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公开(公告)号：US5119678A
公开(公告)日：1992-06-09
申请号：US456992
申请日：1989-12-26
申请人： Manohar Bashyam , David C. Copley
发明人： Manohar Bashyam , David C. Copley
CPC分类号： G01N29/40 , G01B17/02 , G01N29/0609 , G01N29/0645 , G01N29/30 , G01N29/32 , G01N2291/015 , G01N2291/02854 , G01N2291/048 , G01N2291/102 , G01N2291/269
摘要： A method for locating and identifying defects in a variable geometry workpiece using first and second transceivers positioned of a preselected distance apart adjacent opposite surfaces of the workpiece and aligned to direct ultrasonic signals toward each other through the workpiece. An ultrasound signal is transmitted from each transceiver toward the workpiece. Signal reflections from each adjacent workpiece surface are detected and used to compute workpiece thickness. Signals from one transceiver are detected at the other transceiver and their intensity determined. The signal intensity is normalized in proportion to the obtained workpiece thickness to establish a signal intensity independent of workpiece thickness. In one form, at least three signal processing paths, each having a different preselected gain, provide three signals of different amplified intensities for each measurement point. The one of the signals having the greatest amplitude not exceeding an established maximum processable signal intensity is selected and the actual intensity of the signal passing through the workpiece is computed by correlating the amplitude of the selected one of the three signals with the gain of the channel from which the signal is selected. A signal intensity corresponding to the actual intensity is displayed on an intensity responsive display for each measurement point after the actual intensity is adjusted for workpiece thickness.
摘要翻译： 一种用于使用第一和第二收发器来定位和识别可变几何工件中的缺陷的方法，所述第一和第二收发器定位在工件的相邻相对表面之间的预选距离处，并且对齐以将超声波信号通过工件彼此引导。 从每个收发器向工件发送超声信号。 检测来自每个相邻工件表面的信号反射并用于计算工件厚度。 在另一个收发器处检测来自一个收发器的信号，并确定它们的强度。 信号强度与获得的工件厚度成正比，以建立独立于工件厚度的信号强度。 在一种形式中，每个具有不同预选增益的至少三个信号处理路径为每个测量点提供不同放大强度的三个信号。 选择具有最大幅度的信号幅度不超过建立的最大可处理信号强度的信号之一，并且通过将三个信号中所选择的一个信号的幅度与信道的增益相关联来计算通过工件的信号的实际强度 从中选择信号。 在对工件厚度进行实际强度调整后，在每个测量点的强度响应显示上显示对应于实际强度的信号强度。
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2.发明授权Methods and systems for determining the effectiveness of active noise cancellation 有权确定主动噪声消除有效性的方法和系统公开(公告)号：US07933420B2
公开(公告)日：2011-04-26
申请号：US11646402
申请日：2006-12-28
IPC分类号： A61F11/06
CPC分类号： H04R5/02 , G10K11/178
摘要： A method for controlling a noise cancellation system having an adaptive control portion is provided. The noise cancellation system is operable to generate a cancellation noise configured to at least partially cancel an unwanted noise in a defined environment. The adaptive control portion is operable to adjust the operation of the noise cancellation system based on a level of unwanted noise that remains when the cancellation noise and the unwanted noise are combined. The method includes receiving an error signal representing a portion of a noise not cancelled by a cancellation noise, where the cancellation noise is generated from the noise cancellation system. The method also includes determining whether the level of the error signal exceeds a first threshold value for a first predetermined period of time. The method also includes calculating a crest factor using the error signal. The method also includes determining whether the crest factor exceeds a second threshold value. The method also includes deactivating the adaptive control system and continuing to operate the noise cancellation system if the error value exceeds the first threshold value for the predetermined period of time and the crest factor exceeds the second threshold value.
摘要翻译： 提供了一种用于控制具有自适应控制部分的噪声消除系统的方法。 噪声消除系统可操作以产生消除噪声，其被配置为至少部分地消除限定环境中的不期望的噪声。 自适应控制部分可操作以基于当消除噪声和不需要的噪声被组合时保持的不需要的噪声的水平来调整噪声消除系统的操作。 该方法包括接收表示未被消除噪声抵消的噪声的一部分的误差信号，其中从噪声消除系统产生抵消噪声。 该方法还包括在第一预定时间段内确定误差信号的电平是否超过第一阈值。 该方法还包括使用误差信号计算波峰因数。 该方法还包括确定波峰因数是否超过第二阈值。 如果误差值超过预定时间段的第一阈值并且波峰因数超过第二阈值，该方法还包括去激活自适应控制系统并继续操作噪声消除系统。
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公开(公告)号：US07268671B2
公开(公告)日：2007-09-11
申请号：US10873875
申请日：2004-06-22
CPC分类号： G08B3/10
摘要： A method and apparatus for providing an audible alarm signal. The method and apparatus includes creating a rectangular pulse signal having a desired period and a desired first amplitude, adding a shaped modulation component to the rectangular pulse signal from the desired first amplitude to a desired second amplitude to create a modulating waveform, creating a carrier signal, and combining the carrier signal and the modulating waveform to create the audible alarm signal.
摘要翻译： 一种用于提供可听报警信号的方法和装置。 该方法和装置包括产生具有期望周期和期望的第一幅度的矩形脉冲信号，将矩形脉冲信号从期望的第一幅度加到期望的第二幅度，以产生调制波形，产生载波信号 ，并组合载波信号和调制波形以产生可听报警信号。
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4.发明申请公开(公告)号：US20080162072A1
公开(公告)日：2008-07-03
申请号：US11646401
申请日：2006-12-28
IPC分类号： G01M19/00
CPC分类号： G10K11/178 , G10K2210/128 , G10K2210/503
摘要： A method for measuring performance of a noise cancellation system that is operable to cancel noise is provided. The method includes generating a first model of a target noise. The first model represents the target noise in a form that is received at a location remote from a noise source of the target noise and within a defined environment. The method also includes generating a second model of a cancellation noise. The cancellation noise is configured to at least partially cancel the target noise when combined with the target noise. The second model represents the cancellation noise in a form that is received at the location. The method also includes determining, using the first model and the second model, a cancellation error value indicative of only a portion of the target noise that remains when the target noise and the cancellation noise are combined. The method also includes transmitting the determined cancellation error value to a module operable to monitor a performance level of the noise cancellation system.
摘要翻译： 提供了一种用于测量可消除噪声的噪声消除系统的性能的方法。 该方法包括产生目标噪声的第一模型。 第一个模型表示在远离目标噪声的噪声源并且在定义的环境内的位置处接收的形式的目标噪声。 该方法还包括产生消除噪声的第二模型。 消除噪声被配置为当与目标噪声组合时至少部分地消除目标噪声。 第二个模型表示在该位置接收到的形式中的消除噪声。 该方法还包括使用第一模型和第二模型来确定指示目标噪声和消除噪声组合时剩余的目标噪声的一部分的抵消误差值。 该方法还包括将确定的抵消误差值发送到可操作以监视噪声消除系统的性能水平的模块。
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公开(公告)号：US06273213B1
公开(公告)日：2001-08-14
申请号：US09465711
申请日：1999-12-17
IPC分类号： G10K1104
CPC分类号： G10K11/16
摘要： A noise suppression louver for an enclosure, in particular, an apparatus for suppressing sound at the openings which allow air to enter or exit an internal combustion engine enclosure. The louver comprises a matrix of intersecting horizontal and vertical passive sound absorptive slats.
摘要翻译： 用于外壳的噪声抑制百叶窗，特别是用于抑制开口处的声音的设备，其允许空气进入或离开内燃机外壳。 百叶窗包括相交的水平和垂直无源吸声板条的矩阵。
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6.发明授权公开(公告)号：US08340318B2
公开(公告)日：2012-12-25
申请号：US11646401
申请日：2006-12-28
IPC分类号： H04B15/00
CPC分类号： G10K11/178 , G10K2210/128 , G10K2210/503
摘要： A method for measuring performance of a noise cancellation system that is operable to cancel noise is provided. The method includes generating a first model of a target noise. The first model represents the target noise in a form that is received at a location remote from a noise source of the target noise and within a defined environment. The method also includes generating a second model of a cancellation noise. The cancellation noise is configured to at least partially cancel the target noise when combined with the target noise. The second model represents the cancellation noise in a form that is received at the location. The method also includes determining, using the first model and the second model, a cancellation error value indicative of only a portion of the target noise that remains when the target noise and the cancellation noise are combined. The method also includes transmitting the determined cancellation error value to a module operable to monitor a performance level of the noise cancellation system.
摘要翻译： 提供了一种用于测量可消除噪声的噪声消除系统的性能的方法。 该方法包括产生目标噪声的第一模型。 第一个模型表示在远离目标噪声的噪声源并且在定义的环境内的位置处接收的形式的目标噪声。 该方法还包括产生消除噪声的第二模型。 消除噪声被配置为当与目标噪声组合时至少部分地消除目标噪声。 第二个模型表示在该位置接收到的形式中的消除噪声。 该方法还包括使用第一模型和第二模型来确定指示目标噪声和消除噪声组合时剩余的目标噪声的一部分的抵消误差值。 该方法还包括将确定的抵消误差值发送到可操作以监视噪声消除系统的性能水平的模块。
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公开(公告)号：US08068616B2
公开(公告)日：2011-11-29
申请号：US11646417
申请日：2006-12-28
CPC分类号： G10K11/178 , G10K2210/1282 , G10K2210/3052 , G10K2210/503
摘要： A method for detecting failure in a noise cancellation system is provided. The noise cancellation system is operable to at least partially cancel an unwanted noise produced by a noise source. The method includes receiving a cancellation noise signal from the noise cancellation system. The cancellation noise signal represents a cancellation noise that, when combined with a target noise, is operable to at least partially cancel the target noise. The method also includes receiving an error signal approximately representing a portion of the target noise that remains after the cancellation noise and the target noise are combined. The method also includes determining whether the signal level changed or remains unchanged for each of the received cancellation noise signal and the error signal. The method also includes assigning a failure state of the noise cancellation system based on the determination and initiating a remedial measure that corresponds with the assigned failure state.
摘要翻译： 提供了一种用于检测噪声消除系统中的故障的方法。 噪声消除系统可操作以至少部分地消除由噪声源产生的不期望的噪声。 该方法包括从噪声消除系统接收消除噪声信号。 抵消噪声信号表示抵消噪声，当与目标噪声组合时，其可操作以至少部分地消除目标噪声。 该方法还包括接收大致表示在消除噪声之后保持的目标噪声的一部分并且组合目标噪声的误差信号。 该方法还包括确定对于接收到的消除噪声信号和误差信号中的每个信号电平是否改变或保持不变。 该方法还包括基于该确定来分配噪声消除系统的故障状态，并启动与所分配的故障状态相对应的补救措施。
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公开(公告)号：US07635048B2
公开(公告)日：2009-12-22
申请号：US11583521
申请日：2006-10-19
申请人： David C. Copley , James Callas , Kevin L. Martin
发明人： David C. Copley , James Callas , Kevin L. Martin
IPC分类号： F02B77/13
CPC分类号： F02B77/13
摘要： A machine is provided having an engine system wherein at least one engine system component with an acoustic reflective surface is surrounded by a jacket configured to absorb sound from at least one sound producing device of the engine system. The jacket includes a sound absorbing material such as fibrous thermal insulation and an acoustic permeable covering between the acoustic reflective surface and the engine compartment of the machine. The acoustic permeable covering of the jacket may comprise a micro-perforated skin, whereby acoustic energy from the at least one sound producing device of the engine system can enter a volume defined by the jacket wherein it is absorbed by the sound absorbing material. A method of operating an engine system includes dissipating engine sound within a jacket surrounding an engine system component, the jacket including an acoustic permeable covering and a sound absorbing material positioned within the covering. An exhaust aftertreatment element may by thermally insulated with the jacket.
摘要翻译： 提供一种具有发动机系统的机器，其中具有声反射表面的至少一个发动机系统部件由被配置成吸收来自发动机系统的至少一个声音产生装置的声音的护套包围。 护套包括诸如纤维隔热物之类的吸声材料和声学反射表面与机器的发动机室之间的可透声的覆盖物。 护套的可透声覆盖物可以包括微穿孔皮肤，由此来自发动机系统的至少一个声音产生装置的声能可以进入由护套限定的体积，其中吸收材料被吸收。 一种操作发动机系统的方法包括将发动机声音消散在围绕发动机系统部件的护套内，该护套包括位于罩内的声学渗透覆盖物和吸声材料。 排气后处理元件可以通过与护套热绝缘。
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公开(公告)号：US20080159553A1
公开(公告)日：2008-07-03
申请号：US11646417
申请日：2006-12-28
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/1282 , G10K2210/3052 , G10K2210/503
摘要： A method for detecting failure in a noise cancellation system is provided. The noise cancellation system is operable to at least partially cancel an unwanted noise produced by a noise source. The method includes receiving a cancellation noise signal from the noise cancellation system. The cancellation noise signal represents a cancellation noise that, when combined with a target noise, is operable to at least partially cancel the target noise. The method also includes receiving an error signal approximately representing a portion of the target noise that remains after the cancellation noise and the target noise are combined. The method also includes determining whether the signal level changed or remains unchanged for each of the received cancellation noise signal and the error signal. The method also includes assigning a failure state of the noise cancellation system based on the determination and initiating a remedial measure that corresponds with the assigned failure state.
摘要翻译： 提供了一种用于检测噪声消除系统中的故障的方法。 噪声消除系统可操作以至少部分地消除由噪声源产生的不期望的噪声。 该方法包括从噪声消除系统接收消除噪声信号。 抵消噪声信号表示抵消噪声，当与目标噪声组合时，其可操作以至少部分地消除目标噪声。 该方法还包括接收大致表示在消除噪声之后保持的目标噪声的一部分并且组合目标噪声的误差信号。 该方法还包括确定对于接收到的消除噪声信号和误差信号中的每个信号电平是否改变或保持不变。 该方法还包括基于该确定来分配噪声消除系统的故障状态，并启动与所分配的故障状态相对应的补救措施。
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10.发明申请Methods and systems for determining the effectiveness of active noise cancellation 有权确定主动噪声消除有效性的方法和系统公开(公告)号：US20080159549A1
公开(公告)日：2008-07-03
申请号：US11646402
申请日：2006-12-28
IPC分类号： H04R29/00
CPC分类号： H04R5/02 , G10K11/178
摘要： A method for controlling a noise cancellation system having an adaptive control portion is provided. The noise cancellation system is operable to generate a cancellation noise configured to at least partially cancel an unwanted noise in a defined environment. The adaptive control portion is operable to adjust the operation of the noise cancellation system based on a level of unwanted noise that remains when the cancellation noise and the unwanted noise are combined. The method includes receiving an error signal representing a portion of a noise not cancelled by a cancellation noise, where the cancellation noise is generated from the noise cancellation system. The method also includes determining whether the level of the error signal exceeds a first threshold value for a first predetermined period of time. The method also includes calculating a crest factor using the error signal. The method also includes determining whether the crest factor exceeds a second threshold value. The method also includes deactivating the adaptive control system and continuing to operate the noise cancellation system if the error value exceeds the first threshold value for the predetermined period of time and the crest factor exceeds the second threshold value.
摘要翻译： 提供了一种用于控制具有自适应控制部分的噪声消除系统的方法。 噪声消除系统可操作以产生消除噪声，其被配置为至少部分地消除限定环境中的不期望的噪声。 自适应控制部分可操作以基于当消除噪声和不需要的噪声被组合时保持的不需要的噪声的水平来调整噪声消除系统的操作。 该方法包括接收表示未被消除噪声抵消的噪声的一部分的误差信号，其中从噪声消除系统产生抵消噪声。 该方法还包括在第一预定时间段内确定误差信号的电平是否超过第一阈值。 该方法还包括使用误差信号计算波峰因数。 该方法还包括确定波峰因数是否超过第二阈值。 如果误差值超过预定时间段的第一阈值并且波峰因数超过第二阈值，该方法还包括去激活自适应控制系统并继续操作噪声消除系统。
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