A remote zero adjustment system for a metal zero-length spring relative gravimeter

Abstract

A remote zero adjustment system for a metal zero-length spring relative gravimeter, comprising a spring fixing cylinder, a zero adjustment large gear, a zero adjustment small gear, an upper cover plate, a bracket, a lower cover plate and a zero adjustment motor; a zero adjustment motor is installed at the bottom of the upper cover plate, the zero adjustment motor is signal-connected to a remote terminal, an output shaft of the zero adjustment motor is connected to the zero adjustment small gear, the zero adjustment small gear meshes with the zero adjustment large gear, an inner ring of the zero adjustment large gear is threadedly connected to the spring fixing cylinder, and a metal zero-length spring is arranged inside the spring fixing cylinder; the top of the bracket is connected to the bottom of the upper cover plate, the bottom of the bracket is connected to the top of the lower cover plate, a connection groove is formed at the top of the upper cover plate, an annular first gear limiting piece and a second gear limiting piece are sequentially installed at the top and bottom of the upper cover plate, and the first gear limiting piece and the second gear limiting piece are in contact with the zero adjustment large gear. The invention can timely perform zero adjustment on the metal zero-length spring under the condition of unattended operation in the wild.

Description

Technical Field

[0001] The present invention relates to an improvement in the zeroing technology of a metal zero-length spring, belonging to the field of terrestrial gravity, and particularly relates to a remote zeroing system for a metal zero-length spring relative gravimeter. Background Art

[0002] Terrestrial gravity is an important physical quantity in disciplines such as geodesy, geophysics, and metrology. Its magnitude is mainly affected by the Earth's structure and shape; the metal zero-length spring relative gravimeter can play an important role in disciplines such as geophysics and metrology, as well as in national defense security. Since the static gravimeter has a high precision, which can reach an accuracy better than 1 μGal, many useful information can be extracted from the observed gravity values. The metal zero-length spring gravimeter is a precision instrument that uses the elastic properties of a metal zero-length spring to accurately measure the change in the acceleration of gravity of the Earth's gravity field. The most important part of the sensor is the metal zero-length spring core. Its precision and sensitivity are very high, and it is also very sensitive. After the gravimeter is transported to a new observation location, the change in the gravity field will cause the length of the metal zero-length spring to change. When the output change of the gravimeter is too large, there is a risk of exceeding the observable range. In addition, the metal zero-length spring will exhibit a creep effect, that is, when the mass of the suspended object remains unchanged, the length of the spring will slowly increase over time. That is to say, the observed data of the gravimeter will slowly deviate from the zero position over time until it exceeds the observable range.

[0003] The zeroing operation refers to adjusting the mass pendulum suspended by the metal zero-length spring back to the initial position, that is, the zero position, through means such as mechanical transmission. When the mass pendulum deviates from the zero position or even exceeds the range, it will seriously affect the data quality of the gravimeter; if the metal zero-length spring cannot be adjusted back to the zero position by means of zeroing, it will lead to the situation that the gravimeter cannot observe effective data. Traditional metal zero-length spring gravimeters all use a pure mechanical structure for zeroing, and a professional manually rotates the adjustment pendulum rod to adjust the pendulum position. This structure is relatively simple but has a single function. When observing at a gravity observation station with a stable environment and professional personnel on duty, this zeroing structure can meet the requirements of the gravimeter. However, in the wild where the environmental conditions are relatively harsh and there is no dedicated person to guard, after the data of the gravimeter exceeds the range, it cannot be adjusted back to the zero position in time and cannot work properly.

[0004] The Chinese patent application with the application number CN201611028096.8 and the filing date of November 15, 2016 discloses a zero-length spring, a zero-length spring connection structure and a dynamic gravimeter. The zero-length spring includes a deformation region and a straight region. The straight regions are arranged at both ends of the deformation region. The deformation region and the straight regions are integrally formed by a metal wire. The connection points between the deformation region and the straight regions are located on the axis of the deformation region, and the axes of the straight regions coincide with the axis of the deformation region. The ends of the zero-length spring cancel the structure of the traditional bent hook and suspension wire cooperation, and directly prepare straight regions at both ends of the spring, so that the connection components of the dynamic gravimeter can directly clamp the zero-length spring like clamping a suspension wire. The connection structure of the zero-length spring and the dynamic gravimeter applying the zero-length spring are also disclosed. The above technologies enable the dynamic gravimeter to relax the positioning accuracy, reduce the assembly difficulty and simplify the assembly process, but do not solve the problem of timely zeroing the metal zero-length spring in the case of unattended operation in the wild.

[0005] Disclosing the information of this background art section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The object of the present invention is to overcome the problem of timely zeroing the metal zero-length spring in the case of unattended operation in the wild in the prior art, and provide a remote zeroing system for a metal zero-length spring relative gravimeter that can timely zero the metal zero-length spring in the case of unattended operation in the wild.

[0007] To achieve the above object, the technical solution of the present invention is: A remote zeroing system for a metal zero-length spring relative gravimeter, the remote zeroing system for a metal zero-length spring relative gravimeter includes a spring fixing cylinder, a zeroing large gear, a zeroing small gear, an upper cover plate, a bracket, a lower cover plate and a zeroing motor;

[0008] A zeroing motor is installed at the bottom of the upper cover plate. The zeroing motor is signal-connected to a remote terminal. The output shaft of the zeroing motor is connected to the zeroing small gear. The zeroing small gear meshes with the zeroing large gear. The inner ring of the zeroing large gear is threadedly connected to the spring fixing cylinder. The metal zero-length spring is arranged in the spring fixing cylinder;

[0009] The top of the bracket is connected to the bottom of the upper cover plate, and the bottom of the bracket is connected to the top of the lower cover plate. A connection groove is provided at the top of the upper cover plate. An annular first gear limiting piece and a second gear limiting piece are sequentially installed at the top and bottom of the upper cover plate. The first gear limiting piece and the second gear limiting piece are in contact with the zeroing large gear, and the zeroing large gear rotates along the connection groove;

[0010] A through hole is formed at the bottom of the lower cover plate, and the lower end of the metal zero-length spring penetrates through the through hole.

[0011] The zero-adjustment large gear includes a large gear at the upper end, a connecting ring in the middle, and a rotating ring at the lower end. The bottom of the large gear is connected to the top of the connecting ring, and the bottom of the connecting ring is connected to the top of the rotating ring;

[0012] The external teeth of the large gear mesh with the zero-adjustment small gear. The rotating ring is in rotational fit with the connecting groove. The first gear limiting piece is arranged between the rotating ring and the connecting ring, and the top of the second gear limiting piece contacts the bottom of the rotating ring.

[0013] The first gear limiting piece and the second gear limiting piece have the same diameter, and the outer diameter of the first gear limiting piece is larger than the outer diameter of the rotating ring.

[0014] The zero-adjustment small gear includes a thick shaft, a thin shaft and a small gear. The bottom of the thin shaft is connected to the top of the thick shaft. The bottom of the thick shaft is connected to the output shaft of the zero-adjustment motor. A small gear is sleeved on the outer circumference of the thick shaft, and the small gear meshes with the large gear.

[0015] A small gear fixing bracket is arranged at the top of the upper cover plate. The top of the thin shaft penetrates through the small gear fixing bracket and is rotatably connected to the small gear fixing bracket.

[0016] The spring fixing cylinder includes a lower cylinder body and an upper cylinder body. The top of the lower cylinder body is connected to the bottom of the upper cylinder body. A fixing column is arranged in the inner cavity of the upper cylinder body. The bottom of the fixing column is connected to the top of the clip assembly. The bottom of the clip assembly is connected to the top of the metal zero-length spring.

[0017] External threads are arranged on the outer circumferences of the lower cylinder body and the upper cylinder body. Internal threads are arranged on the inner wall of the zero-adjustment large gear. The external threads are in threaded fit with the internal threads.

[0018] A screw ring is arranged in the inner cavity of the upper cylinder body. The inner side of the screw ring is connected to the outer side of the fixing column, and the outer side of the screw ring contacts the inner wall of the inner cavity;

[0019] A limiting ring is arranged on the bottom wall of the inner cavity. The bottom of the screw ring is connected to the top of the limiting ring.

[0020] The clip assembly includes an upper connecting plate and a lower connecting plate, and the upper connecting plate and the lower connecting plate are connected by a suspension wire;

[0021] The top of the upper connecting plate is connected to the bottom of the fixing column. The left side of the bottom of the upper connecting plate is connected to the top of the upper vertical plate. The right side of the upper vertical plate is connected to the left side of the upper clamping plate. The top of the upper clamping plate contacts the bottom of the upper connecting plate;

[0022] The bottom of the lower connecting plate is connected to the top of the metal zero-length spring. The top of the lower connecting plate is connected to the bottom of the lower vertical plate. The right side of the lower vertical plate is connected to the left side of the lower clamping plate. The bottom of the lower clamping plate contacts the top of the lower connecting plate.

[0023] There is a gap between the upper connecting plate and the lower connecting plate. The upper vertical plate and the upper clamping plate are connected by two fixing bolts. The lower vertical plate and the lower clamping plate are connected by two fixing bolts. The suspension wire is arranged between the two fixing bolts.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. In a remote zero-adjustment system of a metal zero-length spring relative to a gravimeter according to the present invention, a zero-adjustment motor is installed at the bottom of the upper cover plate. The zero-adjustment motor is signal-connected to a remote terminal. The output shaft of the zero-adjustment motor is connected to a zero-adjustment pinion. The zero-adjustment pinion meshes with a zero-adjustment gear. The inner ring of the zero-adjustment gear is threadedly connected to a spring fixing cylinder. The metal zero-length spring is arranged inside the spring fixing cylinder. During application, the control terminal inputs a zero-adjustment instruction to the zero-adjustment motor, controls the zero-adjustment motor to rotate counterclockwise / clockwise. When the zero-adjustment motor rotates, it drives the zero-adjustment pinion to rotate, thereby driving the zero-adjustment gear to rotate. When the zero-adjustment gear rotates clockwise, the spring fixing cylinder moves upward through threaded transmission, causing the metal zero-length spring to move upward. When the zero-adjustment gear rotates counterclockwise, the spring fixing cylinder moves downward through threaded transmission, causing the metal zero-length spring to move downward. Thus, in the case of unattended operation in the wild, the metal zero-length spring can be zero-adjusted in a timely manner, and the adjustment is more convenient and rapid. Therefore, in the case of unattended operation in the wild, the metal zero-length spring of the present invention can be zero-adjusted in a timely manner.

[0026] 2. In a remote zero-adjustment system of a metal zero-length spring relative to a gravimeter according to the present invention, the outer teeth of the large gear mesh with the zero-adjustment pinion. The rotating ring is rotationally matched with the connecting groove. The first gear limiting piece is arranged between the rotating ring and the connecting ring. The top of the second gear limiting piece contacts the bottom of the rotating ring. During application, the lower end of the zero-adjustment gear is slidably matched with the central circular groove of the upper cover plate. The protruding connecting ring is blocked by the first gear limiting piece and the second gear limiting piece fixed on the lower cover plate, so that the zero-adjustment gear can rotate and will not fall off the upper cover plate. Therefore, the present invention is safe to use and stable in operation.

[0027] 3. In the remote zeroing system of a metal zero-length spring relative to a gravimeter according to the present invention, the spring fixing cylinder includes a lower cylinder body and an upper cylinder body. The top of the lower cylinder body is connected to the bottom of the upper cylinder body. A fixing column is arranged in the inner cavity of the upper cylinder body. The bottom of the fixing column is connected to the top of the clip assembly, and the bottom of the clip assembly is connected to the top of the metal zero-length spring. During application, the fixing column is fixed through the setting of the limit ring and the screw ring, and then the fixing column is used to fix the metal zero-length spring. Then, the external thread on the outside of the spring fixing cylinder can be adjusted up and down as the zeroing large gear rotates. Therefore, the present invention is simple to fix and convenient to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the present invention.

[0029] Figure 2 is a schematic connection diagram of the zeroing large gear and the zeroing small gear in the present invention.

[0030] Figure 3 is a schematic connection diagram of the spring fixing cylinder and the zeroing large gear in the present invention.

[0031] Figure 4 is a schematic structural diagram of the spring fixing cylinder in the present invention.

[0032] Figure 5 is a schematic structural diagram of the clip assembly in the present invention.

[0033] In the figure: spring fixing cylinder 1, lower cylinder body 11, upper cylinder body 12, fixing column 13, screw ring 14, clip assembly 15, upper connecting plate 151, upper vertical plate 152, upper clamping plate 153, suspension wire 154, lower connecting plate 155, lower vertical plate 156, lower clamping plate 157, limit ring 16, inner cavity 17, zeroing large gear 2, zeroing small gear 3, first gear limiting piece 41, second gear limiting piece 42, small gear fixing frame 5, upper cover plate 6, support 7, lower cover plate 8, zeroing motor 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0035] See Figures 1 to 5 , a remote zeroing system of a metal zero-length spring relative to a gravimeter. The remote zeroing system of the metal zero-length spring relative to the gravimeter includes a spring fixing cylinder 1, a zeroing large gear 2, a zeroing small gear 3, an upper cover plate 6, a support 7, a lower cover plate 8 and a zeroing motor 9;

[0036] A zeroing motor 9 is installed at the bottom of the upper cover plate 6. The zeroing motor 9 is signal-connected to a remote terminal. The output shaft of the zeroing motor 9 is connected to a zeroing pinion 3. The zeroing pinion 3 meshes with a zeroing gear 2. The inner ring of the zeroing gear 2 is threadedly connected to a spring fixing cylinder 1. A metal zero-length spring 10 is arranged inside the spring fixing cylinder 1;

[0037] The top of the bracket 7 is connected to the bottom of the upper cover plate 6, and the bottom of the bracket 7 is connected to the top of the lower cover plate 8. A connecting groove 61 is formed at the top of the upper cover plate 6. An annular first gear limiting piece 41 and a second gear limiting piece 42 are sequentially installed at the top and bottom of the upper cover plate 6. The first gear limiting piece 41 and the second gear limiting piece 42 are in contact with the zeroing gear 2. The zeroing gear 2 rotates along the connecting groove 61;

[0038] A through hole 81 is formed at the bottom of the lower cover plate 8. The lower end of the metal zero-length spring 10 penetrates through the through hole 81 and is arranged.

[0039] The zeroing gear 2 includes a large gear 21 at the upper end, a connecting ring 23 in the middle, and a rotating ring 22 at the lower end. The bottom of the large gear 21 is connected to the top of the connecting ring 23, and the bottom of the connecting ring 23 is connected to the top of the rotating ring 22;

[0040] The external teeth of the large gear 21 mesh with the zeroing pinion 3. The rotating ring 22 is in rotational cooperation with the connecting groove 61. The first gear limiting piece 41 is arranged between the rotating ring 22 and the connecting ring 23. The top of the second gear limiting piece 42 is in contact with the bottom of the rotating ring 22.

[0041] The first gear limiting piece 41 and the second gear limiting piece 42 have the same diameter, and the outer diameter of the first gear limiting piece 41 is larger than the outer diameter of the rotating ring 22.

[0042] The zeroing pinion 3 includes a thick shaft 31, a thin shaft 32, and a pinion 33. The bottom of the thin shaft 32 is connected to the top of the thick shaft 31. The bottom of the thick shaft 31 is connected to the output shaft of the zeroing motor 9. A pinion 33 is sleeved on the outer periphery of the thick shaft 31. The pinion 33 meshes with the large gear 21.

[0043] A pinion fixing bracket 5 is arranged at the top of the upper cover plate 6. The top of the thin shaft 32 penetrates through the pinion fixing bracket 5 and is rotatably connected to the pinion fixing bracket 5.

[0044] The spring fixing cylinder 1 includes a lower cylinder body 11 and an upper cylinder body 12. The top of the lower cylinder body 11 is connected to the bottom of the upper cylinder body 12. A fixing column 13 is arranged in the inner cavity 17 of the upper cylinder body 12. The bottom of the fixing column 13 is connected to the top of a clip assembly 15. The bottom of the clip assembly 15 is connected to the top of the metal zero-length spring 10.

[0045] The outer circumferences of the lower cylinder body 11 and the upper cylinder body 12 are provided with external threads, and the inner wall of the zero-adjustment large gear 2 is provided with internal threads, and the external threads are in threaded fit with the internal threads.

[0046] A spiral ring 14 is arranged in the inner cavity 17 of the upper cylinder body 12. The inner side of the spiral ring 14 is connected to the outer side of the fixed column 13, and the outer side of the spiral ring 14 is in contact with the inner wall of the inner cavity 17;

[0047] A limiting ring 16 is arranged on the bottom wall of the inner cavity 17, and the bottom of the spiral ring 14 is connected to the top of the limiting ring 16.

[0048] The clip assembly 15 includes an upper connecting plate 151 and a lower connecting plate 155, and the upper connecting plate 151 and the lower connecting plate 155 are connected by a suspension wire 154;

[0049] The top of the upper connecting plate 151 is connected to the bottom of the fixed column 13. The bottom left side of the upper connecting plate 151 is connected to the top of the upper vertical plate 152. The right side of the upper vertical plate 152 is connected to the left side of the upper clamping plate 153, and the top of the upper clamping plate 153 is in contact with the bottom of the upper connecting plate 151;

[0050] The bottom of the lower connecting plate 155 is connected to the top of the metal zero-length spring 10. The top of the lower connecting plate 155 is connected to the bottom of the lower vertical plate 156. The right side of the lower vertical plate 156 is connected to the left side of the lower clamping plate 157, and the bottom of the lower clamping plate 157 is in contact with the top of the lower connecting plate 155.

[0051] There is a gap between the upper connecting plate 151 and the lower connecting plate 155. The upper vertical plate 152 and the upper clamping plate 153 are connected by two fixing bolts, and the lower vertical plate 156 and the lower clamping plate 157 are connected by two fixing bolts. The suspension wire 154 is arranged between the two fixing bolts.

[0052] The supplementary description of the present invention is as follows:

[0053] When the first gear limiting piece 41 and the second gear limiting piece 42 are fixed on the upper cover plate 6, the screw tightness should be adjusted according to the rotation effect of the zero-adjustment large gear 2. If the zero-adjustment large gear 2 rotates smoothly, adjust the tightness of the first gear limiting piece 41 and the second gear limiting piece 42 until the zero-adjustment large gear 2 rotates smoothly.

[0054] Example 1:

[0055] A remote zero-adjustment system for a metal zero-length spring relative gravimeter. The remote zero-adjustment system for the metal zero-length spring relative gravimeter includes a spring fixing cylinder 1, a zero-adjustment large gear 2, a zero-adjustment small gear 3, an upper cover plate 6, a bracket 7, a lower cover plate 8, and a zero-adjustment motor 9. A zero-adjustment motor 9 is installed at the bottom of the upper cover plate 6. The output shaft of the zero-adjustment motor 9 is connected to the zero-adjustment small gear 3. The zero-adjustment small gear 3 meshes with the zero-adjustment large gear 2. The inner ring of the zero-adjustment large gear 2 is threadedly connected to the spring fixing cylinder 1. A metal zero-length spring 10 is arranged inside the spring fixing cylinder 1. The top of the bracket 7 is connected to the bottom of the upper cover plate 6, and the bottom of the bracket 7 is connected to the top of the lower cover plate 8. A connection groove 61 is formed at the top of the upper cover plate 6. An annular first gear limiting piece 41 and a second gear limiting piece 42 are sequentially installed at the top and bottom of the upper cover plate 6. The first gear limiting piece 41 and the second gear limiting piece 42 are in contact with the zero-adjustment large gear 2, and the zero-adjustment large gear 2 rotates along the connection groove 61. A through hole 81 is formed at the bottom of the lower cover plate 8, and the lower end of the metal zero-length spring 10 passes through the through hole 81.

[0056] During application: The zero adjustment is an operation of moving the spring in the metal zero-length spring gravimeter forward or backward.

[0057] Forward zero adjustment is as follows: The zero-adjustment control system inputs a forward zero-adjustment instruction to the zero-adjustment motor 9, controls the zero-adjustment motor 9 to rotate counterclockwise. The counterclockwise rotation of the zero-adjustment motor 9 drives the zero-adjustment small gear 3 to rotate counterclockwise, thereby driving the zero-adjustment large gear 2 to rotate clockwise. The clockwise rotation of the zero-adjustment large gear 2 causes the spring fixing cylinder 1 to move upward through threaded transmission, and the metal zero-length spring 10 moves upward.

[0058] Reverse zero adjustment is as follows: The zero-adjustment control system inputs a reverse zero-adjustment instruction to the zero-adjustment motor 9, controls the zero-adjustment motor 9 to rotate clockwise. The clockwise rotation of the zero-adjustment motor 9 drives the zero-adjustment small gear 3 to rotate clockwise, thereby driving the zero-adjustment large gear 2 to rotate counterclockwise. The counterclockwise rotation of the zero-adjustment large gear 2 causes the spring fixing cylinder 1 to move downward through threaded transmission, and the metal zero-length spring 10 moves downward.

[0059] Embodiment 2:

[0060] Embodiment 2 is basically the same as Embodiment 1, and the difference lies in:

[0061] The zero-adjusting large gear 2 includes a large gear 21 at the upper end, a connecting ring 23 in the middle, and a rotating ring 22 at the lower end. The bottom of the large gear 21 is connected to the top of the connecting ring 23, and the bottom of the connecting ring 23 is connected to the top of the rotating ring 22. The external teeth of the large gear 21 mesh with the zero-adjusting small gear 3. The rotating ring 22 is rotationally matched with the connecting groove 61. The first gear limiting piece 41 is arranged between the rotating ring 22 and the connecting ring 23, and the top of the second gear limiting piece 42 contacts the bottom of the rotating ring 22. The first gear limiting piece 41 and the second gear limiting piece 42 have the same diameter, and the outer diameter of the first gear limiting piece 41 is larger than the outer diameter of the rotating ring 22. The zero-adjusting small gear 3 includes a thick shaft 31, a thin shaft 32, and a small gear 33. The bottom of the thin shaft 32 is connected to the top of the thick shaft 31. The bottom of the thick shaft 31 is connected to the output shaft of the zero-adjusting motor 9. A small gear 33 is sleeved on the outer circumference of the thick shaft 31, and the small gear 33 meshes with the large gear 21. A small gear fixing frame 5 is arranged on the top of the upper cover plate 6, and the top of the thin shaft 32 passes through the small gear fixing frame 5 and is rotationally connected with the small gear fixing frame 5.

[0062] During application: The lower end of the zero-adjusting large gear 2 is in sliding fit with the central circular groove of the upper cover plate 6. The first gear limiting piece 41 and the second gear limiting piece 42 fixed on the lower cover plate 8 block the protrusion of the connecting ring 23, so that the zero-adjusting large gear 2 can rotate and will not fall off from the upper cover plate 6. The lower end of the zero-adjusting small gear 3 is in sliding fit with the hole on the upper cover plate 6. The zero-adjusting small gear 3 is in transmission with the zero-adjusting large gear 2, and the transmission ratio is 1:10.

[0063] Embodiment 3:

[0064] Embodiment 3 is basically the same as Embodiment 1, and the difference lies in:

[0065] The spring fixing cylinder 1 includes a lower cylinder body 11 and an upper cylinder body 12. The top of the lower cylinder body 11 is connected to the bottom of the upper cylinder body 12. A fixing column 13 is arranged in the inner cavity 17 of the upper cylinder body 12. The bottom of the fixing column 13 is connected to the top of the clip assembly 15. The bottom of the clip assembly 15 is connected to the top of the metal zero-length spring 10. External threads are arranged on the outer circumferences of the lower cylinder body 11 and the upper cylinder body 12, and internal threads are arranged on the inner wall of the zero-adjusting large gear 2. The external threads are in threaded fit with the internal threads. A screw ring 14 is arranged in the inner cavity 17 of the upper cylinder body 12. The inner side of the screw ring 14 is connected to the outer side of the fixing column 13, and the outer side of the screw ring 14 contacts the inner wall of the inner cavity 17. A limiting ring 16 is arranged on the bottom wall of the inner cavity 17, and the bottom of the screw ring 14 is connected to the top of the limiting ring 16.

[0066] During application: The fixing post 13 is fixed through the setting of the limit ring 16 and the screw ring 14, and then the fixing post is used to fix the metal zero-length spring 10. Then, the external thread on the outside of the spring fixing cylinder 1 can be adjusted up and down as the zero-adjusting large gear 2 rotates.

[0067] Embodiment 4:

[0068] Embodiment 4 is basically the same as Embodiment 1, and the differences are as follows:

[0069] The clip assembly 15 includes an upper connecting plate 151 and a lower connecting plate 155, which are connected by a suspension wire 154; the top of the upper connecting plate 151 is connected to the bottom of the fixing post 13, the left side of the bottom of the upper connecting plate 151 is connected to the top of the upper vertical plate 152, the right side of the upper vertical plate 152 is connected to the left side of the upper clamping plate 153, and the top of the upper clamping plate 153 contacts the bottom of the upper connecting plate 151; the bottom of the lower connecting plate 155 is connected to the top of the metal zero-length spring 10, the top of the lower connecting plate 155 is connected to the bottom of the lower vertical plate 156, the right side of the lower vertical plate 156 is connected to the left side of the lower clamping plate 157, and the bottom of the lower clamping plate 157 contacts the top of the lower connecting plate 155; there is a gap between the upper connecting plate 151 and the lower connecting plate 155, the upper vertical plate 152 and the upper clamping plate 153 are connected by two fixing bolts, the lower vertical plate 156 and the lower clamping plate 157 are connected by two fixing bolts, and the suspension wire 154 is arranged between the two fixing bolts.

[0070] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. Any equivalent modification or change made by those of ordinary skill in the art according to the disclosure of the present invention shall be included in the protection scope recorded in the claims.

Claims

1. A remote zeroing system for a metal zero-length spring relative gravimeter, characterized in that: The remote zero adjustment system of the metal zero-length spring relative gravimeter comprises a spring fixing cylinder (1), a zero adjustment large gear (2), a zero adjustment small gear (3), an upper cover plate (6), a bracket (7), a lower cover plate (8) and a zero adjustment motor (9); A zeroing motor (9) is installed at the bottom of the upper cover plate (6), the zeroing motor (9) is connected to the remote terminal signal, the output shaft of the zeroing motor (9) is connected to the zeroing pinion (3), the zeroing pinion (3) is meshed with the zeroing gear (2), the inner ring of the zeroing gear (2) is threadedly connected to the spring fixing cylinder (1), and the metal zero length spring (10) is arranged in the spring fixing cylinder (1); The top of the bracket (7) is connected to the bottom of the upper cover (6), and the bottom of the bracket (7) is connected to the top of the lower cover (8). A connecting groove (61) is provided on the top of the upper cover (6). An annular first gear limiting plate (41) and a second gear limiting plate (42) are sequentially mounted on the top and bottom of the upper cover (6). The first gear limiting plate (41) and the second gear limiting plate (42) are in contact with the zeroing gear (2), and the zeroing gear (2) rotates along the connecting groove (61). A through hole (81) is provided at the bottom of the lower cover plate (8), and the lower end of the metal zero-length spring (10) is arranged to pass through the through hole (81); The spring fixing cylinder (1) comprises a lower cylinder (11) and an upper cylinder (12); the top of the lower cylinder (11) is connected to the bottom of the upper cylinder (12); a fixing column (13) is arranged in the inner cavity (17) of the upper cylinder (12); the bottom of the fixing column (13) is connected to the top of a clip assembly (15); and the bottom of the clip assembly (15) is connected to the top of a metal zero-length spring (10).

2. A remote zeroing system for a metal zero-length spring relative gravimeter according to claim 1, characterized in that: The zero adjustment large gear (2) comprises a large gear (21) at the upper end, a connecting ring (23) in the middle, and a rotating ring (22) at the lower end, wherein the bottom of the large gear (21) is connected to the top of the connecting ring (23), and the bottom of the connecting ring (23) is connected to the top of the rotating ring (22); The outer teeth of the large gear (21) mesh with the zeroing small gear (3), the rotating ring (22) and the connecting groove (61) are rotatably matched, the first gear limiting plate (41) is arranged between the rotating ring (22) and the connecting ring (23), and the top of the second gear limiting plate (42) contacts the bottom of the rotating ring (22).

3. A remote zeroing system for a metal zero-length spring relative gravimeter according to claim 2, characterized in that: The first gear limiting plate (41) and the second gear limiting plate (42) have the same diameter, and the outer diameter of the first gear limiting plate (41) is greater than the outer diameter of the rotating ring (22).

4. The remote zeroing system of a metal zero-length spring relative gravimeter according to claim 2, characterized in that: The zero adjustment pinion (3) comprises a thick shaft (31), a thin shaft (32) and a pinion (33); the bottom of the thin shaft (32) is connected to the top of the thick shaft (31); the bottom of the thick shaft (31) is connected to the output shaft of the zero adjustment motor (9); the outer side of the thick shaft (31) is provided with a pinion (33); and the pinion (33) is meshed with the large gear (21).

5. The remote zeroing system of the metal zero-length spring relative gravimeter according to claim 4, characterized in that: A pinion fixing frame (5) is provided on the top of the upper cover plate (6), and the top of the thin shaft (32) passes through the pinion fixing frame (5) and is rotatably connected to the pinion fixing frame (5).

6. The remote zeroing system of a metal zero-length spring relative gravimeter according to claim 1, characterized in that: The outer peripheries of the lower cylinder (11) and the upper cylinder (12) are provided with external threads, and the inner wall of the zero adjustment gear (2) is provided with internal threads, and the external threads are threadably matched with the internal threads.

7. A remote zeroing system for a metal zero-length spring relative gravimeter according to claim 6, characterized in that: A spiral ring (14) is arranged in the inner cavity (17) of the upper cylinder (12), the inner side of the spiral ring (14) is connected to the outer side of the fixing column (13), and the outer side of the spiral ring (14) is in contact with the inner wall of the inner cavity (17); A limiting ring (16) is provided on the bottom wall of the inner cavity (17), and the bottom of the spiral ring (14) is connected to the top of the limiting ring (16).

8. The remote zeroing system of a metal zero-length spring relative gravimeter according to claim 1, characterized in that: The clip assembly (15) comprises an upper connecting plate (151) and a lower connecting plate (155), and the upper connecting plate (151) and the lower connecting plate (155) are connected via a hanging wire (154); The top of the upper connecting plate (151) is connected to the bottom of the fixing column (13), the left side of the bottom of the upper connecting plate (151) is connected to the top of the upper vertical plate (152), the right side of the upper vertical plate (152) is connected to the left side of the upper clamping plate (153), and the top of the upper clamping plate (153) is in contact with the bottom of the upper connecting plate (151); The bottom of the lower connecting plate (155) is connected to the top of the metal zero-length spring (10), the top of the lower connecting plate (155) is connected to the bottom of the lower vertical plate (156), the right side of the lower vertical plate (156) is connected to the left side of the lower clamping plate (157), and the bottom of the lower clamping plate (157) is in contact with the top of the lower connecting plate (155).

9. A remote zeroing system for a metal zero-length spring relative gravimeter according to claim 8, characterized in that: There is a gap between the upper connecting plate (151) and the lower connecting plate (155), the upper vertical plate (152) and the upper clamping plate (153) are connected via two fixing bolts, the lower vertical plate (156) and the lower clamping plate (157) are connected via two fixing bolts, and the hanging wire (154) is arranged between the two fixing bolts.

10. A zeroing method for a remote zeroing system of a metal zero-length spring relative gravimeter according to claim 1, characterized in that: The zeroing method is specifically as follows: The forward zeroing is as follows: the zeroing control system inputs a forward zeroing command to the zeroing motor (9), controls the zeroing motor (9) to rotate counterclockwise, the counterclockwise rotation of the zeroing motor (9) drives the zeroing small gear (3) to rotate counterclockwise, thereby driving the zeroing large gear (2) to rotate clockwise, the clockwise rotation of the zeroing large gear (2) drives the spring fixing cylinder (1) to move upward through the thread transmission, and moves the metal zero length spring (10) upward; The reverse zeroing is as follows: the zeroing control system inputs a reverse zeroing instruction to the zeroing motor (9), controlling the zeroing motor (9) to rotate clockwise; the clockwise rotation of the zeroing motor (9) drives the zeroing small gear (3) to rotate clockwise, thereby driving the zeroing large gear (2) to rotate counterclockwise; the counterclockwise rotation of the zeroing large gear (2) causes the spring fixing cylinder (1) to move downward through the threaded transmission, thereby causing the metal zero length spring (10) to move downward.

Images