Bridge strain monitoring system and method based on WIFI communication technology

Abstract

The invention discloses a bridge strain monitoring system and method based on WIFI communication technology. The system comprises a string wire sensor arranged on the surface of a key position of a bridge, WIFI vibration wire collectors, a WIFI router and upper computer collection software, wherein each WIFI vibration wire collector comprises a controller, a power supply module, a high-voltage booster circuit, a signal conditioning circuit, a high-voltage switch and a WIFI wireless module; the WIFI vibration wire collectors are connected at two ends of the string wire sensor through leads, thestring wire sensor oscillates under high voltage excitation, and frequency signals are output to the WIFI vibration wire collectors; and the WIFI vibration wire collectors are communicated with the upper computer collection software through a wireless network provided by the WIFI router, and a TCP connection is established through the WIFI wireless module so as to automatically collect the straindata of a bridge structure in real time. The bridge strain monitoring system and method disclosed by the invention have the advantages that a WIFI mature protocol is utilized for avoiding self-designof a networking protocol, and a TCP / IP is adopted to ensure reliable communication processes.

Description

technical field [0001] The invention relates to the technical field of wireless sensors, in particular to a bridge strain monitoring system and method based on WIFI communication technology. Background technique [0002] At present, wired sensors are mostly used to measure the strain and stress of concrete in the monitoring process of bridge construction, that is, wired sensors are arranged before monitoring, and the measurement data is transmitted through wired cables. For the monitoring of long-span bridge structures, there are many measuring points and the distance between measuring points is far away. Obviously, there are problems such as high wiring costs and difficult wiring when using wired cables. Therefore, when permanent wiring is not allowed, it is more convenient and faster to use WIFI-based wireless vibrating wire strain sensors for monitoring and measurement, which can improve work efficiency and save various resources required for monitoring work. [0003] Th...

AI Technical Summary

Problems solved by technology

[0004] ZigBee technology has the disadvantages of short distance and low data rate. Because ZigBee does not support the channel access method of time division multiplexing, there is an occasional delay phenomenon.

The transmission distance of Bluetooth technology has great limitations, high-speed frequency hopping limits the rate of data transmission, and the maximum number of nodes available for connection is not much

[0005] The use of ordinary wireless modules for networking requires self-designed communication protocols. The difficulty of wireless networking protocols lies in dealing with network conflicts. The development cycle of networking protocols is long, with many bugs, low communication efficiency, and small space for power consumption optimization.

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