CN211954030U - Large-scale accurate circular guide rail operation accuracy testing device - Google Patents
Large-scale accurate circular guide rail operation accuracy testing device Download PDFInfo
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- CN211954030U CN211954030U CN202020704894.3U CN202020704894U CN211954030U CN 211954030 U CN211954030 U CN 211954030U CN 202020704894 U CN202020704894 U CN 202020704894U CN 211954030 U CN211954030 U CN 211954030U
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Abstract
The utility model discloses a large-scale accurate ring rail operation precision detection device aims at solving the technical problem that the unable accurate centre of a circle deviation that detects the ring rail operation that exists among the prior art. The utility model discloses a mobile unit continuous movement detecting element, detecting element real-time tracking measurement reference unit and to the real-time feedback of main control computer, the main control computer is according to the coincidence light after feedback information control adjustment reference unit and the record adjustment, the best centre of a circle of the large-scale accurate ring rail operation of all coincidence light fitting according to the record again, calculate the deflection of detection light again according to the best centre of a circle, judge whether the ring rail is qualified according to the deflection, this large-scale accurate ring rail operation accuracy detection device design benefit, simple structure easily realizes, and need not artifical too much intervention. In large-scale accurate ring rail installation and debugging process, the utility model discloses can realize the adjustment while measuring on line, until satisfying the designing requirement, be convenient for raise the efficiency.
Description
Technical Field
The utility model relates to a large-scale accurate ring rail, concretely relates to large-scale accurate ring rail operation precision detection device.
Background
The diameter of the large-scale precise annular guide rail generally reaches more than 2m, and the measurement of the running track around the circle center has great significance for large-scale precise heavy-duty manufacturing and testing. For example, in various simulated attitude mechanical tests, the circle center deviation of the large precise annular guide rail running around the circle center has great influence on simulated test data, so the requirements on the simulation test data are strict. However, at present, no suitable technical method and equipment for measuring the circular center deviation of the running of the circular guide rail have been published at home and abroad.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the technical problem who can't the accurate centre of a circle deviation that detects the operation of ring rail that exists among the prior art, and provide a large-scale accurate ring rail operation precision detection device.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a large-scale accurate circular guide rail operation accuracy testing device which characterized in that: the system comprises a main control machine, a mobile unit capable of moving around an annular guide rail, a detection unit arranged on the mobile unit, and a reference unit arranged in an area near the central point of the annular guide rail;
the detection unit comprises a light source, an internal focusing optical mechanism and a CCD camera;
the light source also comprises a reticle arranged at the emergent end of the light source;
the detection light emitted by the light source is adjusted by the internal focusing optical mechanism and then emitted to the reference unit;
the reference unit comprises a four-dimensional electric control platform, a steel body target ball and a target assembly, wherein the steel body target ball and the target assembly are arranged on the four-dimensional electric control platform;
the target assembly divides the adjusted detection light into transmission light and reflection light;
the four-dimensional electric control platform is used for adjusting the posture of the steel body target ball, so that the transmitted light and the reflected light are superposed to form superposed light;
the inner focusing optical mechanism receives the superposed light and transmits the superposed light to the main control computer through the CCD camera;
and the main control computer fits the optimal circle center of the annular guide rail through the coincident light rays so as to judge and feed back whether the annular guide rail is qualified or not.
Furthermore, the target component comprises a semi-transparent semi-reflecting mirror, an inclined reflecting mirror and a plane reflecting mirror which are sequentially arranged along a light path;
the semi-transmitting and semi-reflecting mirror divides the adjusted detection light into transmission light and reflection light;
the semi-transparent semi-reflecting mirror is parallel to the inclined reflecting mirror, and an included angle between the semi-transparent semi-reflecting mirror and the inclined reflecting mirror is 45 degrees;
the optical path from the semi-transparent semi-reflecting mirror to the center of the steel target ball is equal to the optical path from the semi-transparent semi-reflecting mirror to the plane reflecting mirror.
Furthermore, the moving unit comprises a mounting plate, two first rollers for rolling along the outer side surface of the annular guide rail and a second roller for rolling along the inner side surface of the annular guide rail are arranged below the mounting plate;
the detection unit is arranged above the mounting plate.
