CN117791081A - Antenna balance adjusting system - Google Patents
Antenna balance adjusting system Download PDFInfo
- Publication number
- CN117791081A CN117791081A CN202311834238.XA CN202311834238A CN117791081A CN 117791081 A CN117791081 A CN 117791081A CN 202311834238 A CN202311834238 A CN 202311834238A CN 117791081 A CN117791081 A CN 117791081A
- Authority
- CN
- China
- Prior art keywords
- transmission rod
- direction transmission
- outer cylinder
- supporting table
- balance adjustment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 112
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000001681 protective effect Effects 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 10
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 239000006091 Macor Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000002241 glass-ceramic Substances 0.000 claims description 3
- 230000001629 suppression Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 239000002887 superconductor Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 6
- 239000000523 sample Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 239000010955 niobium Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 241000238366 Cephalopoda Species 0.000 description 1
- 230000005668 Josephson effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
The invention relates to an antenna balance adjusting system, which comprises a balance adjusting unit, wherein the balance adjusting unit comprises a Z-direction transmission rod, a Y-direction transmission rod, an X-direction transmission rod, a Z-direction detection coil group and a sensor body, the bottom of the Z-direction transmission rod is connected with the Z-direction detection coil group which is arranged on one side of the sensor body close to the top, a Y-direction compensation sheet is arranged at the bottom of the Y-direction transmission rod, and an X-direction compensation sheet is arranged at the bottom of the X-direction transmission rod; the upper part of the balance adjusting unit is provided with a driving unit and a transmission unit from top to bottom in sequence. According to the invention, through the structure of the cooperation of the driving unit, the transmission unit and the balance adjusting unit, the three XYZ axial directions can be sequentially shifted, so that the magnetic field is compensated, the structure is compact, and the operation is more convenient; the detection coil set has good far-field noise suppression performance, and is suitable for detecting extremely weak magnetic fields due to the uniform volume and the large use space.
Description
Technical Field
The invention relates to the technical field of biological magnetic measurement correlation, in particular to an antenna balance adjusting system.
Background
As sensors in bio-magnetic systems, high sensitivity magnetometers such as superconducting quantum interferometers (SQUIDs), optical pump magnetometers or magneto-resistive sensors are used. These magnetometers are characterized by high magnetic field resolution in the pico-femto Tesla (pico-femto Tesla) range. Meanwhile, the useful magnetic signal spectrum of a living body (e.g., a human heart) is concentrated in the low frequency range of 0.1-100Hz. The presence of industrial noise (radio stations, mobile communications, electrostatic discharge and other sources of electromagnetic fields and waves) can disturb the operational stability of these measuring devices. The interference level at which magnetometers still function normally is typically not more than 0.1nT.
High levels of urban industrial noise require the use of additional passive and active protection against magnetic interference in the measurement area. Meanwhile, the maximum induction value of a biological magnetic field such as the Magnetic Field (MF) of the human heart does not exceed 50pT, and thus in order to reliably record and recognize such weak signals, special hardware and software tools should be used to reduce the external disturbing magnetic field of the measurement region by several orders of magnitude. Thus, the patient is placed in the natural magnetic field setting (i.e., in the MF of the Earth), where the MF of the Earth is approximately equal to 50 μT.
The existing antenna balance adjusting method comprises the following steps:
1. magnetic Shielding Room (MSR). To date, passive electromagnetic screens in the form of shielded cells, which are several times more expensive than the measuring device itself, are widely used in order to ensure the efficiency of the bio-magnetic system. However, MSR-is an expensive and technically complex product and is therefore generally used only in large research centers.
2. Active noise compensation using inductive coils. The method is based on the idea of using Negative Feedback (NFB): the ambient magnetic field measured by the reference sensor is used to generate an MF having an amplitude equal to the obstacle but opposite in direction, which MF is further used to subtract (compensate) the noise component of the measurement signal.
After massive search, it was found that prior art publication CN104220890B, in order to passively compensate for the disturbance, it was proposed to design a device at the magnetometer input, said device comprising compensation elements and means for moving these compensation elements, said means comprising a displacement unit, a holding unit, and a fixation unit. In a specific embodiment, three short closed coil circuits (wire conductors) are used, which are orthogonally placed in space and independently move up and down with respect to the magnetometer or its input antenna. The circuit (conductors) is fixed at the minimum of the external disturbance amplitude according to a given electric field projection (field projection) implementation. Variants have also been proposed, including cooling the meter and/or the electrical circuit, placing the electrical circuit in a cryostat and preparing the cryostat from superconductors.
In summary, the problems in the prior art are:
1. in the existing displacement compensation equipment, in the displacement compensation process, the displacement compensation treatment is required to be carried out on the existing displacement compensation equipment independently;
2. the performance of the detection coil in the existing displacement compensation equipment for suppressing far-field noise interference is poor;
3. existing displacement compensation devices are not adaptable in extremely weak magnetic fields.
In view of the above-mentioned drawbacks, the present inventors have actively studied and innovated to create an antenna balance adjustment system, which has a more industrial value.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide an antenna balance adjustment system.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the antenna balance adjusting system comprises a balance adjusting unit, wherein the balance adjusting unit comprises a Z-direction transmission rod, a Y-direction transmission rod, an X-direction transmission rod, a Z-direction detection coil set and a sensor body, the bottom of the Z-direction transmission rod is connected with the Z-direction detection coil set which is arranged on one side of the sensor body close to the top, a Y-direction compensation sheet is arranged at the bottom of the Y-direction transmission rod, and an X-direction compensation sheet is arranged at the bottom of the X-direction transmission rod;
a driving unit and a transmission unit are sequentially arranged above the balance adjusting unit from top to bottom;
the driving unit comprises a knob, a supporting outer cylinder body and a protective shell, a rotating shaft is arranged at the bottom of the knob, a Z-direction clamping block, a Y-direction clamping block and an X-direction clamping block are sequentially arranged on the rotating shaft close to one side of the knob from top to bottom, a knob mounting pipe is arranged on the protective shell below the knob, an elastic clamping plate used for limiting the Z-direction clamping block, the Y-direction clamping block and the X-direction clamping block is arranged in the knob mounting pipe, and the protective shell is arranged at the bottom of the supporting outer cylinder body;
the transmission unit comprises a transmission outer cylinder body, the top of the transmission outer cylinder body is connected with a protective shell above through an upper boss, the bottom of a rotating shaft can extend into a transmission outer cylinder body below, a rotary driving gear is installed at the bottom of the rotating shaft, a Z-direction supporting table, a Y-direction supporting table and an X-direction supporting table are sequentially arranged on the transmission outer cylinder body at the bottom of the upper boss from bottom to top, the Z-direction supporting table, the Y-direction supporting table and the X-direction supporting table are all installed on the transmission outer cylinder body through support connecting rods, the Z-direction gear is installed below the Z-direction supporting table through a Z-direction transmission shaft, the Y-direction gear is installed below the Y-direction supporting table through a Y-direction transmission shaft, the X-direction gear is installed below the X-direction supporting table through an X-direction transmission shaft, and the rotary driving gear is located at the circle center of a circle formed by the Z-direction gear, the Y-direction gear and the X-direction gear;
the Z-direction transmission shaft is connected with the top of the Z-direction transmission rod below, the Y-direction transmission shaft is connected with the top of the Y-direction transmission rod below, and the X-direction transmission shaft is connected with the top of the X-direction transmission rod below.
As a further improvement of the invention, a screw mounting is mounted on the protective housing below the support outer cylinder.
As a further improvement of the invention, the superconducting antenna in the supporting outer cylinder can extend into the sensor body below.
As a further improvement of the invention, the bottom of the transmission outer cylinder body is provided with a Z-direction transmission rod mounting groove for mounting a Z-direction transmission rod, a Y-direction transmission rod mounting groove for mounting a Y-direction transmission rod and an X-direction transmission rod mounting groove for mounting an X-direction transmission rod in sequence along the circumferential direction.
