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首页> 外文期刊>Journal of active and passive electronic devices >Overcome to Some Technical Limitations and Challenges in Structural Health Monitoring of Concrete Structures Using Wireless Sensor Networks
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Overcome to Some Technical Limitations and Challenges in Structural Health Monitoring of Concrete Structures Using Wireless Sensor Networks

机译：克服了使用无线传感器网络对混凝土结构的结构健康进行监测的一些技术限制和挑战

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This paper presents the development of an automatic wireless sensor monitoring system for civil engineering structures. The objective is to provide a solution to measure both temperature and humidity inside a concrete structure. The research has been focused in the early age and curing phase period. Four solutions have been addressed. The first one involves the use of a negative temperature coefficient (NTC) thermistor and an IRIS mote allowing for the creation of an IEEE 802.15.4 network. However, the results have shown that the sensor measurements present a 5 C standard deviation between the actual and the experimental values. The second one considers the use of the SHT15 (humidity/temperature) sensor, together with the PIC18F4680 microcontroller or the Arduino platform. The third solution involves the use of the SHT21S (humidity/ temperature) sensor and the eZ430-RF2500 wireless development tool platform for the MSP430 microcontroller. In this case, the temperature readings were successfully performed for the first 16 h, while the humidity values were successfully obtained for the first 24 h of the experiment. Although the set of measured values is very promising for the SHT15 and SHT21S sensors, both sensors have stopped working after some time, showing that direct contact between the sensor and the concrete alkaline environment causes its breakdown. Finally, the fourth solution considers both the SHT15 and SHT21S sensors completely shielded allowing for the creation of a long-term solution. As, the SHT15 and SHT12S sensors have not been affected by the alkaline environment for more than two months of operation, enabling real-time and continuous monitoring with almost non-intrusive tiny devices, the potential of applying the proposed inexpensive wireless sensor network approach is verified.
机译：本文介绍了一种用于土木工程结构的自动无线传感器监控系统的开发。目的是提供一种测量混凝土结构内部温度和湿度的解决方案。研究一直集中在早期和治愈阶段。解决了四个解决方案。第一个涉及使用负温度系数（NTC）热敏电阻和IRIS节点，从而可以创建IEEE 802.15.4网络。但是，结果表明，传感器测量值在实际值和实验值之间存在5 C标准偏差。第二个对象考虑将SHT15（湿度/温度）传感器与PIC18F4680微控制器或Arduino平台一起使用。第三种解决方案涉及为MSP430微控制器使用SHT21S（湿度/温度）传感器和eZ430-RF2500无线开发工具平台。在这种情况下，在前16小时成功完成了温度读数，而在实验的前24小时成功获得了湿度值。尽管这组测量值对于SHT15和SHT21S传感器非常有希望，但是两个传感器在一段时间后都已停止工作，这表明传感器与混凝土碱性环境之间的直接接触会导致其损坏。最后，第四个解决方案考虑到SHT15和SHT21S传感器都完全屏蔽，从而可以创建长期解决方案。由于SHT15和SHT12S传感器在超过两个月的运行中都没有受到碱性环境的影响，因此可以使用几乎非侵入性的微型设备进行实时和连续监控，因此，使用建议的廉价无线传感器网络方法的潜力是已验证。

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