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    • 1. 发明授权
    • Method and apparatus usable for mining and mineral exploration
    • 可用于采矿和矿产勘探的方法和设备
    • US08497678B2
    • 2013-07-30
    • US12842285
    • 2010-07-23
    • Taras Rudakov
    • Taras Rudakov
    • G01V3/00
    • G01N24/08G01N24/081G01R33/3808G01R33/441G01V3/32
    • A method for mineral analysis of a sample based on detection of NQR and/or Local Field Magnetic Resonance (LFMR) signals from a particular substance within a sample includes: setting a frequency of RF pulses to be approximately equal to one of the NQR or LFMR frequencies of the substance; setting a set of parameters of the RF pulses to be optimal for the substance; setting a set of receiving parameters to be optimal for the substance; tuning the probe to maximum sensitivity for the signals detected at predetermined frequency and/or to maximum power transfer efficiency for RF pulses transmitted with the probe; transmitting the RF pulses with the probe at said optimal level during a transmitting period to irradiate the sample and excite an NQR or LFMR signal in the substance, if present; detecting and processing NQR or LFMR signals emitted by the substance; and calculating the concentration of the substance in the sample.
    • 基于检测来自样品中特定物质的NQR和/或局部场磁共振(LFMR)信号的样品的矿物分析方法包括:将RF脉冲的频率设置为近似等于NQR或LFMR之一 物质的频率; 将RF脉冲的一组参数设置为物质的最佳值; 设置一组接收参数为物质最佳; 将探头调谐到以预定频率检测的信号的最大灵敏度和/或对于与探头一起传输的RF脉冲的最大功率传输效率; 在发射周期期间用探头以所述最佳电平发射RF脉冲以照射样品并激发物质中的NQR或LFMR信号(如果存在); 检测和处理物质发出的NQR或LFMR信号; 并计算样品中物质的浓度。
    • 3. 发明申请
    • Q-factor switching method and apparatus for detecting nuclear quadrupole and nuclear magnetic resonance signals
    • 用于检测核四极和核磁共振信号的Q因子切换方法和装置
    • US20070040556A1
    • 2007-02-22
    • US11438439
    • 2006-05-23
    • Taras RudakovVassili MikhaltsevitchWarrick ChisholmJohn FlexmanPeter Hayes
    • Taras RudakovVassili MikhaltsevitchWarrick ChisholmJohn FlexmanPeter Hayes
    • G01V3/00
    • G01R33/441G01R33/3628G01V3/14
    • A probe (80) for irradiating a sample with RF energy during transmitting periods and detecting an NQR or NMR signal from a substance contained within the sample during receiving periods. The probe (80) comprises a variable impedance unit (20) for changing the Q-factor of the probe and a probe coil. The probe (80) is responsive to powerful RF pulses applied thereto to excite an RF magnetic field in the probe coil during the transmitting periods. The variable impedance unit (20) is controllable to provide a Q-factor for the probe (80) at: (i) an optimal level during a prescribed transmitting period of an RF pulse for irradiating the sample with said RF energy; (ii) a minimal level during a prescribed recovery period immediately following said transmitting period to rapidly dampen transient signals from the probe; and (iii) a maximal level during a prescribed receiving period for detecting an NQR or NMR signal from the target substance if present, immediately following the recovery period. A method for detecting an NQR or NMR signal within a sample using the probe (80) is also described.
    • 用于在发射期间用RF能量照射样品的探针(80),并且在接收期间从包含在样品中的物质检测NQR或NMR信号。 探针(80)包括用于改变探针的Q因子和探针线圈的可变阻抗单元(20)。 探针(80)响应于施加到其上的强大的RF脉冲,以在发射期间激发探针线圈中的RF磁场。 可变阻抗单元(20)是可控制的,以便在以下条件下为探针(80)提供Q因子:(i)在用于用所述RF能量照射样本的RF脉冲的规定的发射周期期间的最佳电平; (ii)紧接在所述传输周期之后的规定的恢复期间的最小电平以快速抑制来自探针的瞬态信号; 以及(iii)在规定的接收期间内,在恢复期之后立即检测来自目标物质(如果存在)的NQR或NMR信号的最大电平。 还描述了使用探针(80)检测样品内的NQR或NMR信号的方法。
    • 5. 发明申请
    • Q-factor switching method and apparatus for detecting nuclear quadrupole and nuclear magnetic resonance signals
    • 用于检测核四极和核磁共振信号的Q因子切换方法和装置
    • US20050116714A1
    • 2005-06-02
    • US10838256
    • 2004-05-05
    • Taras RudakovVassili MikhaltsevitchWarrick ChisholmJohn FlexmanPeter Hayes
    • Taras RudakovVassili MikhaltsevitchWarrick ChisholmJohn FlexmanPeter Hayes
    • G01R33/36G01R33/44G01V3/14G01V3/00
    • G01R33/441G01R33/3628G01V3/14
    • A probe (80) for irradiating a sample with RF energy during transmitting periods and detecting an NQR or NMR signal from a substance contained within the sample during receiving periods. The probe (80) comprises a variable impedance unit (20) for changing the Q-factor of the probe and a probe coil. The probe (80) is responsive to powerful RF pulses applied thereto to excite an RF magnetic field in the probe coil during the transmitting periods. The variable impedance unit (20) is controllable to provide a Q-factor for the probe (80) at: (i) an optimal level during a prescribed transmitting period of an RF pulse for irradiating the sample with said RF energy; (ii) a minimal level during a prescribed recovery period immediately following said transmitting period to rapidly dampen transient signals from the probe; and (iii) a maximal level during a prescribed receiving period for detecting an NQR or NMR signal from the target substance if present, immediately following the recovery period. A method for detecting an NQR or NMR signal within a sample using the probe (80) is also described.
    • 用于在发射期间用RF能量照射样品的探针(80),并且在接收期间从包含在样品中的物质检测NQR或NMR信号。 探针(80)包括用于改变探针的Q因子和探针线圈的可变阻抗单元(20)。 探针(80)响应于施加到其上的强大的RF脉冲,以在发射期间激发探针线圈中的RF磁场。 可变阻抗单元(20)是可控制的,以便在以下条件下为探针(80)提供Q因子:(i)在用于用所述RF能量照射样本的RF脉冲的规定发射周期期间的最佳电平; (ii)紧接在所述传输周期之后的规定的恢复期间的最小电平以快速抑制来自探针的瞬态信号; 以及(iii)在规定的接收期间内,在恢复期之后立即检测来自目标物质(如果存在)的NQR或NMR信号的最大电平。 还描述了使用探针(80)检测样品内的NQR或NMR信号的方法。
    • 7. 发明申请
    • Pulse sequences for exciting nuclear quadrupole resonance
    • 用于激发核四极共振的脉冲序列
    • US20060091883A1
    • 2006-05-04
    • US10518480
    • 2003-06-20
    • Vassili MikhaltsevitchTaras RudakovJohn FlexmanPeter HayesWarrick Chisholm
    • Vassili MikhaltsevitchTaras RudakovJohn FlexmanPeter HayesWarrick Chisholm
    • G01V3/00
    • G01R33/441G01N24/084G01R33/5613
    • An apparatus and a method for producing a multi-pulse sequence for irradiating a substance provided with quadrupole nuclei with either integer or half-integer spins to detect an NQR signal emitted therefrom. The apparatus has pulse sequence generating means adapted to produce a combination of two or more pulse sequences, arranged so that a definite regularity of the phase alteration of pulses in each of the pulse sequences occurs that is equivalent to a shift of spectral components of the pulse sequences in relation to each other. Furthermore, in at least one of the pulse sequences, there are not less than two phases alternating. A preparatory pulse may be included in one of the pulse sequences to reduce the effect of temperature, increase the intensity of the NQR signal and simultaneously eliminate intensity anomalies. Alternatively, the combination of pulse sequences may be different from a combination of PAPS and NPAPS, and none of the pulse sequences contain a preparatory pulse.
    • 一种用于产生用于向具有四极核的物质照射具有整数或半整数自旋的物质的多脉冲序列的装置和方法,以检测从其发射的NQR信号。 该装置具有适于产生两个或多个脉冲序列的组合的脉冲序列发生装置,其被布置为使得发生每个脉冲序列中的脉冲相位变化的确定规律,其相当于脉冲的频谱分量的偏移 相互关联的序列。 此外,在至少一个脉冲序列中,存在不少于两相的交替。 预备脉冲可以包括在脉冲序列之一中以减少温度的影响,增加NQR信号的强度并同时消除强度异常。 或者,脉冲序列的组合可以不同于PAPS和NPAPS的组合,并且脉冲序列都不包含预备脉冲。
    • 9. 发明申请
    • METHOD AND APPARATUS USABLE FOR MINING AND MINERAL EXPLORATION
    • 可用于采矿和矿产勘探的方法和装置
    • US20110018535A1
    • 2011-01-27
    • US12842285
    • 2010-07-23
    • Taras Rudakov
    • Taras Rudakov
    • G01V3/32G01R33/44
    • G01N24/08G01N24/081G01R33/3808G01R33/441G01V3/32
    • A method for mineral analysis of a sample based on detection of NQR and/or NMR signals from a particular substance within a sample includes: setting a frequency of RF pulses to be approximately equal to one of the NQR or NMR frequencies of the substance; setting a set of parameters of the RF pulses to be optimal for the substance; setting a set of receiving parameters to be optimal for the substance; tuning the probe to maximum sensitivity for the signals detected at predetermined frequency and/or to maximum power transfer efficiency for RF pulses transmitted with the probe; transmitting the RF pulses with the probe at said optimal level during a transmitting period to irradiate the sample and excite an NQR or NMR signal in the substance, if present; detecting and processing NQR or NMR signals emitted by the substance; and calculating the concentration of the substance in the sample.
    • 基于检测来自样品中特定物质的NQR和/或NMR信号的样品的矿物分析方法包括:将RF脉冲的频率设置为近似等于物质的NQR或NMR频率之一; 将RF脉冲的一组参数设置为物质的最佳值; 设置一组接收参数为物质最佳; 将探头调谐到以预定频率检测的信号的最大灵敏度和/或对于与探头一起传输的RF脉冲的最大功率传输效率; 在发射周期期间用探头以所述最佳电平发射RF脉冲以照射样品并激发物质中的NQR或NMR信号(如果存在); 检测和处理物质发出的NQR或NMR信号; 并计算样品中物质的浓度。