振動頻譜應用於鴨蛋外殼裂痕檢測之研究

A Study on the Vibration Approach to Evaluating Duck Eggshell Crack

鄭經偉(Ching-Wei Cheng) ； 李蒼郎(Tsang-Lang Li) ； 沈明輝(Ming-Huei Shen)

《農業機械學刊》 7卷4期 (1998/12) Pp. 43-52

https://doi.org/10.30062/JAM.199812.0004

摘要

目前對於鴨蛋外殼裂痕檢測之作業皆是以人工來進行，不僅耗時、費力，而且憑藉操作者之經驗判別鴨蛋之裂痕，會因工作疲勞而導致準確度降低。本研究擬以科學實驗方法代替傳統之經驗判別法，即利用衝擊脈波的激振方式探討鴨蛋之共振頻率與其外殼裂痕有無之相關性，以建立判別裂痕蛋與無裂痕蛋之基礎資料，並提供將來發展鴨蛋選別感測器之依據。由同一顆鴨蛋有、無裂痕之試驗結果顯示，有裂痕鴨蛋之第一共振頻率會比無裂痕者明顯降低；由多顆鴨蛋有、無裂痕之試驗結果顯示，無裂痕蛋之第一共振頻率皆介於65～110 Hz之間，有裂痕蛋之第一共振頻率皆介於30～60 Hz之間。

關鍵字

鴨蛋 ； 裂痕 ； 共振頻率

並列摘要

For the present, the work for evaluating duck eggshell is done by human labor, which needs a lot of time and much effort. Such a work was based on operators' experience and might be lower the accuracy due to this tiring task. In this paper, the scientific method was used to replace the traditional method. The impact test by pulse excitation was used to investigate the correlation between the resonant frequencies and crack for duck eggshell. Based on those data, the fundamental information might be constructed, which could be used as a reference to develop a sensor for evaluating duck eggshell in the future. From the results of same duck egg with and without crack, the first resonant frequency of duck eggshell without crack was lower than that with crack. From the results of several duck eggs with and without crack, the first resonant frequency of duck eggshell without crack was between 65and 110 Hz and that with crack was between 30 and 60 Hz.

並列關鍵字

Duck egg ； Crack ； Resonant frequency