An antifreeze displacement monitoring device suitable for ultra-gravity centrifugal environment

Abstract

The invention discloses an antifreeze displacement monitoring device suitable for use in an ultra-gravity centrifugal environment, comprising a sleeve, an iron core rod, and a guide slide, a coil, a guide sleeve, a spring, a drainage conduit and an antifreeze solution arranged in the sleeve; the guide slide, the coil and the guide sleeve are fixedly arranged in the sleeve from top to bottom, the bottom end of the guide sleeve is sealed and connected to the inner bottom surface of the sleeve, the drainage conduit is vertically arranged in the sleeve and located at the outer periphery of the guide sleeve, and the spring and the antifreeze solution are both arranged in the guide sleeve. The invention can be used normally in an ultra-gravity centrifugal environment, and the antifreeze solution is arranged inside the sleeve, and by arranging an antifreeze solution circulation passage, the antifreeze solution is always in a flowing state, so that in an extremely low temperature environment, it can be ensured that the iron core rod will not be frozen, and the normal use of the displacement monitoring device is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of displacement sensors, in particular to an antifreeze type displacement monitoring device suitable for use in an ultra-gravity centrifugal environment. Background Art

[0002] At present, the monitoring of displacement is divided into contact and non-contact. For the geotechnical field, the contact displacement monitoring method is required to measure the displacement inside the soil. Its common structure consists of a movable iron core and three coils. The coil is set in the shell, the outer end of the iron core extends out of the shell, and the inner end of the iron core passes through the three coils. When the iron core moves in the coil, according to Faraday's law of electromagnetic induction, a voltage signal related to the position of the iron core will be generated in the induction coil. It has good linearity, so it is widely used in the field of displacement measurement. However, since the iron core is always in a moving state, it cannot be sealed with the shell. Therefore, when it is in a freeze-thaw cycle, the moisture in the soil will enter the interior of the shell through the gap between the iron core and the shell. In a low temperature environment, it will cause the free water phase to turn into ice, making the iron core unable to move freely. In the mild case, the measurement data is inaccurate, and in severe cases, the iron core will be bent and the sensor will be damaged.

[0003] At the same time, when the displacement sensor is used in an ultra-gravity centrifugal environment, the gravitational acceleration is changed, which causes the sensor core rod to be unable to move freely as in a 1g environment, resulting in serious inaccuracy in the measurement data. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an antifreeze-type displacement monitoring device suitable for ultra-gravity centrifugal environment, which can be used normally in ultra-gravity centrifugal environment and is provided with antifreeze liquid, thereby avoiding the problem of external moisture migration phase change, and effectively solving the problem that the iron core rod inside the sleeve of the displacement monitoring device is easy to freeze, thereby ensuring normal displacement monitoring in low temperature environment and improving the accuracy of monitoring data.

[0005] The technical solution of the present invention is:

[0006] An antifreeze displacement monitoring device suitable for use in an ultra-gravity centrifugal environment comprises a sleeve, an iron core rod, and a guide slide, a coil, a guide sleeve, a spring, a drainage catheter and an antifreeze solution arranged in the sleeve;

[0007] The guide slide, coil and guide sleeve are fixedly arranged in the sleeve from top to bottom, the bottom end of the guide sleeve is sealed and connected to the inner bottom surface of the sleeve, the drainage catheter is vertically arranged in the sleeve and located on the outer periphery of the guide sleeve, and the spring and antifreeze are both arranged in the guide sleeve;

[0008] The guide slide is provided with a guide hole and a drainage hole, the guide hole passes through the top and bottom of the guide slide, a plurality of circles of guide balls are provided on the hole wall of the guide hole, the inlet end of the drainage hole is provided at the bottom end of the guide slide, and the outlet end of the drainage hole is provided on the hole wall of the guide hole;

[0009] The guide sleeve is provided with a drainage outlet and a one-way capillary hole on its tube wall. The drainage outlet is adjacent to the bottom end of the guide sleeve, the bottom end of the drainage catheter is connected to the drainage outlet, the top end of the drainage catheter passes through the outer periphery of the coil and is connected to the inlet end of the drainage hole, the inlet of the one-way capillary hole passes through the outer wall of the guide sleeve, the outlet of the one-way capillary hole passes through the inner wall of the guide sleeve, and the bottom end of the spring is fixedly connected to the inner bottom surface of the sleeve;

[0010] The iron core rod is inserted into the guide sleeve after passing through the guide hole and the coil of the guide slide from top to bottom in sequence, the bottom end of the iron core rod is fixedly connected to the top end of the spring, the antifreeze liquid is arranged in the guide sleeve and is located below the iron core rod, the iron core rod compresses the spring, so that when the spring is compressed to the shortest, the top of the iron core rod is located outside the sleeve, the horizontal height of the bottom end of the iron core rod is higher than the horizontal height of the drainage outlet, and when the spring is not compressed, the horizontal height of the bottom end of the iron core rod is higher than the horizontal height of the unidirectional capillary hole;

[0011] The stiffness k of the spring satisfies the following formula (1):

[0012]

[0013] In formula (1), k1 is the hypergravity influence coefficient, which is a dimensionless parameter. In a 100g hypergravity centrifugal environment, k1=2.1-3.2; G is the shear modulus of the spring material; d is the outer ring diameter of the spring; D is the inner ring diameter of the spring; and n is the effective number of turns of the spring.

[0014] A guide dike and a guide plate are also fixed in the sleeve. The guide dike and the guide plate are located between the guide slide and the coil. The guide plate is arranged horizontally. The annular outer wall of the guide plate is fixedly connected to the inner wall of the sleeve. The bottom end of the guide dike is fixedly connected to the guide plate. A plurality of guide holes that pass through the guide plate are arranged on the outer peripheral part of the guide plate and located at the bottom end of the guide dike. The top of the guide dike is located directly below the bottom end of the guide hole. The core rod passes through the guide hole, the guide dike, the guide plate and the coil of the guide slide from top to bottom in sequence. There is a clearance fit between the guide dike and the core rod, and between the guide plate and the core rod. After the drainage duct passes through the outer periphery of the coil and the guide plate in sequence upward, the top of the drainage duct is connected to the inlet end of the drainage hole.

[0015] The core rod comprises a cylindrical rod, a coupling and a polygonal rod connected in sequence from top to bottom. The cylindrical rod, the coupling and the polygonal rod are all made of iron structures. The bottom end of the cylindrical rod and the top end of the polygonal rod are connected to each other through the coupling. The cross-section of the inner hole of the guide sleeve is consistent with the cross-section shape of the polygonal rod. The polygonal rod is inserted into the inner hole of the guide sleeve and the two are clearance-fitted.

[0016] The kinematic viscosity of the antifreeze solution satisfies the following formula (2):

[0017]

[0018] In formula (2), V represents the velocity field; t represents time; is the Laplace operator; ρ is the density of the antifreeze; P represents the pressure, which is the local static pressure of the antifreeze; is the kinematic viscosity of the antifreeze; n is the multiple under ultra-gravity centrifugal environment. Under 100g ultra-gravity centrifugal environment, n is 100; k3 is the empirical adjustment coefficient of Coriolis acceleration. Under 100g ultra-gravity centrifugal environment, k3 is 0.9-1.2; g is the acceleration of gravity; k5 is the adjustment coefficient between tiny pores, and its value is 0.73-0.94.

[0019] Three coils are arranged between the guide slide and the guide sleeve from top to bottom, namely the first coil, the second coil and the third coil. The second coil is an excitation coil, and the first coil and the third coil are both induction coils. A sinusoidal excitation signal is applied to the second coil. Due to the electromagnetic induction phenomenon, an induced voltage is output in the first coil and the third coil, and the magnitude of the induced voltage varies with the position of the moving core rod, thereby obtaining the displacement data of the core rod.

[0020] The antifreeze liquid is an oily antifreeze liquid.

[0021] The guide slide is provided with a plurality of drainage holes, the inlet ends of the plurality of drainage holes are connected to the total inlet end of the bottom end of the guide slide, the total inlet end of the bottom end of the guide slide is connected to the top of the drainage duct, the outlet ends of the plurality of drainage holes are respectively arranged at different height positions on the guide hole wall, and each drainage hole is located between two adjacent circles of guide balls.

[0022] The guide sleeve has a tube wall provided with a plurality of unidirectional capillary holes, which are respectively arranged at different heights on the tube wall of the guide sleeve. The lowest unidirectional capillary hole is adjacent to the bottom end of the guide sleeve, and the topmost unidirectional capillary hole is arranged at a level lower than the level of the bottom end of the core rod when the spring is in an uncompressed state.

[0023] Advantages of the present invention:

[0024] (1) The present invention provides antifreeze liquid inside the sleeve, and provides an antifreeze liquid circulation passage so that the antifreeze liquid is always in a flowing state, so that in an extremely low temperature environment, the core rod can be ensured not to be frozen, thereby ensuring the normal use of the displacement monitoring device.

[0025] (2) The stiffness of the spring selected in the present invention meets the requirements of displacement testing in an ultra-gravity centrifugal environment. The spring provides a supporting force of corresponding stiffness to the core rod, so that the core rod will not be affected by ultra-gravity, causing the problem that the core rod cannot move normally.

[0026] (3) Since the flow of antifreeze will change significantly under the high-gravity centrifugal environment, the viscosity of the antifreeze is calculated to ensure that it can be used in a normal circulation under the combined effects of extreme low temperature and high gravity.

[0027] (4) The present invention sets a guide slide to limit the vertical movement of the core rod, thereby preventing the core rod from being damaged after being subjected to torque. At the same time, it is connected with the drainage duct to spray the antifreeze liquid that is drained upward onto the core rod, thereby preventing the core rod from freezing in an extremely low temperature environment. At the same time, the antifreeze liquid uses an oily antifreeze liquid, which increases the lubrication effect between the core rod and the slide. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention in an uncompressed state.

[0029] Figure 2 It is a schematic diagram of the structure of the present invention in a compressed state.

[0030] Figure 3 It is a partial structural schematic diagram of the connection between the guide slide and the drainage catheter of the present invention.

[0031] Figure 4 It is a structural schematic diagram of the iron core rod of the present invention.

[0032] Figure 5 It is a plan view of the bottom end of the core rod of the present invention.

[0033] Figure 6 It is a top plan view of the guide sleeve of the present invention.

[0034] Figure 7 It is a schematic diagram of the structure of the present invention arranged in a railway roadbed for displacement monitoring.

[0035] Figure 8 It is a linear graph showing the change of the displacement of the core rod with time when the present invention is arranged under the railway roadbed for displacement monitoring and there is a train load on the ballastless track.

[0036] Figure markings: 1-sleeve, 2-core rod, 3-guide slide, 4-guide dam, 5-guide plate, 6-first coil, 7-second coil, 8-third coil, 9-guide sleeve, 10-spring, 11-drainage duct, 12-coil frame, 21-cylindrical rod, 22-coupling, 23-hexagonal rod, 31-guide hole, 32-drainage hole, 33-guide ball, 91-drainage outlet, 92-unidirectional capillary hole, 01-antifreeze displacement monitoring device, 02-railway roadbed, 03-support rod, 04-ballastless track. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See Figure 1-Figure 6 , an antifreeze displacement monitoring device suitable for use in an ultra-gravity centrifugal environment, comprising a sleeve 1, an iron core rod 2, and a guide slide 3, a guide dike 4, a guide plate 5, three coils, a guide sleeve 9, a spring 10, a drainage catheter 11 and antifreeze fluid arranged in the sleeve 1;

[0039] The three coils are the first coil 6, the second coil 7 and the third coil 8 which are arranged in sequence from top to bottom. The second coil 7 is an excitation coil, and the first coil 6 and the third coil 8 are both induction coils. A sinusoidal excitation signal is applied to the second coil 7. Due to the electromagnetic induction phenomenon, an induced voltage is output in the first coil 6 and the third coil 8.

[0040] The guide slide 3, the guide dike 4, the guide plate 5, the first coil 6, the second coil 7, the third coil 8 and the guide sleeve 9 are fixedly arranged in the sleeve 1 from top to bottom, the bottom end of the guide sleeve 9 is sealed and connected to the inner bottom surface of the sleeve 1, the drainage conduit 11 is vertically arranged in the sleeve 1 and located on the outer periphery of the guide sleeve 9, and the spring 10 and the antifreeze liquid are both arranged in the guide sleeve 9;

[0041] The outer wall of the guide slide 3 is fixedly connected to the inner wall of the sleeve 1. The guide slide 3 is provided with a guide hole 31 and three drainage holes 32. The guide hole 31 passes through the top and bottom ends of the guide slide 3. Three circles of guide balls 33 are provided on the hole wall of the guide hole 31. The inlet ends of the three drainage holes 32 are all connected to the total inlet end of the bottom end of the guide slide 3. The outlet ends of the three drainage holes 32 are respectively arranged at different height positions of the hole wall of the guide hole 31, and each drainage hole 32 is located between two adjacent circles of guide balls 33.

