Windproof method and system for crane and crane

Abstract

The invention discloses a windproof method and system for a crane and the crane, and the windproof method comprises the following steps: controlling the crane to decelerate and stop when the crane is in a walking state and the walking overspeed occurs; when the crane is in the parking state and the wind prevention mode is not selected, whether the crane is in an abnormal displacement state or not is judged according to the displacement amount and the displacement threshold value of the crane, and the wind prevention device is controlled to act when the crane is in the abnormal displacement state; when the crane is in the parking state and the wind prevention mode is selected, adhesive force and horizontal thrust are calculated, whether the crane is about to be in the abnormal displacement state or not is judged according to the adhesive force and the horizontal thrust, and the wind prevention device is controlled to act when the crane is about to be in the abnormal displacement state. Reliability and safety of operation of the crane are improved through preventive protection, the crane can be controlled to slow down and stop in time when abnormal displacement or overspeed walking of the crane is caused by sudden gust, the crane is prevented from being out of control, and safety of the crane is protected.

Description

Technical Field

[0001] This invention belongs to the field of crane technology, and particularly relates to a crane wind protection method, system and crane. Background Technology

[0002] Crane wind protection systems typically include wind protection devices, a main control unit, a travel sampling unit, a displacement sampling unit, and a wind speed sampling unit. The main control unit uses these sampling units to determine the crane's status in real time, automatically calculating data such as the crane's operating speed, wheel direction and angle, and gust wind speed and direction. When a sudden gust of wind causes abnormal wheel rolling, the system can automatically detect and intelligently identify the problem, and simultaneously automatically control the wind protection devices to perform wind protection operations on the crane, effectively ensuring crane safety.

[0003] While existing crane wind protection systems can effectively control wind-resistant devices, they only address wind protection after a sudden gust of wind causes abnormal wheel rolling. They cannot provide preventative protection before a sudden gust of wind blows. Furthermore, when the crane is traveling with the wind at its back and encounters a sudden gust of wind causing it to travel at excessive speed, existing crane wind protection systems cannot provide corresponding alarm or protection functions, thus limiting the system's safety and reliability.

[0004] Existing crane windproof systems use a reference position calibration (i.e., zero-position calibration) based on whether the crane is in an inertial displacement state when detecting crane operation. This calibration method has low accuracy and affects the measurement accuracy of wheel displacement. Summary of the Invention

[0005] The purpose of this invention is to provide a method, system, and crane for wind protection, in order to solve the problem that existing systems cannot take preventive protective measures in advance, and the problem that they cannot provide alarm or protection functions when the crane is traveling in a downwind condition and encounters a sudden gust of wind that causes it to travel at excessive speed.

[0006] This invention solves the above-mentioned technical problems through the following technical solution: a method for wind protection of cranes, comprising:

[0007] When the crane is traveling and speed exceeds the limit, control the crane to slow down and stop.

[0008] When the crane is in the parking state and the wind prevention mode is not selected, the displacement of the crane is obtained, and the crane is judged to be in an abnormal displacement state based on the displacement of the crane and the displacement threshold. When the crane is in an abnormal displacement state, the wind prevention device is controlled to perform wind prevention operation on the crane.

[0009] When the crane is in the parking state and the wind prevention mode is selected, the adhesion between the crane wheels and the rails and the horizontal thrust generated by the crane under wind load are calculated. Based on the adhesion and the horizontal thrust, it is determined whether the crane is about to be in an abnormal displacement state. When the crane is about to be in an abnormal displacement state, the wind prevention device is controlled to perform wind prevention operation on the crane.

[0010] Furthermore, when the crane is in a traveling state and overspeed occurs, the crane is controlled to decelerate and stop, specifically including:

[0011] When the crane is in a traveling state and exceeds the traveling speed, it sends an overspeed alarm signal to the crane control module, which then controls the crane to decelerate and stop based on the overspeed alarm signal.

[0012] Alternatively, when the crane is traveling and overspeed occurs, the windproof device can be controlled to perform windproof operation on the crane, causing it to slow down and stop.

[0013] Furthermore, determining whether the crane is about to be in an abnormal displacement state based on the adhesive force and the horizontal thrust specifically includes:

[0014] A safety threshold is set based on the adhesion force;

[0015] If the horizontal thrust is greater than or equal to the safety threshold, the crane will be in an abnormal displacement state.

