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    • 4. 发明授权
    • Tool condition monitoring system
    • 工具状态监控系统
    • US5587931A
    • 1996-12-24
    • US546361
    • 1995-10-20
    • Joel W. JonesYa Wu
    • Joel W. JonesYa Wu
    • G05B23/02G08B21/00
    • G05B23/0221G05B23/0235G05B2219/37256G05B2219/37348G05B2219/37457G05B2219/37525G05B2219/50197G05B2219/50203
    • A tool monitoring system monitors the condition of an electrically powered tool performing a cyclical operation. The tool monitoring system operates generally in two modes: learning mode and monitor mode. In learning mode, the tool monitoring system gathers statistical data on the power consumption of tools of the selected tool type during learning cycles. A power threshold is generated based upon the statistical data. The tool monitoring system then counts the number of crossings by each of the learning cycles of the power threshold and generates statistical data regarding the number of crossings. Preferably, the mathematical operation of wavelet packet transform is used to calculate the power threshold. Feature wavelet packets of the power consumption signal of the tool are calculated. The power consumption signal is then reconstructed from the feature wavelet packets and used to determine the power threshold. In monitor mode, the tool monitoring system counts the number of crossings of the power threshold by the power consumption signal of a tool in operation. The tool monitoring system identifies a worn tool when the number of crossings increases to a certain number relative to the crossings by the learning cycles.
    • 工具监控系统监控执行循环操作的电动工具的状态。 工具监控系统通常以两种模式进行操作:学习模式和监视模式。 在学习模式下,工具监控系统在学习周期中收集所选刀具类型刀具功耗的统计数据。 基于统计数据生成功率阈值。 然后,工具监控系统通过功率阈值的每个学习周期对交叉点的数量进行计数,并生成关于交叉数量的统计数据。 优选地,使用小波包变换的数学运算来计算功率阈值。 计算工具功耗信号的特征小波包。 然后从特征小波包重构功耗信号,并用于确定功率阈值。 在监控模式下,工具监控系统通过工作中的功耗信号计算功率阈值的交叉数。 当交叉点的数量相对于学习周期的交叉点增加到一定数量时,工具监控系统识别磨损的工具。
    • 6. 发明申请
    • TOOL CONDITION MONITORING SYSTEM
    • 工具条件监控系统
    • WO1997005982A1
    • 1997-02-20
    • PCT/US1996002220
    • 1996-02-20
    • TRI-WAY MACHINE LTD.
    • TRI-WAY MACHINE LTD.JONES, Joel, W.WU, Ya
    • B23B49/00
    • G05B19/4065G05B2219/37256G05B2219/37348G05B2219/37457G05B2219/37525G05B2219/50197G05B2219/50203
    • The tool monitoring system (10) operates generally in two modes: learning mode (40) and monitor mode (84). In learning mode (40), the tool monitoring system gathers statistical data on the power consumption of tools of the selected tool type during learning cycles. A power threshold (78) is generated based upon the statistical data. The tool monitoring system (10) then counts the number of crossings by each of the learning cycles of the power threshold (78) and generates statistical data regarding the number of crossings (56). Preferably, the mathematical operation of wavelet packet transform (60) is used to calculate the power threshold (78). Feature wavelet packets of the power consumption signal (28) of the tool are calculated. The power consumption signal (28) is then reconstructed from the feature wavelet packets (50) and used to determine the power threshold (78).
    • 工具监控系统(10)通常以两种模式操作:学习模式(40)和监视模式(84)。 在学习模式(40)中,工具监控系统在学习周期中收集所选刀具类型刀具功耗的统计数据。 基于统计数据生成功率阈值(78)。 然后,工具监视系统(10)通过功率阈值(78)的每个学习周期对交叉数进行计数,并产生关于交叉数(56)的统计数据。 优选地,使用小波包变换(60)的数学运算来计算功率阈值(78)。 计算工具的功耗信号(28)的特征小波包。 然后从特征小波包(50)重建功耗信号(28),并用于确定功率阈值(78)。
    • 7. 发明公开
    • TOOL CONDITION MONITORING SYSTEM
    • WERKZEUGZUSTANDSKONTROLLSYSTEM
    • EP0842006A4
    • 1999-01-07
    • EP96907067
    • 1996-02-20
    • TRI WAY MACHINE LTD
    • JONES JOEL WWU YA
    • G05B19/4065B23B49/00B23Q17/09G01R19/17G06F19/00
    • G05B19/4065G05B2219/37256G05B2219/37348G05B2219/37457G05B2219/37525G05B2219/50197G05B2219/50203
    • The tool monitoring system (10) operates generally in two modes: learning mode (40) and monitor mode (84). In learning mode (40), the tool monitoring system gathers statistical data on the power consumption of tools of the selected tool type during learning cycles. A power threshold (78) is generated based upon the statistical data. The tool monitoring system (10) then counts the number of crossings by each of the learning cycles of the power threshold (78) and generates statistical data regarding the number of crossings (56). Preferably, the mathematical operation of wavelet packet transform (60) is used to calculate the power threshold (78). Feature wavelet packets of the power consumption signal (28) of the tool are calculated. The power consumption signal (28) is then reconstructed from the feature wavelet packets (50) and used to determine the power threshold (78).
    • 工具监控系统(10)通常以两种模式操作:学习模式(40)和监视模式(84)。 在学习模式(40)中,工具监控系统在学习周期中收集所选刀具类型刀具功耗的统计数据。 基于统计数据生成功率阈值(78)。 然后,工具监视系统(10)通过功率阈值(78)的每个学习周期对交叉数进行计数,并生成关于交叉数(56)的统计数据。 优选地,使用小波包变换(60)的数学运算来计算功率阈值(78)。 计算工具的功耗信号(28)的特征小波包。 然后从特征小波包(50)重构功耗信号(28),并用于确定功率阈值(78)。