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Microcontroller Driven Miniaturized Digital Depth Sounder

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Abstract:

A novel miniaturized autonomous digital depth sounder MADDSa was developed for automatic storing and recording of sea bottom depth, along with communication to various marine equipment, like chart plotter, GPS and radar, using NMEA 0183 protocol. The analog part of the sounder consists of the miniature HEXFET transmitter and the one chip double opamp receiver. The digital part constitutes the PIC microcontroller, with a builtin analog-to-digital converter (ADC) and universal asynchronous transmitter (UART). Such architecture allows sampling and storing the echo in compressed form in PIC's RAM memory. The UART allows transmission of the data acquired by the sounder between successive pings, via the serial line. The dedicated software of the sounder consists of two parts: one hard-coded in the microcontroller EEPROM memory and the other running on attached equipment. The first one uses unique features of the microcontroller, which allows real-time compression of acquired echo data, implementation of bottom tracking algorithms and communication with host computer. The second one in general is used for presentation of echo signals and displaying of various echogram graphics along with associate reports. The sounder design past successfully extensive field tests on Wdzydze Lake, and is now under commercialization in C-MAP Group in Italy.

Document Type: Research Article

Publication date: 2003-01-01

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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