Measuring device for superconducting magnetic resonance magnetic field

Abstract

The utility model discloses a measuring device for a superconducting magnetic resonance magnetic field, which belongs to the technical field of superconducting magnets and comprises a central rotating shaft mounted in an inner cylinder of a superconducting magnet to be measured, two ends of the central rotating shaft are respectively provided with a fixing support, and one end of the central rotating shaft is provided with a first driving mechanism. The first driving mechanism is used for driving the central rotating shaft to rotate; the middle of the central rotating shaft is connected with at least one rotating support, the central rotating shaft can drive the rotating support to rotate, the rotating support is connected with a second driving mechanism, and the second driving mechanism drives the rotating support to swing. The superconducting magnetic resonance magnetic field measuring device provided by the utility model can completely realize automatic measurement, and is simple to operate, strong in adaptability, easy to maintain and higher in accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of superconducting magnets, in particular to a device for measuring superconducting magnetic resonance magnetic fields. Background Art

[0002] Superconducting magnetic resonance imaging (MRI) is a medical imaging technology that utilizes the principles of nuclear magnetic resonance (NMR) to provide high-resolution images of the human body's internal structures. In MRI systems, a uniform and stable magnetic field is crucial for achieving high-quality images. Superconducting magnets are the core components that generate the strong magnetic field in MRI systems, and their performance directly impacts image quality.

[0003] Traditional magnetic field measurement methods often rely excessively on manual operation. For example, Chinese patent CN 206248811 U discloses a magnetic field measurement tool for a magnetic resonance superconducting magnet. This tool uses a crank at the end of the bracket shaft, which is manually cranked to rotate the bracket. The probe is placed on the meniscus, requiring manual adjustment of the probe position each time a measurement is performed. This measurement method has the following limitations.

[0004] 1. Inefficiency: Manual measurement needs to be performed point by point at different locations on the magnet, which is time-consuming and labor-intensive.

[0005] 2. Limited accuracy: Manual operation is difficult to avoid human errors. For example, a slight deviation in the sensor position may lead to inaccurate measurement results.

[0006] 3. Poor consistency: There may be differences in measurement results between different operators or at different time points, affecting the comparability of the data.

[0007] 4. Safety issues: Manual operation may increase the risk of the operator being exposed to strong magnetic fields, especially in high-field strength MRI systems.

[0008] To overcome these limitations, automated magnetic field measurement technology has emerged. Automation can improve measurement efficiency and accuracy, reduce human error, and provide consistent measurement results. However, existing automated measurement devices often suffer from the following issues.

[0009] 1. High cost: High-precision automated measurement equipment is usually expensive, which is not conducive to widespread promotion.

[0010] 2. Complex operation: Some automation equipment is complex to operate and requires professional personnel to operate and maintain.

[0011] 3. Poor adaptability: Some devices are not flexible enough in design and are difficult to adapt to superconducting magnets of different models and sizes.

[0012] 4. Difficulty in maintenance: High-precision equipment often requires regular calibration and maintenance, which increases the cost of use.

[0013] In view of this, it is particularly important to develop an automated magnetic field measurement device that is cost-effective, easy to operate, adaptable and easy to maintain. Utility Model Content

[0014] The technical problem to be solved by the utility model is to design a novel superconducting magnetic resonance magnetic field measuring device, which realizes fully automated measurement, is simple to operate, has strong adaptability, is easy to maintain and has higher accuracy.

[0015] In order to solve the above technical problems, the present invention adopts the following technical solutions: a device for measuring a superconducting magnetic resonance magnetic field, comprising a central rotating shaft installed in an inner cylinder of a superconducting magnet to be measured, the central rotating shaft being coaxially arranged with the inner cylinder of the superconducting magnet to be measured, a fixing bracket being respectively provided at both ends of the central rotating shaft, the fixing bracket being used to fix the central rotating shaft in the inner cylinder of the superconducting magnet to be measured, a first driving mechanism being provided at one end of the central rotating shaft, the first driving mechanism being used to drive the central rotating shaft to rotate;

[0016] The middle portion of the central rotating shaft is connected to at least one rotating bracket. The central rotating shaft can drive the rotating bracket to rotate. The rotating bracket is connected to a second driving mechanism. The second driving mechanism drives the rotating bracket to swing.

