CN103337146A - Health monitoring method and health monitoring system of civil engineering structure - Google Patents

Abstract

The embodiment of the present invention discloses a civil engineering structure health monitoring method, including: at least one collection node collects the physical quantities of the civil engineering structure based on the time information sent by the time node; The data packet of the physical value and time stamp, the time stamp is used to indicate the time when the data packet is sent, and the data packet is sent to the monitoring platform through wireless; the monitoring platform will receive the physical value as a time stamp Alignment is performed, and a data curve of each of the collection nodes is generated by using the aligned physical quantity value and the time stamp corresponding to the aligned physical quantity value. Correspondingly, the embodiment of the present invention also discloses a civil engineering structure health monitoring system. Embodiments of the present invention can reduce the cost of monitoring the health status of civil engineering structures.

Description

Method and system for health monitoring of civil engineering structures

technical field

The invention relates to the field of civil engineering, in particular to a method and system for health monitoring of civil engineering structures.

Background technique

The health status of civil engineering structures is mainly reflected by the physical quantities of civil engineering structures, for example, the health status of civil engineering structures can be reflected by monitoring acceleration, strain monitoring and temperature monitoring. However, at present, the acceleration, strain and temperature of civil engineering structures are monitored by wired equipment, that is, the monitored acceleration values, strain values and temperature values can only be transmitted to the equipment controlling civil engineering structures through wired methods. In this way, a large number of transmission lines need to be arranged in the civil engineering structure, resulting in a high cost of monitoring the health status of the civil engineering structure.

Contents of the invention

Embodiments of the present invention provide a method and system for health monitoring of civil engineering structures, which can reduce the cost of monitoring the health status of civil engineering structures.

In order to solve the above technical problems, a method for health monitoring of civil engineering structures provided by an embodiment of the present invention includes:

At least one collection node respectively collects the physical quantities of the civil engineering structure based on the time information sent by the time node;

The at least one collection node generates a data packet including the collected physical value and a time stamp, the time stamp is used to indicate the time when the data packet is sent, and wirelessly sends the data packet to the monitoring platform;

The monitoring platform aligns the received physical quantities with time stamps, and uses the aligned physical quantities and the time stamps corresponding to the aligned physical quantities to generate data curves for each of the collection nodes; wherein, the collection nodes The data curve includes the physical quantity value collected by the collection node and the time stamp information corresponding to the physical quantity value, and the time stamp information included in each data curve is the same.

Correspondingly, an embodiment of the present invention also provides a civil engineering structure health monitoring system, including: at least one collection node, a time node, and a monitoring platform, wherein:

The collection node is used to collect the physical quantity of the civil engineering structure based on the time information sent by the time node;

The collection node is configured to generate a data packet comprising the collected physical value and a time stamp, the time stamp is used to indicate the time when the data packet is sent, and the data packet is sent to the monitoring platform wirelessly;

The monitoring platform is configured to align the received physical quantities with time stamps, and use the aligned physical quantities and the time stamps corresponding to the aligned physical quantities to generate data curves for each of the collection nodes; wherein, the The data curve of the collection node includes the physical quantity value collected by the collection node and the time stamp information corresponding to the physical quantity value, and the time stamp information included in each data curve is the same.

In the above technical solution, the collection node sends data packets to the monitoring platform wirelessly, and the monitoring platform can receive data packets sent by multiple collection nodes, and the monitoring platform sends data packets according to the data packets sent by the multiple collection nodes. A physical quantity value and a time stamp are used to generate a health schematic diagram of the civil engineering structure including data curves of multiple collection nodes, so as to obtain the health status of the civil engineering structure. In this way, there is no need to arrange lines in the civil engineering structure, and the data collected by multiple collection nodes can be analyzed, thereby reducing the cost of monitoring the health status of the civil engineering structure.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic flow chart of a civil engineering structure health monitoring method provided by an embodiment of the present invention;

Fig. 2 is a schematic flow chart of another civil engineering structure health monitoring method provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of an optional alignment of physical quantities provided by an embodiment of the present invention;

Fig. 4 is a schematic diagram of an optional data curve chart provided by an embodiment of the present invention;

Fig. 5 is a schematic flowchart of another civil engineering structure health monitoring method provided by an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a civil engineering structure health monitoring system provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Fig. 1 is a schematic flow chart of a civil engineering structure health monitoring method provided by an embodiment of the present invention, as shown in Fig. 1 , including:

101. At least one collection node respectively collects physical quantities of civil engineering structures based on the time information sent by the time node.

The above at least one collection node may be distributed in different positions of the civil engineering structure, so as to comprehensively monitor the health status of the civil engineering structure. The collection of the physical quantity of the civil engineering structure based on the time information sent by the time node may be that each collection node collects the physical quantity of the wooden engineering structure at the same starting time and collection frequency. That is, each collection node adjusts its own clock according to the information sent by the time node, so that the clock of each collection node is the same, and each collection node starts to collect the physical quantities of the wood engineering structure at the preset time point. In this way, the starting time for each collection node to collect the physical quantities of the wood engineering structure is the same, and the collection frequency can be uniformly pre-set.

102. At least one collection node generates a data packet including the collected physical value and a time stamp, where the time stamp is used to indicate the time when the data packet is sent, and wirelessly sends the data packet to the monitoring platform.

Wherein, the aforementioned sending the data packet to the monitoring platform through wireless may specifically be sending the data packet to the monitoring platform through a wireless network. Specifically, each collection node may generate a data packet for each collected physical value, and then send the generated data packet to the monitoring platform. When the collection node sends the data packet to the monitoring platform, it can be directly sent to the monitoring platform through the wireless network, or it can be sent to the monitoring platform through other transit collection nodes using the wireless network. For example: collection node A sends data packet A of collection node A to collection node B, and collection node B sends data A and data packet B of collection node B to the monitoring platform. Or it can also be sent to the monitoring platform through multiple collection nodes.

103. The monitoring platform aligns the received physical values with time stamps, and uses the aligned physical values and the time stamps corresponding to the aligned physical values to generate data curves for each of the collection nodes; wherein, the data curves of the collection nodes The data curve includes the physical quantity value collected by the collection node and the time stamp information corresponding to the physical quantity value, and the time stamp information included in each data curve is the same.

After the monitoring platform receives the data packets sent by at least one of the above collection nodes, it parses these data packets to obtain the physical value and time stamp contained in each data packet, and then aligns these physical values with time stamps, and then takes each collection node The physical quantities of the same time stamp generate data curves for each acquisition node. For example: the data packets sent by each collection node received by the monitoring platform are aligned with time stamp A, that is, at the time point of time stamp A, each collection node sends a data packet to the monitoring platform, then the monitoring platform The data curve generated by the collection node is drawn with this time point as the starting point, and the data curve drawn by the monitoring platform for each collection node can be updated in real time, so that the time stamp contained in the data curve of each collection node can be ensured. Are the same.

In the above technical solution, the collection node sends data packets to the monitoring platform wirelessly, and the monitoring platform can receive data packets sent by multiple collection nodes, and the monitoring platform sends data packets according to the data packets sent by the multiple collection nodes. A physical quantity value and a time stamp are used to generate a health schematic diagram of the civil engineering structure including data curves of multiple collection nodes, so as to obtain the health status of the civil engineering structure. In this way, there is no need to arrange lines in the civil engineering structure, and the data collected by multiple collection nodes can be analyzed, thereby reducing the cost of monitoring the health status of the civil engineering structure.

Fig. 2 is a schematic flow chart of another civil engineering structure health monitoring method provided by an embodiment of the present invention, as shown in Fig. 2 , including:

201. At least one collection node receives time information sent by the time node, and each collection node adjusts a clock of the collection node according to the time information.

The time node can send time information to at least one collection node through the wireless network, and when each collection node receives the time information, it can adjust the clock of the collection node so that the clocks of each collection node are consistent. Wherein, the above-mentioned time information may specifically be multiple time stamps, that is, the time node sends multiple time stamps to each of the above-mentioned collection nodes. Each collection node updates the clock of the collection node according to multiple time stamps sent by the time node, so that the clock of each collection node is consistent with the clock of the time node. It is proved by experiments that when the above time information contains three time stamps, the adjusted clock of each acquisition node is most consistent with the clock of the time node.

202. At least one collection node collects the physical quantities of the civil engineering structure at a preset time point and at a preset collection frequency.

The collection of physical quantities of civil engineering structures may be the collection of at least one of the following physical quantities of civil engineering structures:

Acceleration, strain and temperature are collected, wherein the acceleration includes acceleration in the first direction, acceleration in the second direction and acceleration in the third direction; for example: acceleration in the X-axis direction, acceleration in the Y-direction and acceleration in the Z-direction. That is, each collection node can collect one or more of the above physical quantities.

203. At least one collection node generates a data packet including the collected physical quantity and a time stamp, where the time stamp is used to indicate the time when the data packet is sent, and wirelessly sends the data packet to the monitoring platform.

Wherein, the aforementioned sending the data packet to the monitoring platform through wireless may specifically be sending the data packet to the monitoring platform through a wireless network. The collection node can compress the collected physical value and time stamp to obtain the above data packet. Of course, the data packet can also collect the identification information of the node and the identification information of the monitoring platform, so that the data packet can be transmitted smoothly in the wireless network. When the monitoring platform is obtained and the data packet received by the monitoring platform is obtained, the data packet is generated by which collection node can also be obtained through the identification information of the collection node contained in the data packet.

