Electronic device for a vehicle
First Claim
1. An electronic device for a vehicle, comprising:
- atmospheric pressure measuring means for measuring an atmospheric pressure to provide data on the measured atmospheric pressure;
first atmospheric pressure data storage means for storing first data on an atmospheric pressure at a first point measured by the atmospheric pressure measuring means;
second atmospheric pressure data storage means for storing second data on an atmospheric pressure measured by the atmospheric pressure measuring means at a second point different from the first point;
height difference data storage means for storing data on the difference between the first and second heights;
difference pressure calculating means for providing data on the actual atmospheric pressure difference between the first and second atmospheric pressures, data on which are stored in the first and second atmospheric pressure storage means, respectively; and
display means for displaying data based on data on the actual atmospheric pressure difference provided by the difference pressure calculating means.
1 Assignment
0 Petitions
Accused Products
Abstract
An electronic device for a vehicle detects the number of rotations of a wheel of a vehicle, calculates the distance covered by the vehicle, measures the atmospheric pressure to provide data on the atmospheric pressure, obtains a height corresponding to the measured atmospheric pressure from a height-atmospheric pressure conversion table stored in a RAM on the basis of the measured atmospheric pressure data, calculates an tilt of a road where the vehicle travels on the basis of the height and the measured covered distance, detects a gear corresponding to the calculated tilt from a gear change conversion table, drives a transmission to put the gear in the meshed state. In order to apply a barometer to a weather forecast, an actual height where the vehicle travels is calculated on the basis of data on a tilt of the road measured by an inclinometer attached to the vehicle and the calculated covered distance. A change in the atmospheric pressure due to weather is distinguished from that due to the height to predict weather. The inventive device sets a gear suitable for the road and provides weather prediction, thereby bringing about efficient safe cycling.
31 Citations
9 Claims
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1. An electronic device for a vehicle, comprising:
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atmospheric pressure measuring means for measuring an atmospheric pressure to provide data on the measured atmospheric pressure; first atmospheric pressure data storage means for storing first data on an atmospheric pressure at a first point measured by the atmospheric pressure measuring means; second atmospheric pressure data storage means for storing second data on an atmospheric pressure measured by the atmospheric pressure measuring means at a second point different from the first point; height difference data storage means for storing data on the difference between the first and second heights; difference pressure calculating means for providing data on the actual atmospheric pressure difference between the first and second atmospheric pressures, data on which are stored in the first and second atmospheric pressure storage means, respectively; and display means for displaying data based on data on the actual atmospheric pressure difference provided by the difference pressure calculating means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification