Real-Time Vibratory Strain Sensing Using Passive Wireless Antenna Sensor

Passive Frequency Doubling Antenna Sensor for Wireless Strain Sensing

This paper presents the design, simulation, and preliminary measurement of a passive (battery-free) frequency doubling antenna sensor for strain sensing. Illuminated by a wireless reader, the sensor consists of three components, i.e. a receiving antenna with resonance frequency f0, a transmitting antenna with resonance frequency 2f0, and a matching network between the receiving and transmitting...

Thermal effects on a passive wireless antenna sensor for strain and crack sensing

For application in structural health monitoring, a folded patch antenna has been previously designed as a wireless sensor that monitors strain and crack in metallic structures. Resonance frequency of the RFID patch antenna is closely related with its dimension. To measure stress concentration in a base structure, the sensor is bonded to the structure like a traditional strain gage. When the ant...

Passive wireless antenna sensor for strain and crack sensing – electromagnetic modeling, simulation, and testing

This research investigates a passive wireless antenna sensor designed for strain and crack sensing. When the antenna experiences deformation, antenna shape changes, causing shift in electromagnetic resonance frequency of the antenna. A radio frequency identification (RFID) chip is adopted for antenna signal modulation, so that a wireless reader can easily distinguish backscattered sensor signal...

Strain Sensing Through a Passive Wireless Sensor Array

This paper presents the strain sensing capability of a wireless and batteryless smart-skin sensor array. The sensor design is based on a folded patch antenna. When the patch antenna is under strain/deformation, its resonance frequency varies accordingly. The frequency variation can be easily interrogated and recorded by a wireless reader based on a backscattering mechanism. The patch antenna ut...

Crack Detection Using a Passive Wireless Strain Sensor