RESEARCHES

We propose a strain visualization sticker that can display characters and fringe patterns that correspond to the magnitude of strain without the use of electronic elements, such as amplifiers, strain gauges and wires. We focus on the slight displacement produced by the strain and visually magnify and display its displacement with a moire fringe. Figure shows the concept of how to use the sticker. The sticker is simply attached to an object, and it provides strain information by displaying characters which can be seen with the naked eye. An accurate numerical value of the strain can be obtained from the image of the sticker through image processing. When using a telescopic lens, this value can be remotely measured. The structure of the sticker is simple, and its fabrication is inexpensive; therefore, our proposed measurement method using the sticker can be employed for multipoint measurement.