GANTRY SYSTEM

PRIORITY

The present application claims priority to U.S. Provisional Patent Application Ser. No. 62/473,857 filed March 20, 2017, the disclosure of which is hereby incorporated by reference in its entirety.

BACKGROUND

The invention generally relates to storage and retrieval systems, and relates in particular to automated storage and retrieval systems that are used with systems for processing objects.

Automated storage and retrieval systems (AS/RS) generally include computer controlled systems for automatically storing (placing) and retrieving items from defined storage locations. Traditional AS/RS typically employ totes (or bins), which are the smallest unit of load for the system. In these systems, the totes are brought to people who pick individual items out of the totes. When a person has picked the required number of items out of the tote, the tote is then re-inducted back into the AS/RS.

In these traditional systems, the totes are brought to a person, and the person may either remove an item from the tote or add an item to the tote. The tote is then returned to the storage location. Such systems, for example, may be used in libraries and warehouse storage facilities. The AS/RS involves no processing of the items in the tote, as a person processes the objects when the tote is brought to the person. This separation of jobs allows any automated transport system to do what it is good at - moving totes - and the person to do what the person is better at - picking items out of cluttered totes. It also means the person may stand in one place while the transport system brings the person totes, which increases the rate at which the person can pick goods. There are limits however, on such conventional systems in terms of the time and resources required to move totes toward and then away from each person, as well as how quickly a person can process totes in this fashion in applications where each person may be required to process a large number of totes. There remains a need therefore, for an AS/RS that stores and retrieves objects more efficiently and cost effectively, yet also assists in the processing of a wide variety of objects.

SUMMARY

In accordance with an embodiment, the invention provides a storage, retrieval and processing system for processing objects. The storage, retrieval and processing system includes a plurality of storage bins, a plurality of destination bins, and a processing programmable motion device. The plurality of storage bins provides storage of a plurality of objects, where the plurality of storage bins are in communication with a gantry retrieval conveyance system for moving selected bins to a bin processing location. The plurality of destination bins are in communication with the gantry retrieval conveyance system for moving a selected destination bin to the processing location. The processing programmable motion device is at the processing location and is in communication with the gantry retrieval conveyance system. The processing programmable motion device includes an end effector for grasping and moving a selected object out of a selected storage bin and depositing the selected object in the selected destination bin.

In accordance with another embodiment, the invention provides a storage, retrieval and processing system for processing objects. The storage, retrieval and processing system includes plurality of storage bins providing storage of a plurality of objects, where the plurality of storage bins being in communication with a gantry retrieval conveyance system for moving selected storage bins to a storage bin processing location, a processing programmable motion device in communication with the storage bin processing location for receiving a selected storage bin from the plurality of bins, where the processing programmable motion device including an end effector for grasping and moving a selected object out of a selected storage bin, and a plurality of destination bins in communication with a destination conveyance system for moving a selected destination bin from a destination bin processing location that is proximate the processing programmable motion device.

In accordance with a further embodiment, the invention provides a method of providing storage, retrieval and processing of objects. The method includes the steps of providing a plurality of storage bins for storing a plurality of objects, where the plurality of storage bins being in communication with a gantry retrieval conveyance system, receiving a storage bin from the plurality of storage bins proximate a programmable motion device in communication with the retrieval conveyance system, receiving a selected destination bin from a plurality of destination bins, grasping and moving a selected object out of the selected storage bin, receiving the selected object from the programmable motion device, and carrying the selected object to the selected destination bin.

BRIEF DESCRIPTION OF THE DRAWINGS

The following description may be further understood with reference to the accompanying drawings in which:

Figure 1 shows an illustrative diagrammatic view of a storage, retrieval and processing system in accordance with an embodiment of the present invention;

Figure 2 shows an illustrative diagrammatic view of bin retrieval system for use in the storage, retrieval and processing system of Figure 1;

Figures 3A and 3B show illustrative diagrammatic views of grasping mechanisms for use in the retrieval system of Figure 2 for grasping different types of bins; Figure 4 shows an illustrative diagrammatic view of processing programmable motion device for use in a system of Figure 1;

Figure 5 shows an illustrative diagrammatic view from the perception system of Figure 4, showing a view of objects within a bin of objects to be processed;

Figures 6A and 6B show an illustrative diagrammatic view of a grasp selection process in a storage, retrieval and processing system of the an embodiment of the present invention;

Figures 7 A and 7B show an illustrative diagrammatic view of a grasp planning process in a storage, retrieval and processing system of the an embodiment of the present invention;

Figures 8A and 8B show an illustrative diagrammatic view of a grasp execution process in a storage, retrieval and processing system of the an embodiment of the present invention;

Figure 9 shows an illustrative diagrammatic view of a storage, retrieval and processing system in accordance with another embodiment of the present invention employing a single common gantry system;

Figure 10 shows an illustrative diagrammatic view of a storage, retrieval and processing system in accordance with a further embodiment of the present invention employing a processing station between arrays of storages bins and processing bins; and

Figure 11 shows an illustrative diagrammatic view of a storage, retrieval and processing system in accordance with a further embodiment of the present invention employing multiple floors of systems as shown in Figure 10.

