Resonant behavior study of PZT sensor in liquid using PSO method

摘要: Resonant Piezoelectric-excited Millimeter-sized Cantilevers (PEMC), has attracted many researchers' interests in the applications such as liquid level and density sensing. As these applications, PEMC are partially immersed liquid, an appropriate analytical model is needed to predict dynamic behavior of devices. In this work, a been designed fabricated for An developed applied evaluate device with respect different tip immersion depths. To validate proposed model, theoretical results compared experimental depths varying from 5 mm 15 water two resonant modes. A slight deviation between have observed. justify deviations, uncertain parameters also hydrodynamic force's correction factor considered modeling. This introduced modeling order achieve better estimation effect depth variation on force. determine using results, Particle Swarm Optimization (PSO) method utilized. Applying method, data being significantly reduced. The show that negligible natural frequency shift contrary affects it drastically. It concluded improve depths, force required by insertion factor.