Specialized Optical Fiber Sensor for Nondestructive Intrinsic Quality Measurement of Averrhoa Carambola

作     者：Ahmad Fairuz OMAR Mohd Zubir MATJAFRI 

作者机构：School of Physics Universiti Sains Malaysia 11800 Penang Malaysia 

出 版 物：《Photonic Sensors》 (光子传感器（英文版）)

年 卷 期：2013年第3卷第3期

页      面：272-282页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0802[工学-机械工程] 0814[工学-土木工程] 

基　　金：Universiti Sains Malaysia Research University Grant [1001/PFIZIK/811153] Research University Postgraduate Research Grant Scheme [1001/PJJAUH/843028] Malaysian Federal Agricultural Marketing Authority (FAMA) 

主　　题：Carambola firmness optical fiber sensor pH quality 

摘      要：This paper presents an innovative and low-cost approach for nondestructive fruit quality analysis. The specialized optical fiber sensor developed and presented in this paper used a monochromatic wavelength, rather than a broad spectrum, to measure the intact carambola （star fruit） intrinsic quality, namely pH and firmness. The main objective of this research was to investigate the two optical fiber sensors used in this work, namely, the optical fiber red system （OF-RS） that operated with the peak sensitivity at 635 nm and the optical fiber near the infrared spectroscopy system （OF-NIRS） that operated with the peak sensitivity at 880nm. Both systems showed good accuracy in the pH and firmness measurement of the intact carambola with the correlation coefficient R over 0.75, and the measurement results were comparable with those of the commercial spectrometer. The best measurement results were obtained using OF-RS （pH： R = 0.876; the root mean square error （RMSE） = 0.211 pH; firmness： R = 0.872; RMSE = 0.909 kgf）.