Acoustic inspection productivity can be enhanced using techniques to perform compression of acquired acoustic data, such as data corresponding to elementary A-scan or other time-series representations of received acoustic echo data. In various approaches described herein, time-series data can be decimated for efficient storage or transmission. A representation of the time-series data can be reconstructed, such as by using a Fourier transform-based up-sampling technique or a convolutional interpolation filter, as illustrative examples. The techniques described herein can be used for a variety of different acoustic measurement techniques that involve acquisition of time-series data (e.g., A-Scan data). Such techniques include Full Matrix Capture (FMC) applications, plane wave imaging (PWI), or PAUT, as illustrative examples.

A survey system including a multibeam echo sounder having a single projector array and a single hydrophone array constructs a multi-signal message and deconstructs a corresponding multi-signal echo to substantially simultaneously perform multiple survey missions.

A target object detection device is provided. The device includes a signal processor, a display unit, and a controller. The signal processor receives a reception signal generated based on an echo of an ultrasonic wave from a target object and generates echo data corresponding to a distance from a transmission source of the ultrasonic wave to the target object every time the ultrasonic wave is transmitted. The display unit has a display screen with a first side and a second side that is turnable in an axial direction perpendicular to the display screen, and displays an image on the display screen based on the echo data. The controller sets a range with respect to time at which the ultrasonic wave is transmitted, and outputs the echo data corresponding to the ultrasonic wave within the time range according to turning of the display screen.

A target object detection device is provided. The device includes a signal processor, a display unit, and a controller. The signal processor receives a reception signal generated based on an echo of an ultrasonic wave from a target object and generates echo data corresponding to a distance from a transmission source of the ultrasonic wave to the target object every time the ultrasonic wave is transmitted. The display unit has a display screen with a first side and a second side that is turnable in an axial direction perpendicular to the display screen, and displays an image on the display screen based on the echo data. The controller sets a range with respect to time at which the ultrasonic wave is transmitted, and outputs the echo data corresponding to the ultrasonic wave within the time range according to turning of the display screen.

A sonar system and method for measuring relative velocity between a transducer and a scattering surface or volume is disclosed. The system utilizes phased array or piston transducers that project acoustic beams in different directions. Each projection consists of multiple sub-waveforms of different center frequencies that are either frequency steered into different directions such that the acoustic beams ensonify different scatterers or sufficiently separated in frequency to obtain independent estimates of velocity. Each received return signal is used to estimate an independent relative velocity between the transducer and scatterers, and the estimated velocities are averaged to reduce the single-ping standard deviation of the velocity error. Different lags may be used in the different sub-waveforms, wherein shorter lags are used to ambiguity resolve longer lags such that the system ambiguity velocity is sufficiently high, and the single-ping variance decreases below what would be possible when only using a short lag.

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.

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.

A survey system including a transmitter, receiver, projector array and hydrophone array transmits and receives sound waves to perform one or more survey missions.

A survey system including a transmitter, receiver, projector array and hydrophone array transmits and receives sound waves to perform one or more survey missions.

A survey system including a transmitter, receiver, projector array and hydrophone array transmits and receives sound waves to perform one or more survey missions.