CN116524142A - River and lake change data three-dimensional reconstruction method and system based on digital twinning - Google Patents
River and lake change data three-dimensional reconstruction method and system based on digital twinning Download PDFInfo
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Abstract
The invention discloses a three-dimensional reconstruction method and a three-dimensional reconstruction system for river and lake change data based on digital twinning, which relate to the technical field of river and lake water conservancy monitoring and comprise the following steps: the system comprises a river and lake information database, a point location setting module, a data acquisition module and a reconstruction comparison module, wherein a river and lake map is stored in the river and lake information database; the point location setting module comprises a contour analysis unit and a point location setting unit, wherein the contour analysis unit is used for establishing a river and lake contour based on a river and lake map, and analyzing the river and lake contour to obtain a monitoring point location; the point position setting unit is used for setting a point position reference object on the monitoring point position; according to the method, by analyzing the outlines of the rivers and the lakes, different monitoring points can be defined, the monitoring is carried out on the appointed monitoring points, and the accuracy of monitoring the change data of the rivers and the lakes can be improved, so that the problems that monitoring key points are lacked in the existing monitoring process of the rivers and the lakes, and the monitoring accuracy and the monitoring efficiency are low are solved.
Description
Technical Field
The invention relates to the technical field of river and lake water conservancy monitoring, in particular to a three-dimensional reconstruction method and system for river and lake change data based on digital twinning.
Background
In the urban water conservancy treatment process, rivers and lakes are an important ring in hydraulic engineering, on one hand, water resources can be provided for urban water conservancy, and on the other hand, a discharge channel can be provided for urban water discharge, so that the change of water conservancy data of the rivers and the lakes needs to be monitored and updated.
In the prior art, in the process of monitoring river and lake data, the data of the river and the lake are monitored by adopting a mode of manual on-site data acquisition, unmanned aerial vehicle data acquisition or satellite data acquisition, but the profile change of the river and the lake in a certain time is very small, and the monitoring mode is adopted to monitor the river and the lake, so that the problems of lack of key points and serious waste of monitoring resources are caused in the monitoring process, and therefore, a method capable of accurately monitoring the change data of the river and the lake is needed to solve the problems.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the prior art to a certain extent, different monitoring points can be defined by analyzing the outlines of the rivers and the lakes, monitoring can be carried out on the appointed monitoring points, and the accuracy of monitoring the change data of the rivers and the lakes can be improved, so that the problems of lack of monitoring key points, low monitoring accuracy and low monitoring efficiency in the existing monitoring process of the rivers and the lakes are solved.
To achieve the above object, in a first aspect, the present invention provides a digital twin-based three-dimensional reconstruction system for river and lake change data, comprising: the system comprises a river and lake information database, a point location setting module, a data acquisition module and a reconstruction comparison module, wherein a river and lake map is stored in the river and lake information database; the point location setting module comprises a contour analysis unit and a point location setting unit, wherein the contour analysis unit is used for establishing a river and lake contour based on a river and lake map, and analyzing the river and lake contour to obtain a monitoring point location; the point position setting unit is used for setting a point position reference object on the monitoring point position;
the data acquisition module is used for defining a monitoring area based on the monitoring points and acquiring river bed data of the river and the lake in the monitoring area;
the reconstruction comparison module comprises a model building unit and a comparison updating unit, wherein the model building unit is used for building a river and lake twin model based on the contour of the river and lake, and the comparison updating unit is used for comparing the river bed data of the river and lake obtained each time with the river and lake twin model to obtain a comparison result and updating the river and lake twin model according to the comparison result.
Further, the contour analysis unit is configured with a contour analysis strategy comprising: extracting a river and lake outline from a river and lake map;
extracting a river profile and a lake profile from the river-lake profile, and setting the joint of the river profile and the lake profile as a river-lake access line;
and two ends of the river and lake access line are respectively provided with a monitoring river and lake connection point.
Further, the contour analysis strategy further comprises: respectively setting two edges in the length direction in the river profile as river bank profile lines;
setting two ends of the river bank contour line as a river starting point and a river ending point respectively, wherein the river starting point is positioned at one side of the river bank contour line facing the opposite direction of the water flow direction of the river, and the river ending point is positioned at one side of the river bank contour line facing the water flow direction of the river;
setting a reference point at each interval of a first selected distance by taking a river starting point as a first reference point, starting to connect the reference points corresponding to two river bank contour lines with the river starting point to obtain a reference transverse line, acquiring the midpoint of the reference transverse line to be set as a transverse line point, setting the connecting line of two adjacent transverse line points as a local water flow line, setting one end of the local water flow line in the reverse direction of the water flow direction of the river as a local water flow starting point, and setting one end of the local water flow line in the water flow direction of the river as a local water flow end point;
making a tangent line of the river bank contour line by passing the reference point, and setting the tangent line as a reference tangent line;
setting a part of the reference tangent line, which is positioned near the river end point, as a reference ray, and setting the reference point as the vertex of the reference ray;
setting a reference point corresponding to a current reference ray as a current reference point, setting a reference point in the reverse direction of the current reference point towards the water flow direction of the river as a previous group of reference points, setting a local water flow line between the current reference point and the previous group of reference points as a comparison water flow line, enabling the vertex of the current reference ray to coincide with the local water flow starting point of the comparison water flow line, and setting the included angle between the current reference ray and the comparison water flow line as a reference included angle;
when the reference included angle is larger than or equal to the first angle threshold value, the reference included angle is set as a monitoring included angle, and the current reference point position corresponding to the monitoring included angle is set as a monitoring river point position, wherein the monitoring point position comprises a monitoring river-lake connection point position and a monitoring river point position.
Further, the point location setting unit is configured with a point location setting policy, the point location setting policy including: setting a monitoring included angle as an impact included angle when the reference ray faces the inside of the river profile, and setting a stacking included angle when the reference ray faces the outside of the river profile;
setting the monitored river point corresponding to the impact included angle as an impact river point, and setting the monitored river point corresponding to the stacking included angle as a stacking river point; the river point monitoring method comprises the steps of monitoring river points, namely an impact river point and a pile-up river point;
an impact reference is set at the impact river point, a pile reference is set at the pile river point, and a connection reference is set at the monitoring river and lake connection point.
Further, the data acquisition module is configured with a data acquisition strategy comprising: obtaining a reference ray corresponding to an impact reference object, making a vertical line with the vertex of the reference ray corresponding to the impact reference object, setting the vertical line as an impact reference vertical line, setting a part of the impact reference vertical line facing the outside of the river profile as an impact acquisition line, setting a first impact acquisition number of impact acquisition points on the impact acquisition line with the vertex of the reference ray corresponding to the impact reference object as a starting point, separating a first acquisition distance from a distance between every two impact acquisition points, and setting river bed data obtained by the impact acquisition points as an impact reference river bed depth;
obtaining reference rays corresponding to a pile-up reference object, making a vertical line through the vertexes of the reference rays corresponding to the pile-up reference object, setting the vertical line as a pile-up reference line, setting a part of the pile-up reference line facing the interior of the river profile as a pile-up acquisition line, setting a first pile-up acquisition number of pile-up acquisition points on the pile-up acquisition line with the vertexes of the reference rays corresponding to the pile-up reference object as a starting point, separating the distance between every two pile-up acquisition points by a first acquisition distance, and setting the river bed data obtained by the pile-up acquisition points as pile-up reference river bed depth;
the method comprises the steps of setting a first connection number of connection internal collection points between two monitoring river and lake connection points, setting the river bed data acquired by the connection internal collection points to be the depth of the connection internal river bed, setting a second connection number of connection external collection points on extension lines which are positioned on both sides of the two monitoring river and lake connection points and on river and lake access lines respectively, and setting the river bed data acquired by the connection external collection points to be the depth of the connection external river bed.
Further, the model establishing unit is configured with a model establishing policy including: and marking the impact reference object, the accumulation reference object and the positions of the connection reference objects on the contour of the river and the lake to obtain the river and the lake twin model.
Further, the comparison updating unit is configured with a comparison updating policy, and the comparison updating policy includes: obtaining an average value of a plurality of obtained impact reference riverbed depths to obtain an impact average riverbed depth, marking an impact river point where an impact reference object is positioned as an impact erosion point when the impact average riverbed depth is larger than a first impact riverbed depth threshold value, and re-obtaining river profiles between the reference points at two sides of the impact erosion point to obtain an impact erosion profile;
obtaining an average value of a plurality of obtained accumulation reference riverbed depths to obtain an accumulation average riverbed depth, marking an accumulation river point position where an accumulation reference object is located as an accumulation expansion point position when the accumulation average riverbed depth is smaller than a first accumulation riverbed depth threshold value, and re-obtaining river profiles between reference points at two sides of the accumulation expansion point position to obtain an accumulation expansion profile;
obtaining an average value of the obtained connecting internal riverbed depths to obtain an internal average riverbed depth, and setting the monitoring riverbed connecting point positions corresponding to the connecting reference objects as connecting shrinkage point positions when the internal average riverbed depth is smaller than a first internal riverbed depth threshold value; obtaining an average value of the obtained external river bed depth to obtain external average river bed depth, and setting the monitoring river and lake connection point positions corresponding to the connection reference objects as connection expansion point positions when the external average river bed depth is larger than a first external river bed depth threshold value; when two monitored river and lake points are connected with reduced points or connected with extended points, acquiring a river and lake access line again to obtain a river and lake access update line;
updating the impact erosion profile into a river and lake twin model according to the position correspondence of the impact reference object, updating the accumulation extension profile into the river and lake twin model according to the position correspondence of the accumulation reference object, and updating the river and lake access update line into the river and lake twin model according to the position correspondence of the connection reference object, wherein the comparison result comprises the impact erosion profile, the accumulation extension profile and the river and lake access update line.
