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1. 发明授权

US08456165B2 Device for highly precise synchronization of the NMR transmission frequency to the resonance frequency of an NMR line while taking into consideration a non-constant RF phase 有权
标题翻译：用于在考虑非恒定RF相位时将NMR传输频率与NMR谱线的谐振频率进行高精度同步的装置
公开(公告)号：US08456165B2
公开(公告)日：2013-06-04
申请号：US12662388
申请日：2010-04-14
申请人： Arthur Schwilch , Michael Schenkel
发明人： Arthur Schwilch , Michael Schenkel
IPC分类号： G01R33/48 , G01V3/00
CPC分类号： G01R33/31 , G01R33/36 , G01R33/3607 , G01R33/389
摘要： A device has a first control loop (28) with which a frequency RF of an RF generator is synchronized with a resonance frequency F0 of an NMR line. A phase shifter (22) is provided to rotate the radio frequency phase of the NMR receiver system in the first control loop. The phase shifter is controlled by a second control loop (27) whose input signal comes from a signal extraction stage.
摘要翻译：器件具有第一控制回路（28），RF发生器的频率RF与NMR线的共振频率F0同步。提供一个移相器（22）来旋转第一控制回路中NMR接收器系统的射频相位。移相器由其输入信号来自信号提取级的第二控制回路（27）控制。

2. 发明申请

US20100271025A1 Device for highly precise synchronization of the NMR transmission frequency to the resonance frequency of an NMR line while taking into consideration a non-constant RF phase 有权
标题翻译：用于在考虑非恒定RF相位时将NMR传输频率与NMR谱线的谐振频率进行高精度同步的装置
公开(公告)号：US20100271025A1
公开(公告)日：2010-10-28
申请号：US12662388
申请日：2010-04-14
申请人： Arthur Schwilch , Michael Schenkel
发明人： Arthur Schwilch , Michael Schenkel
IPC分类号： G01R33/48
CPC分类号： G01R33/31 , G01R33/36 , G01R33/3607 , G01R33/389
摘要： A device that comprises an RF generator (29), an NMR transmission (20) and reception system (21) and a first control loop (28), with which the frequency fRF of the RF generator is synchronized with the resonance frequency f0 of an NMR line, wherein, from the signal of the RF generator, a train of excitation pulses (EX) of the repetition frequency fm is generated, with which nuclear spins of a certain resonance frequency of an associated NMR line are excited quasi-continuously (CW) and, in the times between the excitation pulses, the NMR signal is received (AQ), wherein the period time 1/fm is chosen to be much smaller than the relaxation time of the NMR line, preferably shorter than 1/10 of the relaxation time, and the NMR signal UD mixed down into the low-frequency range is used, with the help of the first control loop, to closed-loop-control the value of the transmission frequency (=frequency lock) or the value of the B0 field (=field lock) in such a way that the frequency and phase of the RF generator and the NMR line match as precisely as possible, characterized in that a phase shifter (22) that rotates the radio-frequency phase of the NMR transmission and reception system in the first control loop by the value Δφ is controlled by a second control loop (27) whose input signal comes from a signal extraction stage (25, 26) that extracts the saw-tooth AC component of the signal UD and maintains this input signal at zero by closed-loop control. In this way, the influence of the RF phase on the synchronization process can be taken into consideration to improve the precision with which the resonance frequency of an NMR line is synchronized.
摘要翻译：一种包括RF发生器（29），NMR传输（20）和接收系统（21）以及第一控制环路（28）的装置，RF发生器的频率fRF与RF发生器的谐振频率f0同步 NMR线，其中，根据RF发生器的信号，产生一系列重复频率f m的激励脉冲（EX），与之相关联的NMR线的某个共振频率的核自旋被准星激励（CW ），并且在激发脉冲之间的时间内接收NMR信号（AQ），其中周期时间1 / fm被选择为远小于NMR线的弛豫时间，优选短于NMR线的1/10 松弛时间和混合到低频范围内的NMR信号UD，在第一个控制环路的帮助下，使用闭环控制传输频率（=频率锁定）的值或 B0字段（=字段锁）以这样的方式使频率和相位射频发生器和NMR线路尽可能精确地匹配，其特征在于：使所述第一控制回路中的所述NMR发射和接收系统的射频相位旋转的移相器（22）的值＆Dgr; 由第二控制回路（27）控制，其输入信号来自提取信号UD的锯齿AC分量的信号提取级（25,26），并通过闭环控制将该输入信号保持在零。以这种方式，可以考虑RF相对同步过程的影响，以提高NMR线的共振频率同步的精度。

3. 发明申请

US20080027666A1 Device and method for compensation of magnetic field disruptions in highly homogeneous magnetic fields 有权
标题翻译：用于补偿高均匀磁场中的磁场中断的装置和方法
公开(公告)号：US20080027666A1
公开(公告)日：2008-01-31
申请号：US11878178
申请日：2007-07-23
申请人： Michael Schenkel , Rolf Hensel , Werner Tschopp
发明人： Michael Schenkel , Rolf Hensel , Werner Tschopp
IPC分类号： G06F19/00
CPC分类号： G01R33/3875 , G01R33/389 , G01R33/56509 , G01R33/56563
摘要： A device for compensating field disruptions in magnetic fields of electromagnets with high field homogeneity, in particular, for stabilizing the H0 field of an MR measuring system, comprising at least one field detector (31) for detecting interfering signals (Uin), at least one control loop for processing the detected interfering signals (Uin), and at least one compensation coil (34) to which the detected and processed interfering output signals (Uout) are transferred and which generates a correction field for compensating the interfering signals (Uin), is characterized in that at least one of the control loops comprises a multi-selective filter system (35) which comprises one or more parallel connected selective filter elements whose center frequencies can be tuned either once or in an adaptive fashion to the frequency values of the interfering signals (Uin) to be compensated for, wherein the outputs of these filter elements are connected to at least one of the compensation coils (34). The inventive device permits selective detection of periodic field disturbances with high frequency components while a major part of the existing noise is faded out, thereby increasing the SINO.
摘要翻译：一种用于补偿具有高场均匀性的电磁体的磁场中的磁场中断的装置，特别是用于稳定MR测量系统的H0场，该装置包括至少一个用于检测干扰信号的场检测器（31） / SUB>），用于处理检测到的干扰信号（）中的至少一个控制回路和至少一个补偿线圈（34），检测和处理的干扰输出信号（U _{out ）被传送，并且其产生用于补偿干扰信号（在中）的校正场，其特征在于至少一个控制回路包括多选择滤波器系统（35），其包括一个或多个并联连接的选择滤波器元件，其中心频率可以一次或以适应方式调谐到要补偿的干扰信号（U SUB）的频率值，其中这些过滤元件的输出连接到至少一个补偿线圈（34）。本发明的装置允许选择性地检测具有高频分量的周期性场干扰，而现有噪声的主要部分消失，从而增加SINO。}

4. 发明授权

US07474976B2 Device and method for compensation of magnetic field disruptions in highly homogeneous magnetic fields 有权
标题翻译：用于补偿高均匀磁场中的磁场中断的装置和方法
公开(公告)号：US07474976B2
公开(公告)日：2009-01-06
申请号：US11878178
申请日：2007-07-23
申请人： Michael Schenkel , Rolf Hensel , Werner Tschopp
发明人： Michael Schenkel , Rolf Hensel , Werner Tschopp
IPC分类号： G06F19/00
CPC分类号： G01R33/3875 , G01R33/389 , G01R33/56509 , G01R33/56563
摘要： A device for compensating field disruptions in magnetic fields of electromagnets with high field homogeneity, in particular, for stabilizing the H0 field of an MR measuring system, comprising at least one field detector (31) for detecting interfering signals (Uin), at least one control loop for processing the detected interfering signals (Uin), and at least one compensation coil (34) to which the detected and processed interfering output signals (Uout) are transferred and which generates a correction field for compensating the interfering signals (Uin), is characterized in that at least one of the control loops comprises a multi-selective filter system (35) which comprises one or more parallel connected selective filter elements whose center frequencies can be tuned either once or in an adaptive fashion to the frequency values of the interfering signals (Uin) to be compensated for, wherein the outputs of these filter elements are connected to at least one of the compensation coils (34). The inventive device permits selective detection of periodic field disturbances with high frequency components while a major part of the existing noise is faded out, thereby increasing the SINO.
摘要翻译：一种用于补偿具有高场均匀性的电磁体的磁场中的磁场中断的装置，特别是用于稳定MR测量系统的H0场的装置，包括用于检测干扰信号（Uin）的至少一个场检测器（31），至少一个控制回路，用于处理检测到的干扰信号（Uin）;以及至少一个补偿线圈（34），检测和处理的干扰输出信号（Uout）被传送到该补偿线圈，并产生用于补偿干扰信号（Uin）的校正场，其特征在于至少一个控制回路包括多选择滤波器系统（35），其包括一个或多个并联连接的选择滤波器元件，其中心频率可以被调谐一次或以自适应方式调谐到要补偿的干扰信号（Uin），其中这些滤波器元件的输出连接到至少一个补偿线圈（34）。本发明的装置允许选择性地检测具有高频分量的周期性场干扰，而现有噪声的主要部分消失，从而增加SINO。

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