CN211266846U

CN211266846U - High-precision double-shaft sun tracking system for concentrating solar cell

Info

Publication number: CN211266846U
Application number: CN202020089828.XU
Authority: CN
Inventors: 徐心海; 王梦盈; 崔建朋
Original assignee: Shenzhen Graduate School Harbin Institute of Technology
Current assignee: Shenzhen Graduate School Harbin Institute of Technology
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-08-14
Anticipated expiration: 2030-01-16

Abstract

The utility model provides a high accuracy spotlight solar cell biax sun tracker, including spotlight optical assembly, every single move axle subassembly, position axle subassembly and base, wherein, the position axle subassembly is installed on the base, the every single move axle subassembly is installed at the output of position axle subassembly, spotlight optical assembly installs the output of every single move axle subassembly. The utility model has the advantages that: the system precision and stability are improved, all-weather high-precision tracking of the system is guaranteed, and the cost is reduced.

Description

High-precision double-shaft sun tracking system for concentrating solar cell

Technical Field

The utility model relates to a photovoltaic power generation especially relates to a high accuracy spotlight solar cell biax sun-tracking system.

Background

The photovoltaic power generation solar cell (PV) can directly convert solar energy into electric energy, has reliable performance, is easy to be used commercially, and has the current trend of low power generation cost and large-scale popularization, so the development is fast. Although PV power generation currently accounts for 0.1% of global power generation, the International Energy Agency (IEA) predicts that PV power generation will reach 5% in 2030 and continue to increase to 11% in 2050. However, PV cells are subject to the properties of the materials and, although several generations of different technologies have been developed, their operating efficiency is still at a low level. Although the area receiving sunlight can be increased and the total output power can be increased by increasing the number of PV cells, this approach can greatly increase the economic cost of power generation. Concentrated Photovoltaic (CPV) technology has received increasing attention in order to increase the solar radiation received per unit area of cell without increasing the number of PV cells. The technique comprises three parts: three knot photovoltaic cell, optical component, tracking mechanism. The optical assembly is based on a reflection principle (such as a parabolic reflector) or a refraction principle (such as a Fresnel lens), and can focus 1000 times of sunlight to be projected on the triple-junction photovoltaic cell, so that the working efficiency of the CPV cell is greatly improved.

However, the CPV technology focuses sunlight at a high power, so that the requirement on the position of a focusing point for receiving light is very strict, if the sunlight deviates from the normal of the optical assembly, the received light intensity of the battery is severely reduced or even cannot be received, and the battery is burned out in a serious case. Therefore, the tracking device is required to be matched to realize all-weather high-precision tracking so as to ensure the normal work of the CPV system.

Existing sun tracking systems differ in mechanical structure, photoelectric sensors, etc. The mechanical structure mostly adopts a single-shaft or double-shaft structure, the single-shaft structure usually adopts east-west direction tracking, and the double-shaft structure usually adopts azimuth-pitching direction tracking. The photoelectric sensor mostly adopts a photosensitive device, and has simple structure and lower cost. The patent of publication number CN108490983A proposes a mechanical all-season sun tracker, which proposes a swing driving mechanism to solve the problem of misoperation caused by the influence of sunlight on the existing solar photoelectric tracking device, but the structure is complex, the accumulated error is large, and the mechanical all-season sun tracker is only suitable for photovoltaic power generation technology and not suitable for concentrated solar cell technology. The patent of publication No. CN109379028A proposes a small solar single-axis tracking support with simple structure and low cost, which is also only applicable to photovoltaic power generation technology and not applicable to concentrator solar cell technology. The patent of publication number CN108444503A proposes a large-range sun position tracking sensor, which uses the geometrical optics principle and uses a CCD camera to process the shadow, so that the accuracy is improved compared with the traditional sensor, but the length of the sundial is shorter, which limits the improvement of the accuracy of the sensor. The patent of publication No. CN110138326A proposes a novel dual-axis photovoltaic tracker, whose tracking strategy adopts photoresistor closed-loop tracking, whose control accuracy is limited by the sensor and is not suitable for all-weather tracking.

Therefore, how to provide a low-cost and high-precision tracking system is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a high-precision concentrating solar cell double-shaft sun tracking system and method.

The utility model provides a high accuracy spotlight solar cell biax sun tracker, including spotlight optical assembly, pitch axis subassembly, azimuth axis subassembly and base, wherein, the azimuth axis subassembly is installed on the base, the output at the azimuth axis subassembly is installed to the pitch axis subassembly, spotlight optical assembly installs the output of pitch axis subassembly, azimuth axis subassembly includes azimuth axis box and installs azimuth axis motor, azimuth axis worm gear mechanism in the azimuth axis box, the azimuth axis box is installed on the base, azimuth axis worm gear mechanism includes engaged with azimuth axis worm and azimuth axis worm wheel, azimuth axis motor with azimuth axis worm connects, azimuth axis worm wheel with the pitch axis subassembly is connected, the axis perpendicular to horizontal plane of azimuth axis worm wheel, the pitch axis subassembly includes the pitch axis box and installs pitch axis motor in the pitch axis box The optical fiber collecting device comprises a pitching shaft worm gear mechanism and a pitching shaft offset frame, wherein the pitching shaft box body is installed on an azimuth shaft worm gear, the pitching shaft worm gear mechanism comprises a pitching shaft worm and a pitching shaft worm gear which are meshed with each other, a pitching shaft motor is connected with the pitching shaft worm, the pitching shaft worm gear is connected with the pitching shaft offset frame, a light-gathering optical assembly is installed on the pitching shaft offset frame, and the axis of the pitching shaft worm gear is parallel to the horizontal plane.

As a further improvement, the spotlight optical assembly includes spotlight optical bracket component and installs fresnel lens, concave lens, four-quadrant silicon photocell sensor on the spotlight optical bracket component, spotlight optical bracket component is installed on the every single move axle off-set shelf, incident light warp focus on behind the fresnel lens concave lens is last, finally forms a branch of collimated light and shines on the four-quadrant silicon photocell sensor.

As a further improvement of the present invention, the high-precision concentrating solar cell dual-axis solar tracking system further comprises a microcontroller, a power supply module, an RTC module, a GPS module for obtaining the longitude and latitude of the current tracking system, and an IMU module for obtaining the attitude euler angle of the current base, wherein the output end of the GPS module is connected with the IMU module, the output end of the IMU module is connected with the microcontroller, the output end of the four-quadrant silicon photocell sensor is connected with the microcontroller, the power supply module is respectively connected with the RTC module, the microcontroller, an azimuth axis motor and a pitch axis motor, the output end of the RTC module is connected with the microcontroller, the microcontroller is connected with the azimuth axis motor through an azimuth axis motor driving unit, the azimuth axis motor is connected with the microcontroller through an azimuth axis encoder, the microcontroller is connected with the pitch axis motor through a pitch axis motor driving unit, the pitch shaft motor is connected with the microcontroller through a pitch shaft encoder.

As a further improvement, the azimuth axis subassembly still includes carries out the azimuth axis photoelectricity cell type sensor that the position was injectd and the zero-bit was markd to the azimuth axis, azimuth axis photoelectricity cell type sensor's output with microcontroller connects, the bottom of every single move axle box be equipped with the barred body that the cooperation of azimuth axis photoelectricity cell type sensor was used.

As a further improvement, the pitch axis assembly still includes the first pitch axis photoelectric cell type sensor and the second pitch axis photoelectric cell type sensor that carry out position limitation and zero-bit calibration to the pitch axis, first pitch axis photoelectric cell type sensor, second pitch axis photoelectric cell type sensor are installed respectively the both sides of pitch axis box, be equipped with on the pitch axis biasing frame with the receiving arrangement that first pitch axis photoelectric cell type sensor or second pitch axis photoelectric cell type sensor cooperation were used, first pitch axis photoelectric cell type sensor, second pitch axis photoelectric cell type sensor's output respectively with microcontroller connects.

As a further improvement of the utility model, the mounting position of the first pitch axis photoelectric cell type sensor and the horizontal plane form a 135 degree included angle, and the mounting position of the second pitch axis photoelectric cell type sensor and the horizontal plane form a-10 degree included angle.

As a further improvement of the present invention, the IMU module is mounted on the base.

As a further improvement of the present invention, the azimuth axis box body comprises an azimuth axis reduction box body, an azimuth axis reduction box end cover i and an azimuth axis reduction box end cover ii, both ends of the azimuth axis worm gear are respectively connected with the azimuth axis reduction box end cover i and the azimuth axis reduction box end cover ii through bearings, the azimuth axis reduction box end cover i and the azimuth axis reduction box end cover ii are respectively fixed on the azimuth axis reduction box body through bolts, the azimuth axis reduction box end cover i and the azimuth axis reduction box end cover ii are eccentric end covers, and the center distance between the azimuth axis worm and the azimuth axis worm gear is adjusted by adjusting the bolt hole positions corresponding to the azimuth axis reduction box end cover i and the azimuth axis reduction box end cover ii, so as to achieve the purpose of eliminating the worm gear meshing gap; the pitch shaft box body comprises a pitch shaft speed reduction box body, a pitch shaft speed reduction box end cover I and a pitch shaft speed reduction box end cover II, two ends of a pitch shaft worm gear are respectively connected with the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II through bearings, the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II are respectively connected with the pitch shaft speed reduction box body through bolts, the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II are eccentric end covers, and the center distance between the pitch shaft worm and the pitch shaft worm gear is adjusted by adjusting bolt hole positions corresponding to the pitch shaft speed reduction box body and the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II, so that the purpose of.

As a further improvement of the utility model, high accuracy spotlight solar cell biax sun tracker still includes the error calibration device, the error calibration device includes camera support, high definition camera, light section of thick bamboo support column, shadow receiving tray support, shadow receiving tray, light section of thick bamboo cover, a light section of thick bamboo and the hard tungsten rod of superfine height, high definition camera and light section of thick bamboo support column are installed respectively on the camera support, shadow receiving tray bearing installation is in on the light section of thick bamboo support column, shadow receiving tray installation is in on the shadow receiving tray support, the light section of thick bamboo cover is installed on the shadow receiving tray, the light section of thick bamboo is installed on the light section of thick bamboo cover, the hard tungsten rod of superfine height is located within the light section of thick bamboo, the axis of light section of thick bamboo cover, the positive center of shadow receiving tray, The ultra-thin high-hardness tungsten rod and the high-definition camera are arranged in a collinear manner.

As a further improvement of the present invention, the error calibration device or the condensing optical assembly is installed on the pitching axis offset frame of the pitching axis assembly.

The utility model has the advantages that: by the scheme, the precision and the stability of the system are improved, all-weather high-precision tracking of the system is guaranteed, and the cost is reduced.

Drawings

Fig. 1 is an axonometric view of the high-precision concentrating solar cell double-axis sun tracking system of the utility model.

Fig. 2 is an azimuth axis explosion diagram of the high-precision concentrating solar cell double-axis solar tracking system of the present invention.

Fig. 3 is an explosion view of the pitch axis of the high-precision concentrating solar cell dual-axis sun tracking system of the present invention.

Fig. 4 is an axonometric view of the concentrating optical component of the high-precision concentrating solar cell double-shaft solar tracking system.

Fig. 5 is a working schematic diagram of the concentrating optical component of the high-precision concentrating solar cell double-shaft sun tracking system of the present invention.

Fig. 6 is the utility model relates to a high accuracy spotlight solar cell biax sun tracking system's error calibration device axonometric drawing.

Fig. 7 is a hardware system block diagram of the high-precision concentrating solar cell dual-axis sun tracking system of the present invention.

Fig. 8 is an experimental error result diagram of the high-precision concentrating solar cell double-shaft sun tracking system.

Detailed Description

The present invention will be further described with reference to the following description and embodiments.