As a further improvement of the invention, a guide ring is also arranged above the sensor body, and three guide clamping grooves are uniformly arranged on the guide ring along the circumferential direction and can be respectively used for installing a Z-direction transmission rod, a Y-direction transmission rod and an X-direction transmission rod.
As a further improvement of the invention, the Z-direction detection coil assembly is arranged on the sensor body at a position close to the top through a substrate, and the substrate is a paper cylinder substrate.
As a further improvement of the invention, the Z-direction detection coil set is an N-order axial gradiometer; the two detection coils with identical shapes and turns are reversely wound and connected in series, a first-order axial gradiometer is obtained by coupling the input coil with a superconducting interferometer, two first-order axial gradiometers with opposite polarities are connected together, a second-order axial gradiometer can be obtained, and the like.
As a further improvement of the present invention, the Z-direction detecting coil group is composed of niobium wire.
As a further improvement of the invention, the sensor body is a Macor glass ceramic rod.
As a further improvement of the invention, the Y-direction compensation sheet and the X-direction compensation sheet are lead sheets.
By means of the scheme, the invention has at least the following advantages:
according to the invention, through the structure of the cooperation of the driving unit, the transmission unit and the balance adjusting unit, the three XYZ axial directions can be sequentially shifted, so that the magnetic field is compensated, the structure is compact, and the operation is more convenient;
the detection coil set has good far-field noise suppression performance, and is suitable for detecting extremely weak magnetic fields due to the uniform volume and the large use space.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an antenna balance adjustment system according to the present invention;
fig. 2 is a schematic structural view of the driving unit of fig. 1;
FIG. 3 is a schematic view of the structure of FIG. 2 at the knob and rotation shaft;
FIG. 4 is a schematic view of the structure of the inside of the tubulation of FIG. 2 by screw Niu An;
FIG. 5 is a schematic view of the transmission unit of FIG. 1;
FIG. 6 is a schematic diagram of the balance adjustment unit of FIG. 1;
FIG. 7 is a schematic view of the structure of the outer cylinder of the transmission of the present invention;
FIG. 8 is a schematic diagram of the structure of a first order axial gradiometer of the present invention;
FIG. 9 is a schematic diagram of a second order axial gradiometer according to the invention;
FIG. 10 is a schematic diagram of the distribution of Y-direction and X-direction compensators in the present invention;
FIG. 11 is a schematic diagram of the magnetic field, the compensation plate and the coil of the present invention;
FIG. 12 is a schematic diagram II of the magnetic field, the compensation plate and the coil of the present invention;
FIG. 13 is a schematic diagram III of the magnetic field, the compensation plate and the coil of the present invention;
FIG. 14 is a signal input interface in step 4 of a balance adjustment embodiment of the present invention;
FIG. 15 is a signal input interface in step 6 of a balance adjustment embodiment of the present invention;
FIG. 16 is a signal input interface in step 7 of a balance adjustment embodiment of the present invention;
FIG. 17 is a signal input interface in step 8 of a balance adjustment embodiment of the present invention;
FIG. 18 is a detection interface in step 9 of a balance adjustment embodiment of the present invention.
In the drawings, the meaning of each reference numeral is as follows.
The driving unit 1, the transmission unit 2, the balance adjusting unit 3, the knob 4, the knob mounting tube 5, the support outer cylinder 6, the protective housing 7, the screw mount 8, the Z-direction clamp block 9, the Y-direction clamp block 10, the X-direction clamp block 11, the rotation shaft 12, the elastic clamp plate 13, the transmission outer cylinder 14, the upper boss 15, the Z-direction support table 16, the Y-direction support table 17, the X-direction support table 18, the support connecting rod 19, the rotation driving gear 20, the Z-direction gear 21, the Y-direction gear 22, the X-direction gear 23, the Z-direction transmission rod mounting groove 24, the Y-direction transmission rod mounting groove 25, the X-direction transmission rod mounting groove 26, the Z-direction transmission rod 27, the Y-direction transmission rod 28, the X-direction transmission rod 29, the guide ring 30, the guide clamp groove 31, the substrate 32, the Z-direction detection coil group 33, and the sensor body 34.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Examples
As shown in figures 1 to 18 of the drawings,
an antenna balance adjusting system comprises a driving unit 1, a transmission unit 2 and a balance adjusting unit 3, wherein the driving unit 1 and the transmission unit 2 are sequentially arranged above the balance adjusting unit 3 from top to bottom.
