12 Ledgewood Drive, Smithtown, NY 11787

©2017 by DarkWater Acoustics

5163179637

Depth Reporting Optimized

“Next Gen 370” Adaptive Pinger

  • New US Patent Protected Features

  • Reports “resting” Depth

  • Optimized Detection Range

  • Optimizes Battery Life

  • Programmable features allow a multitude of operational conditions to be configured and tested

Depth Reporting

  • Knowing the “resting depth” of the device will significantly help in search effort

  • Depth will be sensed using a pressure transducer (may be similar to Omega PX2471)

  • Pressure will be converted to a depth code signal which can be reported in varying ways

    • Frequency modulation

    • Pulse code

Depth Reporting with a wide frequency range transducer (if available)

  • Ping can be shifted in frequency by some amount of Hz per Meter of depth (1hz per meter depth for example)

  • Frequency shift will be measured and converted to resting depth (repeatable 1kHz shift would mean the device is at 1000m depth)

  • Searches in areas with extreme depths can follow a more course frequency shift controlled by the adaptive features of the pinger

Depth Reporting with a Narrow frequency range transducer

  • Narrow frequency range piezo-electric acoustic transducers are available so the device would report depth in a pulse code

  • Two transducers would be part of the adaptive Pinger (10kHz and 37.5kHz)

  • Depth Pulse code could be similar to “Mode C Altitude” code on aircraft transponders

Depth Pulse Code

  • Depth pulse code would have dual function

  • Not only to be used for conversion to “resting depth” but will facilitate localization as well

  • Once the adaptive pinger detects it is at a “fixed depth” for some duration (24 hours for example) it will be assumed it is no longer moving and the depth sensing circuitry can be shut down to conserve battery power

  • The “fixed depth” reading will be reported by the pinger thereafter