As shown in fig. 1, a high-precision concentrating solar cell dual-axis sun tracking system mainly comprises four parts: the device comprises a condensing optical assembly 1, a pitching shaft assembly 2, an azimuth shaft assembly 3 and a base 4. The base 4 plays a supporting role of the double-shaft solar tracking system, and meanwhile, wiring and a controller are arranged in the cavity of the base. The azimuth axis component 3 is connected with the base 4 through bolts through 6 bolt hole positions on an azimuth axis reduction box end cover II 13 in the figure 2. In fig. 3, the pitch shaft support seat 30 is matched with the step surface at the output end of the azimuth shaft worm wheel 19 in fig. 2 and then is connected with the pitch shaft assembly 2 through a bolt. The condensing optical assembly 1 is bolted to bolt hole positions on the pitch axis offset frame i 25 and the pitch axis offset frame ii 38 in fig. 3.

Fig. 2 is an exploded view of an azimuth axis assembly of a high-precision concentrator solar cell two-axis solar tracking system. One side of an azimuth axis worm bearing I14 is matched with a bearing hole position corresponding to an azimuth axis reduction box body 11, the other side of the azimuth axis worm bearing I is arranged at a shaft shoulder position of an input end of an azimuth axis worm 15, one side of an azimuth axis worm bearing II 16 is arranged at a shaft shoulder position of an output end of the azimuth axis worm 15, the other side of the azimuth axis worm bearing I is arranged at a bearing hole position corresponding to an azimuth axis worm end cover 17, the azimuth axis worm end cover 17 is arranged on the azimuth axis reduction box body 11 through bolt connection, a hand wheel I18 is connected with a step surface bolt of the output end of the azimuth axis worm 15, a coupler I10 is arranged in a corresponding cavity of the azimuth axis reduction box body 11, one end of the coupler I10 is connected with an azimuth axis stepping motor 9 in a matched manner, one end of the coupler I is connected with an input end of the azimuth axis worm 15 in a close fit manner, the azimuth axis stepping motor 9 is connected with the azimuth axis reduction box body 11 through bolt connection, an azimuth axis worm wheel 19 is arranged, the other side is arranged at the bearing hole position of the azimuth shaft reduction box end cover II 13, one side of the azimuth shaft worm wheel bearing II 20 is arranged at the shaft shoulder position of the output end of the azimuth shaft worm wheel 19, and the other side is arranged at the bearing hole position of the azimuth shaft reduction box end cover I5. The azimuth axis reduction box end cover I5 and the azimuth axis reduction box end cover II 13 are eccentric end covers, and the center distance between the azimuth axis worm 15 and the azimuth axis worm wheel 19 is adjusted by adjusting bolt hole positions of the end covers corresponding to the azimuth axis reduction box body 11, so that the purpose of eliminating the meshing clearance of the worm wheel and the worm is achieved. The azimuth axis protective cover 7 is fitted to the azimuth axis reduction gear box 11, and functions to prevent dust and to add grease to the azimuth axis worm 15. The photoelectric groove type sensor I6 is arranged at a position, corresponding to a hole position, of the azimuth axis reduction box body 11 and used for position limitation and zero calibration of the azimuth axis assembly 3 in the figure 1. The bridge type line pressing plate I8 is installed at the position, corresponding to the hole position, of the azimuth axis reduction box body 11 and used for arranging lines.

