Method and device for judging swing range of hoisted object in crane practical operation examination

Abstract

The present application belongs to the technical field of crane examination, and particularly relates to a method and device for judging the swing range of a hoisted object in crane practical operation examination, which comprises a bucket device connected with a hook device on a crane, and a judging mechanism connected with an upper computer of an examination center through a wireless transmission module is installed at the upper end of the bucket device, the judging mechanism comprises a liquid-filled cylinder, a sealed cylinder, a first signal generator, a processor and a power supply, the liquid-filled cylinder is connected with the upper end of the bucket device and internally contains a liquid medium, a mounting disc is arranged at the upper end of the sealed cylinder, a plurality of first signal generators are evenly arranged on the mounting disc in a circumferential direction and connected with the processor through wires, and a trigger float is arranged in the sealed cylinder and vertically aligned with each first signal generator, the device has a simple structure, does not involve complex judging algorithms, has a quick detection response, can accurately reflect the inclination degree of the bucket body, and improves the judging efficiency and accuracy of the practical operation examination.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crane examination, and particularly discloses a method and device for judging swing amplitude of a hoisted object in crane practical operation examination. BACKGROUND

[0002] A crane refers to a multi-action hoisting machine for vertically lifting and horizontally transporting heavy objects in a certain range, also known as a trolley, a flight, and a hoist. The crane is large in size, complex in structure, and needs to run in a large space. An operator needs to operate according to the operation specification to complete the hoisting, running, and unloading of goods, and improper operation will cause serious safety accidents and economic losses. Therefore, the practical operation examination of the crane operator is extremely important, and the practical operation level of the operator needs to be accurately tested.

[0003] In the current practical operation examination, the swing amplitude (i.e., the inclination angle) of the hoisted object is determined by manually observing whether the hoisted object collides with a marker. The patent application file with the application number CN202411155309.8 discloses a method and system for evaluating the practical operation of a crane operator, wherein the angle recognition and judgment algorithm used is as follows: nine markers are arranged in the field, and an inclination sensor is installed at the top of each marker. The inclination sensor automatically generates angle information. When the bucket collides with the marker, the marker will produce an inclination angle, and the inclination angle of the bucket is replaced by the inclination angle of the marker. In the above evaluation method, the collision between the bucket and the marker is accidental, the inclination direction of the bucket is randomly multi-directional, the situation is complex, the inclination angle error of the marker is large, and the inclination degree of the bucket cannot be accurately reflected. Moreover, the markers are arranged at intervals, the inclination angle of the bucket cannot be detected throughout the process, and it is difficult to accurately test the practical operation level of the operator. SUMMARY

[0004] The present application aims at the deficiencies of the prior art, and provides a method and device for judging swing amplitude of a hoisted object in crane practical operation examination.

[0005] The present application is implemented by the following technical solutions:

[0006] A device for judging swing amplitude of a hoisted object in crane practical operation examination, comprising a bucket device connected with a hook device on a crane, wherein an upper end of the bucket device is provided with a judgment mechanism, and the judgment mechanism is connected with an upper computer of an examination center through a wireless transmission module.

[0007] The judgment mechanism comprises a liquid-filled cylinder, a sealing cylinder, a first signal generator, a processor and a power supply, the liquid-filled cylinder is connected with the upper end of the bucket device, and the liquid-filled cylinder contains liquid medium, the sealing cylinder is sealingly connected with the upper end of the liquid-filled cylinder, the upper end of the sealing cylinder is provided with a mounting circular plate, a plurality of first signal generators are uniformly arranged on the mounting circular plate in a circumferential direction, the processor is arranged at the center of the mounting circular plate, and the first signal generator is connected with the processor through a wire;

[0008] A trigger float aligned with each first signal generator is arranged in the sealing cylinder, the trigger float comprises a vertical limiting sliding rod penetrating through the bottom plate of the sealing cylinder, a floating ball connected with the lower end of the sliding rod and subjected to the buoyancy of the liquid medium, and a first trigger ball head connected with the upper end of the sliding rod and triggering the first signal generator.

[0009] As a further arrangement of the above-mentioned scheme, the judgment mechanism further comprises a second signal generator, a third signal generator and a fourth signal generator electrically connected with the processor through wires, a plurality of fourth signal generators, third signal generators, second signal generators and first signal generators are uniformly arranged on the mounting circular plate in a circumferential direction and are distributed in a diverging manner from inside to outside in sequence, and a trigger float is arranged in the sealing cylinder directly below each second signal generator, third signal generator and fourth signal generator.

[0010] As a further arrangement of the above-mentioned scheme, the first signal generator, the second signal generator, the third signal generator and the fourth signal generator are arranged in the same structure and comprise an outer shell and a signal generator device, the outer shell is fixedly arranged in a positioning hole on the mounting circular plate, and the signal generator device is fixedly mounted at the upper end of the outer shell, and the lower end of the outer shell is provided with an opening for the first trigger ball head to extend into.

[0011] As a further arrangement of the above-mentioned scheme, the signal generator device is an inductive proximity switch, and the first trigger ball head is made of metal material.

[0012] As a further arrangement of the above-mentioned scheme, the signal generator device is a contact type micro switch, and the lower end of the signal generator device is connected with a second conductive ball head on both sides through an elastic member, the first trigger ball head is made of conductive material, and the first trigger ball head is in contact with the second conductive ball heads on both sides after extending into the outer shell.

[0013] As a further arrangement of the above-mentioned scheme, the upper and lower ends of the sliding rod are provided with limiting plates, the upper limiting plate is located above the bottom plate of the sealing cylinder, the lower limiting plate is located below the bottom plate of the sealing cylinder, a return spring is sleeved on the sliding rod, and the two ends of the return spring are connected with the bottom plate of the sealing cylinder and the upper or lower limiting plate.

[0014] As a further arrangement of the above-mentioned scheme, the bottom plate of the liquid-filled cylinder is provided with a liquid discharge port, and the lower end of the liquid discharge port is provided with a maintenance valve.

[0015] As a further arrangement of the above-mentioned scheme, the bucket device comprises a counterweight bucket body, an installation circular groove for installing the determination mechanism is formed in the upper end of the counterweight bucket body, a fixing ring is fixedly connected to the upper end of the counterweight bucket body, and a lifting ring is connected to the fixing ring through a steel cable.

[0016] In addition, the application also discloses a crane practical operation examination judgment method using the crane practical operation examination swing amplitude judgment device.

[0017] (1) The determination mechanism is fixedly installed at the upper end of the bucket device, and is powered on and debugged, and after the debugging is completed, the examinee performs the practical operation examination;

[0018] (2) During the practical operation examination, the examinee first connects the bucket device with the hook device on the crane, and then performs the lifting, walking, turning and lowering operations according to the examination requirements;

[0019] (3) During the walking process, when the examinee operates properly, the bucket device does not swing or only slightly swings, at this time, the processor in the determination mechanism does not receive the electric signal; when the examinee operates improperly, the entire bucket device swings greatly together with the determination mechanism, so that the liquid medium filled in the liquid-filled cylinder is gathered to one side to keep a horizontal state, so that the corresponding trigger float is lifted by the buoyancy, and then the first trigger ball head triggers the first signal generator to generate an electric signal and feed back to the processor, and then the processor wirelessly transmits the information to the upper computer of the examination center;

[0020] (4) After the examination is completed, the upper computer judges and scores according to the received electric signal and the number of times of generation of the electric signal, and then comprehensively judges whether the examination is qualified in combination with other requirements of the examinee during the practical operation examination.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] The crane practical operation examination object swing range judgment device disclosed in the application is characterized in that: a special designed judgment mechanism is used in the process of hoisting the counterweight bucket for practical operation examination, liquid medium in the liquid cylinder tends to keep relative horizontal in the process of tilting and swinging, and is gathered to one side of the tilt, and then the buoy device and the first signal generator are combined to tilt and swing synchronously with the counterweight bucket, so that the distance between the float ball at the bottom of the buoy device and the liquid medium changes, and then the buoy force of the liquid medium on the float ball is used to push the buoy device to move towards the corresponding first signal generator, so as to trigger the corresponding first generator to generate an electric signal and transmit it to the processor, the received electric signal is processed by the processor, the tilt swinging direction of the counterweight bucket can be accurately judged, and then the judgment result is transmitted to the upper computer of the examination center, the electric signal generated by the first generator and the number of times of generating the electric signal in the whole practical operation examination process are judged, and the balance keeping effect of the counterweight bucket in the practical operation examination process of the examinee is judged and scored.

