کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1784169 1524123 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Application of infrared lock-in thermography for the quantitative evaluation of bruises on pears
ترجمه فارسی عنوان
استفاده از ترموگرافی قفل مادون قرمز برای ارزیابی کمی کبودی بر گلابی
کلمات کلیدی
مادون قرمز قفل در ترموگرافی، موج فتوترمال، پس از برداشت، کبودی ارزیابی غیرمخرب، گلابی
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک اتمی و مولکولی و اپتیک
چکیده انگلیسی


• An infrared lock-in thermography was used for the detection of early bruise on pears.
• A photothermal wave model was employed to investigate the behavior of that on a pear.
• Damaged area causes thermal wave delay.
• A greater phase difference corresponds to greater damage to the pear.

An infrared lock-in thermography technique was adjusted for the detection of early bruises on pears. This mechanical damage is usually difficult to detect in the early stage after harvested using conventional visual sorting or CCD sensor-based imaging processing methods. We measured the thermal emission signals from pears using a highly sensitive mid-infrared thermal camera. These images were post-processed using a lock-in method that utilized the periodic thermal energy input to the pear. By applying the lock-in method to infrared thermography, the detection sensitivity and signal to noise ratio were enhanced because of the phase-sensitive narrow-band filtering effect. It was also found that the phase information of thermal emission from pears provides good metrics with which to identify quantitative information about both damage size and damage depth for pears. Additionally, a photothermal model was implemented to investigate the behavior of thermal waves on pears under convective conditions. Theoretical results were compared to experimental results. These results suggested that the proposed lock-in thermography technique and resultant phase information can be used to detect mechanical damage to fruit, especially in the early stage of bruising.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Infrared Physics & Technology - Volume 63, March 2014, Pages 133–139
نویسندگان
, , , , ,