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    • 61. 发明授权
    • Knock detection device for internal combustion engine
    • 内燃机爆震检测装置
    • US08096166B2
    • 2012-01-17
    • US12388616
    • 2009-02-19
    • Satoshi MasudaHirohiko YamadaNaoki KokuboShuhei Oe
    • Satoshi MasudaHirohiko YamadaNaoki KokuboShuhei Oe
    • G01M15/12
    • G01L23/225
    • An output signal of a knock sensor is converted by an A/D conversion part in a specified knock determination range. In a time-frequency analysis part, data of frequency, time, and vibration intensity are extracted at the same time from an output signal of the knock sensor and the time-varying patterns of vibration intensities in multiple frequency ranges are extracted. A knock determination part computes lengths (crank angle, or time period) from a starting point to a latest terminating point of the time-varying patterns of vibration intensity in at least two frequency ranges, which rise at a same time. The knock determination part executes a knock determination based on whether the lengths are greater than a knock determination threshold.
    • 爆震传感器的输出信号由指定的爆震判定范围内的A / D转换部转换。 在时频分析部中,从爆震传感器的输出信号同时提取频率,时间和振动强度的数据,并提取多个频率范围内的振动强度的时变图案。 敲击确定部分计算在至少两个频率范围内的振动强度的时变模式的起始点到最后终点的长度(曲柄角或时间周期),其同时上升。 爆震判定部基于长度是否大于爆震判定阈值来执行爆震判定。
    • 62. 发明授权
    • Knock detection device and knock detection system diagnosis device
    • 敲击检测装置和爆震检测系统诊断装置
    • US08056396B2
    • 2011-11-15
    • US12368490
    • 2009-02-10
    • Satoshi MasudaHirohiko YamadaShuhei OeNaoki Kokubo
    • Satoshi MasudaHirohiko YamadaShuhei OeNaoki Kokubo
    • G01M15/12
    • G01L23/225
    • An output of a knock sensor is A/D converted in a specified knock determination range. In a time-frequency analysis part, data of frequency, time, and vibration intensity are extracted at the same time from the knock sensor output signal and the time-varying patterns of vibration intensities in multiple frequency ranges are extracted. An edge direction and an edge intensity are computed by an edge extraction processing. A correlation value expressing a correlation between time-varying patterns of vibration intensities in multiple frequency ranges and a reference model expressing the feature of knock is computed in a mutual correlation/knock determination part. The correlation value is compared with a determination threshold. When the correlation value is larger than the determination threshold, it is determined that knock is caused. When the correlation value is not larger than the determination threshold, it is determined that knock is not caused.
    • 敲击传感器的输出在指定的敲击判定范围内进行A / D转换。 在时频分析部分,从爆震传感器输出信号中同时提取频率,时间和振动强度的数据,并提取多个频率范围内的振动强度的时变模式。 通过边缘提取处理来计算边缘方向和边缘强度。 在互相关/敲击判定部中计算出表示多个频率范围的振动强度的时变图案与表示敲击特征的参照模型之间的相关性的相关值。 将相关值与确定阈值进行比较。 当相关值大于确定阈值时,确定引起敲击。 当相关值不大于确定阈值时,确定不引起敲击。
    • 65. 发明申请
    • KNOCK DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE
    • 内燃机用检测装置
    • US20090217738A1
    • 2009-09-03
    • US12372140
    • 2009-02-17
    • Naoki KokuboSatoshi MasudaHirohiko YamadaShuhei Oe
    • Naoki KokuboSatoshi MasudaHirohiko YamadaShuhei Oe
    • G01L23/22
    • G01L23/225
    • A knock sensor signal is converted by an A/D conversion part in a specified knock determination range. In a time-frequency analysis part, data of frequency, time, and vibration intensity are extracted at the same time from an output signal of the knock sensor and the time-varying patterns of vibration intensity of multiple frequency ranges are extracted. Contours of the time-varying patterns of vibration intensity in multiple frequency ranges are extracted. Vectors indicating directions along which the vibration intensities vary are approximated by the contour of the time-varying pattern of vibration intensity in each frequency range according to the least-squares method. A knock determination is executed based on whether directions of any two or more of multiple vectors are within a predetermined range. Alternatively, a knock determination is executed based on whether a ratio of length of any two or more of the vectors is within a predetermined range.
    • 爆震传感器信号由指定的爆震判定范围内的A / D转换部转换。 在时频分析部中,从爆震传感器的输出信号同时提取频率,时间和振动强度的数据,并提取多个频率范围的振动强度的随时间变化的模式。 提取多个频率范围内振动强度时变模式的轮廓。 指示振动强度变化的方向的矢量根据最小二乘法近似于每个频率范围内的振动强度的时变模式的轮廓。 基于多个向量中的任何两个或多个的方向是否在预定范围内来执行敲击判定。 或者,基于任何两个或更多个向量的长度的比率是否在预定范围内来执行敲击判定。
    • 69. 发明申请
    • Knock detecting apparatus and method for internal combustion engine
    • 内燃机爆震检测装置及方法
    • US20050241369A1
    • 2005-11-03
    • US11106546
    • 2005-04-15
    • Masaomi InoueYuichi TakemuraSatoshi MasudaKenji KasashimaRihito Kaneko
    • Masaomi InoueYuichi TakemuraSatoshi MasudaKenji KasashimaRihito Kaneko
    • F02P17/12F02D45/00G01L23/22
    • G01L23/225
    • The signal levels of vibration waveform signals outputted by knock sensors are extracted at a filter processing section for each of a plurality of frequency bands. The mean value of the signal levels in the frequency bands at a point in time when variation of the signal levels in the frequency bands is minimum computed, and the mean value is detected as a background level. A knock characteristic parameter, which represents the characteristics of knock, is computed based on the extracted signal levels in the frequency bands. The knock characteristic parameter is compared with the background level to obtain a knock intensity. If the knock intensity is equal to or greater than a knock determination value, it is determined that knock that exceeds a permissible level is occurring. If the knock intensity is less than the knock determination value, it is determined that knock that exceeds the permissible level is not occurring. This configuration permits the background level of the output of the knock sensors to be accurately detected without being influenced by knock or noise.
    • 对于多个频带中的每一个,在滤波处理部分提取由爆震传感器输出的振动波形信号的信号电平。 在频带中的信号电平的变化被计算的时间点的频带中的信号电平的平均值被计算,并且平均值被检测为背景电平。 基于在频带中提取的信号电平来计算表示爆震特性的爆震特征参数。 将敲击特征参数与背景水平进行比较以获得爆震强度。 如果敲击强度等于或大于爆震判定值,则确定发生超过允许水平的爆震。 如果爆震强度小于爆震判定值,则确定没有发生超过允许水平的爆震。 该配置允许在不受敲击或噪声影响的情况下精确地检测爆震传感器的输出的背景水平。