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61. 发明专利

JP2004004583A ACTIVE SILENCER AND ACTIVE SILENCING METHOD 审中-公开
公开(公告)号：JP2004004583A
公开(公告)日：2004-01-08
申请号：JP2003054685
申请日：2003-02-28
申请人： TOSHIBA CORP
发明人： EBATO AKIHIKO , NISHIMURA OSAMU , SHIOYAMA TSUTOMU
IPC分类号： E01F8/00 , G10K11/178
摘要： PROBLEM TO BE SOLVED: To provide an active sound insulation device, capable of reducing a diffracted sound by relatively simple control constitution, even when the phase of the diffracted sound in the longitudinal direction of a sound proof wall is different. SOLUTION: There are provided a control speaker 13 which is disposed on the sound proof wall S toward the side for silencing and which outputs a control sound with a prescribed amplitude and a phase, a control microphone 11 which is disposed above the sound proof wall S and which detects the sound pressures or the acoustic intensities of the noise and the control sound, and a control circuit 12, which controls the output of the controlling speaker 13 so as to minimize the output signal of the control microphone 11, on the basis of the sound pressure or the acoustic intensity measured by the control microphone 11. The control speaker 13 has a linear sound source characteristics. COPYRIGHT: (C)2004,JPO

62. 发明专利

JPH10268872A FAN NOISE REDUCING DEVICE AND ELECTRONIC EQUIPMENT 失效
公开(公告)号：JPH10268872A
公开(公告)日：1998-10-09
申请号：JP7193197
申请日：1997-03-25
申请人： TOSHIBA CORP
发明人： UBUKATA HIROSHI , EBATO AKIHIKO
IPC分类号： F01N1/00 , G10K11/16 , G10K11/178
摘要： PROBLEM TO BE SOLVED: To effectively reduce a fan noise, by radiating an erasing sound with an opposite phase and the same amplitude to the fan noise, toward the fan noise based the fan noise received with a sound receiving means. SOLUTION: The fan noise is caused from a fan 1, and this fan noise passes through the inside of a duct 2 to become the fan noise of a monopole and to be radiated to the outside of the duct 2. A microcrophone 3 receives the fan noise of the monopole, and converts it to an electric signal to output as the sound pressure signal of the fan noise. A phase adjustment circuit 6 generates a control sound pressure signal with the opposite phase and the same amplitude to the inputted sound pressure signal to output it to a synthetic circuit 7. The synthetic circuit 7 synthesizes analogically the control sound pressure signal with a system sound pressure signal inputted from a CPU 8 at need to output it to a speaker 4. At this time, the phase of the control sound pressure signal is adjusted according to a distance d, etc., between the fan 1 and speaker 4, and the ensure of the fan noise by the erasing sound is optimized.

63. 发明专利

JPH09258745A DESIGN METHOD FOR ACTIVE MUFFLER AND ACTIVE MUFFLING SYSTEM 失效
公开(公告)号：JPH09258745A
公开(公告)日：1997-10-03
申请号：JP8875696
申请日：1996-03-18
申请人： TOSHIBA CORP
发明人： EBATO AKIHIKO , MORIKAWA YUICHI , HAYASHI TAKURO
IPC分类号： B66B11/02 , F24F13/02 , G10K11/16 , G10K11/178
摘要： PROBLEM TO BE SOLVED: To provide a design method for an active muffler and an active muffling system that can muffle noise intruding into space with reflection by a simple method. SOLUTION: In an active muffler for reducing the sound power of noise intruding into space where sound reflection exists, additional sound source 25a, 25b are arranged near the intrusion port of noise 23 in the closed space 21, and an error signal detecting means 27 is arranged in a position 31 of a node (sound pressure minimum point) formed at the time of emitting sound energy opposite in phase but with the same volume velocity (amplitude) as the noise of a vibrating face 30 in the intrusion port of the noise 23 from the additional sound source 25a, 25b.

