A dual-axis light energy automatic tracking system

Abstract

The present invention provides a dual-axis light energy automatic tracking system, which adopts a control process that combines time control and light control. The initial system reads GPS time information, calculates the solar altitude angle and azimuth angle, and transmits them to the actuator. Furthermore, if there is sufficient light, the system will further use photoelectric tracking, using the measured voltage difference of the photoelectric sensor as the feedback quantity for closed-loop control, so that the sunlight can be more accurately and vertically irradiated onto the lens surface and focused onto the Stirling heating head. The present invention solves the disadvantage that traditional photoelectric tracking is greatly affected by weather, ensures the accuracy and continuity of tracking, and adopts a Stirling generator as the collector end to improve the thermoelectric conversion efficiency of the device, which is in line with the development trend of clean and renewable energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of solar thermal power generation, in particular to a double-axis Fresnel solar thermal power generation automatic tracking device. BACKGROUND

[0002] With the continuous increase of energy cost, solar power generation has the advantages of abundant resources and no pollution, and as one of the sustainable development renewable energy technologies that the world generally pays attention to, it has been widely used. In order to improve the utilization efficiency of light energy, various aspects of research have been carried out at home and abroad. At present, the more mainstream development and utilization of solar thermal power generation technology mainly includes two aspects. The first is the solar photovoltaic power generation technology using solar cells to absorb light energy. The other is to use a concentrator to concentrate solar radiation energy, and then conduct the radiation to a special receiver to make the receiver produce high-temperature heat fluid, and then drive a heat engine such as a gas turbine, a steam turbine, a Stirling generator, etc. to generate electricity. The photovoltaic material in the current solar photovoltaic power generation technology is mainly semiconductor silicon, which has low energy conversion efficiency and is difficult to supply large-scale power demand. Moreover, if the solar cell is not treated, it will cause damage to the environment. These factors limit the application of photovoltaic power generation system in practice. The solar thermal power generation technology generates high-temperature heat through concentration, and then converts it into mechanical energy through a heat engine, and then generates electricity through a generator. It not only effectively reduces the pollution to the environment, but also relieves the urgent consumption of fossil energy for power generation. This technology is basically the same as traditional power generation equipment, and the technology is relatively mature. The power generation scale can be large or small, and has a broad development prospect.

[0003] The Stirling engine is an external heat or combustion piston-driven heat engine, which uses gas as the working medium and works in a closed regenerative cycle. It has no special requirements for the heating method, as long as the temperature of the heat source is higher than the temperature of the working medium in the closed cycle. This makes it easy and flexible to select fuel, allowing the use of external fuels such as firewood with higher impurities.

[0004] The Fresnel lens is also known as a threaded lens. It is usually a thin sheet made of polyolefin material by injection molding. One side of the lens is a smooth light surface, and the other side is engraved with a lot of concentric circular lines from small to large. Each line corresponds to the same focal point, so that parallel light can be concentrated and projected to a point, forming a light spot and keeping the brightness of the image consistent. The Fresnel lens saves material, has low cost and light weight, and is suitable for making solar concentrator heat collectors.

[0005] Most of the prior art solar tracking devices mainly manually adjust the angle between the solar tracking device and sunlight, and the sunlight cannot vertically irradiate on the solar equipment most of the time. A few solar tracking devices can automatically track the sunlight, but the structure is complex, the working condition of the tracking device is very high, and the cost is high, which is greatly limited in application. SUMMARY

[0006] The application aims to provide a double-shaft light energy automatic tracking system, which is suitable for power generation demand in highly complex and variable environment and can maximize the solar energy utilization efficiency.

[0007] The above-mentioned purpose of the application is realized by the following technical scheme:

[0008] A double-shaft light energy automatic tracking system, comprising a light collecting device 1, a power device 2, a transmission device 3, a signal acquisition device 4, a light energy receiving device 6, a supporting device 8 and a box 9; the transmission device 3 comprises a gear transmission device and a worm gear transmission device, the gear transmission device comprises a transmission pinion 0303 and a rotating device 0304 with external teeth engaged with the transmission pinion 0303, and the worm gear transmission device comprises a worm and a worm wheel 0301 matched with the worm; the worm wheel 0301 is perpendicular to the rotating axis of the rotating device 0304 with external teeth; the upper surface of the box 9 has a circular ring-shaped positioning guide rail 0306, and the rotating device 0304 with external teeth is positioned by a circular arc-shaped sliding block 0305 and the circular ring-shaped positioning guide rail 0306; the power device comprises an azimuth control motor 0202 and an altitude angle control motor 0201, the altitude angle control motor 0201 is fixed on the box 9, the transmission pinion 0301 is fixed on the output end of the azimuth control motor 0202, and the worm is fixed on the output end of the altitude angle control motor 0201; the signal acquisition device 4 comprises a photoelectric sensor 0401, an angle sensor 0402 and a gyroscope 0403 fixed on the supporting device 8; the supporting device 8 is positioned by the clamping groove on the upper surface of the rotating device 0304 with external teeth, and the lower part of the supporting device 8 has a cylindrical boss penetrating the central circular hole of the rotating device 0304 with external teeth matched with a bearing; the light energy receiving device 6 is fixed on the upper surface of the supporting device 8, and the supporting device 8 on both sides of the light energy receiving device 6 has a Y-shaped support 0802, a horizontal connecting rod 0302 is rotatably connected in the through hole at the upper end of the Y-shaped support 0802, one end of the horizontal connecting rod 0302 on one side of the Y-shaped support 0802 is fixedly connected to the worm 0301, the other end of the horizontal connecting rod 0302 is fixedly connected with the angle sensor 0402, the other end of the horizontal connecting rod 0302 is connected with a conical support 0102 of the light collecting device 1, and the photoelectric sensor 0401 is fixedly connected on the conical support 0102.

[0009] As a more optimal technical solution of the present application: the conical support 0102 includes a circular arc support on the top surface of the circular truncated cone, the circular arc support is connected with the horizontal connecting rod 0302, a support rod is connected with the circular arc support, the support rod is located on the side surface of the circular truncated cone, the other end of the support rod is connected with a circular ring support, the circular ring support is located on the bottom surface of the circular truncated cone, and the Fresnel focusing lens 0101 is installed on the circular ring support.

[0010] As a more optimal technical solution of the present application: the end point of the circular arc support is fixedly connected with a circular arc limiting device 7.

[0011] As a more optimal technical solution of the present application: the four circular arc sliders 0305 are located below the rotating device 0304 with external teeth in the opening and are fixed on the boss in the opening through a shaft pin, the positioning guide rail 0306 is bolted to the upper surface of the box body 09 below the rotating device 0304, and the slider 0305 moves with the rotating device 0304 with external teeth and slides in the positioning guide rail 0306.

[0012] As a more optimal technical solution of the present application: it further includes a signal processing device, the signal processing device is an integrated control panel, including a control chip, a photoelectric encoder and a microprocessor, the signal processing device is connected with the power supply, and the signal processing device and the power supply are installed inside the box body 9.

[0013] As a more optimal technical solution of the present application: the photoelectric sensor 0401 includes a base 05, a lens barrel 06 and a silicon photocell 04 are fixed on the base 05, and the silicon photocell 04 is sequentially provided with a light shield plate 03 with a small hole, a concave lens 02 and a condensing convex lens 01.

[0014] As a more optimal technical solution of the present application: the silicon photocell 04 is eight pieces 0401-0408, wherein the first to fourth silicon photocells 0401-0404 are arranged in the lens barrel, and the fourth to eighth silicon photocells 0405-0408 are arranged outside the lens barrel 06. The photoelectric sensor adopted in the present application is transformed on the basis of the existing photoelectric solar light tracker, one concave lens is added, so that the length of the light shielding straight cylinder is not limited by the focal length of the condensing lens, and the uniformity of the light spot brightness is improved; four electric element pieces are additionally arranged outside the light shielding straight cylinder to detect the ambient light and generate a judgment signal as light control and time-space switching.

