AI-Powered Smart Food Drying Techniques Enhance Product Quality and Efficiency

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On Wed, 8 Jan, 8:04 AM UTC

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Researchers at the University of Illinois Urbana-Champaign have developed precision food drying techniques using optical sensors and AI, improving efficiency and product quality in the food industry.

AI-Enabled Precision Drying Revolutionizes Food Preservation

Researchers at the University of Illinois Urbana-Champaign have developed innovative smart food drying techniques that leverage artificial intelligence (AI) and optical sensors to enhance product quality and efficiency. This breakthrough in food preservation technology addresses the challenges associated with traditional drying methods, which can often alter food quality and nutritional value 1.

Advantages of Smart Drying Systems

According to Mohammed Kamruzzaman, assistant professor in the Department of Agricultural and Biological Engineering, smart drying or precision drying allows for continuous, real-time monitoring of the process. This approach significantly improves accuracy and efficiency compared to traditional methods that require sample removal for monitoring 2.

Three Key Optical Sensing Systems

The study focuses on three optical sensing systems that can be used individually or in combination:

  1. RGB imaging with computer vision
  2. Near-infrared (NIR) spectroscopy
  3. Near-infrared hyperspectral imaging (NIR-HSI)

Each system offers unique advantages and limitations in terms of capabilities and cost-effectiveness 3.

RGB Imaging with Computer Vision

This system uses a regular camera to capture visible light, providing information about surface-level features such as size, shape, color, and defects. However, it cannot measure moisture content 1.

Near-Infrared (NIR) Spectroscopy

NIR spectroscopy measures the absorbance of different wavelengths of near-infrared light, correlating to unique chemical and physical product characteristics. It can measure internal qualities like moisture content but is limited to scanning one point at a time 2.

Near-Infrared Hyperspectral Imaging (NIR-HSI)

NIR-HSI is the most comprehensive technique, scanning the entire surface of the product and extracting three-dimensional spatial and spectral information. While it provides the most precise data, it is also the most expensive option, with equipment costs up to 100 times more than RGB cameras 3.

Integration of AI and Machine Learning

All three methodologies require integration with AI and machine learning to process the information effectively. The models must be trained for specific applications, with NIR-HSI demanding the most computational power due to the large amount of data it collects 1.

Practical Application and Future Directions

The researchers developed a convective heat oven to test these techniques on apple slices, combining RGB and NIR systems initially, with plans to discuss NIR-HSI findings in a future paper. The convergence of these technologies with AI represents a transformative future for food drying, overcoming limitations of conventional monitoring methods 2.

Future developments may include portable, hand-held NIR-HSI devices, enabling continuous monitoring and real-time quality control in various operating environments. This advancement could significantly impact the food industry by improving preservation techniques and maintaining product quality 3.

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