Study and simulation of semi-active RFID tags using Piezoelectric Power Supply for mobile process temperature sensing

摘要

RFID has found many applications in internet of things (IOT) in the past decade. But the semi-active RFID tag with battery limits its applications in many fields because it must obtain operating power by battery. Because battery is sensitive to environment and its lifetime is limited, integrated battery can cause many problems in applications. Hence, its applications are restricted in a great extent. For these reasons, our research aims at a kind of battery off RFID. This paper presents a design of semi-active RFID tag with Piezoelectric Power Supply (PPS) for moving temperature sensing, a piezoelectric energy harvester was used as PPS. We call this system PPS-RFID. The PPS-RFID can be used in many fields, especially for recording temperature in a moving process without external power supply. This paper also proposed the circuit of the PPS-RFID for moving temperature sensing. This paper emphasizes the design and simulation of PPS. By our test, 0.242 micro watt of power of PPS was achieved at 1 Hz vibration and 650 Newton pressure force. The results showed that the integrated PPS can supply sufficient power for designed PPS-RFID tag, which can be used in temperature monitoring in a moving process such as temperature limited bio-medicine transportation.