阅读说明：本技术 一种基于碰撞检测的耦合面自动平行对准装置及对准方法 (Coupling surface automatic parallel alignment device and method based on collision detection ) 是由 卫炀 毛玉政 陈琳 黄钊 王少华 袁钊 王琳楠 于 2021-07-30 设计创作，主要内容包括：本发明涉及光通信、光纤传感技术领域,具体涉及一种基于碰撞检测的耦合面自动平行对准装置及对准方法；包括：X轴向调节机构(2),Y轴向调节结构(1),Z轴向调节机构(3),横方向旋转调节结构(4),竖方向旋转调节结构(5),压拉力传感器(6),第二结构夹具(7),第一结构夹具(8)及防过度碰撞装置(11)；本发明采用将第一结构与压拉力传感器固连,将第二结构旋转特定角度碰撞第一结构耦合面,利用压拉力传感器检测碰撞接触,从而控制Y轴向调节结构(1)运动,利用两次碰撞的位移差值调整旋转角度及方向。本发明有效克服人眼或图像处理对准方法带来的误差,操作简单快捷,大幅提高平行对准效率及精度。(The invention relates to the technical field of optical communication and optical fiber sensing, in particular to a coupling surface automatic parallel alignment device and an alignment method based on collision detection; the method comprises the following steps: the device comprises an X axial adjusting mechanism (2), a Y axial adjusting mechanism (1), a Z axial adjusting mechanism (3), a transverse direction rotating adjusting mechanism (4), a vertical direction rotating adjusting mechanism (5), a pressure and tension sensor (6), a second structure clamp (7), a first structure clamp (8) and an excessive collision preventing device (11); the Y-axis adjusting mechanism comprises a first structure, a second structure, a pressing and pulling force sensor, a Y-axis adjusting structure (1) and a pressure-pulling force sensor, wherein the first structure is fixedly connected with the pressing and pulling force sensor, the second structure rotates for a specific angle to collide with a coupling surface of the first structure, the pressing and pulling force sensor is used for detecting collision contact, and therefore the rotation angle and the direction are adjusted by utilizing a displacement difference value of two times of collision. The invention effectively overcomes errors brought by human eyes or an image processing alignment method, is simple and quick to operate, and greatly improves the parallel alignment efficiency and precision.)

1. A coupling surface automatic parallel alignment device based on collision detection is characterized by comprising: the device comprises an X axial adjusting mechanism (2), a Y axial adjusting mechanism (1), a Z axial adjusting mechanism (3), a transverse direction rotating adjusting mechanism (4), a vertical direction rotating adjusting mechanism (5), a pressure and tension sensor (6), a second structure clamp (7), a first structure clamp (8) and an excessive collision preventing device (11);

the Y-axis adjusting structure (1) is installed on the left base (12), the transverse direction rotation adjusting mechanism (4) is installed on the Y-axis adjusting structure (1), the vertical direction rotation adjusting mechanism (5) is installed on the transverse direction rotation adjusting mechanism (4), and the second structure clamp (7) is connected with the vertical direction rotation adjusting mechanism (5) through an adapter; the Z-axis adjusting mechanism (3) is installed on the right base (13), the X-axis adjusting mechanism (2) is installed on the Z-axis adjusting mechanism (3), the first structure clamp (8) is connected with the X-axis adjusting mechanism (2) through an adapter, and the first structure clamp (8) is directly and fixedly connected with the pressure-tension sensor (6).

2. The automatic parallel alignment device for coupling surfaces based on collision detection as claimed in claim 1, wherein the second structural jig (7) is located at the intersection of the rotation axis of the lateral rotation adjusting mechanism (4) and the rotation axis of the vertical rotation adjusting mechanism (5).

3. The automatic parallel alignment device for coupling surfaces based on collision detection as claimed in claim 1, wherein the second structure (9) is mounted on the second structure holder (7), the first structure (10) is mounted on the first structure holder (8), and the upper surfaces of the first structure (10) and the second structure (9) are ensured to be at the same level.

4. The automatic coupling surface parallelism aligning device based on collision detection according to claim 1, characterized in that the coupling surface spacing between the first structure (10) and the second structure (9) should not be too large, typically between 0.5 cm and 3 cm.

5. The automatic parallel alignment device for coupling surfaces based on collision detection as claimed in claim 1, wherein the X-axis adjusting mechanism (2), the Y-axis adjusting mechanism (1), the Z-axis adjusting mechanism (3), the transverse direction rotation adjusting mechanism (4), and the vertical direction rotation adjusting mechanism (5) are all provided with stepping motors.

6. The automatic parallel alignment device for coupling surfaces based on collision detection as claimed in claim 1, characterized in that the device (11) for preventing excessive collision is a mechanically damped slide.

7. A coupling surface automatic parallel alignment method based on collision detection, characterized in that the parallel alignment method by using the parallel alignment device of any one of claims 1-6 comprises the following steps:

step 1, respectively installing a second structure (9) and a first structure (10) on a second structure clamp (7) and a first structure clamp (8), and preliminarily adjusting the parallel alignment device to enable the coupling surfaces of the first structure (10) and the second structure (9) to be basically level and to be basically positioned on the same height plane.

And 2, performing parallel alignment in the vertical direction, controlling the vertical direction rotation adjusting structure (5) to rotate the second structure (9) by an angle alpha along the clockwise or anticlockwise direction, and enabling the coupling surface of the second structure (9) to be in contact with the coupling surface of the first structure (10) in the Y-axis direction to generate collision.

And 3, controlling the Y-axis adjusting structure (1) to move forward, enabling the second structure (9) to collide with the coupling surface of the first structure (10), immediately stopping the Y-axis adjusting structure (1) from moving forward when the pressure and tension sensor (6) detects that the collision pressure reaches a set threshold value, and recording the relative displacement d1 from the initial movement to the collision detection stop movement of the Y-axis adjusting structure (1).

Step 4, controlling the Y-axis adjusting structure (1) to restore the second structure (9) to an initial position and a deflection state, controlling the vertical direction rotation adjusting structure (5) to enable the second structure (9) to rotate by an angle alpha along the opposite direction, controlling the Y-axis adjusting structure (1) to advance to collide with the first structure (10) again, stopping movement and recording the relative displacement d2 from the initial movement to the collision detection stop movement of the Y-axis adjusting structure (1) when the pressure-tension sensor (6) detects that the collision pressure reaches a set threshold value;

step 5, calibrating the device by using a functional relation theta (delta d) between a difference value delta d of the two displacements and an initial included angle theta of the two coupling surfaces, namely d1-d2, and f (delta d), drawing a delta d-theta relation curve, thereby obtaining theta angles corresponding to different delta d values, and adjusting corresponding rotation angles and rotation directions according to the value size and positive and negative conditions of the delta d to realize parallel alignment in the vertical direction;

step 6, in the transverse direction, the same method is adopted, firstly, the second structure (9) rotates by an angle alpha along the clockwise or anticlockwise direction, the motion collision is detected, and the motion displacement d3 of the sliding table is recorded; after recovery, the slide table rotates reversely by an angle alpha, and the displacement d4 from the initial movement to the collision stopping advancing is recorded.

And 7, judging whether the coupling surfaces are parallel or not through the difference value (d3-d4) of the two displacements, adjusting the corresponding rotation angle according to the relation between the displacement difference and the included angle between the coupling surfaces of the second structure (9) and the first structure (10), and determining the rotation direction according to the positive and negative of the difference value to realize parallel alignment in the transverse direction.

8. The method for automatic parallel alignment of coupling surfaces based on collision detection according to claim 7, wherein the functional relationship of step 5 is related to the size of the coupling surface of the second structure (9) and the first structure (10) and the mounting error of the intersection of the second structure holder (7) with respect to the rotation axis.

Technical Field

The invention relates to the technical field of optical communication and optical fiber sensing, in particular to a coupling surface automatic parallel alignment device and method based on collision detection.

Background

In the fields of optical communication and optical sensing application, such as coupling alignment of a PLC and an optical fiber array in the field of optical communication, alignment of an SLD light source and a tail fiber in an optical fiber gyro sensor and the like, parallel alignment of two coupling surfaces with different structures is indispensable. The current alignment means mainly adopts a manual 6-dimensional adjusting frame to adjust the relative positions of two coupling surfaces, and the two coupling surfaces are observed and judged whether to be approximately parallel or not by naked eyes through overlooking and end surface microscope imaging, and then the output power change of an optical power meter is monitored in real time, and the parallel alignment is realized through fine adjustment. By using the scheme for parallel alignment, the process flow is complex, the process consumes long time, and the production efficiency is low. As the market demand for optical communication and optical sensing applications continues to increase, the improvement of coupling accuracy and production efficiency is at a glance, and the conventional coupling alignment method cannot meet the requirement. At present, the method for realizing automatic alignment and parallelism in an industrialized mode mainly utilizes image recognition to replace naked eye observation, but due to the fact that the sizes of two coupling surfaces are different, images collected by a CCD are often not on the same plane, end faces of the images are possibly defective, image shadow blurring is easily caused, recognition errors are increased, and accordingly alignment accuracy is reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a coupling surface automatic parallel alignment device and method based on collision detection. In order to achieve the purpose, the invention adopts the following technical scheme:

a coupling surface automatic parallel alignment device based on collision detection mainly comprises: the device comprises an X axial adjusting mechanism 2, a Y axial adjusting mechanism 1, a Z axial adjusting mechanism 3, a transverse direction rotation adjusting mechanism 4, a vertical direction rotation adjusting mechanism 5, a pressure and tension sensor 6, a second structure clamp 7, a first structure clamp 8 and an excessive collision preventing device 11;

specifically, a Y-axis adjusting structure 1 is installed on a left base 12, a transverse rotation adjusting mechanism 4 is installed on the Y-axis adjusting structure 1, a vertical rotation adjusting mechanism 5 is installed on the transverse rotation adjusting mechanism 4, and a second structure clamp 7 is connected with the vertical rotation adjusting mechanism 5 through an adapter; the Z-axis adjusting mechanism 3 is installed on the right base 13, the X-axis adjusting mechanism 2 is installed on the Z-axis adjusting mechanism 3, the first structure clamp 8 is connected with the X-axis adjusting mechanism 2 through the adapter, and the first structure clamp 8 is directly and fixedly connected with the pressure-tension sensor 6.

The second structural jig 7 is located at the intersection of the rotation axes of the horizontal rotation adjustment mechanism 4 and the vertical rotation adjustment mechanism 5.

The second structure clamp 7 is provided with a second structure 9, the first structure clamp 8 is provided with a first structure 10, and the upper surfaces of the first structure 10 and the second structure 9 are ensured to be at the same horizontal height.

The distance between the coupling surfaces of the first structure 10 and the second structure 9 should not be too large, typically between 0.5 cm and 3 cm.

The X-axis adjusting mechanism 2, the Y-axis adjusting mechanism 1, the Z-axis adjusting mechanism 3, the transverse rotation adjusting mechanism 4 and the vertical rotation adjusting mechanism 5 are all provided with stepping motors.

A coupling surface automatic parallel alignment method based on collision detection comprises the following basic steps:

step 1, mounting a second structure 9 and a first structure 10 on a second structure clamp 7 and a first structure clamp 8 respectively, and primarily adjusting the parallel alignment device to enable the coupling surfaces of the first structure 10 and the second structure 9 to be basically level and to be basically positioned on the same height surface.

And 2, performing parallel alignment in the vertical direction, controlling the vertical direction rotation adjusting structure 5 to rotate the second structure 9 by an angle alpha in the clockwise or anticlockwise direction, and enabling the second structure 9 to be in contact with the coupling surface of the first structure 10 in the Y-axis direction to generate collision.

And 3, controlling the Y-axis adjusting structure 1 to advance, enabling the second structure 9 to collide with the coupling surface of the first structure 10, stopping the Y-axis adjusting structure 1 from advancing immediately when the pressure-tension sensor 6 detects that the collision pressure reaches a set threshold value, and recording the relative displacement d1 from the initial movement to the collision detection stop movement of the Y-axis adjusting structure 1.

Step 4, controlling the Y-axis adjusting structure 1 to restore the second structure 9 to an initial position and a deflection state, controlling the vertical direction rotation adjusting structure 5 to enable the second structure 9 to rotate by an angle alpha along the opposite direction, controlling the Y-axis adjusting structure 1 to advance and collide with the coupling surface of the first structure 10 again, stopping movement and recording the relative displacement d2 from the initial movement to the collision detection stop movement of the Y-axis adjusting structure 1 when the pressure-tension sensor 6 detects that the collision pressure reaches a set threshold value;

step 5, calibrating the parallel alignment device by using a functional relation theta between a difference value delta d of the two displacements and an initial included angle theta of the two coupling surfaces, namely d1-d2, namely f delta d, drawing a delta d-theta relation curve, thereby obtaining theta angles corresponding to different delta d values, and adjusting corresponding rotation angles and rotation directions according to the value size and positive and negative conditions of the delta d to realize parallel alignment in the vertical direction;

step 6, in the transverse direction, the same method is adopted, the second structure 9 is firstly rotated by an angle alpha along the clockwise direction or the anticlockwise direction, the movement collision is detected, and the movement displacement d3 of the sliding table is recorded; after recovery, the slide table rotates reversely by an angle alpha, and the displacement d4 from the initial movement to the collision stopping advancing is recorded.

And 7, judging whether the coupling surfaces are parallel or not according to the difference d3-d4 of the two displacements, adjusting the corresponding rotation angle according to the relation between the displacement difference and the included angle of the coupling surfaces of the second structure 9 and the first structure 10, and determining the rotation direction according to the positive and negative of the difference so as to realize parallel alignment in the transverse direction.

The functional relationship of step 5 is related to the size of the coupling surface of the second structure 9 and the first structure 10 and the installation error of the second structure clamp 7 relative to the intersection point of the rotating shafts.

Compared with the prior art, the invention has the following effective effects:

the invention adopts the technical scheme that a first structure is fixedly connected with a pressure and tension sensor, a second structure is rotated by a specific angle to collide with a coupling surface of the first structure, the pressure and tension sensor is used for detecting collision contact, so that the movement of the sliding table is controlled, the movement displacement of the sliding table is recorded, the sliding table is rotated by the same angle in the opposite direction to collide, and the rotation angle and the direction are adjusted by the displacement difference of two collisions. The invention can realize full automatic alignment and parallel by controlling stepping, effectively overcomes errors caused by human eyes or an image processing alignment method, has simple and rapid operation, and greatly improves the parallel alignment efficiency and precision.

Drawings

FIG. 1 is a diagram of an automatic parallel alignment device structure of coupling surface used in the present invention

FIG. 2 is a schematic diagram showing two coupling surfaces in a vertical direction being not parallel

FIG. 3 is a schematic diagram of the vertical top parallel alignment

FIG. 4 is a graph showing the relationship between the rotational displacement difference and the coupling surface angle under different errors

Detailed Description

In order to make the technical solution and advantages of the present invention clearer, the following will fully describe the technical solution in the embodiments of the present invention in detail with reference to the accompanying drawings in the embodiments of the present invention, and the embodiments of the present invention include but are not limited to the following modes:

referring to fig. 1, an automatic parallel alignment apparatus for coupling surfaces based on collision detection mainly includes: the device comprises an X axial adjusting mechanism 2, a Y axial adjusting mechanism 1, a Z axial adjusting mechanism 3, a transverse direction rotation adjusting mechanism 4, a vertical direction rotation adjusting mechanism 5, a pressure and tension sensor 6, a second structure clamp 7, a first structure clamp 8 and an excessive collision preventing device 11;

specifically, a Y-axis adjusting structure 1 is installed on a left base 12, a transverse rotation adjusting mechanism 4 is installed on the Y-axis adjusting structure 1, a vertical rotation adjusting mechanism 5 is installed on the transverse rotation adjusting mechanism 4, and a second structure clamp 7 is connected with the vertical rotation adjusting mechanism 5 through an adapter; the Z-axis adjusting mechanism 3 is installed on the right base 13, the X-axis adjusting mechanism 2 is installed on the Z-axis adjusting mechanism 3, the first structure clamp 8 is connected with the X-axis adjusting mechanism 2 through the adapter, and the first structure clamp 8 is directly and fixedly connected with the pressure-tension sensor 6.

The second structural jig 7 is located at the intersection of the rotation axes of the horizontal rotation adjustment mechanism 4 and the vertical rotation adjustment mechanism 5.

The second structure clamp 7 is provided with a second structure 9, the first structure clamp 8 is provided with a first structure 10, and the upper surfaces of the first structure 10 and the second structure 9 are ensured to be at the same horizontal height.

The distance between the coupling surfaces of the first structure 10 and the second structure 9 should not be too large, typically between 0.5 cm and 3 cm.

The X-axis adjusting mechanism 2, the Y-axis adjusting mechanism 1, the Z-axis adjusting mechanism 3, the transverse rotation adjusting mechanism 4 and the vertical rotation adjusting mechanism 5 are all provided with stepping motors.

A coupling surface automatic parallel alignment method based on collision detection comprises the following basic steps:

step 1, mounting a second structure 9 and a first structure 10 on a second structure clamp 7 and a first structure clamp 8 respectively, and primarily adjusting the parallel alignment device to enable the coupling surfaces of the first structure 10 and the second structure 9 to be basically even and to be basically on the same height surface, as shown in fig. 2.

And 2, performing parallel alignment in the vertical direction, controlling the vertical direction rotation adjusting structure 5 to rotate the second structure 9 by an angle alpha in the clockwise or anticlockwise direction, and enabling the second structure 9 to be in contact with the coupling surface of the first structure 10 in the Y-axis direction, so that collision can occur, as shown in fig. 3.

And 3, controlling the Y-axis adjusting structure 1 to advance, enabling the second structure 9 to collide with the coupling surface of the first structure 10, stopping the Y-axis adjusting structure 1 from advancing immediately when the pressure-tension sensor 6 detects that the collision pressure reaches a set threshold value, and recording the relative displacement d1 from the initial movement to the collision detection stop movement of the Y-axis adjusting structure 1.

Step 4, controlling the Y-axis adjusting structure 1 to restore the second structure 9 to an initial position and a deflection state, controlling the vertical direction rotation adjusting structure 5 to enable the second structure 9 to rotate by an angle alpha along the opposite direction, controlling the Y-axis adjusting structure 1 to advance and collide with the coupling surface of the first structure 10 again, stopping movement and recording the relative displacement d2 from the initial movement to the collision detection stop movement of the Y-axis adjusting structure 1 when the pressure-tension sensor 6 detects that the collision pressure reaches a set threshold value;

step 5, calibrating the parallel alignment device by using a functional relation theta (f delta d) between the difference value delta d of the two displacements (d 1-d 2) and the initial included angle theta of the coupling surface of the second structure 9 and the first structure 10, drawing a delta d-theta relation curve, as shown in fig. 4, so as to obtain theta angles corresponding to different delta d values, and adjusting corresponding rotation angles and rotation directions according to the values of delta d and positive and negative conditions to realize parallel alignment in the vertical direction;

step 6, in the transverse direction, the same method is adopted, the second structure 9 is firstly rotated by an angle alpha along the clockwise direction or the anticlockwise direction, the movement collision is detected, and the movement displacement d3 of the sliding table is recorded; after recovery, the slide table rotates reversely by an angle alpha, and the displacement d4 from the initial movement to the collision stopping advancing is recorded.

And 7, judging whether the coupling surfaces of the second structure 9 and the first structure 10 are parallel or not through the difference value d3-d4 of the two displacements, adjusting the corresponding rotation angle according to the relation between the displacement difference and the included angle between the coupling surfaces of the second structure 9 and the first structure 10, determining the rotation direction according to the positive and negative of the difference value, and realizing parallel alignment in the transverse direction.

The functional relationship of step 5 is related to the size of the coupling surface of the second structure 9 and the first structure 10 and the installation error of the second structure clamp 7 relative to the intersection point of the rotating shafts.

In order to better embody the advantages of the invention, the scheme of the invention is adopted for experiments, and the precision of the stepping motor of the X-axis adjusting mechanism 2, the Y-axis adjusting mechanism 1, the Z-axis adjusting mechanism 3, the transverse rotation adjusting mechanism 4 and the vertical rotation adjusting mechanism 5 is 50nm, the precision of the whole rotation step is 0.003 degrees, and the sensitivity of the pressure-tension sensor is 0.3 gram force. The coupling dimension of the second structure 9 is 1.5mm × 2.5mm, the coupling dimension of the first structure 10 is 1.8mm × 3mm, the initial included angle-3 ° < θ <3 ° between the coupling surfaces of the second structure 9 and the first structure 10 is adjusted to be visually distinguished, and the counterclockwise rotation angle is positive when the rotation angle α is 4 °. The motion is stopped when the detection threshold value of the tension sensor is set to be 0.3 gram force, the coupling surface cannot be collided and damaged at the moment, and a relation curve of respectively taking down the delta d-theta in different installation errors of the clamp can be obtained through theoretical calculation, as shown in figure 4. The curve relation is used for calibration in an experiment, and the corresponding rotation angle and rotation direction are adjusted according to the value of delta d and the positive and negative conditions, so that the parallel alignment in the vertical direction is well realized.