WO2021196938A1 - 一种自动化集装箱装卸装置及方法 - Google Patents
一种自动化集装箱装卸装置及方法 Download PDFInfo
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- WO2021196938A1 WO2021196938A1 PCT/CN2021/078140 CN2021078140W WO2021196938A1 WO 2021196938 A1 WO2021196938 A1 WO 2021196938A1 CN 2021078140 W CN2021078140 W CN 2021078140W WO 2021196938 A1 WO2021196938 A1 WO 2021196938A1
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- truck
- edge
- keel
- straight line
- point cloud
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
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- 238000010586 diagram Methods 0.000 description 11
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/22—Horizontal loading or unloading platforms
- B65G69/24—Horizontal loading or unloading platforms having platform level adjusting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/22—Horizontal loading or unloading platforms
- B65G69/26—Rotatable platforms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/46—Position indicators for suspended loads or for crane elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06V30/191—Design or setup of recognition systems or techniques; Extraction of features in feature space; Clustering techniques; Blind source separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/04—Loading land vehicles
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Definitions
- the invention relates to the field of crane loading and unloading, in particular to an automated container loading and unloading device and method.
- the port mostly uses manual operations to load and unload containers on the trucks.
- the tire crane driver operates the tire crane to perform container loading and unloading operations on the trucks (inner trucks and outer trucks) below them.
- the shortcomings of the manual operation of the tyre crane driver are the low efficiency of the operation and the unstable operation quality.
- the container is often smashed into the truck guide plate roughly, which will damage the box and the truck to a certain extent.
- this approach requires the establishment of a template library for comparison for different types of trucks and different types of car plates, and deviations are prone to occur, resulting in unsuccessful automatic loading and unloading.
- the technical problem to be solved by the present invention is to provide an automated container loading and unloading device and method.
- the accuracy of the board is higher, and the amount of calculation is lower.
- an automated container handling device including:
- the data acquisition module is used to scan and collect the truck board to obtain laser point cloud data
- a data preprocessing module configured to segment the acquired laser point cloud data into a laser point cloud on the surface of the collecting truck plate
- the key point extraction module is used to perform edge extraction on the laser point cloud on the surface of the truck board, so as to obtain discrete points on the edge of the keel of the truck board;
- the straight line fitting module is used to perform random sampling uniform straight line fitting on the discrete points on the edge of the keel of the truck board, so as to obtain the spatial straight line of the keel of the truck board.
- the four-dimensional control module is used to linearly control the height of the spreader to be adjusted, the rotation angle of the spreader, the position of the trolley, and the position of the truck to be adjusted according to the space of the edge of the keel of the truck.
- the data acquisition module is a laser radar
- the number of the laser radar is at least one
- the laser radar is installed on the side of the electrical room close to the truck road.
- the acquiring the spatial straight line of the edge of the truck-collecting plate keel includes acquiring the spatial straight line of one edge of the truck-collecting plate keel.
- the obtaining the spatial straight line of the edge of the truck-collecting plate keel includes obtaining the spatial straight line of the first edge and the second edge of the truck-collecting plate keel, and judging the space of the first edge Whether the angle between the straight line and the spatial straight line of the second edge is smaller than the preset value, if it is smaller than the preset value, the spatial straight line of the first edge and the spatial straight line of the second edge are merged, otherwise the set is rescanned Truck board to obtain new laser point cloud data.
- it further includes a space conversion module for horizontally projecting the spatial straight line of the edge of the keel of the truck plate, so as to obtain the height of the spreader, the rotation angle of the spreader, and the position of the trolley. , The position of the collection card that needs to be adjusted.
- the technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide an automated container loading and unloading method, which includes the following steps:
- Edge extraction is performed on the laser point cloud on the surface of the truck board, so as to obtain discrete points on the edge of the keel of the truck board;
- the discrete points on the edge of the truck board keel are randomly sampled and consistent straight line fitting is performed, so as to obtain the spatial straight line of the truck board keel edge.
- the method further includes the following steps: linearly controlling the height of the spreader to be adjusted, the rotation angle of the spreader, the position of the trolley, and the position of the truck to be adjusted according to the space of the edge of the keel of the truck.
- the height of the spreader to be adjusted, the rotation angle of the spreader to be adjusted, the position of the trolley to be adjusted, and the position of the truck to be adjusted are linearly controlled according to the space of the edge of the keel of the truck.
- the scanning collection truck board, the acquisition of laser point cloud data is completed by a data acquisition module, the data acquisition module is a lidar, the number of the lidar is at least one, and the lidar is installed near the electrical room Set the side of the truck road.
- the acquiring the spatial straight line of the edge of the truck-collecting plate keel includes acquiring the spatial straight line of one edge of the truck-collecting plate keel.
- the obtaining the spatial straight line of the edge of the truck-collecting plate keel includes obtaining the spatial straight line of the first edge and the second edge of the truck-collecting plate keel, and judging the space of the first edge Whether the angle between the straight line and the spatial straight line of the second edge is smaller than the preset value, if it is smaller than the preset value, the spatial straight line of the first edge and the spatial straight line of the second edge are merged, otherwise the set is rescanned Truck board to obtain new laser point cloud data.
- the straight line of the space of the edge of the keel of the truck board is horizontally projected, so as to obtain the height of the spreader that needs to be adjusted, the rotation angle of the spreader that needs to be adjusted, the position of the trolley that needs to be adjusted, and the amount of the truck that needs to be adjusted. Location.
- the present invention has the following beneficial effects: the automated container loading and unloading device and method provided by the present invention, after obtaining laser point cloud data, segment it into the laser point cloud on the surface of the truck plate, and compare the laser point cloud on the surface of the truck plate. Edge extraction of point cloud is used to obtain discrete points on the edge of the truck keel, and random sampling is performed on the discrete points on the edge of the truck keel. It has stronger robustness and higher accuracy. Due to the high performance, the accuracy of loading the container on the truck board is higher and the calculation amount is lower.
- the spatial straight line of the two edges of the truck plate keel where the spatial straight line of the first edge is used to adjust the height of the spreader, the rotation angle of the spreader, the position of the trolley, and the position of the truck.
- the edge space line is used to calibrate and merge the space line of the first edge, and determine whether the angle between the space line of the first edge and the space line of the second edge is less than a preset value, if less than With the preset value, the first edge spatial straight line and the second edge spatial straight line are merged, otherwise, the truck board is rescanned to obtain new laser point cloud data, thereby improving the accuracy of automated container loading and unloading.
- Figure 1 is a schematic structural diagram of an automated container loading and unloading device in an embodiment of the present invention
- FIG. 2 is a schematic diagram of the structure of the car plate of the automated container loading and unloading device in the embodiment of the present invention
- Figure 3 is a block diagram of an automated container handling device in an embodiment of the present invention.
- Figure 4 is a block diagram of an automated container handling device in another embodiment of the present invention.
- FIG. 5 is a schematic diagram of laser point cloud data acquired by the automated container loading and unloading device in the embodiment of the present invention.
- FIG. 6 is a schematic diagram of the calculation relationship of the automated container loading and unloading device in the embodiment of the present invention.
- FIG. 7 is a flowchart of an automated container loading and unloading method in an embodiment of the present invention.
- Fig. 8 is a flowchart of an automated container loading and unloading method in another embodiment of the present invention.
- FIG. 1 is a schematic structural diagram of an automated container loading and unloading device in an embodiment of the present invention.
- the automated container loading and unloading device includes a truck head 1, a truck plate 2, a lidar 5, and a lidar 6
- the electrical room 7 and the tire crane beam 8 also include laser rays 3 and 4 emitted by lidar 5 and lidar 6.
- Fig. 2 is a schematic diagram of the structure of the vehicle plate of the automated container loading and unloading device in the embodiment of the present invention.
- the vehicle plate includes a truck guide plate 9 and a truck plate keel 10. There are two truck plate keels 10 parallel to each other.
- FIG. 3 is a block diagram of an automated container handling device in an embodiment of the present invention.
- the automated container loading and unloading device includes: a data collection module 31, used to scan the collection truck board 2 to obtain laser point cloud data; a data preprocessing module 32, used to segment the acquired laser point cloud data into the collection truck board The laser point cloud on the surface; the key point extraction module 33 is used for edge extraction of the laser point cloud on the surface of the truck board, so as to obtain the discrete points on the edge of the keel of the truck board; the straight line fitting module 34, It is used to perform random sampling uniform straight line fitting on the discrete points on the edge of the keel of the truck board, so as to obtain the spatial straight line of the keel of the truck board.
- the data acquisition module 31 is a laser radar, the number of the laser radar is at least one, and the laser radar is installed on the side of the electrical room close to the truck road.
- the lidar 5 and the lidar 6 are multi-line lasers, which are distributed at the front and rear ends along the direction of the cart, so that the respective laser rays 3 and 4 of the lidar 5 and the lidar 6 can respectively cover To set part of the truck board 2.
- FIG. 4 is a block diagram of an automated container handling device in an embodiment of the present invention.
- it also includes a four-dimensional control module 35 for linearly controlling the height of the spreader to be adjusted, the rotation angle of the spreader to be adjusted, and the position of the trolley that needs to be adjusted according to the space on the edge of the keel of the truck. Adjusted position.
- Fig. 5 is a schematic diagram of laser point cloud data obtained by the automated container loading and unloading device in an embodiment of the present invention.
- the lidar 5 and the lidar 6 scan the collecting truck plate 2 to obtain the data falling on the collecting truck plate 2.
- Two clusters of sparse laser point clouds, each segment of the laser point cloud represents the local features of the truck plate 2.
- the laser point cloud on the upper surface of the truck plate 2 can be segmented.
- the laser point cloud on the upper surface of the truck board 2 contains two truck board keels 10 of the truck board 2.
- edge extraction and straight line fitting are performed on the laser point cloud on the upper surface of the truck board 2 to obtain two straight lines along the outer edges of the two truck board keels 10 of the truck board 2.
- the acquiring the spatial straight line of the edge of the truck-collecting plate keel includes acquiring the spatial straight line of one edge of the truck-collecting plate keel.
- the obtaining the spatial straight line of the edge of the truck plate keel includes obtaining the spatial straight line of the first edge and the second edge of the truck plate keel, Determine whether the angle between the spatial straight line of the first edge and the spatial straight line of the second edge is smaller than a preset value, and if it is smaller than the preset value, merge the spatial straight line of the first edge and the second edge
- the edge of the space is straight, otherwise rescan the collection truck board to obtain new laser point cloud data.
- the preset value of the included angle between the spatial straight line of the first edge and the spatial straight line of the second edge may be preset, and the preset value may be a value based on experience of a person skilled in the art. Set, if the angle between the space line of the first edge and the space line of the second edge is less than the preset value, the space line of the first edge and the space line of the second edge are merged , Otherwise it means that the error between the obtained first edge and the second edge is large, and the truck board needs to be scanned again to obtain new laser point cloud data.
- edge extraction is performed on the laser point cloud clusters on the upper surface of the truck board 2.
- point clouds In this time, by arranging the point clouds in the x, y, and z directions in ascending or descending order, the discrete edges of the truck board keel 10 are obtained.
- Point. Enter the RANSAC (Random Sample Consensus Random Sample Consensus) straight line fitting to these discrete points, so as to obtain two spatial straight lines along the outer edge of the car keel.
- RANSAC Random Sample Consensus Random Sample Consensus
- the space line of the edge of the keel of the truck plate is projected horizontally, so as to obtain the height of the spreader, the rotation angle of the spreader, the position of the trolley, and the truck needs to be adjusted. Adjusted position.
- the deflection angle of the truck relative to the cart can be obtained.
- the horizontal displacement relative to the cart can be obtained.
- the relative displacement of the spreader can be obtained.
- Vertical displacement, and the position difference along the direction of the cart. In this way, it is converted into the angle at which the spreader needs to rotate, the position where the trolley needs to move, the height at which the spreader needs to drop, and the distance that the truck needs to be guided forward and backward.
- 501 is a tire crane trolley
- 502 is a tire crane trolley
- 503 is a steel wire rope
- 504 is the distance between the spreader and the truck plate 2 h
- 505 is the spreader
- 506 is the linear space translation of the truck plate keel.
