CN109596212B - Detection system and detection method for heliostat light condensation efficiency - Google Patents
Detection system and detection method for heliostat light condensation efficiency Download PDFInfo
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- 238000009833 condensation Methods 0.000 title claims abstract description 36
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
Abstract
The invention provides a detection system and a detection method for the condensation efficiency of a heliostat, which comprises the following steps: the heliostat control module, the data processing module, the image acquisition module, the image processing module, the wireless communication module and the GPS positioning module; wherein: the image acquisition module, the wireless communication module and the GPS positioning module are all arranged on the unmanned aerial vehicle; the heliostat control module is used for determining a heliostat to be detected, generating a heliostat angle rotation control instruction and rotating the heliostat to be detected to a preset angle; the data processing module is used for determining a detection point of the heliostat to be detected and heliostat angle data according to the current position of the unmanned aerial vehicle and calculating the light condensation efficiency of the measured heliostat; and the image acquisition module is used for acquiring mirror images under different exposure values. Therefore, under the condition that the normal work of the heat absorption tower is not influenced, the simultaneous detection of multiple detection points and multiple day mirrors above the mirror field is realized, the detection efficiency is improved, the detection result is more accurate, and the method is suitable for popularization.
Description
Technical Field
The invention relates to the technical field of solar thermal power generation, in particular to a heliostat light condensation efficiency detection system and a heliostat light condensation efficiency detection method.
Background
The heliostat light-gathering efficiency is an important factor influencing the efficiency of the tower-type solar power station, so that the heliostat light-gathering efficiency is required to be used as an important performance index in the heliostat design stage, and the index is tracked in real time in the assembling, debugging, verifying and operating stages of the heliostat so as to ensure the optical efficiency of the whole heliostat field.
In the prior art, a non-contact visual detection scheme is mostly adopted for detecting the condensation efficiency of the heliostat, a camera is used for collecting a light spot image formed by condensation of the heliostat on a target, then the geometric shape of the light spot is obtained through an image algorithm, and the condensation efficiency of the heliostat is calculated.
However, in this way, the light spot target needs to be installed at a specific position around the heat absorber, and a specific camera needs to be installed to collect a light spot image, and when the light condensing efficiency of the heliostats in a large-scale mirror field is detected, the efficiency is low, simultaneous detection of heliostats in the same area and multiple surfaces cannot be performed, and factors such as light pollution and the like are caused around the heat absorber, which affects the normal operation of the power station.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a detection system and a detection method for the light condensation efficiency of a heliostat.
In a first aspect, the present invention provides a heliostat light-gathering efficiency detection system, which is applied to a mirror field of a tower-type photothermal power station, and includes: the heliostat control module, the data processing module, the image acquisition module, the image processing module, the wireless communication module and the GPS positioning module; wherein: the image acquisition module, the wireless communication module and the GPS positioning module are all arranged on the unmanned aerial vehicle;
the heliostat control module is used for determining a heliostat to be detected in a mirror field of the tower type photo-thermal power station, and generating a heliostat angle rotation control instruction according to heliostat angle data generated by the data processing module so as to enable the heliostat to be detected to rotate to a preset angle;
the data processing module is used for determining a detection point of the heliostat to be detected and heliostat angle data according to the current position of the unmanned aerial vehicle; calculating the condensation efficiency of the heliostat to be measured according to the mirror surface condensation intensity distribution of the heliostat to be measured;
the image acquisition module is used for acquiring mirror images of the heliostat to be detected under different exposure values at a detection point and sending the mirror images to the image processing module for image processing through the wireless communication module;
the image processing module is used for processing the mirror surface image acquired by the image acquisition module to obtain the mirror surface condensation intensity distribution of the heliostat to be detected.
The wireless communication module is used for realizing data communication between the unmanned aerial vehicle and the heliostat control module, the data processing module, the image acquisition module, the image processing module and the GPS positioning module;
and the GPS positioning module is used for executing positioning of the unmanned aerial vehicle and determining the current flight attitude of the unmanned aerial vehicle.
Optionally, the heliostat control module is specifically configured to:
determining a heliostat to be detected in a mirror field of a tower type photo-thermal power station, and sending the coordinate position of the heliostat to be detected to a data processing module;
and generating a heliostat angle rotation control instruction after receiving heliostat angle data generated by the data processing module, so that the heliostat to be detected rotates to a preset angle, and sending an in-place signal to the unmanned aerial vehicle through the wireless communication module.
Optionally, the drone is specifically configured to:
positioning the unmanned aerial vehicle according to a GPS positioning module, and sending the current position of the unmanned aerial vehicle to the data processing module through the wireless communication module;
after receiving the detection points sent by the data processing module, flying to the detection points;
after receiving the in-place signal sent by the heliostat control module, the image acquisition module acquires mirror images of the heliostat to be detected under different exposure values, and sends the mirror images to the image processing module through the wireless communication module.
Optionally, the data processing module is specifically configured to:
after receiving the coordinate position of the heliostat to be detected and the current position of the unmanned aerial vehicle, determining a detection point of the heliostat to be detected and heliostat angle data according to a preset rule, and respectively sending the data to the unmanned aerial vehicle and a heliostat control module;
after the mirror surface condensation intensity distribution of the image processing module is received, the condensation efficiency value of the measured heliostat is calculated in a fitting mode according to the intensity distribution of the mirror surface condensation effect under different exposure values.
Optionally, the preset rule includes:
setting the distance between the heliostat to be detected and the detection point to be equal to the distance between the heliostat to be detected and a heat absorber of the tower type photo-thermal power station;
the distance between the current position of the unmanned aerial vehicle and the detection point is a preset minimum value;
and after the sunlight is reflected by the heliostat to be detected, the reflected light passes through the detection point.
Optionally, the number of drones is N; wherein N is a natural number greater than 0.
Optionally, if the number of the drones is greater than 1, the data processing module is further configured to:
after a detection point of the heliostat to be detected is obtained, judging whether the detection point has position conflict with the current positions of other unmanned aerial vehicles;
and if the position conflict exists, re-determining the detection point of the heliostat to be detected and heliostat angle data according to a preset rule.
In a second aspect, the invention provides a method for detecting heliostat condensing efficiency, which applies the system for detecting heliostat condensing efficiency of any one of the first aspect to perform detection of heliostat condensing efficiency.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with a system for detecting the condensing efficiency of the heliostat by using a spontaneous light source, the system adopts sunlight as a detection light source, does not use other light sources, and effectively avoids the influence of light pollution on the daily work of a heliostat field because the detection points are not concentrated on a heat absorption tower;
2. compared with the traditional scheme that a cloud deck camera is built near a heat absorber on a heat absorption tower to detect the condensation efficiency of the heliostat, the unmanned aerial vehicle capable of freely changing flight postures is adopted to replace a cloud deck with higher cost, and the distance between a point to be detected and the heliostat is adjusted to be equal to the distance between the heat absorber and the heliostat, so that the detection result is close to the actual working condensation efficiency value of the heliostat to the maximum extent, and the detection result is more accurate.
3. The invention can be provided with a plurality of unmanned aerial vehicles, realizes the simultaneous detection of a plurality of detection points and a plurality of heliostats above the mirror field, greatly improves the heliostat detection efficiency of the large-area mirror field, has convenient detection process and is suitable for popularization.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of an application scenario of the present invention;
FIG. 2 is a schematic structural diagram of a heliostat light-gathering efficiency detection system provided by an embodiment of the invention;
fig. 3 is a flowchart of a method for detecting light condensing efficiency of a heliostat according to an embodiment of the present invention.
In the figure, 101-a heat absorption tower of a tower type photothermal power station, 102-a heat absorber, 103-a heliostat and 104-an unmanned aerial vehicle.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Fig. 1 is a schematic diagram of an application scenario of the present invention, as shown in fig. 1, 101 is a heat absorption tower of a tower-type photothermal power station, 102 is a heat absorber at the top end of the heat absorption tower 101, 103 is a heliostat, and 104 is an unmanned aerial vehicle. The working principle of the tower type photo-thermal power station is that the heliostat 103 in a mirror field reflects sunlight to the heat absorption tower 101 in a concentrated manner, and the sunlight is absorbed by the heat absorber 102 at the top end of the heat absorption tower, so that the purpose of gathering solar energy is realized, and then working media are heated and a turbine generator is driven to generate electricity. The heliostats 103 in the mirror field can track the sun in real time under the mirror field control system, and reflect sunlight to a specific direction, usually to the heat absorber 102 on the heat absorption tower 101 of the tower-type photothermal power station. The heliostat light-gathering efficiency is an important factor influencing the efficiency of the tower-type solar power station, so that the heliostat light-gathering efficiency is required to be used as an important performance index in the heliostat design stage, and the index is tracked in real time in the assembling, debugging, verifying and operating stages of the heliostat so as to ensure the optical efficiency of the whole heliostat field.
