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Channel Construction, Time Synchronization and Structural Health Monitoring Method Based on Smartphone
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A smart phone and construction method technology, applied in the direction of synchronization device, wireless communication, measurement device, etc., can solve the problems of limited results, low reliability of analysis results of modal detection and damage identification, and failure to realize time synchronization of mobile phones, etc. Achieve high reliability and precise results
Active Publication Date: 2020-05-26
哈尔滨工业大学人工智能研究院有限公司
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[0005] The purpose of the present invention is to solve the problem that the existing smart phone structure detection can only realize single-point data collection and analysis, and does not realize the time synchronization between mobile phones, which leads to the inability to carry out collaborative analysis on monitoring data, and the obtained results are relatively limited. Due to the low reliability of the analysis results of modal detection and damage identification, a communication channel construction method, time synchronization method and structural health monitoring method based on smart phone wireless local area network are proposed.
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specific Embodiment approach 1
[0032] Specific implementation mode one: the communication channel construction method based on the smart phone wireless local area network of the present implementation mode, including:
[0033] Step 1, prepare several smart phones, one of which is used as a control terminal to build a wireless local area network, and the other is used as a collection terminal to connect to the wireless local area network;
[0034] Step 2, the acquisition end opens a specific port, and waits for the Socket Client to connect as a Socket Server;
[0035] Step 3. Read the Linux kernel / proc / net / arp directory, obtain the IP addresses of all acquisition terminals connected to the wireless LAN of the control terminal, and build a corresponding number of Socket Clients, respectively connect to the SocketServer in each acquisition terminal, and build a complete Socket communication channel.
specific Embodiment approach 2
[0036] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: in step 3, if the control terminal actively disconnects all network connections, then repeat step 3 to re-establish the connection; if the acquisition terminal loses the connection with the control terminal , repeat steps 2 and 3 to re-establish the connection with the control terminal.
[0037] Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0038] Specific implementation mode three: the time synchronization method based on the smart phone wireless local area network of the present implementation mode, such as figure 1 shown, including:
[0039] Step 1, using the method described in the specific implementation mode 1 or 2 to construct the communication channel between the control terminal and each collection terminal;
[0040] Step 2: After receiving the start synchronization signal, the control terminal sends its own time tag t to all collection terminals through the communication channel 1 [1].
[0041] Step 3: The acquisition terminal receives the time stamp t from the control terminal 1 [1], generate a self-time tag t 2 [1].
[0042] Step 4. The control terminal records t 1 [1] and t 2 [1], and record the time tag t of the control end when receiving the time tag returned by the acquisition end 3 [1].
[0043] Step 5. Repeat steps 2 to 4 n times to get the array t 1 [n],t 2 [n],t 3 [n].
[0044] Step ...
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Abstract
The invention relates to the structural health monitoring field, and specifically relates to a communication channel construction method based on a smart phone local area network, a time synchronization method based on a smart phone local area network and a structural health monitoring method. For solving the defect that a current smart phone structural detection method only can realize single point data acquisition analysis and cannot realize time synchronization among phones, so that the obtained modal detection and damage identification result is low in reliability, the invention provides a communication channel construction method based on a smart phone local area network. The communication channel construction method based on a smart phone local area network includes the steps: preparing a plurality of smart phones, selecting one of the smart phones as the control terminal, constructing a wireless local area network, taking the other smart phones as the acquisition terminals, and connecting the wireless local area network; starting specific ports by the acquisition terminals, waiting for Socket Client to connect; and acquiring an IP address which is connected to all the acquisition terminals of the control terminal wireless local area network, constructing the corresponding number of Socket Clients, respectively connecting with Socket Server in each acquisition terminal, and constructing a complete Socket communication channel. The communication channel construction method based on a smart phone local area network, the time synchronization method based on a smart phone local area network and the structural health monitoring method are suitable for structural health monitoring equipment.
Description
technical field [0001] The invention relates to the field of structural health monitoring, in particular to a communication channel construction method, a time synchronization method and a structural health monitoring method based on a smart phone wireless local area network. Background technique [0002] High-rise buildings and bridges are important infrastructures in modern society and play an important role in supporting the normal operation of the entire society. The structural safety of these buildings is not only directly related to the safety of people's lives and properties, but also affects the normal operation of the national economy. During long-term use, due to the joint action of factors such as environmental erosion, material aging, long-term load effects, and component defects, the structure will inevitably gradually accumulate damage, resulting in a decrease in its bearing capacity and even endangering the safe use of the structure. In recent years, there ha...
Claims
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Application Information
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