Steel reinforcement cage main reinforcement bending phase orientation device and orientation method

Abstract

The invention discloses a steel reinforcement cage main reinforcement bending phase orientation device and orientation method, and relates to the technical field of steel reinforcement cage machining equipment.The steel reinforcement cage main reinforcement bending phase orientation device comprises a rack, a rotating mechanism, a detection mechanism and a control system; the axial position adjusting mechanism is arranged on the rack and used for adjusting the axial position of the main reinforcement; the rotating mechanism is arranged on the rack and used for enabling the main reinforcements to coaxially rotate; the detection mechanism is arranged on the rack and used for detecting and recording the distance between the bent section of the main reinforcement and the detection mechanism; the control system is electrically connected with the rotating mechanism and the detection mechanism and used for controlling the rotating mechanism according to the distance data recorded by the detection mechanism so that the bent section of the main rib can rotate to the preset phase. The problem that the phase position is uncertain when the main reinforcement bending section is welded can be solved.

Description

Technical Field

[0001] This invention relates to the field of steel cage processing equipment technology, specifically to a steel cage main reinforcement bending phase orientation device and orientation method. Background Technology

[0002] Reinforcing cages, as the foundation framework of cast-in-place piles, are widely used in pile foundation engineering for large-scale infrastructure projects such as bridges, high-rise buildings, and high-speed railways. With the improvement of the level of industrialization in construction, the processing method of reinforcing cages has gradually shifted from traditional manual binding to fully automatic rolling welding machines. Fully automatic reinforcing cage rolling welding machines can significantly improve processing efficiency and welding quality, and reduce the labor intensity of workers.

[0003] In the fabrication process of reinforcing cages, to enhance the pull-out resistance of the pile foundation and the connection strength with the pile cap, the main reinforcement bars (longitudinal reinforcement bars) usually need to be pre-bent to form two parts: the main body and the bent section. The main body and the bent section are parallel but not collinear, and the connection between the two parts is smoothly transitioned. During the welding process, after the main reinforcement bars have been cut to length and bent, the spatial phase of the bent section is often random before it is transported to the welding station (e.g., the bent section bulges upward, downward, or laterally relative to the main body). In automated welding, if the phase of the bent section is not uniform, it can lead to problems such as interference with other equipment / reinforcing bars, failure of the automatic welding machine to perform normal welding, and overall twisting and deformation of the reinforcing cage.

[0004] Therefore, this application is hereby submitted. Summary of the Invention

[0005] The purpose of this invention is to provide a phase orientation device for bending the main reinforcement bars of a steel cage, which solves the problem of phase uncertainty during welding of the bent sections of the main reinforcement bars.

[0006] This invention is achieved through the following technical solution: A rebar cage main reinforcement bending phase orientation device includes: an axial position adjustment mechanism for adjusting the axial position of the main reinforcement; a rotation mechanism for coaxially rotating the main reinforcement; a detection mechanism for detecting and recording the distance between the bent segment of the main reinforcement and the detection mechanism; and a control system electrically connected to the rotation mechanism and the detection mechanism, the control system controlling the rotation mechanism according to the distance data recorded by the detection mechanism to rotate the bent segment of the main reinforcement to a preset phase.

[0007] In another preferred embodiment, the detection mechanism includes a base, abutment, and detector; the abutment is slidably connected to the base so that it can approach or move away from the bent section of the main reinforcement; the base is provided with a driving member that enables the abutment to slide directionally to abut against the bent section of the main reinforcement; the detector is located on the base and is used to detect the distance the abutment slides relative to the base.

[0008] In another preferred embodiment, the abutment is plate-shaped and the sliding direction is parallel to the plate surface of the abutment. The abutment is perpendicular to the main reinforcement so that the edge of the abutment abuts against the side wall of the main reinforcement.

[0009] In another preferred embodiment, the abutment is provided with a pressure sensor, which is electrically connected to the control system of the drive member. When the abutment abuts against the bent section of the main rib, it compresses the pressure sensor. When the pressure sensor is compressed, it transmits a signal to the control system of the drive member to control the drive member to stop.