[0023] The judgment mechanism in the application further comprises a second signal generator, a third signal generator and a fourth signal generator arranged on the installation round plate, and the three signal generators are arranged uniformly in the circumferential direction together with the first signal generator and are designed to diverge in the radial direction, when the tilt angle of the counterweight bucket is small, the first generator in the corresponding direction is triggered, and as the tilt angle increases, the second signal generator, the third signal generator and the fourth signal generator are triggered in turn, and the electric signals generated by the three signal generators are fed back to the processor together; the whole judgment mechanism can receive the electric signals transmitted by different signal generators through the processor, so as to judge different tilt degrees of the counterweight bucket in the practical operation examination process, and the accuracy of detecting the swing range of the hoisted object in the crane examination process is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the application.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the bucket device in the application.

[0027] Figure 3It is the schematic diagram of the three-dimensional structure of the judging mechanism in the application;

[0028] Figure 4 It is the schematic diagram of the sectional internal structure of the judging mechanism in the application;

[0029] Figure 5 It is the schematic diagram of the planar structure of the liquid-filled cylinder, the sealing cylinder and the trigger float in the horizontal state in the application;

[0030] Figure 6 It is the schematic diagram of the planar structure of the liquid-filled cylinder, the sealing cylinder and the trigger float in the inclined state in the application;

[0031] Figure 7 It is the schematic diagram of the three-dimensional structure of the mounting plate and the processor in the application;

[0032] Figure 8 It is the schematic diagram of the sectional internal structure of the first signal generator in the application;

[0033] Figure 9 It is the schematic diagram of the enlarged structure at A in the application. Figure 4 DETAILED DESCRIPTION

[0034] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person of ordinary skill in the art without making creative labor should belong to the protection scope of the present application.

[0035] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. Figures 1 to 9 Embodiment 1

[0036] The embodiment 1 discloses a device for judging the swing amplitude of the hoisted object in the crane practical operation examination. The whole crane 1 will be described below, and the reference is made to the accompanying drawings. Figure 1 It includes the hook device 2 on the crane 1 and the bucket device 3. The bucket device 3 is hung on the hook device 2 during the crane examination, and the judging mechanism 4 is detachably installed on the upper end of the bucket device 3.

[0037] In the specific design, the reference is made to the accompanying drawings. Figure 2 ​​, the counterweight bucket body 301 is made of iron material, so that the overall quality is not less than 100 kg. A mounting circular groove 304 is opened at the center of the upper end surface of the counterweight bucket body 301, and the determination mechanism 4 can be fixedly installed on the upper end surface through the mounting circular groove 304. Then a fixed ring 302 is arranged on the upper end of the counterweight bucket body 301, and a lifting ring 303 is connected to the fixed ring 302 through a steel cable. The hook device 2 of the crane 1 is hung on the lifting ring 303, so that the counterweight bucket body 301 is lifted for subsequent practical operation examination.

[0038] Referring to the accompanying drawings Figures 3-5 The determination mechanism 4 includes a liquid-filled cylinder 5, a sealing cylinder 6, a mounting circular plate 7, a first signal generator 8, a processor 9 and a power supply (not shown in the figure). The liquid-filled cylinder 5 is concentrically installed in the mounting circular groove 304 on the upper end of the bucket device 3, and a liquid medium 501 is filled in the liquid-filled cylinder 5. The liquid medium can be water or other liquid substances with a density greater than water, and the liquid medium 501 can be added to the liquid-filled cylinder 5 at a position of half the height according to the actual situation. In addition, a liquid outlet is arranged at the center of the bottom plate of the liquid-filled cylinder 5, and a maintenance valve 502 is arranged at the lower end of the liquid outlet. By opening the maintenance valve 502, the liquid medium 501 in the interior can be discharged or additional liquid medium can be added, so as to facilitate the maintenance of the detection cylinder 5 in the later period.