In a second aspect, the invention also provides a three-dimensional reconstruction method of river and lake change data based on digital twinning, which comprises the following steps: acquiring a river and lake map from a river and lake information database;
establishing a river and lake contour based on a river and lake map, and analyzing the river and lake contour to obtain monitoring points;
setting a point position reference object on the monitoring point position;
defining a monitoring area based on the monitoring points, and acquiring river bed data of the river and the lake in the monitoring area;
and establishing a river and lake twin model based on the contour of the river and lake, comparing the river bed data of the river and lake obtained each time with the river and lake twin model to obtain a comparison result, and updating the river and lake twin model according to the comparison result.
The invention has the beneficial effects that: according to the method, the river and lake map is obtained from the river and lake information database, the river and lake profile is built based on the river and lake map, the river and lake profile is analyzed to obtain the monitoring points, the monitoring points can be arranged at the junction of the river and the lake and at the position where the river may have impact and accumulation, the accuracy of data monitoring is improved, the resource waste condition in the monitoring process is reduced, and the efficiency of monitoring the river and lake change data is improved;
according to the invention, the point position reference object is arranged on the monitoring point position, so that a basic reference standard can be established through the point position reference object, no matter how the river and lake information changes, the position of the point position reference object is relatively fixed, and the accuracy of the data comparison process is improved;
according to the invention, the monitoring area is defined based on the monitoring points, the river-lake riverbed data of the river and the lake is obtained in the monitoring area, the river-lake twin model is built based on the river-lake outline, the river-lake riverbed data obtained each time is compared with the river-lake twin model, the comparison result is obtained, the river-lake twin model is updated according to the comparison result, and the design can be used for timely updating the data when the river-lake data changes.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a flow chart of the steps of the method of the present invention;
FIG. 2 is a schematic block diagram of the system of the present invention;
fig. 3 is a partially divided schematic view of the river profile of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 2, the present invention provides a three-dimensional reconstruction system for river and lake change data based on digital twinning, which can define different monitoring points by analyzing the contour of the river and lake, monitor the designated monitoring points, and improve the accuracy of monitoring the river and lake change data; specifically, the three-dimensional reconstruction system of river and lake change data based on digital twin comprises: the system comprises a river and lake information database, a point position setting module, a data acquisition module and a reconstruction comparison module, wherein a river and lake map is stored in the river and lake information database; the point location setting module comprises a contour analysis unit and a point location setting unit, wherein the contour analysis unit is used for establishing a river and lake contour based on a river and lake map and analyzing the river and lake contour to obtain a monitoring point location; the contour analysis unit is configured with a contour analysis strategy, as shown in fig. 3, the contour analysis strategy includes: extracting a river and lake outline from a river and lake map;
extracting a river profile and a lake profile from the river-lake profile, and setting the joint of the river profile and the lake profile as a river-lake access line;
the two ends of the river and lake access line are respectively provided with a monitoring river and lake connection point, when the river and lake access line is contracted or expanded, the water inflow and outflow amount at the river and lake connection position can change, and at the moment, no matter drainage or drought prevention and water supplementing can be influenced to a certain extent, therefore, the monitoring of the river and lake access line is very important, and the change condition of the river and lake access opening can be obtained by monitoring the change condition of the river bed of the monitoring river and lake connection point at the two ends of the river and lake access line.
The contour analysis strategy further comprises: respectively setting two sides in the length direction in the river profile as river bank profile lines, wherein the length direction is the flow direction of the river, and the positions of the two sides of the river corresponding to the river bank profile lines;
setting two ends of a river bank contour line as a river starting point and a river ending point respectively, wherein the river starting point is positioned at one side of the river bank contour line facing the opposite direction of the water flow direction of the river, the river ending point is positioned at one side of the river bank contour line facing the water flow direction of the river, the river starting point and the river ending point are based on the river part in the monitored area, the river real starting point and the river ending point are not represented, and the river starting point and the river ending point in the monitored area are obtained;
setting a reference point at each interval of a first selection distance by taking a river starting point as a first reference point, setting the first selection distance as 5m, starting to connect the reference points corresponding to two river bank contour lines with the river starting point to obtain a reference transverse line, acquiring a midpoint of the reference transverse line to be set as a transverse line point, setting a connecting line of two adjacent transverse line points as a local water flow line, setting one end of the local water flow line in the reverse direction of the water flow direction of the river as a local water flow starting point, and setting one end of the local water flow line in the water flow direction of the river as a local water flow end point;
making a tangent line of the river bank contour line by passing the reference point, and setting the tangent line as a reference tangent line;
setting a part of the reference tangent line, which is positioned near the river end point, as a reference ray, and setting the reference point as the vertex of the reference ray;
setting a reference point corresponding to a current reference ray as a current reference point, setting a reference point in the reverse direction of the current reference point towards the water flow direction of the river as a previous group of reference points, setting a local water flow line between the current reference point and the previous group of reference points as a comparison water flow line, enabling the vertex of the current reference ray to coincide with the local water flow starting point of the comparison water flow line, and setting the included angle between the current reference ray and the comparison water flow line as a reference included angle;
when the reference included angle is larger than or equal to a first angle threshold value, setting the reference included angle as a monitoring included angle, and setting a current reference point corresponding to the monitoring included angle as a monitoring river point, wherein the monitoring point comprises a monitoring river-lake connection point and a monitoring river point, under the limit condition, if a river is in a straight state, the reference ray can coincide with a river bank contour line, the reference included angle is 0, if a river is locally bent, a certain included angle exists between the reference ray and the river bank contour line, and the first angle threshold value is set to 45 degrees;
the point position setting unit is used for setting a point position reference object on the monitoring point position; the point location setting unit is configured with a point location setting strategy, and the point location setting strategy comprises: setting a monitoring included angle as an impact included angle when the reference ray faces the inside of the river profile, and setting a stacking included angle when the reference ray faces the outside of the river profile; if the reference ray is directed to the interior of the river profile, the river bank profile is bent towards the interior of the river profile, and the river can wash the position; when the reference rays face the outside of the river profile, the reference rays indicate that the river bank profile is bent towards the outside of the river profile, and the position is less impacted at the moment, so that sediment accumulation can be generated;
setting the monitored river point corresponding to the impact included angle as an impact river point, and setting the monitored river point corresponding to the stacking included angle as a stacking river point; the river point monitoring method comprises the steps of monitoring river points, namely an impact river point and a pile-up river point;
an impact reference is set at the impact river point, a pile reference is set at the pile river point, and a connection reference is set at the monitoring river and lake connection point. The point location reference objects comprise impact reference objects, stacking reference objects and connecting reference objects, when the point location reference objects are specifically arranged, the point location reference objects can be wood piles which are driven on the river bank, the heights of the wood piles are kept consistent within a certain time period, and the point location reference objects can be well used as reference objects;
the data acquisition module is used for defining a monitoring area based on the monitoring points and acquiring river bed data of the river and the lake in the monitoring area; the data acquisition module is configured with a data acquisition strategy comprising: obtaining a reference ray corresponding to an impact reference object, making a vertical line with the vertex of the reference ray corresponding to the impact reference object, setting the vertical line as an impact reference vertical line, setting the part of the impact reference vertical line facing the outside of the river profile as an impact acquisition line, setting a first impact acquisition number of impact acquisition points on the impact acquisition line by taking the vertex of the reference ray corresponding to the impact reference object as a starting point, setting the first impact acquisition number as 3, setting the distance between every two impact acquisition points to be a first acquisition distance, setting the first acquisition distance as 50cm, setting the river bed data obtained by the impact acquisition points as an impact reference river bed depth, and detecting by an ultrasonic detection device with the height of a wood pile of the point reference object as a monitoring standard, wherein the detection is carried out at the same height in each monitoring;
obtaining reference rays corresponding to a pile-up reference object, making a vertical line through the vertex of the reference rays corresponding to the pile-up reference object, setting the vertical line as a pile-up reference vertical line, setting the part of the pile-up reference vertical line facing the inside of the river profile as a pile-up acquisition line, setting a first pile-up acquisition number of pile-up acquisition points on the pile-up acquisition line by taking the vertex of the reference rays corresponding to the pile-up reference object as a starting point, setting the first pile-up acquisition number as 3, separating the distance between every two pile-up acquisition points by a first acquisition distance, and setting the river bed data acquired by the pile-up acquisition points as pile-up reference river bed depth;
the method comprises the steps of setting a first connection number of connection internal acquisition points between two monitoring river and lake connection points, setting the first connection number to be 6, setting 3 connection internal acquisition points near each monitoring river and lake connection point, setting the distance between every two connection internal acquisition points to be a first acquisition distance, setting the riverbed data acquired by the connection internal acquisition points to be connection internal riverbed depth, setting a second connection number of connection external acquisition points on extension lines which are positioned on both sides of the two monitoring river and lake connection points and located river and lake access lines, setting the second connection number to be 3, setting the distance between every two external internal acquisition points to be the first acquisition distance, and setting the riverbed data acquired by the connection external acquisition points to be connection external riverbed depth.
