西瓜打击音波特性的研究

On the Characteristics of Sound Wave Forms of Watermelons

以无损判定西瓜成熟度和内部品质为目的，制作了单摆式打击装置，测定了西瓜果实的打击音波曲线。利用ＦＦＴ法分析打击音波的功率谱密度；对打击音波特性值和感官评价值及基础特性之间的相关性进行了分析。

With the purpose to judge watermelon maturity and internal quality without damaging them,a simple pendulum hitting device was developed to determine the feature curves of sound wave forms of watermelons.The FFT method was used to analyse the power spectral density of sound wave forms of watermelons.Also the corre-lation relations among the characteristic values of the sound wave forms,sensory judge-ment values and some values of physical properties were analysed.