[0015] As a more optimal technical solution of the present application: the light energy receiving device 6 is a Stirling generator, and the heating head of the Stirling generator is located in a spherical region with the focal length of the Fresnel focusing lens 0101 as the center.

[0016] As a more optimal technical scheme of the present application: the support device 08 comprises a central rotating support table 0801 and a Y-shaped support 0802, and a boss at the lower part of the central rotating support table 0801 is in contact with a groove 0901 on the upper surface of the lower box through a thrust roller bearing. The mechanism for adjusting the azimuth angle of the present application comprises a central rotating support table and a rotating device with external teeth, the central rotating support table is provided with a cylindrical boss below, the boss passes through the central hole of the rotating device with external teeth matched with the bearing, is in contact with the groove on the upper surface of the lower box through a thrust roller bearing, and bears most of the weight of the rotating support table and the upper mechanism. A clamping groove is processed on the upper surface of the rotating device with external teeth close to the gear, so that the central rotating support table is positioned and fixed through the bolt, and the angular momentum output by the azimuth angle stepping motor is transmitted to the central rotating support table. The rotating device with external teeth is provided with a pin shaft in the radial direction, so as to fix a sliding block, and the sliding block slides on the circular arc guide rail above the box, so as to play a guiding role.

[0017] In view of the requirement of maximizing the utilization rate of solar energy in complex and changeable environment, the present application provides a tracking method combining time control and light control, the time control is used for weather with low light intensity signal lower than the sensitivity of the light control system in weak light such as haze, so as to prevent the device from malfunctioning, and the light control is used for accurate tracking in strong light, and can eliminate the error accumulation phenomenon caused by the time control. The tracking method is based on the implementation of the above-mentioned double-axis Fresnel light energy automatic tracking system, and the specific implementation is as follows:

[0018] The time control is started, the device reads the GPS latitude and longitude date and time information to the main control chip of the tracking system, the chip calculates the altitude angle and azimuth angle of the sun, and compares the azimuth angle and altitude angle of the light collecting device sensed by the gyroscope and the angle sensor, and then sends a control signal to drive the motor to track and position, at the same time, the photoelectric sensor collects light intensity information to generate an electric signal, which is fed back to the main control chip of the tracking system after being amplified by the amplifying circuit; the control chip detects whether the current signal of each of the four current sensing elements of the photoelectric sensor is greater than the threshold value, to determine whether to start the light control part, if the light control part is not started, the time control is maintained; if the light control part is started, the time control is automatically closed, at the same time, the control chip calculates the light spot offset according to the voltage difference of the four current sensing elements in the two perpendicular directions, changes the azimuth angle and altitude angle of the light collecting device, and after the posture of the device is adjusted, the photoelectric sensor feeds back the voltage difference in the two perpendicular directions to the control chip, and recalculates the light spot offset, as long as the voltage deviation is greater than the sensitivity of the element, the tracking system will continuously adjust until the posture is determined, and a control cycle is completed.

[0019] The present application has the following beneficial effects:

[0020] The tracking mode combining time control and light control avoids the cumulative error caused by single control and the low reliability in changeable weather.

[0021] The photoelectric sensor using silicon photocell as the light sensing element has the linear characteristic that the photocurrent is proportional to the light area at a certain light intensity, which is convenient for establishing the relationship between the voltage deviation and the elevation angle and the azimuth angle, and is beneficial to the accurate correction of the posture of the light gathering device.

[0022] The Stirling generator with high thermoelectric conversion efficiency is used as the light energy receiving device, which improves the energy utilization rate.

[0023] The bipolar shaft type gear transmission arrangement scheme can greatly reduce the size of the device, and at the same time, the movable azimuth angle and elevation angle of the mechanism can reach the maximum range. The stepping motor is used as the power source, which can make the angle control more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings described herein are used to provide further understanding of the present application, and constitute a part of the present application. The illustrative examples of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application.

[0025] Figure 1 It is a schematic diagram of the whole application

[0026] Figure 2 It is a partial schematic diagram of the application

[0027] Figure 3 It is a top view of the improved photoelectric sensor;

[0028] Figure 4 It is a sectional view of the improved photoelectric sensor;

[0029] Figure 5 It is a schematic diagram of the structure of the improved photoelectric sensor;

[0030] Figure 6 It is a control flow chart of the automatic tracking system.

