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    • 11. 发明专利
    • Balance tester
    • 平衡测试仪
    • JPS595932A
    • 1984-01-12
    • JP11596782
    • 1982-07-02
    • Shimadzu Corp
    • KAWAMORI YOSHIOMITSUHARA MASAYUKI
    • G01M1/22
    • G01M1/225G01M1/22
    • PURPOSE:To obtain a measured value as quickly as possible by arranging a means of varying the amplification degree of an arithmetic amplifier for amplifying an imbalance signal of a test object so as to reduce the bandwidth of a band pass filter with the passage of time. CONSTITUTION:A band pass filter is entirely composed of an arithmetic amplifier 7, a filter 3, differentiators 10 and 11 and a feed back circuit 16. An amplification degree varying control section 7A of the amplifier 7 varies the duty factor of a control signal of a chopper 22 with the passage of time depending the magnitude of a terminal voltage and a triangular waveform of a capacitor 25 as integration waveform gradually increasing. Therefore, the state of an FET (field effect transistor) 20 is normally ON before a switch 26 is turned ON and finally comes OFF with a gradual decrease in the duty. As a result, the actual resistance value between the connection of resistances 17 and 18 and the earth becomes infinity finally when the switch 26 is ON and the amplification degree of the amplifier 7 varies so that the bandwidth as frequency characteristic of the band pass filter reaches the maximum thereof and gradually reduces with the passage of time.
    • 目的:通过设置用于放大测试对象的不平衡信号的运算放大器的放大度的方法来尽可能快地获得测量值,以便随着时间的流逝减小带通滤波器的带宽。 构成:带通滤波器完全由算术放大器7,滤波器3,微分器10和11以及反馈电路16组成。放大器7的放大度变化控制部分7A改变控制信号的占空因数 随着时间的流逝取决于终端电压的大小和电容器25的三角形波形的斩波器22作为积分波形逐渐增加。 因此,在开关26接通之前FET(场效应晶体管)20的状态通常为ON,并且随着占空比的逐渐降低而最终变为OFF。 结果,当开关26接通并且放大器7的放大程度发生变化时,电阻17与18的连接与地之间的实际电阻值最终变为无穷大,使得带通滤波器的频率特性带宽达到 其最大值随着时间的推移逐渐减小。
    • 13. 发明专利
    • DYNAMIC BALANCING TESTER
    • JPH09257622A
    • 1997-10-03
    • JP6114896
    • 1996-03-18
    • SHIMADZU CORP
    • MITSUHARA MASAYUKI
    • G01M1/16G01M1/34G01M1/38
    • PROBLEM TO BE SOLVED: To correct unbalance by stopping a motor when the number of the first pulses and the number of pulses in correspondence with the rotation of the motor agree and the number of the second pulses and the number of the pules in correspondence with the rotation of a body under test agree, and finding the measured unbalanced position accurately. SOLUTION: The correcting position of a motor rotor 1 is found based on the unbalance angle of the motor rotor 1, which is detected during the rotation driven by a motor 2. A pulse generator 6 outputs the pulses in proportion to the rotation of the motor 2. A proximity switch 5 outputs the pulses in correspondence with the number of the poles of the motor rotor 1. The unbalance angle of the motor rotor 1 is converted into the first pulse number in correspondence with the pulse generator 6 and the second pulse number in correspondence with the number of the poles. When the pulse generator 6 outputs the first pulse number, the first coincidence signal is outputted. When the proximity switch 5 outputs the second pulse number, the second coincidence signal is outputted. The motor 2 is stopped by the AND of the first and second coincidence signals, and the position is found.
    • 17. 发明专利
    • DYNAMIC BALANCING MACHINE
    • JPH0643063A
    • 1994-02-18
    • JP19955492
    • 1992-07-27
    • SHIMADZU CORP
    • MITSUHARA MASAYUKI
    • G01M1/22
    • PURPOSE:To decrease the friction between each bearing part and a body under test and to decrease signal noises by applying a voltage, which offsets the induced voltage caused by the friction between each bearing part and the body under test. CONSTITUTION:Right and left bearing parts 4 and 5 are insulated from the main part of a frame 1 with an insulator I. Offset-voltage generating circuits 11 and 12, which generate the voltage for offsetting the voltage induced by the friction in rotation of a body under test W, are connected between the bearing parts 4 and 5 and the body under test W. The circuits 11 and 12 offset the static electricity generated by the friction between the body under test W and the bearing parts 4 and 5 when the body under test W is rotated and have the measuring circuit for the induced voltage and the generating and feedback controlling circuit for the offset voltage. The dynamic friction coefficient between the bearing parts 4 and 5 and the body under test W is decreased by the offset of the voltages. The noises caused by the friction are alleviated by the outputs of pickups 6 and 7. The accuracy of the measured value of the unbalance is improved with a dynamic-balance measuring circuit 9.
