A distributed seismic wave field monitoring device and installation method

Abstract

This invention relates to the field of seismic wavefield monitoring technology, and more particularly to a distributed seismic wavefield monitoring device and its installation method. The invention provides a distributed seismic wavefield monitoring device in which a seismic sensor is installed at the bottom of the cylindrical body, and a positioning pin is connected to the bottom of the seismic sensor. These components constitute the basic monitoring device. During installation, the positioning pin automatically penetrates the ground to assist in positioning and determine the initial position, reducing human error. Each monitoring device is connected by a pull rope, and a clever transmission structure consisting of a lead screw, lifting frame, and tilting rod allows operators to easily and flexibly install the monitoring devices precisely to a predetermined depth on the ground, based on pre-planned instructions. Whether in plains or mountainous areas, a monitoring network can be efficiently constructed without complex operations, providing comprehensive coverage of the area. Compared to traditional technologies, this significantly improves installation efficiency, reduces human error, comprehensively covers various areas, effectively ensures comprehensive and accurate monitoring, and meets diverse needs.

Description

Technical Field

[0001] This invention relates to the field of seismic wavefield monitoring technology, and in particular to a distributed seismic wavefield monitoring device and its installation method. Background Technology

[0002] In the field of earthquake monitoring, accurate and comprehensive monitoring of seismic wave fields is of great significance for earthquake prediction and disaster assessment. Distributed seismic monitoring systems, due to their ability to be flexibly deployed over large areas and comprehensively acquire seismic wave information, have become a key focus of research and application. However, existing technologies and related devices have many problems in practical applications.

[0003] The installation and deployment of existing distributed seismic monitoring systems are extremely complex. When building a large-area monitoring network, traditional methods require staff to accurately measure each monitoring point and manually adjust and fix the equipment. When operating in plains or mountainous areas, staff need to carry the equipment back and forth between monitoring points frequently. This process not only consumes a lot of manpower and time, but human operation is also prone to errors, resulting in unreasonable equipment layout, creating monitoring blind spots, and seriously affecting the comprehensive acquisition of seismic wavefield information.

[0004] In terms of stability, existing technologies also have significant shortcomings. In distributed monitoring networks, the stability of connections between devices is poor. Traditional connection methods, such as simple cable connections or clip-on connections, are easily loosened by minor vibrations or soil displacement, severely affecting the continuity and accuracy of data transmission. Furthermore, the methods for fixing individual devices underground are limited, often relying on simple burial or a few fixing components. In areas with soft soil, buried devices are prone to displacement, leading to data deviations and failing to meet the stability requirements under different geological conditions. Summary of the Invention

[0005] To overcome the aforementioned shortcomings, this invention provides a distributed seismic wavefield monitoring device and installation method. The monitoring device is stable and flexible in installation, which can significantly improve installation efficiency and reduce human error compared with traditional technologies. The connection between adjacent monitoring devices is stable, which can effectively resist external interference, solve the stability problem of existing technologies, and effectively prevent rainwater from penetrating into the seismic sensor, extend the service life of the device, reduce maintenance costs, and ensure long-term stable monitoring.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a distributed seismic wavefield monitoring device, comprising a cylinder, a seismic sensor, and a positioning pin. The seismic sensor is installed at the bottom of the cylinder, and the positioning pin is connected to the bottom of the seismic sensor. These components constitute a basic monitoring device. The device also includes a rocker arm, a tension spring, a guide frame, a lifting frame, a lead screw, and a traction assembly. Multiple rocker arms are provided and rotatably connected to the cylinder at circumferential intervals. The inner end of each rocker arm is located inside the cylinder, and its outer end is located outside the cylinder and at an angle. A tension spring connects the inner end of each rocker arm to the top of the cylinder. The top of the seismic sensor is connected to the guide frame, and the lifting frame is slidably connected to the guide frame. A lead screw is rotatably connected to the middle of the top of the seismic sensor, and the lead screw is threadedly connected to the lifting frame. The guide frame, lifting frame, and lead screw are all located inside the cylinder, and the lifting frame is in contact with the inner end of the rocker arm. The traction assembly is located at the top of the cylinder and is rotatably connected to the lead screw.

[0007] Furthermore, the traction assembly includes a housing, a pull rope, a rotating shaft, a spiral spring, and a collar. The housing is fixedly connected to the top of the cylinder and has inner and outer chambers. The top of the lead screw is connected to the rotating shaft, the upper end of which passes through the cylinder and is rotatably connected to the housing. The rotating shaft is located in the inner chamber of the housing, and a spiral spring is sleeved on the upper end of the rotating shaft. The spiral spring is located in the inner chamber of the housing, with its inner end connected to the rotating shaft and its outer end connected to the inside of the housing. A pull rope is wound around the outer chamber inside the housing. One end of the pull rope is connected to the rotating shaft, and the other end of the pull rope passes through the housing and is connected to a collar. The collar is used to engage with the housing of the next monitoring device.