[0031] Figure 1 In the figure: 0101 is a Fresnel focusing lens, 0102 is a conical support, 0201 is an elevation angle control motor, 0202 is an azimuth angle control motor, 0301 is a worm gear transmission device, 0302 is a horizontal connecting rod, 0303 is a gear transmission device, 0304 is a rotating device with external teeth, 0401 is a photoelectric sensor, 0402 is an angle sensor, 0403 is a gyroscope, 6 is a Stirling generator, 7 is a limit stop ring, 0801 is a rotating support table, 0802 is a Y-shaped support, and 9 is a box body.

[0032] Figure 2In the middle: 0801 is a rotating support table, 0304 is a rotating device with external teeth, 0305 is a sliding block, and 0306 is a circular arc positioning guide rail.

[0033] Figure 3 In the middle: 01 is a light converging convex lens, 02 is a concave lens, 03 is a light shield with a small hole, 04 is eight silicon photocells, 05 is a base, 06 is a black straight cylinder, 0401, 0402, 0403, and 0404 of the eight silicon photocells are arranged inside the cylinder, and 0405, 0406, 0407, and 0408 are arranged outside the cylinder. DETAILED DESCRIPTION

[0034] The detailed content of the present application and its specific implementation mode are further illustrated below in combination with the drawings.

[0035] As Figures 1 to 5As shown, the present application provides a biaxial light energy automatic tracking system, comprising a light collecting device 1, a power device 2, a transmission device 3, a signal acquisition device 4, a light energy receiving device 6, a supporting device 8 and a box 9; the transmission device 3 comprises a gear transmission device and a worm gear transmission device, the gear transmission device comprises a transmission pinion 0303 and a rotating device 0304 with external teeth engaged with the transmission pinion 0303, the worm gear transmission device comprises a worm and a worm wheel 0301 matched with the worm; the worm wheel 0301 is perpendicular to the rotating axis of the rotating device 0304 with external teeth; the upper surface of the box 9 has a circular positioning guide rail 0306, and the rotating device 0304 with external teeth is positioned by the circular arc-shaped sliding block 0305 and the circular positioning guide rail 0306; the power device comprises an azimuth control motor 0202 and an elevation control motor 0201, the elevation control motor 0201 is fixed on the box 9, the transmission pinion 0301 is fixed on the output end of the azimuth control motor 0202, and the worm is fixed on the output end of the elevation control motor 0201; the signal acquisition device 4 comprises a photoelectric sensor 0401, an angle sensor 0402 and a gyroscope 0403 fixed on the supporting device 8; the supporting device 8 is positioned by the clamping groove on the upper surface of the rotating device 0304 with external teeth, the supporting device 8 below has a cylindrical boss passing through the central circular hole of the rotating device 0304 with external teeth matched with the bearing, the light energy receiving device 6 is fixed on the upper surface of the supporting device 8, the supporting device 8 on both sides of the light energy receiving device 6 has a Y-shaped support 0802, the upper end of the Y-shaped support 0802 has a through hole rotatably connected with a horizontal connecting rod 0302, one end of the horizontal connecting rod 0302 on one side of the Y-shaped support 0802 is fixedly connected with the worm 0301, the other end of the horizontal connecting rod 0302 is fixedly connected with the angle sensor 0402, the other end of the horizontal connecting rod 0302 is connected with the conical support 0102 of the light collecting device 1, and the photoelectric sensor 0401 is fixedly connected on the conical support 0102.

[0036] In some embodiments, the conical support 0102 includes a circular arc-shaped support on the top surface of the circular truncated cone, which is connected with the horizontal connecting rod 0302. The circular arc-shaped support is connected with a support rod, which is located on the side surface of the circular truncated cone. The other end of the support rod is connected with a circular ring-shaped support, which is located on the bottom surface of the circular truncated cone. The circular ring-shaped support is installed with a Fresnel focusing lens 0101. The Fresnel lens is fixed on the light-weight conical support 0102, which includes five radially arranged connecting spokes with adjustable length. During installation, the length of the connecting spokes needs to be adjusted according to the focal length of the Fresnel lens so that the focusing center is located within the spherical region centered on the center of the smaller end surface of the conical support. The light-collecting device composed of the Fresnel lens and the conical support can rotate around the second polar axis perpendicular to the central axis on the central rotating support platform 0801.

[0037] In some embodiments, the circular arc-shaped support is fixedly connected with a circular arc-shaped limiting device 7 at the end points. The limiting device 07 is welded with the conical support using a circular arc-shaped piece. When the arc-shaped piece reaches the limit position, it will fit the outer surface of the Stirling machine, preventing the conical support from colliding with the device body. At the same time, the control chip will read the limit position value of the angle sensor, causing the stepper motor to stop working.

[0038] In some embodiments, the circular arc-shaped slider 0305 is four pieces, which are located in the openings of the rotating device 0304 with external teeth below the support device 08 and are fixed on the bosses in the openings through shaft pins. The positioning guide rail 0306 is bolted to the upper surface of the box 09 below the rotating device 0304. The slider 0305 moves with the rotating device 0304 with external teeth and slides in the positioning guide rail 0306. The slider is located in the groove of the opening of the rotating device 0304 with external teeth below the central rotating support platform. The circular arc-shaped positioning guide rail is bolted to the upper surface of the box 09 below the rotating device 0304 through shaft hole cooperation. The slider moves with the rotating device and slides in the positioning guide rail. The pinion is fixed to the output end of the azimuth angle control stepper motor, which is responsible for transmitting motion to the rotating device with external teeth. The worm is fixed to the output end of the elevation angle control motor, and the worm wheel is fixed to the horizontal connecting rod 0302. The worm and gear transmission mechanism ensures self-locking of the mechanism. The rotating shafts of the driven parts of the gear transmission mechanism and the worm and gear transmission mechanism are perpendicular to each other.

[0039] In some embodiments, the signal processing device is an integrated control board including a control chip, a photoelectric encoder and a microprocessor, the signal processing device is connected with the power supply, and the signal processing device and the power supply are installed inside the box body 9. The signal processing device adopts an integrated control board including a control chip, a photoelectric encoder, a microprocessor and the like. The control board processes various information collected by the signal collection device, sends control instructions, and realizes independent start-stop of the azimuth angle and elevation angle motors, step control and speed control. The signal processing device is placed in the box body 9 together with the power supply.

[0040] In some embodiments, the photoelectric sensor 0401 includes a base 05, a lens barrel 06 fixed on the base 05, and a silicon photocell 04, the silicon photocell 04 is sequentially provided with a light shield plate 03 with a small hole, a concave lens 02 and a condensing convex lens 01. The signal collection device adopts a photoelectric sensor 0401, an angle sensor 0402 and a gyroscope 0403. The photoelectric sensor is used to collect light signals and can perform coarse and fine positioning. The photoelectric sensor is installed on the unshielded area of the conical support 0102, the light receiving surface of the photoelectric sensor is parallel to the surface of the Fresnel lens, the angle sensor is used to collect the elevation angle of the device, and the gyroscope is used to collect the azimuth angle of the device.

[0041] In some embodiments, the silicon photocell 04 is eight pieces of 0401-0408, wherein the first to fourth pieces of silicon photocells 0401-0404 are arranged in the lens barrel, and the fourth to eighth pieces of silicon photocells 0405-0408 are arranged outside the lens barrel 06. The photoelectric sensor adopted in the present application is improved on the basis of the existing photoelectric solar light tracker. A concave lens is added to make the length of the light shielding cylinder not limited by the focal length of the condensing lens, and the uniformity of the spot brightness is improved. Four pieces of electric element are added outside the light shielding cylinder to detect ambient light and generate a judgment signal as a light control and time-space switching, as shown in Figure 3 .

[0042] In some embodiments, the light energy receiving device 6 is a Stirling generator, and the heating head of the Stirling generator is located in a spherical region centered on the focal length of the Fresnel focusing lens 0101. The Stirling generator is fixed on the rotating support table 0801 by bolts and rotates with the rotating support table 0801. The heating head of the Stirling generator is located in a spherical region centered on the focal length of the Fresnel lens.

[0043] In some embodiments, the support device 08 includes a central rotating support table 0801 and a Y-shaped support 0802, and the boss at the lower part of the central rotating support table 0801 is in contact with the groove 0901 on the upper surface of the lower box through a thrust roller bearing. The mechanism for adjusting the azimuth angle of the application includes a central rotating support table and a rotating device with external teeth, and the cylindrical boss at the lower part of the central rotating support table passes through the central hole of the rotating device with external teeth matched with a bearing, is in contact with the groove on the upper surface of the lower box through a thrust roller bearing, and bears the weight of the rotating support table and most of the upper mechanism. The upper surface of the rotating device with external teeth is processed with a clamping groove near the gear, which is convenient for positioning the central rotating support table and is fixed through bolts, and the angular momentum output by the azimuth angle stepping motor is transmitted to the central rotating support table. The rotating device with external teeth is installed with a pin shaft in the radial direction to fix the sliding block, which slides on the circular arc guide rail above the box to play a guiding role.

[0044] The application also provides a tracking method combining time control with light control, which is used for the requirement of maximizing the utilization of solar energy in complex and variable environments. The time control is used for weather with low light intensity signal under weak light such as haze, so as to prevent the device from malfunctioning. The light control is used for accurate tracking under strong light, and can eliminate the error accumulation phenomenon caused by time control. The tracking method is based on the implementation of the above-mentioned dual-axis Fresnel light energy automatic tracking system, and the specific implementation is as follows.

[0045] The time control is started, the device reads the GPS latitude, longitude and date and time information to the main control chip of the tracking system, the chip calculates the altitude angle and azimuth angle of the sun, and compares the azimuth angle and altitude angle of the light collecting device sensed by the gyroscope and the angle sensor to send a control signal to drive the motor to track and position. At the same time, the photoelectric sensor collects light intensity information to generate an electrical signal, which is fed back to the main control chip of the tracking system after being amplified by the circuit. The control chip detects whether the current signal of each of the four photoelectric elements outside the photoelectric sensor is greater than the threshold value to determine whether to start the light control part. If the light control is not started, the time control is maintained. If the light control is started, the time control is automatically turned off, and the control chip calculates the light spot offset according to the voltage difference of the four sensing elements in the light sensor in two mutually perpendicular directions, thereby changing the azimuth angle and altitude angle of the light collecting device. After the posture of the device is adjusted, the photoelectric sensor feeds back the voltage difference in the two perpendicular directions to the control chip, and recalculates the light spot offset. As long as the voltage deviation is greater than the sensitivity of the element, the tracking system will continuously adjust until the posture is determined, and a control cycle is completed.

