A high-precision rock stratum dip angle measuring instrument

Abstract

This invention discloses a high-precision rock stratum dip angle measuring instrument, comprising: a positioning device with a fixing device installed at its lower end, and an outer spherical shell at the center of the fixing device; a measuring device including an outer frame and a measuring spherical shell, wherein the inner walls of the outer spherical shell are symmetrically arranged on the upper and lower sides of the outer frame, and multiple spherical covers are provided on the outer frame, each containing a rolling ball; the measuring spherical shell is placed between the multiple rolling balls, a laser irradiation head is provided on the central ring wall of the measuring spherical shell, a spherical shell frame is provided inside the measuring spherical shell, and a rolling ball is provided on the spherical shell frame to contact the measuring spherical shell; a gravity hemispherical block is provided on the spherical frame located in its lower hemispherical chamber, and a spherical receiver is provided at the center of the upper end of the gravity hemispherical block; and a control device for controlling the measuring spherical shell is provided on the outer spherical shell; a wireless receiver is provided on the positioning device for receiving data from the spherical receiver.

Description

Technical Field

[0001] This invention relates to the field of rock mass deformation monitoring technology, specifically a high-precision rock stratum dip angle measuring instrument. Background Technology

[0002] In fields such as geological exploration, mine safety monitoring, earthquake prediction, and large-scale engineering construction (e.g., tunnels, dams, nuclear power plants), minute changes in the dip angle of rock strata directly reflect the stress state of the Earth's crust, rock mass stability, and geological tectonic activity. Currently, traditional methods for measuring the dip angle of rock strata mainly rely on the following:

[0003] 1. Inclinometers such as the weighted or compass type usually require manual lowering and data reading, have low accuracy, are easily affected by human error, and cannot achieve remote continuous monitoring. They are extremely inconvenient to operate in deep underground holes or harsh environments.

[0004] 2. Tilt sensors based on MEMS (Micro-Electro-Mechanical Systems) or electrolyte principles are widely used in engineering monitoring. However, these sensors are mostly electronic components, and their long-term stability is greatly affected by temperature drift, zero-point drift, and electromagnetic interference. During installation, if the rigid coupling between the sensor housing and the rock strata is not handled properly, minor vibrations or local rock disturbances will directly introduce measurement noise, leading to a decrease in accuracy. In addition, when the sensor tilts with the rock strata, its internal reference benchmark (such as the gravity accelerometer in MEMS) will also rotate with the housing. If there is no absolute horizontal reference for subsequent correction, it is difficult to distinguish whether the rock strata are actually tilting or the sensor's own reference benchmark has shifted.

[0005] 3. Fiber Bragg grating inclinometers, although they have the advantages of being resistant to electromagnetic interference and having good stability, are subject to the cross-sensitivity of fiber Bragg gratings to temperature and stress, have expensive demodulation equipment, and have a complex installation process in drilling, making later maintenance difficult.

[0006] 4. Conventional borehole inclinometers mostly use the principle of multi-point displacement gauges or sliding micrometers to indirectly calculate the rock strata dip by measuring the axial deformation of the borehole. It is difficult to directly and in real time obtain the absolute dip angle change of a specific rock stratum.

[0007] Therefore, it is necessary to provide a high-precision rock dip angle measuring instrument to solve the problems mentioned in the background art. Summary of the Invention

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-precision rock stratum dip angle measuring instrument, comprising:

[0009] The positioning device has a fixing device installed at its lower end, and the fixing device has an outer spherical shell at its center;

[0010] The measuring device includes an outer frame and a measuring spherical shell. The outer frame has symmetrically arranged inner walls of the outer spherical shell. The outer frame has multiple spherical covers, each containing a rolling ball. The measuring spherical shell is placed between the multiple rolling balls. A laser irradiation head is arranged on the central ring wall of the measuring spherical shell. The measuring spherical shell contains a spherical shell frame, which has rolling balls in contact with the measuring spherical shell. The spherical frame has a gravity hemispherical block located in its lower hemispherical chamber. A spherical receiver is located at the center of the upper end of the gravity hemispherical block. The outer spherical shell has a control device for adjusting the measuring spherical shell.

[0011] A wireless receiver, mounted on the positioning device, is used to receive data from the spherical receiver.

