172 results about "Seismometer" patented technology

The invention discloses an improved vibration compensation method suitable for an atom interference gravimeter. The method comprises the following steps: acquiring an atom interference signal and a vibration voltage signal output by a seismometer; initializing population parameters of the improved whale optimization algorithm, wherein the population parameters comprise a search space of a population size, a maximum number of iterations, a gain coefficient K and a delay coefficient tau; the method comprises the following steps: generating an initial whale population by adopting a method of combining Logistic chaotic mapping and Latin hypercube sampling LHS; calculating a phase shift caused by vibration noise and an atomic interference phase delta phi, and calculating the fitness of the whale individual by taking a root-mean-square error of compensated interference fringes as a target function; iteratively updating the population position through an improved whale optimization algorithm, outputting an optimal gain coefficient and an optimal delay coefficient, and obtaining an atomic interference signal after vibration compensation; according to the atomic interference gravimeter vibration compensation method, the global search capability, the local development precision and the stability of a vibration compensation algorithm are improved.

The invention relates to the field of mine geophysical exploration, and discloses a fully mechanized coal mining face geological abnormal area prediction method based on multi-source data, and the method comprises the steps: carrying out the detection of a fully mechanized coal mining face through a radio pit penetrating device and a slot wave seismograph, and obtaining a working face CT image and a slot wave energy attenuation coefficient image; analyzing a distribution rule of a plurality of abnormal prompt areas in the working face CT image, and delimiting a plurality of candidate abnormal areas to obtain an average abnormal amplitude value of each candidate abnormal area; analyzing a plurality of slot wave attenuation high value abnormal regions in the slot wave energy attenuation coefficient imaging, and carrying out overlapping region calculation on the plurality of candidate abnormal regions to obtain a plurality of overlapping regions; carrying out drilling point arrangement and drilling according to the plurality of overlapped areas, and measuring a plurality of drilling trajectories and drilling data corresponding to each drilling point through a trajectory instrument; and according to the plurality of drilling trajectories and the drilling data corresponding to each drilling point, abnormal region prediction data is generated, so that accurate prediction of the abnormal region is realized.

A curtain grouting reinforcement method for a tunnel group in a deep backfill area, and a reinforcement effect assessment method. The reinforcement method comprises the following steps: S1, calibrating hole positions according to design; S2, mounting a drilling rig; S3, drilling holes; S4, burying orifice pipes; S5, performing grouting; S6, sealing the holes; and S7, performing the next drilling and grouting cycle. Investment saving and safe and efficient construction are achieved, tunnel surrounding rocks can be fully reinforced, engineering geological conditions are improved, tunnel cavern stability is good, and ground surface settlement is small. The reinforcement effect assessment method comprises an inspection-hole drilling method, multi-wave and multi-component engineering seismograph inspection, assessment based on a high-definition drilling video, assessment based on soil and stone mixture parameter changes before and after grouting, etc., such that multi-angle comprehensive analysis can be achieved, grouting reinforcement effect assessment is more accurate, and a curtain grouting effect assessment system is further improved, thereby providing research ideas for inspecting and assessing the grouting effect in soil-rock mixed backfill areas.

The invention discloses a consistency detection method, device and system for large-scale seismic signal acquisition equipment, and relates to the technical field of geophysical exploration. The method is executed by computer equipment in a large-scale seismic signal acquisition equipment consistency detection system, and after background noise original data continuously and synchronously acquired by a plurality of seismic signal acquisition equipment is received, an accumulated power spectrum variance value of each acquisition equipment is obtained through preprocessing and multi-step calculation in sequence; and finally, according to the accumulated power spectrum variance value of each acquisition device and the distance from each acquisition device to the layout center position, determining the acquisition device with an abnormal relationship in the relationship dimension of the accumulated power spectrum variance and the acquisition time or the relative distance. The purpose of efficient, reliable and automatic consistency detection on large-scale seismic signal acquisition equipment can be achieved, and then the detection result can accurately reflect the performance state of a seismic instrument.

The application relates to the technical field of geological exploration, in particular to a wireless seismograph field burying equipment and a working method, which comprises a module square warehouse, a drum stock bin is arranged in the module square warehouse, a cloth drilling integrated machine and a mechanical hand are arranged on one side of the drum stock bin; the drum stock bin comprises a drum stock bin support, one end of the central shaft of the drum stock bin support is connected with a driven chain wheel, one rotary disc is arranged on the inner side of each of the two drum stock bin supports, the two rotary discs are hinged with the outer side wall of a code frame, and the wireless seismograph is placed in the code frame; the cloth drilling integrated machine comprises a moving platform back plate, a guide rail is arranged on the outer side of the moving platform back plate, a first hydraulic cylinder is arranged on the top of the guide rail, a hydraulic motor is arranged on the top of a fixed connecting plate, an oil cylinder is hinged on the outer side of the fixed connecting plate, the oil cylinder is hinged with a lower pressing semicylinder, a soil pressing outer sleeve and a limiting cylinder are arranged below the lower pressing semicylinder, and the side wall of the limiting cylinder is connected with a slide guide cylinder; the mechanical hand can clamp the wireless seismograph in the code frame and send the wireless seismograph into the cloth drilling integrated machine.

The invention discloses a mine geology advanced detection and real-time monitoring system based on a six-component seismograph, and relates to the technical field of coal mine underground seismic exploration. The six-component seismographs are respectively arranged on coal walls of a coal face and a driving face, synchronously collect original data at the same time, and upload the collected original data to the background server through the wireless repeater and the industrial looped network; the background server converts the original data into a geophysical inversion result; and the background server carries out real-time dynamic interpretation and artificial intelligence dynamic early warning on parameters of the stratum form, the geological structure and the rock mechanical property according to a geophysical inversion result, uploads early warning information to a control center and distributes the early warning information to personnel and mechanical equipment of a working face. Prediction and early warning of parameters such as stratum form, geologic structure and rock mechanical property are realized, and dynamic high-precision spatio-temporal information is provided for an intelligent mine transparent geologic support system.

The purpose of the present invention is to provide a method for synthesizing the acceleration waveform of a destructive earthquake at a fixed station. The method relies on the empirical Green's function method, firstly obtains a relatively accurate source model and source parameters by synthesizing the acceleration time history of a strong motion instrument, and then uses the obtained source model and source parameters in the simulation of the large earthquake acceleration waveform at a broadband seismograph, and uses the small earthquake waveform recorded by the broadband seismograph as the Green's function to synthesize the large earthquake acceleration waveform at the broadband seismograph.

A micro-motion exploration method based on Koch fractal curve, first determine the target area, then set the order N to zero, then determine the zero-order Koch triangle, then determine the first-order to N-order Koch triangle in turn, until the order N is the final value, then bring the order N into the Koch fractal curve to generate the N-order Koch triangle graph, the N-order Koch triangle graph includes a plurality of sharp points and a center point, all sharp points and the center point are the layout points of the seismograph; then lay out the seismograph on the layout points, then monitor by the seismograph to obtain the micro-motion signal, then obtain the shear wave velocity three-dimensional structure, after laying out, a plurality of Koch triangles with different edge lengths are obtained, so the micro-motion signals with different station spacings are obtained, then the shear wave velocity three-dimensional structures of multiple depths can be obtained; without multiple laying, the exploration efficiency is higher. Therefore, the design can obtain the shear wave velocity three-dimensional structures of multiple depths at the same time, and the exploration efficiency is higher.

The invention discloses a disaster-causing tectonic earthquake advanced detection device and method capable of stopping drilling along with a hole, a hollow rod body is of a double-layer structure formed by an inner pipe and an outer pipe, and an annular channel between the inner pipe and the outer pipe serves as a first water injection channel; the shock absorber is installed in the inner pipe, away from the drill bit and used for containing the node type seismograph, a second water injection channel is formed in the shock absorber, and the hydraulic pressurization system is used for injecting high-pressure water into the inner pipe. When water is injected through the first water injection channel, the strong spring, the metal impact block and the piston can be reset. According to the mode of conducting seismic detection while drilling, under the condition of adapting to the drilling seismic construction environment, drilling construction is achieved, meanwhile, the capability of detecting a front disaster-causing structure is achieved, and the advantages of being long in distance, large in range and high in precision are achieved.

The application relates to the technical field of detection equipment, and discloses a seismic signal collection device and a collection method for geophysical detection, which comprises multiple node-type seismographs; further comprises a holding frame, the holding frame is composed of two end plates, connecting frames and a handle, two connecting frames are fixed at two ends of the handle, the bottoms of the two connecting frames are fixed with the two end plates respectively, and a plurality of placing mechanisms are arranged between the two end plates; and a plurality of ground insertion rods, a plurality of insertion holes matched with the ground insertion rods are arranged on the shell of the node-type seismograph, and the plurality of ground insertion rods are correspondingly inserted into the plurality of placing mechanisms, the holding frame designed in the application can be docked with the plurality of ground insertion rods, a plurality of node-type seismographs are sleeved outside the plurality of ground insertion rods which are transversely inserted in the placing mechanisms, so that a staff member can take a large number of node-type seismographs at a time, a plurality of measuring points can be arranged at a time, and the arrangement efficiency is improved.

The invention discloses an underground structure scanning method for a controlled active source. According to the method, a known signal generated by an active source is equivalent to a record of a virtual station, the virtual station and an actual six-component seismograph station form a station pair, and the phase velocity of a wave under the distance is estimated through a phase difference / travel time difference between the virtual station and the actual six-component seismograph station and a geometric distance relationship between the source and the station; the obtained phase velocity is actually equivalent to a frequency dispersion curve at the midpoint of the connecting line of the source and the station, so that the phase velocity-depth structure from the source to the midpoint of the station can be obtained by performing inversion by using the obtained frequency dispersion curve; as the active source moves in the measurement area, a group of signals can be generated at different positions respectively, and a series of virtual midpoints are formed for the single-station six-component seismograph, so that the density of measurement points is remarkably increased in space. On the basis, through combination with an inversion result of a single station, three-dimensional underground velocity structure modeling with high credibility and high spatial resolution can be realized.

A method for detecting an underground cavity by using an irregular three-dimensional array belongs to the technical field of underground detection, and is characterized in that a plurality of high-sensitivity digital seismographs are utilized, a detection area is well covered with a ray path, and each digital seismograph collects irregular micro-amplitude vibration information of the surface of the detection area all the time; a surface wave signal is extracted from micro-amplitude vibration information, then a cross-correlation function between digital seismometers is obtained through background noise cross-correlation calculation and superposition, and a Rayleigh wave phase velocity frequency dispersion curve is obtained based on a multiple filtering and extended space autocorrelation (ESPAC) method. And finally, inverting a three-dimensional phase velocity structure below the detection area based on the frequency dispersion curve of each grid node, and performing two-dimensional or three-dimensional mapping display on an inversion calculation result through mapping software. The method is simple in field work operation, flexible in laying according to field conditions, simple and rapid in data processing flow and mature in algorithm, and can rapidly and accurately position the underground cavity position.

The invention discloses an intelligent self-stabilization very-broadband seismometer which is arranged on a platform base and comprises a shell and three mechanical pendulum bobs arranged in the shell, and further comprises a detection mechanism and an adjusting mechanism, automatic zero setting of the very-broadband seismometer is achieved through mutual cooperation of the detection mechanism and the adjusting mechanism, zero setting commands are not needed in the whole process, and automation is high. Specifically, the adjusting mechanism comprises a rotating table fixed to the table base, a mounting base is arranged on the rotating table, and a plurality of angle adjusting rods are arranged between the mounting base and the rotating table; the shell is assembled on the mounting base, the detection mechanism comprises an assembling bin covering the peripheral side of the mechanical pendulum bob, an avoiding distance is formed between the bin wall of the assembling bin and the mechanical pendulum bob, and multiple sets of distance measuring modules matched with one another are arranged on the peripheral side of the side wall of the mechanical pendulum bob and the peripheral side of the side wall of the assembling bin in the vertical direction; the distance measuring module constructs a zero setting coordinate of the mechanical pendulum bob according to distance data between the mechanical pendulum bob and the assembly bin, and the rotating table and the mounting base automatically perform zero setting on the mechanical pendulum bob according to the zero setting coordinate.

The utility model provides a low noise ultra wide band seismometer, including seismometer casing, magnetic shielding casing, heat preservation cover, trisecting mechanical pendulum and seismometer circuit, magnetic shielding casing and heat preservation cover are both arranged in seismometer casing, heat preservation cover is arranged outside magnetic shielding casing, and the seismometer circuit is arranged in the seismometer casing. The internal space of the seismometer shell is divided into a mechanical pendulum body mounting cavity and a circuit mounting cavity by the magnetic shielding shell, the three-direction mechanical pendulum body is mounted in the mechanical pendulum body mounting cavity, and the seismometer circuit is mounted in the circuit mounting cavity; the three-component mechanical pendulum body comprises three mechanical pendulum bodies, the three mechanical pendulum bodies are evenly distributed in the three-component direction by 120 degrees, each mechanical pendulum body comprises a pendulum body support, a zero setting transmission mechanism and a pendulum bob assembly, and the zero setting transmission mechanism is used for conducting zero setting on the pendulum bob assembly. According to the low-noise ultra-wideband seismometer, the observation frequency band range of the seismometer can be widened, and the self-noise level of the seismometer can be reduced.

The invention discloses an automatic leveling and locking device for a seismograph, and relates to the technical field of earthquake monitoring equipment.The automatic leveling and locking device comprises a device body and a base, the device body comprises a vibration assembly, a locking assembly connected with the vibration assembly and a linkage lifting assembly connected with the locking assembly, and the locking assembly comprises a locking frame, a motor and a screw A; the leveling device has the advantages that the motor drives the first belt wheel and the second belt wheel to drive the sliding block on the screw B to move under the action of the belt, meanwhile, the lifting plate and the sliding block on the other side are driven to move on the sliding rod, and the base is leveled in cooperation with the horizontal sensor B; two spring telescopic rods are started to drive a linkage plate at the bottom to ascend and descend at the same time, two sliding plates slide in a groove body of a connecting plate, a seismograph A and a seismograph B are adjusted in parallel through a cooperatively-arranged horizontal sensor A, and the consistency and accuracy of overall earthquake monitoring data are met.

The present disclosure relates to a seismograph, which includes: a crystal oscillator for generating a local clock signal; a data acquisition unit, coupled to the crystal oscillator and configured to acquire sampled data based on the local clock signal, and the data acquisition unit is further configured to acquire a fixed amount of sampled data within each period of the clock signal; a reference clock receiver for receiving a reference clock signal; and a controller, which is coupled to the data acquisition unit and the reference clock receiver and processes the sampled data. In addition, the present disclosure also relates to a method for managing sampled data of a seismograph, a controller, a non-transitory machine-readable storage medium, and a program product.

The invention relates to the technical field of coal mine underground geophysical exploration, and provides a coal mine underground micro-seismic source and speed simultaneous inversion method and system, and the method comprises the steps: collecting micro-seismic original data through a micro-seismic detector and a seismograph; picking up the direct wave first arrival travel time t real in the micro-seismic record; assuming an initial speed model and a seismic source position, and carrying out travel time forward modeling and ray path forward modeling to obtain theoretical travel time t < theoretical k > and a Fresnel body ray path; constructing a travel time residual term and a nonlinear objective function of a regularization constraint term based on travel time data, a speed model and a seismic source position; and solving a corresponding normal equation, inverting a speed model and a seismic source position, and outputting a final result through iterative convergence. According to the method, the coupling relation between the speed model and the seismic source position is utilized, and the joint objective function is directly optimized through inversion, so that the detection precision of the underground coal mine speed model and the seismic source position is improved.

