A multi-stage collimation adjustment system and method for an induction cavity

Abstract

The present application relates to mechanical assembly collimation measurement adjustment system and adjustment method, to solve the existing multi-stage induction cavity in the process of assembly hardware matching facilities is more complex, adjustment method is complicated and so on, and proposes a kind of induction cavity multistage series collimation adjustment system and adjustment method, including laser tracker, induction cavity, induction cavity support crossbeam, target seat and measurement control net point;The present application measures the three-dimensional coordinate values of each equidistant measuring point of the guide rail edge set on the upper end of induction cavity support crossbeam using laser tracker, establishes three-dimensional device coordinate system, obtains the installation position coordinates of each stage induction cavity calibration monitoring point by monitoring the relative position relationship of the coordinate values of each stage induction cavity to be installed calibration monitoring point and the intersection coordinate values of induction cavity front and rear cover in device coordinate system Y axis direction, adjusts the three-dimensional adjustable support module of induction cavity, so that each stage induction cavity calibration monitoring point and installation position coordinate coincide, complete induction cavity multistage series collimation adjustment.

Description

Technical Field

[0001] This invention relates to a mechanical assembly collimation measurement and adjustment system and method, specifically to a multi-stage series collimation adjustment system and method for induction cavities. Background Technology

[0002] Pulse power devices typically have multiple series-connected induction cavities. The induction cavities are usually complex, hollow, disc-shaped assemblies. They are fixed to a support beam with guide rails. During assembly, adjacent induction cavities need to be aligned and inserted horizontally with their central axes in a horizontal position. The insertion point is a coaxial structure with a clearance fit between the inner and outer cylinders and is equipped with a high-vacuum radial seal. The insertion stroke is relatively short. After all the induction cavities are assembled in series, the central axis of each induction cavity should coincide with the theoretical central axis to ensure the performance of the device.

[0003] Therefore, in the assembly process of multi-stage series-connected induction cavities, it is necessary not only to ensure the coaxial accuracy of the inner and outer cylinders at the joints of adjacent induction cavities, but also to ensure the collimation accuracy of the overall central axis after the multi-stage induction cavities are assembled in series. According to the literature, the existing collimation adjustment device uses a "laser + centering device + photodiode" collimation adjustment method to assemble and adjust multi-stage induction cavities. This method has relatively complex hardware facilities, a cumbersome operation process, and low work efficiency, making it unsuitable for practical application. Apart from this, no other device or method has been found to collimate and adjust the overall central axis of the multi-stage induction cavities after series assembly, so that the coaxial accuracy of the assembly meets the design requirements. Therefore, it is very necessary to seek a new collimation adjustment device for assembling and adjusting multi-stage induction cavities. Summary of the Invention

[0004] The purpose of this invention is to solve the problems that the hardware supporting facilities of the collimation adjustment device used in the assembly process of multi-stage series induction cavities in the prior art are relatively complex, the operation process of the collimation adjustment method is relatively cumbersome, the work efficiency is low, and it is not conducive to practical application. Therefore, this invention proposes a multi-stage series collimation adjustment system and adjustment method for induction cavities.

[0005] The inventive concept of this invention is as follows: By utilizing laser tracking measurement technology, firstly, a rolling linear guide rail installed on the crossbeam supporting the induction cavity is used as a reference benchmark to establish a three-dimensional device coordinate system with the theoretical central axis of the multi-stage series induction cavities as one of the coordinate axes, and the coordinate parameter relationship between this coordinate system and the measurement control network points is measured; then, each stage of the induction cavity is calibrated to obtain the relative positional relationship between the calibration monitoring point and the center point of the front and rear insertion joints of the induction cavity, thereby obtaining the theoretical coordinate value of the monitoring point; finally, by adjusting the three-dimensional adjustable support module of the induction cavity to be inserted, the coordinates of the monitoring point are adjusted to coincide with the theoretical coordinates, so that the center point of the front and rear insertion joints coincides with the theoretical central axis, thereby realizing the collimation assembly of the multi-stage series induction cavities.

[0006] To achieve the above objectives and complete the above inventive concept, the technical solution proposed by this invention is as follows:

[0007] A multi-stage series collimation and adjustment system for sensing cavities includes a laser tracker, multiple sensing cavities connected coaxially in sequence, and a sensing cavity support beam. Its special feature is that it also includes a target seat and measurement control points.

[0008] Each of the aforementioned sensing cavities includes a housing, a front cover plate, a rear cover plate, and a cathode body fixed within the housing via the front cover plate and the rear cover plate. The cathode body has a hollow cylindrical structure, and the inner diameters of the front cover plate, the cathode body, and the rear cover plate are the same. Adjacent sensing cavities are coaxially connected via the rear cover plate of the preceding sensing cavity and the front cover plate of the following sensing cavity.

[0009] Two target mounting platforms are symmetrically arranged on the outer side of the housing. Two target mounting holes are provided at the upper end of the target mounting platforms. The four target mounting holes at the upper end of the two target mounting platforms form the calibration monitoring points of the sensing cavity. At the lower end of the target mounting platforms, corresponding to the positions of the two target mounting holes, two three-dimensional adjustable support modules are provided for multi-angle adjustment of the sensing cavity.

[0010] The measurement control network includes ground control points and wall control points, which are used to establish a three-dimensional device coordinate system; the target base is fixed in the target base mounting hole and on the measurement control network, which is used to fix the reflective target ball of the adsorption laser tracker to realize the measurement of position coordinates;

[0011] The laser tracker is positioned between two parallel sensing cavity support beams. A guide rail is provided at the upper end of the sensing cavity support beams, and a slider is provided on the guide rail. The sensing cavity is connected to the slider on the guide rail through a three-dimensional adjustable support module, so that the sensing cavity can slide along the guide rail on the sensing cavity support beams.

[0012] The laser tracker is a precision measuring instrument for three-dimensional spatial coordinates. It mainly includes an angle measurement module, a distance measurement module, a tracking control module, a reflector, a tripod, and a data processing terminal. The reflector is a reflective target ball, which is widely used in the fields of precision installation of large equipment, machining and manufacturing, and aerospace. The accompanying SA software is used for instrument operation and data post-processing.

[0013] The induction cavity is a complex hollow disc-shaped assembly. Its inner wall consists of three parts with the same inner diameter: a front cover plate, a cathode body, and a rear cover plate. These parts are fixed to the induction cavity housing with bolts, forming a coaxial surface with a uniform inner diameter.

[0014] The sensing cavity housing is symmetrically provided with target mounting platforms. Each target mounting platform has two target mounting holes at its upper end. The four target mounting holes at the upper end of the two target mounting platforms are used to form calibration monitoring points for the sensing cavity. The calibration monitoring points are distributed in four positions: left front, left rear, right front, and right rear of the sensing cavity. They are symmetrical and approximately on the same plane.

[0015] The measurement control points are divided into two types: multiple target seats fixed on the ground are called ground control points, and multiple target seats fixed on the wall are called wall control points. The two together form a three-dimensional spatial fixed position control network, which can be used for the rapid fitting and establishment of the coordinate system of a three-dimensional device.

[0016] The three-dimensional adjustable support module is a mechanical load-bearing module that can achieve three degrees of freedom adjustment: up and down, forward and backward, and left and right. Its upper end face is fixed to the sensing cavity housing by bolts. Each sensing cavity uses four sets of this module. When used together, the sensing cavity can be adjusted in six degrees of freedom: up and down, forward and backward, left and right, lateral sway angle, side sway angle, and pitch angle. Its distribution position is approximately below each monitoring point. Its lower end face is connected and fixed to the guide rail slider, so that the sensing cavity can slide smoothly on the guide rail with the slider.

[0017] Furthermore, the front cover plate is provided with a front mounting boss, and the rear cover plate is provided with a rear mounting boss. The front mounting boss of the front cover plate and the rear mounting boss of the rear cover plate are adapted to each other for assembling multiple sensing cavities in series.

[0018] The connection between the front mounting boss and the rear mounting boss is provided with;

[0019] Both the front and rear cover plates are made of aluminum alloy or stainless steel.

[0020] Both the front and rear cover plates are annular, made of aluminum alloy or stainless steel. The machining precision requirements for both the front and rear mounting bosses are high. During the series assembly of the induction chambers, the front mounting boss of the next-stage induction chamber is inserted into the rear mounting boss of the previous-stage induction chamber, forming a clearance fit between the inner and outer cylinders.

[0021] Furthermore, the target holder is a metal holder with a spherical groove on it, and a magnet is bonded inside the spherical groove;

[0022] The target holder is fixed to the target holder mounting hole and the ground control point by epoxy resin adhesive;

[0023] The target holder is fixed to the control points on the wall with bolts.

[0024] The target holder is a metal part with a spherical groove, which is fixed to the sensing cavity housing, ground control points and wall control points by bolts or epoxy glue. A strong magnet is attached to the bottom of the spherical groove, which can firmly attract the reflective target ball of the laser tracker to the target holder, ensuring that there is no wobbling gap between the two, and completing the measurement of position coordinates.

[0025] Furthermore, the upper end of the sensing cavity support beam is also provided with a positioning boss for mounting the guide rail, and the positioning boss is provided with a locking mechanism for locking the sliding of the sensing cavity by locking the slider.

[0026] The lower part of the crossbeam supporting the induction cavity is provided with a support frame, and the lower end of the support frame is provided with an adjustable pad array.

[0027] The induction cavity support beam is a long, welded structure with a support base. Two induction cavity support beams are placed side by side in parallel. A linear guide rail is fixed above one of the induction cavity support beams, and a custom-made steel rail is fixed to the upper end of the other induction cavity support beam. The mounting points of the linear guide rail and the custom-made steel rail at the upper end of the induction cavity support beam are designed with positioning bosses on the side, which have high machining linearity accuracy.

[0028] An adjustable shim array is installed at the lower end of the induction cavity support beam base, which can adjust the height of the induction cavity support beam. After adjustment, the induction cavity support beam base is fixed to the ground with bolts. A locking mechanism is installed near the guide rail at the upper end of the induction cavity support beam, which can lock the axial sliding freedom of the induction cavity along the guide rail.

[0029] The linear guide is a standard rolling linear guide, bolted to a support beam on one side. A rolling linear guide slider is mounted on the guide. High precision is required for the guide, slider, and their fit. The straightness of the linear guide is ensured to meet design specifications by adjusting the height of the adjustable shim array, guaranteeing smooth sliding of the rolling linear guide slider under load.

[0030] The custom-made steel rail is a rectangular cross-section guide rail, bolted to the supporting crossbeam on the other side. A rail slider is installed on the rail. The precision requirements for the guide rail, slider, and their fit are generally moderate. The guide rails on both crossbeams are used in combination with varying precision levels to ensure the linear accuracy of the sensing cavity along the track's sliding path while preventing the slider from jamming, ensuring smooth operation of the sensing cavity. To avoid redundancy, the rolling linear guide rail and the custom-made steel rail are collectively referred to as the guide rail, and the linear guide rail slider and the rail slider are collectively referred to as the slider.

[0031] Meanwhile, the present invention also provides a method for adjusting the multi-stage series collimation of an induction cavity, which employs the above-mentioned multi-stage series collimation system of an induction cavity, and is characterized by including the following steps:

[0032] S1. Use a laser tracker to measure the three-dimensional coordinates of each equidistant measuring point on the guide rail edge set at the upper end of the induction cavity support beam, and determine the position of the central axis of the multi-stage series induction cavity that meets the design requirements.

