An ultrasonic doppler motion sensor device comprising transmitter means (10, 12) for emitting a continuous ultrasonic transmission signal in a detection space, ultrasonic receiver means (20, 22) for detecting the ultrasonic transmission signal reflected by the detection object as a receive signal, and mixer and detector means (14, 18) for mixing the ultrasonic transmission signal or a signal derived therefrom with the receive signal and/or for demodulating the receive signal and for generating a motion detection signal therefrom, wherein the mixer and detector means are assigned means (14) for the adjustable generation of a phase shift greater than 0 between a phase of the ultrasonic transmission signal and a periodic impulse signal at the mixer or detector means for scanning and mixing the receive signal.

An endpoint among a plurality of endpoints, synchronizes a clock across the plurality of endpoints. The endpoint generates a received ultrasonic signal by transducing ultrasonic sound received at a microphone from a spatial region. The ultrasonic sound includes an identical ultrasonic signal transmitted from the plurality of endpoints and echoes from the spatial region. The identical ultrasonic signal is generated with respect to the synchronized clock. The endpoint computes an error signal based on removing the identical ultrasonic signals and the echoes from the received ultrasonic signal. The endpoint detects motion in the spatial region based on a change in the error signal over time.

An endpoint among a plurality of endpoints, synchronizes a clock across the plurality of endpoints. The endpoint generates a received ultrasonic signal by transducing ultrasonic sound received at a microphone from a spatial region. The ultrasonic sound includes an identical ultrasonic signal transmitted from the plurality of endpoints and echoes from the spatial region. The identical ultrasonic signal is generated with respect to the synchronized clock. The endpoint computes an error signal based on removing the identical ultrasonic signals and the echoes from the received ultrasonic signal. The endpoint detects motion in the spatial region based on a change in the error signal over time.

A moving object detection device using an ultrasonic sensor, a method thereof, and a warning system using the same is provided. The moving object detection device includes: an ultrasonic sensor configured to receive a plurality of reflected signals per period; and a detector configured to divide a sensing distance of the ultrasonic sensor into a plurality of regions, detect a region of the plurality of regions as a region of interest (ROI) when an intensity of a reflected signal of the plurality of reflected signals exceeds a predetermined threshold in a region of the plurality of regions, and detect a moving object based on changes in the ROI.

A moving object detection device using an ultrasonic sensor, a method thereof, and a warning system using the same is provided. The moving object detection device includes: an ultrasonic sensor configured to receive a plurality of reflected signals per period; and a detector configured to divide a sensing distance of the ultrasonic sensor into a plurality of regions, detect a region of the plurality of regions as a region of interest (ROI) when an intensity of a reflected signal of the plurality of reflected signals exceeds a predetermined threshold in a region of the plurality of regions, and detect a moving object based on changes in the ROI.

A sonar method and assembly for detecting and/or determining the position and/or speed of objects underwater and/or on the water in a specified region. The orthogonality of Doppler-shifted transmission sequences is explored. First, a transmission sequence is generated, spread for some possible Doppler shifts and output via the transmission elements. If the transmission sequence is chosen carefully, the spread versions become orthogonal to each other and enable MIMO signal processing. If one of the assumed spreads matches the speed of the object, the spread is canceled out again to form the original transmission signal. This allows the binary detection of the presence of an object with the correlation of only one sequence and reduces the computing effort at the respective receivers enormously.

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.

Techniques are disclosed for systems and methods to provide remote sensing imagery for mobile structures. A remote sensing imagery system includes a remote sensing assembly with a housing mounted to a mobile structure and a coupled logic device. The logic device is configured to receive radar returns corresponding to a detected target from the radar assembly, determine a target radial speed corresponding to the detected target, determine an adaptive target speed threshold, and then generate remote sensor image data based on the remote sensor returns, the target radial speed, and the adaptive target speed threshold. Subsequent user input and/or the sensor data may be used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.

Breathing sensors, sensing methods, and vehicle occupant monitoring systems may employ ultrasonic transducers. One illustrative sensing method includes: sensing an acoustic transducer's responses to a series of acoustic bursts emitted in a vehicle's cabin; differencing pairs of said responses to obtain difference signals; converting the difference signals into magnitude signals; performing peak detection on each of the magnitude signals to obtain at least one peak amplitude; and providing a breathing signal based on the at least one peak amplitude. The breathing signal may be an occupancy detection flag, an occupant position, a breathing frequency, and/or any combination thereof.