Nuclear quadrupole resonance inspection system
OwnerGareth Shilstone, John Bradley +1inventors
InventorsGareth Shilstone, John Bradley, Richard Jenkinson
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Abstract
A multi-resonant nuclear quadrupole resonance (NQR) inspection system is disclosed. The system comprises a multi-resonant circuit 16 tuned to simultaneously transmit and receive a plurality of signals. The receiver circuit comprises passive circuit protection in the form of a lumped element quarter-wave unit 10 and a signal generator 6 and frequency mixer 8 are used to modify the return signals in order to facilitate signal monitoring. The system has been shown to simultaneously detect RDX and PETN.
Claims12
A nuclear quadrupole resonance (NQR) inspection system for simultaneously detecting the presence of a plurality of target materials comprising transmission means for applying a pulsed radio frequency signal to a sample and a receiver circuit for receiving the return signal wherein the transmission means and receiver circuit comprise a multi-resonant circuit tuned to simultaneously transmit and receive a plurality of signals at a plurality of predetermined frequencies which frequencies substantially match characteristic resonant frequencies of a plurality of target materials and the receiver circuit further comprises passive circuit protection means to permit simultaneous reception of a plurality of return signals.
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Dependencies are inferred from the claim text.