The reconstruction comparison module comprises a model building unit and a comparison updating unit, wherein the model building unit is used for building a river and lake twin model based on the river and lake profile, the model building unit is configured with a model building strategy, and the model building strategy comprises: marking the positions of the impact reference object, the accumulation reference object and the connection reference object on the contour of the river and the lake to obtain a river and the lake twin model; the comparison updating unit is used for comparing the river bed data of the river and the lake obtained each time with the river and lake twin model to obtain a comparison result, and updating the river and lake twin model according to the comparison result; the comparison updating unit is configured with a comparison updating strategy, and the comparison updating strategy comprises: obtaining an average value of a plurality of obtained impact reference riverbed depths to obtain an impact average riverbed depth, setting a first impact riverbed depth threshold to be 1m when the impact average riverbed depth is larger than the first impact riverbed depth threshold, marking an impact river point where an impact reference object is located as an impact erosion point, and re-obtaining river profiles between the reference points at two sides of the impact erosion point to obtain an impact erosion profile;
obtaining an average value of a plurality of obtained accumulation reference riverbed depths to obtain an accumulation average riverbed depth, setting a first accumulation riverbed depth threshold to be 0.5m when the accumulation average riverbed depth is smaller than the first accumulation riverbed depth threshold, marking accumulation river points where accumulation references are located as accumulation expansion points, and re-obtaining river profiles between reference points on two sides of the accumulation expansion points to obtain accumulation expansion profiles;
obtaining an average value of the obtained internal river bed depths of the connection to obtain an internal average river bed depth, setting the first internal river bed depth threshold to be 0.5m when the internal average river bed depth is smaller than the first internal river bed depth threshold, and setting the monitoring river lake connection point positions corresponding to the connection reference objects as connection shrinkage point positions; obtaining an average value of the obtained external river bed depth to obtain external average river bed depth, setting a first external river bed depth threshold to be 1m when the external average river bed depth is larger than the first external river bed depth threshold, and setting a monitoring river and lake connection point corresponding to a connection reference object as a connection expansion point; when two monitored river and lake points are connected with reduced points or connected with extended points, acquiring a river and lake access line again to obtain a river and lake access update line;
updating the impact erosion profile into a river and lake twin model according to the position correspondence of the impact reference object, updating the accumulation extension profile into the river and lake twin model according to the position correspondence of the accumulation reference object, and updating the river and lake access update line into the river and lake twin model according to the position correspondence of the connection reference object, wherein the comparison result comprises the impact erosion profile, the accumulation extension profile and the river and lake access update line.
Referring to fig. 1, the present invention further provides a method for reconstructing a three-dimensional system of river and lake change data based on digital twinning, specifically, the method for reconstructing a three-dimensional system of river and lake change data based on digital twinning comprises the following steps: s10, acquiring a river and lake map from a river and lake information database;
step S20, a river and lake profile is established based on a river and lake map, and analysis is carried out on the river and lake profile to obtain monitoring points; step S20 further comprises the following sub-steps: step S2011, extracting a river and lake outline from a river and lake map;
step S2012, extracting a river profile and a lake profile from the river-lake profile, and setting the joint of the river profile and the lake profile as a river-lake access line;
and S2013, respectively arranging a monitoring river and lake connection point position at two ends of the river and lake access line.
Step S20 further comprises the following sub-steps: step S2021, respectively setting two sides in the length direction in the river profile as river bank profile lines;
step S2022, setting two ends of the river bank contour line as a river starting point and a river ending point respectively, wherein the river starting point is positioned at one side of the river bank contour line facing the opposite direction of the water flow direction of the river, and the river ending point is positioned at one side of the river bank contour line facing the water flow direction of the river;
step S2023, setting a reference point at each first selected distance with a river origin as a first reference point, starting to connect the reference points corresponding to the two river bank contour lines with the river origin to obtain a reference transverse line, obtaining a midpoint of the reference transverse line, setting a connecting line of two adjacent transverse line points as a transverse line point, setting one end of the local water line facing the opposite direction of the water flow direction of the river as a local water flow origin, and setting one end of the local water flow line facing the water flow direction of the river as a local water flow destination;
step S2024, making a tangent line of the river bank contour line by the reference point, and setting the tangent line as the reference tangent line;
step S2025, setting a portion of the reference tangent line located near the river end point at the reference point as the reference ray, and setting the reference point as the vertex of the reference ray;
step S2026, setting the reference point corresponding to the current reference ray as the current reference point, setting the reference point of the current reference point in the opposite direction to the water flow direction of the river as the previous group of reference points, setting the local water flow line between the current reference point and the previous group of reference points as the comparison water flow line, matching the vertex of the current reference ray with the local water flow starting point of the comparison water flow line, and setting the included angle between the current reference ray and the comparison water flow line as the reference included angle;
in step S2027, when the reference included angle is greater than or equal to the first angle threshold, the reference included angle is set as a monitoring included angle, and the current reference point corresponding to the monitoring included angle is set as a monitored river point, where the monitoring point includes a monitored river-lake connection point and a monitored river point.