[0008] Furthermore, the screw pitch on the lead screw is designed with a dense pattern.

[0009] Furthermore, the seismic sensor adopts a highly integrated design, tightly integrating the data acquisition unit, communication module, central processing unit, and power supply module into a compact housing to form a complete seismic monitoring terminal.

[0010] Furthermore, the monitoring device also includes a sealing cylinder, a piston block, a delivery pipe, and an airbag. The sealing cylinder is connected to the top of the cylinder body, and the piston block is slidably connected inside the sealing cylinder. Multiple delivery pipes are connected through the upper outer side of the sealing cylinder, and the inner ends of the delivery pipes are interconnected with the inside of the sealing cylinder. An airbag is connected to the upper outer side of the cylinder body, and the outer ends of the delivery pipes are connected to the airbag and interconnected with its interior. The lifting frame is slidably engaged with the sealing cylinder, and the lifting frame is fixedly connected to the piston block.

[0011] Furthermore, it also includes a lifting ring, a return spring, a locking rod, and a connecting plate. The lifting ring is slidably connected to the top of the cylinder. The lifting ring slides and cooperates with the sealing cylinder independently. The lifting ring adopts a combination structure of inner and outer rings. Its outer ring is located on the outside of the cylinder. Two symmetrically distributed return springs are connected between the inner ring of the lifting ring and the top of the cylinder. Two locking rods are connected to the inner ring of the lifting ring. A connecting plate is connected to the upper end of the rotating shaft. Multiple slots are evenly spaced along the circumference of the connecting plate. The locking rods engage with the slots.

[0012] Furthermore, it also includes a sealing ring, which is connected to the outer side of the cylinder above the lifting ring.

[0013] Furthermore, it also includes a level, which is mounted on the top of the casing.

[0014] To achieve the above objectives, the present invention also provides an installation method for a distributed seismic wavefield monitoring device, which specifically includes the following steps:

[0015] S1: Conduct a comprehensive survey of the monitoring area, taking into account factors such as geological structure, population distribution, and historical seismic activity characteristics, to formulate a scientific and reasonable deployment plan and clarify the installation location and spacing requirements of each monitoring device;

[0016] S2: Make holes in the ground at predetermined locations that match the shape of the cylinder, install the monitoring device into the holes, insert the positioning pin into the ground, and use the auxiliary device for positioning. As the cylinder goes deeper, the inner wall of the hole squeezes the rocker arm to rotate inward, and the tension spring is stretched. The elasticity of the spring makes the rocker arm fit tightly against the inner wall of the hole, thus achieving the initial fixation of the monitoring device.

[0017] S3: After installing one monitoring device, connect it to the next monitoring device through the traction component, move the monitoring device to the predetermined spacing position, and drive the lifting frame to move upward by controlling the screw rotation through the traction component. This pushes the rocker arm to press more tightly against the inner wall of the hole, enhancing the fixing effect. In this way, the distributed layout installation of multiple monitoring devices is completed, and a monitoring network is constructed.

[0018] S4: After the monitoring device is put into use, it senses seismic waves in real time through seismic sensors, transmits the analog signals to the data acquisition unit, and after processing, transmits them to the central processing unit for analysis. The relevant data is then transmitted to the terminal for subsequent research.

[0019] Furthermore, the distributed seismic wave field monitoring device also includes a sealing cylinder, a piston block, a delivery pipe, an airbag, a lifting ring, a return spring, a locking rod, and a connecting plate;

[0020] In step S2, during the process of placing the monitoring device into the hole, the lifting ring moves upward due to friction with the inner wall of the hole, which drives the locking rod to move upward. The reset spring is compressed, and the locking rod disengages from the locking groove, so that the rotating shaft is in a rotatable state.

[0021] In step S3, after installing one monitoring device, pull out the pull rope of the traction component and put the collar on the outer shell of the next monitoring device. Move this device to the predetermined distance position. Pulling the rope drives the rotating shaft to rotate, and at the same time the lead screw rotates, which drives the lifting frame to move upward. This pushes the rocker arm to press more tightly against the inner wall of the hole, enhancing the fixing effect. As the lifting frame moves upward, it drives the piston block to move upward in the sealing cylinder. Air in the sealing cylinder is filled into the air bladder through the delivery pipe. The air bladder expands and presses tightly against the inner wall of the hole, completing the seal between the outer wall of the cylinder and the hole.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) During installation, the positioning pin automatically penetrates the ground to assist in positioning and determine the initial position, reducing human error. The various monitoring devices are connected by a pull rope. Through the ingenious transmission structure composed of a lead screw, lifting frame and rocker arm, the staff can easily and flexibly install the monitoring devices to the predetermined depth on the ground according to the prior plan. Whether in plains or mountains, no complicated operation is required to efficiently build a monitoring network and fully cover the area. Compared with traditional technology, it greatly improves installation efficiency, reduces human error, fully covers various areas, and effectively ensures comprehensive and accurate monitoring to meet diverse needs.

