above-mentioned method for testing the deviation of the heliostat light collection efficiency is implemented.

[0031] Fourthly, the present invention provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the above-mentioned heliostat light-concentration efficiency deviation test method is implemented.

[0032] The heliostat light-concentration efficiency deviation test method provided by the present invention has the following beneficial effects:

[0033] In this way, by recording and studying the change of the light spot position under the action of wind load, the deviation influence of wind load on the light-concentration efficiency of the heliostat is obtained, and further the light-concentration deviation of the heliostat under wind-induced vibration is tracked, which is beneficial to improving the structural drive system and tracking control system of the heliostat, reducing the influence of the actual working environment of the heliostat on the light-concentration deviation of the heliostat, improving the tracking accuracy of the heliostat structure, and having important engineering value for promoting the popularization and application of solar thermal power generation technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention and their design schemes, the accompanying drawings required for the present embodiments will be briefly introduced below. The accompanying drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a flowchart of a heliostat light-concentration efficiency deviation test method provided by the present invention;

[0036] Figure 2 It is a schematic diagram of a wind tunnel test device provided by the present invention according to an embodiment;

[0037] Figure 3 It is a line graph of wind load data provided by the present invention according to an embodiment;

[0038] Figure 4 It is another line graph of wind load data provided by the present invention according to an embodiment;

[0039] Figure 5 It is a schematic diagram of a Lambert target provided by the present invention according to an embodiment;

[0040] Figure 6 It is a block diagram of a heliostat light-concentration efficiency deviation test device provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to enable those skilled in the art to better understand the technical solutions of the present invention and implement them, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0042] Compared with fossil energy, solar energy has unique advantages of wide distribution, sufficient reserves, cleanliness and safety, and has broad commercial application prospects. In recent years, it has been growing steadily both globally and in China. Among them, solar thermal power generation technology has no phenomenon of "abandoning light" and has advantages such as energy storage safety and peak shaving power supply.

[0043] Tower-type solar thermal power plants are usually built in open wild areas such as the edges of deserts, gobi, and plateaus. The heliostat field is the core concentrating device of the power plant, mainly composed of optical reflectors, support structures, columns, drive systems, and tracking control systems, accounting for more than 50% of the total investment of the power plant. Specifically, solar radiation reaches the surface of the concentrating mirror directly through the atmosphere and is absorbed by the porous heat-absorbing material inside the cavity-type heat absorber after a series of physical processes such as refraction - reflection - scattering. The heliostat field is generally in areas with sufficient sunlight and open and windy conditions. Usually, the design requirement is that the power plant can operate normally at a wind speed of level 6, that is, the mirror deformation error and tracking error are within the allowable range and the support structure is safe. However, the lightweight and high-flexibility heliostat structure is very sensitive to wind load effects. The wind-induced vibration of its structural support structure system is likely to cause the reflection light spot to drift, resulting in the average light concentration ratio of the heliostat dropping from 95.5% to 72.2%, causing relatively serious loss of solar energy, a decrease in equipment utilization rate, and an increase in power generation cost.

[0044] There are currently three methods for heliostat tracking error, namely the tracking axis reference position misalignment method, the virtual displacement method of the heliostat spatial position, and the tracking error method based on the geometric error model. Among them, the comprehensive application of the tracking and rectification method based on the geometric error parameter model and the rectification method of modifying the tracking target point position can effectively improve the tracking accuracy of the heliostat. However, this method only considers the technological requirements of heliostat light concentration and has not yet considered the deviation caused by wind-induced vibration in the heliostat light concentration. Considering the actual service environment and structural characteristics of the heliostat, one is that the shielding effect in the open area is weak, and the other is that the heliostat structure is lightweight and high-flexible and the blunt body effect of the structure is prominent, resulting in the structure being extremely prone to vibration under wind load, thus affecting the light concentration efficiency. Therefore, the stability of the heliostat structure under wind action and the accuracy of the heliostat reflecting sunlight to the collector are particularly important.

