CN101706559A - Magnetic field measuring device of cyclotron - Google Patents
Magnetic field measuring device of cyclotron Download PDFInfo
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- CN101706559A CN101706559A CN200910250634A CN200910250634A CN101706559A CN 101706559 A CN101706559 A CN 101706559A CN 200910250634 A CN200910250634 A CN 200910250634A CN 200910250634 A CN200910250634 A CN 200910250634A CN 101706559 A CN101706559 A CN 101706559A
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- 238000009434 installation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 3
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- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000005025 nuclear technology Methods 0.000 description 1
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Abstract
The invention discloses a magnetic field measuring device of a cyclotron. The device comprises a rotary driving part, a rotary part and a rotary positioning part. Wherein the driving shaft is connected with the swing arm through a key; the rotating positioning part is positioned at the lower part of the rotating part, and the swing arm is rigidly connected with the positioning shaft. Because the rotary driving part is separated from the rotary positioning part, the positioning part is not influenced by the driving connection gap, thereby reducing the circumferential error of the rotary positioning system and improving the magnetic field measurement precision.
Description
Technical field
The invention belongs to and measure the magnetic variable technical field, be specifically related to a kind of device for measuring magnetic field of cyclotron.
Background technology
Magnetic field is the cyclotron most important component, and magnetic field provides constraining force and strong focusing force for the line motion, and the distribution of its field pattern has directly determined the performance of a cyclotron.In order to accurately measure Distribution of Magnetic Field, at present, in the magnetic-field measurement of low energy cyclotron, what generally adopt is to realize the circumferentially manual survey magnetic device of location with large gear, be step motor drive when the swing arm rotation of surveying the magnetic Hall plate is installed, the rotating part that drives angular encoder rotates.Because there is gash spacing error in gear location, and there is mismachining tolerance in the restriction that is subject to processing equipment during Gear Processing, thus the circumferential locating accuracy of gear be difficult to improve, thereby brought the error of magnetic-field measurement; And this error has randomness, can not adopt the method for numerical simulation to eliminate.For low energy compact high current cyclotron, the modulation degree in magnetic field is very big, and the error that adopts the gear location survey to bring is very big, is difficult to satisfy the requirement of magnetic-field measurement.Simultaneously, for compact high current cyclotron, the inner space is narrow and small, and magnetic field measuring device installs back check and correction, maintenance difficult.
In addition, in the 9th phase of the Nuclear Technology Volume Four magnetic-field measurement of electronics ring magnet " the HERA proton one electron pair collide " literary composition, the device that a kind of mode with screw drive translation coil is measured magnetic field intensity is disclosed.This device not only precision is not high, and it is bigger to take up room, and is not suitable for the accurate measurement in compact high current cyclotron magnetic field.
Summary of the invention
(1) goal of the invention
At the existing accurately problem of circumferential location that is difficult to of cyclotron magnetic field device for accurately measuring, the present invention aims to provide a kind of precise structure, locatees accurately, uses simply, measures magnetic field measuring device accurately.
(2) technical scheme
In order to address the above problem, the invention provides following technical scheme.
A kind of device for measuring magnetic field of cyclotron comprises rotary driving part branch, rotating part, positioning of rotating part.Wherein the rotary driving part branch comprises stepper motor and driving shaft, and the output of stepper motor drives the driving shaft rotation; Rotating part comprises swing arm, swing-around trajectory, the swing arm of surveying the magnetic Hall plate is installed rotates along swing-around trajectory; Positioning of rotating partly comprises locating shaft and accurate angular encoder, and locating shaft passes the center measured hole of accurate angular encoder, and drives the rotating part rotation of angular encoder.Key is, is connected by key between driving shaft and the swing arm; Positioning of rotating partly is positioned at the rotating part bottom, between swing arm and the locating shaft for being rigidly connected.
Connecting key between described driving shaft and the swing arm can be N limit shape, wherein N 〉=3.
(3) invention effect
In the technique scheme provided by the present invention, being connected by key between driving shaft and the swing arm, promptly is that on-fixed connects between the two, rotary driving part divide with the positioning of rotating part from, make positioning element do not driven the influence of joint gap, thereby reduced the circumferential error of positioning of rotating system.And the angle position of swing arm can accurately measure, thereby has improved the angle precision of magnetic-field measurement location greatly, has improved the key technical indexes---the magnetic-field measurement precision of this device.
Description of drawings
Fig. 1 device for measuring magnetic field of cyclotron structural representation;
Six sides that Fig. 2 embodiment 1 the is provided bond structure synoptic diagram that is rotationally connected.
Among the figure, 1. stepper motor 2. driving shafts 3. swing arms 4. swing-around trajectories 5. location axle sleeves 6. locating shafts 7. accurate angular encoders 8. are surveyed the magnetic Hall plates 9. 6 sides key that is rotationally connected.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further elaborated.
As shown in Figure 1, a kind of low energy compact high current cyclotron magnetic field device for accurately measuring, outward appearance is a rotating disk shape structure, comprises the rotary driving part branch on top, the rotating part at middle part and the positioning of rotating part of bottom.The rotary driving part branch on top comprises stepper motor 1, driving shaft 2; The rotating part at middle part comprises swing arm 3, swing-around trajectory 4; The positioning of rotating of bottom partly comprises location axle sleeve 5, locating shaft 6 and accurate angular encoder 7.
As shown in Figure 2, connect in the driving shaft 2 the cover six sides key 9 that is rotationally connected, leave the slit between the two, six sides are rotationally connected and are rigidly connected between key 9 and the swing arm 3.When driving shaft 2 rotates, after outer six sides turn over the idle motion of certain angle, drive the six sides key 9 that is rotationally connected and rotate, again by six sides key 9 drive swing arms 3 rotations that are rotationally connected.Wherein, connecting key 9 can also be a N limit shape except being the hexagon, N 〉=3 wherein, and the shape of driving shaft 2 adapts with it.Swing arm 3 width 150mm, length 900mm, two end supports is on swing-around trajectory 4, and swing-around trajectory 4 diameters are 900mm.Survey magnetic Hall plate 8 and be installed on the swing arm 3, and can radially move.For being rigidly connected, locating shaft 6 diameter 28mm are locating axle sleeve 5 inside by Bearing Installation between swing arm 3 and the locating shaft 6.Precision-fit between location axle sleeve 5 and the accelerator, closely cooperate for rolling bearing between locating shaft 6 and the location axle sleeve 5, guarantee right alignment and make the friction force between the two as far as possible little, rotate flexibly, locating shaft 6 passes the center measured hole of accurate angular encoder 7, and drives the rotating part rotation of angular encoder 7.
The principle of work of this survey magnetic device is: after stepper motor 1 driving swing arm 3 forwards certain angle to, angular encoder 7 transfers to control computer with the accurate angle position of swing arm 3, keep swing arm 3 motionless, Hall plate 8 is measured the magnetic field intensity of this point and is transferred to control computer, and position data and the magnetic-field measurement data with this point are mapped on computers.Repeatedly repeat this measuring process and can accurately measure Distribution of Magnetic Field data on the entire working surface.
Claims (4)
1. device for measuring magnetic field of cyclotron comprises rotary driving part branch, rotating part, positioning of rotating part; Wherein the rotary driving part branch comprises stepper motor (1) and driving shaft (2), and the output of stepper motor (1) drives driving shaft (2) rotation; Rotating part comprises swing arm (3), swing-around trajectory (4), the swing arm (3) of surveying magnetic Hall plate (8) is installed rotates along swing-around trajectory (4); Positioning of rotating partly comprises locating shaft (6) and accurate angular encoder (8), and locating shaft (6) passes the center measured hole of accurate angular encoder (7), and drives the rotating part rotation of angular encoder (7); It is characterized in that: be connected by key between driving shaft (2) and the swing arm (3); Positioning of rotating partly is positioned at the rotating part bottom, between swing arm (3) and the locating shaft (6) for being rigidly connected.
2. device for measuring magnetic field of cyclotron according to claim 1, it is characterized in that: the structure that is connected by key between described driving shaft (2) and the swing arm (3) is, the cover N side key (9) that is rotationally connected in the driving shaft (2), the slit is left in N 〉=3 between the two; N side is rotationally connected and is rigidly connected between key (9) and the swing arm (3).
3. device for measuring magnetic field of cyclotron according to claim 1 is characterized in that: the described N side key (9) that is rotationally connected is the six sides keys that are rotationally connected.
4. device for measuring magnetic field of cyclotron according to claim 1 is characterized in that: in axle sleeve (5) inside, location, location axle sleeve (5) cooperates with accelerator described locating shaft (6) by Bearing Installation.
