Accession Number : AD0282684

Title :   RESEARCH ON DISPLACEMENT GAGES. MECHANICAL PENDULUM GAGE

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : CHILTON,E.G.

Report Date : JUN 1961

Pagination or Media Count : 1

Abstract : For evaluation of the effects of nuclear or chemical explosions underground, the horizontal and vertical displacement of the ground nearby needs to be measured. Integration of accelerometer or velocity gage records is unsatisfactory, and direct displacement measurement is desired. The aperiodic gages developed earlier give an output directly proportional to displacement, but had certain major operational drawbacks. These have been eliminated by changing to long period seismic gages--though at the cost of the convenience of direct proportionality between output and displacement. Tests of a prototype of this type of gage show errors of less than 10% full range for periods of operation up to 2 secs. Calibration procedures and a numerical method for converting the output to displacement are given in detail. (Author)

Descriptors :   *MEASURING INSTRUMENTS, *SEISMOGRAPHS, *UNDERGROUND EXPLOSIONS, ANALYSIS, CALIBRATION, EARTH, ERRORS, LIQUID LEVEL GAGES, MEASUREMENT, TESTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE