ROBOTIC DEVICE TEST STATION AND METHODS

Abstract

An automated picking system robotic device testing station having rollers for engagement with the wheels of a robotic device; and a controller to vary the rotation of the rollers.

Claims

1. An automated picking system robotic device testing station comprising: rollers for moving wheels of a robotic device; and a controller to vary a rotation of the rollers.

2. A testing station as claimed in claim 1, wherein the controller is configured to vary a direction of rotation of one or more of the rollers.

3. A testing station as claimed in claim 1, wherein the controller is configured to vary a speed of rotation of one or more of the rollers.

4. A testing station as claimed in claim 1, comprising: a moveable belt, wherein the rollers move the moveable belt.

5. A testing station as claimed in claim 4, wherein the controller is configured to vary a surface profile of one or more of the rollers or the moveable belt.

6. A testing station as claimed in claim 1, comprising: two sets of rollers, wherein a first set of the two sets of rollers is arranged for engagement with a first set of wheels of a robotic device, and a second set of the two sets of rollers is arranged for engagement with a second set of wheels of that robotic device.

7. A testing station as claimed in claim 1, wherein the rollers are sized to engage with a load handling device latched to a service device.

8. A system comprising: a testing station as claimed in claim 1; and a robotic device having a set of wheels configured and arranged for rotation by the rollers.

9. A method for testing an automatic picking system robotic device, the method comprising: engaging a first set of rollers of a testing station with a first set of wheels of a robotic device; engaging a second set of rollers of the testing station with a second set of wheels of the robotic device; and rotating the first and second set of rollers sequentially by rotation of at least one of the first set of rollers and/or the second set of rollers.

10. A method for testing an automatic picking system robotic device, the method comprising: engaging a first set of rollers of a testing station with a first set of wheels of a robotic device; engaging a second set of rollers of a testing station with a second set of wheels of the robotic device; and rotating the first and second set of rollers simultaneously by rotation of at least one of the first set of rollers and/or the second set of rollers.

11. A testing station as claimed in claim 2, wherein the controller is configured to vary a speed of rotation of one or more of the rollers.

12. A testing station as claimed in claim 11, comprising: A moveable belt, wherein the rollers move the moveable belt.

13. A testing station as claimed in claim 12, wherein the controller is configured to vary a surface profile of one or more of the rollers or the moveable belt.

14. A testing station as claimed in claim 13, comprising: two sets of rollers, wherein a first set of the two sets of rollers is arranged for engagement with a first set of wheels of a robotic device, and a second set of the two sets of rollers is arranged for engagement with a second set of wheels of that robotic device.

15. A testing station as claimed in claim 14, wherein the rollers are sized to engage with a load handling device latched to a service device.

16. A system comprising: a testing station as claimed in claim 15; and a robotic device having a set of wheels configured and arranged for rotation by rotating the rollers.

Description

[0018] FIG. 1 is a schematic perspective view of a frame structure for housing a plurality of stacks of bins in a known storage system;

[0019] FIG. 2 is a schematic plan view of part of the frame structure of FIG. 1;

[0020] FIGS. 3(a) and 3(b) are schematic perspective views, from the rear and front respectively, of one form of robotic load handling device for use with the frame structure of FIGS. 1 and 2, and FIG. 3(c) is a schematic perspective view of the known load handler device in use lifting a bin;

[0021] FIG. 4 is a schematic perspective view of a known storage system comprising a plurality of load handler devices of the type shown in FIGS. 3(a), 3(b) and 3(c), installed on the frame structure of FIGS. 1 and 2;

[0022] FIG. 5 is a schematic perspective view of a testing station according to the present invention and a load handling device;

[0023] FIG. 6 is a further schematic perspective view of the testing station of FIG. 5;

[0024] FIG. 7 is a further schematic perspective view of the testing station of FIGS. 5 and 6;

[0025] FIG. 8 is a schematic perspective view of an empty testing station according to the present invention.

[0026] FIG. 9 is a schematic perspective view of an alternative testing station according to the present invention wherein a series of rollers form the moving-bed, and a load handling device.

[0027] FIG. 10 is an alternative schematic perspective view of the testing station of FIG. 9;

[0028] FIG. 11 is an alternative schematic perspective view of the testing station of FIGS. 9 and 10;

[0029] FIG. 12 is a schematic perspective view of the testing station shown in FIGS. 9 to 11.

