Wind, light and data storage integrated signal tower carrying vertical fan

By mounting a combination of vertical fan and annular windshield on the signal tower, the dual-axis motor drives the wire rope retracting and movable seat translation, the problem of difficulty for signal tower staff to climb in strong winds and improve the tower body Wind and earthquake resistance.

CN119288266AInactive Publication Date: 2025-01-10ZHONGCAI SUPPLY CHAIN (WUHAN) CO LTD +1

Patent Information

Application Number
CN202411432792.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-14
Publication Date
2025-01-10
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing signal towers are susceptible to wind when climbing in windy weather, resulting in the risk of difficulty climbing or falling.

Method used

A signal tower equipped with vertical fan is designed to integrate wind and light storage numbers. It adopts a combination of an annular windshield plate and a driving member. The wire rope is coiled and released through a dual-axis motor. The movable seat is translated to allow the annular windshield plate to enclose the staff. , reduce the influence of wind force; at the same time, the shock absorber and oblique strut structure improve the tower's wind resistance.

Benefits of technology

It effectively avoids the problem of staff climbing or falling due to wind force, and improves the wind and earthquake resistance of the signal tower.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of signal towers, and provides a wind and light storage and data storage integrated signal tower carrying a vertical fan, which comprises a tower body, a supporting assembly arranged at the bottom of the tower body, a working assembly arranged at the top of the tower body, and a plurality of climbing rods fixedly connected to the outer side of the tower body, a hanging assembly used for hanging a safety rope hanging buckle is arranged on one side of the tower body, an operation platform is fixedly connected to the top of the tower body, a windproof assembly is arranged at the bottom of the operation platform and comprises two guide rods, the two guide rods are fixedly connected to the two ends of the bottom of the operation platform respectively, and movable seats are slidably connected to the two guide rods. An annular wind shield is fixedly connected between the two movable seats and arranged on the outer side of the tower body in a sleeving mode, and driving pieces used for driving the movable seats to horizontally move in the vertical direction are arranged at the top ends of the movable seats. The annular wind shield can surround the outer side of a worker, and the problem that the worker is difficult to climb or fall due to the influence of wind power is solved.
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Description

Technical Field

[0001] The present invention relates to the technical field of signal towers, and in particular to a signal tower that integrates wind, solar, and storage with a vertical wind turbine. Background Art

[0002] A signal tower is a wireless signal transmitting device built by a network operator. It is also a form of public radio station. It refers to a radio transceiver station that transmits information to mobile phone terminals through a communication exchange center in a certain radio coverage area. It also currently serves as a signal transmission base point for urban WIFI.

[0003] After searching, the Chinese patent publication number CN205100636U discloses "a signal tower, including a tower body, a current-limiting lightning rod, a grounding wire and a combined foundation stone, the bottom of the tower body is arranged on the combined foundation stone, the bottom of the tower body is provided with a grounding wire, the current-limiting lightning rod is arranged on the top of the tower body, the combined foundation stone includes a plurality of column units, the plurality of column units are detachably connected together, the column units are rectangular, and the plurality of column units are connected together by screws."

[0004] There are some technical defects in the implementation of this type of patent. Among them, this patent sets the ladder as a detachable ladder. Although it is convenient to disassemble during installation and maintenance, the staff needs to climb the ladder when inspecting the working components on the top of the tower. When the weather is windy, since there are no wind protection measures on this type of signal tower, the staff will be affected by the wind and have difficulty in climbing. Once the wind is too strong, the staff may lose balance and risk falling. In view of this, the present invention proposes a signal tower equipped with a vertical wind turbine that integrates wind, solar and storage. Summary of the invention

[0005] The present invention proposes a signal tower that integrates wind, solar and data storage and is equipped with a vertical wind turbine, which solves the problem in the prior art that workers are easily affected by wind during the climbing process, causing difficulty in climbing.

[0006] The technical solution of the present invention is as follows: A signal tower equipped with a vertical wind turbine and integrating wind, solar and storage, comprises a tower body, a supporting assembly for supporting the tower body is arranged at the bottom of the tower body, a working assembly is arranged at the top of the tower body, a plurality of climbing rods are fixedly connected to the outer side of the tower body, and the plurality of climbing rods are equidistantly distributed along the vertical direction, a hanging assembly for hanging a safety rope buckle is arranged on one side of the tower body, an operating platform is fixedly connected to the top of the tower body, a windproof assembly is arranged at the bottom of the operating platform, the windproof assembly comprises two parallel guide rods, the two guide rods are respectively fixedly connected to the two ends of the bottom of the operating platform, the two guide rods are slidably connected to a movable seat, an annular wind shield plate is fixedly connected between the two movable seats, the annular wind shield plate is sleeved on the outer side of the tower body, and a driving member for driving the movable seat to translate in the vertical direction is arranged on the top of the movable seat.

[0007] Preferably, an annular guardrail is fixedly connected to the outer edge of the top of the operating platform, and an access groove is opened on the top of the operating platform, and the access groove is located directly above the climbing rod.

[0008] Preferably, the supporting assembly includes a base, the top inner side of the base is slidably connected to a movable seat, the top of the movable seat is fixedly connected to the bottom of the tower body, the bottom of the movable seat is fixedly connected to a plurality of shock absorbers, the plurality of shock absorbers are equidistantly distributed along the length direction of the movable seat, and both ends of the bottom of the movable seat are provided with auxiliary support members for diagonally supporting the movable seat.

[0009] Preferably, the auxiliary support member includes a fixed plate, the fixed plate is fixedly connected to one end of the inner side of the base, one side of the fixed plate is fixedly connected to a fixed rod arranged in a horizontal direction, a slider is slidably connected to the fixed rod, the top of the slider is hinged with a diagonal support rod, and the top of the diagonal support rod is hinged to one end of the bottom of the movable seat.

[0010] Preferably, the auxiliary support member further comprises a spring, wherein the spring is sleeved on the fixing rod, one end of the spring abuts against the sliding block, and the other end of the spring abuts against the inner wall of the base.

[0011] Preferably, the driving member includes a dual-axis motor, which is fixedly mounted on one end of the top of the base, and the two output shafts of the dual-axis motor are fixedly connected to a winding drum, and steel wire ropes are wound on the two winding drums, and the ends of the two steel wire ropes away from the winding drums are fixedly connected to corresponding movable seats, and both ends of the bottom of the operating platform are rotatably connected to fixed pulley one and fixed pulley two for guiding the steel wire ropes.

[0012] Preferably, the diameters of the fixed pulley 1 and the fixed pulley 2 are the same, and the center lines of the fixed pulley 1 and the fixed pulley 2 are at the same height.

[0013] Preferably, the hanging assembly includes two parallel cross bars, the two cross bars are respectively fixedly connected to the two ends of the tower body, a vertical bar is fixedly connected between the two cross bars, one side of the vertical bar is fixedly connected to a plurality of hanging rods, and the plurality of hanging rods are equidistantly distributed along the vertical direction.

[0014] Preferably, the plurality of hanging rods are inclined structures, the bottom ends of the hanging rods are fixedly connected to the vertical rods, and the distance between the top ends of the hanging rods and the outer wall of the tower body is greater than the diameter of the safety rope buckle.

[0015] Preferably, the working component includes a vertical fan that generates electricity through wind power, the vertical fan is fixedly connected to one end of the top of the tower body, the other end of the top of the tower body is fixedly connected to a mounting frame, the outer side of the mounting frame is fixedly connected to a photovoltaic panel, and the outer wall of the tower body is fixedly connected to multiple cameras and sensors for collecting data.

[0016] The working principle and beneficial effects of the present invention are:

[0017] 1. When the staff climbs up through the climbing pole, the driving member drives the movable seat to move upward, so that the movable seat moves along with the body position of the staff, so that the annular wind shield is always surrounded on the outside of the staff, so that the annular wind shield can block the wind and prevent the staff from being affected by the wind and causing difficulty in climbing or falling;

[0018] 2. The movable seat can be vertically buffered by the shock absorber, which reduces the impact force on the tower body in the event of an earthquake and keeps the tower body stable. At the same time, when the tower body is subjected to lateral wind force, a stable triangular structure is formed between the diagonal support rod, the fixed rod and the tower body, which can greatly improve the wind resistance of the tower body. At the same time, the diagonal support rod will act on the slider to make it slide, which makes the slider exert pressure on the spring, which makes the spring compressed to produce reverse elastic force, so that the spring exerts reverse buffering force on the slider, which is then transmitted to the tower body through the diagonal support rod, thereby laterally buffering the tower body and further improving the lateral wind resistance of the tower body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of a signal tower equipped with a vertical wind turbine and integrating wind, solar and data storage according to the present invention;

[0021] Figure 2 It is a partial structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the windproof assembly of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the support assembly of the present invention;

[0024] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part A;

[0025] Figure 6 It is a schematic structural diagram of a driving member of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the hanging assembly of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the working components of the present invention.

[0028] In the figure: 1. Support assembly; 11. Base; 12. Movable seat; 13. Shock absorber; 14. Auxiliary support; 141. Fixed plate; 142. Fixed rod; 143. Sliding block; 144. Diagonal support rod; 145. Spring; 2. Tower body; 3. Operating platform; 31. Access slot; 4. Climbing rod; 5. Hanging assembly; 51. Vertical rod; 52. Cross rod; 53. Hanging rod; 6. Windproof assembly; 61. Guide rod; 62. Movable seat; 63. Annular wind shield; 64. Driving member; 641. Dual-axis motor; 642. Winding drum; 643. Wire rope; 644. Fixed pulley one; 645. Fixed pulley two; 7. Guardrail; 8. Working assembly; 81. Vertical fan; 82. Mounting frame; 83. Photovoltaic panel; 84. Camera; 85. Sensor; 9. Safety rope buckle. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8As shown, this embodiment proposes a signal tower equipped with a vertical wind turbine and integrating wind, solar and data storage, including a tower body 2, a support assembly 1 for supporting the tower body 2 is arranged at the bottom of the tower body 2, a working assembly 8 is arranged at the top of the tower body 2, a plurality of climbing rods 4 are fixedly connected to the outer side of the tower body 2, and the plurality of climbing rods 4 are evenly distributed along the vertical direction, a hanging assembly 5 for hanging a safety rope buckle 9 is arranged on one side of the tower body 2, an operating platform 3 is fixedly connected to the top of the tower body 2, a circular guardrail 7 is fixedly connected to the outer edge of the top of the operating platform 3, and the top of the operating platform 3 is An access groove 31 is provided at the bottom of the tower body 2, and the access groove 31 is located just above the climbing rod 4. A windproof component 6 is provided at the bottom of the operating platform 3, and the windproof component 6 includes two parallel guide rods 61, and the two guide rods 61 are respectively fixedly connected to the two ends of the bottom of the operating platform 3, and the two guide rods 61 are slidably connected with movable seats 62, and an annular wind shield plate 63 is fixedly connected between the two movable seats 62, and the annular wind shield plate 63 is sleeved on the outer side of the tower body 2. The top of the movable seat 62 is provided with a driving member 64 for driving the movable seat 62 to translate in the vertical direction.

[0031] When the staff climbs up through the climbing pole 4, the driving member 64 drives the movable seat 62 to translate upward, so that the movable seat 62 translates following the body position of the staff, which makes the annular wind shield 63 always surround the outside of the staff, so that the annular wind shield 63 can block the wind and prevent the staff from being affected by the wind and causing difficulty in climbing or falling.

[0032] Furthermore, the support assembly 1 includes a base 11, a movable seat 12 is slidably connected to the top of the inner side of the base 11, the top of the movable seat 12 is fixedly connected to the bottom of the tower body 2, a plurality of shock absorbers 13 are fixedly connected to the bottom of the movable seat 12, and the plurality of shock absorbers 13 are equidistantly distributed along the length direction of the movable seat 12, and both ends of the bottom of the movable seat 12 are provided with auxiliary support members 14 for diagonally supporting the movable seat 12, the auxiliary support members 14 include a fixed plate 141, the fixed plate 141 is fixedly connected to one end of the inner side of the base 11, one side of the fixed plate 141 is fixedly connected to a fixed rod 142 arranged in the horizontal direction, a slider 143 is slidably connected to the fixed rod 142, a diagonal support rod 144 is hinged to the top of the slider 143, and the top of the diagonal support rod 144 is hinged to one end of the bottom of the movable seat 12, a spring 145 is sleeved on the fixed rod 142, one end of the spring 145 is in contact with the slider 143, and the other end of the spring 145 is in contact with the inner wall of the base 11.

[0033] The movable seat 12 can be vertically buffered by the shock absorber 13, so as to reduce the impact force on the tower body 2 in the event of an earthquake, so that the tower body 2 remains stable. At the same time, when the tower body 2 is subjected to lateral wind force, a stable triangular structure is formed between the diagonal support rod 144, the fixed rod 142 and the tower body 2, so that the wind resistance of the tower body 2 can be greatly improved. At the same time, the diagonal support rod 144 will act on the slider 143 to make it slide, which makes the slider 143 apply pressure to the spring 145, which makes the spring 145 compressed to produce a reverse elastic force, so that the spring 145 applies a reverse buffering force to the slider 143, which is then transmitted to the tower body 2 through the diagonal support rod 144, so that the tower body 2 can be laterally buffered, and the lateral wind resistance of the tower body 2 is further improved.

[0034] Furthermore, the driving member 64 includes a dual-axis motor 641, which is fixedly installed at one end of the top of the base 11, and the two output shafts of the dual-axis motor 641 are fixedly connected to a winding drum 642, and the two winding drums 642 are both wound with steel wire ropes 643, and the ends of the two steel wire ropes 643 away from the winding drums 642 are fixedly connected to the corresponding movable seat 62, and the two ends of the bottom of the operating platform 3 are rotatably connected to a fixed pulley 1 644 and a fixed pulley 2 645 for guiding the steel wire ropes 643, and the diameters of the fixed pulley 1 644 and the fixed pulley 2 645 are the same, and the center lines of the fixed pulley 1 644 and the fixed pulley 2 645 are at the same height.

[0035] By starting the dual-axis motor 641, the two winding drums 642 rotate synchronously, so that the winding and releasing of the wire rope 643 can be realized. When the staff climbs up through the climbing pole 4, the dual-axis motor 641 drives the two winding drums 642 to wind up the wire rope 643, and under the guidance of the fixed pulley 1 644 and the fixed pulley 2 645, the wire rope 643 applies an upward pulling force to the corresponding movable seat 62, which makes the two movable seats 62 move upward synchronously, and also makes the annular wind shield plate 63 slide upward. When the annular wind shield 63 slides upward, it always surrounds the outside of the staff, which makes the annular wind shield 63 able to block the wind; when the staff climbs down through the climbing pole 4, the two winding drums 642 are driven by the dual-axis motor 641 to release the wire rope 643, and the annular wind shield 63 slowly slides downward under the action of gravity, and at the same time, the annular wind shield 63 always surrounds the outside of the staff when sliding downward, so as to prevent the staff from being affected by the wind and causing difficulty in climbing or falling.

[0036] Further, the hanging assembly 5 includes two parallel horizontal bars 52, the two horizontal bars 52 are fixedly connected to the two ends of the tower body 2, a vertical bar 51 is fixedly connected between the two horizontal bars 52, a plurality of hanging bars 53 are fixedly connected to one side of the vertical bar 51, the plurality of hanging bars 53 are evenly distributed in the vertical direction, and the plurality of hanging bars 53 are all inclined structures, the bottom end of the hanging bar 53 is fixedly connected to the vertical bar 51, and the distance between the top end of the hanging bar 53 and the outer wall of the tower body 2 is greater than the diameter of the safety rope hanging buckle 9. When the staff climbs up or down through the climbing rod 4, the staff can hang the safety rope hanging buckle 9 on the upper hanging bar 53. As the height of the staff changes, the staff can directly translate the safety rope hanging buckle 9 upward or downward from the gap between the hanging bar 53 and the tower body 2 to change the height of the safety rope hanging buckle 9. This process does not require the staff to repeatedly remove and install the safety rope hanging buckle 9, which is not only more convenient to operate, but also improves safety.

