CN114167328A - Dipolar deflection magnet borrowing magnetic measurement method - Google Patents
Dipolar deflection magnet borrowing magnetic measurement method Download PDFInfo
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- CN114167328A CN114167328A CN202210123250.9A CN202210123250A CN114167328A CN 114167328 A CN114167328 A CN 114167328A CN 202210123250 A CN202210123250 A CN 202210123250A CN 114167328 A CN114167328 A CN 114167328A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0023—Electronic aspects, e.g. circuits for stimulation, evaluation, control; Treating the measured signals; calibration
- G01R33/0035—Calibration of single magnetic sensors, e.g. integrated calibration
Abstract
The application discloses a dipolar deflection magnet borrowing magnetic measurement method, which comprises the following steps: dividing a magnetic measurement area of the dipolar deflection magnet to be measured into more than two magnetic measurement sub-areas with the measurement stroke less than or equal to the measurement stroke according to the measurement stroke of the Hall point measurement machine; sequentially moving each magnetic sub-area to the range of each measuring stroke, and measuring to obtain the measuring data of each magnetic sub-area, wherein the measuring data comprises the relative coordinates of the magnetic sub-areas and the magnetic field quantity under the relative coordinates; and splicing the measurement data of each magnetic measurement sub-region according to the corresponding relation between the absolute coordinates and the relative coordinates of the magnetic measurement region to obtain the measurement data of the magnetic measurement region. According to the scheme, the stroke range of the probe rod of the Hall point measuring machine does not need to be lengthened, so that the problem of poor accuracy of a measuring result caused by the fact that the running precision of the probe rod is correspondingly reduced along with the increase of the stroke of the probe rod is solved; the measuring precision is guaranteed.
Description
Technical Field
The invention relates to the technical field of magnetic field measurement, in particular to a method for magnetically measuring the borrow of a dipolar deflection magnet.
Background
At present, a Hall point measuring machine is generally adopted to measure the magnetic field of a magnet. The measuring stroke of the Hall point measuring machine is a long rectangular area, and for a dipolar long deflection magnet with a small turning radius, the measuring stroke of the existing Hall point measuring machine cannot cover the whole magnetic measuring area, so that the Hall point measuring machine can smoothly measure, the existing method is to replace a longer probe rod to lengthen the probe rod stroke range of the Hall point measuring machine, but along with the increase of the probe rod stroke range, the running precision of the probe rod is correspondingly reduced, and the accuracy of the measuring result can be directly influenced.
Disclosure of Invention
The application expects to provide a dipolar deflection magnet borrow magnetism survey method for solve prior art, the measuring stroke of hall point survey machine can't cover whole magnetism and survey the region, and the probe rod stroke scope of extension hall point survey machine leads to the poor problem of measuring result accuracy.
In a first aspect, the present invention provides a method for magnetically measuring a two-pole deflection magnet borrowing, including:
dividing a magnetic measurement area of the dipolar deflection magnet to be measured into more than two magnetic measurement sub-areas with the measurement stroke less than or equal to the measurement stroke according to the measurement stroke of the Hall point measurement machine;
sequentially moving each magnetic sub-area to the range of each measuring stroke, and measuring to obtain the measuring data of each magnetic sub-area, wherein the measuring data comprises the relative coordinates of the magnetic sub-areas and the magnetic field quantity under the relative coordinates;
and splicing the measurement data of each magnetic measurement sub-region according to the corresponding relation between the absolute coordinates and the relative coordinates of the magnetic measurement region to obtain the measurement data of the magnetic measurement region.
As an implementation manner, before each magnetic measurement subarea is measured, the hall probes of the hall spot measuring machine are respectively aligned.
As an implementation manner, before the hall probe is aligned, the probe rod driving the hall probe to translate is reset to a detection initial position.
As an implementation manner, the collimating the hall probe of the hall spot measuring machine includes:
and taking the preset position of the Hall point measuring machine as the origin of a temporary coordinate system, measuring a first deviation of a vertical central line of the end surface of the Hall probe relative to the Z axis of the temporary coordinate system, and subtracting the first deviation from the X axis of the origin of the temporary coordinate system to be used as the zero point of the X axis of the relative coordinate.
