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    • 2. 发明申请
    • NUCLEAR MAGNETIC RESONANCE (NMR) PROBE
    • 核磁共振(NMR)探针
    • US20080258730A1
    • 2008-10-23
    • US11943731
    • 2007-11-21
    • Yuzo FukudaShuya HagiwaraKenji Kawasaki
    • Yuzo FukudaShuya HagiwaraKenji Kawasaki
    • G01R33/34
    • G01R33/3621G01R33/34061G01R33/34092G01R33/3664
    • There is provided a nuclear magnetic resonance probe in which the loss caused by a high frequency cable between a probe coil and a preamplifier is reduced and the sensitivity of an NMR signal is improved. A changeover switch for NMR probe is divided into a switch part including switch elements and a filter part for filtering a switch control signal and an RF transmission signal. The switch part is disposed in a probe body inserted in a magnet of the probe. The filter part is disposed near a measurement apparatus located outside the probe. As for the switch part, a section structure of thickness and width is reduced in conformity with a narrow and slender shape of the probe body. The length of a high frequency cable between the probe coil and the preamplifier is shortened remarkably, and consequently the loss can be reduced.
    • 提供了一种核磁共振探针,其中由探头线圈和前置放大器之间的高频电缆引起的损耗降低,并且提高了NMR信号的灵敏度。 用于NMR探针的转换开关被分为包括开关元件的开关部分和用于滤波开关控制信号和RF发送信号的滤波器部分。 开关部设置在插入探针的磁体中的探针体内。 过滤器部件设置在位于探头外部的测量装置附近。 对于开关部件,厚度和宽度的截面结构根据探头主体的窄而细长的形状而减小。 探针线圈和前置放大器之间的高频电缆的长度显着缩短,从而可以减少损耗。
    • 3. 发明授权
    • Direct digital synthesizer and nuclear magnetic resonance instrument using the same
    • 直接数字合成器和核磁共振仪使用相同
    • US08239433B2
    • 2012-08-07
    • US12120385
    • 2008-05-14
    • Minseok ParkMichiya OkadaShuya HagiwaraHideki Tanaka
    • Minseok ParkMichiya OkadaShuya HagiwaraHideki Tanaka
    • G06F1/02
    • G01R33/3607
    • A DDS (direct digital synthesizer) remarkably increased in the number of frequencies which can be output while maintaining the phase coherency, and an NMR instrument using such a DDS are provided. A DDS including phase accumulators and a phase-to-amplitude modulator is provided with a plurality of phase accumulators operating with fixed phase implements which are equal to powers of 2, a controller for outputting each bit of a frequency tuning word as control data, a plurality of switches for outputting an output of an associated one of the phase accumulators when an associated one of the control data supplied from the controller is 1 and outputting 0 when the associated one of the control data is 0, and an adder for adding up outputs of the switches.
    • DDS(直接数字合成器)在保持相位一致性的同时可以输出的频率数量显着增加,并且提供使用这种DDS的NMR仪器。 包括相位累加器和相位到幅度调制器的DDS设置有多个相位累加器,其以等于2的功率的固定相位工具操作;控制器,用于输出频率调谐字的每个位作为控制数据; 多个开关,用于当从所述控制器提供的所述控制数据中的相关一个之一输出相关联的一个所述相位累加器的输出,并且当所述控制数据中的相关一个为0时输出0;以及加法器, 的开关。
    • 5. 发明申请
    • NMR measurement method and apparatus for same
    • NMR测定方法及装置
    • US20060158186A1
    • 2006-07-20
    • US11330207
    • 2006-01-12
    • Minseok ParkShuya HagiwaraHideta Habara
    • Minseok ParkShuya HagiwaraHideta Habara
    • G01V3/00
    • G01R33/4633G01R33/4625
    • In an NMR measurement method using an NMR apparatus which converts a received signal to digital data using an analog/digital converter and performs a spectral analysis, a folding and aliasing count is decided from a variation in a peak frequency and frequency discrimination is performed. More specifically, a Nyquist frequency is changed to cause a variation of the peak frequency. Since the Nyquist frequency is inversely proportional to an increment of an evolution time t1 which is a feature of multi-dimensional NMR, the Nyquist frequency can be changed by changing the increment of the evolution time. Furthermore, the Nyquist frequency is changed in such a way that a ratio between different Nyquist frequencies is not a ratio between natural numbers n1 and n2 which are greater than 0 and smaller than or equal to the maximum folding and aliasing count.