[0010] In another preferred embodiment, the rotating mechanism is provided with an angle sensor, which is electrically connected to the control system of the driving component. Whenever the rotating mechanism causes the main rib to rotate by a preset angle, the angle sensor transmits a signal to the control system of the driving component to control the driving component to start.

[0011] In another preferred embodiment, the rotating mechanism includes a base, a rotating component, and a clamping assembly; the rotating component is rotatably disposed on the base; the clamping assembly is disposed on the rotating component and is used to clamp the main rib.

[0012] In another preferred embodiment, the clamping assembly includes a pair of jaws and a clamping cylinder; the jaws are slidably disposed on the rotating member so that the two jaws can move closer or further away from each other; the clamping cylinder is disposed on the rotating member and connected to the jaws so that the two jaws can move closer or further away synchronously.

[0013] In another preferred embodiment, the rotating mechanism further includes a lifting pair to enable the clamping assembly to approach and clamp the main rib from bottom to top.

[0014] In another preferred embodiment, a fixing mechanism is further included, which is used to clamp the portion of the main body of the fixed reinforcing bar at the connection with the bent section in a vertical direction.

[0015] A method for orienting the bending phase of main reinforcement bars in a steel cage includes the following steps: Based on the length of the bent section of the main reinforcement bar, the axial position of the main reinforcement bar is adjusted by the axial position adjustment mechanism so that the main body of the main reinforcement bar is aligned with the rotation mechanism while the bent section of the main reinforcement bar is aligned with the detection mechanism. The main rib is rotated 360° coaxially by the rotating mechanism. The distance between the bent section of the main reinforcement and the detection mechanism is measured and recorded multiple times by the detection mechanism. Based on the distance data set recorded by the detection mechanism, the maximum distance data and the maximum angular position of the rotating mechanism corresponding to the maximum distance data are obtained. The control system controls the rotating mechanism to rotate to the desired angle position, which is the maximum angle position minus 180°.

[0016] The present invention, by adopting the above-mentioned technical solution, has the following positive effects compared with the prior art: This invention discloses a rebar cage main reinforcement bending phase orientation device. By setting an axial position adjustment mechanism, the axial position of the main reinforcement is adjusted so that its main body aligns and engages with a rotating mechanism, and its bent section aligns and engages with the rotating mechanism. The rotating mechanism fixes and drives the main reinforcement to rotate coaxially (with the axis of the main body as its axis), thereby indirectly driving the bent section to revolve around the main body. Furthermore, by setting a detection mechanism, the distance between the bent section and the detection mechanism is detected and recorded multiple times during the rotation of the main reinforcement, thus obtaining a distance data set. From this data set, the maximum distance between the bent section and the detection mechanism, and the location of the bent section within the detection mechanism, can be selected. At the maximum distance, the rotating mechanism is at its maximum angular position. Based on this, by setting up a control system, the maximum phase corresponding to the bending segment can be determined according to the distance data set (especially the maximum distance). Thus, according to actual needs, the rotating mechanism is controlled by the control system to rotate the main reinforcement to the required preset phase. Through the cooperation of the above features, the main reinforcement bending phase orientation device can effectively solve the problem of uncertain phase during the welding of the main reinforcement bending segment, so that the bending segment of the main reinforcement is fixed at the required preset phase before welding. This effectively avoids problems that may occur during subsequent welding, such as interference between the main reinforcement and other equipment / reinforcement, failure of the automatic welding machine to weld normally, and overall twisting and deformation of the reinforcement cage. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of a rebar cage main reinforcement bending phase orientation device provided by the present invention; Figure 2A schematic diagram of the rotating mechanism of a rebar cage main bar bending phase orientation device provided by the present invention; Figure 3 A schematic diagram of a detection mechanism for a rebar cage main reinforcement bending phase orientation device provided by the present invention; Figure 4 The flowchart illustrates a detection method for a rebar cage main reinforcement bending phase orientation device provided by the present invention.

[0018] The attached diagram shows the markings and corresponding component names: 10-Frame; 20-Rotating mechanism; 21-Base; 22-Rotating component; 23-Gripper; 24-Clamping cylinder; 30-Detection mechanism; 31-Base; 32-Abutting component; 40-Fixing mechanism. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0020] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "lateral", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] It should be noted that the terms "horizontal" and "vertical" in this invention are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane".