Fig. 3 is an exploded view of a pitch shaft assembly of a high-precision concentrator solar cell two-axis sun-tracking system. One side of a pitch shaft worm bearing II 37 is matched with a bearing hole position corresponding to the pitch shaft speed reducing box body 45, the other side of the pitch shaft worm bearing II is arranged at a shaft shoulder position of the input end of the pitch shaft worm 35, one side of a pitch shaft worm bearing I32 is arranged at the shaft shoulder position of the output end of the pitch shaft worm 35, the other side of the pitch shaft worm bearing II is arranged at a bearing hole position corresponding to a pitch shaft worm end cover 33, the pitch shaft worm end cover 33 is arranged on the pitch shaft speed reducing box body 45 through bolt connection, a hand wheel II 34 is connected with a step surface bolt of the output end of the pitch shaft worm 35, a coupler II 23 is arranged in a corresponding cavity of the pitch shaft speed reducing box body 45, one end of the coupler II is tightly matched and connected with a pitch shaft stepping motor 24, one end of the coupler II is tightly matched and connected with the input end of the pitch shaft worm 35, the pitch shaft stepping motor 24 is connected with the, the other side of the pitch shaft worm gear bearing II 43 is arranged at the bearing hole position of the pitch shaft reduction box end cover II 39, one side of the pitch shaft worm gear bearing II 43 is arranged at the shaft shoulder position of the output end of the pitch shaft worm gear 42, and the other side of the pitch shaft worm gear bearing II is arranged at the bearing hole position of the pitch shaft reduction box end cover I26. The pitch shaft reduction box end cover I26 and the pitch shaft reduction box end cover II 39 are eccentric end covers, and the center distance between the pitch shaft worm 35 and the pitch shaft worm gear 42 is adjusted by adjusting bolt hole positions of the end covers corresponding to the pitch shaft reduction box body 45, so that the purpose of eliminating a worm gear meshing gap is achieved. The pitching shaft offset frame I25 and the pitching shaft offset frame II 38 are respectively matched with the step surface at the output end of the pitching shaft worm gear 42 and then connected through bolts. The pitch-axis protective cover 40 cooperates with the pitch-axis reduction gear box 45 for dust prevention and grease addition to the pitch-axis worm 35. The photoelectric groove type sensor II 21 and the photoelectric groove type sensor III 36 are respectively arranged at the positions of corresponding hole positions of the pitch shaft speed reducing box body 45, wherein the installation position of the photoelectric groove type sensor II 21 forms an included angle of 135 degrees with the horizontal plane, the installation position of the photoelectric groove type sensor III 36 forms an included angle of-10 degrees with the horizontal plane, the photoelectric groove type sensor II 21 and the photoelectric groove type sensor III 36 are matched with a receiving device on a pitch shaft offset frame for use, and the photoelectric groove type sensor II 21 and the photoelectric groove type sensor III 36 are used for position limitation and zero position calibration of the pitch. The bridge type wire pressing plate II 22, the bridge type wire pressing plate III 27, the bridge type wire pressing plate IV 28, the bridge type wire pressing plate V31 and the bridge type wire pressing plate VI 44 are respectively installed at the corresponding hole positions of the pitch shaft speed reduction box body 45 and used for arranging wires. One end of the pitch shaft support seat 30 is connected with the pitch shaft reduction box 45 through a bolt corresponding to the bolt hole position, and the other end of the pitch shaft support seat is connected with the stepped surface at the output end of the azimuth shaft worm wheel 19 in fig. 2 through a bolt after being matched with the stepped surface. The steel bar 29 is arranged at the position of the pitch shaft reduction box body 45 corresponding to a hole position and is matched with the photoelectric groove type sensor I6 in the figure 2 for use.

Fig. 4 is an isometric view of the concentrating optical assembly of a high-precision concentrating solar cell two-axis sun-tracking system. The four-quadrant silicon photocell sensor 47 is installed in the center of a four-quadrant silicon photocell sensor support 46, the short support column I45, the short support column II 48, the short support column III 49 and the short support column IV are respectively installed at positions, corresponding to bolt hole positions, of the four-quadrant silicon photocell sensor support 46, the concave lens support 44 is installed at the top ends of the short support column I45, the short support column II 48, the short support column III 49 and the short support column IV, the concave lens 51 is installed in the center of the concave lens support 44, the long support column I43, the long support column II 50, the long support column III 52 and the long support column IV 53 are respectively installed at positions, corresponding to bolt hole positions, of the concave lens support 44, the Fresnel lens support 42 is installed at the top ends of the long support column I43, the long support column II 50, the long support column 52 and the long support column IV 53, and the Fresnel lens 54 is.

Fig. 5 is a working schematic diagram of a condensing optical assembly of a high-precision condensing solar cell dual-axis sun tracking system. As can be seen from fig. 5, the incident light is focused on the concave lens 51 through the fresnel lens 54, and finally forms a bundle of collimated light to be irradiated on the four-quadrant silicon photocell sensor 47. The distance between the fresnel lens 54 and the concave lens 51 depends on their focal length, and the distance between the concave lens 51 and the four-quadrant silicon photocell sensor 47 depends on the receiving performance index of the four-quadrant silicon photocell sensor 47.