[0012] Furthermore, preferably, the fixing device includes:

[0013] Fixed bases are symmetrically arranged at the upper and lower ends of the outer spherical shell;

[0014] The outer tube is horizontally arranged in multiple evenly around the fixed base. The inner tube extends into the outer end of the outer tube. The inner tube and the outer tube are connected by a sensing spring. The outer ends of the corresponding inner tubes on the same side are connected to a side plate.

[0015] Furthermore, as a preferred embodiment, the fixed base is provided with an air chamber communicating with the inner end of the outer tube, and a valve is provided on the inner end of the outer tube. The outer spherical shell wall is provided with a branch air passage that connects the upper and lower air chambers. A valve is provided on the outer end of the inner tube. The lower air chamber is connected to an air inlet passage, which is connected to a gas compression tank. A valve is provided on the air inlet passage.

[0016] Furthermore, as a preferred embodiment, the outer side of the side plate is provided with a shock-absorbing pad.

[0017] Furthermore, preferably, the sensing spring is capable of monitoring its own extension and contraction length.

[0018] Furthermore, preferably, the positioning device includes:

[0019] The hanging pipe has a magnetic ring at its lower end;

[0020] Magnetic ring two is located in a fixed seat above the outer spherical shell, and is set in correspondence with magnetic ring one and can attract each other;

[0021] The elastic sleeve is used to connect the hanging pipe to the upper end of the fixed base.

[0022] Furthermore, preferably, the control device includes:

[0023] Support 1 is connected to the inner wall of the outer spherical shell;

[0024] Motor 1 is mounted on bracket 1. Its output end is equipped with a gear, and a horizontally arranged toothed ring meshes with the gear. Bracket 2 is connected to the toothed ring. Bracket 2 is equipped with an expansion joint. The output end of the expansion joint is connected to motor 2. The output end of motor 2 is connected to ball 2.

[0025] Furthermore, as a preferred embodiment, damping is provided between the ball cover and the rolling ball.

[0026] Compared with the prior art, the present invention provides a high-precision rock stratum dip angle measuring instrument, which has the following beneficial effects:

[0027] 1. In this invention, an independent gravity hemispherical block is set inside the measuring spherical shell. Utilizing its gravity characteristics, the upper circular surface of the hemispherical block remains absolutely horizontal in any state. This design provides a constant reference benchmark for measurement that is unaffected by changes in the attitude of the instrument shell. During measurement, the laser irradiation head emits a laser beam that irradiates the spherical receiver on this absolutely horizontal surface. The tilt angle is calculated by monitoring the displacement of the laser landing point. This fundamentally avoids the benchmark offset problem caused by temperature drift, time drift, or electromagnetic interference of traditional electronic sensors, and achieves high-precision absolute tilt angle measurement.

[0028] 2. The fixing device in this invention achieves rigid coupling with the rock strata through a retractable inner and outer tube structure in conjunction with a sensing spring, ensuring that the instrument deforms synchronously with the rock strata. At the same time, the sensing spring has a buffering function, which can effectively filter out the small vibration impacts of non-structural tilting inside the rock strata, avoiding such disturbances from being directly transmitted to the measuring device and causing slight fluctuations in the laser irradiation head, thus significantly reducing measurement noise. In addition, the measuring spherical shell and the outer spherical shell are connected by a damped rolling ball, forming an integrated structure by friction in the non-adjusted state, which not only ensures responsiveness but also avoids stress interference that may be caused by rigid connection, ensuring the purity and reliability of the measurement data.

[0029] 3. In this invention, the control device enables dual-axis rotation adjustment of the measuring sphere in both horizontal and vertical directions without disassembling the instrument. This design has two major advantages: First, it can accurately preset the laser monitoring slope to be parallel to the rock surface based on the known initial attitude of the rock strata (such as that obtained through core analysis), so that subsequent measurements can directly reflect the relative changes of that layer and are more targeted; Second, during long-term monitoring, if it is necessary to correct the initial benchmark or adapt to the monitoring strategy adjustment, it can be remotely controlled for in-situ recalibration at any time, which greatly improves the instrument's flexibility and the accuracy of long-term monitoring. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the fixing device structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the air intake structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the measuring device structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the control device structure of the present invention;

[0035] In the diagram: 1. Drill hole; 2. Fixing device; 3. Positioning device; 4. Outer spherical shell; 5. Measuring device; 6. Wireless receiver; 21. Fixing base; 22. Gas chamber; 23. Branch airway; 24. Outer pipe; 25. Inner pipe; 26. Sensing spring; 27. Side plate; 28. Gas compression tank; 29. ​​Air inlet; 241. Valve 1; 251. Valve 2; 271. Shock absorber; 291. Valve 3; 31. Hanging pipe; 32. Magnetic ring 1; 33. 34. Elastic sleeve; 55. Magnetic ring II; 56. Outer frame cover; 57. Ball cover; 58. Rolling ball I; 59. Measuring spherical shell; 50. Spherical shell frame; 51. Ball; 52. Gravity hemispherical block; 53. Spherical receiver; 54. Control device; 55. Laser irradiation head; 56. Support I; 57. Motor I; 58. Gear; 599. Gear ring; 590. Support II; 591. Telescopic device; 592. Motor II; 593. Rolling ball II. Detailed Implementation

[0036] Reference Figures 1-5 The present invention provides a technical solution: a high-precision rock stratum dip angle measuring instrument, which includes:

[0037] The positioning device 3 has a fixing device 2 installed at its lower end, and the fixing device 2 has an outer spherical shell 4 at its center;

[0038] The measuring device 5 includes an outer frame cover 51 and a measuring spherical shell 54. The outer frame cover 51 is symmetrically arranged with the inner wall of the outer spherical shell 54. The outer frame cover 51 is provided with multiple spherical covers 52. Rolling balls 53 are installed in the spherical covers 52. The measuring spherical shell 54 is placed between the multiple rolling balls 53. A laser irradiation head 510 is provided on the central ring wall of the measuring spherical shell 54. The measuring spherical shell 54 is provided with a spherical shell frame 55. The spherical shell frame 55 is provided with rolling balls 56 that contact the measuring spherical shell 54. The spherical frame 55 is provided with a gravity hemispherical block 57 located in its lower hemispherical chamber. A spherical receiver 58 is provided at the center of the upper end of the gravity hemispherical block 57. The outer spherical shell 4 is provided with a control device 59 for controlling the measuring spherical shell 54.

[0039] The wireless receiver 6 is mounted on the positioning device 3 and is used to receive data from the spherical receiver 58.

[0040] In other words, when the measuring spherical shell 54 and the rolling ball 53 are in tandem, the measuring spherical shell 54 can roll in all directions. When the spherical shell frame 55, the rolling ball 56 and the measuring spherical shell 54 are in tandem, the spherical shell frame 55 can roll in all directions. The bottom of the gravity hemisphere 57 faces downwards, and under the action of gravity, the bottom of the gravity hemisphere 57 always faces downwards, and the upper circular surface of the gravity hemisphere 57 always faces horizontally. When the measuring spherical shell 54 rotates, the laser irradiation head 510 located above the upper circular surface of the gravity hemisphere 57 can irradiate the spherical receiver 58, and the laser irradiation head 510 received by the spherical receiver 58 forms a monitoring slope.

[0041] Among them, there is friction between the rolling ball 53, the ball cover 52, and the measuring ball shell 54. When the control device 59 needs to control the rotation of the outer ball shell 4, the control device 59 contacts the outer ball shell 4 for control. When the control device 59 does not need to control the rotation of the outer ball shell 4, the control device 59 is in a non-contact state with the outer ball shell 4. At this time, the friction between the rolling ball 53, the ball cover 52, and the measuring ball shell 54 makes the rolling ball 53, the ball cover 52, and the measuring ball shell 54 form an integral structure with the outer ball shell 4. The outer ball shell 4 forms an integral structure with the rock stratum. Therefore, if the rock stratum tilts, it can drive the outer ball shell 4 and the measuring ball shell 54 to change synchronously, thereby changing the position of the laser irradiation head 510 received by the spherical receiver 58, thereby obtaining the tilt state of the rock stratum.

[0042] In this embodiment, a borehole 1 is drilled vertically into the rock stratum. The fixing device 2 is placed into the borehole 1 by the positioning device 3 until it is located in the rock stratum area to be measured with high precision. Then, the fixing device 2 is activated to fix the fixing device 2 and the inner wall of the borehole 1 into a fixed position. Then, according to the known initial tilt state of the rock stratum, the horizontal and vertical circumferential rotation of the measuring spherical shell 54 is controlled by the control device 59, so that the monitoring plane formed by the laser irradiation head 510 is parallel to the known initial tilt state of the rock stratum. Thus, an initial monitoring slope parallel to the initial tilt state of the rock stratum is preset. After that, if the rock stratum deforms and tilts, the measuring device 5 can change synchronously with the rock stratum changes.

[0043] In addition, by setting the control device 59, the monitoring slope formed by the laser irradiation head 510 and the tilt state of the rock strata can be flexibly and conveniently corrected.

[0044] In this embodiment, the fixing device 2 includes:

[0045] Fixed base 21 is symmetrically arranged at the upper and lower ends of the outer spherical shell 4;

[0046] Outer tube 24, multiple tubes are evenly arranged horizontally around the fixed base 21, and an inner tube 25 is inserted into the outer end of the tube cavity. The inner tube 25 and the outer tube 24 are connected by a sensing spring 26. The outer ends of each inner tube 25 on the same side and corresponding to the upper and lower parts are connected to a side plate 27.

[0047] In this embodiment, the outer tube 24 is arranged in four groups in a circle. With the setting of the sensing spring 26, the side plate 27 can play a certain buffering effect when receiving the vibration and impact of the internal structure of the rock layer. Especially for some vibration and impact that do not cause the rock layer to tilt, it can effectively improve the firmness and accuracy of the fixing device 2 and the rock layer. At the same time, it also avoids the slight fluctuation of the position of the laser irradiation head 510.

[0048] In this embodiment, the fixed base 21 is provided with an air chamber 22 that communicates with the inner end of the outer tube 24, and a valve 241 is provided on the inner end of the outer tube 24. The outer spherical shell 4 is provided with a branch air passage 23 that connects the upper and lower air chambers 22. A valve 251 is provided on the outer end of the inner tube 25. The lower air chamber 22 is connected to an air inlet 29. The air inlet 29 is connected to a gas compression tank 28, and a valve 291 is provided on the air inlet 29.

[0049] In this embodiment, valve 241 controls the gas in the gas chamber 22 to enter the outer tube 24, valve 251 controls the gas in the inner tube 25 to exit, and valve 291 controls the gas in the gas compression tank 28 to enter the air intake duct 29. Therefore, by adjusting valve 241, valve 251, and valve 291, the combined length of the inner tube 25 and the outer tube 24 can be changed, thereby independently changing the length between each set of inner tube 25 and outer tube 24, thus maintaining the parallel state between the axis of the fixing device 2 and the borehole 1.

[0050] In addition, the fixing device adopts a pneumatically controlled multi-point independent telescopic structure, which, together with the real-time feedback of the sensing spring, can achieve adaptive leveling in the borehole. By independently controlling the extension length of each set of inner and outer tubes, the attitude of the instrument can be precisely adjusted to ensure that the axis of the entire measuring device remains parallel to the borehole axis. This ensures that the measuring sphere is in a vertical and centered position in the initial state, laying a solid foundation for subsequent high-precision measurements and avoiding initial errors caused by installation tilt.

[0051] In this embodiment, the outer side of the side plate 27 is provided with a shock-absorbing pad 271, which on the one hand improves the firmness of the fixing device 2 and the rock layer, and on the other hand reduces the intensity of the vibration impact of the rock layer transmitted to the fixing device 2.

[0052] In this embodiment, the sensing spring 26 can monitor its own extension and contraction length. That is, by judging the length of the sensing spring 26, the matching length of the inner tube 25 and the outer tube 24 located on the same vertical plane is adjusted synchronously, so that the measuring device 5 is in a vertical state, thereby improving the measurement accuracy.

[0053] In this embodiment, the positioning device 3 includes:

[0054] The lower end of the hanging pipe 31 is equipped with a magnetic ring 32.

[0055] Magnetic ring 24 is located in the fixed seat 21 above the outer spherical shell 4, and is correspondingly arranged with magnetic ring 1 32 and can attract each other;

[0056] The elastic sleeve 33 is used to connect the hanging pipe 31 to the upper end of the fixed base 21;

[0057] Specifically, by using magnetic ring 32 and magnetic ring 34 for adsorption, the position of the fixing device 2 can be adjusted by the hanging pipe 31. When the fixing device 2 is fixed to the rock stratum as an integral structure, magnetic ring 32 and magnetic ring 34 are separated and connected only under the action of elastic sleeve 33, which prevents particles from entering the lower end of the hanging pipe 31 and the upper end of the fixing seat 21. The fixing device 2 is not affected by the elastic sleeve 33 when it changes with the rock stratum.

[0058] In this embodiment, the control device 59 includes:

[0059] Support 1591 is connected to the inner wall of the outer spherical shell 4;

[0060] Motor 1 592 is mounted on bracket 1 591. Its output end is equipped with gear 593. Gear 593 meshes with a horizontally arranged gear ring 594. Bracket 2 595 is connected to gear ring 594. Expansion joint 596 is mounted on bracket 2 595. Motor 2 597 is connected to the output end of expansion joint 596. Ball bearing 2 598 is connected to the output end of motor 2 597.

[0061] In other words, the circumferential rotation position of the ball 298 and / or the measuring spherical shell 54 can be adjusted by the motor 592, and the vertical rotation position of the measuring spherical shell 54 can be driven by the ball 298 driven by the motor 597. The ball 298 can be made to contact or disengage from the measuring spherical shell 54 by the telescopic device 596.

[0062] In this embodiment, damping is provided between the spherical cover 52 and the rolling ball 53 to ensure that the spherical cover 52, the rolling ball 53 and the measuring spherical shell 54 are in an integrated structural state.

[0063] In its specific implementation, it includes the following steps:

[0064] Step 1: Drill vertically to the target depth in the area of ​​the rock stratum to be tested. Lower the instrument using positioning device 2. Positioning device 2 is smoothly placed in by connecting magnetic ring 1 32, magnetic ring 2 34 and elastic sleeve 33. After reaching the predetermined position, start fixing device 2: Gas compression tank 28 fills gas chamber 22 through air inlet 29 and enters outer tube 24 under the control of valve 1 241. Valve 251 at the end of inner tube 25 is closed, driving inner tube 25 to extend outward, so that side plate 27 fits tightly against the inner wall of borehole 1. Each inner tube 25 and outer tube 24 is equipped with a sensing spring 26, which can monitor the extension and contraction of inner tube 25 in real time and buffer the small vibration of rock stratum, ensuring that fixing device 2 and rock stratum form a solid integrated structure and that the entire instrument axis is parallel to the borehole.

[0065] Step 2: After fixing, based on the known initial tilt state of the rock strata, the measuring device 5 is pre-calibrated by the control device 59. The second ball 598 can be driven to contact the measuring spherical shell 54 and drive the measuring spherical shell 54 to rotate around the horizontal and vertical directions. The measuring spherical shell 54 is equipped with a gravity hemisphere 57. Its lower end is always vertically downward under the action of gravity, while the upper circular surface remains absolutely horizontal as a constant reference. The spherical shell frame 55 is supported in the measuring spherical shell 54 by the ball bearings 56, so that the gravity hemisphere 57 can freely maintain a horizontal position. During the calibration process, the measuring spherical shell 54 is adjusted until the laser beam emitted by the laser irradiation head 510 on its ring wall forms a monitoring inclined plane parallel to the initial tilt state of the rock strata on the spherical receiver 58 at the upper end of the gravity hemisphere 57. After calibration, the telescopic device 596 causes the second ball 598 to detach from the measuring spherical shell 54.

[0066] Step 3: Without intervention, the measuring spherical shell 54, through multiple rolling balls 53, cooperates with the spherical cover 52, and maintains relative stillness with the outer spherical shell 4 using a preset frictional force. Since the outer spherical shell 4 is integrated with the fixing device 2 and the rock stratum, when the rock stratum changes its tilt, the measuring spherical shell 54 will rotate synchronously with the rock stratum. At this time, the position of the laser irradiation head 510 on the measuring spherical shell 54 relative to the spherical receiver 58, which always remains horizontal, changes, that is, the point of laser impact on the receiver is displaced, thereby reflecting the change in the tilt angle of the rock stratum in real time. The spherical receiver converts the light signal into data, which is transmitted to the ground terminal through the wireless receiver 6 to achieve high-precision remote monitoring.

