A Method of Measuring Local Displacements with Desired Accuracy by Using a Simple Transmitter
Itaru Maeda · Hokkaido University Collection of Scholarly and Academic Papers (Hokkaido University) · 1993
A new method to measure displacements of a point being dangerous to approach is proposed.The procedure of the method is to throw a simple transmitter with a single frequency into the point and to measure the frequency and phase variations at several fixed points.A theory to obtain displacements from the data is presented.A temporal estimate shows that by this method the resolution can be achieved to less than a millimeter.