WIFI-based wireless vibrating wire strain collecting device and implementation method thereof

Abstract

The invention discloses a WIFI-based wireless vibrating wire strain collecting device and an implementation method thereof that are applied to data acquisition of a bridge monitoring system. The WIFI-based wireless vibrating wire strain collecting device is composed of a controller, a power supply module, a high-voltage boosting circuit, a high voltage switch, a signal conditioning circuit, and aWIFI wireless module. The controller receives a data acquisition instruction from an upper computer through the WIFI wireless module and outputs a PWM signal to control the high-voltage boosting circuit to generate a high voltage; the high-voltage boosting circuit loads high voltage excitation to a string wire sensor by the high voltage switch; the string wire sensor carries out vibration under the high voltage excitation and a the frequency signal related with the string wire tension is outputted to the signal conditioning circuit for adjustment; and then the controller carries out capturingcounting on the adjusted frequency wave to obtain a frequency value. Therefore, the frequency measurement accuracy of the strain of the bridge structure is improved effectively; and the strain condition of the bridge structure can be monitored in real time.

Description

technical field [0001] The invention relates to the technical field of wireless sensors, in particular to a WIFI-based wireless vibrating wire strain acquisition device and an implementation method thereof. 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 wo...

AI Technical Summary

Problems solved by technology

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.

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