[0024] (2) The traction component of the present invention utilizes a small-pitch screw design, which transmits human power through a pull rope and a rotating shaft, driving the lifting frame to push the rocker arm to press tightly against the inner wall of the hole, thereby enhancing the firmness between the cylinder and the hole; after installation, the pull rope is tensioned, which not only connects the device but also stabilizes the network, ensuring the stability of the device, effectively resisting external interference, and solving the stability problem of the prior art.

[0025] (3) This device is equipped with a sealing cylinder, piston block, delivery pipe and air bag. During installation, the lifting frame moves the piston block upward, and the air in the sealing cylinder is filled into the air bag through the delivery pipe to make it expand and tightly contact the hole, effectively preventing rainwater from penetrating into the seismic sensor, protecting the device in harsh environments such as the rainy season, significantly extending the service life of the device, reducing maintenance costs, and ensuring long-term stable monitoring. Attached Figure Description

[0026] Figure 1 This is a state diagram of the invention installed on the ground to be monitored.

[0027] Figure 2 This is a schematic diagram of the two monitoring devices of the present invention being connected to each other.

[0028] Figure 3This is a three-dimensional structural diagram of the positioning pin, rocker arm, and housing components of the present invention.

[0029] Figure 4 This is a three-dimensional structural diagram of the guide frame, lifting frame, and lead screw components of the present invention.

[0030] Figure 5 This is a three-dimensional structural diagram of the components of the present invention, including the cylinder, seismic sensor, and positioning pin.

[0031] Figure 6 This is a three-dimensional structural diagram of the outer shell, pull cord, and rotating shaft of the present invention.

[0032] Figure 7 This is a three-dimensional structural diagram of the lifting frame, lead screw, and rotating shaft of the present invention.

[0033] Figure 8 This is a three-dimensional structural diagram of the spiral spring, outer shell, and cylinder of the present invention.

[0034] Figure 9 This is a three-dimensional structural diagram of the sealing cylinder, cylinder body, and rotating shaft components of the present invention.

[0035] Figure 10 This is a three-dimensional structural diagram of the piston block, delivery pipe, and airbag components of the present invention.

[0036] Figure 11 This is a three-dimensional structural diagram of the sealing ring, airbag, and delivery pipe components of the present invention.

[0037] Figure 12 This is a three-dimensional structural diagram of the lifting ring, sealing ring, and rotating shaft components of the present invention.

[0038] Figure 13 This is a three-dimensional structural diagram of the components of the present invention, including the reset spring, the locking rod, and the connecting disc.

[0039] Explanation of reference numerals in the attached drawings: 1_cylinder body, 101_seismic sensor, 102_positioning pin, 103_rocker, 104_tension spring, 105_guide frame, 106_lifting frame, 107_lead screw, 201_outer shell, 202_pull rope, 203_rotating shaft, 204_volute spring, 205_collar, 301_sealing cylinder, 302_piston block, 303_conveying pipe, 304_airbag, 401_lifting ring, 402_reset spring, 403_clamp, 404_connecting disc, 405_groove, 5_sealing ring, 6_level. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1: A distributed seismic wavefield monitoring device, such as Figures 1-8 As shown, the device includes a cylinder 1, a seismic sensor 101, a positioning pin 102, a rocker arm 103, a tension spring 104, a guide frame 105, a lifting frame 106, a lead screw 107, and a traction assembly. The seismic sensor 101 is installed at the bottom of the cylinder 1, and the positioning pin 102 is connected to the bottom of the seismic sensor 101. This pin is used to drive the sensor into the ground during installation, enhancing the stability of the connection between the device and the ground, and also helping the seismic sensor 101 better receive seismic wave signals from underground. These components constitute a basic monitoring device. The monitoring device can be flexibly arranged in the monitoring area according to the size of the monitoring area and the terrain characteristics, forming a distributed monitoring network. This allows for more comprehensive monitoring of changes in the seismic wave field, improving the accuracy and reliability of the monitoring. Multiple rocker arms 103 are provided, rotating circumferentially and connected to the cylinder 1. Multiple corresponding grooves are provided on the cylinder 1. The inner end of each rocker arm 103 is located inside the cylinder 1, and its outer end can slide out of the cylinder 1 through the groove. Furthermore, each rocker arm 103 is angled upwards. A tension spring 104 connects the inner end of each rocker arm 103 to the top of the inner cylinder 1. The tension spring 104 provides a stabilizing force to the rocker arm 103, preventing it from rotating arbitrarily when not installed. A guide frame 105 is connected to the top of the seismic sensor 101. A lifting frame 106 is slidably connected to the guide frame 105. A lead screw 107 is rotatably connected to the middle of the top of the seismic sensor 101. The lead screw 107 is threadedly connected to the lifting frame 106. The frame 105, the lifting frame 106, and the lead screw 107 are all located inside the cylinder 1. The lifting frame 106 is in contact with the inner end of the rocker arm 103. The lead screw 107 has a dense pitch design. When the lead screw 107 rotates, the lifting frame 106 moves a very small distance in the axial direction of the lead screw 107 for each rotation. This makes the circumferential force required to drive the lead screw 107 to rotate relatively small. The traction component is located at the top of the cylinder 1 and is rotatably connected to the lead screw 107.

[0042] like Figures 1-4 and Figures 6-8As shown, the traction assembly includes a housing 201, a pull rope 202, a rotating shaft 203, a spiral spring 204, and a collar 205. The housing 201 is fixedly connected to the top of the cylinder 1 and has inner and outer chambers. The rotating shaft 203 is welded to the top of the lead screw 107. The upper end of the rotating shaft 203 passes through the cylinder 1 and is rotatably connected to the housing 201. The rotating shaft 203 is located in the inner chamber of the housing 201. A spiral spring 204 is sleeved on the upper end of the rotating shaft 203. 204 is located in the inner cavity of the outer shell 201. Its inner end is connected to the rotating shaft 203, and its outer end is connected to the inside of the outer shell 201. A pull rope 202 is wound around the outer cavity inside the outer shell 201. One end of the pull rope 202 is connected to the rotating shaft 203, and the other end of the pull rope 202 passes through the outer shell 201 and is connected to a collar 205. The collar 205 is used to fit with the outer shell 201 of the next monitoring device, thereby realizing the connection of two monitoring devices and facilitating distributed installation.

[0043] The seismic sensor 101 adopts a highly integrated design, tightly integrating the data acquisition unit, communication module, central processing unit, and power supply module into a compact housing to form a complete seismic monitoring terminal. The data acquisition unit is directly connected to the sensitive element of the seismic sensor 101 through a high-precision analog front-end circuit, enabling it to acquire the weak electrical signals output by the seismic sensor 101 in real time and convert them into digital signals for subsequent processing. The communication module is integrated on one side of the seismic sensor 101 and connected to the central processing unit via an internal bus. The central processing unit, the core component of the seismic sensor 101, is located on the main board inside the seismic sensor 101 and has high-speed interfaces connecting to the data acquisition unit, communication module, and power supply module. The power supply module is located at the bottom of the seismic sensor 101. The housing of the seismic sensor 101 is made of high-strength aluminum alloy and precision-machined, possessing excellent resistance to pressure, shock, and corrosion.

