Adaptive light-adjusting solar street lamp based on photovoltaic energy storage

Abstract

The application relates to the technical field of lighting devices, and discloses a self-adaptive light-adjusting solar street lamp based on photovoltaic energy storage, which comprises a main lamp rod, a main lamp arm and a mechanical execution assembly. The mechanical execution assembly is installed inside the main lamp rod and the main lamp arm and comprises a push rod driving mechanism, a sensing limiting component and a zoom light distribution component. The step motor of the push rod driving mechanism drives the central linear push rod to generate linear displacement. The sensing limiting component converts the linear displacement of the central linear push rod into the closing action of the shade cover blade, reduces the physical detection angle of the environment sensor, and reduces the invalid triggering of the street lamp. Meanwhile, the zoom light distribution component converts the linear displacement of the central linear push rod into the linear sliding of the lower secondary parabolic reflector cup along the vertical direction, converges the outgoing light beam and reduces the light distribution angle. The upper cylindrical slide valve baffle moves downward synchronously with the lower secondary parabolic reflector cup and avoids the heat exchange associated air port, so that the heat dissipation channel is turned on.

Description

Technical Field

[0001] This invention relates to the field of lighting equipment technology, specifically to an adaptive dimming solar street light based on photovoltaic energy storage. Background Technology

[0002] Existing solar streetlights are typically equipped with environmental sensors to detect object movement and adjust the brightness of the light-emitting components based on the sensor signals. When the battery pack is low and deep energy saving is required, the fixed detection angle of the environmental sensor cannot be narrowed. The wide detection range can easily identify disturbances in non-critical areas along the road edge as valid trigger signals, causing the solar streetlights to be falsely activated and waste stored energy.

[0003] Meanwhile, the optical reflector of traditional solar streetlights is in a fixed position, and the light distribution angle of the light source cannot be adjusted. When the operating power is reduced, the fixed light distribution angle will cause the luminous flux to be excessively dispersed, resulting in a significant decrease in the illuminance of the core road surface directly below the solar streetlight, which in turn cannot meet the requirements for safe passage.

[0004] To simultaneously adjust the detection angle of the environmental sensor and the light distribution angle of the optical reflector, the conventional approach is to configure separate motor drive mechanisms for each. Setting up multiple drive mechanisms not only occupies the limited space inside the main lamp arm, causing a crowded and complex internal mechanical structure, but also increases the overall energy consumption and potential failure points of the solar street light. Addressing the technical shortcomings of the fixed detection angle of the environmental sensor, the inability to adjust the light distribution angle, and the bulky internal space caused by independent drive mechanisms, a novel mechanical actuation solution is urgently needed. Summary of the Invention

[0005] To achieve the above objectives, this invention provides the following technical solution: an adaptive dimming solar street light based on photovoltaic energy storage, comprising photovoltaic modules, a maximum power point tracking controller, a lithium battery pack, a battery management system, a main control unit, a main light pole, a main light arm mounted on the top of the main light pole, and mechanical actuators. The battery management system collects the terminal voltage and charging / discharging current values ​​of the lithium battery pack and calculates the state of charge (SOC) value of the lithium battery pack based on these values. The main control unit has preset primary warning thresholds and secondary extreme thresholds. The main control unit compares the SOC value of the lithium battery pack with the primary warning thresholds and the secondary extreme thresholds, and outputs electrical control signals based on the comparison results.

[0006] The mechanical actuator assembly is installed inside the main lamp post and main lamp arm, and includes a push rod drive mechanism, a sensing and limiting assembly, and a zoom and light distribution assembly. The push rod drive mechanism includes a stepper motor, a ball screw, and a central linear push rod. The stepper motor receives electrical control signals from the main control unit and drives the ball screw to rotate. The rotational motion of the ball screw is converted into linear displacement of the central linear push rod along the internal axial direction of the main lamp arm via a nut slider. The central linear push rod is the only power input component of the mechanical actuator assembly, and it connects the sensing and limiting assembly and the zoom and light distribution assembly via a mechanical structure.