[0042] The guide dike 4 and the guide plate 5 are located between the guide slide 3 and the first coil 6. The guide plate 5 is arranged horizontally. The annular outer wall of the guide plate 5 is fixedly connected to the inner wall of the sleeve 1. The bottom end of the guide dike 4 is fixedly connected to the guide plate 5. A plurality of guide holes penetrating vertically are arranged on the outer peripheral portion of the guide plate 5 and located at the bottom end of the guide dike 4. The top end of the guide dike 4 is located directly below the bottom end of the guide hole 31.

[0043] A coil frame 12 is provided on the inner wall of the sleeve 1, and the first coil 6, the second coil 7 and the third coil 8 are respectively connected to the coil frame 12;

[0044] A drainage outlet 91 and a plurality of unidirectional capillary holes 92 are provided on the tube wall of the guide sleeve 9. The drainage outlet 91 is adjacent to the bottom end of the guide sleeve 9. The bottom end of the drainage conduit 11 is connected to the drainage outlet 91. After the drainage conduit 11 passes through the coil frame 12 and the guide plate 5 in sequence, the top end of the drainage conduit 11 is connected to the total inlet end of the bottom end of the guide slide 3. The inlet of each unidirectional capillary hole 92 passes through the outer wall of the guide sleeve 9. The outlet of each unidirectional capillary hole 92 passes through the inner wall of the guide sleeve 9. The plurality of unidirectional capillary holes 92 are respectively arranged at different heights of the tube wall of the guide sleeve 9. The lowest unidirectional capillary hole 92 is adjacent to the bottom end of the guide sleeve 9. The topmost unidirectional capillary hole 92 is arranged at a horizontal height lower than the horizontal height of the bottom end of the iron core rod 2 when the spring 10 is in an uncompressed state. The bottom end of the spring 10 is fixedly connected to the inner bottom surface of the sleeve 1.

[0045] The core rod 2 passes through the guide hole 31, the guide dike 4, the guide plate 5, the first coil 6, the second coil 7 and the third coil 8 of the guide slide from top to bottom, and then is inserted into the guide sleeve 9. When the core rod 2 moves, the magnitude of the induced voltage output by the first coil 6 and the third coil 8 changes, so that the displacement data of the core rod 2 is obtained through the magnitude of the induced voltage. The guide dike 4 and the core rod 2, and the guide plate 5 and the core rod 2 are all clearance-fitted. The core rod 2 includes a cylindrical rod 21, a coupling 22 and a hexagonal rod 23 connected in sequence from top to bottom. The cylindrical rod 21, the coupling 22 and the hexagonal rod 23 are all iron structures. The bottom end of the cylindrical rod 21 and the hexagonal rod 2 The tops of the core rods 2 and 3 are connected to each other through a coupling 22. The cross section of the inner hole of the guide sleeve 9 is consistent with the cross section of the hexagonal rod 23. The hexagonal rod 23 is inserted into the inner hole of the guide sleeve 9 and the two are clearance-matched. The hexagonal column structure of the core rod 2 limits the core rod 2 to the inner hole of the guide sleeve 9 and cannot rotate in the circumferential direction. The bottom end of the core rod 2 is fixedly connected to the top of the spring 10. The antifreeze liquid is arranged in the guide sleeve 9 and is located below the core rod 2. The core rod 2 compresses the spring 10, so that when the spring 10 is compressed to the shortest, the top of the core rod 2 is located outside the sleeve 1, and the horizontal height of the bottom end of the core rod 2 is higher than the horizontal height of the drainage outlet 91 (see Figure 2 );

[0046] The stiffness k of the spring 10 satisfies the following formula (1):

[0047]

[0048] In formula (1), k1 is the hypergravity influence coefficient, which is a dimensionless parameter. Under a 100g hypergravity centrifugal environment, k1=2.1-3.2; G is the shear modulus of the spring material; d is the outer diameter of the spring; D is the inner diameter of the spring; n is the effective number of coils of the spring;

[0049] The antifreeze liquid is an oily antifreeze liquid, and the kinematic viscosity of the antifreeze liquid satisfies the following formula (2):

[0050]

[0051] In formula (2), V represents the velocity field; t represents time; is the Laplace operator, which is a differential operator used to measure the second-order spatial variation of a scalar or vector field; ρ is the density of the antifreeze; P represents pressure, which is the local static pressure of the antifreeze; is the kinematic viscosity of the antifreeze; n is the multiple under the ultra-gravity centrifugal environment. Under the ultra-gravity centrifugal environment of 100g, n is 100; k3 is the empirical adjustment coefficient of Coriolis acceleration. Under the ultra-gravity centrifugal environment of 100g, k3 is 0.9-1.2; g is the acceleration of gravity; k5 is the adjustment coefficient between tiny pores, which will cause certain changes due to the influence of the actual environment (dust and moisture invasion), and its value is 0.73-0.94.

