Light Speed Adjustable Laser Interference System Applied to Orthopedic Tooling for Turbojet Nozzle Housing

Abstract

A light speed adjustable laser interference system applied to a orthopedic tool for a turbojet nozzle housing, including a Michelson interference system, including an orthopedic tool. The orthopedic tool includes a bottom plate, a front plate, a rear plate and an upper plate. The front plate, the rear plate and the upper plate form an installation frame. A first through hole is provided above the installation frame, and an upper pressing orthopedic mechanism is assembled in the first through hole. A Michelson interference system is provided on the bottom plate. The Michelson interference system includes a light path difference light speed fine adjustment system. The light path difference light speed fine adjustment system includes a glass tube, an oil container and a two-way pump. A fuel supply port is provided on the side wall of the glass tube. The glass tube is vertically arranged on the light path between the beam splitter and the reflecting mirror. A floating transparent thin sheet with a density less than that of the light-transmitting oil is arranged in the glass tube. The optical path difference is adjusted by the way of the liquid level rising and falling in the light path difference light speed fine adjustment system, and equal optical paths are achieved between the reflecting mirror and the transmitting mirror, greatly improving the accuracy of positioning, measurement and orthopedic correction.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and particularly to a laser interference system. Background Art

[0002] The nozzle of a jet engine is one of the key components of the engine, and its design and manufacturing precision directly affect the performance of the engine, such as thrust, fuel efficiency, noise, etc. The nozzle is usually made of superalloy and needs to withstand extreme temperatures and pressures. During the manufacturing process, geometric shape deviations may occur due to thermal deformation or mechanical stress. At this time, an orthopedic tooling is required to restore its design dimensions.

[0003] The nozzle has characteristics of thin walls and multi-curvatures, such as a convergent-divergent profile. The orthopedic effect of complex geometric shapes is uneven, and it is difficult for traditional rigid tooling to apply force evenly. Local over-extrusion may cause buckling or wrinkling, while areas with insufficient support are under-corrected, and manual intervention is required for adjustment, resulting in poor consistency.

[0004] An interferometer is a precision measuring instrument designed based on the principle of wave superposition, mainly used to obtain information on the phase or optical path difference of waves through interference phenomena, thereby indirectly measuring physical quantities. Its core principle is to divide a beam of waves (such as light waves) into two or more beams, propagate through different paths and then recombine, and deduce the target parameters by analyzing the changes in interference fringes.

[0005] A laser interferometer can measure the angular swing and vibration frequency of a moving axis, and analyze the laser linewidth in combination with acousto-optic modulation technology. With its nanometer-level precision and wide applicability, the interferometer has become a core tool in scientific research and industrial inspection. From basic physical experiments to cosmic observations, and then to microelectronic manufacturing and biomedical engineering, its technology has continuously promoted the innovation in the field of precision measurement.

[0006] 0]During the process of using an interferometer to assist in high-precision orthopedics, the adjustment of the distances between the optical components of the interferometer is generally manually adjusted and fixed. For example, the positions of the mirror, the beam splitter, the laser, etc. The positional relationship of these optical components directly determines the detection performance of the device, and even the correctness of the detection results. Manual adjustment has personal experience and other uncertainty factors, which are likely to cause errors.

[0007] In addition, for the adjusted interferometer, during a single measurement, the positions of the optical components are fixed. Therefore, no matter whether the imaging effect is clear or not, it is difficult to perform manual intervention again. Summary of the Invention

[0008] The purpose of the present invention is to provide a light-speed adjustable laser interference system applied to an orthopedic tooling for a turbofan nozzle housing to solve the problems existing in the above-mentioned prior art.

[0009] The above technical purpose of the present invention is achieved through the following technical solutions:

[0010] A light speed adjustable laser interference system applied to an orthopedic tool for a turbojet nozzle housing, including a Michelson interference system. The Michelson interference system includes a laser, a beam splitter, a reflecting mirror, a transmitting mirror, an industrial camera, and a microprocessor system, and includes an orthopedic tool. The orthopedic tool includes a bottom plate, a front plate, a rear plate, and an upper plate;

[0011] The front plate, the rear plate, and the upper plate form an installation frame;

[0012] A first through hole is provided above the installation frame, and an upper pressing and orthopedic mechanism is assembled in the first through hole;

[0013] An upper driving device is provided above the upper pressing and orthopedic mechanism;

[0014] The upper pressing and orthopedic mechanism includes a tightening part and a pressing part;

[0015] The tightening part is arranged above the upper plate, and the bottom of the tightening part is fixedly connected to the upper part of the pressing part through a locking bolt;

[0016] The pressing part is arranged below the upper plate, and the lower part of the pressing part has an inclined surface;

[0017] The Michelson interference system further includes a light path travel difference light speed fine adjustment system;

[0018] The reflecting mirror is fixed on the pressing part and is used to monitor the up and down movement distance of the pressing part;

[0019] The transmitting mirror is fixed on the orthopedic tool and is used to cooperate with the laser, the beam splitter, and the reflecting mirror to form a first Michelson interference optical path;

[0020] The microprocessor system reads the interference image of the first Michelson interference optical path through the industrial camera;

[0021] The light path travel difference light speed fine adjustment system includes a glass tube, an oil container, and a two-way pump;

[0022] The side wall of the glass tube has an oil supply port, the oil supply port is connected to one pump port of the two-way pump, the other pump port of the two-way pump is connected to the oil container, and the oil container stores light-transmitting oil;

[0023] Both ends of the glass tube are flat and transparent, and the glass tube is vertically arranged on the optical path between the beam splitter and the reflecting mirror;

[0024] A floating transparent thin sheet with a density less than that of the light-transmitting oil is arranged in the glass tube, and the thin sheet is used to eliminate the concavity and convexity of the liquid surface of the light-transmitting oil.

[0025] By adopting the above technical solution, the upper pressing and orthopedic mechanism of the orthopedic tooling can greatly improve the orthopedic accuracy with the aid of the Michelson interference system. The Michelson interference system includes a main optical system, an industrial camera, and a light path difference and light speed fine-tuning system. The main optical system is a conventional Michelson interferometer including a laser, a beam splitter, a reflecting mirror, a transmitting mirror, an industrial camera, and a microprocessor system. The settings of the reflecting mirror, the transmitting mirror, and the beam splitter in the main optical system, as well as the optical path, are the same as those in the prior art. However, when the industrial camera detects interference fringes with unequal and large light path differences, due to problems such as low contrast and blurred interference fringes, the actual monitoring accuracy cannot meet the needs of orthopedics. Therefore, an equal optical path needs to be achieved between the reflecting mirror and the transmitting mirror;

[0026] Since both the reflecting mirror and the transmitting mirror are arranged on the orthopedic tooling or the upper pressing and orthopedic mechanism through mounting rods, the adjustment can be made by adjusting the mounting rods. However, this adjustment method has poor accuracy and is very cumbersome;

[0027] After introducing the light path difference and light speed fine-tuning system, the height of the light-transmitting oil in the glass tube can be adjusted by relying on a two-way pump. The height of the light-transmitting oil affects the time required for light to pass through, and accordingly adjusts the light path difference. The refractive index of the light-transmitting oil has a smaller impact on the light path, which can further improve the adjustment accuracy. The glass tube is generally arranged vertically or horizontally and is always arranged on the optical path between the laser and the mirror, so as to achieve the adjustment of the light path difference. In this solution, the industrial camera uses a high-resolution MOS camera to monitor the change of interference fringes. The transparent sheet can effectively reduce the fluctuation of the liquid level in the glass tube. The equal optical path difference significantly increases the contrast of the interference fringes, making the recognition accuracy of the MOS camera higher, and also greatly improving the positioning, measurement, and orthopedic accuracy.

[0028] In a further embodiment, the reflecting mirror is fixedly installed on the pressing part through a first mounting rod;

[0029] One end of the first mounting rod provided with the reflecting mirror extends out of the mounting frame;

[0030] The reflecting surface of the reflecting mirror is arranged horizontally;

[0031] The transmitting mirror is fixedly installed on the right side of the rear plate through a second mounting rod;

[0032] The reflecting surface of the transmitting mirror is arranged vertically.

[0033] By adopting the above technical solution, the reflecting mirror and the transmitting mirror form an orthogonal optical path layout. The extended design of the first mounting rod avoids the occlusion of the optical path by the frame structure. The combination of the horizontal and vertical reflecting surfaces ensures that a stable interference optical path is formed after the laser beam passes through the beam splitter, providing a reference plane for displacement measurement.

[0034] In a further embodiment, a second through hole is provided on the front plate, and the second through hole is used to accommodate the front end of the nozzle to be orthopedically corrected.

[0035] On the left and right sides of the second through hole, front pressing and orthopedic mechanisms are respectively provided.

[0036] The front pressing and orthopedic mechanism includes a positioning plate and a movable plate.

[0037] The positioning plate is an L-shaped plate fixed to the lower left front side of the front plate. The positioning plate does not exceed the left and lower edges of the front plate, and the bending part of the positioning plate is located at the lower left corner of the front plate.

[0038] The movable plate includes an extrusion part and a locking part.

[0039] The extrusion part is arranged at the right front side of the front plate. The bottom of the extrusion part is slidably mounted on the inner upper side of the positioning plate, and a locking part is integrally formed on the right side of the extrusion part.

[0040] The locking part is perpendicular to the extrusion part and is arranged in the direction of the rear side of the front plate.

[0041] Another locking bolt is provided on the locking part. The movable plate is movably connected to the front plate through the another locking bolt. The movable plate is used to cooperate with the positioning plate to extrude and orthopedically correct the front end of the nozzle to be orthopedically corrected at the second through hole.

[0042] A right driving device is arranged on the right side of the locking part.

[0043] By adopting the above technical solution, a front pressing and orthopedic mechanism is arranged between the front plate and the fixed plate, and the positioning plate is completely covered between the front plate and the fixed plate.

[0044] The movable plate includes an extrusion part and a locking part, and the locking part is arranged outside the front plate and the fixed plate. When the movable plate is driven, the movable plate will approach the positioning plate, so as to orthopedically correct the fixed nozzle to be orthopedically corrected. The upper pressing and orthopedic mechanism is installed above the upper plate.

[0045] Due to the thin-walled part characteristic of the nozzle, applying pressure to one place may cause deformation in another place. Therefore, the front pressing mechanism and the upper pressing mechanism actually perform extrusion and orthopedic correction synchronously.

[0046] In a further embodiment, a fixed plate is arranged in front of the front pressing and orthopedic mechanism.

