Safety protection system of aerial work platform and control method of safety protection system

Abstract

The invention provides an aerial work platform safety protection system and a control method thereof.The aerial work platform safety protection system comprises a platform protection device, a bottom vehicle protection device, a platform controller and a main controller, the platform protection device comprises a platform radar, and the bottom vehicle protection device comprises a bottom vehicle radar, an outline marker spotlight and a radar control box; the outline marker spotlight and the bottom vehicle radar are installed on the periphery of the bottom vehicle frame. The method comprises the steps that S1, working area detection and warning are conducted, specifically, a corresponding radar detects a corresponding area, and an outline marker spotlight conducts red light illumination and warning on the road surface around a bottom vehicle; s2, obstacle judgment: when the radar detects that an obstacle exists in the protection area in the protection area, the obstacle is transmitted to the main controller; and S3, stopping warning: executing a stopping working mode according to a judgment result. The corresponding radars are arranged on the platform and the bottom vehicle respectively, and are matched with the area outline marker, so that obstacle recognition in a set range is realized, a corresponding working mode is executed, and the operation safety is guaranteed.

Description

Technical Field

[0001] The invention relates to a safety protection system for an aerial work platform and a control method thereof, belonging to the field of aerial work devices. Background Art

[0002] There are three main methods for existing scissor-type aerial work platforms to monitor the surrounding environment during operation projects: manual observation, mechanical height limit and laser height limit. During manual observation, observation and operation need to be carried out at the same time, and the implementation is easily interfered by obstacles. Mechanical height limit requires the installation of mounting rods, which can easily damage the mechanical height limit device when passing through narrow working conditions. Laser height limit is greatly affected by ambient light and dust and cannot detect transparent objects such as glass.

[0003] Since scissor-type aerial work platforms are mainly used for aerial work, most manufacturers only provide height limit protection and ignore the detection of the vehicle environment. When working at high altitude, the operator is at a high position and cannot observe the ground conditions well. If working in a basement or on a cloudy day with poor light, the surrounding personnel will have poor recognition of the equipment, which may lead to accidents. In addition, many aerial work conditions require working close to the wall, and the current limited motion mode cannot meet most conditions. Summary of the invention

[0004] Purpose of the invention: In view of the deficiencies in the prior art, the present invention provides a safety protection system for an aerial work platform and a control method thereof, which realizes obstacle recognition within a set range by arranging corresponding radars on the platform and the vehicle respectively, and cooperates with the area outline, and executes the corresponding working mode to ensure the safety of the operation.

[0005] Technical solution: A safety protection system for an aerial work platform, comprising a platform protection device, a bottom vehicle protection device, a platform controller and a main controller, wherein the platform protection device and the platform controller are installed on the working platform, and the bottom vehicle protection device and the main controller are installed on the bottom vehicle; The platform protection device includes a platform radar fixedly mounted on the guardrail via a mounting bracket, and the platform radar is electrically connected to the main controller; The undercarriage protection device includes an undercarriage radar, a clearance spotlight and a radar control box. The undercarriage radar is electrically connected to the radar control box. The clearance spotlight and the radar control box are electrically connected to a main controller via a relay. The clearance spotlight and the undercarriage radar are installed around the undercarriage frame. The radar control box is electrically connected to the main controller. The platform controller is electrically connected to the main controller.

[0006] The present invention is provided with radars on both the platform and the undercarriage, and the radars transmit radar signals and receive returned signals to judge whether there are obstacles in the set area that affect the normal lifting and driving work. When working at night or in other places with poor lighting, when obstacles on the road are difficult to see clearly, the outline of the set detection area can be indicated by the outline lights composed of a plurality of spotlight elements around the vehicle frame, and the detection distance of the radar is set accordingly. The combination of the two can realize the safety of the undercarriage operation when working under limited light source conditions. At the same time, an upward detection radar is also provided on the lifting platform. During the platform lifting operation, when an obstacle is detected in the radar detection area, the main controller can judge and enter the corresponding working mode to ensure the safety of the operation.

[0007] The mounting bracket includes a "J"-shaped fixing frame fixedly connected to the upper end of the guardrail by bolts and a mounting cross frame arranged in the middle of the fixing frame. The platform radar is installed in the middle position of the mounting cross frame. A through hole is opened at the upper end of the fixing frame corresponding to the position of the platform radar probe, and a clean space is arranged between the mounting cross frame and the upper end of the fixing frame.

[0008] In order to stably install the platform radar on the platform, a fixed frame that is raised upward in the shape of a "J" is used to protect the platform radar. In order to avoid unnecessary damage such as bumps caused by direct installation on the fixed frame and reduce the failure rate of the platform radar, a mounting cross frame is set and a through hole is opened at the corresponding position of the fixed frame to facilitate the signal transmission and reception of the platform radar. The clean space is convenient for cleaning work during the maintenance stage.

[0009] Side guard plates are provided on the upper edges of the left and right sides of the bottom vehicle frame and extend outward from the frame, and a ladder is installed on the rear side of the frame; A stepped through hole is provided in the middle of the front side of the frame, and the undercarriage radar is embedded in the stepped through hole; The undercar radars located on the left and right sides are installed under the side guard plates of the frame and close to the two ends of the frame; The undercar radar located at the rear side is installed in the middle of the rear frame, and the radar signal emission direction passes through the unobstructed space between the escalator pedals to detect the obstacle position.

[0010] Make full use of the undercarriage frame structure to arrange the undercarriage radar, reduce the modifications caused by installing the undercarriage radar, reduce the design and construction costs, use the side guard plates and escalator structure to reduce the installation of special protective plates, reduce installation time and cost, and use the existing structure to ensure the safety of the undercarriage radar, reduce the probability of collision, and do not affect the detection work of the undercarriage radar.

[0011] The clearance spotlight is arranged at the middle position of the sides around the bottom vehicle frame, and a protective cover is arranged above the clearance spotlight, and the protective cover is fixedly connected to the frame.

[0012] The height of the marker spotlight can be installed according to the installation requirements. At the same time, the marker spotlight can be positioned at an angle after adjusting the angle by loosening or tightening the bolts or swinging up and down with the clamping mechanism. This allows marker spotlights of different heights to indicate the same marker area. It is also possible to achieve area markers of different ranges by adjusting the spotlight angle, and to expand or reduce the detection area by adjusting the detection range of the radar.

[0013] It also includes an audible and visual alarm and a buzzer, both of which are electrically connected to the main controller, the audible and visual alarm is installed at the edge of the bottom vehicle frame, and the buzzer is integrated in the platform controller; An audible and visual alarm and a buzzer are provided, which can emit an audible and visual alarm or a combination of the two in the corresponding working conditions to remind the operator of the working conditions of the current vehicle during operation and give the operator corresponding operation reminders. After the vehicle is separated from or cleared of obstacles, the audible and visual alarm and the buzzer are automatically turned off; It also includes an anti-smashing bracket, the two ends of which are fixed on both sides of the sound and light alarm and the upper end of which is located just above the sound and light alarm.

[0014] An anti-smashing bracket is installed above the sound and light alarm to prevent falling objects from damaging the components. Protective measures are added to all components as much as possible to reduce the failure rate.

[0015] A control method for a safety protection system of an aerial work platform comprises the following steps: S1: Work area detection and warning: When the vehicle is in working state, the working area environment is detected by radar, the platform radar detects the working area above the working platform, the undercarriage radar detects the undercarriage road surface and the surrounding working environment, and the marker spotlights illuminate the road surface around the undercarriage with red light and warn; S2: Obstacle judgment: When the radar detects an obstacle in the protection area, the platform radar directly transmits it to the main controller, and the vehicle radar transmits it to the main controller through the radar control box; S3: Limited movement warning: According to the obstacle judgment result of S2, the platform radar and the bottom vehicle radar detection area are both set with a first-level protection area and a second-level protection area. The limited movement working mode is executed according to the current obstacle distance, which are a low-speed working mode and a prohibited working mode.

