CN102435165A - CNSS-based ground facility deformation long-term monitoring system and method - Google Patents

Abstract

The invention discloses a system and a method for monitoring surface deformation, in particular to a CNSS-based system and a CNSS-based method for monitoring deformation of ground facilities for a long time. The monitoring system comprises a positioning monitoring module, a CNSS (Beidou satellite navigation System), a data processing module and a client terminal; the monitoring method comprises the following specific steps: 1. building a long-term monitoring system of ground facility deformation based on CNSS; 2. receiving positioning information by the monitoring points and the reference points; 3. the data processing module processes the positioning information; 4. the data processing module generates an early warning signal and prediction information and sends the early warning signal and the prediction information to the client terminal. The invention can carry out large-scale, long-time, all-weather and uninterrupted real-time monitoring on the deformation of the ground facility, thereby improving the monitoring precision; the method is not influenced and limited by distance, weather conditions and geographic environment, does not need additional manual intervention and transmission equipment, greatly reduces the cost, and is convenient to maintain and popularize.

Description

Long-term monitoring system and method for deformation of ground facilities based on CNSS

technical field

The invention relates to a monitoring system and method for surface deformation, in particular to a CNSS-based long-term monitoring system and method for ground facility deformation.

Background technique

At present, most of the deformation monitoring of foundation settlement, displacement and overall inclination of ground facilities such as dams, mines, oil fields, bridges, expressways and high-speed railway foundations in China are based on traditional non-digital equipment (such as theodolite, total station, etc.) ) to carry out periodic repeated measurement technology, generally requires a dedicated person, requires more human resources, data processing is difficult, and there is a problem of untimely monitoring, especially in the strong wind and heavy rain where deformation monitoring is strongly required. Work cannot be carried out, resulting in Seriously monitor the shorting period.

There are solutions and application cases of deformation monitoring and monitoring systems based on GPS (Global Positioning System) technology at home and abroad, but because GPS is a satellite navigation system controlled by the US Department of Defense, its timing accuracy and reliability are subject to US GPS policies. Therefore, its timing and positioning accuracy have potential unsafe factors.

my country's Beidou satellite navigation and positioning system is a regional active three-dimensional satellite positioning and communication system independently developed by China. It is the third relatively mature satellite navigation system after the US GPS and Russia's GLONASS (Global Satellite Navigation System). . The system works at a frequency of 2491.75MHz, and can provide users with all-weather, high-precision, regional real-time positioning services. The positioning accuracy can reach tens of nanoseconds, and its accuracy is comparable to that of GPS. In addition, when using GPS positioning technology for monitoring, the monitoring data needs to be stored in a special removable storage device, or additional wireless communication equipment needs to be used for transmission, which greatly increases the monitoring cost. The Beidou navigation satellite independently developed by my country has the functions of precise positioning and two-way communication. After receiving the positioning data at the ground monitoring point, the calculation software can calculate the displacement and deformation data with millimeter precision, and the result can be back-propagated as the communication content. To the satellite, and then transmitted to the designated user data processing center by the satellite. Therefore, it is not affected by the transmission distance and weather conditions, without additional manual intervention and transmission equipment, and can realize long-term, long-distance, all-weather real-time status monitoring.

Contents of the invention

The technical problem to be solved by the present invention is a CNSS (Beidou Satellite Navigation System)-based ground system that can monitor the displacement and deformation of ground facilities on a large scale for a long time and can improve the accuracy, reliability and safety of monitoring. Long-term monitoring system and method for facility deformation.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A CNSS-based long-term monitoring system for ground facility deformation, including a positioning monitoring module, CNSS, a data processing module and a client terminal; the positioning monitoring module includes CNSS terminals respectively located at each reference point and corresponding to each reference point The CNSS terminal of each monitoring point; The data processing module includes a CNSS terminal and a data processor; The client terminal includes a CNSS terminal and a display device; The CNSS and the CNSS terminal of the reference point and the monitoring point The CNSS terminal machine of each reference point is bidirectionally connected, and is respectively unidirectionally connected with the data processing module and the client terminal; the CNSS terminal machine of each reference point and the CNSS terminal machine of each monitoring point are connected unidirectionally with the data processor of the described data processing module .