[0046] The box 9 is provided with a power supply, a control box, various processors and control circuits in the control box, the control box receives sensor and GPS time signal, and through the calculation and processing of the main control chip, an electric signal is sent, on one hand, driving the horizontal angle control motor, driving the gear, thereby driving the rotating device 0304 with external teeth to rotate around the first polar axis, driving the central rotating support table fixedly connected with the rotating device 0304 through bolts and clamping grooves to rotate on the positioning circular guide rail, changing the azimuth angle of the device, on the other hand, driving the vertical height angle control motor, driving the worm gear, thereby driving the horizontal connecting rod at the second polar axis to rotate, driving the conical support fixedly connected with the horizontal connecting rod to rotate around the bearing hole of the Y-shaped support on the support table, changing the height angle of the device, thereby completing the tracking and positioning of the sun. The height angle control motor is fixed on the L-shaped support of the central support table 0801 rotating around the first polar axis, through receiving the electric pulse signal of the control board, converting into corresponding angular displacement, driving the worm gear transmission device 0301, through speed reduction, transmitting the angular displacement to the horizontal connecting rod 0302 at the second polar axis perpendicular to the central axis of the rotating support table 0801, driving the conical support 0102 fixedly connected with the horizontal connecting rod through bolts to rotate around the second polar axis, changing the height angle of the light collecting device. The azimuth angle control stepper motor is fixed on the protruding support outside the box 09, driving the gear transmission device 0303, through speed reduction, transmitting the angular displacement to the rotating device 0304 with external teeth fixedly connected with the central rotating support table through bolts, changing the azimuth angle of the rotating support table. The azimuth angle control stepper motor is fixed on the protruding support outside the box 09 through bolts, the height angle control stepper motor is fixed on the pedestal of the L-shaped support of the central support table 0801 through bolts, both motors receive the electric signal from the control board in the box. The pinion 0303 is fixed on the output end of the azimuth angle control stepper motor, the worm 0301 is fixed on the output end of the height angle control stepper motor, and the worm wheel 0301 is fixed on the input end of the horizontal connecting rod 0302. The rotating device 0304 with external teeth is positioned through the slider 0305 and the bottom circular guide rail 0306, and the central rotating support table 0801 is positioned through the clamping groove on the upper surface of the rotating device 0304. The conical support 0102 is fixedly connected with the horizontal connecting rod 0302 at the ring, and is supported by the Y-shaped support 0802 on the central rotating support table. The Fresnel focusing lens 0101 is fixed on the conical support 0102 and is positioned through five length-adjustable connecting spokes. The photoelectric sensor 0401 is installed on the upper end of the conical support 0102 to ensure that the light receiving surface is parallel to the surface of the Fresnel lens. The angle sensor 0402 is installed on one end of the horizontal connecting rod 0302. The gyroscope 0403 is installed on the rotating support table 0801. The limiting arc-shaped stopper 07 is welded with the conical support 0102. The Stirling engine 06 is fixed on the rotating support table 0801 through bolts.

[0047] As Figure 2As shown, the center rotating support table 0801 has a cylindrical boss below, the boss passes through the central circular hole of the rotating device 0304 with external teeth through bearing cooperation, and is in contact with the groove on the upper surface of the lower box through a thrust roller bearing, and bears most of the weight of the rotating support table and the upper mechanism. The upper surface of the rotating device 0304 with external teeth is processed with a clamping groove near the gear, which facilitates the positioning of the center rotating support table 0801 and is fixed through bolts. The rotating device with external teeth is installed with a pin shaft in the radial direction to fix the sliding block 0305, which slides on the circular arc guide rail 0306 above the box to play a guiding and positioning role.

[0048] The automatic tracking system of the application is fixed on the roof of the vehicle. After starting work, the device reads the GPS latitude and longitude date and time information to the main control chip of the tracking system. The chip calculates the altitude angle and azimuth angle of the sun, and compares them with the azimuth angle and altitude angle of the light collector sensed by the gyroscope and angle sensor, and then sends a control signal to drive the motor to complete the preliminary tracking and positioning. On the one hand, the control chip detects whether the current signal of each of the four sensing elements outside the photoelectric sensor is greater than the threshold value to determine whether to turn on the light control part. If the light control is not turned on, the time control is maintained. On the other hand, if the light control is turned on, the system automatically closes the time and space. At this time, if the Fresnel lens is not directly opposite the sunlight, the center of the light spot received by the photoelectric sensor with the same attitude as the Fresnel lens will deviate from the cylinder center, so that the two pairs of silicon photocells vertically arranged inside the sensor receive different areas of the light spot irradiation, and different photoelectric currents are generated. The photoelectric current is converted into a voltage value through the operational amplifier at the load end, and the voltage amplitude difference in the vertical two directions is obtained after being processed by the control chip. The processor sends a stepping signal to drive the motor to rotate by a corresponding angle to the end with smaller voltage, corrects the altitude angle and azimuth angle of the device, adjusts the attitude, and then the photoelectric sensor receives the light intensity signal again. The above process is repeated until the voltage amplitude difference as the feedback quantity is less than the sensitivity of the system, the photoelectric sensor stops working, the device position is determined, and a control cycle is completed.

[0049] In the description of the application, it should be understood that the terms "center", "vertical", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0050] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A dual-axis light energy automatic tracking system, characterized by: It includes a focusing device, a power device, a transmission device, a signal collection device, a light energy receiving device, a supporting device and a housing; the transmission device includes a gear transmission device and a worm gear transmission device, the gear transmission device includes a transmission pinion and a rotating device with external teeth meshing therewith, and the worm gear transmission device includes a worm and a worm wheel matched therewith; the rotation axis of the worm wheel and the rotating device with external teeth are perpendicular to each other; the upper surface of the housing is provided with a circular positioning guide rail, and the rotating device with external teeth is positioned with the circular positioning guide rail through an arc-shaped slider; the power device includes an azimuth angle control motor and an altitude angle control motor, the altitude angle control motor is fixed on the housing, the transmission pinion is fixed to the output end of the azimuth angle control motor, and the worm is fixed to the output end of the altitude angle control motor The output end of the motor; the signal acquisition device includes a photoelectric sensor, an angle sensor and a gyroscope fixed on the supporting device; the supporting device is positioned with the rotating device having external teeth through a slot on the upper surface thereof, and a cylindrical boss is provided below the supporting device, which passes through a central circular hole of the rotating device having external teeth matched with a bearing, and the light energy receiving device is fixed on the upper surface of the supporting device, and there are Y-shaped brackets on the supporting devices on both sides of the light energy receiving device, and a horizontal connecting rod is rotatably connected in the through hole at the upper end of the Y-shaped bracket, one end of the horizontal connecting rod on one side of the Y-shaped bracket is fixedly connected to the turbine, and one end of the horizontal connecting rod on the other side is fixedly connected to the angle sensor, and the other end of the horizontal connecting rod is connected to the conical bracket of the focusing device, and the photoelectric sensor is fixedly connected to the conical bracket.

2. The dual-axis light energy automatic tracking system according to claim 1, wherein: The conical bracket includes an arc-shaped bracket located on the top surface of the frustum, the arc-shaped bracket is connected to the horizontal connecting rod, the arc-shaped bracket is connected to a support rod, the support rod is located on the side of the frustum, the other end of the support rod is connected to a ring-shaped bracket, the ring-shaped bracket is located on the bottom surface of the frustum, and a Fresnel focusing lens is installed on the ring-shaped bracket.

3. The dual-axis light energy automatic tracking system according to claim 2, wherein: The end points of the arc-shaped bracket are fixedly connected with arc-shaped limiting devices.

4. The dual-axis light energy automatic tracking system according to claim 1, wherein: There are four arc-shaped sliders, which are located at the opening of the rotating device with external teeth below the supporting device and are fixed to the boss at the opening through an axle pin. The positioning guide rail is fixed to the upper surface of the box below the rotating device with bolts. The slider moves along with the rotating device with external teeth and slides in the positioning guide rail.

5. The dual-axis light energy automatic tracking system according to claim 1, wherein: It also includes a signal processing device, which is an integrated control board including a control chip, a photoelectric encoder and a microprocessor. The signal processing device is connected to a power supply, and the signal processing device and the power supply are installed inside the box.

6. The dual-axis light energy automatic tracking system according to claim 1, wherein: The photoelectric sensor comprises a base, on which a lens barrel and a silicon photocell are fixed. The silicon photocell is provided with a light shielding plate with a small hole, a concave lens, and a focusing convex lens in order in front.

7. The dual-axis light energy automatic tracking system according to claim 6, wherein: There are eight silicon photocells, wherein the first to fourth silicon photocells are arranged inside the lens barrel, and the fourth to eighth silicon photocells are arranged outside the lens barrel.

8. The dual-axis light energy automatic tracking system according to claim 1, wherein: The light energy receiving device is a Stirling generator, and the heating head of the Stirling generator is located in a spherical area centered on the focal length of the Fresnel focusing lens.

9. The dual-axis light energy automatic tracking system according to claim 1, wherein: The supporting device includes a central rotating support platform and a Y-shaped bracket. The boss at the lower part of the central rotating support platform contacts the groove on the upper surface of the lower box through a thrust roller bearing.

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