A device for detecting the symmetry of a hemispherical resonator by focusing a beam

Abstract

The present invention provides a device for detecting the symmetry of a hemispherical resonator by beam focusing, comprising a translation mechanism, a rotation mechanism, a light emitting unit, an image acquisition unit and an image processing unit, wherein the translation mechanism is used to move the hemispherical resonator, and the rotation mechanism is used to rotate the hemispherical resonator; the light emitting unit comprises a first laser generator and a second laser generator, wherein the first laser generator and the second laser generator emit a first light beam and a second light beam respectively, wherein the first light beam and the second light beam intersect at the outer surface of the hemispherical resonator, wherein the first light beam and the second light beam have different colors, wherein the first light beam irradiates the outer surface of the hemispherical resonator to form a first light spot, and the second light beam irradiates the outer surface of the hemispherical resonator to form a second light spot; the image acquisition unit is used to collect images with the first light spot and the second light spot and send them to the image processing unit; and the image processing unit is used to store and process images. The symmetry of the hemispherical resonator can be judged by the processing result of the image processing unit.

Description

Technical Field

[0001] The invention relates to the field of hemispherical resonator detection equipment, in particular to a light beam focusing device for detecting the symmetry of a hemispherical resonator. Background Art

[0002] The core component of the hemispherical gyroscope is a quartz glass hemispherical resonator. The hemispherical resonator is a hemispherical cover structure with a central support rod. The hemispherical resonator has strict symmetry requirements such as concentricity and coaxiality of the outer dimensions. The symmetry accuracy of the hemispherical resonator structure will affect the assembly and use of the hemispherical resonator and the quality of the hemispherical resonator. The hemispherical cover of the hemispherical resonator is a thin-walled glass structure. The hemispherical cover is thin and brittle, easy to deform, break, and cause vibration. The use of contact probes for detection and measurement is cumbersome, easy to bump, deform, and break. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a device for detecting the symmetry of a hemispherical resonator by focusing a light beam, which adopts a non-contact method to detect the symmetry of the hemispherical resonator.

[0004] The specific technical scheme is as follows: A device for detecting the symmetry of a hemispherical resonator by focusing a beam, comprising a motion unit and a detection device, wherein the detection device comprises a light emitting unit, an image acquisition unit and an image processing unit, wherein:

[0005] The motion unit comprises a translation mechanism and a rotation mechanism, wherein the translation mechanism is used to move the hemispherical resonator, and the rotation mechanism is used to rotate the hemispherical resonator;

[0006] The light-emitting unit comprises a first laser generator and a second laser generator mounted on a bracket, the light beam emitted by the first laser generator is a first light beam, the light beam emitted by the second laser generator is a second light beam, the first light beam and the second light beam intersect at the outer surface of the hemispherical resonator, the angle between the first light beam and the second light beam is α, the first light beam and the second light beam have different colors, the first light beam irradiates the outer surface of the hemispherical resonator to form a first light spot, and the second light beam irradiates the outer surface of the hemispherical resonator to form a second light spot;

[0007] The image acquisition unit is installed on the bracket and is located on the bisector of the angle between the first light beam and the second light beam, and is used to acquire images with the first light spot and the second light spot and send them to the image processing unit;

[0008] The image processing unit is used to store and process images, and calculate an error value according to the relative position relationship between the first light spot and the second light spot in the image and the distance between the center points of the first light spot and the second light spot to determine the symmetry of the hemispherical resonator.

[0009] Preferably, the included angle α between the first light beam and the second light beam is 30°-45°.

[0010] Preferably, the translation mechanism includes an x-axis moving mechanism and a y-axis moving mechanism, the x-axis moving mechanism is used to control the hemispherical resonator to move in the direction of the angular bisector of the angle between the first light beam and the second light beam, the y-axis moving mechanism is used to control the hemispherical resonator to move in the axial direction of the central support rod of the hemispherical resonator, and the rotation mechanism is used to control the hemispherical resonator to rotate around the axis of the central support rod of the hemispherical resonator, and the reverse extension line of the angular bisector of the angle between the first light beam and the second light beam is perpendicular to and intersects with the axis of the central support rod of the hemispherical resonator.

