CN113207102B - Large-area soft soil foundation treatment construction site monitoring system - Google Patents
Large-area soft soil foundation treatment construction site monitoring system Download PDFInfo
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- CN113207102B CN113207102B CN202110431492.XA CN202110431492A CN113207102B CN 113207102 B CN113207102 B CN 113207102B CN 202110431492 A CN202110431492 A CN 202110431492A CN 113207102 B CN113207102 B CN 113207102B
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Abstract
The invention relates to a large-area soft soil foundation treatment construction site monitoring system which comprises a monitoring center, a plurality of 5G base stations, a plurality of coordinators and a plurality of sensor nodes, wherein the monitoring center is in communication connection with the plurality of 5G base stations, the plurality of 5G base stations and the plurality of sensor nodes form a plurality of ZigBee subnetworks through the plurality of coordinators, the ZigBee subnetworks are formed based on the relative positions of the coordinators and the sensor nodes and the relative positions of the sensor nodes, each sensor node transmits monitored data to the coordinators in the same ZigBee subnetwork in real time according to a two-way data transmission algorithm, the coordinators and the 5G base stations are transmitted to the monitoring center, and the monitoring center integrates the received monitored data and displays the integrated monitored data. The invention solves the problem of large energy consumption in the process of monitoring data transmission due to overlong distance in the process of monitoring data transmission.
Description
Technical Field
The invention belongs to the technical field of wireless sensor networks, and particularly relates to a large-area soft soil foundation treatment construction site monitoring system.
Background
The highway industry standard in China defines soft soil foundations, namely soft soil layers with low strength and high compression amount, and most soft soil layers contain certain organic substances. In the prior art, when roads and buildings are built on a soft soil foundation, the soft soil foundation needs to be reinforced, and the reinforcing treatment methods of the soft soil foundation include a soil replacement and filling method, a stone-throwing and sludge squeezing method, a piling reinforcing method, a drainage consolidation method and the like. The vacuum drainage pre-compaction method is a new soft soil reinforcement technology, belongs to a drainage consolidation method, and is used for monitoring the soft soil foundation regularly in the process of adopting the vacuum drainage pre-compaction method to treat the soft soil foundation, and when the area of the soil foundation treatment is relatively large, the existing soft soil foundation monitoring technology mainly comprises the following three modes: firstly, the soft soil foundation is monitored by manual means, so that the efficiency is low; secondly, the soft soil foundation is monitored by a wired sensor, but because the detected soft soil foundation area is large, a plurality of sensors are needed, a wired transmission mode is adopted, and the cable laying cost are high; thirdly, the soft soil foundation is monitored by a wireless sensor, but a plurality of sensors are needed due to the large soft soil foundation area, and the wireless transmission mode is adopted, so that the energy consumed in the process of monitoring data transmission is large due to the overlong transmission distance of the monitoring data.
Disclosure of Invention
The invention aims to provide a large-area soft soil foundation treatment construction site monitoring system, which solves the problem that the energy consumption in the monitoring data transmission process is large due to overlong distance in the monitoring data transmission process.
The invention is realized by the following technical scheme:
a large-area soft soil foundation treatment construction site monitoring system comprises a monitoring center, a plurality of 5G base stations, a plurality of coordinators and a plurality of sensor nodes, wherein the monitoring center is respectively in communication connection with the plurality of 5G base stations, the coordinators comprise a first GPS module used for acquiring position information, the plurality of 5G base stations and the plurality of sensor nodes form a plurality of ZigBee subnetworks through the plurality of coordinators, each ZigBee subnetwork comprises a 5G base station and a coordinator, and the 5G base stations, the coordinators and the sensor nodes which are positioned in the same ZigBee subnetwork are in communication connection with each other;
the sensor nodes are deployed on the soft soil foundation and used for monitoring the soft soil foundation, each sensor node comprises a second GPS module used for acquiring position information, each sensor node transmits monitoring data to a coordinator in the same ZigBee subnetwork in real time, the coordinator and the 5G base station transmit the monitoring data to a monitoring center, and the monitoring center integrates the received monitoring data and displays the integrated monitoring data;
the ZigBee subnetwork comprises the following construction processes:
s110, acquiring the position information of each coordinator and the position information of each sensor node, and respectively marking each coordinator as a NextID node;
s120, for each NextID node, according to the position information of the NextID node and the position information of all the sensor nodes, a plurality of target sensor nodes closest to the NextID node are found, the found plurality of target sensor nodes are stored in a neighbor node queue of the NextID node, and meanwhile, the found plurality of target sensor nodes are added into a ZigBee subnetwork node queue where the NextID node is located;
s130, judging whether the total number of nodes in the ZigBee subnetwork node queues is the same as the number of all the sensor nodes, if not, finding a sensor node far from the next ID node2 in the neighbor node queue of each next ID node, and taking the sensor node as a new next ID node;
and S140, repeating the step S120 and the step S130 until the total number of nodes in the node queues of all ZigBee subnetworks is the same as the number of all sensor nodes.
Further, the process of finding a number of target sensor nodes closest to the NextID node is as follows:
s121, finding four sensor nodes closest to the NextID node from all the sensor nodes;
s122, judging whether the sensor node is added into the ZigBee subnetwork for each found sensor node, if the sensor node is not added into the ZigBee subnetwork, executing the step S123, and if the sensor node is added into the ZigBee subnetwork, executing the step S124;
s123, taking the sensor node as a target sensor node;
s124, accumulating the searching coefficients m by 1, searching the sensor nodes which are close to the (4+m) th sensor node of the NextID node in all the sensor nodes, wherein the initial value of the searching coefficient m is 0, if the searching coefficient m can be found, executing the step S122, and if the searching coefficient m can not be found, executing the step S125;
s125, finishing searching.
Further, the 5G base station comprises an edge server, the edge server of the 5G base station performs integration check on all received monitoring data, judges whether all received monitoring data comprise monitoring data of all sensor nodes in the ZigBee subnetwork where the received monitoring data are located, and if yes, sends the integrated monitoring data to a monitoring center; if not, the retransmission command is sent to the coordinator through the 5G base station, the coordinator broadcasts the retransmission command to all sensor nodes in the same sub-network, the sensor nodes receiving the broadcast message re-acquire the monitoring data, and the acquired monitoring data are sent to the coordinator.
Further, the system also comprises a plurality of handheld terminals which are in communication connection with any 5G base station, and each handheld terminal comprises a third GPS module for acquiring position information; the edge server of the 5G base station analyzes all the received monitoring data, judges whether each monitoring data is abnormal, if so, obtains the position information of the sensor node for collecting the abnormal monitoring data as a target position, finds a target handheld terminal closest to the target position according to the target position and the position information of a plurality of handheld terminals, and sends the abnormal monitoring data and the target position to the target handheld terminal through the 5G base station.
Further, each sensor node executes a preset two-way data transmission algorithm, monitoring data is transmitted to a coordinator in the same ZigBee subnetwork in real time, and the two-way data transmission algorithm comprises the following steps:
s201, whether the preset monitoring data acquisition time is started or not, if yes, executing a step S203, and if not, executing a step S211;
s202, whether a retransmission broadcast message is received, if yes, executing a step S203, and if not, executing a step S208;
s203, collecting current monitoring data;
s204, finding out two sensor nodes closest to a coordinator of the same ZigBee subnetwork from all neighbor nodes of the same ZigBee subnetwork, and respectively marking the two sensor nodes as Node1 and Node2;
s205, judging whether a coordinator exists in the Node1 and the Node2, if yes, executing a step S206, and if not, executing a step S207;
s206, transmitting the monitoring data to the coordinator;
s207, monitoring data are respectively transmitted to Node1 and Node2;
s208, whether monitoring data sent by a neighbor node are received or not, if yes, step S209 is executed;
s209, receiving monitoring data sent by a neighbor node, and executing a step S204;
s210, if the preset data transmission time is over, executing step S211
S211, dormancy, executing step S201.
Further, the sensor node further comprises a first processor, a first ZigBee communication module, an A/D conversion module, a negative pressure sensor, a memory and a first battery module, wherein the first processor is respectively connected with the first ZigBee communication module, the second GPS module, the memory and the A/D conversion module, the negative pressure sensor is connected with the A/D conversion module, and the first battery module supplies power for the first processor, the second GPS module, the A/D conversion module, the negative pressure sensor and the memory.
Further, the coordinator also comprises a second processor, a second ZigBee communication module, a first GPS module, a serial port and a second battery module, wherein the second processor is respectively connected with the second ZigBee communication module, the first GPS module and the serial port, the second battery module supplies power for the second processor, the second ZigBee communication module, the first GPS module and the serial port, and the second processor is in communication connection with the 5G base station through the serial port.
Compared with the prior art, the invention has the beneficial effects that: the soft soil foundation monitoring system is reasonable in design, can monitor the soft soil foundation in real time, and divide a plurality of sensor nodes deployed on the soft soil foundation into a plurality of ZigBee subnetworks through a plurality of coordinators, wherein the network scale of the ZigBee subnetworks is small, the distances between the sensor nodes and the coordinators in the same ZigBee subnetwork are relatively close, the monitoring data transmission is convenient, the energy consumption of the monitoring data transmission is small, and the service lives of the sensor nodes and the coordinators are long; each sensor node can collect the monitoring data of the soft soil foundation in real time, the monitoring data are sent to a coordinator in the same ZigBee subnetwork, and then the coordinator and the 5G base station are transmitted to a monitoring center, so that manual participation is not needed, the monitoring efficiency is high, the monitoring center integrates the received monitoring data, and the integrated monitoring data are displayed, so that monitoring staff can conveniently check and monitor the soft soil foundation, and real-time effective monitoring of the soft soil foundation is truly realized; the invention has strong expandability, the data acquisition and transmission parts of the monitoring center, the coordinator and the sensor nodes all adopt a wireless communication technology, and the increase of the monitoring area of the soft soil foundation can be realized by only adding the sensor nodes, thereby having good mobility and convenient maintenance.
Drawings
FIG. 1 is a schematic diagram of a large area soft soil foundation treatment job site monitoring system of the present invention;
FIG. 2 is a flow chart of steps of a ZigBee subnetwork construction process in a large-area soft soil foundation treatment construction site monitoring system;
FIG. 3 is a schematic diagram of a sensor node in the large-area soft soil foundation treatment construction site monitoring system of the present invention;
FIG. 4 is a schematic diagram of a coordinator in a large-area soft soil foundation treatment construction site monitoring system according to the present invention;
fig. 5 is a flowchart showing the steps of the two-way data transmission algorithm in the large-area soft soil foundation treatment construction site monitoring system according to the present invention.
In the figure, a 1-monitoring center, a 2-5G base station, a 3-coordinator, a 31-second processor, a 32-second ZigBee communication module, a 33-first GPS module, a 34-serial port, a 35-second battery module, a 4-sensor node, a 41-second GPS module, a 42-first processor, a 43-first ZigBee communication module, a 44-A/D conversion module, a 45-negative pressure sensor, a 46-memory, a 47-first battery module and a 5-soft soil foundation.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Referring to fig. 1 and 2, fig. 1 is a schematic diagram of a large-area soft soil foundation treatment construction site monitoring system according to the present invention, and fig. 2 is a flowchart of steps of a ZigBee subnetwork construction process in the large-area soft soil foundation treatment construction site monitoring system according to the present invention. The large-area soft soil foundation treatment construction site monitoring system comprises a monitoring center 1, a plurality of 5G base stations 2, a plurality of coordinators 3 and a plurality of sensor nodes 4, wherein the monitoring center 1 is respectively in communication connection with the plurality of 5G base stations 2, the coordinators 3 comprise a first GPS module 33 used for acquiring position information, the plurality of 5G base stations 2 and the plurality of sensor nodes 4 form a plurality of ZigBee subnetworks through the plurality of coordinators 3, each ZigBee subnetwork comprises a 5G base station 2 and a coordinator 3, and the 5G base stations 2, the coordinators 3 and the sensor nodes 4 which are positioned in the same ZigBee subnetwork are in communication connection with each other; the sensor nodes 4 are deployed on the soft soil foundation 5 and used for monitoring the soft soil foundation 5, each sensor node 4 comprises a second GPS module 41 used for acquiring position information, each sensor node 4 transmits monitoring data to the coordinator 3 in the same ZigBee subnetwork in real time, then the coordinator 3 and the 5G base station 2 transmit the monitoring data to the monitoring center 1, and the monitoring center 1 integrates the received monitoring data and displays the integrated monitoring data;
the ZigBee subnetwork comprises the following construction processes:
s110, acquiring the position information of each coordinator 3 and the position information of each sensor node 4, and respectively marking each coordinator 3 as a NextID node;
s120, for each NextID node, according to the position information of the NextID node and the position information of all the sensor nodes 4, a plurality of target sensor nodes closest to the NextID node are found, the found plurality of target sensor nodes are stored in a neighbor node queue of the NextID node, and meanwhile, the found plurality of target sensor nodes are added into a ZigBee subnetwork node queue where the NextID node is located;
s130, judging whether the total number of nodes in the ZigBee subnetwork node queues is the same as the number of all the sensor nodes 4, if not, finding the sensor node 4 far away from the next ID node2 in the neighbor node queue of each next ID node, and taking the sensor node 4 as a new next ID node;
and S140, repeating the step S120 and the step S130 until the total number of nodes in the node queues of all ZigBee subnetworks is the same as the number of all sensor nodes 4.
