Automatic adjustment device for the blade of Schlieren instrument

Abstract

The utility model relates to an automatic adjustment device for a schlieren instrument blade, comprising a base, an X-axis adjustment mechanism, an X-axis position adjustment mechanism and a radial feed mechanism, and the technical key points are: a square support frame is arranged above the X-axis adjustment mechanism, a front and a rear positioning plate are supported in the middle of the square support frame, a clamping space is formed between the front and rear positioning plates, the X-axis position adjustment mechanism comprises a first servo motor, an annular rotating plate inserted into the clamping space and its transmission structure, the radial feed mechanism comprises a radial groove arranged on the annular rotating plate, a knife bar inserted into the radial groove, a support plate arranged at the outer edge of the annular rotating plate, and a knife bar radial drive structure fixed on the support plate, front and rear positioning columns are arranged on the front and rear sides of the base respectively, and a buffer structure is arranged between the front and rear positioning columns and the square support frame. The device is conducive to the blade changing its orientation around the light beam, and is conducive to adjusting the blade feeding amount, while ensuring the stability when adjusting the horizontal position of the blade, and significantly improving the work efficiency.

Description

Technical Field

[0001] The utility model relates to a schlieren instrument knife-edge photography system, in particular to an automatic adjustment device for a schlieren instrument knife-edge. Background Art

[0002] The Schlieren instrument is used for Schlieren test, that is, it is an optical display instrument used to observe the density change inside the transparent medium. The knife edge is an important component that directly affects the imaging effect, and the knife edge adjustment device is of utmost importance. The function of the knife edge is to perform optical spatial filtering at the focal position of the lens. When the light is deflected away from the knife edge, the Schlieren image will become brighter. When the light is deflected toward the knife edge, the knife edge will block the propagation of the light and the Schlieren image will become darker. Therefore, the brightness and darkness in the Schlieren image correspond to the degree of deflection of the light. The adjustment of the knife edge includes horizontal adjustment and vertical adjustment. The horizontal adjustment of the knife edge is to place the knife edge at the focal position of the lens. The vertical adjustment of the knife edge includes selecting the cutting direction of the knife edge and adjusting the feed amount of the knife edge. The purpose of the knife edge adjustment is to make the Schlieren information of the image obvious and improve the sensitivity of the Schlieren system.

[0003] CN 206847555 U discloses an automatic adjustment device for a schlieren instrument blade, comprising a schlieren instrument, a blade device, a camera, a controller and an imaging objective lens, wherein the schlieren instrument, the blade device, the imaging objective lens and the camera are arranged in a straight line in sequence, and further comprising a stepping motor, the blade device comprising a blade motor, a blade, a lead screw guide and a blade support, wherein the blade support is vertically mounted on the lead screw guide, and a rotatable blade is vertically mounted on the top of the blade support, and the blade is also connected to the blade motor. The adjustment device changes manual adjustment to mechanical adjustment, which is more conducive to accurately and reasonably adjusting the blade to the position of the focal plane. However, the following problems still exist: 1. No practical solution is given for the rotation structure and feeding structure of the blade; 2. The blade moves in the horizontal direction driven by the lead screw guide, but vibration will occur during the movement, affecting the horizontal adjustment accuracy, which is not conducive to immediate work. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic adjustment device for the blade of a schlieren instrument to solve the above-mentioned problems, which is beneficial for the blade to change its orientation around the light beam and to adjust the blade feed amount, while ensuring the stability when adjusting the horizontal position of the blade, thereby significantly improving work efficiency.

[0005] The technical solution of the utility model is:

[0006] An automatic adjustment device for a schlieren instrument blade comprises a base, an X-axis adjustment mechanism, an X-axis position adjustment mechanism and a radial feeding mechanism, and its technical key points are: the X-axis adjustment mechanism is fixed on the top of the base, a square support frame is fixed on the top of the X-axis adjustment mechanism, a front positioning plate and a rear positioning plate are supported in the middle of the square support frame, a clamping space is formed between the front positioning plate and the rear positioning plate, the X-axis position adjustment mechanism comprises an annular rotating plate inserted into the clamping space, a first servo motor inverted on the top surface of the square support frame, a transmission structure arranged between the output shaft of the first servo motor and the annular rotating plate, the front positioning plate and the rear positioning plate are supported in the middle of the square support frame, and a clamping space is formed between the front positioning plate and the rear positioning plate. The positioning plate is provided with a light-through hole corresponding to the center hole of the annular rotating plate, and the front and rear end surfaces of the annular rotating plate are provided with limit rings concentric with the center hole thereof, and the opposite surfaces of the front positioning plate and the rear positioning plate are provided with limit grooves cooperating with the limit rings. The radial feeding mechanism comprises a radial groove provided on the outer circumferential surface of the annular rotating plate and connected with the center hole thereof, a tool rod inserted into the radial groove, a support plate provided on the outer edge of the annular rotating plate, and a tool rod radial driving structure fixed on the support plate, a knife edge being fixed at the inner end of the tool rod, and front and rear positioning columns are respectively provided on the front and rear sides of the base, and a buffer structure is provided between the front and rear positioning columns and the square support frame.

[0007] In the above-mentioned automatic adjustment device for the blade of the schlieren instrument, the outer edge of the annular rotating plate leads to the coverage range of the front positioning plate and the rear positioning plate, and the transmission structure is a toggle wheel fixed to the end of the output shaft of the first servo motor, and the outer peripheral surface of the toggle wheel is in close contact with the front end face or the rear end face of the annular rotating plate. When the first servo motor drives the toggle wheel to rotate, the annular rotating plate rotates around its center line.

[0008] In the automatic adjustment device for the blade of the above-mentioned Schlieren instrument, the lower middle part of the front end surface of the front positioning plate is connected and fixed to the front port of the square support frame by means of connecting ribs, and the lower middle part of the rear end surface of the rear positioning plate is connected and fixed to the rear port of the square support frame by means of connecting ribs.

[0009] The above-mentioned automatic adjustment device for the blade of the schlieren instrument, the radial drive structure of the tool rod includes racks fixed on the front and rear end surfaces of the tool rod, a front gear and a rear gear supported on a support plate, a second servo motor connected to the axle of the rear gear, and a synchronous belt transmission structure connected between the axles of the front and rear gears, the front gear is meshed with the rack on the front end surface of the tool rod, the rear gear is meshed with the rack on the rear end surface of the tool rod, and a limit stopper is fixed to the outer end of the tool rod.

[0010] The automatic adjustment device for the blade of the above-mentioned Schlieren instrument has two front and two rear positioning columns, which are respectively fixed on the left and right sides of the base. Front and rear connecting ears are respectively provided on the left and right side walls of the square support frame. The buffer structure includes a front buffer spring assembly connected between the front connecting ear and the front positioning column on the corresponding side, and a rear buffer spring assembly connected between the rear connecting ear and the rear positioning column on the corresponding side.

[0011] The automatic adjustment device for the blade of the above-mentioned Schlieren instrument, the X-axis adjustment mechanism includes a left linear module and a right linear module fixed to the upper surface of the base, a horizontal linkage plate connected to the sliders of the left linear module and the right linear module, and the square support frame is fixed above the horizontal linkage plate.

[0012] The beneficial effects of the utility model are:

[0013] 1. The X-axis adjustment mechanism and the buffer structure ensure the movement stability of the square support frame, and avoid the vibration of the square support frame during the movement, thereby ensuring the high position accuracy of the blade, so that the blade can be quickly adjusted to the set position, that is, the lens focus position, to enhance the adjustment effect and improve work efficiency.

[0014] 2. The above-mentioned X-axis position adjustment mechanism is conducive to quickly changing the orientation of the blade relative to the light beam, and the above-mentioned radial feed mechanism is conducive to quickly adjusting the feed amount of the blade relative to the light beam. The structure has good stability and significantly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 Left view of

[0017] Figure 3 It is a working state schematic diagram of the utility model.

[0018] In the figure: 1. front positioning column, 2. front buffer spring assembly, 3. square support frame, 4. front gear, 5. support plate, 6. front positioning plate, 7. knife edge, 8. light hole, 9 connecting rib, 10 left linear module, 11. base, 12. annular rotating plate, 13. limit ring, 14. rear positioning plate, 15. center hole, 16. knife rod, 17. rear buffer spring assembly, 18. rear positioning column, 19. front connecting ear, 20. rear connecting ear, 21. toggle wheel, 22. second servo motor, 23 rear gear, 24. first servo motor, 25 limit baffle, 26. rack, 27. synchronous belt drive structure, 28. right linear module. DETAILED DESCRIPTION

[0019] The utility model is described in detail according to the accompanying drawings of the specification.

[0020] like Figure 1 to Figure 3 As shown, the automatic adjustment device for the blade of the schlieren instrument includes a base 11, an X-axis adjustment mechanism, an X-axis position adjustment mechanism and a radial feeding mechanism.

[0021] The X-axis adjustment mechanism is fixed on the base 11 , a square support frame 3 is fixed on the X-axis adjustment mechanism, a front positioning plate 6 and a rear positioning plate 14 are supported in the middle of the square support frame 3 , and a clamping space is formed between the front positioning plate 6 and the rear positioning plate 14 .

[0022] The X-axis position adjustment mechanism includes an annular rotating plate 12 inserted into the clamping space, a first servo motor 24 inverted on the top surface of the square support frame 3, and a transmission structure arranged between the output shaft of the first servo motor 24 and the annular rotating plate 12. The front positioning plate 6 and the rear positioning plate 14 are provided with a light-through hole 8 corresponding to the center hole 15 of the annular rotating plate 12, and the front and rear end surfaces of the annular rotating plate 12 are provided with a limit ring 13 concentric with the center hole 15 thereof, and the opposite surfaces of the front positioning plate 6 and the rear positioning plate 14 are provided with a limit groove matched with the limit ring 13. In this embodiment, the outer edge of the annular rotating plate 12 leads to the coverage range of the front positioning plate 6 and the rear positioning plate 14, and the transmission structure is a toggle wheel 21 fixed to the end of the output shaft of the first servo motor 24, and the outer peripheral surface of the toggle wheel 21 is in close contact with the rear end surface of the annular rotating plate 12. When the first servo motor 24 drives the toggle wheel 21 to rotate, the annular rotating plate 12 rotates around its center line.

[0023] The radial feeding mechanism includes a radial groove provided on the outer circumferential surface of the annular rotating plate 12 and connected to the center hole 15 thereof, a knife bar 16 inserted into the radial groove, a support plate 5 provided on the outer edge of the annular rotating plate 12, and a knife bar radial driving structure fixed on the support plate 5. In this embodiment, the knife bar radial driving structure includes a rack 26 fixed on the front and rear end surfaces of the knife bar 16, a front gear 4 and a rear gear 23 supported on the support plate 5, a second servo motor 22 connected to the axle of the rear gear 23, and a synchronous belt transmission structure 27 connected between the axles of the front and rear gears. The front gear 4 meshes with the rack 26 on the front end surface of the knife bar 16, the rear gear 23 meshes with the rack 26 on the rear end surface of the knife bar 16, a limit stopper 25 is fixed on the outer end of the knife bar 16, and a knife edge 7 is fixed on the inner end of the knife bar 16.

[0024] The X-axis adjustment mechanism includes a left linear module 10 and a right linear module 28 fixed to the upper surface of the base 11, a horizontal linkage plate connected to the sliders of the left linear module 10 and the right linear module 28, and the square support frame 3 is fixed above the horizontal linkage plate. The front end surface of the front positioning plate 6 is connected and fixed to the front port of the square support frame 3 by the connecting rib 9 in the middle and lower part, and the rear end surface of the rear positioning plate 14 is connected and fixed to the rear port of the square support frame 3 by the connecting rib 9 in the middle and lower part.

[0025] Front and rear positioning columns 1 and 18 are respectively provided on the front and rear sides of the base 11, and a buffer structure is provided between the front and rear positioning columns 1 and 18 and the square support frame 3. In this embodiment, there are two front and rear positioning columns 1 and 18, respectively, which are fixed on the left and right sides of the base 11, and front and rear connecting ears 19 and 20 are respectively provided on the left and right side walls of the square support frame 3. The buffer structure includes a front buffer spring assembly 2 connected between the front connecting ear 19 and the front positioning column 1 on the corresponding side, and a rear buffer spring assembly 17 connected between the rear connecting ear 20 and the rear positioning column 18 on the corresponding side.

[0026] Working principle:

[0027] 1. Start the left linear module 10 and the right linear module 28 to drive the square support frame 3 to move along the X direction, so as to adjust the horizontal position of the blade 7 and quickly adjust it to the lens focus position.

[0028] 2. Start the first servo motor 24 to drive the toggle wheel 21 to rotate, thereby achieving the purpose of toggling the annular rotating plate 12 to rotate around the X-axis, which is conducive to quickly changing the orientation of the knife edge 7 relative to the light beam, see Figure 3 .

[0029] 3. Start the second servo motor 22 to drive the rear gear 23 to rotate. At the same time, the front gear 4 is driven to rotate synchronously through the synchronous belt transmission structure 27. The front and rear gears jointly drive the rack 26 and the knife bar 16 to move along the radial groove, thereby driving the blade 7 fixed at the inner end of the knife bar 16 to move toward or out of the center hole 15, which is conducive to quickly adjusting the feed amount of the blade 7 relative to the light beam.

[0030] The above embodiments of the present invention are described in detail, but the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. An automatic adjustment device for a schlieren instrument blade, comprising a base, an X-axis adjustment mechanism, an X-axis position adjustment mechanism and a radial feeding mechanism, characterized in that: The X-axis adjustment mechanism is fixed on the top of the base, and a square support frame is fixed on the top of the X-axis adjustment mechanism. The middle part of the square support frame supports a front positioning plate and a rear positioning plate, and a clamping space is formed between the front positioning plate and the rear positioning plate. The X-axis position adjustment mechanism includes an annular rotating plate inserted into the clamping space, a first servo motor inverted on the top surface of the square support frame, and a transmission structure arranged between the output shaft of the first servo motor and the annular rotating plate. The front positioning plate and the rear positioning plate are provided with a light-through hole corresponding to the center hole of the annular rotating plate, and the front and rear end surfaces of the annular rotating plate are provided with a limit ring concentric with the center hole thereof. The opposite surfaces of the front positioning plate and the rear positioning plate are provided with a limit groove matched with the limit ring. The radial feeding mechanism includes a radial groove arranged on the outer peripheral surface of the annular rotating plate and connected with the center hole thereof, a tool rod inserted into the radial groove, a support plate arranged on the outer edge of the annular rotating plate, and a tool rod radial driving structure fixed on the support plate. A knife edge is fixed on the inner end of the tool rod, and front and rear positioning columns are respectively arranged on the front and rear sides of the base, and a buffer structure is arranged between the front and rear positioning columns and the square support frame.

2. The automatic adjustment device for the blade edge of the Schlieren instrument according to claim 1, characterized in that: The outer edge of the annular rotating plate leads to the coverage range of the front positioning plate and the rear positioning plate. The transmission structure is a toggle wheel fixed to the end of the output shaft of the first servo motor. The outer peripheral surface of the toggle wheel is in close contact with the front end face or the rear end face of the annular rotating plate. When the first servo motor drives the toggle wheel to rotate, the annular rotating plate rotates around its center line.

3. The automatic adjustment device for the blade edge of a Schlieren instrument according to claim 1, characterized in that: The front end surface of the front positioning plate is fixedly connected to the front port of the square support frame at the lower middle part by means of connecting ribs, and the rear end surface of the rear positioning plate is fixedly connected to the rear port of the square support frame at the lower middle part by means of connecting ribs.

4. The automatic adjustment device for the blade edge of a Schlieren instrument according to claim 1, characterized in that: The radial drive structure of the tool rod includes racks fixed on the front and rear end surfaces of the tool rod, a front gear and a rear gear supported on a support plate, a second servo motor connected to the axle of the rear gear, and a synchronous belt transmission structure connected between the axles of the front and rear gears. The front gear is meshed with the rack on the front end surface of the tool rod, and the rear gear is meshed with the rack on the rear end surface of the tool rod. A limit stopper is fixed to the outer end of the tool rod.

5. The automatic adjustment device for the blade edge of a Schlieren instrument according to claim 1, characterized in that: There are two front and two rear positioning columns, which are fixed on the left and right sides of the base respectively. Front and rear connecting ears are provided on the left and right side walls of the square support frame respectively. The buffer structure includes a front buffer spring assembly connected between the front connecting ear and the front positioning column on the corresponding side, and a rear buffer spring assembly connected between the rear connecting ear and the rear positioning column on the corresponding side.

6. The automatic adjustment device for the blade edge of a Schlieren instrument according to claim 1, characterized in that: The X-axis adjustment mechanism includes a left linear module and a right linear module fixed to the upper surface of the base, a horizontal linkage plate connected to the sliders of the left linear module and the right linear module, and the square support frame is fixed above the horizontal linkage plate.

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