[0007] The sensing and limiting assembly is installed at the bottom of the main light arm. The assembly includes a lens, an environmental sensor, a first light-shielding blade, a second light-shielding blade, a prime mover, a first transmission link, and a second transmission link. When the central linear push rod undergoes linear displacement away from the stepper motor, it pushes the prime mover forward. The prime mover then pushes the first and second transmission links to overcome the torque of the return torsion spring, causing the first and second light-shielding blades to rotate and close towards the central axis of the lens. The first and second light-shielding blades form physical barriers on both sides of the lens, reducing the spatial opening for the lens to receive external environmental signals, cutting off signal input from non-core areas on both sides of the road, and reducing the physical detection angle of the environmental sensor.

[0008] The zoom beam distribution assembly is installed in the light source cavity of the main lamp arm. The zoom beam distribution assembly includes a light-emitting diode substrate, a composite reflector assembly, a linkage fork, and a reset assembly. The composite reflector assembly includes a lower parabolic reflector cup and an upper cylindrical slide valve baffle. A hollow heat convection chimney channel runs vertically through the interior of the main lamp arm, and heat exchange vents are located on the side walls of the light source cavity. When the central linear push rod moves away from the stepper motor, the annular locking groove on the central linear push rod presses down against the linkage fork and compresses the spring, causing the composite reflector assembly to slide linearly downwards along the linear guide rail.

[0009] During the linear sliding process, the lower parabolic reflector moves away from the LED substrate, changing the relative position of the optical focus, converging the emitted beam and reducing the beam angle of the light distribution curve, redistributing the luminous flux of the emitted beam and concentrating it on the rectangular lighting area directly below the streetlight. Simultaneously, the upper cylindrical slide valve baffle moves downward with the composite reflector assembly, avoiding the heat exchange-related air vent, which then enters a physically connected state. The hot airflow generated by the LED substrate enters the hollow thermal convection chimney channel through the heat exchange-related air vent, rises upward, and is conducted to the heat dissipation substrate on the back of the photovoltaic module. When the stepper motor rotates in the reverse direction, driving the central linear push rod to retract, the spring of the reset assembly pushes the linkage fork and the composite reflector assembly upward to reset, the upper cylindrical slide valve baffle re-blocks the heat exchange-related air vent, and at the same time, the reset torsion spring drives the first and second light-shielding blades to return to their maximum opening angle.

[0010] This invention provides an adaptive dimming solar street light based on photovoltaic energy storage. It has the following beneficial effects: 1. This invention uses a stepper motor to drive a central linear push rod to move linearly. The central linear push rod pushes the prime mover and drives the first and second transmission links, causing the first and second light-shielding blades to rotate and close towards the central axis of the lens. This reduces the space opening for the lens to receive external environmental signals, cuts off signal input from non-core areas on both sides of the road, and ensures that the environmental sensor only responds to the movement of objects in the area directly below the streetlight, avoiding invalid triggering and achieving deep energy saving.

[0011] 2. This invention uses the linear displacement of the central linear push rod to drive the linkage fork downward, which in turn drives the composite reflector component to slide linearly downward along the linear guide rail. This causes the lower secondary parabolic reflector cup to move away from the light-emitting diode substrate, changing the relative position of the optical focus, converging the emitted beam and reducing the beam angle of the light distribution curve. This redistributes and concentrates the luminous flux of the emitted beam on the rectangular lighting area directly below the street light, thereby improving the ground illuminance of the core lighting area.

