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Title: A Passive Wireless Temperature Sensor for Harsh Environment Applications

Journal Article · · Sensors
DOI:https://doi.org/10.3390/s8127982· OSTI ID:1628568
 [1];  [1];  [2];  [2]
  1. Univ. of Puerto Rico, Mayaguez (Puerto Rico). Dept. of Mechanical Engineering
  2. Boston Applied Technologies, Inc., Woburn, MA (United States)

High temperature sensors capable of operating in harsh environments are needed in order to prevent disasters caused by structural or system functional failures due to increasing temperatures. Most existing temperature sensors do not satisfy the needs because they require either physical contact or a battery power supply for signal communication, and furthermore, neither of them can withstand high temperatures nor rotating applications. This paper presents a novel passive wireless temperature sensor, suitable for working in harsh environments for high temperature rotating component monitoring. A completely passive LC resonant telemetry scheme, relying on a frequency variation output, which has been applied successfully in pressure, humidity and chemical measurement, is integrated with a unique high-k temperature sensitive ceramic material, in order to measure the temperatures without contacts, active elements, or power supplies within the sensor. In this paper, the high temperature sensor design and performance analysis are conducted based on mechanical and electrical modeling, in order to maximize the sensing distance, the Q factor and the sensitivity. In the end, the sensor prototype is fabricated and calibrated successfully up to 235ºC, so that the concept of temperature sensing through passive wireless communication is proved.

Research Organization:
Univ. of Puerto Rico, Mayaguez, PR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE)
Grant/Contract Number:
FG26-07NT43061
OSTI ID:
1628568
Journal Information:
Sensors, Vol. 8, Issue 12; ISSN 1424-8220
Publisher:
MDPI AGCopyright Statement
Country of Publication:
United States
Language:
English

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