Various implementations described herein are directed to a transducer array. The transducer array may include a first receiver having a first aperture width. The transducer array may include a second receiver having a second aperture width that is substantially equal to the first aperture width. The transducer array may also include a transceiver having a third aperture width that is larger than the first aperture width and the second aperture width.

A method for use in acoustic imaging, comprising: transmitting, from a transmitter, a first sound wave pulse at a first frequency determined by a maximum sampling rate of a receiver; transmitting at least one second sound wave pulse at a frequency substantially equal to the first frequency, the first and at least one second sound wave pulses being transmitted substantially within a fraction of a sample interval of the receiver; receiving and sampling, at the receiver, a reflection of at least two of the first and at least one second pulses to generate a set of receiver samples; and expanding the set of receiver samples, based on the first frequency and a total number of the first and at least one second pulses transmitted, to generate an expanded sample set with a larger number of samples than the set of receiver samples.

The invention relates to a method for detecting target echoes (11) in a reception signal (ES) of an ultrasonic sensor of a motor vehicle by providing a reference signal (RS) for decoding the reception signal (ES), wherein with respect to a multiplicity of predetermined frequency shift values in each case a correlation input signal (RS) is provided by shifting the reference signal (RS) in terms of its frequency by the respective frequency shift value; correlating the reception signal (ES) separately with each of the correlation input signals (RS) and thereby providing respective correlation output signals (KS1 to KS7), as the result of the respective correlation; and by providing a summation signal (SS) as the sum of the correlation output signals (KS1 to KS7), wherein on the basis of the summation signal (SS) one of the correlation output signals (KS1 to KS7) is selected and detecting the target echoes (11) is carried out by evaluating the selected correlation output signal (KS1 to KS7).

A field-programmable gate array (FPGA)-based real-time processing system applied to underwater acoustic positioning and realizing reconfigurability and multiple output is provided. The system includes a multi-interface control and command parsing module for automatically completing sample information transmission and command parsing; a finite-state machine (FSM) of sample management for calculating related data and completing splitting, flipping and writing of a sample; a parallel correlation processor group for completing, in parallel, high-performance processing operations regarding a plurality of targets; and a multiple output data former for simultaneously realizing data formation of a multiple output result and outputting a flag bit signal to the outside. A FPGA-based real-time processing control method is also provided that is applied to underwater acoustic positioning and realizing reconfigurability and multiple output. The system and the method are used, such that during a whole realization process, under multiple array elements and multiple targets, high-speed parallel correlation processing is realized, thereby solving problems in terms of real-time performance, universality and anti-noise performance, and effectively realizing high-performance correlation.

A device and method used to image conduits, such as pipes, wellbores and tubulars, with imaging sensors, such as cameras and ultrasound arrays. The speed and location of the device are determined using one or more speed sensor modules. Images are then registered to more precise axial locations along the conduit than are normally possible using wireline encoders or other methods. The conduit may be visualized to proper scale for improved analysis of defects.

A vehicular sensing system includes a first set of first sensors disposed at a first rear portion of a vehicle. The system includes a second set of second sensors disposed at a second rear portion of the vehicle that is above the first rear portion of the vehicle. A respective first field of sensing of at least one first sensor at least partially overlaps a respective second field of sensing of at least one second sensor. The system includes an electronic control unit (ECU) for processing sensor data to detect objects that are located within the at least partially overlapping fields of sensing of the at least one first sensor and the at least one second sensor. The vehicular sensing system, responsive to detecting the objects that are located within the at least partially overlapping fields of sensing, determines three-dimensional locations of the detected objects relative to the vehicle.

Embodiments of the present invention provide a navigation system which, on the one hand, is arranged on sides of the underwater vehicle/AUV and, on the other hand, includes a surface transmitter as a counterpart. The two units communicate with each other such that the surface transmitter emits its signal directed to the position of the underwater vehicle and/or that the surface transmitter follows the underwater vehicle to improve the position determination capability.

Embodiments of the present invention provide a navigation system which, on the one hand, is arranged on sides of the underwater vehicle/AUV and, on the other hand, includes a surface transmitter as a counterpart. The two units communicate with each other such that the surface transmitter emits its signal directed to the position of the underwater vehicle and/or that the surface transmitter follows the underwater vehicle to improve the position determination capability.

A method and an analysis system for determining a state of a diaphragm of an ultrasound sensor during operation is disclosed. The diaphragm of the ultrasound sensor is excited with a first excitation signal in a predefined first frequency profile. Based on this, a first voltage profile, which depends on a frequency of the first excitation signal, is measured. Analogously, a second voltage profile is determined by applying a second excitation signal to the diaphragm and then carrying out a measurement. These two voltage profiles are shifted so that respective positions of maxima of the two voltage profiles are matched to each other in a predefined frequency range. A third voltage profile, which runs between the shifted first and second voltage profiles, is determined. Based on the third voltage profile, electrical parameters are determined by a model for continuous excitation of the diaphragm to determine the state of the diaphragm.

A system includes a processor configured to access a train schedule to determine active train crossings along an original route, based on a predicted vehicle-arrival time at a given crossing. The processor is also configured to determine that a driver identity has an avoidance parameter associated therewith and determine a new route avoiding active train crossings, if possible, responsive to the avoidance parameter and determination of at least one active train crossing along the original route.