Patent ID: 9002661
Filing Date: 2015-04-07
Classification: B60C,G01N

Abstract:
1. A method for monitoring a structural health of an object, said method comprising: directing a signal towards the object that includes a first particle originally at a first depth within the object and a second particle originally at a second deeper depth within the object, wherein at least one of the first particle and the second particle may be exposed at a surface of the object, wherein the signal is configured to stimulate at least one of the first particle and the second particle to a state of fluorescence, wherein the first particle is configured to emit a first particle signal and the second particle is configured to emit a second particle signal that is different than the first particle signal; receiving at least one of the first particle signal and the second particle signal as a result of stimulating the at least one of the first particle and the second particle, wherein the stimulation is based on which of the first and second particles are exposed at the surface of the object; identifying the state of fluorescence of the at least one of the first particle signal and the second particle signal associated with the object based on the received at least one of the first particle signal and the second particle signal; determining a first structural health parameter associated with the object based on whether only the first particle signal is received and identified; and determining a second structural health parameter associated with the object based on whether the second particle signal is received and identified.