Referring to fig. 3 and fig. 4 in combination, fig. 3 is a schematic structural diagram of a sensor node in the large-area soft soil foundation treatment construction site monitoring system according to the present invention, and fig. 4 is a schematic structural diagram of a coordinator in the large-area soft soil foundation treatment construction site monitoring system according to the present invention. Because the density of the 5G base stations 2 in the 5G network is 3-4 times that of the 4G base stations in the 4G network, a plurality of 5G base stations 2 need to be deployed in a large-area soft soil foundation 5 to be detected, a coordinator 3 is deployed near the periphery of each 5G base station 2, the coordinator 3 is in communication connection with the 5G base stations 2, the coordinator 3 is a ZigBee coordinator 3 and is used for constructing a ZigBee sub-network, a plurality of sensor nodes 4 are divided into a plurality of ZigBee sub-networks, direct communication can be performed among the 5G base stations 2, the coordinator 3 and the sensor nodes 4 in the same ZigBee sub-network, and direct communication cannot be performed among the 5G base stations 2, the coordinator 3 and the sensor nodes 4 distributed in different ZigBee sub-networks. The multiple sensor nodes 4 are made close to the coordinator 3 and 5G base station 2 to which they belong, reducing the energy consumption of monitoring data transmission. In an embodiment, the sensor node 4 further comprises a first processor 42, a first ZigBee communication module 43, an a/D conversion module 44, a negative pressure sensor 45, a memory 46, and a first battery module 47, where the first processor 42 is connected to the first ZigBee communication module 43, the second GPS module 41, the memory 46, and the a/D conversion module 44, and the negative pressure sensor 45 is connected to the a/D conversion module 44, and the first battery module 47 supplies power to the first processor 42, the second GPS module 41, the a/D conversion module 44, the negative pressure sensor 45, and the memory 46. The plurality of sensor nodes 4 are deployed on the plurality of monitoring points of the soft soil foundation 5, the negative pressure sensor 45 is used for monitoring the negative pressure value of the soft soil foundation 5, the A/D conversion module 44 is used for collecting the negative pressure value of the soft soil foundation 5 monitored by the negative pressure sensor 45 and converting the negative pressure value into a digital signal, the digital signal is transmitted to the first processor 42, the second GPS module 41 is used for collecting the position information of the sensor nodes 4 and transmitting the position information of the sensor nodes 4 to the first processor 42, and therefore the monitoring data sent by the sensor nodes 4 comprise the negative pressure data and the position information. In each ZigBee subnetwork, the first processor 42 of any sensor node 4 communicates with the first ZigBee communication module 43 of the sensor node 4 within its communication range through the first ZigBee communication module 43, or the first processor 42 of any sensor node 4 communicates with the coordinator 3 within its communication range through the first ZigBee communication module 43. The ZigBee wireless communication technology is adopted, so that the power consumption is low and the service life is long. In an embodiment, the coordinator 3 further includes a second processor 31, a second ZigBee communication module 32, a serial port 34, and a second battery module 35, where the second processor 31 is connected to the second ZigBee communication module 32, the first GPS module 33, and the serial port 34, and the second battery module 35 supplies power to the second processor 31, the second ZigBee communication module 32, the first GPS module 33, and the serial port 34, and the second processor 31 is communicatively connected to the 5G base station 2 through the serial port 34. In each ZigBee subnetwork, the second processor 31 of the coordinator 3 communicates with the sensor nodes 4 within its communication range via the second ZigBee communication module 32.
The construction of the ZigBee subnetwork adopts a network division method according to the relative position between each coordinator 3 and each sensor node 4, and specifically, the steps of constructing the ZigBee subnetwork by adopting the network division method are as follows:
in the above step S110, each coordinator 3 obtains its own position information through its own first GPS module 33, wherein the position information includes coordinate information, and then each coordinator 3 transmits the obtained position information to all neighboring nodes adjacent thereto, and the neighboring nodes of the coordinator 3, that is, the sensor nodes 4 or the coordinators 3 within an area covered by a communication radius with the coordinator 3, can directly communicate with the coordinator 3, each sensor node 4 obtains its own position information through its own second GPS module 41, and likewise, each sensor node 4 transmits the obtained position information to all neighboring nodes adjacent thereto, and each coordinator 3 and each sensor node 4 have a routing function, so that, through dissemination, each coordinator 3 or each sensor node 4 can know the position information of all coordinators 3 and all sensor nodes 4. Since the construction of the ZigBee subnetwork is started by the coordinators 3, each coordinator 3 is denoted as a NextID node, respectively.
In the step S120, for each NextID node, the starting NextID node is the coordinator 3, so that the coordinator 3 calculates the coordinate information of all the sensor nodes 4 according to the coordinate information of itself, and the distance between the coordinator 3 itself and all the sensor nodes 4 can be obtained, so that the coordinator 3 can find a plurality of target sensor nodes closest to itself, store the found plurality of target sensor nodes in the neighbor node queue of the coordinator 3, and add the found plurality of target sensor nodes to the ZigBee subnet node queue where the coordinator 3 is located.
Further, the process of finding a number of target sensor nodes closest to the NextID node is as follows:
s121, finding four sensor nodes 4 closest to the NextID node from all the sensor nodes 4;
s122, judging whether the sensor node 4 is added into the ZigBee subnetwork for each found sensor node 4, if the sensor node 4 is not added into the ZigBee subnetwork, executing the step S123, and if the sensor node 4 is added into the ZigBee subnetwork, executing the step S124;
s123, taking the sensor node 4 as a target sensor node;
s124, accumulating the searching coefficients m by 1, and searching the sensor nodes 4 which are close to the (4+m) th sensor node of the NextID nodes in all the sensor nodes 4, wherein the initial value of the searching coefficient m is 0, if the searching coefficient m can be found, executing the step S122, and if the searching coefficient m can not be found, executing the step S125;
s125, finishing searching.
In steps S121 to S125, each sensor node 4 can only join one ZigBee subnetwork, so in the process of building a ZigBee subnetwork, each sensor node 4 sets a variable Flag to identify whether the sensor node 4 joins a ZigBee subnetwork, for example, if the value of the variable Flag of the sensor node 4 is true, it indicates that the sensor node 4 has joined a ZigBee subnetwork, and if the value of the variable Flag of the sensor node 4 is false, it indicates that the sensor node 4 has not joined a ZigBee subnetwork. The number of the sensor nodes 4 closest to the next id node can be set by itself, in this embodiment, the next id node finds four sensor nodes 4 closest to itself among all the sensor nodes 4 according to its own coordinate information and coordinate information of all the sensor nodes 4, which are respectively a first sensor node, a second sensor node, a third sensor node, and a fourth sensor node. Then sequentially acquiring the values of the variable Flag of the four sensor nodes 4, namely firstly acquiring the value of the variable Flag of the first sensor node, if the value of the variable Flag of the first sensor node is false, indicating that the first sensor node is not added into the ZigBee subnetwork, and then the first sensor node can be added into the ZigBee subnetwork where the Next ID node is located, so that the first sensor node meets the requirement, the first sensor node is used as a target sensor node, and meanwhile, the value of the variable Flag of the first sensor node is changed into true. Then obtaining the value of the variable Flag of the second sensor node, and if the value of the variable Flag of the second sensor node is false, the processing procedure of the second sensor is the same as that of the first sensor; if the value of the variable Flag of the second sensor node is true, it indicates that the second sensor node has already joined the ZigBee subnetwork and cannot join other ZigBee subnetworks, so the second sensor node does not meet the requirements, and needs to find a new sensor node 4. Therefore, the searching coefficient m is accumulated to 1, the initial value of the searching coefficient m is 0, at this time, the searching coefficient m is accumulated to 1, the value of the searching coefficient m becomes 1, the neighbor node of the next id node is searched for the sensor node 4 closest to the next id node (4+m), namely, the neighbor node of the next id node is searched for the sensor node 4 closest to the next id node 5, if the corresponding sensor node 4 can be found, the found sensor node 4 is recorded as a fifth sensor node, whether the fifth sensor node is added to the ZigBee sub-network is judged, the processing procedure of the fifth sensor node is the same as that of the second sensor node, if the fifth sensor node is not added to the ZigBee sub-network, the fifth sensor is used as a target sensor, the value of the variable Flag of the fifth sensor node is changed to tr, if the fifth sensor node is added to the ZigBee sub-network, at this time, the value of the searching coefficient is 2, the found sensor node 4 is recorded as the fifth sensor node, if the fifth sensor node is found to be the same as the sixth sensor node, and the fifth sensor node is found from the sixth sensor node 4. If not, indicating that all sensor nodes 4 have been found, the search is ended. And then sequentially judging whether the third sensor node and the fourth sensor node are added into the ZigBee subnetwork, wherein the processing procedure of the third sensor node and the fourth sensor node is the same as that of the second sensor node, and the detailed description is omitted. Of course, the found sensor nodes 4 may be sequentially processed according to the order of the found sensor nodes 4, for example, when the second sensor node does not meet the requirement, after the fifth sensor node closest to the 5 th sensor node of the NextID node is found, the third sensor node, the fourth sensor node and the fifth sensor node are sequentially processed according to the order of the third sensor node, the fourth sensor node and the fifth sensor node.
In the step S130, after each NextID node finds out that a plurality of target sensor nodes join in the ZigBee subnetwork node queue where it is located, it is determined whether the total number of nodes in the ZigBee subnetwork node queues is the same as the number of all the sensor nodes 4, that is, it is determined whether all the sensor nodes 4 belong to a ZigBee subnetwork, if not, it is indicated that any ZigBee subnetwork is not joined to any sensor node 4, so that a sensor node 4 far from the NextID node2 is found in the neighbor node queue of each NextID node, as a new NextID node, the original NextID node is replaced, that is, each coordinator 3 of the NextID node is changed to find out a sensor node 4 far from the NextID node2 in the neighbor node queue of each NextID node.
In the above step S140, the coordinator 3 changes the NextID node to the sensor node 4 found in step S130, and the processing procedure of the sensor node 4 as the NextID node is the same as that of step S120, and will not be described again. The next id node stores the found plurality of target sensor nodes in the neighbor node queues of the next id node, and adds the found plurality of target sensor nodes to the ZigBee subnetwork node queues where the next id node is located, and then step S130 is performed, and the above steps are repeated until the total number of nodes in all ZigBee subnetwork node queues is the same as the number of all sensor nodes 4. The plurality of coordinators 3 divide the plurality of sensor nodes 4 deployed on the soft soil foundation 5 into a plurality of ZigBee subnetworks, the network scale of the ZigBee subnetworks is small, the distances between the sensor nodes 4 and the coordinators 3 in the same ZigBee subnetwork are relatively close, the monitoring data transmission is convenient, the energy consumption of the monitoring data transmission is small, and the service lives of the sensor nodes 4 and the coordinators 3 are long.
In an embodiment, the 5G base station 2 includes an edge server, and the edge server of the 5G base station 2 performs an integration check on all the received monitoring data, determines whether all the received monitoring data includes the monitoring data of all the sensor nodes 4 in the ZigBee subnetwork where the received monitoring data is located, and if yes, sends the integrated monitoring data to the monitoring center 1; if not, the 5G base station 2 sends a retransmission command to the coordinator 3, the coordinator 3 broadcasts the retransmission command to all the sensor nodes 4 in the same sub-network, the sensor nodes 4 receiving the broadcast message re-collect the monitoring data, and the collected monitoring data is sent to the coordinator 3. The 5G base station 2 comprises an edge server, the edge server provides storage and calculation services for the area nearby the 5G base station 2, the edge server can integrate and check all received monitoring data, judge whether all received monitoring data comprise monitoring data of all sensor nodes 4 in a ZigBee subnetwork where the received monitoring data are located, if yes, send the integrated monitoring data to the monitoring center 1, and therefore the calculation pressure of the monitoring center 1 is relieved, if no, send a retransmission command to the coordinator 3 through the 5G base station 2, after receiving the retransmission command, the coordinator 3 broadcasts a retransmission command to all the sensor nodes 4 in the same subnetwork, the sensor nodes 4 receiving the broadcast message collect the monitoring data again, and send the collected monitoring data to the coordinator 3, and the integrity of the monitoring data of each ZigBee subnetwork is guaranteed.
In an embodiment, the mobile terminal further comprises a plurality of handheld terminals, wherein the plurality of handheld terminals are in communication connection with any 5G base station 2, and each handheld terminal comprises a third GPS module for acquiring position information; the edge server of the 5G base station 2 analyzes all the received monitoring data, judges whether each monitoring data is abnormal, if so, obtains the position information of the sensor node 4 for collecting the abnormal monitoring data as a target position, finds a target handheld terminal closest to the target position according to the target position and the position information of a plurality of handheld terminals, and sends the abnormal monitoring data and the target position to the target handheld terminal through the 5G base station 2. The number of the handheld terminals can be set according to the needs, the number of the handheld terminals is generally the same as the number of monitoring personnel, the handheld terminals are in one-to-one correspondence, when the edge server finds out that the monitoring data is abnormal, the corresponding position information is found in the monitoring data, the position information of the sensor node 4 for collecting the abnormal monitoring data can be obtained, the obtained position information is used as a target position, a plurality of handheld terminals are in communication connection with any 5G base station 2, the edge server can obtain the position information of the plurality of handheld terminals in communication connection with the 5G base station 2 through the 5G base station 2, so that the distance between which handheld terminal and the target position is closest is determined, the target handheld terminal closest to the target position is found, and then the edge server can push the abnormal monitoring data and the target position to the target handheld terminal in real time, so that the monitoring personnel with the portable target handheld terminal can check the past target position.
Referring to fig. 5 in combination, fig. 5 is a flowchart illustrating a two-way data transmission algorithm in a large-area soft soil foundation treatment construction site monitoring system according to the present invention. In an embodiment, each sensor node 4 executes a preset two-way data transmission algorithm, and transmits the monitoring data to the coordinator 3 in the same ZigBee subnetwork in real time, where the two-way data transmission algorithm includes the steps of:
s201, whether the preset monitoring data acquisition time is started or not, if yes, executing a step S203, and if not, executing a step S211;
s202, whether a retransmission broadcast message is received, if yes, executing a step S203, and if not, executing a step S208;
s203, collecting current monitoring data;
s204, finding out two sensor nodes closest to a coordinator of the same ZigBee subnetwork from all neighbor nodes of the same ZigBee subnetwork, and respectively marking the two sensor nodes as Node1 and Node2;
s205, judging whether a coordinator exists in the Node1 and the Node2, if yes, executing a step S206, and if not, executing a step S207;
s206, transmitting the monitoring data to the coordinator;
s207, monitoring data are respectively transmitted to Node1 and Node2;
s208, whether monitoring data sent by a neighbor node are received or not, if yes, step S209 is executed;
s209, receiving monitoring data sent by a neighbor node, and executing a step S204;
s210, if the preset data transmission time is over, executing step S211
S211, dormancy, executing step S201.
In the steps S201 to S210, the sensor Node 4 is used as a terminal Node and is also used as a routing Node, the sensor Node 4 is in a dormant state when no acquisition task is performed, so that the energy consumption of the sensor Node 4 is reduced, when the preset detection data acquisition time of the sensor Node 4 is reached, the sensor Node 4 is awakened, the execution of the data acquisition task is started, the negative pressure data of the soft soil foundation 5 are acquired through the negative pressure sensor 45, the position information of the sensor Node is acquired through the second GPS module 41, then two sensor nodes 4 closest to the coordinator 3 of the same ZigBee subnetwork are found out from all the neighbor nodes belonging to the same ZigBee subnetwork, and are respectively marked as Node1 and Node2, whether the coordinator 3 exists in the Node1 and the Node2 is judged, if the coordinator 3 exists in the Node1 and the Node2, the sensor Node 4 sends the monitoring data to the coordinator 3, and if the coordinator 3 does not exist in the Node1 and the Node2, the sensor Node 4 sends the monitoring data to the Node1 and the Node2 respectively, and the Node2 is used as the transit to the coordinator 3. The sensor Node 4 sends the monitoring data to the Node1 and the Node2 respectively, so that the monitoring data of the sensor Node 4 can be transmitted to the coordinator 3. When the sensor Node 4 receives the retransmission broadcast message, the sensor Node 4 collects the negative pressure data of the soft soil foundation 5 through the negative pressure sensor 45 again, collects the position information of the sensor Node itself through the second GPS module 41, and retransmits the monitoring data to the Node1 and the Node2, or transmits the monitoring data to the coordinator 3. When receiving the detection data sent by the neighbor Node, the detection data is received from the neighbor Node and is sent to the Node1 and the Node2 or the coordinator 3 as the transfer. So that the monitoring data of the sensor nodes 4 of the same ZigBee subnetwork can be transmitted to the coordinator 3 of the same ZigBee subnetwork.
The coordinator 3 sends the received monitoring data to the edge server of the 5G base station 2,5G base station 2 to integrate and check all the received monitoring data, after confirming that no problem exists, all the monitoring data are sent to the monitoring center 1, the monitoring center 1 integrates the received monitoring data and displays the integrated monitoring data, preferably, the monitoring center 1 comprises a controller and a display, the controller draws the position information of the sensor nodes 4 into an identification map according to all the received monitoring data, negative pressure values monitored by the sensor nodes 4 are displayed on the identification map, and then the identification map is sent to the display to be displayed so as to facilitate the monitoring staff to check.
Compared with the prior art, the invention has the beneficial effects that: the soft soil foundation 5 can be monitored in real time, the plurality of sensor nodes 4 deployed on the soft soil foundation 5 are divided into a plurality of ZigBee subnetworks through the plurality of coordinators 3, the network scale of the ZigBee subnetworks is small, the distances between the sensor nodes 4 and the coordinators 3 in the same ZigBee subnetwork are relatively close, the monitoring data transmission is convenient, the energy consumption of the monitoring data transmission is small, and the service lives of the sensor nodes 4 and the coordinators 3 are long; each sensor node 4 can collect the monitoring data of the soft soil foundation 5 in real time, and sends the monitoring data to the coordinator 3 in the same ZigBee subnetwork, and then the coordinator 3 and the 5G base station 2 transmit the monitoring data to the monitoring center 1 without manual participation, so that the monitoring efficiency is high, the monitoring center 1 integrates the received monitoring data and displays the integrated monitoring data, and monitoring staff can conveniently check and monitor the soft soil foundation 5, thereby really realizing real-time effective monitoring of the soft soil foundation 5; the invention has strong expandability, the data acquisition and transmission parts of the monitoring center 1, the coordinator 3 and the sensor nodes 4 all adopt a wireless communication technology, and the increase of the monitoring area of the soft soil foundation 5 can be realized by only adding the sensor nodes 4, thereby having good mobility and convenient maintenance.
The present invention is not limited to the above-described embodiments, but, if various modifications or variations of the present invention are not departing from the spirit and scope of the present invention, the present invention is intended to include such modifications and variations as fall within the scope of the claims and the equivalents thereof.
Claims (7)
1. The large-area soft soil foundation treatment construction site monitoring system is characterized by comprising a monitoring center, a plurality of 5G base stations, a plurality of coordinators and a plurality of sensor nodes, wherein the monitoring center is respectively in communication connection with the plurality of 5G base stations, the coordinators comprise a first GPS module used for acquiring position information, the plurality of 5G base stations and the plurality of sensor nodes form a plurality of ZigBee subnetworks through the plurality of coordinators, and each ZigBee subnetwork comprises a 5G base station and a coordinator, and the 5G base stations, the coordinators and the sensor nodes which are positioned in the same ZigBee subnetwork are in communication connection with each other;
the sensor nodes are deployed on the soft soil foundation and used for monitoring the soft soil foundation, each sensor node comprises a second GPS module used for acquiring position information, each sensor node transmits monitoring data to a coordinator in the same ZigBee subnetwork in real time, the coordinator and a 5G base station transmit the monitoring data to a monitoring center, and the monitoring center integrates the received monitoring data and displays the integrated monitoring data;
the ZigBee subnetwork comprises the following construction processes:
s110, acquiring the position information of each coordinator and the position information of each sensor node, and respectively marking each coordinator as a NextID node;
s120, for each NextID node, according to the position information of the NextID node and the position information of all the sensor nodes, a plurality of target sensor nodes closest to the NextID node are found, the found plurality of target sensor nodes are stored in a neighbor node queue of the NextID node, and meanwhile, the found plurality of target sensor nodes are added into a ZigBee subnetwork node queue where the NextID node is located;
s130, judging whether the total number of nodes in the ZigBee subnetwork node queues is the same as the number of all the sensor nodes, if not, finding a sensor node far from the next ID node2 in the neighbor node queue of each next ID node, and taking the sensor node as a new next ID node;
and S140, repeating the step S120 and the step S130 until the total number of nodes in the node queues of all ZigBee subnetworks is the same as the number of all sensor nodes.
2. The large area soft foundation treatment job site monitoring system according to claim 1, wherein the process of finding a number of target sensor nodes nearest to the NextID node is as follows:
s121, finding four sensor nodes closest to the NextID node from all the sensor nodes;
s122, judging whether the sensor node is added into the ZigBee subnetwork for each found sensor node, if the sensor node is not added into the ZigBee subnetwork, executing the step S123, and if the sensor node is added into the ZigBee subnetwork, executing the step S124;
s123, taking the sensor node as a target sensor node;
s124, accumulating the searching coefficients m to 1, wherein the initial value of the searching coefficient m is 0, searching the sensor nodes which are close to the (4+m) th sensor node of the Next ID nodes in all the sensor nodes, if the sensor nodes can be found, executing the step S122, and if the sensor nodes can not be found, executing the step S125;
s125, finishing searching.
3. The large-area soft soil foundation treatment construction site monitoring system according to claim 1, wherein the 5G base station comprises an edge server, the edge server of the 5G base station performs integration check on all received monitoring data, judges whether all received monitoring data comprise monitoring data of all sensor nodes in a ZigBee subnetwork in which the received monitoring data are located, and if yes, sends the integrated monitoring data to a monitoring center; if not, the 5G base station sends a retransmission command to the coordinator, the coordinator broadcasts the retransmission command to all sensor nodes in the same sub-network, the sensor nodes receiving the broadcast message re-acquire the monitoring data, and the acquired monitoring data is sent to the coordinator.
4. A large area soft soil foundation treatment job site monitoring system according to claim 3, further comprising a plurality of handheld terminals communicatively connected to any 5G base station, each of the handheld terminals including a third GPS module for acquiring location information; and the edge server of the 5G base station analyzes all the received monitoring data, judges whether each monitoring data is abnormal, if so, acquires the position information of a sensor node for acquiring the abnormal monitoring data as a target position, finds a target handheld terminal closest to the target position according to the target position and the position information of a plurality of handheld terminals, and sends the abnormal monitoring data and the target position to the target handheld terminal through the 5G base station.
5. The large-area soft soil foundation treatment construction site monitoring system according to claim 4, wherein each sensor node executes a preset two-way data transmission algorithm, and transmits the monitoring data to a coordinator in the same ZigBee subnetwork in real time, and the two-way data transmission algorithm includes the steps of:
s201, whether the preset monitoring data acquisition time is started or not, if yes, executing a step S203, and if not, executing a step S211;
s202, whether a retransmission broadcast message is received, if yes, executing a step S203, and if not, executing a step S208;
s203, collecting current monitoring data;
s204, finding out two sensor nodes closest to a coordinator of the same ZigBee subnetwork from all neighbor nodes of the same ZigBee subnetwork, and respectively marking the two sensor nodes as Node1 and Node2;
s205, judging whether a coordinator exists in the Node1 and the Node2, if yes, executing a step S206, and if not, executing a step S207;
s206, transmitting the monitoring data to the coordinator;
s207, monitoring data are respectively transmitted to Node1 and Node2;
s208, whether monitoring data sent by a neighbor node are received or not, if yes, step S209 is executed;
s209, receiving monitoring data sent by a neighbor node, and executing a step S204;
s210, if the preset data transmission time is over, executing step S211
S211, dormancy, executing step S201.
6. The large-area soft soil foundation treatment construction site monitoring system according to claim 1, wherein the sensor node further comprises a first processor, a first ZigBee communication module, an A/D conversion module, a negative pressure sensor, a memory and a first battery module, the first processor is respectively connected with the first ZigBee communication module, the second GPS module, the memory and the A/D conversion module, the negative pressure sensor is connected with the A/D conversion module, and the first battery module supplies power for the first processor, the second GPS module, the A/D conversion module, the negative pressure sensor and the memory.
7. The large-area soft soil foundation treatment construction site monitoring system according to claim 1, wherein the coordinator further comprises a second processor, a second ZigBee communication module, a serial port and a second battery module, the second processor is respectively connected with the second ZigBee communication module, the first GPS module and the serial port, the second battery module supplies power for the second processor, the second ZigBee communication module, the first GPS module and the serial port, and the second processor is in communication connection with the 5G base station through the serial port.
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