- Auxiliary line 507 is the horizontal projection angle ⁇ between the spreader and the truck plate keel
- 508 is the edge line of the truck keel
- 509 is the horizontal projection distance d between the spreader 505 and the truck plate 2 along the direction of the truck 502
- 510 is the horizontal projection distance x between the spreader 505 and the truck 501 in the direction of the trolley 501
- 511 is the auxiliary line in the direction of the truck 502
- 512 is the auxiliary line at the end of the short side of the truck slab 2.
- IPC Intelligent Personal Computer
- PLC Programmable Logic Controller
- the technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide an automated container loading and unloading method, which includes the following steps:
- Step 601 Scan the collection truck board to obtain laser point cloud data
- Step 602 Segment the acquired laser point cloud data into the laser point cloud on the surface of the collecting truck board;
- Step 603 Perform edge extraction on the laser point cloud on the surface of the truck board, so as to obtain discrete points on the edge of the keel of the truck board;
- Step 604 Perform random sampling uniform straight line fitting on the discrete points on the edge of the keel of the truck board, so as to obtain the spatial straight line of the keel of the truck board.
- the scanning collection truck board, the acquisition of laser point cloud data is completed by a data acquisition module, the data acquisition module is a lidar, the number of the lidar is at least one, and the lidar is installed near the electrical room Set the side of the truck road.
- the acquiring the spatial straight line of the edge of the truck-collecting plate keel includes acquiring the spatial straight line of one edge of the truck-collecting plate keel.
- FIG. 8 is a flowchart of an automated container loading and unloading method in another embodiment of the present invention. It also includes the following steps. Step 605: linearly control the height of the spreader to be adjusted, the rotation angle of the spreader, the position of the trolley, and the position of the truck to be adjusted according to the space of the edge of the keel of the truck.
- the obtaining the spatial straight line of the edge of the truck-collecting plate keel includes obtaining the spatial straight line of the first edge and the second edge of the truck-collecting plate keel, and judging the space of the first edge Whether the angle between the straight line and the spatial straight line of the second edge is smaller than the preset value, if it is smaller than the preset value, the spatial straight line of the first edge and the spatial straight line of the second edge are merged, otherwise the set is rescanned Truck board to obtain new laser point cloud data.
- the preset value of the included angle between the spatial straight line of the first edge and the spatial straight line of the second edge may be preset, and the preset value may be a value based on experience of a person skilled in the art. Set, if the angle between the space line of the first edge and the space line of the second edge is less than the preset value, the space line of the first edge and the space line of the second edge are merged , Otherwise it means that the error between the obtained first edge and the second edge is large, and the truck board needs to be scanned again to obtain new laser point cloud data.
- the straight line of the space of the edge of the keel of the truck board is horizontally projected, so as to obtain the height of the spreader that needs to be adjusted, the rotation angle of the spreader that needs to be adjusted, the position of the trolley that needs to be adjusted, and the amount of the truck that needs to be adjusted. Location.
- the automated container loading and unloading device and method obtained laser point cloud data, segment it into the laser point cloud on the surface of the collecting truck plate, and perform edge extraction on the laser point cloud on the surface of the collecting truck plate to obtain the laser point cloud data.
- the discrete points on the edge of the truck plate keel are randomly sampled and consistent linear fitting is performed on the discrete points on the edge of the truck plate keel, so as to obtain the spatial straight line of the truck plate keel edge, and then adjust the height of the spreader,
- the rotation angle of the spreader, the position of the trolley, and the position of the truck have stronger robustness and higher accuracy, making the loading of the container onto the truck board more accurate and less computationally expensive.
- the spatial straight line of the two edges of the truck plate keel where the spatial straight line of the first edge is used to adjust the height of the spreader, the rotation angle of the spreader, the position of the trolley, and the position of the truck.
- the edge space line is used to calibrate and merge the space line of the first edge, and determine whether the angle between the space line of the first edge and the space line of the second edge is less than a preset value, if less than With the preset value, the first edge spatial straight line and the second edge spatial straight line are merged, otherwise, the truck board is rescanned to obtain new laser point cloud data, thereby improving the accuracy of automated container loading and unloading.
