DEVICE AND METHOD FOR REMOTELY DETERMINING THE IMPULSE RESPONSE OF AN OBJECT USING ELECTROMAGNETIC RADIATION

摘要

The invention relates to a device and a method for remotely determining the impulse response of an object irradiated by a pulse train with low-intensity pulses of electromagnetic radiation. A complete representation of the pulse train transmitted towards the object is known in advance, and a convolution between the signal representation of the pulse train and the signal of the detected response from the object is performed, which provides a signal representation of the impulse response. Said signal representation can then be used, e.g., to analyze possible defects in the structure of the object.

主权项

1. A device for remotely generating and reading the impulse response from an excitation of an object (2), the device comprising:
a device (1) for emitting electromagnetic radiation; a detection device (3) arranged to detect the mechanical response from an object irradiated by the electromagnetic radiation; a signal processing unit (S) coupled to said detection device (3) and arranged to receive a signal representation of the response from said detection device; characterized in that said device (1) for emitting electromagnetic radiation is arranged to transmit pulses of a predetermined wavelength and intensity in a pulse train (O) as claimed in a predetermined sequential pattern, wherein said device (1) is arranged such that a transfer function with the pulses of electromagnetic radiation as input and the mechanical response of the object as output is linear and time-invariant, that said signal processing unit (S) is arranged to perform a convolution between a signal representation of said pulse train (O) and a signal representation (V) of said mechanical response detected by the detection device (3) in order to obtain thereby a signal representation (V′) of the impulse response from the excited object (2).