As an implementation manner, the collimating the hall probe of the hall spot measuring machine includes:
and taking the preset position of the Hall point measuring machine as the origin of the temporary coordinate system, measuring the second deviation of the top surface of the Hall probe relative to the Y axis of the temporary coordinate system, and subtracting the second deviation from the Y axis of the origin of the temporary coordinate system to be used as the zero point of the Y axis of the relative coordinate.
As an implementation manner, the collimating the hall probe of the hall spot measuring machine includes:
and taking the preset position of the Hall point measuring machine as the origin of a temporary coordinate system, measuring a third deviation of the end surface of the Hall probe relative to the Z axis of the temporary coordinate system, and subtracting the third deviation from the Z axis of the origin of the temporary coordinate system to be used as the zero point of the Z axis of the relative coordinate.
As an implementation manner, the absolute coordinates of each of the magnetic sub-regions are calibrated, and an intersection point of one of the adjacent edge lines of each of the magnetic sub-regions is used as a measurement start bit of the current measurement, so as to determine the corresponding relationship between the absolute coordinates and the relative coordinates.
As an implementation manner, according to more than three preset positions of the to-be-measured dipolar deflection magnet, which are not in the same straight line, the circle center of the deflection radius of the to-be-measured dipolar deflection magnet is determined, the geometric circle center is used as the origin of coordinates of an absolute coordinate system, and the absolute coordinates of each magnetic measurement sub-region are determined.
As an implementation manner, the number of the magnetic measurement sub-regions is two, and after one of the magnetic measurement sub-regions is measured, the plane of the to-be-measured dipolar deflection magnet is rotated by 180 degrees, and then the other magnetic measurement sub-region is measured.
As an implementation mode, the plane of the dipolar deflection magnet to be detected is rotated by 180 degrees through an adjusting platform, and the intersection point of one adjacent side line of the magnetic detection subarea is aligned with the detection initial position of the Hall probe;
the adjustment platform includes: the device comprises a base, a driving device and a control device, wherein at least three linear drivers which are vertically arranged are arranged on the base, and the linear drivers are not on the same straight line; a horizontal seat is arranged above the linear drivers, and the execution end of each linear driver is connected with the horizontal seat ball pair; the horizontal seat is provided with a horizontal sliding rail, the horizontal sliding rail is connected with a first sliding seat in a sliding manner, the first sliding seat is connected with a second sliding seat in a sliding manner, and the sliding direction of the first sliding seat is perpendicular to that of the second sliding seat; the second sliding seat is rotatably connected with a bearing seat, and the rotating axis of the bearing seat is vertically arranged; the dipolar deflection magnet to be measured is arranged on the bearing seat.
According to the scheme, when the measuring stroke of the Hall point measuring machine cannot cover the whole magnetic measuring area of the two-pole deflection magnet, the magnetic measuring area of the two-pole deflection magnet to be measured is divided into more than two magnetic measuring sub-areas with the measuring stroke smaller than or equal to the measuring stroke according to the measuring stroke of the Hall point measuring machine, then the magnetic measuring sub-areas are measured respectively, the measuring data of the magnetic measuring sub-areas are spliced, and the measuring data of the magnetic measuring area are obtained. Compared with the prior art, the stroke range of the probe rod of the Hall point measuring machine does not need to be lengthened, so that the problem of poor accuracy of a measuring result caused by the fact that the running precision of the probe rod is correspondingly reduced along with the increase of the stroke of the probe rod is solved; the measuring precision is guaranteed.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a flowchart of a method for dipolar-deflection magnet borrowing magnetic measurement according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the principle of measuring a dipolar deflection magnet to be measured by the dipolar deflection magnet borrowing magnetic measurement method provided by the embodiment of the invention;
FIG. 3 is a front view of an adjustment platform provided in accordance with an embodiment of the present invention;
fig. 4 is a top view of fig. 3.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a method for borrowing magnetism of a dipolar deflection magnet, including:
s1: dividing a magnetic measurement area of a dipolar deflection magnet 2 to be measured into more than two magnetic measurement sub-areas which are less than or equal to the measurement stroke 1 according to the measurement stroke 1 of the Hall point measurement machine;
the hall point measuring machine is a magnetic measuring device, which has a probe rod, the probe rod can be driven by a motion executing mechanism to translate in three directions of an X axis, a Y axis and a Z axis of a space rectangular coordinate system, a hall probe is fixedly installed at a suspension end (free end) of the probe rod, and the hall probe is used for sensing the size of a magnetic field at a corresponding position.
