阅读说明：本技术 一种槽式抛物面集热器拦截率检测系统、方法及设备 (System, method and equipment for detecting interception rate of trough type parabolic heat collector ) 是由 邬峰 刘新龙 仇韬 赵晓辉 王伟 张文涛 李戈 于 2020-11-23 设计创作，主要内容包括：本发明公开一种槽式抛物面集热器拦截率检测系统、方法及设备,包括遮光板、图像获取模块、图像处理模块和数据处理模块,遮光板中部开设通孔,通孔的直径大于集热管的外径,遮光板上设有辅助参考线,辅助参考线包括一组公共点为集热管中心的间隔为预设角度的共点射线、外圆和内圆,外圆和内圆中间的环形部分为检测区域；遮光板安装在集热管支架上,遮光板与集热管的轴线垂直,通过检测装置对集热器反射的光线进行投影从而对集热管拦截效率进行观测；通过辅助参考线对集热管拦截率进行量化；本发明解决了采用槽式抛物面集热器的光热电站在安装及运维的过程中集热器拦截率难以准确获得的问题,提高了施工效率,保证了集热器运行在最佳工作状态。(The invention discloses a detection system, a method and equipment for the interception rate of a trough-type parabolic heat collector, wherein the detection system comprises a light shielding plate, an image acquisition module, an image processing module and a data processing module, wherein a through hole is formed in the middle of the light shielding plate, the diameter of the through hole is larger than the outer diameter of a heat collecting tube, an auxiliary reference line is arranged on the light shielding plate, the auxiliary reference line comprises a group of concurrent rays, an outer circle and an inner circle, the common points of which are the centers of the heat collecting tubes, and the interval is a preset angle, and an annular; the light shielding plate is arranged on the heat collecting tube support and is vertical to the axis of the heat collecting tube, and the light reflected by the heat collector is projected through the detection device so as to observe the interception efficiency of the heat collecting tube; quantifying the interception rate of the heat collecting pipe through an auxiliary reference line; the invention solves the problem that the interception rate of the heat collector is difficult to obtain accurately in the process of installation, operation and maintenance of the photo-thermal power station adopting the trough-type parabolic heat collector, improves the construction efficiency and ensures that the heat collector operates in the optimal working state.)

1. The detection system for the interception rate of the trough parabolic collector is characterized by comprising a light screen (1), an image acquisition module, an image processing module and a data processing module, wherein a through hole is formed in the middle of the light screen (1), the diameter of the through hole is larger than the outer diameter of a heat collecting tube (6), an auxiliary reference line is arranged on the light screen (1), the auxiliary reference line comprises a group of concurrent rays (12), an outer circle (13) and an inner circle (14), the common points of the concurrent rays are the centers of the heat collecting tubes, the interval of the concurrent rays is a preset angle, and the annular part between the outer circle (13) and the inner circle (14) is a; the shading plate (1) is arranged on the heat collecting tube bracket (5), the shading plate (1) is vertical to the axis of the heat collecting tube (6), and the image acquisition module is used for acquiring an oblique view of the surface of the shading plate (1); the image processing module is used for adjusting the oblique view of the surface of the shading plate into a front view through image affine transformation; the front view of the light shielding plate is subjected to region segmentation to obtain an incident region image and an overflow region, the image data processing module is used for analyzing the incident region image and the overflow region image to obtain an incident region brightness sequence and an overflow region brightness sequence, the average value of all pixel brightness values in an environment brightness region is obtained, and the heat collecting tube interception rate is calculated according to an interception rate calculation formula.

2. The system for detecting the interception rate of the trough parabolic collector according to claim 1, wherein the light shielding plate (1) is provided with a rectangular groove (11), and the width of the rectangular groove (11) is the same as the outer diameter of the heat collecting tube (6); embedding auxiliary baffle (2) in rectangular channel (11), auxiliary baffle (2) and the junction in rectangular channel set up limit structure.

3. The system for detecting the interception rate of the trough parabolic collector according to claim 1, wherein a positioning hole (3) is formed at the joint of the auxiliary baffle (2) and the rectangular trough, a fixing buckle (4) is arranged in the positioning hole (3), and a positioning pin is arranged on the surface of the fixing buckle and inserted into the positioning hole (3).

4. The system for detecting the interception rate of a trough parabolic collector according to claim 1, wherein the lower portion of the light shielding plate (1) is connected to the collector tube holder (5) by bolts.

5. A method for detecting the interception rate of a trough type parabolic heat collector is characterized by comprising the following steps:

s1, obtaining an oblique view of the surface of the shading plate collected by the image detection device, and carrying out affine transformation on the oblique view according to a first definite value to obtain a front view of the shading plate;

the first fixed value is a relative coordinate of the image acquisition device relative to the center of the shading plate, comprises a horizontal distance, a vertical distance and an axial distance along the direction of the heat collecting pipe, and is an input parameter of the affine transformation module;

s2, carrying out region segmentation on the front view of the shading plate to obtain an incident region image and an overflow region image;

s3, analyzing the images of the incident area and the overflow area respectively by means of an image HSV (hue, saturation, value) analysis algorithm to obtain an incident area brightness sequence and an overflow area brightness sequence;

s4, respectively processing data of the incident area brightness sequence and the overflow area brightness sequence; according to a preset threshold value, marking the brightness value of the pixel point with the brightness value lower than the threshold value in the brightness sequence as the ambient brightness, and marking the brightness value of the pixel point with the brightness value higher than the threshold value as the effective brightness; calculating the average value of all pixel brightness values in the environment brightness area, and recording as L_sur；

S5, calculating the interception rate as follows:

the method for calculating the interception rate Int of the heat collecting pipe comprises the following steps:

6. the method for detecting the interception rate of a trough parabolic collector according to claim 1, wherein the method for acquiring the collected image comprises the following steps:

arranging a high-resolution image acquisition device at an axial fixed position of the heat collecting tube, and shooting the light screen to obtain an oblique view of the surface of the light screen; and recording the relative coordinates between the image acquisition device and the heat collecting tube.

7. The method for detecting the interception rate of a trough parabolic collector according to claim 1, wherein in S2, the front view of the light-shielding plate is divided by using an inner circle and an outer circle of an auxiliary reference line on the light-shielding plate as a boundary line, the area between the inner circle and the outer circle is an effective detection area, the upper half of the effective detection area is an overflow light detection area, and the lower half of the effective detection area is an incident light detection area.

8. The method for detecting the interception rate of the trough parabolic collector according to claim 1, wherein in S3, an HSV analysis method is adopted to analyze all pixel points in the image, so as to obtain the brightness values of all pixel points, wherein the brightness values range from 0 to 255, and form a brightness sequence of all pixel points.

9. A computer apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of the trough parabolic collector intercept rate detection method according to any one of claims 5 to 8.

10. A computer-readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the trough parabolic collector intercept rate detection method according to any one of claims 5 to 8.

Technical Field

The invention belongs to the technical field of solar thermal power generation, and relates to a system, a method and equipment for detecting the interception rate of a trough-type parabolic heat collector.

Background

In a parabolic collector trough type solar thermal power station which is put into commercial application at present, after a collector is installed, tracking parameters need to be corrected according to the interception rate of a collector tube, so that the collector can work in the best state. The existing detection method needs to arrange a complex and expensive optical detection device to detect the interception rate of the heat collecting tube, and the comprehensive cost is too high, so that the method is not beneficial to large-scale application in engineering.

Conventionally, the adjustment is performed empirically by a field technician through visual inspection, and this mode has two problems: 1. during detection, the heat collecting tube needs to be in a state of tracking the sun, and at the moment, sunlight is focused at the heat collecting tube, so that a reference object is difficult to set, and the measurement result is difficult to quantify; 2. the adjustment precision of the interception rate of the heat collecting tube often reaches the level of 0.1 degree, the accuracy of the heat collecting tube is difficult to guarantee by means of visual measurement for adjustment, and meanwhile, the technical popularization and application are not facilitated.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a detection system, a method and equipment for the interception rate of a trough-type parabolic heat collector; the detection device which is easy to manufacture and can be recycled and a set of interception rate calculation method based on the detection device are provided in consideration of the situations that a reference object cannot be set in the actual detection process of the interception rate of the trough parabolic heat collector, the interception rate is difficult to quantify and the popularization and application are difficult.

The invention is realized by the following technical scheme: a trough parabolic collector interception rate detection system comprises a light screen, an image acquisition module, an image processing module and a data processing module, wherein a through hole is formed in the middle of the light screen, the diameter of the through hole is larger than the outer diameter of a heat collecting tube, an auxiliary reference line is arranged on the light screen, the auxiliary reference line comprises a group of concurrent rays, an outer circle and an inner circle, common points of which are the centers of the heat collecting tubes and are spaced at a preset angle, and an annular part between the outer circle and the inner circle is a detection area; the light screen is arranged on the heat collecting tube support, the light screen is vertical to the axis of the heat collecting tube, and the image acquisition module is used for acquiring an oblique view of the surface of the light screen; the image processing module is used for adjusting the oblique view of the surface of the shading plate into a front view through image affine transformation; the front view of the light shielding plate is subjected to region segmentation to obtain an incident region image and an overflow region, the image data processing module is used for analyzing the incident region image and the overflow region image to obtain an incident region brightness sequence and an overflow region brightness sequence, the average value of all pixel brightness values in an environment brightness region is obtained, and the heat collecting tube interception rate is calculated according to an interception rate calculation formula.

The shading plate is provided with a rectangular groove, and the width of the rectangular groove is the same as the outer diameter of the heat collecting pipe; embedding auxiliary baffle in the rectangular channel, the junction of auxiliary baffle and rectangular channel sets up limit structure.

The auxiliary baffle plate and the rectangular groove are connected through a positioning hole, a fixing buckle is arranged in the positioning hole, a positioning pin is arranged on the surface of the fixing buckle, and the positioning pin is inserted into the positioning hole.

The lower part of the shading plate is connected with the heat collecting pipe bracket through a bolt.

A method for detecting the interception rate of a trough type parabolic heat collector comprises the following steps:

s1, obtaining an oblique view of the surface of the shading plate collected by the image detection device, and carrying out affine transformation on the oblique view according to a first definite value to obtain a front view of the shading plate;

the first fixed value is a relative coordinate of the image acquisition device relative to the center of the shading plate, comprises a horizontal distance, a vertical distance and an axial distance along the direction of the heat collecting pipe, and is an input parameter of the affine transformation module;

s2, carrying out region segmentation on the front view of the shading plate to obtain an incident region image and an overflow region image;

s3, analyzing the images of the incident area and the overflow area respectively by means of an image HSV (hue, saturation, value) analysis algorithm to obtain an incident area brightness sequence and an overflow area brightness sequence;

s4, respectively processing data of the incident area brightness sequence and the overflow area brightness sequence; according to a preset threshold value, marking the brightness value of the pixel point with the brightness value lower than the threshold value in the brightness sequence as the ambient brightness, and marking the brightness value of the pixel point with the brightness value higher than the threshold value as the effective brightness; calculating the average value of all pixel brightness values in the environment brightness area, and recording as L_sur；

S5, calculating the interception rate as follows:

the method for calculating the interception rate Int of the heat collecting pipe comprises the following steps:

the acquisition method of the collected image comprises the following steps:

arranging a high-resolution image acquisition device at an axial fixed position of the heat collecting tube, and shooting the light screen to obtain an oblique view of the surface of the light screen; and recording the relative coordinates between the image acquisition device and the heat collecting tube.

In S2, the front view of the light shielding plate is divided by using the inner circle and the outer circle in the auxiliary reference line on the light shielding plate as a boundary line, the area between the inner circle and the outer circle is an effective detection area, the upper half of the effective detection area is an overflow light detection area, and the lower half of the effective detection area is an incident light detection area.

In S3, analyzing all pixel points in the image by adopting an HSV analysis method to obtain the brightness values of all the pixel points, wherein the brightness value range is 0-255, and the brightness sequence of all the pixel points is formed.

A computer device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, said processor when executing said computer program implementing steps such as a trough parabolic collector intercept rate detection method.

A computer-readable storage medium, storing a computer program which, when executed by a processor, implements the steps of a trough parabolic collector intercept rate detection method.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention provides a detection system for the interception rate of a trough parabolic collector, which is characterized in that light rays reflected to a heat collecting tube from a collector mirror surface and light rays not intercepted by the heat collecting tube can be clearly projected on a light shielding plate to be displayed through a diffuse reflection light shielding plate arranged perpendicular to the heat collecting tube, and the interception rate of the collector is detected under the condition of not erecting a complex optical detection device; the main structure of the detection system is a light screen made of a rectangular diffuse reflection surface metal plate, and a reference line is drawn on the surface of the light screen to assist in judging the interception rate so as to solve the problem that the interception rate is difficult to quantify; based on the detection device, the light screen and the auxiliary baffle in the detection system provided by the invention are simple to manufacture, and the materials are easy to obtain and can be repeatedly used;

based on the detection method of the system, the images projected on the light screen and the auxiliary baffle are obtained, and the influence of reflection on the measurement result under the condition of low cleanliness of the heat collecting tube is weakened in a mode of dividing the images by arranging the inner circle and the outer circle on the light screen; the influence of the ambient light on the result is weakened by introducing the ambient light intensity to distinguish the pixel points in the data processing link, and the construction efficiency and the operation precision of the trough parabolic heat collector can be effectively improved by adopting the method; the detection method has simple calculation steps, and can accurately obtain the interception rate of the heat collecting tube under the condition of not carrying out large amount of calculation; therefore, the method is more suitable for being applied to projects, can effectively improve the construction efficiency and indirectly improve the heat collection efficiency of the heat collector, and meanwhile, the two methods of estimation and accurate calculation can meet the precision requirement in most projects; the interception rate of the heat collecting pipe can be accurately detected without depending on a complex and expensive optical device.

Drawings

FIG. 1 is a schematic view of a light shielding plate of an interception rate detecting apparatus according to an embodiment of the present invention.

Fig. 2 is a schematic view of processing an auxiliary baffle of the interception rate detection apparatus according to the embodiment of the present invention.

Fig. 3 is a schematic view illustrating a process of fixing a buckle of the interception rate detection apparatus according to the embodiment of the present invention.

Fig. 4 is an assembly diagram of an interception rate detection apparatus according to an embodiment of the present invention.

Fig. 5 is a schematic view of the interception rate detection apparatus according to the embodiment of the present invention.

Fig. 6 is a block diagram of an image processing module of the interception rate detection method according to an embodiment of the present invention.

Fig. 7 is a block diagram of a data processing module of an interception rate detection method according to an embodiment of the present invention.

In the attached drawing, 1-a shading plate, 2-an auxiliary baffle, 3-a positioning hole, 4-a fixing buckle, 5-a heat collecting pipe bracket, 6-a heat collecting pipe, 11-a rectangular groove, 12-a concurrent ray, 13-an excircle and 14-an inner circle.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.

Referring to fig. 1, a groove type parabolic heat collector interception rate detecting system, including light screen 1, supplementary baffle 2 and fixed buckle, light screen 1 adopts diffuse reflection surface rectangle metal sheet to make, the through-hole is seted up at light screen 1 middle part, the diameter of through-hole is greater than the external diameter of thermal-collecting tube 6, its surface is drawn supplementary reference line, set up rectangular channel 11 on the light screen 1, embedding supplementary baffle 2 in the rectangular channel 11, supplementary baffle 2 and the 11 junction of rectangular channel set up locating hole 3, set up locating pin or screw in the locating hole 3, set up the locating hole on the fixed buckle 4, fixed buckle 4 sets up at supplementary baffle 2 and rectangular channel junction, fixed buckle 4 is used for connecting light screen 1 and supplementary baffle 2, still be used for connecting light screen 1, supplementary baffle 2 and thermal-collecting tube support 5.