[0047] Four first screw holes are provided at the four corners on the front side of the fixed plate;

[0048] The fixed plate is bolted to the front plate;

[0049] An avoidance groove is provided above the extrusion part;

[0050] The avoidance groove is used to avoid the bolt in the upper right when the extrusion part moves from left to right;

[0051] A plurality of second screw holes corresponding to the positions of the first screw holes are provided at the upper left end, the lower left end and the lower right end on the front side of the positioning plate, and the positioning plate is bolted to the front plate.

[0052] By adopting the above technical solutions, the fixed plate is rigidly fixed to the front plate through bolt connections at the four corners. The three-point screw hole layout of the positioning plate ensures the installation stability while avoiding interference with the bolts of the front plate. The design of the avoidance groove of the extrusion part allows it to avoid the fixed bolts during the full stroke movement, ensuring the continuity of the orthopedic action.

[0053] In a further embodiment, another Michelson interferometer system is also provided on the bottom plate;

[0054] The another Michelson interferometer system includes another laser, another beam splitter, another reflecting mirror, another transmitting mirror, another industrial camera and another optical path difference light speed fine-tuning system;

[0055] The another reflecting mirror is provided on the locking part and is used to monitor the left and right moving distance of the locking part;

[0056] The another transmitting mirror is provided at the upper front end of the fixed plate and is used to cooperate with another laser, another beam splitter and another reflecting mirror to form a second Michelson interference optical path;

[0057] The Michelson interferometer system and the another Michelson interferometer system share a microprocessor system;

[0058] The microprocessor system reads the interference image of the second Michelson interference optical path through another industrial camera.

[0059] By adopting the above technical solutions, the second set of Michelson interferometer system is the same as the first set, but the movable plate moves horizontally and cooperates with the positioning plate for extrusion orthopedics, while the upper pressing orthopedic mechanism moves from top to bottom. Therefore, the orientations of the beam splitters set in the two are different, and the lasers are both set vertically upward. The two sets of Michelson interferometers share a microprocessor system, enabling the pressing mechanisms on both sides to cooperate more closely and avoiding unexpected deformation of the thin-walled parts during multiple extrusions in different directions.

[0060] In a further embodiment, the other reflecting mirror is fixedly mounted on the locking portion through a third mounting rod;

[0061] The third mounting rod is an L-shaped rod, and the end of the third mounting rod where the other reflecting mirror is provided extends forward from the front side of the fixing plate;

[0062] The reflecting surface of the other reflecting mirror is vertically arranged;

[0063] The other transmissive mirror is fixedly mounted on the front side of the fixing plate through a fourth mounting rod;

[0064] The reflecting surface of the other transmissive mirror is horizontally arranged.

[0065] By adopting the above technical solution, the second interference system independently monitors the orthopedic displacement in the horizontal direction. Its L-shaped mounting rod ensures that the mirror moves synchronously with the locking portion, and the arrangement of the vertical and horizontal reflecting surfaces forms a complete interference optical path.

[0066] In a further embodiment, the other optical path difference light speed fine-tuning system includes another glass tube, another oil container and another two-way pump;

[0067] The other glass tube is vertically arranged on the optical path between the other beam splitter and the other transmissive mirror.

[0068] By adopting the above technical solution, the glass tube in another optical path difference light speed fine-tuning system is also vertically arranged. For the adjustment of the optical path difference, whether adjusting the transmissive mirror or the reflecting mirror is the same. As long as the final optical path difference is equal, the contrast of the image will be higher, and it is also more convenient for the MOS camera to identify, thereby improving the orthopedic accuracy.

[0069] In a further embodiment, the light-transmitting oil can be any one of silicone oil, white oil, synthetic ester oil, fluorinated oil, vegetable oil or methyl silicone oil.

[0070] By adopting the above technical solution, several listed light-transmitting oils all have high light transmittance, stability of refractive index, low volatility and moderate viscosity. They can not only accurately control the liquid level through a peristaltic pump, but also reduce the liquid surface disturbance. Among them, methyl silicone oil has excellent temperature stability and chemical inertness, suitable for long-term use. Synthetic ester oil has better refractive index matching characteristics, and can quickly stabilize the liquid surface through the fine-tuning of the peristaltic pump combined with the damping effect of the floating sheet, ensuring the repeatability of the optical path difference adjustment, avoiding the errors existing in the traditional mechanical stage for adjusting the optical path, and is especially suitable for rapid calibration in high-precision industrial scenarios;

[0071] The light speed travel difference fine-tuning system using methyl silicone oil has the characteristics of being colorless, transparent, with good light transmittance, resistant to temperature (-50°C to 200°C), having weak volatility inside the device, being chemically stable for an extremely long time, and having moderate liquid viscosity, high adjustment sensitivity and accuracy.

[0072] The speed of light in air is generally taken as 3×10 8 m / s.

[0073] The refractive index range of methyl silicone oil at 25°C is usually: 1.390 - 1.410, and the specific value varies slightly with viscosity and temperature. For example: low-viscosity silicone oil: refractive index 1.375; medium-high viscosity silicone oil: refractive index 1.403. Taking the typical refractive index 1.395 as an example, the calculated speed of light is: 2.15×10 8 m / s.

[0074] In this invention, by adjusting the liquid level height in the glass tube, the travel distance of light in the transparent liquid is adjusted. Furthermore, a high-precision optical path (optical path difference) adjustment is formed.