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CN200910250634A CN101706559A (en) | 2009-12-11 | 2009-12-11 | Magnetic field measuring device of cyclotron |
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CN200910250634A CN101706559A (en) | 2009-12-11 | 2009-12-11 | Magnetic field measuring device of cyclotron |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103064039A (en) * | 2013-01-04 | 2013-04-24 | 中国原子能科学研究院 | High-precision method of magnetic field measurement for compact intermediate energy cyclothron |
CN103675720A (en) * | 2013-12-18 | 2014-03-26 | 中国原子能科学研究院 | Circular accelerator magnetic field measuring device |
CN104330752A (en) * | 2014-10-30 | 2015-02-04 | 成都工业学院 | Self-positioning debugging device and method for magnetic field testing sensor |
CN106125018A (en) * | 2016-07-29 | 2016-11-16 | 中国原子能科学研究院 | The magnetic field measuring device of a kind of superconducting coil first harmonic and measuring method thereof |
CN106291415A (en) * | 2016-07-29 | 2017-01-04 | 中国原子能科学研究院 | A kind of magnetic field measuring device positioning superconducting coil position and method thereof |
WO2019010945A1 (en) * | 2017-07-12 | 2019-01-17 | 合肥中科离子医学技术装备有限公司 | Cyclotron magnetic field measurement system based on detection coil and measurement method therefor |
CN110703164A (en) * | 2019-10-18 | 2020-01-17 | 中国原子能科学研究院 | Magnetic shielding magnetic field measuring device of cyclotron |
CN110736944A (en) * | 2018-07-21 | 2020-01-31 | 中国原子能科学研究院 | Full-automatic magnetic field measuring device suitable for small cyclotron with gap of 20mm-30mm |
CN116256676A (en) * | 2023-01-09 | 2023-06-13 | 中国科学院近代物理研究所 | Device and method for measuring isochronal magnetic field of cyclotron magnet |
-
2009
- 2009-12-11 CN CN200910250634A patent/CN101706559A/en active Pending
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103064039A (en) * | 2013-01-04 | 2013-04-24 | 中国原子能科学研究院 | High-precision method of magnetic field measurement for compact intermediate energy cyclothron |
CN103675720A (en) * | 2013-12-18 | 2014-03-26 | 中国原子能科学研究院 | Circular accelerator magnetic field measuring device |
CN103675720B (en) * | 2013-12-18 | 2017-03-29 | 中国原子能科学研究院 | A kind of device for measuring magnetic field of cyclotron |
CN104330752B (en) * | 2014-10-30 | 2017-02-15 | 成都工业学院 | Self-positioning debugging device and method for magnetic field testing sensor |
CN104330752A (en) * | 2014-10-30 | 2015-02-04 | 成都工业学院 | Self-positioning debugging device and method for magnetic field testing sensor |
CN106125018A (en) * | 2016-07-29 | 2016-11-16 | 中国原子能科学研究院 | The magnetic field measuring device of a kind of superconducting coil first harmonic and measuring method thereof |
CN106291415A (en) * | 2016-07-29 | 2017-01-04 | 中国原子能科学研究院 | A kind of magnetic field measuring device positioning superconducting coil position and method thereof |
WO2019010945A1 (en) * | 2017-07-12 | 2019-01-17 | 合肥中科离子医学技术装备有限公司 | Cyclotron magnetic field measurement system based on detection coil and measurement method therefor |
CN110736944A (en) * | 2018-07-21 | 2020-01-31 | 中国原子能科学研究院 | Full-automatic magnetic field measuring device suitable for small cyclotron with gap of 20mm-30mm |
CN110703164A (en) * | 2019-10-18 | 2020-01-17 | 中国原子能科学研究院 | Magnetic shielding magnetic field measuring device of cyclotron |
CN110703164B (en) * | 2019-10-18 | 2024-05-14 | 中国原子能科学研究院 | Magnetic shielding magnetic field measuring device of cyclotron |
CN116256676A (en) * | 2023-01-09 | 2023-06-13 | 中国科学院近代物理研究所 | Device and method for measuring isochronal magnetic field of cyclotron magnet |
CN116256676B (en) * | 2023-01-09 | 2023-10-31 | 中国科学院近代物理研究所 | Device and method for measuring isochronal magnetic field of cyclotron magnet |
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Open date: 20100512 |