音叉式料位感測器改良與分析

市面上感測器的種類多樣，而大多以接觸式和非接觸式做為區別，目的皆是控管品質能維持一定水準，而重複精準度為維護品質的重點之一。因此，藉由音波穩定性以及能量可傳遞的特點，研發一種音叉式感測器。本論文為研究接觸式物料感測器，利用音波能量傳遞使音叉產生共振來進行被測物的感測。此感測裝置，主要以壓電陶瓷所發出的振動傳導至音叉產生共振原理，利用此原理加強音叉振動效果，架設於機台上利用共振時的音叉來進行接觸式的偵測，並利用音叉接觸式的感測，連線至控制器中做及時的調整，以便在裝填原物料時能更有效的監控，進而提升品質。音叉式的物料感測器，重點在於音叉之設計。由於本論文以廠商所提供的音叉作為尺寸基準，設計製作較佳的理論音叉。藉由利用ANSYS有限元素分析轉體進行振動模態分析，將針對音叉外型尺寸，以及音叉焊接處是否會對振動傳導有所影響，利用田口方法，進行模擬比對。

關鍵字

音叉；壓電陶瓷；音波； ANSYS ；田口法；模態分析

並列摘要

Various types of sensors, most of which are either contact or proximity sensors, are commercially available. The purpose of a sensor is to maintain a specific standard of quality control, and consistent accuracy is a key factor in maintaining quality control. A vibrating fork sensor was developed that utilizes the stability of sound waves and their ability to propagate energy. A contact sensor for materials that senses the presence of materials by using the resonance produced by tuning forks as a result of energy propagating through the sound waves was examined in this study. The proposed sensor apparatus is based on the principle that vibrations emitted from piezoelectric ceramics can be propagated to a vibrating fork to produce resonance, which can amplify the vibrations of the vibrating fork. The sensor can be installed in a machine. The resonating vibrating fork would supply the contact-based sensing results, which are transmitted to a controller for immediate adjustment. This approach allows for more effective control of loading raw materials and lead to increased quality. The tuning fork design is a critical factor of the tuning fork material sensor. Vibrating forks that are theoretically more efficient were designed by improving to the vibrating fork specifications supplied by manufacturers. Vibration mode analyses of the new designs were conducted using the ANSYS finite element analysis rotating body. The Taguchi method was adopted to simulate and compare the tuning forks to determine whether their shape, size, and welding affected their ability to propagate vibrations.

並列關鍵字

Vibrating Fork ； PZT ； ANSYS ； Taguchi

參考文獻

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[13]B. Iaffe, R. S. Roth, and S. Marzullo,1955, “Properties of Piezoelectric Ceramics in the Solid-Solution Series Lead Titanate-Lead Zircon ate-Lead Oxide: Tin Oxide and Lead Titanate-Lead Hafnate”, Journal of Research of the National Bureau of Standards,Vol.55,No.5,pp.239-254

國際替代計量

音叉式料位感測器改良與分析

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