Attività

Development of a Wireless Temperature Sensor Using Polymer-Derived Ceramics

A temperature sensor has been developed using an embedded system and a sensor head made of polymer-derived SiAlCN ceramics (PDCs). PDC is a promising

material for measuring high temperature and the embedded system features low-power consumption, compact size, and wireless temperature monitor. The developed temperature

sensor has been experimentally tested to demonstrate the possibility of using such sensors for real world applications.

1. Introduction

Accurate temperature measurements are crucial for many applications, such as chemical processing, power generation, and engine monitoring. As a result,

development of temperature sensors has always been a focus of microsensor field. A variety of materials have been studied for temperature sensor

applications, for example, semiconducting silicon and silicon carbide. Silicon based sensors are typically used at temperatures lower than 350°C due to

accelerated material degradation at higher temperature [1, 2]. Silicon carbide based sensors are better than silicon based sensors in high temperature

measurement and can be applied in temperatures up to 500°C [3–5].

Polymer-derived SiAlCN ceramics (PDCs) are another widely studied material that demonstrate properties such as excellent high temperature stability [6]

as well as good oxidation/corrosion resistance [7]. PDCs have been considered as a promising material for measuring high temperature [8]. Our early works

have showed that PDC sensor head can accurately measure high temperature up to 830°C [9] using data acquisition system from National Instruments. The cost

and size of the sensor system must be significantly reduced before it can be deployed for real world applications. In this paper, we develop a temperature

sensor using PDC and an embedded system. Comparing to the National Instruments data acquisition equipment used in the previous paper, the newly developed

embedded sensor is much smaller (9.7 dm3 versus 0.3 dm3), lighter (5.97 kg versus 0.19 kg), and cheaper (approximately $8000 versus $170). A WiFi module is also

added so the temperature measurement can be transmitted wirelessly. The embedded board and WiFi module used in this paper are commercially available. The

experiments in this paper demonstrate the possibility of deploying PDC based sensors for real world applications.