[0067] Therefore, in this embodiment, the gravity hemisphere provides an absolute horizontal reference through gravity reference, eliminating external interference. Friction and fixing devices ensure that the measuring sphere and rock strata deform synchronously without relative slippage. The combination of laser irradiation and spherical receiver enables non-contact high-precision angle measurement. The initial monitoring slope can be corrected at any time through the adjustment device to adapt to different rock strata attitudes.

[0068] The above description is merely a preferred embodiment of the invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision rock stratum dip angle measuring instrument, characterized in that, It includes: The positioning device (3) has a fixing device (2) installed at its lower end, and the fixing device (2) has an outer spherical shell (4) at its center. The measuring device (5) includes an outer frame cover (51) and a measuring spherical shell (54). The outer frame cover (51) is symmetrically arranged with the inner wall of the outer spherical shell (4). The outer frame cover (51) is provided with multiple spherical covers (52). A rolling ball (53) is installed in the spherical cover (52). The measuring spherical shell (54) is placed between multiple rolling balls (53). A laser irradiation head (510) is provided on the central ring wall of the measuring spherical shell (54). A spherical shell frame (55) is provided in the measuring spherical shell (54). A rolling ball (56) is provided on the spherical shell frame (55) and contacts the measuring spherical shell (54). A gravity hemispherical block (57) is provided on the spherical frame (55) located in its lower hemispherical chamber. A spherical receiver (58) is provided at the center of the upper end of the gravity hemispherical block (57). A control device (59) for controlling the measuring spherical shell (54) is provided on the outer spherical shell (4). A wireless receiver (6) is mounted on the positioning device (3) and is used to receive data from the spherical receiver (58).

2. The high-precision rock stratum dip angle measuring instrument according to claim 1, characterized in that, The fixing device (2) includes: Fixed base (21) is symmetrically arranged at the upper and lower ends of the outer spherical shell (4); The outer tube (24) is horizontally arranged and evenly arranged around the fixed seat (21). The inner tube (25) extends into the outer end of the tube cavity. The inner tube (25) and the outer tube (24) are connected by a sensing spring (26). The outer ends of the inner tube (25) on the same side and corresponding to each other are connected to a side plate (27).

3. The high-precision rock stratum dip angle measuring instrument according to claim 2, characterized in that, The fixed base (21) is provided with an air chamber (22) that communicates with the inner end of the outer tube (24), and a valve (241) is provided on the inner end of the outer tube (24). The outer spherical shell (4) is provided with a branch air passage (23) that connects the upper and lower air chambers (22). A valve (251) is provided on the outer end of the inner tube (25). The lower air chamber (22) is connected to an air inlet (29). The air inlet (29) is connected to a gas compression tank (28), and a valve (291) is provided on the air inlet (29).

4. The high-precision rock stratum dip angle measuring instrument according to claim 2, characterized in that, The outer side of the side plate (27) is provided with a shock-absorbing pad (271).

5. A high-precision rock stratum dip angle measuring instrument according to claim 2, characterized in that, The sensing spring (26) is capable of monitoring its own extension and retraction length.

6. A high-precision rock stratum dip angle measuring instrument according to claim 2, characterized in that, The positioning device (3) includes: The lower end of the hanging pipe (31) is equipped with a magnetic ring (32). Magnetic ring two (34) is located in the fixed seat (21) above the outer spherical shell (4), and is correspondingly set with magnetic ring one (32) and can attract each other; The elastic sleeve (33) is used to connect the hanging pipe (31) to the upper end of the fixed seat (21).

7. A high-precision rock stratum dip angle measuring instrument according to claim 1, characterized in that, The control device (59) includes: Support 1 (591) is connected to the inner wall of the outer spherical shell (4); Motor 1 (592) is mounted on bracket 1 (591). Its output end is equipped with a gear (593). A horizontally arranged gear ring (594) meshes on the gear (593). A bracket 2 (595) is connected to the gear ring (594). A telescopic device (596) is mounted on the bracket 2 (595). Motor 2 (597) is connected to the output end of the telescopic device (596). A ball 2 (598) is connected to the output end of motor 2 (597).

8. A high-precision rock stratum dip angle measuring instrument according to claim 1, characterized in that, Damping is provided between the ball cover (52) and the rolling ball (53).

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