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1. 发明专利

JP2000337160A ENGINE DRIVE GENERATING DEVICE 失效
公开(公告)号：JP2000337160A
公开(公告)日：2000-12-05
申请号：JP14765199
申请日：1999-05-27
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： WATABE MASANORI , TAKANO YASUSHI , YOSHIDA CHIKASHI
IPC分类号： F02B63/04 , F01P3/18
摘要： PROBLEM TO BE SOLVED: To make cooling air easy to flow and reduce the pressure loss in a radiator to reduce the noise by setting the radiator within an exhaust duct. SOLUTION: A body case 10 has intake and exhaust ports 10a, 10b for taking in and out the air for cooling a generator 12 having electronic parts, a generator board 13 and an engine 11, and intake and exhaust ducts 20, 30 are mounted on the respective ports 10a, 10b. A radiator 15 for cooling the engine 11 is set on the curved part of the exhaust duct 30 with an angle. The air sucked by a cooling fan 16 is carried in the intake duct 20 through an intake duct port 20a, sent into the body case 10 through the intake port 10a to cool the generator board 13, the generator 12, the engine 11 and the radiator 15, and then released to the outside through the exhaust duct 30. The radiator 15 is arranged on the curved part of the exhaust duct 30 with the angle, whereby the radiator 15 functions as the guide plate for the fluid, so that the fluid can be smoothly carried to prevent the increase in pressure loss.

2. 发明专利

JPH11159340A NOISE LOWERING STRUCTURE FOR EMERGENCY DIESEL GENERATOR 失效
公开(公告)号：JPH11159340A
公开(公告)日：1999-06-15
申请号：JP32413697
申请日：1997-11-26
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： WATABE MASANORI , TAKANO YASUSHI , KUROISHI KAZUO
IPC分类号： F02B77/13 , H02K5/24
摘要： PROBLEM TO BE SOLVED: To lower the noise with the simple structure, to lower the cost while reducing the sound absorbing material attached variable in an intake duct for emergency diesel generator by providing at least specified number or more of guide valves in a duct. SOLUTION: An emergency diesel generator is formed of a main body 3 loaded with an engine 1 and a power generator 2, an intake duct 4, an exhaust duct 5 and an exhaust cover 6, and the generator 2 generates the power with the drive of the engine 1. A fan is rotated so as to intake the air through the intake duct 4, and after cooling the engine 1, the air is discharged from the exhaust cover 6 through the exhaust duct 5. In this case, the intake duct 4 and the exhaust duct 5 are provided with at least one or more guide valves 7. A diffused sound field is thereby formed in the ducts 4, 5 so as to prevent the generation of internal resonance, and while air flow is smoothened so as to lower the fluid noise. The guide valve 7 is formed into a curved shape, and width of the guide valve 7 is set at a ratio of length of an intake port 41 to that of a discharge port 42.

3. 发明专利

JP2000097040A ENGINE-DRIVEN POWER GENERATING SET 失效
公开(公告)号：JP2000097040A
公开(公告)日：2000-04-04
申请号：JP26278098
申请日：1998-09-17
申请人： HITACHI LTD , HITACHI ENG SERVICE
发明人： TAKANO YASUSHI , WATABE MASANORI , KUROISHI KAZUO
IPC分类号： F01P5/06 , F02B63/04 , F02B77/13
摘要： PROBLEM TO BE SOLVED: To calm an engine-driven power generating set in structural terms and compatibly establish the enhancement of the cooling efficiency with suppression of noise while a stress laid on the layout of a radiator and/or fan. SOLUTION: An engine-driven power generating set is configured so that a generator 12, engine 11, radiator 15, and fan 16 are installed inside a body case 10 equipped with an inlet port 10a and an exhaust port 10b, wherein the fan 16 is located downstream of the radiator 15, and they are positioned in such a sequence along the passage for cooling wind as from upstream, the inlet port 10a, generator 12, radiator 15, engine 11, and exhaust port 10b. Also a counterflow preventing means is furnished for the cooling wind having passed the radiator 15, for example a bulkhead. This allows the enhancement of the cooling efficiency of the engine and generator and a decrease in the noise simultaneously, and noise reduction can be accomplished at a low cost through small size construction of a sound absorbing duct and cooling fan.

4. 发明专利

JP2011226790A Sound production device 有权
标题翻译：声音制作装置
公开(公告)号：JP2011226790A
公开(公告)日：2011-11-10
申请号：JP2010093854
申请日：2010-04-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SETO SHINJI , HIRAKU KENJI , TABE YOSUKE , MATSUBARA KENICHIRO , TAKANO YASUSHI
IPC分类号： G01M17/007 , G01H17/00 , G10K15/04
CPC分类号： G10K15/02 , G01H17/00
摘要： PROBLEM TO BE SOLVED: To provide a sound production device that can produce a vehicle sound with a specific sound component changed among a plurality of sound components occurring while a plurality of parts installed on a vehicle are in operation.SOLUTION: A sound production device 1 comprises: current sound acquisition means 2 for acquiring sound pressure data of a vehicle sound occurring on a vehicle; current part-attributable sound calculation means 4 for calculating a current part-attributable sound occurring due to a specific part in a vehicle sound; current part-attributable sound removal means 3 for calculating a current part-removed sound in which the current part-attributable sound is removed from the vehicle sound; new part-attributable sound calculation means 5 for calculating a new part-attributable sound generated by changing the current part-attributable sound; synthetic sound production means 6 for producing a sound pressure waveform of a synthetic vehicle sound in which the new part-attributable sound is combined with the current part-removed sound; and synthetic sound generating means 7 for generating a sound based on the sound pressure waveform of the synthetic vehicle sound.
摘要翻译：要解决的问题：提供一种声音产生装置，其能够产生在安装在车辆上的多个部件操作时发生的多个声音成分中具有特定声音成分的车辆声音。解决方案：声音产生装置1包括：当前声音获取装置2，用于获取在车辆上发生的车辆声音的声压数据; 用于计算由于车辆声音中的特定部分而发生的当前部分归因声音的当前零件归一化声音计算装置4; 用于计算当前部分归因声音从车辆声音中去除的当前部分消除声音的当前部分归因声音去除装置3; 用于计算通过改变当前的部分归因声音而产生的新的部分归因的声音的新的部分归因声音计算装置5; 用于产生合成车辆声音的声压波形的合成声音产生装置6，其中新的部分归因声音与当前部分消除的声音组合; 以及用于基于合成车辆声音的声压波形产生声音的合成声音产生装置7。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2003170827A ROLLING STOCK 审中-公开
公开(公告)号：JP2003170827A
公开(公告)日：2003-06-17
申请号：JP2001373525
申请日：2001-12-07
申请人： HITACHI LTD
发明人： MUTO DAISUKE , TAKANO YASUSHI , MASAI KENTARO , TAKECHI MICHIFUMI , MAKINO KAZUHIRO
IPC分类号： B61D17/10 , B61D49/00 , G10K11/16
摘要： PROBLEM TO BE SOLVED: To provide a body of high-speed rolling stock expected as a low-cost, safe and fuel-efficient transport system, capable of reducing propagation of vibration generated from a truck with a main electric motor without largely increasing a work schedule or body weight to effectively reduce passenger room noise (rolling stock-in/out noise) during high-speed traveling, which is generated in the case of the lightening of the rolling stock in order to prevent increase of a shock to a track, increase of an operation power ratio cost or the like accompanying speed-up of the rolling stock. SOLUTION: This rolling stock has a lower floor, a floor joist connected to an upper part of the lower floor, and a passenger room floor supported by the floor joist. In the double floor structure of the rolling stock, a ratio between an equivalent plate thickness of the lower floor in a connection point between the lower floor and the floor joist, and a plate thickness of the floor joist does not coincides. COPYRIGHT: (C)2003,JPO

6. 发明专利

JP2002161897A CENTRIFUGAL FLUID MACHINERY 失效
公开(公告)号：JP2002161897A
公开(公告)日：2002-06-07
申请号：JP2000364279
申请日：2000-11-30
申请人： HITACHI LTD
发明人： TAKANO YASUSHI , WATABE MASANORI , KOBAYASHI HIROMI
IPC分类号： F04D27/00 , F04D29/42 , F04D29/66
摘要： PROBLEM TO BE SOLVED: To realize a low noise with an inexpensive structure while maintaining a high efficiency in a centrifugal fluid machinery. SOLUTION: A resonance frequency in a flow passage space including gap spaces 7, 8 between a centrifugal impeller 2 and casings 12, 13 is analyzed. When a blade passing sound frequency N×Zi generated in the case where the centrifugal impeller 2 is rotated at a rotation frequency N or n degree higher harmonic component n×N×Zi is coincident with the resonance frequency f obtained by an analysis, it is judged whether or not a noise is amplified. Thereby, an operation at a singular or plural rotation frequency at which the noise obtained by this judgment amplifies or a rotation frequency near the rotation frequency is avoided.

7. 发明专利

JP2002112505A GENERATOR FOR AUTOMOBILE AND TONE QUALITY EVALUATING METHOD FOR ROTARY MACHINE 失效
公开(公告)号：JP2002112505A
公开(公告)日：2002-04-12
申请号：JP2000300549
申请日：2000-09-28
申请人： HITACHI LTD
发明人： TAKANO YASUSHI , SASAKI SUSUMU , INABA TORU , WATANABE MASATOSHI
IPC分类号： G01H3/00 , F04D29/66 , H02K9/06
摘要： PROBLEM TO BE SOLVED: To improve the tone of a generator for a vehicle by making noise correspond to the physical quantity of the tone of the generator. SOLUTION: Noise is divided into a plurality of bands, and the maximum level bands are detected in which the noise level becomes largest in each of a plurality of the divided frequency ranges. To make all the center frequencies of the maximum level bands fall in the range between the given values of a lower limit F1 and an upper limit F2, the value (N2×F1)/(N1×F2) is maintained to be between 0.9 or larger and 1.1 or smaller, when the number of blades of one fan having less pieces of blades is set as N1, and that of blades of the other fan having more pieces of blades is set as N2, or a pair of fans.

8. 发明专利

JPH09166986A ACTIVE NOISE CONTROLLER 失效
公开(公告)号：JPH09166986A
公开(公告)日：1997-06-24
申请号：JP32879395
申请日：1995-12-18
申请人： HITACHI LTD
发明人： OKI KATSUO , SHIMOIDE SHINICHI , TAKANO YASUSHI , WATABE MASANORI , TSUKAGUCHI TAMOTSU , OGURO TAKAHIRO , KOIZUMI SHIGERU , KURIHARA KEIICHI
IPC分类号： F01N1/00 , G06F17/10 , G10K11/178 , H03H17/02 , H03H21/00
摘要： PROBLEM TO BE SOLVED: To suppress a howling when plural speakers exist. SOLUTION: Noise information is converted into noise data through a reference signal input sensor 2 and an A/D converter 4. A substraction processing means 18 subtracts the output data of a filter 17 from the noise data. Noise eliminating additional sound data outputted from an adaptive filter 19 are inputted to the filter 17 and a convolution processing is executed. A subtraction processing means 23 similarly subtracts the output data of a filter 22 from the noise data. Noise eliminating additional sound data outputted from an adaptive filter 19 are inputted to the filter 22 and convolution processing is executed.

9. 发明专利

JPH0927776A COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH0927776A
公开(公告)日：1997-01-28
申请号：JP17584395
申请日：1995-07-12
申请人： HITACHI LTD
发明人： SHIMOIDE SHINICHI , TAKANO YASUSHI , OKI KATSUO , WATABE MASANORI , OTA GICHU , HATTORI MORISHIGE
IPC分类号： H03H21/00 , H04B3/23 , H04B7/015
摘要： PROBLEM TO BE SOLVED: To improve voice sharpness and to exactly transmit information to a recipient by working and generating the output signal of a transmission microphone with regard to the component of a surrounding noise signal while using a noise signal removing circuit. SOLUTION: A surrounding noise detection sensor 5 is provided with at a certain position near a transmission microphone 1 so that only the signal of high correlation with the surrounding noise can be detected as much as possible. The output signal of the sensor 5 is supplied to a noise signal removing circuit 4 and inside the circuit 4, corresponding to the electric signal of the surrounding noise of high correlation with the output signal of the sensor 5 among the output signals of the microphone 1, any signal having a phase different almost at 180 deg. from that electric signal and an almost equal amplitude is generated. Inside the circuit 4, this signal and the output signal of the microphone 1 are added and the surrounding noise is removed. Therefore, only a sonic wave uttered from a transmitting person becomes the output signal of the circuit 4 so that the place of the transmitting person can be concealed.

10. 发明专利

JPH08329040A SOUND ENVIRONMENT SIMULATOR 失效
公开(公告)号：JPH08329040A
公开(公告)日：1996-12-13
申请号：JP13004395
申请日：1995-05-29
申请人： HITACHI LTD
发明人： WATABE MASANORI , TAKANO YASUSHI , SHIMOIDE SHINICHI , OKI KATSUO , OTA GICHU , IWASE KOJI , SUZUKI TOSHIO
IPC分类号： G10K15/00 , G01H3/00 , G01H17/00 , G01M3/00 , G01S7/52 , G06F17/00 , G06F17/10 , G06F19/00 , G06Q50/00 , G06Q50/04 , G10L13/00 , G10L13/02 , H03H21/00
摘要： PURPOSE: To simulate and hear a sound after noise countermeasures are taken by performing convolutional operation for respective signals of noises or vibrations detected at plural points by a filter which shows spatial transmission characteristics based upon the contribution rate of a contribution rate analyzing means and reproducing a noise detected at a noise evaluation point. CONSTITUTION: Information on the noise or vibration of equipment l which generates the noise is detected by sensors 2a, 2b, and 2c. The contribution rate analyzing means 4 performs the convolutional operation with a filter coefficient to analyze the contribution rates showing how much the detection signals of the sensors 2a, 2b, and 2c contribute to a microphone installed at the evaluation point at a constant distance from the equipment 1. The contribution rates are distributed to the detection signals of the sensors 2a, 2b, and 2c, and the noise at the evaluation point is synthesized by a sound synthesizing means 5 and outputted to speakers 6a and 6b. Consequently, the sound after noise countermeasures are taken can be simulated and heard.

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