A safety distance measuring device for lifting equipment and lifting equipment

Abstract

This invention relates to a safety distance measuring device for lifting equipment and the lifting equipment itself. The safety distance measuring device includes a base, a drive unit, a detection device, and a control unit. The base is fixed to the end of the boom of the lifting equipment. The detection device includes a measuring unit, a first trigger, and multiple second triggers. The measuring unit can measure the distance between a nearby object and the end of the boom. The drive unit can drive the measuring unit to rotate relative to the base around a rotation axis. The second triggers are evenly spaced circumferentially along the rotation axis. Of the first and second triggers, one is fixed relative to the base, and the other is fixed relative to the measuring unit. The first trigger can sequentially and individually trigger each of the second triggers. The triggered second trigger can send a trigger signal to the control unit, which can acquire the distance signal from the measuring unit. The safety distance measuring device can measure the distance and orientation of nearby objects at the end of the lifting equipment, improving operational safety.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, specifically to a safety distance measuring device and lifting equipment for lifting equipment. Background Technology

[0002] Safety in production is of paramount importance to power construction companies. Cranes are the main equipment for the construction, renovation, expansion, and maintenance of substations. Above the crane boom are many pieces of equipment and conductors of different diameters, steel beams, insulator strings, etc., some of which are energized and some are not. Because it is difficult to measure the distance between the boom and the energized or non-energized objects above, the boom may get too close to the objects above, causing high-voltage discharge or collision accidents in the power system, damaging the crane or power equipment, and endangering personal safety and the power grid supply safety.

[0003] Crane operations rely heavily on designated personnel to ensure lifting safety. However, these personnel often struggle to quantitatively determine the safe spatial distance between the boom tip and nearby objects, resorting only to estimations that are inaccurate. Communication between operators and supervisors is limited, and operators must consider numerous factors, increasing the likelihood of human error. Therefore, accurately determining the distance and orientation between the boom tip and nearby objects remains a challenge, a weak point, and a gap in construction safety management. Summary of the Invention

[0004] The purpose of this invention is to provide a safety distance measuring device and lifting equipment for lifting equipment, which can measure the distance and orientation of objects near the end of the lifting equipment, thereby improving operational safety.

[0005] To solve the above-mentioned technical problems, the present invention provides a safety distance measuring device for lifting equipment, comprising a base, a drive unit, a detection device, and a control unit; the base is fixedly mounted on the end of the boom of the lifting equipment; the detection device includes a measuring unit, a first trigger element, and multiple second trigger elements; the measuring unit is capable of measuring the distance between a nearby object and the end of the boom; the drive unit is capable of driving the measuring unit to rotate relative to the base around a rotation axis; each of the second trigger elements is evenly spaced circumferentially along the rotation axis; one of the first trigger element and the second trigger element is fixed relative to the base, and the other is fixed relative to the measuring unit; the first trigger element can sequentially and individually trigger each of the second trigger elements as the measuring unit rotates; the triggered second trigger element can send a trigger signal to the control unit, and the control unit can simultaneously acquire the distance signal of the measuring unit.

[0006] During the lifting operation, the drive unit can continuously drive the measuring unit to rotate. The control unit can detect the distance and orientation information of nearby objects at the end of the boom based on the detection device. When the distance of a nearby object in a certain direction is not greater than the safe distance, a prompt message can be issued through the display device and alarm device so that timely measures can be taken to avoid safety hazards.

[0007] Optionally, the measuring unit includes a microwave radar, the detection range of which is not less than a safe distance, the horizontal beam angle of which is α, the number of the second triggers is not less than 360° / α, and the vertical beam angle of which is β, and β is not less than 90°.

[0008] Optionally, the detection device further includes a rotating part, one end of which is provided with a mounting base for mounting the microwave radar, and the other end of which is provided with a trigger. When the microwave radar is mounted on the mounting base, the angle between the antenna surface of the microwave radar and the rotation axis is 45°, and the antenna surface is oriented towards the side away from the base.

[0009] Optionally, the number of mounting bases is two, and the two mounting bases are arranged symmetrically about the rotation axis.

[0010] Optionally, the rotating part includes a cylindrical body, one end of which is provided with a mounting plate for mounting a trigger element, and the other end of which is provided with a flange plate, the flange plate being fixedly mounted with the mounting seat; the inner wall of the mounting plate is also provided with a mounting hole for mounting the trigger element.

[0011] Optionally, the inner wall of the mounting plate is provided with mounting protrusions along the circumferential direction, and the mounting holes are provided on the mounting protrusions.