1. The driving unit 1 comprises a knob 4, a supporting outer cylinder 6 and a protective casing 7, a rotating shaft 12 is arranged at the bottom of the knob 4, a Z-direction clamping block 9, a Y-direction clamping block 10 and an X-direction clamping block 11 are sequentially arranged on the rotating shaft 12 close to one side of the knob 4 from top to bottom, a knob mounting tube 5 is arranged on the protective casing 7 below the knob 4, an elastic clamping plate 13 which is used for limiting the Z-direction clamping block 9, the Y-direction clamping block 10 and the X-direction clamping block 11 is arranged in the knob mounting tube 5, and the protective casing 7 is arranged at the bottom of the supporting outer cylinder 6.
A screw mounting 8 is mounted on the protective housing 7 below the support outer cylinder 6, and the superconducting antenna in the support outer cylinder 6 can extend into the sensor body 34 below.
2. The transmission unit 2 comprises a transmission outer cylinder 14, the top of the transmission outer cylinder 14 is connected with the upper protective shell 7 through an upper boss 15, the bottom of a rotating shaft 12 can extend into the lower transmission outer cylinder 14, a rotary driving gear 20 is installed at the bottom of the rotating shaft 12, a Z-direction supporting table 16, a Y-direction supporting table 17 and an X-direction supporting table 18 are sequentially arranged on the transmission outer cylinder 14 from bottom to top on the transmission outer cylinder 14 at the bottom of the upper boss 15, the Z-direction supporting table 16, the Y-direction supporting table 17 and the X-direction supporting table 18 are all installed on the transmission outer cylinder 14 through supporting connecting rods 19, the Z-direction gear 21 is installed below the Z-direction supporting table 16 through a Z-direction transmission shaft, the Y-direction gear 22 is installed below the Y-direction supporting table 17 through a Y-direction transmission shaft, the X-direction gear 23 is installed below the X-direction supporting table 18 through an X-direction transmission shaft, and the rotary driving gear 20 is positioned at the circle centers of circles formed by the Z-direction gear 21, the Y-direction gear 22 and the X-direction gear 23.
The Z-direction transmission shaft is connected with the top of the Z-direction transmission rod 27 below, the Y-direction transmission shaft is connected with the top of the Y-direction transmission rod 28 below, and the X-direction transmission shaft is connected with the top of the X-direction transmission rod 29 below.
The bottom of the transmission outer cylinder 14 is provided with a Z-direction transmission rod mounting groove 24 for mounting a Z-direction transmission rod 27, a Y-direction transmission rod mounting groove 25 for mounting a Y-direction transmission rod 28, and an X-direction transmission rod mounting groove 26 for mounting an X-direction transmission rod 29 in this order along the circumferential direction.
3. The balance adjusting unit 3, the balance adjusting unit 3 includes Z to transfer line 27, Y to transfer line 28, X to transfer line 29, Z to detection coil group 33 and sensor body 34, and the bottom of Z to transfer line 27 is connected with the Z to detection coil group 33 of installing on the sensor body 34 near top one side, and Y to the compensating piece is installed to the bottom of Y to transfer line 28, and X to the compensating piece is installed to the bottom of X to transfer line 29. The Y-direction and X-direction compensatory sheets were 4X 2mm lead sheets with a superconductor tc=7.2k in liquid helium.
As in fig. 10:
XY direction balance is achieved by adjusting the positions of the two lead sheets, and Z direction balance is achieved by adjusting the position of the Z direction detection coil set 33.
