Acoustic navigation aid for autonomous coal miner

Details Acoustic navigation aid for autonomous coal miner Acoustic navigation aid for autonomous coal miner

1998-12-11

2000-08-01

Williams, Hezron

Measuring and testing

Vibration

By mechanical waves

173 20, 175 50, 738665, 299 105, 299 1009, G01N 2918

Patent

active

060949864

ABSTRACT:
An apparatus for determining thickness of a wall or coal seam includes a ice for measuring the time of sound travel through the thickness; a flexible isolation bellows that mechanically supports the device for measuring the time of sound travel; and a retractable isolation arm attached to the isolation bellows. The device for measuring the time of sound travel may be a single-beam pulse sonar system. The single-beam pulse sonar system includes a pulse generator, a power amplifier, a transmit/receive switch, a reciprocal acoustic transducer, a receiver for determining the thickness, and a display and/or an electronic feedback circuit for steering an autonomous miner.

REFERENCES:
patent: 3969810 (1976-07-01), Pagano
patent: 4546773 (1985-10-01), Kremer et al.
patent: 5101382 (1992-03-01), Yamanaka
patent: 5602327 (1997-02-01), Torizuka et al.
Arch Technology Corporation (ATC) brochure; pp. 1-6; Dec. 1997.

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