Crane suspension arm near-electricity detection device and detection method thereof

Abstract

The invention provides a crane jib near-electricity detection device and method, and the device comprises a near-electricity detection mechanism which can be installed on a jib, a router which forms a local area network, and a wireless audible and visual alarm which is connected with the near-electricity detection mechanism. The near-electricity detection mechanism comprises a mounting assembly which can be adsorbed and fixed on the surface of the suspension arm, a dual-mode host, a single-mode host and an audible and visual alarm which are arranged on the mounting assembly, and wifi antennas arranged on the dual-mode host, the single-mode host and the audible and visual alarm, the dual-mode host is arranged at the end part of the suspension arm through the mounting assembly, and the single-mode host is arranged at the end part of the suspension arm through the wifi antennas. The dual-mode host is provided with a near electric induction antenna and a millimeter wave radar. The single-mode host is arranged on the side face of the middle of the suspension arm through an installation assembly, and a near-electricity induction antenna is arranged on the single-mode host. The distance between the crane suspension arm and the high-voltage line can be conveniently detected, and safety accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of near-electricity detection, and in particular to a crane boom near-electricity detection device and a detection method thereof. Background Art

[0002] In recent years, with the investment in infrastructure improvement, the number of construction sites has continued to increase, and the number of aerial work equipment has gradually increased. Aerial construction machinery has been close to high-voltage live equipment, causing frequent line short-circuit tripping accidents. To reduce such tripping accidents caused by aerial construction machinery, a high-voltage on-site construction safety distance alarm is needed. It is installed on the top of the construction machinery and at the same height as the line to remind the operator when the construction equipment is close to the live wire. An effective and reliable near-electricity detection method is the core of the near-electricity alarm device. The near-electricity detection methods currently used in engineering applications are usually based on a single detection signal such as image recognition, laser ranging or electromagnetic induction. If the location of the near-electricity accident is different, the near-electricity characteristics are also different. Similarly, if the operation scene of the engineering vehicle and the voltage of the near-electricity line are different, the near-electricity characteristics are also different. The traditional recognition method based on a single near-electricity feature is difficult to work in a variety of accident situations.

[0003] With the development and improvement of the power grid structure, the power grid has become the main carrier for optimizing resource allocation, and the construction of power lines has made great progress. Due to the particular geographical location and environmental conditions of power line construction, the construction site environment is complex, and there may be multiple energized high-voltage lines of different voltage levels around. During the construction process, cranes are commonly used construction machinery. In order to ensure the safe operation of cranes and avoid the crane booms from touching high-voltage lines, resulting in safety accidents, it is necessary to pay attention to the distance between the crane boom and the high-voltage lines. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a crane boom proximity detection device and a detection method thereof, which are convenient for detecting the distance between the crane boom and the high-voltage line and avoiding safety accidents.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a crane boom proximity electricity detection device and a detection method thereof, comprising a proximity electricity detection mechanism that can be installed on the boom, a router that constitutes a local area network, and a wireless sound and light alarm connected to the proximity electricity detection mechanism, the proximity electricity detection mechanism comprising a mounting assembly that can be adsorbed and fixed on the surface of the boom, a dual-mode host, a single-mode host and a sound and light alarm arranged on the mounting assembly, and a wifi antenna arranged on the dual-mode host, the single-mode host and the sound and light alarm, the dual-mode host is arranged at the end of the boom through the mounting assembly, and the dual-mode host is provided with a proximity electricity sensing antenna and a millimeter wave radar; the single-mode host is arranged on the side of the middle part of the boom through the mounting assembly, and the single-mode host is provided with a proximity electricity sensing antenna.

[0006] Preferably, the bottom end surface of the mounting base is provided with four telescopic grooves in a circumferential array, and the mounting assembly includes an adsorption block disposed in the telescopic groove, and a first electromagnet fixedly disposed on the adsorption block.

[0007] Preferably, the installation assembly also includes four sliding rods vertically fixed on the bottom walls of four different telescopic slots, a second electromagnet fixed on the bottom wall of the telescopic slot, and a suction cup fixed in an auxiliary groove opened in the middle position of the bottom end surface of the installation base. The adsorption block is movably inserted into a sliding groove on one end surface of the telescopic slot, and the adsorption block is movably mounted on the sliding rod body through the sliding groove.

[0008] Preferably, an adsorption groove is provided at the bottom end of the suction cup, and a pressure relief hole communicating with the adsorption groove is provided at the top end of the suction cup, and the installation assembly also includes a control block arranged in the installation base and located at the opening position of the pressure relief hole at the top end of the suction cup, a sealing block arranged at the opening positions of the two connecting holes, and a control member arranged on the control block and controlling the sealing block to move to the connecting hole opening or away from the connecting hole opening; a through hole communicating with the inside of the pressure relief hole is provided at the side surface of the bottom side of the control block, and connecting holes communicating with the through hole are provided at the left and right symmetrical sides of the control block.

[0009] Preferably, the control member includes a control screw rod arranged parallel to the length direction of the control block and above the top side surface of the control block, a moving rod whose length direction is perpendicular to the direction of the control screw rod body and the middle part is threadedly connected to the control screw rod body, and an elastic structure arranged on both ends of the moving rod and respectively connected to different sealing blocks, and the elastic structure controls the two sealing blocks to approach each other.

[0010] Preferably, the elastic structure includes fixed blocks fixedly arranged on both sides of the bottom end of the moving rod, a telescopic rod arranged along the length direction of the moving rod and having two ends fixedly connected to the adjacent end faces of the fixed block and the sealing block, and a limit spring movably sleeved on the body of the telescopic rod and having two ends connected to the adjacent end faces of the fixed block and the sealing block, and when the end face of the sealing block is attached to the side face of the control block, the limit spring is in a compressed state.

[0011] Preferably, the method comprises the following steps:

[0012] Step 1: Install the dual-mode host, single-mode host and sound and light alarm at the end of the boom moving end, the middle of the boom, the crane cab and the command center through the installation components. The near-inductive antenna and millimeter-wave radar on the dual-mode host and single-mode host detect the detection distance between the boom and the high-voltage line.

[0013] Step 2: Set up a router at the construction site to form a local area network for data transmission;

[0014] Step 3: Obtain the detection data collected by the dual-mode host and the single-mode host, and transmit it to the mobile terminal via a WiFi connection;

[0015] Step 4: Set the warning distance between the boom and the high-voltage line through the software app on the mobile terminal;

[0016] Step 5: Obtain the detection data collected in step 3, and compare the detection data with the warning distance. When the detection distance collected by the detection data is less than or equal to the warning distance, send a signal to the sound and light alarm to control the sound and light alarm to emit a sound and light alarm.

[0017] The beneficial effects of the present invention are as follows: before construction on the construction site, the dual-mode host and the single-mode host are respectively installed at the end of the boom and the middle of the crane. The near-inductive antenna and millimeter-wave radar arranged on the dual-mode host judge the distance between the boom and the high-voltage line by sensing the magnetic field strength generated by the high-voltage line. The millimeter-wave radar calculates the distance between the high-voltage line and the boom using electromagnetic waves in the millimeter-wave frequency band, thereby realizing dual monitoring of near-inductive induction and millimeter-wave radar. The single-mode host arranged in the middle of the boom detects the blind spot of the dual-mode host, thereby improving the comprehensiveness of the distance detection between the boom and the high-voltage line when the boom is working, facilitating the detection of the distance between the crane boom and the high-voltage line, and controlling the sound and light alarm to sound an alarm when the detected distance is less than the safe distance, thereby avoiding the boom and the high-voltage line from touching and causing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 The present invention provides a simplified structural schematic diagram of a crane boom proximity detection device and a detection method thereof.

[0020] Figure 2 This is a schematic diagram of the structure of a crane boom near-electricity detection device and a detection method thereof proposed in the present invention, viewed from above.

[0021] Figure 3 It is a schematic diagram of the installation component structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the control member and the elastic member of the present invention.

