CN114858063B - Ball center distance measuring device with self-initializing function and using method thereof - Google Patents
Ball center distance measuring device with self-initializing function and using method thereof Download PDFInfo
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- CN114858063B CN114858063B CN202210681388.0A CN202210681388A CN114858063B CN 114858063 B CN114858063 B CN 114858063B CN 202210681388 A CN202210681388 A CN 202210681388A CN 114858063 B CN114858063 B CN 114858063B
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- 238000005259 measurement Methods 0.000 claims abstract description 20
- 241000288673 Chiroptera Species 0.000 claims abstract description 8
- 238000005188 flotation Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000004556 laser interferometry Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
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- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
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Classifications
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/045—Correction of measurements
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a ball baseball center distance measuring device with a self-initializing function and a using method thereof, and the method is a novel and effective method for tracing the standard value of a ball bat. The invention solves the technical problem that the prior device can not realize high-precision measurement of ball baseball center distance, adopts a laser interferometry ranging method and utilizes the principle of measuring relative displacement by a laser interferometer to construct a set of special ball bat center distance measuring device based on a one-dimensional air floatation guide rail and a double sliding platform, and the device does not need to use a calibrated ball bat for initialization, but uses two non-calibrated ball bats for initialization. The invention is beneficial to popularization and use of the bat in China and improves the magnitude traceability level in the related precision measurement field in China.
Description
Technical Field
The invention relates to the technical field of geometric measurement, in particular to a ball center distance measuring device with a self-initializing function and a using method thereof.
Background
The club is a length standard device with special structure, which is composed of two high-precision balls and a rod piece with low expansion coefficient, wherein the two balls are fixed at two ends of the rod piece, and the standard distance provided by the club is the center distance between the two balls. The ball bat is widely applied to a one-dimensional standard device of a coordinate measuring machine internationally, and is also an effective tool for calibrating the precision of a machine tool. The bat is used as a special length standard device and is widely used abroad, but the bat is just started due to the calibration of space coordinate measurement in China, and a set of very reliable and stable bat detection device does not exist. It is necessary to build a special calibration device for the cue stick etalon.
The length calibration of the ball rod can adopt a high-precision coordinate measuring machine or a special calibration device. The measurement precision of the coordinate measuring machine with the highest precision at present is (0.3+L/1000) mu m, and the measurement range is smaller, so that the calibration requirement of a high-precision long club cannot be met; in the aspect of special instrument development, from publicly published documents, there are mainly two special two-coordinate measuring machines developed by China national institute of metrology, and two special length measuring machines respectively developed by American national institute of standards and technology and university of florida and university of Cramersn. The prior art has the following defects:
the special two-coordinate measuring machine developed by China scientific institute for metering needs manual aiming, and the measuring precision depends on the skill of operators; the special length measuring machine developed by the national institute of standards and technology and the university of florida can only be used for calibrating the club with the length within 1 meter; special length measuring machines of the national institute of standards and technology and university of claimen can be used for calibrating clubs with a length within 3 meters, but the installation and adjustment of the instrument are very difficult, abbe errors exist, and the practical use of the national institute of standards and technology is not seen at present.
The current bat is not popular in China, on one hand, because the bat is not formally listed in a length measurement standard in a calibration standard, and on the other hand, the problem of high-precision magnitude tracing of the bat is not solved in China. Therefore, the technical problem to be solved by the invention is to establish a set of universal reliable and stable contact interferometry ball baseball center distance calibration method and detection device, which can realize high-precision measurement and calibration of ball baseball center distance and improve the precise measurement and the magnitude tracing level of space coordinates in China.
Disclosure of Invention
The invention aims to make up the defects of the prior art, and provides a ball center distance measuring device with a self-initializing function and a using method thereof, so as to solve the problems of difficult assembly and adjustment and limited calibration range of a ball bat calibration device in the prior art.
The invention is realized by the following technical scheme:
a fixed workbench is arranged on a one-dimensional granite air-float guide rail, a laser interferometer is placed on the workbench, two aluminum alloy air-float sliding frames are arranged on the air-float guide rail through air-float bearings, a plurality of fine adjustment platforms and precise ball supporting seats are arranged on the two air-float sliding frames, two bats are placed on different precise ball supporting seats for initialization length measurement, then a bat to be measured is placed on the precise ball supporting seats, and the characteristic of initialization measurement can be achieved by the laser interferometer to measure the ball center distance of the bat. The shortest distance that this equipment can measure ball baseball heart distance is 200mm, and the biggest measuring range depends on the length of one-dimensional air supporting guide rail. The measurement range of this protocol is 200mm-2000mm.