[0052] See Figure 7 The antifreeze displacement monitoring device 01 of the present invention is set in the railway roadbed 02 and directly below the ballastless track 04. The bottom end of the antifreeze displacement monitoring device 01 is supported by a support rod 03, and then the model box equipped with the above structure is placed in an ultra-gravity centrifugal environment.

[0053] During the ultra-gravity centrifugal experiment, the train wheel load will be applied to the ballastless track 04 for more than 1 million times. Therefore, the iron core rod 2 of the antifreeze displacement monitoring device 01 directly below the ballastless track 04 is always in a state of telescopic movement. At this time, the displacement of the iron core rod 2 changes with time. Figure 8 After the train is loaded, the antifreeze displacement monitoring device 01 monitors the settlement of soil layers at different positions in the railway roadbed 02.

[0054] See Figure 2When the core rod 2 moves downward, the displacement change of the core rod 2 causes the magnitude of the induced voltage output by the first coil 6 and the third coil 8 to change, thereby obtaining the displacement data of the core rod 2 through the magnitude of the induced voltage; as the core rod 2 moves downward, the bottom end of the core rod 2 squeezes the spring 10, and at the same time, the refrigerant liquid in the guide sleeve 9 is pressed into the drainage conduit 11, and the refrigerant liquid is pressed into the three drainage holes 32 of the guide slide 3 along the drainage conduit 11 (see Figure 3 ), and is sprayed out from the outlet ends of the three drainage holes 32, sprayed onto the rod wall of the core rod 2, effectively preventing the guide slide 3 and the core rod 2 from freezing. At the same time, since the refrigerant is an oily refrigerant, the lubrication effect between the core rod 2 and the guide slide 3 can be increased; the refrigerant on the rod wall of the core rod 2 moves down along the rod wall, flows into the guide dike 4, moves down along the inclined surface of the guide dike 4 to the guide plate 5, passes through the guide holes of the guide plate 5, and finally falls on the inner bottom surface of the sleeve 1.

[0055] See Figure 1 When the core rod 2 moves upward, the spring 10 rebounds, and the antifreeze liquid is re-absorbed into the interior of the guide sleeve 9 along the one-way capillary hole 92 of the guide sleeve 9.

[0056] When water enters the sleeve 1, since the antifreeze displacement monitoring device 01 of the present invention is in a supergravity centrifugal environment, the water will be affected by the supergravity and move to the bottom of the sleeve 1. The water will dilute the antifreeze liquid. When there is too much water in the sleeve 1, the antifreeze liquid will mix with the water and move upward, and will not cause the inside of the sleeve 1 to freeze.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments, characterized in that: It includes a sleeve, an iron core rod, and a guide slide, a coil, a guide sleeve, a spring, a drainage catheter and antifreeze fluid arranged in the sleeve; The guide slide, coil and guide sleeve are fixedly arranged in the sleeve from top to bottom, the bottom end of the guide sleeve is sealed and connected to the inner bottom surface of the sleeve, the drainage catheter is vertically arranged in the sleeve and located on the outer periphery of the guide sleeve, and the spring and antifreeze are both arranged in the guide sleeve; The guide slide is provided with a guide hole and a drainage hole, the guide hole passes through the top and bottom of the guide slide, a plurality of circles of guide balls are provided on the hole wall of the guide hole, the inlet end of the drainage hole is provided at the bottom end of the guide slide, and the outlet end of the drainage hole is provided on the hole wall of the guide hole; The guide sleeve is provided with a drainage outlet and a one-way capillary hole on its tube wall. The drainage outlet is adjacent to the bottom end of the guide sleeve, the bottom end of the drainage catheter is connected to the drainage outlet, the top end of the drainage catheter passes through the outer periphery of the coil and is connected to the inlet end of the drainage hole, the inlet of the one-way capillary hole passes through the outer wall of the guide sleeve, the outlet of the one-way capillary hole passes through the inner wall of the guide sleeve, and the bottom end of the spring is fixedly connected to the inner bottom surface of the sleeve; The iron core rod is inserted into the guide sleeve after passing through the guide hole and the coil of the guide slide from top to bottom in sequence, the bottom end of the iron core rod is fixedly connected to the top end of the spring, the antifreeze liquid is arranged in the guide sleeve and is located below the iron core rod, the iron core rod compresses the spring, so that when the spring is compressed to the shortest, the top of the iron core rod is located outside the sleeve, the horizontal height of the bottom end of the iron core rod is higher than the horizontal height of the drainage outlet, and when the spring is not compressed, the horizontal height of the bottom end of the iron core rod is higher than the horizontal height of the unidirectional capillary hole; The stiffness k of the spring satisfies the following formula (1): In formula (1), k1 is the hypergravity influence coefficient, which is a dimensionless parameter. In a 100g hypergravity centrifugal environment, k1=2.1-3.2; G is the shear modulus of the spring material; d is the outer ring diameter of the spring; D is the inner ring diameter of the spring; and n is the effective number of turns of the spring.

