Research on Adaptive Vibrating Wire Sensors Data Acquisition Method Based on apFFT

Vibrating wire sensors convert the stress and strain parameters of structures into output frequency signals. Therefore, they are widely used for monitoring structural stress and strain in engineering projects. Traditional vibrating wire acquisition systems using time-domain frequency measurement methods are susceptible to environmental interference, resulting in significant measurement errors and even measurement problems such as harmonic interference. This paper presents an adaptive phase-matching data acquisition method for vibrating wire sensors based on digital signal processing. Firstly, phase matching adaptive dual excitation is adopted to effectively improve acquisition efficiency and avoid multi frequency interference problems. Secondly, employing an apFFT-based approach for vibration string data collection to bolster the system's anti-interference capabilities. Finally, evaluation parameters for the quality of vibration string data acquisition were proposed, achieving closed-loop control of adaptive acquisition process and data quality evaluation. Through analysis and experimental comparison, the method proposed in this paper significantly improves the anti-interference ability of data acquisition.