A ball center distance measuring device with self-initializing function comprises an air floatation guide rail, wherein a laser interferometer adjusting cradle head is fixedly arranged at the left end position of the air floatation guide rail, a laser interferometer is arranged on the laser interferometer adjusting cradle head, a y-axis fine tuning platform is arranged at the position, close to the laser interferometer, of the air floatation guide rail through a stud, a spectroscope and an interference mirror group are arranged on the y-axis fine tuning platform, a supporting table is fixedly arranged at the right end position of the air floatation guide rail, a first air floatation sliding frame and a second air floatation sliding frame are sequentially arranged between the y-axis fine tuning platform and the supporting table at the right end of the air floatation guide rail, two fine tuning platforms are arranged on the first air floatation sliding frame, a first y-z two-degree fine tuning platform and a second y-z two-degree fine tuning platform are sequentially arranged from left to right, the first three-ball motion base is arranged on the first y-z two-degree-of-freedom fine tuning platform, the second three-ball motion base is arranged on the second y-z two-degree-of-freedom fine tuning platform, the third y-z two-degree-of-freedom fine tuning platform, the fourth y-z two-degree-of-freedom fine tuning platform and the fifth y-z two-degree-of-freedom fine tuning platform are arranged from left to right, the third three-ball motion base is arranged on the third y-z two-degree-of-freedom fine tuning platform, the fourth three-ball motion base is arranged on the fourth y-z two-degree-of-freedom fine tuning platform, the fifth three-ball motion base is arranged on the fifth y-z two-degree-of-freedom fine tuning platform, the sixth y-z two-degree-of-freedom fine tuning platform is fixed on a supporting table at the right end of an air floatation guide rail, and the sixth three-ball motion base is arranged on the sixth y-z two-degree-of-freedom fine tuning platform.
The measurement device does not require initializing with a calibrated bat, but with two uncalibrated bats, a process known as self-initialization, which refers to offsetting the displacement of the instrument through the measurement system to a known initial value without using an external calibration workpiece.
The Abbe error theoretical value of the measuring device is zero, and the Abbe error can be eliminated by adjusting the laser interferometer to adjust the cradle head so that the laser beam emitted by the laser interferometer is parallel to the guide surface and coincides with the axis of the club to be measured.
The two aluminum alloy air-float sliding frames are supported on the air-float guide rail through a plurality of air-float bearings, the first air-float sliding frames and the second air-float sliding frames move freely on the whole air-float guide rail, only two ends of the whole air-float guide rail are provided with fixed platforms, no other obstruction is in the middle of the whole air-float guide rail, and the measuring range of the ball bat to be measured is enlarged.
The air floatation guide rail is designed in a dovetail shape, and when the center distance of a ball to be measured is measured, the sliding of the ball bat and the sliding rack is driven close to the center of gravity, so that the crawling phenomenon is reduced, and the measurement accuracy is improved.
The beam splitter and the interference lens group are adjusted to be along the position of the z direction and the angle around the z direction by the lens group mounting frame, the position of the y-axis fine adjustment platform along the y direction is finely adjusted, the first y-z two-degree-of-freedom fine adjustment platform, the second y-z two-degree-of-freedom fine adjustment platform, the third y-z two-degree-of-freedom fine adjustment platform, the fourth y-z two-degree-of-freedom fine adjustment platform, the fifth y-z two-degree-of-freedom fine adjustment platform and the sixth y-z two-degree-of-freedom fine adjustment platform are finely adjusted, and one path of laser is reflected by a target ball of the laser tracker and then interferes with the other path of laser after the laser beam emitted by the laser interferometer is split by the beam splitter.
Two y-z two-degree-of-freedom fine tuning platforms are arranged on the first air floatation sliding frame, three y-z two-degree-of-freedom fine tuning platforms are arranged on the second air floatation sliding frame, and the air floatation guide rail is arranged on the guide rail support through vibration isolation support.
The use method of the club center distance measuring device with the self-initializing function comprises a leveling process and a measuring process.
The leveling process specifically comprises the following steps:
(1) The beam splitter is arranged on a y-axis fine adjustment platform, a target ball of a laser tracker is placed on a first three-ball motion base of a first air floatation carriage, the first air floatation carriage is moved to be close to the left side of an air floatation guide rail, a fine adjustment knob of the laser interferometer and the first three-ball motion base are adjusted to be respectively leveled, so that a receiving signal lamp of the laser interferometer is fully bright, the first air floatation carriage is moved to be close to the right side of the air floatation guide rail, the fine adjustment knob of the laser interferometer and the first three-ball motion base are adjusted, so that the receiving signal lamp of the laser interferometer is fully bright, and the operations are repeated for several times until the first air floatation carriage moves at any position on the air floatation guide rail, and the receiving signal lamp of the laser interferometer is fully bright;
(2) Placing a target ball of a laser tracker on a second three-ball motion base of a first air floatation carriage, moving the first air floatation carriage to be close to the left side of an air floatation guide rail, adjusting a fine tuning knob of the laser interferometer and a fine tuning platform with two degrees of freedom of a second y-z to level the laser interferometer and the second three-ball motion base respectively, enabling a receiving signal lamp of the laser interferometer to be fully bright, moving the first air floatation carriage to be close to the right side of the air floatation guide rail, adjusting the fine tuning knob of the laser interferometer and the fine tuning platform with two degrees of freedom of the second y-z to level the laser interferometer and the second three-ball motion base respectively, enabling the receiving signal lamp of the laser interferometer to be fully bright, and repeating the operation for several times until the receiving signal lamp of the laser interferometer is fully bright when the first air floatation carriage moves at any position on the air floatation guide rail;
(3) Placing a target ball of a laser tracker on a third ball motion base of a second air floatation carriage, moving the second air floatation carriage to be close to the left side of an air floatation guide rail, adjusting a fine tuning knob of the laser interferometer and a fine tuning platform with two degrees of freedom of a third y-z to respectively level two points of the laser interferometer and the third ball motion base so that a receiving signal lamp of the laser interferometer is fully bright, moving the second air floatation carriage to be close to the right side of the air floatation guide rail, adjusting the fine tuning knob of the laser interferometer and the fine tuning platform with two degrees of freedom of the third y-z to respectively level the laser interferometer and the third ball motion base so that the receiving signal lamp of the laser interferometer is fully bright, and repeating the operation for several times until the receiving signal lamp of the laser interferometer is fully bright when the second air floatation carriage moves at any position on the air floatation guide rail;
(4) Placing a target ball of a laser tracker on a fourth three-ball motion base of a second air floatation carriage, moving the second air floatation carriage to be close to the left side of an air floatation guide rail, adjusting a fine tuning knob of the laser interferometer and a fine tuning platform with two degrees of freedom of a fourth y-z to respectively level two points of the laser interferometer and the fourth three-ball motion base so that a receiving signal lamp of the laser interferometer is fully bright, moving the second air floatation carriage to be close to the right side of the air floatation guide rail, adjusting the fine tuning knob of the laser interferometer and the fine tuning platform with two degrees of freedom of the fourth y-z to respectively level the laser interferometer and the fourth three-ball motion base so that the receiving signal lamp of the laser interferometer is fully bright, and repeating the operation for several times until the second air floatation carriage moves at any position on the air floatation guide rail;
(5) And placing the target ball of the laser tracker on a sixth three-ball motion base, and adjusting a y-axis fine adjustment platform and a sixth y-z two-degree-of-freedom fine adjustment platform to enable the centers of the laser tracker, the spectroscope and the target ball to coincide, wherein the laser beam emitted by the laser interferometer coincides with the axes of the balls on the spectroscope, the first three-ball motion base, the second three-ball motion base, the third three-ball motion base, the fourth three-ball motion base and the sixth three-ball motion base.