    • 18. 发明专利
    • DYNAMIC BALANCE CORRECTING METHOD
    • JPH04110740A
    • 1992-04-13
    • JP23177990
    • 1990-08-31
    • SHIMADZU CORP
    • MITSUHARA MASAYUKI
    • G01M1/32
    • PURPOSE:To correct the dynamic balance of a large-sized crank shaft effectively by expressing the amount of unbalance of a test body on a polar coordinate or a component coordinate, and fixing an additional weight at a predetermined correction angle. CONSTITUTION:A test body 1 is borne by a bearing and rotated, and its unbalance is sensed by pickups 2, 3, and the revolving speed is sensed using a proximity switch 4 as reference sensor. A pickup signal and a reference signal are fed to an unbalance calculating means 6 to calculate the amount of unbalance and its angle, and on the basis of result from this calculation the additive amount to the test body 1 shall be computed 7. At this time, the additive weight on each correcting surface is determined provisionally while a search is made over a data file 8, and the amount of unbalance and its angle after attachment of weight are calculated. Judgement is made whether a machining correction by drill is practicable, and if yes, the optimum additive weight 12 is demonstrated 10 - if no, the changed weight is computed, and another search is made into the file 8 to determine the optimum additive weight 12. These procedures enable effection correction.
    • 19. 发明专利
    • UNBALANCE CORRECTING DEVICE
    • JPS6435338A
    • 1989-02-06
    • JP19316587
    • 1987-07-31
    • SHIMADZU CORP
    • MITSUHARA MASAYUKI
    • G02B26/12B41J2/44B41J3/00G01M1/32G02B26/10
    • PURPOSE:To make accurate corrections automatically in a short time by sticking electrostatically charged particulates at an unbalance correction position. CONSTITUTION:A proximity switch 11 such as a photosensor detects the reference position of a rotary body S such as a polygon mirror and respective detection signals of the proximity switch 11 and pickups 121 and 122 are supplied to a correction quantity and angle computing element 13 to calculate the unbalance quantity (correction quantity W) of the rotary body S and the position (correction angle theta) of a light point. The calculated values are supplied to a correction quantity controller 22 and the angle adjustment of the rotary body S, irradiating timing, and control over the total number of the electrostatically charged particulates, etc., are so carried out that the electrostatically charged particulates from a charged particle producing device 17 strike on the place where unbalance is caused. Consequently, plus corrections are made accurately and automatically.
    • 20. 发明专利
    • Method and apparatus for measuring imbalance
    • 测量不平衡的方法和装置
    • JPS59178329A
    • 1984-10-09
    • JP5428483
    • 1983-03-29
    • Shimadzu Corp
    • KAWAMORI YOSHIOMITSUHARA MASAYUKI
    • G01M1/22
    • G01M1/22
    • PURPOSE:To dispense with the attaching work of a reference mark and a detector such as a photocell, by a method wherein a sine wave signal is formed from an imbalance signal while a pulse signal in synchronous relation to said formed signal and said pulse signal is used as the reference phase signal for the rotation of an objected to be tested. CONSTITUTION:Because one pulse signal D is generated in a certain definite phase present during one rotation of an object W to be tested, said signal D can be used as the rotation reference phase signal of the object W to be tested. An imbalance measuring circuit 2 inputs the pulse signal D as a reference phase signal and outputs the magnitude and angle of imbalance by said pulse signal D and an imbalance signal A. On the other hand, the pulse signal D is shifted in the phase thereof only in an amount corresponding to the consideration of the arranging position of a stop mechanism 7 and the transmission phase characteristics of a mechanical system and, thereafter, inputted to an AND gate 9 along with a measurement completing signal which becomes a H- level when the measurement of imbalance is completed while the output of said gate 9 is used as the order signal of the stop mechanism 7 to stop the position corresponding to the pulse signal generation of the body W to be tested at the arranged position of the stop mechanism 7.
    • 目的:为了省略参考标记和诸如光电池的检测器的附着工作,通过一种方法,其中正弦波信号由不平衡信号形成,同时与所述形成的信号和所述脉冲信号同步的脉冲信号是 用作被测对象的旋转的参考相位信号。 构成:由于在要测试的对象W的一次旋转期间在一定的定相中产生一个脉冲信号D,所以可以将所述信号D用作要测试的对象W的旋转参考相位信号。 不平衡测量电路2输入脉冲信号D作为基准相位信号,并通过所述脉冲信号D和不平衡信号A输出不平衡的幅度和角度。另一方面,脉冲信号D仅在其相位中偏移 其量对应于考虑到停止机构7的排列位置和机械系统的传动相位特性,然后输入到与门9以及当测量成为H电平的测量完成信号时 在停止机构7的布置位置,使用所述门9的输出作为停止机构7的顺序信号,停止与被测体W的脉冲信号生成对应的位置。