Relative position and/or posture measuring system for...

Details Relative position and/or posture measuring system for... Relative position and/or posture measuring system for...

2008-03-18

2008-03-18

Chase, Shelly (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

C714S819000, C324S207150

Reexamination Certificate

active

11075028

ABSTRACT:
The present invention provides a relative position and/or posture measuring system for measuring relative positions and relative postures between a magnetic field generator and a magnetic field detector by detecting a change in a magnetic field, in which the magnetic field generator includes a clock generator, a plurality of M-sequential code generators, a plurality of spread code generators, a plurality of integrators, and a voltage to current converter, and transmission coils TX, TY, TZ generate magnetic fields according to driving currents based on spread code obtained by converting code sequences generated by the M-sequential code generators to spread code with the spread code generators. The magnetic field detector reversely spreads received magnetic field detection values to obtain a magnetic field amplitude, and computes relative positions and relative postures of the two from the magnetic field amplitude.

REFERENCES:
patent: 4017858 (1977-04-01), Kuipers
patent: 4631519 (1986-12-01), Johnston
patent: 5408176 (1995-04-01), Blatt
patent: 7079591 (2006-07-01), Fling et al.

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