[0012] Optionally, the control unit further includes a counter, which is used to cyclically record the number of the second triggers triggered by the first trigger, and when the number recorded by the counter reaches the total number of the second triggers, the counter is reset to zero and enters the next counting cycle.

[0013] Optionally, it also includes a battery and a power supply unit. The battery is disposed on the base and is used to supply power to the drive unit and the trigger fixed relative to the base. The power supply unit is used to supply power to the trigger fixed relative to the measuring unit and the measuring unit.

[0014] Optionally, the power supply unit includes a power receiving coil and a power transmitting coil, the power transmitting coil being fixed relative to the base, and the power receiving coil being able to rotate with the measuring unit relative to the power transmitting coil.

[0015] Optionally, the base is further provided with a power box on the side facing the rotating part. The power box includes an upper box and a lower box. The lower box is fixed to the base. The upper box can be fastened and fixed to the lower box and surrounds the lower box to form a cavity for placing the power transmitting coil.

[0016] Optionally, magnetic shielding sheets are provided on the side of the power transmitting coil away from the power receiving coil and on the side of the power receiving coil away from the power transmitting coil.

[0017] Optionally, the first trigger is a photoelectric transmitter and the second trigger is a photoelectric receiver.

[0018] Optionally, the system further includes a clamping mechanism, which comprises a clamping part, a connecting part, an adjusting part, and a tray. The connecting part is connected between the clamping part and the tray. The tray can be fixed to the base. The clamping part is clamped and fixed to the end wing plate of the boom. The adjusting part includes an adjusting component, a transmission assembly, and a rotating shaft. The tray and the rotating shaft are fixed. The adjusting component can adjust the rotation of the rotating shaft through the transmission assembly and drive the tray to rotate relative to the connecting part.

[0019] The present invention also provides a lifting device, which includes a boom and a safety distance measuring device as described above.

[0020] The lifting equipment equipped with the aforementioned safety distance measuring device has a similar technical effect to the aforementioned safety distance measuring device, and will not be described in detail here for the sake of brevity. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the lifting equipment provided in an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Enlarged view of A in the middle;

[0023] Figure 3 This is a schematic diagram of the structure of the safe ranging device provided in the embodiment of the present invention;

[0024] Figure 4 yes Figure 3 Exploded view;

[0025] Figure 5 yes Figure 3 A sectional view;

[0026] Figure 6 This is a structural diagram showing the relative positions of the microwave radar and the end of the boom in the installed state;

[0027] Figure 7 This is a top view of the microwave radar's detection range;

[0028] Figure 8 It is a 3D diagram of the microwave radar detection range;

[0029] Figure 9 This is a schematic diagram of the photoelectric emitter when it is in its initial position;

[0030] Figure 10 This is a schematic diagram of the structure when the photodetector g1 is rotated to correspond with the phototransmitter m;

[0031] Figure 11 This is a schematic diagram of the structure when the photoelectric receiver g2 is rotated to correspond with the photoelectric emitter m;

[0032] Figure 12 This is a schematic diagram of the structure when the photodetector g11 is rotated to correspond with the phototransmitter m;

[0033] Figure 13 This is a schematic diagram of the rotating part without the flange plate;

[0034] Figure 14 This is an exploded view of the power supply box;

[0035] Figure 15 This is an exploded view of the drive unit and coupling;

[0036] Figure 16 This is a schematic diagram of a safety ranging device equipped with a clamping mechanism.

[0037] Appendix Figure 1-16 The reference numerals in the attached figures are explained as follows:

[0038] 100 - Safety distance measuring device; 200 - Lifting equipment; 210 - Crane boom; 220 - Crane boom end;

[0039] 1-Base, 11-Upper seat, 12-Lower seat, 13-Receiving cavity;

[0040] 2-Drive unit, 21-Spindle, 22-Drive circuit board;

[0041] 3-Rotating part, 31-Cylinder body, 32-Mounting plate, 33-Flange plate, 34-Mounting protrusion, 35-Mounting hole;

[0042] 4-Detection device, 41-Microwave radar, 411-Antenna surface, 42-Mounting base;

[0043] 51-First trigger, 52-Second trigger, 53-Circuit board;

[0044] 61-Battery, 62-Power transmitting coil, 63-Power receiving coil, 64-Switch;

[0045] 7-Power supply box, 71-Upper box, 72-Lower box;

[0046] 8-Magnetic shielding sheet;

[0047] 9-Clamping mechanism, 91-Clamping part, 92-Connecting part, 93-Adjusting part;

[0048] 10 - Coupling;

[0049] 101 - Positioning screw. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] This invention provides a safety distance measuring device 100 for a lifting device 200 and a lifting device 200, wherein, as shown in the embodiments of the present invention, a safety distance measuring device 100 for a lifting device 200 and a lifting device 200 are provided. Figure 1 and Figure 2 As shown, the lifting equipment 200 includes a boom 210, and a safety distance measuring device 100 is provided at the end 220 of the boom. The safety distance measuring device 100 can be used to detect the distance and orientation of objects near the end 220 of the boom during operation, so as to avoid the end 220 of the boom from getting too close to the nearby objects, causing high voltage discharge or collision accidents in the power system, damaging the lifting equipment 200 or the power equipment, thereby ensuring the safety of the lifting equipment 200 during operation.

[0052] like Figure 3 As shown, the safety distance measuring device 100 includes a base 1, a drive unit 2, a detection device, and a control unit. The base 1 is fixed to the end 220 of the boom of the lifting equipment 200. The detection device includes a measuring unit 4, a first trigger 51, and multiple second triggers 52. The measuring unit 4 can measure the distance between a nearby object and the end 220 of the boom. The drive unit 2 can drive the measuring unit 4 to rotate relative to the base 1 around a rotation axis. The second triggers 52 are evenly spaced along the circumference of the rotation axis. One of the first triggers 51 and the second triggers 52 is fixed relative to the base 1, and the other is fixed relative to the measuring unit 4.

[0053] In this context, the nearest object refers to the object closest to the boom end 220. During the rotation of the measuring unit 4 relative to the base 1 by the drive unit 2, the first trigger 51 and the second trigger 52 can also rotate relative to each other. Furthermore, the first trigger 51 can sequentially pass through and trigger each of the second trigger 52. The triggered second trigger 52 can send a trigger signal to the control unit, and simultaneously, the control unit can acquire the distance signal of the measuring unit 4. The control unit can determine the location of the object corresponding to the distance signal based on the second trigger 52 corresponding to the trigger signal. Specifically, how the second trigger 52 sends a trigger signal to the control unit after being triggered, and how the control unit acquires the distance signal of the measuring unit 4 based on the trigger signal, are well-known existing technologies to those skilled in the art, and will not be elaborated upon here for the sake of brevity.

[0054] The first trigger 51 can only trigger one of the second triggers 52 at a time. When the measuring unit 4 rotates relative to the base 1 and the first trigger 51 triggers one of the second triggers 52, the second trigger 52 will send a trigger signal to the control unit. At the same time, the measuring unit 4 will also send the distance signal it has measured to the control unit. The distance signal and the trigger signal correspond one-to-one. The distance signal refers to the distance between the nearby object and the end of the boom 220. The orientation of the nearby object can be known through the trigger signal.

[0055] Since the second trigger 52 is arranged circumferentially along the rotation axis of the rotating part 3, after the measuring part 4 rotates one revolution relative to the base 1, the control part can obtain the distance and orientation information of the nearby objects in the 360° circle sent by the detection device. If the distance of the nearby objects in this circle is greater than the safe distance, no danger will occur, and safety will be guaranteed. If the distance of the nearby objects is less than the safe distance, the specific orientation can be determined according to the orientation information corresponding to the distance information, and the investigation can be carried out to ensure safety.

[0056] Specifically, it could be as follows: Figure 5 The first trigger 51 shown is fixed relative to the base 1, and the second trigger 52 is fixed relative to the measuring part 4 and can rotate with the measuring part 4. The measuring part 4 drives all the second triggers 52 to rotate. Each second trigger 52 can be triggered when it rotates to correspond with the first trigger 51. Alternatively, the first trigger 51 can be fixed relative to the measuring part 4 and can rotate with the measuring part 4, while the second trigger 52 is fixed relative to the base 1. When the measuring part 4 rotates, it can drive the first trigger 51 to rotate, and when the first trigger 51 rotates to correspond with a second trigger 52, it can trigger that second trigger 52.

[0057] In this embodiment, the first trigger 51 is a photoelectric emitting tube, and the second trigger 52 is a photoelectric receiving tube. The photoelectric emitting tube always emits light. When the photoelectric receiving tube rotates to correspond with the photoelectric emitting tube, the photoelectric receiving tube can receive the light emitted by the photoelectric emitting tube and be triggered, thereby sending a trigger signal to the control unit.

[0058] During lifting operations, the drive unit 2 continuously drives the measuring unit 4 to rotate, thereby enabling real-time monitoring of the distances to nearby objects in different directions around the boom end 220. When the distance to a nearby object in a certain direction is not greater than the safe distance, a warning message can be issued through the display device and alarm device to facilitate timely measures and avoid potential safety hazards. The safe distance refers to a specific numerical value (e.g., 16 meters in this embodiment). When the distance to a nearby object is greater than the safe distance, it indicates that the object is in a safe position relative to the boom end 210. When the distance to a nearby object is not greater than the safe distance, it indicates that the nearby object poses a safety hazard and needs to be addressed promptly. This improves safety during operations.

[0059] In this embodiment, the measuring unit 4 includes a microwave radar 41, such as... Figure 6 and Figure 7 As shown, the main performance parameters of the microwave radar 41 include the detection range L, the horizontal lobe angle α, and the vertical lobe angle β. The detection range L is not less than the safe distance, ensuring that all objects within the safe distance range can be detected. The field of view of the microwave radar 41 is α×β, reflecting the energy concentration of the microwave radar 41 beam. Figure 8 As shown, within the fan-shaped area (hereinafter referred to as "sector") enclosed by the detection range L, the horizontal lobe angle α, and the vertical lobe angle β, target objects of a certain size can be detected by the radar. The number of second trigger elements 52 is not less than 360° / α, thereby ensuring that the detection device can achieve 360° all-round detection without blind spots along the circumference.

[0060] Of course, in this embodiment, the measuring unit 4 can also detect the distance of an object in other ways, such as infrared, ultrasonic, laser, etc. Multiple sectors can be set by the first trigger 51 and the second trigger 52, and the distance of the object in each sector can be detected. The microwave radar 41 is not affected by temperature, humidity, noise, airflow, dust, light, etc., making it suitable for harsh environments. It also has strong anti-radio frequency interference capability, long detection distance, good microwave directionality, speed equal to the speed of light, and low output power, posing no harm to the human body.

[0061] like Figure 3 and Figure 4As shown, the detection device also includes a rotating part 3, which is connected to the main shaft 21 of the drive part 2 via a coupling 10. One end of the rotating part 3 is provided with a mounting base 42 for mounting the microwave radar 41, and the other end of the rotating part 3 is provided with a trigger element. When the microwave radar 41 is mounted on the mounting base 42, the angle between the antenna surface 411 of the microwave radar 41 and the rotation axis is 45°, and the antenna surface 411 is oriented towards the side away from the base 1. Figure 6 As shown, the included angle (vertical lobe angle β) between the two boundaries of the detection range of microwave radar 41 is not less than 90°. That is to say, the included angle is a right angle or an obtuse angle. One boundary extends beyond the vertical direction, and the other boundary extends beyond the horizontal direction. After one lap of detection, a complete hemispherical area can be formed.

[0062] like Figure 3 and Figure 4 As shown, there are two mounting bases 42, which are symmetrically arranged about the axis of rotation. This arrangement ensures that the mounting bases 42 can maintain balance during the rotation of the rotating part 3, preventing wobbling. Specifically, only one of the two mounting bases 42 may be equipped with a microwave radar 41, or both mounting bases 42 may be equipped with microwave radar 41. The two microwave radars 41 are redundant, and only one is in working state at any given time.

[0063] like Figure 5 As shown, the rotating part 3 includes a cylindrical body 31, with flange plates 33 and mounting plates 32 at both ends. The flange plates 33 are used to fix the mounting base 42, and the mounting plates 32 are used to mount the trigger element. A coupling 10 is located inside the cylindrical body 31 and coaxial with it. The coupling 10 is fixed to the flange plates 33 and mounting plates 32. The driving part 2 is a motor located on the base 1. The main shaft 21 of the motor is located inside the coupling 10, and... Figure 15 As shown, the coupling 10 and the main shaft 21 are positioned by a positioning screw 101 to prevent relative rotation, thereby ensuring stable transmission.

[0064] Of the flange plate 33 and mounting plate 32 at both ends of the cylinder 31, one is integrally formed with the cylinder 31, and the other can be installed and fixed to the cylinder 31 by fasteners. Alternatively, the flange plate 33 and the mounting plate 32 can be installed and fixed to the cylinder 31 by fasteners respectively.

[0065] The mounting plate 32 is provided with mounting holes 35 for mounting triggers. The second trigger 52 is mounted on the rotating part 3. Therefore, the number of mounting holes 35 is the same as the number of the second triggers 52. The mounting holes 35 are evenly spaced along the circumference of the mounting plate 32. If the first trigger 51 is mounted on the rotating part 3, the mounting plate 32 only needs to be provided with one mounting hole 35.

[0066] like Figure 5 As shown, each second trigger 52 is also connected to a circuit board 53, which is located inside the cylinder 31. The same circuit board 53 is connected to each of the second triggers 52 simultaneously. Alternatively, each second trigger 52 can be configured as a separate element that can send a signal to the control unit after being triggered. By connecting each of the second triggers 52 to a single circuit board 53, the overall structure can be simplified when sending a trigger signal after being triggered.

[0067] like Figure 13 As shown, the inner wall of the mounting plate 32 is provided with mounting protrusions 34 along the circumference, and each mounting hole 35 is respectively provided on the mounting protrusions 34. The mounting protrusions 34 are provided along the circumference of the inner wall of the mounting plate 32 and have a ring structure. Specifically, the mounting protrusions 34 can increase the length of the mounting holes 35 to ensure the stable installation of the second trigger 52.

[0068] The safe ranging device 100 includes a battery 61 and a power supply unit. For example... Figure 4 and Figure 5 As shown, the base 1 includes an upper body 11 and a lower body 12. The upper body 11 covers the lower body 12 and forms a receiving cavity 13. The drive unit 2 is a motor located in the receiving cavity 13. The receiving cavity 13 also contains a drive circuit board 22 connected to the motor, a battery 61, and a switch 64 for controlling the battery 61 and the power supply unit. The battery 61 is located in the receiving cavity 13 of the base 1 and supplies power to the drive unit 2 and the trigger element fixed relative to the base 1. The power supply unit supplies power to the trigger element located in the rotating part 3 and the measuring part 4. In this embodiment, the battery 61 supplies power to the motor and the first trigger element 51, and the power supply unit supplies power to the circuit board 53 and the measuring part 4. Both the battery 61 and the power supply unit are wirelessly powered, which simplifies the overall structure and allows for continued operation even in the event of a power outage at the work site, making it highly adaptable.

[0069] Specifically, the power supply unit includes a power receiving coil 63 and a power transmitting coil 62, such as... Figure 5 As shown, the power transmitting coil 62 and the power receiving coil 63 are located on both sides of the mounting plate 32. The power transmitting coil 62 is fixed relative to the base 1, and the power receiving coil 63 is located inside the cylinder 31. When the rotating part 3 rotates, it can drive the power receiving coil 63 to rotate relative to the power transmitting coil 62, thereby realizing the power supply to the circuit board 53 and the measuring part 4.

[0070] Specifically, the mounting protrusion 34 can be a continuous annular structure, or multiple protrusions can be arranged at intervals along the annular structure. For example... Figure 5As shown, the second trigger 52 is installed in the mounting hole 35 of the mounting protrusion 34, and the circuit board 53 is located at the top of the mounting protrusion 34. The mounting protrusion 34 can form an intermittent or continuous ring structure in the circumferential direction. The power receiving coil 63 is located in the ring structure, and the thickness of the power receiving coil 63 is less than the height of the mounting protrusion 34 to avoid the circuit board 53 directly contacting the power receiving coil 63 and causing interference to the circuit board 53.

[0071] The base 1 is also equipped with a power supply box 7 on the side facing the rotating part 3, such as... Figure 5 and Figure 14 As shown, the power supply box 7 includes an upper box body 71 and a lower box body 72. The lower box body 72 is fixed to the base 1, and the upper box body 71 faces the rotating part 3. The upper box body 71 can be fastened and fixed to the lower box body 72, forming a cavity between them. This cavity is used to house the power transmitting coil 62. Of course, in this embodiment, the power transmitting coil 62 can also be placed inside the base 1. The arrangement of the power supply box 7 further allows the distance between the power transmitting coil 62 and the power receiving coil 63 to be closer, ensuring power transmission. Furthermore, the upper box body 71 is positioned facing the cylindrical body 31, and the photoelectric emitting tube is fixed to the upper box body 71.

[0072] Of course, in this embodiment, a battery 61 can also be installed inside the rotating part 3 for power supply. By placing only a portion of the power supply unit (power receiving coil 63) inside the rotating part 3, the overall weight of the rotating part 3 can be effectively reduced, thereby reducing the power consumption of the drive unit 2. Alternatively, the power supply unit can be configured as a slip ring. When short-range wireless power supply is achieved through the power transmitting coil 62 and the power receiving coil 63, the overall structure can be simplified, and the cost is low and the stability is good.

[0073] In addition, a magnetic shielding sheet 8 is provided on the side of the power transmitting coil 62 away from the power receiving coil 63 (i.e. the side facing the lower housing 72). The magnetic shielding sheet 8 can prevent high-energy electromagnetic waves from interfering with the drive circuit board 22. Furthermore, a magnetic shielding sheet 8 is also provided on the side of the power receiving coil 63 away from the power transmitting coil 62 to prevent it from interfering with the circuit board 53 connected to the second trigger 52.

[0074] In this embodiment, the control unit is also equipped with an alarm device. When a nearby object is detected to be within a safe distance, an alarm signal can be emitted through the alarm device, which can be either an audible signal or a photoelectric signal. Simultaneously, the control unit can also display the detection results (including distance and orientation information of the nearby object) through a display device. When receiving information within a detection cycle, the control unit can process it in the following two ways:

[0075] The first method is to compare the distance of objects in each sector with the safe distance in real time. When the distance of an object is not greater than the safe distance, the distance and location of the corresponding object are displayed on the display device and announced by voice, so as to facilitate timely investigation.

[0076] The second method is that after the control unit has completed the detection of all 12 sectors, it compares these 12 sets of data and obtains the data with the smallest value. This data is then compared with the safe distance. If the distance of the object is not greater than the safe distance, the distance and location of the corresponding object are displayed on the display device and announced by voice. If the distance of all objects in the 12 sectors is not less than the safe distance, no voice announcement is needed, and the next detection cycle can be directly entered.

[0077] When the control unit processes information using the second method described above, the control unit also includes a counter. The counter is used to record the number of second triggers 52 triggered by the first trigger 51. In this embodiment, there are a total of 12 second triggers 52. Whenever a second trigger 52 passes by the first trigger 51, the counter will automatically increment by 1. After each first trigger 51 passes by and triggers 12 triggers in sequence, the counter will automatically reset to zero and enter the next counting cycle.

[0078] The working principle of the safety ranging device 100 provided in this embodiment will be described in detail below.

[0079] In this embodiment, the detection range of the microwave radar 41 is L = 25 meters, the horizontal lobe angle α is approximately 32°, and the vertical lobe angle β is approximately 90°. Figure 6 As shown, the antenna surface 411 of the microwave radar 41 is at a 45° angle to the horizontal plane. Under the driving action of the drive unit 2, the microwave radar 41 can cover the entire hemispherical airspace with a radius of about 25 meters and a 360° angle in front of the boom end 220 in one rotation. When an object falls into this airspace, it will be detected. There are 12 second triggers 52. The entire hemispherical airspace that the microwave radar 41 can detect is divided into 12 sectors, from sector 0 to sector 11. Each sector is 30° and does not exceed the horizontal beam angle of the microwave radar 41 of 32°. That is to say, the coverage of adjacent sectors overlaps slightly. This is mainly because the radar echo is weaker at the edge of the beam angle. A small overlap helps to ensure that targets at the edge of the beam angle can be detected without blind spots. By reading the detection data of microwave radar 41 in different sectors and storing it in the corresponding position variables, azimuth data and distance data can be obtained simultaneously. The control unit can display the specific distance and azimuth of the nearest object to the end of the crane within the entire hemispherical airspace through a display or voice broadcast, thereby accurately locking the position of the nearby object.

[0080] Twelve photoelectric receivers (i.e., second triggers 52) are evenly arranged around the circumference of the mounting plate 32. These twelve photoelectric receivers are numbered g0 to g11 respectively, which is equivalent to dividing a circle into twelve equal sectors. This corresponds to dividing the entire hemispherical airspace in front of the microwave radar 41 into twelve sectors as described above. One photoelectric transmitter (first trigger 51) m is fixed to the upper box 71 of the power supply box, its position remains unchanged, and it continuously emits light.

[0081] Figure 9-12 In the process, the microwave radar 41 scans 360° in one scanning cycle. When it passes through different sectors, it drives each photoelectric receiver tube to receive the optical signal of the photoelectric transmitter tube m and is thus triggered.

[0082] like Figure 9 As shown, sector 0 serves as the initial position of microwave radar 41. When microwave radar 41 rotates to sector 0, it can detect the distance of objects located within sector 0. The photoelectric transmitter m corresponds to the photoelectric receiver g0. The photoelectric receiver g0 receives the light signal from the photoelectric transmitter m and is triggered. The control unit sends a data reading command to microwave radar 41 using an interrupt method and obtains the distance and orientation of objects within sector 0. The result is stored in the global variable n0, and the counter is automatically incremented by 1, i.e., k=0+1=1.

[0083] Specifically, the interrupt mode adopted by the control unit means that the control unit suspends the current program and executes the interrupt task, including reading the distance and orientation in the corresponding sector, storing the result in a global variable, incrementing the counter by 1, and then the control unit controls the program to continue execution.

[0084] Specifically, after the microwave radar 41 starts working, regardless of which sector the microwave radar 41 is in, a new scanning cycle will begin when the microwave radar 41 rotates to sector 0.

[0085] Drive unit 2 drives rotating unit 3 to rotate, rotating unit 3 drives measuring unit 4 to rotate, and simultaneously drives photoelectric receiving tube to rotate relative to photoelectric emitting tube, such as Figure 10 As shown, when the microwave radar 41 rotates to the position of sector 1, that is, the photoelectric receiver g1 rotates to correspond with the photoelectric transmitter m, the photoelectric receiver g1 receives the light signal from the photoelectric transmitter m and is triggered. The control unit sends a data reading command to the microwave radar 41 in the interrupt mode and obtains the distance and orientation of the object in sector 1. The result is stored in the global variable n1, and the counter is automatically incremented by 1, that is, k=1+1=2.

[0086] like Figure 11As shown, when the microwave radar 41 rotates to the position of sector 2, that is, the photoelectric receiver g2 receives the light signal of the photoelectric transmitter m and is triggered, the control unit sends a data reading command to the microwave radar 41 and obtains the distance and orientation of the object in sector 2, stores the result in the global variable n2, and the counter is automatically incremented by 1, that is, k=2+1=3.

[0087] Similarly, the rotating part 3 rotates, causing the photoelectric receiver to rotate relative to the photoelectric transmitter. The photoelectric transmitter passes through and triggers each photoelectric receiver in sequence until... Figure 12 As shown, when the microwave radar 41 rotates to the position of sector 11, that is, when the photoelectric receiver g11 rotates to correspond with the photoelectric transmitter m, the photoelectric receiver g11 receives the light signal from the photoelectric transmitter m and is triggered. The control unit sends a data reading command to the microwave radar 41 in an interrupt mode and obtains the distance and orientation of the object in sector 11. The result is stored in the global variable n11, and the counter is automatically incremented by 1, that is, k=11+1=12. That is, the technical variable k recorded by the technical device reaches the total number of photoelectric receivers 12. The microwave radar 41 has completed the detection of objects in 12 sectors. The control unit first compares these 12 sets of global variables n0~n11 and obtains the data with the smallest value. This data is compared with the safe distance. If the distance of the object is not greater than the safe distance, it is displayed on the display device and an alarm signal is issued through the alarm device to indicate the distance and orientation of the corresponding object. If the distance of all objects in 12 sectors is not less than the safe distance, no voice broadcast is required, and the next detection cycle is directly entered until the control unit receives a stop scanning command.

[0088] This achieves full coverage of all targets within a 360-degree radius of the microwave radar's detection range, extending from the 220mm tip of the boom. The microwave radar's target detection data refresh rate is 50Hz, or 50 times per second. The control unit reads data 12 times per second, far below this value, so there's no need to worry about data overload.

[0089] The safety ranging device 100 provided in this embodiment also includes a clamping mechanism 9, which can fix the safety ranging device 100 to the end 220 of the boom. Specifically, as shown in the figure... Figure 16As shown, the clamping mechanism 9 includes a clamping part 91, a connecting part 92, an adjusting part 93, and a tray. The connecting part 92 connects the clamping part 91 and the tray, which is used to fix the base 1. The clamping part 91 clamps and fixes the end wing plate of the boom 210. The adjusting part 93 includes an adjusting component (such as a handle, motor, etc.), a transmission component (such as a worm gear, gear assembly, etc.), and a rotating shaft. The rotating shaft is fixed to the tray. The adjusting component can adjust the rotation of the rotating shaft through the transmission component, thereby causing the tray to rotate relative to the connecting part 92. That is, after the clamping part 91 is clamped and fixed to the wing plate of the boom 210, the adjusting component is operated to adjust the rotation of the rotating shaft through the transmission component, thereby causing the tray to rotate to adjust the angle of the tray, so that the rotation axis of the rotating part 3 is approximately parallel to the vertical direction. At this time, the angle between the antenna surface 411 of the microwave radar 41 and the horizontal plane is approximately 45°, and the detected hemispherical area is almost entirely above the end of the boom 210, ensuring more comprehensive detection results.