[0012] 3. In this invention, the upper cylindrical sliding valve baffle moves downward with the composite reflector assembly, avoiding the heat exchange-related air vent, thus enabling the heat exchange-related air vent to enter a physically connected state. The heat exchange-related air vent connects the internal space of the light source chamber with the bottom space of the hollow thermal convection chimney channel. The hot air generated by the operation of the light-emitting diode substrate enters the hollow thermal convection chimney channel through the heat exchange-related air vent, rises upward, and is conducted to the heat dissipation substrate on the back of the photovoltaic module, thereby forming an air convection path when the heat exchange-related air vent is in the connected state. Attached Figure Description

[0013] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is an internal sectional view of the main lamp post of the present invention; Figure 3 This is a schematic diagram of the push rod drive assembly structure of the present invention; Figure 4 This is a schematic diagram showing the relationship between the ball screw and the nut slider of the present invention; Figure 5 This is a schematic diagram of the zoom light distribution assembly of the present invention; Figure 6 This is a schematic diagram of the structure of the sensing and limiting component of the present invention; Figure 7 This is a schematic diagram of the distribution of the light-shielding blades of the present invention; Figure 8 This is a schematic diagram of the prime mover structure of the present invention.

[0014] Among them, 101, photovoltaic module; 110, main light pole; 111, hollow heat convection chimney channel; 120, main light arm; 121, internal cavity; 122, anti-rotation guide rail; 123, light source chamber; 124, heat exchange associated air outlet; 200, push rod drive assembly; 201, stepper motor; 202, ball screw; 203, nut slider; 204, central linear push rod; 2041, guide slider; 2042, zero position baffle; 2043, annular locking groove; 205, zero position photoelectric sensor; 300, sensing limit assembly; 301, ring... 302. Environmental sensor; 303. Lens; 304. Fixed base; 305. First light shield blade; 306. Second light shield blade; 307. First reset torsion spring; 308. Second reset torsion spring; 309. Motion slider; 310. First transmission link; 400. Second transmission link; 401. Zoom light distribution assembly; 402. Light-emitting diode substrate; 402. Composite reflector assembly; 4021. Lower secondary parabolic reflector cup; 4022. Upper cylindrical slide valve baffle; 403. Linear guide rail; 404. Linkage fork; 405. Reset assembly. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] See attached document Figure 1 - Appendix Figure 8 This invention provides an adaptive dimming solar street light based on photovoltaic energy storage, including a photovoltaic module 101, a maximum power point tracking controller, a lithium battery pack, and a battery management system. The photovoltaic module 101 is electrically connected to the maximum power point tracking controller, the maximum power point tracking controller is electrically connected to the lithium battery pack, and the battery management system is electrically connected to the lithium battery pack. The battery management system collects the terminal voltage and charge / discharge current values ​​of the lithium battery pack and calculates the state of charge (SOC) value of the lithium battery pack based on these values.

[0017] This adaptive dimming solar street light also includes a main control unit, which has preset a first-level warning threshold and a second-level extreme threshold. The battery management system sends the state of charge (SOC) value of the lithium battery pack to the main control unit. The main control unit compares the SOC value of the lithium battery pack with the first-level warning threshold and the second-level extreme threshold, and finally outputs an electrical control signal based on the comparison result.

[0018] This adaptive dimming solar street light also includes a main lamp post 110, a main lamp arm 120 mounted at the top of the main lamp post 110, and a mechanical actuator. The mechanical actuator is installed inside the main lamp post 110 and the main lamp arm 120, and includes a push rod drive assembly 200. The push rod drive assembly 200 includes a stepper motor 201, a ball screw 202, and a central linear push rod 204. The stepper motor 201 receives electrical control signals output from the main control unit and drives the ball screw 202 to rotate. The ball screw 202 drives the central linear push rod 204 to move along the internal axial direction of the main lamp arm 120. The linear movement distance of the central linear push rod 204 is determined by the electrical control signals output from the main control unit.

[0019] The mechanical actuator includes a sensing and limiting component 300 and a zoom and light distribution component 400. The central linear push rod 204 is the only power input component of the mechanical actuator, and the central linear push rod 204 is connected to the sensing and limiting component 300 and the zoom and light distribution component 400 through a mechanical structure.