A long-term monitoring method based on CNSS ground facility deformation utilizing above-mentioned monitoring system, comprises the following steps:

A. Establish a CNSS-based long-term monitoring system for ground facility deformation;

B. The monitoring points and reference points receive positioning information:

The CNSS terminal of the reference point and the CNSS terminal of the monitoring point obtain the location information of the location from the CNSS, and the location information includes the three-dimensional coordinate data of the reference point and the monitoring point; the CNSS terminal of the reference point and The CNSS terminal machine of monitoring point sends respective location information to described data processing module;

C, the positioning information of the data processing module processing monitoring points and reference points:

The precise coordinate values of each datum point are stored in advance in the described data processing module; After the described data processing module receives the location information from each datum point and each monitoring point, it is stored, and the respective datum points and each monitoring point are periodically checked. The time series of three-dimensional coordinate data formed by the three-dimensional coordinate data is processed, and the processing steps are as follows:

(1) Use the known precise coordinate values of each reference point to form a known precise coordinate value time series that matches the time series of the three-dimensional coordinate data of this reference point, and combine the time series of three-dimensional coordinate data of each reference point with its known accurate coordinate value. Get the difference time series of the reference point by making a difference between the coordinate value time series, and calculate the rate of change of the difference time series;

(2) Use the difference between the time series of the three-dimensional coordinate data of each monitoring point corresponding to the reference point and the difference time series of this reference point, and perform error correction on the time series of three-dimensional coordinate data of each monitoring point to obtain each monitoring point Corrected 3D coordinate data time series of points;

(3) Filtering and denoising the time series of difference values of each reference point and the rate of change thereof, and the time series of corrected three-dimensional coordinate data of each monitoring point;

(4) Process the time series of the corrected three-dimensional coordinate data of the filtered monitoring point and the difference time series and the rate of change of the reference point corresponding to the monitoring point, and calculate the relationship between the monitoring point and its corresponding The amount of deformation of the datum point;

D, the data processing module generates an early warning signal and sends:

The three-dimensional coordinate data time series of each reference point and the corrected three-dimensional coordinate data time series of each monitoring point are stored in the data processing module as monitoring data, and are sent to the Beidou satellite by the CNSS terminal of the data processing module; In the data processing module, there are preset safety thresholds of the deformation amount and the change rate of the reference point difference time series in the previous step in advance; when the change rate of the deformation amount and the difference value is within the preset safety threshold range When within, carry out following E step; Otherwise, described data processing module produces early warning signal and this early warning signal is sent to Beidou satellite by the CNSS terminal machine of described data processing module; Said Beidou satellite will come from data processing module The monitoring data and early warning signals are sent to the CNSS terminal of the client terminal and displayed through the display device, and the following step E is performed;

E, the data processing module generates prediction information and sends:

The data processing module predicts the displacement and deformation trend information of each monitoring point relative to the reference point according to the three-dimensional coordinate data time series of each reference point stored inside it and the corrected three-dimensional coordinate data time series of each monitoring point corresponding thereto, and Send this information to the Beidou satellite through the CNSS terminal of the data processing module, and the Beidou satellite then sends this information to the CNSS terminal of the client terminal and displays it through the display device.

The number of said reference points is 2-3, and the number of monitoring points corresponding to each reference point is more than 1.

The model of the CNSS terminal of the reference point or monitoring point, the CNSS terminal of the data processing module and the CNSS terminal of the client terminal is HMWJ/BD4.

The data is transmitted between the reference point and the monitoring point and the data processing module by means of wireless communication, cable communication and the like.

The technical progress obtained by adopting the above technical scheme is as follows:

The working mode of the monitoring system of the present invention is continuous, not only can regularly collect the deformation of the monitoring object, but also can carry out large-scale, long-term, all-weather uninterrupted real-time monitoring of various deformations of the monitoring object, which can be more It is convenient and fast to understand the deformation of the monitoring object, so that the monitoring personnel can analyze the various deformations of the monitoring object in time, and it is convenient to grasp the abnormal changes of the monitoring object in time; and the system is not affected and limited by distance, weather conditions and geographical environment, and There is no need for additional manual intervention and transmission equipment, the cost is greatly reduced, and it is convenient for maintenance and promotion.

The monitoring method of the present invention can process the data obtained by the monitoring system in real time, improves the monitoring accuracy of the deformation of the monitoring object, and introduces an early warning signal; the method can also predict abnormal changes such as the deformation trend and deformation speed of the monitoring object , so that monitors can predict and deal with abnormal changes in advance, and provide a basis for future optimal design.

During the monitoring process, the position and quantity of the reference point and monitoring point can be adjusted according to the actual situation, and segmental measurement can also be carried out, and the measurement effect and accuracy will not be affected.

The monitoring system of the present invention utilizes the Beidou satellite navigation system developed by my country to make information transmission safer, and is also conducive to the security and confidentiality of domestic information, effectively breaking away from the limitations of foreign technologies; and the monitoring method of the present invention can monitor the accuracy of the monitoring object High, large space for secondary development, strong scalability and wide application range.

Description of drawings

Fig. 1 is a schematic diagram of the structure and composition of the present invention.

Detailed ways

As shown in Figure 1, it can be seen that the CNSS-based long-term monitoring system for ground facility deformation includes a positioning monitoring module, CNSS (Beidou Satellite Navigation System), a data processing module, and a client terminal; The CNSS terminal machine of CNSS terminal machine and the CNSS terminal machine of each monitoring point corresponding with each datum point; Described data processing module comprises CNSS terminal machine and data processor; Described client terminal machine comprises CNSS terminal machine and display device; Described CNSS and The CNSS terminal of the reference point and the CNSS terminal of the monitoring point are bidirectionally connected, and are respectively unidirectionally connected with the data processing module and the client terminal; the CNSS terminal of each reference point and the CNSS terminal of each monitoring point are connected with the CNSS terminal of each monitoring point The data processor of the data processing module is connected in one direction.

Utilize the monitoring method of above-mentioned monitoring system, comprise the following steps:

A. Establish a CNSS-based long-term monitoring system for ground facility deformation:

The reference point of the monitoring system is arranged in an area where the ground facilities (that is, the main monitoring target) are located in very stable geological conditions, and there are no serious ground subsidence and other factors affecting the stability of the reference point nearby. In the easily deformable area above or nearby, the layout density of monitoring points can be moderately adjusted according to the geological conditions, geographical conditions and degree of deformation. Two or more reference points should be selected in areas that are close to the monitoring target to ensure monitoring It has good observation accuracy. The number of reference points is usually 2-3 (determined according to actual conditions, more can be set), and the number of monitoring points corresponding to each reference point is more than 1.

B. The monitoring points and reference points receive positioning information:

The CNSS terminal of the reference point and the CNSS terminal of the monitoring point obtain the location information of the point from the CNSS, and the location information includes the three-dimensional coordinate data of the reference point and the monitoring point; the CNSS terminal of the reference point and The CNSS terminals at the monitoring points send their respective positioning information to the processor of the data processing module; the monitoring points and reference points transmit data to the data processing system regularly after receiving the Beidou satellite positioning information, such as once per second . When each reference point and each monitoring point are very close to the distance from the data processing module, the CNSS terminal machine of each reference point and the CNSS terminal machine of each monitoring point and the data processing module can pass serial interface, parallel interface, The USB interface and some other communication ports are connected with the processor, and the serial port connection mode is commonly used. When the distance between each reference point and each monitoring point and the data processing module is not suitable for short-distance wired connection, wireless communication, cable communication, etc. can be used to transmit data between the reference point and monitoring point and the data processing module.

C, the positioning information of the data processing module processing monitoring points and reference points:

The precise coordinates of each reference point are stored in the data processing module in advance, and the known precise coordinates are obtained by manual measurement using existing precision instruments such as electronic levels; the data processing module receives data from each reference point. Store the positioning information of each monitoring point, and process the three-dimensional coordinate data time series formed by the three-dimensional coordinate data of each reference point and each monitoring point according to the cycle. The cycle can be 2 hours or 3 hours, depending on the actual situation. OK, the specific processing steps are as follows:

(1) Use the known precise coordinate values of each datum point to compose the time series of known precise coordinate values of datum points that match the time series of 3D coordinate data of this datum point, and combine the time series of 3D coordinate data of each datum point with The difference time series of the reference point is obtained by making a difference from the time series of the known precise coordinate values, and the rate of change of the time series of the difference is calculated; because the difference is a time series, the relationship between each data element in the time series can be calculated The trend of change, that is, the rate of change;

(2) Use the difference between the time series of the three-dimensional coordinate data of each monitoring point corresponding to the reference point and the difference time series of this reference point, and perform error correction on the time series of three-dimensional coordinate data of each monitoring point to obtain each monitoring point Corrected 3D coordinate data time series of points;

(3) Using mode decomposition method and wavelet technology (or other algorithms) to filter and denoise the difference time series of each reference point and its change rate and the corrected three-dimensional coordinate data time series of each monitoring point;

(4) Use the Coleshky decomposition method to process the time series of the corrected three-dimensional coordinate data of the filtered monitoring point and the difference time series and the rate of change of the reference point corresponding to the monitoring point, establish the ambiguity search space and solve For the carrier phase integer ambiguity, the deformation amount of the monitoring point relative to the corresponding reference point is calculated according to the initial ambiguity information of the carrier phase observation value.

The data processor of the data processing module is unidirectionally connected to the CNSS terminal, and the two can also communicate through a serial interface, a parallel interface, a USB interface and some other communication ports, generally using a serial port connection. The data processor receives the positioning information from each reference point and each monitoring point, and uses data processing software to process the data according to a certain cycle; the model and configuration of the data processor vary according to the monitored objects, but the basic requirements are as follows: Pentium 4 or higher processor, main frequency 2GHz or above, 1G memory or above, 500G hard disk above, UNIX system supporting X-Windows; the data processing software uses professional data processing software GAMIT/GLOBK, which can perform two secondary development. The data processor sends the processed data to the CNSS terminal of the data processing module.

D, the data processing module generates an early warning signal and sends:

The three-dimensional coordinate data time series of each reference point and the corrected three-dimensional coordinate data time series of each monitoring point are stored in the data processing module as monitoring data, and are sent to the Beidou satellite by the CNSS terminal of the data processing module; In the above data processing module, there is a preset safety threshold of the rate of change of the difference time series between the amount of deformation and the reference point in the previous step; when the rate of change of the amount of deformation and the difference is within the preset safety threshold When within the range, perform the following E step; Otherwise, the data processing module generates an early warning signal and this early warning signal is sent to the Beidou satellite by the CNSS terminal of the data processing module; the Beidou satellite will come from the data processing module The monitoring data and early warning signals are sent to the CNSS terminal of the client terminal and displayed on the display device, and the following step E is performed.

E, the data processing module generates prediction information and sends:

The data processing module uses neural network algorithm (other intelligent algorithms can also be used) to predict deformation trend information according to the time series of three-dimensional coordinate data of each reference point stored inside it and the time series of corrected three-dimensional coordinate data of each monitoring point corresponding to it. , predict the displacement and deformation trend information of each monitoring point relative to this reference point, and send this information to the Beidou satellite through the CNSS terminal of the data processing module, and the Beidou satellite sends this information to the CNSS terminal of the client terminal and displayed on a display device.

The CNSS terminal of the client terminal is unidirectionally connected to the display device, and the two can also communicate through a serial interface, a parallel interface, a USB interface and some other communication ports, generally using a serial port connection.

After the client terminal receives the monitoring data, early warning signals and prediction information transmitted by the Beidou satellite and from the data processing module through the CNSS terminal, it displays the three-dimensional coordinates, displacement and deformation of each reference point and monitoring point in real time through the display device , to realize the visual management and data analysis of the monitoring object information. In this way, unattended all-weather and high-precision long-term monitoring can be performed on the quasi-static displacement and deformation of ground facilities.

The model of the CNSS terminal of the reference point or monitoring point, the CNSS terminal of the data processing module and the CNSS terminal of the client terminal is HMWJ/BD4. Other types of terminals can also be used as required.

This specification gives a preferred organizational structure, and in actual application, a more practical structure can be adopted according to the actual situation. But as long as it conforms to the basic idea of the method, it all belongs to the protection scope of the present invention.

Claims (5)

1. the long term monitoring system based on the surface facility distortion of CNSS is characterized in that comprising position monitor module, CNSS, data processing module and client terminal; Said position monitor module comprise the CNSS terminating machine of being located at each reference point respectively and with the CNSS terminating machine of each corresponding each monitoring point of reference point; Said data processing module comprises CNSS terminating machine and data processor; Said client terminal comprises CNSS terminating machine and display device; Said CNSS and the CNSS terminating machine of said reference point and two-way connection of CNSS terminating machine of monitoring point, and with said data processing module and client terminal unidirectional connection respectively; The CNSS terminating machine of each reference point and the CNSS terminating machine of each monitoring point are connected with the data processor of said data processing module is unidirectional.

2. long term monitoring methods based on the distortion of the surface facility of CNSS that utilizes claim 1 is characterized in that may further comprise the steps:

A, set up long term monitoring system based on the surface facility distortion of CNSS;

B, said monitoring point and reference point receive locating information:

The CNSS terminating machine of said reference point and the CNSS terminating machine of monitoring point obtain the locating information of position from CNSS, and said locating information comprises the three-dimensional coordinate data of said reference point and monitoring point; The CNSS terminating machine of said reference point and the CNSS terminating machine of monitoring point send to said data processing module with locating information separately;

C, said data processing module are handled the locating information of monitoring point and reference point:

The accurate coordinates value that has each reference point in the said data processing module in advance; Said data processing module is stored after receiving the locating information from each reference point and each monitoring point, by the cycle each reference point and the three-dimensional coordinate data time series that each monitoring point three-dimensional coordinate data separately forms is handled, and treatment step is following:

(1) forms the suitable known accurate coordinates value time series of three-dimensional coordinate data time series of reference point therewith with the known accurate coordinates value of each reference point; Three-dimensional coordinate data time series accurate coordinates value known with it time series of each reference point is made the differential time sequence that difference obtains this reference point, and obtain the rate of change of this differential time sequence;

(2) use with the three-dimensional coordinate data time series of corresponding each monitoring point of said reference point therewith the differential time sequence of reference point do poor; Three-dimensional coordinate data time series to each monitoring point is carried out error correction, obtains the correction three-dimensional coordinate data time series of each monitoring point;

(3) the differential time sequence of said each reference point and the correction three-dimensional coordinate data time series of rate of change and each monitoring point thereof are carried out filtering and noise reduction;

(4) to the correction three-dimensional coordinate data time series of filtered monitoring point and therewith the differential time sequence and the rate of change thereof of the corresponding reference point in monitoring point handle, calculate the deflection of said monitoring point with respect to reference point corresponding with it;

D, said data processing module produce early warning signal and send:

The three-dimensional coordinate data time series of each reference point and the correction three-dimensional coordinate data time series of each monitoring point are stored in the said data processing module as Monitoring Data, and send to big-dipper satellite through the CNSS terminating machine of said data processing module; The preset secure threshold that has the rate of change of going up deflection described in the step and said reference point differential time sequence in the said data processing module in advance; When the rate of change of said deflection and difference exceeded preset secure threshold, said data processing module produced early warning signal and the CNSS terminating machine of this early warning signal through said data processing module is sent to big-dipper satellite; The CNSS terminating machine that said big-dipper satellite will be sent to client terminal from the Monitoring Data and the early warning signal of data processing module also passes through the display device demonstration;

E, said data processing module produce information of forecasting and send:

Said data processing module goes out the displacement deformation tendency information of each monitoring point with respect to this reference point according to the correction three-dimensional coordinate data time series forecasting of the three-dimensional coordinate data time series of each reference point of its storage inside and each monitoring point corresponding with it; And the CNSS terminating machine of this information through data processing module sent to big-dipper satellite, big-dipper satellite is sent to the CNSS terminating machine of said client terminal with this information again and shows through display device.

3. the long term monitoring methods of the surface facility distortion based on CNSS according to claim 2, the quantity that it is characterized in that said reference point is 2-3, with the quantity of each corresponding monitoring point of reference point be more than 1.

4. the long term monitoring methods of the surface facility distortion based on CNSS according to claim 2 is characterized in that the model of CNSS terminating machine of CNSS terminating machine and the said client terminal of the CNSS terminating machine of said reference point or monitoring point, said data processing module is HMWJ/BD4.

5. the long term monitoring methods that is out of shape based on the surface facility of CNSS according to claim 2 is characterized in that adopting between said reference point and monitoring point and the data processing module radio communication or cable communication mode to transmit data.