Step S30, setting point position reference objects on the monitoring point positions; step S30 further comprises the sub-steps of: step S301, setting a monitoring included angle as an impact included angle when the reference ray faces the inside of the river profile, and setting a stacking included angle when the reference ray faces the outside of the river profile;
step S302, setting the monitored river point corresponding to the impact included angle as the impact river point, and setting the monitored river point corresponding to the stacking included angle as the stacking river point; the river point monitoring method comprises the steps of monitoring river points, namely an impact river point and a pile-up river point;
in step S303, an impact reference is set at the impact river point, a pile reference is set at the pile river point, and a connection reference is set at the monitoring river-lake connection point.
Step S40, a monitoring area is defined based on the monitoring points, and river bed data of the river and the lake are acquired in the monitoring area; step S40 further comprises the sub-steps of: step S401, obtaining a reference ray corresponding to an impact reference object, making a vertical line with the vertex of the reference ray corresponding to the impact reference object, setting the vertical line as an impact reference vertical line, setting the part of the impact reference vertical line facing the outside of the river profile as an impact acquisition line, setting a first impact acquisition number of impact acquisition points on the impact acquisition line with the vertex of the reference ray corresponding to the impact reference object as a starting point, separating the distance between every two impact acquisition points by a first acquisition distance, and setting the river bed data obtained by the impact acquisition points as an impact reference river bed depth;
step S402, obtaining reference rays corresponding to a pile-up reference object, making a vertical line through the vertexes of the reference rays corresponding to the pile-up reference object, setting the vertical line as a pile-up reference line, setting a part of the pile-up reference line facing the interior of a river profile as a pile-up acquisition line, setting a first pile-up acquisition number of pile-up acquisition points on the pile-up acquisition line with the vertexes of the reference rays corresponding to the pile-up reference object as a starting point, separating the distance between every two pile-up acquisition points by a first acquisition distance, and setting river bed data obtained by the pile-up acquisition points as pile-up reference river bed depth;
step S403, setting a first connection number of connection internal acquisition points between two monitoring river and lake connection points, setting the river bed data acquired by the connection internal acquisition points as connection internal river bed depth, setting a second connection number of connection external acquisition points on extension lines which are positioned on both sides of the two monitoring river and lake connection points and on river and lake access lines respectively, and setting the river bed data acquired by the connection external acquisition points as connection external river bed depth.
S50, establishing a river and lake twin model based on the contour of the river and lake, comparing the river bed data of the river and lake obtained each time with the river and lake twin model to obtain a comparison result, and updating the river and lake twin model according to the comparison result; step S50 further includes step S5011 of marking the positions of the impact references, the stacking references, and the connection references on the contour of the river and lake to obtain a model of the river and lake twinning.