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Abstract
Description
Claims (12)
- 一种自动化集装箱装卸装置,其特征在于,包括:数据采集模块,用于扫描集卡车板,获取激光点云数据;数据预处理模块,用于将获取的所述激光点云数据分割出所述集卡车板表面的激光点云;关键点提取模块,用于对所述集卡车板表面的激光点云进行边缘提取,从而获取所述集卡车板龙骨边缘上的离散的点;直线拟合模块,用于对所述集卡车板龙骨边缘上的离散的点进行随机采样一致性直线拟合,从而获取所述集卡车板龙骨边缘的空间直线。
- 根据权利要求1所述的自动化集装箱装卸装置,其特征在于,还包括:四维控制模块,用于根据所述集卡车板龙骨边缘的空间直线控制吊具需要调整的高度、吊具需要调整的旋转角度以及小车需要调整的位置、集卡需要调整的位置。
- 根据权利要求1所述的自动化集装箱装卸装置,其特征在于,所述数据采集模块为激光雷达,所述激光雷达的数量为至少一个,所述激光雷达安装在电气房靠近集卡车道的一侧。
- 根据权利要求1所述的自动化集装箱装卸装置,其特征在于,所述获取所述集卡车板龙骨边缘的空间直线包括获取所述集卡车板龙骨的一条边缘的空间直线。
- 根据权利要求1所述的自动化集装箱装卸装置,其特征在于,所述获取所述集卡车板龙骨边缘的空间直线包括获取所述集卡车板龙骨的第一条边缘的空间直线和第二条边缘的空间直线,判断所述第一条边缘的空间直线和第二条边缘的空间直线之间的夹角是否小于预设值,如果小于预设值,则融合所述第一条边缘的空间直线和第二条边缘的空间直线,否则重新扫描集卡车板,获取新的激光点云数据。
- 根据权利要求1所述的自动化集装箱装卸装置,其特征在于,还包括空间转换模块,用于将所述集卡车板龙骨边缘的空间直线进行水平投影,从而获取吊具需要调整的高度、所述吊具需要调整的旋转角度以及小车需要调整的位置、所述集卡需要调整的位置。
- 一种自动化集装箱装卸方法,其特征在于,包括以下步骤:扫描集卡车板,获取激光点云数据;将获取的所述激光点云数据分割出所述集卡车板表面的激光点云;对所述集卡车板表面的激光点云进行边缘提取,从而获取所述集卡车板龙骨边缘上的离散的点;对所述集卡车板龙骨边缘上的离散的点进行随机采样一致性直线拟合,从而获取所述集卡车板龙骨边缘的空间直线。
- 根据权利要求7所述的自动化集装箱装卸方法,其特征在于,还包括以下步骤:根据所述集卡车板龙骨边缘的空间直线控制吊具需要调整的高度、吊具需要调整的旋转角度以及小车需要调整的位置、集卡需要调整的位置。
- 根据权利要求7所述的自动化集装箱装卸方法,其特征在于,所述扫描集卡车板,获取激光点云数据通过数据采集模块来完成,所述数据采集模块为激光雷达,所述激光雷达的数量为至少一个,所述激光雷达安装在电气房靠近集卡车道的一侧。
- 根据权利要求7所述的自动化集装箱装卸方法,其特征在于,所述获取所述集卡车板龙骨边缘的空间直线包括获取所述集卡车板龙骨的一条边缘的空间直线。
- 根据权利要求7所述的自动化集装箱装卸方法,其特征在于,所述获取所述集卡车板龙骨边缘的空间直线包括获取所述集卡车板龙骨的第一条边缘的空间直线和第二条边缘的空间直线,判断所述第一条边缘的空间直线和第二条边缘的空间直线之间的夹角是否小于预设值,如果小于预设值,则融合所述第一条边缘的空间直线和第二条边缘的空间直线,否则重新扫描集卡车板,获取新的激光点云数据。
- 根据权利要求7所述的自动化集装箱装卸方法,其特征在于,将所述集卡车板龙骨边缘的空间直线进行水平投影,从而获取吊具需要调整的高度、所述吊具需要调整的旋转角度以及小车需要调整的位置、所述集卡需要调整的位置。
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