Abstract:
The method involves detecting a considered mark repeated along length of a road (203), on an image acquired by a camera (201) e.g. radar, where the mark is formed of elements at a position. Another mark is detected at a remote distance from a vehicle (200), where the mark is presented at another position on road. A determination is made whether change of orientation of the marks exists by an image processing application. Presence of a slope (204) is deduced from the change of marks orientation and a gradient of the slope is calculated from characteristics of the change of marks orientation. An independent claim is also included for a driving assistance device embarked within a vehicle, for determining gradient of a slope, comprising a camera.
Abstract:
PROBLEM TO BE SOLVED: To accurately detect an inclination angle without using a vehicle speed sensor and unaffected by the surroundings even if the reception signal level fluctuates or there is any localized ruggedness of road surface.SOLUTION: A vehicle inclination detecting device comprises transmitting means 1 that radiates a transmission signal as an electric wave; receiving means 2 that acquires first and second reception signals by receiving in two positions an electric wave reflected by road surface and calculates first and second amplitude values and first and second phase values by subjecting the reception signals to orthogonal detection with the transmission signal; an inclination angle calculator 302 that calculates the inclination angle of a vehicle from the difference between the first and second phase values; a vehicle state determining unit 306 that determines the state of the vehicle from the standard deviation of the first and second amplitude values and the standard deviation of the first and second phase values; a road surface state determining unit 307 that determines the state of road surface from the standard deviation of the first and second amplitude values and the standard deviation of the inclination angle; and an output signal calculator 308 that calculates the final inclination angle on the basis of the inclination angle, the state of the vehicle and the state of road surface.
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive and simply structured gravity axis determination method for determining a direction of gravity in a short time.SOLUTION: In a gravity axis determination method for determining and detecting one of three axes constituting a three-dimensional space as a gravity axis, at least two axial acceleration signals each of which denotes accelerations in at least two axial directions among the three axes are generated, and each of the axial acceleration signals is fetched as at least two axial acceleration data strings, and when it is successively determined several times that the axial acceleration data value of one of the axial acceleration data strings in the same time zone is larger than the axial acceleration data value of one of axial acceleration data strings other than the axial acceleration data string, the axis corresponding to the axial acceleration data string is determined as a gravity axis.
Abstract:
PROBLEM TO BE SOLVED: To provide an information processing system and information processor capable of estimating a gradient with a simple arithmetic operation.SOLUTION: The information processing system provided with a center server and a mobile object for communicating with the center server includes a fuel consumption information acquisition part for acquiring information on fuel consumption when the mobile object moves in a first direction from one direction to the other direction in a predetermined section and acquiring information on fuel consumption when the mobile object moves in a second direction from the other direction to the one direction in the section, a comparison part for comparing the fuel consumption in the first direction with the fuel consumption in the second direction, and a gradient estimation part for estimating a gradient of the section on the basis of difference between the fuel consumption in the first direction and the fuel consumption in the second direction.
Abstract:
PROBLEM TO BE SOLVED: To provide an inclination change measuring sensor network device capable of adequately monitoring inclinations such as inclinations of a slope surface and a sharp slope land, or inclinations of a bridge important structure and the like, and inclinations of a ground surface and the like.SOLUTION: The inclination change measuring network device includes: an inclination change measuring and radio data transmitting means having a babble sensor unit, an acceleration sensor unit, a control micro-controller unit and a radio data transmitting unit; and a radio data receiving and data recording means having a radio module unit and a data logger unit. The inclination change measuring and radio data transmitting means is installed at a measuring object point, and the bubble sensor unit measures a change amount of an initial minute inclination at the measuring object point for the inclination change measuring and radio data transmitting means itself. The acceleration sensor unit measures a change amount of an inclination in a x-direction and a change amount of an inclination in a y-direction at the measuring object point. The control micro-controller unit subjects these change amounts to data processing, and transmits the processed data to the radio module unit. The radio module unit receives the data and the data logger unit processes the data.