CN112731229A - Measuring device and measuring method for cylindrical target - Google Patents
Measuring device and measuring method for cylindrical target Download PDFInfo
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- CN112731229A CN112731229A CN202011594035.4A CN202011594035A CN112731229A CN 112731229 A CN112731229 A CN 112731229A CN 202011594035 A CN202011594035 A CN 202011594035A CN 112731229 A CN112731229 A CN 112731229A
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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
- G01R33/10—Plotting field distribution ; Measuring field distribution
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
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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
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
本发明公开了一种用于圆柱靶的测量装置，包括：支撑机构，其被配置为能够提供使圆柱靶保持水平的可转动支撑；第一驱动模组，其被配置为能够驱动使所述圆柱靶在所述支撑机构上作轴向转动；第二驱动模组，其被配置为能够携带检测单元作相对于所述圆柱靶的多轴运动，以对所述圆柱靶进行测量。本发明能够快速判断出圆柱靶的外观尺寸及磁场强度是否合格，并能对圆柱靶的磁场强度分布作出准确的立体反映，采集的数据稳定，采集数据多，数据准确，适于推广。本发明还公开了一种用于圆柱靶的测量方法。
The invention discloses a measuring device for a cylindrical target, comprising: a support mechanism configured to provide a rotatable support for keeping the cylindrical target horizontal; a first driving module configured to drive the The cylindrical target rotates axially on the support mechanism; the second driving module is configured to carry the detection unit for multi-axis movement relative to the cylindrical target to measure the cylindrical target. The invention can quickly judge whether the appearance size of the cylindrical target and the magnetic field strength are qualified, and can accurately reflect the magnetic field strength distribution of the cylindrical target in three dimensions. The invention also discloses a measuring method for the cylindrical target.
Description
Technical Field
The invention relates to the technical field of vacuum coating test equipment, in particular to a measuring device and a measuring method for measuring the magnetic field intensity and the straightness of a cylindrical target.
Background
Cylindrical targets are commonly used as cathode targets in vacuum coating (e.g., magnetron sputtering) equipment. A cylindrical target generally comprises a hollow cylindrical tube as a target material, and a magnetic core disposed within the cylindrical tube, the magnetic core being rotatable coaxially within the cylindrical tube relative to the cylindrical tube.
In the use process of the cylindrical target, the cylindrical target is influenced by factors such as transportation, installation, high temperature and the like, so that the cylindrical target is easy to bend and deform, and poor straightness is caused. This not only adversely affects the coating quality, but also causes excessive target wear. In addition, whether the magnetic field uniformity of the cylindrical target (magnetic core) is good or not is also an important factor influencing the coating quality. Therefore, the magnetic field strength and straightness of the cylindrical target need to be measured and managed.
However, the cylindrical target has a large volume and a heavy weight, and thus a measuring device for the cylindrical target is not available. Therefore, in actual work, indexes such as magnetic field intensity and straightness of the cylindrical target material are usually detected manually. However, the method has the problems of high measurement difficulty, inaccurate measurement result, difficulty in measuring the three-dimensional surface of the target material, poor consistency between repeated measurement data and the like.
Therefore, in view of the above-mentioned disadvantages, it is necessary to design a measuring apparatus suitable for measuring the magnetic field strength, straightness, and the like of the cylindrical target.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a measuring device and a measuring method for a cylindrical target.
One technical solution of the present invention to achieve the above object is:
the invention provides a measuring device for a cylindrical target, comprising:
a support mechanism configured to be able to provide a rotatable support that keeps the cylindrical target horizontal;
the first driving module is configured to drive the cylindrical target to axially rotate on the supporting mechanism;
a second drive module configured to carry a detection unit for multi-axis movement relative to the cylindrical target for measurement of the cylindrical target.
Furthermore, the first driving module comprises a rotation driving mechanism, a transmission mechanism and a clamping mechanism which are sequentially connected, the transmission mechanism is sleeved on a target head at one end of the cylindrical target and is fixed with the cylindrical target through the clamping mechanism, and the rotation driving mechanism drives the transmission mechanism to rotate to drive the clamping mechanism and the cylindrical target fixed by the clamping mechanism to axially rotate on the supporting mechanism.