Specifically, the auxiliary reference line is drawn by adopting a diffuse reflection high-temperature resistant coating, the auxiliary reference line comprises a group of concurrent rays 12 with common points as the centers of the heat collecting tubes and 5-degree intervals, an outer circle 13 and an inner circle 14, and an annular part between the outer circle 13 and the inner circle 14 is a detection area.

Referring to fig. 2, an interception rate detecting system for a trough parabolic collector is disclosed, in which an auxiliary baffle 2 and a light shielding plate 1 are made of the same material, so as to fix the light shielding plate 1 on a heat collecting tube and a support thereof.

Referring to fig. 3, in the detection system for the interception rate of the trough parabolic collector, at least two positioning holes 3 are formed in the same position of the joint of an auxiliary baffle 2 and a light shielding plate 1, the light shielding plate and the auxiliary baffle are connected through a fixing buckle 4, and as an optional embodiment, the positioning holes at the bottom are also used for connecting the auxiliary baffle 2 and the light shielding plate 1 with a heat collecting tube support 5.

Referring to fig. 4, in the interception rate detection system of the trough parabolic collector, an auxiliary baffle 2 and a light-shielding plate 1 are installed perpendicular to a heat collecting tube, so that the cross sections of the light-shielding plate 1, the auxiliary baffle 2 and the heat collecting tube 6 form a complete rectangle.

Referring to fig. 5, a trough parabolic collector interception rate detection system is fixed by using a fastener and a positioning hole 3, and a positioning pin or a bolt is disposed in the positioning hole 3 to fix a detection device on a collector tube support 5.

The specific implementation is as follows:

step 1, a fixed interception rate detection device is arranged at the vertical surface of a heat collecting tube to intercept light reflected by the heat collecting tube, and after the light is intercepted by the detection device, light absorbed by the heat collecting tube and overflowing light can be observed on a light shielding plate;

specifically, the method for observing the light rays absorbed and overflowed by the heat collecting tube on the light shielding plate comprises the following steps: the shading plate is made of a rectangular metal plate with a diffuse reflection surface and is fixed perpendicular to the heat collecting tubes, the heat collector is reflected to the shading plate at the heat collecting tubes to be intercepted, and the projection of reflected light is formed at the shading plate.

Step 2, drawing an interception rate auxiliary reference line on the surface of the light shield, wherein the interception rate auxiliary reference line is used for assisting in judging the relative positions of the heat collecting tube intercepted light rays and the overflowing light rays and the heat collecting tube;

specifically, the drawn interception rate reference line is a group of concentric rays which are uniformly distributed and used for assisting in judging the relative positions of the heat collecting tube intercepted light rays and the overflowing light rays and the heat collecting tube, and the common point of the interception rate reference line and the overflowing light rays is the center line of the heat collecting tube;

step 3, fixing the shading plate through the auxiliary baffle plate so that the shading plate does not generate relative displacement; the mode that the light screen plate is fixed is as follows: the auxiliary baffle and the shading plate are connected through a buckle and are fixed on the heat collector support;

and 4, enabling the heat collector to be in an automatic tracking state, observing the projection of the reflected light on the light shielding plate along the axial direction of the heat collecting tube, and estimating the interception rate of the heat collector.

Specifically, the method for estimating the interception rate of the heat collecting tube according to the reference coordinate system in the step 4 is as follows:

step 4.1, fixing the light screen on the heat collecting tube and the heat collecting tube support through an auxiliary baffle and a fixing buckle, adjusting the positions of the auxiliary baffle and the buckle to enable the center line of the heat collecting tube support to coincide with the center line of the light screen, and locking the fixing buckle to enable the light screen and the heat collecting tube not to generate relative displacement;

step 4.2, enabling the heat collector to enter a working mode of tracking the sun;

4.3, after the heat collector faces the sun, recording coordinates of two sides of the boundary of an incident light spot at the lower part of the shading plate, respectively recording the coordinates as In1 and In2, recording the width of an overflow light spot at the upper part of the shading plate In a reference line, recording the width as Ov, and comparing the brightness of the incident light spot and the brightness of the overflow light spot to obtain a correction coefficient Cor;

step 4.4, the calculation method of the interception rate Int of the heat collecting pipe at the current angle comprises the following steps:

step 5, acquiring images projected by the reflected light on the light shading plate and the auxiliary baffle through an image acquisition device; specifically, the method for acquiring the image comprises the following steps:

arranging a high-resolution image acquisition device at an axial fixed position of the heat collecting tube, and shooting the light screen to obtain an oblique view of the surface of the light screen; recording relative coordinates between the image acquisition device and the heat collection tube;

6, accurately calculating the interception rate of the heat collecting tube based on an image processing technology according to the projection image acquired in the step 5;

performing affine transformation on the image acquired in the step S5 according to the relative coordinates between the image acquisition device and the heat collection tube to obtain a front view of the light shielding plate;

performing area segmentation on the front view of the shading plate to obtain an incident ray detection area image and an overflow ray detection area image;

the detection area is an area between the inner circle and the outer circle of the shading plate, the upper half part of the detection area is an overflow light ray detection area, and the lower half part of the detection area is an incident light ray detection area;

traversing all pixel points in the overflow ray detection area and the incident ray detection area, and performing HSV analysis on the pixel points to obtain the brightness value of each pixel, wherein the brightness value range is 0-255;

judging the brightness sequence of the overflow light ray area and the incident light ray area, if the brightness value is higher than a set threshold value, judging the areas as effective detection areas, and the areas smaller than the threshold value are environment brightness areas;

calculating the average value of all pixel brightness values in the environment brightness area, and recording as L_sur；

The method for calculating the interception rate Int of the heat collecting pipe comprises the following steps:

wherein L is_out,iAnd L_in,jThe brightness values of the pixel points in the overflow area and the incident area are respectively, m is the number of the pixel points in the overflow area, and n is the number of the pixel points in the incident area.

Referring to fig. 6, the image processing method for detecting the interception rate of the trough parabolic collector includes the following steps:

s1, obtaining an oblique view of the surface of the shading plate acquired by the image detection device, and carrying out affine transformation on the oblique view to obtain a front view of the shading plate;

the first fixed value is a relative coordinate of the image acquisition device relative to the center of the shading plate, comprises a horizontal distance, a vertical distance and an axial distance along the direction of the heat collecting pipe, and is an input parameter of the affine transformation module;

and S2, carrying out region segmentation on the front view of the shading plate to obtain an incident region image and an overflow region image.

Specifically, the front view of the light screen is divided by taking an inner circle and an outer circle in an auxiliary reference line on the light screen as boundary lines, the area between the inner circle and the outer circle is an effective detection area, the upper half part of the effective detection area is an overflow light detection area, and the lower half part of the effective detection area is an incident light detection area;

and S3, analyzing the incident area image and the overflow area image respectively by means of an image HSV (hue, saturation and value) analysis algorithm to obtain an incident area brightness sequence and an overflow area brightness sequence.

Specifically, an HSV analysis method is adopted to analyze all pixel points in the image to obtain the brightness values of all the pixel points, the range of the brightness values is 0-255, and the brightness sequence of all the pixel points is formed.

Referring to fig. 7, the data processing method for detecting the interception rate of the trough parabolic collector includes the following steps:

a. respectively processing data of the incident area brightness sequence and the overflow area brightness sequence to eliminate the influence of ambient light on the measurement result;

specifically, the data processing method comprises the following steps: according to a preset threshold value, the brightness value of the pixel point with the brightness value lower than the threshold value in the brightness sequence is marked as the ambient brightness, and the brightness value of the pixel point with the brightness value higher than the threshold value is marked as the effective brightness.

