专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明授权

EP0410685B1 System for reducing noise level in vehicular cabin 失效
标题翻译：一种用于在车辆的客舱降低噪声电平系统
公开(公告)号：EP0410685B1
公开(公告)日：1996-11-27
申请号：EP90308078.6
申请日：1990-07-24
申请人： NISSAN MOTOR CO., LTD.
发明人： Nakaji, Yoshiharu
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/121 , G10K2210/128 , G10K2210/3028 , G10K2210/3033 , G10K2210/3039 , G10K2210/3045
摘要： The system produces an acoustic vibration canceling noise creative vibration induced in synchronism with an engine revolution. The system generates a rectangular wave signal having a 50% duty cycle. The system includes means for producing a periodic signal having an interval half of a period of the noise creative vibration. The signal level of the rectangular signal is switched between HIGH and LOW levels alternately at timings of occurrence of the periodic signal. A crank angle sensor (1) produces the periodic signal. A rectangular wave generator circuit (11), in conjunction with a clock, produces a digital signal representing the rectangular signal. The digital signal is adjusted in phase (at 13) and amplitude (at 14), in response to engine load data and engine speed data, and an acoustic vibration whose frequency and amplitude are represented by the adjusted digital signal is reproduced by a speaker (34).

12. 发明公开

EP0693212A1 HYBRID ANALOG/DIGITAL VIBRATION CONTROL SYSTEM 失效
标题翻译：混合模拟/数字振动控制系统
公开(公告)号：EP0693212A1
公开(公告)日：1996-01-24
申请号：EP94912401.0
申请日：1994-04-07
申请人： NOISE CANCELLATION TECHNOLOGIES, INC.
发明人： GIFFORD, Carl, S. , JONES, Owen , TRINDER, Michael, Charles, John
IPC分类号： F16F13 , F16F15 , G10K11
CPC分类号： F16F15/002 , F16F13/26 , F16F15/02 , G10K11/178 , G10K2210/121 , G10K2210/1282 , G10K2210/129 , G10K2210/1291 , G10K2210/3013 , G10K2210/30232 , G10K2210/3026 , G10K2210/3027 , G10K2210/3032 , G10K2210/3037 , G10K2210/3042 , G10K2210/3045 , G10K2210/3211 , G10K2210/3213 , G10K2210/501 , G10K2210/503 , G10K2210/511
摘要： A vibration control system includes a processor-based circuit which monitors and controls an analog vibration control circuit. The system includes a sensor to detect the undesirable vibrations and a synchronous pulse generator for determining the fundamental frequency of the vibrations emitted by the source. An actuator produces anti-noise to counter unwanted vibrations. The processor circuit tests the system, monitors system functions, and adjusts various parameters to provide optimal performance.

13. 发明公开

EP0643571A1 ACTIVE SELECTIVE HEADSET 失效
标题翻译： ACTIVE选择性耳机。
公开(公告)号：EP0643571A1
公开(公告)日：1995-03-22
申请号：EP92913616.0
申请日：1992-06-05
申请人： NOISE CANCELLATION TECHNOLOGIES, INC.
发明人： EATWELL, Graham , EVANS, Robert , HOHMAN, John , SCOTT, Roy
IPC分类号： A61F11 , G10K11
CPC分类号： G10K11/178 , A61F2011/145 , G10K2210/108 , G10K2210/1081 , G10K2210/121 , G10K2210/3028 , G10K2210/3045 , G10K2210/506
摘要： 2136949 9325167 PCTABS00028 An active selective headset system characterized by a headset (51) having controller means (50) with an LMS adapter, feedback compensator and cancellation filter with reference microphone (54) and residual microphones (53) and speakers (52), where the controller means synthesizes an "anti-noise" to cancel the noise before reaching the ear canal. The headset which is selective, i.e., "anti-noise" signal cancels only the noise signal with minimal affect on speech and warning signal which pass to the ear canal.

14. 发明公开

EP0631685A1 ELECTRONIC CANCELLATION OF D.C. MOTOR NOISE 失效
标题翻译： DC电机噪音的电子压制。
公开(公告)号：EP0631685A1
公开(公告)日：1995-01-04
申请号：EP92915176.0
申请日：1992-03-19
申请人： NOISE CANCELLATION TECHNOLOGIES, INC.
发明人： SMITH, Dexter , SCHWARTZ, Joseph , ZIEGLER, Eldon, W., Jr.
IPC分类号： B60L9 , G10K11 , H02K5 , H02K11 , H02K23 , H02P7
CPC分类号： H02K5/24 , G10K11/178 , G10K2210/10 , G10K2210/121 , G10K2210/123 , G10K2210/3013 , G10K2210/3045 , G10K2210/3212 , G10K2210/501 , H02K11/048 , H02K11/20 , H02K23/66 , H02P7/298
摘要： An active attenuation system for a DC motor (11) which yields global vibration reduction of slot or other motor induced tonals at the plate on which the motor is mounted without modifying the construction of the motor. The system comprises one or more vibration sensors (13), a signal synchronized to the slot rate or other motor induced tonal rate, an electronic adaptive controller (12) and the means to inject the control signal into the motor field and/or armature current.

15. 发明公开

EP0568129A2 Noise attenuation system 失效
标题翻译：噪音衰减系统
公开(公告)号：EP0568129A2
公开(公告)日：1993-11-03
申请号：EP93200970.7
申请日：1993-04-05
申请人： GENERAL MOTORS CORPORATION
发明人： Yuan, Yi
IPC分类号： G10K11/16 , G10K11/178
CPC分类号： F16L55/0333 , F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/1282 , G10K2210/3032 , G10K2210/3039 , G10K2210/3046 , G10K2210/3053 , G10K2210/501
摘要： An active noise control (ANC) system (26) for attenuating engine generated noise contains at least one sinusoidal noise component having an amplitude and frequency which vary with changes in engine rotational speed. The ANC system (26) includes means (42-150,52) for generating an input signal that contains one or more sinusoidal signal components, where each signal component has a frequency corresponding to that of a respective one of the noise components. The input signal is filtered with an adaptive filter (206-210) having adjustable filtering characteristics to produce a filter output signal. Noise cancelling waves are generated by a noise cancelling actuator (28,32,36) in response to the filter output signal, and the cancelling waves are superimposed with the undesirable noise generated by the engine. The level of residual noise resulting from this superposition is sensed and a corresponding error signal is developed. The filtering characteristics of the adaptive filter (206-210) are adaptively adjusted in accordance with the error signal and sensed indications for the engine rotational speed and acceleration. The characteristics of the adaptive filter (206-210) are adjusted according to an algorithm having a convergence factor and a leakage factor, where the value of the convergence factor is scaled as a function of engine acceleration and the value of the leakage factor is scaled as a function of engine speed and acceleration.
摘要翻译：用于衰减发动机产生的噪声的主动噪声控制（ANC）系统（26）包含至少一个具有随着发动机转速的变化而变化的幅度和频率的正弦噪声分量。 ANC系统（26）包括用于生成包含一个或多个正弦信号分量的输入信号的装置（42-150,52），其中每个信号分量具有与相应的一个噪声分量的频率相对应的频率。利用具有可调节滤波特性的自适应滤波器（206-210）对输入信号进行滤波以产生滤波器输出信号。噪声消除波由噪声消除致动器（28,32,36）响应于滤波器输出信号而生成，消除波与由发动机产生的不希望的噪声叠加。感测到由这种叠加产生的残余噪声电平并产生相应的误差信号。自适应滤波器（206-210）的滤波特性根据误差信号和发动机转速和加速度的感测指示自适应地调整。根据具有收敛因子和泄漏因子的算法来调整自适应滤波器（206-210）的特性，其中收敛因子的值根据发动机加速度被缩放并且泄漏因子的值被缩放作为发动机转速和加速度的函数。

16. 发明公开

EP0557071A2 Active noise control apparatus for three-dimensional space 失效
标题翻译： AktivesLärmkontrollegerätfüreinen dreidimensionalen Raum。
公开(公告)号：EP0557071A2
公开(公告)日：1993-08-25
申请号：EP93301150.4
申请日：1993-02-17
申请人： HITACHI, LTD.
发明人： Okabem, Shinya , Shimode, Shinichi , Sato, Ryouji , Hanada, Masamichi , Senshu, Takao , Terada, Hirokiyo , Izushi, Minetoshi , Takenaka, Hiroshi , Ito, Masahiro
IPC分类号： G10K11/16 , F24F13/24
CPC分类号： F24F13/24 , F24F2013/247 , G10K11/178 , G10K2210/104 , G10K2210/121 , G10K2210/3216
摘要： An active noise control system for a three-dimensional space, including noise detecting means, sound generating means, noise control effect detecting means and a control device consisting of a phase of a wave signal fed from the noise detecting means wherein a plurality of noise control effect detecting means and sound generating means are disposed at a distance shorter than a wavelength of the noise to be controlled, and input signals of the respective sound generating means and output signals of the respective noise control effect detecting means are fed through filters, separately, to control the sound for active noise control. In case of an air conditioner, the noise control effect detecting means are disposed at positions where an air stream flowing through the air conditioner is not obstructed thereby.
摘要翻译：一种用于三维空间的主动噪声控制系统，包括噪声检测装置，声音发生装置，噪声控制效果检测装置和由噪声检测装置馈送的波信号的相位组成的控制装置，其中多个噪声控制效果检测装置和声音产生装置设置在比要控制的噪声的波长短的距离处，并且各个声音发生装置的输入信号和各个噪声控制效果检测装置的输出信号分别通过滤波器馈送，控制声音进行主动噪声控制。在空调的情况下，噪声控制效果检测装置设置在不会阻碍流过空调的空气流的位置。

17. 发明公开

EP0533916A1 ACTIVE NOISE CONTROL 失效
标题翻译：有源噪声干扰的设备。
公开(公告)号：EP0533916A1
公开(公告)日：1993-03-31
申请号：EP92912294.0
申请日：1992-04-03
申请人： APPLIED ACOUSTIC RESEARCH INC.
发明人： WARNAKA, Glenn, E. , ROBEY, Robert
IPC分类号： G10K11
CPC分类号： G10K11/178 , G10K2210/109 , G10K2210/112 , G10K2210/121 , G10K2210/3011 , G10K2210/3033 , G10K2210/3214
摘要： A system for reducing noise of a noise generator such as a fan located in a housing includes a short duct directing air to the fan housing. An input transducer is located in the duct at a position further removed from the fan than a cancellation noise source which is also located in the duct. An electronic controller with embedded frequencies related to the steady state operation of the fan inputs cancellation signals to the cancellation source. The input transducer also responds to the random noise of the fan to provide control signals to the controller for generating signals for the cancellation source. The input duct can be multi-cellular with respect of the input transducer and the cancellation source.

18. 发明公开

EP0492680A3 Method and apparatus for attenuating noise 失效
标题翻译：抑制噪声的方法和装置
公开(公告)号：EP0492680A3
公开(公告)日：1993-03-31
申请号：EP91203005.3
申请日：1991-11-19
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Kapsokavathis, Nick S.
IPC分类号： H03H21/00 , G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/12822 , G10K2210/3037 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211 , H03H21/0012
摘要： A method and apparatus are described for controlling output saturation in adaptive digital filters (30) used in active noise control systems. A practical adaptive filter (30) has a specified maximum value for its output signal, above which the output signal becomes clipped and filter output saturation occurs. According to the described method and apparatus, the filter output signal value (OUTPUT(n)) is monitored to detect the occurrence of filter output saturation. Then, the filter (30) is adjusted to reduce the value of the output signal (OUTPUT(n)), when output saturation is detected. Based upon the detection of filter output saturation, a power reference level is established to estimate the maximum average power that the output signal (OUTPUT(n)) can contain without causing saturation. The filter weighting coefficients are then adjusted in accordance with the difference between the established power reference level and a computed average power associated with the filter output signal (OUTPUT(n)).

19. 发明公开

EP0410685A3 System for reducing noise level in vehicular cabin 失效
标题翻译：减少机动车厢噪声水平的系统
公开(公告)号：EP0410685A3
公开(公告)日：1992-09-23
申请号：EP90308078.6
申请日：1990-07-24
申请人： NISSAN MOTOR CO., LTD.
发明人： Nakaji, Yoshiharu
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/121 , G10K2210/128 , G10K2210/3028 , G10K2210/3033 , G10K2210/3039 , G10K2210/3045
摘要： The system produces an acoustic vibration canceling noise creative vibration induced in synchronism with an engine revolution. The system generates a rectangular wave signal having a 50% duty cycle. The system includes means for producing a periodic signal having an interval half of a period of the noise creative vibration. The signal level of the rectangular signal is switched between HIGH and LOW levels alternately at timings of occurrence of the periodic signal. A crank angle sensor (1) produces the periodic signal. A rectangular wave generator circuit (11), in conjunction with a clock, produces a digital signal representing the rectangular signal. The digital signal is adjusted in phase (at 13) and amplitude (at 14), in response to engine load data and engine speed data, and an acoustic vibration whose frequency and amplitude are represented by the adjusted digital signal is reproduced by a speaker (34).

20. 发明公开

EP0492680A2 Method and apparatus for attenuating noise 失效
标题翻译： Verfahren undGerätzurLärmdämpfung。
公开(公告)号：EP0492680A2
公开(公告)日：1992-07-01
申请号：EP91203005.3
申请日：1991-11-19
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Kapsokavathis, Nick S.
IPC分类号： H03H21/00 , G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/12822 , G10K2210/3037 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211 , H03H21/0012
摘要： A method and apparatus are described for controlling output saturation in adaptive digital filters (30) used in active noise control systems. A practical adaptive filter (30) has a specified maximum value for its output signal, above which the output signal becomes clipped and filter output saturation occurs. According to the described method and apparatus, the filter output signal value (OUTPUT(n)) is monitored to detect the occurrence of filter output saturation. Then, the filter (30) is adjusted to reduce the value of the output signal (OUTPUT(n)), when output saturation is detected. Based upon the detection of filter output saturation, a power reference level is established to estimate the maximum average power that the output signal (OUTPUT(n)) can contain without causing saturation. The filter weighting coefficients are then adjusted in accordance with the difference between the established power reference level and a computed average power associated with the filter output signal (OUTPUT(n)).
摘要翻译：描述了用于控制在有源噪声控制系统中使用的自适应数字滤波器（30）中的输出饱和度的方法和装置。实际的自适应滤波器（30）对于其输出信号具有规定的最大值，其上输出信号被限幅并且滤波器输出饱和发生。根据所描述的方法和装置，监视滤波器输出信号值（OUTPUT（n））以检测滤波器输出饱和度的发生。然后，当检测到输出饱和时，调节滤波器（30）以减小输出信号（OUTPUT（n））的值。基于滤波器输出饱和度的检测，建立功率参考电平以估计输出信号（OUTPUT（n））可以包含的最大平均功率而不引起饱和。然后根据建立的功率参考电平和与滤波器输出信号（OUTPUT（n））相关联的计算的平均功率之间的差来调整滤波器加权系数。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式