[0016] The detection area of ​​the platform radar is divided into a primary protection area and a secondary protection area. The primary protection area is set to have a detection distance of 1.5~2m, and the secondary protection area is set to have a distance of less than 1.5m; When an obstacle is detected in the first-level protection area, the platform radar transmits the position information to the main controller through the CAN bus. The main controller switches the lifting action to a low-speed working mode, and the platform slowly rises or falls at 15% to 20% of the current maximum lifting speed of the vehicle platform. When an obstacle is detected in the secondary protection area, the platform radar transmits the location information to the main controller, and the main controller switches to the prohibited working mode, restricting all actions of the vehicle except descending.

[0017] The undercarriage radar detection area is divided into a primary protection area and a secondary protection area. The primary protection area is set to have a detection distance of 0.4 to 1.5 m, and the secondary protection area is set to have a distance of less than 0.4 m. When an obstacle is detected in the first-level protection area, the vehicle radar transmits the location information to the main controller through the CAN bus. The main controller switches the walking action to the low-speed working mode, and the vehicle travels at a safe speed. The vehicle moves slowly at 15% to 20% of the current maximum speed of the vehicle; the sound and light alarm flashes red and the voice reminds to stay away; When an obstacle is detected in the secondary protection area, the vehicle radar transmits the position information to the main controller via the CAN bus. The main controller switches to the prohibited working mode, the sound and light alarm flashes red and sounds a long warning, and the vehicle is restricted from all actions except descending.

[0018] It also includes the platform emergency working mode. When it is in the prohibited working mode, switch to the upper control, press and hold the platform controller lifting button for 10 seconds, the platform controller buzzer sounds, the main controller switches to the emergency working mode, keep pressing the platform controller lifting button and use the platform controller handle to lift at the same time, the platform rises or falls slowly at 15%~20% of the current vehicle platform's maximum lifting speed. If the platform controller handle button is released, it will return to the original prohibited working mode.

[0019] It also includes the emergency working mode of the undercarriage. When it is in the prohibited working mode, switch to the upper control, press and hold the travel button of the platform controller for 10 seconds, the platform controller buzzer sounds, the main controller switches to the emergency working mode, keep pressing the travel button of the platform controller and use the platform controller handle to make walking movements, the whole vehicle moves slowly at 15%~20% of the current maximum vehicle speed. If the platform controller handle button is released, it will return to the original prohibited working mode.

[0020] Beneficial effect: The present invention is provided with radars on both the platform and the undercarriage, and the radar transmits radar signals and receives returned signals to determine whether there are obstacles in the set area that affect the normal lifting and driving work. When working at night or in other places with poor lighting, when road obstacles are difficult to see clearly, the outline of the set detection area can be indicated by the outline lights composed of multiple spotlight elements around the vehicle frame, and the detection distance of the radar is set accordingly. The combination of the two can achieve the safety of the undercarriage operation when working under limited light conditions. At the same time, an upward detection radar is also provided on the lifting platform. During the platform lifting operation, when an obstacle is detected in the radar detection area, the main controller can judge and enter the corresponding working mode to ensure the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 It is a perspective view of the overall installation structure of the present invention.

[0023] Figure 2 This is a perspective view of the installation structure of the undercarriage protection device of the present invention.

[0024] Figure 3 This is a perspective view of the installation structure of the platform protection device of the present invention.

[0025] Figure 4 This is a diagram of the installation structure of the platform radar of the present invention.

[0026] Figure 5 This is a perspective view of the installation structure of the outline spotlight and the undercarriage radar of the present invention.

[0027] Figure 6 This is a control flow chart of the present invention.

[0028] Figure 7 This is a schematic diagram of the control circuit of the present invention.

[0029] Figure 8 This is a schematic diagram of the classification of platform protection areas of the present invention.

[0030] Fig. 9 This is a schematic diagram of the classification of the undercarriage protection area of ​​the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in 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.

[0032] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] like Figures 1 to 5 As shown, a safety protection system for an aerial work platform comprises a platform protection device 1, a bottom vehicle protection device 2, a platform controller 3 and a main controller 4, wherein the platform protection device 1 and the platform controller 3 are mounted on the working platform, and the bottom vehicle protection device 2 and the main controller 4 are mounted on the bottom vehicle; The platform protection device 1 includes a platform radar 12 fixedly mounted on the guardrail via a mounting bracket 11, and the platform radar 12 is electrically connected to the main controller 4; The undercarriage protection device 2 includes an undercarriage radar 21, a clearance spotlight 22 and a radar control box 23. The undercarriage radar 21 is electrically connected to the radar control box 23. The clearance spotlight 22 and the radar control box 23 are electrically connected to the main controller 4 through a relay. The clearance spotlight 22 and the undercarriage radar 21 are installed around the undercarriage frame. The radar control box 23 is electrically connected to the main controller 4. The platform controller 3 is electrically connected to the main controller 4.

[0035] In the present invention, radars are provided on both the platform and the chassis. The radars emit radar signals and then receive the returned signals to determine whether there are obstacles in the set area that affect the normal lifting and driving operations. When working at night or in other places with poor lighting where it is difficult to see road obstacles clearly, the outline lights 22 arranged around the chassis frame can indicate the outline of the set detection area around the vehicle through a plurality of light-emitting elements that make up the outline lights 22. By corresponding to the detection distance of the radar, the combination of the two can achieve the safety of the chassis operation when working under limited light source conditions. At the same time, a radar for upward detection is also provided on the lifting platform. During the process of the platform lifting operation, when an obstacle is detected in the radar detection area, it can enter the corresponding working mode through the judgment of the main controller 4 to ensure the safety of the operation.

[0036] The mounting bracket 11 includes a "C"-shaped fixing bracket 111 fixedly connected to the upper end of the guardrail by bolts and a mounting cross-frame 112 arranged in the middle of the fixing bracket 111. The platform radar 12 is installed at the middle position of the mounting cross-frame 112. A through-hole is opened at the position corresponding to the probe of the platform radar 12 at the upper end of the fixing bracket 111. A cleaning space is provided between the upper end of the mounting cross-frame 112 and the fixing bracket 111.

[0037] In order to stably install the platform radar 12 on the platform, the "C"-shaped fixing bracket 111 that bulges upward plays a protective role for the platform radar 12. In order to avoid unnecessary damage such as bumps that are likely to occur when directly installed on the fixing bracket 111 and reduce the failure rate of the platform radar 12, the mounting cross-frame 112 is provided. At the same time, through-holes are opened at the corresponding positions of the fixing bracket 111 to facilitate the signal transmission and reception of the platform radar 12, and the cleaning space is convenient for cleaning work during the maintenance stage.

[0038] Side guards 5 are provided on the upper edges of the left and right sides of the chassis frame and extend outward from the chassis frame. A ladder 6 is installed at the rear side of the chassis frame; A stepped through-hole is opened at the middle position of the front side of the chassis frame, and the chassis radar 21 is embedded in the stepped through-hole; The chassis radars 21 located on the left and right sides are distributed and installed at positions close to both ends of the chassis frame below the side guards 5 of the chassis frame; The chassis radar 21 located at the rear side is installed at the middle position of the rear chassis frame, and the radar signal emission direction passes through the unobstructed space between the pedals of the ladder 6 to detect the position of obstacles.

[0039] The undercarriage frame structure is fully utilized to arrange the undercarriage radar 21, which reduces the modifications caused by installing the undercarriage radar 21 and reduces the design and construction costs. The side guard plates 5 and the escalator 6 structure can reduce the installation of special protective plates, reduce installation time and costs, and at the same time, the existing structure can also ensure the safety of the undercarriage radar 21, reduce the probability of collision, and does not affect the detection work of the undercarriage radar 21.

[0040] The position marker spotlight 22 is arranged at the middle position of the sides of the bottom vehicle frame. A protective cover 24 is arranged above the position marker spotlight 22, and the protective cover 24 is fixedly connected to the frame.

[0041] The height of the marker spotlight 22 can be installed according to the installation requirements. At the same time, the marker spotlight 22 can be positioned at an angle after adjusting the angle by loosening or tightening the bolts or swinging up and down in conjunction with the clamping mechanism. The marker spotlights 22 of different heights can indicate the same marker area, and different ranges of area markers can be achieved by adjusting the spotlight angle, and the detection area can be expanded or reduced by adjusting the detection range of the radar.

[0042] It also includes an audible and visual alarm 25 and a buzzer, both of which are electrically connected to the main controller 4, the audible and visual alarm 25 is installed at the edge of the bottom vehicle frame, and the buzzer is integrated in the platform controller 3; It also includes an anti-smashing bracket 26 whose two ends are fixed on both sides of the sound and light alarm 25 and whose upper end is located just above the sound and light alarm 25 .

[0043] An audible and visual alarm 25 and a buzzer are provided, which can emit either audible or visual alarm or a combination of both alarms under corresponding working conditions, reminding the operator of the working conditions of the current vehicle during operation and giving the operator corresponding operation reminders. After escaping or clearing the obstacle, the audible and visual alarm 25 and the buzzer are automatically turned off.

[0044] like Figures 6 to 9 As shown, a control method for a safety protection system of an aerial work platform comprises the following steps: S1: Working area detection and warning: When the vehicle is in working state, the working area environment is detected by radar, the platform radar 12 detects the working area above the working platform, the undercarriage radar 21 detects the undercarriage road surface and the surrounding working environment, and the marker spotlight 22 illuminates the road surface around the undercarriage with red light and warns; S2: Obstacle judgment: When the radar detects an obstacle in the protection area, the platform radar 12 directly transmits it to the main controller 4, and the vehicle radar 21 transmits it to the main controller 4 through the radar control box 23; S3: Limited movement warning: According to the obstacle judgment result of S2, the detection areas of the platform radar 12 and the bottom vehicle radar 21 are both set with a first-level protection area and a second-level protection area, and the limited movement working mode is executed according to the current obstacle distance, which are a low-speed working mode and a prohibited working mode respectively.

[0045] The detection area of ​​the platform radar 12 is divided into a primary protection area and a secondary protection area. The primary protection area is set to have a detection distance of 1.5 to 2 m, and the secondary protection area is set to have a distance of less than 1.5 m. When an obstacle is detected to be in the primary protection area, the platform radar 12 transmits the position information to the main controller 4 via the CAN bus, and the main controller 4 switches the lifting action to a low-speed working mode, and the platform slowly rises or falls at 20% of the current maximum lifting speed of the vehicle platform; When it is detected that the obstacle is in the secondary protection area, the platform radar 12 transmits the position information to the main controller 4, and the main controller 4 switches to the prohibited working mode, and all actions of the vehicle are restricted except descending.

[0046] The detection area of ​​the undercarriage radar 21 is divided into a primary protection area and a secondary protection area. The primary protection area is set with a detection distance of 0.4-1.5m, and the secondary protection area is set with a distance of less than 0.4m; When an obstacle is detected in the primary protection area, the vehicle radar 21 transmits the position information to the main controller 4 through the CAN bus, and the main controller 4 switches the walking action to a low-speed working mode, and the vehicle travels at a safe speed, and the vehicle moves slowly at 20% of the current maximum speed of the vehicle; the sound and light alarm 25 flashes red and voice reminds to stay away; When it is detected that the obstacle is in the secondary protection area, the vehicle radar 21 transmits the position information to the main controller 4 through the CAN bus, the main controller 4 switches to the prohibited working mode, the sound and light alarm 25 flashes red and sounds a long warning, and the vehicle is restricted from all actions except descending.

[0047] It also includes the platform emergency working mode. When it is in the prohibited working mode, switch to the upper control, press and hold the lifting button of the platform controller 3 for 10 seconds, the buzzer of the platform controller 3 sounds long, the main controller 4 switches to the emergency working mode, keep pressing the lifting button of the platform controller and use the handle of the platform controller 3 to lift at the same time, the platform slowly rises or falls at 20% of the current maximum lifting speed of the vehicle platform. If the handle button of the platform controller 3 is released, it will return to the original prohibited working mode.