[0023] Figure 5 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0024] In the figure: 1. Installation base; 2. Dual-mode host; 3. Single-mode host; 4. Sound and light alarm; 5. WiFi antenna; 6. Telescopic slot; 7. Adsorption block; 8. First electromagnetic magnet; 9. Auxiliary slot; 10. Suction cup; 11. Slide slot; 12. Slide rod; 13. Pressure relief hole; 14. Control block; 15. Control screw rod; 16. Moving rod; 17. Connection hole; 18. Control motor; 19. Sealing block; 20. Telescopic rod; 21. Limit spring. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0026] See also Figure 1-5 A crane boom proximity detection device and a detection method thereof, comprising a proximity detection mechanism that can be installed on the boom, a router that constitutes a local area network, and a wireless sound and light alarm 4 connected to the proximity detection mechanism, the proximity detection mechanism comprising a mounting assembly that can be adsorbed and fixed on the surface of the boom, a dual-mode host 2, a single-mode host 3 and the sound and light alarm 4 arranged on the mounting assembly, and a wifi antenna arranged on the dual-mode host 2, the single-mode host 3 and the sound and light alarm 4, the dual-mode host 2 is arranged at the end of the boom through the mounting assembly, and the dual-mode host 2 is provided with a proximity induction antenna and a millimeter wave radar; the single-mode host 3 is arranged on the side of the middle part of the boom through the mounting assembly, and the single-mode host 3 is provided with a proximity induction antenna.

[0027] like Figure 1-4 As shown, firstly, the router is turned on to form a local area network for data transmission, and then the dual-mode host 2 is installed on the end of the boom through the installation component. The distance between the high-voltage wires around the boom and the boom is detected by the near-electric induction antenna and millimeter-wave radar arranged on the dual-mode host 2. Then, the single-mode host 3 is installed in the middle of the boom through the installation component, so that the distance between the middle of the boom and the high-voltage wire can be detected by the near-electric induction antenna arranged on the single-mode host 3. This facilitates the detection of the distance between the boom and the high-voltage wire, ensures that when the crane boom is working, it is easy to detect the distance between the boom and the high-voltage wire, avoids the situation where the driver controls the boom to touch the high-voltage wire, reduces safety hazards, and avoids safety accidents.

[0028] In recent years, with the development and improvement of the power grid structure, the power grid has become the main carrier for optimizing resource allocation, and the construction of power lines has made great progress. Due to the particular geographical location and environmental conditions of power line construction, the construction site environment is complex, and there may be multiple live high-voltage lines of different voltage levels around.

[0029] During the construction process, cranes are commonly used construction machinery. In order to ensure the safe operation of cranes and prevent the crane booms from hitting high-voltage lines and obstacles, which may cause safety accidents, we have started to develop a laser radar-based warning device for nearby live lines since 2021. So far, we have developed two monitoring devices, including:

[0030] The first generation consists of six directional laser radars that emit six parallel directional light beams. The device is lifted to high altitudes via a lifting rod, forming a virtual protective net under nearby live power lines.

[0031] The second generation is a 360° high-speed scanning laser radar, plus a stable gimbal. The radar's laser rotation angle, amplitude, and speed are set for cyclic scanning to form a safe working surface. When the scan detects foreign objects invading the safe working perimeter threshold, an alarm is triggered.

[0032] However, both generations of monitoring devices developed have problems, as follows:

[0033] The first generation of monitoring devices were relatively bulky. When the equipment was lifted to a high altitude, it would shake due to environmental factors such as wind. As a result, the laser radar would not receive the return light after emitting a light beam, and thus could not form an effective safety protection surface.

[0034] Based on the problems of the first generation, the second generation optimized and upgraded the device. It uses a brushless motor, an adaptive pan / tilt, and a 360° laser scanning radar to ensure that the safety protection surface scanned by the laser radar is always horizontal. However, it was found during the application process that the installation position needs to be installed on the running line tower or the lifting rod, and the installation method is not convenient. The definition of the radar scanning angle is not intuitive, and the laser radar radiation distance is limited, which cannot fully meet all construction site application scenarios.

[0035] Therefore, considering the above, it is urgent to solve the problem that cranes are prone to safety accidents during construction. That is, we can design and develop a monitoring and early warning device for nearby live lines, install it on the crane, monitor the crane boom approaching high-voltage lines and obstacles, and promptly remind the staff and take corresponding measures to avoid casualties and facility damage caused by safety accidents.

[0036] The present application includes a dual-mode host 2 with built-in millimeter-wave radar and proximity sensor, a single-mode host 3 with built-in proximity sensor, two sets of wireless sound and light alarms 4, a set of WiFi transceiver router, a set of development configuration and monitoring APP, an adaptive customized protection box and a mobile terminal. By installing the dual-mode host 2 on the end of the boom and the single-mode motor 3 on the middle of the boom, it is convenient to detect the distance between the end and the middle of the boom and the high-voltage line. When the distance between the boom and the high-voltage line is less than the safe distance, information is sent to the sound and light alarm 4, and an alarm is sounded by the sound and light alarm 4 to remind the driver and the person in charge of the construction site that the boom is too close to the high-voltage line or even that the boom touches the high-voltage line.