By dividing the magnetic measurement area of the dipolar deflection magnet 2 to be measured into more than two magnetic measurement sub-areas with the measurement stroke 1 being less than or equal to the two, when each magnetic measurement sub-area is measured, one-time feeding movement of the probe rod of the Hall point measuring machine can completely cover one magnetic measurement sub-area.
S2: sequentially moving each magnetic sub-area to the range of each measuring stroke 1, and measuring to obtain the measuring data of each magnetic sub-area, wherein the measuring data comprises the relative coordinates of the magnetic sub-areas and the magnetic field quantity under the relative coordinates;
for example, but not limited to, after one magnetic measurement sub-region is measured, the dipole deflection magnet is moved to make another magnetic measurement sub-region located at a predetermined position to measure the current magnetic measurement sub-region, and after the measurement is completed, the dipole deflection magnet is moved to make another magnetic measurement sub-region located at a predetermined position to measure, and the measurements are performed in sequence until all the magnetic measurement sub-regions are measured.
The initial position of the hall probe can be used as the origin of a relative coordinate system during measurement, and the movement of the hall probe in the three directions of the above-mentioned X-axis, Y-axis and Z-axis can be used as the relative coordinate of the measured position of the dipolar deflection magnet, so that the measured magnetic field amount of the current position of the hall probe is the magnetic field amount of the current position in the relative coordinate system.
S3: and splicing the measurement data of each magnetic measurement sub-region according to the corresponding relation between the absolute coordinates and the relative coordinates of the magnetic measurement region to obtain the measurement data of the magnetic measurement region.
The magnetic measurement area of the dipolar deflection magnet 2 to be measured is known, and the magnetic measurement area of the dipolar deflection magnet 2 to be measured can be calibrated in advance to obtain the absolute coordinates of the magnetic measurement area, wherein the absolute coordinates of the magnetic measurement area are only related to the structure of the absolute coordinates and are not related to an external coordinate system. For example, a feature point of the magnetic measurement area is used as a coordinate of the magnetic measurement area to determine absolute coordinates of each position of the magnetic measurement area, and the feature point may be, but is not limited to, an end point, a middle point, a center of a circle, or the like of the magnetic measurement area.
Under the condition that the absolute coordinates of the magnetic measurement regions are fixed, the absolute coordinates of each magnetic measurement sub-region are determined and known, the initial position of measurement of each magnetic measurement sub-region is the origin of a relative coordinate point, so that the absolute coordinates of the magnetic measurement regions and the relative coordinates have a one-to-one correspondence relationship, according to the correspondence relationship, the relative coordinates can be converted into the absolute coordinates, the relative coordinates of all the magnetic measurement sub-regions are converted into the absolute coordinates, and the corresponding magnetic field quantity under the absolute coordinates can be obtained, namely, the relative coordinates of all the magnetic measurement sub-regions are converted into the absolute coordinates, and the measurement data of each magnetic measurement sub-region can be spliced into the measurement data of the magnetic measurement regions.
For example, but not limited to, the magnetic field measurement region is the magnetic field of the bi-polar deflection magnet 2 to be measured within the range from the mechanical deflection center X to the arc-shaped good field region 3 with the predetermined width, and the leakage magnetic field of the bi-polar deflection magnet 2 to be measured within the predetermined distance L from the leading end face.
In this example, the magnetic measurement region of the dipolar deflection magnet 2 to be measured is divided into two magnetic measurement sub-regions, i.e., a region a and a region B, by a symmetry plane passing through the center of the dipolar deflection magnet 2 to be measured, and the coordinates of the end points of the two magnetic measurement sub-regions of the region a and the region B are sequentially represented as a (X1, Y1), a (X2, Y3), a (X3, Y3), a (X4, Y4), B (X1, Y1), B (X2, Y3), B (X3, Y3), B (X4, Y4); wherein, A (X3, Y3), A (X4, Y4) and B (X1, Y1), B (X2, Y3) are correspondingly overlapped points.
When the measurement is carried out, the position of the to-be-measured dipolar deflection magnet 2 is adjusted, so that the area A is positioned in the measurement stroke 1 of the Hall point measuring machine, and A (X1, Y1) coincides with the origin of the relative coordinate system, of course, other points can be adopted according to actual needs, at the moment, the points in the area A and the corresponding points in the relative coordinate system establish a one-to-one correspondence relationship, for example, A (X1, Y1) corresponds to the origin of the relative coordinate system, and the like. In the measurement process of the Hall point measurement machine, the motion quantity of the Hall probe of the Hall point measurement machine is the relative coordinate, and the measurement data of the current position of the Hall point measurement machine can comprise the relative coordinate of the magnetic measurement sub-area and the magnetic field quantity under the relative coordinate.
After the measurement of the area a is completed, the position of the to-be-measured dipolar deflection magnet 2 is adjusted, so that the area B is located in the measurement stroke 1 of the hall spot-measuring machine, and B (X4, Y4) coincides with the origin of the relative coordinate system, although other points may be used according to actual needs, at this time, the points in the area B and the corresponding points in the relative coordinate system establish a one-to-one correspondence, for example, B (X4, Y4) corresponds to the origin of the relative coordinate system, and the like.
And respectively converting the magnetic field quantity under the relative coordinate of the area A and the area B into the magnetic field quantity under the absolute coordinate, namely splicing the measurement data of each magnetic measurement subarea into the measurement data of the magnetic measurement subarea.
In the process of adjusting the position of the dipolar deflection magnet 2 to be measured, the position of the dipolar deflection magnet 2 to be measured relative to the hall probe, the probe rod and the like can be measured in real time through a laser tracker, an optical theodolite, a three-dimensional laser scanner and the like, so that each magnetic measurement sub-area can be accurately adjusted to a required magnetic measurement position.
According to the scheme, when the measuring stroke 1 of the Hall point measuring machine cannot cover all the magnetic measuring areas of the two-pole deflection magnet, the magnetic measuring areas of the two-pole deflection magnet 2 to be measured are divided into more than two magnetic measuring sub-areas with the measuring stroke 1, then the magnetic measuring sub-areas are measured respectively, the measuring data of the magnetic measuring sub-areas are spliced, and the measuring data of the magnetic measuring areas are obtained. Compared with the prior art, the stroke range of the probe rod of the Hall point measuring machine does not need to be lengthened, so that the problem of poor accuracy of a measuring result caused by the fact that the running precision of the probe rod is correspondingly reduced along with the increase of the stroke of the probe rod is solved; the measuring precision is guaranteed.
As an implementation manner, in order to improve the accuracy of magnetic measurement, the hall probes of the hall spot measuring machine are respectively aligned before each magnetic measurement sub-region is measured. The method comprises the steps of firstly aligning a Hall probe of a Hall point measuring machine before measuring a first magnetic measuring subregion, then aligning the Hall probe of the Hall point measuring machine again after measuring the first magnetic measuring subregion, and then measuring a second magnetic measuring subregion until the last magnetic measuring subregion finishes measuring according to the rule. The collimation refers to calibrating the hall probe relative to the origin of the coordinate system, that is, calibrating the center of the top surface of the hall probe to the origin of the coordinate system.
As an implementation manner, before the hall probe is aligned, the probe rod driving the hall probe to translate is reset to a detection starting position, so that the hall probe is calibrated as an origin of a relative coordinate system.
When the Hall probe of the Hall point measuring machine is collimated, the Hall probe can be respectively collimated in three directions of an X axis, a Y axis and a Z axis of a space rectangular coordinate system. The Y axis is a vertical axis, the Z axis is an axis parallel to or coincident with the axis of the probe rod, and the X axis is an axis perpendicular to the Z axis.
As an implementation manner, the collimating the hall probe of the hall spot measuring machine includes:
the preset position of the Hall point measuring machine is used as a temporary coordinate system origin, for example, but not limited to, a laser ball target can be placed at the root of the probe rod, the center of the ball of the laser ball target is used as the temporary coordinate system origin, the root of the probe rod can be regarded as a rigid component, and the temporary coordinate system origin is arranged on the rigid component, so that the collimation accuracy of the Hall probe is improved. And measuring a first deviation of a vertical central line of the end surface of the Hall probe relative to a Z axis of a temporary coordinate system, and subtracting the first deviation from an X axis of an original point of the temporary coordinate system to be used as an X axis zero point of the relative coordinate. The method comprises the steps of taking a laser ball target as an origin of a temporary coordinate system, finding a zero point of another X axis (X direction) by tracing points on the ground of a measuring space, establishing a temporary Z axis by using the two points, defining an optical theodolite by using an optical ball target/mirror surface laser ball target, enabling the sight line of the optical theodolite to be coaxial with the temporary Z axis, observing a vertical central line (which can be a vertical scale line carved at the middle position of the end surface of the Hall probe) of the end surface of the Hall probe by the optical theodolite, calculating the deviation between the X direction and the temporary Z axis, taking the deviation as a first deviation, taking the first deviation as a vector, and distinguishing the positive and the negative of the first deviation by using the origin of a relative coordinate system. And compensating by using the first deviation, namely subtracting the first deviation from the X axis of the origin of the temporary coordinate system to be used as the X axis zero point of the relative coordinate.