[0045] To solve the above problems, the present invention provides a method for testing the deviation of the concentrating efficiency of a heliostat, which is applied to a device for testing the deviation of the concentrating efficiency of a heliostat. The system includes: a wind tunnel testing device, which includes: a heliostat structure model, a Lambert target, and a laser emitter; the heliostat structure model is used to reflect the laser beam emitted by the laser emitter to the Lambert target; the method includes: adjusting the positions of the heliostat structure model and the Lambert target so that the laser beam emitted by the laser emitter irradiates the center of the reflecting mirror surface of the heliostat structure model and the light spot is reflected to the center of the Lambert target; within a preset time period, obtaining the positions of the reflected light spots of the heliostat structure model under the action of wind load at a first time interval; the first time interval is less than or equal to the preset time period; determining the concentrating efficiency of the Lambert target according to the positions of the light spots; determining the deviation influence of the wind load on the concentrating efficiency of the heliostat structure model according to the concentrating efficiency and the parameters of the wind load. In this way, by recording and studying the change of the light spot position under the action of wind load, the coupling relationship between the concentrating efficiency of the heliostat and the wind load can be obtained, and the concentrating deviation of the heliostat under wind-induced vibration can be traced, which is beneficial to improving the structure transmission system and tracking control system of the heliostat, reducing the influence of the actual working environment of the heliostat on the concentrating deviation of the heliostat, improving the tracking accuracy of the heliostat structure, and having important engineering value for promoting the popularization and application of solar thermal power generation technology.

[0046] The following will, with reference to the accompanying drawings, detail the technical solutions provided by the embodiments of the present invention.

[0047] The present invention provides a method for testing the deviation of the concentrating efficiency of a heliostat, which is applied to a heliostat wind tunnel test model. The wind tunnel test model includes a heliostat structure model, a Lambert target, and a laser emitter; the heliostat structure model is used to reflect the laser beam emitted by the laser emitter to the Lambert target; specifically as Figure 1 shown, the method includes:

[0048] S101. Adjust the positions of the heliostat structure model and the Lambert target.

[0049] Specifically, so that the laser beam emitted by the laser emitter irradiates the center of the reflecting mirror surface of the heliostat structure model and the light spot is reflected to the center of the Lambert target.

[0050] S102. Apply wind loads with various parameters to affect the heliostat structure model, and obtain the positions of the reflected light spots of the heliostat structure model under the action of wind load at a preset frequency.

[0051] Among them, various parameters of the wind load include the wind direction angle and wind speed of the wind load. Specifically, the parameters of the wind load can be changed by means of controlling variables. For example, the wind speed can be adjusted while keeping the wind direction angle of the wind load unchanged; or, the wind direction angle can be adjusted while keeping the wind speed unchanged in order to obtain more accurate data.

[0052] S103. Determine the light concentration efficiency of the Lambert target according to the position of the light spot.

[0053] Specifically, the number of effective light spots projected onto the Lambert target can be obtained. The effective light spot is the light spot projected onto the Lambert target; the light concentration efficiency of the Lambert target is determined according to the number of effective light spots and the total number of light spots.

[0054] In addition, the reflection mirror angle of the heliostat structure model can also be adjusted; the light concentration efficiency of the Lambert target is determined under different reflection mirror angles.

[0055] S104. Determine the deviation influence of the wind load on the light concentration efficiency of the heliostat structure model according to the light concentration efficiency and the parameters of the wind load.

[0056] Specifically, in order to further study the influence of the wind load on the heliostat, the present invention provides the following methods to study the deviation influence of the wind load:

[0057] First, a coordinate system can be constructed with the center of the Lambert target as the origin; according to the position of the light spot, the variation law of the offset of the light spot on the X-axis and Y-axis with time is determined.

[0058] Second, the structural vibration displacement of the reflection mirror can be obtained; according to the position of the light spot, the variation law of the offset of the light spot on the X-axis and Y-axis with the structural vibration displacement is determined.

[0059] Finally, the parameters of the wind load can be adjusted; according to the position of the light spot, the variation law of the offset of the light spot on the X-axis and Y-axis with the parameters of the wind load is determined.

[0060] In addition, in order to quantitatively study the influence of wind-induced vibration on the light concentration efficiency of the heliostat, the heliostat structure model can also include an elastic model and a rigid model; the difference in light concentration efficiency between the elastic model and the rigid model is obtained; the influence of the structural vibration on the light concentration efficiency is determined according to the difference in light concentration efficiency.

[0061] In order to implement the research on the deviation influence of the wind load proposed above in the present invention, the present invention provides the following specific implementation schemes:

[0062] A wind tunnel test model for tracking the influence of wind-induced vibration on the deviation of heliostats proposed by the present invention includes a wind tunnel test structure response test device, an aeroelastic model of the heliostat structure, a CCD camera of model MV-EM120M, a Lambert target, and a total station Trimble S6, as Figure 2 shown. Among them, the wind tunnel test equipment mainly includes a hot film anemometer, a laser displacement meter, a micro acceleration sensor, and roughness elements and spires for simulating the actual wind field environment.

[0063] Before the wind vibration response test, first design and manufacture an aeroelastic model according to similarity criteria such as geometric shape similarity, elastic stiffness similarity, and mass system similarity of the heliostat structure, and install a laser displacement meter and a micro acceleration sensor at the parts with prominent blunt body characteristics of the structure. The parts with prominent blunt body characteristics of the structure can be the reflecting mirror surface to monitor the vibration response of the structure under wind load. The vibration measurement test of this aeroelastic model lasts for 10 minutes, and the corresponding sampling frequency is 312.5 Hz. Secondly, arrange roughness elements and spires in the upstream area of the model to simulate the actual wind field environment of the solar thermal power station. At the same time, install a hot film anemometer in the upstream area of the model to monitor the incoming flow wind speed at the height of the test reference point, and finally make the mean wind profile, turbulence intensity profile, and wind speed power spectrum coincide with the theoretical curve, as Figure 3 shown in the mean wind profile and turbulence intensity, and Figure 4 shown in the pulsating wind speed power spectrum in

[0064] to ensure the accuracy of the test. Figure 5 In this test device, the model used is an aeroelastic model, which realizes the simulation of the mutual influence between the deformation and vibration of the structure under the action of fluid load, and is consistent with the actual service environment of the heliostat structure. At the same time, in order to monitor the influence of the wind-induced vibration of the structure on the concentrating and tracking deviation of the heliostat, as

[0065] shown, a Lambert target with a length and width of 1 m is arranged in the upstream area of the model; a CCD camera of model MV-EM120M with a lens focal length of 12 mm is selected and fixed on the tripod head on the ground to continuously photograph the sunspots on the Lambert target, so as to obtain the tracking error of the heliostat on the target surface changing with time.

[0066] Then adjust the laser emitter fixed on the tripod panhead. Based on the principle of light incidence-reflection-concentration between the heliostat and the solar receiver tower, adjust the laser emitter so that the light spot is reflected through the center of the mirror surface to the center O point of the Lambert target surface. At this time, the light spot coordinates of the reflecting mirror surface and the Lambert target surface are the three-dimensional coordinates of the center positions of the heliostat and the target. Use the total station Trimble S6 to measure the coordinates of the center O of the target surface as (0, 0, 0), and the coordinates of the center O' of the reflecting mirror surface as (x', y', z').

[0067] Carry out the heliostat wind-induced vibration response test in the well-tuned wind tunnel. If the structural stiffness of the heliostat is large enough, the model will not vibrate under the action of wind load, and then the light spot will not shift. However, due to the influence of the actual dynamic characteristics of the structure and the wind field environment, the heliostat structure is prone to vibration. The essence of this experiment is to set up a light spot offset test device and simultaneously conduct the vibration measurement test of the aeroelastic model of the heliostat structure, that is, the fluid-structure coupling effect between the wind field and the structure, and at the same time consider the tracking deviation of the heliostat under the influence of wind-induced vibration. At the same time, use a CCD camera to continuously capture the light spots reflected on the Lambert target surface through the heliostat, and sequentially number the light spots according to the appearance order as 5, 6, 7, 8, 9... Secondly, use the total station Trimble S6 to measure the coordinates of each light spot on the target surface, and use the centroid method to calculate the offset distances (Δx 1 , Δx 2 , Δx 3 ,...) and (Δy 1 , Δy 2 , Δy 3 ,...) between each light spot and the center of the target surface along the X-axis and Y-axis. Since the center of the target surface coincides with the reflected light spot at the beginning, and the center of the target surface is defined as the coordinate center O, the abscissa and ordinate of each light spot captured by the CCD camera in the test are the offset distances between it and the center of the target surface along the X-axis and Y-axis.

[0068] Statistically analyze the number m 1 of light spots reflected on the Lambert target surface through the reflecting mirror surface within 10 minutes of continuous vibration measurement total , and the total number m

[0069]

[0070] of the light spot reflection points continuously captured by the CCD camera. On this basis, considering the influence degree of wind-induced vibration, calculate the light concentration efficiency E(t) of the Lambert target. The specific formula is as follows:

[0071] Based on the acquisition frequency of the wind-induced vibration response of the heliostat structure's aeroelastic model, it is statistically obtained that: ① the variation law of the offset distance of the light spot along the X-axis and Y-axis with time; ② the variation law of the offset distance of the light spot along the X-axis and Y-axis with the average displacement of the structural vibration; ③ the variation law of the offset distance of the light spot along the X-axis and Y-axis with the wind direction angle; ④ the variation law of the offset distance of the light spot along the X-axis and Y-axis with the wind speed; On this basis, analyze the influence laws of the wind-induced vibration response, wind direction angle, and wind speed on the concentrating and heat collection efficiency.

[0072] Furthermore, in order to comparatively illustrate the influence degree of the wind-induced vibration on the concentrating and heat collection efficiency of the heliostat structure, based on the above tests, an ideal rigid scale model of the heliostat structure is made of an ABS board, that is, this model will not vibrate under the action of wind load, and tests on the influence of wind speed, wind direction, and wind-induced vibration on its concentrating efficiency under different elevation angles of the heliostat are carried out. Then, the same test device and steps are used to collect the number m' of light spots reflected from the reflecting mirror surface to the Lambert target surface 1 and the total number m' of the reflected point of the light spot continuously photographed by the CCD camera total , and calculate the concentrating efficiency E'(t) of the Lambert target. The specific formula is as follows:

[0073]

[0074] In addition, the difference between the concentrating efficiency E(t) of the Lambert target in the aeroelastic model vibration measurement test and the concentrating efficiency E'(t) of the Lambert target obtained in the rigid model test can also be comparatively analyzed through the following formula, and the influence degree of the wind-induced vibration of the heliostat structure on the concentrating and heat collection efficiency of the reflecting mirror surface is quantitatively analyzed, so as to provide accurate data for optimizing the design of the transmission system and tracking control system of the heliostat structure. The specific formula is as follows:

[0075] ΔE = E'(t) - E(t)

[0076] This embodiment focuses on the problem of the concentrating deviation of the heliostat caused by the wind-induced vibration, designs a wind tunnel test device, makes a rigid model and an aeroelastic model of the heliostat respectively, selects a Lambert target to replace the heat absorber at the top of the heat absorption tower according to the optical incidence-reflection principle, continuously photographs the number of light spots and the number of overflow light spots on the surface of the Lambert target by using a CCD camera during the test duration, thereby calculating the concentrating efficiency of the heliostat, and comparatively analyzing the difference in the concentrating efficiency of the Lambert target obtained from the two test measurements, accurately evaluating the influence degree of the wind-induced vibration on the concentrating deviation of the heliostat. On this basis, statistically analyze the variation laws of the light spot offset with time, wind direction, wind speed, and structural vibration displacement, provide a systematic mathematical and statistical basis for the optimization design of the transmission system and tracking control system of the heliostat structure in the actual project of the solar thermal power station, and then improve the heat absorption efficiency of the concentrating and heat collection field, and finally improve the power generation efficiency of the tower-type solar thermal power station.

[0077] By using the above method, the change of the spot position under the action of wind load is recorded and studied, and the deviation effect of the wind load on the light concentration efficiency of the heliostat is obtained. Furthermore, tracking the light concentration deviation of the heliostat under wind-induced vibration is beneficial to improving the structural drive system and tracking control system of the heliostat, reducing the influence of the actual working environment of the heliostat on the light concentration deviation, improving the tracking accuracy of the heliostat structure, and having important engineering value for promoting the popularization and application of solar thermal power generation technology.