Furthermore, the transmission mechanism comprises a first gear and two second gears, the first gear is sleeved on the target head of the cylindrical target, the clamping mechanism is arranged on the side surface of the first gear, the two second gears are correspondingly arranged below the first gear in a slant mode, a tooth-shaped conveyor belt matched with the first gear is sleeved on the first gear and the second gear together, and the rotation driving mechanism is connected with one of the second gears.
Furthermore, fixture is including locating movable snap ring on the first side of first gear, and locate the activity of first gear on the relative second side is pressed and is pressed, wherein, first side is for the one side of relative target head, the snap ring is used for fixing the periphery of target head, press and be used for by stretch out in the target head locate the hollow magnetic core in the cylinder target tip the tip periphery press in order to restrain its relative rotation.
Further, the support mechanism includes two pairs of rotating wheels configured to provide rotatable support of the cylindrical target from below a target head end side and a target tail end side of the cylindrical target, respectively.
Furthermore, the second driving module comprises a z-direction translation mechanism, an x-direction translation mechanism and a y-direction lifting mechanism which are sequentially and orthogonally connected; the z-direction translation mechanism is configured to drive the x-direction translation mechanism to move horizontally relative to the axial direction of the cylindrical target, the x-direction translation mechanism is configured to drive the y-direction lifting mechanism to move horizontally relative to the axial direction of the cylindrical target in the orthogonal direction, and the y-direction lifting mechanism is configured to drive the detection unit to move vertically relative to the axial direction of the cylindrical target in the orthogonal direction.
Furthermore, the z-direction translation mechanism comprises a z-direction electric cylinder, the x-direction translation mechanism comprises an x-direction electric cylinder, the y-direction lifting mechanism comprises a y-direction electric cylinder, the x-direction electric cylinder is arranged on a sliding block of the z-direction electric cylinder, the y-direction electric cylinder is arranged on a sliding block of the x-direction electric cylinder, and the detection unit is arranged on a sliding block of the y-direction electric cylinder.
Further, the detection unit comprises a distance measurement unit which comprises a distance meter and is used for detecting the straightness of the cylindrical target; or, the detecting element still includes magnetic field intensity detecting element, magnetic field intensity detecting element includes the teslameter, is used for detecting the magnetic field intensity of cylinder target, the teslameter with the distancer is in on the same horizontal reference line.
Further, the rotational drive mechanism includes a motor.
Further, still include: the base is used for arranging the supporting mechanism, the first driving module and the second driving module on the base; the limiting device is arranged on the base and used for axially limiting the tail end of the cylindrical target.
The invention also provides a measuring method for the cylindrical target, which comprises the following steps:
step 01: horizontally placing the cylindrical target, and defining a measuring interval along the axial direction of the cylindrical target;
step 02: a distance measuring unit is used for placing the distance measuring unit on one side of the cylindrical target and is positioned at a position corresponding to the starting point of a measuring interval, and a space rectangular coordinate system is established by taking the position as the origin of coordinates;
step 03: enabling the distance measuring unit to vertically move along the y-axis direction of a space rectangular coordinate system, and obtaining the coordinate position of a first point on the side surface of the cylindrical target, which is closest to the distance measuring unit, and a first distance between the first point and the distance measuring unit;
step 04: translating the distance measuring unit to a preset coordinate along the z-axis of a space rectangular coordinate system, and enabling the distance measuring unit to vertically move along the y-axis of the space rectangular coordinate system to obtain the coordinate position of a second point on the side surface of the cylindrical target, which is closest to the distance measuring unit, and a second distance between the second point and the distance measuring unit;
step 05: repeating the step 04 until the coordinate position of the Nth point on the side surface of the cylindrical target, which is closest to the distance measuring unit, and the Nth distance between the Nth point and the distance measuring unit are obtained; the coordinate position of the Nth point corresponds to the end point of the measuring interval, and N is a positive integer;
step 06: and obtaining a first slope of the cylindrical target on the measuring interval according to the coordinate positions of the first point and the Nth point, and obtaining a first straightness of the cylindrical target according to a maximum distance value between the first slope and the coordinate position from the second point to the Nth-1 point.
