An appliance includes a user presence detector having an emitter and a sensor. The emitter is configured to emit waves having a wavelength, and the sensor is configured to sense waves of the wavelength, such as emitted waves which have been reflected back to the sensor from an object external to the appliance. There is no internal path within the appliance between the sensor and the emitter for either direct or reflected waves. The appliance also includes a user interface panel and a user input device. The user interface panel and the user input device are offset along at least one direction. The sensor is positioned on one of the user interface panel or the user input device and the emitter is positioned on the other of the user interface panel or the user input device.

A robotic device including one or more proximity sensing systems coupled to various portions of a robot body. The proximity sensing systems detect a distance of an object about the robot body and the robotic device reacts based on the detected distance. The proximity sensing systems obtain a three-dimensional (3D) profile of the object to determine a category of the object. The distance of the object is detected multiple times in a sequence to determine a movement path of the object.

An apparatus for collision avoidance by surface proximity detection includes a plurality of piezoelectric elements disposed adjacent to a surface of an object, a memory storing instructions, and at least one processor configured to execute the instructions to control a first one among the piezoelectric elements to generate an acoustic wave along the surface of the object, and receive, via a second one among the piezoelectric elements, an acoustic wave signal corresponding to the generated acoustic wave. The at least one processor is further configured to execute the instructions to filter the received acoustic wave signal, using a band-pass filter for reducing noise of the received acoustic wave signal, obtain a proximity signal for proximity detection, from the filtered acoustic wave signal, using a linear time-invariant filter, and detect whether an obstacle is proximate to the surface of the object by inputting the obtained proximity signal into a neural network.

An apparatus for collision avoidance by surface proximity detection includes a plurality of piezoelectric elements disposed adjacent to a surface of an object, a memory storing instructions, and at least one processor configured to execute the instructions to control a first one among the piezoelectric elements to generate an acoustic wave along the surface of the object, and receive, via a second one among the piezoelectric elements, an acoustic wave signal corresponding to the generated acoustic wave. The at least one processor is further configured to execute the instructions to filter the received acoustic wave signal, using a band-pass filter for reducing noise of the received acoustic wave signal, obtain a proximity signal for proximity detection, from the filtered acoustic wave signal, using a linear time-invariant filter, and detect whether an obstacle is proximate to the surface of the object by inputting the obtained proximity signal into a neural network.

An intelligent sensing ball launcher is provided, including a housing, a ball-launching wheel, a driver, a processor, and a first sensor. The housing is provided with a ball entry port, a ball-launching port, and a slideway. The ball-launching wheel is disposed inside the housing, extends partially into the slideway, and configured to launch a ball passing through the slideway from the ball-launching port. The processor is electrically connected to the driver and configured to control a switching of the driver to drive the ball-launching wheel to rotate. The first sensor is disposed on the housing, electrically connected to the processor, and configured to sense whether or not a person or an animal is approaching. When sensing the person or the animal is approaching, the first sensor feeds back information to the processor, and then the processor controls the driver to operate to drive the ball-launching wheel to rotate.

A robot system for human-robot collaboration is disclosed that includes one or more proximity sensing elements disposed on the movable parts of the robot, joint position sensing sensors, and a safety control module connects the proximity sensing element and joint position sensing sensors and monitors the speed of the robot and the proximity distance to the objects and stop the robot safely when speed exceed the set limit. The safety control module switches the safety status of the robot when a set proximity distance threshold is triggered. Then, multiple embodiments of the safety status triggered by proximity sensing are introduced for different processes of the human-robot collaboration, includes separation monitoring, force limiting for bumping, and manipulation of the robot. Furthermore, embodiments of utilizing different types of sensors to implement the proximity sensing elements are also disclosed.