[0078] The present invention also provides a device for testing the deviation of the light concentration efficiency of a heliostat, which is applied to a wind tunnel test model of a heliostat. The wind tunnel test model includes a heliostat structure model, a Lambert target, and a laser emitter; the heliostat structure model is used to reflect the laser beam emitted by the laser emitter to the Lambert target; as Figure 6 shown, the device includes:

[0079] An adjustment module 601, configured to adjust the positions of the heliostat structure model and the Lambert target, so that the laser beam emitted by the laser emitter irradiates the center of the reflecting mirror surface of the heliostat structure model, and the spot of the reflected light is projected onto the center of the Lambert target;

[0080] An acquisition module 602, configured to apply the influence of wind loads with multiple parameters to the heliostat structure model, and acquire the positions of the reflected spots of the heliostat structure model under the action of the wind loads at a preset frequency;

[0081] A determination module 603, configured to determine the light concentration efficiency of the Lambert target according to the spot position; and determine the deviation effect of the wind load on the light concentration efficiency of the heliostat structure model according to the light concentration efficiency and the parameters of the wind load.

[0082] Optionally, the acquisition module 602 is further configured to acquire the number of effective spots projected onto the Lambert target; the determination module 603 is configured to determine the light concentration efficiency of the Lambert target according to the ratio of the number of effective spots to the total number of spots.

[0083] Optionally, the adjustment module 601 is further configured to adjust the angle of the reflecting mirror surface of the heliostat structure model; the determination module 603 is further configured to determine the light concentration efficiency of the Lambert target at different angles of the reflecting mirror surface.

[0084] Optionally, the determination module 603 is further configured to construct a coordinate system with the center of the Lambert target as the origin; and respectively determine the variation law of the offset of the spot on the X-axis and Y-axis with time according to the spot position.

[0085] Optionally, the acquisition module 602 is further configured to acquire the vibration displacement of the reflecting mirror surface; the determination module 603 is further configured to respectively determine the variation law of the offset of the spot on the X-axis and Y-axis with the vibration displacement according to the spot position.

[0086] Optionally, the adjustment module 601 is further configured to adjust the parameters of the wind load; the determination module 603 is further configured to determine the variation law of the offset of the light spot on the X-axis and Y-axis with respect to the parameters of the wind load according to the position of the light spot.

[0087] Optionally, the heliostat structure model includes an elastic model and a rigid model; the acquisition module 602 is further configured to acquire the difference in the light collection efficiency between the elastic model and the rigid model; the determination module 603 is further configured to determine the influence of the structural vibration on the light collection efficiency according to the difference in the light collection efficiency.

[0088] By using the above system, by recording and studying the change in the position of the light spot under the action of the wind load, the deviation effect of the wind load on the light collection efficiency of the heliostat is obtained, and then the light collection deviation of the heliostat under wind-induced vibration is tracked, which is beneficial to improving the structural drive system and tracking control system of the heliostat, reducing the influence of the actual working environment of the heliostat on the light collection deviation, improving the tracking accuracy of the heliostat structure, and has important engineering value for promoting the popularization and application of solar thermal power generation technology.

[0089] The present invention also provides a computer-readable storage medium, which stores a computer program, and the computer program can be used to execute the above Figure 1 provided method for testing the deviation of the light collection efficiency of the heliostat.

[0090] The present invention also provides a computer device. At the hardware level, the computer device includes a processor, an internal bus, a network interface, a memory, and a non-volatile memory. Of course, it may also include other hardware required for other services. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it to implement the above Figure 1 provided method for testing the deviation of the light collection efficiency of the heliostat.

[0091] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0092] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, as well as the combination of flows and / or blocks in the flowchart and / or block diagram. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or means for implementing the functions specified in one or more blocks.

[0093] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means for implementing the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or means for implementing the functions specified in one or more blocks.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or means for implementing the functions specified in one or more blocks.

