A north star positioning detection device for a luffing mechanism of a portal crane

Abstract

The utility model relates to a portal jib crane amplitude-variable mechanism Beidou positioning detection device, include: main machine, main antenna and from antenna, main antenna and from antenna are connected through a root feeder main machine respectively, main antenna and from antenna are installed in the both sides of mounting support respectively, mounting support is installed on the protective fence of portal jib crane through the connecting support, the protective fence is set up horizontally, the protective fence and mounting support are fixed in the multiple adjustable hole positions on connecting support. The utility model has the beneficial effects that the high-precision positioning directional function of Beidou positioning main machine is utilized, in combination with the setting of double antenna of main antenna and from antenna, the positioning data of gate machine amplitude-variable mechanism can be accurately obtained, and the accuracy and reliability of positioning data are ensured, through the adjustable hole position design on the connecting support, the position and angle of main antenna and from antenna can be conveniently adjusted, and it is ensured that they are fixed in the same plane, same height.

Description

Technical Field

[0001] This utility model relates to the field of port mechanism positioning, and in particular to a Beidou positioning detection device for the luffing mechanism of a gantry crane. Background Technology

[0002] During gantry crane operations, precise positioning of the on-site luffing mechanism is crucial for ensuring the safety of personnel, equipment, and operations. Therefore, a differential positioning system needs to be installed on the gantry crane. This system supports major global positioning satellite channels such as BeiDou, operates across all frequency bands, and enhances satellite search capabilities to provide sufficient satellite data for high-precision positioning. The design and orientation of the BeiDou positioning monitoring device are closely related to the BeiDou antenna support. For the BeiDou antenna, we are particularly concerned with its vertical field of view. The accuracy of BeiDou positioning can usually only be verified after the antenna is installed. Adjusting the support angle at this point is extremely difficult, involving on-site pyrotechnic operations, and repositioning still presents construction challenges. Currently, the industry uses adjustable equipment supports to address these design and construction difficulties. However, these supports have some or all of the following drawbacks: 1. Large size and complex structure; 2. Insufficient stability; 3. Poor corrosion resistance.

[0003] Traditional testing of gantry crane luffing mechanism positioning data involves calculating values ​​using gears driving an encoder. However, due to prolonged operation, slippage can occur between the gears, leading to inaccurate measurements over time. Furthermore, this structure is complex. The luffing mechanism's BeiDou positioning host is equipped with dual antennas. The gantry crane's amplitude positioning data is determined by acquiring data from both antennas and taking their center position. Therefore, as long as the two antennas are located on the same plane and at the same height, the accuracy and reliability of the positioning data can be guaranteed regardless of the gantry crane's amplitude position. Thus, an adjustable mounting structure is urgently needed to meet the positional requirements of the dual antennas, thereby ensuring the accuracy and reliability of the positioning data. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a Beidou positioning detection device for the luffing mechanism of a gantry crane, which aims to solve at least one of the above-mentioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A Beidou positioning detection device for the luffing mechanism of a gantry crane includes: a main unit, a main antenna, and a slave antenna. The main antenna and the slave antenna are respectively connected to the main unit through a feed line. The main antenna and the slave antenna are respectively installed on both sides of a mounting bracket. The mounting bracket is installed on the guardrail of the gantry crane through a connecting bracket. The guardrail is arranged horizontally. The guardrail and the mounting bracket are fixed in multiple adjustable holes on the connecting bracket.

[0006] The beneficial effects of this utility model are as follows: This solution proposes a Beidou positioning and detection device for the luffing mechanism of a gantry crane, which solves the problems of complex structure, poor stability, and poor corrosion resistance of existing Beidou antenna mounting brackets in the industry; by utilizing the high-precision positioning and orientation function of the Beidou positioning host, combined with the dual antenna setup of the main antenna and the slave antenna, the positioning data of the gantry crane luffing mechanism can be accurately obtained, ensuring the accuracy and reliability of the positioning data; through the adjustable hole design on the connecting bracket, the position and angle of the main antenna and the slave antenna can be easily adjusted to ensure that they are fixed on the same plane and at the same height, thereby ensuring the stability of the positioning.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the mounting bracket includes a vertical bracket and a horizontal bracket, with a vertical bracket vertically mounted on each side of the horizontal bracket, and the end of the vertical bracket facing away from the horizontal bracket is used to connect the main antenna or the slave antenna.

[0009] The beneficial effects of adopting the above-mentioned further solution are: using round steel to make the horizontal support and round tube to make the vertical support gives the horizontal and vertical supports good strength and rigidity, which can resist the vibration and impact brought by the external environment and ensure the stable installation of the antenna; at the same time, the structure of round steel and round tube allows the mounting bracket to bear the weight of the antenna and feeder and other accessories, ensuring the stability and safety of the entire positioning system.

[0010] Furthermore, the two vertical supports connecting the main antenna and the slave antenna are arranged in the same plane.

[0011] The beneficial effects of adopting the above-mentioned further solution are as follows: Since the two vertical supports are coplanar, it can be ensured that the main antenna and the slave antenna are on the same plane. Therefore, during installation, only the installation position of the entire mounting bracket and the connecting bracket needs to be adjusted. The main antenna and the slave antenna are installed as a whole, which avoids the problem of inaccurate antenna positioning caused by the angular deviation of the two vertical supports and ensures positioning accuracy.

[0012] Furthermore, the top of the vertical bracket is provided with fasteners for mounting the main antenna or the slave antenna.

[0013] The beneficial effect of adopting the above-mentioned further solution is that by connecting the device to the Beidou antenna with pre-welded bolts, the number of moving parts is reduced, and the possibility of the equipment becoming loose is decreased.

[0014] Furthermore, multiple connecting brackets are evenly installed on the guardrail, and the connecting brackets are arranged vertically.

[0015] The beneficial effects of adopting the above-mentioned further solution are: by uniformly and vertically setting the connecting brackets, the stability of the overall structure formed by the mounting brackets being connected to the guardrail through the connecting brackets is significantly enhanced, and it can effectively resist external impacts and vibrations; carbon steel material has excellent durability and corrosion resistance, and with the protection of anti-rust paint, the service life of the connecting brackets is greatly extended.

[0016] Furthermore, the guardrail is connected to the connecting bracket via a first U-shaped connector.

[0017] The beneficial effects of adopting the above-mentioned further solution are: the setting of the first U-shaped connector can realize the connection between the guardrail with a circular outer wall and the connecting bracket to form a stable structural system. At the same time, the multiple adjustable holes on the connecting bracket allow for adjustment according to the relative position of the connecting bracket and the guardrail during connection. Even if there is a height deviation on the guardrail, the installation position of the connecting bracket can be flexibly adjusted, improving the versatility and convenience of installation.

[0018] Furthermore, the adjustable hole position consists of multiple oblong holes formed on the connecting bracket. The multiple oblong holes are arranged side by side along the length direction of the connecting bracket, and the length direction of the oblong holes is parallel to the length direction of the connecting bracket. The guardrail is fixed in the oblong holes of the connecting bracket by the first U-shaped connector.

[0019] The advantages of adopting the above-mentioned further solution are as follows: Since the length of the oblong hole allows for a certain degree of adjustment, the guardrail can be used as a positioning base. A suitable oblong hole can be selected for fixing the connecting bracket, making the installation process more flexible and adaptable to installation needs under different scenarios and conditions. Simultaneously, the oblong hole design allows the connecting bracket to adapt to guardrails of different sizes and shapes, improving the versatility and adaptability of the installation, and simplifying the installation method. By selecting a suitable oblong hole and fixing it with the first U-shaped connector, the installation position and angle of the connecting bracket relative to the guardrail can be precisely adjusted, ensuring that after installing the dual antennas, the two antennas are located on the same plane and at the same height, guaranteeing the stability of the positioning.

[0020] Furthermore, the transverse support is fixed to the oval hole on the connecting support by a second U-shaped connector.

[0021] The beneficial effects of adopting the above-mentioned further solution are as follows: the cooperation between the second U-shaped connector and the oval hole on the connecting bracket makes the horizontal bracket more stable, reduces the shaking or displacement of the bracket due to force during use, thereby enhancing the stability of the entire structure and making the connection convenient and quick; by selecting appropriate oval holes and second U-shaped connectors for fixing, the installation position and angle of the horizontal bracket relative to the connecting bracket can be precisely adjusted to ensure that after the dual antennas are installed, the dual antennas are located on the same plane and at the same height, ensuring the stability of the positioning.

[0022] Furthermore, the first U-shaped connector and the second U-shaped connector are located on the same side or different sides of the connecting bracket, respectively.

[0023] The beneficial effect of adopting the above-mentioned further solution is that when the first U-shaped connector and the second U-shaped connector are located on different sides of the connecting bracket, the distributed layout makes it easier to balance and distribute the load, making the structure more stable.

[0024] Furthermore, an alarm device and a control system are also provided. The host is communicatively connected to the control system, and the control system is electrically connected to the alarm device. The host outputs an alarm signal to the control system, and the control system is used to control the alarm device to sound an alarm.

[0025] The beneficial effect of adopting the above-mentioned further scheme is that by comparing the angle values ​​given by the encoder of the amplitude-changing mechanism with the main antenna and the slave antenna, when the angle difference between the two is greater than 5°, the control system controls the alarm device (such as a buzzer) to issue an alarm signal, providing reliable protection for personal safety, equipment safety and operational safety on site. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0027] Figure 2 This is a side view of a portion of the structure in one embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the mounting bracket in one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the connecting bracket in one embodiment of the present invention.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Main unit; 2. Main antenna; 3. Slave antenna; 4. Feeder cable; 5. Mounting bracket; 6. Connecting bracket; 7. Guardrail; 8. First U-shaped connector; 9. Second U-shaped connector; 51. Vertical bracket; 52. Horizontal bracket; 61. Oval hole. Detailed Implementation

[0032] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0033] like Figure 1 As shown, this utility model provides a Beidou positioning detection device for the luffing mechanism of a gantry crane, including: a main unit 1, a main antenna 2, and a slave antenna 3. The main antenna 2 and the slave antenna 3 are each connected to the main unit 1 via a feeder 4. Alternatively, a frame structure consisting of multiple columns and connecting plates can be used to fix the main unit 1 and the dual antennas onto corresponding supports. In this embodiment, the main unit 1 is a Beidou positioning main unit 1, and the main antenna 2 and the slave antenna 3 are also Beidou positioning main antennas 2 and 3. The Beidou positioning main unit 1 has high-precision positioning and orientation functions, and features serial interfaces, Ethernet interfaces, and 4G data interfaces. The entire device has strong shock resistance, salt spray resistance, and water immersion resistance, making it suitable for various application scenarios. It supports differential positioning services such as Ntrip (Networked Transport of RTCM via Internet Protocol), supports high-precision services provided by third parties, and also supports self-built base station mode. The antenna unit (i.e., main antenna 2 and slave antenna 3) features high gain, wide beam pattern, strong anti-interference capability, and stable phase center to ensure centimeter-level positioning accuracy. It also tracks full-band signals from four GNSS (Global Navigation Satellite System) systems, including the BeiDou-3 global signal, to achieve RTK (Real-time kinematic) positioning and dual-antenna orientation calculation.

[0034] like Figure 1As shown, the Beidou positioning host 1 of the amplitude-changing mechanism is equipped with dual antennas. The main antenna 2 and the slave antenna 3 are respectively installed on both sides of the mounting bracket 5 along its length. By acquiring the amplitude positioning data of the gantry crane from the location of the dual antenna data center, the accuracy and reliability of the positioning data can be determined. In this embodiment, the mounting bracket 5 is installed on the guardrail 7 of the gantry crane via a connecting bracket 6. The guardrail 7 is horizontally arranged, and both the guardrail 7 and the mounting bracket 5 are fixed on multiple adjustable holes in the connecting bracket 6. Therefore, with the position of the guardrail 7 of the gantry crane fixed, dual adjustment can be achieved by adjusting the mounting holes of the connecting bracket 6 relative to the guardrail 7 and the mounting holes of the mounting bracket 5 relative to the connecting bracket 6, ensuring that the main antenna 2 and the slave antenna 3 are fixed on the same plane and at the same height, thus ensuring the stability of the positioning. In this embodiment, to maximize the corrosion resistance of the adjustment device, all bolts used for installation on the detection device are made of SS304 or SS316L material, which will not be repeated below.