Step S50 further comprises step S5021, wherein the average value of a plurality of obtained impact reference riverbed depths is calculated to obtain an impact average riverbed depth, when the impact average riverbed depth is larger than a first impact riverbed depth threshold value, an impact river point where an impact reference object is located is marked as an impact erosion point, and river profiles between the reference points on two sides of the impact erosion point are obtained again to obtain an impact erosion profile;
step S5022, obtaining an average value of a plurality of obtained accumulation reference riverbed depths to obtain an accumulation average riverbed depth, marking accumulation river points where accumulation references are located as accumulation expansion points when the accumulation average riverbed depth is smaller than a first accumulation riverbed depth threshold value, and re-obtaining river profiles between reference points at two sides of the accumulation expansion points to obtain accumulation expansion profiles;
step S5023, obtaining an average value of the obtained connecting internal riverbed depths to obtain an internal average riverbed depth, and setting the monitoring riverbed connecting points corresponding to the connecting reference object as connecting shrinkage points when the internal average riverbed depth is smaller than a first internal riverbed depth threshold value; obtaining an average value of the obtained external river bed depth to obtain external average river bed depth, and setting the monitoring river and lake connection point positions corresponding to the connection reference objects as connection expansion point positions when the external average river bed depth is larger than a first external river bed depth threshold value; when two monitored river and lake points are connected with reduced points or connected with extended points, acquiring a river and lake access line again to obtain a river and lake access update line;
step S5024, updating the impact erosion profile into a river and lake twin model according to the position correspondence of the impact reference object, updating the accumulation extension profile into the river and lake twin model according to the position correspondence of the accumulation reference object, and updating the river and lake access update line into the river and lake twin model according to the position correspondence of the connection reference object, wherein the comparison result comprises the impact erosion profile, the accumulation extension profile and the river and lake access update line.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein. The storage medium may be implemented by any type or combination of volatile or nonvolatile Memory devices, such as static random access Memory (Static Random Access Memory, SRAM), electrically erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), programmable Read-Only Memory (PROM), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
Claims (8)
1. A digital twinning-based river and lake change data three-dimensional reconstruction system, comprising: the system comprises a river and lake information database, a point location setting module, a data acquisition module and a reconstruction comparison module, wherein a river and lake map is stored in the river and lake information database; the point location setting module comprises a contour analysis unit and a point location setting unit, wherein the contour analysis unit is used for establishing a river and lake contour based on a river and lake map, and analyzing the river and lake contour to obtain a monitoring point location; the point position setting unit is used for setting a point position reference object on the monitoring point position;
the data acquisition module is used for defining a monitoring area based on the monitoring points and acquiring river bed data of the river and the lake in the monitoring area;
the reconstruction comparison module comprises a model building unit and a comparison updating unit, wherein the model building unit is used for building a river and lake twin model based on the contour of the river and lake, and the comparison updating unit is used for comparing the river bed data of the river and lake obtained each time with the river and lake twin model to obtain a comparison result and updating the river and lake twin model according to the comparison result.
2. The digital twinning-based river and lake change data three-dimensional reconstruction system of claim 1, wherein the contour analysis unit is configured with a contour analysis strategy comprising: extracting a river and lake outline from a river and lake map;
extracting a river profile and a lake profile from the river-lake profile, and setting the joint of the river profile and the lake profile as a river-lake access line;
and two ends of the river and lake access line are respectively provided with a monitoring river and lake connection point.
3. The digital twinning-based river and lake change data three-dimensional reconstruction system of claim 2, wherein the contour analysis strategy further comprises: respectively setting two edges in the length direction in the river profile as river bank profile lines;
setting two ends of the river bank contour line as a river starting point and a river ending point respectively, wherein the river starting point is positioned at one side of the river bank contour line facing the opposite direction of the water flow direction of the river, and the river ending point is positioned at one side of the river bank contour line facing the water flow direction of the river;
setting a reference point at each interval of a first selected distance by taking a river starting point as a first reference point, starting to connect the reference points corresponding to two river bank contour lines with the river starting point to obtain a reference transverse line, acquiring the midpoint of the reference transverse line to be set as a transverse line point, setting the connecting line of two adjacent transverse line points as a local water flow line, setting one end of the local water flow line in the reverse direction of the water flow direction of the river as a local water flow starting point, and setting one end of the local water flow line in the water flow direction of the river as a local water flow end point;
making a tangent line of the river bank contour line by passing the reference point, and setting the tangent line as a reference tangent line;
setting a part of the reference tangent line, which is positioned near the river end point, as a reference ray, and setting the reference point as the vertex of the reference ray;
setting a reference point corresponding to a current reference ray as a current reference point, setting a reference point in the reverse direction of the current reference point towards the water flow direction of the river as a previous group of reference points, setting a local water flow line between the current reference point and the previous group of reference points as a comparison water flow line, enabling the vertex of the current reference ray to coincide with the local water flow starting point of the comparison water flow line, and setting the included angle between the current reference ray and the comparison water flow line as a reference included angle;
when the reference included angle is larger than or equal to the first angle threshold value, the reference included angle is set as a monitoring included angle, and the current reference point position corresponding to the monitoring included angle is set as a monitoring river point position, wherein the monitoring point position comprises a monitoring river-lake connection point position and a monitoring river point position.
4. A digital twinning-based river and lake change data three-dimensional reconstruction system according to claim 3, wherein the point location setting unit is configured with a point location setting strategy comprising: setting a monitoring included angle as an impact included angle when the reference ray faces the inside of the river profile, and setting a stacking included angle when the reference ray faces the outside of the river profile;
setting the monitored river point corresponding to the impact included angle as an impact river point, and setting the monitored river point corresponding to the stacking included angle as a stacking river point; the river point monitoring method comprises the steps of monitoring river points, namely an impact river point and a pile-up river point;
an impact reference is set at the impact river point, a pile reference is set at the pile river point, and a connection reference is set at the monitoring river and lake connection point.
5. The digital twinning-based river and lake varying data three-dimensional reconstruction system of claim 4, wherein the data acquisition module is configured with a data acquisition strategy comprising: obtaining a reference ray corresponding to an impact reference object, making a vertical line with the vertex of the reference ray corresponding to the impact reference object, setting the vertical line as an impact reference vertical line, setting a part of the impact reference vertical line facing the outside of the river profile as an impact acquisition line, setting a first impact acquisition number of impact acquisition points on the impact acquisition line with the vertex of the reference ray corresponding to the impact reference object as a starting point, separating a first acquisition distance from a distance between every two impact acquisition points, and setting river bed data obtained by the impact acquisition points as an impact reference river bed depth;
obtaining reference rays corresponding to a pile-up reference object, making a vertical line through the vertexes of the reference rays corresponding to the pile-up reference object, setting the vertical line as a pile-up reference line, setting a part of the pile-up reference line facing the interior of the river profile as a pile-up acquisition line, setting a first pile-up acquisition number of pile-up acquisition points on the pile-up acquisition line with the vertexes of the reference rays corresponding to the pile-up reference object as a starting point, separating the distance between every two pile-up acquisition points by a first acquisition distance, and setting the river bed data obtained by the pile-up acquisition points as pile-up reference river bed depth;
the method comprises the steps of setting a first connection number of connection internal collection points between two monitoring river and lake connection points, setting the river bed data acquired by the connection internal collection points to be the depth of the connection internal river bed, setting a second connection number of connection external collection points on extension lines which are positioned on both sides of the two monitoring river and lake connection points and on river and lake access lines respectively, and setting the river bed data acquired by the connection external collection points to be the depth of the connection external river bed.
6. The digital twinning-based river and lake varying data three-dimensional reconstruction system of claim 5, wherein the model building unit is configured with a model building strategy comprising: and marking the impact reference object, the accumulation reference object and the positions of the connection reference objects on the contour of the river and the lake to obtain the river and the lake twin model.
7. The digital twinning-based river and lake change data three-dimensional reconstruction system of claim 6, wherein the alignment update unit is configured with an alignment update strategy comprising: obtaining an average value of a plurality of obtained impact reference riverbed depths to obtain an impact average riverbed depth, marking an impact river point where an impact reference object is positioned as an impact erosion point when the impact average riverbed depth is larger than a first impact riverbed depth threshold value, and re-obtaining river profiles between the reference points at two sides of the impact erosion point to obtain an impact erosion profile;
obtaining an average value of a plurality of obtained accumulation reference riverbed depths to obtain an accumulation average riverbed depth, marking an accumulation river point position where an accumulation reference object is located as an accumulation expansion point position when the accumulation average riverbed depth is smaller than a first accumulation riverbed depth threshold value, and re-obtaining river profiles between reference points at two sides of the accumulation expansion point position to obtain an accumulation expansion profile;
obtaining an average value of the obtained connecting internal riverbed depths to obtain an internal average riverbed depth, and setting the monitoring riverbed connecting point positions corresponding to the connecting reference objects as connecting shrinkage point positions when the internal average riverbed depth is smaller than a first internal riverbed depth threshold value; obtaining an average value of the obtained external river bed depth to obtain external average river bed depth, and setting the monitoring river and lake connection point positions corresponding to the connection reference objects as connection expansion point positions when the external average river bed depth is larger than a first external river bed depth threshold value; when two monitored river and lake points are connected with reduced points or connected with extended points, acquiring a river and lake access line again to obtain a river and lake access update line;
updating the impact erosion profile into a river and lake twin model according to the position correspondence of the impact reference object, updating the accumulation extension profile into the river and lake twin model according to the position correspondence of the accumulation reference object, and updating the river and lake access update line into the river and lake twin model according to the position correspondence of the connection reference object, wherein the comparison result comprises the impact erosion profile, the accumulation extension profile and the river and lake access update line.
8. A method for a digital twinning-based three-dimensional reconstruction system for river and lake change data according to any one of claims 1-7, comprising: acquiring a river and lake map from a river and lake information database;
establishing a river and lake contour based on a river and lake map, and analyzing the river and lake contour to obtain monitoring points;
setting a point position reference object on the monitoring point position;
defining a monitoring area based on the monitoring points, and acquiring river bed data of the river and the lake in the monitoring area;
and establishing a river and lake twin model based on the contour of the river and lake, comparing the river bed data of the river and lake obtained each time with the river and lake twin model to obtain a comparison result, and updating the river and lake twin model according to the comparison result.
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