    • 在使用使用模拟/数字转换器将接收信号转换为数字数据并执行频谱分析的NMR装置的NMR测量方法中,根据峰值频率的变化来确定折叠和混叠计数,并且执行频率鉴别。 更具体地,奈奎斯特频率被改变以引起峰值频率的变化。 由于奈奎斯特频率与作为多维NMR特征的演化时间t 1的增量成反比,可以通过改变演化时间的增量来改变奈奎斯特频率。 此外,奈奎斯特频率的改变使得不同奈奎斯特频率之间的比率不是大于0且小于或等于最大折叠和混叠计数的自然数n 1和n 2之间的比率。
    • 7. 发明申请
    • INSULATION DIAGNOSTIC UNIT AND ALGORITHM FOR ELECTRIC MACHINE, AND EQUIPMENT INCLUDING THE DIAGNOSTIC UNIT
    • 绝缘诊断单元和电机算法及包括诊断单元的设备
    • US20110184672A1
    • 2011-07-28
    • US13012119
    • 2011-01-24
    • Shuya HagiwaraKoji ObataYoshimi KuraharaChie Omatsu
    • Shuya HagiwaraKoji ObataYoshimi KuraharaChie Omatsu
    • G06F19/00
    • G01R31/14G01R31/1272
    • Partial discharge occurring in a continuously operated electric machine is monitored all the time. Even when the electric machine is mounted in mobility equipment, the partial discharge is monitored all the time. An insulation diagnostic unit includes: an instrument that performs spectrum analysis on an output of a sensor disposed near the electric machine; a data table in which an output of a load detection method for the electric machine and an output of the spectrum analysis instrument are recorded; a first routine that obtains a correlation coefficient on the basis of plural data items concerning the magnitudes of a spectrum relevant to a specific frequency, which is obtained by the spectrum analysis instrument, out of data items recorded in the data table, and plural data items of a load obtained at the times of measurement of the plural data items; and a second routine that classifies the noted spectrum relevant to the specific frequency into a spectrum of an environmental electromagnetic wave or a spectrum of an electromagnetic wave due to partial discharge from the electric machine on the basis of the value of the correlation coefficient obtained by the first routine.
    • 持续运行的电机中发生的局部放电始终被监控。 即使电机安装在移动设备中,也会始终监视局部放电。 绝缘诊断单元包括:对设置在电机附近的传感器的输出进行频谱分析的仪器; 数据表,其中记录电机的负载检测方法的输出和频谱分析仪的输出; 基于由频谱分析仪器获得的与特定频率相关的频谱的幅度的多个数据项从数据表中记录的数据项中获得相关系数的第一例程,以及多个数据项 在多个数据项的测量时获得的负载; 以及第二例程,其将与特定频率相关的所述频谱分类为环境电磁波的频谱或由于从电机部分放电而产生的电磁波的频谱,该频谱基于由该电机获得的相关系数的值 第一个例程
    • 9. 发明授权
    • NMR measurement method and apparatus utilizing nyquist frequency changes
    • NMR测量方法和设备利用奈奎斯特频率变化
    • US07282912B2
    • 2007-10-16
    • US11330207
    • 2006-01-12
    • Minseok ParkShuya HagiwaraHideta Habara
    • Minseok ParkShuya HagiwaraHideta Habara
    • G01V3/00
    • G01R33/4633G01R33/4625
    • In an NMR measurement method using an NMR apparatus which converts a received signal to digital data using an analog/digital converter and performs a spectral analysis, a folding and aliasing count is decided from a variation in a peak frequency and frequency discrimination is performed. More specifically, a Nyquist frequency is changed to cause a variation of the peak frequency. Since the Nyquist frequency is inversely proportional to an increment of an evolution time t1 which is a feature of multi-dimensional NMR, the Nyquist frequency can be changed by changing the increment of the evolution time. Furthermore, the Nyquist frequency is changed in such a way that a ratio between different Nyquist frequencies is not a ratio between natural numbers n1 and n2 which are greater than 0 and smaller than or equal to the maximum folding and aliasing count.
    • 在使用使用模拟/数字转换器将接收信号转换为数字数据并执行频谱分析的NMR装置的NMR测量方法中,根据峰值频率的变化来确定折叠和混叠计数,并且执行频率鉴别。 更具体地,奈奎斯特频率被改变以引起峰值频率的变化。 由于奈奎斯特频率与作为多维NMR特征的演化时间t 1的增量成反比,可以通过改变演化时间的增量来改变奈奎斯特频率。 此外,奈奎斯特频率的改变使得不同奈奎斯特频率之间的比率不是大于0且小于或等于最大折叠和混叠计数的自然数n 1和n 2之间的比率。