The drawings are shown for illustrative purposes only.

DETAILED DESCRIPTION

In accordance with an embodiment, the invention provides a processing system for processing objects. The processing system includes a plurality of storage bins providing storage of a plurality of objects, a processing programmable motion device, and a plurality of destination bins. The plurality of storage bins are in communication with a storage bin retrieval conveyance system for moving selected storage bins to a storage bin processing location. The processing programmable motion device is in communication with the storage bin processing location for receiving a selected storage bin from the plurality of bins, and the processing programmable motion device includes an end effector for grasping and moving a selected object out of a selected storage bin. The plurality of destination bins is in communication with a destination conveyance system for moving a selected destination bin from a destination bin processing location that is proximate the processing programmable motion device to the plurality of destination bins.

With reference to Figure 1, a system 10 of an embodiment of the present invention includes storage section 12 for storing a plurality of storage bins 14, a destination section 16 for maintaining a plurality of destination bins 18, and a processing section 20 that includes a programmable motion device 22. The storage section also includes a storage programmable motion device 24 for moving storage bins 14 to and from the processing station 20, and the destination section includes a destination programmable motion device 26 for moving destination bins to and from the processing section 20. In particular, the devices 24, 26 may bring bins to and retrieve bins from conveyors 21 that feed bins to and from the programmable motion device 22. Generally, one or a small number of storage bins 14 are provided to the processing section 20, and one or a small number of destination bins 18 are provided to the processing section 20.

The processing programmable motion device 22 (e.g., a robotic articulated arm) then distributes objects from the retrieved storage bins to the retrieved destination bins. The programmable motion device 20 is programmed to retrieve objects from the selected storage bin(s), and provide them to destination bins 22 in accordance with a manifest. Following processing, the returned storage bin(s) may be returned anywhere in the storage section as long as the system knows where each bin has been returned, and the returned destination bin(s) may be returned anywhere in the storage section as long as the system knows where each bin has been returned. The bins may be provided as boxes, totes, containers or any other type of device that may receive and hold an item.

Figure 2 shows the storage programmable motion device 24 that includes and is mounted from an x-y gantry 23, 25. The destination programmable motion device 26 may be the same as device 24 and similarly include the same x-y gantry 23, 25. The x-y gantry provides that a grasping mechanism 30 the device (24, 26), may be moved in X and Y direction (horizontally) so that all bins within the section may be readily accessed by the grasping mechanism 30 of the device (24, 26). Figure 3A shows the grasping mechanism 30 of the device 24 grasping a storage bin 14, and Figure 3B shows the grasping mechanism 30 of the device 26 grasping a destination bin 18. The grasping device may, for example, move the clamp walls away from each other when being lowered over a bin, then bring the clamp walls close to each other to grasp a bin. Releasing a bin would involve moving the clamp walls away from each other.

Figure 4 shows the processing station 20, which includes the processing programmable motion device 22 (e.g., an articulated arm) having an end effector 32. The processing station also includes a perception unit 40 for providing perception data (e.g., camera images or scanning data) regarding the bins 14, 18, and in particular, regarding the contents of the storage bins 14. Since the system places the bins 14, 18 at the processing station, the system will know the locations of the bins. The processing system however, should determine proper grasp locations of the objects in the bin(s) 14. Figure 5 shows an image view 50 of the bin 14 from the perception unit 40. The image view shows the bin 14, and the bin 14 contains objects 78, 80, 82, 84 and 86. In the present embodiment, the objects are homogenous, and are intended for distribution to different distribution packages. Superimposed on the objects 78, 80, 82, 84, 86 (for illustrative purposes) are anticipated grasp locations 79, 81, 83 and 85 of the objects. Note that while candidate grasp locations 79, 83 and 85 appear to be good grasp locations, grasp location 81 does not because its associated object is at least partially underneath another object. The system may also not even try to yet identify a grasp location for the object 84 because the object 84 is too obscured by other objects. Candidate grasp locations may be indicated using a 3D model of the robot end effector placed in the location where the actual end effector would go to use as a grasp location as shown in Figure 5. Grasp locations may be considered good, for example, if they are close to the center of mass of the object to provide greater stability during grasp and transport, and/or if they avoid places on an object such as caps, seams etc. where a good vacuum seal might not be available.

If an object cannot be fully perceived by the detection system, the perception system considers the object to be two different objects, and may propose more than one candidate grasps of such two different objects. If the system executes a grasp at either of these bad grasp locations, it will either fail to acquire the object due to a bad grasp point where a vacuum seal will not occur, or will acquire the object at a grasp location that is very far from the center of mass of the object and thereby induce a great deal of instability during any attempted transport. Each of these results is undesirable.

If a bad grasp location is experienced, the system may remember that location for the associated object. By identifying good and bad grasp locations, a correlation is established between features in the 2D/3D images and the idea of good or bad grasp locations. Using this data and these correlations as input to machine learning algorithms, the system may eventually learn, for each image presented to it, where to best grasp an object, and where to avoid grasping an object.

