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To promote awareness, understanding, advancement and application of ocean engineering and marine technology. This includes all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.
Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies
2019 IEEE International Conference on Industrial Technology (ICIT)
The scope of the conference will cover, but will not be limited to, the following topics: Robotics; Mechatronics; Industrial Automation; Autonomous Systems; Sensing and artificial perception, Actuators and Micro-nanotechnology; Signal/Image Processing and Computational Intelligence; Control Systems; Electronic System on Chip and Embedded Control; Electric Transportation; Power Electronics; Electric Machines and Drives; Renewable Energy and Smart Grid; Data and Software Engineering, Communication; Networking and Industrial Informatics.
The conference covers all aspects of the technology associated with ultrasound generation and detection and their applications.
2019 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)
CVPR is the premier annual computer vision event comprising the main conference and severalco-located workshops and short courses. With its high quality and low cost, it provides anexceptional value for students, academics and industry researchers.
The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...
IEEE Computer Graphics and Applications (CG&A) bridges the theory and practice of computer graphics. From specific algorithms to full system implementations, CG&A offers a strong combination of peer-reviewed feature articles and refereed departments, including news and product announcements. Special Applications sidebars relate research stories to commercial development. Cover stories focus on creative applications of the technology by an artist or ...
Publishes original and significant contributions relating to the theory, design, performance and reliability of electron devices, including optoelectronics devices, nanoscale devices, solid-state devices, integrated electronic devices, energy sources, power devices, displays, sensors, electro-mechanical devices, quantum devices and electron tubes.
2017 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), 2017
Reverberation is the main interference in active sonar detection, due to its special properties, reverberation suppression is a difficult problem in active sonar signal processing. In this paper, the method of reverberation suppression is studied, and a new method based on the normalization of the beam space data is proposed. The basic idea of this method is to normalize the ...
IEE Colloquium on Simulation Techniques Applied to Sonar, 1988
2014 Oceans - St. John's, 2014
The reverberation suppression is the foundation of target detection in diver detection sonar. The reverberation caused by the sea bottom is generally strong. Conventional methods with only amplitude cannot remove these reverberations completely because of the random temporal fluctuation of the signal amplitude, which causes false alarms especially in the small target detection. Spatiotemporal stability derived from the variance of ...
2011 Second International Conference on Mechanic Automation and Control Engineering, 2011
The surveillance and inspection of underwater pipelines are carried out by operators who drive a remotely operated underwater vehicle (ROV) with camera mounted on it. However in very turbid water, the camera can not capture any scene, even with auxiliary high-intensity light. In this case the optical detection devices are unable to complete the surveillance task In recent years, forward ...
2014 IEEE/OES Autonomous Underwater Vehicles (AUV), 2014
Interferometrie Synthetic Aperture Sonar (InSAS) delivers ultra-high range independent image resolution with 3D seabed bathymetry at higher Area Coverage Rates (ACRs) and resolution than can be achieved with traditional physical aperture limited sidescan sonar. The along track resolution is achieved by synthesising the required aperture length by moving a physical aperture while sampling the field of view. The result is ...
Reverberation is the main interference in active sonar detection, due to its special properties, reverberation suppression is a difficult problem in active sonar signal processing. In this paper, the method of reverberation suppression is studied, and a new method based on the normalization of the beam space data is proposed. The basic idea of this method is to normalize the time waveform of the beam space, and then carry out the subsequent matched filtering and port-starboard discrimination. This method can reduce CFAR detection probability under reverberation background, remove the interference of own ship, and does not affect the performance of the subsequent signal processing, compared with the method of normalization after matched filtering, this algorithm has low false alarm probability and engineering practicability, Shallow sea experimental data of active towed array show that the method is effective.
The reverberation suppression is the foundation of target detection in diver detection sonar. The reverberation caused by the sea bottom is generally strong. Conventional methods with only amplitude cannot remove these reverberations completely because of the random temporal fluctuation of the signal amplitude, which causes false alarms especially in the small target detection. Spatiotemporal stability derived from the variance of phase difference which is independent from the amplitude has been adopt to the reverberation suppression for narrow band signals in diver detection sonar systems, which are more complicated in wide band sonar. Wideband signals have the predominance of narrow band signals, because of the better resolution in range and azimuth. To access the high resolution and low false alarm simultaneously, the reverberation suppression combining amplitude with phase difference in wide band diver detection sonar needs to be achieved. So this paper proposed an improved method to suppression the reverberation for the wideband sonar system. The spatiotemporal stability estimation is proposed to be achieved based on the wavelet cross spectrum after wideband split-beam forming. The estimation algorithm in the wavelet domain is discussed. And the experiment results are given at last.
The surveillance and inspection of underwater pipelines are carried out by operators who drive a remotely operated underwater vehicle (ROV) with camera mounted on it. However in very turbid water, the camera can not capture any scene, even with auxiliary high-intensity light. In this case the optical detection devices are unable to complete the surveillance task In recent years, forward looking sonar is widely applied to the underwater inspection, which is not subject to the influence of light and turbidity. So it is suitable for the inspection of pipelines. But the dynamic change of ROV by the water flow will lead to the target to escape from the sonar image easily. In addition, the sonar image is with high noise and low contrast. It is difficult for the operator to identify the pipeline from the images. Moreover, the surveillance of underwater pipelines is tedious and time consuming and it is easy to make mistakes due to the fatigue and distraction of the operator. Therefore, the study focuses on developing image processing algorithms to detect the pipeline automatically. By using the proposed image processing method, firstly the images are enhanced using the Gabor filter. And then these images are applied for an edge detector. Finally the parameters of the pipeline are calculated by Hough transform. To reduce the search area, the Kalman filter is explored to predict the parameters of the pipeline on the next image. And the experiment is shown the vision system is available to the surveillance of underwater pipelines.
Interferometrie Synthetic Aperture Sonar (InSAS) delivers ultra-high range independent image resolution with 3D seabed bathymetry at higher Area Coverage Rates (ACRs) and resolution than can be achieved with traditional physical aperture limited sidescan sonar. The along track resolution is achieved by synthesising the required aperture length by moving a physical aperture while sampling the field of view. The result is a compact power efficient solution ideally suited for use on Autonomous Underwater Vehicles (AUV) and towed platforms. This paper will discuss the advantages of SAS as a tool for search and survey applications, including a detailed analysis of the processing and data handling workflow. Example workflow steps include SAS processing (image and bathymetry formation), georeferencing, mosaicing, data formatting, map generation, data storage, data recovery and data visualization. In August 2014, Kraken Sonar Systems participated in the Victoria Strait Expedition to search for the missing ships from Sir John Franklin's doomed Arctic expedition. The expedition team used a variety of sonar survey tools, including a Kraken InSAS system, installed onboard the Arctic Explorer AUV owned by Defense Research and Development Canada (DRDC). Results from the search will be presented, as well as a discussion of the application of AUVs for high-arctic seabed survey.
The covertness of an active sonar is a very important issue and the sonar signal waveform design problem is studied to improve covertness of the system. Many marine mammals produce call pulses for communication and echolocation, and existing interception systems normally classify these biological signals as ocean noise and filter them out. Based on this, a disguised sonar signal waveform design approach with its camouflage application strategy for underwater sensor platforms is proposed by utilizing bio-inspired steganography. We first construct bionic sonar signal waveforms which are very close to the true whale whistle, and then embed these constructed bionic sonar signal waveforms into the true whale call trains to hide the real sonar signal waveforms. According to the time-frequency structure of the true whale whistle, a bionic sonar signal model is established to generate the proposed sonar signal waveforms. A single sonar signal is used to measure the range of the target and a combination of two sonar signals is utilized for measuring its speed. A high-performance range and speed measurement algorithm is deduced in detail. Based on the constructed signal waveforms and the characteristics of false killer whale call trains, a camouflage application strategy is designed to improve the camouflage ability of the sonar signal sequence. Finally, simulation results are provided to verify the performance of the proposed method.
Image matching technology is an important part of image processing technology. In this paper, the normal distributions transform (NDT) image matching algorithm and its application in the sonar image processing is studied. The NDT algorithm is based on a probability model. It calculates the coordinate of the image of the target point instead of the grey value, and this speeds up the sonar image matching process. Previously, before image matching was available, per-processing of the sonar image was necessary. The research of pre-processing of sonar imaging concerns noise reduction and image segmentation of the sonar image. Several classical methods of sonar image noise reduction are studied. The advantages and disadvantages of each method are analyzed. Based on a kind of DSP chip, the NDT image matching algorithm is achieved.
Ocean ambient noise is usually considered as an interfering background for underwater devices. As a key component of ocean ambient noise, marine biological noise also has a serious effect on sonar detection performance. It is found that marine mammal noise has a wide frequency band, with the energy mainly concentrating on low frequency band 10 ~ 500 Hz and medium frequency band 500 Hz ~ 25 kHz, which therefore significantly increases ocean ambient noise. The influence of marine biological noise on sonar detection is simulated with a RAM transmission model. Simulation results reveal that marine mammal noise brings about a drop of the detection range of surface targets from 25 km to 2~10 km. Moreover, the source levels of false killer whales, bottlenose dolphins and sperm whales are all very high, and can propagate over long distances. The frequency band and time duration of these marine mammal noises resemble an active sonar signal, which would result in a higher false alarm rate.
Multistatic sonar has the characteristics of traditional passive and active sonar, including good concealment performance, strong anti-interference ability, far-distance reaction, high positioning accuracy, the advantages of easy-to-optimization design, etc. Multistatic sonar will be the important direction for future development of active sonar. About the scattering characteristics of multistatic sonar targets, this paper establishes a bistatic sonar scattering model with ellipsoidal targets as an example. The variation of the target intensity with the incident angle is calculated under the condition of bistatic sonar. The concept of the equivalent incident angle is introduced to calculate the variation of the target intensity with it, and analyze the scattering characteristics. All the results provide theoretical basis for the underwater targets positioning, detection and identification by the multistatic sonar system.
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Senior Underwater Acoustics Engineer - SEAL
Georgia Tech Research Institute (GTRI)