Phase Difference Technique for Material Classification by Using Tuning Fork with Piezoelectric Resonator

Abstract

A tuning fork with piezoelectric (TFP) is an electro-mechanical device; its principle performance is based on specific frequency and limited voltage. As the principle, the device can result output significantly. This paper presents a material classification using phase difference value that is received from touching between material and modified TFP. For the modified TFP, it is customized by a millimeter needle. The frequency response method on Bode plot is used to observe the modified TFP behavior, and to select a specific frequency. The first-order model with cascade notch filters is employed to identify mathematical model of the TFP, and to verify the model by simulation. Experimentation is considered on 2 touching techniques: a shear-force type and a tapping mode type. There are hard plastic, iron, silicon rubber, vinyl eraser and hydrogel for test material. The results are described by both time series plots of input-output signals and numerical table of shifted phase. The technique can employed to classify the test materials effectively and explicitly.

Force Sensor and its Application to Tuning Fork Response Measurement

“…The experimentation reveals the effect of resonance frequency and quality factor from increasing mass on main of the QTF. The increasing is suitable for classification of elastic materials [5]. The experimental demonstrates a method to classify elastic materials, which are: silicone rubber, vinyl eraser and hydrogel.…”