[0075] Taking methyl silicone oil as an example, the difference in the speed of light between the two is 0.85×10 8 m / s, accounting for 28% of the speed of light in air. When the liquid level height in the glass tube is adjusted by 1 mm, it is only equivalent to adjusting the position of the optical device by 0.28 mm.

[0076] It is possible to achieve the effect of adjusting a relatively large liquid level height, which is equivalent to adjusting a relatively small liquid level height in the glass tube. Therefore, the adjustment accuracy is greatly improved.

[0077] In a further embodiment, above the liquid levels of the glass tube and another glass tube, in the transparent liquid storage container, the remaining space outside the liquid is a vacuum space.

[0078] In a further embodiment, both the two-way pump and another two-way pump adopt peristaltic pumps, and the flexible tubes of the peristaltic pumps are all arranged in a vacuum container.

[0079] By adopting the above technical solutions, the glass tube and the oil container are both evacuated. One is to ensure smooth flow, and the other is to ensure the stability and linearity of the flow, ensuring the operation accuracy of the device. The flexible pump tubes of the peristaltic pumps are encapsulated in a vacuum box body, realizing the combined use of the peristaltic pumps and the evacuated glass tube and oil container, improving the optical path difference adjustment efficiency while avoiding the liquid level oscillation caused by pressure fluctuations.

[0080] In summary, the present invention has the following beneficial effects:

[0081] 1. The combination of a Michelson interferometer system and a light path difference and light speed fine-tuning system enables nanometer-level precision nozzle correction control. Conventional correction tooling relies on manual experience to determine deformation, while the dual-interference system of the present invention monitors vertical and horizontal displacement changes in real time, working in conjunction with a microprocessor system to achieve closed-loop control. The light path difference adjustment system uses a liquid medium to adjust the optical path, offering higher resolution and stability than mechanical adjustment methods. In particular, the floating sheet design effectively suppresses liquid surface fluctuations, enhancing the contrast of interference fringes and making the Michelson interferometer system's optical path adjustment more efficient. This significantly improves the recognition accuracy of industrial cameras and correction precision.

[0082] 2. The upper and front clamping orthopedic mechanisms are independently driven but work in tandem, allowing for real-time adjustment of force magnitude and direction based on the movement distance fed back by the interference system. The L-shaped mounting rod and avoidance groove design ensure both accurate positioning of the optical elements and freedom of movement for the mechanical components. The three-point bolt fixing method ensures that the positioning plate remains stable even when subjected to large orthopedic forces, thereby avoiding secondary deformation problems associated with traditional tooling due to insufficient rigidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] Figure 1 This is a schematic diagram of the overall structure of the light-speed adjustable laser interferometer system applied to the orthopedic tooling for the turbojet nozzle housing of the present invention, which is used to illustrate the positional relationship between the Michelson interferometer system and the light path difference light speed fine-tuning system on the orthopedic tooling;

[0084] Figure 2 This is a partial structural diagram of a Michelson interferometer system in a light-speed adjustable laser interferometer system used in a turbojet nozzle housing correction tooling device according to the present invention;

[0085] Figure 3 This is a schematic diagram of the structure of the orthopedic tooling used in the light speed adjustable laser interference system of the present invention applied to the orthopedic tooling of the turbojet nozzle housing;

[0086] Figure 4 This is a schematic diagram of an upper pressing and corrective mechanism in a light-speed adjustable laser interference system used in a turbojet nozzle housing corrective tooling device according to the present invention;

[0087] Figure 5 This is a schematic diagram of a front-pressing correction mechanism in a light-speed adjustable laser interference system used in a turbojet nozzle housing correction tooling device according to the present invention;

[0088] Figure 6 It is a structural schematic diagram of a light speed fine-tuning system for reflecting light travel difference in a light speed adjustable laser interference system applied to a turbojet nozzle housing correction tool of the present invention.

[0089] In the figure, 1. orthopedic tooling; 11. bottom plate; 12. front plate; 13. back plate; 14. upper plate; 2. upper pressing orthopedic mechanism; 21. tightening part; 22. pressing part; 3. upper driving device; 4. Michelson interference system; 41. laser; 42. beam splitter; 43. reflecting mirror; 44. transmitting mirror; 45. industrial camera; 46. microprocessor system; 47. light path difference and light speed fine-tuning system; 471. glass tube; 472. oil container; 473. bidirectional pump; 5. sheet; 6. front pressing orthopedic mechanism; 61. positioning plate; 62. movable plate; 621. extrusion part; 622. locking part; 7. fixed plate; 8. right driving device; 9. another reflecting mirror; 10. another transmitting mirror. DETAILED DESCRIPTION

[0090] The present invention is further described in detail below with reference to the accompanying drawings.

[0091] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description, the terms "bottom" and "top," "inner" and "outer" refer to directions toward or away from a particular component geometry, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this specification, "plurality" means two or more, unless the direction of the center is explicitly and specifically defined otherwise.

[0092] like Figures 1-6As shown in the figure, an adjustable light-speed laser interference system applied to a orthopedic tool for a turbojet nozzle housing includes a Michelson interference system 4. The Michelson interference system includes a laser 41, a beam splitter 42, a reflecting mirror 43, a transmitting mirror 44, an industrial camera 45, and a microprocessor system 46. It includes an orthopedic tool 1, which includes a bottom plate 11, a front plate 12, a rear plate 13, and an upper plate 14. The front plate 12, the rear plate 13, and the upper plate 14 form an installation frame. A first through hole is provided above the installation frame, and an upper pressing and orthopedic mechanism 2 is assembled in the first through hole. An upper driving device 3 is provided above the upper pressing and orthopedic mechanism 2. The upper pressing and orthopedic mechanism 2 includes a tightening part 21 and a pressing part 22. The tightening part 21 is arranged above the upper plate 14, and the bottom of the tightening part 21 is fixedly connected to the upper part of the pressing part 22 through a locking bolt. The pressing part 22 is arranged below the upper plate 14, and the lower part of the pressing part 22 has an inclined surface. The Michelson interference system 4 further includes a light-path travel difference and light-speed fine-tuning system 47. The reflecting mirror 43 is fixed on the pressing part 22 and is used to monitor the up-and-down movement distance of the pressing part 22. The transmitting mirror 44 is fixed on the orthopedic tool 1 and is used to cooperate with the laser 41, the beam splitter 42, and the reflecting mirror 43 to form a first Michelson interference optical path. The microprocessor system 46 reads the interference image of the first Michelson interference optical path through the industrial camera 45. The light-path travel difference and light-speed fine-tuning system 47 includes a glass tube 471, an oil container 472, and a two-way pump 473. A fuel supply port is provided on the side wall of the glass tube 471, and the fuel supply port is connected to one pump port of the two-way pump 473. The other pump port of the two-way pump 473 is connected to the oil container 472, and a light-transmitting oil is stored in the oil container 472. The two ends of the glass tube 471 are flat and transparent. The glass tube 471 is vertically arranged on the optical path between the beam splitter 42 and the reflecting mirror 43. A floating transparent thin sheet 5 with a density less than that of the light-transmitting oil is arranged in the glass tube 471, and the thin sheet 5 is used to eliminate the concavity and convexity of the light-transmitting oil liquid surface.

[0093] By adopting the above technical solution, the upper pressing and orthopedic mechanism 2 of the orthopedic tool 1 can greatly improve the orthopedic accuracy with the help of the Michelson interference system 4. The Michelson interference system 4 includes a main optical system, an industrial camera 45, and a light-path travel difference and light-speed fine-tuning system 47. The main optical system is a conventional Michelson interferometer including a laser 41, a beam splitter 42, a reflecting mirror 43, a transmitting mirror 44, an industrial camera 45, and a microprocessor system 46. The settings of the reflecting mirror 43, the transmitting mirror 44, and the beam splitter 42 in the main optical system, as well as the optical path, are the same as those in the prior art. However, when the industrial camera 45 detects interference fringes with unequal optical path differences and large deviations, due to problems such as low contrast and blurred interference fringes, the actual monitoring accuracy cannot meet the needs of orthopedics. Therefore, it is necessary to achieve equal optical paths between the reflecting mirror 43 and the transmitting mirror 44.

[0094] Since both the reflecting mirror 43 and the transmitting mirror 44 are arranged on the orthopedic tooling 1 or the upper pressing orthopedic mechanism 2 through the mounting rods, the adjustment can be made by adjusting the mounting rods. However, this adjustment method has poor accuracy and is very cumbersome;

[0095] After introducing the light path difference light speed fine-tuning system 47, the height of the light-transmitting oil in the glass tube 471 can be adjusted by relying on the two-way pump 473. The height of the light-transmitting oil affects the time required for light to pass through it, and accordingly adjusts the optical path difference. The refractive index of the light-transmitting oil has a smaller impact on the optical path, thus further improving the adjustment accuracy. The glass tube 471 is generally arranged vertically or horizontally and is always arranged on the light path between the laser 41 and the mirror, so as to realize the adjustment of the optical path difference. In this solution, the industrial camera 45 uses a high-resolution MOS camera to monitor the change of the interference fringes. The transparent sheet 5 can effectively reduce the fluctuation of the liquid level in the glass tube 471. When the optical path difference significantly increases the contrast of the interference fringes, the recognition accuracy of the MOS camera is higher, and the positioning, measurement and orthopedic accuracy are also greatly improved.

[0096] In a further embodiment, the reflecting mirror 43 is fixedly mounted on the pressing portion 22 through the first mounting rod. The end of the first mounting rod where the reflecting mirror 43 is arranged extends out of the mounting frame. The reflecting surface of the reflecting mirror 43 is arranged horizontally. The transmitting mirror 44 is fixedly mounted on the right side of the rear plate 13 through the second mounting rod. The reflecting surface of the transmitting mirror 44 is arranged vertically.

[0097] By adopting the above technical solution, the reflecting mirror 43 and the transmitting mirror 44 form an orthogonal optical path layout. The extended design of the first mounting rod avoids the occlusion of the optical path by the frame structure. The combination of the horizontal and vertical reflecting surfaces ensures that the laser beam forms a stable interference optical path after passing through the beam splitter 42, providing a reference plane for displacement measurement.