Fig. 6 is an axonometric view of an error calibration device of a high-precision concentrating solar cell dual-axis sun tracking system. The high-definition camera 66 is installed in the center of a camera support 64, a light tube support column I63, a light tube support column II 65, a light tube support column III 67 and a light tube support column IV 68 are respectively installed at positions of the camera support 64 corresponding to bolt hole positions, a shadow receiving tray support 69 is in bolt connection with the light tube support column I63, the light tube support column II 65, the light tube support column III 67 and the light tube support column IV 68, a shadow receiving tray 70 is installed on the shadow receiving tray support 69, one end of a light tube sleeve 62 is in bolt connection with the shadow receiving tray 70, the other end of the light tube sleeve is in tight fit connection with the light tube 61, and the ultra-fine high-hardness tungsten rod 60 is located in the light tube 61 and installed in the center of.

Fig. 7 is a hardware system block diagram of a high-precision concentrator solar cell two-axis sun tracking system. Wherein, the GPS module is used for obtaining the longitude and latitude of the current tracking system, the IMU module is used for obtaining the attitude Euler angle of the current base 4, the four-quadrant silicon photocell sensor 47 is used as a photosensitive device, the azimuth axis encoder and the pitch axis encoder are used for realizing the closed-loop control of the motor, the output end of the GPS module is connected with the IMU module, the output end of the IMU module is connected with the microcontroller, the output end of the four-quadrant silicon photocell sensor 47 is connected with the microcontroller, the power supply module is respectively connected with the RTC module, the microcontroller, the azimuth axis stepping motor 9 and the pitch axis stepping motor 24, the output end of the RTC module is connected with the microcontroller, the microcontroller is connected with the azimuth axis stepping motor 9 through an azimuth axis motor driving unit, the azimuth axis stepping motor 9 is connected with the microcontroller through an azimuth axis encoder, the microcontroller is connected with the pitch axis stepping motor 24 through a pitch axis motor driving unit, and the pitch axis stepping motor 24 is connected with the microcontroller through a pitch axis encoder.

Fig. 8 is a graph of experimental error results of a high-precision concentrator solar cell dual-axis sun tracking system. By adopting the system of the utility model, outdoor tracking experiment tests were carried out in Shenzhen city (longitude and latitude: 22 degrees 35 '10' N113 degrees 58 '2' E, altitude: 50 m) in 7 months in 2019, and it was verified that the tracking accuracy was within 0.188 degrees under the condition that the system error compensation parameters (the inclination azimuth angle of the azimuth axis, the inclination angle of the azimuth axis, the deflection angle of the straight line between the pitch axis and the vertical azimuth axis, and the inclination angle of the reference plane of the solar cell panel relative to the pitch axis) were respectively 0.62 degrees, -0.57 degrees, 0.42 degrees and 1.25 degrees.

In addition, the whole system main body part is shown in fig. 1, and the error calibration device shown in fig. 6 is used for testing and calibrating system errors, and the light-gathering optical assembly 1 shown in fig. 1 is replaced when in use. The working principle of fig. 6 is: the tracking system tracks the sun in real time, the error calibration device is aligned to the sun at the moment, due to the geometrical optics principle, a shadow straight line is formed on the shadow receiving disc by the ultra-fine high-hardness tungsten rod in the light cylinder, the length of the shadow straight line is calibrated by using an image processing method after a high-definition camera captures a shadow straight line image, then the included angle between the ultra-fine high-hardness tungsten rod and the sun light is calculated by using a trigonometric function formula, and the tracking error of the system is calibrated.

The utility model provides a pair of high accuracy spotlight solar cell biax sun tracker on the basis of current biax tracking technique, structural part has designed eccentric end cover, spotlight optical assembly and error calibration device, and GPS module, IMU module and four-quadrant silicon photocell sensor have been added to the hardware part, provide a low-cost biax sun tracker of high accuracy. The eccentric end cover of the sun tracking system eliminates the meshing gap of the worm and gear, and ensures the mechanical transmission precision of the system; the light-gathering optical assembly improves the quality of light received by the sensor and improves the accuracy of the sensor; the error calibration device improves the measurement precision of the system; the four-quadrant silicon photocell sensor improves the accuracy of the sensor.

The utility model provides a pair of high accuracy spotlight solar cell biax sun tracking system and method has eliminated the meshing clearance of worm gear through the mode that adopts high accuracy worm gear cooperation eccentric end cover, has guaranteed system mechanical transmission precision. Through adopting the mode that four-quadrant silicon photocell sensor replaces traditional photosensor, improved the easy saturated problem of photosensor photoelectric conversion, four-quadrant silicon photocell sensor carries on spotlight optical assembly simultaneously, has improved the quality that the sensor received light, has improved the sensor precision. By adopting the mode of adding the IMU module on the base, the error caused by the problem of base placement is eliminated. By designing the error calibration device, a system error calibration method based on image processing is provided, and the method is beneficial to improving the system precision.

Compare in other prior art, the utility model has the advantages as follows:

(1) the designed transmission structure eliminates the meshing clearance of the worm and gear and ensures the mechanical transmission precision of the system;

(2) the designed four-quadrant silicon photocell and the condensing optical assembly improve the quality of light received by the sensor and improve the accuracy of the sensor;

(3) the adopted IMU module eliminates errors caused by the problem of base placement;

(4) the designed error calibration device is beneficial to improving the system precision.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a high accuracy spotlight solar cell biax sun tracker which characterized in that: including spotlight optical assembly, pitch shaft subassembly, azimuth axis subassembly and base, wherein, the azimuth axis subassembly is installed on the base, the pitch axis subassembly is installed at the output of azimuth axis subassembly, spotlight optical assembly installs the output of pitch axis subassembly, the azimuth axis subassembly includes the azimuth axis box and installs azimuth axis motor, azimuth axis worm gear mechanism in the azimuth axis box, the azimuth axis box is installed on the base, azimuth axis worm gear mechanism is including engaged with azimuth axis worm and azimuth axis worm wheel, the azimuth axis motor with the azimuth axis worm is connected, the azimuth axis worm wheel with the pitch axis subassembly is connected, the axis perpendicular to horizontal plane of azimuth axis worm wheel, the pitch axis subassembly includes the pitch axis box and installs pitch axis motor, azimuth axis worm gear in the pitch axis box, The optical fiber collecting device comprises a pitching shaft worm gear mechanism and a pitching shaft offset frame, wherein a pitching shaft box body is arranged on an azimuth shaft worm gear, the pitching shaft worm gear mechanism comprises a pitching shaft worm and a pitching shaft worm gear which are meshed with each other, a pitching shaft motor is connected with the pitching shaft worm, the pitching shaft worm gear is connected with the pitching shaft offset frame, a light-gathering optical assembly is arranged on the pitching shaft offset frame, and the axis of the pitching shaft worm gear is parallel to the horizontal plane.

2. The high-precision concentrator solar cell dual-axis solar tracking system of claim 1, wherein: the condensing optical assembly comprises a condensing optical support assembly, a Fresnel lens, a concave lens and a four-quadrant silicon photocell sensor, wherein the Fresnel lens, the concave lens and the four-quadrant silicon photocell sensor are arranged on the condensing optical support assembly, the condensing optical support assembly is arranged on the pitching axis offset frame, incident light passes through the Fresnel lens and then is focused on the concave lens, and finally a bundle of collimated light is formed and irradiated on the four-quadrant silicon photocell sensor.

3. The high-precision concentrator solar cell dual-axis solar tracking system of claim 2, wherein: the high-precision concentrating solar cell double-shaft solar tracking system further comprises a microcontroller, a power supply module, an RTC module, a GPS module for acquiring the longitude and latitude of the current tracking system, and an IMU module for acquiring the attitude Euler angle of the current base, wherein the IMU module is arranged on the base, the output end of the GPS module is connected with the IMU module, the output end of the IMU module is connected with the microcontroller, the output end of the four-quadrant silicon photocell sensor is connected with the microcontroller, the power supply module is respectively connected with the RTC module, the microcontroller, an azimuth axis motor and a pitching axis motor, the output end of the RTC module is connected with the microcontroller, the microcontroller is connected with the azimuth axis motor through an azimuth axis motor driving unit, the azimuth axis motor is connected with the microcontroller through an azimuth axis encoder, and the microcontroller is connected with the pitching axis motor through a pitching axis motor driving unit, the pitch shaft motor is connected with the microcontroller through a pitch shaft encoder.