[0011] Preferably, the x-axis moving mechanism comprises a first linear guide, a first motor and a first transmission belt, the first motor is fixedly connected to the first linear guide, the rotating shaft of the first motor is connected to the first transmission belt through a transmission mechanism, and the first motor is used to drive the first transmission belt to move along the direction of the first linear guide;

[0012] The Y-axis moving mechanism includes a second linear guide, a second motor, a second transmission belt and a first connecting mechanism, wherein the second linear guide is slidably connected to the first linear guide, the second linear guide is fixedly connected to the first transmission belt through the first connecting mechanism, the first transmission belt is used to drive the second linear guide to slide on the first guide, the rotating shaft of the second motor is connected to the second transmission belt through the transmission mechanism, and the second motor is used to drive the second transmission belt to move along the direction of the second linear guide;

[0013] The rotating mechanism includes a second connecting mechanism, a third motor and a clamping mechanism, the second connecting mechanism is slidably connected to the second linear guide rail, the second connecting mechanism is fixedly connected to the second transmission belt, the second transmission belt is used to drive the second connecting mechanism to slide on the second linear guide rail, the third motor is installed on the second connecting mechanism, the rotating shaft of the third motor is connected to the clamping mechanism, the third motor is used to drive the clamping mechanism to rotate, and the clamping mechanism is used to clamp the hemispherical resonator.

[0014] A method for detecting the symmetry of a hemispherical resonator, using the above-mentioned device for detecting the symmetry of a hemispherical resonator by focusing a light beam, comprises the following steps:

[0015] 1) Turn on the first laser generator and the second laser generator;

[0016] 2) The hemispherical resonator is moved along the bisector of the angle between the first light beam and the second light beam by means of a translation mechanism, so that the outer surface of the hemispherical resonator is located at the intersection of the first light beam and the second light beam, and the first light spot coincides with the second light spot;

[0017] 3) The hemispherical resonator is rotated by a rotating mechanism, wherein the rotation period of the hemispherical resonator is t, and at the same time, the image acquisition unit acquires images and sends them to the image processing unit, and the acquisition interval of the image acquisition unit is t1, wherein t1<t;

[0018] 4) The image processing unit stores the images, then extracts and amplifies them one by one, and analyzes the relative position relationship between the first light spot and the second light spot to determine the symmetry of the hemispherical resonator;

[0019] 5) Move along the axis of the central support rod of the hemispherical resonator through the translation mechanism and repeat steps 2)-4) to determine the symmetry of the hemispherical resonator at different cross sections.

[0020] In step 2), t1 is 1 / 10-1 / 4 of t.

[0021] In step 4), if the first light spot in all images coincides with the second light spot, the roundness of the hemispherical resonator remains unchanged and the symmetry is good; if the first light spot in the image and the first laser generator are located on the same side of the angular bisector of the angle between the first light beam and the second light beam, the radius of the hemispherical resonator in the same straight line with the angular bisector has a large error; if the first light spot in the image and the first laser generator are located on both sides of the angular bisector of the angle between the first light beam and the second light beam, respectively, the radius of the hemispherical resonator in the same straight line with the angular bisector has a small error.

[0022] The beneficial effects of the present invention are:

[0023] The symmetry of the hemispherical surface of the hemispherical resonator can be checked without physically touching the hemispherical surface of the hemispherical resonator, thereby preventing the hemispherical surface of the hemispherical resonator from being deformed or even broken due to collisions during the detection process.

[0024] The Y-axis moving mechanism can move in the axial direction of the central supporting rod of the hemispherical resonator so as to detect the symmetry of different cross sections of the hemispherical resonator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0026] Figure 1 This is a schematic diagram of the structure of the detection device in Example 1;

[0027] Figure 2 This is a schematic diagram of the structure when the first light spot and the second light spot overlap in Example 1;

[0028] Figure 3 This is a schematic diagram of the structure of the hemispherical resonator in Example 1 where the radius is larger;

[0029] Figure 4 This is a schematic diagram of the structure of the hemispherical resonator in Example 1 where the radius is smaller;

[0030] Figure 5 is a schematic diagram of the structure of the motion unit in Example 1;

[0031] Figure 6 This is a schematic diagram of the structure when the motion unit clamps the hemispherical resonator in Example 1;

[0032] 1. a first linear guide rail, 2. a first motor, 3. a first transmission belt, 4. a second linear guide rail, 5. a second motor, 6. a second transmission belt, 7. a first connecting mechanism, 8. a second connecting mechanism, 9. a third motor, 10. a clamping mechanism, 11. a flexible pad. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example

[0035] like Figure 1 , Figure 5 , Figure 6 As shown, a device for detecting the symmetry of a hemispherical resonator by focusing a beam includes a motion unit and a detection device, wherein the detection device includes a light emitting unit, an image acquisition unit and an image processing unit. The motion unit includes a translation mechanism and a rotation mechanism, wherein the translation mechanism is used to move the hemispherical resonator and the rotation mechanism is used to rotate the hemispherical resonator.

[0036] Specifically, the translation mechanism includes an x-axis movement mechanism and a y-axis movement mechanism. The x-axis movement mechanism is used to control the hemispherical resonator to move in the direction of the bisector of the angle between the first light beam and the second light beam. The y-axis movement mechanism is used to control the hemispherical resonator to move in the direction of the axis of the central support rod of the hemispherical resonator. The rotation mechanism is used to control the hemispherical resonator to rotate around the axis of the central support rod of the hemispherical resonator.

[0037] The x-axis moving mechanism includes a first linear guide rail 1, a first motor 2 and a first transmission belt 3. The first motor 2 is fixedly connected to the first linear guide rail 1. The rotating shaft of the first motor 2 is connected to the first transmission belt 3 through a transmission mechanism. The first motor 2 is used to drive the first transmission belt 3 to move along the direction of the first linear guide rail 1.

[0038] The y-axis moving mechanism includes a second linear guide 4, a second motor 5, a second transmission belt 6 and a first connecting mechanism 7. The second linear guide 4 is perpendicular to the first linear guide 1, and the second linear guide 4 is slidably connected to the first linear guide 1. Specifically, the second linear guide 4 and the first linear guide 1 are matched through concave and convex, so that the second linear guide 4 can slide on the first linear guide 1. The second linear guide 4 is fixedly connected to the first transmission belt 3 through the first connecting mechanism 7. The first connecting mechanism is specifically a bolt and a clamping plate, which is clamped on the first transmission belt 3. The first transmission belt 3 can drive the second linear guide 4 to slide on the first linear guide 1. The rotating shaft of the second motor 5 is connected to the second transmission belt 6 through a transmission mechanism. The second motor 5 is used to drive the second transmission belt 6 to move along the direction of the second linear guide 4;

[0039] The rotating mechanism includes a second connecting mechanism 8, a third motor 9 and a clamping mechanism 10. The second connecting mechanism 8 is slidably connected to the second linear guide 4. Specifically, the second connecting mechanism 8 and the second linear guide 4 are matched through concave and convex parts, so that the second connecting mechanism 8 can slide on the second linear guide 4. The second connecting mechanism 8 is fixedly connected to the second transmission belt 6. The second transmission belt 6 is used to drive the second connecting mechanism 8 to slide on the second linear guide 4. The third motor 9 is installed on the second connecting mechanism 8. The rotating shaft of the third motor 9 is connected to the clamping mechanism 10, and the third motor 9 is used to drive the clamping mechanism 10 to rotate, and the clamping mechanism 10 is used to clamp the central support rod of the hemispherical resonator.

[0040] A flexible pad 11 is installed on the clamping mechanism 10, and the flexible pad 11 is used to protect and clamp the hemispherical resonator.

[0041] like Figure 1-3As shown, the light-emitting unit includes a first laser generator 21 and a second laser generator 22 mounted on a bracket 20, wherein the first laser generator 21 is used to emit a first light beam 211. The second laser generator 22 is used to emit a second light beam 221. The first light beam 211 and the second light beam 221 intersect at the outer surface of the hemispherical resonator. The colors of the first light beam 211 and the second light beam 221 are different. The first light beam 211 is irradiated on the outer surface of the hemispherical resonator to form a first light spot 212. The second light beam 221 is irradiated on the outer surface of the hemispherical resonator to form a second light spot 222. The angle between the first light beam 211 and the second light beam 221 is α, and the angle α in this embodiment is 30°-45°. The reverse extension line of the angular bisector of the angle between the first light beam 211 and the second light beam 221 is perpendicular to and intersects with the axis of the central support rod of the hemispherical resonator.

