KR102285803B1 - Optical fiber sensor cable system for measuring 3 components vibration of seismic profiling - Google Patents

Abstract

The present invention relates to a seismic wave exploration system for measuring and analyzing underground vibrations by installing a fiber optic sensor cable in an observation hole. In particular, the present invention provides a basis for measuring the directionality of vibration by arranging four optical fibers orthogonally to each other and analyzing a signal obtained from each optical fiber. In the present invention, four optical fiber sensors are arranged at 90 degree angular intervals in the observation hole, and each of them provides a configuration that can be closely attached to the wall of the hole.

Description

OPTICAL FIBER SENSOR CABLE SYSTEM FOR MEASURING 3 COMPONENTS VIBRATION OF SEISMIC PROFILING

The present invention relates to seismic exploration among physical exploration methods used to detect the structure, properties, and deposits of the ground, and more particularly, to seismic exploration technology using an optical fiber sensor cable.

Seismic exploration is an exploration that investigates the physical characteristics of underground geological structures or rocks by recording the signals that are reflected or refracted from the underground strata of seismic waves artificially generated on land or at sea. It is used to explore oil, gas, and mineral resources buried underground, or used for engineering purposes to explore cables buried underground.

1 is a view for explaining offshore seismic exploration and land seismic exploration (a), and vertical seismic exploration using a borehole (b).

Referring to FIG. 1, in the conventional seismic survey, a receiver, that is, a geophone or a hydrophone, is inserted and installed in a line or matrix form on the ground or sea level, and artificially vibrates at a specific point. The search was performed by analyzing the signal received by the geophone or hydrophone.

Recently, a method of using an optical fiber as a receiver for vertical seismic exploration has been proposed instead of a geophone or a hydrophone. The structure of a data acquisition system using an optical fiber is shown in FIG. 2 .

Referring to FIG. 2 , in the vertical seismic survey using an optical fiber sensor, an optical fiber is installed in close contact with the ground, and an optical signal (laser) is transmitted through a light source, an optical modulator, and a circulator. The optical signal travels in the forward direction along the optical fiber, but at each point (continuous) of the optical fiber through which the light passes, there is a reflected signal that is reflected backwards by the scattering of the light and returns. That is, the light propagating in the optical fiber collides with the molecules in the optical fiber and is scattered to generate a reflected signal in the reverse direction.

The circulator guides the returned reflected signal (backscattered light) toward the photodetector. The reflected signal in analog form is converted into a digital signal and analyzed by the processor.

In the steady state, the reflected signal shows a certain pattern. When an acoustic wave is applied from the outside, the reflected or refracted acoustic wave acts on the optical fiber and the size, frequency, and phase of scattering (Rayleigh scattering, etc.) change, so the reflected signal is in a steady state. will show a different pattern. That is, the pattern of the reflected signal appears differently depending on the application of the elastic wave. In this way, earthquakes can be identified or the structure of the ground can be analyzed by using the fact that patterns of reflected signals appear differently depending on the presence of seismic waves, amplitudes, and frequencies of seismic waves.

In conventional seismic exploration using geophones or hydrophones, as shown in FIG. 1, refracted and reflected waves can be received only at the point where the receiver is by arranging the receiver at regular intervals (multi-poiny array). If used, the reflected signal can be obtained at all distributed points of the optical fiber. That is, the same effect as when geophones or hydrophones are continuously arranged occurs. Since the optical fiber sensor has a spatial resolution of at least 0.25 m, it can acquire high-density exploration results compared to geophones and hydrophones that have been intermittently deployed.

In addition, since the optical fiber sensor is not affected by electromagnetic interference, it is free from electrical noise compared to the existing coil and electromagnetic induction geophones. In addition, by using light, it is possible to collect signals on a wide scale up to 50 km (1 kHz sample/S), which is more economical and efficient than conventional seismic exploration.