2. The antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments according to claim 1, characterized in that: A guide dike and a guide plate are also fixed in the sleeve. The guide dike and the guide plate are located between the guide slide and the coil. The guide plate is arranged horizontally. The annular outer wall of the guide plate is fixedly connected to the inner wall of the sleeve. The bottom end of the guide dike is fixedly connected to the guide plate. A plurality of guide holes that pass through the guide plate are arranged on the outer peripheral part of the guide plate and located at the bottom end of the guide dike. The top of the guide dike is located directly below the bottom end of the guide hole. The core rod passes through the guide hole, the guide dike, the guide plate and the coil of the guide slide from top to bottom in sequence. There is a clearance fit between the guide dike and the core rod, and between the guide plate and the core rod. After the drainage duct passes through the outer periphery of the coil and the guide plate in sequence upward, the top of the drainage duct is connected to the inlet end of the drainage hole.

3. The antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments according to claim 1, characterized in that: The core rod comprises a cylindrical rod, a coupling and a polygonal rod connected in sequence from top to bottom. The cylindrical rod, the coupling and the polygonal rod are all made of iron structures. The bottom end of the cylindrical rod and the top end of the polygonal rod are connected to each other through the coupling. The cross-section of the inner hole of the guide sleeve is consistent with the cross-section shape of the polygonal rod. The polygonal rod is inserted into the inner hole of the guide sleeve and the two are clearance-fitted.

4. The antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments according to claim 1, characterized in that: The kinematic viscosity of the antifreeze solution satisfies the following formula (2): In formula (2), V represents the velocity field; t represents time; is the Laplace operator; ρ is the density of the antifreeze; P represents the pressure, which is the local static pressure of the antifreeze; is the kinematic viscosity of the antifreeze; n is the multiple under ultra-gravity centrifugal environment. Under 100g ultra-gravity centrifugal environment, n is 100; k3 is the empirical adjustment coefficient of Coriolis acceleration. Under 100g ultra-gravity centrifugal environment, k3 is 0.9-1.2; g is the acceleration of gravity; k5 is the adjustment coefficient between tiny pores, and its value is 0.73-0.

94.

5. The antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments according to claim 1, characterized in that: Three coils are arranged between the guide slide and the guide sleeve from top to bottom, namely the first coil, the second coil and the third coil. The second coil is an excitation coil, and the first coil and the third coil are both induction coils. A sinusoidal excitation signal is applied to the second coil. Due to the electromagnetic induction phenomenon, an induced voltage is output in the first coil and the third coil, and the magnitude of the induced voltage varies with the position of the moving core rod, thereby obtaining the displacement data of the core rod.

6. The antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments according to claim 1, characterized in that: The antifreeze liquid is an oily antifreeze liquid.

7. The antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments according to claim 1, characterized in that: The guide slide is provided with a plurality of drainage holes, the inlet ends of the plurality of drainage holes are connected to the total inlet end of the bottom end of the guide slide, the total inlet end of the bottom end of the guide slide is connected to the top of the drainage duct, the outlet ends of the plurality of drainage holes are respectively arranged at different height positions on the guide hole wall, and each drainage hole is located between two adjacent circles of guide balls.

8. The antifreeze displacement monitoring device suitable for use in ultra-gravity centrifugal environments according to claim 1, characterized in that: The guide sleeve has a tube wall provided with a plurality of unidirectional capillary holes, which are respectively arranged at different heights on the tube wall of the guide sleeve. The lowest unidirectional capillary hole is adjacent to the bottom end of the guide sleeve, and the topmost unidirectional capillary hole is arranged at a level lower than the level of the bottom end of the core rod when the spring is in an uncompressed state.

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