Early advancements in total infrasound sensors .


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Presentation format. Interim analyses are more important:Examples.Requirements.IS Sensors improvements at CEA/DIF/DASE.Up to MB2000Early microbarometers developments:Evolutions from MB2000 to MB2005.A understudy IS sensor prototype.MB2007 microbarometer.Discussions.. Late interim estimations.
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Slide 1

Early improvements in supreme infrasound sensors Damien PONCEAU, CEA/DIF/DASE Sébastien PEYRAUD, CEA/DIF/DASE Patrick DUPONT, CEA/DIF/DASE Presented at the 2007 ISTW, TOKYO, JP on 15 November 2007

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Presentation design Temporary examinations are increasingly essential: Examples. Necessities. IS Sensors improvements at CEA/DIF/DASE. Up to MB2000 Early microbarometers advancements: Evolutions from MB2000 to MB2005. An understudy IS sensor model. MB2007 microbarometer. Dialogs.

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Recent transitory estimations J. Guilbert, P. Harjadi, M. Purbawinata, S. Jammes, A. Le Pichon, B. Feignier, «  Monitoring of Indonesian volcanoes with infrasound : preparatory outcomes, SURvey of Volcanic Arc of Indonesia  », Infrasound Technology Workshop 2005, PAPEETE. Control utilization should be negligible

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Recent transitory estimations A. Le Pichon, K. Antier, S. Vergniolle, M. Lardy, D. Drob, «  Validating upper-wind models utilizing infrasound from dynamic volcanoes in Vanuatu  », Infrasound Technology Workshop 2006, FAIRBANKS. Simple to transport and introduce Easy to adjust Resistant

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Recent brief estimations A. Smirnov, V. Kunakov, A. Le Pichon, J. Guilbert, « Preliminary aftereffects of confinement and portrayal of enduring infrasound source as recognized by I31KZ », Infrasound Technology Workshop 2007, TOKYO. Control input run should be expanded

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IMS Temporary estimations, new necessities Some IMS prerequisites 1 : Able to settle IS Low Noise Model @ 1 Hz. Dynamic range > 108 dB. New prerequisites 2 : Portable, simple to transport and introduce. Attachment and play. Safe gear working in an exceptionally stable manner and not touchy to changes of topographical and meteorological conditions. What\'s more, others... 1 Working Group B, CTBTO Preparatory Commission, «  Operational manual for infrasound checking and the global trade of infrasound information  », Rev. 10, 7 Sep 2004. 2 O. Sow, CTBTO Preparatory Commission, «  Terms of reference, acquisition of infrasound exploratory exhibit  », CTBTO Preparatory Commission Request for proposition, ref. no. 2007-0213/SOW, 22 Aug 2007.

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Presentation design Temporary analyses are increasingly vital: Examples. Necessities. IS Sensors improvements at CEA/DIF/DASE. Up to MB2000 Early microbarometers advancements: Evolutions from MB2000 to MB2005. An understudy IS sensor model. MB2007 microbarometer. Talks.

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IS Sensors@CEA/DIF/DASE : a few improvements French atomic tests checking An infrasound amplifier Acoustic bandpass conduct 1 extremely delicate to environment. High warm affectability. 1 Y . Rocard, «  Calcul acoustique des microbarographes  », Archives, DASE, December 1969.

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IS Sensors@CEA/DIF/DASE : a few advancements 70\'s French atomic tests checking A flat out infrasound sensor Acoustic lowpass conduct 1 . Versatile and strong.

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IS Sensors@CEA/DIF/DASE : a few improvements 90\'s IMS Proposal MB2000 microbarometer Features: 3 yields for flag, adjustment and checking. High determination @1 Hz. Lessened instabilities. To a great degree low warm affectability. Enhanced heartiness.

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DASE IMS locales regular details For each site: Volume: ~ 30 L Weight: ~ 20 kg Power utilization: ~ 7 W Power input extend : ~ [10.8; 13.2] V Dynamic range: > 108 dB Resistant gear And others… Pipes, meteo. furthermore, broadcast communications excluded

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New "24 bits" securing frameworks Common elements 1 : Portable & attachment and play: Power input extend : ~ [9, 30] V Volume : < 5 L Weight : < 5 kg Power utilization : < 1.5 W Dynamic range (with symmetric information) > 120 dB Resistant hardware And others 1 A . Brisbourne, A. Paul, M. Alvarez, R. Sleeman, «  State of the craftsmanship digitizers  », ORFEUS NERIES joint workshop, October 2007.

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MB2005 microbarometer versus new prerequisites MB2005 highlights 1 : Portable & fitting and play: Power input run: ~ [10.8; 13.2] V Volume & Weight: 3 L, 5 kg Power utilization: ~ 3 W Dynamic range: Filtered yield & symmetric yield : > 108 dB Static weight territory: ± 100 hPa Resistant gear 1 MARTEC, « MB2005 User manual » , ref. 14643-B MARTEC, 23 Jan. 2006.

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Improved MB2005 microbarometer New Specifications: Portable & fitting and play: Power input run: ~ [9; 36] V Volume & Weight: 3 L, 5 kg Power utilization: ~ 1.5 W Dynamic range: Filtered & symmetric yield: > 108 dB Static weight territory: ± 100 hPa Resistant gear

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Conclusion : current arrangement Portable & attachment and play: Power input extend: ~ [9; 30] V Volume & Weight: < 20 L, < 15 kg Power utilization: < 3 W (up to 2 W) Dynamic range: > 108 dB (sensor) > 120 dB (digitizer) Resistant hardware Pipes, meteo. what\'s more, media communications excluded 2 days batteries included. ~ 450 x 300 x 200 mm 3

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IS Sensors@CEA/DIF/DASE : a few improvements 1 Estimated from R. Bowman and G. Shields, «  Ambient Infrasound Noise Estimates and Meteorological Conditions  », Infrasound Technology Workshop 2005, PAPEETE.

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MB2005 determination streamlining

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MB2005 determination enhancement Optimized MB 1 Estimated from R. Bowman and G. Shields, «  Ambient Infrasound Noise Estimates and Meteorological Conditions  », Infrasound Technology Workshop 2005, PAPEETE.

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1 Estimated from R. Bowman and G. Shields, «  Ambient Infrasound Noise Estimates and Meteorological Conditions  », Infrasound Technology Workshop 2005, PAPEETE.l) Dynamic range enhancement (High impedance)  < 8 cm H <13 cm

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MB2007 determinations

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Conclusion : not so distant future measuring chain Portable & fitting and play: Power input extend: ~ [9; 36] V Volume & Weight: 5 L, 9 kg Power utilization: < 800 mW (up to 300 mW) Dynamic range: > 130 dB (sensor) > 120 dB (digitizer) Resistant gear

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Conclusions Temporary infrasound estimations incite new prerequisites for types of gear. Because of the current advancements in digitizers and infrasound sensors, more suitable arrangements are accessible. Extremely fascinating not so distant future arrangements show up.

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