[0042] The image acquisition unit is mounted on the bracket 20 and is located on the bisector of the angle between the first light beam 211 and the second light beam 221 , and is used to acquire images with the first light spot 212 and the second light spot 222 and send them to the image processing unit.

[0043] The image processing unit is used to store and process images, and to determine the symmetry of the hemispherical resonator according to the relative position relationship between the first light spot 212 and the second light spot 222 in the image.

[0044] A method for detecting the symmetry of a hemispherical resonator, using the above-mentioned device for detecting the symmetry of a hemispherical resonator by focusing a light beam, comprises the following steps:

[0045] 1) Turn on the first laser generator 21 and the second laser generator 22;

[0046] 2) The hemispherical resonator is moved along the bisector of the angle between the first light beam and the second light beam by a translation mechanism, so that the outer surface of the hemispherical resonator is located at the intersection of the first light beam and the second light beam, and the first light spot coincides with the second light spot.

[0047] Specifically, the first motor 2 rotates to drive the first transmission belt 3 to move along the first guide rail 1, thereby driving the second linear guide rail 4 to slide along the first guide rail 1, thereby driving the transmission rotating mechanism to move along the first guide rail, so that the hemispherical resonator installed on the rotating mechanism moves in the direction of the angular bisector of the angle between the first light beam and the second light beam.

[0048] 3) The hemispherical resonator is rotated by the rotating mechanism, wherein the rotation period of the hemispherical resonator is t, and at the same time, the image acquisition unit acquires images and sends them to the image processing unit, and the acquisition interval of the image acquisition unit is t1, wherein t1<t. In this embodiment, t1 is 1 / 10 of t, that is, when the hemispherical resonator rotates one circle, the image acquisition unit acquires image information 10 times.

[0049] 4) The image processing unit stores the images, then extracts and amplifies them one by one, and analyzes the relative position relationship between the first light spot and the second light spot to determine the symmetry of the hemispherical resonator;

[0050] If the first light spot in all images coincides with the second light spot, the roundness of the hemispherical resonator remains unchanged and the symmetry is good; if the first light spot in the image and the first laser generator are located on the same side of the angular bisector of the angle between the first light beam and the second light beam, the radius of the hemispherical resonator at that location has an error of being too large; if the first light spot in the image and the first laser generator are located on both sides of the angular bisector of the angle between the first light beam and the second light beam, respectively, the radius of the hemispherical resonator at that location has an error of being too small.

[0051] The image processing unit detects the distance d between the first light spot and the second light spot. The radius of the circular cross section of the hemispherical resonator in the plane where the first light beam and the second light beam are located is R. The angle between the first light beam and the second light beam is α. When the first light spot and the first laser generator are located on the same side of the angular bisector of the angle between the first light beam and the second light beam, the error calculation formula is:

[0052]

[0053] When the first light spot and the first laser generator are located on both sides of the angular bisector of the angle between the first light beam and the second light beam, the error calculation formula is:

[0054]

[0055] 5) Move along the axis of the central support rod of the hemispherical resonator through the translation mechanism and repeat steps 2)-4) to determine the symmetry of the hemispherical resonator at different cross sections.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for detecting the symmetry of a hemispherical resonator by focusing a beam, characterized in that: It includes a motion unit and a detection device, wherein the detection device includes a light emitting unit, an image acquisition unit and an image processing unit, wherein: The motion unit comprises a translation mechanism and a rotation mechanism, wherein the translation mechanism is used to move the hemispherical resonator, and the rotation mechanism is used to rotate the hemispherical resonator; The translation mechanism includes an x-axis movement mechanism and a y-axis movement mechanism, wherein the x-axis movement mechanism is used to control the hemispherical resonator to move in the direction of the angular bisector of the angle between the first light beam and the second light beam, and the y-axis movement mechanism is used to control the hemispherical resonator to move in the direction of the axis of the central support rod of the hemispherical resonator. The rotation mechanism is used to control the hemispherical resonator to rotate around the axis of the central support rod of the hemispherical resonator, and the reverse extension line of the angular bisector of the angle between the first light beam and the second light beam is perpendicular to and intersects the axis of the central support rod of the hemispherical resonator. The light-emitting unit comprises a first laser generator and a second laser generator mounted on a bracket, the light beam emitted by the first laser generator is a first light beam, the light beam emitted by the second laser generator is a second light beam, the first light beam and the second light beam intersect at the outer surface of the hemispherical resonator, the angle between the first light beam and the second light beam is α, the first light beam and the second light beam have different colors, the first light beam irradiates the outer surface of the hemispherical resonator to form a first light spot, and the second light beam irradiates the outer surface of the hemispherical resonator to form a second light spot; The image acquisition unit is installed on the bracket and is located on the bisector of the angle between the first light beam and the second light beam, and is used to acquire images with the first light spot and the second light spot and send them to the image processing unit; The image processing unit is used to store and process images, and calculate an error value according to the relative position relationship between the first light spot and the second light spot in the image and the distance between the center points of the first light spot and the second light spot to determine the symmetry of the hemispherical resonator.

2. According to claim 1, a device for detecting the symmetry of a hemispherical resonator by focusing a light beam, characterized in that: An included angle α between the first light beam and the second light beam is 30°-45°.

3. The device for detecting the symmetry of a hemispherical resonator by focusing a light beam according to claim 1, characterized in that: The x-axis moving mechanism comprises a first linear guide, a first motor and a first transmission belt, wherein the first motor is fixedly connected to the first linear guide, the rotating shaft of the first motor is connected to the first transmission belt through a transmission mechanism, and the first motor is used to drive the first transmission belt to move along the direction of the first linear guide; The y-axis moving mechanism includes a second linear guide, a second motor, a second transmission belt and a first connecting mechanism, the second linear guide is slidably connected to the first linear guide, the second linear guide is fixedly connected to the first transmission belt through the first connecting mechanism, the first transmission belt is used to drive the second linear guide to slide on the first guide, the rotating shaft of the second motor is connected to the second transmission belt through the transmission mechanism, and the second motor is used to drive the second transmission belt to move along the direction of the second linear guide; The rotating mechanism includes a second connecting mechanism, a third motor and a clamping mechanism, the second connecting mechanism is slidably connected to the second linear guide rail, the second connecting mechanism is fixedly connected to the second transmission belt, the second transmission belt is used to drive the second connecting mechanism to slide on the second linear guide rail, the third motor is installed on the second connecting mechanism, the rotating shaft of the third motor is connected to the clamping mechanism, the third motor is used to drive the clamping mechanism to rotate, and the clamping mechanism is used to clamp the hemispherical resonator.

4. A method for detecting the symmetry of a hemispherical resonator, characterized in that: The device for detecting the symmetry of a hemispherical resonator by focusing a light beam as claimed in claim 1 comprises the following steps: 1) Turn on the first laser generator and the second laser generator; 2) The hemispherical resonator is moved along the bisector of the angle between the first light beam and the second light beam by means of a translation mechanism, so that the outer surface of the hemispherical resonator is located at the intersection of the first light beam and the second light beam, and the first light spot coincides with the second light spot; 3) The hemispherical resonator is rotated by a rotating mechanism, wherein the rotation period of the hemispherical resonator is t, and at the same time, the image acquisition unit acquires images and sends them to the image processing unit, and the acquisition interval of the image acquisition unit is t1, wherein t1<t; 4) The image processing unit stores the images, then extracts and amplifies them one by one, and analyzes the relative position relationship between the first light spot and the second light spot to determine the symmetry of the hemispherical resonator; 5) Move along the axis of the central support rod of the hemispherical resonator through the translation mechanism and repeat steps 2)-4) to determine the symmetry of the hemispherical resonator at different cross sections.

5. A method for detecting the symmetry of a hemispherical resonator according to claim 4, characterized in that: In step 2), t1 is 1 / 10-1 / 4 of t.

6. A method for detecting the symmetry of a hemispherical resonator according to claim 4, characterized in that: In step 4), if the first light spot in all images coincides with the second light spot, the roundness of the hemispherical resonator remains unchanged and the symmetry is good; if the first light spot in the image and the first laser generator are located on the same side of the angular bisector of the angle between the first light beam and the second light beam, the radius of the hemispherical resonator in the same straight line with the angular bisector has a large error; if the first light spot in the image and the first laser generator are located on both sides of the angular bisector of the angle between the first light beam and the second light beam, respectively, the radius of the hemispherical resonator in the same straight line with the angular bisector has a small error.

Images