Tower crane equipment management system

Abstract

The invention relates to the technical field of tower crane safety management, and particularly discloses a tower crane equipment management system which comprises an equipment data monitoring module, a tower crane console and a prediction analysis platform, the equipment data monitoring module is used for acquiring the current orientation of a tower crane boom and the wind speed and direction information of the tower crane; the prediction analysis platform comprises a shutdown management unit, a wind speed and wind direction prediction unit, a tower crane angle adjustment unit and a database, the shutdown management unit is used for setting a tower crane shutdown time period, and the wind speed and wind direction prediction unit obtains a maximum wind speed prediction value and a corresponding first wind direction prediction value in the shutdown time period through a wind speed and wind direction prediction model; and the tower crane angle adjusting unit is used for obtaining the optimal shutdown direction of the tower crane boom according to the first wind direction predicted value. The objective of the invention is to solve the problem that the existing tower crane management system does not consider the wind speed and wind direction management on the shutdown direction during shutdown, so that the tower crane bears larger bending moment and the stability is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of tower crane safety management, and in particular to a tower crane equipment management system. Background Art

[0002] Tower cranes are rotating cranes with booms mounted on the top of tall towers. They have a large working range and are mainly used for vertical transportation of materials and component installation in multi-story and high-rise building construction. They play an extremely important role in alleviating the shortage of human resources in the construction industry, saving construction costs, and improving work efficiency due to their large working coverage area, simple installation and disassembly, and convenience for on-site construction operations.

[0003] The operation of tower cranes is greatly affected by wind speed and wind direction. When the wind speed exceeds the limit, the tower crane will be prohibited from working. When the tower crane is affected by the wind in the working state, the wind-exposed area can be reduced by adjusting the direction of the boom, so that the wind direction is not in the most unfavorable wind direction for the tower crane, reducing the bending moment of the tower crane, or adjusting the lifting height to reduce the impact of wind force. When the tower crane is in a non-working state, the motor of the lifting mechanism stops working, the motors of the slewing mechanism and the luffing mechanism also stop running, and the boom and the luffing trolley remain in the position when they stopped. In terms of management, the existing tower cranes generally collect the real-time wind speed at the tower crane and issue an early warning based on the collected wind speed. Some of them will predict the wind speed of the tower crane to avoid the risk of tower crane construction, but they are mainly aimed at the construction period of the tower crane. It is not public how to combine the wind speed prediction to manage the tower crane, and it is not analyzed in combination with the wind direction to which the tower crane is subjected. Since the boom of the tower crane cannot rotate after stopping work, it is impossible to actively reduce the impact of the wind on the tower crane. If during the period of suspension of work, the wind direction of the maximum wind speed to which the tower crane is subjected is along the direction of the tower crane's lifting arm, that is, the most unfavorable wind direction for the tower crane to be subjected to force, the tower crane will be subjected to a larger bending moment, thus affecting the stability of the tower crane. Summary of the invention

[0004] In view of the shortcomings of the prior art, the technical problem solved by the present invention is to provide a tower crane equipment management system to solve the problem that the existing tower crane management system does not manage the tower crane shutdown position in combination with the wind speed and direction during shutdown. If the wind direction of the maximum wind speed received by the tower crane is along the direction of the tower crane's lifting arm, the tower crane will be subjected to a large bending moment, affecting the stability of the tower crane.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a tower crane equipment management system, including an equipment data monitoring module, a tower crane control console and a prediction analysis platform;

[0006] The equipment data monitoring module is used to obtain the current position of the tower crane boom and the wind speed and direction information at the tower crane;

[0007] The data monitoring module and the tower crane control console are respectively connected to the prediction and analysis platform network;

[0008] The prediction and analysis platform includes a shutdown management unit, a feature extraction unit, a wind speed and wind direction prediction unit, a tower crane angle adjustment unit and a database, wherein the database stores historical wind speed and wind direction information of the tower crane; the shutdown management unit is used to set the shutdown time period of the tower crane, the feature extraction unit is used to extract feature data from the wind force and wind direction data collected within a set period stored in the database, and the wind speed and wind direction prediction unit is used to import the feature data into a wind speed and wind direction prediction model pre-trained with historical wind speed and wind direction information, and predict the maximum wind speed prediction value within the shutdown time period and the prediction value of the wind speed and wind direction. The first wind direction prediction value corresponding to the tower crane is sent as an adjustment parameter to the tower crane angle adjustment unit, and the tower crane angle adjustment unit is used to obtain the optimal stopping position of the tower crane boom according to the adjustment parameter; and compare the current direction of the boom with the optimal stopping position to determine whether the current direction overlaps with the optimal stopping position. If the judgment result is yes, no processing is performed; if the judgment result is no, the rotation direction and rotation angle of the current position to the optimal stopping position are calculated, and the optimal stopping position, rotation direction and rotation angle of the boom are sent to the tower crane control console.

[0009] The beneficial effects of this program are:

[0010] Compared with the traditional tower crane equipment management mode, relying solely on the real-time wind speed monitoring of the tower crane for early warning has obvious limitations and potential safety hazards. The safety of the tower crane during the downtime period is ignored, and the comprehensive analysis of wind speed and direction is not taken into consideration, making the tower crane extremely vulnerable to wind loads during the downtime period, and then subject to huge bending moments, threatening the stability of the tower crane and the overall structural safety.

[0011] This solution predicts the wind speed and direction during the shutdown period, and uses the maximum wind speed prediction value and the corresponding first wind direction prediction value as adjustment parameters to obtain the optimal shutdown direction, and adjusts the tower crane boom to the optimal shutdown position when shutting down. Since the direction of the boom is optimized, the adverse effects of wind on the tower crane can be minimized, and the bending moment generated when the maximum wind force acts on the tower crane will be significantly reduced, effectively avoiding dangerous situations such as structural deformation, fatigue damage and even collapse of the tower crane due to excessive bending moment, thereby maintaining the stability of the tower crane and extending its service life.

[0012] Further, the prediction and analysis platform also includes a rotary weathervane braking control unit;

[0013] The wind speed and wind direction prediction unit includes a prediction unit and a judgment unit, the judgment unit is used to judge whether the maximum wind speed prediction value is greater than the warning wind speed, if the judgment result is yes, then the prediction unit is used to obtain the strong wind period corresponding to the maximum wind speed, the prediction unit is also used to obtain the secondary maximum wind speed prediction value outside the strong wind period and lower than the warning wind speed, and the corresponding second wind direction prediction value; the second wind direction prediction value is sent as an adjustment parameter to the tower crane angle adjustment unit; if the judgment result is no, the prediction unit sends the first wind direction prediction value as an adjustment parameter to the tower crane angle adjustment unit;

[0014] The rotary wind vane brake control unit is used to control the rotary wind vane brake to open within a set time threshold before a strong wind period.

[0015] When the predicted maximum wind speed is lower than the warning wind speed, there is no need to open the slewing vane brake. Therefore, the first wind direction prediction value is used as the adjustment parameter to obtain the best stopping direction, and the tower crane boom is adjusted to the best stopping position when stopping, thereby reducing the bending moment caused by the maximum wind force on the tower crane, thereby maintaining the stability of the tower crane and extending the service life of the tower crane. When the predicted maximum wind speed is greater than the warning wind speed, it means that the slewing vane brake needs to be opened before exceeding the warning wind speed, so that the boom can rotate with the wind, which can make the structure of the tower crane more reasonably stressed, avoid excessive bending moment caused by the continuous strong action of the lateral wind, effectively reduce the lateral force of the wind on the tower crane, and thus reduce the risk of the tower crane overturning. However, strong winds exceeding the warning wind speed generally do not last for the entire time period, especially in inland construction areas, where strong winds are less frequent and of shorter duration. It is still necessary to analyze the wind speed and direction when the boom stops rotating in order to reduce the bending moment caused by the wind outside the strong wind period. Therefore, the second wind direction prediction value corresponding to the secondary maximum wind speed outside the strong wind period is used as the adjustment parameter to obtain the optimal shutdown direction.

[0016] Furthermore, the wind speed and direction prediction unit also includes a continuous time period judgment unit, which is further used to generate a prediction data set of wind speed and direction within the shutdown time period, and the judgment unit is further used to mark multiple wind speed values ​​that exceed the warning wind speed as dangerous wind speeds from the prediction data set, and mark the time period corresponding to the dangerous wind speed as a dangerous period; the continuous time period judgment unit is used to merge the time difference values ​​of adjacent dangerous time periods in multiple dangerous time periods that are less than a set first time difference as a strong wind period, and there are one or more strong wind periods.

[0017] Furthermore, the prediction and analysis platform also includes a braking judgment unit, and the data monitoring unit is also used to obtain the current rotation speed of the crane arm and the switch status of the slewing brake. The braking judgment unit is used to send a closing control signal to the slewing weathervane braking unit when the braking conditions are met. The braking conditions include that the current rotation speed of the crane arm is lower than the set rotation speed, and the current time period is not in a strong wind period; the slewing weathervane braking unit controls the slewing weathervane brake to close.

[0018] There may be multiple time periods that exceed the warning wind speed during the downtime period. Merging them facilitates the management of the on / off status of the slewing vane brake to avoid frequent switching of the slewing vane brake in a short period of time. When the braking conditions are met, the slewing vane brake is turned off so that the boom no longer rotates with the wind. The stable posture can reduce the stress changes caused by unnecessary shaking inside the tower crane structure, which is conducive to extending the service life of the tower crane. If the dangerous time periods are not merged, it is necessary to detect whether the requirements are met in multiple time periods, and the slewing vane brake will be frequently switched on and off, which will affect the braking performance of the slewing vane brake.

[0019] Furthermore, the braking judgment unit is also used to obtain a braking time difference, where the braking time difference is a time difference between a current time period and a next strong wind time period, and the braking condition also includes that the braking time difference is less than a set second time difference.

[0020] If the boom can be stopped very close to a period of strong winds, for example, the second time difference is half an hour, when the speed meets the shutdown requirements, but there is less than half an hour before the next period of strong winds exceeding the warning wind speed, and the slewing wind vane brake needs to be opened again, the slewing wind vane brake will not be closed. Frequent opening and closing of the slewing wind vane brake will affect the brake performance.

[0021] Furthermore, the braking judgment unit is also used to obtain an optimal braking range, which is a fan-shaped range formed by rotating the optimal stopping position along the set angles clockwise and counterclockwise, and the braking condition also includes that the current position of the boom is within the optimal braking range. When the slewing vane brake is turned off, the boom is fixed within the optimal braking range, thereby reducing the bending moment of the subsequent tower crane due to the secondary maximum wind speed, thereby helping to maintain the stability of the tower crane. Secondly, because the boom of the tower crane will rotate with the wind when the slewing vane brake is turned on, it is not easy for the boom to stop at the optimal stopping position even at a very low rotation speed. By setting the stopping range, the boom can be better controlled to stop within the ideal range. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a module diagram of the management system of the present invention.

[0023] Figure 2Schematic diagram of optimal braking direction and optimal braking range. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] Embodiment 1 is basically as attached Figure 1 As shown:

[0026] A tower crane equipment management system, including an equipment data monitoring module, a tower crane control console and a prediction analysis platform;

[0027] The equipment data monitoring module is used to obtain the current position of the tower crane's boom and the wind speed and direction information at the tower crane;

[0028] The data monitoring module and the tower crane control console are respectively connected to the prediction and analysis platform network; the data monitoring module obtains the current position of the crane arm through a rotation angle sensor or GPS positioning, and obtains the wind speed and direction information at the tower crane through a wind speed sensor.

