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An Innovative Ultrasonic Apparatus and Technology for Diagnosis of Freeze-Drying Process

机译：用于冷冻干燥过程诊断的创新超声波设备和技术

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摘要

The freeze-drying process removes water from a product through freezing, sublimation and desorption procedures. However, the extreme conditions of the freeze-drying environment, such as the limited space, vacuum and freezing temperatures of as much as −50 °C, may block the ability to use certain diagnostic sensors. In this paper, an ultrasonic transducer (UT) is integrated onto the bottom of a specially designed frozen bottle for the purpose of observing the freeze-drying process of water at varying amounts. The temperatures and visual observations made with a camera are then compared with the corresponding ultrasonic signatures. Among all of the diagnostic tools and technologies available, only ultrasonic and visual records are able to analyze the entire progression of the freeze-drying process of water. Compared with typical experiment settings, the indication of drying point for water by the amplitude variations of ultrasonic L3 echo could reduce the process period and energy consumption. This study demonstrates how an innovative frozen bottle, an integrated ultrasonic sensor and diagnostic methods used to measure and optimize the freeze-drying process of water can save energy.
机译：冷冻干燥过程通过冷冻，升华和解吸程序从产品中除去水。但是，冷冻干燥环境的极端条件，例如有限的空间，真空和高达-50°C的冷冻温度，可能会阻止使用某些诊断传感器的能力。在本文中，将超声换能器（UT）集成到专门设计的冷冻瓶的底部，以观察不同量的水的冷冻干燥过程。然后将使用照相机进行的温度和视觉观察与相应的超声波特征进行比较。在所有可用的诊断工具和技术中，只有超声和视觉记录才能分析水的冷冻干燥过程的整个过程。与典型的实验设置相比，超声波L 3 回波的幅度变化指示水的干燥点可以减少处理时间和能耗。这项研究证明了创新的冷冻瓶，集成的超声波传感器以及用于测量和优化水的冷冻干燥过程的诊断方法可以节省能源。

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