Arm-detecting overhead sensor for inventory system

Abstract

Inventory systems may include one or more sensors capable of detecting spatial positioning of inventory holders and an arm of a worker interacting with the inventory holder. Data can be received from a sensor, a gesture of the arm can be determined from the data, and a bin location or other information can be determined based on the gesture.

What is claimed is: 
     
         1 . A method comprising, under the control of one or more computer systems configured with executable instructions:
 receiving, at a computer system, an identification of an item for a storage operation, the storage operation including placement by a person of the item in an inventory holder having a plurality of bins;   receiving distance information from a sensor, the distance information including information about distances between the sensor and portions of objects within a field of vision of the sensor, the objects including an inventory holder and at least a portion of an arm of the person;   identifying distance information corresponding to the at least the portion of the arm of the person in association with the storage operation;   calculating a height of the at least the portion of the arm relative to the inventory holder based on the distance information corresponding to the at least the portion of the arm;   calculating a lateral position of the at least the portion of the arm relative to the inventory holder based on the distance information corresponding to the at least the portion of the arm;   associating the item with a bin on the inventory holder based on the calculated height and the calculated lateral position of the at least the portion of the arm relative to the inventory holder; and   causing an inventory module to be updated to reflect that the item is located at a location on the inventory holder corresponding to the bin associated with the item.   
     
     
         2 . The method of  claim 1 , wherein identifying distance information corresponding to the at least the portion of the arm of the person comprises identifying distance information at a time of interest. 
     
     
         3 . The method of  claim 2 , further comprising determining the time of interest in response to a gesture detected by the sensor. 
     
     
         4 . The method of  claim 3 , wherein the gesture comprises a portion of the arm passing a surface corresponding to a face of the inventory holder. 
     
     
         5 . The method of  claim 3 , wherein the gesture comprises an arrangement of fingers of a hand of the arm. 
     
     
         6 . The method of  claim 3 , wherein the gesture comprises a motion of the arm. 
     
     
         7 . The method of  claim 1 , further comprising determining a bin geometry of the inventory holder based on at least one of the distance information or stored characteristics of the inventory holder. 
     
     
         8 . A non-transitory computer-readable storage medium having stored therein instructions that, when executed by one or more processors of a computer system, cause the computer system to at least:
 receive data from a sensor, the data including information about a spatial position of an inventory holder and at least a portion of an arm of a person in proximity to the inventory holder;   determine a spatial position of the at least the portion of the arm during an interaction with the inventory holder;   identify a location on the inventory holder corresponding to the spatial position of the at least the portion of the arm during the interaction;   receive an identification of an item for a storage operation, the storage operation including placement by the person of the item into the location on the inventory holder; and   in response to the identifying the location on the inventory holder and receiving the identification of the item for the storage operation, update an inventory module to reflect that the item is in the location on the inventory holder.   
     
     
         9 . The non-transitory computer-readable storage medium of  claim 8 , wherein determining the spatial position of the at least the portion of the arm comprises determining a height of the at least the portion of the arm relative to the inventory holder, and wherein identifying the location on the inventory holder comprises identifying a shelf on the inventory holder corresponding to the height of the at least the portion of the arm. 
     
     
         10 . The non-transitory computer-readable storage medium of  claim 9 , wherein determining the spatial position of the at least the portion of the arm comprises determining a lateral position of the at least the portion of the arm relative to the inventory holder, and wherein identifying the location on the inventory holder comprises identifying a bin on the shelf of the inventory holder corresponding to the height and the lateral position of the at least the portion of the arm. 
     
     
         11 . The non-transitory computer-readable storage medium of  claim 8 , wherein the identification of the item for the storage operation is received in response to a scan of a barcode of the item. 
     
     
         12 . The non-transitory computer-readable storage medium of  claim 8 , wherein the instructions further cause the computer system to associate a different location from the identified location on the inventory holder with an empty bin based on a gesture identified via other data from the sensor. 
     
     
         13 . The non-transitory computer-readable storage medium of  claim 8 , wherein the instructions further cause the computer system to associate a different location from the identified location on the inventory holder with a bin containing damaged inventory based on a gesture identified via other data from the sensor. 
     
     
         14 . The non-transitory computer-readable storage medium of  claim 8 , wherein the instructions further cause the computer system to associate a different location from the identified location on the inventory holder with a bin missing inventory based on a gesture identified via other data from the sensor. 
     
     
         15 . An inventory management system comprising:
 an inventory holder;   a station comprising:
 a receiving zone configured to receive the inventory holder; 
 a sensor aimed at the receiving zone; and 
 one or more processors configured to:
 receive data from the sensor about objects in the receiving zone; 
 determine, based on the data, a spatial representation of datapoints in which each datapoint has a value indicative of a spatial position of an associated object detected by the sensor; 
 determine, based on the spatial representation, a subset of datapoints associated with at least a portion of an arm of a person; 
 determine a gesture based on the subset of datapoints associated with the at least the portion of the arm of the person; and 
 based on the gesture, update an inventory module to reflect that an identified item is located in a location on an inventory holder, the location on an inventory holder being indicated by the gesture. 
 
   
     
     
         16 . The system of  claim 15 , wherein the station further comprises a second sensor, wherein the first sensor is aimed at the receiving zone from above and the second sensor is aimed at the receiving zone from below. 
     
     
         17 . The system of  claim 15 , wherein one or more processors are further configured, in response to other data received from the sensor, to generate instructions to provide a confirmation or a negation of a condition, the gesture, or another gesture. 
     
     
         18 . The system of  claim 15 , wherein one or more processors are further configured, in response to other data received from the sensor, to generate instructions to associate or disassociate the gesture, another gesture, or an item with a bin of the inventory holder. 
     
     
         19 . The system of  claim 15 , wherein one or more processors are further configured, in response to other data received from the sensor, to generate instructions to allow or prevent movement of the inventory holder away from the receiving zone. 
     
     
         20 . The system of  claim 15 , wherein one or more processors are further configured, in response to other data received from the sensor, to generate instructions to request another inventory holder responsive to a determination that the inventory holder contains insufficient space to stow an item in the inventory holder.