公开(公告)号：US10591426B2

公开(公告)日：2020-03-17

申请号：US15754489

申请日：2016-08-24

Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION

Inventor： David Geoffrey Miljak ,  Peter John Coghill ,  Jochen Lehmann-Horn ,  Bojan Lovric ,  Richard Yong

IPC: G01N24/08 ,  G01V3/14 ,  G01R33/36 ,  G01R33/422

Abstract: Apparatus including an electrically conductive housing, an electrically non-conducting pipe carrying the slurry through the housing, one or more primary coils each encircling the pipe within the housing and having a capacitor unit coupled thereto with a capacitor unit value chosen so that a primary coil series resonance is formed close to the value of a target magnetic resonance frequency, and for each primary coil, a drive coil and associated electrical network positioned to magnetically couple the drive coil to that primary coil. An impedance monitor coupled to each electrical network measures a complex input impedance thereof. An RF transmitter transmits a signal to one or more of the electrical networks with a frequency approximately equal to the target magnetic resonance frequency, and an RF receiver receives from each electrical network magnetic resonance signals from the target and forms an output signal of detected signals.

公开(公告)号：US10416248B2

公开(公告)日：2019-09-17

申请号：US15754461

申请日：2016-08-24

Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION

Inventor： David Geoffrey Miljak

IPC: G01R33/36 ,  G01N24/08 ,  G01V3/14 ,  G01R33/30 ,  G01G9/00

Abstract: Magnetic resonance (MR) apparatuses, systems and methods for analysing a material. The magnetic resonance apparatuses include a primary loop defining an aperture that the material being analysed can pass through where the primary loop includes at least one pair of electrically conductive segments. The magnetic resonance apparatus also includes a pair of capacitance units corresponding to each pair of electrically conductive segments. Each capacitance unit is conductively connected to two adjoining conductive segments in series so that the primary loop forms a circuit for a radio frequency (RF) current. The primary loop is adapted to: conduct the RF electrical current so that the RF electrical current is predominantly in-phase over the entire primary loop. The magnetic resonance apparatus further includes: a pair of secondary coils corresponding to each pair of capacitor units, electrically conductively isolated from the primary loop. Each secondary coil is oriented to be magnetically coupled to the primary loop such that each secondary coil is capable of exciting RF voltages in the primary loop that are predominantly in-phase with each of the RF voltages excited by the other secondary coils. The magnetic resonance apparatus also includes a primary shield encompassing the primary loop and secondary coils for shielding electromagnetic radiation, the primary shield adapted to allow the material to pass through the aperture defined by the primary loop unobstructed.