Meanwhile, in the conventional seismic survey, not only the presence of vibration but also the directionality of vibration can be measured using a three-component geophone as shown in FIG. 3 . Three-component vibration measurement is very important in seismic exploration. In other words, by three-dimensionally grasping the actual seismic wave (P-/S-wave) behavior at a point in the strata through three-component measurement, the lithological characteristics of the strata, the anisotropy of the rock phase and fracture zone, and the influence of fluid saturation can be more precisely analyzed. Because it can be analyzed. In addition, by recording and analyzing earthquakes, it is essential to measure the three components of P-wave, S-wave, and coda in order to determine the magnitude, focal mechanism, and seismicity of an earthquake.

Accordingly, research on directional exploration is being conducted in distributed sensing systems using optical fiber sensors. In the case of the land geophone shown in FIG. 3, the directionality of vibration can be measured by installing a coil to match the three directions, but since the optical fiber sensor has a long optical cable, three components (X-axis, Y-axis, Z Axial) There is a problem in that it is structurally not easy to measure the vibration separately.

Due to these difficulties, only a technical concept for three-component vibration measurement using an optical fiber sensor has been derived, and commercialization has not been made.

An object of the present invention is to provide an optical fiber sensing cable system for measuring a three-component vibration that can not only measure vibration through a distributed sensor using an optical fiber, but also measure the direction of vibration in order to solve the above problems.

On the other hand, other objects not specified in the present invention will be further considered within the range that can be easily inferred from the following detailed description and effects thereof.

An optical fiber cable system for measuring three-component vibration according to an embodiment of the present invention for achieving the above object includes: a casing inserted into an observation hole; A clamping unit having a fiber optic sensor cable mounted on the outside, movable between a first position in close contact with the cavity wall of the observation hole and a second position spaced apart from the cavity wall, and including a plurality of clampers installed at intervals of 90° to the casing; an expansion driving unit for moving the clamping unit between the first position and the second position; a rotation driving unit for rotating the casing; and a sensor for measuring the installation orientation of the casing;

According to the present invention, three clamping parts are arranged at 90° angular intervals as A clamper, B clamper, and C clamper, and the Y-axis vibration is measured in the horizontal plane by the optical fiber sensor cable mounted on the A clamper and B clamper, The X-axis vibration in the horizontal plane is measured by the optical fiber sensor cable attached to the B clamper and the C clamper.

In addition, the clamping unit further includes a D clamper, and can measure the vibration of the Z axis orthogonal to the X axis and the Y axis by means of an optical fiber sensor cable mounted on the D clamper.

In an example of the present invention, the A clamper and the C clamper may be disposed at different heights or on the same plane as the B clamper and the D clamper.

In an example of the present invention, the expansion driving unit is coupled to a motor installed in the casing, a lifting shaft moving up and down by the motor, and one end is rotatably coupled to a position fixed in the casing, and the other end is the clamper. a first link member slidably and rotatably coupled to the upper portion of the , the other end is provided with a second link member rotatably coupled to the lower portion of the clamper, and when the elevating shaft descends, the first link member and the second link member are spread apart to move the clamper horizontally toward the hole wall of the observation hole. make it

In an example of the present invention, the rotation driving unit may rotate the casing in both directions in a forward direction and a reverse direction. More specifically, the rotary driving unit may use a nozzle installed in at least one of the plurality of clampers to spray air.

In particular, the clamping part includes A clampers and C clampers that are arranged on both sides of the X axis in a horizontal plane, and B clampers and D clampers that are arranged on both sides on the Y axis in a horizontal plane, and the air nozzle is one of the A clamper and the C clamper. It may be installed in at least one to apply a rotational force in a forward direction, and may be installed in at least one of the B clamper and the D clamper to apply a rotational force in a reverse direction.

In an example of the present invention, the sensor may measure the orientation in which the casing is installed using a geomagnetic sensor.

In an example of the present invention, a plurality of measurement modules are installed to be spaced apart from each other along the depth direction of the observation hole.