[0030] As shown in FIGS. 1 and 2, stackable containers, known as bins 10, are stacked on top of one another to form stacks 12. The stacks 12 are arranged in a grid frame structure 14 in a warehousing or manufacturing environment. FIG. 1 is a schematic perspective view of the frame structure 14, and FIG. 2 is a top-down view showing a single stack 12 of bins 10 arranged within the frame structure 14. Each bin 10 typically holds a plurality of product items (not shown), and the product items within a bin 10 may be identical, or may be of different product types depending on the application.

[0031] The frame structure 14 comprises a plurality of upright members 16 that support horizontal members 18, 20. A first set of parallel horizontal members 18 is arranged perpendicularly to a second set of parallel horizontal members 20 to form a plurality of horizontal grid structures supported by the upright members 16. The members 16, 18, 20 are typically manufactured from metal. The bins 10 are stacked between the members 16, 18, 20 of the frame structure 14, so that the frame structure 14 guards against horizontal movement of the stacks 12 of bins 10, and guides vertical movement of the bins 10.

[0032] The top level of the frame structure 14 includes rails 22 arranged in a grid pattern across the top of the stacks 12. Referring additionally to FIGS. 3 and 4, the rails 22 support a plurality of robotic load handling devices 30. A first set 22a of parallel rails 22 guide movement of the load handling devices 30 in a first direction (X) across the top of the frame structure 14, and a second set 22b of parallel rails 22, arranged perpendicular to the first set 22a, guide movement of the load handling devices 30 in a second direction (Y), perpendicular to the first direction. In this way, the rails 22 allow movement of the load handling devices 30 in two dimensions in the X-Y plane, so that a load handling device 30 can be moved into position above any of the stacks 12.

[0033] As shown in FIG. 3 each load handling device 30 comprises a vehicle 32 which is arranged to travel in the X and Y directions on the rails 22 of the frame structure 14, above the stacks 12. A first set of wheels 34, consisting of a pair of wheels 34 on the front of the vehicle 32 and a pair of wheels 34 on the back of the vehicle 32, are arranged to engage with two adjacent rails of the first set 22a of rails 22. Similarly, a second set of wheels 36, consisting of a pair of wheels 36 on each side of the vehicle 32, are arranged to engage with two adjacent rails of the second set 22b of rails 22. Each set of wheels 34, 36 can be lifted and lowered, so that either the first set of wheels 34 or the second set of wheels 36 is engaged with the respective set of rails 22a, 22b at any one time.

[0034] When the first set of wheels 34 is engaged with the first set of rails 22a and the second set of wheels 36 are lifted clear from the rails 22, the wheels 34 can be driven, by way of a drive mechanism (not shown) housed in the vehicle 32, to move the load handling device 30 in the X direction. To move the load handling device 30 in the Y direction, the first set of wheels 34 are lifted clear of the rails 22, and the second set of wheels 36 are lowered into engagement with the second set of rails 22a. The drive mechanism can then be used to drive the second set of wheels 36 to achieve movement in the Y direction.

[0035] In this way, one or more robotic load handling devices 30 can move around the top surface of the stacks 12 on the frame structure 14 under the control of a central picking system (not shown). Each robotic load handling device 30 is provided with means 38, 39, 40 for lifting out one or more bins or containers from the stack to access the required products.

[0036] In this way, multiple products can be accessed from multiple locations in the grid and stacks at any one time.

[0037] FIG. 4 shows a typical storage system as described above, the system having a plurality of load handling devices 30 active on the stacks 12. In addition, a robotic service device 50 is positioned on the grid 14.

[0038] A robotic service device 50 comprises a vehicle 52 which is arranged to travel in the X and Y directions on the rails 22 of the frame structure 14, above the stacks 12. Robotic service devices 50 can provide a range of monitoring, support, assistance, cleaning or servicing functions to the grid, the frame structure 14 or the robotic load handling devices 30. Some robotic service devices 50 can remove a load handling device from the rails 22. Some robotic service devices 50 can remove a load handling device 30 from the grid.

[0039] The robotic service device 50 comprises a vehicle 52 having first and second sets of wheels 54, 56 that are engageable with the first and second sets 22a, 22b of rails 22, respectively.

[0040] In a similar manner to the operation of the load handling device 30, the first and second sets of wheels 1 of the robotic service device 50 can be moved vertically with respect to the vehicle 50 to engage or disengage the wheels from the corresponding set of rails 22a, 22b. By engaging and driving the appropriate set of wheels the robotic service device 50 can be moved in the X and Y directions in the horizontal plane on the top of the frame structure 14.

[0041] One or more robotic service device 50 can be provided to remove one or more load handling device 30 from the grid. The robotic service device 50 is provided with means for releasably latching to a robotic load handling device 30.

[0042] The service device 50 may then be used to push or pull the load handling device 30 to remove it from the grid.

[0043] Alternatively the service device 50 may be used to lift the load handling device 30 vertically above the rails 22 in the Z direction (perpendicular to the X and Y) with respect to the horizontal plane on the top of the frame structure 14. The service device 50 may then be used to perform maintenance, servicing, inspection, monitoring or other functions to the load handling device within the automated picking system, or to carry the load handling device 30 to remove it from the grid.

[0044] It will be appreciated that many forms of load handling device 30 or service device 50 are known or are in development. The test station of the present invention can be used to develop, monitor, test, or diagnose faults in any such robotic device.

[0045] A first form of test station will now be described with reference to FIGS. 5 to 12.

[0046] Referring to FIG. 5 in a first aspect the test station 60 comprises one or more moving-bed 62 which is sized to accommodate a single robotic device 30.

[0047] One or more adjustable retaining arm 70 is provided to position the one or more robotic device on the moving bed 62.

[0048] Preferably the one or more moving-bed is sized to permit several robotic devices to be tested simultaneously.

[0049] In one aspect shown in FIG. 5, the moving-bed 62 comprises a movable belt which is moved by a pair of rotating rollers as is well known in the art. Movement of the belt moves either the first set of wheels 34, or the second set of wheels 36 of a robotic device depending on the orientation of the robotic device.

[0050] In use the first set of wheels 34 are tested as shown in FIG. 5 the robotic device is then rotated 90° with respect to the moving-bed 62 and the second set of wheels 36 are tested.

[0051] In another aspect shown in FIG. 9 the moving-bed 62 comprises a series of rollers 64 arranged to engage with the wheels of one or more robotic device.

[0052] In another aspect (not shown) two sets of rollers are provided. The first set are arranged to engage with the first set of wheels 34 and the second set are arranged to engage with the second set of wheels 36 of the robotic device either sequentially or simultaneously.

[0053] The rollers of the testing station can be moved anticlockwise, clockwise, stopped, started, braked, accelerated, raised, lowered, tilted or otherwise controlled by a controller (not shown) as is well known in the art, to move the wheels 34, 36 of the robotic device to simulate a variety of grid conditions without moving the robotic device.

[0054] The surface of the movable belt or the rollers of the testing station can be altered as is well known in the art, such as by way of example only using grease, grit, or oil to alter the friction between the moveable belt or rollers and the wheels 34, 36 of the robotic device to simulate spillages, slippages, jams, overshoots etc.

[0055] The size or surface of the moveable belt or rollers may be varied so as to include ridges, bumps or other forms of unevenness to simulate grid junctions or edges.

[0056] The separation of the rollers may be varied to provide a change in simulated surface.

[0057] In a preferred aspect the testing station is sized to accommodate a load handling device latched to a service device.

[0058] As shown in FIGS. 5 to 12 the testing station may be a self-contained unit. Alternatively the testing station may be attached to or within a grid structure.

[0059] The load handling devices to be tested are positioned in the testing station manually with or without the aid of lifting equipment 70.

[0060] In an alternative aspect (not shown) the testing station may be linked to an automated picking system or a robotic device storage area by rails 22 such that robotic devices can be conveyed to the testing station autonomously or by a service device.

[0061] In use the testing station can be used to test a robotic device before it is deployed on the grid of an automated picking system.

[0062] The testing station can also be used to design and develop new robotic devices.

[0063] The testing station can also be used to test a robotic device which has been retrieved manually, using a service handling device or otherwise from an automated picking system.

[0064] A robotic device may be retrieved from an automated picking system for a variety of reasons such as by way of example only for servicing, or cleaning, to test for signs of wear or because it is faulty.

[0065] The testing station can be used in a variety of testing protocols such as by way of example only:

[0066] Testing may comprise starting and stopping the robotic device wheels.

[0067] Testing may comprise moving the robotic device wheels in the X direction.

[0068] Testing may comprise moving the robotic device wheels in the Y direction.

[0069] Testing may comprise moving the robotic device in the Z direction.

[0070] Testing may comprise accelerating wheels of the robotic device.

[0071] Testing may comprise decelerating the wheels of the robotic device.

[0072] Testing may comprise moving the wheels at the same or at different speeds.

[0073] Testing may comprise moving the wheels in the same or in different directions.

[0074] Testing may comprise varying the surface of the rollers to simulate grid junctions, jams, overshoots, communications failure, e-stops or emergency stops or the like.

[0075] Testing may comprise analysing highly instrumented and with data connector to provide white box feedback of load handling device data.

[0076] Testing may further comprise performing one, any, some or all of the above tests either singly or repeatedly or in any combination thereof to simulate a variety of real life or exceptional grid conditions.