[0017] Furthermore, the second driving mechanism and the rotating bracket are respectively connected to their corresponding synchronous wheels, and the second driving mechanism drives the rotating bracket to swing through the synchronous wheel and the synchronous belt.

[0018] Furthermore, a C-shaped clamp is provided at each end of the rotating bracket, and the C-shaped clamp is used to clamp the magnetic field probe.

[0019] Furthermore, two rotating brackets are provided, wherein each rotating bracket corresponds to a synchronous wheel, and two C-shaped clamps jointly clamp the magnetic field probe.

[0020] Furthermore, the second driving mechanism drives the rotating bracket to swing within an angle range of 0-180°.

[0021] Furthermore, the first driving mechanism is connected to a first angle encoder and / or the second driving mechanism is connected to a second angle encoder.

[0022] Furthermore, the first angle encoder or the second angle encoder is a non-metallic absolute rotary encoder.

[0023] Furthermore, the first driving mechanism or the second driving mechanism is a rotary pneumatic motor.

[0024] Furthermore, the first driving mechanism, the second driving mechanism and the magnetic field probe are respectively connected to the controller. Beneficial effects

[0025] This application fixes a central rotating shaft within the inner cylinder of the superconducting magnet to be tested, and uses a drive mechanism to drive the central rotating shaft to rotate 360°. This rotation of the central rotating shaft also drives the rotation of a rotating bracket. Simultaneously, another drive mechanism drives the rotating bracket to swing 180° left and right. By equipping each drive mechanism with an angle encoder, the rotation angles of the central rotating shaft and the rotating bracket can be precisely controlled, achieving accurate calibration of the uniformity and stability of the superconducting magnet's magnetic field. The specific beneficial effects are as follows.

[0026] 1. Automated measurement: The gas-driven rotary pneumatic motor enables automatic rotation and lifting of the measuring device without manual intervention, greatly improving the degree of automation of the measurement.

[0027] 2. High-precision angle recording: Using non-metallic absolute rotary encoder to record the rotation angle, it provides high-precision angle readings and ensures the accuracy of the measurement data.

[0028] 3. Full coverage measurement: The design enables the measuring device to cover the entire spherical surface of the superconducting magnet, achieving comprehensive magnetic field measurement and improving the comprehensiveness and uniformity of the measurement.

[0029] 4. Easy operation: The operation process and user interface are simplified, so that operators can easily perform magnetic field measurements even without professional background.

[0030] 5. Cost-effectiveness: Optimized design and use of cost-effective components reduce the manufacturing and maintenance costs of the device and improve economy.

[0031] 6. Reduce human errors: Automated operation reduces human intervention, reduces errors caused by improper operation, and improves the reliability of measurement results.

[0032] 7. Improve safety: Through remote control and automated operation, the risk of operators being exposed to strong magnetic fields is reduced, ensuring the safety of operators.

[0033] 8. Easy maintenance and calibration: The device is designed to be easy to maintain and calibrate, which reduces maintenance workload and cost and ensures long-term stable operation.

[0034] 9. Data consistency: Through automated and standardized measurement processes, the consistency of measurement results at different time points and between different operators is ensured.

[0035] 10. Environmentally friendly: The encoder is made of non-metallic materials to avoid interference with the magnetic field and ensure the stability of the measurement environment.

[0036] 11. Improve imaging quality: Accurate magnetic field measurement helps improve the quality and accuracy of MRI imaging, which is of great significance for medical diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the structure of the measuring device of the utility model after installation.

[0038] Figure 2 It is a front view of the measuring device of the present invention.

[0039] Figure 3 It is a rear view of the measuring device of the present invention.

[0040] Among them, 1-central rotating shaft, 2-fixed bracket, 3-first driving mechanism, 4-rotating bracket, 41-C-clamp, 5-second driving mechanism, 6-synchronizing wheel, 7-synchronizing belt, 8-first angle encoder, 9-second angle encoder, 10-magnetic field probe. DETAILED DESCRIPTION

[0041] In order to enhance the understanding of the present invention, the present invention will be described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0042] like Figure 1 The figure shows a device for measuring superconducting magnetic resonance magnetic fields. The device includes a central rotating shaft 1 installed within the inner cylinder of a superconducting magnet to be measured. The central rotating shaft 1 is coaxial with the inner cylinder of the superconducting magnet to be measured. Fixing brackets 2 are provided at each end of the central rotating shaft 1 to secure the central rotating shaft 1 to the inner cylinder of the superconducting magnet to be measured. Before measurement, the fixing brackets 2 are installed on both sides of the inner cylinder of the superconducting magnet, thereby securing the central rotating shaft to the central axis of the inner cylinder. After measurement, the fixing brackets 2 are removed.

[0043] A first driving mechanism 3 is provided at one end of the central rotating shaft 1 for driving the central rotating shaft 1 to rotate 360 ​​degrees. The first driving mechanism 3 can be a pneumatic motor.

[0044] At least one rotating bracket 4 is connected to the middle of the central rotating shaft 1 . The rotation of the central rotating shaft 1 can drive the rotating bracket 4 to rotate simultaneously. Therefore, the rotating bracket 4 can also rotate 360° along the central axis.

[0045] The rotating bracket 4 is connected to the second driving mechanism 5, and the second driving mechanism 5 and the rotating bracket 4 are respectively connected to the synchronous wheel 6. Figure 3As shown, two rotating brackets 4 can be provided, each connected to a respective synchronous pulley 6. A second drive mechanism 5 drives the connected synchronous pulleys 6 to rotate, and the three synchronous pulleys 6 rotate synchronously via a timing belt 7. This allows the rotating brackets 4 corresponding to the synchronous pulleys 6 to swing above the central rotation axis, with the swing angle ranging from 0 to 180°. Similarly, a pneumatic motor can also be used for the second drive mechanism 5.

[0046] Each end of the rotating bracket 4 is provided with a C-shaped clamp 41 for clamping the magnetic field probe 10. When there is only one rotating bracket 4, the clamping effect is not good. Therefore, it is possible to provide two rotating brackets 4, with two C-shaped clamps 41 clamping the two ends of the magnetic field probe 10 respectively, making it more secure.

[0047] According to a preferred embodiment of the present invention, the first driving mechanism 3 is connected to a first angle encoder 8 , and the first angle encoder 8 is a non-metallic absolute rotary encoder.

[0048] According to a preferred embodiment of the present invention, the second driving mechanism 5 is connected to a second angle encoder 9 , and the second angle encoder 9 is a non-metallic absolute rotary encoder.

[0049] According to a preferred embodiment of the present invention, first drive mechanism 3 is connected to first angle encoder 8, while second drive mechanism 5 is connected to second angle encoder 9. First angle encoder 8 and second angle encoder 9 are non-metallic absolute rotary encoders. The presence of first angle encoder 8 and second angle encoder 9 allows for more accurate measurement of the rotation angles of central rotating shaft 1 and rotating bracket 4.

[0050] According to a preferred embodiment of the present invention, the first driving mechanism 3, the second driving mechanism 5 and the magnetic field probe 10 are respectively connected to a controller, and the controller controls the angle and speed of their rotation.

[0051] During measurement, the first drive mechanism 3 and the second drive mechanism 5 work together to enable the device to automatically complete the measurement of the magnetic field strength of the entire three-dimensional coordinate point of the superconducting magnet. The specific working process is as follows:

[0052] Step 1: The second driving mechanism 5 drives the rotating bracket 4 to swing to a certain angle and then stop. The angle here is set to n1°;

[0053] Step 2: The first driving mechanism 3 drives the rotating bracket 4 to rotate n2°. At this time, the first driving mechanism 3 stops, and the magnetic field probe on the rotating bracket 4 starts to measure the magnetic field strength at this position;

[0054] Step 3: After the measurement is completed, the first driving mechanism 3 continues to drive the rotating bracket 4 to rotate n2° and then stops. The magnetic field probe on the rotating bracket 4 starts to measure the magnetic field strength at this position;

[0055] Step 4: Continue the previous process until the first driving mechanism 3 rotates 360°;

[0056] Step 5: After the second driving mechanism 5 drives the rotating bracket 4 to continue to swing n1°, steps 2 to 4 are repeated.