Furthermore, a spring mounting cavity is arranged below the mounting plate, a spring is arranged in the spring mounting cavity, and a connecting rod and a screw rod are respectively arranged at two ends of the spring mounting cavity; one end of the connecting rod is in contact with one end of the spring, and the other end of the connecting rod extends out of the spring mounting cavity and is connected with a second roller through a pin shaft; one end of the screw rod is in contact with the other end of the spring, and the other end of the screw rod extends out of the spring installation cavity and is in threaded connection with the spring installation cavity.
Furthermore, a hand wheel is arranged at one end of the screw rod extending out of the spring mounting cavity;
the first roller and the second roller are both bearings.
Furthermore, the four-dimensional electric control platform comprises a two-dimensional translation table and an azimuth pitching two-dimensional rotary table arranged on the two-dimensional translation table;
the steel body target ball and the target assembly are arranged on the azimuth pitching two-dimensional turntable.
Further, the detection unit further comprises a beam splitter;
the detection light emitted by the light source is emitted to the internal focusing optical mechanism through the beam splitter.
The utility model has the advantages that:
1. the utility model discloses a mobile unit continuous movement detecting element, detecting element real-time tracking measurement reference unit and to the real-time feedback of main control computer, the main control computer is according to the coincidence light after feedback information control adjustment reference unit and the record adjustment, the best centre of a circle of the large-scale accurate ring rail operation of all coincidence light fitting according to the record again, calculate the deflection of detection light again according to the best centre of a circle, judge whether the ring rail is qualified according to the deflection, this large-scale accurate ring rail operation accuracy detection device design benefit, simple structure easily realizes, and need not artifical too much intervention.
2. The utility model discloses a large-scale accurate circular guide rail operation accuracy detection device has the characteristics of high measurement accuracy, wherein the circular guide rail operation normal direction is decided by the plane reflector self-aligning light path, can reach 1' magnitude accuracy; the spatial point passed by the running normal of the annular guide rail is determined by the self-collimating optical path of the rigid target ball and can reach the micron level; the comprehensive measurement precision is less than or equal to 0.02 mm.
3. The utility model discloses a large-scale accurate circular guide rail operation accuracy detection device has the characteristics of high measurement efficiency and on-line measurement; in large-scale accurate ring rail installation and debugging process, the utility model discloses can realize the adjustment while measuring on line, until satisfying the designing requirement, be convenient for raise the efficiency.
4. The large-scale precision annular guide rail operation precision detection device has strong adaptability; accessible screw rod and spring pretightning force adjust the distance between first gyro wheel and the second gyro wheel in real time, make it and the large-scale accurate ring rail adaptation of quilt survey, make the utility model provides a mobile unit is applicable to the ring rail of different curvature radius, different specifications.
5. The utility model discloses a large-scale accurate ring rail operation accuracy testing technique has automatic, intelligent characteristics. In whole guide rail operation process, the utility model discloses can realize whole automatic tracking, intelligent recognition, real-time tracking compensation control need not artificial intervention, has guaranteed measured data's accuracy reliable.
Drawings
Fig. 1 is a schematic structural diagram of a detection unit and a reference unit in the present invention;
fig. 2 is a schematic view of the local structure of the mobile unit with the detection unit installed on the ring rail to be detected.
1-moving unit, 11-mounting plate, 11.1-spring mounting cavity, 11.2-spring, 12-first roller, 13-second roller, 14-screw, 15-hand wheel, 16-connecting rod;
2-detection unit, 21-light source, 22-internal focusing optical mechanism, 23-CCD camera, 24-beam splitter;
3-a reference unit, 31-a four-dimensional electric control platform, 311-a two-dimensional translation table, 312-an azimuth pitching two-dimensional turntable, 32-a steel target ball, 33-a target assembly, 331-a semi-transparent semi-reflective mirror, 332-a plane mirror and 333-an inclined mirror;
4-detecting light;
5-ring-shaped guide rail.
Detailed Description
The utility model discloses a measure the centre of a circle deviation technique of large-scale accurate ring rail around centre of a circle operation, provide one kind and detect the precision height, degree of automation is high, real-time image processing and intelligent control, automatic acquisition from accurate light path place space linear equation, the best centre of a circle position's of fitting measurement technique, it is right with specific embodiment to combine below the utility model provides a large-scale accurate ring rail operation accuracy testing device does further detailed description.
The utility model relates to a large-scale accurate circular guide rail operation accuracy detection device, as shown in figure 1 and figure 2, comprising a main control computer, a mobile unit 1 capable of moving around a circular guide rail 5, a detection unit 2 arranged on the mobile unit 1, and a reference unit 3 arranged in the area near the central point of the circular guide rail 5;
the mobile unit 1 comprises a mounting plate 11, two first rollers 12 for rolling along the outer side surface of the annular guide rail 5 and a second roller 13 for rolling along the inner side surface of the annular guide rail 5 are arranged below the mounting plate 11; a spring mounting cavity 11.1 is also arranged below the mounting plate 11, a spring 11.2 is arranged in the spring mounting cavity, and a connecting rod 16 and a screw 14 are respectively arranged at two ends of the spring mounting cavity; one end of the connecting rod 16 is contacted with one end of the spring 11.2, and the other end of the connecting rod 16 extends out of the spring mounting cavity 11.1 and is connected with a second roller through a pin shaft; one end of the screw rod 14 is contacted with the other end of the spring 11.2, the other end of the screw rod 14 extends out of the spring installation cavity 11.1 and is connected with a hand wheel 15, and the screw rod 14 is in threaded connection with the spring installation cavity 11.1; in order to improve the precision, the utility model provides a first gyro wheel 12 and second gyro wheel 13 are the bearing. The moving unit 1 applies clamping force by tightly jacking the three bearings, so that the two bearings are tightly attached to the annular guide rail 5, and the central vertical lines of the two positioning bearing shafts positioned on the outer side of the annular guide rail can point to the circle center of the annular guide rail. The top-tightening bearing is combined with the screw 14 and the spring 11.2, so that the mounting space is reserved, and corresponding pre-tightening force can be provided. So, mobile unit 1 can be accurate directional, can be applicable to the ring rail 5 of different specification curvature radius, different guide rail width again, has very strong adaptability and degree of accuracy.
The detection unit 2 is arranged above the mounting plate 11; as shown in fig. 1, the detection unit 2 includes a light source 21, a beam splitter 24, an internal focusing optical mechanism 22, and a CCD camera 23; a reticle is arranged at the emergent end of the light source 21; the detection light 4 emitted by the light source 21 is emitted to the inner focusing optical mechanism 22 through the beam splitter 24; the inner focusing optical mechanism 22 emits the probe light 4 emitted from the light source 21 to the reference unit 3; the utility model provides an interior focusing optical mechanism 22 structure is the same with current centering appearance structure, interior focusing optical mechanism 22 mainly comprises interior focusing optical system, drum-type focusing mechanism, driving motor, receive the focusing instruction that special image processing and intelligent control software sent when it, driving motor just drives the cylinder by the gear and focuses, so just have according to test object initiative focusing, the homing, thereby make CCD camera formation of image clear, ensure measured data's reliability.
The reference unit 3 comprises a four-dimensional electric control platform 31, a steel body target ball 32 arranged on the four-dimensional electric control platform 31 and a target assembly 33; the four-dimensional electric control platform 31 comprises a two-dimensional translation table 311 and an azimuth pitching two-dimensional turntable 312 arranged on the two-dimensional translation table 311; the steel body target ball 32 and the target assembly 33 are arranged on the azimuth elevation two-dimensional turntable 312.
The target assembly 33 comprises a half mirror 331, a plane mirror 332 and a tilted mirror 333; the half mirror 331 is parallel to the tilted mirror 333, and the angle between the two and the plane mirror 332 is 45 degrees. The half mirror 331 divides the detection light 4 into transmission light and reflection light, the transmission light can return to the inner focusing optical mechanism 22 after being reflected by the steel target ball 32, the reflection light sequentially passes through the inclined reflector 333, the plane reflector 332, the inclined reflector 333 and the half mirror 331 and then returns to the inner focusing optical mechanism 22; the normal line of the plane mirror 332 is parallel to the probe light 4; the target component is an important component for point-oblique identification of the self-aligning optical path, and adopts a light splitting optical path design, wherein the steel body target ball 32 is used for identifying a spatial point (point coordinate) passed by the self-aligning optical path, and the plane mirror 332 is used for identifying a spatial direction (linear slope) of the self-aligning optical path.
As shown in fig. 2, the optical path from the half mirror 331 to the center of the steel target ball 32 is equal to the optical path from the half mirror 331 to the normal of the plane mirror 332; the internal focusing optical mechanism 22 sends the images of the transmitted light and the reflected light to the CCD camera 23; the CCD camera 23 collects images and transmits the images to the main control computer;
the main control machine adjusts the four-dimensional electric control platform 31 according to the image collected by the CCD camera 23, so that the transmitted light and the reflected light are coincided, the positions of all the coincident light rays are determined, the best inscribed sphere of all the coincident light rays is fitted, the sphere center of the best inscribed sphere is taken as the best circle center of the annular guide rail 5, the distance between the best circle center and all the coincident light rays is obtained and compared with an error threshold value set in the main control machine, and whether the annular guide rail 5 is qualified or not is fed back according to the comparison result.
The utility model discloses but the automatic alignment of intelligent recognition steel body target ball and plane mirror looks to image processing acquires the location coordinate, consequently, can acquire steel body target ball deflection simultaneously, with two parameters of position deviation angle, both for subsequent tracking compensation provides the data foundation, can provide the sharp some inclined parameter of collimation light path again. And finally, efficiently fitting the optimal circle center of the running annular guide rail.
The utility model relates to a large-scale accurate ring rail operation accuracy testing arrangement's detection method as follows:
step 1, placing a reference unit 3 near the center of an annular guide rail 5, and installing a mobile unit 1 on the annular guide rail 5 to be detected;
if the transmitted light passes through the steel body target ball 32, the transmitted light is reflected by the steel body target ball 32 and then returns to the internal focusing optical mechanism 22 in the original way, the transmitted light and the reflected light are overlapped, the CCD camera 23 collects images of the internal focusing optical mechanism (22) and transmits the images to the main control computer, and the main control computer records the overlapped light;
if the transmitted light does not pass through the steel body target ball 32, the reflected light is reflected by the plane reflector 332 and then returns to the inner focusing optical mechanism 22 in the original way, the CCD camera 23 collects the image of the inner focusing optical mechanism 22 and transmits the image to the main control computer, the main control computer adjusts the four-dimensional electric control platform 31 through the collected image, so that the steel body target ball (32) moves to the reflected light until the transmitted light and the reflected light coincide, and the main control computer records the coincident light;
step 5, the main control computer determines the optimal circle center of the annular guide rail 5 according to the obtained multiple coincident light rays;
5.1, determining an optimal inscribed sphere, wherein the optimal inscribed sphere needs to meet the following requirements:
a. the coincident light rays pass through the optimal inscribed sphere;
b. the optimal inscribed sphere is inscribed between at least two coincident light rays;
and, the best inscribed sphere is the sphere with the smallest radius of all spheres satisfying a and b simultaneously;
5.2, determining the center of the best inscribed ball, and taking the center of the best inscribed ball as the best circle center of the annular guide rail 5;
step 6, calculating the distance from the optimal circle center to all the coincident light rays and comparing the distance with an error threshold value set in the main control machine;
if the error is within the error threshold value, the annular guide rail is qualified;
and if the error threshold value is exceeded, the annular guide rail is unqualified.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the scope of the present invention.
Claims (7)
1. The utility model provides a large-scale accurate circular guide rail operation accuracy testing device which characterized in that: the device comprises a main control machine, a mobile unit (1) capable of moving around a ring-shaped guide rail (5), a detection unit (2) arranged on the mobile unit (1), and a reference unit (3) arranged in the area near the central point of the ring-shaped guide rail (5);
the detection unit (2) comprises a light source (21), an internal focusing optical mechanism (22) and a CCD camera (23);
the light source (21) further comprises a reticle arranged at the emergent end of the light source;
the detection light (4) emitted by the light source (21) is adjusted by the internal focusing optical mechanism (22) and then emitted to the reference unit (3);
the reference unit (3) comprises a four-dimensional electric control platform (31), a steel body target ball (32) arranged on the four-dimensional electric control platform (31) and a target assembly (33);
the target assembly (33) divides the adjusted detection light (4) into transmission light and reflection light;
the four-dimensional electronic control platform (31) is used for adjusting the posture of the steel body target ball (32) so that the transmitted light and the reflected light are overlapped to form overlapped light;
the inner focusing optical mechanism (22) receives the superposed light and transmits the superposed light to the main control machine through the CCD camera (23);
and the main control computer fits the optimal circle center of the annular guide rail (5) through the coincident light rays so as to judge and feed back whether the annular guide rail (5) is qualified or not.
2. The large-scale precision circular guide rail running precision detection device according to claim 1, characterized in that: the target component (33) comprises a semi-transparent semi-reflecting mirror (331), an inclined reflecting mirror (333) and a plane reflecting mirror (332) which are sequentially arranged along a light path;
the semi-transparent semi-reflecting mirror (331) divides the adjusted detection light (4) into transmission light and reflection light;
the semi-transparent semi-reflecting mirror (331) is parallel to the inclined reflecting mirror (333), and an included angle between the semi-transparent semi-reflecting mirror and the inclined reflecting mirror (333) and the plane reflecting mirror (332) is 45 degrees;
the optical path from the semi-transparent semi-reflecting mirror (331) to the center of the steel target ball (32) is equal to the optical path from the semi-transparent semi-reflecting mirror (331) to the plane reflecting mirror (332).
3. The large-scale precision circular guide rail running precision detection device according to claim 1 or 2, characterized in that: the moving unit (1) comprises a mounting plate (11), two first rollers (12) for rolling along the outer side surface of the annular guide rail (5) and a second roller (13) for rolling along the inner side surface of the annular guide rail (5) are arranged below the mounting plate (11);
the detection unit (2) is arranged above the mounting plate (11).
4. The large-scale precision circular guide rail operation precision detection device according to claim 3, characterized in that: a spring mounting cavity (11.1) is further arranged below the mounting plate (11), a spring (11.2) is arranged in the spring mounting cavity, and a connecting rod (16) and a screw rod (14) are respectively arranged at two ends of the spring mounting cavity; one end of the connecting rod (16) is in contact with one end of the spring (11.2), and the other end of the connecting rod (16) extends out of the spring mounting cavity (11.1) and is connected with the second roller (13) through a pin shaft; one end of the screw rod (14) is in contact with the other end of the spring (11.2), and the other end of the screw rod (14) extends out of the spring installation cavity (11.1) and is in threaded connection with the spring installation cavity (11.1).
5. The large-scale precision circular guide rail operation precision detection device according to claim 4, characterized in that: a hand wheel (15) is arranged at one end of the screw rod (14) extending out of the spring mounting cavity (11.1);
the first roller (12) and the second roller (13) are both bearings.
6. The large-scale precision circular guide rail running precision detection device according to claim 1, characterized in that: the four-dimensional electric control platform (31) comprises a two-dimensional translation table (311) and an azimuth pitching two-dimensional rotary table (312) arranged on the two-dimensional translation table (311);
the steel body target ball (32) and the target assembly (33) are arranged on the azimuth pitching two-dimensional rotary table (312).
7. The large-scale precision circular guide rail running precision detection device according to claim 1, characterized in that: the detection unit (2) further comprises a beam splitter (24);
the detection light (4) emitted by the light source (21) is emitted to the internal focusing optical mechanism (22) through the beam splitter (24).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111442724A (en) * | 2020-04-30 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | Large-scale precise annular guide rail operation precision detection device and detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111442724A (en) * | 2020-04-30 | 2020-07-24 | 中国科学院西安光学精密机械研究所 | Large-scale precise annular guide rail operation precision detection device and detection method thereof |
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