A collimation reference plate based on multiple sensors

Abstract

The present invention relates to an alignment reference plate based on multiple sensors, the alignment reference plate comprising a tensioning wire instrument A (1), a static level (2), an electronic inclinometer (3), a tensioning wire instrument B (4), a tensioning wire instrument C (5), a tensioning wire instrument conversion seat A (6), a rectangular hollow bracket (7), a static level base (8), an electronic inclinometer base (9), an electronic inclinometer fixing seat (10), a tensioning wire instrument conversion seat B (11), a tensioning wire instrument conversion seat C (12), a 1.5-inch ceramic ball (13) and a 0.25-inch ceramic ball (14). In the present invention, each sensor has its own coordinate system, and through the coordination with the tensioning wire and the coordinate position conversion between multiple tensioning wire instruments, rapid and precise installation and measurement can be achieved without contacting a particle accelerator magnet.

Description

Technical Field

[0001] The invention relates to the technical field of position monitoring, and in particular to an alignment reference plate based on multiple sensors. Background Art

[0002] As the requirements for accelerator performance in scientific and technological research continue to increase, the technical difficulty of accelerator engineering design solutions is also increasing. Taking the fourth-generation diffraction-limited storage ring synchrotron radiation source as an example, in order to pursue ultra-high brightness and high spatial coherence, it is hoped that the beam emittance will be reduced to the diffraction limit. To this end, the storage ring is designed to have a longer circumference. For example, the storage ring of the Beijing Light Source has a circumference of about 1,300 meters, and the storage ring of the Hefei Advanced Light Source conceptual design has a circumference of about 600 meters. Secondly, the lateral focusing of the storage ring is stronger. For example, the NSLSII light source at the Brookhaven National Laboratory in the United States uses a DBA focusing structure, a beam energy of 3G electron volts, a storage ring circumference of 792 meters, and a beam emittance of 2nm.rad (pure storage ring focusing structure), and a target emittance of 0.6m.rad (with a damping wiggler of about 18 meters long); while the new storage ring light source, the European ESRF-EBS light source, uses a hybrid 7BA focusing structure, a beam energy of 6G electron volts, a storage ring circumference of 844 meters, and a beam emittance of 0.14nm.rad. Third, the new generation of electron storage rings has more "demanding" storage ring performance. For example, the dynamic aperture of the NSLSII light source storage ring is greater than 20 mm, while most storage rings using the MBA focusing structure have dynamic apertures in the millimeter range. The ALS-U light source in Berkeley, USA, has a storage ring dynamic aperture of 1 to 2 mm. The fourth generation of diffraction-limited storage ring light sources has also raised the requirements for various core accelerator technologies to a new level. Summary of the invention

[0003] The purpose of the present invention is to provide an alignment reference plate based on multiple sensors, so as to realize fast and precise installation and measurement without contacting a particle accelerator magnet.

[0004] The technical solution adopted by the present invention is: a multi-sensor based alignment reference plate, comprising a tensioning wire gauge A1, a static level 2, an electronic inclinometer 3, a tensioning wire gauge B4, a tensioning wire gauge C5, a tensioning wire gauge conversion seat A6, a rectangular hollow bracket 7, a static level base 8, an electronic inclinometer base 9, an electronic inclinometer fixing seat 10, a tensioning wire gauge conversion seat B11, a tensioning wire gauge conversion seat C12, a 1.5-inch ceramic ball 13 and a 0.25-inch ceramic ball 14; wherein, 8 1.5-inch ceramic balls 13 are evenly arranged on the left and right sides of the alignment reference plate, and their function is to establish the alignment reference plate coordinate system; a rectangular hollow bracket 7, a static level base 8, an electronic inclinometer fixing seat 10, a tensioning wire gauge conversion seat B11 and a tensioning wire gauge conversion seat C12 are connected from top to bottom by bolts. , wherein a tensioning wire meter conversion seat A6 is bolted to the top of the rectangular hollow bracket 7, and three 0.25-inch ceramic balls 14 are evenly distributed on each conversion seat or base, and their function is to establish their own sensor coordinate systems respectively, and to link them with the coordinate system of the alignment reference plate to complete the coordinate system conversion; tensioning wire meter conversion seat A6, tensioning wire meter conversion seat B11 and tensioning wire meter conversion seat C12 are bolted to tensioning wire meter A1, tensioning wire meter B4 and tensioning wire meter C5 respectively, and their function is to complete radial position monitoring; a static level 2 is bolted to the top of the static level base 8, and its function is to complete vertical position monitoring; an electronic inclinometer base 9 and an electronic inclinometer 3 are bolted to the top of the electronic inclinometer fixing seat 10, and their function is to complete the position monitoring of the tilt angle.

