Frequency spectrum calculation-based measuring device and measuring method for multi-string vibrating string sensor

Abstract

The present invention relates to a frequency spectrum calculation-based measuring device and a measuring method for a multi-string vibrating string sensor and belongs to the field of civil engineering, wherein the device and the method are applied to the structural safety and health monitoring industry. The device comprises a chordal vibrating wire sensor, a signal switching circuit, a boost module, an instrument amplifier, anti-aliasing filter, an analog-to-digital converter, and a digital signal processor (DSP) controller. According to the technical scheme of the invention, the market application limitations of multi-string sensors are solved and the conventional measurement technique is broken through. Meanwhile, the measurement limitation of existing equipment is solved. Therefore, the measurement technical difficulties of the multi-string vibrating string sensor can be solved while no hardware cost (including the number of measurement channels, system complexity, size, power consumption, cable laying and the like) is increased for no matter wired monitoring schemes or wireless monitoring schemes.

Description

technical field [0001] The invention relates to a measuring device and a measuring method of a multi-string vibrating wire sensor based on frequency spectrum calculation, which belongs to the field of civil engineering and is applied to the structural safety and health monitoring industry. Background technique [0002] Existing technology: At present, vibrating wire sensors for multiple steel strings, such as anchor cable gauges, multi-chord force gauges, strain gauge groups, etc., can only match one data acquisition channel with one steel string, such as In the monitoring of subway foundation pits, a monitoring section usually requires four trichord axial force gauges or multiple strain gauge groups, which will result in a monitoring surface requiring at least 12 to 16 channels of measuring equipment, resulting in cost, power consumption, volume, etc. It becomes larger and the wiring is complicated, which is very unfavorable for on-site construction and the promotion of the...

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Problems solved by technology

[0002] Existing technology: At present, vibrating wire sensors for multiple steel strings, such as anchor cable gauges, multi-chord force gauges, strain gauge groups, etc., can only match one data acquisition channel with one steel string, such as In the monitoring of subway foundation pits, a monitoring section usually requires four trichord axial force gauges or multiple strain gauge groups, which will result in a monitoring surface requiring at least 12 to 16 channels of measuring equipment, resulting in cost, power consumption, volume, etc. Larger and complicated wiring, it is very unfavorable for on-site construction and the promotion of the monitoring system

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