Melon ripeness monitoring by a portable firmness tester
Melon ripeness monitoring by a portable firmness tester
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通过便携式硬度测试仪监测甜瓜成熟度
DOI：
10.13031/2013.17135
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发表时间：
1998
影响因子：
1.5
通讯作者：
K. Mikuriya
中科院分区：
文献类型：
--
作者：
J. Sugiyama;T. Katsurai;J. Hong;H. Koyama;K. Mikuriya
研制了一种便携式甜瓜硬度测定仪。它测量脉冲波形的传输速度
由柱塞对瓜的冲击引起。手枪型测试仪有一个轻触式冲击机构和两个
麦克风传感器声信号通过PC卡型A/D转换器传送到计算机。传输
从两个声信号的互相关计算的速度显示出高水平的相关性（R = 0.94），
通过破坏性试验测量的表观弹性。硬度测试仪的测量结果可用于监测
成熟甜瓜的生理变化。
A portable firmness tester for melons was developed. It measures the transmission velocity of an impulse waveform
induced by an impact of a plunger on a melon. The pistol-shaped tester has a light-touch impact mechanism and two
microphone sensors. Acoustic signals are transmitted to a computer through a PC card-type A/D converter. The transmission
velocity calculated from the cross correlation of the two acoustic signals showed a high level of correlation (R = 0.94) with
apparent elasticity measured from destructive tests. Measurements with the firmness tester can be used to monitor
physiological changes in ripening melons.