An ultrasonic sensor includes an ultrasonic transceiver that transmits and receives an ultrasonic wave, and that outputs a reception signal by receiving the ultrasonic wave, and a position detection unit that detects a position of a target facing the ultrasonic transceiver, based on the reception signal. A plurality of the ultrasonic transceivers are arranged along a first direction. The position detection unit detects inclination of the target with respect to the first direction, based on the reception signals output from a plurality of the ultrasonic transceivers.

A stylus is provided, which includes a core body, an electrode disposed adjacent to the core body, a transmitter that sends a downlink signal including switch information SW1 using the electrode, and a controller that determines whether the stylus is in contact state with an operating surface or the stylus is in hover state. In the contact state, the controller controls the transmitter to send the switch information SW1 at a first bit rate. In the hover state, the controller controls the transmitter to send the switch information SW1 at a second bit rate smaller than the first bit rate. A technical advantage includes lowering the possibility of a failure to receive downlink signals when the stylus is in hover state, even though the stylus sends the downlink signals with the same intensity as when the stylus is in contact state.

The electronic equipment includes a display, an ultrasound emitter, an ultrasound receiver, and a processor. The ultrasound emitter can be adapted to emit a first ultrasound signal into at least a space the display faces. The ultrasound receiver can be adapted to receive a second ultrasound signal. The second ultrasound signal is an echo of the first ultrasound signal reflected by an object. The processor can be connected respectively to the ultrasound emitter and the ultrasound receiver. The processor can be adapted to acquire a floating touch signal by locating the object in three-dimensional space according to charactering information charactering the first ultrasound signal and the second ultrasound signal, and execute an instruction corresponding to the floating touch signal.

The electronic equipment includes a display, an ultrasound emitter, an ultrasound receiver, and a processor. The ultrasound emitter can be adapted to emit a first ultrasound signal into at least a space the display faces. The ultrasound receiver can be adapted to receive a second ultrasound signal. The second ultrasound signal is an echo of the first ultrasound signal reflected by an object. The processor can be connected respectively to the ultrasound emitter and the ultrasound receiver. The processor can be adapted to acquire a floating touch signal by locating the object in three-dimensional space according to charactering information charactering the first ultrasound signal and the second ultrasound signal, and execute an instruction corresponding to the floating touch signal.

Systems and methods are disclosed in which a playback device transmits a first sound signal including a predetermined waveform. In one example, the playback device receives a second sound signal including at least one reflection of the first sound signal. The second sound signal is processed to determine a location of a person relative to the playback device, and a characteristic of audio reproduction by the playback device is selected, based on the determined location of the person.

A system for detecting objects using ultrasonic waves and methods for making and using the same are provided. The object detection system uniquely encodes each of a plurality of ultrasonic waves and transmit each of the uniquely-encoded ultrasonic waves in a respective direction. The object detection system then receives any of the emitted uniquely-encoded ultrasonic waves that are reflected from an object. By decoding the reflected ultrasonic waves, the object detection system distinguishes among the uniquely-encoded ultrasonic waves and detect the existence and location of the object.

A system for detecting objects using ultrasonic waves and methods for making and using the same are provided. The object detection system uniquely encodes each of a plurality of ultrasonic waves and transmit each of the uniquely-encoded ultrasonic waves in a respective direction. The object detection system then receives any of the emitted uniquely-encoded ultrasonic waves that are reflected from an object. By decoding the reflected ultrasonic waves, the object detection system distinguishes among the uniquely-encoded ultrasonic waves and detect the existence and location of the object.

Systems and methods for performing operations based on acoustic locationing are described. An example device includes one or more microphones configured to sense sound waves propagating in an environment. The example device also includes one or more processors and one or more memories coupled to the one or more processors. The one or more memories store instructions that, when executed by the one or more processors, cause the device to recover sound wave information from the sensed sound waves, detect a presence of one or more persons in the environment based on the received sound wave information, determine an operation to be performed by one or more smart devices based on the detected presence of one or more persons, and instruct the one or more smart devices to perform the operation.

A system for aiding a user in at least one of welding, cutting, joining, and cladding operations is provided. The system includes a welding tool and a welding helmet with a face-mounted display. The system also includes a spatial tracker configured to track the welding helmet and the welding tool in 3-D space relative to an object to be worked on. A processor based subsystem is configured to generate virtual objects based on objects found in a welding environment and transmit the virtual objects to a predetermined location on the face-mounted display.

A system for aiding a user in at least one of welding, cutting, joining, and cladding operations is provided. The system includes a welding tool and a welding helmet with a face-mounted display. The system also includes a spatial tracker configured to track the welding helmet and the welding tool in 3-D space relative to an object to be worked on. A processor based subsystem is configured to generate virtual objects based on objects found in a welding environment and transmit the virtual objects to a predetermined location on the face-mounted display.