[0090] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A safety distance measuring device for lifting equipment, characterized in that, Includes a base (1), a drive unit (2), a detection device, and a control unit; The base (1) is fixed to the end (220) of the boom of the lifting equipment (200). The detection device includes a measuring unit (4), a first trigger (51) and a plurality of second triggers (52). The measuring unit (4) is capable of measuring the distance between a nearby object and the end of the boom (220). The driving unit (2) is capable of driving the measuring unit (4) to rotate relative to the base (1) about the rotation axis. Each of the second triggers (52) is evenly spaced along the circumference of the rotation axis. Of the first trigger (51) and the second trigger (52), one is fixed relative to the base (1) and the other is fixed relative to the measuring part (4). The first trigger (51) can trigger each of the second triggers (52) in sequence as the measuring part (4) rotates. The triggered second trigger (52) can send a trigger signal to the control part, and at the same time, the control part can obtain the distance signal of the measuring part (4). The measuring unit (4) includes a microwave radar (41), the detection range of which is not less than a safe distance; The detection device also includes a rotating part (3), one end of which is provided with a mounting base (42) for mounting the microwave radar (41), and the other end of which is provided with a trigger. When the microwave radar (41) is mounted on the mounting base (42), the angle between the antenna surface (411) of the microwave radar (41) and the rotation axis is 45°, and the antenna surface (411) is set towards the side away from the base (1). The number of the mounting bases (42) is two, and the two mounting bases (42) are arranged symmetrically about the rotation axis; The rotating part (3) includes a cylindrical body (31), one end of which is provided with a mounting plate (32) for mounting a trigger, and the other end of which is provided with a flange plate (33), and the mounting seat (42) is fixedly mounted on the flange plate (33). The inner wall of the mounting plate (32) is also provided with mounting holes (35), which are used to install the trigger; The inner wall of the mounting plate (32) is provided with mounting protrusions (34) along the circumferential direction, and the mounting holes (35) are provided on the mounting protrusions (34). Each of the second triggers (52) is also connected to a circuit board (53) located inside the cylinder (31). The circuit board (53) is connected to each of the second triggers (52) to send a trigger signal after being triggered.

2. The safety distance measuring device for lifting equipment according to claim 1, characterized in that, The horizontal beam angle of the microwave radar (41) is α, the number of the second trigger (52) is not less than 360° / α, and the vertical beam angle of the microwave radar (41) is β, and β is not less than 90°.

3. The safety distance measuring device for lifting equipment according to claim 1 or 2, characterized in that, The control unit also includes a counter, which is used to cyclically record the number of second triggers (52) triggered by the first trigger (51), and when the number recorded by the counter reaches the total number of second triggers (52), the counter is cleared and enters the next counting cycle.

4. The safety distance measuring device for lifting equipment according to claim 1 or 2, characterized in that, It also includes a battery (61) and a power supply unit. The battery (61) is located on the base (1) and is used to supply power to the drive unit (2) and the trigger fixed relative to the base (1). The power supply unit is used to supply power to the trigger fixed relative to the measuring unit (4) and the measuring unit (4).

5. The safety distance measuring device for lifting equipment according to claim 4, characterized in that, The power supply unit includes a power receiving coil (63) and a power transmitting coil (62). The power transmitting coil (62) is fixed relative to the base (1), and the power receiving coil (63) can rotate relative to the power transmitting coil (62) with the measuring unit (4).

6. The safety distance measuring device for lifting equipment according to claim 5, characterized in that, The base (1) is also provided with a power box (7) on the side facing the rotating part (3). The power box (7) includes an upper box body (71) and a lower box body (72). The lower box body (72) is fixed to the base (1). The upper box body (71) can be fastened and fixed to the lower box body (72) and together with the lower box body (72) form a cavity for placing the power transmitting coil (62).

7. The safety distance measuring device for lifting equipment according to claim 5, characterized in that, The side of the power transmitting coil (62) away from the power receiving coil (63) and the side of the power receiving coil (63) away from the power transmitting coil (62) are respectively provided with magnetic shielding sheets (8).

8. The safety distance measuring device for lifting equipment according to claim 1 or 2, characterized in that, The first trigger (51) is a photoelectric transmitter, and the second trigger (52) is a photoelectric receiver.

9. The safety distance measuring device for lifting equipment according to claim 1 or 2, characterized in that, It also includes a clamping mechanism (9), which includes a clamping part (91), a connecting part (92), an adjusting part (93) and a tray, wherein the connecting part (92) is connected between the clamping part (91) and the tray; The tray can be fixed to the base (1); The clamping part (91) is clamped and fixed to the end wing plate of the boom (210); The adjustment part (93) includes an adjustment component, a transmission assembly and a rotating shaft. The tray and the rotating shaft are fixed. The adjustment component can adjust the rotation of the rotating shaft through the transmission assembly and drive the tray to rotate relative to the connecting part (92).

10. A lifting device, characterized in that, It includes a boom (210) and a safety ranging device as described in any one of claims 1-9.

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