The measuring process specifically comprises the following steps:
(1) Placing a target ball of a laser tracker on a first three-ball motion base of a first air floatation carriage, respectively placing two ends of a first ball bat on a second three-ball motion base and a fourth three-ball motion base, respectively placing two ends of the second ball bat on a fifth three-ball motion base and a sixth three-ball motion base, standing, and setting the reading of the laser interferometer to be zero after the system is stable;
(2) Taking down the second bat, moving one end of the first bat from the fourth three-ball motion base to the sixth three-ball motion base, standing for stable system, and recording the reading value of the laser interferometerL 0 The value is the sum of the center distance of the second ball baseball and the distances between the fourth ball sports base and the fifth ball sports base;
(3) Placing a target ball on a first air flotation sliding frame on a third ball motion base of a second air flotation sliding frame, simultaneously sliding the first air flotation sliding frame to the left of a guide rail so as not to collide or interfere with the second air flotation sliding frame, placing the left end of a second ball bat on a fourth ball motion base, placing the right end of the second ball bat on a sixth ball motion base, standing until a system is stable, and setting the reading of a laser interferometer to be zero;
(4) Placing the left end of the club to be tested on a fourth three-ball motion base on the second air floatation sliding frame, placing the right end of the club to be tested on a sixth three-ball motion base, standing for stable system, and recording the numerical value of the laser interferometerXLength of club to be measuredLIs the sum of the readings of the two laser interferometers, i.eL=L 0 +X。
In the leveling process and the measuring process, the ball bodies at the end parts of the ball rods placed on the first ball motion base, the second ball motion base, the third ball motion base, the fourth ball motion base, the fifth ball motion base and the sixth ball motion base respectively use the same ball body or the ball bodies with the same nominal value.
The invention has the advantages that: (1) The invention solves the problem of limited measurement length range, and theoretically, the device can measure any length of the bat;
(2) The invention realizes self-initialization by using two bats, solves the problem of difficult manufacturing of three bats, and eliminates Abbe error;
(3) The invention eliminates the adverse effect of lateral force on measurement accuracy when the ball arm pushes the sliding frame to move.
Drawings
FIG. 1 is a front view of an assembly of the device of the present invention;
FIG. 2 is a top plan view of an assembly of the apparatus of the present invention;
fig. 3 is a schematic diagram of the principle of measuring the ball center distance of a ball bat by using a laser interferometer according to the present invention (fig. 3 (a) is a schematic diagram of a step (1) of measuring the ball center distance of a ball bat, fig. 3 (b) is a schematic diagram of a step (2) of measuring the ball center distance of a ball bat, fig. 3 (c) is a schematic diagram of a step (3) of measuring the ball center distance of a ball bat, and fig. 3 (d) is a schematic diagram of a step (4) of measuring the ball center distance of a ball bat).
Reference numerals in the drawings: XL-80 laser interferometer 1, laser interferometer 2, y-axis fine tuning stage 3, first three-ball motion base 4, first y-z two-degree-of-freedom fine tuning stage 5, second three-ball motion base 6, second y-z two-degree-of-freedom fine tuning stage 7, first air bearing carriage 8, air bearing rail 9, third three-ball motion base 10, third y-z two-degree-of-freedom fine tuning stage 11, fourth three-ball motion base 12, fourth y-z two-degree-of-freedom fine tuning stage 13, fifth three-ball motion base 14, fifth y-z two-degree-of-freedom fine tuning stage 15, second air bearing carriage 16, sixth three-ball motion base 17, and sixth y-z two-degree-of-freedom fine tuning stage 18.
Description of the embodiments
As shown in fig. 1 and 2, the basic structure of the present invention is described only schematically, and therefore, only the constitution and design schematic relating to the present invention are shown.
