摘要:
The invention relates to a method for evaluating multiple received signals (6, 8, 11), wherein the method has the following steps:
sending a transmission signal (3) receiving a first signal (6), which contains the transmission signal via a first receiver (5) and receiving a second signal (8), which contains the transmission signal via a second receiver (7), characterized in that to evaluate the received signals (6, 8), the received signals (6, 8) are compared with one another, wherein the comparison comprises determination of a time difference and/or phase difference between the first signal (6) and the second signal (8).
摘要:
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.
摘要:
Provided are a sonar system and transducer assembly for producing a 3D image of an underwater environment. The sonar system may include a housing having a transmit transducer that may transmit sonar pulses into the water. The system may include at least one sidescan transducer array in the housing that receives first and second sonar returns with first and second transducer elements and converts the first and second returns into first and second sonar return data. The first sidescan element may also transmit second sonar pulses, and at least one of the sidescan elements may receive the second sonar pulses to generate sidescan sonar return data. A sonar signal processor may then generate a 3D mesh data and sidescan image data and generate a 3D image data based on the 3D mesh data and sidescan image data. An associated method of using the sonar system is also provided.
摘要:
Techniques are disclosed for systems and methods to provide accurate and reliable compact sonar systems for mobile structures. A sonar system includes multiple sensor channels, each comprising a sonar transmitter and a sonar receiver, and a logic device configured to provide control signals and receive sensor signals from the sensor channels. The logic device is configured to provide transmission signals to sonar transducer assemblies, where signal patterns of the transmission signals are differentiated based at least in part on frequency content. Acoustic returns are processed using the signal patterns to reduce inter-channel pickup between the sensor channels. Resulting sonar data and/or imagery may be displayed to a user and/or used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.
摘要:
A robot cleaner having a main body, a driving unit for moving the main body, a sensing unit for sensing information related to an obstacle, and a controller for controlling the driving unit to prevent collision of the main body with the obstacle. The controller controls the driving unit to reverse the main body with respect to the obstacle so as to prevent the main body from contacting the obstacle based on a distance between the main body and the obstacle.
摘要:
Provided are a sonar system and transducer assembly for producing a 3D image of an underwater environment. The sonar system may include a housing mountable to a watercraft having at least one transducer array. The transducer array may include a transmit/receive element configured to transmit sonar pulses and a second transducer element. The transmit/receive element and the second transducer element may receive first and second sonar returns convert the first and second returns into first and second sonar return data. A sonar signal processor may then generate a 3D mesh data using the first and second sonar return data and at least a predetermined distance between the transducer elements. An associated method of using the sonar system is also provided.
摘要:
Provided are a method, apparatus, and computer program product for updating stored 3D mesh data from live 3D mesh data. The method may include processing, by a sonar signal processor, first sonar return data and second sonar return data from first and second transducer elements of at least one transducer array to generate live 3D mesh data. The method may include determining a position associated with the live 3D mesh data that corresponds to the position of the watercraft when the first sonar return data and the second sonar return data was received, and may include updating a stored 3D mesh data with at least a portion of the live 3D mesh data based on the position.
摘要:
A plurality of lasers produces a lattice of projected points. A sensor system detects movement in the projected points in response to an incoming wave.
摘要:
A scene is reconstructed by transmitting pulses into a scene from an array of transmitters so that only one pulse is transmitted by one transmitter at any one time. The one pulse is reflection by the scene and received as a set of signals. Each signal is sampled and decomposed to produce frequency coefficients stacked in a set of linear systems modeling a reflectivity of the scene. Then, a reconstruction method is applied to the set of linear systems. The reconstruction method solves each linear system separately to obtain corresponding solutions, which are shared and combined to reconstruct the scene.
摘要:
The target searching device includes: a sound source which transmits a sound wave into a propagation space; a transducer array placed in an area to receive a forward scattering wave which scatters forward from the target within the propagation space; a subtraction processing device which subtracts a traveling wave directly traveling towards the transducer array from a mixed wave of the forward scattering wave and the traveling wave so as to separate the forward scattering wave; a passive-phase conjugate processing device which performs passive-phase conjugate processing on the forward scattering wave separated by the subtraction processing device so as to generate a passive-phase conjugated signal of the forward scattering wave; an autocorrelation processing device which performs autocorrelation processing on the traveling wave to generate an autocorrelation processed signal of the traveling wave; and a correlation device which judges a similarity between the autocorrelation processed signal and the passive-phase conjugated signal.