US Patent 11222305 Instrumented item hook system

Items may be stored at an inventory location using an instrumented hook system. The instrumented hook system may include a hook from which items may be suspended. The hook may be affixed to a support arm using a weight sensor. The weight sensor provides weight data indicative of the weight of items suspended by the hook. The system may also include other sensors such as capacitive sensors, photodetectors, image sensors, and so forth. Sensor data from these sensors may be used to determine interaction data indicative of a quantity on hand, quantity picked, quantity placed, and so forth.