Ground Motion Transducer Placement System.
AIR FORCE WEAPONS LAB KIRTLAND AFB N MEX
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During the high explosive simulation testing, it was determined that the placement system used to install free field motion transducer canisters had discrepancies which limited the accuracy with which the canisters could be placed and, thus, effected data accuracy. Therefore, a program was initiated to evaluate the various placement systems in use or previously used and to propose changes or new designs. The criteria used for new designs were the following 1 placement accuracy within at least one degree for all orthogonal axes, 2 the device to be removable from the cured grout which holds the canister in place, 3 a waterproof assembly, 4 shock hardened, to avoid damage caused by rough handling, and 5 lightweight, to allow expedient field operation. In-house research produced the concept of using inclinometers to provide 2-axis leveling in a placement tool at a point just above the canister and keyed extensions to provide above-ground azimuth alignment. This new design will result in higher quality data. The development, evaluation efforts, and operation procedures are discussed.
- Test Facilities, Equipment and Methods