Simple and Portable Strain Meter

Abstract

The device is a portable instrument capable of securing average force values. The view of the instrument constructed is shown in picture (left), and basic circuit arrangement in Fig. 1. The terminals a, b, c, and d are to be connected to thecorners of the wheatston's bridge, formed with 4 strain gages. The bridge is energized by 67.5V. dry-cell batteries or 100V. a. c. source.
It was found that for the testing of a garden tractor, a considerably accurate calibration could be obtained. The transducers made in our research group were used.
All necessary equipment and parts can be ob tained for about 4, 000yen.