Three-component microseismic sensor fixing and orienting device and working method thereof

Abstract

This invention discloses a three-component microseismic sensor fixing and orientation device and its working method. The three-component microseismic sensor is fixed in a sensor arrangement chamber, with its three components perpendicular to each other. Simultaneously, the directions of the three components are consistent with the calibration directions of the three-axis coordinates on the azimuth detection assembly cover. The arrangement chamber sleeve is placed inside the borehole and tightly connected to the surrounding area. The sensor arrangement chamber is placed inside the arrangement chamber sleeve. An inclination sensor installed inside the sensor arrangement chamber reads the inclination data of the current sensor arrangement chamber. Simultaneously, using the azimuth detection assembly cover, through rotation and leveling, the coordinate cover and compass cover are aligned on the same horizontal plane, and the azimuth data of the compass is read. This data is combined with the inclination data to accurately determine the azimuth and attitude of the three-component microseismic sensor. This ensures the consistency of the placement of multiple microseismic sensors, ultimately providing accurate data support for subsequent microseismic monitoring and processing.

Description

Technical Field

[0001] This invention belongs to the field of microseismic monitoring technology, specifically relating to a three-component microseismic sensor fixing and orientation device and its working method. Background Technology

[0002] Microseismic source location technology, as one of the most fundamental and critical technologies in the field of microseismic monitoring, is widely used in various engineering fields. Three-component microseismic sensors are devices that measure the linear acceleration and vibration parameters of soil and rock by receiving vibration waves in the X, Y, and Z axes. They are key equipment in microseismic source location technology, and their azimuth and tilt angles significantly affect the accuracy of mass element motion inversion and polarization positioning based on three-component microseismic data.

[0003] The existing method of fixing three-component microseismic sensors involves fixing the sensors to the rock mass or rock wall using clamps. This method results in inconsistent orientations of multiple three-component microseismic sensors, leading to divergent positioning results and making it impossible to accurately determine the specific seismic source location. Furthermore, this method cannot guarantee that the microseismic sensors are in close contact with the bedrock, which can cause the original microseismic activity signals to be undetectable or severely distorted.

[0004] Therefore, the research direction of this invention is to provide a new device and method that can orient the placement of microseismic sensors to ensure the consistency of the placement of multiple microseismic sensors, while also enabling the microseismic sensors to be closely attached to the bedrock to obtain the required original signals of microseismic activity, and ultimately provide accurate data support for subsequent microseismic monitoring and processing. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a three-component microseismic sensor fixing and orientation device and its working method. It can orient the microseismic sensor to ensure the consistency of the orientation of multiple microseismic sensors, and at the same time, it can make the microseismic sensor fit closely with the bedrock to obtain the required original microseismic activity signals, ultimately providing accurate data support for subsequent microseismic monitoring and processing.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a three-component microseismic sensor fixing and orientation device, comprising an orientation detection combined cover, an arrangement chamber sleeve, and a sensor arrangement chamber;

[0007] The sensor arrangement chamber is installed inside the arrangement chamber sleeve, and the sensor arrangement chamber has a groove for placing the three-component micro-vibration sensor and the tilt sensor.

[0008] The orientation detection assembly cover is installed at one end of the sensor arrangement compartment. It includes a compass cover and a coordinate cover. The coordinate cover is installed at the end of the sensor arrangement compartment. One side of the compass cover is movably connected to one side of the coordinate cover, so that the compass cover is stacked on top of the coordinate cover when not in use, and is at the same horizontal plane as the coordinate cover when in use. The compass cover contains a compass for determining orientation. The compass cover is equipped with a compass level for determining the levelness of the compass cover when the compass is in use. The coordinate cover is equipped with coordinates for determining the orientation and attitude of the three-component microseismic sensor in conjunction with the compass. The coordinate cover is equipped with a cover level for determining the levelness of the coordinate cover when in use.