[0033] S2. Set the intersection of the fitting plane of the sensing cavity support beam perpendicular to the central axis of the sensing cavity and the central axis of the multi-stage sensing cavity as the origin of the coordinate system. The direction along the central axis is the Y-axis, the direction perpendicular to the central axis is the X-axis, and the direction perpendicular to the central axis is the Z-axis. Establish a three-dimensional device coordinate system, and use a laser tracker to obtain the phase coordinates of the measurement control grid points in the three-dimensional device coordinate system.

[0034] S3. Measure the initial position coordinates of the calibration monitoring points of each level of the induction cavity to be installed, as well as the position coordinates of the intersection points of the plane fitted on the outer side of the front cover plate and the plane fitted on the outer side of the rear cover plate of each level of the induction cavity with the central axis of the induction cavity of that level. Obtain the relative positional relationship between the calibration monitoring points and the front and rear covers of each level of the induction cavity to be installed. Calculate the installation position coordinates of the calibration monitoring points of each level of the induction cavity using the laser tracker measurement software.

[0035] S4. By adjusting the three-dimensional adjustable support modules of each level of the induction cavity to be installed, the coordinates of the calibration monitoring point on the induction cavity to be installed are the same as the installation position coordinates of the calibration monitoring point calculated in step S3, thereby determining the specific installation position coordinates of the induction cavity to be installed.

[0036] S5. Push the adjusted induction cavities at each level to be installed in series with the induction cavity of the previous level by the slider on the guide rail. The central axis of each induction cavity after connection coincides with the Y-axis of the three-dimensional device coordinate system. Then, mechanically lock each induction cavity to complete the collimation adjustment of the multi-level series induction cavity.

[0037] Furthermore, step S1 specifically includes:

[0038] S1.1 Hoist the two parallel induction cavity support beams to the pre-installation position, and use a laser tracker to measure the three-dimensional coordinate values ​​of each equidistant measuring point on the guide rail edge set at the upper end of the induction cavity support beam.

[0039] S1.2 Adjust the adjustable pad array at the lower end of the induction cavity support beam so that the three-dimensional coordinate values ​​of each equidistant measuring point on the edge of the guide rail meet the design requirements, and then fix the induction cavity support beam to the installation position.

[0040] S1.3. Based on the three-dimensional coordinate values ​​of each equidistant measuring point on the edge of the guide rail, fit the straight line of the edge of the guide rail, thereby determining the position of the central axis of the sensing cavity that is parallel to the straight line of the edge and whose horizontal and vertical distances both meet the design requirements.

[0041] Furthermore, step S2 specifically includes:

[0042] S2.1. Using a laser tracker, measure and fit the fitting plane of the crossbeam supporting the induction cavity perpendicular to the central axis of the induction cavity. The intersection of this fitting plane and the central axis of the multi-stage induction cavity is the origin of the coordinate system. The direction along the central axis is the Y-axis, the direction perpendicular to the horizontal direction of the central axis is the X-axis, and the direction perpendicular to the vertical direction of the central axis is the Z-axis. Establish a three-dimensional device coordinate system.

[0043] S2.2. The ground control points and wall control points of the measurement control network are measured by a laser tracker to obtain the phase coordinates of each network point in the three-dimensional device coordinate system.

[0044] S2.3 When the installation position of the laser tracker changes, remeasure the phase coordinates of each point on the measurement control network, and re-establish the three-dimensional device coordinate system according to the phase coordinate relationship of each point in the three-dimensional device coordinate system in step S2.2.

[0045] Specifically, a fitting plane perpendicular to the central axis of the induction cavity is obtained by measuring and fitting on the crossbeam supporting the induction cavity using a laser tracker. The distance between the intersection of this fitting plane and the central axis of the induction cavity and the center point of the central primary induction cavity or the midpoint of the central two-stage induction cavity is known by design parameters. Thus, the position of the center point of the central primary induction cavity or the midpoint of the central two-stage induction cavity can be determined and used as the origin of the coordinate system. A three-dimensional device coordinate system is established with the Y-axis along the central axis, the X-axis perpendicular to the horizontal direction of the central axis, and the Z-axis perpendicular to the vertical direction of the central axis. The laser tracker measures the relevant position coordinates based on this three-dimensional device coordinate system.

[0046] Furthermore, step S3 specifically includes:

[0047] S3.1 Push each level of sensing cavity along the guide rail to the installation position, and set the intersection of the plane fitted on the outer side of the front cover of each level of sensing cavity with the Y-axis of the three-dimensional device coordinate system as point A, and the intersection of the plane fitted on the outer side of the rear cover with the Y-axis of the three-dimensional device coordinate system as point B.

[0048] The actual central axis of the induction cavity at this stage is obtained by fitting the inner hole profiles of the front cover plate, cathode body, and rear cover plate using a laser tracker.

[0049] S3.2. Measure the initial position coordinates of the calibration monitoring points on each stage of the induction cavity using a laser tracker. Substitute these initial position coordinates into the coordinate system of the three-dimensional device, and calculate the relative position coordinates (x, y) between point A and the calibration monitoring points using the laser tracker measurement software. a y a , z a The relative position coordinates of point B and the calibration monitoring point are (x... b y b , zb );

[0050] S3.3, By pushing the slider on the guide rail to slide each stage of the induction cavity, the coordinates of point A are adjusted along the Y-axis to (x... a y ai , z a The coordinates of point B are adjusted to (x... b y bi , z b ), where y ai With y bi The set values ​​of points A and B of each level of sensing cavity on the Y-axis;

[0051] S3.4 Adjust the three-dimensional adjustable support module so that the Z-axis coordinates of two calibration monitoring points symmetrical to each other along the central axis of each stage of the sensing cavity are equal, so that the coordinates of point A satisfy (0, y ai The coordinates of point B satisfy (0, y = 0). bi The installation coordinates of the four calibration monitoring points of each level of the induction cavity are obtained by reverse calculation using the laser tracker measurement software.

[0052] Furthermore, step S4 specifically includes:

[0053] S4.1. Cyclicly and alternately adjust the two three-dimensional adjustable support modules of each stage of the induction cavity to be installed, and at the same time measure the coordinates of the four calibration monitoring points of each stage of the induction cavity using a laser tracker, so that the coordinates measured by the calibration monitoring points are the same as the installation position coordinates of the calibration monitoring points in step S3.

[0054] S4.2 Lock the three-dimensional adjustable support module to determine the specific installation position coordinates of the induction cavity to be installed.

[0055] Further, step S5 specifically involves: pushing the adjusted induction cavities of each level to be installed along the guide rail to the installation position of the next level induction cavity, so that the front mounting boss on the front cover plate is adapted to connect with the rear mounting boss on the rear cover plate of the next level induction cavity, and the central axis of each level of induction cavity after connection coincides with the Y-axis of the three-dimensional device coordinate system. Then, mechanically locking each level of induction cavity is performed to complete the collimation adjustment of the multi-level series induction cavity.

[0056] The beneficial effects of this invention are as follows:

[0057] [1] The induction cavity multi-stage series collimation adjustment system of the present invention uses a laser tracker to measure and monitor relevant values, and completes the collimation adjustment of the induction cavity multi-stage series by adjusting the three-dimensional adjustable support module. The main measuring equipment involved is only the laser tracker. Therefore, the hardware required for multi-stage induction cavity series adjustment is relatively simple, and the operation process and implementation difficulty of collimation adjustment are also simplified.

[0058] [2] The distance and angle measured by the laser tracker in this invention have high numerical accuracy. Compared with the measurement accuracy of the prior art, the measurement accuracy of this invention has achieved a significant improvement across orders of magnitude, which is more conducive to the precise adjustment and series assembly of multi-level induction cavities.

[0059] [3] In this invention, a three-dimensional device coordinate system is established by measuring control points, and the coordinates of the calibration monitoring points are monitored by a laser tracker. The installation position coordinates of the calibration monitoring points of each level of induction cavity are calculated. Then, the three-dimensional adjustable support module of each level of induction cavity is adjusted so that the coordinates of the calibration monitoring points coincide with the calculated installation position coordinates, thus completing the adjustment and installation of the induction cavity. It can be seen that the collimation adjustment method is repeatable. In the process of collimation adjustment of multi-level induction cavities, the repetitive installation and debugging steps of hardware facilities are omitted, which greatly improves the work efficiency, makes it more versatile, and makes the operation simpler.

[0060] [4] In this invention, target seats are provided in the target seat mounting hole and on the measurement control grid points. The target seats can be firmly attached to the reflective target ball of the laser tracker. By measuring the target seats with the laser tracker, the coordinate values ​​of the relevant grid points can be accurately obtained, which improves the accuracy and precision of the measurement values.

[0061] [5] In this invention, a target mounting hole is provided on the upper end of the target mounting platform to form a calibration monitoring point for the sensing cavity. The central axis of the sensing cavity can be quickly calibrated, thereby accurately establishing a three-dimensional device coordinate system for installation and adjustment of each level of sensing cavity, which greatly improves the installation efficiency of the sensing cavity.

[0062] [6] In this invention, a three-dimensional adjustable support module is provided on the outer shell of the sensing cavity. By adjusting the three-dimensional adjustable support module, the position and orientation of the sensing cavity can be adjusted efficiently and accurately, making the assembly process of the sensing cavity more precise and efficient.

[0063] [7] In this invention, the laser tracker obtains the phase coordinates of each control point in the three-dimensional device coordinate system by measuring the ground control points and the wall control points. Thus, each time the induction cavity is calibrated in series, it is not necessary to repeatedly measure the edge of the guide rail on the support beam of the induction cavity and repeatedly establish the three-dimensional device coordinate system. By measuring the phase coordinate relationship of the control points in the three-dimensional device coordinate system, the position of the laser tracker is re-determined, thereby realizing the rapid fitting and reproduction of the three-dimensional device coordinate system and greatly improving the efficiency of measurement operations. Attached Figure Description

[0064] Figure 1 This is a schematic diagram of the structure of an embodiment of the multi-stage series collimation adjustment system for the sensing cavity of the present invention;

[0065] Figure 2 This is a schematic diagram of the target holder structure in an embodiment of the present invention;

[0066] Figure 3 This is a schematic diagram showing the connection between the front cover plate and the rear cover plate of the multi-stage induction cavity in an embodiment of the present invention;

[0067] Figure 4 This is a partially enlarged schematic diagram of the connection between the front cover plate and the rear cover plate in an embodiment of the present invention.

[0068] Figure label:

[0069] 1-Laser tracker, 2-Induction cavity, 3-Induction cavity support beam, 4-Target seat, 5-Three-dimensional adjustable support module, 6-Housing, 7-Inner wall of the induction cavity, 8-Front cover plate, 9-Cathode body, 10-Rear cover plate, 11-Front mounting boss, 12-Rear mounting boss, 13-Target seat mounting platform, 14-Target seat mounting hole, 15-Ground control points, 16-Wall control points, 17-Guide rail, 18-Slider, 19-Adjustable pad array, 20-Radial sealing ring. Detailed Implementation

[0070] like Figure 1 As shown, the present invention provides a multi-stage series collimation adjustment system for sensing cavities, comprising a laser tracker 1, multiple sensing cavities 2 connected coaxially in sequence, a sensing cavity support beam 3, a three-dimensional adjustable support module 5, a target base 4, and measurement control grid points;

[0071] The laser tracker 1 is a precision measuring instrument for three-dimensional spatial coordinates. It mainly includes an angle measurement module, a distance measurement module, a tracking control module, a reflective target ball, a tripod, and a data processing terminal. It is widely used in the fields of precision installation of large equipment, mechanical processing and manufacturing, and aerospace. The accompanying SA software is used for instrument operation and data post-processing.

[0072] The sensing cavity 2 is a complex, hollow, disc-shaped assembly structure. Each sensing cavity 2 includes a housing 6, a front cover plate 8, a rear cover plate 10, and a cathode body 9 fixed within the housing 6 by the front cover plate 8 and the rear cover plate 10. The cathode body 9 is a hollow cylindrical structure. The front cover plate 8, the cathode body 9, and the rear cover plate 10 have the same inner diameter. Adjacent sensing cavities 2 are coaxially connected by the rear cover plate 10 of the preceding sensing cavity 2 and the front cover plate 8 of the following sensing cavity 2. The inner walls of multiple front cover plates 8, cathode bodies 9, and rear cover plates 10 with the same inner diameter and coaxially connected in sequence constitute the inner wall 7 of the sensing cavity. The inner wall 7 of the sensing cavity is fixed to the housing 6 of the sensing cavity 2 by bolts, forming a coaxial surface with a uniform inner diameter. The front cover plate 8 and the rear cover plate 10 are both annular covers and are made of aluminum alloy or stainless steel. Figure 3 and Figure 4As shown, a front mounting boss 11 is provided on the front cover plate 8, and a rear mounting boss 12 is provided on the rear cover plate 10. The front mounting boss 11 of the front cover plate 8 and the rear mounting boss 12 of the rear cover plate 10 are adapted and connected to each other for assembling multiple sensing cavities 2 in series. The front mounting boss 11 of the next-level sensing cavity 2 is inserted into the rear mounting boss 12 of the previous-level sensing cavity 2 to form a clearance fit between the inner and outer cylinders.

[0073] Two target mounting platforms 13 are symmetrically arranged on the outer side of the housing 6. Each target mounting platform 13 has two target mounting holes 14 at its upper end. The four target mounting holes 14 at the upper end of the two target mounting platforms 13 are used to form calibration monitoring points for the sensing cavity. The calibration monitoring points are distributed at four positions: left front, left rear, right front, and right rear of the sensing cavity 2, which are symmetrical and on the same plane. At the lower end of each target mounting platform 13, corresponding to the two target mounting holes 14, two three-dimensional adjustable support modules 5 are arranged for multi-angle adjustment of the sensing cavity 2.

[0074] Among them, the three-dimensional adjustable support module 5 is a mechanical bearing module that can realize three degrees of freedom adjustment: up and down, front and back, and left and right. Its upper end face is fixed to the housing 6 of the sensing cavity 2 by bolts. Each sensing cavity 2 adopts two three-dimensional adjustable support modules 5. When used together, the sensing cavity 2 can adjust a total of six degrees of freedom: up and down, front and back, left and right, lateral sway angle, side sway angle, and pitch angle. They are distributed below each calibration monitoring point. Its lower end face is fixedly connected to the slider 18 on the guide rail 17, so that the sensing cavity 2 can slide smoothly on the guide rail 17 with the slider.

[0075] The measurement control network includes ground control points 15 and wall control points 16. Target seats 4 are set in the target seat mounting holes 14 and on the measurement control network. Multiple target seats 4 fixed on the ground are called ground control points 15, and multiple target seats 4 fixed on the wall are called wall control points 16. The two work together to form a three-dimensional spatial fixed position control network, which can be used for the rapid fitting and establishment of the coordinate system of a three-dimensional device.

[0076] like Figure 2 As shown, the target base 4 is a metal base with a spherical groove. It is fixed to the target base mounting hole 14 and the ground control point 15 by epoxy resin adhesive, and fixed to the wall control point 16 by bolts. A strong magnet is bonded in the spherical groove, which can firmly attract the reflective target ball of the laser tracker 1 to the target base 4, ensuring that there is no shaking gap between the two, so as to realize the measurement of position coordinates.

[0077] The laser tracker 1 is positioned between two parallel sensing cavity support beams 3. A guide rail 17 is provided at the upper end of the sensing cavity support beam 3, and a slider 18 is provided on the guide rail 17. The sensing cavity 2 is connected to the slider 18 on the guide rail 17 through a three-dimensional adjustable support module 5, so that the sensing cavity 2 can slide along the guide rail 17 on the sensing cavity support beam 3.

[0078] The upper end of the sensing cavity support beam 3 is also provided with a locking mechanism for locking the sliding of the sensing cavity 2, which can lock the axial sliding degree of freedom of the sensing cavity 2 along the guide rail 17. The lower end of the sensing cavity support beam 3 is provided with an adjustable pad array.

[0079] The induction cavity support beam 3 is a long, welded structure with a support base. Two induction cavity support beams 3 are placed side by side in parallel. A linear guide rail is fixed to the upper end of one induction cavity support beam 3, and a custom-made steel rail is fixed to the upper end of the other induction cavity support beam 3. The mounting points of the linear guide rail and the custom-made steel rail at the upper end of the induction cavity support beam 3 are designed with positioning bosses on the sides, which have high machining straightness accuracy. An adjustable shim array 19 is provided at the lower end of the induction cavity support beam 3, which can adjust the height of the induction cavity support beam 3. After adjustment, the induction cavity support beam 3 is fixed to the ground with bolts.

[0080] The linear guide is a standard rolling linear guide, bolted to the crossbeam 3 supporting the induction cavity on one side. A rolling linear guide slider 18 is mounted on the guide rail 17, and the fit between the guide rail 17 and the slider 18 requires high precision. By adjusting the height of the adjustable shim array 19, the straightness of the linear guide is made to meet the design specifications, ensuring that the rolling linear guide slider 18 can slide smoothly on the guide rail 17 under load.

[0081] The custom-made steel rail is a rectangular cross-section guide rail, bolted to the supporting beam 3 of the sensing cavity on the other side. A rail slider 18 is installed on the rail. The fitting precision requirements between the guide rail 17 and the slider 18 are generally low. The guide rails 17 on both sides of the supporting beam 3 of the sensing cavity are used in a coordinated manner, with one high precision and the other low precision, to ensure the straightness of the sensing cavity 2 along the track's sliding trajectory while preventing the slider 18 from jamming, allowing the sensing cavity 2 to run smoothly. The rolling linear guide rail is a standardized product with model code 55.

[0082] The induction cavity support beam 3 is a welded component made of Q235-B steel, approximately 2 meters high. Each induction cavity support beam 3 has two bases, spanning approximately 3 meters. The upper end of the induction cavity support beam 3 is designed with a positioning boss for positioning the guide rail 17, and the bases are designed with mounting holes for fixing to the ground. The custom-made steel rail is made of 42CrMo material that has undergone heat treatment and has a radial cross-sectional dimension of 90mm × 50mm.

[0083] The adjustable pad array 19 is a standardized product with a double-sloped structure. It is made of cast iron, has strong load-bearing capacity and is resistant to deformation. The maximum load of a single piece is 5 tons, and the height is adjustable within a range of about 10mm. There are 4 adjustable pad arrays 19 arranged in a 2×2 pattern under the base of the crossbeam 3 supporting each sensing cavity.

[0084] Meanwhile, this invention also provides a method for adjusting the collimation of multi-stage series induction cavities. The adjustment principle utilizes laser tracker 1 measurement technology. First, the guide rail 17 mounted on the induction cavity support beam 3 is used as a reference to establish an installation coordinate system with the theoretical central axis of the multi-stage series induction cavities 2 as one of the coordinate axes. Then, each stage of the induction cavity 2 is calibrated to obtain the relative positional relationship between the calibration monitoring point and the center point of the front and rear insertion points of the induction cavity 2, thereby obtaining the theoretical coordinate values ​​of the calibration monitoring points. Finally, by adjusting the three-dimensional adjustable support module 5 of the induction cavity 2 to be inserted, the coordinates of the calibration monitoring points are adjusted to coincide with the theoretical coordinates, making the center points of the front and rear insertion points coincide with the theoretical central axis, thus achieving the collimation assembly of the multi-stage series induction cavities 2. The advantages of this invention are simple operation, high installation accuracy, good repeatability, and strong versatility.

[0085] The multi-stage series collimation adjustment method for the sensing cavity of the present invention specifically includes the following steps:

[0086] Step 1: Hoist the two parallel induction cavity support beams 3 to the pre-installation position. Fix the guide rail 17 set on the upper end of the induction cavity support beam 3 to the positioning boss with bolts. Set up the laser tracker between the two induction cavity support beams 3 to facilitate bidirectional observation. Use the laser tracker 1 to measure the three-dimensional coordinate values ​​of each equidistant measuring point on the edge of the guide rail 17 set on the upper end of the induction cavity support beam 3.

[0087] Step 2: Adjust the adjustable pad array 19 at the lower end of the induction cavity support beam 3, and at the same time use the laser tracker 1 to measure the equidistant measuring points on the edge of the guide rail 17 so that the three-dimensional coordinate values ​​of the equidistant measuring points on the edge of the guide rail 17 meet the design requirements. Then, use bolts to fix the induction cavity support beam 3 to the installation position.

[0088] Step 3: Based on the three-dimensional coordinate values ​​of each equidistant measuring point on the edge of the guide rail 17, fit the straight line of the edge of the guide rail 17, thereby determining the position of the central axis of the sensing cavity 2 that is parallel to the straight line of the edge and whose horizontal and vertical distances meet the design requirements.

[0089] Step 4: Use laser tracker 1 to measure and fit the fitting plane of the induction cavity support beam 3 perpendicular to the central axis of the induction cavity 2. The intersection of this fitting plane and the central axis of the multi-stage induction cavity 2 is the origin of the coordinate system. The direction along the central axis is the Y-axis, the direction perpendicular to the central axis is the X-axis, and the direction perpendicular to the central axis is the Z-axis. Establish a three-dimensional device coordinate system.

[0090] The laser tracker 1 measures the ground control point 15 and the wall control point 16 of the measurement control network, and obtains the phase coordinates of each network point in the three-dimensional device coordinate system.

[0091] When the installation position of the laser tracker 1 changes, the phase coordinates of each point on the measurement control network are remeasured, and the three-dimensional device coordinate system is re-established based on the phase coordinate relationship of each point in the three-dimensional device coordinate system.

[0092] The distance between each target seat of the ground control point 15 and the wall control point 16 is about 3-5 meters, and the fixed height of the wall control point 16 is about 1.8 meters. The target seat 4 of the ground control point 15 is fixed to the ground concrete with epoxy resin, and the target seat 4 of the wall control point 16 is fixed to the wall with expansion bolts to prevent mechanical loosening from affecting the accuracy of the measurement control points.

[0093] Step 5: Push each stage of the induction cavity 2 along the guide rail 17 to the installation position. Set point A as the intersection of the plane fitted to the outer side of the front cover plate 8 of each stage of the induction cavity 2 and the Y-axis of the three-dimensional device coordinate system, and point B as the intersection of the plane fitted to the outer side of the rear cover plate 10 and the Y-axis of the three-dimensional device coordinate system. The actual central axis of this stage of the induction cavity 2 is obtained by fitting the inner hole profiles of the front cover plate 8, cathode body 9, and rear cover plate 10 using the laser tracker 1. Measure the initial position coordinates of the calibration monitoring points formed by the target seats 4 within the four target seat mounting holes 14 on each stage of the induction cavity 2 using the laser tracker 1. Substitute the initial position coordinates of the calibration monitoring points into the three-dimensional device coordinate system, and calculate the relative position coordinates (x, y) between point A and the calibration monitoring points using the laser tracker measurement software. a y a , z a The relative coordinates of point B and the calibration monitoring point are (x... b y b , z b );

[0094] The slider 18 on the guide rail 17 pushes the induction cavities 2 of each stage to slide, adjusting the coordinates of point A along the Y-axis to (x... a y ai , z a The coordinates of point B are adjusted to (x... b y bi , z b ), where y ai With y bi These are the set values ​​for points A and B on the Y-axis of each level of sensing cavity 2.

[0095] Step Six: Adjust the height of the three-dimensional adjustable support module 5 so that the Z-axis coordinates of two calibration monitoring points symmetrical to each other along the central axis of each stage of the sensing cavity 2 are equal, and make the coordinates of point A satisfy (0, y ai The coordinates of point B satisfy (0, y = 0). bi The installation coordinates of the four calibration monitoring points of each level of induction cavity 2 are obtained by reverse calculation using laser tracker measurement software.

[0096] Step 7: Alternately adjust the two three-dimensional adjustable support modules 5 of each stage of the induction cavity 2 to be installed, and at the same time measure the coordinates of the four calibration monitoring points of each stage of the induction cavity 2 using the laser tracker 1, so that the coordinates measured by the calibration monitoring points are the same as the installation position coordinates of the calibration monitoring points in Step 6, and the allowable error after adjustment is 0.05mm; then lock the three-dimensional adjustable support module 5 to complete the adjustment and installation of the induction cavity 2 to be installed.

[0097] Step 8: Push the adjusted induction cavities 2 of each level to the installation position of the next level induction cavity along the guide rail 17, so that the front mounting boss 11 on the front cover plate 8 is adapted to connect with the rear mounting boss 12 on the rear cover plate 10 of the next level induction cavity 2. After connection, the central axis of each level of induction cavity 2 coincides with the Y-axis of the three-dimensional device coordinate system. Then, mechanically lock each level of induction cavity 2 to complete the collimation adjustment of the multi-level series induction cavity 2.

Claims

1. A multi-stage series collimation adjustment system for sensing cavities, comprising a laser tracker (1), multiple sensing cavities (2) connected coaxially in sequence, and a sensing cavity support beam (3); characterized in that: It also includes target base (4) and measurement control points; Each of the aforementioned sensing cavities (2) includes a housing (6), a front cover plate (8), a rear cover plate (10), and a cathode body (9) fixed inside the housing (6) by the front cover plate (8) and the rear cover plate (10). The cathode body (9) is a hollow cylindrical structure, and the inner diameters of the front cover plate (8), the cathode body (9), and the rear cover plate (10) are the same. Adjacent sensing cavities (2) are coaxially connected by the rear cover plate (10) of the previous sensing cavity (2) and the front cover plate (8) of the next sensing cavity (2). Two target mounting platforms (13) are symmetrically arranged on the outer side of the housing (6). Two target mounting holes (14) are provided at the upper end of the target mounting platform (13). Two three-dimensional adjustable support modules (5) are provided at the lower end of the target mounting platform (13) corresponding to the two target mounting holes (14) for multi-angle adjustment of the sensing cavity (2). The measurement control network includes ground control points (15) and wall control points (16), which are used to establish a three-dimensional device coordinate system; The target holder (4) is fixed in the target holder mounting hole (14) and on the measurement control grid point, and is used to fix the reflective target ball of the adsorption laser tracker to realize the measurement of position coordinates; The laser tracker (1) is set between two parallel sensing cavity support beams (3); the upper end of the sensing cavity support beam (3) is provided with a guide rail (17), and a slider (18) is provided on the guide rail (17); the sensing cavity (2) is connected to the slider (18) on the guide rail (17) through a three-dimensional adjustable support module (5). The front cover plate (8) is provided with a front mounting boss (11), and the rear cover plate (10) is provided with a rear mounting boss (12). The front mounting boss (11) of the front cover plate (8) and the rear mounting boss (12) of the rear cover plate (10) are adapted to be connected and used to assemble multiple sensing cavities (2) in series.

2. The induction cavity multi-stage series collimation adjustment system according to claim 1, characterized in that: A radial sealing ring (20) is provided at the connection between the front mounting boss (11) and the rear mounting boss (12). Both the front cover (8) and the rear cover (10) are made of aluminum alloy or stainless steel.

3. The induction cavity multi-stage series collimation adjustment system according to claim 2, characterized in that: The target base (4) is a metal base with a spherical groove on it, and a magnet is glued in the spherical groove; the target base (4) is fixed in the target base mounting hole (14) and on the ground control network point (15) by epoxy resin glue; The target base (4) is fixed to the control point (16) on the wall by bolts.

4. The induction cavity multi-stage series collimation adjustment system according to claim 3, characterized in that: The upper end of the sensing cavity support beam (3) is also provided with a positioning boss for installing the guide rail (17), and a locking mechanism for locking the sliding of the sensing cavity (2) is provided on the positioning boss; the lower part of the sensing cavity support beam (3) is provided with a support frame, and the lower end of the support frame is provided with an adjustable pad array (19).

5. A method for multi-stage series collimation adjustment of an induction cavity, employing the multi-stage series collimation adjustment system of an induction cavity as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Using a laser tracker (1), measure the three-dimensional coordinates of each equidistant measuring point on the edge of the guide rail (17) set at the upper end of the crossbeam (3) supporting the induction cavity, and determine the position of the central axis of the multi-stage series induction cavity (2) that meets the design requirements. S2. Set the intersection of the fitting plane of the sensing cavity support beam (3) perpendicular to the central axis of the sensing cavity (2) and the central axis of the multi-level sensing cavity (2) as the origin of the coordinate system. The direction along the central axis is the Y-axis, the direction perpendicular to the central axis is the X-axis, and the direction perpendicular to the central axis is the Z-axis. Establish a three-dimensional device coordinate system and use the laser tracker (1) to obtain the phase coordinates of the measurement control network points in the three-dimensional device coordinate system. S3. Measure the initial position coordinates of the calibration monitoring points of each level of the induction cavity (2) to be installed, as well as the position coordinates of the intersection of the plane fitted on the outside of the front cover plate (8) and the plane fitted on the outside of the rear cover plate (10) of each level of the induction cavity (2) with the central axis of the induction cavity (2) of that level, and obtain the relative position relationship between the calibration monitoring points and the front cover plate (8) and the rear cover plate (10) of each level of the induction cavity (2) to be installed. Calculate the installation position coordinates of the calibration monitoring points of each level of the induction cavity (2) using the measurement software of the laser tracker (1). S4. By adjusting the three-dimensional adjustable support module (5) of each level of the sensor cavity (2) to be installed, the coordinates of the calibration monitoring point on the sensor cavity (2) to be installed are the same as the installation position coordinates of the calibration monitoring point calculated in step S3, thereby determining the specific installation position coordinates of the sensor cavity (2) to be installed. S5. Push the adjusted induction cavities (2) of each level to be installed to the previous level induction cavity (2) through the slider (18) on the guide rail (17). The central axis of each level of induction cavity (2) after connection coincides with the Y axis of the three-dimensional device coordinate system. Then, mechanically lock each level of induction cavity (2) to complete the collimation adjustment of the multi-level series induction cavity (2).

6. The method for adjusting multi-stage series collimation of an induction cavity according to claim 5, characterized in that, Step S1 is as follows: S1.

1. Hoist the two parallel induction cavity support beams (3) to the pre-installation position and use the laser tracker (1) to measure the three-dimensional coordinate values ​​of each equidistant measuring point on the edge of the guide rail (17) set at the upper end of the induction cavity support beam (3). S1.2 Adjust the adjustable pad array (19) at the lower end of the induction cavity support beam (3) so that the three-dimensional coordinate values ​​of each equidistant measuring point on the edge of the guide rail (17) meet the design requirements, and then fix the induction cavity support beam (3) to the installation position. S1.

3. Based on the three-dimensional coordinate values ​​of each equidistant measuring point on the edge of the guide rail (17), fit the straight line of the edge of the guide rail (17), thereby determining the position of the central axis of the sensing cavity that is parallel to the straight line of the edge and whose horizontal and vertical distances meet the design requirements.

7. The method for adjusting multi-stage series collimation of an induction cavity according to claim 6, characterized in that, Step S2 is as follows: S2.

1. Using a laser tracker (1), measure and fit the fitting plane of the induction cavity support beam (3) perpendicular to the central axis of the induction cavity (2). The intersection of the fitting plane and the central axis of the multi-stage induction cavity (2) is the origin of the coordinate system. The direction along the central axis is the Y-axis, the direction perpendicular to the central axis is the X-axis, and the direction perpendicular to the central axis is the Z-axis. Establish a three-dimensional device coordinate system. S2.

2. The ground control network point (15) and wall control network point (16) of the measurement control network point are measured by laser tracker (1) to obtain the phase coordinates of each network point in the three-dimensional device coordinate system. S2.3 When the installation position of the laser tracker (1) changes, the phase coordinates of each point on the measurement control network are remeasured, and the three-dimensional device coordinate system is re-established according to the phase coordinate relationship of each point in the three-dimensional device coordinate system in step S2.

2.

8. The method for adjusting multi-stage series collimation of an induction cavity according to claim 7, characterized in that, Step S3 is as follows: S3.1 Push the induction cavities (2) of each level along the guide rail (17) to the installation position, and set the intersection of the plane fitted on the outer side of the front cover plate (8) of each level of induction cavity (2) with the Y-axis direction of the three-dimensional device coordinate system as point A, and the intersection of the plane fitted on the outer side of the rear cover plate (10) with the Y-axis direction of the three-dimensional device coordinate system as point B. S3.

2. Using a laser tracker (1), measure the initial position coordinates of the calibrated monitoring points on each stage of the induction cavity (2). Substitute the initial position coordinates of the calibrated monitoring points into the coordinate system of the three-dimensional device, and calculate the relative position coordinates of point A and the calibrated monitoring points using the laser tracker measurement software. a y a , z a The relative position coordinates of point B and the calibration monitoring point are (x... b y b , z b ); S3.3, By using the slider (18) on the guide rail (17) to push the induction cavities (2) of each stage to slide, the coordinates of point A along the Y-axis are adjusted to (x a y ai , z a The coordinates of point B are adjusted to (x... b y bi , z b ), where: y ai With y bi The set values ​​of points A and B on the Y-axis for each level of sensing cavity (2); S3.4 Adjust the three-dimensional adjustable support module (5) so that the Z-axis coordinate values ​​of the two calibration monitoring points that are symmetrical about each other along the central axis of each stage of the sensing cavity (2) are equal, and make the coordinates of point A satisfy (0, y ai The coordinates of point B satisfy (0, y = 0). bi ,0), the installation position coordinates of the four calibration monitoring points of each level of induction cavity (2) are obtained by reverse calculation through the laser tracker (1) measurement software.

9. The method for adjusting multi-stage series collimation of an induction cavity according to claim 8, characterized in that, Step S4 is as follows: S4.

1. The two three-dimensional adjustable support modules (5) of the induction cavity (2) to be installed at each level are adjusted alternately in a cyclic manner. At the same time, the coordinates of the four calibration monitoring points of the induction cavity (2) at each level are measured by the laser tracker (1) so that the coordinates measured by the calibration monitoring points are the same as the installation position coordinates of the calibration monitoring points in step S3. S4.2 Lock the three-dimensional adjustable support module (5) to determine the specific installation position coordinates of the induction cavity (2) to be installed.

10. The method for adjusting multi-stage series collimation of an induction cavity according to claim 9, characterized in that, Step S5 is as follows: The adjusted induction cavities (2) are pushed along the guide rail (17) to the installation position of the next induction cavity (2), so that the front mounting boss (11) on the front cover plate (8) and the rear mounting boss (12) on the rear cover plate (10) of the next induction cavity (2) are adapted and connected. The central axis of each induction cavity (2) after connection coincides with the Y-axis of the three-dimensional device coordinate system. Then, the induction cavities (2) are mechanically locked to complete the collimation adjustment of the multi-stage series induction cavities (2).

Images