Method and system for obtaining road grade data
First Claim
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1. A method of obtaining data for a geographic database using a vehicle moving on roads in a geographic region comprising the steps of:
- collecting data indicating engine load value and position of the vehicle as the vehicle travels in the geographic region;
identifying a location of a road grade change point corresponding to a change in the engine load value data; and
updating the geographic database to indicate the road grade change point.
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Abstract
A method for collecting data for a geographic database is disclosed. Engine load value and position data are collected using a vehicle traveling in a geographic region. A location of a road grade change point is identified corresponding to a change in the engine load value data. The geographic database is updated to indicate the road grade.
106 Citations
20 Claims
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1. A method of obtaining data for a geographic database using a vehicle moving on roads in a geographic region comprising the steps of:
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collecting data indicating engine load value and position of the vehicle as the vehicle travels in the geographic region;
identifying a location of a road grade change point corresponding to a change in the engine load value data; and
updating the geographic database to indicate the road grade change point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of obtaining data for a geographic database using a vehicle moving on roads in a geographic region comprising the steps of:
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collecting data indicating engine load value and position of the vehicle as the vehicle travels in the geographic region;
collecting with a road grade sensor;
identifying a location of a road grade change point corresponding to a change in the engine load value data;
identifying inaccurate data from the road grade sensor when the data from the road grade sensor indicates a change in road grade that does not correspond to the location of the road grade change point; and
updating the geographic database to indicate the road grade change point.
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10. A method of collecting data for a geographic database that represents roads in a geographic region, the method comprising:
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with a vehicle that travels along the roads, receiving engine load data in a data collection system unit located in the vehicle, wherein the engine load data is obtained from an engine load measurement unit associated with an engine located in the vehicle;
analyzing said engine load data;
based on said analyzing, inferring road grade data along said roads; and
storing said road grade data in said geographic database. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of collecting data for a geographic database that represents roads in a geographic region, the method comprising:
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with a vehicle that travels along the roads, receiving engine load data in a data collection system unit located in the vehicle, wherein the engine load data is obtained from an engine load measurement unit associated with an engine located in the vehicle;
analyzing said engine load data;
based on said analyzing, inferring road grade data along said roads; and
storing data in said geographic database that represent road grade, wherein said road grade data indicates an engine load value associated with positions along the road.
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19. A system for collecting data for a geographic database that represents roads in a geographic region comprising:
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a data collection unit located in a vehicle that travel along the roads in the geographic region;
an engine load measurement unit associated with an engine of the vehicle, said engine load measurement unit providing engine load data to said data collection unit;
a data processing unit analyzing said engine load data based on said analyzing, inferring road grade data along said roads and storing said road grade data in the geographic database. - View Dependent Claims (20)
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Specification