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1. 发明专利

JPH0552696A UNBALANCE MEASUREMENT EQUIPMENT OF ROTOR 失效
公开(公告)号：JPH0552696A
公开(公告)日：1993-03-02
申请号：JP21365291
申请日：1991-08-26
申请人： NISSAN MOTOR
发明人： KANEKO TAKANOBU , SUGANO KESAO , FUKUNAGA ISAO , ITOMI TOMEO
IPC分类号： G01M1/16
摘要： PURPOSE:To provide an unbalance measurement equipment of a rotor, for carrying out accurate and easy measurement. CONSTITUTION:A rotation detection means 50 for detecting the rotational speed of a rotor, a vibration detection means 51 for detecting the vibration of the rotor, a Fourier transformation means 52 for transforming signals of the means 50, 51, and a vector calculation means 53, by which vectors composed of the phase of the signals of the means 50, 51 and of the size of the signal of the means 51 are calculated based on the transformation result, and by which a second vector measured at a position of 0 deg. to a first vector measured without a dummy weight, and a third vector measured at a position of 180 deg., are determined, are provided. An unbalance calculation means 54 for determining the unbalance amount as well as the position of the rotor in relation to the first vector, a judging means 55, for carrying out calculation by the means 54 when the angle between a fourth vector composed of a middle point between the points of the second and the third vectors and of an origin, and the first vector is not larger than a predetermined level, and for outputting a non-signal when it is larger than the predetermined level, and a display means 56 for displaying the calculation result, are also provided.

2. 发明专利

JPH07190876A BALANCE MEASURING APPARATUS OF ROTATING BODY 失效
公开(公告)号：JPH07190876A
公开(公告)日：1995-07-28
申请号：JP33206793
申请日：1993-12-27
申请人： NISSAN MOTOR
发明人： KANEKO TAKANOBU , SUGANO KESAO
IPC分类号： G01M1/20 , G01M1/22
摘要： PURPOSE:To precisely measure the unbalance of a rotating body such as a tire or the like. CONSTITUTION:A rotation detection means 1 which detects the rotating state of a tire attached to a vehicle body is installed. A vibration detection means 2 which detects a vibrating state when the tire is turned is installed. A frequency analysis means 3 by which the detection signal of the rotation detection means 1 and the detection signal of the vibration detection means 2 are frequency- analyzed is installed. A rotation primary operation means 4 by which a rotation primary frequency is found from the output signal of the frequency analysis means 3 is installed. A phase-difference operation means 5 by which the phase difference between a rotation and a vibration at a rotation primary frequency is found is installed. A fluctuation-peak detection means 6 by which the peak of a functuation in a vibration power spectral value at the rotation primary frequency is detected from the output signal of the rotation-frequency analysis means 3 is installed. A peak-cycle detection means 7 which detects the cycle of the peak of the fluctuation in the vibration power spectral value is installed. An unbalance operation means 8 by which an unbalance amount and an unbalance phase are operated according to the cycle of the peak is installed.

3. 发明专利

JPH0540070A DEVICE FOR MEASURING UNBALANCE OF ROTOR 失效
公开(公告)号：JPH0540070A
公开(公告)日：1993-02-19
申请号：JP19539691
申请日：1991-08-05
申请人： NISSAN MOTOR
发明人： SUGANO KESAO , KANEKO TAKANOBU
IPC分类号： G01M1/24 , G01M1/16
摘要： PURPOSE:To carry out correct measure with a simple operation, by controlling automatically the gain of an amplifier and the cut-off frequency of a filter to correction values, on the basis of a detected judgment result. CONSTITUTION:A Fourier transform means 54 makes detection signals of a rotation detecting means 50 and an oscillation detecting means 52 given through the first and second filter amplification means 51, 52, Fourier transform respectively; and outputs them to an unbalance operation means 55 for operating the unbalance quantity of a rotor and that position. On the other hand, the means 54 outputs them also to a judging means 56. In the means 56, the peak frequency of a frequency spectrum transforming the detection signal of the means 50 is detected, and whether the value transforming the detection signal of the means 52 is in a fixed range or not is judged. The cut-off frequencies of the means 51, 53 and the gain of the means 53 are automatically controlled according to the peak frequency, on the basis of the judgment result, in a controlling means 57. Before the real measurement, the states of the detection signals of the means 50, 51 can be automatically controlled in the states suitable for the measurement, and the unbalance measurement can be carried out correctly and in a short time.

4. 发明专利

JPH08159906A TIRE-BALANCE MEASURING APPARATUS 失效
公开(公告)号：JPH08159906A
公开(公告)日：1996-06-21
申请号：JP30080594
申请日：1994-12-05
申请人： NISSAN MOTOR
发明人： KANEKO TAKANOBU , SUGANO KESAO
IPC分类号： G01M1/28
摘要： PURPOSE: To provide a tire-balance measuring apparatus by which a drop in a shake and that in a shimmy can be realized simultaneously. CONSTITUTION: The rotation of a tire is detected by optical fiber sensors 10, 10'. The up-and-down vibration and the front and rear vibration of the tire are detected by accelerometers 7A, 7B, 7'A, 7'B. On the basis of values of their detection signals, the correction vector of an imbalance is operated by an analytical-device body 13.

5. 发明专利

JPH05172681A UNBALANCE MEASURING DEVICE OF ROTARY BODY 失效
公开(公告)号：JPH05172681A
公开(公告)日：1993-07-09
申请号：JP34285791
申请日：1991-12-25
申请人： NISSAN MOTOR
发明人： SUGANO KESAO , KANEKO TAKANOBU
IPC分类号： G01M1/16
摘要： PURPOSE:To provide the title device capable of easily and accurately realizing the optimum rotational speed and precisely measuring the unbalance of a rotary body. CONSTITUTION:A max. value detecting means 105 detecting the max. value of the acceleration power spectrum operated from the Fourier transform result of the acceleration signal of the vibration of a rotary body, an optimum rotational speed detecting means 106 for detecting the rotational speed obtained when the acceleration power spectrum value becomes max., that is, the optimum rotational speed to store the same and a display means 107 for displaying whether the actual rotational speed of the rotary body almost coincides with the optimum rotational speed are provided. By automatically measuring the optimum rotational speed and displaying whether the actual rotational speed almost coincides with the optimum rotational speed, the work matching the actual rotational speed with the optimum rotational speed can be facilitated and the precise measurement of unbalance and the drastic reduction of the number of working processes are enabled.

6. 发明专利

JPH08128877A ENGINE MEASURING DEVICE 失效
公开(公告)号：JPH08128877A
公开(公告)日：1996-05-21
申请号：JP26678394
申请日：1994-10-31
申请人： NISSAN MOTOR
发明人： MORIYAMA AKINOBU , SUGANO KESAO , TSUBOMITSU KOUTA , YASUHARA SHIGEFUMI
IPC分类号： G01F17/00 , G01M15/00 , G01M15/04
摘要： PURPOSE: To easily measure each item such as a displacement, a compression ratio or the like in a short time after an engine is assembled by a method wherein an acoustic sensor which is mounted via an ignition plug hole is utilized as a volume measuring means of a combustion chamber. CONSTITUTION: A sensor head 9 (an acoustic sensor body) is mounted on an ignition plug hole 14 and a solenoid valve 30a is opened, then an inner section of the sensor head 9 is communicated to the open air via an air introduction pipe 30. In this condition, a crankshaft 7a is rotated. A rotation angle detector for detecting a rotation angle is attached to the crankshaft 7a. In a condition wherein both of an intake valve and an exhaust valve at a position of a compression top dead center also the solenoid valve 30a are closed, a volume of a combustion chamber 8 is measured by a method of the acoustic measurement. A sound source 11 is driven by an oscillator, resonance is generated in the combustion chamber 8 and a cavity 12 which are placed on respective ends of a sound pipe 13. The sound pressure thereof is detected by a microphone 10 to be subjected to the temperature correction so that the volume of the combustion chamber 8 is obtained by the calculation and a displacement of the cylinder is obtained.

7. 发明专利

JPH06207877A TIRE BALANCE MEASURING APPARATUS 失效
公开(公告)号：JPH06207877A
公开(公告)日：1994-07-26
申请号：JP259593
申请日：1993-01-11
申请人： NISSAN MOTOR
发明人： KANEKO TAKANOBU , SUGANO KESAO
IPC分类号： G01M1/16 , G01M17/02
摘要： PURPOSE:To provide tire balance measuring apparatus that can measure tire balance quickly and accurately. CONSTITUTION:Optical fiber sensors 10, 10' measure the number of tire revolutions, acceleration sensors 7, 7' measure tire vibration, and an analyzer 13 analyzes such measured values to count at least the specified number of peaks of variations in the primary vibration spectra of tire revolution. Measurement is completed by judging that tires have stabilized when the specified number of peaks (gamma) are detected within the specified range of + or -beta% from the arithmetic mean of peaks. The amount and position of each imbalance are calculated from the averages of peaks and their phases.

8. 发明专利

JPH05288631A 失效
公开(公告)号：JPH05288631A
公开(公告)日：1993-11-02
申请号：JP8540092
申请日：1992-04-07
申请人： NISSAN MOTOR
发明人： KANEKO TAKANOBU , SUGANO KESAO , TAURA SHINJI , YAMAMOTO KOJI
IPC分类号： G01M1/16 , G01M1/22
摘要： PURPOSE:To obtain an unbalance measuring apparatus for a rotor which enables measurement accurately without being affected by changes in rotational speed during the measurement. CONSTITUTION:A value of the sum of a differential acceleration power spectrum near a primary frequency of rotation is almost the same regardless of whether the rotation changes or not. Based on this observation, an arithmetic means 103 is provided to compute an unbalance value depending on a value added to by the differential acceleration power spectrum in a specified frequency range near the primary frequency of rotation by a rotation 1 value.

9. 发明专利

JPH0534234A MEASURING APPARATUS FOR UNBALANCE OF UNBALANCE OF ROTATING BODY 失效
公开(公告)号：JPH0534234A
公开(公告)日：1993-02-09
申请号：JP19536791
申请日：1991-08-05
申请人： NISSAN MOTOR
发明人： KANEKO TAKANOBU , SUGANO KESAO , FUKUNAGA ISAO , ITOMI TOMEO
IPC分类号： G01M1/24 , G01M1/16
摘要： PURPOSE:To obtain an unbalance measuring apparatus of a rotating body which can easily perform correct unbalance measurement with simple operation. CONSTITUTION:An unbalance measuring apparatus comprises a rotation detecting means 50 for detecting rotation speed of a rotating body, a vibration detecting means 51 for detecting vibration of a support of the rotating body, a Fourier-transform means 52 for Fourier-transforming signals of both means and a calculation means 53 for calculating an unbalance amount and a position of the rotating body from the transformation result. The apparatus further comprises a determination means 54 for determining whether or not signal levels of both means 50, 51 are within a predetermined range, a rotation fluctuation calculating means 55 for calculating a size of the rotation fluctuation of the rotating body from the Fourier-transformation result and a peak calculating means 56 for calculating a peak value of a power spectrum in a signal of the vibration detecting means 51 from the Fourier-transformation result to obtain the maximum value and its frequency of the peak values calculated with respect to different rotation speeds and a display means 57 for display results of the means 53, 54, 55, 56.

10. 发明专利

JPH0518846A TIRE-BALANCE MEASURING DEVICE 失效
公开(公告)号：JPH0518846A
公开(公告)日：1993-01-26
申请号：JP17126391
申请日：1991-07-11
申请人： NISSAN MOTOR
发明人： KANEKO TAKANOBU , SUGANO KESAO
IPC分类号： B60C25/00 , G01M1/28 , G01M17/02
摘要： PURPOSE:To enable an accurate unbalance weight and its position to be measured automatically by determining an amount of change when the amount of change at a rotary primary frequency region of a frequency analysis value is at a preset specified value or near it. CONSTITUTION:The number of rotations of left/right tires 1 is detected by reading a reflection tape 8 which is applied to a wheel 2 with an optical fiber sensor 10 and at the same time a vibration is detected as an acceleration by an acceleration sensor 7 which is fitted to left/right spindles 6 and then amplified 11 and 13 respectively and is fed to an analysis device main unit 12. Then, a rotary primary frequency of the tires 1 is calculated according to a rotary signal by an operation means, the acceleration signal is subjected to frequency analysis by an analysis means, and then a tire rotation balance weight and a balance position are calculated by using the frequency analysis value when it is judged that the amount of change at the rotary primary frequency region which is a frequency-analyzed value is equal to a preset specified value or near it. Therefore, the amount of change at the rotary primary frequency region can be determined and a more accurate measurement with less scattering can be performed.

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