[0037] Furthermore, the working component 8 includes a vertical fan 81 for generating electricity through wind power, the vertical fan 81 is fixedly connected to one end of the top of the tower body 2, the other end of the top of the tower body 2 is fixedly connected to a mounting frame 82, the outside of the mounting frame 82 is fixedly connected to a photovoltaic panel 83, and the outer wall of the tower body 2 is fixedly connected to multiple cameras 84 and sensors 85 for collecting data. The vertical fan 81 can generate electricity under the action of wind, and the photovoltaic panel 83 can generate electricity under the action of light. The vertical fan 81 has low wind noise and large power generation, and the photovoltaic panel 83 has high light collection efficiency. The sensors 85 and cameras 84 installed on the tower body 2 are used to collect data from the data twin bottom plate.

[0038] Working principle: when the staff climbs upward through the climbing pole 4, the two winding drums 642 are driven by the dual-axis motor 641 to wind up the wire rope 643, and under the guidance of the fixed pulley 1 644 and the fixed pulley 2 645, the wire rope 643 applies an upward pulling force to the corresponding movable seat 62, which makes the two movable seats 62 move upward synchronously, and also makes the annular wind shield 63 slide upward. When the annular wind shield 63 slides upward, it always surrounds the outside of the staff, which makes the annular wind shield 63 block the wind. At the same time, the staff can hang the safety rope buckle 9 on the upper hanging rod 53. As the height of the staff changes, the staff can directly translate the safety rope buckle 9 upward from the gap between the hanging rod 53 and the tower body 2 to change the height of the safety rope buckle 9;

[0039] When the staff climbs down through the climbing pole 4, the two winding drums 642 are driven by the dual-axis motor 641 to pay out the wire rope 643, and the annular wind shield 63 slowly slides downward under the action of gravity. At the same time, the annular wind shield 63 always surrounds the outside of the staff when sliding downward, avoiding the staff from being affected by the wind and causing difficulty in climbing or falling. At the same time, the staff can hang the safety rope buckle 9 on the upper hanging rod 53. As the height of the staff changes, the staff can directly move the safety rope buckle 9 downward from the gap between the hanging rod 53 and the tower body 2 to change the height of the safety rope buckle 9.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A signal tower with wind, solar and data storage integrated and equipped with a vertical wind turbine, comprising a tower body (2), a support assembly (1) for supporting the tower body (2) being arranged at the bottom of the tower body (2), a working assembly (8) being arranged at the top of the tower body (2), a plurality of climbing rods (4) being fixedly connected to the outer side of the tower body (2), the plurality of climbing rods (4) being equidistantly distributed along the vertical direction, and characterized in that: A hanging assembly (5) for hanging a safety rope hook (9) is provided on one side of the tower body (2); an operating platform (3) is fixedly connected to the top of the tower body (2); a windproof assembly (6) is provided at the bottom of the operating platform (3); the windproof assembly (6) comprises two parallel guide rods (61); the two guide rods (61) are respectively fixedly connected to the two ends of the bottom of the operating platform (3); a movable seat (62) is slidably connected to the two guide rods (61); an annular wind shield plate (63) is fixedly connected between the two movable seats (62); the annular wind shield plate (63) is sleeved on the outer side of the tower body (2); and a driving member (64) for driving the movable seat (62) to translate in a vertical direction is provided at the top of the movable seat (62).

2. The wind, solar and data storage integrated signal tower equipped with a vertical wind turbine according to claim 1, characterized in that: An annular guardrail (7) is fixedly connected to the outer edge of the top of the operating platform (3), and an access groove (31) is provided on the top of the operating platform (3), wherein the access groove (31) is located directly above the climbing pole (4).