[0044] First, based on factors such as the geological structure, population distribution, and seismic activity characteristics of the monitoring area, a reasonable sensor deployment plan is formulated. In formulating the plan, Geographic Information System (GIS) technology is used to conduct a detailed analysis of the geological structure, combined with heat maps of population distribution and data such as the epicenter distribution, magnitude, and frequency of historical earthquakes. Using professional earthquake monitoring planning software, the theoretical installation location of each monitoring device is precisely planned to ensure that the monitoring network can comprehensively and reasonably cover the monitoring area, minimizing monitoring blind spots. Then, during the ground construction phase, based on the precise external dimensions of cylinder 1, professional drilling equipment is used to pre-drill holes that closely fit the shape of cylinder 1. The depth of these holes needs to be determined according to the predetermined plan and actual monitoring requirements to ensure that when the monitoring devices are installed at a certain depth on the ground, they can effectively receive seismic wave signals transmitted from underground. The monitoring devices are then installed into the holes... During the hole-making process, the positioning pin 102 connected to the bottom of the device can be easily inserted into the soil with its sharp end. As the cylinder 1 is gradually pushed into the hole, the inner wall of the hole comes into contact with the outer end of the rocker arm 103 and generates a squeezing force. The tension spring 104 will be stretched. During the stretching process, the tension spring 104 stores elastic potential energy. This elastic force acts on the rocker arm 103, causing it to have a tendency to rotate outward, thereby making the rocker arm 103 tightly abut against the inner wall of the hole. This achieves the initial fixation of the monitoring device in the hole and provides a relatively stable foundation for subsequent installation operations. After the initial installation of one monitoring device is completed, the subsequent steps of distributed installation are carried out. Pull the collar 205 to pull out the pull rope 202. The movement of the collar 205 causes the pull rope 202 to be pulled out from the outer shell 201. The collar 205 at the end of the pull rope 202 is accurately put onto the outer shell 201 of the next monitoring device. When moving the monitoring device to the predetermined interval position, in order to achieve precise adjustment of the monitoring point, a graduated measurement baseline is pre-set on the ground according to the deployment plan. The pulling length of the pull rope 202 is precisely controlled. The pulling of the pull rope 202 drives the rotating shaft 203 to rotate, causing the spiral spring 204 to deform and store elastic potential energy. The rotation of the rotating shaft 203 drives the lead screw 107 to rotate, which in turn drives the lifting frame 106 to move upward along the guide frame 105. Because the lead screw 107 has a small pitch, it means that when the lead screw 107 rotates, each rotation... In this configuration, the lifting frame 106 moves a very small distance axially along the lead screw 107. During the rotation of the rotating shaft 203 caused by the pull rope 202, a certain lever arm exists between the pull rope 202 and the rotating shaft 203. A small pulling force applied to the end of the pull rope 202, transmitted through the rotating shaft 203, generates a relatively large torque at the lead screw 107. This torque drives the lead screw 107 to rotate. When the lifting frame 106 contacts the inner end of the rocker arm 103, the continuing upward movement of the lifting frame 106 applies an upward thrust to the rocker arm 103. This thrust generates a component force that causes the rocker arm 103 to rotate outwards around its rotational connection point.Although the rocker arm 103 needs to overcome considerable resistance to contact the inner wall of the hole, the small-pitch design of the lead screw 107 transforms the manual pulling of the rope 202 into a circumferential force from the rotation of the lead screw 107. Through the accumulation of multiple rotations of the lead screw 107, this force is successfully converted into an upward linear thrust on the lifting frame 106. During this process, the displacement of the lifting frame 106 generated by each small rotation of the lead screw 107 continuously accumulates, eventually forming a significant force sufficient to push the rocker arm 103 to overcome resistance and tightly contact the inner wall of the hole. This further enhances the stability between the cylinder 1 and the hole. Because the transmission ratio between the rope 202, the rotating shaft 203, and the lead screw 107 is fixed, the number of rotations of the lead screw 107 can be accurately determined through simple calculations, thereby precisely adjusting the rising height of the lifting frame 106. Changes in the position of the lifting frame 106 also affect the contact position between the rocker arm 103 and the inner wall of the hole, thus enabling fine-tuning of the monitoring device's position within the hole, precisely controlling the monitoring point position, and meeting the requirements for precise adjustment of the monitoring point.

[0045] Following the installation method described above, multiple monitoring devices were sequentially installed in a distributed layout, constructing a complete distributed seismic wavefield monitoring network. During network construction, for different terrains, such as mountainous areas, the installation angles of the monitoring devices were adjusted in real time using measuring equipment such as total stations, based on the mountain's contours and valley distribution. This ensured that the seismic sensors 101 of each device could optimally receive seismic wave signals, optimizing the device layout and eliminating potential monitoring blind spots caused by complex terrain. After the distributed layout was completed, the monitoring devices were put into operation. When the seismic sensor 101 senses ground motion caused by seismic waves, it transmits analog signals to the data acquisition unit. The data acquisition unit samples and quantizes the analog signals according to the set sampling frequency and resolution, converting them into digital signals and performing preliminary filtering and amplification. The processed data is then transmitted to the central processing unit via the communication module according to a predetermined communication protocol. Upon receiving the data, the central processing unit first performs quality checks and preprocessing, then analyzes the data using seismic signal processing software, extracting characteristic parameters of the seismic waves. By jointly analyzing the data collected by multiple seismic sensors 101, seismic location algorithms can be used to determine the location of earthquake events. Simultaneously, based on parameters such as the propagation velocity and amplitude of seismic waves, the magnitude and energy release of the earthquake can be estimated. Finally, the data is transmitted to the terminal for subsequent analysis.

[0046] When it is necessary to remove the monitoring devices, first disconnect the connections between the monitoring devices by removing the collar 205 from the corresponding housing 201. The spiral spring 204 will then rebound and reset, causing the shaft 203 to rotate in the opposite direction to wind up the pull rope 202 inside the housing 201. The shaft 203 then reverses, causing the lead screw 107 to reverse, moving the lifting frame 106 downwards and resetting it. This releases the lifting frame from contact with the inner end of the rocker arm 103. Next, the operator can use tools to enlarge the hole in the ground, eliminating the pressure and friction from the inner wall of the hole on the monitoring devices, allowing them to be easily removed from the hole, thus completing the disassembly.

