Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2007-11-06
2007-11-06
Gutierrez, Diego (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
Reexamination Certificate
active
10972876
ABSTRACT:
A sensor assembly for the detection of substances by means of nuclear quadrupolar resonance (NQR) and in the presence of environmental interference. The sensor assembly has a transmitter Txwhich comprises excitation means which generate excitation signals and a switch connected at the outlet of the Transmitter. A first phase-shifted signal divider/adder is connected to the outlet of the switch. First and second sensor elements are connected to the respective outlets of the first phase-shifted signal divider/adder. First and second coupling circuits, preferably of common mode, are connected to the outlet of the first and second sensor elements, respectively. First and second amplifiers are connected to the outlets of the first and second coupling circuits, respectively. First and second bandpass filters are connected to the outlets of the first and second amplifiers, respectively. A second phase-shifted signal divider/adder is connected to the outlets of the first and second bandpass filters, respectively. A receiver RXis connected to the inlet of the second phase-shifted signal divider/adder. The method associated to the sensor assembly is also disclosed.
REFERENCES:
patent: 4763074 (1988-08-01), Fox
patent: 5280246 (1994-01-01), Takahashi et al.
patent: 5510714 (1996-04-01), Takahashi et al.
patent: 5559434 (1996-09-01), Takahashi et al.
patent: 6054856 (2000-04-01), Garroway et al.
patent: 6091240 (2000-07-01), Smith et al.
patent: 6100688 (2000-08-01), Smith et al.
patent: 6222364 (2001-04-01), Smith et al.
patent: 6252461 (2001-06-01), Raab
patent: 6486838 (2002-11-01), Smith et al.
patent: 6552634 (2003-04-01), Raab
patent: 6914432 (2005-07-01), Dumoulin et al.
Agreev et al., “Composite pulses in nuclear quadrupole resonance”, Molecular Physics, vol., 83, pp. 193-220 (1994).
V.S. Grechishkin, “NQR device for detecting plastic explosives Mines and Drugs”, Applied Physics, vol. A55, pp. 505-507 (1992).
D. Tomasi et al., “Fast optimization of a Biplanar Gradient Coil Set”, Journal of Magnetic Resonance, 140: 325-339 (1999).
E.C. Caparelli et al., “Shielded biplanar Gradient Coil Design”, Journal of Magentic Resonance Imaging, 9: 725-731 (1999).
G.V. Mozjuokhine, “The frequency offset effects of NQR of spinI= 1 for remote detection”; Z. Naturforschung, vol. 57a, pp. 297-303 (2002).
Gutierrez Diego
Vargas Dixomara
Volpe and Koenig P.C.
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