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Sensors 2017, 17(7), 1463; doi:10.3390/s17071463

Novel Concrete Temperature Monitoring Method Based on an Embedded Passive RFID Sensor Tag

1
School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China
2
School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang 330013, China
3
School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
4
Rising Micro Electronics Co., Ltd., Guangzhou 510006, China
*
Author to whom correspondence should be addressed.
Received: 17 April 2017 / Revised: 12 June 2017 / Accepted: 20 June 2017 / Published: 22 June 2017
(This article belongs to the Special Issue Low Power Embedded Sensing: Hardware-Software Design and Applications)
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Abstract

This paper firstly introduces the importance of temperature control in concrete measurement, then a passive radio frequency identification (RFID) sensor tag embedded for concrete temperature monitoring is presented. In order to reduce the influences of concrete electromagnetic parameters during the drying process, a T-type antenna is proposed to measure the concrete temperature at the required depth. The proposed RFID sensor tag is based on the EPC generation-2 ultra-high frequency (UHF) communication protocol and operates in passive mode. The temperature sensor can convert the sensor signals to corresponding digital signals without an external reference clock due to the adoption of phase-locked loop (PLL)-based architecture. Laboratory experimentation and on-site testing demonstrate that our sensor tag embedded in concrete can provide reliable communication performance in passive mode. The maximum communicating distance between reader and tag is 7 m at the operating frequency of 915 MHz and the tested results show high consistency with the results tested by a thermocouple. View Full-Text
Keywords: temperature sensor; radio frequency identification (RFID); concrete temperature measurement temperature sensor; radio frequency identification (RFID); concrete temperature measurement
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Liu, Y.; Deng, F.; He, Y.; Li, B.; Liang, Z.; Zhou, S. Novel Concrete Temperature Monitoring Method Based on an Embedded Passive RFID Sensor Tag. Sensors 2017, 17, 1463.

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