3. The wind, solar and data storage integrated signal tower equipped with a vertical wind turbine according to claim 1, characterized in that: The support assembly (1) comprises a base (11), the top of the inner side of the base (11) is slidably connected to a movable seat (12), the top of the movable seat (12) is fixedly connected to the bottom of the tower body (2), the bottom of the movable seat (12) is fixedly connected to a plurality of shock absorbers (13), the plurality of shock absorbers (13) are equidistantly distributed along the length direction of the movable seat (12), and auxiliary support members (14) for diagonally supporting the movable seat (12) are provided at both ends of the bottom of the movable seat (12).

4. The wind, solar and data storage integrated signal tower equipped with a vertical wind turbine according to claim 3, characterized in that: The auxiliary support member (14) comprises a fixed plate (141), wherein the fixed plate (141) is fixedly connected to one end of the inner side of the base (11), and one side of the fixed plate (141) is fixedly connected to a fixed rod (142) arranged in a horizontal direction, and a slider (143) is slidably connected to the fixed rod (142), and the top of the slider (143) is hinged to an oblique support rod (144), and the top end of the oblique support rod (144) is hinged to one end of the bottom of the movable seat (12).

5. The wind, solar and data storage integrated signal tower equipped with a vertical wind turbine according to claim 4, characterized in that: The auxiliary support member (14) further comprises a spring (145), wherein the spring (145) is sleeved on the fixing rod (142), one end of the spring (145) abuts against the slider (143), and the other end of the spring (145) abuts against the inner wall of the base (11).

6. The wind, solar and data storage integrated signal tower equipped with a vertical wind turbine according to claim 3, characterized in that: The driving member (64) comprises a dual-axis motor (641), wherein the dual-axis motor (641) is fixedly mounted on one end of the top of the base (11), wherein the two output shafts of the dual-axis motor (641) are fixedly connected to a winding drum (642), and steel wire ropes (643) are wound on the two winding drums (642), and the ends of the two steel wire ropes (643) away from the winding drums (642) are fixedly connected to the corresponding movable seat (62), and the two ends of the bottom of the operating platform (3) are rotatably connected to a fixed pulley 1 (644) and a fixed pulley 2 (645) for guiding the steel wire ropes (643).

7. The wind, solar and data storage integrated signal tower equipped with a vertical wind turbine according to claim 6, characterized in that: The diameters of the fixed pulley 1 (644) and the fixed pulley 2 (645) are the same, and the center lines of the fixed pulley 1 (644) and the fixed pulley 2 (645) are at the same height.

8. The wind, solar, and data storage integrated signal tower equipped with a vertical wind turbine according to claim 1, characterized in that: The hanging assembly (5) comprises two parallel horizontal bars (52), the two horizontal bars (52) are respectively fixedly connected to the two ends of the tower body (2), a vertical bar (51) is fixedly connected between the two horizontal bars (52), and a plurality of hanging bars (53) are fixedly connected to one side of the vertical bar (51), and the plurality of hanging bars (53) are equidistantly distributed in the vertical direction.

9. The wind, solar and data storage integrated signal tower equipped with a vertical wind turbine according to claim 8, characterized in that: The plurality of hanging rods (53) are all inclined structures, the bottom ends of the hanging rods (53) are fixedly connected to the vertical rods (51), and the distance between the top ends of the hanging rods (53) and the outer wall of the tower body (2) is greater than the diameter of the safety rope hook (9).

10. The wind, solar, and data storage integrated signal tower equipped with a vertical wind turbine according to claim 1, characterized in that: The working assembly (8) comprises a vertical fan (81) for generating electricity through wind power, wherein the vertical fan (81) is fixedly connected to one end of the top of the tower body (2), the other end of the top of the tower body (2) is fixedly connected to a mounting frame (82), the outer side of the mounting frame (82) is fixedly connected to a photovoltaic panel (83), and the outer wall of the tower body (2) is fixedly connected to a plurality of cameras (84) and a sensor (85) for collecting data.

Citation Information

Patent Citations

  • Signal tower

    CN205100636U

Cited By

  • Communication iron tower

    CN121611337A