A review on advanced wireless passive temperature sensors

Abstract

Now-a-days inductor-capacitor (LC) resonator based sensors are widely used in the field of measurement for the measurement of different parameters like pressure, humidity, strain, temperature, pH etc. The basic principle of the sensor is inductive coupling between two loosely coupled inductors in sensing side and reading side. It has the facility of the passive, non-contact and wireless sensing which makes it very advantageous in various field where direct contact with the measurand body is difficult like furnaces, automobile engines, rotating objects, human body etc. In the case of temperature measurement, the LC sensor really plays a crucial role as it helps to measure temperature in inaccessible areas like any harsh and sealed temperature system. A lot of research works are carried out by different researchers for many practical applications. In this paper, a review has been done for a number of recent works on the temperature measurement techniques using LC sensors, which explores the key technologies, different design considerations and methods for assisting the development of LC sensors and configurations and modifications adopted for the respective researches for different future applications.