[0037] The dual-mode host 2 is installed on the top of the boom, with a built-in near-electric induction device and millimeter-wave radar. The near-electric induction antenna determines the distance between the boom and the high-voltage line by sensing the magnetic field strength generated by the high-voltage line, while the millimeter-wave radar uses the electromagnetic waves in the millimeter-wave frequency band to calculate the distance between the high-voltage line and the boom, realizing dual monitoring of near-electric induction and millimeter-wave radar, and realizing automatic sound and light alarm when the equipment or personnel are less than the safe distance according to the risk control value requirements of the operating personnel or mechanical equipment and the live lines and other live objects.

[0038] Since the crane boom has four sides, the millimeter-wave radar can only radiate to one sector. Considering cost savings, to solve the monitoring blind spot in the middle of the boom, it is only necessary to install a single-mode host 3 in the middle of the boom and monitor the surrounding magnetic field through near-induction.

[0039] If there are multiple AC high-voltage lines or DC and AC power exist at the same time at the construction site, the monitoring voltage level of the early warning device can be set through the software app, and the monitoring thresholds of the millimeter-wave radar and each high-voltage line can be set to achieve real-time monitoring effects.

[0040] When the operating personnel or mechanical equipment are less than the safe distance from the live wires, the on-site construction personnel can be reminded immediately. Sound and light alarms can be installed in multiple places such as the crane cab and the construction site command center. Automatic sound and light alarms will be issued when it is detected that the distance between the high-voltage wires is less than the safe distance.

[0041] The dual-mode host 2 , the single-mode host 3 and the sound and light alarm 4 are all provided with power supplies for power supply, and the dual-mode host 2 , the single-mode host 3 and the sound and light alarm 4 are respectively installed and fixed on the top end surfaces of different installation bases 1 .

[0042] The bottom end surface of the mounting base 1 is provided with four telescopic slots 6 in a circumferential array, and the mounting assembly includes an adsorption block 7 disposed in the telescopic slot 6 and a first electromagnet 8 fixedly disposed on the adsorption block 7 .

[0043] like Figure 1-2As shown, the bottom end of the mounting base 1 is directly placed on the end face or the middle surface of the boom, and the first electromagnet 8 is powered. At this time, the magnetic force generated by the first electromagnet 8 facilitates the adsorption block 7 to be tightly adsorbed and fixed on the boom, so that the dual-mode host 2 and the single-mode host 3 can be conveniently installed on the boom, and the sound and light alarm 4 can be conveniently fixed on the surface of the iron object.

[0044] The installation assembly also includes four slide rods 12 vertically fixed on the bottom walls of four different telescopic slots 6, a second electromagnet fixed on the bottom wall of the telescopic slot 6, and a suction cup 10 fixed in an auxiliary slot 9 provided in the middle of the bottom end surface of the installation base 1. The adsorption block 7 is movably inserted into a slide groove 11 provided on one end surface of the telescopic slot 6, and the adsorption block 7 is movably mounted on the slide rod 12 through the slide groove 11.

[0045] like Figure 2 As shown, when the bottom end face of the mounting base 1 is placed on the iron material on the surface of the boom, by pressing the mounting base 1 and the surface of the iron material, the bottom end face of the suction cup 10 is tightly fitted with the iron material, and the mounting base 1 is pressed close to the distance between the iron material, so that the air in the adsorption groove is discharged, so that a vacuum state is formed between the suction cup 10 and the iron material, and the first electromagnet 8 and the second electromagnet are powered by a power supply, and the magnetic poles of the adjacent ends of the first electromagnet 8 and the second electromagnet are the same, and a repulsive force is formed between the first electromagnet 8 and the second electromagnet, and this At this time, the first electromagnet 8 exerts suction on the iron material, thereby fixing the position of the adsorption block 7 on the iron material and pushing the adsorption block 7 to move away from the telescopic slot 6 through repulsion. At this time, the mounting base 1 has a tendency to move away from the iron material, pulling the suction cup 10 to move away from the iron material, thereby facilitating the increase of the pressure in the space between the adsorption slot and the iron material. After the adsorption block 7 and the iron material are adsorbed and fixed, the adsorption force between the suction cup 10 and the iron material is enhanced again, thereby ensuring the stability of the mounting base 1 installed and fixed on the iron material on the surface of the boom.

