Abstract
A wireless passive sensor array based on inductive-capacitive (LC) resonant circuits capable of simultaneously tracking two points of force loading is described. The sensor consisted of a planar spiral inductor connected to two capacitors forming a resonant circuit with two resonant frequencies. When a load was applied to one or both of the parallel plate capacitors, the distance between the plates of the capacitor was altered, thus shifting the observed resonant peaks. Testing illustrated that applied loading to a particular capacitor caused a significant shift in one of the resonant peaks and also a smaller shift in another resonant peak. This interdependence resulted from each capacitive element being connected to the same inductive spiral and was accounted for with a developed analysis algorithm. To validate the experimental observation, a circuit simulation was also generated to model the sensor behavior with changing force/displacement. The novelty of this system lies not only in its wireless passive nature, but also in the fact that a single LC sensor was fashioned to detect more than one point simultaneously.
Highlights
Wireless sensors consist of sensor components for taking local measurements placed at the areas of interest and a remotely located system to receive information wirelessly for processing and presentation [1,2,3]
A wireless passive sensor array based on inductive-capacitive (LC) resonant circuits capable of simultaneously tracking two points of force loading is described
The sensor consisted of a planar spiral inductor connected to two capacitors forming a resonant circuit with two resonant frequencies
Summary
Wireless sensors consist of sensor components for taking local measurements placed at the areas of interest and a remotely located system to receive information wirelessly for processing and presentation [1,2,3] Since these systems lack physical connections between the sensing components and the processing apparatus, they are highly versatile in terms of sensor deployment, and are ideal for wide area monitoring. A wireless passive sensor, known as the inductivecapacitive (LC) sensor, was developed to monitor changing environmental conditions such as temperature, humidity and pressure [10] This type of sensor altered its capacitance depending on the experienced environmental parameter, resulting in a shift in its resonant frequency. A two element sensor was developed comprised of a planar square spiral inductor and two parallel plate capacitors
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
