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1. 发明专利

JPH0412234A ABNORMAL SOUND EVALUATING DEVICE 失效
公开(公告)号：JPH0412234A
公开(公告)日：1992-01-16
申请号：JP11308690
申请日：1990-04-28
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： MATSUOKA HISANAGA , KATO MASAHIKO , KATO MASANORI , WAKAHARA KAORU
IPC分类号： G01M99/00 , G01H17/00
摘要： PURPOSE:To obtain the evaluation value which is exact and has reproducibility by converting a sound from an abnormal sound generation source into an electric signal by a microphone, calculating an envelope of a signal by eliminating a noise component by a filter, and calculating the evaluation value of an abnormal sound based on the envelope. CONSTITUTION:A sound caught in a car room is converted into a voltage being proportional to sound pressure by a microphone 1, a noise component is eliminated through a BPF 2, and a pulsating component being a feature of a jingle sound is extracted. Subsequently, in an envelope calculating circuit 3, an envelope of a signal which passes through the BPF 2 is calculated. Next, by a BPF 4, only the component of 50 - 200Hz in an output signal of the circuit 3 passes through. Thereafter, an output voltage Va' of the BPF 2, an output voltage Vb' of the circuit, and an output voltage Vc' of the BPF 4 are led to an RMS value calculating circuit 5, and the respective RMS values Va - Vc are calculated. In an evaluation function value arithmetic circuit 6, by using variables of the inputted RMS values Va - Vc, an evaluation value G is derived by G = Va. Vb/Vc. Subsequently, a logarithm of the evaluation value G is calculated by a logarithmetic converter 7, and displayed by a display 8.

2. 发明专利

JPH05288758A 失效
公开(公告)号：JPH05288758A
公开(公告)日：1993-11-02
申请号：JP9283992
申请日：1992-04-13
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： KATO MASAHIKO , MATSUOKA HISANAGA , YAMADA TOMOJI , KATO MASANORI , WAKAHARA KAORU
IPC分类号： G01P3/44
摘要： PURPOSE:To obtain a velocity measuring apparatus which includes phase data in an output signal when the sensor output is a sine wave, thereby to improve the resolving power for the measurement of the velocity. CONSTITUTION:The angular velocity measuring apparatus is comprised of contactless velocity sensors 211, 212 which output sine waves of the frequency proportional to the rotational speed of gears 201, 202 to be measured, preamplifiers 213, 214 for amplifying the outputs of the sensors, and a signal processor 22. In a first embodiment, after the spectrum on one side of the sensor output which is Fourier-transformed is operated by the signal processor 22, the spectrum is subjected to the inverse Fourier-transform to operate a real part analyzing signal and an imaginary part analyzing signal which constitute a pair of Hilbert's transformation. When the angle defined by the real part analyzing signal and the imaginery part analyzing signal is differentiated in time, the angular velocity of the gear is calculated. According to a second embodiment, the operation in the domain of time is used in place of the Fourier- transform, one-side spectrum and inverse Fourier-transform.

3. 发明专利

JPH0346000A SIMULATED SOUND GENERATING DEVICE FOR CONVEYANCE 失效
公开(公告)号：JPH0346000A
公开(公告)日：1991-02-27
申请号：JP18088889
申请日：1989-07-13
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： EGAMI TSUNEYUKI , HIGASHIYAMA YOJI , KATO MASANORI , ASAI MAKOTO , KANAMARU KUNIO , ONO MASAHIDE
IPC分类号： G10K15/04
摘要： PURPOSE:To generate an optional simulated sound in quick response to the driving state of a vehicle by providing a parameter storage means which can be accessed at random instantaneously. CONSTITUTION:This device is equipped with a control means 5 which grasps the driving state detected by a driving state detecting means 4 and indicates one group of composite parameters among plural groups of composite parameters stored in a parameter storage means 6 to a composing means 7 and speakers 301 - 303 which reproduce a simulated sound with a signal of composite sound from the composing means 7. Therefore, one group of composite parameters corresponding to the driving state is read out from the parameter storage means 5 which can be accessed at random instantaneously and those composite parameters are used to synthesize the simulated sound. Consequently, simulated sounds are reproduced in quick response to momentary variation of the driving state.

4. 发明专利

JPS61213637A MEASURING INSTRUMENT FOR ACOUSTIC INFORMATION 失效
公开(公告)号：JPS61213637A
公开(公告)日：1986-09-22
申请号：JP5523985
申请日：1985-03-19
申请人： NIPPON SOKEN , TOYOTA MOTOR CORP
发明人： TANAKA KATSUYUKI , KATO KAZUKI , KATO MASANORI , KUWAKADO SATOSHI , HASEGAWA KOICHI , HATTORI HIBIKI
IPC分类号： G01H3/00
摘要： PURPOSE:To take measurement with high precision without disordering a sound field by operating a driving means when a control signal is outputted and moving a carriage and a holding member to specific position in an area surrounded with a frame member, and measuring an acoustic state with a signal from a sound sensing member. CONSTITUTION:A scanning device 1 is equipped with the frame member 10 incorporated surrounding the area to be measured, the carriage 17 which moves horizontally along the member 10, the holding member 18 for a microphone 4 which moves vertically along the carriage 17, and pulse motors 15 and 16 which drive the carriage 17 and holding member 18. A manual operating device 3, on the other hand, outputs a signal for determining the scanning area of the microphone manually and an interface 2 outputs driving pulse signals to the motors 15 and 16 on the basis of a command from the operating device 3 or microcomputer 5. Further, the computer 5 outputs a command for outputting the result of acoustic measurement to a color plotter 7 and a printer 8 on the basis of a signal from an analyzer 6.

5. 发明专利

JPH04347312A NOISE PREVENTION DEVICE 失效
公开(公告)号：JPH04347312A
公开(公告)日：1992-12-02
申请号：JP14538691
申请日：1991-05-21
申请人： NIPPON DENSO CO , NIPPON SOKEN
发明人： GOTO HIROYUKI , KOHAMA TOKIO , NISHIO YOSHITAKA , KATO MASANORI , TANAKA KATSUYUKI , OHARA YASUSHI
IPC分类号： F01N1/00 , F02M35/12
摘要： PURPOSE:To form a noise prevention device with a simple structure, and small energy consumption, also capable of reducing intake noise in a wide frequency range. CONSTITUTION:A enclosed chamber 22 is connected to the side wall of an engine intake pipe 1 through a small diameter part 21 so as to form a resonator 2, and a piezoelectric bimorph type vibratory plate 3 is provided on the opening port of a bulkhead 23 in the enclosed chamber 22 of the resonator 2. The vibratory plate 3 is vibrated by a driving signal outputted from a driving control circuit 4. In the driving control circuit 4, original intake pulsation is predicted by an engine rotational speed, a load, and the like, and the driving signal is transmitted to the vibratory plate 3 so as to output control noise. The control noise is synthesized with resonance noise generated in the enclosed chamber 22, and sound pressure of the synthesized noise is in antiphase condition with nearly the same amplitude as that of intake pulsation pressure so as to offset the pulsation pressure effectively, and reduce intake noise.

6. 发明专利

JPS6256995A ACTIVE SILENCER 失效
公开(公告)号：JPS6256995A
公开(公告)日：1987-03-12
申请号：JP19664085
申请日：1985-09-05
申请人： NIPPON SOKEN , NIPPON DENSO CO
发明人： KATO MASAHIKO , KATO MASANORI , KUWAKADO SATOSHI , TANAKA KATSUYUKI , ITO KOJI
IPC分类号： B60R11/02 , G10K11/16 , G10K11/178

7. 发明专利

JPS6252349A ACTIVE SOUND DEADENING DEVICE 失效
公开(公告)号：JPS6252349A
公开(公告)日：1987-03-07
申请号：JP19343785
申请日：1985-09-02
申请人： NIPPON SOKEN , NIPPON DENSO CO
发明人： KATO MASAHIKO , KATO MASANORI , KUWAKADO SATOSHI , TANAKA KATSUYUKI , ITO KOJI
IPC分类号： F24F13/02 , G10K11/16 , G10K11/178
摘要： PURPOSE:To obtain the titled device, inexpensive and prominent in immediately responsing property, by a method wherein the output signal of a sound collecting means for noise detection is treated and outputted by a signal treating means while said treated signal is converted by a driving means and is outputted to a sound wave generating means for sound deadening. CONSTITUTION:A sound collecting means 1 for noise detection and sound wave generating means 2A, 2B for deadening sound at a position apart from the source of a noise are provided in a pipeline P to the source of the noise. The signal treating means 5, treating the output signal of the means 1 and outputting the treated signal, is consisting of a model pipeline 52, similar to the pipeline between the means 1 and the means 2A, 2B, the sound wave generating means 51 for model, which sends out the sound into the pipeline 52, and the sound collecting means 53 for model, which receives the sound transmitted into the pipeline 52 and outputs said treated signal. Further, the means 51 is connected to the means 1 while the means 53 is connected to a driving means 8, converting said treated signal and outputting it to the means 2A, 2B as driving signals. Thus, the active sound deadening device, inexpensive and prominent in immediately responsing property, may be obtained.

8. 发明专利

JPH09190537A WHITE LINE DETECTING DEVICE 失效
公开(公告)号：JPH09190537A
公开(公告)日：1997-07-22
申请号：JP320296
申请日：1996-01-11
申请人： NIPPON SOKEN
发明人： KITAGAWA MARE , KATO MASANORI , IMANISHI KATSUYUKI
IPC分类号： G06T1/00 , G06T7/60 , G06T9/20
摘要： PROBLEM TO BE SOLVED: To stably extract a white line lane mark by excluding the influence of blooming and a smear which are generated by means of a bright light source. SOLUTION: An analog image signal obtained by a CCD camera is fetched by an edge detecting circuit arid the edge detecting circuit 10 detects a white line edge based on the change of brightness in an image signal. That is, when the absolute value ΔDi of difference between data Di and Di-1 is larger than a prescribed threshold value A, the probability of the white line edge exists with the output of a comparator 15 as 'one'. The comparators 16 and 17 compare data Di-1 and Di with the threshold value B which is set in the neighborhood of the saturated level of brightness in CCD in parallel with the comparison operation of the comparator 15. In this case, the output of the comparators 16 and 17 becomes 'zero' at the time of Di-1>=B or Di>=B and edge data at that time is made to be inavlid (EDi=0).

9. 发明专利

JPH01117978A SOUND REDUCING DEVICE FOR INTAKE SYSTEM 失效
公开(公告)号：JPH01117978A
公开(公告)日：1989-05-10
申请号：JP27664287
申请日：1987-10-30
申请人： NIPPON SOKEN , NIPPON DENSO CO
发明人： TANAKA KATSUYUKI , OHARA YASUSHI , KATO MASANORI , KUWAKADO SATOSHI , KOHAMA TOKIO , NISHIO YOSHITAKA
IPC分类号： F02M35/12 , F02M35/10 , G10K11/178
摘要： PURPOSE:To positively reduce the sound in an intake system in the revolution region in a wide range by processing the sound in the intake system of an engine according to the revolution speed of the engine and generating the sound corresponding to the result of the processing and allowing said sound to interfere with the sound in the intake system. CONSTITUTION:A microphone 1 as sound detecting means is installed in the suction system 11 of an engine 10. The found in the suction system 11 which is detected by the microphone 1 is converted to an electric signal and inputted into a sound control circuit 2. In the sound control circuit 2, the delaying, amplification, and filtering for the sound signal are carried out according to the signal supplied from a sensor 8 for detecting the revolution speed of the engine 10. Further, the signal supplied from the sound control circuit 2 is outputted into a speaker as sound generating means installed in an air cleaner 4. Therefore, the sound wave which possesses the sound pressure level equal to the sound in the intake system 11 and is in the reverse phase is generated and put into the interference with the sound in the intake system 11, and the sound in the intake system 11 is reduced.

10. 发明专利

JP2882491B2 失效
公开(公告)号：JP2882491B2
公开(公告)日：1999-04-12
申请号：JP31660190
申请日：1990-11-20
申请人： NIPPON SOKEN , NIPPON DENSO CO
发明人： TANAKA KATSUYUKI , KATO MASANORI , OOHARA YASUSHI , KOHAMA TOKIO , NISHIO YOSHITAKA
IPC分类号： F02M35/12 , F01N1/00 , F01N1/06

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