[0020] The sensing and limiting component 300 includes a light-shielding blade. It receives the linear displacement of the central linear push rod 204 and converts this displacement into a closing action of the light-shielding blade, thus reducing the physical detection angle of the environmental sensor 301. The zoom light distribution component 400 includes an optical reflector. It receives the linear displacement of the central linear push rod 204 and converts this displacement into a linear sliding motion of the optical reflector along the perpendicular optical axis, changing the focal length of the light source and reducing the light distribution angle of the emitted beam. When the zoom light distribution component 400 performs this linear sliding motion, it simultaneously releases the physical blockage of the air vents in the convection channel inside the main lamp post 110, allowing the hot air generated by the heating components to flow along the convection channel to the back of the photovoltaic module 101.

[0021] The push rod drive assembly 200 is disposed inside the main lamp arm 120. The push rod drive assembly 200 includes a stepper motor 201, a motor mounting base, a ball screw 202, a nut slider 203, and a central linear push rod 204. The stepper motor 201 is fixedly mounted on the motor mounting base. The motor mounting base is rigidly fixed to the side wall of the internal cavity 121 of the main lamp arm 120. The power output shaft of the stepper motor 201 is coaxially and fixedly connected to the first end of the ball screw 202. The second end of the ball screw 202 is supported in the internal cavity 121 of the main lamp arm 120 by a bearing.

[0022] The central linear push rod 204 has a hollow tubular structure. The ball screw 202 passes through the internal cavity of the central linear push rod 204. The nut slider 203 is fixedly installed in the internal cavity of the central linear push rod 204, and the external thread of the ball screw 202 meshes with the internal thread of the nut slider 203. The side wall of the internal cavity 121 of the main lamp arm 120 is fixedly provided with an anti-rotation guide rail 122 in a direction parallel to the axis of the ball screw 202. The outer wall of the central linear push rod 204 is fixedly provided with a guide slider 2041, which engages in the groove of the anti-rotation guide rail 122. To address the issue of linear thrust failure caused by the circular rotation of the central linear push rod 204 due to thread friction, the anti-rotation guide rail 122 restricts the circumferential rotational freedom of the central linear push rod 204. When the stepper motor 201 drives the ball screw 202 to rotate, the rotational motion of the ball screw 202 is converted into a pure linear displacement of the central linear push rod 204 along the direction of the anti-rotation guide rail 122 through the nut slider 203.

[0023] The linear displacement trajectory of the central linear push rod 204 is divided into three physical calibration states along the axial direction of the main lamp arm 120. The three physical calibration states include the initial zero position, the intermediate adjustment range, and the extreme extension endpoint position. A zero-position photoelectric sensor 205 is fixedly installed in the internal cavity 121 of the main lamp arm 120, and a zero-position baffle 2042 is fixedly installed on the outer wall of the central linear push rod 204.

[0024] When the main control unit receives an electrical signal indicating that the state of charge (SBC) value of the lithium battery pack exceeds the first-level warning threshold, the main control unit controls the stepper motor 201 to rotate in the reverse direction. The reverse rotation of the stepper motor 201 drives the central linear push rod 204 to move closer to the stepper motor 201. The zero-position baffle 2042 blocks the zero-position photoelectric sensor 205. The main control unit receives the trigger signal from the zero-position photoelectric sensor 205 and stops the stepper motor 201. The central linear push rod 204 remains in the initial zero-position state.

[0025] When the main control unit receives an electrical signal that the state of charge of the lithium battery pack is less than or equal to the first-level warning threshold and greater than the second-level extreme threshold, the main control unit controls the stepper motor 201 to rotate forward by the first preset number of pulses, driving the central linear push rod 204 to extend away from the stepper motor 201 and causing the central linear push rod 204 to enter the intermediate adjustment stroke range. The axial displacement of the central linear push rod 204 outputs mechanical thrust outward, and the mechanical thrust drives the sensing limit component 300 and the zoom light distribution component 400 to produce physical displacement.

[0026] When the main control unit receives an electrical signal that the state of charge of the lithium battery pack is less than or equal to the secondary extreme threshold, the main control unit controls the stepper motor 201 to rotate forward by a second preset number of pulses, driving the central linear push rod 204 to the extreme extension end position, so that the sensing limit component 300 and the zoom light distribution component 400 reach the maximum displacement state, and the system enters the deep energy-saving lighting mode.

