Remote zeroing system of metal zero-length spring relative to gravimeter

Abstract

The invention discloses a remote zero setting system of a metal zero-length spring relative to a gravimeter. The remote zero setting system comprises a spring fixing cylinder, a zero setting bull gear, a zero setting pinion, an upper cover plate, a bracket, a lower cover plate and a zero setting motor, a zero-setting motor is mounted at the bottom of the upper cover plate and is in signal connection with a remote terminal, an output shaft of the zero-setting motor is connected with a zero-setting pinion, the zero-setting pinion is meshed with a zero-setting bull gear, an inner ring of the zero-setting bull gear is in threaded connection with a spring fixing cylinder, and a metal zero-length spring is arranged in the spring fixing cylinder; the top of the support is connected with the bottom of the upper cover plate, the bottom of the support is connected with the top of the lower cover plate, a connecting groove is formed in the top of the upper cover plate, an annular first gear limiting piece and an annular second gear limiting piece are sequentially installed at the top and the bottom of the upper cover plate, and the first gear limiting piece and the second gear limiting piece make contact with the zero setting large gear. According to the invention, zero setting can be carried out on the metal zero-length spring in time under the condition of unattended operation in the field.

Description

Technical Field

[0001] The invention relates to an improvement of a metal zero-length spring zeroing technology, belongs to the field of earth gravity, and in particular to a remote zeroing system of a metal zero-length spring relative to a gravimeter. Background Art

[0002] Earth gravity is an important physical quantity in geodesy, geophysics and metrology. Its size is mainly affected by the structure and shape of the earth; metal zero-length spring relative gravimeter can play an important role in geophysics, metrology and national defense security. Since the static gravimeter has high accuracy and can achieve an accuracy better than 1μGal, the observed gravity value can extract a lot of useful information. The metal zero-length spring gravimeter is a precision instrument that uses the elastic properties of the metal zero-length spring to accurately measure the change of gravitational acceleration in the earth's gravity field. The core of the most important sensor part is the metal zero-length spring. Its precision sensitivity is very high and it is also very sensitive. After the gravimeter is transported to the new observation site, the change of the gravity field will cause the length of the metal zero-length spring to change. When the output of the gravimeter changes too much, there is a risk of exceeding the observation range. In addition, the metal zero-length spring will have a creep effect, that is, when the mass of the suspended object remains unchanged, the length of the spring will slowly increase with time. That is to say, the gravimeter observation data will slowly deviate from the zero position over time until it exceeds the observation range.

[0003] Zeroing operation refers to adjusting the mass pendulum suspended by the metal zero-length spring back to the initial position, i.e., zero position, by means of mechanical transmission and other means. When the mass pendulum deviates from zero position or even exceeds the range, it will seriously affect the quality of the gravimeter data; if the metal zero-length spring cannot be adjusted back to zero position by means of zeroing, the gravimeter will not be able to observe valid data; traditional metal zero-length spring gravimeters are all zeroed using a pure mechanical structure, and professionals manually rotate the pendulum adjustment rod to adjust the 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 field, where the environmental conditions are relatively harsh and there is no special person on duty, the gravimeter data cannot be adjusted back to zero position in time after exceeding the range, and cannot work normally.

[0004] The Chinese patent application with application number CN201611028096.8 and application date November 15, 2016 discloses a zero-length spring, a zero-length spring connection structure and a dynamic gravimeter, wherein the zero-length spring includes a deformation region and a straight region, wherein the straight region is arranged at both ends of the deformation region, the deformation region and the straight region are integrally formed by metal spring wire, the connection point between the deformation region and the straight region is located on the axis of the deformation region, and the axis of the straight region coincides with the axis of the deformation region, and the end of the zero-length spring cancels the traditional structure of the hook and the suspension wire, and directly prepares the straight region at both ends of the spring, so that the connection component of the dynamic gravimeter can directly clamp the zero-length spring like clamping the suspension wire. Also disclosed is the connection structure of the zero-length spring and the dynamic gravimeter using the zero-length spring, and the above technology enables the dynamic gravimeter to relax the positioning accuracy, reduce the assembly difficulty, and simplify the assembly process, but does not solve the problem of timely zeroing the metal zero-length spring in the case of unattended operation in the field.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0006] The purpose of the present invention is to overcome the problem in the prior art of timely zeroing a metal zero-length spring when there is no one on duty in the field, and to provide a remote zeroing system for a metal zero-length spring relative to a gravimeter, which can timely zero the metal zero-length spring when there is no one on duty in the field.

[0007] To achieve the above purpose, the technical solution of the present invention is: a remote zeroing system for a metal zero-length spring relative to a gravimeter, the remote zeroing system for a metal zero-length spring relative to a gravimeter comprises 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; A zeroing motor is installed at the bottom of the upper cover plate, the zeroing motor is connected to the remote terminal signal, the output shaft of the zeroing motor is connected to the zeroing pinion, the zeroing pinion is meshed with the zeroing gear, the inner ring of the zeroing gear is threadedly connected to the spring fixing cylinder, and the metal zero length spring is arranged in 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 connecting groove is provided on the top of the upper cover plate, and an annular first gear limiting plate and a second gear limiting plate are installed on the top and bottom of the upper cover plate in sequence, the first gear limiting plate and the second gear limiting plate are in contact with the zeroing gear, and the zeroing gear rotates along the connecting groove; A through hole is provided at the bottom of the lower cover plate, and the lower end of the metal zero-length spring passes through the through hole.

[0008] The zeroing gear comprises a gear at the upper end, a connecting ring in the middle and a rotating ring at the lower end, the bottom of the 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; The outer teeth of the large gear mesh with the zeroing pinion, the rotating ring and the connecting groove rotate in cooperation, the first gear limiting plate is arranged between the rotating ring and the connecting ring, and the top of the second gear limiting plate contacts the bottom of the rotating ring.

[0009] The diameters of the first gear limiting plate and the second gear limiting plate are the same, and the outer diameter of the first gear limiting plate is greater than the outer diameter of the rotating ring.

[0010] The zeroing pinion gear comprises a thick shaft, a thin shaft and a pinion 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 zeroing motor, a pinion gear is sleeved on the outer side of the thick shaft, and the pinion gear is meshed with the large gear.

[0011] A pinion fixing frame is arranged on the top of the upper cover plate, and the top of the thin shaft penetrates through the pinion fixing frame and is rotatably connected with the pinion fixing frame.

[0012] The spring fixing cylinder includes a lower cylinder and an upper cylinder. The top of the lower cylinder is connected to the bottom of the upper cylinder. A fixing column is arranged in the inner cavity of the upper cylinder. 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.

[0013] The outer peripheries of the lower cylinder and the upper cylinder are provided with external threads, and the inner wall of the zeroing gear is provided with internal threads, and the external threads are matched with the internal threads.

[0014] A spiral ring is arranged in the inner cavity of the upper cylinder, the inner side of the spiral ring is connected to the outer side of the fixing column, and the outer side of the spiral ring is in contact with the inner wall of the inner cavity; A limiting ring is arranged on the bottom wall of the inner cavity, and the bottom of the spiral ring is connected to the top of the limiting ring.

[0015] The clip assembly comprises an upper connecting plate and a lower connecting plate, and the upper connecting plate and the lower connecting plate are connected by a hanging wire; 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, and the top of the upper clamping plate is in contact with the bottom of the upper connecting plate; 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, and the bottom of the lower clamping plate contacts the top of the lower connecting plate.

[0016] 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, and the hanging wire is arranged between the two fixing bolts.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In a remote zeroing system of a metal zero-length spring relative to a gravimeter of the present invention, a zeroing motor is installed at the bottom of the upper cover plate, the zeroing motor is connected to a remote terminal signal, the output shaft of the zeroing motor is connected to a zeroing pinion, the zeroing pinion is meshed with a zeroing gear, the inner ring of the zeroing gear is threadedly connected to a spring fixing cylinder, and the metal zero-length spring is arranged in the spring fixing cylinder. When in use, the control terminal inputs a zeroing instruction to the zeroing motor, controls the zeroing motor to rotate counterclockwise / clockwise, and the rotation of the zeroing motor drives the zeroing pinion to rotate, thereby driving the zeroing gear to rotate. When the zeroing gear rotates clockwise, the spring fixing cylinder is moved upward by thread transmission, so that the metal zero-length spring moves upward. When the zeroing gear rotates counterclockwise, the spring fixing cylinder is moved downward by thread transmission, so that the metal zero-length spring moves downward, so that the metal zero-length spring can be zeroed in time when there is no one on duty in the field, and the adjustment is more convenient and rapid. Therefore, the present invention can zero the metal zero-length spring in time when there is no one on duty in the field.

[0018] 2. In the remote zeroing system of a metal zero-length spring relative to a gravimeter of the present invention, the outer teeth of the large gear mesh with the zeroing small gear, the rotating ring and the connecting groove rotate in cooperation, the first gear limiting plate is arranged between the rotating ring and the connecting ring, the top of the second gear limiting plate contacts the bottom of the rotating ring, when in use, the lower end of the zeroing large gear slides in cooperation with the central circular groove of the upper cover plate, the first gear limiting plate and the second gear limiting plate fixed on the lower cover plate block the protrusion of the connecting ring, so that the zeroing large gear can rotate and will not fall off the upper cover plate. Therefore, the present invention is safe to use and stable in operation.

[0019] 3. In a remote zeroing system of a metal zero-length spring relative to a gravimeter of the present invention, a spring fixing cylinder includes a lower cylinder and an upper cylinder, the top of the lower cylinder is connected to the bottom of the upper cylinder, a fixing column is arranged in the inner cavity of the upper cylinder, 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, when used, the fixing column is fixed by the setting of a limit ring and a screw ring, and then the fixing column is used to fix the metal zero-length spring, and then the external thread on the outer side of the spring fixing cylinder can be adjusted up and down with the rotation of the zeroing gear. Therefore, the present invention is simple to fix and convenient to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a connection diagram of the zero adjustment large gear and the zero adjustment small gear in the present invention.

[0022] Figure 3 It is a schematic diagram of the connection between the spring fixing cylinder and the zero adjustment gear in the present invention.

[0023] Figure 4 It is a structural schematic diagram of the spring fixing cylinder in the present invention.

[0024] Figure 5 It is a structural schematic diagram of the clip assembly in the present invention.

[0025] In the figure: spring fixing cylinder 1, lower cylinder 11, upper cylinder 12, fixing column 13, screw ring 14, clip assembly 15, upper connecting plate 151, upper vertical plate 152, upper clamping plate 153, hanging wire 154, lower connecting plate 155, lower vertical plate 156, lower clamping plate 157, limiting ring 16, inner cavity 17, zeroing large gear 2, zeroing small gear 3, first gear limiting plate 41, second gear limiting plate 42, small gear fixing frame 5, upper cover plate 6, bracket 7, lower cover plate 8, zeroing motor 9. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] See also Figures 1 to 5 A remote zeroing system for a metal zero-length spring relative to a gravimeter, the remote zeroing system for a metal zero-length spring relative to a gravimeter comprising a spring fixing cylinder 1, a zeroing large gear 2, a zeroing small gear 3, an upper cover plate 6, a bracket 7, a lower cover plate 8 and a zeroing 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. 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 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 provided on the top of the upper cover plate 6. The top and bottom of the upper cover plate 6 are sequentially installed with an annular first gear limiting plate 41 and a second gear limiting plate 42. 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 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 .

[0028] The zeroing gear 2 includes a 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 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 pinion 3 , the rotating ring 22 rotates 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 .

[0029] The diameters of the first gear limiting plate 41 and the second gear limiting plate 42 are the same, and the outer diameter of the first gear limiting plate 41 is greater than the outer diameter of the rotating ring 22 .

[0030] 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, and the bottom of the thick shaft 31 is connected to the output shaft of the zeroing motor 9. The outer side of the thick shaft 31 is covered with a pinion 33, and the pinion 33 is meshed with the large gear 21.

[0031] A pinion fixing frame 5 is disposed on the top of the upper cover plate 6 , and the top of the thin shaft 32 penetrates through the pinion fixing frame 5 and is rotatably connected to the pinion fixing frame 5 .

[0032] The spring fixing cylinder 1 includes 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 the clip assembly 15. The bottom of the clip assembly 15 is connected to the top of the metal zero-length spring 10.

[0033] The outer peripheries of the lower cylinder 11 and the upper cylinder 12 are provided with external threads, and the inner wall of the zeroing gear 2 is provided with internal threads, and the external threads are threadedly matched with the internal threads.

[0034] A spiral ring 14 is disposed 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 disposed 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 .

[0035] 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 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 .

[0036] 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 hanging wire 154 is arranged between the two fixing bolts.

[0037] The supplementary description of the present invention is as follows: When the first gear limiting plate 41 and the second gear limiting plate 42 are fixed on the upper cover plate 6, the tightness of the screws should be adjusted according to the rotation effect of the zeroing gear 2. If the zeroing gear 2 does not rotate smoothly, the tightness of the first gear limiting plate 41 and the second gear limiting plate 42 should be adjusted until the zeroing gear 2 rotates smoothly.

[0038] Embodiment 1: A remote zeroing system for a metal zero-length spring relative to a gravimeter, the remote zeroing system for the metal zero-length spring relative to a gravimeter comprising a spring fixing tube 1, a zeroing large gear 2, a zeroing small gear 3, an upper cover plate 6, a bracket 7, a lower cover plate 8 and a zeroing motor 9; the zeroing motor 9 is installed at the bottom of the upper cover plate 6, the output shaft of the zeroing motor 9 is connected to the zeroing small gear 3, the zeroing small gear 3 is meshed with the zeroing large gear 2, the inner ring of the zeroing large gear 2 is threadedly connected to the spring fixing tube 1, and the metal zero-length spring 10 is arranged on the spring fixing tube 1; the top of the bracket 7 is connected to the bottom of the upper cover 6, the bottom of the bracket 7 is connected to the top of the lower cover 8, the top of the upper cover 6 is provided with a connecting groove 61, the top and bottom of the upper cover 6 are sequentially provided with an annular first gear limiting piece 41 and a second gear limiting piece 42, the first gear limiting piece 41 and the second gear limiting piece 42 are in contact with the zeroing gear 2, and the zeroing gear 2 rotates along the connecting groove 61; the bottom of the lower cover 8 is provided with a through hole 81, and the lower end of the metal zero length spring 10 is provided through the through hole 81.

[0039] In application: the zero adjustment is the operation of moving the spring in the metal zero-length spring gravimeter forward or reverse; The forward zeroing is as follows: the zeroing control system inputs a forward zeroing instruction 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 tube 1 to move downward through threaded transmission, causing the metal zero length spring 10 to move downward.

[0040] Embodiment 2: Embodiment 2 is substantially the same as Embodiment 1, except that: The zeroing 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 outer teeth of the large gear 21 are meshed with the zeroing small gear 3, and the rotating ring 22 is rotatably matched with the connecting groove 61. 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 is in contact with the bottom of the rotating ring 22. The first gear limiting plate 41 and the second gear limiting plate 42 have the same diameter, the outer diameter of the first gear limiting plate 41 is larger than the outer diameter of the rotating ring 22; 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, and a pinion 33 is sleeved on the outer side of the thick shaft 31, and the pinion 33 is meshed with the large gear 21; 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.

[0041] When in use: the lower end of the zeroing gear 2 slides in cooperation with the circular groove in the center of the upper cover plate 6, and the first gear limiting plate 41 and the second gear limiting plate 42 fixed on the lower cover plate 8 block the protrusion of the connecting ring 23, so that the zeroing gear 2 can rotate without falling off the upper cover plate 6, and the lower end of the zeroing pinion 3 slides in cooperation with the hole on the upper cover plate 6, and the zeroing pinion 3 transmits power to the zeroing gear 2, and the transmission ratio is 1:10.

[0042] Embodiment 3: Embodiment 3 is substantially the same as Embodiment 1, except that: The spring fixing cylinder 1 includes 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 the clip assembly 15. The bottom of the clip assembly 15 is connected to the top of the metal zero-length spring 10. The outer periphery of the lower cylinder 11 and the upper cylinder 12 is provided with an external thread, and the inner wall of the zero adjustment gear 2 is provided with an internal thread, and the external thread and the internal thread are threaded together. A screw ring 14 is arranged in the inner cavity 17 of the upper cylinder 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.

[0043] When in use: the fixing column 13 is fixed by the setting of the limit ring 16 and the screw ring 14, and then the fixing column is used to fix the metal zero-length spring 10, and then the external thread on the outside of the spring fixing tube 1 can be adjusted up and down with the rotation of the zero adjustment gear 2.

[0044] Embodiment 4: Embodiment 4 is substantially the same as Embodiment 1, except that: 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 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 metal zero-length spring 1 0, 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 hanging wire 154 is set between the two fixing bolts.

[0045] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should 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).

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. A remote zeroing system for 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 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).

7. A remote zeroing system for a metal zero-length spring relative gravimeter according to claim 6, 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.

8. The remote zeroing system of the metal zero-length spring relative gravimeter according to claim 7, 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).

9. The remote zeroing system of a metal zero-length spring relative gravimeter according to claim 6, 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).

10. A remote zeroing system for a metal zero-length spring relative gravimeter according to claim 9, 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.

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