[0098] In a further embodiment, a second through-hole is provided on the front plate 12. The second through-hole is used to accommodate the front end of the nozzle to be orthopedically corrected. On the left and right sides of the second through-hole, a front pressing and orthopedic mechanism 6 is respectively provided. The front pressing and orthopedic mechanism 6 includes a positioning plate 61 and a movable plate 62. The positioning plate 61 is an L-shaped plate fixedly arranged at the lower left front side of the front plate 12. The positioning plate 61 does not exceed the left and lower edges of the front plate 12. The bent part of the positioning plate 61 is located at the lower left corner of the front plate 12. The movable plate 62 includes an extrusion part 621 and a locking part 622. The extrusion part 621 is arranged at the right front side of the front plate 12. The bottom of the extrusion part 621 is slidably installed on the upper inner side of the positioning plate 61. A locking part 622 is integrally formed on the right side of the extrusion part 621. The locking part 622 is perpendicular to the extrusion part 621 and is arranged in the direction of the rear side of the front plate 12. Another locking bolt is provided on the locking part 622. The movable plate 62 is movably connected to the front plate 12 through another locking bolt. The movable plate 62 is used to cooperate with the positioning plate 61 to extrude and orthopedically correct the front end of the nozzle to be orthopedically corrected at the second through-hole. A right driving device 8 is provided on the right side of the locking part 622.

[0099] By adopting the above technical solution, a front pressing and orthopedic mechanism 6 is provided between the front plate 12 and the fixed plate 7, and the positioning plate 61 is completely covered between the front plate 12 and the fixed plate 7;

[0100] The movable plate 62 includes an extrusion part 621 and a locking part 622, and the locking part 622 is arranged outside the front plate 12 and the fixed plate 7. When the movable plate 62 is driven, the movable plate 62 will move closer to the positioning plate 61, so as to orthopedically correct the fixed nozzle to be orthopedically corrected. The upper pressing and orthopedic mechanism 2 is installed above the upper plate 14;

[0101] Due to the thin-walled part characteristics of the nozzle, applying pressure to one place may cause deformation in another place. Therefore, the front pressing mechanism and the upper pressing mechanism actually perform extrusion and orthopedic correction simultaneously.

[0102] In a further embodiment, a fixed plate 7 is provided in front of the front pressing and orthopedic mechanism 6. First screw holes are provided at the four corners of the front side of the fixed plate 7. The fixed plate 7 is bolted to the front plate 12. An avoidance groove is provided above the extrusion part 621. The avoidance groove is used to avoid the bolt at the upper right when the extrusion part 621 moves from left to right. A plurality of second screw holes corresponding to the positions of the first screw holes are provided at the upper left end, the lower left end, and the lower right end of the front side of the positioning plate 61. The positioning plate 61 is bolted to the front plate 12.

[0103] By adopting the above technical solution, the fixing plate 7 is rigidly fixed to the front plate 12 through bolt connections at the four corners. The three-point screw hole layout of the positioning plate 61 ensures installation stability while avoiding bolt interference with the front plate 12. The avoidance groove design of the extrusion part 621 allows it to avoid the fixing bolts during full-stroke movement, ensuring the continuity of the orthopedic action.

[0104] In a further embodiment, another Michelson interferometer system is also provided on the bottom plate 11. The another Michelson interferometer system includes another laser, another beam splitter, another reflecting mirror 9, another transmitting mirror 10, another industrial camera, and another optical path difference light speed fine-tuning system. The another reflecting mirror 9 is arranged on the locking part 622 for monitoring the left-right movement distance of the locking part 622. The another transmitting mirror 10 is arranged at the upper front side of the fixing plate 7 for cooperating with the another laser, another beam splitter, and another reflecting mirror 9 to form a second Michelson interference optical path. The Michelson interferometer system 4 and the another Michelson interferometer system share the microprocessor system 46, and the microprocessor system 46 reads the interference image of the second Michelson interference optical path through the another industrial camera.

[0105] By adopting the above technical solution, the second set of Michelson interferometer system 4 is the same as the first set, but the movable plate 62 moves horizontally and cooperates with the positioning plate 61 for extrusion orthopedics, while the upper pressing orthopedic mechanism 2 moves from top to bottom. Therefore, the orientations of the beam splitters 42 provided in the two are different, and the lasers 41 are both vertically upward. The two sets of Michelson interferometers share a microprocessor system 46, enabling the pressing mechanisms on both sides to cooperate more closely and avoiding unexpected deformation of the thin-walled parts during multiple extrusions in different directions.

[0106] In a further embodiment, the another reflecting mirror 9 is fixedly installed on the locking part 622 through a third mounting rod. The third mounting rod is an L-shaped rod. The end of the third mounting rod provided with the another reflecting mirror 9 extends from the rear to the front out of the front side of the fixing plate 7. The reflecting surface of the another reflecting mirror 9 is vertically arranged. The another transmitting mirror 10 is fixedly installed on the front side of the fixing plate 7 through a fourth mounting rod. The reflecting surface of the another transmitting mirror 10 is horizontally arranged.

[0107] By adopting the above technical solution, the second set of interferometer system independently monitors the orthopedic displacement in the horizontal direction. Its L-shaped mounting rod ensures that the mirror moves synchronously with the locking part 622, and the arrangement of the vertical and horizontal reflecting surfaces forms a complete interference optical path.

[0108] In a further embodiment, the another optical path difference light speed fine-tuning system includes another glass tube, another oil container, and another two-way pump. The another glass tube is vertically arranged on the optical path between the another beam splitter and the another transmitting mirror 10.