[0035] This solution proposes a Beidou positioning and detection device for the luffing mechanism of a gantry crane, which solves the problems of complex structure, poor stability, and poor corrosion resistance of existing Beidou antenna mounting brackets 5 in the industry. Utilizing the high-precision positioning and orientation function of the Beidou positioning host 1, combined with the dual antenna setup of the main antenna 2 and the slave antenna 3, the positioning data of the gantry crane luffing mechanism can be accurately obtained, ensuring the accuracy and reliability of the positioning data. Through the adjustable hole design on the connecting bracket 6, the position and angle of the main antenna 2 and the slave antenna 3 can be easily adjusted to ensure that they are fixed on the same plane and at the same height, thereby guaranteeing the stability of the positioning.

[0036] like Figure 1-3 As shown, in a preferred embodiment, the mounting bracket 5 includes a vertical bracket 51 and a horizontal bracket 52. A vertical bracket 51 is vertically mounted on each side of the horizontal bracket 52. In this embodiment, the horizontal bracket 52 is made of round steel, and the vertical bracket 51 is made of round tubes. The mounting bracket 5 is constructed by horizontally connecting two vertical round tubes with round steel and welding them together. The material of the pre-welded bracket can be stainless steel or carbon steel. One end of one vertical bracket 51 facing away from the horizontal bracket 52 is connected to the main antenna 2, and the other end of the other vertical bracket 51 facing away from the horizontal bracket 52 is connected to the secondary antenna 3.

[0037] In the above scheme, the horizontal support 52 is made of round steel and the vertical support 51 is made of round tube, so that the horizontal support 52 and the vertical support 51 have good strength and rigidity, which can resist the vibration and impact brought by the external environment and ensure the stable installation of the antenna. At the same time, the structure of round steel and round tube allows the mounting bracket 5 to bear the weight of the antenna and accessories such as feeder 4, ensuring the stability and safety of the entire positioning system.

[0038] like Figure 1-2As shown, the two vertical supports 51 connecting the main antenna 2 and the secondary antenna 3 are arranged in a coplanar manner, that is, the mounting bracket 5 formed by the two vertical supports 51 and one horizontal support 52 is U-shaped. The simple U-shaped mounting bracket 5 connects to the steel structure of the operating machinery (i.e., the guardrail 7), is lightweight, simple in structure, stable and reliable, fully considering structural strength, reasonable yet aesthetically pleasing, reliable while being lightweight. Because the two vertical supports 51 are coplanar, it ensures that the main antenna 2 and the secondary antenna 3 are on the same plane. Therefore, during installation, only the installation position of the entire mounting bracket 5 and the connecting bracket 6 needs to be adjusted. The main antenna 2 and the secondary antenna 3 are installed as a whole, avoiding the problem of inaccurate antenna positioning caused by angular deviations between the two vertical supports 51, thus ensuring positioning accuracy.

[0039] To enable the installation of the main antenna 2 and the slave antenna 3, fasteners for installing the main antenna 2 or the slave antenna 3 are provided at the top of each vertical bracket 51. The fasteners can be connecting bolts, with the heads of the connecting bolts welded upside down to the top of the vertical bracket 51. The bolts are connected to the Beidou antenna by pre-welding, which reduces the number of moving parts and lowers the possibility of equipment loosening.

[0040] In a preferred embodiment, multiple connecting brackets 6 are evenly installed on the guardrail 7. Each connecting bracket 6 is vertically positioned, meaning it is perpendicular to the guardrail 7. The spacing between the connecting brackets 6 is adjusted according to the dimensions of the guardrail 7 and the mounting brackets 5. Figure 1 As shown, in this embodiment, a total of 5 sets of connecting brackets 6 are provided. In order to facilitate on-site construction and installation, carbon steel is preferred for the brackets, and they are coated with high-quality anti-rust paint.

[0041] In the above scheme, the stability of the overall structure formed by the uniform and vertically arranged connecting brackets 6 and the mounting brackets 5 connected to the guardrail 7 is significantly enhanced, which can effectively resist external impact and vibration. The connection brackets 6 make it convenient to install and maintain the equipment. The carbon steel material has excellent durability and corrosion resistance, and with the protection of anti-rust paint, the service life of the connecting brackets 6 is greatly extended.

[0042] In this embodiment, the guardrail 7 is connected to the connecting bracket 6 via a first U-shaped connector 8. Specifically, the first U-shaped connector 8 can be a U-bolt made of carbon steel or stainless steel, with a spring washer to prevent loosening. The U-bolt is directly fixed to multiple adjustable holes on the connecting bracket 6. It is conceivable that the first U-shaped connector 8 can also be a connecting frame in the shape of "U" that serves to fix the guardrail 7, etc., but no further limitations are made here.

[0043] In the above scheme, the first U-shaped connector 8 plays an adjustment and fixing role. The first U-shaped connector 8 enables the connection between the protective railing 7 with a circular outer wall and the connecting bracket 6 to form a stable structural system. At the same time, the multiple adjustable holes on the connecting bracket 6 allow for adjustment according to the relative position of the connecting bracket 6 and the protective railing 7 during connection. Even if there is a height deviation on the protective railing 7, the installation position of the connecting bracket 6 can be flexibly adjusted, improving the versatility and convenience of installation.

[0044] like Figure 1 , Figure 4 As shown, in this embodiment, the adjustable hole is an oblong hole 61 opened on the connecting bracket 6. Multiple oblong holes 61 are arranged side by side along the length of the connecting bracket 6, and the length of the oblong holes 61 is parallel to the length of the connecting bracket 6. The guardrail 7 is directly fixedly installed on the oblong hole 61 of the connecting bracket 6 through the first U-shaped connector 8.

[0045] In the above scheme, since the length of the oblong hole 61 allows for a certain degree of adjustment, the guardrail 7 can be used as the positioning base. A suitable oblong hole 61 can be selected for fixing the connecting bracket 6, making the installation process more flexible and adaptable to different scenarios and conditions. Simultaneously, the design of the oblong hole 61 allows the connecting bracket 6 to adapt to guardrails 7 of different sizes and shapes, improving the versatility and adaptability of the installation, and simplifying the installation method. By selecting a suitable oblong hole 61 and fixing it with the first U-shaped connector 8, the installation position and angle of the connecting bracket 6 relative to the guardrail 7 can be precisely adjusted, ensuring that after installing the dual antennas, the dual antennas are located on the same plane and at the same height, guaranteeing the stability of the positioning.

[0046] Correspondingly, the horizontal support 52 is fixed in the oblong hole 61 of the connecting support 6 by the second U-shaped connector 9. The second U-shaped connector 9 can also be a U-bolt, made of carbon steel or stainless steel, with a spring washer to prevent loosening. The U-bolt is directly fixed in the multiple oblong holes 61 opened on the connecting support 6. It can be imagined that the second U-shaped connector 9 can also be a connecting frame body with a "U" shape that serves to fix the guardrail 7, etc., but no further limitations are made here.

[0047] The aforementioned first U-shaped connector 8 and second U-shaped connector 9 possess high overall strength, and their simple components facilitate easy molding and quick installation, making them suitable for large-scale application. The cooperation between the second U-shaped connector 9 and the oblong hole 61 on the connecting bracket 6 ensures a more stable fixation of the transverse bracket 52, reducing swaying or displacement caused by stress during use, thereby enhancing the overall structural stability and facilitating quick and easy connection. By selecting appropriate oblong holes 61 and second U-shaped connectors for fixation, the installation position and angle of the transverse bracket 52 relative to the connecting bracket 6 can be precisely adjusted, ensuring that after installing the dual antennas, the two antennas are located on the same plane and at the same height, guaranteeing positioning stability.

[0048] In some feasible embodiments, the first U-shaped connector 8 and the second U-shaped connector 9 are located on the same side or different sides of the connecting bracket 6, and the first U-shaped connector 8 is located above the second U-shaped connector 9.

[0049] like Figure 2 As shown, in this embodiment, the first U-shaped connector 8 and the second U-shaped connector 9 are located on different sides of the connecting bracket 6. The dispersed layout makes it easier to balance and distribute the load, making the structure more stable.

[0050] In the preferred embodiment, the detection device is also equipped with an alarm device. Additionally, a separate or external control system can be installed. The Beidou host 1 is communicatively connected to the control system, and the control system is electrically connected to the buzzer. The control system is a PLC control system. The alarm device can be, but is not limited to, a buzzer, which is not shown in the diagram. When the gantry crane's luffing mechanism operates, if the angle between the main antenna 2 and the slave antenna 3 is greater than 5° compared to the angle value given by the encoder of the luffing mechanism, the Beidou host 1 outputs an alarm signal to the PLC control system. The PLC control system then outputs an alarm signal to the buzzer on the control panel in the central control room, thus triggering an alarm. During this process, the main antenna 2 and the slave antenna 3 send signals to the Beidou host 1, enabling the positioning of the main antenna 2 and the slave antenna 3. The host 1 receives the actual height values ​​of the main antenna 2 and the slave antenna 3. The method of using a buzzer to trigger an alarm in the control system is existing technology. Those skilled in the art can easily conceive of programming the control system to achieve the corresponding effect and thus realize the aforementioned automatic control operation, which will not be elaborated further here.

[0051] By comparing the angle values ​​given by the encoder of the amplitude-changing mechanism with the main antenna 2 and the slave antenna 3, when the angle difference between the two is greater than 5°, the control system controls the alarm device (such as a buzzer) to issue an alarm signal, providing reliable protection for personal safety, equipment safety and operational safety on site.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A Beidou positioning detection device for the luffing mechanism of a gantry crane, comprising: The host (1), main antenna (2) and slave antenna (3) are respectively connected to the host (1) via a feed line (4). The main antenna (2) and the slave antenna (3) are respectively installed on both sides of the mounting bracket (5). The mounting bracket (5) is installed on the guardrail (7) of the gantry crane via a connecting bracket (6). The guardrail (7) is arranged horizontally. The guardrail (7) and the mounting bracket (5) are fixed in multiple adjustable holes on the connecting bracket (6).

2. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 1, characterized in that, The mounting bracket (5) includes a vertical bracket (51) and a horizontal bracket (52). A vertical bracket (51) is vertically mounted on each side of the horizontal bracket (52). The end of the vertical bracket (51) facing away from the horizontal bracket (52) is used to connect the main antenna (2) or the slave antenna (3).

3. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 2, characterized in that, The two vertical supports (51) connecting the main antenna (2) and the slave antenna (3) are arranged in the same plane.

4. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 2 or 3, characterized in that, The top of the vertical bracket (51) is provided with fasteners for mounting the main antenna (2) or the slave antenna (3).

5. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 2, characterized in that, Multiple connecting brackets (6) are evenly installed on the guardrail (7), and the connecting brackets (6) are arranged vertically.

6. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 5, characterized in that, The guardrail (7) is connected to the connecting bracket (6) via the first U-shaped connector (8).

7. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 6, characterized in that, The adjustable holes are multiple oval holes (61) opened on the connecting bracket (6). The multiple oval holes (61) are arranged side by side along the length direction of the connecting bracket (6). The length direction of the oval holes (61) is parallel to the length direction of the connecting bracket (6). The guardrail (7) is fixed in the oval holes (61) of the connecting bracket (6) by the first U-shaped connector (8).

8. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 7, characterized in that, The transverse support (52) is fixed to the oval hole (61) on the connecting support (6) by the second U-shaped connector (9).

9. The Beidou positioning detection device for the luffing mechanism of a gantry crane according to claim 8, characterized in that, The first U-shaped connector (8) and the second U-shaped connector (9) are located on the same side or different sides of the connecting bracket (6).

10. A Beidou positioning detection device for a gantry crane luffing mechanism according to any one of claims 1-3 and 5-9, characterized in that, An alarm device and a control system are also provided. The host (1) is communicatively connected to the control system, and the control system is electrically connected to the alarm device. The host (1) outputs an alarm signal to the control system, and the control system is used to control the alarm device to sound an alarm.

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