US Patent 11135727 Autonomously acting robot that performs a greeting action

Empathy toward a robot is increased by the robot emulating human-like or animal-like behavior. A robot includes a movement determining unit that determines a direction of movement, an action determining unit that selects a gesture from multiple kinds of gesture, and a drive mechanism that executes a specified movement and gesture. When a user enters a hall, an external sensor installed in advance detects a return home, and notifies the robot via a server that the user has returned home. The robot heads to the hall, and welcomes the user home by performing a gesture indicating goodwill, such as sitting down and raising an arm.