A RESILIENCE METER

Abstract

The basic testing instrument for which resilience meter was developed is composed of a stess measuring system. using magnetostriction gauge, a constant-rate of elongation drive for sample, and two wattmeters to integrate the stress with respect to time.
The electronic system of the instrument is constructed with the following elements:
Oscillator for magnetostriction gauge, amplifier, rectifier, chopper (DC-AC type), amplifier, power amplifier and photocell system for the revolution counting of wattmeter's disc.
This instrument replaces the planimeter for measuring areas under the stress-strain curve, and the area under the curve during the loading cycle is measured by one wattmeter and the one of the unloading is measured by the other.
Resilience, toughness, breaking energy, energy loss and other deformation energes of the fiber system can be measured by this meter.