核磁共振探头
By using a non-uniformly wound coil and an integrated shield design, the problem of uneven radio frequency field distribution in traditional nuclear magnetic resonance probes is solved, which improves excitation efficiency and sample detection quality, and enhances detection stability and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU HUAPU RUISHENG TECHNOLOGY CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-17
AI Technical Summary
The solenoid coil of a traditional nuclear magnetic resonance probe has an uneven distribution of radio frequency field due to the edge effect at the end of the coil, which affects the excitation efficiency and sample detection quality.
The coil design employs non-uniform winding, including a first coil and a second coil. By setting the outer dense and inner sparse coil, the magnetic field attenuation at the coil edge is compensated, the magnetic field strength at different positions of the coil is balanced, and combined with an integrated shield and aluminum connection structure, external noise interference and electromagnetic interference are reduced.
It improves the uniformity of the radio frequency field and the quality of sample detection, enhances the stability and accuracy of detection, simplifies the tuning operation of the circuit board, and improves the operating efficiency.
Smart Images
Figure CN224518950U_ABST
Abstract
Claims
1. A nuclear magnetic resonance probe, characterized in that, include: Support frame (1); A solenoid (2) is disposed on the support frame (1); A coil (3) is arranged around the solenoid (2). The coil (3) includes a first coil (31) and two second coils (32), and the two second coils (32) are respectively connected to the two ends of the first coil (31). The first ring portion (31) includes a plurality of first turns (311), which are evenly spaced along the axial direction of the solenoid (2), and the distance between adjacent first turns (311) is D1; The second coil (32) includes at least two second coils (321), which are evenly spaced along the axial direction of the solenoid (2), and the distance between adjacent second coils (321) is D2, where D1 > D2.
2. The nuclear magnetic resonance probe of claim 1, wherein, The nuclear magnetic resonance probe also includes a shield (4) which surrounds the support frame (1) and the coil (3).
3. The nuclear magnetic resonance probe of claim 2, wherein, The nuclear magnetic resonance probe also includes a connecting plate (5), which is fixed to one end of the support frame (1). The side of the connecting plate (5) facing away from the support frame (1) is recessed with a first mounting groove (51). The nuclear magnetic resonance probe also includes a circuit board (6), which is disposed in the first mounting slot (51); The nuclear magnetic resonance probe also includes a cover plate (7), which is connected to the connecting plate (5) and covers the first mounting slot (51) and the circuit board (6); A first through hole (71) is provided through the cover plate (7), and the first through hole (71) corresponds to at least a portion of the circuit board (6).
4. The nuclear magnetic resonance probe of claim 3, wherein, The shield (4) is connected to the connecting plate (5) at its first end and has an opening (41) at its second end; The nuclear magnetic resonance probe also includes a plug (8), which is welded to the second end of the shield (4) and seals the opening (41).
5. The nuclear magnetic resonance probe of claim 3, wherein, The solenoid (2) is located at one end of the support frame (1) away from the connecting plate (5).
6. The nuclear magnetic resonance probe of claim 5, wherein, The solenoid (2) includes a tube body (21) and a support arm (22) connected to the periphery of the tube body (21), and the coil (3) is arranged around the tube body (21); The support frame (1) has a second mounting groove (11) at one end away from the connecting plate (5), at least part of the tube body (21) is located in the second mounting groove (11), and the support arm (22) is fixed to the support frame (1).
7. The nuclear magnetic resonance probe according to any one of claims 3 to 6, characterized in that, The connecting plate (5) has a through mounting hole (52), the cover plate (7) has a through second through hole (72), and the circuit board (6) has a through third through hole (61). Wherein, the second through hole (72) corresponds to and is connected to the third through hole (61), and the third through hole (61) corresponds to and is connected to the mounting hole (52); The support frame (1) is recessed and has a channel (12), and at least part of the mounting hole (52) corresponds to and is connected to the channel (12).
8. The nuclear magnetic resonance probe of claim 7, wherein, The distance D1 between adjacent first turns (311) is 1 mm.
9. The nuclear magnetic resonance probe of claim 7, wherein, The distance D2 between adjacent second turns (321) is 0.7 mm.