[0016] If the horizontal thrust is less than the safety threshold, the displacement of the crane is further obtained, and the crane is further judged as to whether it is in an abnormal displacement state based on the displacement of the crane and the displacement threshold.

[0017] Furthermore, the crane is determined to be in a traveling or parked state based on the traveling commands collected by the traveling sampling unit.

[0018] Furthermore, when the crane is in a parked state, the windproof method also includes zero-position calibration, the specific calibration process of which includes:

[0019] When the crane is not in a state of inertial displacement, the current position is calibrated as the initial zero position; when the crane is in a state of inertial displacement and a reverse signal is detected, the current position is calibrated as the initial zero position.

[0020] Detect the peak offset in different offset directions during each round of offset;

[0021] Accurate zero-position calibration is performed based on the offset peak values ​​in different offset directions during multiple consecutive offset processes.

[0022] Further, the offset direction includes a first offset direction and a second offset direction, wherein the first offset direction is opposite to the second offset direction; precise zero-position calibration is performed based on the offset peak values ​​of different offset directions during multiple consecutive offset processes, specifically including:

[0023] Calculate the first average of the peak values ​​of the offsets in the first offset direction and the second offset direction during each round of offset;

[0024] Calculate the mean of all first averages, and use that mean as the final zero.

[0025] Based on the same concept, the present invention also provides a crane windproof system, including a windproof device and a windproof control unit, wherein the windproof control unit includes:

[0026] The travel sampling unit is used to monitor the travel commands of the crane;

[0027] Displacement sampling unit is used to monitor the position status of the crane;

[0028] Wind speed sampling unit, used to monitor wind speed and direction;

[0029] The mode selection unit is used to generate a wind prevention mode selection signal;

[0030] and a main control unit, the main control unit being used for:

[0031] The system determines whether the crane is in a traveling or parked state based on the traveling command monitored by the traveling sampling unit; it calculates the crane's displacement and speed based on the position status monitored by the displacement sampling unit, and determines whether the crane has overspeeded based on the crane's speed; and it determines whether to select the anti-wind mode based on the anti-wind mode selection signal generated by the mode selection unit.

[0032] When the crane is traveling and speed exceeds the limit, control the crane to slow down and stop.

[0033] When the crane is in the parking state and the wind prevention mode is not selected, the system determines whether the crane is in an abnormal displacement state based on the crane's displacement amount and displacement threshold, and controls the wind prevention device to perform wind prevention operation on the crane when it is in an abnormal displacement state.

[0034] When the crane is in the parking state and the wind prevention mode is selected, the adhesion between the crane wheels and the rails and the horizontal thrust generated by the crane under wind load are calculated. Based on the adhesion and the horizontal thrust, it is determined whether the crane is about to be in an abnormal displacement state. When the crane is about to be in an abnormal displacement state, the wind prevention device is controlled to perform wind prevention operation on the crane.

[0035] Furthermore, the main control unit is also used to perform zero-position calibration when the crane is in a parked state, specifically for:

[0036] The position status monitored by the displacement sampling unit is used to determine whether the crane is in an inertial displacement state;

[0037] When the crane is not in a state of inertial displacement, the current position is calibrated as the initial zero position; when the crane is in a state of inertial displacement and a reverse signal is detected, the current position is calibrated as the initial zero position.

[0038] Detect the peak offset in different offset directions during each round of offset;

[0039] Accurate zero-position calibration is performed based on the offset peak values ​​in different offset directions during multiple offset processes.

[0040] Based on the same concept, the present invention also provides a crane, the crane including the crane windproof system described above.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] This invention promptly controls the crane to decelerate and stop when it travels at excessive speed, preventing the crane from going out of control and protecting its safety. This improves safety and reliability and solves the problem that existing systems cannot provide corresponding alarm or protection functions when the crane is traveling in a downwind condition or encounters a sudden gust of wind that causes it to travel at excessive speed.