[0046] An adsorption groove is provided at the bottom end of the suction cup 10, and a pressure relief hole 13 communicating with the adsorption groove is provided at the top end of the suction cup 10. The installation assembly also includes a control block 14 arranged in the installation base 1 and located at the opening position of the pressure relief hole 13 at the top end of the suction cup 10, a sealing block 19 arranged at the opening positions of the two connecting holes 17, and a control member arranged on the control block 14 and controlling the sealing block 19 to move to the opening of the connecting hole 17 or away from the opening of the connecting hole 17; a through hole communicating with the inside of the pressure relief hole 13 is provided on the bottom side of the control block 14, and connecting holes 17 communicating with the through hole are provided on the left and right symmetrical sides of the control block 14.

[0047] The control component includes a control screw 15 arranged parallel to the length direction of the control block 14 above the top side of the control block 14, a moving rod 16 whose length direction is perpendicular to the rod body of the control screw 15 and the middle part is sleeved on the rod body of the control screw 15 through a threaded connection, and an elastic structure arranged on both ends of the moving rod 16 and respectively connected to different sealing blocks 19, and the elastic structure controls the two sealing blocks 19 to approach each other.

[0048] The elastic structure includes fixed blocks fixedly arranged on both sides of the bottom end of the moving rod 16, a telescopic rod 20 arranged along the length direction of the moving rod 16 and having two ends respectively fixedly connected to the adjacent end faces of the fixed block and the sealing block 19, and a limit spring 21 movably sleeved on the body of the telescopic rod 20 and having two ends respectively connected to the adjacent end faces of the fixed block and the sealing block 19. When the end face of the sealing block 19 is attached to the side face of the control block 14, the limit spring 21 is in a compressed state.

[0049] As shown in 4-5, after the construction is completed, when the dual-mode host 2, the single-mode host 3 and the sound and light alarm 4 need to be disassembled, the control motor 18 is used to drive the control screw 15 to rotate, and the moving rod 16 on the rod body of the control screw 15 is driven to move along the direction of the rod body of the control screw 15. At this time, the sealing block 19 is driven by the elastic member to move away from the opening position of the connecting hole 17, so that air can enter the adsorption tank through the connecting hole 17, the through hole and the pressure relief hole 13, thereby facilitating the pressure relief of the adsorption tank. At this time, it is convenient to remove the mounting base 1 from the iron material when the power is off.

[0050] When the sealing block 19 moves to the opening position of the connecting hole 17, due to the elastic force of the limit spring 21, it is easy to push the sealing block 19 to fit tightly on the opening position of the connecting hole 17, so that the opening position of the connecting hole 17 can be sealed. When it is necessary to relieve the pressure in the adsorption groove opened by the suction cup 10, at this time, the sealing block 19 is controlled to slide away from the opening position of the connecting hole 17, so as to facilitate the pressure relief in the adsorption groove and the disassembly of the mounting base 1.

[0051] The following steps are involved:

[0052] Step 1: Install the dual-mode host 2, the single-mode host 3 and the sound and light alarm 4 at the end of the boom moving end, the middle of the boom, the crane cab and the command center respectively through the installation components, and the near-electric induction antenna and millimeter-wave radar set on the dual-mode host 2 and the single-mode host 3 detect the detection distance between the boom and the high-voltage line;

[0053] Step 2: Set up a router at the construction site to form a local area network for data transmission;

[0054] Step 3: Obtain the detection data collected by the dual-mode host 2 and the single-mode host 3, and transmit them to the mobile terminal via a wifi connection;

[0055] Step 4: Set the warning distance between the boom and the high-voltage line through the software app on the mobile terminal;

[0056] Step 5: Obtain the detection data collected in step 3, and compare the detection data with the warning distance. When the detection distance collected by the detection data is less than or equal to the warning distance, send a signal to the sound and light alarm 4 to control the sound and light alarm 4 to emit a sound and light alarm.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A crane boom proximity detection device, comprising a proximity detection mechanism that can be installed on the boom, a router constituting a local area network, and a wireless sound and light alarm (4) connected to the proximity detection mechanism, characterized in that: The near-electricity detection mechanism comprises a mounting assembly that can be adsorbed and fixed on the surface of a suspension arm, a dual-mode host (2), a single-mode host (3) and an audible and visual alarm (4) arranged on the mounting assembly, and a wifi antenna arranged on the dual-mode host (2), the single-mode host (3) and the audible and visual alarm (4); the dual-mode host (2) is arranged at the end of the suspension arm through the mounting assembly, and the dual-mode host (2) is provided with a near-electricity sensing antenna and a millimeter-wave radar; the single-mode host (3) is arranged on the side of the middle part of the suspension arm through the mounting assembly, and the single-mode host (3) is provided with a near-electricity sensing antenna.

2. A crane boom proximity detection device according to claim 1, characterized in that: The bottom end surface of the mounting base (1) is provided with four telescopic grooves (6) in a circumferential array, and the mounting assembly comprises an adsorption block (7) arranged in the telescopic groove (6), and a first electromagnet (8) fixedly arranged on the adsorption block (7).

3. A crane boom proximity detection device according to claim 2, characterized in that: The mounting assembly further comprises four slide bars (12) vertically fixedly arranged on the bottom walls of four different telescopic slots (6), a second electromagnet fixedly arranged on the bottom wall of the telescopic slot (6), and a suction cup (10) fixedly arranged in an auxiliary slot (9) provided in the middle of the bottom end surface of the mounting base (1); the adsorption block (7) is movably arranged in the telescopic slot (6) and has a slide slot (11) provided on one end surface thereof, and the adsorption block (7) is movably sleeved on the rod body of the slide bar (12) through the slide slot (11).

4. A crane boom proximity detection device according to claim 3, characterized in that: The bottom end of the suction cup (10) is provided with an adsorption groove, and the top end of the suction cup (10) is provided with a pressure relief hole (13) which is connected to the adsorption groove. The mounting assembly further comprises a control block (14) which is arranged in the mounting base (1) and located at the opening position of the pressure relief hole (13) at the top end of the suction cup (10), a sealing block (19) which is arranged at the opening positions of the two connecting holes (17), and a control member which is arranged on the control block (14) and controls the sealing block (19) to move to the opening of the connecting hole (17) or away from the opening of the connecting hole (17); a through hole which is connected to the inside of the pressure relief hole (13) is provided on the bottom side of the control block (14), and connecting holes (17) which are connected to the through hole are provided on the left and right symmetrical sides of the control block (14).

5. A crane boom proximity detection device according to claim 4, characterized in that: The control member comprises a control screw rod (15) arranged parallel to the length direction of the control block (14) and above the top side surface of the control block (14), a moving rod (16) whose length direction is perpendicular to the rod body of the control screw rod (15) and whose middle part is sleeved on the rod body of the control screw rod (15) through a threaded connection, and elastic structures arranged at both ends of the moving rod (16) and respectively connected to different sealing blocks (19), wherein the elastic structure controls the two sealing blocks (19) to approach each other.

6. A crane boom proximity detection device according to claim 5, characterized in that: The elastic structure comprises a fixed block fixedly arranged at positions on both sides of the bottom end of the moving rod (16), a telescopic rod (20) arranged along the length direction of the moving rod (16) and having two ends respectively fixedly connected to the fixed block and the adjacent end surface of the sealing block (19), and a limit spring (21) movably sleeved on the rod body of the telescopic rod (20) and having two ends respectively connected to the fixed block and the adjacent end surface of the sealing block (19); when the end surface of the sealing block (19) is attached to the side surface of the control block (14), the limit spring (21) is in a compressed state.

7. A method for detecting the proximity of a crane boom, characterized in that: The following steps are involved: Step 1: installing the dual-mode host (2), the single-mode host (3) and the sound and light alarm (4) at the end of the boom moving end, the middle of the boom, the crane cab and the command center respectively through the installation components, and the near-electric induction antenna and millimeter-wave radar arranged on the dual-mode host (2) and the single-mode host (3) detect the detection distance between the boom and the high-voltage line; Step 2: Set up a router at the construction site to form a local area network for data transmission; Step 3: Obtain the detection data collected by the dual-mode host (2) and the single-mode host (3), and transmit it to the mobile terminal via a WiFi connection; Step 4: Set the warning distance between the boom and the high-voltage line through the software app on the mobile terminal; Step 5: Obtain the detection data collected in step 3, and compare the detection data with the warning distance. When the detection distance collected by the detection data is less than or equal to the warning distance, send a signal to the sound and light alarm (4) to control the sound and light alarm (4) to emit a sound and light alarm.

Images