The present invention provides an optical fiber sensor cable system 100 for measuring the directionality of vibration. By arranging four optical fibers orthogonally to each other, the directionality of vibration can be measured by vector combination of signals obtained from each optical fiber. The measurement of the directionality of vibration in a distributed sensing system using an optical fiber remains a problem to be solved in the related art, and the present invention has great significance in providing a basis for solving this problem.

In addition, the present invention has the advantage of removing noise from signals obtained in a distributed sensing system using optical fibers and ensuring reliability by providing a mechanical configuration that can attach four optical fibers to the hollow wall of the observation hole very simply.

In addition, the present invention has the advantage that the installation and removal of the optical fiber is very easy, so that the technical utilization of the distributed sensing system can be further activated.

On the other hand, even if it is an effect not explicitly mentioned herein, it is added that the effects described in the following specification expected by the technical features of the present invention and their potential effects are treated as described in the specification of the present invention.

1 is a schematic diagram for explaining the principle of seismic exploration.
2 is a schematic diagram for explaining the configuration (structure) of an acoustic wave data acquisition system using an optical fiber sensor.
3 is a photograph of a conventional three-component geophone for directional exploration.
4 is a cross-sectional view of a state in which an optical fiber sensor cable system for three-component vibration measurement is installed in an observation hole according to an embodiment of the present invention.
5 is a schematic enlarged cross-sectional view of a measurement module, which is a main part of the optical fiber sensor cable system shown in FIG. 4 .
6 is a view showing a state in which the measurement module is in close contact with the observation hole wall in the state of FIG. 5 .
7 is a perspective view for explaining the expansion driving unit.
8 is a schematic cross-sectional view taken along line AA of FIG. 5 .
9 is a schematic cross-sectional view taken along line BB of FIG. 6 .
10 is a schematic cross-sectional view for explaining the rotational driving of the measurement module.
11 and 12 are diagrams for explaining the directionality of vibration by a combination of optical fiber sensors.
※ It is revealed that the accompanying drawings are exemplified as a reference for understanding the technical idea of the present invention, and the scope of the present invention is not limited thereby.

The present invention relates to an optical fiber sensor cable system for seismic exploration. In particular, it relates to a system using an optical fiber as a sensor by inserting an optical fiber into an observation hole or a borehole formed by drilling the ground. It is intended to be used not only for seismic exploration in a narrow sense, which investigates the ground structure by generating vibrations artificially, but also for observing ground vibrations such as earthquakes.

Seismic exploration using optical fiber sensors is currently in the early stages of research and development, and various attempts are being made to increase accuracy and efficiency.

In particular, the present invention focused on measuring the directionality of vibration by optical fiber sensing, and led to the development of an optical fiber sensor cable system for measuring three-component vibration.

In addition, in the optical fiber sensor cable system, it is very important to attach the optical fiber to the hollow wall of the observation hole. When making an observation hole, cementing is generally performed on the inner wall, and it is advantageous for the optical fiber sensor cable to be buried in the cementing. Of course, if it is planned to use the optical fiber sensor system from the beginning, the above method will be taken. However, in order to apply the optical fiber sensor cable system to the already completed observation hole, a separate mounting structure is required.

This is because, when the optical fiber sensor cable is inserted into the observation hole without a separate mounting structure, the accuracy of measurement cannot be guaranteed due to various noises. For example, when vibration is generated using an elastic wave source, the optical fiber sensor receives reflected or refracted waves reflected by underground strata or structures and performs analysis. However, when the ground surface is shaken by the seismic source, the fiber optic sensor cable is shaken by the ground wave, and so-called cable wave is generated. It is difficult to measure.

In order to exclude the above cable wave or water wave, it is advantageous to attach the sensor cable to the inner wall of the observation hole.

An object of the present invention is to improve the accuracy of seismic exploration using optical fibers by providing a system capable of attaching a fiber optic sensor cable having a unique structure for three-component vibration measurement to the pore wall of a completed observation hole.

Hereinafter, an optical fiber sensor cable system for measuring three-component vibration according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

However, in the description of the present invention, if it is determined that the subject matter of the present invention may be unnecessarily obscured as it is obvious to those skilled in the art with respect to related known functions, the detailed description will be omitted.

4 is a cross-sectional view of a state in which an optical fiber sensor cable system for three-component vibration measurement is installed in an observation hole according to an example of the present invention, and FIG. 5 is a schematic enlargement of a measurement module, which is a main part of the optical fiber sensor cable system shown in FIG. It is a cross-sectional view, and FIG. 6 is a view showing a state in which the measurement module is in close contact with the observation hole wall in the state of FIG. 5 .

Referring to the drawings, the optical fiber sensor cable system 100 (hereinafter referred to as an 'optical fiber sensor cable system') for measuring three-component vibration according to an embodiment of the present invention includes a plurality of measurement modules 90 . A plurality of measurement modules 90 are arranged to be spaced apart from each other along the height direction of the observation hole (h). The measurement modules 90 may be interconnected by a rope (not shown), and may be connected by a plurality of air supply lines (1,2,3) as in this example. The three air supply lines (1,2,3) pass through all the measurement modules (90) and provide compressed air. Each air supply line will be described later.

The optical fiber sensor cable 4 is formed to be long and is mounted on the outside of the plurality of measurement modules 90 . In this example, four optical fiber sensors are installed at intervals of 90° with respect to the center of the measurement module. More specifically, a plurality of clampers 21 , 22 , 23 , 24 are installed at intervals of 90° on the outer surface of each measurement module 90 , and the optical fiber sensor cable 4 is mounted to each clamper. .

The measurement module 90 includes a casing, a clamping part, an expansion driving part, a rotation driving part, and a sensor.

The casing 10 is formed to have an elongated substantially cylindrical shape, and provides a space in which elements to be described later are mounted. The air supply lines (1,2,3) pass through the casing 10 of each measurement module 90 and interconnect the casings. In this example, penetrating portions are formed on both sides of the center of the casing 10 , and through portions are formed on both sides of the lower portion, respectively. The four penetrations are vertically arranged at an angle of 90 degrees when viewed from above.

The clamping part consists of four clampers arranged at an angle of 90 degrees to each other. Although only three clampers may be arranged, in this example, as shown in FIGS. 5 and 8, four clampers, namely A clampers 21, B A clamper 23 , a C clamper 22 , and a D clamper 24 are provided.

The clampers 21 to 24 are vertically elongated in the shape of a bar, which is installed in each through-portion of the casing 10, and the first to be in close contact with the wall w of the observation hole h by an expansion driving part to be described later. The position is movable on a horizontal plane between the position and the second position spaced apart from the hollow wall. In this example, the A clamper 21 and the C clamper 22 are arranged on the same plane at the center of the casing 10 , and the B clamper 23 and the D clamper 24 are on the same plane at the bottom of the casing 10 . placed on top As previously described, the optical fiber sensor cable 4 is mounted on the outer surface of each clamper 21 to 24 . The clamper moves to the first position to press and close the optical fiber sensor cable 4 to the wall w of the observation hole h.

The expansion driving unit is for providing a driving force to move the clampers 21 to 24 between the first position and the second position.

The expansion drive unit includes a motor (31). The motor 31 is installed inside the casing 10 . In this example, the motor 31 is an air motor driven by compressed air and is connected to two air supply lines 2 and 3 . When compressed air is supplied through the air supply line 2 on one side, the motor rotates in the forward direction and discharges the air through the air supply line 3 on the other side. If the air supply line (2, 3) is to function in the reverse direction, it rotates in the reverse direction. The lifting shaft 32 connected to the motor 31 rises and descends according to the rotation direction of the motor.

