CN-119861398-B - Multi-module low-noise in-situ sensing system and sensing method for earthquake waves through multidirectional buffering

CN119861398BCN 119861398 BCN119861398 BCN 119861398BCN-119861398-B

Abstract

The invention relates to a seismic monitoring technology, in particular to a multi-module low-noise in-situ sensing system and a sensing method of a multi-directional buffered seismic wave, wherein the system integrates a main body rod structure, a vibration sensor, a swinging sensor and a resistivity sensor, and the vibration sensor is elastically and movably arranged at the top of the main body rod structure along the axial direction of the main body rod structure to form a longitudinal wave sensing module; the swinging sensor is slidably arranged at the upper part of the main body rod structure along the radial direction of the main body rod structure in a buffering way, the swinging sensor can rotate around the axis of the main body rod structure and form a transverse wave induction module, the resistivity sensor is detachably arranged at the upper part of the main body rod structure, and a first buffering structure is arranged between the resistivity sensor and the swinging sensor. And aiming at plumb vibration and horizontal vibration monitoring induction corresponding to longitudinal waves and transverse waves generated by earthquake waves in a three-dimensional space, energy absorption and noise elimination are carried out on low-magnitude environmental vibration by utilizing elastic energy storage.

Inventors

LIU LULU
WU LEILEI
LIU XIAOYAN
CAI GUOJUN
LIU ZHIMING
LIU SONGYU
TIAN HONGLIANG
CHEN QI
ZHU LIUWEN
DUAN HAIPENG

Assignees

中国矿业大学
安徽建筑大学
东南大学
安徽省交控建设管理有限公司
安徽省交通规划设计研究总院股份有限公司
中交第四航务工程勘察设计院有限公司
磐索地勘科技(广州)有限公司

Dates

Publication Date: 20260505
Application Date: 20250106

Claims (5)