[0027] The sensing and limiting component 300 is installed at the bottom end of the main lamp arm 120. An environmental sensor 301 and a lens 302 are fixedly installed at the bottom end of the main lamp arm 120. The lens 302 has a hemispherical structure and covers the outside of the receiving end of the environmental sensor 301. A fixing base 303 is fixedly installed at the bottom end of the main lamp arm 120, and the fixing base 303 is arranged around the outer edge of the lens 302.

[0028] The sensing and limiting assembly 300 includes a first light-shielding blade 304 and a second light-shielding blade 305, which are symmetrical quarter-spherical thin-shell structures. A first rotating shaft and a second rotating shaft are mounted on the fixed base 303, with the axes of the first and second rotating shafts parallel to each other. The axes of the first and second rotating shafts are perpendicular to the axial movement direction of the central linear push rod 204.

[0029] The root of the first light-shielding blade 304 is hinged to the fixed base 303 via a first pivot, and the root of the second light-shielding blade 305 is hinged to the fixed base 303 via a second pivot. A first return torsion spring 306 is fitted onto the outer side of the first pivot, with its first end fixed to the fixed base 303 and its second end fixed to the inner wall of the first light-shielding blade 304. A second return torsion spring 307 is fitted onto the outer side of the second pivot, with its first end fixed to the fixed base 303 and its second end fixed to the inner wall of the second light-shielding blade 305. The first return torsion spring 306 applies an outward opening torque to the first light-shielding blade 304, and the second return torsion spring 307 applies an outward opening torque to the second light-shielding blade 305.

[0030] The sensing and limiting assembly 300 includes a prime mover 308, a first transmission link 309, and a second transmission link 310. The prime mover 308 is fixedly connected to the front end of the central linear push rod 204, and moves synchronously with the central linear push rod 204. The first end of the first transmission link 309 is connected to the prime mover 308 via a first hinge pin to form a first rotary joint, and the second end of the first transmission link 309 is connected to the outer wall of the first light shield blade 304 via a second hinge pin to form a second rotary joint. The first end of the second transmission link 310 is connected to the prime mover 308 via a third hinge pin to form a third rotary joint, and the second end of the second transmission link 310 is connected to the outer wall of the second light shield blade 305 via a fourth hinge pin to form a fourth rotary joint.

[0031] When the central linear push rod 204 undergoes linear displacement in a direction away from the stepper motor 201, it pushes the prime mover 308 forward, thereby displacing the first transmission link 309 and the second transmission link 310. The first transmission link 309 overcomes the torque of the first return torsion spring 306 and pushes the first light shield blade 304 to rotate around the central axis of the first rotating lens 302. The second transmission link 310 overcomes the torque of the second return torsion spring 307 and pushes the second light shield blade 305 to rotate around the central axis of the second rotating lens 302.

[0032] The first light-shielding blade 304 and the second light-shielding blade 305 rotate and close towards the central axis of the lens 302, forming physical shields on both sides of the lens 302. These physical shields reduce the spatial opening of the lens 302 for receiving external environmental signals to a single, elongated opening facing directly below the road surface. The physical shields cut off signal input from non-core areas on both sides of the road, so the environmental sensor 301 only responds to the movement of objects directly below it.

[0033] A zoom beam distribution assembly 400 is installed inside the light source chamber 123 of the main lamp arm 120. A light-emitting diode substrate 401 is fixedly mounted on the inner wall of the light source chamber 123 of the main lamp arm 120, and a composite reflector assembly 402 is sleeved on the outside of the light-emitting diode substrate 401. The composite reflector assembly 402 includes a lower parabolic reflector cup 4021 and an upper cylindrical slide valve baffle 4022. The top edge of the lower parabolic reflector cup 4021 is integrally formed and connected to the bottom edge of the upper cylindrical slide valve baffle 4022.