The first link member 41 is formed to be long in the form of a bar, and one end 33 is rotatably coupled to a fixed position at a specific point in the casing, and the other end is in the height direction of the clampers 21 to 24. It is coupled slidably and rotatably accordingly.

Referring to FIG. 7 , in this example, a fixed shaft 39 is provided along the lifting shaft 32 , and the fixed shaft 39 is arranged side by side with the lifting shaft 32 , but the position is not moved. In this example, one end of the first link member 41 is rotatably coupled to the fixed shaft 39 . Of course, the fixed shaft 39 is not an essential configuration, and one end of the first link member 41 may be rotatably coupled to any part of the casing in a fixed position.

For example, a roller 42 is coupled to the other end of the first link member 41, and a guide groove (not shown) is provided on the side of the clampers 21 to 24, and the roller 42 is inserted into the guide groove to rotate and slide. do.

The second link member 51 is disposed in the opposite direction to the first link member 41, that is, mutually X-shaped as shown in FIG. One end 53 of the second link member 51 is rotatably coupled to the lifting shaft 32 . When the lifting shaft 32 is lifted, it moves in the vertical direction together. The other end 52 of the second link member 51 is rotatable in the clampers 21 to 24, but the position is fixed.

5 is a view showing the initial state of the second position, side of the clampers (21 to 24). In FIG. 6 , a dotted line indicates a state in the second position, and a solid line indicates a state in the first position.

In the second position, the clampers 21 to 24 are inserted into the casing 10 . In this state, when the motor 31 rotates in one direction, the lifting shaft 32 descends, and one end of the second link member 51 descends together. However, since the other end of the second link member 51 is fixed in position, the second link member 51 pushes the clampers 21 to 24 to the first position on the horizontal plane. The first position is a position where the clampers 21 to 24 are in close contact with the hollow wall w. The optical fiber sensor cable 4 mounted on the outside of the clampers 21 to 24 is pressed between the clamper and the hollow wall w to be in close contact with the hollow wall w.

The first link member 41 works similarly. When the clampers 21 to 24 are pushed outward, one end 33 of the first link member 41 is fixed, so the roller 42 at the other end descends along the side surfaces of the clampers 21 to 24 .

The first link member 41 and the second link member 51 are arranged in an X-shape to support the upper and lower sides of the clampers 21 to 24, respectively, so that the clamper can stably move on a horizontal plane.

In this example, the A clamper 21 and the C clamper 22 are arranged at the same height in the central portion of the casing, and the B clamper 23 and the D clamper 24 are arranged at the same height in the lower portion of the casing. Only one motor 31 is installed, and the lifting shaft 32 extends to the B clamper 23 and the D clamper 24 . The first link member 41 and the second link member 51 are respectively installed in the B clamper 23 and the D clamper 24, and are disposed orthogonally to those installed in the A clamper 21 and the C clamper 22. The only difference is that Since the configuration is the same, a description thereof will be omitted.

As described above, in the present invention, the optical fiber sensors are arranged at an angle of 90 degrees by means of four clampers so that they can be firmly attached to the hole wall of the observation hole.

On the other hand, since the present invention is for measuring three-component vibration, the orientation in which the optical fiber is installed is very important. The clampers are arranged orthogonally at 90 degree angular intervals, and the overall orientation must be determined. For example, it is placed in the direction of east, west, south, and north.

To this end, the measurement modules 90 must be individually rotationally driven. The measuring modules are far apart from each other and are only connected by a flexible rope or air supply line, and the inside of the observation hole is often filled with groundwater. Therefore, by individually aligning the directions of the measurement modules 90 , the clampers of all the measurement modules must be accurately arranged in the east, west, south, and north directions.

In the present invention, for this purpose, a rotation driving unit is provided for each measurement module 90 . The rotation driving unit functions to rotate the casing 10 as a whole.

First, the rotation driving unit includes a sensor, in this example, a geomagnetic sensor 82 to measure the orientation of the casing 10 . The earth magnetic field sensor 82 is disposed in the waterproof case 38 and receives power from the battery 81 . According to the azimuth measured by the earth magnetic field sensor 82, the orientation of the clampers arranged orthogonally can be accurately known. The direction control module 83 is also installed in the waterproof case 38 and receives power from the battery 81 . The direction control module 83 may receive compressed air from the air supply line 1 or may have a tank in itself to compress the air. The compressed air is branched into two air lines 84 and 85, and one air line 84 is supplied to the nozzles 61 and 62 for the A clamper 21 and the C clamper 22, and the other air Line 85 is fed to nozzles 71 and 72 for B clamper 23 and D clamper 24 . That is, each of the air lines 84 and 85 is again branched and supplied to the nozzles 61, 62, 71 and 72, respectively.

Reference is made to FIGS. 8 to 10 .

Referring to the drawings, the four clampers 21 to 24 are equipped with nozzles 61 , 62 , 71 , 72 , respectively. The A clamper 21 and the C clamper 22 are installed so that the installation direction of the nozzles 61 and 62 rotates the A clamper 21 and the C clamper 22 clockwise, respectively. Since these are interconnected by a link member, only one may be provided. And the nozzles 71 and 72 installed in the B clamper 23 and the D clamper 24 are installed to rotate counterclockwise. Only one of these needs to be installed. The important point is that it must be possible to rotate the clampers 21, 22, 23, 24 in both clockwise and counterclockwise directions. Since the four clampers are all connected by the lifting shaft 32, it can be considered that there is no problem in aligning the orientation if it can be rotated (360 degrees) in only one direction. Although this configuration is not excluded from the present invention, it is not preferable because the optical fiber sensor cable 4 is twisted. That is, it must be rotated 30 degrees counterclockwise, but if it can only be rotated clockwise, it must be rotated 330 degrees, so that the optical fiber sensor cable is twisted. Accordingly, in this example, it is preferable to include a configuration capable of rotating the clamper in the clockwise and counterclockwise directions.

The direction control module 83 may rotate the clampers clockwise and counterclockwise by selecting the air lines 84 and 85 to which air is supplied using a valve. The direction control module 83 may receive the azimuth measured by the earth magnetic field sensor 82 and operate the air line to place the clamper in the correct position.

If the optical fiber sensor cable system 100 having the above configuration is used, the direction of vibration can be grasped by analyzing the signals obtained from the four optical fiber sensors. That is, as shown in FIGS. 11 and 12 , by combining the signals of the optical fiber sensor cable 4 mounted on the A clamper 21 and the B clamper 23 , the Y-axis vibration is detected in the horizontal plane. And, using the signal measured by the optical fiber sensor cable 4 attached to the B clamper 23 and the C clamper 22, it is possible to grasp the X-axis vibration in the horizontal plane. In addition, the D clamper 24 independently measures the vibration of the Z-axis.

As shown in Fig. 12, the optical signal obtained from the optical fiber sensor mounted on each clamper is divided into two signals, and the divided signals are combined again to measure the vibrations of the X-axis, Y-axis, XY-axis and Z-axis. do.

Since the present invention relates to an apparatus for acquiring the optical signal as described above, a detailed method of measuring the three-component vibration will be omitted.

As described above, the present invention provides an optical fiber sensor cable system 100 for measuring the directionality of vibration. By arranging four optical fibers orthogonally to each other, the directionality of vibration can be measured by vector combination of signals obtained from each optical fiber. The measurement of the directionality of vibration in a distributed sensing system using an optical fiber remains a problem to be solved in the related art, and the present invention has great significance in providing a basis for solving this problem.

In addition, the present invention has the advantage of removing noise from signals obtained in a distributed sensing system using optical fibers and ensuring reliability by providing a mechanical configuration that can attach four optical fibers to the hollow wall of the observation hole very simply.

In addition, the present invention has the advantage that the installation and removal of the optical fiber is very easy, so that the technical utilization of the distributed sensing system can be further activated.

The unexplained reference symbol g is the ground.

The protection scope of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the protection scope of the present invention cannot be limited due to obvious changes or substitutions in the technical field to which the present invention pertains.

100 … Fiber optic sensor cable system for three-component vibration measurement
10 … Casing, 21, 22, 23, 24 … clamper
31 … Air motor, 32 … lift shaft
41 … A first link member, 51 . second link member
61,62 … Nozzle, 71, 72 ... Nozzle
81 … battery, 82 … geomagnetic sensor
83 … Direction control module, 84, 85 … airline
90 … Measuring module 1,2,3 … air supply line
4. Fiber optic sensor cable, g … ground
h … Observer, w … wall

Claims (10)

a casing inserted into the observation hole;
A clamping unit having a fiber optic sensor cable mounted on the outside, movable between a first position in close contact with the cavity wall of the observation hole and a second position spaced apart from the cavity wall, and including a plurality of clampers installed at intervals of 90° to the casing;
an expansion driving unit for moving the clamping unit between the first position and the second position;
a rotation driving unit for rotating the casing; and
An optical fiber sensor cable system for measuring three-component vibration, characterized in that it comprises a measuring module comprising; a sensor for measuring the installation orientation of the casing. According to claim 1,
Three clamping parts are arranged at 90° angular intervals as A clamper, B clamper, and C clamper,
The Y-axis vibration is measured in the horizontal plane by the optical fiber sensor cable mounted on the A clamper and the B clamper, and the X-axis vibration is measured in the horizontal plane by the optical fiber sensor cable attached to the B clamper and the C clamper. Fiber optic sensor cable system for three-component vibration measurement. 3. The method of claim 2,
The clamping unit further includes a D clamper,
An optical fiber sensor cable system for measuring three-component vibration, characterized in that the vibration of the Z-axis orthogonal to the X-axis and the Y-axis is measured by the optical fiber sensor cable mounted on the D-clamper. 4. The method of claim 3,
The optical fiber sensor cable system for measuring three-component vibration, characterized in that the A clamper and the C clamper are disposed at different heights from the B clamper and the D clamper. According to claim 1,
The expansion drive unit,
a motor installed in the casing;
an elevating shaft moving up and down by the motor;
a first link member having one end rotatably coupled in place at a fixed position in the casing and the other end slidably and rotatably coupled to the upper portion of the clamper;
One end is rotatably coupled to the lifting shaft and movable together with the lifting shaft, one end of the first link is disposed above a fixed position, and the other end is a second link rotatably coupled to the lower portion of the clamper. provided with an element,
An optical fiber sensor cable system for measuring three-component vibration, characterized in that when the lifting shaft descends, the first link member and the second link member are spread apart to horizontally move the clamper toward the hollow wall of the observation hole. According to claim 1,
The optical fiber sensor cable system for three-component vibration measurement, characterized in that the rotation driving unit can rotate the casing in both forward and reverse directions. 7. The method of claim 1 or 6,
The rotary drive unit,
An optical fiber sensor cable system for measuring three-component vibration, characterized in that the nozzle is installed in at least one of the plurality of clampers and sprays air. 8. The method of claim 7,
The clamping unit includes B clampers and C clampers disposed on both sides on the X axis in a horizontal plane, and A clampers and B clampers disposed on both sides on the Y axis in a horizontal plane,
The nozzle is installed in at least one of the A clamper and the C clamper to apply a rotational force in the forward direction, and is installed in at least one of the B clamper and the D clamper to apply the rotational force in the reverse direction. Fiber optic sensor cable system. According to claim 1,
The sensor is an optical fiber sensor cable system for measuring three-component vibration, characterized in that it is a geomagnetic sensor. According to claim 1,
The optical fiber sensor cable system for measuring three-component vibration, characterized in that the measurement module is installed in a plurality of spaced apart from each other along the depth direction of the observation hole.

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