[0057] Step 6: Repeat the above steps until the rotating bracket 4 swings 180 degrees.

[0058] This automated measurement method not only improves measurement efficiency and reduces errors caused by manual operation, but also ensures the accuracy and reliability of the measurement results through precise angle control and height adjustment. In addition, the device can be connected to a controller designed with user convenience in mind. Through a simplified operation process and an intuitive user interface, even non-professionals can easily perform high-precision magnetic field measurements.

[0059] Overall, the device of the present application provides an efficient, accurate and user-friendly solution for measuring superconducting magnetic resonance magnetic fields. Its innovative design and automation functions are expected to be widely used in magnetic resonance imaging (MRI) and other related fields.

[0060] The embodiments disclosed in the present invention are preferred embodiments, but are not limited thereto. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A device for measuring a superconducting magnetic resonance magnetic field, comprising a central rotating shaft (1) installed in an inner cylinder of a superconducting magnet to be measured, wherein the central rotating shaft (1) is coaxially arranged with the inner cylinder of the superconducting magnet to be measured, and fixed brackets (2) are respectively arranged at both ends of the central rotating shaft (1), and the fixed brackets (2) are used to fix the central rotating shaft (1) in the inner cylinder of the superconducting magnet to be measured, characterized in that: A first driving mechanism (3) is provided at one end of the central rotating shaft (1), and the first driving mechanism (3) is used to drive the central rotating shaft (1) to rotate; The middle of the central rotating shaft (1) is connected to at least one rotating bracket (4), and the central rotating shaft (1) can drive the rotating bracket (4) to rotate. The rotating bracket (4) is connected to a second driving mechanism (5), and the second driving mechanism (5) can drive the rotating bracket (4) to swing.

2. The superconducting magnetic resonance magnetic field measuring device according to claim 1, characterized in that: The second driving mechanism (5) and the rotating bracket (4) are respectively connected to their corresponding synchronous wheels (6), and the second driving mechanism (5) drives the rotating bracket (4) to swing via the synchronous wheel (6) and the synchronous belt (7).

3. The superconducting magnetic resonance magnetic field measuring device according to claim 2, characterized in that: A C-shaped clamp (41) is provided at each end of the rotating bracket (4), and the C-shaped clamp (41) is used to clamp the magnetic field probe (10).

4. The superconducting magnetic resonance magnetic field measuring device according to claim 3, characterized in that: Two rotating brackets (4) are provided, wherein each rotating bracket (4) corresponds to a synchronous wheel (6), and two C-shaped clamps (41) jointly clamp the magnetic field probe (10).

5. The superconducting magnetic resonance magnetic field measuring device according to claim 3, characterized in that: The second driving mechanism (5) drives the rotating bracket (4) to swing at an angle ranging from 0 to 180°.

6. The superconducting magnetic resonance magnetic field measuring device according to claim 1, characterized in that: The first drive mechanism (3) is connected to a first angle encoder (8) and / or the second drive mechanism (5) is connected to a second angle encoder (9).

7. The superconducting magnetic resonance magnetic field measuring device according to claim 6, characterized in that: The first angle encoder (8) or the second angle encoder (9) is a non-metallic absolute rotary encoder.

8. The superconducting magnetic resonance magnetic field measuring device according to claim 1, characterized in that: The first driving mechanism (3) or the second driving mechanism (5) is a rotary pneumatic motor.

9. The superconducting magnetic resonance magnetic field measuring device according to claim 1, characterized in that: The first driving mechanism (3), the second driving mechanism (5) and the magnetic field probe (10) are respectively connected to the controller.

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