As in fig. 3:
the knob 4 is positioned at the lowest end (namely the Z-direction clamping block 9 is positioned at the elastic clamping plate 13) and can be rotated to adjust the position of the Z-direction adjusting mechanism;
the knob 4 is pulled upwards by one step (namely, the Y-direction clamping block 10 is positioned at the elastic clamping plate 13) and can be rotated to adjust the position of the Y-direction adjusting mechanism;
the knob 4 is pulled up one step more (namely, the X-direction clamping block 11 is positioned at the elastic clamping plate 13) to rotate so as to adjust the position of the X-direction adjusting mechanism.
The josephson effect refers to the phenomenon that electron pairs can generate tunneling currents through an insulating layer between two superconductors when the insulating layer is thin to atomic dimensions, i.e. superconducting currents can be generated in a superconductor-insulator-superconductor (superconductor) structure.
Superconductors have three basic characteristics: complete electrical conductivity, complete diamagnetism, and flux quantization.
The complete conductivity is also called zero resistance effect, which means the phenomenon that the resistance suddenly disappears when the temperature is lowered below a certain temperature.
The complete antimagnetic effect is also called Miesner effect, and the term "antimagnetic" refers to the phenomenon that magnetic lines of force cannot pass through a superconductor under the condition that the magnetic field intensity is lower than a critical value, and the magnetic field inside the superconductor is zero.
As shown in fig. 11 to 13:
lead (superconducting temperature 7.2K) is superconducting in liquid helium, and the magnetic field bypasses after hitting the lead.
The position of the lead sheet relative to the coil is adjusted through the knob, so that the X or Y direction magnetic field passes through the coil downwards or upwards, and the balance of the X or Y direction is realized.
The Z-direction detecting coil group 33 is two or more independent niobium rings, which antenna coil the niobium rings are close to, the magnetic induction of the antenna coil is weakened, and thus the Z-direction balance adjustment can be realized by adjusting the position of the adjusting coil.
The upper part of the sensor body 34 is also provided with a guide ring 30, three guide clamping grooves 31 are uniformly arranged on the guide ring 30 along the circumferential direction, and the three guide clamping grooves 31 can be used for installing the Z-direction transmission rod 27, the Y-direction transmission rod 28 and the X-direction transmission rod 29 respectively.
The detection coil set 33 is an N-order axial gradiometer as shown in fig. 8 and 9,Z; wherein, two detection coils with identical shape and turns are reversely wound and connected in series, and the first-order axial gradiometer is obtained by coupling the input coil with the superconducting interferometer.
Connecting two first-order axial gradiometers with opposite polarities together can obtain a second-order axial gradiometer, and so on.
The Z-direction detection coil group 33 having the above-described structure can detect a very weak magnetic field of up to several hundred GS; the coil has the advantages of uniformity, large volume, wide use space, simple and convenient operation, realization of a one-dimensional, two-dimensional and two-dimensional combined magnetic field, provision of an alternating current and direct current magnetic field, and good linear relation between current and magnetic field.
The magnetic material detection device is suitable for material magnetism or detection experiments of various institutions and enterprises, is applied to various subjects such as materials, electronics, biology, medical treatment, aerospace, chemistry, application physics and the like, and is mainly used for: the method comprises the steps of generating a standard magnetic field, counteracting and compensating the earth magnetic field, simulating geomagnetic environment, judging magnetic shielding effect, simulating electromagnetic interference, calibrating a Hall probe and various forcemeters, researching biological magnetic field and researching substance waiting property.
The Z-direction detecting coil group 33 is mounted on the sensor body 34 at a position near the top through the substrate 32, and the substrate 32 is a paper tube substrate. The Z-direction detecting coil set 33 is composed of niobium wire, and the sensor body 34 is a Macor glass ceramic rod.
Testing coil inductance: l is equal to about 0.5 x 10 "6H;
material quality: niobium (Niobium), 50um;
niobium superconducting critical temperature tc=9.2k= -263.95 ℃;
liquid helium temperature: 4.2 k= -268.9 ℃.
Balance adjustment embodiment of the invention:
step 1, determining directions of three axes XYZ:
the direction parallel to the horizontal line of the central positions of the knob 4 and the signal line is the X direction; the direction which is horizontal and vertical to the X direction is the Y direction; the direction parallel to the central axis of the adjustment knob is the Z direction.
Step 2, the signal connecting wire connects the detection coil group 33 with the model output interface of the signal generator, and dials the signal connecting wire to a neutral position (middle position).
And 3, powering up the MCG9 controller.
Step 4, software operation setting:
1) Opening a main menu of the CarMag software;
2) Entering a software interface, clicking a < tool/Tools >, clicking a < new database/Create New Database >, and setting a file;
3) Clicking < New Study/New Study > or shortcut F4;
4) Clicking < New/New >, inputting a patient name "Test1", clicking < OK > to save patient information;
5) < slave Recorder/From Recorder >, open interface;
6) Clicking on < Start >, opening the signal input interface, as shown in fig. 14, which is a schematic diagram when not debugged;
the following parameters were selected in the oscilloscope:
scan range = 5;
MCG range = 3V;
the visual low frequency filter is selected.
Step 5, setting a signal generator:
the signal generator is powered on, a sine wave is selected, and the frequency is set: 8Hz; amplitude of: 50mV; compensation voltage: 4V, click the "Output" button.
Step 6, adjust the Z direction, as in fig. 15:
1) Pulling the signal connection line switch to "Z";
2) The channel with the largest signal of the 9 channels, such as the 5 th channel;
3) Adjusting an adjusting knob above a channel probe with the maximum signal amplitude to a Z position;
4) Slowly rotating in one direction, simultaneously observing whether the amplitude of the signal of the corresponding channel is smaller, if so, rotating in the opposite direction, slowly rotating to enable the signal to be smaller, then gradually increasing the amplitude of the output signal of the signal generator until 3V, and rotating the adjusting knob until the signal of the channel is adjustable to be minimum;
5) The 9 channels should not have signals exceeding the display area of each channel.
Step 7, adjusting the X direction as shown in FIG. 16;
1) Dialing the signal connection line switch to "Y";
2) Judging the channel with the largest signal in 9 channels, such as the 5 th channel;
3) Adjusting an adjusting knob above a channel probe with the maximum signal amplitude to an X position;
4) Slowly rotating in one direction, simultaneously observing whether the amplitude of the signal of the corresponding channel is smaller, if so, rotating in the opposite direction, slowly rotating to enable the signal to be smaller, then gradually increasing the amplitude of the output signal of the signal generator until 3V, and rotating the adjusting knob until the signal of the channel is adjustable to be minimum;
5) The 9 channels should not have signals exceeding the display area of each channel.
Step 8, adjusting the Y direction as shown in FIG. 17;
1) Pulling the signal connection line switch to "X";
2) Judging the channel with the largest signal in 9 channels, such as the 5 th channel;
3) Adjusting an adjusting knob above a channel probe with the maximum signal amplitude to a Y position;
4) Slowly rotating in one direction, simultaneously observing whether the amplitude of the signal of the corresponding channel is smaller, if so, rotating in the opposite direction, slowly rotating to enable the signal to be smaller, then gradually increasing the amplitude of the output signal of the signal generator until 3V, and rotating the adjusting knob until the signal of the channel is adjustable to be minimum;
5) The 9 channels should not have signals exceeding the display area of each channel.
Step 9, detection:
as shown in fig. 18, the magnetic field of the heart is stable, and the magnitude of the magnetic field is determined by the distance from the heart.
Step 10, finishing:
1) Closing signal output of the signal generator, and closing the power supply;
2) Dialing the signal connecting wire switch to neutral gear, and disconnecting the connecting wire between the signal generator and the detection coil group;
3) Closing the controller;
4) Disconnecting the multiplexer from the probe;
5) Disconnecting an extension line connected with the multiplexer and the controller;
6) The antenna balance adjustment system of the present invention is carefully removed from the calibration apparatus.
According to the invention, through the structure of the cooperation of the driving unit, the transmission unit and the balance adjusting unit, the three XYZ axial directions can be sequentially shifted, so that the magnetic field is compensated, the structure is compact, and the operation is more convenient;
the detection coil set has better performance of suppressing far-field noise interference;
the detection coil set of the invention has the advantages of uniformity, large volume and wide use space, and can be suitable for extremely weak magnetic fields.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected: can be mechanically or electrically connected: can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. The antenna balance adjustment system comprises a balance adjustment unit (3), wherein the balance adjustment unit (3) comprises a Z-direction transmission rod (27), a Y-direction transmission rod (28), an X-direction transmission rod (29), a Z-direction detection coil group (33) and a sensor body (34), the bottom of the Z-direction transmission rod (27) is connected with the Z-direction detection coil group (33) which is arranged on one side of the sensor body (34) close to the top, a Y-direction compensation sheet is arranged at the bottom of the Y-direction transmission rod (28), and an X-direction compensation sheet is arranged at the bottom of the X-direction transmission rod (29);
the method is characterized in that:
a driving unit (1) and a transmission unit (2) are sequentially arranged above the balance adjusting unit (3) from top to bottom;
the driving unit (1) comprises a knob (4), a supporting outer cylinder body (6) and a protective casing (7), a rotating shaft (12) is arranged at the bottom of the knob (4), a Z-direction clamping block (9), a Y-direction clamping block (10) and an X-direction clamping block (11) are sequentially arranged on the rotating shaft (12) close to one side of the knob (4) from top to bottom, a knob mounting pipe (5) is arranged on the protective casing (7) below the knob (4), an elastic clamping plate (13) used for limiting the Z-direction clamping block (9), the Y-direction clamping block (10) and the X-direction clamping block (11) is arranged in the knob mounting pipe (5), and the protective casing (7) is arranged at the bottom of the supporting outer cylinder body (6);
the transmission unit (2) comprises a transmission outer cylinder body (14), the top of the transmission outer cylinder body (14) is connected with a protection shell (7) above through an upper boss (15), the bottom of the rotating shaft (12) can extend into the transmission outer cylinder body (14) below, a rotary driving gear (20) is arranged at the bottom of the rotating shaft (12), a Z-direction supporting table (16), a Y-direction supporting table (17) and an X-direction supporting table (18) are sequentially arranged on the transmission outer cylinder body (14) at the bottom of the upper boss (15) from bottom to top, the Z-direction supporting table (16), the Y-direction supporting table (17) and the X-direction supporting table (18) are all arranged on the transmission outer cylinder body (14) through supporting connecting rods (19), a Z-direction gear (21) is arranged below the Z-direction supporting table (16) through a Y-direction transmission shaft, a Y-direction gear (22) is arranged below the Y-direction supporting table (17) through a Y-direction transmission shaft, and an X-direction gear (23) is arranged below the X-direction supporting table (18) and is arranged on the Y-direction gear (21) through the X-direction transmission shaft, and the X-direction gear (23) is positioned at the center of a circle of the X-direction supporting table (20);
the Z-direction transmission shaft is connected with the top of a Z-direction transmission rod (27) below, the Y-direction transmission shaft is connected with the top of a Y-direction transmission rod (28) below, and the X-direction transmission shaft is connected with the top of an X-direction transmission rod (29) below.
2. An antenna balance adjustment system according to claim 1, characterized in that a screw mount (8) is mounted on the protective housing (7) below the support outer cylinder (6).
3. An antenna balance adjustment system according to claim 1, characterized in that the superconducting antenna in the supporting outer cylinder (6) is extendable into the sensor body (34) below.
4. An antenna balance adjusting system according to claim 1, wherein the bottom of the transmission outer cylinder (14) is provided with a Z-direction transmission rod mounting groove (24) for mounting a Z-direction transmission rod (27), a Y-direction transmission rod mounting groove (25) for mounting a Y-direction transmission rod (28), and an X-direction transmission rod mounting groove (26) for mounting an X-direction transmission rod (29) in this order along the circumferential direction.
5. An antenna balance adjustment system according to claim 1, characterized in that a guide ring (30) is further arranged above the sensor body (34), three guide clamping grooves (31) are uniformly arranged on the guide ring (30) along the circumferential direction, and the three guide clamping grooves (31) can be used for installing a Z-direction transmission rod (27), a Y-direction transmission rod (28) and an X-direction transmission rod (29) respectively.