[0043] This invention adds a wind prevention mode selection function. In the absence of wind prevention mode, it directly determines whether the crane is in an abnormal displacement state based on the amount of crane displacement, and then controls the wind prevention device to operate. In the wind prevention mode, it determines whether the crane is about to be in an abnormal displacement state based on the adhesion force and horizontal thrust, and then controls the wind prevention device to operate. Through preventive protection, the reliability and safety of crane operation are further improved.

[0044] The zero-position calibration of this invention includes preliminary calibration and precise calibration. Preliminary calibration quickly determines the initial zero position, ensuring that the system can respond quickly. Precise zero-position calibration is performed by detecting the offset peak during multiple offset processes, which improves the accuracy of zero-position calibration, thereby improving the measurement accuracy of wheel displacement, reducing misjudgments, and enhancing the reliability and stability of the system. Attached Figure Description

[0045] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a flowchart of the crane windproofing method in an embodiment of the present invention;

[0047] Figure 2 This is a flowchart of the zero-position calibration in an embodiment of the present invention;

[0048] Figure 3 This is a structural block diagram of the crane wind protection system in an embodiment of the present invention. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0051] Example 1

[0052] To address the issue that existing systems only provide wind protection for cranes after sudden gusts of wind cause abnormal wheel rolling, failing to take preventative protective measures before the crane is about to be blown by a sudden gust of wind, this invention provides a crane wind protection method. This method adds a wind protection mode selection function. Without selecting wind protection mode, the system directly determines whether the crane is in an abnormal displacement state based on the amount of displacement. With wind protection mode selected, the system determines whether the crane is about to enter an abnormal displacement state based on adhesion and horizontal thrust. When the crane is in an abnormal displacement state or about to enter an abnormal displacement state, the system controls the wind protection device to perform wind protection operations on the crane. This preventative protection improves the reliability and safety of crane operation.

[0053] like Figure 1 As shown, the crane wind protection method provided in this embodiment of the invention includes the following steps:

[0054] Step 1: Obtain the crane's travel command monitored by the travel sampling unit;

[0055] Step 2: Determine whether the crane is in a traveling or parked state based on the crane's travel command. If the crane is in a traveling state, obtain the position status of the crane monitored by the displacement sampling unit and proceed to Step 3; if the crane is in a parked state, proceed to Step 5.

[0056] Step 3: Calculate the crane's displacement and speed based on the position status monitored by the displacement sampling unit;

[0057] Step 4: Determine whether the crane is traveling too fast based on its speed. If no overspeed is detected, proceed to Step 1; if overspeed is detected, proceed to Step 9.

[0058] Step 5: Determine whether to select the wind prevention mode based on the wind prevention mode selection signal. If the wind prevention mode is not selected, proceed to step 6; if the wind prevention mode is selected, proceed to step 7.

[0059] Step 6: Determine whether the crane is in an abnormal displacement state based on the crane's displacement amount and displacement threshold. If the crane is in an abnormal displacement state, proceed to step 9; if the crane is not in an abnormal displacement state, proceed to step 5.

[0060] Step 7: Calculate the adhesion between the crane wheels and the rails, as well as the horizontal thrust generated by the crane under wind load;

[0061] Step 8: Determine whether the crane is about to be in an abnormal displacement state based on the adhesion and horizontal thrust. If the crane is about to be in an abnormal displacement state, proceed to step 9; if the crane is not about to be in an abnormal displacement state, proceed to step 6.

[0062] Step 9: Control the windproof device to perform windproof operation on the crane.

[0063] In step 1, the crane's travel commands include left-moving commands and right-moving commands. Under a left-moving command, the crane moves to the left; under a right-moving command, the crane moves to the right; when there are no left or right-moving commands, the crane stops moving, i.e., it is in a parking state.

[0064] This invention monitors the crane's travel speed in real time through a displacement sampling unit during the crane's movement. When encountering a sudden gust of wind in the same direction as the travel direction (i.e., a tailwind) that causes the crane to overspeed (i.e., the travel speed is greater than the speed threshold), the main control unit controls the crane to decelerate and stop to prevent speed loss and protect the crane's safety. When no overspeed occurs (i.e., the travel speed is less than or equal to the speed threshold), the crane's travel status and overspeed judgment are continuously monitored.

[0065] In a specific embodiment of the present invention, when the crane is in a traveling state and travels at excessive speed, the main control unit controls the crane to decelerate and stop in two ways: the first way is for the main control unit to send an overspeed alarm signal to the crane control module, so that the crane control module controls the traveling mechanism to actively decelerate and stop according to the overspeed alarm signal; the second way is for the main control unit to directly control the windproof device to perform windproof operation on the crane, so that the crane decelerates and stops.

[0066] When the crane is in the parked state, the main control unit immediately determines whether a wind prevention mode selection signal has been generated, and then determines whether to select the wind prevention mode. In a specific embodiment of the present invention, the wind prevention mode selection signal can be generated by adding a mode selection button. For example, pressing the mode selection button generates a wind prevention mode selection signal, selecting the wind prevention mode; not pressing the mode selection button does not generate a wind prevention mode selection signal, and the wind prevention mode is not selected. Alternatively, the wind prevention mode selection signal can be generated through the main control unit's display screen.

[0067] In a specific embodiment of the present invention, when the crane is in a parked state and the wind prevention mode is selected, the main control unit automatically calculates the adhesion force between the crane wheels and the track based on structural parameters such as the crane's weight, windward area, and track slope; and calculates the horizontal thrust generated by the crane under wind load based on the wind speed and direction monitored in real time by the wind speed sampling unit, combined with the aforementioned structural parameters of the crane. In this embodiment, the adhesion force is frictional resistance, and the horizontal thrust is wind load. The calculation of frictional resistance and wind load is existing technology and can be found in standard GB / T3811-2008 "Crane Design Code". The wind prevention mode solves the problem that existing systems cannot take preventive protective measures in advance.

[0068] In a specific embodiment of the present invention, determining whether a crane is about to be in an abnormal displacement state based on adhesion and horizontal thrust specifically includes:

[0069] Step 8.1: Set a safety threshold based on adhesion.

[0070] When the horizontal thrust is greater than the adhesive force, the crane will be abnormally displaced by the wind load, i.e. it will be blown away by the wind. In order to take preventive protection measures in advance, a safety threshold that is smaller than the adhesive force and has a certain safety margin is set, for example, the safety threshold is 85% of the adhesive force.

[0071] Step 8.2: Determine whether the crane is about to be in an abnormal displacement state based on the horizontal thrust and the safety threshold. If the horizontal thrust is greater than or equal to the safety threshold, it indicates that the horizontal thrust will cause the crane to be in an abnormal displacement state. Immediately control the windproof device to perform windproof operation on the crane, forcing the crane to slow down and stop, and preventing accidents from happening.

[0072] If the horizontal thrust is less than the safety threshold, it indicates that the horizontal thrust will not cause abnormal displacement of the crane, and the crane is not in an abnormal displacement state. To avoid safety risks caused by wind speed detection failures or measurement errors, and to provide redundant protection for the safe operation of the crane, this invention, after determining that the crane is not about to be in an abnormal displacement state based on the horizontal thrust and the safety threshold, proceeds to step 6, further determining whether the crane is in an abnormal displacement state based on the crane's displacement amount, i.e., obtaining the crane's displacement amount and determining whether the crane is in an abnormal displacement state based on the crane's displacement amount and the displacement threshold. When the crane's displacement amount is greater than the displacement threshold, the crane is determined to be in an abnormal displacement state.

[0073] Each time the main control unit detects a stop command from the crane in the travel sampling unit, it immediately triggers zero-position calibration. For example... Figure 2 As shown, the specific process of zero-position calibration includes:

[0074] Step A1: Obtain the position status of the crane monitored by the displacement sampling unit;

[0075] Step A2: Determine whether the crane is in an inertial displacement state based on the position status of the crane monitored by the displacement sampling unit; if the crane is not in an inertial displacement state, that is, there is no displacement, then mark the current position as the initial zero position.

[0076] If the crane is in an inertial displacement state, that is, there is displacement, then the displacement reverse judgment is performed. Once the reverse signal is detected, the main control unit immediately calibrates the current position as the initial zero position.

[0077] Step A3: Detect the peak offset in different offset directions during each round of offsetting;

[0078] Step A4: Accurately calibrate the zero position based on the offset peak values ​​in different offset directions during multiple consecutive offset processes.