The one-dimensional measurement device with the ball center distance of the ball bat and the use method thereof comprise the following steps: XL-80 laser interferometer 1, laser interferometer 2, y-axis fine tuning platform 3, first three-ball motion base 4, first y-z two degree of freedom fine tuning platform 5, second three-ball motion base 6, second y-z two degree of freedom fine tuning platform 7, first air supporting carriage 8, air supporting guide 9, third three-ball motion base 10, third y-z two degree of freedom fine tuning platform 11, fourth three-ball motion base 12, fourth y-z two degree of freedom fine tuning platform 13, fifth three-ball motion base 14, fifth y-z two degree of freedom fine tuning platform 15, second air supporting carriage 16, sixth three-ball motion base 17, sixth y-z two degree of freedom fine tuning platform 18, laser interferometer 1 is fixed on the laser interferometer adjustment cloud platform of air supporting guide 9 leftmost end, laser beam of light that laser interferometer 1 sent is interfered through interferometer 2, adjust laser interferometer 1 button and make this beam and air supporting guide 9 plane on the first y-z two degree of freedom fine tuning platform 15, second three-ball motion platform 17 is placed on the first three-z two degree of freedom fine tuning platform 5 and second three-ball motion platform 7 on the second three-z two degree of freedom fine tuning platform 5. The second air floatation carriage 16 is provided with a third y-z two-degree-of-freedom fine tuning platform 11, a fourth y-z two-degree-of-freedom fine tuning platform 13 and a fifth y-z two-degree-of-freedom fine tuning platform 15, wherein a third three-ball motion base 10 is arranged on the third y-z two-degree-of-freedom fine tuning platform 11, a fourth three-ball motion base 12 is arranged on the fourth y-z two-degree-of-freedom fine tuning platform 13, and a fifth three-ball motion base 14 is arranged on the fifth y-z two-degree-of-freedom fine tuning platform 15. A support table is fixed at the rightmost end of the air-float guide rail 9, a sixth y-z two-degree-of-freedom fine tuning platform 18 is arranged on the support table, a sixth three-ball motion base 17 is arranged on the sixth y-z two-degree-of-freedom fine tuning platform 18, a first ball bat is arranged on the second three-ball motion base 6 and the fourth three-ball motion base 12, and a second ball bat is arranged on the fifth three-ball motion base 14 and the sixth three-ball motion base 17.
The technical effects of the present embodiment are: after the self-initialization length measurement is performed by using the first bat and the second bat, one end of the bat to be measured is placed on the sixth three-ball motion base 17, the other end of the bat to be measured is placed on the fourth three-ball motion base 12, and the positions of the second air-float sliding frame 16 are different according to the lengths of the bats to be measured, so that the calibration of the ball center distances of bats with different lengths is realized.
The leveling process specifically comprises the following steps:
(1) The beam splitter is arranged on a y-axis fine adjustment platform 3, a target ball of a laser tracker is placed on a first three-ball motion base 4 of a first air bearing carriage 8, the first air bearing carriage 8 is moved to be close to the left side of an air bearing guide rail 9, a fine adjustment knob of the laser interferometer 1 and the first y-z two-degree-of-freedom fine adjustment platform 5 are adjusted to level the laser interferometer 1 and the first three-ball motion base 4 respectively, so that a receiving signal lamp of the laser interferometer 1 is fully bright, the first air bearing carriage 8 is moved to be close to the right side of the air bearing guide rail 9, the fine adjustment knob of the laser interferometer 1 and the first y-z two-degree-of-freedom fine adjustment platform 5 are adjusted to level the laser interferometer 1 and the first three-ball motion base 4 respectively, so that the receiving signal lamp of the laser interferometer 1 is fully bright, and the operation is repeated for several times until the first air bearing carriage 8 moves at any position on the air bearing guide rail 9, and the receiving signal lamp of the laser interferometer 1 is fully bright;
(2) Placing a target ball of a laser tracker on a second three-ball motion base 6 of a first air bearing carriage 8, moving the first air bearing carriage 8 to be close to the left side of an air bearing guide rail 9, adjusting a fine tuning knob of the laser interferometer 1 and a fine tuning platform 7 with two degrees of freedom of a second y-z to level the laser interferometer 1 and the second three-ball motion base 6 respectively, enabling a receiving signal lamp of the laser interferometer 1 to be fully on, moving the first air bearing carriage 8 to be close to the right side of the air bearing guide rail 9, adjusting the fine tuning knob of the laser interferometer 1 and the fine tuning platform 7 with two degrees of freedom of the second y-z to level the laser interferometer 1 and the second three-ball motion base 6 respectively, enabling the receiving signal lamp of the laser interferometer 1 to be fully on, and repeating the operations for several times until the receiving signal lamp of the laser interferometer 1 is fully on when the first air bearing carriage 8 moves at any position on the air bearing guide rail 9;