The collection node can also send the data packet to the base station, and then the base station sends it to the monitoring platform.

204. The monitoring platform aligns the received physical values with time stamps, and uses the aligned physical values and the time stamps corresponding to the aligned physical values to generate data curves for each of the collection nodes; wherein, the data curves of the collection nodes The data curve includes the physical quantity value collected by the collection node and the time stamp information corresponding to the physical quantity value, and the time stamp information included in each data curve is the same.

After receiving the data packet, the monitoring platform will distinguish according to the collection node that sent and generated the data packet, that is, classify the data packet to obtain the data packet generated by each collection node, and then analyze the data packet to obtain the physical value and time contained in the data packet Then align the physical value according to the time stamp, and generate the data curve of each acquisition node according to the aligned physical value and time stamp. Specifically, an entry may be established for each collection node, each entry stores the physical value and time stamp of the collection node, and then the physical value in each entry is aligned according to the time stamp. It can be shown in Figure 3. Figure 3 only uses the physical quantities of two collection nodes as an example. Figure 3-1 shows that the monitoring platform receives data packets from collection node A and collection node B, where the physical quantity of collection node A corresponds to The time stamps of the physical values of the collection node B are from 2000 to 2100, and the corresponding time stamps of the physical values of the collection node B are from 2050 to 2150. Although the numbers of the physical values of the two collection nodes are the same, the time stamps corresponding to these physical values are different. Yes, if the time stamp corresponding to the physical value is not considered, the data curve generated in this way cannot accurately represent the health status of the civil engineering structure. The monitoring platform can then align the physical values of the two collection nodes according to the time stamps to obtain the physical values and corresponding time stamps shown in Figure 3-2. Since the time stamps corresponding to the physical values of the two collection nodes include time stamp 2050, so that the time stamp 2050 can be aligned, and because the collection node A only contains the physical value corresponding to the time stamp 2100, and the collection node B contains the physical quantity value corresponding to the time stamp 2050 to the time stamp 2150, that is, the collection node A and the collection The same physical quantity contained in node B is the physical quantity corresponding to time stamp 2050 to time stamp 2100, so the monitoring platform uses the physical quantity corresponding to time stamp 2050 to time stamp 2100 of collection node A and collection node B to generate collection node A and Collect the data curve of node B.

As an optional implementation manner, the type of the physical quantity may include at least one of the following:

Acceleration, strain and temperature; wherein, the acceleration includes the acceleration in the first direction, the acceleration in the second direction and the acceleration in the third direction; for example: the acceleration in the X-axis direction, the acceleration in the Y direction and the acceleration in the Z direction. That is, each collection node can collect one or more of the above physical quantities.

The above-mentioned at least one collection node generates a data packet containing the collected physical value and time stamp, which may include:

At least one collection node generates a data packet including the collected physical value, type information of the physical value and a time stamp; that is, each data packet includes type information of the physical value in the data packet. Specifically, the type information of the physical value can be added in front of the physical value, for example: the two bytes in front of the physical value are used to represent the type information of the physical value, such as the character "A" means strain, and the character "B" "Indicates the temperature, the character "C1" indicates the acceleration in the first direction, the character "C2" indicates the acceleration in the second direction, and the character "C3" indicates the acceleration in the third direction. In this way, when the monitoring platform receives and analyzes the data packet, the type of physical value can be obtained to distinguish the type of physical value collected by each collection node, that is, to obtain different types of physical values collected by each collection node, for example, in Five sub-entries are generated in the entry of each collection node, and each sub-entry is used to store a type of physical value. In this way, the data curve of each collection node generated by the monitoring platform can include at least one of the following items:

The data curve of acceleration in the first direction, the data curve of acceleration in the second direction, the data curve of acceleration in the third direction, the data curve of strain and the data curve of temperature. Among them, the same type of data curves of all collection nodes are displayed in the same graph. This provides a clearer representation of the health status of civil engineering structures. For example: the chart shown in Figure 4 can be drawn, wherein, the chart shown in Figure 4 includes the X-axis acceleration data curve chart, and the X-axis acceleration data curve chart includes the X-axis acceleration data curves of all collection nodes, so that it can be clearly The acceleration in the X-axis direction of the entire civil engineering structure is clearly shown, and the chart shown in Figure 4 can also include a Y-axis acceleration data curve chart, a Z-axis acceleration data curve chart, a temperature data curve chart and a strain data curve chart, wherein, Y The axis acceleration data curve chart, the Z-axis acceleration data curve chart, the temperature data curve chart and the strain data curve chart may be the same as the X-axis acceleration data curve and may contain data curves of all acquisition nodes. Human-machine can clearly show the health status of the whole civil engineering structure.

