利用薄膜感測器於線上力/扭力量測系統之設計

Design of A On-line Force/Torque Measurement System Using Thin-Film Sensor

陳新元(Hsin-Yuan Chen)

指導教授 ： 丁鏞

中原大學/工學院/機械工程研究所/碩士(2020年)

https://doi.org/10.6840/cycu202000495

摘要

本研究是利用具柔軟性佳、高靈敏度及精確性之聚偏二氟乙烯(PVDF)壓電材料，建立在單一層薄膜設計具多感測電極之特殊型式，並分別以足壓壓力量測、扳手扭力量測、與切削力量測系統三種應用範例進行開發設計。本研究特別針對複雜且具代表性之銑削力量測系統進行詳細設計分析。將薄膜感測器貼附於刀具之適當位置，即可測得切削刀具受到彎矩與扭矩造成之形變產生相對應之電壓訊號。所量測得之訊號經過所設計之感測電路進行即時擷取，及透過無線通訊模組傳遞此大數據資料至電腦系統端，根據切削力與刀具形變之關係建立銑切削數學模型，而計算得在進給方向、橫向及切向力之各切削力。亦架設商用之切削動力計於工件下端同步測試，比對量測數據之精確度與功能評估。相關之組裝測試、感測電路與無線訊號傳輸、以及訊號之力解析皆涵蓋足壓量測以及扳手扭力量測另二項應用。三項測試應用範例之實驗結果可驗證其效果良好。

關鍵字

聚偏二氟乙烯(PVDF)薄膜感測器 ； 足壓量測 ； 扳手扭力量測 ； 銑切削力 ； 量測系統

並列摘要

In this article, a flexible, light, and sensitive PVDF thin-film is used for force measurement. The thin-film sensor of a single layer is constructed with multiple electrodes in special pattern design for foot-pressure, wrench, and milling process three types of force/torque measurement application examples.
The complex and representative milling process is carried out with detailed design and analysis. The one-layer thin-film sensor is directly connected attached to the cutting tool inappropriate position that can detect the measured voltage signals corresponding to the deformation come from the bending and torsional moment on the cutter. All the detected voltage signals will be calibrated by the digital signal processing unit and transmitted a large amount of information data via wireless communication to the remote receiver and control computer system. By using the derived cutting force model, the feed force and transverse force, etc. A traditional dynamometer employed under the workpiece is used to measure the cutting force for comparison and performance verification. The assembly, sensing circuitry, wireless communication, and analytical approach, etc. developed in the milling process can be also used for the other two application examples. Experimental results of these three application examples are presented to verify its good performance respectively.

並列關鍵字

polyvinylidene fluoride (PVDF) thin-film sensor ； foot pressure force measurement ； wrench torque measurement ； milling process force measurement

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