Glass tube end face angle tester and measuring method thereof

Abstract

The present invention discloses a glass tube end face angle tester, which includes a glass tube fixing part and a light source, a receiving screen is arranged between the light source and the glass tube fixing part; a reflective device is fixed on the glass tube fixing part, the reflective device needs to be arranged in close contact with the glass tube end face or parallel to the glass tube end face, and the reflective device can be adjusted synchronously when the glass tube is adjusted; the reflective device is irradiated by the light source, and the reflective device reflects to the receiving screen, and the spot position size collected by the spot collection device is combined with the size of the light source and the reflective point to calculate the end face angle of the glass tube. The present invention also discloses an angle calculation method, which can realize the analysis and calculation of the glass tube deflection angle under predetermined conditions, and obtain accurate data of the glass tube deflection.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber accessories, and in particular relates to a glass tube end face angle tester and a measuring method thereof. Background Art

[0002] As we all know, with the increasing application of fiber-optic communication and fiber-optic sensing in telecommunications, aerospace, navigation, and industrial manufacturing, the demand for fiber-optic devices is increasing. In particular, with the development and popularization of 5G communication technology, the requirements for fiber-optic devices are getting higher and higher. Products with high performance parameters and high reliability cannot be separated from precision parts, and one of the most important parts is the high-precision glass tube. On the one hand, the glass tube material is required to be high borosilicate material with good temperature characteristics, and on the other hand, the glass tube shape and size are required to be precise, especially the end face of the glass tube must be perpendicular to the cylindrical surface. The verticality requires 90±0.1°. Because the diameter of the glass tube is very small, the diameter is approximately between 1.0mm and 4.5mm, so how to measure the verticality of the glass tube has become a technical problem that needs to be solved in this field.

[0003] In view of the fact that there is no good measurement method and measurement equipment for glass tubes, as technicians in this field, how to improve the technology and design a glass tube end face angle tester that can achieve effective and accurate measurement of glass tubes is an important topic that the research and development departments in this field are currently tackling. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a glass tube end face angle tester and a measurement method thereof, which realizes precise measurement of the glass tube end face by means of a light source, a receiving device and a fixing device through fixed-point irradiation of a light source.

[0005] In order to achieve the above technical objectives, the present invention adopts the following scheme: a glass tube end face angle tester, which includes a glass tube fixing part and a light source, and a receiving screen is arranged between the light source and the glass tube fixing part; a reflecting device is fixed on the glass tube fixing part, and the reflecting device needs to be arranged in close contact with the end face of the glass tube or parallel to the end face of the glass tube, and the reflecting device can be adjusted synchronously when the glass tube is adjusted; the reflecting device is irradiated by the light source, and the reflecting device reflects light to the receiving screen, and the spot position size collected by the spot collecting device is combined with the size of the light source and the reflecting point to realize the calculation of the glass tube end face angle.

[0006] The glass tube fixing part is fixed on a test bench, and the test bench is provided with an adjustment component to adjust the horizontal state of the test bench.

[0007] A support rod is arranged on the upper part of the test bench, and two fixing clips are arranged on the support rod, one fixing clip is used to fix the light source and the receiving screen, and the other fixing clip is used to fix the light spot collection device.

[0008] The reflective device is a reflector, on which a counterweight block is arranged, and the counterweight block is used to constrain the reflector to be arranged in contact with the end face of the glass tube.

[0009] The light spot collection device is connected to the fixed clamp through a clamp, and the clamp includes a fixed clamping part and a movable clamping part. The fixed clamping part and the movable clamping part are both provided with threaded fixing blocks. A screw rod passes through the fixed clamping part and the movable clamping part and is screwed and adjusted through a screw rod force handle. The pressure plates at the ends of the fixed clamping part and the movable clamping part are opened and closed by adjustment, thereby achieving the clamping and loosening of the light spot collection device.

[0010] The bottom plate of the glass tube fixing part is arranged in parallel with the receiving screen; a light spot collection device is arranged corresponding to the receiving screen, and the light spot collection device is a CCD camera. The CCD camera captures the reflected light signal in the receiving screen and realizes data calculation and analysis after connecting with external equipment.

[0011] The glass tube fixing part includes a bottom plate, a bottom adjustment hole is arranged on the bottom plate for realizing position adjustment, an adjustment seat is arranged on the upper part of the bottom plate, a middle adjustment hole is arranged on the adjustment seat, a vertical plate is also arranged on the adjustment seat, a vertical adjustment hole is arranged on the vertical plate, a base is fixed on the vertical plate, a glass tube clamp is fixed on the base, and the glass tube clamp realizes swing adjustment through the base.

[0012] The vertical adjustment hole comprises a hinge hole and an arc adjustment hole, and the base is fixed on the vertical plate through the cooperation of the two holes, thereby realizing swing adjustment.

[0013] The glass tube clamp comprises a clamp seat, on which a movable guide portion is arranged, and the movable guide portion cooperates with a fixed guide portion on a base to realize lateral guide constraint; the clamp seat is provided with a hinge shaft connected to a clamping portion, an elastic component is arranged between the rear end of the clamping portion and the clamp seat, and the head end of the clamp seat cooperates with the head end of the clamping portion to realize the clamping of the glass tube.

[0014] Using the glass tube end face angle tester as described above, the method for measuring the deflection angle of the glass tube end face using the glass tube end face angle tester is described as follows:

[0015] The following parameters are preset:

[0016] A. Light source point; B. Reflection point of reflector; C. Light spot received by receiving screen; D. DB⊥mirror surface, ∠ABD=∠DBC;

[0017] E. The light spot received by the receiving screen after the reflector rotates by angle a; F is a point on AE, FB⊥mirror surface; ∠ABF=∠FBE; draw a perpendicular line from A to EB, and the foot of the perpendicular is G;

[0018] Step 1: Preset the position of point A; preset the position of point C, preset the position of point B, AC=Xmm, AB=Ymm; the line connecting points A, B, and C forms an isosceles triangle;

[0019] Step 2: By adjusting the angle of the reflector, the light emitted from point A can be made to hit point C on the receiving screen. At this time, the reflector is in a horizontal state, ∠ABD=arcsin(X / 2 / Y)=b;

[0020] Step 3: When the reflector rotates by angle a (a<0.3°), ∠ABF=∠FBE=a+b, a=(arcsin(AG / AB)) / 2-b, then ∠EAB=∠CAB<90°;

[0021] Because ∠EAG<∠ABE<0.3°+b=d, so AG≈AE,

[0022] Further calculations show that a≈(arcsin(AE / 1200)) / 2-0.477°;

[0023] At this time, a is the rotation angle of the reflector, that is, the deflection angle of the glass tube surface.

[0024] In step 3, when adjusting the mirror rotation angle a, point E should fall on the extension line of AC.

[0025] The beneficial effects of the present invention are as follows: through the above arrangement, the present invention discloses a glass tube end face angle tester through the above structural arrangement, including a glass tube fixing part and a light source, a receiving screen is arranged between the light source and the glass tube fixing part; a reflecting device is fixed on the glass tube fixing part, the reflecting device needs to be arranged in close contact with the end face of the glass tube or in parallel with the end face of the glass tube, and the adjustment of the reflecting device can be realized synchronously when the glass tube is adjusted; the reflecting device is irradiated by the light source, and the reflecting device reflects light to the receiving screen, and the spot position size collected by the spot collecting device is combined with the size of the light source and the reflecting point to realize the calculation of the glass tube end face angle; the present invention also discloses an angle calculation method, which can realize the analysis and calculation of the glass tube deflection angle under predetermined conditions, and obtain accurate data of the glass tube deflection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The three-dimensional structure of the device is shown in FIG. Figure Ⅰ ;

[0027] Figure 2The three-dimensional structure of the device is shown in FIG. Figure II ;

[0028] Figure 3 This is a schematic diagram of the fixed structure of the light spot collection device;

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the glass tube fixing part;

[0030] Figure 5 for Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0031] Figure 6 is a schematic diagram of the three-dimensional structure of the reflector;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the reflector plus the counterweight block;

[0033] Figure 8 This is a schematic diagram of the correction principle of the measurement method of the glass tube end face angle tester;

[0034] Fig. 9 This is a schematic diagram of the glass tube end face angle tester testing an actual product;

[0035] In the accompanying drawings, 1, workbench, 10, glass tube, 11, reflector, 12, counterweight, 2, computer, 3, CCD camera, 4, glass tube fixing part, 41, glass tube clamp, 410, clamp seat, 411, guide protrusion, 412, clamping part, 413, spring, 414, connecting screw, 415, V-groove, 416, hinge shaft, 42, test bench, 43, adjustment screw, 44, bottom plate, 441, bottom adjustment hole, 45, adjustment seat, 451, middle adjustment hole, 452, vertical plate, 453, arc adjustment hole, 454, hinge hole, 46, base, 461, guide groove, 5, support rod, 51, lower fixing clamp, 52, upper fixing clamp, 6, receiving screen, 7, laser spotlight, 8, clamp, 81, movable clamping part, 82, fixed clamping part, 83, fixed side pressure plate, 84, fixed support seat, 85, first threaded fixing block, 86, movable side pressure plate, 87, movable support seat, 88, screw force handle, 89, second threaded fixing block. DETAILED DESCRIPTION

[0036] Referring to the accompanying drawings, a glass tube end face angle tester is arranged on the upper part of a workbench 1, on which a computer 2 for data calculation and analysis is arranged; a test table 42 is arranged on the workbench, and the test table 42 is arranged in a flat plate structure, and adjustment screws 43 are arranged at its four corners, and the horizontal state of the test table can be adjusted by adjusting the screws 43;

[0037] A support rod 5 is disposed on the upper portion of the test bench 42 , and a lower fixing clamp 51 and an upper fixing clamp 52 are disposed on the support rod 5 , and the receiving screen 6 and the CCD camera 3 are fixed respectively by the two fixing clamps.

