差動変圧器を利用した微小差圧計に関する研究

抄録

Under theoretical considerations on measurement of microdifferential pressure the pressure gage suitable for measuring small pressure variation with good accuracy has been developed. The gage is composed of two pressure chambers separated by a phosphor bronze membrane and differential transformer to detect electrically membrane deflection produced by differential pressure variations. The each chamber has large volumetric capacity enough to eliminate bubble effect generated in the chamber. The obtained sensitivity of the gage is about 0.499 V/mmH₂O/V for pressure range of from 0 to 1 mmH₂O, which enables us to measure even slight pressure change produced by liquid flowing through duct with good accuracy.