SIMRAD Brings Chirped SONAR to Recreational Market

  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Small Boat Electrical
  SIMRAD Brings Chirped SONAR to Recreational Market

search | FAQ | profile | register | author help

Author Topic:   SIMRAD Brings Chirped SONAR to Recreational Market

jimh posted 12-02-2010 09:12 AM ET (US)
SIMRAD have announced their new black-box SONAR module accessory model BSM-2 which they describe as the first recreational SONAR to incorporate chirped SONAR techniques. SIMRAD says the BSM-2 outperforms monotonic 3-kW sounders. SIMRAD says the BSM-2 will operate effectively in water with depths to 10,000-feet. (It will be difficult for most recreational boaters to verify this.)
Simrad’s BSM-2 will be available in the first quarter of 2011.
Chirped SONARs emit a frequency modulated continuous wave signal. Digital signal processing techniques are used to demodulate the return echoes. The added frequency component permits significant advantage in signal-to-noise ratio to be obtained. For more on chirped SONAR techniques see
http://www.tritech.co.uk/products/chirp.htm
http://www.mstarlabs.com/dsp/sonar-chirp-signals.html
http://www.oe.fau.edu/CHIRP/the_lab.html
http://www.starfishsonar.com/technology/chirp.htm
jimh posted 12-03-2010 05:52 AM ET (US)
For a rigorous mathematical analysis of the swept frequency or chirp technique of echo locating, see
http://en.wikipedia.org/wiki/Chirp
Further explanation of the demodulation technique for swept or chirped echo-locators is given in
http://en.wikipedia.org/wiki/Pulse_compression
It is anticipated the SIMRAD BSM-2 will be priced about $2,500. To exploit the maximum performance from the device will require use of rather expensive wide-band transducers made by AIRMAR, whose cost will also be significantly more than the typical transom-mount SONAR transducer used on small boats. A transducer cost in the $1,000 to $1,500 range may be typical.
One will also need a corresponding display device, which in the SIMRAD line will mean an NSE model, the least-expensive of which are about $2,500. Thus a working SIMARD chirped SONAR built around the BSM-2 will cost about $6,000.
An echo sounder that costs $6,000 is probably beyond the typical price range for most small boat owners, and the appeal of the BSM-2 will probably be with professional sport fishing boats.

Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.

Author	Topic: SIMRAD Brings Chirped SONAR to Recreational Market
jimh	posted 12-02-2010 09:12 AM ET (US) SIMRAD have announced their new black-box SONAR module accessory model BSM-2 which they describe as the first recreational SONAR to incorporate chirped SONAR techniques. SIMRAD says the BSM-2 outperforms monotonic 3-kW sounders. SIMRAD says the BSM-2 will operate effectively in water with depths to 10,000-feet. (It will be difficult for most recreational boaters to verify this.) Simrad’s BSM-2 will be available in the first quarter of 2011. Chirped SONARs emit a frequency modulated continuous wave signal. Digital signal processing techniques are used to demodulate the return echoes. The added frequency component permits significant advantage in signal-to-noise ratio to be obtained. For more on chirped SONAR techniques see http://www.tritech.co.uk/products/chirp.htm http://www.mstarlabs.com/dsp/sonar-chirp-signals.html http://www.oe.fau.edu/CHIRP/the_lab.html http://www.starfishsonar.com/technology/chirp.htm
jimh	posted 12-03-2010 05:52 AM ET (US) For a rigorous mathematical analysis of the swept frequency or chirp technique of echo locating, see http://en.wikipedia.org/wiki/Chirp Further explanation of the demodulation technique for swept or chirped echo-locators is given in http://en.wikipedia.org/wiki/Pulse_compression It is anticipated the SIMRAD BSM-2 will be priced about $2,500. To exploit the maximum performance from the device will require use of rather expensive wide-band transducers made by AIRMAR, whose cost will also be significantly more than the typical transom-mount SONAR transducer used on small boats. A transducer cost in the $1,000 to $1,500 range may be typical. One will also need a corresponding display device, which in the SIMRAD line will mean an NSE model, the least-expensive of which are about $2,500. Thus a working SIMARD chirped SONAR built around the BSM-2 will cost about $6,000. An echo sounder that costs $6,000 is probably beyond the typical price range for most small boat owners, and the appeal of the BSM-2 will probably be with professional sport fishing boats.