Resistance-voltage transformation system for sensors in dynamic strain measurement and structural health monitoring
US9863824B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2016 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Sep 19, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M5/0041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A resistance-voltage (R-V) transformation system used in dynamic strain measurement for a structure is provided. The system has single-channel (SC) circuit units each for producing a voltage corresponding to a resistance of a sensing element of a structural-strain sensing network. Each SC circuit unit has a R-V transformation module for converting the resistance into the voltage, a band-pass filter module for filtering the R-V transformation module output after a direct-current bias therein is removed, and a high-gain amplification module for amplifying the filter output. The band-pass filter module is configured such that an unwanted low-frequency component induced by resistance drift of the sensing element is removed while allowing a guided-wave signal component to pass through. Particularly advantageous for the sensing network using nanocomposite sensing elements, the R-V transformation system is useful for a wide range of sensor resistance values, mitigating adverse effects of resistance drift, and enabling simplicity in wiring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.