Low cost material for multi-bit remote sensing

Low cost material for multi-bit remote sensing

Multiple bits of information may be conveyed by passive target material incorporating filaments of magnetizable material having different magnetization functions and, in particular, different coercivities. Detection of the presence or absence of the individual filaments may be done remotely by measu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FOOKS ELIK I, HOLLINGSWORTH CHARLES S, MCKINNEY TED M, GOLDBERG IRA B, ENGDAHL JONATHAN R
Format: Patent
Sprache:eng
Schlagworte:
ALARM SYSTEMS
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Beschreibung
Zusammenfassung:Multiple bits of information may be conveyed by passive target material incorporating filaments of magnetizable material having different magnetization functions and, in particular, different coercivities. Detection of the presence or absence of the individual filaments may be done remotely by measuring induced flux B as a function of an externally imposed magnetic field waveform and subjecting the measured induced flux signal to differentiation or Fourier transform techniques.