[0109] By adopting the above technical solution, the glass tube 471 in another light path difference and light speed fine-tuning system 47 is also vertically arranged. For the adjustment of the optical path difference, it doesn't matter whether it is to adjust the transmission mirror or the reflection mirror 43. As long as the final optical path difference is equal, the contrast of the image will be higher, and it will be more convenient for the MOS camera to identify, thereby improving the orthopedic accuracy.

[0110] In a further embodiment, the light-transmitting oil can be any one of silicone oil, white oil, synthetic ester oil, fluorinated oil, vegetable oil or methyl silicone oil.

[0111] By adopting the above technical solution, the several light-transmitting oils listed all have high light transmittance, stability of refractive index, low volatility and moderate viscosity. They can not only accurately control the liquid level through a peristaltic pump, but also reduce the liquid surface disturbance. Among them, methyl silicone oil has excellent temperature stability and chemical inertness and is suitable for long-term use. Synthetic ester oil has better refractive index matching characteristics and can quickly stabilize the liquid surface through the fine adjustment of the peristaltic pump combined with the damping effect of the floating sheet 5, ensuring the repeatability of the optical path difference adjustment and avoiding the errors existing in the traditional mechanical stage for adjusting the optical path. It is especially suitable for rapid calibration in high-precision industrial scenarios.

[0112] The light speed path difference fine-tuning system using methyl silicone oil has the characteristics of good colorless transparent light transmittance, heat resistance (-50°C to 200°C), weak volatility inside the device, stable chemical properties within an extremely long time, moderate liquid viscosity, high adjustment sensitivity and accuracy.

[0113] The speed of light in air is generally taken as 3×10 8 m / s.

[0114] The refractive index range of methyl silicone oil at 25°C is usually: 1.390 to 1.410, and the specific value varies slightly with viscosity and temperature. For example: low-viscosity silicone oil: refractive index 1.375; medium-high viscosity silicone oil: refractive index 1.403. Taking the typical refractive index 1.395 as an example, the light speed is calculated as: 2.15×10 8 m / s.

[0115] In the present invention, by adjusting the liquid level height in the glass tube, the travel distance of light in the transparent liquid is adjusted. Furthermore, a high-precision optical path (optical path difference) adjustment is formed.

[0116] Taking methyl silicone oil as an example, the difference in the speed of light between the two is 0.85×10 8 m / s, accounting for 28% of the speed of light in air. When the liquid level height in the glass tube is adjusted by 1 mm, it is only equivalent to adjusting the position of the optical device by 0.28 mm.

[0117] It is possible to achieve the effect of adjusting a large liquid level height, which is equivalent to adjusting a smaller liquid level height in the glass tube. Therefore, the adjustment accuracy is greatly improved.

[0118] In a further embodiment, above the liquid levels of the glass tube 471 and another glass tube, in the transparent liquid storage container, the remaining space outside the liquid is a vacuum space.

[0119] In a further embodiment, both the two-way pump 473 and another two-way pump employ peristaltic pumps, and the flexible tubes of the peristaltic pumps are all arranged in a vacuum container.

[0120] By adopting the above technical solution, the glass tube 471 and the oil container 472 are both evacuated. Firstly, it ensures smooth flow. Secondly, it ensures stable and linear flow, guaranteeing the operation precision of the equipment. The flexible pump tube of the peristaltic pump is encapsulated in a vacuum box body, realizing the combined use of the peristaltic pump and the evacuated glass tube 471 and oil container 472. While improving the optical path difference adjustment efficiency, it avoids the liquid level oscillation caused by pressure fluctuations.