1. A multi-module, low noise in situ induction system for seismic waves through multidirectional buffering, comprising: the main body rod structure is contacted with the ground and fixed; The vibration sensor (3) is elastically and movably arranged at the top of the main body rod structure along the axial direction of the main body rod structure to form a longitudinal wave induction module; the swinging sensor (4) is arranged at the upper part of the main body rod structure in a sliding manner along the radial direction of the main body rod structure in a buffering manner, and the swinging sensor (4) can rotate around the axis of the main body rod structure and forms a transverse wave induction module; A resistivity sensor (5), wherein the resistivity sensor (5) is detachably arranged at the upper part of the main body rod structure, and a first buffer structure is arranged between the resistivity sensor (5) and the swing sensor (4); the vibration sensor (3) is elastically and movably arranged at the top of the main body rod structure along the axial direction of the main body rod structure through a second buffer structure; The swing sensor (4) is arranged at the upper part of the main body rod structure along the radial direction of the main body rod structure in a buffering way through a third buffering structure; The first buffer structure, the second buffer structure and the third buffer structure are connected through a synchronous adjusting mechanism, and the synchronous adjusting mechanism is used for adjusting the elastic damping of the vibration sensor (3), the rotation damping of the swing sensor (4) and the sliding buffer damping of the swing sensor (4); The main body rod structure comprises a rod body (1) and a grounding terminal (2) detachably arranged at the lower end of the rod body (1) through threads, and a tip is formed at one end, deviating from the rod body (1), of the grounding terminal (2); The tip is provided with a metal conducting part, and the tip is connected with the resistivity sensor (5) by a wire penetrating through the center of the rod body (1); The resistivity sensor (5) is detachably arranged at the upper part of the main body rod structure through a flat support mechanism (7), and the flat support mechanism (7) comprises a bracket (701) and a clamp (702); One side of the rod body (1) is provided with a swinging support mechanism (6) along the radial direction of the rod body (1), and the swinging sensor (4) is arranged on the swinging support mechanism (6); The swing support mechanism (6) comprises a swing frame (601) with one end rotatably connected with the outer wall of the bracket (701) through a second middle rotating shaft (15), sliding grooves (603) are symmetrically formed in the swing frame (601) along the length direction of the swing frame, and sliding blocks (604) are slidably arranged in the sliding grooves (603); Each sliding block (604) is provided with a limiting rod (605), the third buffer structure comprises a plug bush (607) arranged at two ends of the swing sensor (4), the limiting rods (605) are in sliding sleeve connection with the plug bush (607), and a first spring (606) is further arranged between the limiting rods (605) and the plug bush (607); The first buffer structure comprises a buffer sleeve (8) with one end rotatably connected with the bracket (701) through a first middle rotating shaft (13), a connecting column (9) with one end rotatably connected with the swinging frame (601), and a second spring (12) which elastically connects the connecting column (9) with the buffer sleeve (8); The buffer sleeve (8) is in sliding sleeve joint with the connecting column (9), an end cap is formed at one end of the connecting column (9) extending into the buffer sleeve (8), the second spring (12) is in two sections, one section is sleeved on the outer wall of the connecting column (9) extending into the buffer sleeve (8), the other section is arranged in the buffer sleeve (8), and one ends of the two sections of the second springs (12) are respectively abutted to two sides of the end cap; The second buffer structure is fixed on an assembly shell (24) at the top of the rod body (1) through threaded connection, a jacking piece (17) which is adjustably arranged in the rod body (1) and a mounting cylinder frame (21) which is elastically arranged between the assembly shell (24) and the jacking piece (17); A caulking groove (2401) is formed in the inner wall of the assembly shell (24), the assembly shell (24) is in sliding fit with the nest (22), an outer protruding portion (2201) is formed on the outer wall of the nest (22), and the outer protruding portion (2201) is in sliding fit with the caulking groove (2401); a fourth spring (23) is arranged between the nest (22) and the assembly shell (24), the upper part of the installation cylinder frame (21) is in contact with the nest (22), a third spring (20) is arranged between the lower part of the installation cylinder frame (21) and the jacking piece (17), and the vibration sensor (3) is fixedly arranged at the top of the installation cylinder frame (21).
2. A multi-module, low noise in situ sensing system for seismic waves through multi-directional buffering as defined in claim 1, wherein one end of said bracket (701) is formed with a semi-circular arc portion, and said clip (702) is also semi-circular arc shaped; one end of the clamp (702) is rotationally connected with the bracket (701), the resistivity sensor (5) is fixedly arranged on the bracket (701), a screw sleeve (703) is arranged on one side of the bracket (701), and a fastening bolt (704) is connected on the screw sleeve (703) in a threaded manner; One end of the fastening bolt (704) forms a knob, the other end of the fastening bolt (704) is rotatably provided with a rotating sleeve, the rotating sleeve is hinged with one end of the connecting rod (705), and the other end of the connecting rod (705) is hinged with the clamp (702).
3. The multi-module low-noise in-situ sensing system of earthquake waves through multidirectional buffering according to claim 1, wherein a first double-ended screw (602) is rotatably arranged on the swinging frame (601), and the sliding block (604) is in threaded connection with the first double-ended screw (602); A straight groove (801) is formed in the buffer sleeve (8), and a second double-head screw (10) is rotatably arranged above the buffer sleeve (8); Two stop pieces (11) are symmetrically arranged in the buffer sleeve (8) in a sliding manner, one of the stop pieces (11) is in sliding fit with the connecting column (9), and the upper part of the stop piece (11) is in threaded connection with the second double-head screw (10) and slides through the straight groove (801); One end of one section of the second spring (12) is abutted with one of the stop pieces (11), and the other end is abutted with one side of the top cap; One end of the other section of the second spring (12) is abutted with the other stop piece (11), and the other end is abutted with the other side of the top cap.
4. A multi-module, low noise in situ sensing system for seismic waves through multidirectional buffering according to claim 3, wherein said synchronous adjustment mechanism comprises an adjustment screw (19) rotatably disposed on the exterior of said rod body (1), said adjustment screw (19) being threadably coupled to an internally threaded collar (18), said internally threaded collar (18) being fixedly coupled to said jack (17) through one of said arms; The lower part of the second middle rotating shaft (15) is provided with a spiral groove, the jacking piece (17) is fixedly connected with a ring sleeve (16) through another support arm, and a through groove for two support arms to pass through and slide is formed on the outer part of the rod body (1); The inner wall of the ring sleeve (16) is movably embedded with balls, the balls are in rolling engagement with the spiral grooves, and the second middle rotating shaft (15) is connected with the first middle rotating shaft (13) through a transmission piece (14); The second middle rotating shaft (15) is connected with the first double-ended screw rod (602) through a group of bevel gear sets, and the second middle rotating shaft (15) is connected with the second double-ended screw rod (10) through another group of bevel gear sets.
5. A method of in-situ multi-module, low noise sensing of seismic waves using the in-situ sensing system of claim 4, comprising the steps of: Firstly, calibrating measuring points, selecting a plurality of calibrating points in a monitored area according to geological features, assembling a rod body and a grounding terminal together, connecting the grounding terminal with a resistivity sensor together through a lead before assembling, and then connecting a vibration sensor, a swinging sensor and the resistivity sensor together on a signal host; Step two, erection and debugging, namely inserting the tip of the grounding terminal into the ground of the calibration measuring point, and powering up all the sensors after reaching a preset depth, wherein initial readings of the resistivity sensor are required to be recorded independently, and then zeroing is carried out on the vibration sensor and the swing sensor; determining an environmental noise coefficient, determining an environmental induced vibration average value, and adjusting the longitudinal vibration buffer intensity of the vibration sensor, the horizontal radial vibration buffer intensity of the swing sensor and the deflection buffer intensity of the swing sensor according to the induced vibration average value to compensate the induced vibration error; Step four, starting to monitor induction, and recording signal intensity of each frequency band on a signal host machine at regular time, wherein the signal intensity comprises longitudinal vibration intensity, horizontal swing intensity and resistivity change trend of a grounding terminal; and fifthly, summarizing and recording, collecting the data monitored in the fourth step, and performing curve fitting through a function equation to obtain the earthquake wave and crust pressure trend of the in-situ geology, and analyzing results to study and conclusion.

Description

Multi-module low-noise in-situ sensing system and sensing method for earthquake waves through multidirectional buffering Technical Field The invention relates to a seismic monitoring technology, in particular to a multi-module low-noise in-situ sensing system and a sensing method for seismic waves through multidirectional buffering. Background The seismic wave monitoring is to measure and analyze shock waves received by equipment and the like in the seismic process through various physical means, and the theoretical basis is basically concentrated on the propagation characteristics and fluctuation theory of the seismic waves, and data are collected through instrument equipment. The method can be particularly divided into seismic table network monitoring, seismic instrument monitoring and geomagnetic monitoring, wherein the most common seismic instrument monitoring is generally carried out by means of instruments such as a displacement meter, a vibration acceleration sensor and the like, the earth resistance observation of a symmetrical quadrupole device is used as the main earth resistance observation of the seismic table network, and the observation curve of the earth resistance observation is generally changed for a long time, changed for years, changed for days, stepped and the like. Geomagnetic monitoring is greatly affected by the environment because the principle of geomagnetic monitoring is to detect targets by utilizing the change of magnetic fields, but many substances can affect the magnetic fields, such as cables, metal components and the like, and external factors can interfere the accuracy and stability of the geomagnetic monitor, so that errors are increased. In academic and application, seismic waves are monitored from the fluctuation dimension based on the same principle, and measured data have certain tendencies on certain characteristics, are single in dimension and are obviously influenced by inducibility factors. Disclosure of Invention The invention aims to provide a multi-module low-noise in-situ induction system and an induction method for earthquake waves through multidirectional buffering so as to solve the problems in the background art. In order to achieve the purpose, the invention provides the following technical scheme that the multi-module low-noise in-situ induction system for the earthquake waves through multidirectional buffering comprises the following components: the main body rod structure is contacted with the ground and fixed; the vibration sensor is elastically and movably arranged at the top of the main body rod structure along the axial direction of the main body rod structure to form a longitudinal wave induction module; the swinging sensor is arranged at the upper part of the main body rod structure in a sliding manner along the radial direction of the main body rod structure in a buffering manner, can rotate around the axis of the main body rod structure and forms a transverse wave induction module; And the resistivity sensor is detachably arranged on the upper part of the main body rod structure, and a first buffer structure is arranged between the resistivity sensor and the swing sensor. The vibration sensor is elastically and movably arranged at the top of the main body rod structure along the axial direction of the main body rod structure through a second buffer structure; The swing sensor is arranged at the upper part of the main body rod structure in a buffering manner along the radial direction of the main body rod structure through a third buffering structure; The first buffer structure, the second buffer structure and the third buffer structure are connected through a synchronous adjusting mechanism, and the synchronous adjusting mechanism is used for adjusting elastic damping of the vibration sensor, rotation damping of the swing sensor and sliding buffer damping of the swing sensor. The main body rod structure comprises a rod body and a grounding terminal detachably arranged at the lower end of the rod body through threads, and a tip is formed at one end of the grounding terminal, which is far away from the rod body; The tip is a metal conductive part, and the tip is connected with the resistivity sensor through a wire passing through the center of the rod body. The resistivity sensor is detachably arranged at the upper part of the main body rod structure through a flat supporting mechanism, the flat supporting mechanism comprises a bracket and a clamp, a semicircular arc part is formed at one end of the bracket, and the clamp is also semicircular arc; one end of the clamp is rotationally connected with the bracket, the resistivity sensor is fixedly arranged on the bracket, a screw sleeve is arranged on one side of the bracket, and a fastening bolt is connected with the screw sleeve in a threaded manner; One end of the fastening bolt forms a knob, the other end of the fastening bolt is rotatably provided with a rotating sleeve, the rotating sleeve is h