In order to accurately detect the light condensation efficiency of each heliostat in a heliostat field, the working distance from an unmanned aerial vehicle to the heliostat is considered to be the distance d between the heliostat and a heat absorber of a heat absorption tower, so that the distance d between a detection point and the heliostat is ensured when the detection point is calculated. Meanwhile, the heliostat is required to be capable of accurately reflecting sunlight to the image acquisition module on the unmanned aerial vehicle, so that the incident angle and the emergent angle of light are equal and are both alpha, and then the posture of the heliostat can be calculated according to the current sun direction. When the heliostat rotates to the detection attitude, and the unmanned aerial vehicle moves to the detection point, the image acquisition module can acquire the mirror image. In order to realize accurate acquisition of images, a GPS positioning module of the detection system can provide current space coordinates and postures, and the postures of the system are adjusted according to the positions of the heliostats, so that a camera visual axis of the image acquisition module points to the heliostat to be detected. Because the mirror surface directly reflects sunlight and has a light condensation effect due to the mirror surface type structure, in the collected image, the bright part in the mirror surface area reflects the good light condensation effect of the area, the ratio of the bright area of the image to the mirror surface area is calculated to obtain the light condensation parameter C under the exposure value, and the light condensation parameter C under a group of preset exposure values i is obtained by adjusting the exposure value of the image collection module cameraiAnd comparing the ideal value C ' with an ideal value C ' obtained by a simulation algorithm 'iAnd finally, obtaining the average value of the ratio of the group, namely obtaining the condensation efficiency of the heliostat to be measured:
fig. 2 is a schematic structural diagram of a system for detecting light condensing efficiency of a heliostat according to an embodiment of the present invention, as shown in fig. 2, the system includes a heliostat control module, an image acquisition module, an image processing module, a data processing module, a wireless communication module, and a GPS positioning module, where:
the image acquisition module comprises a high-definition camera with a multi-gear adjustable exposure value, the image processing module has the functions of denoising and filtering the acquired image, the facula outline in the image can be fitted to identify the facula area, the data processing module has the function of generating heliostat light condensation efficiency numerical values by means of data fitting operation obtained by the data processing module, the image acquisition module is provided with the functions of time-based, specific heliostat mapping coordinate points, target coordinate points to be reflected, the corner angle of the heliostat to be detected is calculated, the heliostat attitude is controlled by sending the data to a heliostat field control system, the wireless communication module completes the communication function between the modules, the GPS positioning module completes the positioning and attitude identification of the unmanned aerial vehicle, and then the movement route is calculated.
And the heliostat control module can control the posture of the heliostat by issuing a corner angle.
Preferably, the drone may be plural. At this time, the data processing module is further configured to: after a detection point of the heliostat to be detected is obtained, whether the detection point conflicts with the current positions of other unmanned aerial vehicles or not is judged; and if the position conflict exists, re-determining the detection point of the heliostat to be detected and heliostat angle data according to a preset rule.
Fig. 3 is a flowchart of a method for detecting light condensing efficiency of a heliostat according to an embodiment of the present invention, and as shown in fig. 3, the detection system includes the following steps:
1) the heliostat control module is started, a heliostat list to be detected is selected, the heliostat list to be detected can be loaded according to the needs of a user, the detection system can optimize the detection sequence, and the condensation efficiency detection is carried out in sequence;
2) starting the unmanned aerial vehicle, and acquiring the heliostat to be tested through the wireless communication module;
3) the unmanned aerial vehicle carries out GPS self-check through a GPS positioning system to obtain the current coordinate and flight attitude;
4) according to the obtained coordinates of the heliostat to be measured, calculating a proximity detection point and a heliostat corner angle through a data processing module, and sending the detection point to a heliostat control module through a wireless communication module; when a plurality of unmanned aerial vehicles are available, the data processing module is further used for judging whether the detection points conflict with the detection points currently detecting other unmanned aerial vehicles, if so, the step is repeated, and if not, the step is continued;
5) the wireless communication module sends the corner angle of the heliostat to the heliostat control module, the corner angle is issued through the heliostat control module, the posture of the heliostat is further adjusted, meanwhile, the unmanned aerial vehicle flies to a detection point, and the heliostat reflects sunlight to the image acquisition module;
6) the unmanned aerial vehicle collects heliostat mirror images under different exposure values through an image collecting module;
7) the unmanned aerial vehicle processes the acquired image through the image processing module to obtain the condensation intensity distribution of the heliostat mirror surface;
8) and calculating the condensation efficiency of the measured heliostat according to the condensation intensity distribution of the heliostat mirror surface through the data processing module to finish detection, and recording and storing the condensation efficiency.