[0029] The prediction and analysis platform includes a shutdown management unit, a feature extraction unit, a wind speed and direction prediction unit, a tower crane angle adjustment unit, and a database slewing wind vane braking control unit; the database stores historical wind speed and direction information of the tower crane; the shutdown management unit is used to set the tower crane shutdown time period; the feature extraction unit is used to extract feature data from the wind force and direction data collected within a set period stored in the database; the set period can be 1-4 weeks from the current time, and in this embodiment it is 1 week.

[0030] The wind speed and direction prediction unit includes a prediction unit and a judgment unit. The prediction unit is used to import the characteristic data into the wind speed and direction prediction model pre-trained by the historical wind speed and direction information, and obtain the maximum wind speed prediction value and the corresponding first wind direction prediction value within the downtime period; the judgment unit is used to judge whether the maximum wind speed prediction value is greater than the warning wind speed. If the judgment result is yes, the time period corresponding to the wind speed exceeding the warning wind speed within the downtime period is obtained through the prediction unit as a strong wind period. The prediction unit is also used to obtain the secondary maximum wind speed prediction value outside the strong wind period and lower than the warning wind speed, and the corresponding second wind direction prediction value; the second wind direction prediction value is sent as an adjustment parameter to the tower crane angle adjustment unit; if the judgment result is no, the prediction unit sends the first wind direction prediction value as an adjustment parameter to the tower crane angle adjustment unit; the warning wind speed is level 6 wind speed.

[0031] The tower crane angle adjustment unit is used to obtain the optimal stopping position of the tower crane boom according to the adjustment parameters; and compare the current direction of the boom with the optimal stopping position to determine whether the current direction overlaps with the optimal stopping position. If the judgment result is yes, no processing is performed; if the judgment result is no, the rotation direction and rotation angle of the current position to the optimal stopping position are calculated, and the optimal stopping position, rotation direction and rotation angle of the boom are sent to the tower crane control console.

[0032] The slewing wind vane brake control unit is used to control the slewing wind vane brake to open within a set time threshold before the strong wind period. The set time threshold is ten minutes.

[0033] When the predicted maximum wind speed is lower than the warning wind speed, there is no need to open the slewing vane brake. Therefore, the first wind direction prediction value is used as the adjustment parameter to obtain the best stopping direction, and the tower crane boom is adjusted to the best stopping position when stopping, thereby reducing the bending moment caused by the maximum wind force on the tower crane, thereby maintaining the stability of the tower crane and extending the service life of the tower crane. When the predicted maximum wind speed is greater than the warning wind speed, it means that the slewing vane brake needs to be opened before exceeding the warning wind speed, so that the boom can rotate with the wind, which can make the structure of the tower crane more reasonably stressed, avoid excessive bending moment caused by the continuous strong action of the lateral wind, effectively reduce the lateral force of the wind on the tower crane, and thus reduce the risk of the tower crane overturning. However, strong winds exceeding the warning wind speed generally do not last for the entire time period, especially in inland construction areas, where strong winds are less frequent and of shorter duration. It is still necessary to analyze the wind speed and direction when the boom stops rotating in order to reduce the bending moment caused by the wind outside the strong wind period. Therefore, the second wind direction prediction value corresponding to the secondary maximum wind speed outside the strong wind period is used as the adjustment parameter to obtain the optimal shutdown direction.

[0034] The similarities between Example 2 and Example 1 are not repeated here. The difference is that the wind speed and direction prediction unit also includes a continuous time period judgment unit, and the prediction unit is also used to generate a prediction data set of wind speed and direction within the shutdown time period, and the judgment unit is also used to mark multiple wind speed values ​​exceeding the warning wind speed as dangerous wind speeds from the prediction data set, and mark the time period corresponding to the dangerous wind speed as a dangerous period; the continuous time period judgment unit is used to merge the time difference values ​​of adjacent dangerous time periods in multiple dangerous time periods that are less than the set first time difference as a strong wind period, and there are one or more strong wind periods.