As an implementation manner, the collimating the hall probe of the hall spot measuring machine includes:
the preset position of the Hall point measuring machine is used as a temporary coordinate system origin, for example, but not limited to, a laser ball target can be placed at the root of the probe rod, the center of the ball of the laser ball target is used as the temporary coordinate system origin, the root of the probe rod can be regarded as a rigid component, and the temporary coordinate system origin is arranged on the rigid component, so that the collimation accuracy of the Hall probe is improved. And measuring a second deviation of the top surface of the Hall probe relative to the Y axis of the temporary coordinate system, and subtracting the second deviation from the Y axis of the origin of the temporary coordinate system to be used as a Y axis zero point of the relative coordinate. When measuring the second deviation, the step of measuring the first deviation follows, i.e. the optical theodolite set when measuring the first deviation is not moved. Arranging a laser ball target at the root of the probe rod, taking the center of the laser ball target as the origin of a temporary coordinate system, then taking the laser ball target down, replacing the laser ball target to be an optical target holder, then measuring the height difference between the upper surface of the Hall probe and the center of the optical target holder at the root of the probe rod by using an optical level, wherein the height difference is used as a second deviation, the second deviation is a vector, and the positive and negative of the second deviation are distinguished by the origin of a relative coordinate system. And compensating by using the second deviation, namely subtracting the second deviation from the Y axis of the origin of the temporary coordinate system to be used as the Y axis zero point of the relative coordinate.
As an implementation manner, the collimating the hall probe of the hall spot measuring machine includes:
and taking the preset position of the Hall point measuring machine as the origin of a temporary coordinate system, measuring a third deviation of the end surface of the Hall probe relative to the Z axis of the temporary coordinate system, and subtracting the third deviation from the Z axis of the origin of the temporary coordinate system to be used as the zero point of the Z axis of the relative coordinate. For example, a mirror ball target is used, the mirror ball target is tangent to the end face of the hall probe, a temporary Z-direction deviation value of the spatial coordinates is measured by an optical theodolite, the sum of the deviation value and the radius of the mirror ball target is used as a third deviation, and the third deviation is subtracted from the Y-axis of the origin of the temporary coordinate system to be used as a Z-axis zero point of the relative coordinates.
In addition to the collimation of the hall probe in the above manner, the hall probe may be collimated in a non-contact manner, for example, a spatial rectangular three-dimensional laser scanner is disposed in the test space to define the hall probe as a relative coordinate system origin, and the like.
As an implementation manner, the absolute coordinates of each magnetic sub-region are calibrated, that is, a point (e.g., the center of the deflection radius of the to-be-measured dipolar deflection magnet 2) related to the magnetic sub-region or a certain point of the magnetic sub-region is calibrated as the origin of the absolute coordinates, the absolute coordinates of each position of the magnetic sub-region are determined according to the size of the magnetic sub-region, and the intersection point of one of the adjacent side lines of each magnetic sub-region is used as the measurement start position of the current measurement, so as to determine the corresponding relationship between the absolute coordinates and the relative coordinates.
As an implementation manner, in this example, when calibrating the absolute coordinates of each magnetic measurement sub-region, the center of a circle of the deflection radius of the to-be-measured dipole deflection magnet 2 is used as the origin of coordinates of the to-be-measured dipole deflection magnet 2, then, according to more than three predetermined positions of the to-be-measured dipole deflection magnet 2, which are not on the same straight line, the center of a circle of the deflection radius of the to-be-measured dipole deflection magnet 2 is determined, the center of a circle is used as the origin of coordinates of the absolute coordinate system of the to-be-measured dipole deflection magnet 2, and the absolute coordinates of each magnetic measurement sub-region are determined. In fig. 2, the radius of the circular arc CC is the deflection radius of the dipolar deflection magnet 2 to be measured.