[0121] In the embodiments disclosed in the present invention, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0122] This specific embodiment is only an explanation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A light-speed adjustable laser interference system for a turbojet nozzle housing correction tool, comprising a Michelson interference system (4), wherein the Michelson interference system comprises a laser (41), a beam splitter (42), a reflective mirror (43), a transmissive mirror (44), an industrial camera (45), and a microprocessor system (46), and is characterized in that: The orthopedic tool (1) comprises a bottom plate (11), a front plate (12), a back plate (13) and an upper plate (14); The front plate (12), the rear plate (13) and the upper plate (14) form a mounting frame; A first through hole is provided above the mounting frame, and an upper pressing and corrective mechanism (2) is mounted in the first through hole; An upper driving device (3) is provided above the upper compression orthopedic mechanism (2); The upper pressing orthopedic mechanism (2) comprises a tightening portion (21) and a pressing portion (22); The tightening portion (21) is arranged above the upper plate (14), and the bottom of the tightening portion (21) is fixedly connected to the top of the pressing portion (22) via a locking bolt; The pressing portion (22) is arranged below the upper plate (14), and an inclined surface is provided below the pressing portion (22); The Michelson interference system (4) further includes a light path difference light speed fine-tuning system (47); The reflective mirror (43) is fixed on the pressing portion (22) and is used to monitor the vertical movement distance of the pressing portion (22); The transmission reflector (44) is fixed on the orthopedic tool (1) and is used to cooperate with the laser (41), the beam splitter (42) and the reflection reflector (43) to form a first Michelson interference light path; The microprocessor system (46) reads the interference image of the first Michelson interference light path through the industrial camera (45); The light path difference light speed fine-tuning system (47) includes a glass tube (471), an oil container (472) and a bidirectional pump (473); The side wall of the glass tube (471) has an oil supply port, which is connected to one pump port of a two-way pump (473), and the other pump port of the two-way pump (473) is connected to an oil container (472), and the oil container (472) stores light-transmitting oil; Both ends of the glass tube (471) are flat and transparent, and the glass tube (471) is vertically arranged on the light path between the beam splitter (42) and the reflective mirror (43); A floating transparent sheet (5) having a density lower than that of the light-transmitting oil is provided in the glass tube (471), and the sheet (5) is used to eliminate the unevenness of the light-transmitting oil liquid surface; The front plate (12) is provided with a second through hole, and the second through hole is used to accommodate the front end of the nozzle to be corrected; Front compression and correction mechanisms (6) are respectively provided on the left and right sides of the second through hole; The front compression correction mechanism (6) comprises a positioning plate (61) and a movable plate (62); The positioning plate (61) is an L-shaped plate fixed to the lower left front side of the front plate (12). The positioning plate (61) does not exceed the left edge and the lower edge of the front plate (12). The bending part of the positioning plate (61) is located at the lower left corner of the front plate (12). The movable plate (62) comprises a pressing portion (621) and a locking portion (622); The extrusion portion (621) is arranged at the front right end of the front plate (12), the bottom of the extrusion portion (621) is slidably mounted on the inner upper side of the positioning plate (61), and a locking portion (622) is integrally formed on the right side of the extrusion portion (621); The locking portion (622) is perpendicular to the extrusion portion (621), and the locking portion (622) is arranged toward the rear side of the front plate (12); Another locking bolt is provided on the locking portion (622), and the movable plate (62) is movably connected to the front plate (12) via the other locking bolt. The movable plate (62) is used to cooperate with the positioning plate (61) to squeeze the front end of the nozzle to be corrected at the second through hole of the correction; A right driving device (8) is provided on the right side of the locking portion (622); A fixing plate (7) is provided in front of the front pressing and correcting mechanism (6); First screw holes are provided at the four corners of the front side of the fixing plate (7); The fixing plate (7) is connected to the front plate (12) by bolts; An avoidance groove is provided above the extrusion portion (621); The avoidance groove is used to avoid the bolt on the upper right side when the extrusion portion (621) moves from left to right; The upper left end, the lower left end and the lower right end of the front side of the positioning plate (61) are each provided with a plurality of second screw holes corresponding to the positions of the first screw holes, and the positioning plate (61) is bolted to the front plate (12).

2. The light speed adjustable laser interferometer system for turbojet nozzle housing correction tooling according to claim 1 is characterized in that: The reflective mirror (43) is fixedly mounted on the pressing portion (22) via a first mounting rod; One end of the first mounting rod provided with a reflective mirror (43) extends out of the mounting frame; The reflecting surface of the reflecting mirror (43) is arranged horizontally; The transmission reflector (44) is fixedly mounted on the right side of the rear plate (13) via a second mounting rod; The reflecting surface of the transmission reflector (44) is arranged vertically.

3. The light speed adjustable laser interferometer system for turbojet nozzle housing correction tooling according to claim 1 is characterized in that: Another Michelson interference system is also provided on the base plate (11); The other Michelson interference system includes another laser, another beam splitter, another reflective mirror (9), another transmissive mirror (10), another industrial camera, and another light path difference and light speed fine-tuning system; The other reflective mirror (9) is provided on the locking portion (622) and is used to monitor the left-right movement distance of the locking portion (622); The other transmission mirror (10) is arranged at the upper end of the front side of the fixed plate (7) and is used to cooperate with another laser, another beam splitter and another reflection mirror (9) to form a second Michelson interference light path; The Michelson interferometer system (4) and another Michelson interferometer system share a microprocessor system (46); The microprocessor system (46) reads the interference image of the second Michelson interference optical path through another industrial camera.

4. The light speed adjustable laser interferometer system for turbojet nozzle housing correction tooling according to claim 3 is characterized in that: The other reflective mirror (9) is fixedly mounted on the locking portion (622) via a third mounting rod; The third mounting rod is an L-shaped rod, and one end of the third mounting rod is provided with another reflective mirror (9) extending from the rear to the front of the fixing plate (7); The reflecting surface of the other reflecting mirror (9) is arranged vertically; The other transmissive reflector (10) is fixedly mounted on the front side of the fixed plate (7) via a fourth mounting rod; The reflection surface of the other transmission reflector (10) is arranged horizontally.

5. The light speed adjustable laser interferometer system for turbojet nozzle housing correction tooling according to claim 4 is characterized in that: The other light path difference and light speed fine-tuning system comprises another glass tube, another oil container and another bidirectional pump; The other glass tube is vertically arranged on the light path between the other beam splitter plate and the other transmission reflector (10).

6. The light speed adjustable laser interferometer system for turbojet nozzle housing correction tooling according to claim 1 is characterized in that: The light-transmitting oil is any one of silicone oil, white oil, synthetic ester oil, fluorinated oil, vegetable oil and methyl silicone oil.

7. The light-speed adjustable laser interferometer system for use in a turbojet nozzle housing correction tool according to claim 5, characterized in that: Above the liquid level of the glass tube (471) and the other glass tube, the transparent liquid is placed in the container, and the remaining space outside the liquid is a vacuum space.

8. The light-speed adjustable laser interferometer system for use in a turbojet nozzle housing correction tooling according to claim 5 is characterized in that: The bidirectional pump (473) and the other bidirectional pump are both peristaltic pumps, and the flexible tubes of the peristaltic pumps are both arranged in a vacuum container.

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