[0005] Furthermore, the reference plate is made of indium steel material, with a length of about 400 mm, a width of about 300 mm, and a thickness of about 30 mm. Eight 1.5-inch ceramic balls 13 are installed on both sides of the reference plate, evenly distributed on both sides of the upper surface. Five sensors, namely, a tensioning wire meter A1, a static level 2, an electronic inclinometer 3, a tensioning wire meter B4, and a tensioning wire meter C5, are distributed in sequence from top to bottom in the middle of the reference plate.

[0006] Furthermore, the alignment reference plate, through the tensioning line meter A1, the static level 2, the electronic inclinometer 3, the tensioning line meter B4, and the tensioning line meter C5, will convert the monitored coordinate positions into the coordinate system on the alignment reference plate through corresponding calculations, and use the coordinate system of the alignment reference plate as a reference as a unified coordinate system, thereby more accurately obtaining the relative position changes of the object equipment in the unified coordinate system.

[0007] The principle of the present invention is:

[0008] The multi-sensor-based alignment reference plate of the present invention needs to measure the position center of the magnet in the pre-alignment stage of the particle accelerator magnet, so it is necessary to rely on the tensioning wire on the tensioning wire meter A1 to complete the measurement. After the pre-alignment stage is completed, how to specifically reflect the position center of the magnet and have strong repeatability in the subsequent formal installation stage, then the alignment reference plate of the present invention can be used for reverse deduction. First, the magnet position data on the tensioning wire meter A1 is converted to the tensioning wire meter B4 and the tensioning wire meter C5 through the corresponding coordinate system conversion calculation formula, and then the tensioning wire on the tensioning wire meter A1 and the pre-aligned accelerator magnet are removed. Because at this time, it is equivalent to recording the magnet position data in the pre-alignment stage through the tensioning wire meter B4 and the tensioning wire meter C5. Then when entering the real installation and debugging stage, when the formal particle accelerator magnet is placed, the position data of the tensioning wire meter B4 or the tensioning wire meter C5 can be reversed to the tensioning wire meter A1. The static level 2 is used to check the position in the vertical direction, and the electronic inclinometer 3 is used to check the position in the tilt angle. The present invention can perform real-time conversion and verification of the relative positions of machine components during the installation and commissioning of the particle accelerator, and also integrate the data of each sensor and convert it to a unified coordinate system for analysis, which will greatly improve the repeatability and work efficiency of the particle accelerator magnet installation.

[0009] The beneficial effects of the present invention are:

[0010] (1) Each sensor in the present invention has its own coordinate system, and through the coordination with the tensioning wire and the coordinate position conversion between multiple tensioning wire instruments, it can achieve rapid and precise installation and measurement without contacting the particle accelerator magnet.

[0011] (2) The present invention uses a variety of sensors for monitoring, which can serve as references to improve accuracy.

[0012] (3) The present invention improves the repeatability and working efficiency of particle accelerator magnet installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the axial side of the alignment reference plate based on multiple sensors in the embodiment of the invention and its structure after the sensors are hidden, wherein: Figure 1 (a) is the isometric view of the multi-sensor based alignment reference plate. Figure 1 (b) is a schematic diagram of the structure of the multi-sensor based alignment reference plate with the sensors hidden.

[0014] Figure 2 FIG. 1 is a schematic diagram of a top view of a multi-sensor alignment reference plate according to an embodiment of the present invention and a structural diagram after the sensors are hidden, wherein: Figure 2 (a) is a top view of the multi-sensor based alignment reference plate. Figure 2(b) is a schematic diagram of the structure of the multi-sensor based alignment reference plate after the sensors are hidden.

[0015] Figure 3 Schematic diagram of a multi-sensor based alignment reference plate in an embodiment of the present invention.

[0016] Figure 4 It is a partial cross-sectional view of the conversion seat ABC of the tensioning wire meter in the multi-sensor-based alignment reference plate in the embodiment.

[0017] In the figure: 1 is a tensioning line instrument A, 2 is a static level, 3 is an electronic inclinometer, 4 is a tensioning line instrument B, 5 is a tensioning line instrument C, 6 is a tensioning line instrument conversion seat A, 7 is a rectangular hollow bracket, 8 is a static level base, 9 is an electronic inclinometer base, 10 is an electronic inclinometer fixing seat, 11 is a tensioning line instrument conversion seat B, 12 is a tensioning line instrument conversion seat C, 13 is a 1.5-inch ceramic ball, 14 is a 0.25-inch ceramic ball, 15 is a line positioning ceramic ball, 16 is a point positioning ceramic ball, and 17 is a surface positioning ceramic ball. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 , Figure 2As shown, the present invention is a multi-sensor based alignment reference plate, comprising a tensioning wire gauge A1, a static level 2, an electronic inclinometer 3, a tensioning wire gauge B4, a tensioning wire gauge C5, a tensioning wire gauge conversion seat A6, a rectangular hollow bracket 7, a static level base 8, an electronic inclinometer base 9, an electronic inclinometer fixing seat 10, a tensioning wire gauge conversion seat B11, a tensioning wire gauge conversion seat C12, a 1.5-inch ceramic ball 13 and a 0.25-inch ceramic ball 14, wherein 8 1.5-inch ceramic balls 13 are evenly distributed on the left and right sides of the alignment reference plate, and their function is to establish the alignment reference plate coordinate system; the rectangular hollow bracket 7, the static level base 8, the electronic inclinometer fixing seat 10, the tensioning wire gauge conversion seat B11 and the tensioning wire gauge conversion seat C12 are connected from top to bottom by bolts, wherein A tensioning wire gauge conversion seat A6 is bolted above the rectangular hollow bracket 7, and three 0.25-inch ceramic balls 14 are evenly distributed on each conversion seat or base, and their function is to establish their own sensor coordinate systems respectively, and to link them with the alignment reference plate coordinate system to complete the coordinate system conversion; tensioning wire gauge A1, tensioning wire gauge B4, and tensioning wire gauge C5 are bolted above the tensioning wire gauge conversion seat A6, tensioning wire gauge conversion seat B11, and tensioning wire gauge conversion seat C12, respectively, and their function is to complete radial position monitoring; a static level 2 is bolted above the static level base 8, and its function is to complete vertical position monitoring; an electronic inclinometer base 9 and an electronic inclinometer 3 are bolted above the electronic inclinometer fixing seat 10, and their function is to complete the position monitoring of the tilt angle.

[0020] like Figure 2 As shown, the alignment reference plate is made of indium steel, with a length of about 400 mm, a width of about 300 mm, and a thickness of about 30 mm. Eight 1.5-inch ceramic balls 13 are installed on both sides of the reference plate, evenly distributed on both sides of the upper surface, and five sensors, namely, the tensioning wire gauge A1, the static level gauge 2, the electronic inclinometer 3, the tensioning wire gauge B4, and the tensioning wire gauge C5, are distributed in sequence from top to bottom in the middle of the reference plate.

[0021] Tension line meters A1, B4 and C5 measure the values ​​of the tension line position in radial vertical and horizontal directions, with an absolute accuracy of approximately ±7 microns in both directions; the static level 2 measures the relative position changes of multiple points in radial and vertical directions, with a measurement resolution of 1 micron and a measurement repeatability of 5 microns (accuracy); the electronic inclinometer 3 is a dual-axis tilt sensor with an angular resolution of 0.2″ (1μrad) and an accuracy of ±1.3″ (±0.006mm / m) in two mutually perpendicular directions on the plane.

[0022] like Figure 3As shown, there are three 0.25-inch ceramic balls 14 on the tensioning line meter conversion seat A6, the tensioning line meter conversion seat B11, and the tensioning line meter conversion seat C12, with a roundness of ≤0.3 microns and a roughness of ≥0.5 microns. The three ceramic balls adopt point, line, and surface positioning modes, namely, line positioning ceramic ball 15, point positioning ceramic ball 16, and surface positioning ceramic ball 17.

[0023] like Figure 4 As shown, each 0.25-inch ceramic ball 14 and the tensioning line meter conversion seat A6, the tensioning line meter conversion seat B11, and the tensioning line meter conversion seat C12 all adopt a V-shaped interface mode, and each 0.25-inch ceramic ball 14 is exposed about 2 / 3 of the panel.

[0024] There are 15 0.25-inch ceramic balls 14 and 8 1.5-inch ceramic balls 13 on the entire reference plate. Before the particle accelerator alignment measurement, the reference plate is first placed on a three-coordinate measuring machine, and the center coordinates P of the 15 0.25-inch ceramic balls 14 are measured in sequence. i (X 0i ,Y 0i ,Z 0i ) and the center coordinates P of the eight 1.5-inch ceramic balls 13 j (X j ,Y j ,Z j ), where i=1, 2,…, 15, j=1, 2,…, 8.

[0025] Furthermore, each set of line positioning ceramic balls 15, point positioning ceramic balls 16, and surface positioning ceramic balls 17 can strictly establish a coordinate system of the sensor. Selecting a sensor coordinate system, a number of 1.5-inch ceramic balls 13 can establish the overall coordinate system of the reference plate, and the coordinate systems of each sensor can be normalized to the overall coordinate system of the reference plate through coordinate conversion.

[0026] The tension wire instrument is a common device in deformation monitoring. It uses tension (100N) to establish a physical reference line. It is mostly made of nylon or alloy. The tension wire passes through the measurement window of the tension wire instrument. The two-dimensional CCD is used to obtain the image of the tension wire on two CCD image planes. Then, through image processing technology, the position value of the tension wire in the horizontal and vertical planes is extracted in real time. In addition, through long-term continuous and uninterrupted position measurement, the deformation monitoring of the measured object is realized.

[0027] The present invention uses the line positioning ceramic ball 15, point positioning ceramic ball 16, and surface positioning ceramic ball 17 under the tensioning line instrument to establish the coordinate relationship between the two CCD image plane coordinate system benchmarks of the tensioning line instrument and the 0.25-inch ceramic ball 14, and then further obtains the position of the tensioning line in the two CCD image plane coordinate systems to establish the position relationship between the tensioning line and the 0.25-inch ceramic ball 14. Then we can apply the alignment reference plate to the installation and debugging of the particle accelerator magnet.

[0028] In the pre-alignment stage of the particle accelerator magnet, the position center of the magnet needs to be measured, so the measurement needs to be completed by the tensioning wire on the tensioning wire meter A1. After the pre-alignment stage is completed, how to specifically reflect the position center of the magnet and have strong repeatability in the subsequent formal installation stage, at this time, the alignment reference plate of the present application can be used for reverse deduction. First, the magnet position data on the tensioning wire meter A1 is converted to the tensioning wire meter B4 and the tensioning wire meter C5 through the corresponding coordinate system conversion calculation formula, and then we remove the tensioning wire on the tensioning wire meter A1 and the pre-aligned accelerator magnet. Because at this time it is equivalent to recording the magnet position data of the pre-alignment stage through the tensioning wire meter B4 and the tensioning wire meter C5. Then when entering the real installation and debugging stage, when the formal particle accelerator magnet is placed, the position data of the tensioning wire meter B4 or the tensioning wire meter C5 can be reversed to the tensioning wire meter A1. Among them, the static level 2 plays a role in the vertical position verification, and the electronic inclinometer 3 plays a role in the position verification at the inclination angle. The present invention can perform real-time conversion and verification of the relative positions of machine components during installation and debugging of a particle accelerator, and also integrates the data of various sensors and converts them into a unified coordinate system for analysis, which will greatly improve the repeatability and work efficiency of particle accelerator magnet installation.

Claims

1. A multi-sensor based alignment reference plate, characterized in that: The invention comprises a tensioning line instrument A (1), a static level (2), an electronic inclinometer (3), a tensioning line instrument B (4), a tensioning line instrument C (5), a tensioning line instrument conversion seat A (6), a rectangular hollow bracket (7), a static level base (8), an electronic inclinometer base (9), an electronic inclinometer fixing seat (10), a tensioning line instrument conversion seat B (11), a tensioning line instrument conversion seat C (12), a 1.5-inch ceramic ball (13) and a 0.25-inch ceramic ball (14); wherein eight 1.5-inch ceramic balls (13) are evenly arranged on the left and right sides of the alignment reference plate, and their function is to establish the alignment reference plate coordinate system; the rectangular hollow bracket (7), the static level base (8), the electronic inclinometer fixing seat (10), the tensioning line instrument conversion seat B (11) and the tensioning line instrument conversion seat C (12) are connected from top to bottom by bolts, wherein the rectangular hollow bracket A tensioning line instrument conversion seat A (6) is connected to the frame (7) by bolts. Three 0.25-inch ceramic balls (14) are evenly distributed on each conversion seat or base. The function of the balls is to establish respective sensor coordinate systems and link them with the alignment reference plate coordinate system to complete coordinate system conversion. Tensioning line instrument conversion seat A (6), tensioning line instrument conversion seat B (11) and tensioning line instrument conversion seat C (12) are connected to tensioning line instruments A (1), tensioning line instruments B (4) and tensioning line instruments C (5) by bolts. The function of the balls is to complete radial position monitoring. A static level (2) is connected to the static level base (8) by bolts. The function of the static level (2) is completed in the vertical direction. An electronic inclinometer base (9) and an electronic inclinometer (3) are connected to the electronic inclinometer fixing seat (10) by bolts. The function of the electronic inclinometer fixing seat (10) is completed in the tilt angle position monitoring.

2. The multi-sensor based alignment reference plate according to claim 1, characterized in that: The reference plate is made of indium steel with a length of 400 mm, a width of 300 mm and a thickness of 30 mm. Eight 1.5-inch ceramic balls (13) are installed on both sides of the reference plate, evenly distributed on both sides of the upper surface. Five sensors, namely, a tensioning wire gauge A (1), a static level (2), an electronic inclinometer (3), a tensioning wire gauge B (4) and a tensioning wire gauge C (5), are distributed in sequence from top to bottom in the middle of the reference plate.

3. The multi-sensor based alignment reference plate according to claim 1, characterized in that: The alignment reference plate converts the coordinate positions monitored by the tensioning wire gauge A (1), the static level gauge (2), the electronic inclinometer (3), the tensioning wire gauge B (4), and the tensioning wire gauge C (5) into the coordinate system on the alignment reference plate through corresponding calculations, and takes the coordinate system of the alignment reference plate as a reference as a unified coordinate system, thereby more accurately obtaining the relative position change of the object device in the unified coordinate system.

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