As shown in Figures 6A and 6B, the perception system may also identify portions of an object that are the most flat in the generation of good grasp location information. In particular, if an object includes a tubular end and a flat end such as object 87, the system would identify the more flat end as shown at 88 in Figure 6B. Additionally, the system may select the area of an object where a UPC code appears, as such codes are often printed on a relatively flat portion of the object to facilitate scanning of the barcode.

Figures 7 A and 7B show that for each object 90, 92, the grasp selection system may determine a direction that is normal to the selected flat portion of the object 90, 92. As shown in Figures 8A and 8B, the robotic system will then direct the end effector 94 to approach each object 90, 92 from the direction that is normal to the surface in order to better facilitate the generation of a good grasp on each object. By approaching each object from a direction that is substantially normal to a surface of the object, the robotic system significantly improves the likelihood of obtaining a good grasp of the object, particularly when a vacuum end effector is employed.

The invention provides therefore in certain embodiments that grasp optimization may be based on determination of surface normal, i.e., moving the end effector to be normal to the perceived surface of the object (as opposed to vertical picks), and that such grasp points may be chosen using fiducial features as grasp points, such as picking on a barcode, given that barcodes are almost always applied to a flat spot on the object.

With reference to Figure 9, in accordance with a further embodiment, the invention provides system 100 that may similarly include a storage section for storing a plurality of storage bins 114, a destination section for maintaining a plurality of destination bins 118, and a processing section 120 that includes a programmable motion device 122. Note that the storage section is mingled with the destination section, such that the storage bins 114 are mingled with the destination bins 118. Any location, in fact, may change fluidly during processing, providing that the system may use any location for either a storage bin 114 or a destination bin 118 as bins are processed. The system also includes a common programmable motion device 124 for moving storage bins 114 to and from the processing station 120, and for moving destination bins 118 to and from the processing section 120 using, for example, either of the grasping mechanisms of Figures 3 A or 3B as may be best suited for the bins.

Both the storage programmable device 124 and the destination programmable motion device 126 are provided with a single common gantry system 128, permitting each grasping mechanism 130 to access all bins 114, 118. In the system 100 of Figure 9, in fact, there is no requirement that the bins 114, 118 be maintained in physically separate areas as they may be comingled. This is also true of the systems 10, 200 and 300. In this case the storage section may be discontinuous and include the places where storage bins are located, and the destination section may be discontinuous and include the places where destination bins are located. If the bins were fully intermingled, each section would have a checkerboard - like composition.

Again, one or a small number of storage bins 114 are provided to the processing section 120, and one or a small number of destination bine 118 are provided to the processing section 120. The processing programmable motion device 122 (e.g., a robotic articulated arm) then distributes objects from the retrieved storage bins to the retrieved destination bins. The programmable motion device 120 is programmed to retrieve objects from the selected storage bin(s), and provide them to destination bins 122 in accordance with a manifest. Following processing, the returned storage bin(s) may be returned anywhere in the storage section as long as the system knows where each bin has been returned, and the returned destination bin(s) may be returned anywhere in the storage section as long as the system knows where each bin has been returned. Once a destination bin is completely processed, the bin may be placed on an output conveyor or output staging area, or placed on a floor pallet for shipment.

With reference to Figure 10, in accordance with a further embodiment, the invention provides a system 200 that may include a pair of storage sections 212 for storing a plurality of storage bins 214, a pair of destination sections 216 for maintaining a plurality of destination bins 218, and a common processing section 220 that includes a programmable motion device 222. Each storage section 212 also includes a storage programmable motion device 224 for moving storage bins 214 to and from the processing station 220, and each destination section 216 includes a destination programmable motion device 226 for moving destination bins 218 to and from the processing section 220. The operation of the system is the same as that of the system of Figure 9, except that the processing section 220 is able to receive bins 214, 218 from a plurality of sources.

Figure 11 shows a system 300 in accordance with a further embodiment of the invention that includes many storage sections 312 for storing a plurality of storage bins 314, many destination sections 316 for maintaining a plurality of destination bins 318, and many processing sections 320 that each include a programmable motion device 322. Each storage section 312 may also be accessed by multiple storage programmable motion devices 324 for moving storage bins 214 to and from the processing stations 320, and each destination section 316 may be accessed by multiple destination programmable motion devices 326 for moving destination bins 318 to and from the processing sections 320. The operation of the system is the same as that of the system of Figure 9, except that the processing sections 320 are able to receive bins 314, 318 from many sources on a floor, and there may be many such floors.

Control of each of the systems 10, 100, 200, 300 may be provided by one or more computer systems 60 that is/are in communication with the storage programmable motion devices, the destination programmable motion devices, and the processing programmable motion devices. The computer system 60 also contains the knowledge (continuously updated) of the location and identity of each of the storage bins, and contains the knowledge (also continuously updated) of the location and identity of each of the destination bins. The system therefore, directs the movement of the storage bins and the destination bins, and retrieves objects from the storage bins, and distributes the objects to the destination bins in accordance with an overall manifest that dictates which objects must be provided in which destination boxes for shipment, for example, to distribution or retail locations.

Those skilled in the art will appreciate that numerous modifications and variations may be made to the above disclosed embodiments without departing from the spirit and scope of the present invention.

What is claimed is: