CN215676981U

CN215676981U - Small-size angle measuring platform

Info

Publication number: CN215676981U
Application number: CN202122244660.2U
Authority: CN
Inventors: 刘殿双; 刘忠夫; 张有林
Original assignee: Changchun Cgul Infrared Technology Co ltd
Current assignee: Changchun Cgul Infrared Technology Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-01-28
Anticipated expiration: 2031-09-16

Abstract

The utility model relates to a small angle measuring platform, and belongs to the field of photoelectric detection and detection systems. The upper end of the platform is matched with an optical lens and a camera module for use. The platform is provided with a locking fine-tuning device, so that the remote target can be quickly and roughly searched and positioned, and the remote target can be accurately positioned. The platform is internally provided with an azimuth and pitching electronic encoder, and can acquire high-precision angle data. The platform is provided with a pitching fine adjustment compensation device, under the working condition of a large elevation angle, the situation that the fine adjustment device fails due to the large gravity component is responded, the compensation device can increase auxiliary reverse elasticity so as to realize bidirectional fine adjustment under the working condition of the elevation angle, and the elasticity is adjustable according to different load weights. The lower end of the platform is provided with a leveling mechanism which is matched with the level bubble to level the platform stably. The platform design has circular attenuator, when the every single move direction was not locked, slows down the speed that the carrier assembly has declined, prevents hard striking stopper. Small volume, light weight, portability and suitability for multiple fields.

Description

Small-size angle measuring platform

Technical Field

The utility model relates to the field of photoelectric detection and detection systems, in particular to a rotating platform capable of bearing a photoelectric assembly, and particularly relates to a small angle measuring platform. The platform can accurately measure the directions of the photoelectric components and the angles of pitching motion, and accurately record angle values through the electronic encoder and upload the angle values to the control host.

Background

With the development of photoelectric technology in China and the increasing requirements of various fields on measurement, various measuring and surveying instruments, such as theodolites and total stations, have been widely applied in various fields. However, these instruments have high measurement accuracy and complete functions, so that the instruments have large volume and weight, are not portable and are relatively expensive; in the aspect of operation, the requirement on an instrument operator is higher, the instrument operator generally needs to be trained to operate, and meanwhile, the requirement on the use environment of the instrument is also higher, such as anti-shake, dust prevention, moisture prevention and the like.

In some special fields, such as the detection task of the impact point of an army target range, although a theodolite or a total station can complete the measurement task and obtain high-precision measurement data, the detection task does not need to have such high precision; the requirements of the measurement operation on soldiers and the use environment are high; the instrument has high maintenance cost and inconvenient carrying, and the cost performance of the precise instrument is low. Improvements are needed.

Disclosure of Invention

The utility model aims to provide a small angle measuring platform, which solves the problems in the prior art. The utility model meets the measurement precision required by detection, considers the working environments of moisture, rainwater, sand wind and the like, has small volume, light weight and portability, customizes interfaces and changes photoelectric components, can meet the use requirements of specific technical indexes of troops, and can also be applied to other civil fields meeting the conditions. The utility model relates to a two-dimensional angle measuring platform, which can realize the angle measurement of the movement of bearing components in 360 degrees and pitching +10 degrees to-90 degrees. The upper end of the platform is matched with an optical lens and a camera module for use. The platform is provided with a locking fine-tuning device, and under the unlocked state, the direction and the pitching direction of the platform are manually operated, so that a remote target can be quickly and roughly searched and positioned; and then the fine adjustment device is locked, and the directions of two dimensions are further adjusted through the fine adjustment knob, so that the accurate positioning of the remote target is realized. The platform is internally provided with an azimuth and pitching electronic encoder, and can acquire high-precision angle data. The platform is provided with a pitching fine adjustment compensation device, under the working condition of a large elevation angle, the situation that the fine adjustment device fails due to the large gravity component is responded, the compensation device can increase auxiliary reverse elasticity so as to realize bidirectional fine adjustment under the working condition of the elevation angle, and the elasticity is adjustable according to different load weights. The lower end of the platform is provided with a leveling mechanism which is matched with the level bubble to level the platform stably. The platform design has circular attenuator, when the every single move direction was not locked, slows down the speed that the carrier assembly has declined, prevents hard striking stopper.

The above object of the present invention is achieved by the following technical solutions:

the small angle measurement platform comprises an upper half part of the platform and a lower half part of the platform which are matched with each other, and angle measurement of the bearing component in 360-degree and pitching + 10-90-degree motion is realized; the lower half part of the platform is as follows: the leveling fixing cylinder 39 is fixedly connected with the leveling base 41, the leveling middle plate 42 is connected with the leveling fixing cylinder 39, the lower end of the leveling knob 43 is connected with the leveling middle plate 42, and the upper end of the leveling knob 43 is connected with the platform chassis 5; the encoder coded disc 37 is fixed on the encoder fixing cover 44, the encoder circuit board 36 is fixed on the bearing pressing plate 35, the encoder fixing cover 44 is fixed at the lower end of the platform chassis 5, the bearing pressing plate 35 is connected with the azimuth vertical shaft 31 and pressed on the inner ring of the bearing II 34, the outer ring of the bearing II 34 is fixed on the platform chassis 5 through the bearing pressing ring 45, the outer ring of the bearing I32 is fixed on the platform middle disc 6 through the bearing pressing ring 45, the inner ring of the bearing I32 is connected with the azimuth vertical shaft 31, the azimuth locking core 33 is slidably connected with the azimuth vertical shaft 31, the upper end face and the lower end face of the azimuth locking core 33 are respectively in sliding contact with the inner rings of the bearing I32 and the bearing II 34, the azimuth locking ring 16 is installed on the azimuth locking core 33, and the inner wall of the azimuth locking ring 16 is in sliding fit with the outer wall of the azimuth locking core 33.

The upper end face of the azimuth locking ring 16 is in sliding contact with the platform middle disc 6, a second thimble sleeve 20 is fixed on the platform middle disc 6, a second thimble adjusting knob 19, a second spring 18 and a second bulb thimble 17 are installed in the second thimble sleeve 20, one end of the second thimble 21 is in sliding contact with the inner wall of a conical groove on the azimuth locking ring 16, the other end of the second thimble passes through a hole on a second fine adjustment screw sleeve 24 and is in contact with the end face of one side of a second fine adjustment screw 22, and the second fine adjustment screw sleeve 24 is fixed on the platform middle disc 6 and is coaxial with the second thimble sleeve 20; the second fine adjustment screw 22 is in threaded fit with the second fine adjustment screw sleeve 24, one end of the second fine adjustment screw sleeve 24 is in contact with the second mandril 21, the other end of the second fine adjustment screw sleeve 24 is fixed with the second fine adjustment knob 23 and can synchronously rotate, and the azimuth fine adjustment locking knob 4 penetrates through a waist hole in the platform middle disc 6 and is installed on the azimuth locking ring 16.

One end of the second spring 18 is arranged in the groove of the second thimble adjusting knob 19, the other end of the second spring is arranged in the inner cavity of the second ball-head thimble 17, the ball head end of the second ball-head thimble 17 is in sliding contact with the inner wall of the conical groove on the direction locking ring 16, and the second ball-head thimble 17 slides when being pressed.

The upper half part of the platform is as follows: the azimuth vertical shaft 31, the horizontal bubble 7 and the pitching limiting block 3 are respectively fixed on the U-shaped frame 8, and an electronic gyroscope module 46 is arranged in the pitching limiting block 3; the damper 9 is installed on the side edge of the U-shaped frame 8, the T-shaped frame 2 is fixed in the middle of the U-shaped frame through the pitching transverse shaft 48 and can rotate around the shaft, the pitching limiting nail 47 is fixed on the U-shaped frame 8, the lower surface of the supporting plate 1 is fixedly connected with the upper surface of the T-shaped frame, the pitching locking core 10 is fixedly connected with the pitching transverse shaft 48 and can rotate synchronously, and the pitching locking ring 11 is installed on the pitching locking core 10.

The inner wall of the pitching locking ring 11 is in sliding fit with the outer wall of the pitching locking core 10, the pitching fine-tuning locking knob 29 passes through a waist hole on the U-shaped frame 8 and is arranged on the pitching locking ring 11, and a fine-tuning dustproof sheet 30 is arranged between the pitching locking ring 11 and the U-shaped frame 8; the lifting mechanism comprises a U-shaped frame 8, a top needle sleeve 13, a top needle adjusting knob 15, a spring 14 and a ball head top needle 12, wherein the top needle sleeve 13 is fixed on the U-shaped frame 8, the top needle adjusting knob 15, the spring 14 and the ball head top needle 12 are installed in the top needle sleeve 13, one end of a top rod 27 is in sliding contact with the inner wall of a conical groove in a pitching locking ring 11, the other end of the top rod 27 penetrates through a hole in a fine adjusting screw sleeve 28 to be in contact with one side end face of a fine adjusting screw 26, the fine adjusting screw sleeve 28 is fixed on the U-shaped frame 8 and coaxial with the top needle sleeve 13, the fine adjusting screw 26 is in threaded fit with the fine adjusting screw sleeve 28, one end of the fine adjusting screw sleeve 28 is in contact with the top rod 27, the other end of the fine adjusting knob 25 is fixed on the fine adjusting knob and can rotate synchronously, a back-up limiting block 49 is installed on a horizontal shaft connecting block 54, a top needle sleeve three 53 is fixed on the U-shaped frame 8, and a top needle adjusting knob 52, a spring three spring 51 and a ball head top needle 50 are installed in a top needle sleeve three 53.

One end of the first spring 14 is arranged in a groove of the thimble adjusting knob 15, the other end of the first spring is arranged in an inner cavity of the first ball head thimble 12, the ball head end of the first ball head thimble 12 is in sliding contact with the inner wall of the conical groove on the pitching locking ring 11, and the first ball head thimble 12 can slide in a certain range when being pressed.

One end of the third spring 51 is arranged in the groove of the third thimble adjusting knob 52, the other end of the third spring is arranged in the inner cavity of the third ball-head thimble 50, the ball-head end of the third ball-head thimble 50 is in sliding contact with the side wall of the backward limiting block 49 when the T-shaped frame tilts backward, the third ball-head thimble 50 can slide in a certain range when being pressed, and when the T-shaped frame tilts forward, the ball-head end of the third ball-head thimble 50 is separated from the backward limiting block 49.

The utility model has the beneficial effects that: the design is novel, the structure is stable, and the device is suitable for various complex environments; the operation is simple, and the measurement task can be completed quickly; small volume, light weight and convenient carrying for individual soldiers. The device can replace complex and expensive instruments such as theodolite or total station and the like to be used in specific environment; by adopting the high-precision electronic gyroscope and the electromagnetic encoder, the angle measurement result can be converted into an electric signal, and the measurement precision is improved compared with a mechanical dial. The practicability is strong.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model.

FIG. 1 is a schematic view of the external structure of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view B-B of FIG. 2;

fig. 5 is a cross-sectional view C-C of fig. 2.

In the figure: 1. a support plate; 2. a T-shaped frame; 3. a pitching limiting block; 4. an azimuth fine adjustment locking knob; 5. a platform chassis; 6. a platform middle plate; 7. horizontal bubble; 8. a U-shaped frame; 9. a damper; 10. a pitching locking core; 11. a pitching locking ring; 12. a ball head thimble I; 13. a thimble sleeve I; 14. a first spring; 15. a thimble adjusting knob I; 16. an azimuth locking ring; 17. a ball head thimble II; 18. a second spring; 19. a thimble adjusting knob II; 20. a second thimble sleeve; 21. a second ejector rod; 22. a second fine adjustment screw; 23. a second fine adjustment knob; 24. a second fine adjustment screw sleeve; 25. a first fine adjustment knob; 26. fine adjustment of a first screw; 27. a first ejector rod; 28. fine adjustment of a first threaded sleeve; 29. a pitching fine adjustment locking knob; 30. finely adjusting a dustproof sheet; 31. an azimuth vertical axis; 32. a first bearing; 33. an azimuth lock core; 34. a second bearing; 35. a bearing pressure plate; 36. an encoder circuit board; 37. a code disc of an encoder; 38. a first leveling locking ring; 39. leveling the fixed cylinder; 40. a second leveling locking ring; 41. leveling the base; 42. leveling the middle plate; 43. a leveling knob; 44. an encoder fixing cover; 45. bearing compression rings; 46. an electronic gyroscope module; 47. a pitching limiting nail; 48. a pitch lateral axis; 49. a backward leaning limit block; 50. a ball head thimble III; 51. a third spring; 52. a thimble adjusting knob III; 53. a thimble sleeve III; 54. and a horizontal shaft connecting block.

Detailed Description

The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.

Referring to fig. 1 to 5, the small angle measuring platform of the present invention is composed of an upper half and a lower half, and the lower half of the platform is combined as follows: the leveling fixing cylinder 39 is fixedly connected with a leveling base 41 through a leveling locking ring II 40, the leveling middle plate 42 is connected with the leveling fixing cylinder 39 through a leveling locking ring I38, the lower end of a leveling knob 43 is connected with the leveling middle plate 42, and the upper end of the leveling knob 43 is connected with the platform chassis 5; the encoder coded disc 37 is fixed on the encoder fixing cover 44, the encoder circuit board 36 is fixed on the bearing pressing plate 35, the encoder fixing cover 44 is fixed at the lower end of the platform chassis 5, the bearing pressing plate 35 is connected with the azimuth vertical shaft 31 and pressed on the inner ring of the bearing II 34, the outer ring of the bearing II 34 is fixed on the platform chassis 5 through the bearing pressing ring 45, the outer ring of the bearing I32 is fixed on the platform middle disc 6 through the bearing pressing ring 45, the inner ring of the bearing I32 is connected with the azimuth vertical shaft 31, the azimuth locking core 33 is slidably connected with the azimuth vertical shaft 31, the upper end face and the lower end face of the azimuth locking core 33 are respectively in sliding contact with the inner rings of the bearing I32 and the bearing II 34, the azimuth locking ring 16 is installed on the azimuth locking core 33, and the inner wall of the azimuth locking ring 16 is in sliding fit with the outer wall of the azimuth locking core 33.

The upper end face of the azimuth locking ring 16 is in sliding contact with the platform middle disc 6, a second thimble sleeve 20 is fixed on the platform middle disc 6, a second thimble adjusting knob 19, a second spring 18 and a second bulb thimble 17 are installed in the second thimble sleeve 20, one end of the second spring 18 is arranged in a groove of the second thimble adjusting knob 19, the other end of the second spring is arranged in an inner cavity of the second bulb thimble 17, the ball head end of the second bulb thimble 17 is in sliding contact with the inner wall of a conical groove on the azimuth locking ring 16, and the second bulb thimble 17 can slide in a certain range when being pressed; one end of the second ejector rod 21 is in sliding contact with the inner wall of the conical groove in the azimuth locking ring 16, the other end of the second ejector rod passes through a hole in the second fine adjustment screw sleeve 24 to be in contact with one side end face of the second fine adjustment screw 22, the second fine adjustment screw sleeve 24 is fixed on the platform middle disc 6 and is coaxial with the second ejector rod sleeve 20, the second fine adjustment screw 22 is in threaded fit with the second fine adjustment screw sleeve 24, one end of the second fine adjustment screw sleeve 24 is in contact with the second ejector rod 21, the other end of the second fine adjustment screw sleeve is fixed with the second fine adjustment knob 23 and can rotate synchronously, and the azimuth fine adjustment locking knob 4 passes through a waist hole in the platform middle disc 6 and is installed on the azimuth locking ring 16.

Combined description of the upper half of the platform: the vertical azimuth shaft 31 is fixed at the bottom of the U-shaped frame 8 through a screw and keeps rotating synchronously, the horizontal bubble 7 is installed on the U-shaped frame 8, the lower surface of the pitching limiting block 3 is fixed at the bottom of the middle of the U-shaped frame 8, the electronic gyroscope module 46 is installed inside the pitching limiting block 3, the damper 9 is installed at the side edge of the U-shaped frame 8, the T-shaped frame 2 is fixed at the middle position of the U-shaped frame through the pitching transverse shaft 48 and can rotate around the shaft, the pitching limiting nail 47 is fixed on the U-shaped frame 8, the lower surface of the supporting plate 1 is fixedly connected with the upper surface of the T-shaped frame, the pitching locking core 10 is fixedly connected with the pitching transverse shaft 48 and can rotate synchronously, the pitching locking ring 11 is installed on the pitching locking core 10, the inner wall of the pitching locking ring 11 is in sliding fit with the outer wall of the pitching locking core 10, the pitching fine-tuning locking knob 29 passes through a waist hole in the U-shaped frame 8 and is installed on the pitching locking ring 11, and the fine-tuning dustproof sheet 30 is installed between the pitching locking ring 11 and the U-shaped frame 8; a thimble sleeve I13 is fixed on a U-shaped frame 8, a thimble adjusting knob I15, a spring I14 and a ball head thimble I12 are arranged in the thimble sleeve I13, one end of the spring I14 is arranged in a groove of the thimble adjusting knob I15, the other end is arranged in an inner cavity of the ball head thimble I12, the ball head end of the ball head thimble I12 is in sliding contact with the inner wall of a conical groove on a pitching locking ring 11, the ball head thimble I12 can slide in a certain range when being pressed, one end of a thimble I27 is in sliding contact with the inner wall of the conical groove on the pitching locking ring 11, the other end passes through a hole on a fine adjustment screw sleeve I28 to be in contact with one side end face of a fine adjustment screw I26, the fine adjustment screw sleeve I28 is fixed on the U-shaped frame 8 and is coaxial with the thimble sleeve I13, the fine adjustment screw I26 is in threaded fit with the fine adjustment screw sleeve I28, one end of the fine adjustment screw sleeve I28 is in contact with the thimble I27, the other end is fixed with the fine adjustment knob I25 and can synchronously rotate, the back-bending limiting block 49 is mounted on the horizontal shaft connecting block 54, the thimble sleeve III 53 is fixed on the U-shaped frame 8, the thimble adjusting knob III 52, the spring III 51 and the ball head thimble III 50 are mounted in the thimble sleeve III 53, one end of the spring III 51 is arranged in a groove of the thimble adjusting knob III 52, the other end of the spring III is arranged in an inner cavity of the ball head thimble III 50, the ball head end of the ball head thimble III 50 is in sliding contact with the side wall of the back-bending limiting block 49 when the T-shaped frame is bent backwards, the ball head thimble III 50 can slide in a certain range when being pressed, and when the T-shaped frame is bent forwards, the ball head end of the ball head thimble III 50 is separated from the back-bending limiting block 49.

Referring to fig. 1 to 5, the working process of the present invention is as follows:

first, leveling. Placing the platform on a station, manually rotating three leveling knobs 43 positioned below the platform, and observing the horizontal bubble 7 in a matched manner to enable the bubble in the horizontal bubble 7 to be in a central position so as to finish leveling operation;

and step two, coarse adjustment. Loosening the azimuth fine-adjustment locking knob 4 and the pitching fine-adjustment locking knob 29, enabling the azimuth and the pitching direction of the platform to rotate freely, and then quickly adjusting the direction of the rotary table according to the position of the target to enable the target to be approximately in an observable area;

and thirdly, fine adjustment. The azimuth fine adjustment locking knob 4 and the pitching fine adjustment locking knob 29 are respectively screwed, and the azimuth and the pitching direction of the platform are locked and cannot move freely; the second fine adjustment knob 23 and the first fine adjustment knob 25 are respectively rotated, so that the angles of the azimuth direction and the pitching direction can be precisely adjusted, the target is further adjusted to the optimal measurement position, and at the moment, the encoder module (the encoder circuit board 36 and the encoder coded disc 37) and the electronic gyroscope module 46 record the initial position of the target;

and fourthly, measuring the movement of the target. After the target is located to a certain position, the target is locked again according to the method of the first step to the third step, and at this time, the absolute rotation angle recorded by the encoder module (the encoder circuit board 36 and the encoder code disc 37) and the electronic gyroscope module 46 is the required measurement value.

The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like of the present invention shall be included in the protection scope of the present invention.

Claims

1. A small-size angle measuring platform which characterized in that: the device comprises an upper half part of a platform and a lower half part of the platform which are matched with each other, and angle measurement of the movement of the bearing assembly from 360 degrees in azimuth and from +10 degrees to-90 degrees in pitch is realized; the lower half part of the platform is as follows: the leveling fixing cylinder (39) is fixedly connected with the leveling base (41), the leveling middle plate (42) is connected with the leveling fixing cylinder (39), the lower end of the leveling knob (43) is connected with the leveling middle plate (42), and the upper end of the leveling knob (43) is connected with the platform chassis (5); an encoder coded disc (37) is fixed on an encoder fixing cover (44), an encoder circuit board (36) is fixed on a bearing pressing plate (35), the encoder fixing cover (44) is fixed at the lower end of a platform chassis (5), the bearing pressing plate (35) is connected with an azimuth vertical shaft (31) and pressed on an inner ring of a bearing II (34), an outer ring of the bearing II (34) is fixed on the platform chassis (5) through a bearing pressing ring (45), an outer ring of the bearing I (32) is fixed on a platform middle disc (6) through the bearing pressing ring (45), the inner ring of the bearing I (32) is connected with the azimuth vertical shaft (31), an azimuth locking core (33) is connected with the azimuth vertical shaft (31) in a sliding manner, and the azimuth locking core (33) is arranged on the azimuth locking core, the lower end face of the bearing is in sliding contact with inner rings of the bearing I (32) and the bearing II (34) respectively, the azimuth locking ring (16) is installed on the azimuth locking core (33), and the inner wall of the azimuth locking ring (16) is in sliding fit with the outer wall of the azimuth locking core (33).

2. The compact angle measurement platform of claim 1, wherein: the upper end face of the azimuth locking ring (16) is in sliding contact with the platform middle disc (6), a second ejector pin sleeve (20) is fixed on the platform middle disc (6), a second ejector pin adjusting knob (19), a second spring (18) and a second ball-head ejector pin (17) are installed in the second ejector pin sleeve (20), one end of the second ejector pin sleeve (21) is in sliding contact with the inner wall of a conical groove in the azimuth locking ring (16), the other end of the second ejector pin sleeve penetrates through a hole in the second fine adjustment screw sleeve (24) to be in contact with the end face of one side of the second fine adjustment screw (22), and the second fine adjustment screw sleeve (24) is fixed on the platform middle disc (6) and is coaxial with the second ejector pin sleeve (20); the second fine adjustment screw (22) is in threaded fit with the second fine adjustment screw sleeve (24), one end of the second fine adjustment screw sleeve (24) is in contact with the second ejector rod (21), the other end of the second fine adjustment screw sleeve is fixed with the second fine adjustment knob (23) and can rotate synchronously, and the azimuth fine adjustment locking knob (4) penetrates through a waist hole in the platform middle disc (6) and is installed on the azimuth locking ring (16).

3. The compact angle measurement platform of claim 2, wherein: one end of the second spring (18) is arranged in the groove of the second thimble adjusting knob (19), the other end of the second spring is arranged in the inner cavity of the second bulb thimble (17), the bulb end of the second bulb thimble (17) is in sliding contact with the inner wall of the conical groove on the direction locking ring (16), and the second bulb thimble (17) slides when being pressed.

4. The compact angle measurement platform of claim 1, wherein: the upper half part of the platform is as follows: the azimuth vertical shaft (31), the horizontal bubble (7) and the pitching limiting block (3) are respectively fixed on the U-shaped frame (8), and an electronic gyroscope module (46) is arranged in the pitching limiting block (3); the damper (9) is installed on the side edge of the U-shaped frame (8), the T-shaped frame (2) is fixed in the middle of the U-shaped frame through the pitching transverse shaft (48) and can rotate around a shaft, the pitching limiting nail (47) is fixed on the U-shaped frame (8), the lower surface of the supporting plate (1) is fixedly connected with the upper surface of the T-shaped frame, the pitching locking core (10) is fixedly connected with the pitching transverse shaft (48) and can rotate synchronously, and the pitching locking ring (11) is installed on the pitching locking core (10).

5. The compact angle measurement platform of claim 4, wherein: the inner wall of the pitching locking ring (11) is in sliding fit with the outer wall of the pitching locking core (10), a pitching fine-adjustment locking knob (29) passes through a waist hole in the U-shaped frame (8) and is arranged on the pitching locking ring (11), and a fine-adjustment dustproof sheet (30) is arranged between the pitching locking ring (11) and the U-shaped frame (8); a thimble sleeve I (13) is fixed on a U-shaped frame (8), a thimble adjusting knob I (15), a spring I (14) and a ball head thimble I (12) are arranged in the thimble sleeve I (13), one end of the thimble I (27) is in sliding contact with the inner wall of a conical groove on the pitching locking ring (11), the other end of the thimble I passes through a hole on a fine adjustment screw sleeve I (28) and is in contact with one side end face of a fine adjustment screw I (26), the fine adjustment screw sleeve I (28) is fixed on the U-shaped frame (8) and is coaxial with the thimble sleeve I (13), the fine adjustment screw I (26) is in threaded fit with the fine adjustment screw sleeve I (28), one end of the fine adjustment screw sleeve I (28) is in contact with the thimble I (27), the other end of the fine adjustment screw sleeve I (25) is fixed and can synchronously rotate, a backward bending limiting block (49) is arranged on a horizontal shaft connecting block (54), a thimble sleeve III (53) is fixed on the U-shaped frame (8), and a thimble adjusting knob III (52), And a spring III (51) and a ball head thimble III (50) are arranged in the thimble sleeve III (53).

6. The compact angle measurement platform of claim 5, wherein: one end of the first spring (14) is arranged in the groove of the first thimble adjusting knob (15), the other end of the first spring is arranged in the inner cavity of the first bulb thimble (12), the bulb end of the first bulb thimble (12) is in sliding contact with the inner wall of the conical groove on the pitching locking ring (11), and the first bulb thimble (12) can slide when being pressed.

7. The compact angle measurement platform of claim 5, wherein: one end of a third spring (51) is arranged in a groove of the third thimble adjusting knob (52), the other end of the third spring is arranged in an inner cavity of the third ball-head thimble (50), the ball-head end of the third ball-head thimble (50) is in sliding contact with the side wall of the backward limiting block (49) when the T-shaped frame is tilted backwards, the third ball-head thimble (50) can slide when being pressed, and when the T-shaped frame is tilted forwards, the ball-head end of the third ball-head thimble (50) is separated from the backward limiting block (49).