(3) Placing a target ball of a laser tracker on a third ball motion base 10 of a second air floatation carriage 16, moving the second air floatation carriage 16 to be close to the left side of an air floatation guide rail 9, adjusting a fine tuning knob of the laser interferometer 1 and a fine tuning platform 11 with two degrees of freedom of a third y-z to respectively level two points of the laser interferometer 1 and the third ball motion base 10 so that a receiving signal lamp of the laser interferometer 1 is fully lightened, then moving the second air floatation carriage 16 to be close to the right side of the air floatation guide rail 9, adjusting the fine tuning knob of the laser interferometer 1 and the fine tuning platform 11 with two degrees of freedom of the third y-z to respectively level the laser interferometer 1 and the third ball motion base 10 so that the receiving signal lamp of the laser interferometer 1 is fully lightened, and repeating the operations for several times until the receiving signal lamp of the laser interferometer 1 is fully lightened when the second air floatation carriage 16 moves at any position on the air floatation guide rail 9;
(4) Placing a target ball of a laser tracker on a fourth three-ball motion base 12 of a second air floatation carriage 16, moving the second air floatation carriage 16 to be close to the left side of an air floatation guide rail 9, adjusting a fine tuning knob of the laser interferometer 1 and a fine tuning platform 13 with two degrees of freedom of a fourth y-z to respectively level two points of the laser interferometer 1 and the fourth three-ball motion base 12 so that a receiving signal lamp of the laser interferometer 1 is fully lightened, then moving the second air floatation carriage 16 to be close to the right side of the air floatation guide rail 9, adjusting the fine tuning knob of the laser interferometer 1 and the fine tuning platform 13 with two degrees of freedom of the fourth y-z to respectively level the laser interferometer 1 and the fourth three-ball motion base 12 so that the receiving signal lamp of the laser interferometer 1 is fully lightened, and repeating the operations for several times until the second air floatation carriage 16 moves on any position on the air floatation guide rail 9 and the receiving signal lamp of the laser interferometer 1 is fully lightened;
(5) The target ball of the laser tracker is placed on a sixth three-ball motion base 17, and the y-axis fine adjustment platform 3 and the sixth y-z two-degree-of-freedom fine adjustment platform 18 are adjusted so that the centers of the laser tracker, the spectroscope and the target ball coincide, and the laser beam emitted by the laser interferometer 1 coincides with the axes of the balls on the spectroscope, the first three-ball motion base, the second three-ball motion base, the third three-ball motion base, the fourth three-ball motion base and the sixth three-ball motion base.
The measuring process specifically comprises the following steps:
step one, referring to fig. 3 (a), fig. 3 is a schematic diagram of the principle of the invention for measuring the pitch of a baseball. Placing a laser tracker target ball on a first three-ball motion base 4 of a first air floatation carriage 8, placing a first ball bat 19 on a second three-ball motion base 6 and a fourth three-ball motion base 12, placing a second ball bat 20 on a fifth three-ball motion base 14 and a sixth three-ball motion base 17, standing for system stability, and setting the reading of the laser interferometer to zero;
step two, referring to fig. 3 (b), fig. 3 is a schematic diagram of the principle of the invention for measuring the pitch of baseball. Taking out the second bat 20, moving the right end ball of the first bat 19 from the fourth three-ball motion base 12 to the sixth three-ball motion base 17, standing for system stability, and reading the reading value of the laser interferometer, namely the sum of the distances between the second bat and the fourth and fifth three-ball motion bases, and recording asL 0 ；
Step three, referring to fig. 3 (c), fig. 3 is a schematic diagram of the principle of measuring the pitch of a baseball according to the present invention. Taking down the target ball on the first air floatation carriage 8, placing the target ball on the third ball motion base 10 of the second air floatation carriage 16, placing the left end of the second ball bat 20 on the fourth ball motion base 12, placing the right end of the second ball bat on the sixth ball motion base 17, moving the first air floatation carriage 8 to the leftmost side of the air floatation guide rail 9, standing, and setting the reading of the laser interferometer to be zero after the system is stable;
step four, see figure 3(d) Fig. 3 is a schematic diagram of the principle of the invention for measuring the pitch of a baseball. The left end of the club 21 to be measured is placed on the fourth three-ball motion base 12 on the second air-floating sliding frame 16, the right end is placed on the sixth three-ball motion base 17, after the rest is carried out and the system is stable, the numerical value of the laser interferometer is read, and the numerical value is recorded asX. If the length of the club to be measured isLThe length of the ball bat to be tested is:L=L 0 +X。
Claims (1)
