Wireless Thermal Bubble Accelerometer on a Flexible Substrate

This paper proposes an innovated method to integrate an active RFID tag with a thermal bubble accelerometer on a flexible substrate, thus it can become a wireless acceleration sensor for easy usage. In this paper a semi-cylindrical chamber filled with Xe (xenon) gas is proposed to replace the original rectangular with CO
₂
. Comparing the response times (32G) are also made; we note the response time with Xe gas is about 51.6% of CO
₂
. On the other hand, comparisons of sensitivity and response time are also made with semi-cylindrical chamber; note the sensitivity with CO
₂
is better at lower G's, but the performances are degraded above 18G and even lower than with Xe above 28G. We see the response times (32G) with Xe is about 20.2% of CO
₂
. Besides, the response speed is doubled with Xe by using semi-cylindrical chamber instead of the rectangular one.