The second fixed value is a threshold value in the data processing process, which is an environmental brightness value in the effective detection area, and is selected according to visual inspection because the brightness of incident light and reflected light is obviously different from the environmental brightness under normal conditions.

b. And calculating the interception rate according to an interception rate calculation formula.

Specifically, the calculation formula of the heat collecting tube interception rate Int is as follows:

the average of all pixel intensity values, denoted as L, is found_sur；

Wherein L is_out,iAnd L_in,jThe brightness values of the pixel points in the overflow area and the incident area are respectively, m is the number of the pixel points in the overflow area, and n is the number of the pixel points in the incident area.

According to the detection system for the interception rate of the trough parabolic heat collector, the light shield is adopted to project the light reflected by the mirror surface of the heat collector, so that the light captured by the heat collection tube and the overflowing light in the solar light reflected by the heat collector can be clearly displayed on the light shield, and the interception rate of the heat collection tube can be visually observed without adding special detection equipment. Meanwhile, in order to quantify the interception rate of the heat collecting tube, a calculation method based on an interception rate detection device is provided, an auxiliary reference line is arranged on a light shielding plate, and the interception rate of the heat collecting tube can be estimated by observing the position of the reflected light projected in a coordinate system of the auxiliary reference line; furthermore, the mode of carrying out image processing after carrying out image shooting on the shading plate can realize the calculation of the interception rate of the heat collecting tube.

The device and the method provided by the invention have the characteristics of easily obtained materials, simple manufacture and reusability, and meanwhile, the detection method based on image processing can accurately calculate the interception rate of the heat collecting tube, thereby ensuring the accuracy of the result. The achievement can be directly applied to the construction and operation and maintenance processes of the photo-thermal power station adopting the trough-type parabolic heat collector, the detection cost is reduced, and the working efficiency of the heat collector is effectively improved.

The invention discloses a detection system for the interception rate of a trough type parabolic heat collector, which comprises a light shielding plate, an auxiliary baffle plate and a fixed buckle processing schematic diagram, and comprises a detection device assembly schematic diagram and a fixed schematic diagram. The detection method comprises an image processing module and a data processing module. Projecting the light reflected by the heat collector through the detection device so as to observe the interception efficiency of the heat collection pipe; quantifying the interception rate of the heat collecting pipe through an auxiliary reference line; and further accurately calculating the interception rate by an image processing method. The invention provides a heat collector interception rate detection method which gives consideration to implementation difficulty and accuracy in practical application.

The interception rate calculation method can carry out quantitative analysis on the interception rate of the heat collecting tube under two conditions of estimation and accurate calculation; the detection method provided by the invention is divided into two modes of visual estimation and image identification accurate calculation, can be selected according to occasions with different accuracy requirements in actual use, and has strong adaptability.

The system and the method for detecting the interception rate of the trough parabolic heat collector are suitable for photo-thermal power stations adopting the trough parabolic heat collector.

The trough parabolic collector intercept rate detection method of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The method for detecting the interception rate of the trough-type parabolic heat collector can be stored in a computer readable storage medium if the method is realized in the form of a software functional unit and is sold or used as an independent product.

Based on such understanding, in the exemplary embodiment, a computer readable storage medium is also provided, all or part of the processes in the method of the above embodiments of the present invention can be realized by a computer program to instruct related hardware, the computer program can be stored in the computer readable storage medium, and when the computer program is executed by a processor, the steps of the above method embodiments can be realized. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. Computer-readable storage media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice. The computer storage medium may be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical memory (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (e.g., ROM, EPROM, EEPROM, nonvolatile memory (NANDFLASH), Solid State Disk (SSD)), etc.

In an exemplary embodiment, there is also provided a computer device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, said processor when executing said computer program implementing the steps of said trough parabolic collector intercept rate detection method. The processor may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.