DRIVING RANGE CALCULATION APPARATUS, METHOD AND PROGRAM
First Claim
1. A driving range calculation apparatus for calculating a range reachable by a vehicle that travels by using stored energy, comprising:
- a storage part for storing beforehand, as an energy consumption graph, amounts of energy consumed by a vehicle traveling in both directions along road links on a map rendered in a manner that road links couple road nodes; and
a processing part, which traces a road link from a specified start point location peripherally, calculates, for each road node, a first integration value obtained by integrating amounts of energy in a direction moving away from the start point location on the energy consumption graph and a second integration value obtained by integrating amounts of energy in a direction moving toward the start point location on the energy consumption graph, and based on a relationship between the sum of the first integration value and the second integration value and a given specified amount of energy for each road node, decides a round-trip driving range which is a range within which the vehicle is able to return to the start point location by using the specified amount of energy.
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Abstract
A storage part stores beforehand, as an energy consumption graph, amounts of energy consumed by a vehicle traveling in both directions along road links on a map. A processing part traces a road link from a specified start point location peripherally, calculates, for each road node, a first and second integration values obtained by integrating amounts of energy in a direction moving away from the start point location on the energy consumption graph and in a direction moving toward the start point location on the energy consumption graph, and based on a relationship between the sum of the first integration value and the second integration value, and a given specified amount of energy for each road node, decides a round-trip driving range which is a range within which the vehicle is able to return to the start point location by using the specified amount of energy.
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Citations
10 Claims
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1. A driving range calculation apparatus for calculating a range reachable by a vehicle that travels by using stored energy, comprising:
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a storage part for storing beforehand, as an energy consumption graph, amounts of energy consumed by a vehicle traveling in both directions along road links on a map rendered in a manner that road links couple road nodes; and a processing part, which traces a road link from a specified start point location peripherally, calculates, for each road node, a first integration value obtained by integrating amounts of energy in a direction moving away from the start point location on the energy consumption graph and a second integration value obtained by integrating amounts of energy in a direction moving toward the start point location on the energy consumption graph, and based on a relationship between the sum of the first integration value and the second integration value and a given specified amount of energy for each road node, decides a round-trip driving range which is a range within which the vehicle is able to return to the start point location by using the specified amount of energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A driving range calculation method for calculating a range reachable by a vehicle that travels by using stored energy, comprising:
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recording beforehand, as an energy consumption graph, amounts of energy consumed by a vehicle traveling in both directions along road links on a map rendered in a manner that road links couple road nodes; tracing a road link from a specified start point location peripherally and calculating, for each road node, a first integration value obtained by integrating amounts of energy in a direction moving away from the start point location on the energy consumption graph and a second integration value obtained by integrating amounts of energy in a direction moving toward the start point location on the energy consumption graph; and deciding, based on a relationship between the sum of the first integration value and the second integration value and a given specified amount of energy for each road node, a round-trip driving range which is a range within which the vehicle is able to return to the start point location by using the specified amount of energy.
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10. A driving range calculation program for causing a computer to compute a range reachable by a vehicle that travels by using stored energy, the program causing the computer to realizing:
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a recording part storing beforehand, as an energy consumption graph, amounts of energy consumed by a vehicle traveling in both directions along road links on a map rendered in a manner that road links couple road nodes; and a processing part tracing a road link from a specified start point location peripherally and calculating, for each road node, a first integration value obtained by integrating amounts of energy in a direction moving away from the start point location on the energy consumption graph, and a second integration value obtained by integrating amounts of energy in a direction moving toward the start point location on the energy consumption graph, and deciding, based on a relationship between the sum of the first integration value and the second integration value, and a given specified amount of energy for each road node, a round-trip driving range which is a range within which the vehicle is able to return to the start point location by using the specified amount of energy.
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Specification