[0048] It also includes an emergency working mode for the undercarriage. When it is in the prohibited working mode, switch the upper control, press and hold the travel button of the platform controller 3 for 10 seconds, the buzzer of the platform controller 3 sounds long, and the main controller 4 switches to the emergency working mode. Keep pressing the travel button of the platform controller and use the handle of the platform controller 3 to make walking movements. The whole vehicle moves slowly at 20% of the current maximum vehicle speed. If the handle button of the platform controller 3 is released, it will return to the original prohibited working mode.

[0049] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A safety protection system for an aerial work platform, characterized in that: The invention comprises a platform protection device (1), a bottom vehicle protection device (2), a platform controller (3) and a main controller (4), wherein the platform protection device (1) and the platform controller (3) are installed on the working platform, and the bottom vehicle protection device (2) and the main controller (4) are installed on the bottom vehicle; The platform protection device (1) comprises a platform radar (12) mounted on a guardrail, wherein the platform radar (12) is electrically connected to a main controller (4); The undercarriage protection device (2) comprises an undercarriage radar (21), a clearance spotlight (22) and a radar control box (23); the undercarriage radar (21) is electrically connected to the radar control box (23); the clearance spotlight (22) and the radar control box (23) are electrically connected to a main controller (4) via a relay; the clearance spotlight (22) and the undercarriage radar (21) are mounted around the undercarriage frame; the radar control box (23) is electrically connected to the main controller (4); and the platform controller (3) is electrically connected to the main controller (4).

2. The safety protection system for aerial work platforms according to claim 1, characterized in that: The platform radar (12) is fixed to the platform guardrail via a mounting bracket (11); the mounting bracket (11) comprises a "J"-shaped fixing frame (111) fixedly connected to the upper end of the guardrail via bolts, and a mounting cross frame (112) arranged in the middle of the fixing frame (111); the platform radar (12) is installed in the middle of the mounting cross frame (112); a through hole is provided at the upper end of the fixing frame (111) at a position corresponding to the position of a probe of the platform radar (12); and a clean space is provided between the mounting cross frame (112) and the upper end of the fixing frame (111).

3. The safety protection system for aerial work platforms according to claim 1, characterized in that: Side guard plates (5) are provided on the upper edges of the left and right sides of the undercarriage frame and extend toward the outside of the frame, and a ladder (6) is installed on the rear side of the frame; A stepped through hole is provided in the middle of the front side of the vehicle frame, and the undercarriage radar (21) is embedded in the stepped through hole; The undercarriage radars (21) located on the left and right sides are installed below the frame side guard plates (5) and close to the two ends of the frame; The undercar radar (21) located at the rear side is installed at the middle of the rear vehicle frame, and the radar signal emission direction passes through the unobstructed space between the escalator (6) pedals to detect the position of obstacles.

4. The safety protection system for aerial work platforms according to claim 1, characterized in that: The clearance spotlight (22) is arranged at the middle position of the sides of the bottom vehicle frame, and a protective cover (24) is arranged above the clearance spotlight (22), and the protective cover (24) is fixedly connected to the frame.

5. The safety protection system for aerial work platforms according to claim 1, characterized in that: It also includes an audible and visual alarm (25) and a buzzer, wherein the audible and visual alarm (25) and the buzzer are both electrically connected to the main controller (4), the audible and visual alarm (25) is installed at the edge of the bottom vehicle frame, and the buzzer is integrated in the platform controller (3); An audible and visual alarm and a buzzer are provided, which can emit an audible and visual alarm or a combination of the two in the corresponding working conditions to remind the operator of the working conditions of the current vehicle during operation and give the operator corresponding operation reminders. After the vehicle is separated from or cleared of obstacles, the audible and visual alarm and the buzzer are automatically turned off; It also includes an anti-smashing bracket (26) whose two ends are fixed to both sides of the sound and light alarm (25) and whose upper end is located directly above the sound and light alarm (25).

