冷冻干燥机无线传感器网络的设计与实现

J. Inform. and Commun. Convergence Engineering Pub Date : 2015-03-31 DOI:10.6109/jicce.2015.13.1.021

Y. Cho, Jaerock Kwon, Seyeong Choi

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引用次数: 1

摘要

为冷冻干燥机设计并实现了无线传感器网络。冷冻干燥技术广泛应用于制药、生物技术、食品和农业等领域。考虑到冷冻干燥机中对高分辨率压力和温度测量的需求，所提出的WSN具有在冷冻干燥机中创建监测环境的显着优势。该无线传感器网络采用ZigBee/IEEE 802.15.4网络，其高度计模块包含一个带有串行数字数据接口的高分辨率压力和温度传感器。ZigBee网络适用于无线通信领域的低能耗、低数据速率应用。高度计模块能够感应7.5-975 Torr (10-1300 mbar)范围内的压力和-40颈椎至125颈椎范围内的温度，直流功耗为3W。实现的WSN安装在商用实验室冷冻干燥机中，以展示其功能和效率。通过与安装在冷冻干燥机上的热电偶测得的温度曲线进行比较，发现无线传感器网络测得的温度曲线分辨率优于热电偶测得的温度曲线分辨率。

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Design and Implementation of Wireless Sensor Network for Freeze Dryer

A wireless sensor network (WSN) is designed and implemented for a freeze dryer. Freeze-drying technology is widely used in the fields of pharmacy and biotechnology as well as the food and agriculture industries. Taking into account the demand for high-resolution pressure and temperature measurements in a freeze dryer, the proposed WSN has a significant advantage of creating a monitoring environment in a freeze dryer. The proposed WSN uses a ZigBee/IEEE 802.15.4 network with an altimeter module that contains a high-resolution pressure and temperature sensor with a serial digital data interface. The ZigBee network is suitable for low-energy and low-data-rate applications in the field of wireless communication. The altimeter module is capable of sensing pressure in the range of 7.5–975 Torr (10–1300 mbar) and temperature in the range of -40C to 125C with a DC power consumption of 3 W. The implemented WSN is installed in a commercial laboratory freeze dryer in order to demonstrate its functionality and efficiency. A comparison with the temperature profile measured by a thermocouple installed in the freeze dryer reveals that the resolution of the temperature profile measured by WSN is superior to that measured by the thermocouple.

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J. Inform. and Commun. Convergence Engineering

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