Dynamic pyrotechnical penetrometer

Details Dynamic pyrotechnical penetrometer Dynamic pyrotechnical penetrometer

1995-03-27

1997-01-07

Williams, Hezron E.

Measuring and testing

Hardness

By penetrator or indentor

73 82, G01N 340

Patent

active

055919022

ABSTRACT:
The dynamic pyrotechnical penetrometer enables to determine the features of the soils by continuous detection and measurement of penetration of a probe rod (1) using the pressure created by a pyrotechnical gas generator (5). A standard probe rod (1) mounted on a piston (2) is placed in an amagnetic tube equipped with solenoids. This probe rod accommodates a magnet (3) on the one hand and a recoiling mass (4) on the other, which balances the amount of movement of the rod created by the gases of a pyrotechnical generator (5) contained in this recoiling mass. A unit for acquiring and processing the movement of the standard rod enables to calculate the resistance of the soil to the penetration of the rod.

REFERENCES:
patent: 3159025 (1964-12-01), Pais
patent: 3942368 (1976-03-01), Hoyt
patent: 3946598 (1976-03-01), Towne et al.
patent: 4034603 (1977-07-01), Leeb et al.
patent: 4390307 (1983-06-01), Rice
patent: 4665791 (1987-05-01), Bugiel

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