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    • 1. 发明授权
    • Apparatus, method, and program for detecting rotation speed information, and apparatus, method, and, program for detecting tire having decreased pressure
    • 用于检测转速信息的装置,方法和程序,以及用于检测具有降低的压力的轮胎的装置,方法和程序
    • US08306775B2
    • 2012-11-06
    • US12652228
    • 2010-01-05
    • Hajime FujitaHiroaki Kawasaki
    • Hajime FujitaHiroaki Kawasaki
    • G01P3/487G06M15/00G06F19/00
    • G01P3/489B60C23/062
    • A rotation speed information detection apparatus, including: a wheel sensor for detecting passage of teeth of a gear provided in association with tires of a vehicle; a number-of-teeth calculation means for calculating the number of teeth of the gear passed per a sampling cycle set in advance; and a wheel speed calculation means for regularly calculating rotation speed information of the tire with using the number of teeth calculated. The number-of-teeth calculation means is configured to use a ratio between time information at the point and a remaining time until the time at which the next sampling cycle is started is reached to thereby calculate the number of remaining teeth to calculate the number of teeth passed during the sampling cycle. The wheel speed calculation means is configured to calculate tire rotation speed information based on an interval between neighboring teeth in the gear, the number of teeth passed during the sampling cycle, the number of remaining teeth calculated by the number-of-teeth-calculation means, and the sampling cycle.
    • 一种转速信息检测装置,包括:车轮传感器,用于检测与车辆的轮胎相关联地设置的齿轮的通路; 齿数计算装置,用于计算预先设定的每采样周期通过的齿轮齿数; 以及轮速计算装置,用于使用所计算的齿数来规则地计算轮胎的转速信息。 齿数计算装置被配置为使用该点处的时间信息与到达开始下一个采样周期的时间之间的剩余时间之间的比率,从而计算剩余齿数,以计算出 牙齿在取样周期内通过。 轮速计算装置被配置为基于齿轮中的相邻齿之间的间隔,在采样周期期间通过的齿数,由齿数计算装置计算的剩余齿数来计算轮胎转速信息 ,以及采样周期。
    • 2. 发明授权
    • Apparatus, method and program for detecting tire having decreased pressure using bayesian estimation means
    • 使用贝叶斯估计装置检测具有降低的压力的轮胎的装置,方法和程序
    • US08207839B2
    • 2012-06-26
    • US12652243
    • 2010-01-05
    • Hajime FujitaHiroaki Kawasaki
    • Hajime FujitaHiroaki Kawasaki
    • G08B21/00
    • B60C23/061B60C23/062
    • An apparatus for detecting a tire having a decreased pressure based on resonance frequency of tires attached to respective wheels of a vehicle. The apparatus includes a storage means for storing information regarding a distribution of resonance frequencies respectively corresponding to a plurality of air pressure statuses, an initialization means for estimating a frequency characteristic of the rotation speed information or the rotation acceleration information, a frequency estimation means for estimating a frequency characteristic of the rotation speed information or the rotation acceleration information of a running vehicle, and a Bayesian estimation means for subjecting a tire pressure status at a certain time to a Bayesian estimation based on the resonance frequency during the initialization, a resonance frequency at the certain time obtained from the frequency estimation means, and distribution-related information stored in the storage means.
    • 一种用于基于车辆的各车轮附接的轮胎的共振频率来检测具有减小的压力的轮胎的装置。 该装置包括存储装置,用于存储关于分别对应于多个气压状态的共振频率分布的信息,用于估计转速信息或旋转加速度信息的频率特性的初始化装置,用于估计 行驶车辆的转速信息或旋转加速度信息的频率特性,以及基于在初始化期间的共振频率对特定时间的轮胎压力状态进行贝叶斯估计的贝叶斯估计装置, 从频率估计装置获得的一定时间,以及存储在存储装置中的分配相关信息。
    • 4. 发明授权
    • Apparatus, method and program for detecting decrease in tire air pressure including means to reject data
    • 用于检测轮胎气压降低的装置,方法和程序,包括拒绝数据的装置
    • US08299909B2
    • 2012-10-30
    • US12497283
    • 2009-07-02
    • Hajime FujitaHiroaki Kawasaki
    • Hajime FujitaHiroaki Kawasaki
    • G08B21/00
    • B60C23/061B60C23/062
    • An apparatus for detecting a decrease in a tire air pressure includes; a rotation velocity information detection means for regularly detecting tire rotation velocity information regarding the respective wheels of a vehicle; a resonance frequency estimation means for estimating a resonance frequency of the rotation velocity information based on the rotation velocity information obtained by the rotation velocity information detection means; and a determination means for determining, based on the estimated resonance frequency, a decrease in the tire air pressure. The apparatus includes a data rejecting means for rejecting data of rotation velocity information hindering the estimation of the resonance frequency.
    • 用于检测轮胎气压降低的装置包括: 旋转速度信息检测装置,用于定期检测关于车辆的各个车轮的轮胎转速信息; 谐振频率估计装置,用于基于由所述旋转速度信息检测装置获得的旋转速度信息来估计所述旋转速度信息的共振频率; 以及确定装置,用于基于所估计的共振频率来确定轮胎空气压力的降低。 该装置包括用于拒绝阻碍谐振频率的估计的旋转速度信息的数据的数据拒绝装置。
    • 5. 发明申请
    • APPARATUS AND METHOD FOR DETECTING TIRE HAVING DECREASED PRESSURE, AND PROGRAM FOR DETECTING TIRE HAVING DECREASED PRESSURE
    • 用于检测具有降低压力的轮胎的装置和方法,以及用于检测具有降低的压力的轮胎的程序
    • US20100225463A1
    • 2010-09-09
    • US12652243
    • 2010-01-05
    • Hajime FujitaHiroaki Kawasaki
    • Hajime FujitaHiroaki Kawasaki
    • B60C23/00B60C23/02
    • B60C23/061B60C23/062
    • An apparatus for detecting a tire having a decreased pressure based on resonance frequency of tires attached to respective wheels of a vehicle. The apparatus includes a storage means for storing information regarding a distribution of resonance frequencies respectively corresponding to a plurality of air pressure statuses, an initialization means for estimating a frequency characteristic of the rotation speed information or the rotation acceleration information, a frequency estimation means for estimating a frequency characteristic of the rotation speed information or the rotation acceleration information of a running vehicle, and a Bayesian estimation means for subjecting a tire pressure status at a certain time to a Bayesian estimation based on the resonance frequency during the initialization, a resonance frequency at the certain time obtained from the frequency estimation means, and distribution-related information stored in the storage means.
    • 一种用于基于车辆的各车轮附接的轮胎的共振频率来检测具有减小的压力的轮胎的装置。 该装置包括存储装置,用于存储关于分别对应于多个气压状态的共振频率分布的信息,用于估计转速信息或旋转加速度信息的频率特性的初始化装置,用于估计 行驶车辆的转速信息或旋转加速度信息的频率特性,以及基于在初始化期间的共振频率对特定时间的轮胎压力状态进行贝叶斯估计的贝叶斯估计装置, 从频率估计装置获得的一定时间,以及存储在存储装置中的分配相关信息。
    • 10. 发明授权
    • Apparatus, method and program for vehicle mass estimation
    • 车辆质量估计的装置,方法和程序
    • US08554511B2
    • 2013-10-08
    • US12912293
    • 2010-10-26
    • Hajime FujitaMitsuhiro Wada
    • Hajime FujitaMitsuhiro Wada
    • G01G1/18G01G1/20G06F3/01G06F3/02
    • G01G19/086
    • An apparatus, method and program for estimating the mass of a vehicle uses periodically detected tire rotation speed information of the vehicle wheels, calculated tire rotation acceleration information, calculated driving force of the vehicle, and estimated mass of the vehicle as a regression coefficient when the rotation acceleration information and the driving force information are subjected to linear regression. With regard to an error in calculated driving force information, a ratio is calculated between the dispersion of the error obtained one time before and an error at the current moment, and an update adjustment parameter is calculated by adding a stabilization parameter to thus obtained ratio. The calculated update adjustment parameter is used to calculate a Kalman gain so that the mass is sequentially estimated so as to reduce an update width of the regression coefficient when the error ratio is higher.
    • 用于估计车辆质量的装置,方法和程序使用周期性检测的车轮的轮胎转速信息,计算的轮胎转动加速度信息,车辆的计算驱动力和车辆的估计质量作为回归系数 旋转加速度信息和驱动力信息进行线性回归。 关于计算出的驱动力信息的误差,计算出在一次之前获得的误差的偏差与当前时刻的误差之间的比率,并且通过将如此获得的比率的稳定参数相加来计算更新调整参数。 所计算的更新调整参数用于计算卡尔曼增益,使得质量被顺序估计,以便当误差率较高时减小回归系数的更新宽度。