Accession Number:

AD0811158

Title:

THE DEVELOPMENT AND EVALUATION OF A MINIATURE VELOCITY GAGE,

Descriptive Note:

Technical rept. Jul 62-Dec 65,

Corporate Author:

STANFORD RESEARCH INST MENLO PARK CA

Report Date:

1967-03-01

Pagination or Media Count:

178.0

Abstract:

Part I of this report describes the theoretical and experimental development of a compact velocity gage. This gage was developed to measure transient velocities from less than 2 cmsec to above 600 cmsec over a frequency range from 1 to 500 cps. It can be used at any inclination and measures the velocity component along one axis only, unaffected by crosswise motion. The gage is nearly a cube of about 5-cm edge length and weighs 375 gm. This gage uses a highly overdamped spring-mass system with its undamped natural frequency at the geometric mean of its frequency range. The relative displacement between mass and instrument case is a direct measure of the velocity of the case. The gage is accurate to within plus or minus 10 percent if calibrated properly. Part II describes an evaluation of the Stanford Research Institute SRI velocity gage discussed in Part I. This evaluation was made to determine the gage performance in measuring the particle velocity of shock-loaded soils. The ability of the gage to measure the input velocity and to follow the motion of the soil was tested. Results indicate that the SRI gage measures the input velocity to within about 10 percent. Gage response to harmonic motion is flat up to about 700 cps. Gage sensitivity is affected by temperature changes by about 1 percent per Fahrenheit degree.

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE