Calibration method and calibration apparatus for a hand-held...

Details Calibration method and calibration apparatus for a hand-held... Calibration method and calibration apparatus for a hand-held...

2011-01-25

2011-01-25

Hollington, Jermele M (Department: 2858)

Electricity: measuring and testing

Magnetic

Calibration

Reexamination Certificate

active

07876090

ABSTRACT:
A calibration apparatus for a hand-held locating device (7) has at least one first coil configuration (1a) having a first measuring range (2′) and a second coil configuration (1a′) having a second measuring range (2a′), in which measuring ranges (2a,2a′) homogeneous alternating magnetic fields can be generated in a specifiable ratio with respect to the strength of the magnetic fields. The coil configurations (1a,1a′) are arranged a specifiable distance apart so that the magnetic fields can be detected simultaneously by means of at least two aerials of the locating device (7) which are arranged at a fixed distance. The specifiable ratios define true distance parameters.

REFERENCES:
patent: 3826976 (1974-07-01), Winston et al.
patent: 4983912 (1991-01-01), Roehrlein et al.
patent: 7196604 (2007-03-01), Sills et al.
patent: 2009/0201024 (2009-08-01), Bosnar
patent: 2001-091663 (2001-04-01), None
patent: 2004/003585 (2004-01-01), None

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