壓電式扭力感測器之研製

The development of piezoelectric torque sensors

郭明倫(Ming-Lun Kuo)

指導教授 ： 丁鏞

中原大學/工學院/機械工程研究所/碩士(2011年)

https://doi.org/10.6840/cycu201100869

摘要

摘 要
本研究題目「壓電式扭力感測器之研製」為設計一種新型之壓電式扭力感測器以及其量測之應用。有別於傳統d 型元件之極化方式及多片式組裝元件，此感測器是採用一體成型d 之極化方式，如此可獲得更好之輸出效果及可靠度，能直接反應外力產生對應之形變，利用壓電之正壓電效應輸出電壓訊號，並藉由適當之感測電路設計得到預設範圍內之電壓值。此輸入扭力與輸出電壓之關係可作為計算扭力之依據，而利用線性迴歸法解決其非線性度(non-linearity)問題，以提升量測精確度。除壓電感測元件主體，輔助之緩衝結構亦極為關鍵，研究內容包括建立具一維傳遞波之動態方程，並使用ANSYS分析軟體，針對施以壓電片之扭力、緩衝結構厚度等不同參數進行分析模擬，探討結構之剪形變以及傳遞波效益，尋求最佳設計參數。該感測器分別應用於扭力鎖緊裝置及馬達啟動扭力輸出以及氣動扳手工具，針對各種應用範例設計量測訊號之扭力計算方法，並進行實驗測試驗證評估其功能。

關鍵字

壓電式扭力感測器 ； 壓電極化

並列摘要

Abstract

In this thesis entitled "The development of piezoelectric torque sensors" investigates a new design of piezoelectric torque sensor and its application. Instead of using the traditional d15, a new polarization method of d15 is developed that gains better output response and reliability. Such a torque sensor can directly respond to the external force by corresponding deformation, and generate output voltage via positive piezoelectric effect. Using an appropriate sensing circuitry, a default range of voltage output signal is obtained. Torque is calculated by using the well-defined relationship between input torque and output voltage. In this study, a linear regression method is used to solve the problem of the nonlinearity, hence measurement accuracy can be improved. In addition to piezoelectric sensor, auxiliary cache structure is also significantly influential to the measurement. Establishment of a one-dimensional transmission with the dynamic wave equation and analysis of deformation of the piezoelectric sensor subject to the torque by using ANSYS software is carried out. Various parameters of auxiliary structure are investigated to pursue an optimal design. Using the developed torque sensor, several applications such as toque-locking device, motor torque output, and torque-wrench tools are studied with practical experiment and evaluated its performance.

並列關鍵字

polarization. ； piezoelectric torque sensor

參考文獻

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