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Compact Infrasound Sensor (CIS)

ENSCO, Inc. Compact Infrasound Sensor (CIS). A Fresh Approach For A Continuing Need Presented By Wayne DeVoe Systems Engineer GeoSystem Solutions Division. OVERVIEW. Compact Infrasound Sensor (CIS). CIS Potential Installation Improvements CIS Design Specifications CIS Construction

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Compact Infrasound Sensor (CIS)

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  1. ENSCO, Inc. Compact Infrasound Sensor(CIS) A Fresh Approach For A Continuing Need Presented By Wayne DeVoe Systems Engineer GeoSystem Solutions Division

  2. OVERVIEW Compact Infrasound Sensor (CIS) • CIS Potential Installation Improvements • CIS Design Specifications • CIS Construction • CIS Preliminary Test Results, with a new digitizer • CIS Applications • Future Plans for the CIS • CIS Availability

  3. Presentation Purpose • Inform Community of the CIS and Its Potential • Obtain Critical Review of Developmental Activities • Identify Evaluation Opportunities • Seek Community Input on Desired Performance and Features

  4. CIS Potential Installation Improvements • Allows Use of Existing Infrastructure (boreholes, vaults, enclosures, etc.) • Compactness Offers New Approaches • Ability to Disguise Installation Sites • Less Vulnerable to: • Flora • Fauna • Environmental Conditions • Theft and Vandalism • Noise Reduction from Wind and Cultural Activities

  5. CIS Design Specifications • Frequency Range 0.01 to 10 Hertz • Analog Range ± 100 Pascals ( ± 0.4 inches of water ) • Sensitivity 0.6 milliPascals @ 1.0 Hertz • Noise Level 0.3 milliPascals @ 1.0 Hertz • Dynamic Range 110 dB • Linearity TBD ( currently under evaluation ) • Temperature Stability TBD ( currently under evaluation ) • Output Voltage ± 1.25 Volts • Input Power 5.0 Volts @ 100 milliAmps • Input Port 1/8-inch barbed fitting • Bleed port 100 seconds time constant • Dimensions 2.5 inches in diameter by 3.5 inches in overall length • Weight less than 2 pounds (Meets International Monitoring System Requirements)

  6. CIS Construction • Physical • Compact • Simple Design • Precision Machined Housing • Enclosed Electronics • Rugged and Durable • Reliable

  7. Side View

  8. End View

  9. Relative Size

  10. Connections

  11. CIS Preliminary Test Results • All Tests performed with a high resolution 24-bit digitizer • Test 1 • Small Balloon Burst from 5 inches • Test 2 • Small Balloon Burst from 10 inches • Test 3 • Opening Large Door into Enclosed Room • Test 4 • Closing Large Door into Enclosed Room • Test 5 • Blowing a Breath into Sensor from 12 inches • Test 6 • Shooting Compressed Nitrogen Stream Across Sensor

  12. Balloon Burst from 5 inches

  13. Balloon Burst from 10 inches

  14. Opening Room Door (Enclosed Room)

  15. Closing Enclosed Room Door

  16. Flow Into Sensor (Breath)

  17. Flow Across Sensor (10 psi Air Hose)

  18. CIS Applications • Construction of New Infrasound Systems • Replacing Older Infrasound Systems • Installs in Any Protected Enclosure • Can be Installed with Seismic Sensors in Existing Boreholes with the New Four-Channel Digitizer

  19. New Four-Channel Digitizer

  20. New Four-Channel Digitizer Benefits • Compact Design Allows Ease of Installation • Installs Anywhere – Completely Sealed • Flexible Input and Control Configurations • Compatible with Wide Range of Sensors • Extremely Low Power – Approx. 1 Watt • Flexible Supply Voltage – 8 to 32 Volts • Optional, Internal FIPS Compliant Authentication

  21. Future Plans for CIS and Digitizer • Establish Active Liaisons in the Community • Evaluate Engineering Models Relative to Existing Sensors • Obtain Additional Feedback from the Community • Conduct Independent Specification Validation Testing • Offer Units for Commercial Sales

  22. CIS Availability • Units for Test and Evaluation • Early 2002 • Commercial Units • Earliest – Mid 2002 • Driven by Interest • Integrated with New Four-Channel Digitizer • Earliest – Late 2002 • Driven by Interest

  23. Summary • Sensor development going extremely well • Performance looks promising • Testing and validation continuing • Expect evaluation units early next year

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