1923 results about "Deformation monitoring" patented technology

The invention relates to a tunnel surrounding rock deformation monitoring method and a monitoring system thereof. The monitoring method is as below: (1) firstly, a laser is fixed on the inner wall of a stabilized tunnel surrounding rock, then a fixed photosensitive displacement signal monitor is arranged on a preliminary bracing of an unstable surrounding rock in the constructed tunnel, and the signal output end of the laser is opposite to the signal receiving end of the photosensitive displacement signal monitor; (2) during the monitoring, the laser sends a real-time laser signal to the photosensitive displacement signal monitor used for receiving laser signals, and in the monitoring process, the photosensitive displacement signal monitor sends monitoring data on the deformation displacement of the unstable surrounding rock to a signal processing terminal; and (3) the signal processing terminal performs automatic analysis according to collected data, and when the deformation displacement value of the surrounding rock reaches or exceeds a dangerous deformation value, the signal processing terminal sends an alarm signal via an alarming system. The method and the system thereof are favorable for reducing and avoiding casualty and loss caused by serious tunnel and laneway collapse so as to improve the construction safety.

The invention relates to a building deformation monitoring method based on InSAR. The method includes the following steps that S1, InSAR original data is screened; S2, PS points are extracted and screened in a monitored region; S3, geometric phase positions of the PS points are removed; S4, the space deformation quantity of a building is solved; S5, according to the solved deformation quantity, the gradient of the building is calculated; S6, monitoring is carried out on time dimension, the steps are repeated, a monitoring differential value is obtained, and the deformation quantity and deformation rate of the building are obtained. By the utilization of the InSAR technology, the deformation field of the building in the direction of a radar sight line is obtained, spatial interpolation is carried out on pixels in the deformation field in the direction of the radar sight line, wherein the coherence of the pixels is lower than an untwisting threshold value, and therefore a spatial continuous deformation field is obtained; by processing and calculating obtained data, the deformation and deformation rate of the building are obtained. The method is large in range and low in cost and easily monitors the building for a long term during monitoring of the building, and can effectively make early warning for accelerated deformation of the building.

The invention provides a time sequence InSAR (Interferometric Synthetic Aperture Radar) deformation monitoring method and a device based on a polynomial inversion model. The method comprises the following steps of: combining N SAR (Synthetic Aperture Radar) single look complexes of a certain region to generate M interference pictures and generate M differential phase pictures; calculating an average coherent coefficient picture and extracting high coherent points; establishing a polynomial inversion model by carrying out difference again on a differential phase of the two adjacent high coherent points; solving relative polynomial deformation and a relative elevation error of the adjacent points respectively integrating by taking a certain high coherent point provided with known deformation amount and a DEM (Dynamic Effect Model) error as a reference point to obtain the polynomial deformation and the elevation error of each high coherent point; after a phase of the polynomial inversion model is obtained, subtracting the phase of the polynomial inversion model from the differential phase of the high coherent points to obtain a residual phase; and extracting residual deformation from the differential phase to be overlapped with the polynomial deformation to obtain ground surface deformation information of the high coherent points. The method provides a solution for highly-precisely monitoring the ground surface deformation.

A microcomputer-controlled electro-hydraulic servo rock tri-axial dynamic shear-seepage coupling multifunctional test method belongs to the technical fields of rock mechanics and engineering technology and is characterized in that a test apparatus is composed of a loading system, a sealing system, a multiphase fluid injection system, an acoustic emission monitoring system, a deformation monitoringsystem and a data collection system. The test method not only solves technical problems that a tri-axial pressure chamber cannot be used for performing large displacement shear-seepage coupling of rocks under high confining pressure and high seepage pressure, and also can achieve various extended functions on the basis of the technology. The apparatus can achieve servo control loading of force, displacement and strain rate in shear direction and injection seepage of a multiphase fluid during dynamic shear. In addition, the apparatus is equipped with a temperature control system for performingconstant temperature control to the tri-axial pressure chamber at 0-200 DEG C; therefore, a series of extended experiments of dynamic shear-seepage coupling features of rocks under effect of temperature can be carried out.

The invention discloses a tunnel construction informatization dynamic monitoring system and a monitoring method thereof. The system comprises an industrial personal computer, a PLC (programmable logic controller) wireless controller, a high-configuration digital camera, a deformation monitoring sensitization part, digital display acquisition equipment, wireless transmission equipment and a dynamic design feedback device. The method includes: 1), controlling commands to be transmitted to the PLC wireless controller by a computer control main station and controlling the digital camera and the digital display acquisition equipment; 2), acquiring internal force monitoring data by the aid of the digital display acquisition equipment; and acquiring a deformation monitoring image via the deformation monitoring sensitization part by the digital camera; 3), transmitting a monitored value to the computer control main station by the aid of the wireless transmission equipment; 4), analyzing results by the computer control main station via a real-time analysis module; and 5), transmitting the analyzed results to the dynamic design feedback device, analyzing relative difference of the really monitored value and a standard value, and early warming in real time by an early warning module. The tunnel construction informatization dynamic monitoring system is scientific, safe and practical, the method is convenient, instant, fast and effective, and safety problems in construction monitoring of tunnels are avoided.

The invention discloses a building overall-deformation monitoring method based on a three-dimensional laser scanning technology. The method includes the following steps: obtaining building point cloud data, segmenting the point cloud data, regularizing the data, performing deformation analysis on a point cloud model and judging a building overall-deformation condition. The building overall-deformation monitoring method based on the three-dimensional laser scanning technology is capable of rapidly extracting three-dimensional space characteristics of the point cloud model from the building mass point cloud data and the space characteristics have rotation and translation invariance so that attitude of the building in a three-dimensional space can be expressed uniquely and according to the variance condition of the three-dimensional space characteristics of the building point cloud model, the overall deformation condition of the building, such as sedimentation, inclination and rotation and the like in the three-dimensional space can be analyzed and judged. The building overall-deformation monitoring method based on the three-dimensional laser scanning technology makes full use of complete point cloud data of the surface of the building to analyze the overall deformation condition of the building and the measurement and analysis technology based on faces effectively prevents locality and one-sidedness brought by a deformation analysis result in traditional deformation monitoring based on points.

The invention provides a deformation monitoring method based on vision measurement, and belongs to the technical field of deformation monitoring. The deformation monitoring method comprises the following steps that the mark plate of deformation monitoring is designed, wherein the mark plate is formed by a white baseplate and four black circular sheets which are arranged on the baseplate, the boundaries of the circular sheets cannot be tangent, intersected or overlapped, the connecting line of the center of the circle of the two circular sheets is a first connecting line, the connecting line of the center of the circle of the rest two circular sheets is a second connecting line, and the first connecting line and the second connecting line are perpendicular and intersected; characteristic contour models of different resolutions are established; subsequent images of different time points are acquired, and the elliptic center coordinates on the subsequent images, i.e. the coordinates of mark points, are accurately extracted; and the displacement of the mark points in the subsequent images is calculated, and the calculated displacement is corrected so that the actual displacement of the mark points is obtained. The deformation monitoring method based on vision measurement is easy to operate, high in degree of automation, low in cost, high in precision, simple in data processing and high in efficiency.

A method for inversion of the ground feature high elevation and the number of land subsidence through high resolution InSAR timing sequence analysis includes the first step of high resolution SAR data selection, the second step of initial elevation phase estimation, the third step of selection of InSAR timing sequences, analysis of an interference image pair data set and extraction of coherent target candidate points, the fourth step of elevation phase correction and linear deformation component estimation, and the fifth step of deformation sequence estimation of coherent targets. According to the method, the defect that no high resolution DEM is available for removal of high-rise building additional phases in urban area high resolution InSAR deformation monitoring data processing can be overcome, the additional phases and deformation phases of urban high-rise buildings in the high resolution InSAR are effectively separated, and therefore monitoring precision of the high resolution InSAR in urban area land subsidence is greatly improved.

A comprehensive monitoring system for a side slope and a landslip is capable of comprehensively monitoring surface displacement and depth displacement of a slope body, soil pressure of a retaining structure, and internal force of an anchoring structure, and realizing high-efficient acquisition and automation treatment of data. The comprehensive monitoring system for the side slope and the landslip comprises a side slope surface displacement monitoring unit, a side slope supporting structure stress monitoring unit, a side slope interior deformation monitoring unit and a data acquisition and transmission device, wherein the side slope surface displacement monitoring unit is arranged on a side slope surface and adopts a stay cord type fiber bragg grating displacement sensor; and two ends of the side slope surface displacement monitoring unit are respectively fixed on the side slope surface and the top of a slope body retaining structure; the side slope supporting structure stress monitoring unit consists of fiber bragg grating pressure boxes vertically embedded on the back of the slope body retaining structure at intervals, and a fiber bragg grating force gauge arranged on a slope body anchoring component; the side slope interior deformation monitoring unit is a fiber bragg grating intelligent anchoring rod embedded in the slope body by drilling a hole; and the data acquisition and transmission device consists of a multi-channel wavelength demodulator and a monitoring computer.

The invention discloses a heritage site deformation monitoring method based on the distributed scatterer temporal interferometric SAR technology. The method comprises the following steps: firstly determining monitoring areas of a heritage site and collecting relevant information; performing mutual registration, radiation correction and image cutting preprocessing on collected SAR images then, and extracting permanent scatterer objects and distributed scatterer objects; removing topography and flat ground phases of the distributed scatterer objects, and optimizing phase estimation through adoption of maximum likelihood estimation and the LBFGS technology; fusing the permanent scatterer objects at initial phases and distributed objects at optimized phases then, setting short time / space baseline thresholds so as to generate small baseline set interference pairs, performing phase upwrapping on the small baseline set interference pairs, and removing errors caused by topographical and atmospheric delays; and finally solving an average annual deformation rate and a deformation history change value. Deformations of heritage sites can be monitored through the method, the problem that suburbs have rare extractable points is overcome, the method is suitable for multi-scale stable monitoring from a single historic building to a whole heritage site, and the method is in favor of assessing of heritage site influence factors.

The invention discloses a single-difference filtering-based deformation monitoring GNSS (global navigation satellite system) signal multi-path correction method. On the basis of the spatial correlation characteristics of inter-receiver single-difference observation residuals, a single-difference filtering method is adopted to fix ambiguity and extract a carrier pseudo-range observation residual; fast Fourier transform analysis and wavelet de-noising are performed on the data residual, so that a discrete multi-path correction map and a reflection multi-path spatial correction map are established; and therefore, influence on GNSS carriers and pseudo-range observation values caused by a multipath effect in a bridge deformation monitoring environment can be decreased. According to the method of the invention, the spatiotemporal repetition characteristics of multiple paths are utilized. With the single-difference filtering-based deformation monitoring GNSS signal multi-path correction method adopted, the reliability and success rate of ambiguity fixation can be effectively improved, and single-epoch calculation accuracy of dynamic monitoring can be improved.

The invention provides a dam slope deformation monitoring system and method. According to the monitoring system, an unmanned aerial vehicle photogrammetry system is utilized to monitor dams in the whole reservoir area, and an encrypted monitoring area with large deformation quantity and large digital elevation difference (a steep slope) is determined; in the encrypted monitoring area, a ground-based interferometric radar measurement system is utilized to determine a first level key area with larger deformation quantity; in the first level key area, a ground-based three-dimensional laser radarsystem is adopted to select a second level key area with larger deformation quantity, a global navigation satellite system (GNSS) is adopted in the second level key area to determine a key monitoringparticle with high deformation speed, and a micro core pile is utilized to monitor and forewarn the collapse process of the key monitoring particle area. According to the dam slope deformation monitoring system and method, precise positioning of the collapse position of the dams in the whole reservoir area and integrated monitoring and early warning of space, air and ground are achieved through time seamless monitoring from slow to fast to the instant of collapse and full coverage monitoring from large area to small area to particle and from two-dimensional to three-dimensional space variation.

The invention relates to a high-precision deformation monitoring method of a wide-area electric iron tower based on a Beidou system. The high-precision deformation monitoring method comprises the following steps: judging whether real-time dynamic centimeter-grade monitoring requirements are met or not according to monitoring precision of a Beidou foundation CORS network; if so, obtaining iron tower monitoring data through a network RTK virtual reference station method; otherwise, obtaining the iron tower monitoring data through a double-monitoring-point base line attitude measurement method; processing and analyzing the monitoring data, and calculating an inclined angle and a sedimentation value of the iron tower; if the inclined angle and the sedimentation value of the iron tower exceed limit requirements of operating regulations of a power transmission line, determining a tower position coordinate and issuing a field inspection and maintenance instruction; if the inclined angle and the sedimentation value of the iron tower do not exceed the requirements of the operating regulations of the power transmission line, judging an inclining trend of the iron tower. The monitoring method provided by the invention can be used for carrying out all-weather, all-time and automatic monitoring on the wide-area electric iron tower; potential safety hazards are found and warned in time, and the manual inspection cost is effectively reduced.

The invention discloses a method for measuring deformation of an underground diaphragm wall. In the aspect of data acquisition, a three-dimensional laser scanner is adopted and is capable of quickly measuring three-dimensional coordinates of the underground diaphragm wall; working base points are used as joint control points, a control network is established through the layout of deformation monitoring working base points and datum points, the underground diaphragm wall and the working base points can be simultaneously scanned, and point clouds of the underground diaphragm wall can be registered in an absolute coordinate system of the control network. In the aspect of data processing, a point cloud regular gridding modeling technology is adopted to reconstruct a three-dimensional model of the underground diaphragm wall. By comparing the three-dimensional models of the underground diaphragm wall in different periods, the deformation of all the positions of the underground diaphragm wall can be obtained. Through the method, the overall deformation of the underground diaphragm wall can be measured in the excavation process of a foundation pit, monitoring points do not need to be laid, interference on the construction is reduced, the measuring efficiency is high, and comprehensive monitoring data are provided for the excavation of the foundation pit.

The invention relates to a total station collimation line method horizontal displacement observation platform. The total station collimation line method horizontal displacement observation platform comprises a foundation support, a slideway which is arranged on the foundation support, a collimation part which is perpendicular to the foundation support and can slide along the slideway, a pointer which is fixed on the bottom of the collimation part, a scale surface which is arranged on the foundation support and corresponds to a reading pointer and a laser. When the observation platform is in use, the scale surface of the total station collimation line method horizontal displacement observation platform is closely fit to a moved deformation monitoring point, an observation direction is determined by virtue of laser transmitted by the laser, the scale surface is adjusted to be perpendicular to a collimation plane, three adjusting screws are rotated to guarantee the levelness of the foundation support, an initial scale value, which is aligned at the center of the deformation monitoring point, of the observation platform at the moment is recorded, a deformation monitoring point is found, the collimation part is horizontally moved by an operator of the observation platform, a reflecting plate with a collimation crossing on the collimation part is overlapped with a cross wire in a total station telescope, the scale value corresponding to the reading pointer is recorded, and the initial scale value is subtracted from the scale value to obtain the displacement of the deformation point deviated from the collimation plane, namely the displacement of the deformation point relative to an original position. The total station collimation line method horizontal displacement observation platform is simple in structure and convenient to operate.

The invention discloses a mining area earth surface time sequence deformation monitoring method based on a time domain discrete InSAR interference pair. The time domain discrete InSAR interference pair not covering the whole time sequence process is obtained; highly coherent points in the time domain discrete InSAR interference pair are obtained; a relationship equation set of mining area dynamic sedimentation model parameters and unwrapping phases of the highly coherent points in the time domain discrete InSAR interference pair is built, and dynamic sedimentation model parameters of the highly coherent points are estimated based on the equation set; the time sequence deformation of the mining area earth surface can be estimated anytime through the parameters, and therefore mining area earth surface time sequence deformation monitoring based on the time domain discrete InSAR interference pair is achieved. The mining area earth surface time sequence deformation monitoring method based on the time domain discrete InSAR interference pair achieves monitoring of the mining area earth surface time sequence deformation through the discrete InSAR interference pair not covering the time sequence process, is ingenious in concept, is simple in process, is accurate and effective in monitoring effect, largely widens the application prospects of the InSAR technology, and lowers mining area time sequence deformation monitoring cost and technical limitations.

The invention discloses an intelligent tunnel construction security monitoring system comprising a deformation monitoring sensor group, a video data collecting module, an environment monitoring sensor group, a monitoring point internal stress collecting module, a data processing module, a central processing unit, a prediction analysis module, an expert evaluation module, a dangerous action judgment module, a mathematical model building module, a virtual actuator, a virtual sensor and a man-machine operation module. According to the intelligent tunnel construction security monitoring system, omni-directional real-time detecting on a tunnel construction situation is achieved so as to obtain various evaluation results of the tunnel construction situation, detecting results are high in accuracy, additionally, by building a tunnel construction mathematical model, prediction and simulative analysis of the follow-up situation of tunnel construction are conducted, problems in the tunnel construction process can be discovered timely, and a reasonable selection of tunnel construction schemes is achieved; and the intelligent tunnel construction security monitoring system has the function of automatic evaluation of dangerous actions and dangerous environments, and construction safety of construction personnel is further guaranteed.

The invention discloses a landslide early warning method and system. The system comprises a landslide deformation monitoring net and a comprehensive early warning unit. The landslide deformation monitoring net is composed of a satellite positioning base station and three or more satellite positioning monitoring stations. The satellite positioning monitoring stations are distributed at different monitoring points of the earth surface of a monitoring target. Each satellite positioning monitoring station is connected with a satellite positioning base station so that RTK positioning and calculating can be realized. The positioning results of all the satellite positioning monitoring stations are all transmitted to the comprehensive early warning unit. By monitoring the target overall posture and precisely calculating the displacement, deformation displacement predicting is realized; by fusing multi-source monitoring information, comprehensive early warning is realized. The system has the advantages of being high in early warning precision, simple in algorithm, easy to obtain and high in practicability, and can meet the actual requirements for landslide deformation early warning.

The invention provides an on-line monitoring method of overall three-dimensional deformation of wind wheel blades in working states. The on-line monitoring method comprises the steps of selecting a wheel hub center as a fixed mark point, selecting another mark point at the root of each blade, and adopts marks in different shapes before a wind generator unit operates, obtaining overall three-dimensional coordinates of the wind wheel blades in static states with two digital cameras, when the wind generator unit operates, determining rigid body rotation angles of the wind wheel blades according to relative positions of the mark points in the working states and the static states, calculating to obtain the three-dimensional coordinates of the deformed wind wheel blades in the working states according to image plane coordinates after removing rigid body rotation displacement, and obtaining overall three-dimensional displacement values and strain values of the wind wheel blades in the working states according to differences of the three-dimensional coordinates before and after the deformation of the wind wheel blades. The method has the on-line, non-contact, overall and three-dimensional advantages and the like, can obtain overall three-dimensional displacement and strain of the wind wheel blades in the working states, and achieves monitoring of the deformation of the wind wheel blades in the working states.

The invention discloses a deflection sensor for monitoring bridge deformation and a deflection measuring method. The deflection sensor consists of a measuring plate, a reflecting grating and a supporting arm, wherein the measuring plate is fixed on measuring points on the bridge; the reflecting grate is fixed on the supporting arm; and the two ends of the supporting arm are fixed on two neighboring measuring points of the measuring plate. According the deflection sensor, the deflection measuring method is that, the deflection sensors are arranged on two horizontal measuring lines, the sensors on the same horizontal measuring line are in end-to-end connection, and a measuring point interval is reserved between the sensors on the two horizontal measuring lines on the horizontal position. The deflection sensor for monitoring the bridge deformation and the deflection measuring method have the advantages of high precision, high speed, non contact, low power consumption, small size, and wireless design, and can be used for measuring the vertical and the horizontal deflection of the deformation of all sorts of roads and bridges.

The invention discloses a Beidou precision deformation monitoring and early warning system. The system comprises a sensor subsystem, a communication subsystem and a monitoring center subsystem; the sensor subsystem is connected with the monitoring center subsystem through the communication subsystem; the sensor subsystem comprises a Beidou base station sensor, a Beidou monitoring station sensor and an auxiliary sensor; and the monitoring center subsystem includes a database, a data solving part and a data analysis part. With the system adopted, the defects of high cost, poor stability and narrow application field of GNSS technology in the precision deformation monitoring field can be effectively eliminated.

The invention discloses a subway shield construction surface deformation warning method based on temporal and spatial information fusion. According to the method, shield construction surface deformation warning sign fusion and regional warning decision fusion are realized by combining an information fusion theory and a hierarchical fusion thought with surface deformation monitoring information and through a feature fusion algorithm based on a RBF neural network and a decision fusion algorithm based on a D-S evidence theory. A warning means and informationization tool integrating the functions of alarm identification, alarm analysis, alarm prediction, alarm evaluation and alarm decision is provided for the construction site. The method is of important significance to the enhancement of shield construction surface deformation safety risk monitoring and the improvement of shield construction safety risk management level.

The invention provides a fine structure deformation monitoring method based on ground three-dimensional laser scanning. The method comprises steps that, a GPS or a total station is utilized to arrange artificial target points, and a target point monitoring net is established; point cloud data at a surface of a structure at different moments are acquired by utilizing a ground three-dimensional laser scanner; data acquired by the target point monitoring net and data acquired by the ground three-dimensional laser scanner are converted to a same reference coordinate system; the data in the same reference coordinate system are utilized to determine and fit a geometrical model of the structure; point cloud data segmentation is carried out according to the geometrical model of the structure obtained through fitting, the point cloud data segmentation is divided into multiple parts, and each part is fitted into one representative point; change of coordinates and vectors of the representative points obtained through point cloud data fitting at different moments are contrasted to carry out fine structure deformation analysis. The fine structure deformation monitoring method can realize monitoring on fine structure deformation.

The invention belongs to the technical field of three-dimensional detection of subway tunnels, and discloses a vehicle-mounted measurement device of three-dimensional deformation monitoring of subwaytunnels based on reference transmission. A rotatable laser distance measurement system for high-speed distance measurement and angle measurement is integrated by a laser range finder, an inclination angle sensor, a high-precision turn table and a PLC controller together; a tunnel section outline is measured in a discrete multi-point mode; meanwhile, in combination with a photoelectric encoder installed on a distance measurement wheel at the bottom of a tunnel detection vehicle, a fixed displacement amount of the detection vehicle between a starting position and a travelling position on an axial direction of the tunnel is obtained, a program is triggered, and the detected data of the specific position in the tunnel are transmitted to an upper computer by a wireless communicator. The vehicle-mounted measurement device disclosed by the invention makes breakthroughs in the practical technical innovation of the online monitoring of the tunnel structure safety, lays a foundation for forminga technical system for the reliability design, analysis, test and evaluation of rail transit facilities, and has practicality in many fields.

The embodiment of the invention provides a subway subgrade structure monitoring method and device based on foundation InSAR. The method comprises the steps of using a radar sensor for repeatedly observing a target area on a linear scanning slide rail, and obtaining a synthetic aperture radar SAR image in about 10 seconds; matching image elements representing the same object in the target region inthe two SAR images to the same position, carrying out image registration; subjecting an interference image pair after image registration to conjugate multiplication (as shown in the description) to obtain an interference phase graph; carrying out noise filtering processing on the obtained coherent graph gamma; carrying out phase unwrapping on the coherent graph gamma subjected to noise filteringprocessing; carrying out atmospheric correction on the coherent image gamma subjected to phase unwrapping to obtain a deformation graph of the target area; carrying out geocoding on the deformation graph of the target area under the radar coordinate system, projecting to the geographic coordinate system, and obtaining a geographic coded deformation graph. High-precision and continuous deformationmonitoring of the whole area of the subway elevated and roadbed structure can be implemented under the extreme weather conditions or long distances (4Km) range.

A microcomputer-controlled electrohydraulic servo rock triaxial dynamic shear-seepage coupling multifunctional test apparatus belongs to the technical field of rock mechanics and engineering and is characterized by comprising a loading system, a sealing system, a multiphase fluid injection system, an acoustic emission monitoring system, a transformation monitoring system and a data acquisition system. The apparatus of the invention has the advantages that the technical problem can be solved that an existing triaxial pressure chamber is unsuitable for performing rock large-displacement shear-seepage coupling under high confining pressure and high osmotic pressure; various extended functions based on the shear-seepage coupling technique can be achieved; servo controlled loading of shear-directional force, displacement and strain rate can be achieved, multiphase fluid injection and seepage during dynamic shearing can also be achieved; in addition, a temperature control system is also provided and is suitable for constant temperature control from 0 DEG C to 200 DEG C for the triaxial pressure chamber, so that a series of extended tests such as rock dynamic shear-seepage coupling characteristic test under temperature action can be carried out.

The invention relates to a method and a system for monitoring horizontal deformation of a soil body in a mined-out subsidence area and a method for constructing the system. A fiber grating sensor network a(3) monitors the horizontal deformation of a soil body above a pipeline a(2) in real time, acquired data passes through an optical cable a(5) and an optical switch (6) and is demodulated by a fiber grating demodulation instrument (7) and transmitted to a lower computer (8), and the lower computer (8) calls a self-compiled program to control the optical switch (6) and the fiber grating demodulation instrument (7), so that the data is acquired and preprocessed; the preprocessed data is transmitted by a general packet radio service (GPRS) communication module a(9), received by a GPRS communication module b(10) and transmitted to an upper computer (11); and the upper computer (11) analyzes the horizontal deformation data of the soil body, and determines the stable state of the soil body in the mined-out subsidence area and the safety state of the pipeline according to the change of a monitoring curve and a monitoring numerical value.

The present invention discloses a building deformation monitoring system and method based on Beidou ground based augmentation. The monitoring system comprises a data collection module, a data transmission module, a data processing platform and a monitoring early warning platform. The data collection module comprises a GNSS antenna, a GNSS receiver and an inclination angle sensor. The data processing platform collects data transmitted by the data collection module in real time by employing the data transmission module, and performs decoding, resolving and storage. The monitoring early warning platform comprehensively analyzes and displays displacement, settlement and inclination deformation information of a building calculated in real time. Therefore, functions such as remote real-time monitoring, real-time analysis and automatic alarm are achieved. The building deformation monitoring system and method based on Beidou ground based augmentation are reasonable in design and clear in structure, can perform automatic monitoring and early warning for building deformation in real time, and employ a Beidou ground based augmentation system base station to provide a reference for real-time difference and resolving service after the event, so that the monitoring efficiency and the position precision are improved, and the monitoring cost is saved.