An ultrasonic target, including a main reflector, the main reflector including three main faces, extending from a main vertex, the main faces forming a main trirectangular trihedron; defining a main base plane, lying facing the main vertex, and forming a base of the main trirectangular trihedron; the target including at least one auxiliary reflector fastened to the main reflector, the or each auxiliary reflector including three auxiliary faces, extending from an auxiliary vertex, the auxiliary faces forming an auxiliary trirectangular trihedron; defining an auxiliary base plane, lying facing the auxiliary vertex, and forming a base of the auxiliary trirectangular trihedron.

The present invention relates to a vector sensor for measuring particle movement in a medium. The vector sensor comprises a magnetic body that is held at a certain distance from a magnetometer in such a way that the magnetic body can move in time with a passing particle movement, wherein the magnetometer is arranged to detect the oscillations in the magnetic field that the movements in the medium produce.

The embodiments of the present disclosure provide a method for a flow velocity detection. The method may include obtaining image data; determining, based on the image data, a parameter of at least one detection point, the parameter being related to a phase change; and determining a first flow velocity of the at least one detection point based on the parameter related to the phase change and a location relationship among the at least one detection point, at least one transmission point, and a plurality of receiving points.

The embodiments of the present disclosure provide a method for a flow velocity detection. The method may include obtaining image data; determining, based on the image data, a parameter of at least one detection point, the parameter being related to a phase change; and determining a first flow velocity of the at least one detection point based on the parameter related to the phase change and a location relationship among the at least one detection point, at least one transmission point, and a plurality of receiving points.

A sonar survey system including a multibeam echo sounder using plural transmit projectors and plural receive hydrophones, wherein beams with associated magnitudes are received such that the largest magnitude beam(s) are identified as characterizing beam(s) and data associated with these characterizing beam(s) is used as a compressed characterization of the ensonified space.

Apparatus and methods for velocity scanning in, e.g., bodies of water. In one embodiment, a scanned one-dimensional transducer array Doppler sonar arrangement is used to remotely measure both vertical and horizontal profiles of a river or channel along-stream water velocities within a cross-section of the river/channel from a single side-mounted sonar.

A survey system including a multibeam echo sounder having a projector array and a hydrophone array in a Mills Cross arrangement uses a multicomponent message to ensonify one or more fans to estimate a Doppler velocity.

A lighting system for a local vehicle, comprising: a head lamp including a low-beam lamp for shining low-beam light in a first zone, and a first high-beam lamp for shining first high-beam light in the first zone; a sensory cluster for detecting a remote vehicle proximate to the local vehicle, the sensory cluster including a distance sensor for determining a distance of the remote vehicle from the local vehicle, and a velocity sensor for determining a velocity of the remote vehicle with respect to the local vehicle; and a lighting controller for determining a minimum-distance target time when the remote vehicle will reach a minimum distance from the local vehicle based on the distance of the remote vehicle and the velocity of the remote vehicle, and for controlling the operation of the first high-beam lamp based on the distance of the remote vehicle and the velocity of the remote vehicle.

During transmission, a speed of sound pulses gradually reduces due to acoustic impedance. Regulating a length or a density or a sound speed of the sound pulses affects their average speed in the transmitting medium, sound intensity and detecting depth. Time of flight (TOF) and TOF shift can be used to calculate the depth and moving speed of detecting objects. Calculating a speed of moving objects by simultaneously detecting TOF shift at same site from two separated piezoelectric (PZT) elements improves the testing results with accuracy, simplification and reproducibility. Coding sound pulses to obtained the TOF and the TOF shift will simultaneously calculate the depth and the moving speed of sampling points, which can be used to construct 2D and 3D images for these motionless and/or moving sampling points. Coded sound pulses also improves the quality of the imaging.

During transmission, a speed of sound pulses gradually reduces due to acoustic impedance. Regulating a length or a density or a sound speed of the sound pulses affects their average speed in the transmitting medium, sound intensity and detecting depth. Time of flight (TOF) and TOF shift can be used to calculate the depth and moving speed of detecting objects. Calculating a speed of moving objects by simultaneously detecting TOF shift at same site from two separated piezoelectric (PZT) elements improves the testing results with accuracy, simplification and reproducibility. Coding sound pulses to obtained the TOF and the TOF shift will simultaneously calculate the depth and the moving speed of sampling points, which can be used to construct 2D and 3D images for these motionless and/or moving sampling points. Coded sound pulses also improves the quality of the imaging.