A metal zero-length spring gravimeter measurement system for field observation

Abstract

A metal zero-length spring gravimeter measurement system for field observation, wherein a zeroing motor is installed at the bottom of the top plate, 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 tube, a metal zero-length spring is arranged in the spring fixing tube, the upper cover plate is connected to the lower cover plate by a support assembly, a locking pendulum motor is installed on the top of the upper cover plate, the locking pendulum motor is connected to a control terminal signal, the output shaft of the locking pendulum motor passes through the upper cover plate and is connected to a transmission pinion, the outer periphery of the transmission pinion is meshed with a first locking pendulum gear, the first locking pendulum gear is meshed with a second locking pendulum gear, the metal zero-length spring moves longitudinally along the zeroing tube, a magnetic steel is arranged in the metal frame, a circle of copper wire is wound around the outer side of the metal frame, and the copper wire is electrically connected to an external power supply. The metal zero-length spring of the present invention is not easily affected by vibration during field observation.

Description

Technical Field

[0001] The invention relates to an improvement of a metal zero-length spring measurement technology, belongs to the field of earth gravity, and in particular to a metal zero-length spring gravimeter measurement system used for field observation. 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. The metal zero-length spring relative gravimeter can play an important role in geophysics, metrology and other disciplines as well as national defense security. Due to the high accuracy of static gravimeters, 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 gravity acceleration in the earth's gravity field. The most important sensor part is the metal zero-length spring, which has very high precision sensitivity and is also very sensitive. During normal observation, the metal spring and the connected lock pendulum are in a free state. When not observing, the metal spring and the connected lock pendulum need to be fixed. Under field environmental conditions, the gravimeter is prone to vibration, which causes the measured metal zero-length spring to shake, causing the spring to malfunction and affect normal measurement.

[0003] The Chinese patent application with application number CN201510915426.4 and application date December 10, 2015 discloses a precision metal zero-length spring temperature coefficient measuring instrument and method thereof, which relates to the performance detection technology of the core components of the geoscience instrument; the measuring instrument is: in the shell unit, from the outside to the inside, there are arranged in sequence an outer insulation layer, an outer thermostatic tank, an inner insulation layer, a metal Dewar flask and an inner thermostatic tank; the temperature control system arranged outside the shell unit is connected to the outer thermostatic tank and the inner thermostatic tank respectively; the mechanical sensitive probe unit is arranged in the inner thermostatic tank, and the zero-length spring is arranged in the mechanical sensitive probe unit. The measuring instrument can truly simulate the use environment of the zero-length spring, so as to measure the temperature coefficient of the spring more accurately and truly; however, the above scheme does not solve the problem that the existing metal zero-length spring is easily affected by vibration during field observation.

[0004] 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

[0005] The purpose of the present invention is to overcome the problem in the prior art that the metal zero-length spring is easily affected by vibration during field observation, and to provide a metal zero-length spring gravimeter measurement system for field observation, which is not easily affected by vibration during field observation.

[0006] To achieve the above purpose, the technical solution of the present invention is: a metal zero-length spring gravimeter measurement system applied to field observation, the metal zero-length spring gravimeter measurement system applied to field observation includes a spring fixing cylinder, a zeroing gear, a zeroing gear, a lock pendulum positioning member, a fixing assembly, a transmission assembly, a lock pendulum member, a bracket, a zeroing motor and a lock pendulum motor, the lock pendulum positioning member includes a first lock pendulum arm and a second lock pendulum arm that are symmetrically arranged, the fixing assembly includes an upper cover plate and a lower cover plate, and the transmission assembly includes a first lock pendulum gear and a second lock pendulum gear;

[0007] A zeroing motor is installed at the bottom of the top 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;

[0008] The top of the bracket is connected to the bottom of the top plate, the bottom of the bracket is connected to the top of the lower partition, a connecting groove is provided on the top of the top plate, and an annular first gear limiting plate and a second gear limiting plate are installed on the top and bottom of the top 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 partition, and the lower end of the metal zero length spring passes through the through hole;

[0009] The bottom of the lower partition is connected to the top of the support, the bottom of the support is connected to the top of the placement plate, the top of the placement plate is connected to the bottom of the metal frame, the metal frame is arranged inside the support, three positioning bolts are evenly arranged on the lower partition, the bottoms of the three positioning bolts penetrate the lower partition, a pad and then connected to the upper cover plate, and the upper cover plate and the lower cover plate are connected by a support assembly;

[0010] The top of the lower cover is equipped with a first lock swing arm and a second lock swing arm, and the lock swing member is clamped and arranged between the first lock swing arm and the second lock swing arm. The upper cover is connected to the lower cover by a support assembly, and a lock swing motor is installed on the top of the upper cover. The lock swing motor is connected to the control terminal signal, and the output shaft of the lock swing motor passes through the upper cover and is connected to the transmission pinion gear. The outer periphery of the transmission pinion gear is meshed with the first lock swing gear, and the first lock swing gear is meshed with the second lock swing gear. The first lock swing gear and the second lock swing gear are movably connected to the lower cover;

[0011] The first lock pendulum gear is provided with a first gear pin, the first gear pin rotates clockwise along the first lock pendulum gear and abuts against the first lock pendulum arm, and the second lock pendulum gear is provided with a second gear pin, the second gear pin rotates counterclockwise along the second lock pendulum gear and abuts against the second lock pendulum arm;

[0012] A zero adjustment tube is plugged into the pad, the bottom of the zero adjustment tube is plugged into the top of the metal frame, the metal zero length spring moves longitudinally along the zero adjustment tube, a magnetic steel is arranged in the metal frame, a circle of copper wire is wound around the outside of the metal frame, and the copper wire is electrically connected to an external power supply.

[0013] A groove is provided on the side of the metal frame, and the copper wire is arranged in the groove in a loop;

[0014] The metal zero-length spring contacts the magnetic steel downward along the zero-adjusting tube.

[0015] 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;

[0016] 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.

[0017] The zero adjustment 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 zero adjustment motor, a pinion gear is sleeved on the outer side of the thick shaft, and the pinion gear is meshed with the large gear;

[0018] A pinion fixing frame is arranged on the top of the top plate, and the top of the thin shaft penetrates through the pinion fixing frame and is rotatably connected with the pinion fixing frame.

[0019] The spring fixing cylinder comprises 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, and the bottom of the clip assembly is connected to the top of the metal zero-length spring;

[0020] 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;

[0021] 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.

[0022] 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;

[0023] 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;

[0024] 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 is in contact with the top of the lower connecting plate;

[0025] 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.

[0026] The support assembly includes a first support column, a second support column, a third support column, a fourth support column, a fifth support column and a sixth support column, the top of which passes through the upper cover plate and the bottom is installed on the lower cover plate;

[0027] The bottoms of the first support column and the second support column are respectively connected to the left and right sides of the top of the lower cover plate;

[0028] The lower end side periphery of the third support column is rotatably connected to the first lock swing arm, and the lower end side periphery of the fourth support column is rotatably connected to the second lock swing arm;

[0029] The bottom of the fifth support column passes through the first pendulum lock gear and is connected to the top of the lower cover plate, and the fifth support column is rotatably connected to the first pendulum lock gear. The bottom of the sixth support column passes through the second pendulum lock gear and is connected to the top of the lower cover plate, and the sixth support column is rotatably connected to the second pendulum lock gear.

[0030] The first support column includes an upper support column and a lower support column, the top of the upper support column passes through the upper cover plate, the bottom of the upper support column is connected to the top of the lower support column, and the bottom of the lower support column is connected to the top of the lower cover plate.

[0031] One end of the first locking swing arm is connected to the side of the first circular ring, the inner ring of the first circular ring is rotatably connected to the outer side of the third support column, and one end of the second locking swing arm is connected to the side of the second circular ring, and the inner ring of the second circular ring is rotatably connected to the outer side of the fourth support column.

[0032] A first lock swing clamp is inserted into the side surface of the first lock swing arm, and a second lock swing clamp is inserted into the side surface of the second lock swing arm. The first lock swing clamp and the second lock swing clamp have the same structure and are symmetrically arranged.

[0033] The first lock swing clamp comprises a first plug rod and a first fixed clamp, one end of the first plug rod passes through the first lock swing arm and is connected to one side of the first fixed clamp, and the other side of the first fixed clamp is clamped with the lock swing member, and the lock swing member is composed of a lower connecting plate, a lower vertical plate, and a lower clamping plate;

[0034] A card slot is provided on one side of the first fixing clamp close to the lock pendulum, and the card slot is card-connected with the lock pendulum.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. In a metal zero-length spring gravimeter measuring system used for field observation, a zeroing motor is installed at the bottom of a top 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 a metal zero-length spring is arranged in the spring fixing cylinder. When in use, a zeroing command is input to the zeroing motor to control the zeroing motor to rotate counterclockwise, the zeroing motor rotates to drive 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 is moved upward, and when the zeroing gear rotates counterclock ... and the metal zero-length spring is moved upward by thread transmission, and when the zeroing gear rotates counterclockwise, the spring fixing cylinder is moved upward by thread transmission, and the metal zero-length spring is moved upward by thread transmission, and when the zeroing gear rotates counterclockwise, the spring fixing cylinder is moved upward by thread transmission, and the metal zero-length spring is moved upward by thread transmission, and when the zeroing gear rotates counterclockwise, the spring fixing cylinder is moved upward by thread transmission, and the metal zero- The spring fixing tube moves downward, so that the metal zero-length spring moves downward, so that when there is no one on duty in the field, the metal zero-length spring can be adjusted to zero in time, and then observation is carried out. In addition, after the observation is completed, the lock swing motor is controlled to rotate counterclockwise, and the lock swing motor rotates counterclockwise to drive the first lock swing gear to rotate clockwise, and the first lock swing gear drives the second lock swing gear to rotate counterclockwise to drive the first gear pin and the second gear pin to rotate, thereby driving the first lock swing arm and the second lock swing arm to approach each other, so that the first lock swing clamp and the second lock swing clamp lock the swing piece, and the metal zero-length spring is locked in the first lock swing clamp and the second lock swing clamp for fixing, and the metal zero-length spring is protected in time, so that it can be in a stable state when it vibrates in the field. Therefore, the metal zero-length spring of the present invention is not easily affected by vibration when observed in the field.

[0037] 2. In a metal zero-length spring gravimeter measurement system used for field observation, a magnetic steel is arranged in a metal frame, a circle of copper wire is wound around the outside of the metal frame, the copper wire is electrically connected to an external power supply, a groove is provided on the side of the metal frame, and the copper wire is arranged in the groove; the metal zero-length spring contacts the magnetic steel downward along the zero adjustment tube, and when used, when the copper wire is energized to generate current, magnetism will be generated, and the magnetic steel will adjust up and down in the generated magnetic field, reducing the current if it is biased upward and increasing the current if it is biased downward, until the magnetic steel is adjusted to zero position, and the metal zero-length spring is also adjusted to zero position. Therefore, the zero adjustment of the present invention is more convenient and simpler.

[0038] 3. In a metal zero-length spring gravimeter measurement system for field observation of the present invention, unattended operation can be achieved through a remote control mechanism of a control terminal in a remote loosening and locking pendulum system. When the environment suddenly becomes bad during field observation, the pendulum can be locked remotely and timely to avoid damage to the instrument, making the measurement safer and more adaptable. Therefore, the measurement of the present invention is safer and more adaptable.

[0039] 4. In a metal zero-length spring gravimeter measuring system used for field observation, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the present invention.

[0041] Figure 2 It is a schematic diagram of the structure of the support in the present invention.

[0042] Figure 3 It is a connection diagram of the zero adjustment large gear and the zero adjustment small gear in the present invention.

[0043] Figure 4 It is a structural schematic diagram of the clip assembly in the present invention.

[0044] Figure 5 It is a structural schematic diagram of the lower cylinder in the present invention.

[0045] Figure 6 It is a schematic diagram of the connection between the spring fixing cylinder and the zero adjustment gear in the present invention.

[0046] Figure 7 It is a structural schematic diagram of the support in the present invention.

[0047] Figure 8 It is a structural schematic diagram of the placement plate in the present invention.

[0048] Fig. 9 It is a connection schematic diagram of the zero adjustment tube in the present invention.

[0049] Fig.10 It is a schematic diagram of the structure of the magnetic steel in the present invention.

[0050] Fig.11 It is a connection diagram of the lock swing motor in the present invention.

[0051] Fig.12 It is a schematic diagram of the connection between the upper cover plate and the lower cover plate in the present invention.

[0052] Fig.13 It is a working schematic diagram of the first pendulum-locking gear and the second pendulum-locking gear in the present invention.

[0053] Fig.14 It is a schematic diagram of fixing the lock ornament in the present invention.

[0054] In the figure: spring fixing cylinder 1, metal zero length spring 10, 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, a pad 19, positioning bolt 191, zero adjustment tube 192, zero adjustment large gear 2, zero adjustment small gear 3, first gear limiting plate 41, second gear limiting plate 42, small gear fixing frame 5, top plate 6, bracket 7, support 71, lower partition 8, placement plate 801, metal frame 802, groove 803, copper wire 804, magnetic steel 805, zero adjustment motor 9, lock swing motor 100 , transmission pinion 200, lock pendulum positioning member 30, first lock pendulum arm 310, first ring 3110, second lock pendulum arm 320, second ring 3210, base 330, fixing assembly 40, upper cover plate 410, lower cover plate 420, through hole 430, lock pendulum member 50, support assembly 60, first support column 610, second support column 620, third support column 630, fourth support column 640, fifth support column 650, sixth support column 660, first lock pendulum clamp 710, first insert rod 7110, first fixing clamp 7120, slot 7130, second lock pendulum clamp 720, first lock pendulum gear 810, second lock pendulum gear 820, first gear pin 910, second gear pin 920. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] See also Figures 1 to 14 A metal zero-length spring gravimeter measuring system for field observation, the metal zero-length spring gravimeter measuring system for field observation comprising a spring fixing cylinder 1, a zeroing gear 2, a zeroing gear 3, a lock pendulum positioning member 30, a fixing assembly 40, a transmission assembly, a lock pendulum member 50, a bracket 7, a zeroing motor 9 and a lock pendulum motor 100, the lock pendulum positioning member 30 comprising a first lock pendulum arm 310 and a second lock pendulum arm 320 which are symmetrically arranged, the fixing assembly 40 comprising an upper cover plate 410 and a lower cover plate 420, and the transmission assembly comprising a first lock pendulum gear 810 and a second lock pendulum gear 820;

[0057] A zeroing motor 9 is installed at the bottom of the top 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;

[0058] The top of the bracket 7 is connected to the bottom of the top plate 6, and the bottom of the bracket 7 is connected to the top of the lower partition 8. A connecting groove 61 is provided on the top of the top plate 6. The top and bottom of the top plate 6 are successively 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 large gear 2, and the zeroing large gear 2 rotates along the connecting groove 61. A through hole 81 is provided at the bottom of the lower partition 8, and the lower end of the metal zero length spring 10 is arranged to pass through the through hole 81.

[0059] The bottom of the lower partition 8 is connected to the top of the support 71, the bottom of the support 71 is connected to the top of the placement plate 801, the top of the placement plate 801 is connected to the bottom of the metal frame 802, the metal frame 802 is arranged inside the support 71, three positioning bolts 191 are evenly arranged on the lower partition 8, the bottom of the three positioning bolts 191 penetrates the lower partition 8, a pad 19 and then connects to the upper cover plate 410, and the upper cover plate 410 and the lower cover plate 420 are connected through the support assembly 60;

[0060] The top of the lower cover plate 420 is installed with a first lock swing arm 310 and a second lock swing arm 320, and the lock swing member 50 is clamped and arranged between the first lock swing arm 310 and the second lock swing arm 320. The upper cover plate 410 and the lower cover plate 420 are connected through a support assembly 60. The top of the upper cover plate 410 is installed with a lock swing motor 100, which is connected to the control terminal signal. The output shaft of the lock swing motor 100 passes through the upper cover plate 410 and is connected to the transmission pinion 200. The outer periphery of the transmission pinion 200 is meshed with the first lock swing gear 810, and the first lock swing gear 810 is meshed with the second lock swing gear 820. The first lock swing gear 810 and the second lock swing gear 820 are movably connected with the lower cover plate 420;

[0061] The first lock pendulum gear 810 is provided with a first gear pin 910, and the first gear pin 910 rotates clockwise along the first lock pendulum gear 810 to abut against the first lock pendulum arm 310, and the second lock pendulum gear 820 is provided with a second gear pin 920, and the second gear pin 920 rotates counterclockwise along the second lock pendulum gear 820 to abut against the second lock pendulum arm 320;

[0062] A zero adjustment tube 192 is plugged into the pad 19, the bottom of the zero adjustment tube 192 is plugged into the top of the metal frame 802, the metal zero length spring 10 moves longitudinally along the zero adjustment tube 192, a magnetic steel 805 is arranged in the metal frame 802, a circle of copper wire 804 is wrapped around the outside of the metal frame 802, and the copper wire 804 is electrically connected to an external power supply.

[0063] A groove 803 is formed on the side of the metal frame 802, and a copper wire 804 is arranged in the groove 803;

[0064] The metal zero-length spring 10 moves downward along the zero-adjusting tube 192 and contacts the magnetic steel 805 .

[0065] 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.

[0066] 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 .

[0067] The zeroing 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 zeroing motor 9. The outer side of the thick shaft 31 is sleeved with a pinion 33. The pinion 33 is meshed with the large gear 21.

[0068] A pinion fixing frame 5 is disposed on the top of the top 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 .

[0069] 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 the clip assembly 15. The bottom of the clip assembly 15 is connected to the top of the metal zero-length spring 10.

[0070] 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;

[0071] 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 .

[0072] 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;

[0073] 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;

[0074] 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;

[0075] 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.

[0076] The support assembly 60 includes a first support column 610, a second support column 620, a third support column 630, a fourth support column 640, a fifth support column 650 and a sixth support column 660, the top of which penetrates the upper cover plate 410 and the bottom is installed on the lower cover plate 420;

[0077] The bottoms of the first support column 610 and the second support column 620 are respectively connected to the left and right sides of the top of the lower cover plate 420;

[0078] The lower side of the third support column 630 is rotatably connected to the first lock swing arm 310, and the lower side of the fourth support column 640 is rotatably connected to the second lock swing arm 320;

[0079] The bottom of the fifth support column 650 passes through the first lock pendulum gear 810 and is connected to the top of the lower cover plate 420. The fifth support column 650 is rotatably connected to the first lock pendulum gear 810. The bottom of the sixth support column 660 passes through the second lock pendulum gear 820 and is connected to the top of the lower cover plate 420. The sixth support column 660 is rotatably connected to the second lock pendulum gear 820.

[0080] The first support column 610 includes an upper support column 6110 and a lower support column 6220 . The top of the upper support column 6110 passes through the upper cover plate 410 , the bottom of the upper support column 6110 is connected to the top of the lower support column 6220 , and the bottom of the lower support column 6220 is connected to the top of the lower cover plate 420 .

[0081] One end of the first locking swing arm 310 is connected to the side of the first circular ring 3110, the inner ring of the first circular ring 3110 is rotatably connected to the outer side of the third support column 630, and one end of the second locking swing arm 320 is connected to the side of the second circular ring 3210, the inner ring of the second circular ring 3210 is rotatably connected to the outer side of the fourth support column 640.

[0082] A first lock swing clamp 710 is inserted into the side of the first lock swing arm 310 , and a second lock swing clamp 720 is inserted into the side of the second lock swing arm 320 . The first lock swing clamp 710 and the second lock swing clamp 720 have the same structure and are symmetrically arranged.

[0083] The first lock swing clamp 710 includes a first insertion rod 7110 and a first fixing clamp 7120. One end of the first insertion rod 711 passes through the first lock swing arm 310 and is connected to one side of the first fixing clamp 7120. The other side of the first fixing clamp 7120 is clamped with the lock swing member 50. The lock swing member 50 is composed of a lower connecting plate 155, a lower vertical plate 156, and a lower clamping plate 157.

[0084] A slot 7130 is formed on one side of the first fixing clip 7120 close to the lock pendulum 50 , and the slot 7130 is engaged with the lock pendulum 50 .

[0085] The supplementary description of the present invention is as follows:

[0086] 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.

[0087] Embodiment 1:

[0088] A metal zero-length spring gravimeter measuring system for field observation, the metal zero-length spring gravimeter measuring system for field observation comprising a spring fixing tube 1, a zeroing gear 2, a zeroing pinion 3, a pendulum lock positioning member 30, a fixing assembly 40, a transmission assembly, a pendulum lock member 50, a bracket 7, a zeroing motor 9 and a pendulum lock motor 100, the pendulum lock positioning member 30 comprising a first pendulum lock arm 310 and a second pendulum lock arm 320 symmetrically arranged, the fixing assembly 40 comprising an upper cover plate 410 and a lower cover plate 420, the transmission assembly comprising a first pendulum lock gear 810 and a second pendulum lock gear 820; a zeroing motor 9 is installed at the bottom of the top plate 6, the zeroing motor 9 is connected to a remote terminal signal, and the output shaft of the zeroing motor 9 is connected to the zeroing pinion 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 in the spring fixing tube 1; the top of the bracket 7 is connected to the bottom of the top plate 6, the bottom of the bracket 7 is connected to the top of the lower partition 8, and a connecting groove 61 is provided on the top of the top plate 6. The top and bottom of the top plate 6 are successively 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 large gear 2, and the zeroing large gear 2 rotates along the connecting groove 61. A through hole 81 is provided at the bottom of the lower partition 8, and the lower end of the metal zero length spring 10 is arranged through the through hole 81; the bottom of the lower partition 8 is connected to the top of the support 71, and the support The bottom of 71 is connected to the top of the placement plate 801, the top of the placement plate 801 is connected to the bottom of the metal frame 802, the metal frame 802 is arranged inside the support 71, three positioning bolts 191 are evenly arranged on the lower partition 8, the bottom of the three positioning bolts 191 penetrates the lower partition 8 and a pad 19 and is connected to the upper cover plate 410, the upper cover plate 410 and the lower cover plate 420 are connected by a support assembly 60; the top of the lower cover plate 420 is installed with a first locking swing arm 310 and a second locking swing arm 320, the locking swing member 50 is clamped and arranged between the first locking swing arm 310 and the second locking swing arm 320, the upper cover plate 410 and the lower cover plate 420 are connected by a support assembly 60, and the top of the upper cover plate 410 is installed with a locking swing motor 1 00, the lock pendulum motor 100 is connected with the control terminal signal, the output shaft of the lock pendulum motor 100 passes through the upper cover plate 410 and is connected with the transmission pinion 200, the outer periphery of the transmission pinion 200 is meshed with the first lock pendulum gear 810, the first lock pendulum gear 810 is meshed with the second lock pendulum gear 820, the first lock pendulum gear 810 and the second lock pendulum gear 820 are movably connected with the lower cover plate 420; the first lock pendulum gear 810 is provided with a first gear pin 910, the first gear pin 910 rotates clockwise along the first lock pendulum gear 810 and abuts against the first lock pendulum arm 310, the second lock pendulum gear 820 is provided with a second gear pin 920, the second gear pin 920 rotates counterclockwise along the second lock pendulum gear 820 and abuts against the second lock pendulum arm 320;A zero adjustment tube 192 is plugged into the pad 19, the bottom of the zero adjustment tube 192 is plugged into the top of the metal frame 802, the metal zero length spring 10 moves longitudinally along the zero adjustment tube 192, a magnetic steel 805 is arranged inside the metal frame 802, a circle of copper wire 804 is wound around the outside of the metal frame 802, and the copper wire 804 is electrically connected to an external power supply. ;

[0089] In application: when measurement is required: input a forward rotation command to the zeroing motor 9 to control 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 moves the spring fixing cylinder 1 upward through thread transmission, so that the metal zero-length spring 10 moves upward; the control terminal remotely inputs a loosening swing command to control the locking swing motor 100 to rotate clockwise; the clockwise rotation of the locking swing motor 100 drives the first locking swing gear 810 to rotate counterclockwise, and the first locking swing gear 810 rotates counterclockwise. A lock pendulum gear 810 drives the second lock pendulum gear 820 to rotate clockwise, and the first lock pendulum gear 810 and the second lock pendulum gear 820 rotate in the opposite direction at the same time, driving the first gear pin 910 and the second gear pin 920 to rotate; the first gear pin 910 and the second gear pin 920 drive the first lock pendulum arm 310 and the second lock pendulum arm 320 to move away from each other; finally, the first lock pendulum clamp 710 and the second lock pendulum clamp 720 on the first lock pendulum arm 310 and the second lock pendulum arm 320 release the lock pendulum member 50, and the lock pendulum motor 9 stops rotating after 3 seconds.

[0090] When the measurement is completed: input a reverse rotation command to the zeroing motor 9 to control 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 moves the spring fixing tube 1 downward through the thread transmission, so that the metal zero length spring 10 moves downward; the control terminal remotely inputs a lock pendulum command to control the lock pendulum motor 100 to rotate counterclockwise, and the lock pendulum motor 100 rotates counterclockwise to drive the first lock pendulum gear 810 to rotate clockwise The first lock pendulum gear 810 drives the second lock pendulum gear 820 to rotate counterclockwise, and the first lock pendulum gear 810 and the second lock pendulum gear 820 rotate in the opposite direction at the same time to drive the first gear pin 910 and the second gear pin 920 to rotate, and the first gear pin 910 and the second gear pin 920 drive the first lock pendulum arm 310 and the second lock pendulum arm 320 to approach each other, and finally the first lock pendulum clamp 710 and the second lock pendulum clamp 720 on the first lock pendulum arm 310 and the second lock pendulum arm 320 lock the pendulum member 50, and the lock pendulum motor 100 stops rotating.

[0091] Embodiment 2:

[0092] Embodiment 2 is substantially the same as Embodiment 1, except that:

[0093] 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.

[0094] 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.

[0095] Embodiment 3:

[0096] Embodiment 3 is substantially the same as Embodiment 1, except that:

[0097] 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.

[0098] 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.

[0099] Embodiment 4:

[0100] Embodiment 4 is substantially the same as Embodiment 1, except that:

[0101] 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.

[0102] Embodiment 5:

[0103] Embodiment 5 is substantially the same as Embodiment 1, except that:

[0104] The support assembly 6 includes a first support column 61, a second support column 62, a third support column 63, a fourth support column 64, a fifth support column 65 and a sixth support column 66, the top of which passes through the upper cover plate 41 and the bottom is installed on the lower cover plate 42; the bottoms of the first support column 61 and the second support column 62 are respectively connected to the left and right sides of the top of the lower cover plate 42; the lower end side periphery of the third support column 63 is rotatably connected to the first lock swing arm 31, and the lower end side periphery of the fourth support column 64 is rotatably connected to the second lock swing arm 32; the bottom of the fifth support column 65 passes through the first lock swing gear 81 and is connected to the top of the lower cover plate 42, and the fifth support column 6 5 is rotatably connected to the first lock pendulum gear 81, the bottom of the sixth support column 66 passes through the second lock pendulum gear 82 and is connected to the top of the lower cover plate 42, and the sixth support column 66 is rotatably connected to the second lock pendulum gear 82; the first support column 61, the second support column 62, the third support column 63, the fourth support column 64, the fifth support column 65 and the sixth support column 66 have the same structure; the first support column 61 includes an upper support column 611 and a lower support column 622, the top of the upper support column 611 passes through the upper cover plate 41, the bottom of the upper support column 611 is connected to the top of the lower support column 622, and the bottom of the lower support column 622 is connected to the top of the lower cover plate 42.

[0105] When used: through the dispersed arrangement of multiple support columns, the pressure on the upper cover plate 41 is evenly distributed, thereby improving the stability of the entire system.

[0106] Embodiment 6:

[0107] Embodiment 6 is substantially the same as Embodiment 1, except that:

[0108] One end of the first locking swing arm 31 is connected to the side of the first ring 311, the inner ring of the first ring 311 is rotatably connected to the outer periphery of the third support column 63, one end of the second locking swing arm 32 is connected to the side of the second ring 321, the inner ring of the second ring 321 is rotatably connected to the outer periphery of the fourth support column 64; the bottom of the first ring 311 and the bottom of the second ring 321 are both connected to the top of the base 33, and the bottom of the base 33 is connected to the top of the lower cover plate 42; the height of the base 33 is the same as the thickness of the first locking pendulum gear 81, and the thickness of the first locking pendulum gear 81 is the same as the thickness of the second locking pendulum gear 82; the cross-section of the base 33 is circular, and its diameter is the same as the diameter of the first ring 311.

[0109] When used: the setting of the base 33 ensures the stability and smoothness of the rotation of the first lock pendulum gear 81 and the second lock pendulum gear 82, and avoids the occurrence of hysteresis when the first lock pendulum gear 81 and the second lock pendulum gear 82 rotate.

[0110] Embodiment 7:

[0111] Embodiment 7 is substantially the same as Embodiment 1, except that:

[0112] A first lock swing clamp 71 is inserted into the side of the first lock swing arm 31, and a second lock swing clamp 72 is inserted into the side of the second lock swing arm 32. The first lock swing clamp 71 and the second lock swing clamp 72 have the same structure and are symmetrically arranged; the first lock swing clamp 71 includes a first insertion rod 711 and a first fixed clamp 712, one end of the first insertion rod 711 passes through the first lock swing arm 31 and is connected to one side of the first fixed clamp 712, and the other side of the first fixed clamp 712 is clamped with the lock swing piece 5; a clamping groove 713 is provided on the side of the first fixed clamp 712 close to the lock swing piece 5, and the clamping groove 713 is clamped with the lock swing piece 5.

[0113] When in use: the height of the first lock swing clamp 71 and the second lock swing clamp 72 is adapted to the height of the locked lock pendulum 5, i.e., the metal zero-length spring; when the upper cover plate 41 and the lower cover plate 42 are installed in the gravimeter, the verticality between them and the lock pendulum 5 must be ensured, otherwise the first lock swing clamp 71 and the second lock swing clamp 72 will clamp the lock pendulum 5, which will cause the lock pendulum 5 to tilt and easily cause permanent damage; when the upper cover plate 41 and the lower cover plate 42 are installed in the gravimeter, care must be taken to ensure that they are concentric with the lock pendulum 5, otherwise the first lock swing clamp 71 and the second lock swing clamp 72 will clamp the lock pendulum 5, which will cause the lock pendulum 5 to translate, and in severe cases, the lock swing clamps may not be able to completely release the lock pendulum.

[0114] 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 metal zero-length spring gravimeter measurement system for field observation, characterized in that: The metal zero-length spring gravimeter measurement system for field observation comprises a spring fixing cylinder (1), a zeroing gear (2), a zeroing gear (3), a pendulum lock positioning member (30), a fixing assembly (40), a transmission assembly, a pendulum lock member (50), a top plate (6), a bracket (7), a zeroing motor (9) and a pendulum lock motor (100); the pendulum lock positioning member (30) comprises a first pendulum lock arm (310) and a second pendulum lock arm (320) which are symmetrically arranged; the fixing assembly (40) comprises an upper cover plate (410) and a lower cover plate (420); and the transmission assembly comprises a first pendulum lock gear (810) and a second pendulum lock gear (820); A zeroing motor (9) is installed at the bottom of the top 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 top plate (6), and the bottom of the bracket (7) is connected to the top of the lower partition (8). The top of the top plate (6) is provided with a connecting groove (61). The top and bottom of the top plate (6) are sequentially provided 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 zero adjustment gear (2). The zero adjustment gear (2) rotates along the connecting groove (61). The bottom of the lower partition (8) is provided with a through hole (81), and the lower end of the metal zero length spring (10) is arranged to pass through the through hole (81). The bottom of the lower partition (8) is connected to the top of the support (71), the bottom of the support (71) is connected to the top of the placement plate (801), the top of the placement plate (801) is connected to the bottom of the metal frame (802), the metal frame (802) is arranged inside the support (71), three positioning bolts (191) are evenly arranged on the lower partition (8), the bottom of the three positioning bolts (191) penetrates the lower partition (8), a pad (19) and is connected to the upper cover plate (410), and the upper cover plate (410) and the lower cover plate (420) are connected via a support assembly (60); A first locking swing arm (310) and a second locking swing arm (320) are installed on the top of the lower cover plate (420); a locking swing member (50) is clamped and arranged between the first locking swing arm (310) and the second locking swing arm (320); the upper cover plate (410) and the lower cover plate (420) are connected via a support assembly (60); a locking swing motor (100) is installed on the top of the upper cover plate (410); the locking swing motor (100) is connected to a control terminal signal; an output shaft of the locking swing motor (100) passes through the upper cover plate (410) and is connected to a transmission pinion (200) in a transmission manner; an outer periphery of the transmission pinion (200) is meshed with a first locking swing gear (810); the first locking swing gear (810) is meshed with a second locking swing gear (820); and the first locking swing gear (810) and the second locking swing gear (820) are movably connected to the lower cover plate (420); A first gear pin (910) is provided on the first lock pendulum gear (810), and the first gear pin (910) rotates clockwise along the first lock pendulum gear (810) to abut against the first lock pendulum arm (310); a second gear pin (920) is provided on the second lock pendulum gear (820), and the second gear pin (920) rotates counterclockwise along the second lock pendulum gear (820) to abut against the second lock pendulum arm (320); A zero adjustment tube (192) is plugged into the pad (19), the bottom of the zero adjustment tube (192) is plugged into the top of the metal frame (802), the metal zero length spring (10) moves longitudinally along the zero adjustment tube (192), a magnetic steel (805) is arranged in the metal frame (802), a circle of copper wire (804) is wound around the outside of the metal frame (802), and the copper wire (804) is electrically connected to an external power supply.

2. The metal zero-length spring gravimeter measurement system for field observation according to claim 1 is characterized in that: A groove (803) is provided on the side of the metal frame (802), and a copper wire (804) is arranged in the groove (803); The metal zero-length spring (10) contacts the magnetic steel (805) downward along the zero adjustment tube (192).

3. The metal zero-length spring gravimeter measurement system for field observation according to claim 1 is 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).

4. The metal zero-length spring gravimeter measurement system for field observation according to claim 3 is characterized in that: The zero adjustment pinion gear (3) comprises a thick shaft (31), a thin shaft (32) and a pinion 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 adjustment motor (9); the outer side of the thick shaft (31) is sleeved with a pinion gear (33); and the pinion gear (33) is meshed with a large gear (21); A pinion fixing frame (5) is provided on the top of the top 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).

5. The metal zero-length spring gravimeter measurement system for field observation according to claim 1 is 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); 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).

6. The metal zero-length spring gravimeter measurement system for field observation according to claim 5 is 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); 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.

7. The metal zero-length spring gravimeter measurement system for field observation according to claim 6 is characterized in that: The support assembly (60) comprises a first support column (610), a second support column (620), a third support column (630), a fourth support column (640), a fifth support column (650) and a sixth support column (660), the top of which passes through the upper cover plate (410) and the bottom of which is mounted on the lower cover plate (420); The bottoms of the first support column (610) and the second support column (620) are respectively connected to the left and right sides of the top of the lower cover plate (420); The side periphery of the lower end of the third support column (630) is rotatably connected to the first lock swing arm (310), and the side periphery of the lower end of the fourth support column (640) is rotatably connected to the second lock swing arm (320); The bottom of the fifth support column (650) passes through the first pendulum lock gear (810) and is connected to the top of the lower cover plate (420); the fifth support column (650) is rotationally connected to the first pendulum lock gear (810); the bottom of the sixth support column (660) passes through the second pendulum lock gear (820) and is connected to the top of the lower cover plate (420); the sixth support column (660) is rotationally connected to the second pendulum lock gear (820); The first support column (610) includes an upper column (6110) and a lower column (6220), wherein the top of the upper column (6110) passes through the upper cover plate (410), the bottom of the upper column (6110) is connected to the top of the lower column (6220), and the bottom of the lower column (6220) is connected to the top of the lower cover plate (420).

8. The metal zero-length spring gravimeter measurement system for field observation according to claim 7 is characterized in that: One end of the first locking swing arm (310) is connected to the side of the first circular ring (3110), and the inner ring of the first circular ring (3110) is rotatably connected to the outer periphery of the third support column (630); one end of the second locking swing arm (320) is connected to the side of the second circular ring (3210), and the inner ring of the second circular ring (3210) is rotatably connected to the outer periphery of the fourth support column (640).

9. The metal zero-length spring gravimeter measurement system for field observation according to claim 8, characterized in that: A first lock swing clamp (710) is inserted into the side surface of the first lock swing arm (310), and a second lock swing clamp (720) is inserted into the side surface of the second lock swing arm (320). The first lock swing clamp (710) and the second lock swing clamp (720) have the same structure and are symmetrically arranged.

10. The metal zero-length spring gravimeter measurement system for field observation according to claim 9, characterized in that: The first lock swing clamp (710) comprises a first insertion rod (7110) and a first fixing clamp (7120); one end of the first insertion rod (7111) passes through the first lock swing arm (310) and is connected to one side of the first fixing clamp (7120); the other side of the first fixing clamp (7120) is clamped to the lock swing member (50); the lock swing member (50) is composed of a lower connecting plate (155), a lower vertical plate (156), and a lower clamping plate (157); A slot (7130) is provided on one side of the first fixing clip (7120) close to the lock swing piece (50), and the slot (7130) is engaged with the lock swing piece (50).

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