An earthquake detection method is disclosed. The method comprises the following steps: receiving a first signal and at least a second signal, wherein the first signal is triggered in response to a first vibration state of a main detection site, and the at least a second signal is triggered in response to at least a second vibration state of at least a backup detection site; determining whether a quantity of those being enabled among the at least a second signal satisfies a quantity ratio condition, and determining whether the first signal and the quantity of the at least a second signal are both enabled at a specific time point, wherein the first and the quantity of the at least a second signals respectively have a first and at least a second initial enabled time points; and determining there is a real earthquake event when an interval between the first and the at least a second signal satisfies a time relationship.

The application discloses a node seismic data transmission method and system based on piggyback communication. The method comprises the following steps: a user end generates a piggyback instruction based on the file name of seismic data files needing retransmission and the corresponding node seismic instrument equipment ID and sends the piggyback instruction to a cloud server; the cloud server judges whether the piggyback instruction relative to the node seismic instrument is received in response to a communication link establishment request sent by the node seismic instrument, and if yes, sends the piggyback instruction to the node seismic instrument together with a response message relative to the communication link establishment request; the node seismic instrument judges whether the piggyback instruction is contained in the message sent by the cloud server, and if yes, performs seismic data time-sharing transmission first, and then sends the seismic data files needing retransmission to the cloud server. The system comprises various functional modules for realizing the above steps. According to the application, the problem that the seismic data file transmission is incomplete or lost in the process of existing seismic data file time-sharing transmission can be solved.

The invention discloses an integrated mobile VS30 measuring device, a design method and a measuring method, and belongs to the field of geological prospecting. The integrated mobile VS30 measuring device comprises a mobile seismic source vehicle and a mobile measuring array which is in traction connection with the mobile seismic source vehicle through a land towing cable; the mobile measurement array is composed of a plurality of node seismographs which are uniformly arranged on a land towing cable and are slidably coupled with the ground, and the node seismographs are communicated with a master control terminal carried on the mobile seismic source vehicle. By adopting the integrated mobile VS30 measuring device, the design method and the measuring method, rapid and continuous measurement can be realized through mobile seismic source vehicle-towing cable-node type earthquake, and meanwhile, the measurement precision and reliability are ensured by utilizing the joint inversion of GLM-XGBoost (improving the nonlinear fitting precision), so that the engineering requirements of urban site classification, evaluation and the like are comprehensively met.

The present application relates to seismic instrument testing technology, and discloses a seismic instrument testing method based on data communication, which comprises the following steps: a host computer is connected with a seismic instrument through handshaking, and the seismic instrument obtains testing instructions from the host computer; the testing instructions are analyzed to obtain a testing type and enter a testing mode; when the testing type is index testing, the seismic instrument is tested according to the testing instructions to obtain a first testing result; when the testing type is state testing, the seismic instrument is tested according to the testing instructions to obtain a second testing result; the first testing result and the second testing result are sent to the host computer, and the testing mode is exited; the seismic instrument is updated according to the testing data, and the testing is completed after the updating is finished. The present application also discloses a seismic instrument testing device based on data communication, an electronic device and a storage medium. The present application can improve the seismic instrument testing efficiency.

The utility model relates to the technical field of earthquake monitoring, and discloses an earthquake monitoring station field calibration device comprising a supporting seat; the rotating disc is rotationally connected to the supporting seat, and a pointer is arranged on the rotating disc; the supporting seat is located on the peripheral side of the rotating disc and provided with a dial, the dial is provided with scale marks, and the pointer points to the scale marks; the north seeker is mounted on the rotating disc, the north seeking direction of the north seeker is the same as the direction of the pointer, and the north seeker and the pointer rotate synchronously. According to the utility model, the north seeker is arranged on the rotating disk, the north seeker can determine the true north direction value of an attached carrier by measuring the rotation angular velocity of the earth, the process is not interfered and influenced by an external magnetic field or other environments, the north seeker and the pointer synchronously rotate, and when the orientation direction of the pointer is true north direction, the north seeker and the pointer are in real north direction. A seismometer may be mounted in this direction. Therefore, the installation precision of the seismometer is improved, manual operation errors are reduced, and the precision of earthquake monitoring and early warning is improved.