[0009] Furthermore, the sensor arrangement compartment is a cylinder with a groove on its side extending to one end face. The groove is a right-angled sector in the radial section and a rectangle in the axial section. This structure ensures that the three surfaces of the groove are perpendicular to each other, allowing the subsequent placement of the three-component microseismic sensor to maintain the perpendicular orientation of each component after fixation, thus improving the accuracy of the acquired microseismic data.

[0010] Furthermore, the arrangement chamber sleeve is a rectangular shell with an internal cylindrical groove. This shape is used to insert it into a drilled hole, and the gap between the sleeve and the hole is filled by casting, ensuring a tight fit between the arrangement chamber sleeve and the drilled hole. The internal cylindrical groove of the arrangement chamber sleeve allows the sensor arrangement chamber to slide inside.

[0011] Furthermore, the compass level includes a circular bubble box and a compass balance ball, with the balance ball placed inside the circular bubble box. The levelness of the compass cover is determined by whether the balance ball is centered within the circular bubble box. Similarly, the cover level includes a rectangular bubble box and a cover balance ball, with the balance ball placed inside the rectangular bubble box. The levelness of the coordinate cover is determined by whether the rectangular balance ball is centered within the rectangular bubble box. This structure not only facilitates installation but also allows for quick and easy determination of the levelness of the compass cover and coordinate cover.

[0012] Furthermore, the coordinates are the X-axis, Y-axis, and Z-axis, and the orientation of each of the three axes is the same as the orientation of the three detection components of the three-component microseismic sensor; the orientation of the 0° mark on the compass is the same as the orientation of the X-axis. This setup further ensures the accuracy of determining the azimuth value of the three-component microseismic sensor.

[0013] Furthermore, one side of the coordinate cover is connected to the other side of the compass cover via a hinge. This structure is not only convenient to use, but also has a long service life.

[0014] Furthermore, the sleeve of the arrangement chamber is equipped with a built-in coil, and the three-component micro-vibration sensor and the tilt sensor are respectively connected to an external data acquisition terminal through the built-in coil for transmitting the acquired data.

[0015] The working method of the above-mentioned three-component micro-vibration sensor fixing and orientation device is characterized by the following specific steps:

[0016] Step 1: Select the required monitoring location and drill a hole until the bedrock is reached to reduce the impact of microseismic wave attenuation caused by soft strata. Then, fix the sensor placement chamber sleeve in the borehole by casting. The fixing device of the sensor placement chamber and the azimuth detection combination cover can be flexibly removed.

[0017] Step 2: Fix the three-component micro-vibration sensor and tilt sensor in the groove of the sensor arrangement chamber, ensuring a seamless fit with the groove wall. The three-component micro-vibration sensor and tilt sensor are connected to the data acquisition terminal through built-in coils. Then, install the orientation detection combination cover at one end of the sensor arrangement chamber and place the sensor arrangement chamber inside the arrangement chamber sleeve.

[0018] Step 3: Flip the compass cover to open the azimuth detection assembly cover. First, adjust the coordinate cover to keep it level using the level indicator on the cover. Then, adjust the compass cover to be on the same horizontal plane as the coordinate cover using the level indicator on the compass. At this time, the orientation of the 0° mark on the compass is the same as the orientation of the X-axis. Read the degree by which the compass north needle deviates from the 0° mark and combine it with the tilt angle value of the tilt sensor. This is the azimuth attitude of the three-component microseismic sensor. Microseismic monitoring will then begin based on the current azimuth attitude.

[0019] Step 4: After the microseismic monitoring test is completed, remove the sensor placement chamber and azimuth detection combination cover from the placement chamber sleeve for reuse in subsequent tests.

[0020] Compared with existing technologies, the present invention adopts a combination of orientation detection combined cover, arrangement chamber sleeve and sensor arrangement chamber, which has the following advantages:

[0021] 1. The sensor arrangement chamber of this invention has a groove structure with three mutually perpendicular sides, which ensures that the three components of the three-component micro-vibration sensor remain perpendicular to each other after being fixed in the groove, and the directions of the three components are consistent with the calibration direction of the three-axis coordinates on the azimuth detection combination cover. The arrangement chamber sleeve is placed in the drill hole and can be tightly connected to the surrounding area of ​​the drill hole. Then, the sensor arrangement chamber is placed in the cylindrical groove of the arrangement chamber sleeve. The tilt angle data of the current sensor arrangement chamber can be read by the tilt angle sensor installed in the sensor arrangement chamber. At the same time, by rotating and leveling the azimuth detection combination cover, the coordinate cover and the compass cover are both on the same horizontal plane, and the azimuth data of the compass is read. This data is combined with the tilt angle data to accurately determine the azimuth attitude of the three-component micro-vibration sensor. Subsequently, micro-vibration monitoring work is started based on the current azimuth attitude.

[0022] 2. Because this invention can accurately determine the orientation and attitude of the three-component microseismic sensor during microseismic monitoring, it can ensure the consistency of the orientation of multiple microseismic sensors during the deployment of a microseismic network. At the same time, it can ensure that the microseismic sensor is in close contact with the bedrock to obtain the required raw signals of microseismic activity, ultimately providing accurate data support for subsequent microseismic monitoring and processing. In addition, this invention has a simple structure, is easy to implement, and is suitable for widespread application in complex engineering geological conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the orientation detection combination cover of the present invention in use;

[0025] Figure 3 This is a schematic diagram of the structure of the sensor arrangement compartment and the orientation detection combined cover in this invention;

[0026] Figure 4 This is a schematic diagram of the structure of the storage sleeve in this invention.

[0027] In the diagram: 1. Azimuth detection assembly cover; 11. Coordinate cover; 111. Coordinate; 12. Compass cover; 121. Compass; 122. Compass north needle; 13. Hinge; 14. Rectangular bubble box; 141. Cover balance ball; 15. Circular bubble box; 151. Compass balance ball; 2. Arrangement chamber sleeve; 3. Sensor arrangement chamber; 4. Three-component micro-vibration sensor; 5. Tilt sensor; 6. Built-in coil. Detailed Implementation

[0028] The present invention will be further described below.

[0029] like Figure 1 As shown, a three-component microseismic sensor fixing and orientation device includes an orientation detection combined cover 1, an arrangement chamber sleeve 2, and a sensor arrangement chamber 3.

[0030] like Figure 4 As shown, the sensor arrangement chamber 3 is installed inside the arrangement chamber sleeve 2. A groove is formed on the sensor arrangement chamber 3 to hold the three-component microseismic sensor 4 and the tilt sensor 5. The sensor arrangement chamber 3 is a cylinder with a groove on its side extending to one end face. The groove is a right-angled sector in the radial section and a rectangle in the axial section of the cylinder. This structure ensures that the three surfaces of the groove are perpendicular to each other, allowing the three-component microseismic sensor 4 to maintain its orientation after each component is fixed, thus improving the accuracy of the acquired microseismic data.

[0031] like Figure 3As shown, the orientation detection assembly cover 1 is installed at one end of the sensor arrangement chamber 3. It includes a compass cover 12 and a coordinate cover 11. The coordinate cover 11 is installed at the end of the sensor arrangement chamber 2. One side of the compass cover 12 is movably connected to one side of the coordinate cover 11, so that the compass cover 12 is stacked on top of the coordinate cover 11 when not in use, and is on the same horizontal plane as the coordinate cover 11 when in use. The compass cover 12 is equipped with a compass 121 for determining orientation. The compass cover 12 is equipped with a compass level for determining the levelness of the compass cover 12 when the compass is in use. The coordinate cover 11 is equipped with a coordinate 111 for cooperating with the compass 121 to determine the orientation and attitude of the three-component micro-vibration sensor 4. The coordinate cover 11 is equipped with a cover level for determining the levelness of the coordinate cover 11 when in use. The compass level includes a circular bubble box 15 and a compass balance ball 151. The compass balance ball 151 is placed inside the circular bubble box 15. The levelness of the compass cover 12 is determined by whether the compass balance ball 151 is centered in the circular bubble box 15. The cover level includes a rectangular bubble box 14 and a cover balance ball 141. The cover balance ball 141 is placed inside the rectangular bubble box 14. The levelness of the coordinate cover 11 is determined by whether the rectangular balance ball 141 is centered in the rectangular bubble box 14. This structure not only facilitates installation but also allows for quick determination of the levelness of the compass cover 12 and the coordinate cover 11.

[0032] As an improvement of the present invention, the arrangement chamber sleeve 2 is a rectangular shell with a cylindrical groove inside. This shape is used to fill the gap between the sleeve and the drill hole by casting, ensuring a tight fit between the arrangement chamber sleeve 2 and the drill hole. The cylindrical groove inside the arrangement chamber sleeve 2 allows the sensor arrangement chamber 3 to slide inside. One side of the coordinate cover 11 is connected to one side of the compass cover 12 via a hinge 13. This structure is not only convenient to use but also has a long service life. The arrangement chamber sleeve 2 contains a built-in coil 6. The three-component micro-vibration sensor 4 and the tilt sensor 5 are respectively connected to an external data acquisition terminal through the built-in coil 6 for transmitting the acquired data.

[0033] As another improvement of the present invention, the coordinates are the X-axis, Y-axis, and Z-axis, and the orientation of each of the three axes is the same as the orientation of the three detection components of the three-component microseismic sensor 4; the orientation of the 0° mark on the compass 121 is the same as the orientation of the X-axis. This arrangement further ensures the accuracy of determining the azimuth value of the three-component microseismic sensor 4.

[0034] The working method of the above-mentioned three-component micro-vibration sensor fixing and orientation device includes the following specific steps:

[0035] Step 1: Select the required monitoring location and drill a hole until the bedrock is reached to reduce the impact of microseismic wave attenuation caused by soft strata. Then, fix the placement chamber sleeve 2 in the borehole by casting. The fixing device of the sensor placement chamber 3 and the azimuth detection combination cover 1 can be flexibly removed.

[0036] Step 2: Fix the three-component micro-vibration sensor 4 and tilt sensor 5 in the groove of the sensor arrangement chamber 3 with a coupling agent, ensuring a seamless fit with the groove wall. The three-component micro-vibration sensor 4 and tilt sensor 5 are respectively connected to the data acquisition terminal through the built-in coil 6. Then, install the orientation detection combination cover 1 at one end of the sensor arrangement chamber 3 and place the sensor arrangement chamber 3 inside the arrangement chamber sleeve 2.

[0037] Step 3, as follows Figure 2 As shown, flip the compass cover 12 to open the azimuth detection combination cover 1. First, adjust the coordinate cover 11 so that the balance ball 141 of the cover is placed at the center of the rectangular bubble box 14. At this time, the coordinate cover 11 is in a horizontal state. Then, adjust the compass cover 12 so that the compass balance ball 151 is located at the center of the circular bubble box 15. At this time, it is on the same horizontal plane as the coordinate cover 11. At this time, the orientation of the 0° mark of the compass 121 is the same as the orientation of the X-axis. Read the degree of deviation of the compass north needle 122 from the 0° mark and combine it with the tilt angle value of the tilt sensor 5. This is the azimuth attitude of the three-component microseismic sensor 4. Then, microseismic monitoring work will begin based on the current azimuth attitude.