6. An antenna balance adjustment system according to claim 1, characterized in that the Z-direction detection coil assembly (33) is mounted on the sensor body (34) near the top by means of a substrate (32), and that the substrate (32) is a paper tube substrate.
7. An antenna balance adjustment system according to claim 1, characterized in that the Z-direction detection coil set (33) is an N-order axial gradiometer; the two detection coils with identical shapes and turns are reversely wound and connected in series, a first-order axial gradiometer is obtained by coupling the input coil with a superconducting interferometer, two first-order axial gradiometers with opposite polarities are connected together, a second-order axial gradiometer can be obtained, and the like.
8. An antenna balance adjustment system according to claim 1, characterized in that the Z-direction detection coil set (33) consists of niobium wire.
9. An antenna balance adjustment system according to claim 1, characterized in that the sensor body (34) is a Macor glass ceramic rod.
10. An antenna balance adjustment system according to claim 1, wherein the Y-direction compensation plate and the X-direction compensation plate are lead plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311834238.XA CN117791081A (en) | 2023-12-28 | 2023-12-28 | Antenna balance adjusting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311834238.XA CN117791081A (en) | 2023-12-28 | 2023-12-28 | Antenna balance adjusting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117791081A true CN117791081A (en) | 2024-03-29 |
Family
ID=90383239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311834238.XA Pending CN117791081A (en) | 2023-12-28 | 2023-12-28 | Antenna balance adjusting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117791081A (en) |
-
2023
- 2023-12-28 CN CN202311834238.XA patent/CN117791081A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110958830B (en) | Combined type environmental interference magnetic field shielding system | |
| Strait | Magnetic diagnostic system of the DIII-D tokamak | |
| Jensen et al. | Reduction of pulsed gradient settling time in the superconducting magnet of a magnetic resonance instrument | |
| CN109872857B (en) | Low-temperature back field magnet and high-temperature superconducting unit alternating current loss measuring device | |
| Wei et al. | Design of a sensor coil and measurement electronics for magnetic induction tomography | |
| CN101422365B (en) | Equalizing pulse external magnetic field adjustment device and method in high-temperature SQUID application | |
| JP2010525892A (en) | Low magnetic field SQUID-MRI apparatus, component and method | |
| US20040145366A1 (en) | Superconducting quantum interference apparatus and method for high resolution imaging of samples | |
| Arpaia et al. | Performance of a fast digital integrator in on-field magnetic measurements for particle accelerators | |
| US7541811B2 (en) | Apparatus for electron spin resonance CT | |
| Baudenbacher et al. | High resolution low-temperature superconductivity superconducting quantum interference device microscope for imaging magnetic fields of samples at room temperatures | |
| CN112450935B (en) | Magnetocardiogram measuring method and system based on unshielded atom magnetometer | |
| CN108401409B (en) | Open type full-band-adjusting magnetic field shielding device and magnetic field shielding method thereof | |
| Gotz et al. | Improved cryogenic current comparator setup with digital current sources | |
| Phillips et al. | Construction and calibration techniques of high frequency magnetic probes | |
| CN106341975A (en) | Hybrid magnetic shielding device based on high temperature superconducting coil | |
| CN110568384A (en) | active magnetic compensation method for ultra-sensitive atomic magnetometer | |
| Dinale et al. | Generation of long prolate volumes of uniform magnetic field in cylindrical saddle-shaped coils | |
| CN117791081A (en) | Antenna balance adjusting system | |
| Chi et al. | Low-frequency magnetic field shielding effect of artificial joint-free REBCO coils | |
| US6982553B2 (en) | Radio frequency coil with two parallel end conductors | |
| Miller et al. | Superconducting receiver coils for sodium magnetic resonance imaging | |
| JP6228931B2 (en) | Electromagnetic interference compensator during biomagnetism measurement | |
| CA1279695C (en) | Electrical coils | |
| Zhang et al. | HTS SQUID gradiometer using substrate resonators operating in an unshielded environment-A portable MCG system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |