Demonstration of AUV-Based Structural Acoustic Sonars for Underwater UXO Detection & Classification

00:06:12
https://www.youtube.com/watch?v=j3miQSJeNHU

摘要

TLDRThe video outlines the implementation of a sonar system on an autonomous underwater vehicle (AUV), designed by the Naval Research Laboratory. The system includes innovative low-noise receivers and a hull-mounted projector, with applications in detecting submerged and exposed targets. The AUV conducts pre-planned missions, collecting echo data and using navigation monuments for precise localization. Data is processed to display potential target positions, and classifications are made using color maps and algorithms with auxiliary expert input when necessary. The video illustrates the actual process of deployment, data collection, and recovery of the AUV.

心得

  • 🚢 The sonar is an innovative system developed by the Naval Research Laboratory.
  • 📡 It features low-noise receivers and a hull-mounted dual projector.
  • 📍 Navigation monuments are used for precise target localization.
  • 🤖 The AUV operates on pre-planned missions for data collection.
  • 🗂 Collected data is processed to produce target detection maps.
  • 🔍 Advanced classification algorithms interpret the sonar data.
  • 🎯 Localization assists in identifying unexploded ordnance.
  • 🧭 The system offers high-precision localization using sonar.
  • 🖼 Acoustic color maps are used for feature extraction.
  • 🔧 Deployment, data collection, and recovery are illustrated.

时间轴

  • 00:00:00 - 00:06:12

    The video discusses the implementation of structural acoustic sonar on an autonomous vehicle by the naval research laboratory. This involves low-noise receivers embedded in retractable wings and a dual projector for efficient data collection from the ocean sediment. The process includes launching the AUV, collecting echo data during pre-planned missions, and demonstrating the system's versatility with two sonar systems designed for different target detection scenarios. The AUV can be equipped with high precision localization by using navigation monuments, enhancing target localization accuracy. After data collection, processing involves creating detection maps with filters to help identify valid targets, followed by classification algorithms to determine probability of UXOs, aided by expert analyses and acoustic imaging.

思维导图

Mind Map

常见问题

  • What is the purpose of the structural acoustic downlook sonar?

    The sonar is designed for collecting echo data from ocean sediments to detect buried and proud targets.

  • Who developed the sonar system?

    The structural acoustic downlook sonar was developed by scientists and engineers at the Naval Research Laboratory.

  • What are the unique features of the sonar's design?

    It includes low-noise receivers embedded in retractable wings and a hull-mounted dual projector for uniform spatial and spectral properties.

  • How does the AUV deploy the sonar system?

    The AUV launches autonomously and follows a pre-planned mission to collect necessary data from the survey site.

  • What are lincol hat monuments?

    These are navigation markers placed on the seabed to help in precise target localization by the AUV sonar.

  • What is the purpose of acoustic color generation?

    It is used to analyze echo levels versus frequency and angle, aiding in the classification of detected objects.

  • How are targets classified in the sonar data processing?

    RVM classification algorithms use extracted features from acoustic data to output a call list with probabilities of being unexploded ordnance (UXO).

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  • 00:00:01
    in this video the projector and
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    receivers of the structural acoustic
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    downlook sonar are implemented on an
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    autonomous vehicle designed fabricated
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    and installed by scientists and
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    engineers at the naval research
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    laboratory the sonar has specially
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    designed low- noise receivers embedded
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    in two retractable wings and a whole
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    mounted dual projector having the
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    necessary uniform spatial and spectral
  • 00:00:27
    properties the overall methodology is
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    Illustrated in the
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    following at the survey site the auv
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    based sonar is launched and sent on its
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    autonomous pre-planned mission to
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    collect the necessary Echo data from the
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    ocean sediment an actual vehicle launch
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    and Recovery which we have now carried
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    out many times will be shown a bit
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    later as shown here we have designed two
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    complimentary structural acoustic sonars
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    the downlook system on the left has
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    source and wing receivers designed for
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    looking down into the settlement for
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    Buried and also proud targets and to do
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    so at modest coverage rates the side
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    look system on the right has a conformal
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    source and internal receiver array
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    designed to look at large distances for
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    proud and partially buried targets at
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    High coverage rates each sonar is
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    implemented on identical auv sections
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    which are easily substituted one for the
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    other and attached to the main sections
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    of the auv
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    in this example an optional High
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    Precision localization implementation is
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    shown where several navigation monuments
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    are placed on the settlement surface
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    spanning the area of Interest these
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    so-called lincol hat monuments are
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    easily detected and identified by the
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    auv sonar all subsequent Target
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    localization can be precisely referenced
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    with respect to these
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    monuments the data is then collected by
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    the auv executing autonomous pre-planned
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    flights over the contaminated site and
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    mow the grass patterns for downlook
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    sonar Prosecuting buried targets these
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    flights are typically separated by a
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    predetermined amount during the survey
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    design phase having collected the
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    necessary Echo data the auv is recovered
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    as shown in just a minute and the data
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    files offloaded for
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    processing the data is processed to
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    produce a detection display map showing
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    potential Target positions overlaid on a
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    2d view of the test area certain filters
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    are then applied such as one rejecting
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    proud targets one rejecting below
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    threshold snrs and others those
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    detections passed by the filters are
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    further processed to produce acoustic
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    color such as Echo levels versus
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    frequency and angle features are then
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    extracted from the color maps and
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    presented to pre-trained rvm
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    classification algorithms which then
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    output a call list along with relative
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    probabilities of being a
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    uxo the probable uxo detections are then
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    localized with respect to acoustic
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    monuments sparsely placed beforehand in
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    the testing field in some cases
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    auxiliary methods can also be applied
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    one which utilizes an expert who
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    compares the color maps with
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    preconstructed color templates for
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    typical uxo targets and another which
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    generates acoustic images which can
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    provide size shape and burial depths
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    we now show the auv video illustrating
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    deployment data collection and Recovery
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标签
  • sonar
  • autonomous vehicle
  • acoustic
  • ocean surveying
  • data processing
  • target detection
  • Naval Research Laboratory
  • UXO classification