Appeal No. 1997-0322
Application 08/014,574
Representative claim 15 is reproduced as follows:
15. An electronic apparatus for measuring a traveling
direction of a vehicle in cycles, comprising:
a geomagnetic sensor mounted to the vehicle for detecting
geomagnetism around the vehicle and outputting electric
signals corresponding to the geomagnetism;
an electronic calculator receiving the electric signals
from the geomagnetic sensor, said calculator including:
current cycle value deriving means for deriving a
current cycle value of a coordinate position of the
geomagnetism detected by the geomagnetic sensor based on
the electric signals,
deviation magnitude deriving means for deriving a
magnitude of a deviation between the current cycle value
and an item associated with a standard azimuth circle,
weight setting means for setting a weighting for the
current cycle value of the geomagnetism and a prior cycle
value of the geomagnetism depending on the magnitude of
the deviation in each cycle such that the current cycle
value has a smaller weight than the prior cycle value as
the magnitude of the deviation increases,
mean data deriving means for deriving mean data from
said current cycle value and said prior cycle value using
said weighting, and
traveling direction deriving means for deriving the
traveling direction of the vehicle based on said mean
data; and
means for producing a signal indicating a traveling
direction of the vehicle based on an output of said traveling
direction deriving means.
4
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007