1. the utility model provides a club centre of sphere distance measuring device with from initialization function which characterized in that: comprises an air floatation guide rail, a laser interferometer adjusting cradle head is fixedly arranged at the left end position of the air floatation guide rail, a laser interferometer is arranged on the laser interferometer adjusting cradle head, a y-axis fine adjustment platform is arranged on the air floatation guide rail near the laser interferometer through a stud, a spectroscope and an interference mirror group are arranged on the y-axis fine adjustment platform, a supporting table is fixedly arranged at the right end position of the air floatation guide rail, a first air floatation carriage and a second air floatation carriage are sequentially arranged between the supporting tables positioned at the y-axis fine adjustment platform and the right end on the air floatation guide rail, two fine adjustment platforms are arranged on the first air floatation carriage, a first y-z two-degree-of-freedom fine adjustment platform and a second y-z two-degree-of-freedom fine adjustment platform are sequentially arranged from left to right, a first three-ball motion base is arranged on the first y-z two-degree-of-freedom fine adjustment platform, the second three-ball motion base is arranged on the second y-z two-degree-of-freedom fine tuning platform, the third three-ball motion base is arranged on the second air floatation sliding frame, the third y-z two-degree-of-freedom fine tuning platform, the fourth y-z two-degree-of-freedom fine tuning platform and the fifth y-z two-degree-of-freedom fine tuning platform are arranged from left to right, the third three-ball motion base is arranged on the third y-z two-degree-of-freedom fine tuning platform, the fourth three-ball motion base is arranged on the fourth y-z two-degree-of-freedom fine tuning platform, the fifth three-ball motion base is arranged on the fifth y-z two-degree-of-freedom fine tuning platform, the sixth y-z two-degree-of-freedom fine tuning platform is fixed on a supporting table at the right end of an air floatation guide rail, and the sixth three-ball motion base is arranged on the sixth y-z two-degree-of-freedom fine tuning platform;
two uncalibrated bats are used for self-initialization during measurement;
according to the ball center distance measuring device with the self-initializing function, the cradle head is adjusted through adjusting the laser interferometer, so that laser beams emitted by the laser interferometer are parallel to the air floatation guide surface, and the laser beams are overlapped with the axis of the ball to be measured to eliminate Abbe errors;
the first air-float carriage and the second air-float carriage are supported on the air-float guide rail through a plurality of air-float bearings, and the first air-float carriage and the second air-float carriage freely move on the whole air-float guide rail;
the air floatation guide rail is designed into a dovetail shape;
the beam splitter and the interference lens group are adjusted to be at a position along the z direction and an angle around the z direction by a lens group mounting frame, the position of the y-axis fine adjustment platform along the y direction is fine-adjusted, the first y-z two-degree-of-freedom fine adjustment platform, the second y-z two-degree-of-freedom fine adjustment platform, the third y-z two-degree-of-freedom fine adjustment platform, the fourth y-z two-degree-of-freedom fine adjustment platform, the fifth y-z two-degree-of-freedom fine adjustment platform and the sixth y-z two-degree-of-freedom fine adjustment platform are fine-adjusted, and one path of laser is reflected by a target ball of the laser tracker and then interferes with the other path of laser after the laser beam emitted by the laser interferometer is split by the beam splitter;
the using method of the ball center distance measuring device with the self-initializing function comprises a leveling process and a measuring process;
the leveling process specifically comprises the following steps:
(1) The beam splitter is arranged on a y-axis fine adjustment platform, a target ball of a laser tracker is placed on a first three-ball motion base of a first air floatation carriage, the first air floatation carriage is moved to be close to the left side of an air floatation guide rail, a fine adjustment knob of the laser interferometer and the first three-ball motion base are adjusted to be respectively leveled, so that a receiving signal lamp of the laser interferometer is fully bright, the first air floatation carriage is moved to be close to the right side of the air floatation guide rail, the fine adjustment knob of the laser interferometer and the first three-ball motion base are adjusted, so that the receiving signal lamp of the laser interferometer is fully bright, and the operations are repeated for several times until the first air floatation carriage moves at any position on the air floatation guide rail, and the receiving signal lamp of the laser interferometer is fully bright;
(2) Placing a target ball of a laser tracker on a second three-ball motion base of a first air floatation carriage, moving the first air floatation carriage to be close to the left side of an air floatation guide rail, adjusting a fine tuning knob of the laser interferometer and a fine tuning platform with two degrees of freedom of a second y-z to level the laser interferometer and the second three-ball motion base respectively, enabling a receiving signal lamp of the laser interferometer to be fully bright, moving the first air floatation carriage to be close to the right side of the air floatation guide rail, adjusting the fine tuning knob of the laser interferometer and the fine tuning platform with two degrees of freedom of the second y-z to level the laser interferometer and the second three-ball motion base respectively, enabling the receiving signal lamp of the laser interferometer to be fully bright, and repeating the operation for several times until the receiving signal lamp of the laser interferometer is fully bright when the first air floatation carriage moves at any position on the air floatation guide rail;
(3) Placing a target ball of a laser tracker on a third ball motion base of a second air floatation carriage, moving the second air floatation carriage to be close to the left side of an air floatation guide rail, adjusting a fine tuning knob of the laser interferometer and a fine tuning platform with two degrees of freedom of a third y-z to respectively level two points of the laser interferometer and the third ball motion base so that a receiving signal lamp of the laser interferometer is fully bright, moving the second air floatation carriage to be close to the right side of the air floatation guide rail, adjusting the fine tuning knob of the laser interferometer and the fine tuning platform with two degrees of freedom of the third y-z to respectively level the laser interferometer and the third ball motion base so that the receiving signal lamp of the laser interferometer is fully bright, and repeating the operation for several times until the receiving signal lamp of the laser interferometer is fully bright when the second air floatation carriage moves at any position on the air floatation guide rail;
(4) Placing a target ball of a laser tracker on a fourth three-ball motion base of a second air floatation carriage, moving the second air floatation carriage to be close to the left side of an air floatation guide rail, adjusting a fine tuning knob of the laser interferometer and a fine tuning platform with two degrees of freedom of a fourth y-z to respectively level two points of the laser interferometer and the fourth three-ball motion base so that a receiving signal lamp of the laser interferometer is fully bright, moving the second air floatation carriage to be close to the right side of the air floatation guide rail, adjusting the fine tuning knob of the laser interferometer and the fine tuning platform with two degrees of freedom of the fourth y-z to respectively level the laser interferometer and the fourth three-ball motion base so that the receiving signal lamp of the laser interferometer is fully bright, and repeating the operation for several times until the second air floatation carriage moves at any position on the air floatation guide rail;
(5) Placing a target ball of the laser tracker on a sixth three-ball motion base, adjusting a y-axis fine adjustment platform and a sixth y-z two-degree-of-freedom fine adjustment platform to enable the centers of the laser tracker, a spectroscope and the target ball to coincide, and enabling the laser beam emitted by the laser interferometer to coincide with the axes of the balls on the spectroscope, the first three-ball motion base, the second three-ball motion base, the third three-ball motion base, the fourth three-ball motion base and the sixth three-ball motion base;
the measuring process specifically comprises the following steps:
(1) Placing a target ball of a laser tracker on a first three-ball motion base of a first air floatation carriage, respectively placing two ends of a first ball bat on a second three-ball motion base and a fourth three-ball motion base, respectively placing two ends of the second ball bat on a fifth three-ball motion base and a sixth three-ball motion base, standing, and setting the reading of the laser interferometer to be zero after the system is stable;
(2) Taking down the second bat, moving one end of the first bat from the fourth three-ball motion base to the sixth three-ball motion base, standing for stable system, and recording the reading value L of the laser interferometer 0 The value is the sum of the center distance of the second ball baseball and the distances between the fourth ball sports base and the fifth ball sports base;
(3) Placing a target ball on a first air flotation sliding frame on a third ball motion base of a second air flotation sliding frame, simultaneously sliding the first air flotation sliding frame to the left of a guide rail so as not to collide or interfere with the second air flotation sliding frame, placing the left end of a second ball bat on a fourth ball motion base, placing the right end of the second ball bat on a sixth ball motion base, standing until a system is stable, and setting the reading of a laser interferometer to be zero;
(4) Placing the left end of the club to be tested on a fourth three-ball motion base on a second air-float sliding frame, placing the right end of the club to be tested on a sixth three-ball motion base, standing until the system is stable, and recording the numerical value X of the laser interferometer, wherein the length L of the club to be tested is two laser dryingsThe sum of the interferometer readings, i.e. l=l 0 +X；
In the leveling process and the measuring process, the ball bodies at the end parts of the ball rods placed on the first three-ball motion base, the second three-ball motion base, the third three-ball motion base, the fourth three-ball motion base, the fifth three-ball motion base and the sixth three-ball motion base respectively use the same ball bodies or the balls with the same nominal value.
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