[0047] Example 2: Based on Example 1, such as Figures 9-11 As shown, it also includes a sealing cylinder 301, a piston block 302, a conveying pipe 303, and an airbag 304. The sealing cylinder 301 is connected to the top of the inner body 1. The piston block 302 is slidably connected inside the sealing cylinder 301. Multiple conveying pipes 303 are connected through the outer side of the upper end of the sealing cylinder 301. The inner end of the conveying pipe 303 communicates with the inside of the sealing cylinder 301. The airbag 304 is connected to the outer side of the upper part of the cylinder 1. The outer end of the conveying pipe 303 is connected to the airbag 304 and communicates with the inside. The lifting frame 106 is slidably engaged with the sealing cylinder 301, and the lifting frame 106 is fixedly connected to the piston block 302 to ensure that the piston block 302 can move synchronously when the lifting frame 106 moves.

[0048] After this device is installed inside the ground hole, when other monitoring devices are installed in a distributed manner, the pulling of the rope 202 drives the rotating shaft 203 and the lead screw 107 to rotate. The lead screw 107 drives the lifting frame 106 to move upward, which pushes the piston block 302 upward inside the sealing cylinder 301. The upward movement of the piston block 302 causes the air inside the sealing cylinder 301 to be compressed upward. The air enters the airbag 304 through the delivery pipe 303. As the gas is filled, the airbag 304 gradually inflates until it is tightly pressed against the hole in the ground, thereby ensuring the sealing between the outer wall of the cylinder 1 and the ground hole. In situations where there is a risk of rainwater seepage, such as during the rainy season, it can effectively prevent rainwater from seeping into the seismic sensor 101 through the holes, significantly improving the safety of the seismic sensor 101 during use. When it is necessary to remove the device, the pull rope 202 resets, causing the rotating shaft 203 and the lead screw 107 to reverse. The lifting frame 106 then drives the piston block 302 to move downward. During the downward movement of the piston block 302, the air in the airbag 304 is drawn back into the sealing cylinder 301 through the delivery pipe 303. As the gas is drawn out, the airbag 304 gradually contracts, making it easier to remove the device from the hole later.

[0049] like Figures 12-13As shown, it also includes a lifting ring 401, a return spring 402, a locking rod 403, and a connecting plate 404. The lifting ring 401 is slidably connected to the top of the inner cylinder 1. The lifting ring 401 is slidably engaged with the sealing cylinder 301 and is independent of each other. The lifting ring 401 adopts a combination structure of inner ring and outer ring. Its outer ring part is located outside the cylinder 1. Two symmetrically distributed return springs 402 are connected between the inner ring of the lifting ring 401 and the top of the inner cylinder 1. Two locking rods 403 are connected to the inner ring of the lifting ring 401. The upper end of the rotating shaft 203 is connected to the connecting plate 404. Multiple slots 405 are evenly spaced along the circumferential direction on the connecting plate 404. The locking rods 403 are engaged with the slots 405 to fix the rotating shaft 203 and prevent it from rotating easily.

[0050] In the initial state, the locking rod 403 tightly engages with the slot 405, effectively preventing the rotating shaft 203 from rotating and thus avoiding the pull rope 202 from being pulled arbitrarily. When the monitoring device is installed into a pre-drilled hole in the ground, the outer ring of the lifting ring 401 contacts the inner wall of the hole. During the process of pushing the device into the hole, the lifting ring 401 moves upward under the action of friction, causing the locking rod 403 to move upward synchronously. During this process, the return spring 402 is compressed. After the locking rod 403 moves upward, it disengages from the slot 405, so that after the device is installed, the rotating shaft 203 is in a relaxed, rotatable state, allowing for normal subsequent operations. After the device is removed from the hole, the lifting ring 401 is no longer subject to resistance from the inner wall of the hole. The return spring 402 rebounds and resets due to elastic force, causing the lifting ring 401 and the locking rod 403 to move downward to the initial position. At this time, the locking rod 403 re-engages with the slot 405, restoring the locked state of the rotating shaft 203.

[0051] like Figures 11-12 As shown, it also includes a sealing ring 5. The sealing ring 5 is connected to the outer side of the cylinder 1 above the lifting ring 401. When the cylinder 1 is installed into the underground hole, the sealing ring 5 can significantly improve the tightness between the outer wall of the cylinder 1 and the ground hole. Furthermore, when the lifting ring 401 moves upward during installation, it will exert a squeezing effect on the sealing ring 5, causing the sealing ring 5 to deform, further enhancing its tightness with the inner wall of the hole.

[0052] like Figure 2 As shown, it also includes a level 6. The level 6 is bolted to the top of the housing 201. During the installation of the monitoring device on the ground, the operator can visually determine whether the device is in a horizontal position by checking the level 6, thereby improving the accuracy of the device installation, ensuring that the seismic sensor 101 can accurately receive seismic wave signals, and improving the reliability of the monitoring data.

[0053] Example 3 provides an installation method for a distributed seismic wavefield monitoring device, using the distributed seismic wavefield monitoring device from Example 2 for monitoring, specifically including the following steps:

[0054] S1: Conduct a comprehensive survey of the monitoring area, taking into account factors such as geological structure, population distribution, and historical seismic activity characteristics. Use professional knowledge and scientific methods to develop a scientific and reasonable deployment plan, and clarify the installation location and spacing requirements of each monitoring device.

[0055] S2: A hole matching the shape of the cylinder 1 is made in the ground at a predetermined position. The monitoring device is installed in the hole. At this time, the positioning needle 102 automatically penetrates the ground to assist in positioning the device. As the cylinder 1 goes deeper, the inner wall of the hole squeezes the rocker arm 103 to rotate inward. The tension spring 104 is stretched, and its elasticity is used to make the rocker arm 103 tightly abut against the inner wall of the hole, thus achieving the initial fixation of the device.

[0056] S3: During the process of inserting the device into the hole, the lifting ring 401 contacts the inner wall of the hole and moves upward due to friction, which drives the locking rod 403 to move upward. The return spring 402 is compressed, and the locking rod 403 disengages from the locking groove 405 on the connecting plate 404, so that the rotating shaft 203 is in a rotatable state.

[0057] S4: After installing one device, pull the collar 205 to extend the pull rope 202 and place the collar 205 onto the housing 201 of the next monitoring device. Move this device to the predetermined distance position. The pull rope 202 drives the rotating shaft 203 to rotate, the spiral spring 204 deforms, and the lead screw 107 rotates, which drives the lifting frame 106 to move upward, pushing the rocker arm 103 to further press tightly against the inner wall of the hole, enhancing the fixing effect. In this way, the distributed layout installation of multiple monitoring devices is completed, and a monitoring network is constructed.

[0058] S5: As the lifting frame 106 moves upward, it drives the piston block 302 to move upward in the sealing cylinder 301. The air in the sealing cylinder 301 is filled into the airbag 304 through the conveying pipe 303. The airbag 304 expands and tightly abuts against the inner wall of the hole, completing the seal between the outer wall of the cylinder 1 and the hole.

[0059] S6: After the device is put into use, the seismic sensor 101 senses seismic waves in real time, transmits the analog signal to the data acquisition unit, and after processing, transmits it to the central processing unit for analysis. The relevant data is then transmitted to the terminal for subsequent research.

[0060] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the invention without departing from the principles and spirit of the invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for illustrative purposes only and is not intended to limit the invention; rather, the scope of protection is defined by the content of the claims.

Claims

1. A distributed seismic wavefield monitoring device, comprising a cylinder (1), a seismic sensor (101), and a positioning pin (102), wherein the seismic sensor (101) is installed at the bottom of the cylinder (1), and the positioning pin (102) is connected to the bottom of the seismic sensor (101), these components constituting a monitoring device, characterized in that: It also includes a rocker arm (103), a tension spring (104), a guide frame (105), a lifting frame (106), a lead screw (107), and a traction assembly. Multiple rocker arms (103) are provided, rotatably connected to the cylinder (1) at circumferential intervals. The inner end of each rocker arm (103) is located inside the cylinder (1), and its outer end is located outside the cylinder (1) and at an angle. A tension spring (104) connects the inner end of each rocker arm (103) to the top of the cylinder (1). The top of the seismic sensor (101) is connected to... A guide frame (105) is slidably connected to a lifting frame (106). A lead screw (107) is rotatably connected to the top center of the seismic sensor (101). The lead screw (107) is threadedly connected to the lifting frame (106). The guide frame (105), the lifting frame (106), and the lead screw (107) are all located inside the cylinder (1). The lifting frame (106) is in contact with the inner end of the rocker arm (103). The traction component is set at the top of the cylinder (1) and is rotatably connected to the lead screw (107). The traction assembly includes a housing (201), a pull rope (202), a rotating shaft (203), a spiral spring (204), and a collar (205). The housing (201) is fixedly connected to the top of the cylinder (1). The housing (201) has inner and outer chambers. The top of the lead screw (107) is connected to the rotating shaft (203). The upper end of the rotating shaft (203) passes through the cylinder (1) and is rotatably connected to the housing (201). The rotating shaft (203) is located in the inner chamber of the housing (201). A spiral spring (204) is fitted at the end of the housing (201). The spiral spring (204) is located in the inner cavity of the housing (201). Its inner end is connected to the rotating shaft (203), and its outer end is connected to the inside of the housing (201). A pull rope (202) is wound around the outer cavity inside the housing (201). One end of the pull rope (202) is connected to the rotating shaft (203), and the other end of the pull rope (202) passes through the housing (201) and is connected to a collar (205). The collar (205) is used to fit with the housing (201) of the next monitoring device. The monitoring device also includes a sealing cylinder (301), a piston block (302), a delivery pipe (303), and an airbag (304). The sealing cylinder (301) is connected to the top of the cylinder (1). The piston block (302) is slidably connected inside the sealing cylinder (301). Multiple delivery pipes (303) are connected through the upper outer side of the sealing cylinder (301). The inner end of the delivery pipe (303) communicates with the inside of the sealing cylinder (301). The airbag (304) is connected to the upper outer side of the cylinder (1). The outer end of the delivery pipe (303) is connected to the airbag (304) and communicates with the inside. The lifting frame (106) is slidably engaged with the sealing cylinder (301), and the lifting frame (106) is fixedly connected with the piston block (302).

2. The distributed seismic wavefield monitoring device according to claim 1, characterized in that: The screw thread (107) has a dense pitch design.

3. A distributed seismic wavefield monitoring device according to claim 1 or 2, characterized in that: The earthquake sensor (101) adopts a highly integrated design, which tightly integrates the data acquisition unit, communication module, central processing unit and power supply module into a compact housing to form a complete earthquake monitoring terminal.

4. A distributed seismic wavefield monitoring device according to claim 2, characterized in that: It also includes a lifting ring (401), a return spring (402), a locking rod (403) and a connecting plate (404). The lifting ring (401) is slidably connected to the top of the inner cylinder (1). The lifting ring (401) and the sealing cylinder (301) are slidably engaged and independent of each other. The lifting ring (401) adopts a combination structure of inner ring and outer ring. Its outer ring part is located outside the cylinder (1). Two symmetrically distributed return springs (402) are connected between the inner ring of the lifting ring (401) and the top of the inner cylinder (1). Two locking rods (403) are connected to the inner ring of the lifting ring (401). The upper end of the rotating shaft (203) is connected to the connecting plate (404). Multiple slots (405) are evenly spaced along the circumferential direction on the connecting plate (404). The locking rods (403) are engaged with the slots (405).

5. A distributed seismic wavefield monitoring device according to claim 4, characterized in that: It also includes a sealing ring (5), which is connected to the outer side of the cylinder (1) above the lifting ring (401).

6. A distributed seismic wavefield monitoring device according to claim 4, characterized in that: It also includes a level (6), which is mounted on the top of the housing (201).

7. A method for installing a distributed seismic wavefield monitoring device according to any one of claims 1 to 6, characterized in that, Specifically, the steps include the following: S1: Conduct a comprehensive survey of the monitoring area, taking into account geological structure, population distribution, and historical seismic activity characteristics, to formulate a scientific and reasonable deployment plan and clarify the installation location and spacing requirements of each monitoring device; S2: Make holes in the ground at predetermined locations that match the shape of the cylinder, install the monitoring device into the holes, insert the positioning pin into the ground, and use the auxiliary device for positioning. As the cylinder goes deeper, the inner wall of the hole squeezes the rocker arm to rotate inward, and the tension spring is stretched. The elasticity of the spring makes the rocker arm fit tightly against the inner wall of the hole, thus achieving the initial fixation of the monitoring device. S3: After installing one monitoring device, connect it to the next monitoring device through the traction component, move the monitoring device to the predetermined spacing position, and drive the lifting frame to move upward by controlling the screw rotation through the traction component. This pushes the rocker arm to press more tightly against the inner wall of the hole, enhancing the fixing effect. In this way, the distributed layout installation of multiple monitoring devices is completed, and a monitoring network is constructed. S4: After the monitoring device is put into use, it senses seismic waves in real time through seismic sensors, transmits the analog signals to the data acquisition unit, and after processing, transmits them to the central processing unit for analysis. The relevant data is then transmitted to the terminal for subsequent research.

8. The installation method of a distributed seismic wavefield monitoring device according to claim 7, characterized in that: In step S2, during the process of placing the monitoring device into the hole, the lifting ring moves upward due to friction with the inner wall of the hole, which drives the locking rod to move upward. The reset spring is compressed, and the locking rod disengages from the locking groove, so that the rotating shaft is in a rotatable state. In step S3, after installing one monitoring device, pull out the pull rope of the traction component and put the collar on the outer shell of the next monitoring device. Move this device to the predetermined distance position. Pulling the rope drives the rotating shaft to rotate, and at the same time the lead screw rotates, which drives the lifting frame to move upward. This pushes the rocker arm to press more tightly against the inner wall of the hole, enhancing the fixing effect. As the lifting frame moves upward, it drives the piston block to move upward in the sealing cylinder. Air in the sealing cylinder is filled into the air bladder through the delivery pipe. The air bladder expands and presses tightly against the inner wall of the hole, completing the seal between the outer wall of the cylinder and the hole.

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