[0079] Due to inertia, when the crane is in the parked state, the movement of the crane's mechanism will cause its wheels to move back and forth on the track, resulting in inertial displacement. If displacement is detected, it indicates that the crane is in a state of inertial displacement. To avoid missing detections, if no displacement is detected, a delay can be made to check for displacement again. If there is still no displacement, the current position is marked as the initial zero position; if there is displacement, a reverse displacement detection is performed. Once a reverse signal is detected, the main control unit immediately marks the current position as the initial zero position.

[0080] In step A3, the offset direction includes a first offset direction and a second offset direction, with the first offset direction being opposite to the second offset direction. One round of offset process refers to the crane making one round trip in the first and second offset directions, that is, the crane offsets from the initial zero position towards the first offset direction, then returns to the initial zero position, then offsets towards the second offset direction, and finally returns to the initial zero position. During each round of offset process, the offset peak value in the first offset direction and the offset peak value in the second offset direction can be obtained through the displacement sampling unit. The offset peak value refers to the maximum offset amount. For example, the first offset direction is left and the second offset direction is right, that is, the maximum left offset amount (i.e., the maximum offset amount in the left offset process) and the maximum right offset amount (i.e., the maximum offset amount in the right offset process) can be obtained through the displacement sampling unit during each round of offset process.

[0081] In a specific embodiment of the present invention, precise zero-position calibration is performed based on the offset peak values ​​in different offset directions during multiple consecutive offset processes, specifically including:

[0082] Step A4.1: Calculate the first average value of the peak values ​​of the first offset direction and the second offset direction during each round of offset;

[0083] Step A4.2: Calculate the mean of all first means, and use this mean as the final zero.

[0084] After detecting the offset peak values ​​of the first and second offset directions during each round of offset, the average value of the offset peak values ​​in the first and second offset directions is calculated (i.e., the first average value; if the offset peak value in the first offset direction is positive, then the offset peak value in the second offset direction is negative). Each round of offset corresponds to a first average value. The average value of the first average values ​​of multiple consecutive rounds of offset is calculated, and this average value is used as the final zero point to achieve precise zero-point calibration.

[0085] Specifically, the maximum left offset and maximum right offset during the i-th round of offset are detected and stored; the average of the maximum left offset and maximum right offset is calculated to obtain the first average value during the i-th round of offset; if i reaches the round threshold N, the average of N first average values ​​is calculated, and this average value is used as the final zero point. In this embodiment, N is set to 3.

[0086] To avoid the low accuracy of traditional zero-position calibration methods, this invention divides zero-position calibration into initial calibration and precise calibration. First, initial zero-position calibration is performed based on whether the crane is in an inertial displacement state, quickly determining the initial zero position and providing a criterion for the system to monitor displacement, ensuring rapid system response and safety. After initial zero-position calibration, the average displacement during each wheel's back-and-forth movement (i.e., the first average value) is calculated by monitoring the direction and displacement of the wheels. Then, the mean of the average displacement during multiple wheel movements is calculated to correct the error of the initial calibration, further improving the measurement accuracy of the crane's displacement, reducing misjudgments, and enhancing the reliability and stability of the system.

[0087] Example 2

[0088] like Figure 3 As shown, the crane windproof system provided in this embodiment of the invention includes a windproof device and a windproof control unit. The windproof control unit includes a main control unit, and a travel sampling unit, a displacement sampling unit, a wind speed sampling unit, and a mode selection unit connected to the main control unit. The windproof device is used to brake the crane wheels to prevent the crane (e.g., a gantry crane) from shifting.

[0089] The travel sampling unit monitors the crane's travel commands; the displacement sampling unit monitors the crane's position status; the wind speed sampling unit monitors wind speed and direction; and the mode selection unit generates a wind prevention mode selection signal. In this embodiment, the displacement sampling unit is an encoder, which can measure both displacement and direction, and the wind speed sampling unit is an anemometer.

[0090] The main control unit is used for:

[0091] The system determines whether the crane is in a traveling or parked state based on the traveling command monitored by the traveling sampling unit; it calculates the crane's displacement and speed based on the position status monitored by the displacement sampling unit, and determines whether the crane has overspeeded based on the crane's speed; and it determines whether to select the anti-wind mode based on the anti-wind mode selection signal generated by the mode selection unit.