[0035] The prediction and analysis platform also includes a braking judgment unit. The data monitoring unit is also used to obtain the current rotation speed of the crane arm and the switch state of the slewing brake. The braking judgment unit is used to send a closing control signal to the slewing vane braking unit when the braking conditions are met. The braking conditions include that the current rotation speed of the crane arm is lower than the set rotation speed and the current time period is not in the strong wind period; the slewing vane braking unit controls the slewing vane brake to close. The set rotation speed is an angular velocity of 0.05-0.1 radians / second, and the embodiment is 0.1 radians / second.

[0036] There may be multiple time periods during the downtime period when the wind speed exceeds the warning wind speed. Merging them facilitates the management of the switch status of the slewing vane brake to avoid frequent switching of the slewing vane brake in a short period of time. For example, a construction site stops construction at night, and the downtime period is 8 hours from 23:00 to 7:00, and the time difference is 2 hours. In the prediction data set of wind speed and direction during the downtime period, the wind speed exceeds the warning wind speed in the three time periods of 12:00-12:10, 1:05-1:15, and 5:25-5:40 in the evening. The three time periods are marked as dangerous period I, dangerous period II, and dangerous period III, respectively, and between 12:00-12:10 and 1:05-1:15 If the time difference is less than 2 hours, and the time difference between 1:05-1:15 and 5:25-5:40 is greater than 2 hours, then the continuous period judgment unit will merge the dangerous period I and dangerous period II into strong wind period I, and the dangerous period III will be strong wind period II. After the merger, there are two strong wind periods; because the slewing vane brake is not opened between 23:00-24:00, the braking judgment unit will only judge whether the braking conditions are met in the two time periods of 1:15-5:25 and 5:40-7:00. If they are met, the slewing vane brake will be closed, so that the boom will no longer rotate with the wind. The stable posture can reduce the stress changes caused by unnecessary shaking inside the tower crane structure, which is beneficial to extend the service life of the tower crane. If the dangerous periods are not merged, it is necessary to detect whether the requirements are met in multiple time periods, and the slewing vane brake will be frequently turned on and off, thereby affecting the braking performance of the slewing vane brake.

[0037] The braking judgment unit is also used to obtain the braking time difference, which is the time difference between the current time period and the next strong wind time period. The braking condition also includes that the braking time difference is less than the set second time difference. If the boom can stop very close to a strong wind time period, for example, the second time difference is half an hour, when the speed meets the shutdown requirements, but the next strong wind time period exceeding the warning wind speed is less than half an hour, and the slewing wind vane brake needs to be opened again, the slewing wind vane brake will not be closed, and the frequent opening and closing of the slewing wind vane brake will affect the brake performance.

[0038] like Figure 2As shown, the braking judgment unit is also used to obtain the optimal braking range, which is a fan-shaped range formed by rotating the optimal stopping position along the set angles clockwise and counterclockwise, and the braking condition also includes that the current position of the boom is within the optimal braking range. When the slewing vane brake is turned off, the boom is fixed within the optimal braking range, thereby reducing the bending moment of the subsequent tower crane due to the secondary maximum wind speed, which helps to maintain the stability of the tower crane. Secondly, because the boom of the tower crane will rotate with the wind when the slewing vane brake is turned on, it is not easy for the boom to stop at the optimal stopping position even at a very low speed. By setting the stopping range, the boom can be better controlled to stop within the ideal range.

