Consumers increasingly desire ready-to-eat avocado fruit, yet if supplies fall short of customer expectations, complaints follow, incurring considerable cost and waste. In the avocado sector, wastage due to destructive testing and inaccurate assessment of firmness is significant. The aim of this study was to evaluate whether non-destructive laser Doppler vibrometry (LDV) was capable of assessing avocado ripeness. Data were sourced from two trials using preclimacteric imported 'Hass' avocado fruit originating from Chile and Spain, ripened at 12 and 18 °C, respectively. Standard force-deformation measurements, and either single or simultaneous dual vibration time signals were recorded during shelf-life, and assessed against respiration and non-structural carbohydrate content. Resonant frequencies measured from fruit by means of LDV decreased two- to four-fold during ripening and this corresponded with a concomitant decrease in firmness (253 N –2 N). The capability of the LDV system to non-destructively discriminate between ripeness stages was demonstrated.

中文翻译：

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使用激光多普勒测振法​​无损鉴别鳄梨果实成熟度

消费者越来越想要即食鳄梨水果，但如果供应量达不到客户的期望，投诉就会随之而来，从而导致相当大的成本和浪费。在鳄梨行业，由于破坏性测试和不准确的硬度评估造成的浪费非常严重。本研究的目的是评估非破坏性激光多普勒振动测量 (LDV) 是否能够评估鳄梨的成熟度。数据来自两项试验，使用分别在 12 °C 和 18 °C 成熟的来自智利和西班牙的气候前进口“Hass”鳄梨果实。在保质期内记录标准力-变形测量值以及单个或同时的双振动时间信号，并根据呼吸和非结构性碳水化合物含量进行评估。在成熟过程中，通过 LDV 从果实中测量的共振频率降低了 2 到 4 倍，这与随之而来的硬度降低 (253 N –2 N) 相对应。证明了 LDV 系统无损区分成熟阶段的能力。