System for monitoring for risk of road shoulder collapse, and transport vehicle
First Claim
1. A road shoulder collapse risk monitoring system, comprising:
- shoulder shape measuring means for measuring a shape and slope angle of a road shoulder around a vehicle;
measurement position identification means for identifying a wheel position relative to the shoulder when the shoulder shape measuring means measures the shape and slope angle of the shoulder;
shoulder strength calculating means for calculating, from the shape and slope angle of the shoulder measured by the shoulder shape measuring means, strength of the shoulder at the wheel position identified by the measurement position identification means;
wheel load measuring means for measuring a wheel load of the wheel whose position is identified by the measurement position identification means;
collapse risk information presenting means for presenting information on a risk of a collapse of the shoulder at the wheel position identified by the measurement position identification means by comparing the shoulder strength calculated by the shoulder strength calculating means, with the wheel load measured by the wheel load measuring means;
shoulder strength correction data storage means for storing a set of correction parameters used for the shoulder strength calculating means to calculate shoulder strength;
wherein the shoulder strength calculating means calculates shoulder strength using the correction parameters,wherein the correction parameters correspond to a road surface state such as ground hardness, material, soil and water retention, andmeans for measuring a position of the vehicle relative to the shoulder;
wherein the correction parameters in the shoulder strength correction data storage means are stored in association with the vehicle position; and
wherein the shoulder strength calculating means reads out the correction parameters corresponding to the vehicle position measured by the vehicle position measuring means, from the shoulder strength correction data storage means, and then calculates shoulder strength using the read correction parameters,wherein the shoulder strength calculating means defines a sliding surface based on an internal friction angle of the shoulder at the wheel position measured by the measurement position identification means, calculates shear strength at the sliding surface, from the sliding surface, and the shape and slope angle of the shoulder measured by the shoulder shape measuring means, and sets the shear strength as the shoulder strength; and
the collapse risk information presenting means presents collapse risk information on the shoulder by calculating a total of a sediment load exerted upon the sliding surface, and the wheel load measured by the wheel load measuring means, and then comparing a component-of-force directed towards the sliding surface under the total load, with the shear strength.
1 Assignment
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Accused Products
Abstract
Disclosed herein is a shoulder collapse risk monitoring system capable of alerting a driver to a risk of a road shoulder collapse during approach operations to the shoulder.
The system includes: a shoulder shape measuring device 101 that measures a shape and slope angle of a road shoulder around a vehicle; a measurement position identification section 121 that identifies a wheel position relative to the shoulder when the shape and slope angle of the shoulder are measured by the shoulder shape measuring device; a shoulder strength calculating section 122 that calculates, from the shape and slope angle of the shoulder measured by the shoulder shape measuring device, strength of the shoulder at the wheel position identified by the measurement position identification section; a wheel load measuring section 123 that measures a wheel load of the wheel whose position has been identified by the measurement position identification section; and an alert device 105 that presents information on a risk of a collapse of the shoulder at the identified wheel position by comparing the wheel load measured by the wheel load measuring section, with the shoulder strength calculated by the shoulder strength calculating section.
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Citations
10 Claims
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1. A road shoulder collapse risk monitoring system, comprising:
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shoulder shape measuring means for measuring a shape and slope angle of a road shoulder around a vehicle; measurement position identification means for identifying a wheel position relative to the shoulder when the shoulder shape measuring means measures the shape and slope angle of the shoulder; shoulder strength calculating means for calculating, from the shape and slope angle of the shoulder measured by the shoulder shape measuring means, strength of the shoulder at the wheel position identified by the measurement position identification means; wheel load measuring means for measuring a wheel load of the wheel whose position is identified by the measurement position identification means; collapse risk information presenting means for presenting information on a risk of a collapse of the shoulder at the wheel position identified by the measurement position identification means by comparing the shoulder strength calculated by the shoulder strength calculating means, with the wheel load measured by the wheel load measuring means; shoulder strength correction data storage means for storing a set of correction parameters used for the shoulder strength calculating means to calculate shoulder strength; wherein the shoulder strength calculating means calculates shoulder strength using the correction parameters, wherein the correction parameters correspond to a road surface state such as ground hardness, material, soil and water retention, and means for measuring a position of the vehicle relative to the shoulder; wherein the correction parameters in the shoulder strength correction data storage means are stored in association with the vehicle position; and wherein the shoulder strength calculating means reads out the correction parameters corresponding to the vehicle position measured by the vehicle position measuring means, from the shoulder strength correction data storage means, and then calculates shoulder strength using the read correction parameters, wherein the shoulder strength calculating means defines a sliding surface based on an internal friction angle of the shoulder at the wheel position measured by the measurement position identification means, calculates shear strength at the sliding surface, from the sliding surface, and the shape and slope angle of the shoulder measured by the shoulder shape measuring means, and sets the shear strength as the shoulder strength; and the collapse risk information presenting means presents collapse risk information on the shoulder by calculating a total of a sediment load exerted upon the sliding surface, and the wheel load measured by the wheel load measuring means, and then comparing a component-of-force directed towards the sliding surface under the total load, with the shear strength. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification