Falling body adjusting tool for floating type absolute gravimeter

Abstract

The utility model discloses a floating type absolute gravimeter falling body adjusting tool. The falling body adjusting tool comprises a falling body bearing ring, a falling body adjusting device, a suspension supporting structure and a tool support. The falling body is fixedly arranged in the falling body bearing ring; the falling body adjusting device is arranged on the falling body and used for adjusting the mass center of the falling body; the falling body bearing ring is fixed to the tool support in a suspension mode through the suspension supporting structure. According to the floating type absolute gravimeter falling body adjusting tool, the falling body is fixedly installed on the falling body bearing ring, the falling body bearing ring and the falling body on the falling body bearing ring are fixedly supported in a suspension mode, contact friction between the tool and the falling body bearing ring is avoided, the contact friction force is eliminated, meanwhile, the mass center of the falling body is adjusted through the falling body adjusting device, and therefore the falling body adjusting efficiency is improved. The step of measuring by using a high-precision electronic scale is omitted, the adjusting efficiency and the adjusting precision are improved, the centroid deviation of the falling body can be directly observed through gravity, and the centroid deviation observation effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gravimeter, in particular to a floating absolute gravimeter drop body adjusting tool. BACKGROUND

[0002] The drop body is a core component in a high-precision absolute gravimeter, and the adjusting precision of the drop body directly affects the measurement precision of the high-precision absolute gravimeter product, so it is very important to improve the adjusting precision of the drop body. The existing drop body adjusting tool clamps the drop body through an auxiliary tool, adjusts the optical center of the corner cube prism in the drop body first, then measures the mass center deviation of the drop body by using a high-precision electronic scale, and adjusts the adjusting nut at the rear end of the drop body after the measurement, so as to achieve the wireless coincidence of the mass center and the optical center of the drop body. However, the clamping position affects the clamping of the drop body by the auxiliary tool, and the environmental temperature, humidity and environment wind will also affect the measurement value of the electronic scale. Moreover, the most important thing is that the friction of the local contact of the tool support point will also affect the accuracy and sensitivity of the high-precision electronic scale measurement. In addition, repeatedly moving the tool to the electronic scale will also affect the adjusting precision. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a floating absolute gravimeter drop body adjusting tool, which eliminates the influence of the friction of the local contact of the support point of the existing adjusting tool, and also eliminates the use of a high-precision electronic scale for measurement, thereby improving the adjusting efficiency and precision of the drop body.

[0004] The specific technical solutions are as follows:

[0005] The present application provides a floating absolute gravimeter drop body adjusting tool, which eliminates the influence of the friction of the local contact of the support point of the existing adjusting tool, and also eliminates the use of a high-precision electronic scale for measurement, thereby improving the adjusting efficiency and precision of the drop body.

[0006] In some embodiments of the present application, the drop body receiving ring is a circular ring structure, and the drop body receiving ring is sleeved on the outer surface of the drop body.

[0007] In some embodiments of the present application, a fixing hole is arranged on the drop body receiving ring, the fixing hole is communicated between the inner and outer sidewalls of the drop body receiving ring, and an isosceles trapezoidal clamping groove is arranged on the inner sidewall of the drop body receiving ring, the fixing hole and the isosceles trapezoidal clamping groove are respectively arranged at two ends of the drop body receiving ring along the first direction; the drop body is clamped in the isosceles trapezoidal clamping groove, and a fixing screw is arranged through the fixing hole and abuts against the drop body, so as to realize the fixed installation of the drop body in the drop body receiving ring, and make the center axis of the drop body coincide with the center axis of the drop body receiving ring.

[0008] The first direction is perpendicular to the ground.

[0009] In some embodiments of the present application, the falling body includes a falling body main body, a falling body prism, and a threaded rod. The falling body prism is fixedly installed in the falling body main body and exposed to one side of an end cover of the falling body main body. The threaded rod is integrally connected to one side of the falling body main body opposite to the end cover in the second direction. A falling body receiving ring is arranged at the middle part of the falling body main body.

[0010] The falling body adjusting device includes an adjusting nut arranged on the threaded rod. The position of the adjusting nut on the threaded rod is adjusted to adjust the center of mass of the falling body.

[0011] The second direction is perpendicular to the first direction.

[0012] In some embodiments of the present application, the tool support includes a base and an integrated support. The integrated support includes a horizontal part and two vertical parts. The horizontal part is arranged perpendicular to the first direction. The two vertical parts are respectively arranged perpendicular to the two ends of the horizontal part in the third direction. The base is arranged on the end face of the horizontal part away from the two vertical parts. The shape and size of the base match the shape and size of the horizontal part.

[0013] The first direction is perpendicular to the ground. The third direction is perpendicular to the first direction.

[0014] In some embodiments of the present application, the suspension support structure includes a throttle valve, two suspension pins, an air inlet, an air outlet, a main branch air path, and two branch air paths. The end face of the two vertical parts away from the horizontal part is respectively provided with a V-shaped open groove extending in the third direction. The bottom of each V-shaped open groove is respectively provided with an air outlet. The two branch air paths are respectively arranged in the two vertical parts. The air outlet and the branch air path are in communication. The air inlet is arranged on the first side of the base arranged in the second direction. The main branch air path is arranged in the base. The air inlet and the main branch air path are in communication. The two branch air paths are respectively in communication with the main branch air path. The outlet of the throttle valve is in communication with the air inlet. The two suspension pins are respectively arranged at the two ends of the falling body receiving ring in the third direction. The suspension pins are suspended in the V-shaped open groove by the gas ejected from the air outlet, so that the falling body receiving ring is suspended and fixed on the integrated support.

[0015] The first direction, the second direction, and the third direction are perpendicular to each other.

[0016] In some embodiments of the present application, the main branch air path is T-shaped, each of the branch air paths is linear, the first air port of the main branch air path is in communication with the air inlet, the second air port and the third air port of the main branch air path are in communication with the first air ports of the two branch air paths respectively, and the second air ports of the two branch air paths are in communication with the two air outlets respectively.

[0017] In some embodiments of the present application, the tool support includes a bottom support and two side supports, the bottom support is arranged perpendicularly to the first direction, the two side supports are respectively connected to the two ends of the bottom support along the third direction, and the levitation support structure is arranged at the ends of the two side supports away from the bottom support.

[0018] The first direction is a direction perpendicular to the ground, and the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0019] In some embodiments of the present application, the levitation support structure includes electromagnetic levitation coils and permanent magnets, one permanent magnet is arranged at each end of the falling body receiving ring along the third direction, and a plurality of electromagnetic levitation coils are arranged at the ends of the two side supports away from the bottom support, the falling body receiving ring is levitated and fixed on the tool support by the permanent magnets and the electromagnetic levitation coils.

[0020] In some embodiments of the present application, the levitation support structure further includes Hall sensors, and the Hall sensors of the first direction, the second direction and the third direction are arranged at the ends of the two side supports away from the bottom support respectively.

[0021] The beneficial effects of the embodiments of the present application are as follows:

[0022] In the floating absolute gravimeter falling body adjusting tool, the falling body is fixedly installed on the falling body receiving ring, and the falling body receiving ring and the falling body thereon are supported in a levitation manner, so that the contact friction between the tool and the falling body receiving ring is avoided, and the contact friction force is eliminated. At the same time, the mass center of the falling body is adjusted by the falling body adjusting device, so that the step of measuring by using a high-precision electronic scale is omitted, the adjusting efficiency and the adjusting accuracy are improved, and the mass center offset observation effect is improved by directly observing the mass center offset of the falling body by gravity. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0024] Figure 1 A structure schematic diagram of a floating absolute gravimeter drop body adjusting tool provided by an embodiment of the present application;

[0025] Figure 2 A structure schematic diagram of a drop body supporting ring provided by the present application;

[0026] Figure 3 A structure schematic diagram of a drop body provided by the present application;

[0027] Figure 4 A structure schematic diagram of a floating absolute gravimeter drop body adjusting tool provided by an embodiment of the present application;

[0028] The accompanying drawings are described as follows: 100 is a drop body supporting ring, 110 is a fixing hole, 120 is a fixing screw, 130 is an isosceles trapezoidal clamping groove, 200 is a suspension supporting structure, 211 is a throttle valve, 212 is a suspension pin, 213 is a V-shaped open slot, 221 is an electromagnetic suspension coil, 222 is a permanent magnet, 300 is a tool support, 311 is a base, 312 is an integrated support, 313 is a horizontal part, 314 is a vertical part, 321 is a bottom support, 322 is a side support, 400 is a drop body, 410 is a drop body main body, 420 is a drop body prism, 430 is a threaded rod, and 500 is a drop body adjusting device. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The terms “include” and “have” and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusion. For example, the processes, methods, systems, products or devices including a series of steps or units are not limited to the listed steps or units, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or devices.

[0031] This application discloses a floating absolute gravimeter free-fall adjustment fixture, which eliminates the frictional effects of local contact at the fulcrum of existing adjustment fixtures and also eliminates the need for measurement using a high-precision electronic scale, thereby improving the efficiency and accuracy of free-fall adjustment. Detailed descriptions follow.

[0032] Example 1

[0033] Figure 1 – Figure 3 This illustration shows a floating absolute gravimeter free-fall adjustment fixture according to Embodiment 1 of this application. Figure 1 As shown, the free-fall adjustment fixture includes: a free-fall receiving ring 100, a free-fall adjustment device 500, a suspension support structure 200, and a fixture bracket 300. The free-fall receiving ring 100 is used to fix the free-falling body 400, which is fixedly disposed within the free-fall receiving ring 100. The free-fall adjustment device 500 is disposed on the free-falling body 400 and is used to adjust the center of gravity of the free-falling body 400. Meanwhile, the falling body receiving ring 100 in the falling body adjustment fixture is suspended and fixed on the fixture bracket 300 through the suspension support structure 200. On the one hand, by fixing and supporting the falling body receiving ring 100 by suspension, the contact friction between the fixture and the falling body receiving ring can be avoided, eliminating the influence of local contact friction at the existing fixture fulcrum. On the other hand, by suspension, the principle of static balance can be used to more intuitively observe the center of mass shift of the falling body, and the center of mass of the falling body 400 can be adjusted by the falling body adjustment device 500 so that the center of mass of the falling body 400 is infinitely close to the optical center of the corner prism in the falling body 400. This eliminates the need to use a high-precision electronic scale for measurement, and the center of mass shift of the falling body can be directly observed by gravity, which can effectively improve the adjustment efficiency and accuracy.

[0034] In Embodiment 1 of this application, the first direction is perpendicular to the ground, and the third and second directions are mutually perpendicular to the first direction, with the second direction being the extended setting direction of the falling body 400. It should be noted that "perpendicular" in Embodiment 1 of this application is not absolutely perpendicular, but can be 90°±10°.

[0035] In Embodiment 1 of this application, as Figure 1 and Figure 2As shown, the falling body receiving ring 100 is a circular ring structure, and the falling body receiving ring 100 is sleeved on the outer surface of the falling body 400. Further, the falling body 400 is fixedly installed on the falling body receiving ring 100 through the fixing screw 120 and the isosceles trapezoidal clamping groove 130. In detail, the falling body receiving ring 100 is provided with a fixing hole 110, the fixing hole 110 is communicated between the inner and outer side walls of the falling body receiving ring 100, the fixing hole 110 is provided with the fixing screw 120, and correspondingly, the inner side wall of the falling body receiving ring 100 is provided with the isosceles trapezoidal clamping groove 130. The fixing hole 110 and the isosceles trapezoidal clamping groove 130 are respectively arranged at two ends of the falling body receiving ring 100 along a first direction. When the falling body 400 is fixedly assembled, the falling body 400 is clamped in the isosceles trapezoidal clamping groove 130, and the fixing screw 120 is arranged in the fixing hole 110 and abuts against the falling body 400, so as to realize the fixed installation of the falling body 400 in the falling body receiving ring 100, and the center axis of the falling body 400 coincides with the center axis of the falling body receiving ring 100.

[0036] As shown in the embodiment one of the present application, Figure 1 and Figure 3 The falling body 400 includes a falling body main body 410, a falling body prism 420 (i.e. a corner cube prism in the falling body 400) and a threaded rod 430. The falling body prism 420 is fixedly installed in the falling body main body 410, and the falling body prism 420 is exposed to one side of the end cover of the falling body main body 410. The threaded rod 430 is integrally connected to the side of the falling body main body 410 opposite to the end cover along a second direction. The falling body receiving ring 100 is sleeved on the middle part of the falling body main body 410, i.e. the middle part of the falling body main body 410 is clamped in the isosceles trapezoidal clamping groove 130 and is fixedly abutted through the fixing screw 120, so as to realize the fixed installation of the falling body 400 on the falling body receiving ring 100. Further, the falling body adjusting device 500 in the embodiment one of the present application includes an adjusting nut, and the adjusting nut is sleeved on the threaded rod 430. By adjusting the position of the adjusting nut on the threaded rod 430, the center of mass of the falling body 400 is adjusted.

[0037] As shown in the embodiment one of the present application, Figure 1As shown, the tool support 300 comprises a base 311 and an integrated support 312. The integrated support 312 comprises a horizontal part 313 and two vertical parts 314, the horizontal part 313 is arranged perpendicularly to the first direction, and the two vertical parts 314 are respectively connected perpendicularly to the two ends of the horizontal part 313 along the third direction. The base 311 is arranged on the end face of the horizontal part 313 away from the two vertical parts 314, and the shape and size of the base 311 match those of the horizontal part 313. Correspondingly, the suspension support structure 200 comprises a throttle valve 211, two suspension pins 212, an air inlet (not shown in the figure), an air outlet (not shown in the figure), a main branch air path (not shown in the figure), and two branch air paths (not shown in the figure). The air inlet is arranged on the first side of the base 311 along the second direction, the main branch air path is arranged in the base 311, and the air inlet and the main branch air path are in communication, and the outlet of the throttle valve 211 is in communication with the air inlet. In addition, the end faces of the two vertical parts 314 away from the horizontal part 313 are respectively provided with a V-shaped open groove 213 extending along the third direction, i.e., the V-shaped open end of the V-shaped open groove 213 faces away from the base 311 along the first direction. The bottom of each V-shaped open groove 213 is respectively provided with an air outlet, and the two branch air paths are respectively arranged in the two vertical parts 314, and the air outlets and the branch air paths are in communication. The two branch air paths are respectively in communication with the main branch air path, so that clean and stable pressure gas is input, and after the flow is controlled by the throttle valve 211, it enters the falling body adjusting tool, and is sprayed out from the air outlets after passing through the main branch air path and the branch air path in turn. The two suspension pins 212 are respectively arranged at the two ends of the falling body receiving ring 100 along the third direction, and the suspension pins 212 are suspended in the V-shaped open groove 213 by the gas sprayed out of the air outlet. In this process, the gas flow of the air outlet can be controlled by adjusting the throttle valve 211, and the falling body receiving ring 100 and the falling body 400 thereon can be observed and ensured to reach a suspended state, so that the falling body receiving ring 100 is suspended and fixed on the integrated support 312.

[0038] In the specific implementation process, the main branch air path is T-shaped, each branch air path is linear, the first air port of the main branch air path is in communication with the air inlet, the second air port and the third air port of the main branch air path are respectively in communication with the first air ports of the two branch air paths, and the second air ports of the two branch air paths are respectively in communication with the two air outlets. The two branch air paths are symmetrically arranged relative to the main branch air path, so that the clean and stable pressure gas input by the air inlet quickly reaches the two air outlets, and the gas flows of the two air outlets are ensured to be the same, thereby ensuring the stability of the falling body receiving ring 100 and the falling body 400 in the third direction.

[0039] Example two

[0040] Figure 2 – Figure 4A falling body adjusting tool for a floating absolute gravimeter is shown according to an embodiment of the present application. As shown in Figure 4 the falling body adjusting tool includes a falling body receiving ring 100, a falling body adjusting device 500, a suspension support structure 200, and a tool support 300. The falling body receiving ring 100 is used to fix the falling body 400, and the falling body 400 is fixedly arranged in the falling body receiving ring 100. The falling body adjusting device 500 is arranged on the falling body 400 and is used to adjust the center of mass of the falling body 400. At the same time, the falling body receiving ring 100 in the falling body adjusting tool is suspended and fixed on the tool support 300 through the suspension support structure 200. On the one hand, the falling body receiving ring 100 is fixed and supported in a suspended manner, which can avoid the contact friction between the tool and the falling body receiving ring, eliminate the influence of the local contact friction of the existing tool support point, and on the other hand, the suspended manner can more intuitively observe the center of mass offset of the falling body by using the principle of static balance, and the center of mass of the falling body 400 can be adjusted by the falling body adjusting device 500, so that the center of mass of the falling body 400 is infinitely close to the optical center of the pyramid prism in the falling body 400. The step of using a high-precision electronic scale is omitted, the center of mass offset of the falling body can be directly observed by gravity, and the adjustment efficiency and accuracy can be effectively improved.

[0041] In the embodiment one of the present application, the first direction is a direction perpendicular to the ground, the third direction and the second direction are perpendicular to each other, and the second direction is the extending arrangement direction of the falling body 400. It should be noted that the "perpendicular" in the embodiment one of the present application is not absolutely perpendicular, but can be 90°±10°.

[0042] In the embodiment one of the present application, as shown in Figure 2 and Figure 4 the falling body receiving ring 100 is a circular ring structure, and the falling body receiving ring 100 is sleeved on the outer surface of the falling body 400. Further, the falling body 400 is fixedly installed on the falling body receiving ring 100 through the fixing screws 120 and the isosceles trapezoidal clamping grooves 130. In detail, the falling body receiving ring 100 is provided with fixing holes 110 which are communicated between the inner and outer sidewalls of the falling body receiving ring 100, and the fixing screws 120 are arranged in the fixing holes 110. Correspondingly, the isosceles trapezoidal clamping grooves 130 are arranged on the inner sidewall of the falling body receiving ring 100, and the fixing holes 110 and the isosceles trapezoidal clamping grooves 130 are respectively arranged at the two ends of the falling body receiving ring 100 along the first direction. When the falling body 400 is fixedly assembled, the falling body 400 is clamped in the isosceles trapezoidal clamping grooves 130, and the fixing screws 120 are arranged in the fixing holes 110 and abut against the falling body 400, so as to realize the fixed installation of the falling body 400 in the falling body receiving ring 100, and make the center axis of the falling body 400 coincide with the center axis of the falling body receiving ring 100.

[0043] In the embodiment one of the present application, as shown in Figure 3 and Figure 4As shown, the falling body 400 includes a falling body main body 410, a falling body prism 420 (i.e. a corner cube prism in the falling body 400) fixedly installed in the falling body main body 410 and exposed to one side of an end cover of the falling body main body 410, and a threaded rod 430 integrally connected to the falling body main body 410 on a side opposite to the end cover in the second direction. The falling body receiving ring 100 is sleeved on the middle part of the falling body main body 410, i.e. the middle part of the falling body main body 410 is clamped in the isosceles trapezoidal clamping groove 130, and is fixedly abutted by the fixing screw 120, so as to realize the fixed installation of the falling body 400 on the falling body receiving ring 100. Further, the falling body adjusting device 500 in the embodiment one of the application includes an adjusting nut sleeved on the threaded rod 430, and the position of the adjusting nut on the threaded rod 430 is adjusted to adjust the center of mass of the falling body 400.

[0044] In the embodiment two of the application, as shown in the figure, Figure 4 The tool support 300 includes a bottom support 321 and two side supports 322. The bottom support 321 is arranged perpendicularly to the first direction, and the two side supports 322 are respectively arranged perpendicularly to the two ends of the bottom support 321 along the third direction. The levitation support structure 200 is arranged on the ends of the two side supports 322 away from the bottom support 321. Further, the levitation support structure 200 includes electromagnetic levitation coils 221 and permanent magnets 222. The two ends of the falling body receiving ring 100 along the third direction are respectively provided with one permanent magnet 222, and the ends of the two side supports 322 away from the bottom support 321 are respectively provided with a plurality of electromagnetic levitation coils 221. The falling body receiving ring 100 is levitated and fixed on the tool support 300 by the permanent magnets 222 and the electromagnetic levitation coils 221.

[0045] In the specific implementation process, the levitation support structure 200 further includes Hall sensors (not shown in the figure), and the ends of each side support 322 away from the bottom support 321 are respectively provided with Hall sensors in the first direction, the second direction and the third direction, so as to receive magnetic pole information by the Hall sensors to realize closed-loop control of magnetic levitation.

[0046] In summary, the application discloses a floating type absolute gravity meter falling body adjusting tool. The falling body is fixedly installed on the falling body receiving ring, and the falling body receiving ring and the falling body thereon are fixed and supported in a levitation manner, so as to avoid the contact friction between the tool and the falling body receiving ring, and eliminate the contact friction force. At the same time, the center of mass of the falling body is adjusted by the falling body adjusting device, so as to eliminate the step of measuring by using a high-precision electronic scale, improve the adjusting efficiency and adjusting accuracy, and directly observe the center of mass deviation of the falling body by gravity, and improve the observation effect of the center of mass deviation.

[0047] Those skilled in the art can understand that the drawings are only schematic illustrations of an embodiment, and the parts in the drawings are not necessarily essential for implementing the present application. It should be noted that similar reference numerals and letters refer to similar items in the drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0048] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as limiting the present application.

[0049] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, and are not limiting, the protection scope of the present application is not limited thereto, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any skilled person in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacement to some technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope described in the claims.

Claims

1. A floating absolute gravimeter drop adjustment tool, characterized by, The utility model relates to a kind of falling body support ring, falling body adjusting device, suspension support structure and tool support, which are characterized by the following technical solutions. The falling body is fixedly arranged in the falling body support ring. The falling body adjusting device is arranged on the falling body to adjust the center of mass of the falling body. The falling body support ring is suspended and fixed on the tool support by the suspension support structure. The falling body support ring is a circular ring structure, and is sleeved on the outer surface of the falling body.

2. The drop adjustment tool for a floating absolute gravimeter according to claim 1, wherein, The falling body support ring is provided with a fixing hole, which communicates the inner and outer walls of the falling body support ring.

3. The drop adjustment tool for a floating absolute gravimeter according to claim 2, wherein, The isosceles trapezoidal clamping groove is arranged on the inner wall of the falling body support ring. The falling body is clamped in the isosceles trapezoidal clamping groove, and a fixing screw is inserted through the fixing hole to abut against the falling body, so as to realize the fixed installation of the falling body in the falling body support ring, and the center axis of the falling body coincides with the center axis of the falling body support ring.

4. The drop adjustment tool for a floating absolute gravimeter according to claim 3, wherein, The first direction is perpendicular to the ground. The falling body includes a falling body main body, a falling body prism and a threaded rod. The falling body prism is fixedly installed in the falling body main body and exposed on one side of the end cover of the falling body main body.

5. The drop adjustment tool for a floating absolute gravimeter of claim 1, wherein, The threaded rod is integrally connected to the side of the falling body main body opposite to the end cover along a second direction. The falling body adjusting device includes an adjusting nut, which is sleeved on the threaded rod. The position of the adjusting nut on the threaded rod is adjusted to adjust the center of mass of the falling body. The second direction is perpendicular to the first direction. The tool support includes a base and an integrated support. The integrated support includes a horizontal part and two vertical parts. The horizontal part is arranged perpendicular to the first direction. The base is arranged on the end face of the horizontal part away from the two vertical parts. The shape and size of the base match those of the horizontal part. The first direction is perpendicular to the ground. The third direction is perpendicular to the first direction.

6. The drop adjustment tool for a floating absolute gravimeter according to claim 5, wherein, The suspension support structure comprises a throttle valve, two suspension pins, an air inlet, an air outlet, a main air path and two branch air paths, two V-shaped open grooves are arranged at the centers of the end faces of the vertical parts away from the horizontal part, the V-shaped open grooves are arranged along the third direction, the bottoms of each V-shaped open groove are respectively provided with an air outlet, two branch air paths are arranged in the vertical parts, the air outlet is in communication with the branch air path, the air inlet is arranged on the first side face of the base along the second direction, the main air path is arranged in the base, the air inlet is in communication with the main air path, the branch air paths are in communication with the main air path, the outlet of the throttle valve is in communication with the air inlet, the suspension pins are arranged at the two ends of the falling body receiving ring along the third direction, and the falling body receiving ring is suspended and fixed on the integrated support by the gas sprayed out of the air outlet. The first direction, the second direction and the third direction are perpendicular to each other.

7. The drop adjustment tool for a floating absolute gravimeter of claim 6, wherein, The main air path is T-shaped, each branch air path is linear, the first air port of the main air path is in communication with the air inlet, the second air port and the third air port of the main air path are in communication with the first air ports of the two branch air paths, and the second air ports of the two branch air paths are in communication with the two air outlets.

8. The drop adjustment tool for a floating absolute gravimeter of claim 1, wherein, The tool support comprises a bottom support and two side supports, the bottom support is arranged perpendicular to the first direction, the side supports are arranged perpendicular to the ends of the bottom support along the third direction, and the suspension support structure is arranged at the ends of the side supports away from the bottom support. The first direction is perpendicular to the ground, and the first direction, the second direction and the third direction are perpendicular to each other.

9. The drop adjustment tool for a floating absolute gravimeter of claim 8, wherein, The suspension support structure comprises an electromagnetic suspension coil and a permanent magnet, the falling body receiving ring is provided with a permanent magnet at the two ends along the third direction, the side supports are provided with a plurality of electromagnetic suspension coils at the ends away from the bottom support, and the falling body receiving ring is suspended and fixed on the tool support by the permanent magnet and the electromagnetic suspension coil.

10. The drop adjustment tool for a floating absolute gravimeter of claim 9, wherein, The suspension support structure further comprises a Hall sensor, and the side supports are provided with the Hall sensor along the first direction, the second direction and the third direction at the ends away from the bottom support.

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