[0095] It should be noted that the above specific embodiments can enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any way. Therefore, although this specification has described the present invention in detail, those skilled in the art should understand that the present invention can still be modified or equivalently replaced; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention are covered by the protection scope of the patent of the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. A method for testing the deviation of heliostat concentration efficiency, characterized in that: Applied to a heliostat wind tunnel test model, the wind tunnel test model comprises a heliostat structure model, a Lambertian target and a laser transmitter; the heliostat structure model is used to reflect a laser beam emitted by the laser transmitter to the Lambertian target; the method comprises: Adjusting the positions of the heliostat structure model and the Lambertian target so that the laser beam emitted by the laser transmitter irradiates the center of the reflective mirror surface of the heliostat structure model and the light spot of the reflected light is projected to the center of the Lambertian target; Setting wind loads with multiple parameters to influence the heliostat structure model, and obtaining the position of the light spot reflected by the heliostat structure model under the wind load according to a preset frequency; Determining the focusing efficiency of the Lambertian target according to the light spot position; Determining the deviation effect of the wind load on the focusing efficiency of the heliostat structure model according to the focusing efficiency and the parameters of the wind load; Determining the focusing efficiency of the Lambertian target according to the light spot position includes: Obtain the number of effective light spots projected onto the Lambertian target; Determining the focusing efficiency of the Lambertian target according to the ratio of the number of effective light spots to the total number of light spots; Determining the deviation effect of the wind load on the focusing efficiency of the heliostat structure model includes: Constructing a coordinate system with the center of the Lambertian target as the origin; According to the position of the light spot, respectively determine the variation rules of the offset of the light spot on the X-axis and the Y-axis over time; Obtaining the vibration displacement of the reflective mirror surface; and determining, according to the position of the light spot, respectively the variation law of the offset of the light spot on the X-axis and the Y-axis along with the vibration displacement; Adjust the parameters of the wind load; determine the variation law of the offset of the light spot on the X-axis and the Y-axis with the parameters of the wind load according to the position of the light spot; The heliostat structure model includes an elastic model and a rigid model; the method further includes: obtaining a difference in light concentration efficiency between the elastic model and the rigid model; The influence of structural vibration on the light-gathering efficiency is determined according to the light-gathering efficiency difference.

2. The method for testing the heliostat concentration efficiency deviation according to claim 1, characterized in that: Determining the focusing efficiency of the Lambertian target according to the light spot position also includes: Adjusting the reflective mirror angle of the heliostat structure model; The focusing efficiency of the Lambertian target at different angles of the reflector is determined.

3. A heliostat focusing efficiency deviation test device, characterized in that: Applied to a heliostat wind tunnel test model, the wind tunnel test model comprises a heliostat structure model, a Lambertian target and a laser transmitter; the heliostat structure model is used to reflect the laser beam emitted by the laser transmitter to the Lambertian target; The heliostat structure model includes an elastic model and a rigid model; the device includes: An adjustment module, used for adjusting the positions of the heliostat structure model and the Lambertian target, so that the laser beam emitted by the laser transmitter irradiates the center of the reflective mirror surface of the heliostat structure model, and the light spot of the reflected light is projected to the center of the Lambertian target; An acquisition module, used for setting wind loads of various parameters to exert influence on the heliostat structure model, and acquiring the position of the light spot reflected by the heliostat structure model under the action of the wind load according to a preset frequency; A determination module is used to determine the focusing efficiency of the Lambertian target according to the spot position; determine the deviation effect of the wind load on the focusing efficiency of the heliostat structure model according to the focusing efficiency and the parameters of the wind load; obtain the number of effective spots projected on the Lambertian target; determine the focusing efficiency of the Lambertian target according to the ratio of the number of effective spots to the total number of spots; construct a coordinate system with the center of the Lambertian target as the origin; determine the change law of the offset of the spot on the X-axis and the Y-axis with time according to the spot position; obtain the vibration displacement of the reflector surface; determine the change law of the offset of the spot on the X-axis and the Y-axis with the vibration displacement according to the spot position; adjust the parameters of the wind load; determine the change law of the offset of the spot on the X-axis and the Y-axis with the parameters of the wind load according to the spot position; obtain the difference in focusing efficiency between the elastic model and the rigid model; and determine the influence of structural vibration on the focusing efficiency according to the difference in focusing efficiency.

4. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for testing the deviation of the heliostat concentration efficiency described in any one of claims 1 to 2 are implemented.

5. A computer device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for testing the deviation of the heliostat concentration efficiency as claimed in any one of claims 1 to 2 are implemented.

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