[0022] To better understand the implementation of the main reinforcement bending phase orientation device for steel cages described in this invention, the overall operation flow of the fully automated steel cage welding production line using this device is first explained. This production line mainly consists of a raw material processing area, an automatic feeding area, a main reinforcement orientation and conveying area, and a welding and forming main machine area. The specific process flow is as follows: First, the coiled or fixed-length steel bars are straightened, cut to length, threaded and ground in sections, and pre-bent in sections to produce precast main reinforcement components with bent sections.

[0023] The pre-treated main reinforcement bars are placed on the automatic feeding mechanism by manual labor or hoisting.

[0024] After separation, the individual main reinforcement bars are moved to the length-setting mechanism. At this stage, since the phase of the bending section of the main reinforcement bar is random, in order to prevent collision interference when it enters the welding host later, and to meet the welding process requirements for the phase of the bending section (generally, it is arranged radially inward along the reinforcing cage or tangentially along the reinforcing cage), this phase orientation device is introduced at this stage.

[0025] Through the coordination of the rotating mechanism, detection mechanism and control system in this device, the main rib is rotated to the required preset phase; after orientation is completed, the auxiliary mechanism transports the main rib forward.

[0026] After orientation, the main reinforcing bars are precisely fed into the rotating indexing plate of the welding machine (or a guide tube passing through the fixed plate). Simultaneously, the inner support bars (inner rings) are pre-positioned on the welding station. A welding robot or manual welding operation welds the contact points between the main reinforcing bars and the inner support bars, forming the rigid inner skeleton of the reinforcing cage.

[0027] After the main reinforcement bars are fixed, the main machine drives the main reinforcement cage to rotate, while the winding mechanism pulls the coiled steel bars (stirrups) and spirally winds them around the outer circumference of the main reinforcement cage. The welding mechanism simultaneously welds the intersections of the main reinforcement bars and stirrups, ultimately forming the finished steel cage. Example

[0028] Please refer to Figures 1 to 3 As shown, this embodiment provides a rebar cage main reinforcement bending phase orientation device, including: a frame 10; a second, an axial position adjustment mechanism, which is disposed on the frame 10 and used to adjust the axial position of the main reinforcement; a third, a rotating mechanism 20, which is disposed on the frame 10 and used to make the main reinforcement rotate coaxially; a fourth, a detection mechanism 30, which is disposed on the frame 10 and used to detect and record the distance between the bent section of the main reinforcement and the detection mechanism 30; and a fifth, a control system, which is electrically connected to the rotating mechanism 20 and the detection mechanism 30, and the control system is used to control the rotating mechanism 20 according to the distance data recorded by the detection mechanism 30 so that the bent section of the main reinforcement rotates to a preset phase.

[0029] The rebar cage main reinforcement bending phase orientation device provided in this embodiment provides an installation foundation for several mechanisms by setting up a frame 10; by setting up an axial position adjustment mechanism, the axial position of the main reinforcement is adjusted so that its main body is aligned and cooperates with the rotating mechanism 20, and its bent section is aligned and cooperates with the rotating mechanism 20; by setting up the rotating mechanism 20, the main reinforcement is fixed and rotated with the coaxial axis of the main body, thereby indirectly driving the bent section to revolve around the main body. On this basis, by setting up a detection mechanism 30, the distance between the bent section and the detection mechanism 30 is detected and recorded intensively and repeatedly during the rotation of the main reinforcement, a distance data set can be obtained, and the bent section and the detection mechanism 30 can be filtered out from the distance data set. The maximum distance between mechanisms 30, and the maximum angular position of rotating mechanism 20 when at the maximum distance; based on this, by setting up a control system, the maximum phase corresponding to the bending segment can be determined according to the distance data set, especially the maximum distance, so that according to actual needs, the control system can control rotating mechanism 20 to rotate the main reinforcement to the required preset phase; through the cooperation of the above features, the main reinforcement bending phase orientation device of the steel cage can effectively solve the problem of uncertain phase during welding of the main reinforcement bending segment, so that the bending segment of the main reinforcement is fixed at the required preset phase before welding, thereby effectively avoiding problems such as interference between the main reinforcement and other equipment / reinforcement, failure of automatic welding machine to weld normally, and overall twisting and deformation of the steel cage that may occur during subsequent welding.

[0030] It should be noted that the above-mentioned rotating mechanism can fix the main reinforcement bar and drive it to rotate. The fixing mechanism can be any of the existing technologies, such as clamping mechanism, clamping mechanism, etc., as long as it can fix the main reinforcement bar.

[0031] It should be noted that the aforementioned testing agencies generally use a periodic testing method, such as testing once every specific time period, or once every time the main reinforcement bar rotates a specific angle. Generally speaking, the higher the testing frequency, the higher the data accuracy.

[0032] It should be noted that the above-mentioned axial position adjustment mechanism can be any of the existing technologies, such as pushing and pulling along the axial direction from both ends of the main reinforcement to adjust the axial position of the main reinforcement, or clamping the main reinforcement and moving it along the axial direction to adjust the axial position of the main reinforcement.

[0033] To further explain the specific structure of the detection mechanism 30, the detection mechanism 30 includes a base 31, abutment 32, and detector; the base 31 is fixedly mounted on the frame 10; the abutment 32 is slidably connected to the base 31 so that the abutment 32 can approach or move away from the bent section of the main reinforcement; the base 31 is provided with a driving member, which enables the abutment 32 to slide in a direction to abut against the bent section of the main reinforcement; the detector is located on the base 31 and is used to detect the distance the abutment 32 slides relative to the base 31.

[0034] During testing, the abutment 32 is slid on the base 31 by the driving component until the abutment 32 abuts against the side wall of the bent section of the main rib. At the same time, the sliding distance of the abutment 32 is detected by the detector, and the distance when the bent section is located in that phase (and the corresponding angular position of the rotating mechanism at this time) can be determined.

[0035] It should be noted that the aforementioned driving component can be any type of driving component in the prior art, such as a cylinder, hydraulic cylinder, electric cylinder, lead screw mechanism, etc., as long as it can enable the abutment 32 to slide relative to the base 31.

[0036] In order to minimize the contact area between the abutment 32 and the bent section, so as to avoid the abutment 32 causing deformation of the bent section and thus improve the detection accuracy, the abutment 32 is plate-shaped and the sliding direction is parallel to the plate surface of the abutment 32. The abutment 32 is set perpendicular to the main rib so that the edge of the abutment 32 abuts against the side wall of the main rib.

[0037] To prevent the abutment 32 from continuing to compress the bent section after it comes into contact with the side wall of the bent section, which could cause deformation of the bent section and affect the detection accuracy, the abutment 32 is equipped with a pressure sensor. The pressure sensor is electrically connected to the control system of the drive component. When the abutment 32 comes into contact with the bent section of the main rib, it compresses the pressure sensor. When the pressure sensor is under pressure, it transmits a signal to the control system of the drive component to control the drive component to stop.

[0038] In order to specifically constrain the detection frequency, the rotating mechanism 20 is equipped with an angle sensor. The angle sensor is electrically connected to the control system of the driving component. Whenever the rotating mechanism 20 rotates the main rib by a preset angle, the angle sensor transmits a signal to the control system of the driving component to control the driving component to start.

[0039] With the above settings, whenever the rotating mechanism rotates the main rib by a preset angle (e.g., 5°), the angle sensor will transmit a signal to the control system of the drive component to control the drive component to start, thereby driving the abutment 32 to approach and abut against the side wall of the first bending section.

[0040] To further explain the specific structure of the rotating mechanism 20, the rotating mechanism 20 includes a base 21, a rotating component 22, and a clamping assembly; the base 21 is fixedly disposed on the frame 10; the rotating component 22 is rotatably disposed on the base 21; the clamping assembly is disposed on the rotating component 22, and the clamping assembly is used to clamp the main rib.

[0041] With the above setup, the main body of the main rib is clamped and fixed by the clamping assembly, and then the main rib is driven to rotate coaxially by the rotating component 22.

[0042] It should be noted that the rotation axis of the rotating component 22 is coaxial with the main body of the main rib.

[0043] It should be noted that the rotating component 22 can be any rotating mechanism in the prior art, such as the rotating mechanism of a motor, gear set and turntable, as long as it can make the rotating component 22 rotate.

[0044] To further explain the specific structure of the clamping assembly, the clamping assembly includes a pair of jaws 23 and a clamping cylinder 24; the jaws 23 are slidably disposed on the rotating member 22 so that the two jaws 23 can move closer or further away from each other; the clamping cylinder 24 is disposed on the rotating member 22 and is connected to the jaws 23 so that the two jaws 23 can move closer or further away synchronously.

[0045] Preferably, the gripper 23 slides toward the axis of the rotating member 22.

[0046] In order to enable the clamping assembly to detach smoothly from the main rib, the rotating mechanism 20 also includes a lifting pair. The base 21 is connected to the frame 10 through the lifting pair, so that the clamping assembly can approach and clamp the main rib from bottom to top.

[0047] With the above settings, when the main reinforcement is not clamped by the clamping component, the clamping component is located below the main reinforcement, which will not cause structural obstruction to the main reinforcement and will not prevent it from being sent to the steel cage for welding.

[0048] The aforementioned main reinforcement bending phase orientation device for steel cages also includes a fixing mechanism 40, which is located on the frame 10 and is used to clamp and fix the main body of the main reinforcement and the part connecting the bending section in the vertical direction.

[0049] In this embodiment, the fixing mechanism 40 includes two clamping plates. The clamping plates are horizontally arranged. The top surface of the lower clamping plate is flush with the bottom surface of the main reinforcement. The upper clamping plate can be raised and lowered to clamp the bent section of the main reinforcement between the two clamping plates. Since the main body and the bent section of the main reinforcement are located on two non-collinear straight lines, they are located on the same plane. After being clamped by the two clamping plates, unnecessary rotation will not occur.

[0050] Please refer to Figure 4 This embodiment also provides a method for oriented phase of bending main reinforcement bars in a steel cage, including the following steps: S1. Based on the length of the bent section of the main reinforcement bar, adjust the axial position of the main reinforcement bar through the axial position adjustment mechanism so that the main body of the main reinforcement bar is aligned with the rotation mechanism while the bent section of the main reinforcement bar is aligned with the detection mechanism. S2. The main rib is rotated 360° coaxially around the main body using the rotating mechanism 20. S2.1 The base 21 is raised by the above-mentioned lifting pair until the clamping assembly is aligned with the main rib, and then the clamping cylinder 24 drives the clamping claw 23 to clamp the main body of the main rib. S2.2 The rotating component 22 drives the clamping assembly to rotate, thereby causing the main rib to rotate 360° coaxially around the main body as the axis; S3. The distance between the bent section of the main reinforcement and the detection mechanism 30 is detected and recorded multiple times by the detection mechanism 30. In this embodiment, the rotating mechanism 20 drives the main reinforcement to rotate 5°, and the detection mechanism 30 detects and records the distance between the bent section of the main reinforcement and the detection mechanism 30 once. S3.1 The rotation angle of the rotating mechanism 20 is detected by the angle sensor. Every 5° rotation, the angle sensor transmits a signal to the control system of the drive component to start the drive component, thereby driving the abutment 32 to slide towards the bending section of the main rib until the abutment 32 abuts against the side wall of the bending section. At this time, the pressure sensor is pressed and transmits a signal to the control system of the drive component to stop the drive component, thus completing one detection. S4. Based on the distance data set recorded by the detection mechanism 30, obtain the maximum distance data and the maximum angular position of the rotating mechanism 20 corresponding to the maximum distance data; S4.1 If the maximum distance data is not found, an alarm pop-up will prompt manual handling; S4.2 After manual processing, execute step S2 again; S5. Control the rotating mechanism 20 to rotate to the desired angle position through the control system. The desired angle position is the maximum angle position minus 180°. S6. The main body of the main reinforcement and the part at the connection of the bent section are clamped in the vertical direction by the fixing mechanism 40, and then the rotating mechanism 20 is separated from the main reinforcement.

[0051] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for oriented phase bending of main reinforcing bars in a steel cage, characterized in that, include: An axial position adjustment mechanism is used to adjust the axial position of the main reinforcement bar. Rotating mechanism (20), the rotating mechanism (20) is used to make the main ribs rotate coaxially; The detection mechanism (30) is used to detect and record the distance between the bent section of the main reinforcement and the detection mechanism (30); The control system is electrically connected to the rotating mechanism (20) and the detection mechanism (30). The control system is used to control the rotating mechanism (20) according to the distance data recorded by the detection mechanism (30) so that the bending section of the main rib rotates to a preset phase.

2. The rebar cage main reinforcement bending phase orientation device according to claim 1, characterized in that, The detection mechanism (30) includes a base (31), abutment (32), and detector; The abutment (32) is slidably connected to the base (31) so that the abutment (32) can approach or move away from the bent section of the main reinforcement; The base (31) is provided with a driving member, which enables the abutment (32) to slide in a direction to abut against the bent section of the main reinforcement; The detector is located on the base (31) and is used to detect the distance that the abutment (32) slides relative to the base (31).

3. The rebar cage main reinforcement bending phase orientation device according to claim 2, characterized in that, The abutment (32) is plate-shaped and the sliding direction is parallel to the plate surface of the abutment (32). The abutment (32) is set perpendicular to the main reinforcement so that the edge of the abutment (32) abuts against the side wall of the main reinforcement.

4. The rebar cage main reinforcement bending phase orientation device according to claim 3, characterized in that, The abutment (32) is equipped with a pressure sensor, which is electrically connected to the control system of the drive component. When the abutment (32) abuts against the bent section of the main rib, it squeezes the pressure sensor. When the pressure sensor is compressed, it transmits a signal to the control system of the drive component to control the drive component to stop.

5. The rebar cage main reinforcement bending phase orientation device according to claim 4, characterized in that, The rotating mechanism (20) is equipped with an angle sensor, which is electrically connected to the control system of the driving component. Whenever the rotating mechanism (20) rotates the main rib by a preset angle, the angle sensor transmits a signal to the control system of the driving component to control the driving component to start.

6. The rebar cage main reinforcement bending phase orientation device according to claim 1, characterized in that, The rotating mechanism (20) includes a base (21), a rotating component (22), and a clamping assembly; The rotating component (22) is rotatably disposed on the base (21); The clamping assembly is located on the rotating part (22) and is used to clamp the main rib.

7. The rebar cage main reinforcement bending phase orientation device according to claim 6, characterized in that, The clamping assembly includes a pair of jaws (23) and a clamping cylinder (24); The gripper (23) is slidably disposed on the rotating member (22) so that the two grippers (23) can move closer or further apart from each other; The clamping cylinder (24) is located on the rotating member (22), and the clamping cylinder (24) is connected to the gripper (23) so that the two grippers (23) can move closer or further away synchronously.

8. The rebar cage main reinforcement bending phase orientation device according to claim 7, characterized in that, The rotating mechanism (20) also includes a lifting pair to enable the clamping assembly to approach and clamp the main rib from bottom to top.

9. The rebar cage main reinforcement bending phase orientation device according to claim 1, characterized in that, It also includes a fixing mechanism (40) for clamping and fixing the main body of the main reinforcement and the part at the connection of the bent section in the vertical direction.

10. A method for orienting the bending phase of the main reinforcement bars in a steel cage, characterized in that, Includes the following steps: Based on the length of the bent section of the main reinforcement bar, the axial position of the main reinforcement bar is adjusted by the axial position adjustment mechanism so that the main body of the main reinforcement bar is aligned with the rotation mechanism while the bent section of the main reinforcement bar is aligned with the detection mechanism. The main rib is rotated 360° coaxially by the rotating mechanism (20); The distance between the bent section of the main reinforcement and the detection mechanism (30) is detected and recorded multiple times by the detection mechanism (30); Based on the distance data set recorded by the detection mechanism (30), the maximum distance data and the maximum angular position of the rotating mechanism (20) corresponding to the maximum distance data are obtained; The control system controls the rotating mechanism (20) to rotate to the desired angle position, which is the maximum angle position minus 180°.

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