[0034] A linear guide rail 403 is fixedly installed on the inner wall of the light source chamber 123 of the main lamp arm 120 in a direction parallel to the main optical axis. A sliding groove is provided on the side surface of the composite reflector 402. The sliding groove is slidably engaged with the linear guide rail 403 and restricts the composite reflector 402 to slide linearly only in a direction parallel to the main optical axis. A hollow heat convection chimney channel 111 is vertically opened through the interior of the main lamp pole 110. The top of the hollow heat convection chimney channel 111 extends to the heat dissipation substrate on the back of the photovoltaic module 101. A heat exchange associated air vent 124 is opened on the side wall of the light source chamber 123 of the main lamp arm 120. The heat exchange associated air vent 124 connects the internal space of the light source chamber 123 with the bottom space of the hollow heat convection chimney channel 111.

[0035] The zoom light distribution assembly 400 includes a linkage fork 404 and a reset assembly 405. The bottom end of the linkage fork 404 is fixedly connected to the top of the composite reflector 402, and the top end of the linkage fork 404 abuts against the annular engagement groove 2043 on the outer side of the central linear push rod 204. The reset assembly 405 includes a spring and a baffle. The baffle is fixedly installed on the side wall of the linkage fork 404, and the two ends of the spring abut against the baffle and the linear guide rail 403, respectively. When the central linear push rod 204 moves away from the stepper motor 201, the top inclined surface of the linkage fork 404 is squeezed by the annular engagement groove 2043, converting the horizontal linear thrust into a vertical downward force, pushing the linkage fork 404 downward and compressing the spring. When the central linear push rod 204 approaches the stepper motor 201, the reset assembly 405 pushes the downward-moving linkage fork 404 back up and resets it through the spring and the baffle.

[0036] When the central linear push rod 204 is in the initial zero position, the composite reflector 402 is located close to the light-emitting diode substrate 401. The side wall of the upper cylindrical slide valve baffle 4022 blocks the heat exchange associated air vent 124, cutting off the air convection path between the light source chamber 123 and the hollow heat convection chimney channel 111.

[0037] When the central linear push rod 204 moves away from the stepper motor 201, it drives the composite reflector 402 to slide downwards along the linear guide rail 403 via the linkage fork 404. The lower parabolic reflector cup 4021 and the upper cylindrical slide valve baffle 4022 move downwards synchronously. The lower parabolic reflector cup 4021 moves away from the light-emitting diode substrate 401 and changes the relative position of the optical focus, converging the emitted beam and reducing the beam angle of the light distribution curve, redistributing the luminous flux of the emitted beam and concentrating it on the rectangular lighting area directly below the street light. The upper cylindrical slide valve baffle 4022 moves downward with the composite reflector 402 and avoids the heat exchange associated air vent 124. The heat exchange associated air vent 124 enters the physical conduction state. The hot air generated by the operation of the light-emitting diode substrate 401 enters the hollow hot convection chimney channel 111 through the heat exchange associated air vent 124, rises upward and is conducted to the heat dissipation substrate on the back of the photovoltaic module 101.

[0038] Working principle: The photovoltaic module 101 charges the lithium battery pack through the maximum power point tracking controller. The battery management system collects the terminal voltage and charging / discharging current of the lithium battery pack in real time, calculates the state of charge value, and sends it to the main control unit. The main control unit compares this value with the preset first-level warning threshold and second-level extreme value threshold, and outputs electrical control signals to the stepper motor 201 based on the comparison results.

[0039] Stepper motor 201 receives a signal and drives ball screw 202 to rotate. Guide slider 2041 engages with anti-rotation guide rail 122 to restrict the rotation of central linear push rod 204, so that the rotational motion of ball screw 202 is converted into linear displacement of central linear push rod 204 through nut slider 203. This linear displacement is divided into initial zero position, intermediate adjustment stroke range and extreme extension end position by the cooperation of zero position photoelectric sensor 205 and zero position baffle 2042.

[0040] When the state of charge value exceeds the first-level warning threshold, the main control unit controls the stepper motor 201 to rotate in the opposite direction, and the central linear push rod 204 retracts until the zero-position baffle 2042 blocks the zero-position photoelectric sensor 205, at which point the motor stops, and the push rod remains in the initial zero-position state. At this time, the first light-shielding blade 304 and the second light-shielding blade 305 maintain their maximum opening angle under the action of the reset torsion spring; the reset assembly 405 uses the spring force to push the linkage fork 404 to the top, the composite reflector 402 is close to the light-emitting diode substrate 401, and the upper cylindrical slide valve baffle 4022 blocks the heat exchange associated air vent 124.

[0041] When the state of charge value is less than or equal to the first-level warning threshold and greater than the second-level extreme threshold, the stepper motor 201 rotates forward for the first preset number of pulses, and the central linear push rod 204 extends into the intermediate adjustment stroke range. On one hand, the central linear push rod 204 pushes the prime mover 308 forward, which overcomes the torque of the torsion spring through the transmission link, causing the first light shield blade 304 and the second light shield blade 305 to rotate and close towards the central axis, reducing the opening of the lens 302. On the other hand, the annular locking groove 2043 on the central linear push rod 204 presses down on the linkage fork 404 and compresses the spring, causing the composite reflector assembly 402 to slide linearly downward along the linear guide rail 403; the lower secondary parabolic reflector cup 4021 moves away from the light-emitting diode substrate 401, and the upper cylindrical slide valve baffle 4022 moves downward accordingly and avoids the heat exchange associated air vent 124, opening the airflow channel. During reset, the stepper motor 201 reverses to retract the push rod, and the reset assembly 405 uses a spring to push the linkage fork 404 and the composite reflector assembly 402 upwards to return them to their original positions.

[0042] When the state of charge value is less than or equal to the secondary extreme threshold, the stepper motor 201 continues to rotate forward for the second preset number of pulses, and the central linear push rod 204 extends to the extreme extension endpoint position. At this time, the first light shield blade 304 and the second light shield blade 305 reach the maximum closing angle; the composite reflector assembly 402 completes the downward linear sliding of its maximum stroke. After the displacement is completed, the main control unit cuts off the power supply to the stepper motor 201, and the system maintains this mechanical displacement state.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adaptive dimming solar street light based on photovoltaic energy storage, characterized in that, It includes a main lamp post (110), a main lamp arm (120), and a mechanical actuator; the mechanical actuator includes a push rod drive assembly (200), a sensing and limiting assembly (300), and a zoom light distribution assembly (400). The push rod drive assembly (200) includes a stepper motor (201), a ball screw (202), and a central linear push rod (204). The stepper motor (201) drives the ball screw (202) to rotate, and the ball screw (202) drives the central linear push rod (204) to generate linear displacement. The sensing and limiting component (300) includes a light shield blade and an environmental sensor (301). The sensing and limiting component (300) converts the linear displacement of the central linear push rod (204) into the closing action of the light shield blade, which is used to reduce the physical detection angle of the environmental sensor (301). The zoom light distribution assembly (400) includes an optical reflector, and the zoom light distribution assembly (400) converts linear displacement into linear sliding of the optical reflector along the direction perpendicular to the optical axis; The sensing and limiting component (300) is installed at the bottom end of the main lamp arm (120). The environmental sensor (301) and lens (302) are fixedly installed at the bottom end of the main lamp arm (120). The lens (302) has a hemispherical structure and covers the outside of the receiving end of the environmental sensor (301). A fixing base (303) is fixedly installed at the bottom end of the main lamp arm (120), and the fixing base (303) is arranged around the outer edge of the lens (302). The light shield blades include a first light shield blade (304) and a second light shield blade (305), wherein the first light shield blade (304) and the second light shield blade (305) are in a symmetrical quarter-spherical thin shell structure. The fixed base (303) is provided with a first rotating shaft and a second rotating shaft. The axis of the first rotating shaft is parallel to the axis of the second rotating shaft. The root of the first light shield blade (304) is hinged to the fixed base (303) through the first rotating shaft, and the root of the second light shield blade (305) is hinged to the fixed base (303) through the second rotating shaft. A first reset torsion spring (306) is fitted on the outer side of the first rotating shaft, and a second reset torsion spring (307) is fitted on the outer side of the second rotating shaft. The sensing and limiting component (300) includes a prime mover (308), a first transmission link (309), and a second transmission link (310). The prime mover (308) is fixedly connected to the front end of the central linear push rod (204). The first end of the first transmission link (309) is connected to the prime mover (308) through a first hinge pin to form a first rotary joint. The second end of the first transmission link (309) is connected to the outer side wall of the first light shield blade (304) through a second hinge pin to form a second rotary joint. The first end of the second transmission link (310) is connected to the prime mover (308) through a third hinge pin to form a third rotary joint. The second end of the second transmission link (310) is connected to the outer side wall of the second light shield blade (305) through a fourth hinge pin to form a fourth rotary joint.

2. The adaptive dimming solar street light based on photovoltaic energy storage according to claim 1, characterized in that, The push rod drive assembly (200) is disposed inside the main lamp arm (120), and the push rod drive assembly (200) includes a motor mounting base and a nut slider (203). The main lamp arm (120) has an internal cavity (121). The stepper motor (201) is fixedly installed on the side wall of the internal cavity (121). The power output shaft of the stepper motor (201) is coaxially fixedly connected to the first end of the ball screw (202). The second end of the ball screw (202) is supported in the internal cavity (121) by a bearing. The central linear push rod (204) has a hollow tubular structure. The ball screw (202) passes through the internal cavity of the central linear push rod (204). The nut slider (203) is fixedly installed in the internal cavity of the central linear push rod (204). The external thread of the ball screw (202) is engaged with the internal thread of the nut slider (203).

3. The adaptive dimming solar street light based on photovoltaic energy storage according to claim 2, characterized in that, The inner cavity (121) has an anti-rotation guide rail (122) fixedly installed on its side wall in a direction parallel to the axis of the ball screw (202). The outer side wall of the central linear push rod (204) has a guide slider (2041) fixedly installed. The guide slider (2041) is slidably connected inside the anti-rotation guide rail (122).

4. The adaptive dimming solar street light based on photovoltaic energy storage according to claim 1, characterized in that, The zoom light distribution assembly (400) is installed in the light source chamber (123) of the main lamp arm (120). A light-emitting diode substrate (401) is fixedly installed on the inner wall of the light source chamber (123), and a composite reflector assembly (402) is sleeved on the outside of the light-emitting diode substrate (401). The optical reflector is a lower parabolic reflector (4021). The composite reflector assembly (402) includes the lower parabolic reflector (4021) and an upper cylindrical slide valve baffle (4022). The top edge of the lower parabolic reflector (4021) is integrally formed and connected to the bottom edge of the upper cylindrical slide valve baffle (4022).

5. The adaptive dimming solar street light based on photovoltaic energy storage according to claim 4, characterized in that, The inner wall of the light source chamber (123) is fixedly provided with a linear guide rail (403) in a direction parallel to the main optical axis. The side surface of the composite reflector (402) is provided with a sliding groove, and the linear guide rail (403) is slidably connected inside the sliding groove.

6. The adaptive dimming solar street light based on photovoltaic energy storage according to claim 5, characterized in that, The zoom light distribution assembly (400) includes a linkage fork (404) and a reset assembly (405). The bottom end of the linkage fork (404) is fixedly connected to the top of the composite reflector assembly (402), and the top end of the linkage fork (404) abuts against the annular engagement groove (2043) on the outside of the central linear push rod (204). The reset assembly (405) includes a spring and a baffle. The baffle is fixedly installed on the side wall of the linkage fork (404), and the two ends of the spring are located between the baffle and the linear guide rail (403), respectively.

7. The adaptive dimming solar street light based on photovoltaic energy storage according to claim 6, characterized in that, The main lamp post (110) has a hollow heat convection chimney channel (111) that runs vertically through its interior. The side wall of the light source chamber (123) has a heat exchange associated air vent (124) that connects the interior space of the light source chamber (123) with the bottom space of the hollow heat convection chimney channel (111).

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