6. A control method for a safety protection system of an aerial work platform according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Working area detection and warning: When the vehicle is in working state, the working area environment is detected by radar, the platform radar (12) detects the working area above the working platform, the vehicle radar (21) detects the road surface under the vehicle and the surrounding working environment, and the clearance spotlight (22) illuminates the road surface around the vehicle with red light and warns; S2: Obstacle judgment: When the radar detects the presence of an obstacle in the protection area, the platform radar (12) directly transmits the information to the main controller (4), and the vehicle radar (21) transmits the information to the main controller (4) via the radar control box (23); S3: Limited movement warning: According to the obstacle judgment result of S2, the detection areas of the platform radar (12) and the vehicle bottom radar (21) are both provided with a first-level protection area and a second-level protection area, and a limited movement working mode is executed according to the current obstacle distance, which are a low-speed working mode and a prohibited working mode.

7. The control method of the safety protection system of the aerial work platform according to claim 6, characterized in that: The detection area of ​​the platform radar (12) is divided into a primary protection area and a secondary protection area, the primary protection area is set with a detection distance of 1.5-2 m, and the secondary protection area is set with a distance of less than 1.5 m; When an obstacle is detected to be in the primary protection area, the platform radar (12) transmits the position information to the main controller (4) via the CAN bus, and the main controller (4) switches the lifting action to a low-speed working mode, and the platform slowly rises or falls at 15% to 20% of the current maximum lifting speed of the vehicle platform; When it is detected that an obstacle is in the secondary protection area, the platform radar (12) transmits the position information to the main controller (4), and the main controller (4) switches to a prohibited working mode, restricting all actions of the vehicle except descending.

8. The control method of the safety protection system of the aerial work platform according to claim 7, characterized in that: The detection area of ​​the vehicle radar (21) is divided into a primary protection area and a secondary protection area. The detection distance of the primary protection area is set to 0.4~1.5m, and the distance of the secondary protection area is set to less than 0.4m; When an obstacle is detected to be in the primary protection area, the vehicle radar (21) transmits the position information to the main controller (4) via the CAN bus, and the main controller (4) switches the walking action to a low-speed working mode, and the whole vehicle travels at a safe speed, and the whole vehicle travels slowly at 15% to 20% of the current maximum speed of the vehicle; the sound and light alarm (25) flashes red and a voice reminds to stay away; When it is detected that an obstacle is in the secondary protection area, the vehicle radar (21) transmits the position information to the main controller (4) via the CAN bus, the main controller (4) switches to a prohibited working mode, the sound and light alarm (25) flashes red and sounds a long warning, and the vehicle is restricted from all actions except descending.

9. The control method of the safety protection system of the aerial work platform according to claim 8, characterized in that: It also includes a platform emergency working mode. When in the prohibited working mode, switch to the upper control, press and hold the lifting button of the platform controller (3) for 10 seconds, the buzzer of the platform controller (3) will sound continuously, and the main controller (4) will switch to the emergency working mode. Keep pressing the lifting button of the platform controller and use the handle of the platform controller (3) to lift the platform. The platform will slowly rise or fall at 15% to 20% of the current maximum lifting speed of the vehicle platform. If the button of the handle of the platform controller (3) is released, it will return to the original prohibited working mode.

10. The control method of the safety protection system of the aerial work platform according to claim 9, characterized in that: It also includes an emergency working mode for the vehicle under the vehicle. When in the prohibited working mode, the upper control is switched, and the travel button of the platform controller (3) is pressed and held for 10 seconds. The buzzer of the platform controller (3) sounds continuously, and the main controller (4) switches to the emergency working mode. The travel button of the platform controller is pressed and held while the handle of the platform controller (3) is used to make a walking motion. The vehicle moves slowly at 15% to 20% of the current maximum driving speed of the vehicle. If the button of the handle of the platform controller (3) is released, the vehicle returns to the original prohibited working mode.

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