A living object detection system may detect the interaction between an observer and a target object. The system may include an object sensor device, an object classification data unit, and an object detection module. The object sensor device may be attachable to the observer and include an ultrasonic sensor for sensing distance and a passive infrared sensor for sensing temperature. The object classification data unit may store predetermined object classifiers that identifies an object as a living object or non-living object. The object detection module may determine the target object as a living object or a non-living object based on the object classifiers stored in the object classification data unit and on a physical feature set of the target object, where the physical feature set may include distance and temperature parameters.

An ultrasonic testing device includes: a signal acquiring unit which receives a reflected echo signal relating to a reflected echo of ultrasonic waves from an object being inspected, a defect detecting unit which detects a defect of the object being inspected on the basis of the reflected echo signal, and a display unit which displays the detection result of the defect detecting unit. The defect detecting unit uses the maximum signal strength of the reflected echo signal exceeding a first threshold value to detect the defect. The first threshold value is a value with which the signal strength is less than the maximum signal strength of the reflected echo signal from the surface of the object, using as an evaluation range an interval between a position which is positioned a first distance from the surface of the object and a bottom surface of the object.

A method for detecting presence of a person includes emitting, by a speaker of a device, a plurality of ultrasonic ping signals, receiving, by a microphone of the device, a plurality of reflected ultrasonic ping signals, and processing the received reflected signals to determine a presence of a person within a predetermined distance of the device. The processing includes determining changes in the reflected signals relative to the emitted signals by generating an impulse response by cross-correlating the received signals and the emitted signals, averaging the cross-correlated impulse response over a set time period, and generating a detection signal by subtracting the averaged cross-correlated impulse response from an instantaneous impulse response, applying a time gating function to select a portion of the detection signal corresponding to the reflected signal from the predetermined distance from the device, and applying gain compensation to the time gated detection signal to compensate signal falloff.

A method for controlling a sound box, includes: in response to the sound box being in a standby state, emitting an ultrasonic signal, and receiving a reflected ultrasonic signal reflected by an external object; acquiring a moving trajectory of the external object according to the reflected ultrasonic signal; and determining a target operation instruction to be executed according to the moving trajectory of the external object.

An electronic device (1) such as a cell phone, or a proximity detector for an electronic device (1), has an ultrasound transmitter (5), an ultrasound receiver (6), and a processing system. It transmits an ultrasonic sine-wave signal from the transmitter (5), and receives the ultrasonic sine-wave signal, through air, at the receiver (6). It detects when the frequency of the transmitted signal and a frequency of the received signal satisfy a predetermined difference criterion, and uses this to determine whether to disable or enable a touch or touchless input (2) on the device (1).

An ultrasonic transceiver can detect the presence of nearby moving objects while rejecting signals from stationary targets and from transmitter signal feedthrough. Data corresponding to received ultrasound signals are stored in a digital memory. For each sample in a measurement, a difference is calculated between corresponding samples in the stored data corresponding to received signals for current and previous measurements to estimate a time of flight to a moving object.

An object detection device includes a transmitting unit that transmits a transmission wave, a receiving unit that receives a reception wave produced by the reflection of the transmission wave off an object, a CFAR processing unit that acquires a difference value between a processing target value that is the value of a processing target signal corresponding to the reception wave received at a certain detection timing, and a reference value based on a moving average value of the values of reference signal groups corresponding to the reception wave received during predetermined periods before and after the detection timing, a detection processing unit that generates information about the object, based on the difference value, and a setting unit that selects the reference value suitable for a detection distance corresponding to the detection timing from a plurality of the reference values.

The present invention relates to a method for computational noise compensation for an ultrasonic sensor system (1) that is mounted in a concealed manner, in particular for a vehicle with a wall material (2), including the following steps: detecting reference surroundings information (100) comprising noise signal information (3) relating to a wall material (2) and/or airborne sound signal information (4), using an ultrasonic sensor (5) of the ultrasonic sensor system (1); storing the reference surroundings information (200); detecting real-time surroundings information (300) comprising noise signal information (3) relating to the wall material (2) and/or airborne sound signal information (4), using the ultrasonic sensor (5); and forming a difference signal between the pieces of surroundings information (400) of reference surroundings information and real-time surroundings information, using a computational unit (6). The present invention also relates to a system for computational ultrasound compensation having means for performing the steps of the method. The present invention further relates to a vehicle having the system for computational ultrasound compensation. The present invention furthermore relates to a computer program, to a data carrier signal, and to a computer-readable medium.

The present invention relates to a system for monitoring user presence relative to an electronic device, and related method and computer implemented software. The electronic device including at least one acoustic transducer being configured to operate within the ultrasonic range, the least one acoustic transducer being configured to detect a user presence within a predetermined range from the device, wherein the system is configured to turn the at least one transducer off for a predetermined first time period after the detection of a user, at the end of said first time period, activating the acoustic transducer for detecting the user presence.

An electronic device (1) such as a cell phone, or a proximity detector for an electronic device (1), has an ultrasound transmitter (5), an ultrasound receiver (6), and a processing system. It transmits an ultrasonic sine-wave signal from the transmitter (5), and receives the ultrasonic sine-wave signal, through air, at the receiver (6). It detects when the frequency of the transmitted signal and a frequency of the received signal satisfy a predetermined difference criterion, and uses this to determine whether to disable or enable a touch or touchless input (2) on the device (1).