会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 9. 发明授权
    • Road-surface condition estimating device
    • 路面状况估计装置
    • US09037376B2
    • 2015-05-19
    • US12137588
    • 2008-06-12
    • Hiroshi Ogawa
    • Hiroshi Ogawa
    • G06F19/00B60T8/172
    • B60T8/172B60T2210/12
    • A front-wheel speed is calculated as a wheel speed of driving wheels, a rear-wheel speed is calculated as a wheel speed of driven wheels, a rear-wheel acceleration is calculated as a wheel acceleration of the driven wheels, a front-wheel-speed difference value is calculated as a driving-wheel-speed difference value, a rear-wheel-speed difference value is calculated as a driven-wheel-speed difference value, a rear-wheel-acceleration difference value is calculated as a driven-wheel-acceleration difference value, and a front-wheel ground load is calculated as a ground load acting on the driving wheels. Based on these calculated values, a gradient of a tire-characteristic curve indicating an amount of change in road-surface friction coefficient with respect to an amount of change in slip rate is calculated, and the calculated gradient of the tire-characteristic curve is compared with preset threshold values, whereby a road-surface friction coefficient as a road-surface condition can be determined.
    • 前轮速度被计算为驱动轮的车轮速度,后轮速度被计算为从动轮的车轮速度,后轮加速度被计算为从动轮的车轮加速度,前轮 计算速度差值作为驱动轮速度差值,将后轮速度差值计算为从动轮速度差值,将后轮加速度差值作为从动轮速度差值计算, 车轮加速度差值和前轮地面载荷被计算为作用在驱动轮上的地面载荷。 基于这些计算值,计算表示路面摩擦系数相对于滑移率变化量的变化量的轮胎特性曲线的坡度,并且比较计算出的轮胎特性曲线的坡度 具有预设阈值,由此可以确定作为路面状况的路面摩擦系数。