[0039] The sealing cylinder 6 is sealingly connected with the upper end opening of the liquid-filled cylinder 5, and then the mounting circular plate 7 is fixedly arranged in the upper end opening of the sealing cylinder 6. Referring to the accompanying drawings Figure 7 A plurality of positioning holes 701 are uniformly arranged on the mounting circular plate 7, and then a plurality of first signal generators 8 are fixedly arranged in the positioning holes 701 one by one, and the lower end of the first signal generator 8 extends into the interior of the sealing cylinder 6. The processor 9 is arranged at the center of the upper surface of the mounting circular plate 7, and each first signal generator 8 is connected to the corresponding interface of the processor 9 through a wire. Then the processor 9 and the first signal generator 8 are powered by a power supply. The processor 9 can receive the electrical signal generated by the first signal generator 8, and after processing, the processor 9 can feed back the electrical signal to the upper computer of the examination center through the built-in wireless transmission module.

[0040] A through hole is arranged on the bottom plate of the sealing cylinder 6, which is aligned with each first signal generator 8. Then a trigger float 10 is arranged in each through hole which slides up and down. The specific trigger float 10 is shown in the accompanying drawings Figure 4 , the accompanying drawings Figure 8 and the accompanying drawings Figure 9The trigger float 10 comprises a sliding rod 101 which interacts with the through hole, a float ball 102 connected to the lower end of the sliding rod 101, and a first trigger ball head 103 connected to the upper end of the sliding rod 101. The float ball 102 is immersed in the liquid medium 501 in the liquid cylinder 5 and moves up and down under the action of the buoyancy, and the first trigger ball head 103 can trigger the first signal generator 8 to generate an electric signal after moving upward by a distance.

[0041] In addition, limit plates 104 are arranged at both upper and lower ends of the sliding rod 101, the upper limit plate is located above the bottom plate of the sealing cylinder 6, and the lower limit plate is located below the bottom plate of the sealing cylinder 6. Then, a reset spring 105 is sleeved on the sliding rod 101, and the two ends of the reset spring 105 are connected to the bottom plate of the sealing cylinder 6 and the upper or lower limit plate 104, respectively. When the trigger float 10 is in a natural state, the reset spring 105 exerts a downward pressure on the sliding rod 101, so that the upper limit plate 104 abuts against the upper end surface of the bottom plate of the sealing cylinder 6, thereby elastically limiting the entire trigger float 10 and avoiding the up-and-down movement of the trigger float 10. When the float ball 102 moves up and down under the action of the buoyancy of the liquid medium 501, the reset spring 105 provides elastic damping for the float ball 102, ensures the stable movement of the trigger float 10, and reduces the influence of slight fluctuations in the liquid level of the liquid medium 501. The elastic damping force generated by the reset spring 105 is low and does not affect the normal triggering of the trigger float 10.

[0042] Reference is made to the accompanying drawings Figure 8 The first signal generator 8 comprises a shell 801 and a signal generator device 802. The shell 801 is fixedly arranged in the positioning hole 701 on the mounting plate 7, and the signal generator device 802 is fixedly arranged at the upper end of the shell 801. The lower end of the shell 801 is open, and a large chamfer 800 is arranged on the lower end opening of the shell 801 to facilitate the insertion of the first trigger ball head 103.

[0043] In the specific design, the signal generator device 802 in the embodiment 1 has two schemes: the first scheme is to select an inductive proximity switch, and the first trigger ball head 103 is made of metal material. When the first trigger ball head 103 is inserted into the shell 801, a corresponding magnetic field eddy current is generated, the impedance of the inductive proximity switch changes, and then the oscillation circuit detects the impedance change to generate an electric signal. The second scheme is to select a contact micro switch, and the first trigger ball head 103 is made of conductive material. Reference is made to the accompanying drawings Figure 8It includes a contact micro switch body, and second conductive ball heads 805 are connected to both sides of the lower end of the contact micro switch body through elastic members 804. In the specific design, the first trigger ball head 103 and the second conductive ball head 805 are preferably made of graphite material, so that they have good conductive properties and good lubrication effect, avoiding the situation where the first trigger ball head 103 is stuck between the second conductive ball heads 805 on both sides and cannot be moved down and reset.

[0044] The method of using and the working principle of the device for judging the swing amplitude of a suspended object in the crane practical operation test in this embodiment 1 are as follows:

[0045] The determination mechanism 4 is mounted on top of the bucket device 3, and the hook device 2 on the crane 1 is connected to the lifting ring 303. The operator then operates the crane 1 to lift, move, turn, and lower the bucket device 3. During the above process, improper operation (such as excessive acceleration or deceleration) may cause the bucket device 3 to swing and tilt to one side, causing the determination mechanism 4 to swing and tilt synchronously with the bucket device 3. At this time, the liquid medium 501 inside the liquid cylinder 5 always remains horizontal, causing the liquid medium 501 to gather at the tilted end (see attached figure). Figure 6 ), and then under the action of buoyancy, the trigger buoy 10 in the corresponding direction moves upward, so that the first trigger ball head 103 at the upper end of the trigger buoy 10 enters the first signal generator 8 to generate an electrical signal and feed it back to the processor 9. Then the processor 9 can determine in which direction the bucket device 3 swings and tilts during the practical test according to the first generator 8 that generates the electrical signal, and wirelessly transmit this information to the host computer of the test center, which is recorded by the host computer. Finally, after the test is over, the test can be judged and scored by receiving the electrical signal and the number of times it occurs. Example 2

[0046] Example 2 discloses a device for judging the swing amplitude of suspended objects in a crane practical operation test, which is further optimized based on the technical solution in Example 1. The similarities with Example 1 will not be described again.

[0047] In this embodiment 2, four groups of positioning holes 701 are opened on the mounting circular plate 7 and are evenly arranged in the circumferential direction. Then, multiple first signal generators 8 are installed in the outermost group of positioning holes 701. Then, the second signal generator 11, the third signal generator 12, and the fourth signal generator 13 are installed in the three groups of positioning holes 701 inside the first signal generator 8 from the outside to the inside. Therefore, the multiple fourth signal generators 13, the third signal generator 12, the second signal generator 11, and the first signal generator 8 are all evenly arranged in the circumferential direction on the mounting circular plate 7, and are distributed divergently from the inside to the outside.

[0048] The first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13 in this embodiment 2 are also electrically connected to the corresponding interfaces on the processor 9 through wires, and each of the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13 is provided with a trigger float 10 on the bottom plate of the sealed cylinder 6 directly below the trigger float 10 for triggering the generation of an electrical signal. Finally, it should be noted that the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13 in this embodiment 2 are the same in structure and are different in that each of the four can emit a corresponding electrical signal, which can then be received and processed by the processor 704.

[0049] The improved design of the determination mechanism 4 in this embodiment 2 can trigger the first signal generator 8 when the swinging and tilting amplitude of the bucket device 3 is small during the actual operation examination, and the second signal generator 11, the third signal generator 12 and the fourth signal generator 13 will also generate electrical signals in turn as the swinging and tilting amplitude of the bucket device 3 increases. Therefore, the processor 9 can more accurately determine the swinging and tilting amplitude of the bucket device 3 by determining whether the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13 generate electrical signals.

[0050] Suppose that during the examination, four tilting critical points are set in the same tilting direction, and the critical tilting angles are set to 10°, 20°, 30° and 40° (only for example and convenient description, not representing the actual examination standard). When the bucket device 3 swings and tilts by no more than 10°, the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13 do not generate electrical signals; when the tilting angle of the bucket device 3 is between 10° and 20°, the outermost first signal generator 8 generates an electrical signal and feeds back to the processor 9; when the tilting angle of the bucket device 3 is between 20° and 30°, the first signal generator 8 and the second signal generator 11 both generate electrical signals and feed back to the processor; when the tilting angle of the bucket device 3 is between 30° and 40°, the first signal generator 8, the second signal generator 11 and the third signal generator 12 all generate electrical signals and feed back to the processor; and when the tilting angle of the bucket device 3 is greater than or equal to 40°, the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13 all generate electrical signals and feed back to the processor.

[0051] The electrical signals generated by the first signal generator 8, the second signal generator 11, the third signal generator 12, and the fourth signal generator 13 are divided into four ascending priority levels. At any point during the test, the tilt angle of the bucket device 3 can be determined by analyzing the triggering status of the first signal generator 8, the second signal generator 11, the third signal generator 12, and the fourth signal generator 13 at that point in time. If no signal is present at that point in time, it indicates that the bucket device 3 is tilted no more than 10°. If multiple signals are present simultaneously, the signal with the highest priority is used as the basis for determining the tilt angle of the bucket device 3. For example, if the three signals generated by the first signal generator 8, the second signal generator 11, and the third signal generator 12 are present at the same time, only the signal generated by the third signal generator 12, with the highest priority, needs to be identified to determine that the tilt angle of the bucket device 3 is between 30° and 40°, without considering the other lower-priority signals. This results in a simple and reliable determination algorithm and a rapid detection response.

[0052] Therefore, the processor 9 can accurately determine the swing and tilt amplitude of the bucket device 3 during the practical test by detecting the electrical signals generated by the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13, and can score the examinee's operation based on this. Example 3

[0053] Example 3 discloses a crane practical operation test judgment method using the device for judging the swing amplitude of a suspended object in the crane practical operation test in Example 1 or Example 2, comprising the following steps:

[0054] The first step is to fix the judgment mechanism 4 on the upper end of the bucket device 3 and power it on for debugging. After the debugging is completed, wait for the candidates to take the practical test.

[0055] In the second step, during the practical test, the candidate first connects the bucket device 3 to the hook device 2 on the crane 1, and then performs the corresponding lifting, moving, turning and lowering steps on the bucket device 3 according to the test requirements.

[0056] Third step, in the process of the examination, when the examinee operates properly, the bucket device 3 will not swing or swing slightly, at this time the processor 9 in the judging mechanism 4 will not receive the electric signal generated by the first signal generator 8 or the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13; when the examination operation is improper, the bucket device 3 will produce a larger swing, and when the swing amplitude of the bucket device 3 is large, the judging mechanism 4 will produce the same swing amplitude with the bucket device 3, at this time the liquid medium 501 contained in the liquid cylinder 5 will gather to one side, so that the corresponding trigger buoy 10 is lifted by the buoyancy, and then the first trigger ball head 103 triggers the first signal generator 8 or the first signal generator 8, the second signal generator 11, the third signal generator 12 and the fourth signal generator 13, so that it generates an electric signal and feeds back to the processor 9, and then the processor 9 wirelessly transmits the information to the upper computer of the examination center.

[0057] Fourth step, after the examination is completed, the upper computer will judge and score according to the received electric signal and the number of times it occurs, and then combine other requirements in the practical operation examination process to comprehensively judge whether the examination is qualified.

[0058] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for judging the swing amplitude of a suspended object in a crane practical operation test, comprising a bucket device connected to a hook device on a crane, characterized in that: A determination mechanism is installed at the upper end of the bucket device, and the determination mechanism is connected to the host computer of the examination center through a wireless transmission module; The determination mechanism includes a liquid-filled cylinder, a sealing cylinder, a first signal generator, a processor, and a power supply. The liquid-filled cylinder is connected to the upper end of the bucket device and contains a liquid medium. The sealing cylinder is sealed and connected to the upper end of the liquid-filled cylinder. A mounting circular plate is provided on the upper end of the sealing cylinder. A plurality of first signal generators are evenly arranged on the mounting circular plate in a circumferential direction. The processor is arranged at the center of the mounting circular plate, and the first signal generator is connected to the processor via a wire. The sealing cylinder is provided with a trigger buoy aligned vertically with each first signal generator, the trigger buoy comprising a slide rod provided vertically through the bottom plate of the sealing cylinder, the lower end of the slide rod being connected to a float ball subjected to the buoyancy of the liquid medium, and the upper end of the slide rod being connected to a first trigger ball head for triggering the first signal generator; The determination mechanism further includes a second signal generator, a third signal generator, and a fourth signal generator electrically connected to the processor via wires. A plurality of the fourth signal generator, the third signal generator, the second signal generator, and the first signal generator are uniformly arranged circumferentially on the mounting circular plate and distributed sequentially from the inside to the outside. A trigger buoy is provided in the sealed cylinder directly below each of the second signal generator, the third signal generator, and the fourth signal generator. The first signal generator, the second signal generator, the third signal generator and the fourth signal generator are configured in the same structure, and each comprises an outer shell and a signal generator device, wherein the outer shell is fixedly disposed in a positioning hole on the mounting circular plate, the signal generator device is fixedly mounted on the upper end of the outer shell, and the lower end opening of the outer shell is configured to receive a first trigger ball head; Both sides of the lower end of the signal generator device are connected to the second conductive ball heads through elastic members. After the first trigger ball head extends into the outer shell, it contacts the second conductive ball heads on both sides at the same time.

2. The device for judging the swing amplitude of a suspended object in a crane practical operation test according to claim 1, characterized in that: The signal generator device is an inductive proximity switch, and the first trigger ball head is made of metal.

3. The device for judging the swing amplitude of a suspended object in a crane practical operation test according to claim 1, characterized in that: The signal generator device is a contact micro switch, and the first trigger ball head is made of conductive material.

4. The device for judging the swing amplitude of a suspended object in a crane practical operation test according to claim 1, characterized in that: Limit plates are provided at the upper and lower ends of the sliding rod. The upper limit plate is located above the bottom plate of the sealing cylinder, and the lower limit plate is located below the bottom plate of the sealing cylinder. A return spring is provided on the sliding rod, and the two ends of the return spring are respectively connected to the bottom plate of the sealing cylinder, the upper or lower limit plate.

5. The device for judging the swing amplitude of a suspended object in a crane practical operation test according to claim 1, characterized in that: A liquid discharge port is provided at the center of the bottom plate of the liquid-filled cylinder, and a maintenance valve is provided at the lower end of the liquid discharge port.

6. The device for judging the swing amplitude of a suspended object in a crane practical operation test according to claim 1, characterized in that: The bucket device includes a counterweight barrel body, an upper end of the counterweight barrel body is provided with an installation circular groove for installing the judgment mechanism, the upper end of the counterweight barrel body is fixedly connected to a fixing ring, and the fixing ring is connected to a lifting ring through a steel cable.

7. A judgment method using the device for judging the swing amplitude of a suspended object in a crane practical operation test according to any one of claims 1 to 6, characterized in that: The steps include: The judgment mechanism is fixedly installed on the upper end of the bucket device and powered on for debugging. After the debugging is completed, the candidates can take the practical test; During the practical test, candidates first connect the bucket device to the hook device on the crane, and then perform lifting, walking, turning and lowering operations according to the test requirements; During the walking process, if the examinee operates properly, the bucket device will not swing or will swing slightly, and the processor in the judgment mechanism will not receive any electrical signals. However, if the examinee operates improperly, the entire bucket device will swing greatly along with the judgment mechanism, causing the liquid medium contained in the liquid cylinder to gather to one side and remain horizontal, thereby causing the trigger buoy on the corresponding side to move upward due to the buoyancy. Then, the first trigger ball head will trigger the first signal generator, causing it to generate an electrical signal and feed it back to the processor, which will then wirelessly transmit the information to the host computer at the examination center. (4) After the test is completed, the upper computer will judge and score based on the received electrical signals and the number of times the electrical signals are generated, and then comprehensively judge whether the test is passed based on other requirements during the candidate's practical test.

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