Further, still include:
step 07: returning the distance measuring unit to the coordinate position corresponding to the first point, positioning the distance measuring unit at one side of the distance measuring unit by using a magnetic field intensity detecting unit, and adjusting to enable the magnetic field intensity detecting unit to keep a first induction distance with the side surface of the cylindrical target;
step 08: moving the magnetic field intensity detection unit to a coordinate position corresponding to the first point, and rotating the cylindrical target for one circle to obtain a peak rotation angle of the cylindrical target corresponding to the detected magnetic field intensity peak value on the side surface of the cylindrical target;
step 09: rotating the cylindrical target to the peak rotation angle, enabling the magnetic field strength detection unit to move along the first slope direction, and scanning and measuring the magnetic field strength from the first point to the Nth point on the side surface of the cylindrical target between the measurement intervals to obtain a first magnetic field strength distribution along the axial direction of the cylindrical target; during measurement, the first induction distance is kept between the magnetic field intensity detection unit and the side face of the cylindrical target for measurement by adjusting according to the first distance to the Nth distance.
Further, still include:
step 10: returning the distance measuring unit to the origin of coordinates, and continuously rotating the cylindrical target by a certain angle from the peak rotation angle;
step 11: repeating the steps 03 to 06 to obtain a second slope and a second straightness of the cylindrical target;
step 12: repeating the steps 08 to 09 to obtain a second magnetic field intensity distribution along the axial direction of the cylindrical target;
step 13: and repeating the steps 10 to 12 until the cylindrical target rotates for a circle to obtain the Mth magnetic field intensity distribution along the axial direction of the cylindrical target, wherein M is a positive integer, and obtaining the three-dimensional magnetic field intensity distribution on the side surface of the cylindrical target according to the Mth magnetic field intensity distribution from the first magnetic field intensity distribution.
Compared with the prior art, the invention has the following advantages:
(1) through setting up the supporting mechanism who can free rotation's runner as the cylinder target to through the drive mechanism who has fixture and cylinder target installation cooperation, can make the cylinder target that has certain weight can steadily rotate under the drive of motor, make the rotation angle accurate measurable, and prevent cylinder target axial cluster through setting up spacingly, avoided the skew in measurement process and the phenomenon of beating, improved measurement accuracy.
(2) The detection unit can be driven to do multi-axis motion relative to the cylindrical target by setting the electric cylinder combination capable of moving along the x, y and z three-axis directions, so that the detection unit can be accurately positioned, whether the appearance size (straightness and the like) and the magnetic field intensity of the cylindrical target are qualified or not can be quickly judged, and the three-dimensional magnetic field intensity distribution of the cylindrical target can be accurately reflected.
(3) The measuring value of the distance measuring instrument is used as the reference when the distance between the teslameter and the surface of the cylindrical target is fixed, so that the distance between the teslameter and each measuring point on the surface of the cylindrical target is always kept at the consistent measuring distance, and the stability and accuracy of a plurality of data acquired by measurement are guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a measuring apparatus for a cylindrical target according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view of an installation structure of a transmission gear according to a preferred embodiment of the present invention.
Fig. 3 is a schematic view of an installation structure of a motor and a transmission gear according to a preferred embodiment of the invention.
Fig. 4 is a schematic structural diagram of a transmission gear with a clamping mechanism according to a preferred embodiment of the invention.
Fig. 5 is a schematic view of an installation structure of a rotating wheel according to a preferred embodiment of the invention.
Fig. 6 is a schematic view of an installation structure of an x-direction translation mechanism and a y-direction lifting mechanism with a detection unit according to a preferred embodiment of the present invention.
In the figure, 1, a base, 2, a gear bracket, 3, a motor (a rotary driving mechanism), 4, a first gear, 5, a y-direction lifting mechanism (a y-direction electric cylinder), 6, a cylindrical target, 7, a rotating wheel bracket, 8, a rotating wheel, 9, a limit, 10, a z-direction translation mechanism (a z-direction electric cylinder), 11, an x-direction translation mechanism (an x-direction electric cylinder), 12, a z-direction sliding block, 13, a tooth-shaped conveyor belt, 14, a second gear, 15, a pressing part (a pressing block), 16, a locking nut, 17/18, a clamping ring, 19, a hinge, 20, a distance measuring instrument (a distance measuring unit), 21, y-direction sliding blocks and 22, a tesla meter (a magnetic field intensity detecting unit)/a tesla meter probe are arranged.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is given by way of specific examples.
Please refer to fig. 1. A measuring device for a cylindrical target of the present invention may be provided on a base 1, and may include: the device comprises a supporting mechanism, a first driving module, a second driving module, a detection unit and other main structural components.
Wherein the supporting mechanism is used for providing a rotatable support for keeping the cylindrical target 6 to be measured horizontal. The first driving module is used for driving the cylindrical target 6 to axially rotate on the supporting mechanism. The second drive module is adapted to carry the detection unit for multi-axial movement relative to the cylindrical target 6, including movement (translation) in z-, x-and y-directions forming mutually orthogonal directions. The detection unit is used for measuring the cylindrical target 6.
The cylindrical target 6 includes a hollow cylindrical tube as a target material, and a magnetic core provided in the cylindrical tube. During film coating, the magnetic core can rotate coaxially in the cylindrical tube relative to the cylindrical tube.
Please refer to fig. 1 in conjunction with fig. 5. The support mechanism may comprise two pairs of wheels 8, each pair of wheels 8 comprising two freely rotatable wheels 8 arranged horizontally side by side, and each pair of wheels 8 being arranged in parallel with the axial direction of the cylindrical target 6. Each pair of wheels 8 can be mounted on the base 1 by means of a wheel support 7. Thus, the two pairs of turning wheels 8 can rotatably support the cylindrical target 6 from below the target head side (left side in the drawing) and the target tail side (right side in the drawing) of the cylindrical target 6, respectively, and can keep the cylindrical target 6 in a horizontal state.
Please refer to fig. 1. The first driving module can comprise a rotation driving mechanism 3, a transmission mechanism and a clamping mechanism which are connected in sequence. Wherein, the transmission mechanism is sleeved on the target head at one end of the cylindrical target 6 and is fixed with the cylindrical target 6 through the clamping mechanism. The rotation driving mechanism 3 drives the transmission mechanism to rotate, and drives the clamping mechanism and the cylindrical target 6 fixed by the clamping mechanism to axially rotate (autorotate) on the two pairs of rotating wheels 8.
Please refer to fig. 1 in combination with fig. 2-4. The transmission mechanism may comprise one first gear 4 and two second gears 14. The first gear 4 is suspended and sleeved on the target head of the cylindrical target 6, the two second gears 14 are correspondingly arranged below the first gear 4, and the two second gears can be arranged on the base 1 through the gear support 2. The first gear 4 and the two second gears 14 are sleeved with a tooth-shaped conveyor belt 13 matched with the first gear 4 and the two second gears 14.
The rotary drive 3 may be connected to one of the two second toothed wheels 14, and the other of the two second toothed wheels 14 may be used to adjust the tightness of the toothed belt 13 by adjusting its position on the base 1. The rotation driving mechanism 3 may include a motor 3 and a decelerator, and the motor 3 may be, for example, a servo motor 3, which may achieve precise control of the rotation angle of the cylindrical target 6, as shown in fig. 2.
As shown in fig. 3 (which shows a perspective view), the clamping mechanism is provided on the side of the first gear 4. The clamping mechanism may include a movable snap ring 17, 18 disposed on a first side (an outward side as shown) of the first gear 4, and a movable press portion 15 disposed on an opposite second side (an inward side as shown) of the first gear 4. Wherein the first side is the side of the target head opposite to the cylindrical target 6, and the snap rings 17 and 18 are used for fixing the periphery of the target head. The pressing part 15 is used for pressing the periphery of the end part of the magnetic core which extends out of the target head and is arranged in the hollow cylindrical target 6 so as to restrain the magnetic core from rotating relative to the cylindrical tube of the cylindrical target 6, namely, the magnetic core and the cylindrical tube of the cylindrical target 6 need to be relatively fixed during measurement.
Furthermore, the snap rings 17 and 18 can adopt a structure of two semicircular arc rings 17 and 18; one end of the two semi-circular rings 17 and 18 can be movably connected by a hinge 19, when the target is installed with the cylindrical target 6 through the snap rings 17 and 18, the target head is sleeved into the two semi-circular rings 17 and 18, and the other ends of the two semi-circular rings 17 and 18 are locked by the locking nuts 16 arranged at the other ends of the two semi-circular rings 17 and 18, so that the target head is clamped. Screws may also be used to further secure the target to the snap rings 17, 18.
Further, the pressing portion 15 may be formed of a pressing block 15 having a contour corresponding to the contour of the core, the pressing block 15 may be pressed against the exposed end portion of the core, and the core and the pressing block 15 may be fixed by screws.
Please refer to fig. 1 in combination with fig. 6. The second driving module can comprise a z-direction translation mechanism 10, an x-direction translation mechanism 11 and a y-direction lifting mechanism 5 which are sequentially and orthogonally connected. The z-direction translation mechanism 10 is horizontally arranged towards the axial direction of the cylindrical target 6, and is used for driving the x-direction translation mechanism 11 (including the y-direction lifting mechanism 5) to horizontally move relative to the axial direction of the cylindrical target 6. The x-direction translation mechanism 11 is horizontally arranged and perpendicular to the z-direction translation mechanism 10, and is used for moving on the z-direction translation mechanism 10 and driving the y-direction lifting mechanism 5 to horizontally move in the orthogonal direction relative to the z-direction translation mechanism 10 (the axial direction of the cylindrical target 6). The y-direction lifting mechanism 5 is vertically arranged on the x-direction translation mechanism 11 and is used for driving the detection unit to vertically move relative to the orthogonal direction of the z-direction translation mechanism 10 (the axial direction of the cylindrical target 6).
In a preferred embodiment, the z-direction translation mechanism 10 may include a z-direction electric cylinder 10, the x-direction translation mechanism 11 may include an x-direction electric cylinder 11, and the y-direction lifting mechanism 5 may include a y-direction electric cylinder 5. Wherein, a z-direction sliding block 12 is arranged on the z-direction electric cylinder 10, and an x-direction electric cylinder 11 is arranged on the z-direction sliding block 12; the x-direction electric cylinder 11 is provided with an x-direction sliding block, and the y-direction electric cylinder 5 is arranged on the x-direction sliding block; the detection unit is provided on the y-direction slider 21 of the y-direction electric cylinder 5.
Please refer to fig. 6. In an alternative embodiment, the detection unit may comprise a ranging unit 20; the ranging unit 20 may comprise a rangefinder 20, which may be, for example, a laser rangefinder 20 (illustrated as a probe of the laser rangefinder 20). The distance meter 20 is used to detect the straightness of the cylindrical target 6.
In another alternative embodiment, the detection unit may comprise both the ranging unit 20 and the magnetic field strength detection unit 22. Wherein, the distance measuring unit 20 may include a distance measuring instrument 20, for example, a laser distance measuring instrument 20; the magnetic field strength detection unit 22 may include a teslameter 22 (illustrated as a probe of the teslameter 22), the teslameter 22 being configured to detect the magnetic field strength of the cylindrical target 6.
Alternatively, teslameter 22 and rangefinder 20 may be disposed on the same horizontal reference line.
Further, still be equipped with spacing 9 structure on the base 1, spacing 9 is installed on the base 1 that is close to target tail one end for carry out axial restriction to the target tail end of cylinder target 6, prevent that cylinder target 6 from taking place axial cluster and move when measuring.
The invention also provides a measuring method for the cylindrical target, and the measuring method can be realized by using the measuring device for the cylindrical target (but is not limited to the measuring method).
The measuring method for the cylindrical target can comprise the following steps:
step 01: the cylindrical target 6 is horizontally placed on a rotating wheel 8 serving as a supporting mechanism, a target head and a magnetic core of the cylindrical target 6 are connected with a transmission mechanism (a first gear 4, clamping rings 17 and 18 and a pressing block 15) in an installing mode, meanwhile, a target tail of the cylindrical target 6 is abutted against a limit 9, and the cylindrical target 6 to be measured is installed on the measuring device, as shown in the figure 1.
Then, according to the measurement requirements, a measurement interval (i.e., a measurement length) is defined on the cylindrical target 6 in the axial direction of the cylindrical target 6.
Step 02: a distance measuring unit 20, for example, a laser distance meter 20 is mounted on a y-direction slider 21 of the y-direction electric cylinder 5 through a mounting bracket (refer to fig. 6).
At this time, the x-direction electric cylinder 11 is located on the target head side of the cylindrical target 6 and at a position corresponding to the start point of the measurement section, that is, the laser range finder 20 is also located on the target head side of the cylindrical target 6 and at a position corresponding to the start point of the measurement section.
The current position of the laser range finder 20 is defined as the origin of coordinates, and a spatial rectangular coordinate system is established.
The electric cylinders (z-direction, x-direction and y-direction electric cylinders 10, 11 and 5) can be connected with a control module, the control module can comprise a servo driver and an upper computer, and the servo driver can be controlled by the upper computer. A spatial rectangular coordinate system can be established through preset software of an upper computer, and the displacement of each electric cylinder 10, 11 and 5 is controlled according to the spatial rectangular coordinate system, so that the movement and the position (including a zero point) of the laser range finder 20 are controlled and calibrated. Through the preset software of the upper computer, the servo motor 3 of the rotary driving mechanism 3 can be controlled in rotation angle and can be linked with the control of each electric cylinder.
Step 03: at the coordinate origin position, i.e., the position corresponding to the start point of the measurement interval, the laser range finder 20 is vertically moved in the y-axis direction of the spatial rectangular coordinate system, and the coordinate position of the first point on the side surface of the cylindrical target 6 closest to the laser range finder 20 (probe) and the distance (first distance) between the first point and the laser range finder 20 are acquired.
When the laser range finder 20 is enabled to vertically move along the y axis of the space rectangular coordinate system, in order to eliminate the error of the y-direction electric cylinder 5, the error of the laser range finder 20 when vertically moving along the y axis of the space rectangular coordinate system can be corrected by controlling the combined movement of the electric cylinders in all directions according to the original point coordinate (or zero correction position), so that the laser range finder 20 is ensured to accurately vertically move along the y axis of the space rectangular coordinate system.
Step 04: the laser distance measuring instrument 20 is translated along the z-axis of the rectangular spatial coordinate system to a predetermined coordinate, that is, the position of the second measuring point in the scanning measurement in the set scanning step length in the measuring interval.
When the laser distance measuring instrument 20 is translated to the second measuring point, the moving coordinate of the laser distance measuring instrument 20 can be corrected, and the laser distance measuring instrument 20 is ensured to be accurately translated along the z-axis direction of the space rectangular coordinate system.
Similarly, the laser range finder 20 is vertically moved in the y-axis direction of the spatial rectangular coordinate system, and the coordinate position of the second point on the side surface of the cylindrical target 6 closest to the laser range finder 20 and the distance (second distance) between the second point and the laser range finder 20 are acquired.
Step 05: and repeating the step 04 by analogy until the coordinate position of the nth point on the side surface of the cylindrical target 6 closest to the laser range finder 20 and the distance (nth distance) between the nth point and the laser range finder 20 are obtained. The coordinate position of the Nth point corresponds to the end point of the measuring interval, N is a positive integer, and the value of N can be determined according to the scanning step length.
Step 06: from the coordinate positions of the first point and the nth point (last point), the slope (first slope) of the cylindrical target 6 over the measurement interval can be obtained by calculation of a software program. Further, the straightness (first straight line degree) of the cylindrical target 6 at the initial angle (e.g., set to zero degree) can be obtained from the maximum value of the distance between the first slope (which is characterized as a straight line) and the coordinate positions from the second point to the N-1 th point (the last second point).
The magnetic field intensity detection can be further carried out on the surface of the cylindrical target 6, and the method can comprise the following steps:
step 07: the laser range finder 20 is returned to the coordinate position corresponding to the first point, the teslameter 22 is mounted on the side of the laser range finder 20 by a magnetic field strength detecting unit 22 such as the teslameter 22 (the teslameter 22 and the laser range finder 20 can be mounted at the same time in practice), and the teslameter 22 (probe) is adjusted to keep a certain distance from the side of the cylindrical target 6 (first sensing distance, the teslameter probe 22 needs to keep a certain distance, such as 1 mm, from the side of the cylindrical target 6 during measurement).
Step 08: the probe of the teslameter 22 is moved to a coordinate position corresponding to the first point (which can be realized by calculating and controlling the combined motion of the electric cylinders in all directions), the cylindrical target 6 is rotated for a circle by controlling the motor 3, the peak value of the magnetic field intensity on the side surface of the cylindrical target 6 is obtained by detecting through the probe 22 of the teslameter, and the peak rotation angle of the cylindrical target 6 (namely the rotation angle of the motor 3 corresponding to the peak value) corresponding to the detected peak value of the magnetic field intensity on the side surface of the cylindrical target 6 is obtained.
Step 09: based on the rotation angle, the motor 3 is controlled to rotate, rotating the cylindrical target 6 to the peak rotation angle (at this time, the peak point on the side of the cylindrical target 6 corresponding to the peak value just faces the teslameter probe 22).
Next, the anisotropic cylinder is controlled to move the teslameter probe 22 in the first slope direction obtained in the previous step, and the magnetic field intensity from the first point to the nth point on the side surface of the cylindrical target 6 between the measurement sections is scanned and measured, thereby obtaining the magnetic field intensity distribution (first magnetic field intensity distribution) corresponding to each measurement point along the axial direction of the cylindrical target 6. During measurement, the first sensing distance between the Tesla meter probe 22 and the side face of the cylindrical target 6 is kept by controlling the anisotropic electric cylinder according to the first distance to the Nth distance, and then measurement is carried out.
Further, when measuring the magnetic field intensity, the method can further comprise:
step 10: returning the laser range finder 20 to the origin of coordinates, and continuously rotating the cylindrical target 6 by a certain angle from the peak rotation angle;
step 11: and (5) repeating the steps 03 to 06 to obtain a second slope and a second straightness of the cylindrical target 6.
Step 12: and repeating the steps 08 to 09 to obtain a second magnetic field intensity distribution along the axial direction of the cylindrical target 6.
Step 13: and (5) repeating the steps 10 to 12 until the cylindrical target 6 rotates for a circle, and obtaining the Mth magnetic field intensity distribution along the axial direction of the cylindrical target 6, wherein M is a positive integer. And obtaining the three-dimensional magnetic field intensity distribution on the side surface of the cylindrical target 6 according to the magnetic field intensity distribution from the first magnetic field intensity distribution to the Mth magnetic field intensity distribution.
The measuring device for the cylindrical target and the measuring method for the cylindrical target can quickly judge whether the appearance size (straightness and the like) and the magnetic field intensity of the cylindrical target are qualified or not, can accurately and stereoscopically reflect the magnetic field intensity distribution of the cylindrical target, and are stable in acquired data, more in acquired data, accurate in data and suitable for popularization.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that the changes and modifications of the above embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594035.4A CN112731229B (en) | 2020-12-29 | 2020-12-29 | Measuring device and measuring method for cylindrical target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011594035.4A CN112731229B (en) | 2020-12-29 | 2020-12-29 | Measuring device and measuring method for cylindrical target |
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| CN113606461A (en) * | 2021-07-31 | 2021-11-05 | 普乐新能源（蚌埠）有限公司 | Rotary column target supporting device |
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