[0038] Step 4: After the microseismic monitoring test is completed, remove the sensor placement chamber 3 and the azimuth detection combination cover 1 from the placement chamber sleeve 2 for reuse in subsequent tests. Only the placement chamber sleeve 2 is left in the borehole, which can be used as a fixed microseismic monitoring station for subsequent tests.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A three-component micro-vibration sensor fixing and orientation device, characterized in that, Includes orientation detection assembly cover, placement chamber sleeve, and sensor placement chamber; The sensor arrangement chamber is installed inside the arrangement chamber sleeve, and the sensor arrangement chamber has a groove for placing the three-component micro-vibration sensor and the tilt sensor. The orientation detection assembly cover is installed at one end of the sensor arrangement chamber. It includes a compass cover and a coordinate cover. The coordinate cover is installed at the end of the sensor arrangement chamber. One side of the compass cover is movably connected to the other side of the coordinate cover, so that the compass cover is stacked on top of the coordinate cover when not in use, and is at the same horizontal plane as the coordinate cover when in use. The compass cover contains a compass for determining orientation. The compass cover is equipped with a compass level for determining the levelness of the compass cover when the compass is in use. The coordinate cover is equipped with coordinates for determining the orientation and attitude of the three-component microseismic sensor in conjunction with the compass. Specifically, the sensor arrangement chamber has a groove structure with three mutually perpendicular sides, so that the three-component microseismic sensor can maintain the three components being mutually perpendicular after being fixed in the groove, and the directions of the three components are consistent with the calibration directions of the three-axis coordinates on the orientation detection assembly cover. The tilt sensor installed in the sensor arrangement chamber reads the tilt data of the current sensor arrangement chamber. At the same time, the orientation detection assembly cover reads the orientation data of the compass. The data is combined with the tilt data to obtain the orientation and attitude of the three-component microseismic sensor. The coordinate system consists of the X-axis, Y-axis, and Z-axis, with each axis oriented in the same direction as the three detection components of the three-component micro-vibration sensor. The 0° mark on the compass is oriented in the same direction as the X-axis. The coordinate cover is equipped with a level gauge to measure its levelness during use.

2. The three-component microseismic sensor fixing and orientation device according to claim 1, characterized in that, The sensor arrangement compartment is a cylinder with a groove on the side that extends to one end face; the groove is a right-angled fan shape in the radial section of the cylinder and a rectangle in the axial section of the cylinder.

3. The three-component microseismic sensor fixing and orientation device according to claim 1, characterized in that, The arrangement chamber sleeve is a rectangular shell with a cylindrical groove inside.

4. The three-component microseismic sensor fixing and orientation device according to claim 1, characterized in that, The compass level includes a circular bubble box and a compass balance ball. The compass balance ball is placed inside the circular bubble box. The levelness of the compass cover is determined by whether the compass balance ball is at the center of the circular bubble box. The cover level includes a rectangular bubble box and a cover balance ball. The cover balance ball is placed inside the rectangular bubble box. The levelness of the coordinate cover is determined by whether the rectangular balance ball is at the center of the rectangular bubble box.

5. The three-component microseismic sensor fixing and orientation device according to claim 1, characterized in that, The coordinate cover is connected to the compass cover via a hinge.

6. The three-component microseismic sensor fixing and orientation device according to claim 1, characterized in that, The sleeve of the arrangement chamber is equipped with a built-in coil. The three-component micro-vibration sensor and the tilt sensor are respectively connected to the external data acquisition terminal through the built-in coil for transmitting the acquired data.

7. A method for operating the three-component microseismic sensor fixing and orientation device according to any one of claims 1 to 6, characterized in that, The specific steps are as follows: Step 1: Select the required monitoring location and drill a hole until the bedrock is reached. Then, fix the housing sleeve in the hole by pouring concrete. Step 2: Fix the three-component micro-vibration sensor and tilt sensor in the groove of the sensor arrangement chamber, ensuring a seamless fit with the groove wall. The three-component micro-vibration sensor and tilt sensor are connected to the data acquisition terminal through built-in coils. Then, install the orientation detection combination cover at one end of the sensor arrangement chamber and place the sensor arrangement chamber inside the arrangement chamber sleeve. Step 3: Flip the compass cover to open the azimuth detection assembly cover. First, adjust the coordinate cover to keep it level using the level indicator on the cover. Then, adjust the compass cover to be on the same horizontal plane as the coordinate cover using the level indicator on the compass. At this time, the orientation of the 0° mark on the compass is the same as the orientation of the X-axis. Read the degree by which the compass north needle deviates from the 0° mark and combine it with the tilt angle value of the tilt sensor. This is the azimuth attitude of the three-component microseismic sensor. Microseismic monitoring will then begin based on the current azimuth attitude. Step 4: After the microseismic monitoring test is completed, remove the sensor placement chamber and azimuth detection combination cover from the placement chamber sleeve for reuse in subsequent tests.

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