Accession Number : AD0891884

Title :   An Investigation of Parameters for Optimizing Sensitivity in Strain Measurements Using Metallic Strain Gages over Long Lines.

Descriptive Note : Technical rept. Jun-Aug 71,

Corporate Author : AIR FORCE WEAPONS LAB KIRTLAND AFB NM

Personal Author(s) : Esparza, Eduardo D.

Report Date : JAN 1972

Pagination or Media Count : 66

Abstract : The measurement of transient strain, using metallic bondable and weldable strain gages in a Wheatstone bridge, is required to help determine structural response in high-explosive, nuclear-simulation field tests. However, because the strain gage is normally at some distance from its associated conditioning and recording equipment, the problem of differentiating a few millivolts of signal from sometimes prohibitive noise levels is very often present. Therefore, it is important for designers of strain measurement systems to become aware and knowledgeable of methods that will maximize the output signal level from a strain channel by proper selection of strain gages and the Wheatstone bridge configuration in which they are used. By applying these methods to increase the signal-to-noise ratio, valid strain data may be obtained from what could often become a useless channel. (Author)

Descriptors :   *ELECTRIC BRIDGES), (*STRAIN GAGES, (*STRAIN(MECHANICS), MEASUREMENT), STRUCTURAL PROPERTIES, STRUCTURES, RESPONSE, EXPLOSION EFFECTS, NUCLEAR EXPLOSIONS, SIMULATION, SENSITIVITY, TELEMETER SYSTEMS, CIVIL ENGINEERING.

Subject Categories : Civil Engineering
      Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE