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根据苹果水心病的特点,研制出以近红外LED为光源的苹果水心病快速分析的仪器,为苹果水心病的现场检测提供了一个经济、快捷的便携式设备。该测量仪由近红外LED光源、窄带干涉滤光片、菲涅耳透镜、硅光电池检测器、单片机系统等组成。与其他近红外仪器相比,该测量仪具有体积小、结构简单、低功耗、抗震动等特点.结果表明:密度无法分离该样品水心病;而1～4级水心病的透光强度之间存在显著差异,可以进行水心病判断。把近红外810 nm的计算透光强度25 000 作为界限值可以将好果(1级)与3、4级果完全分离.
According to the characteristics of apple water heart disease, developed a rapid analysis instrument of apple water heart disease with near infrared LED as light source, which provided an economical and quick portable device for on-the-spot detection of apple water heart disease. The measuring instrument consists of near infrared LED light source, narrowband interference filter, Fresnel lens, silicon solar cell detector, SCM system and so on. Compared with other near-infrared instruments, this instrument has such characteristics as small volume, simple structure, low power consumption, anti-vibration, etc. The results show that the density can not separate the water-heart disease of the sample, while the light- There are significant differences between, you can judge water and heart disease. The calculation of the transmitted light intensity at 810 nm of near-infrared of 25 000 as the limit value can completely separate the good fruit (Grade 1) from the Grade 3 and 4 fruits.