As an implementation manner, the number of the magnetic measuring sub-regions is two, and after one of the magnetic measuring sub-regions is measured, the plane of the to-be-measured dipolar deflection magnet 2 is rotated by 180 degrees, and then the other magnetic measuring sub-region is measured.
As an implementation manner, referring to fig. 3 and 4, the plane of the dipolar deflection magnet 2 to be detected is rotated by 180 ° by adjusting the platform, and the intersection point of one of the adjacent side lines of the magnetic sub-region is aligned with the detection start position of the hall probe;
the adjustment platform includes: a base 4, the base 4 is, for example but not limited to, a metal seat in a flat plate shape, and is used for supporting; the base 4 is provided with at least three vertically arranged linear drivers 5, the linear drivers 5 are not limited to at least any one of a pneumatic cylinder, a hydraulic cylinder, an electric push rod, a screw rod driving mechanism and the like, for example, the linear drivers 5 are not on the same straight line, so that the horizontal position of a horizontal seat is adjusted through the vertical movement of the linear drivers 5, and the dipolar deflection magnet 2 to be measured is located at a better horizontal measurement position; a horizontal seat 7 is arranged above the linear drivers 5, the execution end (namely, the end moving in the vertical direction) of each linear driver 5 is connected with the horizontal seat 7 through a ball pair 6, and the ball pair 6 is adopted for connection, so that the movement flexibility of the horizontal seat 7 during adjustment can be improved; the horizontal seat 7 is provided with a horizontal slide rail 8, for example, two parallel horizontal slide rails 8 may be provided, the horizontal slide rail 8 is connected with a first slide seat 9 in a sliding manner, the first slide seat 9 is connected with a second slide seat 12 in a sliding manner, and a sliding direction of the first slide seat 9 is perpendicular to a sliding direction of the second slide seat 12, so as to adjust the position of the dipolar deflection magnet 2 to be measured in two directions of a horizontal plane; the second sliding seat 12 is rotatably connected with a bearing seat 10, a rotation axis of the bearing seat 10 is vertically arranged, for example, a rotation shaft 11 is fixedly connected below the bearing seat 10, an axis of the rotation shaft 11 is vertically arranged, and the bearing seat 10 can rotate relative to the second sliding seat 12 through the rotation fit of the rotation shaft 11 and the second sliding seat 12, so as to drive the to-be-measured dipolar deflection magnet 2 to perform plane rotation; the dipolar deflection magnet 2 to be measured is arranged on the bearing seat 10.
As a more precise solution, the manner of comprehensive judgment can be based on the above example and combined with magnetic field inspection. For example, but not limited to, there is a certain overlap between adjacent magnetic subregions, and the overlap is sized according to specific situations, such as a certain percentage size (generally, below 10%) of the magnetic subregions or a fixed size. The two-pole deflection magnet 2 to be measured is positioned by measuring the magnetic field of the overlapped portion twice by a magnetic field measuring device, which may be the hall probe or the like.
Certainly, in some cases, in order to avoid that the magnetic field distribution of the dipolar deflection magnet 2 to be measured is continuous and positioning accuracy is affected, a plurality of temporary interference sources may be temporarily arranged on the dipolar deflection magnet 2 to be measured, the arrangement position of the temporary interference sources may be a fixed position on the dipolar deflection magnet 2 to be measured, and at least two magnetic measurement sub-regions are arranged, during measurement, the measurement data of each magnetic measurement sub-region is pieced together based on the coordinates of the above example to obtain one measurement data of the magnetic measurement region, and in addition, the measurement data of each magnetic measurement sub-region is pieced together based on the position of the temporary interference source to obtain another measurement data of the magnetic measurement region; and respectively judging whether the magnetic field distribution at the splicing part is continuous or not (namely, the magnetic field size change is within a certain error) in the two measurement data, if so, taking any measurement data as final measurement data, and if not, taking the measurement data with small magnetic field size change at the splicing part as the final measurement data.
It will be understood that any orientation or positional relationship indicated above with respect to the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., is based on the orientation or positional relationship shown in the drawings and is for convenience in describing and simplifying the invention, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be considered limiting of the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A method for magnetically measuring the borrowing of a dipolar deflection magnet is characterized by comprising the following steps:
dividing a magnetic measurement area of the dipolar deflection magnet to be measured into more than two magnetic measurement sub-areas with the measurement stroke less than or equal to the measurement stroke according to the measurement stroke of the Hall point measurement machine;
sequentially moving each magnetic sub-area to the range of each measuring stroke, and measuring to obtain the measuring data of each magnetic sub-area, wherein the measuring data comprises the relative coordinates of the magnetic sub-areas and the magnetic field quantity under the relative coordinates;
and splicing the measurement data of each magnetic measurement sub-region according to the corresponding relation between the absolute coordinates and the relative coordinates of the magnetic measurement region to obtain the measurement data of the magnetic measurement region.
2. The dipolar-deflection magnet borrowing magnetic testing method of claim 1, wherein a hall probe of the hall spot tester is aligned separately before each magnetic sub-region is measured.
3. The dipolar-deflection magnet borrowing magnetic testing method according to claim 2, wherein a probe rod driving the hall probe to translate is reset to a detection start position before the hall probe is aligned.
4. The dipolar-deflection magnet borrowing magnetic testing method according to claim 2 or 3, wherein the aligning the Hall probe of the Hall point testing machine comprises:
and taking the preset position of the Hall point measuring machine as the origin of a temporary coordinate system, measuring a first deviation of a vertical central line of the end surface of the Hall probe relative to the Z axis of the temporary coordinate system, and subtracting the first deviation from the X axis of the origin of the temporary coordinate system to be used as the zero point of the X axis of the relative coordinate.
5. The method of claim 4, wherein the method further comprises the step of measuring the bias voltage,
the aligning of the Hall probe of the Hall point measuring machine comprises the following steps:
and taking the preset position of the Hall point measuring machine as the origin of the temporary coordinate system, measuring the second deviation of the top surface of the Hall probe relative to the Y axis of the temporary coordinate system, and subtracting the second deviation from the Y axis of the origin of the temporary coordinate system to be used as the zero point of the Y axis of the relative coordinate.
6. The ambipolar deflection magnet borrowing magnetic test method according to claim 5, wherein the aligning a Hall probe of the Hall point measuring machine comprises:
and taking the preset position of the Hall point measuring machine as the origin of a temporary coordinate system, measuring a third deviation of the end surface of the Hall probe relative to the Z axis of the temporary coordinate system, and subtracting the third deviation from the Z axis of the origin of the temporary coordinate system to be used as the zero point of the Z axis of the relative coordinate.
7. The dipolar-deflection magnet borrowing magnetic measurement method according to any one of claims 1-3, wherein absolute coordinates of each magnetic sub-region are calibrated, and an intersection point of one adjacent side line of each magnetic sub-region is used as a measurement starting position of current measurement to determine the corresponding relation between the absolute coordinates and the relative coordinates.
8. The dipolar deflection magnet borrowing magnetic measurement method according to claim 7, wherein the circle center of the deflection radius of the dipolar deflection magnet to be measured is determined according to more than three preset positions of the dipolar deflection magnet to be measured, which are not in the same straight line, the circle center is used as the origin of coordinates of an absolute coordinate system, and the absolute coordinates of each magnetic measurement sub-area are determined.
9. The dipolar-deflection magnet borrowing magnetic measurement method according to any one of claims 1-3, wherein the number of the magnetic measurement sub-regions is two, and after one of the magnetic measurement sub-regions is measured, the plane of the dipolar-deflection magnet to be measured is rotated by 180 degrees, and then the other magnetic measurement sub-region is measured.
10. The dipolar deflection magnet borrowing magnetic measurement method according to claim 9, wherein the plane of the dipolar deflection magnet to be measured is rotated by 180 degrees through an adjusting platform, and the intersection point of one adjacent side line of the magnetic sub-region is aligned with the detection starting position of the hall probe;
the adjustment platform includes: the device comprises a base, a driving device and a control device, wherein at least three linear drivers which are vertically arranged are arranged on the base, and the linear drivers are not on the same straight line; a horizontal seat is arranged above the linear drivers, and the execution end of each linear driver is connected with the horizontal seat ball pair; the horizontal seat is provided with a horizontal sliding rail, the horizontal sliding rail is connected with a first sliding seat in a sliding manner, the first sliding seat is connected with a second sliding seat in a sliding manner, and the sliding direction of the first sliding seat is perpendicular to that of the second sliding seat; the second sliding seat is rotatably connected with a bearing seat, and the rotating axis of the bearing seat is vertically arranged; the dipolar deflection magnet to be measured is arranged on the bearing seat.
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