[0038] A glass tube fixing part 4 is fixed on the test bench 42, and the glass tube fixing part includes a bottom plate 44, and a bottom adjustment hole 441 is provided on the bottom plate 44 for realizing position adjustment. An adjustment seat 45 is provided on the upper part of the bottom plate 44, and a middle adjustment hole 451 is provided on the adjustment seat 45. A vertical plate 452 is also provided on the adjustment seat 45, and a hinge hole 454 and an arc adjustment hole 453 are provided on the vertical plate 452. The base 46 is fixed on the vertical plate 452 through the cooperation of the two holes. A glass tube clamp 41 is fixed on the base 46, and the glass tube clamp 41 can be swung and adjusted on the base through the hinge hole 454 and the arc adjustment hole 453.

[0039] The bottom adjustment hole 441 and the middle adjustment hole 451 are both long holes and are arranged at 90 degrees. The cooperation of the two holes can realize the front, back, left, and right adjustment of the glass tube clamp 41 on the test bench 42 .

[0040] The glass tube clamp 41 is provided for the purpose of vertically clamping the glass tube. The technical solution discloses a glass tube clamp 41 which can flexibly clamp the glass tube and is easy to operate. Figure 4 As shown, it includes a clamping seat 410, on which a guide protrusion 411 is arranged, and the movable guide portion 411 cooperates with the guide groove 461 on the base 46 to realize lateral guide constraint; the clamping seat 410 is provided with a hinge shaft 416 connected to the clamping portion 412, and a spring 413 is arranged between the rear end of the clamping portion 412 and the clamping seat 410, and the V-shaped groove 415 at the head end of the clamping seat 410 cooperates with the head end of the clamping portion to realize the clamping of the glass tube 10.

[0041] The device is provided with a receiving screen 6 directly above the test bench 42, and a laser spotlight 7 is provided on the receiving screen 6; the CCD camera 3 is directly above the receiving screen 6, and a reflecting device is fixed on the glass tube fixing portion 4. In the present embodiment, the reflecting device adopted is a reflector 11, and the reflector is placed on the end face of the glass tube or arranged parallel to the end face of the glass tube. When the glass tube 10 is adjusted, the reflector 11 can be adjusted synchronously; the reflector 11 is irradiated with a light source, and the reflector 11 reflects light to the receiving screen, and the angle of the end face of the glass tube is calculated by combining the size of the light spot position collected by the CCD camera 3 with the size of the light source and the reflecting point.

[0042] Based on the above structural arrangement, a problem often encountered is that the end face of the glass tube 10 cannot be completely fitted onto the reflector 11. The present applicant has made improvements to solve this problem. A counterweight 12 is provided on the periphery of the reflector 11. After the reflector 11 is placed on the end face of the glass tube, the counterweight 12 is used to achieve the counterweight when the end face of the glass tube 10 is fixed. The counterweight is used to constrain the reflector to fit the end face of the glass tube.

[0043] Furthermore, the present technical solution also discloses a clamp 8 for fixing the CCD camera 3, such as Figure 3 As shown, the clamp 8 includes a fixed clamping part 82 and a movable clamping part 81, the fixed clamping part 82 and the movable clamping part 81 are hinged and are provided with pressure plates at the ends, namely a fixed side pressure plate 83 and a movable side pressure plate 86, and the CCD camera 3 is clamped by the fixed side pressure plate 83 and the movable side pressure plate 86; a first threaded fixing block 85 is fixed on the fixed clamping part 82 through a fixed support seat 84, and a second threaded fixing block 89 is fixed on the movable clamping part 81 through a movable support seat 87, a screw rod penetrates the fixed clamping part 82 and the movable clamping part 81 and is screwed and adjusted through a screw rod force handle 88, and the pressure plates at the ends of the fixed clamping part 82 and the movable clamping part 81 are opened and closed by adjustment, thereby clamping and releasing the light spot collection device.

[0044] With the above structure set up, the laser spotlight 7 can emit light. A reflector 11 is fixed on the glass tube 10. The reflector 11 reflects light to the receiving screen 6. The spot position size collected by the CCD camera 3 is combined with the size of the light source and the reflection point to calculate the angle of the end face of the glass tube, so as to determine the inclination angle of the end face of the glass tube.

[0045] The glass tube end face angle tester as described above, and the method for measuring the deflection angle of the glass tube end face using the glass tube end face angle tester are described as follows:

[0046] Preset the following parameters on the above devices:

[0047] A. The light spot of the laser spotlight; B. The light spot of the reflector; C. The light spot received by the receiving screen; D. DB⊥mirror surface, ∠ABD=∠DBC;

[0048] E. The light spot received by the receiving screen after the reflector rotates by angle a; F is a point on AE, FB⊥mirror surface; ∠ABF=∠FBE; draw a perpendicular line from A to EB, and the foot of the perpendicular is G;

[0049] Step 1: Preset the position of point A; preset the position of point C, preset the position of point B, AC=10mm, AB=1200mm; the line connecting points A, B, and C forms an isosceles triangle;

[0050] Step 2: Turn on the laser spotlight 7, and the light from point A irradiates point B. By adjusting the angle of the reflector 11, the reflected light spot hits point C on the receiving screen. At this time, the reflector is in a horizontal state, ∠ABD=arcsin(10 / 2 / 1200)=0.477°;

[0051] Step 3: Clamp the glass tube 10 in the V-shaped groove 415. At this time, the preset inclination angle of the end face of the glass tube 10 is a (a<0.3°), then ∠ABF=∠FBE=a+0.477, and according to the formula a=(arcsin(AG / AB)) / 2-0.477°, at this time ∠EAB=∠CAB<90°; In this step, it should be noted that when adjusting the rotation angle of the reflector, Figure 8 and Fig. 9 As shown, point E must fall on the extension line of AC; after the above dimensions are limited, because ∠EAG<∠ABE<0.3°+0.477°=0.777°, AG≈AE, further calculation, a≈(arcsin(AE / 1200)) / 2-0.477°;

[0052] At this time, a is the rotation angle of the reflector, that is, the deflection angle of the end face of the glass tube.

Claims

1. A glass tube end face angle tester, characterized in that: It comprises a glass tube fixing part and a light source, a receiving screen is arranged between the light source and the glass tube fixing part; a reflective device is fixed on the glass tube fixing part, the reflective device needs to be arranged in close contact with the end face of the glass tube or arranged in parallel with the end face of the glass tube, and the reflective device can be adjusted synchronously when the glass tube is adjusted; the reflective device is irradiated by the light source, and the reflective device reflects light to the receiving screen; the reflective device is a reflector, a counterweight is arranged on the reflector, and the counterweight constrains the reflector to be arranged in close contact with the end face of the glass tube; The bottom plate of the glass tube fixing part is arranged in parallel with the receiving screen; a light spot collection device is arranged corresponding to the receiving screen, and the light spot collection device is a CCD camera, which captures the reflected light signal in the receiving screen through the CCD camera and realizes data calculation and analysis after connecting with external equipment; The glass tube fixing part comprises a bottom plate, the bottom plate is provided with a bottom adjustment hole for realizing position adjustment, the upper part of the bottom plate is provided with an adjustment seat, the adjustment seat is provided with a middle adjustment hole, the adjustment seat is also provided with a vertical plate, the vertical plate is provided with a vertical adjustment hole, a base is fixed on the vertical plate, a glass tube clamp is fixed on the base, and the glass tube clamp realizes swing adjustment through the base; the vertical adjustment hole comprises a hinge hole and an arc adjustment hole, and the base is fixed on the vertical plate through the cooperation of the two holes, so as to realize swing adjustment; The light spot collection device is connected to the fixed clamp through a clamp, and the clamp includes a fixed clamping part and a movable clamping part. The fixed clamping part and the movable clamping part are both provided with threaded fixing blocks. A screw rod passes through the fixed clamping part and the movable clamping part and is screwed and adjusted through a screw rod force handle. The pressure plates at the ends of the fixed clamping part and the movable clamping part are opened and closed by adjustment, thereby achieving the clamping and loosening of the light spot collection device.

2. The glass tube end face angle tester according to claim 1, characterized in that: The glass tube fixing part is fixed on a test bench, and the test bench is provided with an adjustment component to adjust the horizontal state of the test bench.

3. The glass tube end face angle tester according to claim 2, characterized in that: A support rod is arranged on the upper part of the test bench, and two fixing clips are arranged on the support rod, one fixing clip is used to fix the light source and the receiving screen, and the other fixing clip is used to fix the light spot collection device.

4. The glass tube end face angle tester according to claim 1, characterized in that: The glass tube clamp comprises a clamp seat, on which a movable guide portion is arranged, and the movable guide portion cooperates with a fixed guide portion on a base to realize lateral guide constraint; the clamp seat is provided with a hinge shaft connected to a clamping portion, an elastic component is arranged between the rear end of the clamping portion and the clamp seat, and the head end of the clamp seat cooperates with the head end of the clamping portion to realize the clamping of the glass tube.

Images