[0092] When the crane is traveling and speed exceeds the limit, control the crane to slow down and stop.

[0093] When the crane is in the parking state and the wind prevention mode is not selected, the system determines whether the crane is in an abnormal displacement state based on the crane's displacement amount and displacement threshold, and controls the wind prevention device to perform wind prevention operation on the crane when it is in an abnormal displacement state.

[0094] When the crane is in the parking state and the wind prevention mode is selected, the adhesion between the crane wheels and the rails and the horizontal thrust generated by the crane under wind load are calculated. Based on the adhesion and horizontal thrust, it is determined whether the crane is about to be in an abnormal displacement state, and when the crane is about to be in an abnormal displacement state, the wind prevention device is controlled to perform wind prevention operation on the crane.

[0095] In a specific embodiment of the present invention, the main control unit is used to determine whether the crane is about to be in an abnormal displacement state based on the adhesion force and horizontal thrust, specifically including:

[0096] Set a safety threshold based on adhesion;

[0097] The system determines whether the crane is about to enter an abnormal displacement state based on the horizontal thrust and a safety threshold. If the horizontal thrust is greater than or equal to the safety threshold, it indicates that the horizontal thrust will cause the crane to undergo abnormal displacement, and the crane is about to enter an abnormal displacement state. The system immediately controls the windproof device to perform windproofing operations on the crane, forcing it to slow down and stop, preventing accidents. If the horizontal thrust is less than the safety threshold, it indicates that the horizontal thrust will not cause the crane to undergo abnormal displacement, and the crane is not about to enter an abnormal displacement state. To avoid safety risks caused by wind speed detection failures or measurement errors, and to provide redundant protection for the safe operation of the crane, this invention, when the main control unit determines that the crane is not about to enter an abnormal displacement state based on the horizontal thrust and the safety threshold, further determines whether the crane is in an abnormal displacement state based on the amount of crane displacement. That is, it obtains the amount of crane displacement and determines whether the crane is in an abnormal displacement state based on the amount of crane displacement and the displacement threshold. When the amount of crane displacement is greater than the displacement threshold, the crane is determined to be in an abnormal displacement state.

[0098] In a specific embodiment of the present invention, the main control unit immediately triggers zero-position calibration each time the traveling sampling unit detects a stop travel command from the crane. The main control unit performs zero-position calibration when the crane is in a parked state, specifically including:

[0099] The position status monitored by the displacement sampling unit is used to determine whether the crane is in an inertial displacement state;

[0100] When the crane is not in a state of inertial displacement, the current position is calibrated as the initial zero position; when the crane is in a state of inertial displacement and a reverse signal is detected, the current position is calibrated as the initial zero position.

[0101] Detect the peak offset in different offset directions during each round of offset;

[0102] Accurate zero-position calibration is performed based on the offset peak values ​​in different offset directions during multiple offset processes.

[0103] In some specific embodiments of the present invention, the crane windproof system may combine any feature of the crane windproof method in Embodiment 1 of the present invention, and vice versa, which will not be elaborated here.

[0104] The above description only discloses specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or modifications that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for wind protection of a crane, characterized in that, The windproofing method includes: When the crane is traveling and speed exceeds the limit, control the crane to slow down and stop. When the crane is in the parking state and the wind prevention mode is not selected, the displacement of the crane is obtained, and the crane is judged to be in an abnormal displacement state based on the displacement of the crane and the displacement threshold. When the crane is in an abnormal displacement state, the wind prevention device is controlled to perform wind prevention operation on the crane. When the crane is in the parking state and the wind prevention mode is selected, the adhesion between the crane wheels and the rails and the horizontal thrust generated by the crane under wind load are calculated. Based on the adhesion and the horizontal thrust, it is determined whether the crane is about to be in an abnormal displacement state. When the crane is about to be in an abnormal displacement state, the wind prevention device is controlled to perform wind prevention operation on the crane.

2. The crane windproofing method according to claim 1, characterized in that, When the crane is traveling and speed exceeds the limit, the crane will be controlled to decelerate and stop. Specifically, this includes: When the crane is in a traveling state and exceeds the traveling speed, it sends an overspeed alarm signal to the crane control module, which then controls the crane to decelerate and stop based on the overspeed alarm signal. Alternatively, when the crane is traveling and overspeed occurs, the windproof device can be controlled to perform windproof operation on the crane, causing it to slow down and stop.

3. The crane windproofing method according to claim 1, characterized in that, Determining whether the crane is about to be in an abnormal displacement state based on the adhesion force and the horizontal thrust specifically includes: A safety threshold is set based on the adhesion force; If the horizontal thrust is greater than or equal to the safety threshold, the crane will be in an abnormal displacement state. If the horizontal thrust is less than the safety threshold, the displacement of the crane is further obtained, and the crane is further judged as to whether it is in an abnormal displacement state based on the displacement of the crane and the displacement threshold.

4. The crane windproofing method according to claim 1, characterized in that, The crane is determined to be in a traveling or parked state based on the traveling commands collected by the traveling sampling unit.

5. The method for wind protection of a crane according to any one of claims 1 to 4, characterized in that, When the crane is in the parked state, the wind protection method also includes zero-position calibration, the specific calibration process of which includes: When the crane is not in a state of inertial displacement, the current position is calibrated as the initial zero position; when the crane is in a state of inertial displacement and a reverse signal is detected, the current position is calibrated as the initial zero position. Detect the peak offset in different offset directions during each round of offset; Accurate zero-position calibration is performed based on the offset peak values ​​in different offset directions during multiple consecutive offset processes.

6. The crane windproofing method according to claim 5, characterized in that, The offset direction includes a first offset direction and a second offset direction, wherein the first offset direction is opposite to the second offset direction; Accurate zero-position calibration is performed based on the offset peak values ​​in different offset directions during multiple consecutive offset cycles, specifically including: Calculate the first average of the peak values ​​of the offsets in the first offset direction and the second offset direction during each round of offset; Calculate the mean of all first averages, and use that mean as the final zero.

7. A crane windproof system, comprising a windproof device and a windproof control unit, characterized in that, The windproof control unit includes: The travel sampling unit is used to monitor the travel commands of the crane; Displacement sampling unit is used to monitor the position status of the crane; Wind speed sampling unit, used to monitor wind speed and direction; The mode selection unit is used to generate a wind prevention mode selection signal; and a main control unit, the main control unit being used for: The system determines whether the crane is in a traveling or parked state based on the traveling command monitored by the traveling sampling unit; it calculates the crane's displacement and speed based on the position status monitored by the displacement sampling unit, and determines whether the crane has overspeeded based on the crane's speed; and it determines whether to select the anti-wind mode based on the anti-wind mode selection signal generated by the mode selection unit. When the crane is traveling and speed exceeds the limit, control the crane to slow down and stop. When the crane is in the parking state and the wind prevention mode is not selected, the system determines whether the crane is in an abnormal displacement state based on the crane's displacement amount and displacement threshold, and controls the wind prevention device to perform wind prevention operation on the crane when it is in an abnormal displacement state. When the crane is in the parking state and the wind prevention mode is selected, the adhesion between the crane wheels and the rails and the horizontal thrust generated by the crane under wind load are calculated. Based on the adhesion and the horizontal thrust, it is determined whether the crane is about to be in an abnormal displacement state. When the crane is about to be in an abnormal displacement state, the wind prevention device is controlled to perform wind prevention operation on the crane.

8. The crane windproof system according to claim 7, characterized in that, The mode selection unit is a mode selection button or a display screen.

9. The crane windproof system according to claim 7 or 8, characterized in that, The main control unit is also used to perform zero-position calibration when the crane is in the parked state, specifically for: The position status monitored by the displacement sampling unit is used to determine whether the crane is in an inertial displacement state; When the crane is not in a state of inertial displacement, the current position is calibrated as the initial zero position; when the crane is in a state of inertial displacement and a reverse signal is detected, the current position is calibrated as the initial zero position. Detect the peak offset in different offset directions during each round of offset; Accurate zero-position calibration is performed based on the offset peak values ​​in different offset directions during multiple offset processes.

10. A crane, characterized in that, The crane includes a crane windproof system as described in any one of claims 7 to 9.

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