As an optional implementation, the above data packet may also include:

The transmission path information that the collection node that generates the data packet transmits to the monitoring platform.

After the at least one collection node sends the data packet to the monitoring platform wirelessly, the method may further include:

The monitoring platform calculates the topology of the at least one collection node according to the transmission path information included in each data packet.

That is, the data packet can also include the identification information of the collection node that generates the data packet and the identification information of the monitoring platform. When the collection node that generates the data packet sends the data packet to the monitoring platform and has to be forwarded by other collection nodes, the The data packet may also include identification information of the collection nodes that forward the data packet. For example: when the data packet generated by collection node A needs to be forwarded by collection node B and collection node C before it can be sent to the monitoring platform, the data packet generated by collection node A contains the identification information of collection node A and the identification information of the monitoring platform, namely Source identification information and destination identification information, when the collection node B receives the data packet, through the identification information of A contained in the data packet and the identification information of the monitoring platform, it can be known that the data packet is sent to the monitoring platform, and the collection The node B can add the identification information of the collection node B and the identification information of the collection node C to the data packet, and then send the data packet to the collection node C, and the collection node C can send the data packet to the monitoring platform, and the monitoring platform After receiving the data packet, the transmission path from collection node A to the monitoring platform, and the paths from collection node B and collection node C to the monitoring platform can be obtained through the above identification information, so that the collection node A, collection node B and collection node can be calculated. The topology of node C. Similarly, the monitoring platform can also obtain the topological structure of other collection nodes, so that the topological structure of all collection nodes for monitoring civil engineering structures can be obtained. In this way, the monitoring platform can better manage the collection nodes through the calculated topology, and more clearly reflect the local health status of the civil engineering structure through the topology. For example: when which collection node fails to send the data packet to the monitoring platform, the monitoring platform finds the faulty collection node through the calculated topology.

In the above technical solution, various optional implementation modes are realized on the basis of the above embodiments, and all of them can reduce the cost of monitoring the health status of civil engineering structures.

The following is an example of a specific implementation example:

The aforementioned collection node may be a wireless sensor node, and the wireless transmitter node may include a wireless transmission node and a data collection board. The collection node can collect acceleration, strain and temperature at the same time. And it meets the requirement of sampling frequency required for civil engineering health monitoring. The acquisition node can adopt embedded programming design, and the programming language adopts TinyOS2.x. The program flow of the collection node is shown in Figure 5, where the nodes in Figure 5 represent collection nodes. After the collection node receives the time information sent by the time node, it updates the clock in the data collection node. The clocks of all collection nodes are the same, and all collection nodes can be set as follows: when the clock of the collection node is 30 seconds, it starts to Civil engineering structures are used for physical quantity collection. The structure of the data packet generated by the collection node is that the header is the time stamp corresponding to the collected physical value, and the back is the collected physical value. The time stamp indicates that the physical quantity value in the package starts to be collected at the time of the time stamp. The collection node sends the data packet to the mib520 base station through a wireless 2.4GHz wireless device. The base station is connected with the computer through the serial port. The monitoring platform run by the computer can monitor the topological structure between the nodes in the data collection circle, that is, the data transmission path of the collection nodes. It can monitor the physical value waveform collected by each collection node. And the data can be stored in the structured query language (Structured Query Language, SQL) SQL database for future query. The specific plan of the monitoring platform can be: the program is written in VC++, after the serial port data is passed in through the serial port, the OnComm() event in the program is triggered (this event is a well-known event in the computer field, and has no specific Chinese meaning), and the monitoring platform starts to process the data , because each character in the serial port will trigger the OnComm() event, in other words, before receiving the next data packet sent by the base station, the last received data packet must be processed. In order to ensure the processing speed, the received serial port characters are uniformly stored in the m_plistCSReceiveData linked list (this linked list is a well-known linked list in the computer field, and has no specific Chinese meaning). A timer can also be set in the monitoring platform, and the timer is triggered every 1ms. The event after the trigger is to detect whether there is a new data packet stored in the m_plistCSReceiveData linked list. Each data packet sent by the collection node is processed as a piece of data, which contains the identification information of the sender node of the data packet, the identification information of the destination node, the time stamp of the data packet, and the physical value collected in the data packet. Each data processing flow is as follows:

1. The monitoring platform transfers two data into m_pTopologyView (a well-known processing software in the computer field, without specific Chinese meaning) according to the sender node identification information and destination node identification information, and the displayed topology structure is based on the principle of beauty , in the topology graph, the vertical and horizontal distances between nodes have minimum distance regulations. From the above two data, the logical relationship between the two acquisition nodes can be obtained. After generalization, the monitoring platform can determine the logical relationship of all nodes in the wireless sensor network from the received data packets, and draw the topology image according to the principles.

2. The processing time stamp of the monitoring platform Take the acceleration X axis in various monitoring data as an example. In each piece of data, 2 bytes are set as data marking bits to mark the data type. The acceleration X-axis data label is set to C1. When the C1 data label bit is received, the timestamp is stored in the m_plistTimestampx linked list (this linked list is a well-known linked list in the computer field, and has no specific Chinese meaning). The format of the linked list is as follows:

Table 1:

Collection node 1 Collection Node 2 Collection Node 3 Collection Node 4 Collection Node 5 timestamp 1 timestamp 1 timestamp 1 timestamp 1 timestamp 1 timestamp 2 timestamp 2 timestamp 2 timestamp 2 timestamp 2 … … … … …

3. The monitoring platform stores the physical values collected by the collection nodes into the m_plistNodeDataAccx linked list (this linked list is a well-known linked list in the computer field and has no specific Chinese meaning), and the linked list is in the same form as m_plistTimestamp.

4. Set a timer triggered once in 1ms in the monitoring platform, read the return value of the DrawDataChartTickAccx() function (this function is a well-known function in the computer field, without specific Chinese meaning), if the return value is 1, it means Data curves can be drawn. The data needed to draw the curve is stored in m_plistSampleDataAccx. In the DrawDataChartTickAccx() function (this function is a well-known function in the computer field, and has no specific Chinese meaning), first obtain the head pointer of the m_plistNodeDataAccx linked list, and then check whether the next node of the linked list is empty, and loop detection. The algorithm in the loop is: first obtain the timestamp structure of the m_plistTimestampx header, and continue to check whether the narrTimestamp array in the timestamp structure has enough 96 data, that is, 3 data packets. Because each packet is aligned by timestamp. As shown in the figure, ensure that there is sufficient data for alignment. Then store the aligned data into m_plistSampleDataAccx and wait for drawing. At the same time, it is also stored in the corresponding table item in the database for query. The flowchart can be shown in FIG. 3 .

The following is the embodiment of the device of the present invention, which is used to execute the method realized by the method embodiment 1 to 2 of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the specific technical details are not disclosed. , please refer to Embodiment 1 and Embodiment 2 of the present invention.

Fig. 6 is a schematic structural diagram of a civil engineering structure health monitoring system provided by an embodiment of the present invention. As shown in Fig. 6, it includes: at least one collection node 61, a time node 62 and a monitoring platform 63, wherein:

The collection node 61 is configured to collect the physical quantity of the civil engineering structure based on the time information sent by the time node 62 .

The above-mentioned at least one collection node 61 may be distributed in different positions of the civil engineering structure, so as to comprehensively monitor the health status of the civil engineering structure. The physical quantity of the civil engineering structure is collected based on the time information sent by the time node 62, and the start time and frequency of collection of the physical quantity of the wooden engineering structure by each collection node 61 are the same. That is, each collection node 61 adjusts its own clock according to the information sent by the time node 62, so that the clocks of each collection node 61 are the same, and each collection node 61 starts to monitor the wooden engineering structure at a preset time point. The physical quantities are collected, so that each collection node 61 starts to collect the physical quantities of the wood engineering structure at the same start time, and the collection frequency can be uniformly pre-set.

The collection node 61 is configured to generate a data packet including the collected physical value and a time stamp, the time stamp is used to indicate the time when the data packet is sent, and send the data packet to the monitoring platform 63 through wireless.

Wherein, the aforementioned sending the data packet to the monitoring platform 63 through wireless may specifically be sending the data packet to the monitoring platform 63 through a wireless network. Specifically, each collection node 61 may generate a data packet for each collected physical value, and then send the generated data packet to the monitoring platform 63 . When the collection node 61 sends the data packet to the monitoring platform 63, it can be directly sent to the monitoring platform 63 through the wireless network, or sent to the monitoring platform 63 through the wireless network through other transit collection nodes 61 . For example: the collection node A sends the data packet A of the collection node A to the collection node B, and the collection node B sends the data A and the data packet B of the collection node B to the monitoring platform 63 . Or it may also be sent to the monitoring platform 63 through multiple collection nodes 61 .

The collection node 61 can compress the collected physical value and time stamp to obtain the above-mentioned data packet. Of course, the data packet can also collect the identification information of the node 61 and the identification information of the monitoring platform 63, so that the data packet can be easily transmitted during wireless network transmission. When the monitoring platform 63 can be reached smoothly, and the data packet received by the monitoring platform 63 can also be obtained from which collection node 61 the data packet is generated by the identification information of the collection node 61 contained in the data packet.

The collection node 61 may also send the data packet to the base station, and then the base station sends the data packet to the monitoring platform 63 . That is, the system may further include a base station.

The monitoring platform 63 is configured to align the received physical quantities with time stamps, and use the aligned physical quantities and the time stamps corresponding to the aligned physical quantities to generate the data curves of each of the collection nodes 61; wherein, the The data curve of the collection node 61 includes the physical value collected by the collection node and the time stamp information corresponding to the physical value, and the time stamp information included in each of the data curves is the same.

After the monitoring platform 63 receives the data packets sent by the above-mentioned at least one collection node 61, it parses these data packets to obtain the physical values and time stamps contained in each data packet, and then aligns these physical values with time stamps, and then takes each The physical quantity of the same time stamp of the collection nodes 61 generates a data curve of each collection node 61 . For example: the data packet sent by each collection node 61 received by the monitoring platform 63 is aligned with the timestamp A, that is, at the time point of the timestamp A, each collection node 61 has sent the data packet to the monitoring platform 63, then the monitoring The data curve generated by the platform 63 for each collection node 61 is drawn with this time point as the starting point, and the data curve drawn by the monitoring platform 63 for each collection node 61 can be updated in real time, so that it can be guaranteed that each collection node The time stamps contained in the data curves of 61 are all the same.

After receiving the data packet, the monitoring platform 63 will distinguish according to the collection node 61 that sent and generated the data packet, that is, classify the data packet to obtain the data packet generated by each collection node 61, and then analyze the data packet to obtain the physical quantity contained in the data packet value and time stamp, and then align the physical quantity value according to the time stamp, and generate the data curve of each collection node 61 according to the aligned physical quantity value and time stamp. Specifically, an entry may be established for each collection node 61, each entry stores the physical value and time stamp of the collection node 61, and then the physical value in each entry is aligned according to the time stamp. As shown in Figure 3, Figure 3 only uses the physical quantities of two collection nodes 61 for illustration. Figure 3-1 shows that the monitoring platform 63 receives data packets from collection node A and collection node B, wherein the physical quantity of collection node The time stamp corresponding to the value is 2000 to 2100, and the corresponding time stamp of the physical quantity value of the collection node B is 2050 to 2150. Although the quantity of the physical quantity value of the two collection nodes 61 is the same, the time corresponding to these physical quantity values The stamps are different. If the time stamp corresponding to the physical value is not considered, the generated data curve cannot accurately represent the health status of the civil engineering structure. The monitoring platform 63 can align the physical quantities of the two collection nodes 61 according to the time stamps, that is, obtain the physical quantities and corresponding time stamps shown in FIG. 3-2 , because the time stamps corresponding to the physical quantities of the two collection nodes 61 Both contain the timestamp 2050, so that the timestamp 2050 can be aligned, and because the collection node A only contains the physical value corresponding to the timestamp 2100, and the collection node B contains the physical value corresponding to the timestamp 2050 to the timestamp 2150, that is, the collection node A and collection node B contain the same physical quantity value corresponding to time stamp 2050 to time stamp 2100, so monitoring platform 63 uses the physical quantity value corresponding to time stamp 2050 to time stamp 2100 of collection node A and collection node B to generate Data curves of collection node A and collection node B.

As an optional implementation manner, the collection node 61 may also be configured to receive the time information sent by the time node 62, and adjust the clock of the collection node 61 according to the time information;

The collection node 61 can also be used to collect physical quantities of civil engineering structures at a preset time point and with a preset collection frequency.

The time information may include multiple time stamps, and the collection node 61 is further configured to adjust the clock of the collection node 61 according to the multiple time stamps contained in the time information, so that the clock of the collection node 61 is consistent with the time node 62 clocks remain consistent.

Time node 62 can send time information to above-mentioned at least one collection node 61 through wireless network, when each collection node 61 receives this time information, just can adjust the clock of this collection node 61, to reach the clock of each collection node 61 is consistent. Wherein, the above-mentioned time information may specifically be multiple time stamps, that is, the time node 62 sends multiple time stamps to each of the above-mentioned collection nodes 61 . Each collection node 61 updates the clock of the collection node 61 according to the multiple time stamps sent by the time node 62, so that the clock of each collection node 61 is consistent with the clock of the time node 62. Experiments prove that when the above time information includes three time stamps, the adjusted clock of each acquisition node 61 is most consistent with the clock of the time node 62 .

As an optional implementation manner, the type of the physical quantity may include at least one of the following:

Acceleration, strain and temperature; wherein, the acceleration includes the acceleration in the first direction, the acceleration in the second direction and the acceleration in the third direction;

The collection node 61 is further configured to generate a data packet including the collected physical value, type information of the physical value and a time stamp. That is, each data packet includes type information of the physical value in the data packet. Specifically, the type information of the physical value can be added in front of the physical value, for example: the two bytes in front of the physical value are used to represent the type information of the physical value, such as the character "A" means strain, and the character "B" "Indicates the temperature, the character "C1" indicates the acceleration in the first direction, the character "C2" indicates the acceleration in the second direction, and the character "C3" indicates the acceleration in the third direction. In this way, when the monitoring platform 63 receives and parses the data packet, the type of physical value can be obtained to distinguish the type of the physical value collected by each collection node 61, that is, to obtain different types of physical values collected by each collection node 61 , for example, five sub-entries are generated in the entry of each collection node 61, and each sub-entry is used to store a type of physical value. The data curve of each collecting node 61 that monitoring platform 63 generates just can comprise following at least one item like this:

The data curve of acceleration in the first direction, the data curve of acceleration in the second direction, the data curve of acceleration in the third direction, the data curve of strain and the data curve of temperature. Among them, the same type of data curves of all collection nodes are displayed in the same graph. This provides a clearer representation of the health status of civil engineering structures. For example: the chart shown in Figure 4 can be drawn, wherein, the chart shown in Figure 4 contains the X-axis acceleration data curve chart, and the X-axis acceleration data curve chart includes the X-axis acceleration data curves of all collection nodes 61, so that Clearly showing the acceleration in the X-axis direction of the entire civil engineering structure, the chart shown in Figure 4 can also include a Y-axis acceleration data curve chart, a Z-axis acceleration data curve chart, a temperature data curve chart and a strain data curve chart, wherein, The Y-axis acceleration data curve chart, the Z-axis acceleration data curve chart, the temperature data curve chart and the strain data curve chart may be the same as the X-axis acceleration data curve and may include all the data curves of the collection nodes 61 . Human-machine can clearly show the health status of the whole civil engineering structure.

As an optional implementation, the above data packet may also include:

The transmission path information that the collection node 61 that generates the data packet transmits to the monitoring platform 63 .

The monitoring platform 63 can also be used to calculate the topology of the at least one collection node 61 according to the transmission path information contained in each data packet.

That is, the data packet can also include the identification information of the collection node 61 that generates the data packet, and the identification information of the monitoring platform 63. When the collection node 61 that generates the data packet sends the data packet to the monitoring platform 63, it must go through other collection nodes 61, the data packet may also include identification information of the collection nodes 61 that forward the data packet. For example: when the data packet generated by collection node A needs to be forwarded by collection node B and collection node C before it can be sent to the monitoring platform 63, the data packet generated by collection node A contains the identification information of collection node A and the identification information of monitoring platform 63 , that is, the source identification information and the destination identification information. When the collection node B receives the data packet, through the identification information of A contained in the data packet and the identification information of the monitoring platform 63, it can be known that the data packet is sent to the monitoring platform 63, the collection node B can add the identification information of the collection node B and the identification information of the collection node C to the data packet, and then send the data packet to the collection node C, and the collection node C can send the data packet to the monitoring Platform 63, the monitoring platform 63 can obtain the transmission path from the collection node A to the monitoring platform 63, and the path from the collection node B and the collection node C to the monitoring platform 63 through the above-mentioned identification information after receiving the data packet, so as to calculate the collection The topology of node A, collection node B, and collection node C. Similarly, the monitoring platform 63 can also obtain the topological structures of other collecting nodes 61, so that the topological structures of all collecting nodes 61 for monitoring civil engineering structures can be obtained. In this way, the monitoring platform 63 can better manage the collection nodes 61 through the calculated topology, and more clearly reflect the local health status of the civil engineering structure through the topology. For example: when which collection node 61 fails to send the data packet to the monitoring platform 63, the monitoring platform 63 finds the faulty collection node 61 through the calculated topology.

Compared with the traditional wired monitoring system, the above-mentioned civil engineering structure health monitoring system is easier to install with the wireless monitoring system. The collection node 61 (for example: wireless sensor monitoring node) is an intelligent sensor node, which has more freedom in monitoring scheme and data analysis than traditional wired sensors. For example, the sensor program can be designed to form a small network of sensor nodes in a specified part of the area, and the collected data can be calculated and analyzed in the local area, and the final result can be sent to the monitoring platform. And wireless sensors can be placed in the structure under test for a long time without affecting the normal use of the structure. With the continuous development of electronic products, the size of wireless sensors is getting smaller and smaller, and multiple parameters can be measured on one wireless sensor, such as: strain, temperature, light, displacement, acceleration, etc. All of the above are unmatched by wired health monitoring.

In the above technical solution, the collection node sends data packets to the monitoring platform wirelessly, and the monitoring platform can receive data packets sent by multiple collection nodes, and the monitoring platform sends data packets according to the data packets sent by the multiple collection nodes. A physical quantity value and a time stamp are used to generate a health schematic diagram of the civil engineering structure including data curves of multiple collection nodes, so as to obtain the health status of the civil engineering structure. In this way, there is no need to arrange lines in the civil engineering structure, and the data collected by multiple collection nodes can be analyzed, thereby reducing the cost of monitoring the health status of the civil engineering structure.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM for short).

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (10)

1. A civil engineering structural health monitoring method, characterized in that, comprising: At least one collection node respectively collects the physical quantities of the civil engineering structure based on the time information sent by the time node; The at least one collection node generates a data packet including the collected physical value and a time stamp, the time stamp is used to indicate the time when the data packet is sent, and wirelessly sends the data packet to the monitoring platform; The monitoring platform aligns the received physical quantities with time stamps, and uses the aligned physical quantities and the time stamps corresponding to the aligned physical quantities to generate data curves for each of the collection nodes; wherein, the collection nodes The data curve includes the physical quantity value collected by the collection node and the time stamp information corresponding to the physical quantity value, and the time stamp information included in each data curve is the same. 2. The method according to claim 1, wherein the at least one collection node takes the time information sent by the time node as a reference before the physical quantity of the civil engineering structure is collected, the method also includes: The at least one collection node receives the time information sent by the time node, and each of the collection nodes adjusts the clock of the collection node according to the time information; The at least one collection node collects the physical quantity of the civil engineering structure based on the time information sent by the time node, including: The at least one collection node collects the physical quantity of the civil engineering structure at a preset time point with a preset collection frequency. 3. The method according to claim 2, wherein the time information comprises a plurality of time stamps, and the collection node adjusts the clock of the collection node according to the time information, comprising: The collection node adjusts the clock of the collection node according to the multiple time stamps included in the time information, so that the clock of the collection node is consistent with the clock of the time node. 4. The method according to any one of claims 1-3, wherein the type of the physical quantity comprises at least one of the following: Acceleration, strain and temperature; wherein, the acceleration includes the acceleration in the first direction, the acceleration in the second direction and the acceleration in the third direction; The at least one collection node generates a data packet containing collected physical quantities and time stamps, including: The at least one collection node generates a data packet including the collected physical value, type information of the physical value and a time stamp; The data curve of the collection node includes at least one of the following: The data curve of acceleration in the first direction, the data curve of acceleration in the second direction, the data curve of acceleration in the third direction, the data curve of strain and the data curve of temperature; Among them, the same type of data curves of all collection nodes are displayed in the same graph. 5. The method according to any one of claims 1-3, wherein the data packet further comprises: The transmission path information that the collection node that generates the data packet transmits to the monitoring platform; After the at least one collection node sends the data packet to the monitoring platform wirelessly, the method further includes: The monitoring platform calculates the topology of the at least one collection node according to the transmission path information included in each data packet. 6. A civil engineering structural health monitoring system, comprising: at least one collection node, a time node and a monitoring platform, wherein: The collection node is used to collect the physical quantity of the civil engineering structure based on the time information sent by the time node; The collection node is configured to generate a data packet comprising the collected physical value and a time stamp, the time stamp is used to indicate the time when the data packet is sent, and the data packet is sent to the monitoring platform wirelessly; The monitoring platform is configured to align the received physical quantities with time stamps, and use the aligned physical quantities and the time stamps corresponding to the aligned physical quantities to generate data curves for each of the collection nodes; wherein, the The data curve of the collection node includes the physical quantity value collected by the collection node and the time stamp information corresponding to the physical quantity value, and the time stamp information included in each data curve is the same. 7. The system according to claim 6, wherein the collection node is further configured to receive the time information sent by the time node, and adjust the clock of the collection node according to the time information; The collection node is also used to collect physical quantities of civil engineering structures at a preset time point and at a preset collection frequency. 8. The system according to claim 7, wherein the time information includes a plurality of time stamps, and the collection node is further configured to adjust the clock of the collection node according to a plurality of time stamps included in the time information, so as to Make the clock of the collection node consistent with the clock of the time node. 9. The system according to any one of claims 6-8, wherein the type of the physical quantity includes at least one of the following: Acceleration, strain and temperature; wherein, the acceleration includes the acceleration in the first direction, the acceleration in the second direction and the acceleration in the third direction; The collection node is also used to generate a data packet including the collected physical value, the type information of the physical value and a time stamp; The data curve of the collection node includes at least one of the following: The data curve of acceleration in the first direction, the data curve of acceleration in the second direction, the data curve of acceleration in the third direction, the data curve of strain and the data curve of temperature; Among them, the same type of data curves of all collection nodes are displayed in the same graph. 10. The system according to any one of claims 6-8, wherein the data packet further comprises: The transmission path information that the collection node that generates the data packet transmits to the monitoring platform; The monitoring platform is further configured to calculate the topology of the at least one collection node according to the transmission path information included in each data packet.

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