[0039] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A tower crane equipment management system, characterized in that: Includes equipment data monitoring module, tower crane control console and predictive analysis platform; The equipment data monitoring module is used to obtain the current position of the tower crane boom and the wind speed and direction information at the tower crane; The data monitoring module and the tower crane control console are respectively connected to the prediction and analysis platform network; The prediction and analysis platform includes a shutdown management unit, a feature extraction unit, a wind speed and wind direction prediction unit, a tower crane angle adjustment unit and a database, wherein the database stores historical wind speed and wind direction information of the tower crane; the shutdown management unit is used to set a shutdown time period of the tower crane, the feature extraction unit is used to extract feature data from the wind force and wind direction data collected within a set period stored in the database, the wind speed and wind direction prediction unit is used to import the feature data into a wind speed and wind direction prediction model pre-trained by historical wind speed and wind direction information, and obtain the maximum wind speed prediction value and the corresponding first wind direction prediction value within the shutdown time period, and send the first wind direction prediction value as an adjustment parameter to the tower crane angle adjustment unit, and the tower crane angle adjustment unit is used to obtain the optimal shutdown orientation of the tower crane boom according to the adjustment parameter; The current direction of the crane arm is compared with the optimal stopping position to determine whether the current direction overlaps with the optimal stopping position. If the judgment result is yes, no processing is performed. If the judgment result is no, the rotation direction and rotation angle of the current position to the optimal stopping position are calculated, and the optimal stopping position, rotation direction and rotation angle of the crane arm are sent to the tower crane control console.

2. A tower crane equipment management system according to claim 1, characterized in that: The prediction and analysis platform also includes a slewing wind vane braking control unit; The wind speed and wind direction prediction unit includes a prediction unit and a judgment unit, the judgment unit is used to judge whether the maximum wind speed prediction value is greater than the warning wind speed, if the judgment result is yes, then the prediction unit is used to obtain the strong wind period corresponding to the warning wind speed exceeding the warning wind speed during the shutdown period, and the prediction unit is also used to obtain the secondary maximum wind speed prediction value outside the strong wind period and lower than the warning wind speed, and the corresponding second wind direction prediction value; the second wind direction prediction value is sent as an adjustment parameter to the tower crane angle adjustment unit; if the judgment result is no, the prediction unit sends the first wind direction prediction value as an adjustment parameter to the tower crane angle adjustment unit; The rotary wind vane brake control unit is used to control the rotary wind vane brake to open within a set time threshold before a strong wind period.

3. A tower crane equipment management system according to claim 2, characterized in that: The wind speed and wind direction prediction unit also includes a continuous time period judgment unit, the prediction unit is also used to generate a prediction data set of wind speed and wind direction within the shutdown time period, the judgment unit is also used to mark multiple wind speed values ​​exceeding the warning wind speed as dangerous wind speeds from the prediction data set, and mark the time period corresponding to the dangerous wind speed as a dangerous period; The continuous period judgment unit is used to combine the time differences of adjacent dangerous time periods in multiple dangerous time periods that are less than a set first time difference as a strong wind period, and there are one or more strong wind periods.

4. A tower crane equipment management system according to claim 3, characterized in that: The prediction and analysis platform also includes a braking judgment unit. The data monitoring unit is also used to obtain the current rotation speed of the crane arm and the switch status of the slewing brake. The braking judgment unit is used to send a closing control signal to the slewing weathervane braking unit when the braking conditions are met. The braking conditions include that the current rotation speed of the crane arm is lower than the set rotation speed and the current time period is not in a strong wind period; the slewing weathervane braking unit controls the slewing weathervane brake to close.

5. A tower crane equipment management system according to claim 4, characterized in that: The braking judgment unit is also used to obtain a braking time difference, where the braking time difference is the time difference between a current time period and a next strong wind time period, and the braking condition also includes that the braking time difference is less than a set second time difference.

6. A tower crane equipment management system according to claim 4, characterized in that: The braking judgment unit is also used to obtain an optimal braking range, which is a fan-shaped range formed by rotating the optimal stopping position along a set angle clockwise and counterclockwise. The braking condition also includes that the current position of the crane arm is within the optimal braking range.

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