The invention relates to a dense array seismograph embedding switchable hole pattern hole forming device and a use method, the device comprises a main drill assembly, a cantilever cutter assembly, a feeding control assembly and a controller, the main drill assembly comprises a rotary power part, a transmission part, a drill rod and a main rack, the rotary power part is arranged in the main rack and is sequentially connected with the transmission part and the drill rod, and the cantilever cutter assembly is arranged on the main rack and is connected with the transmission part and the drill rod; the cantilever cutter assembly comprises a plurality of cantilevers, a cutter, a second connecting piece and an adjusting unit, each cantilever comprises a connecting part and a measuring part, the measuring part is provided with a guide sliding groove, the sliding block is in sliding connection with the guide sliding groove, the two ends of the second connecting piece are connected with the sliding block and the cutter respectively, and the locking mechanism is arranged on the sliding block to lock the position of the sliding block. The feeding control assembly comprises a feeding power piece, a shell and a support, the top end of the feeding power piece is connected with the shell, the bottom end of the feeding power piece is connected with the main rack, and the connecting part of the cantilever is connected with the main rack through a detachable first connecting piece. Therefore, according to the design, rapid switching between the round hole and the square hole can be achieved on the same device.

The present application provides a kind of microseismic acquisition method, comprising the following steps: S1: connect detector to seismograph by cable, arrange detector according to design;S2: start microseismic data measurement, obtain the microseismic data of one measuring point or one arrangement;S3: move detector to next measuring point or arrangement;S4: repeat the measurement of steps S2 and S3;S5: collect the measurement signal of each detector, calculate the distance between base point and measuring point according to the position coordinates of base point and measuring point;S6: the measurement data of base point and measuring point are cross-correlated in frequency domain, and the correlated trace gather is formed;S7: for the arrangement of n detectors, at least n-3 correlated trace gathers of arrangement can be extracted;S8: use correlated trace gather to extract dispersion curve, and carry out transverse wave velocity inversion and other result drawing.The present application realizes the cross-correlation of linear arrangement or array in working area through base point measurement, improves the calculation accuracy of dispersion curve between array, and achieves the purpose of fine detection.

The present invention discloses a gravity self-adaptive device for a seabed complex terrain seismograph, which includes a spherical sealed housing, a load-bearing frame, a contact sliding member, a seismometer bearing box, and a gravity pendulum. The spherical sealed housing is used to isolate seawater and accommodate the load-bearing frame, the contact sliding member, the seismometer bearing box, and the gravity pendulum. The load-bearing frame is used to install and fix the contact sliding member, the seismometer bearing box, and the gravity pendulum. The contact sliding member is installed and fixed on the outer side of the load-bearing frame and is in sliding contact with the inner side of the spherical sealed housing. The seismometer bearing box is used to carry and fix the seismometer. The gravity pendulum is used to carry heavy objects and make the BHZ component always vertically downward by relying on the gravity of the heavy objects. The present invention does not require a motor drive to make the device vertical, is safe and stable and has no additional power consumption, and can enable the instrument to obtain a longer seismic recording time. The device is stable, easy to process, and low in cost, and is suitable for mass production and application. It is convenient to install and disassemble and is easy to carry, with strong adaptability.

The application discloses a ground collapse detection and early warning scheme based on real-time three-dimensional imaging, and a method thereof comprises the following steps: acquiring background noise data of a target underground structure through a seismometer array installed at a target underground structure detection site; then, surface wave extraction and dispersion curve calculation are carried out based on the background noise data measured by the seismometer; imaging of the underground three-dimensional structure is carried out through a seismic interference imaging technology, the change of the wave velocity of the underground medium is monitored, so that the abnormal area of the velocity structure is identified and positioned, and a reliable basis is provided for identifying the precursor information of the ground collapse. The technical scheme provided by the application can realize real-time monitoring and early warning of the ground collapse risk which is prone to occur in cities in the field of city safety risk monitoring, early warning and management and control, improve the city ground collapse early warning and emergency disposal capacity, and greatly reduce the collapse risk hidden danger and guarantee the safety of people's lives and property.

The invention provides a debris flow disaster early warning method and system, and the method comprises the following steps: S1, carrying out the real-time analysis of a real-time data flow monitored by a current seismograph through an asynchronous sliding monitoring mechanism based on a long-time window and a short-time window, and intercepting a first abnormal waveform; s2, outputting a probability value that the first abnormal waveform is a debris flow earth sound signal, and if the probability value is greater than a threshold value, turning to step S3; s3, matching a second abnormal waveform associated with the first abnormal waveform in the adjacent seismograph based on an arrival time association criterion of propagation of the debris flow earth sound signal in spatial distribution; s4, counting the number of second abnormal waveforms meeting debris flow waveform characteristics, if the number is greater than a preset value, forming a debris flow event together, and going to step S5; and S5, carrying out quantitative analysis on the waveform characteristics of the first abnormal waveform and the second abnormal waveform in the debris flow event, and carrying out graded early warning.

The invention provides a building structure seismic wave velocity change extraction method, device, equipment and program product. The method comprises the following steps: deploying seismometers at a plurality of floors of a target building to continuously collect a microseismic time sequence of each of the plurality of floors in a specified direction; and based on the micro-seismic time sequence of each adjacent floor, calculating an interference result corresponding to each adjacent floor, and performing inverse Fourier transform through the interference result to obtain an impulse response function corresponding to each adjacent floor. And determining travel time offset of the pulse response function corresponding to each adjacent floor and a reference pulse response function, and performing linear fitting on the travel time offset to obtain seismic wave velocity change of each adjacent floor.

This invention provides a method for linking earthquake warnings with the identification of the number of people inside a room. [Solution] The method includes acquiring seismic waves in real time using an acceleration sensor, performing band-pass filtering to obtain seismic waves with a high signal-to-noise ratio, determining the maximum acceleration, maximum velocity, and maximum displacement based on the seismic waves with a high signal-to-noise ratio, predicting the seismic intensity of a seismometer, acquiring earthquake parameters announced by the national public warning system, acquiring the location of the building inside and the seismic design intensity, calculating the source distance based on the epicenter, source depth, and location of the building inside, calculating the earthquake warning intensity from the magnitude and source distance, calculating the earthquake intensity from the seismometer intensity and the earthquake warning intensity, acquiring the number of people inside in real time using a human presence sensor, determining the linked alarm level based on the earthquake intensity, seismic design intensity, and number of people inside, and issuing an alarm and transmitting alarm information according to the linked alarm level.

The utility model discloses a general auxiliary control box for a seismometer, relates to an auxiliary device for mounting and maintaining the seismometer, and aims to solve the problem of inconvenience in observation caused by the fact that the conventional seismometer and a data acquisition unit are not placed in a station at the same place. The key circuit is used for inputting an operation instruction; an instruction signal output end of the key circuit is connected with an instruction signal input end of the main control circuit; the main control circuit is used for receiving an instruction signal and generating a control signal according to the instruction signal; meanwhile, a control signal is sent to the seismometer; the processor is also used for receiving feedback signals of the seismometer and generating the running state of the seismometer according to the feedback signals; and the display signal input end of the display is connected with the display signal output end of the main control circuit. The beneficial effects are that the cable is directly connected to the seismometer, the display can be used to directly check the operation condition of the seismometer on site, and the use is very convenient.