4. The high-precision concentrator solar cell dual-axis solar tracking system of claim 3, wherein: the azimuth axis assembly further comprises an azimuth axis photoelectric groove type sensor for limiting the position of the azimuth axis and calibrating the zero position, the output end of the azimuth axis photoelectric groove type sensor is connected with the microcontroller, and a rod body matched with the azimuth axis photoelectric groove type sensor for use is arranged at the bottom of the pitching shaft box body.

5. The high-precision concentrator solar cell dual-axis solar tracking system of claim 3, wherein: the pitch shaft assembly further comprises a first pitch shaft photoelectric groove type sensor and a second pitch shaft photoelectric groove type sensor which are used for limiting the position of the pitch shaft and calibrating the zero position, the first pitch shaft photoelectric groove type sensor and the second pitch shaft photoelectric groove type sensor are respectively installed on two sides of the pitch shaft box body, a receiving device which is matched with the first pitch shaft photoelectric groove type sensor or the second pitch shaft photoelectric groove type sensor for use is arranged on the pitch shaft offset frame, and the output ends of the first pitch shaft photoelectric groove type sensor and the second pitch shaft photoelectric groove type sensor are respectively connected with the microcontroller.

6. The high-precision concentrator solar cell dual-axis solar tracking system of claim 5, wherein: the installation position of the first pitching axis photoelectric groove type sensor forms an included angle of 135 degrees with the horizontal plane, and the installation position of the second pitching axis photoelectric groove type sensor forms an included angle of-10 degrees with the horizontal plane.

7. The high-precision concentrator solar cell dual-axis solar tracking system of claim 1, wherein: the azimuth axis box body comprises an azimuth axis reduction box body, an azimuth axis reduction box end cover I and an azimuth axis reduction box end cover II, wherein two ends of an azimuth axis worm wheel are respectively connected with the azimuth axis reduction box end cover I and the azimuth axis reduction box end cover II through bearings; the pitch shaft box body comprises a pitch shaft speed reduction box body, a pitch shaft speed reduction box end cover I and a pitch shaft speed reduction box end cover II, two ends of a pitch shaft worm gear are respectively connected with the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II through bearings, the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II are respectively connected with the pitch shaft speed reduction box body through bolts, the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II are eccentric end covers, and the center distance between the pitch shaft worm and the pitch shaft worm gear is adjusted by adjusting bolt hole positions corresponding to the pitch shaft speed reduction box body and the pitch shaft speed reduction box end cover I and the pitch shaft speed reduction box end cover II, so that the purpose of.

8. The high-precision concentrator solar cell dual-axis solar tracking system of claim 1, wherein: the high-precision concentrating solar cell double-shaft sun tracking system also comprises an error calibration device, wherein the error calibration device comprises a camera support, a high-definition camera, a light cylinder support column, a shadow receiving disc support, a shadow receiving disc, a light cylinder sleeve, a light cylinder and a superfine high-hardness tungsten rod, the high-definition camera and the light cylinder supporting column are respectively arranged on the camera support, the shadow receiving disc support is arranged on the light cylinder supporting column, the shadow receiving pan is mounted on the shadow receiving pan support, the optical cylinder sleeve is mounted on the shadow receiving pan, the light cylinder is arranged on the light cylinder sleeve, the ultra-fine high-hardness tungsten rod is arranged on the shadow receiving disk, the ultra-fine high-hardness tungsten rod is positioned in the optical cylinder, and the axis of the optical cylinder, the axis of the optical cylinder sleeve, the center of the shadow receiving disc, the ultra-fine high-hardness tungsten rod and the high-definition camera are arranged in a collinear manner.

9. The high-precision concentrator solar cell dual-axis solar tracking system of claim 8, wherein: the error calibration device or the light-gathering optical assembly is mounted on a pitching shaft offset frame of the pitching shaft assembly.