64. 发明专利

JPH0836391A ACTIVE MUFFLER 失效
公开(公告)号：JPH0836391A
公开(公告)日：1996-02-06
申请号：JP17091194
申请日：1994-07-22
申请人： TOSHIBA CORP
发明人： HAYASHI TAKURO , EBATO AKIHIKO
IPC分类号： G01H3/00 , G10K11/16 , G10K11/178
摘要： PURPOSE:To provide an active muffler which reduces the noise of a device in a three dimensional space by employing a simple constitution. CONSTITUTION:The signals detected by a first sensor 33 located on a wall surface 32 of an objective device 31 and a second sensor 35 which detects the vibration of the vibrating surface of a speaker 34 are added in an adding section 40 and a power amplifier 44 of the speaker 34 is controlled so that an error signal 43, which is the sum of the signals, becomes zero or a minimum by an adaptive control section 36. By this control, the strength of the radiated sound of the speaker 34 is made to coincide with the strength of the sound radiated by the wall surface 32 of the device 31. Moreover, since the speaker 34 is directly placed on the surface 32, the radiated sound of the speaker 34 adds in a reversed phase. Thus, the radiated acoustic power of the surface 32 of the device 31 is reduced and the noise in three dimensional space is also reduced.

65. 发明专利

JP2003157084A ACTIVE SOUND MUFFLING APPARATUS AND ACTIVE SOUND MUFFLING METHOD 审中-公开
公开(公告)号：JP2003157084A
公开(公告)日：2003-05-30
申请号：JP2001355100
申请日：2001-11-20
申请人： TOSHIBA CORP
发明人： NISHIMURA OSAMU , EBATO AKIHIKO
IPC分类号： G01H3/10 , G10K11/178
摘要： PROBLEM TO BE SOLVED: To provide an active muffling apparatus which controls sound power in a space to the minimum by positioning a probe for measuring acoustic intensity in the space at an optimum position. SOLUTION: The active sound muffling apparatus is provided with a detector 20 which is arranged near a source of sound to be reduced and which measures information on the sound to be reduced, a controlled sound source 42 which is arranged in the space and which outputs sound waves with a prescribed amplitude and a prescribed phase, an acoustic intensity probe 35 which has microphones 35a, 35b and measures acoustic intensity in the space, an acoustic intensity probe apparatus 30 for positioning the acoustic intensity prove 35 at a prescribed measuring point around the controlled sound source 42 and a controlling part 50 for controlling output of the controlled sound source 42 based on the acoustic intensity and the information on the sound to be reduced.

66. 发明专利

JPH11248591A METHOD AND DEVICE FOR DETECTING WATER LEAKING POSITION 失效
公开(公告)号：JPH11248591A
公开(公告)日：1999-09-17
申请号：JP5200098
申请日：1998-03-04
申请人： TOKYO METROPOLITAN GOV , TOSHIBA CORP
发明人： YONEZAWA YOSHIMASA , SANO TORU , TAZAKI TAKUYA , EBATO AKIHIKO , SATO YOSHIYUKI , TAMAKI SHOJIRO
IPC分类号： G01F1/00 , G01M3/24
摘要： PROBLEM TO BE SOLVED: To provide a method and device by which a water leaking position can be detected with accuracy without relying upon the sense of human beings nor making the constitution more complicated. SOLUTION: A device for detecting water leaking position is provided with a water leaking sound detecting sensor 12 attached to an underground pipeline 11, a plurality of pairs of ground surface vibration detecting sensors 14-18 arranged on the surface of the ground, a means 20 which removes noise signals from the output signals of the sensors 14-18 through cross correlation processing, a means 21 which computes the active intensity of water leakage energy transmitted to the surface of the ground by using paired cross correlation-processed signals, a means 22 which computes a frequency-weighted reactive intensity by using the cross correlation-processed signals and other signals from a time integrating section 24, and a means 23 which finds a water leaking position specifying vector by using the magnitude of the reactive intensity for the size of the vector and the polarity of the active intensity for the direction of the vector.

67. 发明专利

JPH10149172A PRIVATE POWER GENERATING DEVICE WITH ACTIVE SOUND ELIMINATING DEVICE, AND TRANSFORMER 失效
公开(公告)号：JPH10149172A
公开(公告)日：1998-06-02
申请号：JP25245197
申请日：1997-09-17
申请人： TOSHIBA CORP
发明人： HAYASHI TAKURO , EBATO AKIHIKO
IPC分类号： F02B77/00 , G10K11/16 , G10K11/178 , H03H17/00 , H03H21/00
摘要： PROBLEM TO BE SOLVED: To provide the active sound eliminating device which can reduce the whole noise radiated by equipment, etc., placed in a three-dimensional space under automatic control in simple constitution. SOLUTION: This device is equipped with an additional sound source (speaker) 32 arranged nearby a noise source 31, acoustic power measuring means (microphones 33 and 34) which measure the acoustic power from the additional sound source 32 due to interference between the noise source 31 and additional sound source 32, and a control means 35 which controls the output of the additional sound source 32 so as to minimize the acoustic power measured by the means. Consequently, control for minimizing the acoustic power radiated by the additional sound source is performed, and consequently the total acoustic power of the noise source and additional sound source becomes minimum. Consequently, the noise radiated by the noise source to the circumference is effectively reduced, which greatly contributes greatly to sound elimination.

68. 发明专利

JPH07134590A ACTIVE MUFFLER DEVICE 失效
公开(公告)号：JPH07134590A
公开(公告)日：1995-05-23
申请号：JP15392094
申请日：1994-07-05
申请人： TOSHIBA CORP
发明人： EBATO AKIHIKO , HAYASHI TAKURO
IPC分类号： F01N1/00 , G10K11/178
摘要： PURPOSE:To provide an active muffler device capable of actively reducing acoustic power itself three-dimensionally propagating from a sound source. CONSTITUTION:Two pieces of added sound sources 26a, 26b for radiating a sound interfering with the sound three-dimensionally radiated from the sound source 29 are provided on both sides of the sound source 29, and an evaluating microphone 27 is provided in space where the sound radiated from the sound source 29 propagates, and a control system 28 controlling the added sound sources 26a, 26b to minimize the output of the evaluating microphone 27 is provided. The added sound sources 26a, 26b and the evaluating microphone 27 are arranged so that the sound source 29, the added sound sources 26a, 26b and the evaluating microphone 27 are placed at respective vertexes of regular triangles respectively.

69. 发明专利

JPH06214576A ACTIVE SILENCER 失效
公开(公告)号：JPH06214576A
公开(公告)日：1994-08-05
申请号：JP635293
申请日：1993-01-19
申请人： TOSHIBA CORP
发明人： HAYASHI TAKURO , EBATO AKIHIKO
IPC分类号： F01N1/06 , G10K11/16 , G10K11/178
摘要： PURPOSE:To provide an active silencer which can performs silencing so that sound power put out from a whole surrounding of a device is made the minimum for a noise source of a device and the like arranged in an open space. CONSTITUTION:In an active silencer which reduces a sound generated by a controlled device 1 arranged in an open space by putting out a sound from an added sound source 5, a microphone 6 for evaluating a sound is placed at the prescribed position in the open space, a control system 7 which controls amplitude and phase of a sound generated by the added sound source 5 so that sound pressure is made the minimum at the prescribed position is provided, a distance between the controlled device 1 and the added sound source 5 is set approximately to a wavelength of one third or less as long as that of a reduced sound, while the microphone 6 for evaluation is placed at approximately same distance from both the controlled device 1 and the added sound source 5.

70. 发明专利

JP2006342592A MOBILE SOUNDPROOF SYSTEM AND BOARD FENCE 审中-公开
公开(公告)号：JP2006342592A
公开(公告)日：2006-12-21
申请号：JP2005169739
申请日：2005-06-09
申请人： KAJIMA CORP , TOSHIBA CORP
发明人： MATSUI NOBUYUKI , TSURUTA MASAHIRO , ISHII MAKOTO , EBATO AKIHIKO , HIRUMA TAKAHIRO
IPC分类号： E04G21/32 , E04B1/82 , G10K11/16 , G10K11/178
摘要： PROBLEM TO BE SOLVED: To provide a comparatively simple soundproof board fence used for the noise preventive measures for reducing various noises from construction/civil engineering works, etc. , which is flexibly and reliably available for preventing the diversified kinds of noises including those of low frequency bands in a wide range of construction/civil engineering works performed by a single worker to by large-sized work machinery, can be installed and removed within a short time and easily moved according to the progress of the works. SOLUTION: This mobile board fence has a frame structure of a soundproof panel 3 and a mobile light support frame 2, or a bellows type flexible soundproof panel structure. A simple mobile soundproof fence 1 of this structure that can change its sound preventive range (both position and form) according to movable sound generating places is installed at both sides of movable sound generating places, and an active silencer 4 is provided at the top and bottom of the mobile soundproof fence 1 for sending out sounds in the reversed phase of noises from its sound source speaker to attenuate sounds diffracting from the fence 1. Alternatively, the lower part of the fence 1 is made of sound insulators 5. Thus various noises including those of low frequency bands are attenuated by passive and active sound muffling effects by the soundproof panels. COPYRIGHT: (C)2007,JPO&INPIT

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