It should be noted that, the steps in the method for detecting the heliostat light-gathering efficiency provided by the present invention may be implemented by using corresponding modules, devices, units, etc. in the system for detecting the heliostat light-gathering efficiency, and those skilled in the art may refer to the technical scheme of the system to implement the step flow of the method, that is, the embodiments in the system may be understood as preferred examples of the implementation method, and are not described herein again.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. The utility model provides a detection system of heliostat spotlight efficiency which characterized in that, is applied to in tower light and heat power station mirror field, includes: the heliostat control module, the data processing module, the image acquisition module, the image processing module, the wireless communication module and the GPS positioning module; wherein: the image acquisition module, the wireless communication module and the GPS positioning module are all arranged on the unmanned aerial vehicle;
the heliostat control module is used for determining a heliostat to be detected in a mirror field of the tower type photo-thermal power station, and generating a heliostat angle rotation control instruction according to heliostat angle data generated by the data processing module so as to enable the heliostat to be detected to rotate to a preset angle;
the data processing module is used for determining a detection point of the heliostat to be detected and heliostat angle data according to the current position of the unmanned aerial vehicle; calculating the condensation efficiency of the heliostat to be measured according to the mirror surface condensation intensity distribution of the heliostat to be measured;
the image acquisition module is used for acquiring mirror images of the heliostat to be detected under different exposure values at a detection point and sending the mirror images to the image processing module for image processing through the wireless communication module;
the image processing module is used for processing the mirror surface image acquired by the image acquisition module to obtain mirror surface condensation intensity distribution of the heliostat to be detected;
the wireless communication module is used for realizing data communication between the unmanned aerial vehicle and the heliostat control module, the data processing module, the image acquisition module, the image processing module and the GPS positioning module;
and the GPS positioning module is used for executing positioning of the unmanned aerial vehicle and determining the current flight attitude of the unmanned aerial vehicle.
2. The heliostat light collection efficiency detection system of claim 1, wherein the heliostat control module is specifically configured to:
determining a heliostat to be detected in a mirror field of a tower type photo-thermal power station, and sending the coordinate position of the heliostat to be detected to a data processing module;
and generating a heliostat angle rotation control instruction after receiving heliostat angle data generated by the data processing module, so that the heliostat to be detected rotates to a preset angle, and sending an in-place signal to the unmanned aerial vehicle through the wireless communication module.
3. The heliostat light collection efficiency detection system of claim 1, wherein the drone is specifically configured to:
positioning the unmanned aerial vehicle according to a GPS positioning module, and sending the current position of the unmanned aerial vehicle to the data processing module through the wireless communication module;
after receiving the detection points sent by the data processing module, flying to the detection points;
after receiving the in-place signal sent by the heliostat control module, the image acquisition module acquires mirror images of the heliostat to be detected under different exposure values, and sends the mirror images to the image processing module through the wireless communication module.
4. The heliostat light collection efficiency detection system of claim 1, wherein the data processing module is specifically configured to:
after receiving the coordinate position of the heliostat to be detected and the current position of the unmanned aerial vehicle, determining a detection point of the heliostat to be detected and heliostat angle data according to a preset rule, and respectively sending the data to the unmanned aerial vehicle and a heliostat control module;
after the mirror surface condensation intensity distribution of the image processing module is received, the condensation efficiency value of the measured heliostat is calculated in a fitting mode according to the intensity distribution of the mirror surface condensation effect under different exposure values.
5. The heliostat condensing efficiency detection system according to claim 4, wherein the preset rules comprise:
setting the distance between the heliostat to be detected and the detection point to be equal to the distance between the heliostat to be detected and a heat absorber of the tower type photo-thermal power station;
the distance between the current position of the unmanned aerial vehicle and the detection point is a preset minimum value;
and after the sunlight is reflected by the heliostat to be detected, the reflected light passes through the detection point.
6. A heliostat light collection efficiency detection system according to any of claims 1-5, wherein the number of drones is N; wherein N is a natural number greater than 0.
7. The heliostat light concentration efficiency detection system of claim 6, wherein if the number of unmanned aerial vehicles is greater than 1, the data processing module is further configured to:
after a detection point of the heliostat to be detected is obtained, judging whether the detection point has position conflict with the current positions of other unmanned aerial vehicles;
and if the position conflict exists, re-determining the detection point of the heliostat to be detected and heliostat angle data according to a preset rule.
8. A heliostat light-gathering efficiency detection method is characterized in that the heliostat light-gathering efficiency detection system of any one of claims 1 to 7 is applied to perform heliostat light-gathering efficiency detection.
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| CN110398233B (en) * | 2019-09-04 | 2021-06-08 | 浙江中光新能源科技有限公司 | Heliostat field coordinate mapping method based on unmanned aerial vehicle |
| CN110763164B (en) * | 2019-12-19 | 2021-04-06 | 浙江中控太阳能技术有限公司 | Heliostat pasting piece assembling detection and self-adaptive adjustment system and method |
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