Calibration method for the core parameters of high temperature strain gauges
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摘要: 針對自主研制的自由框架絲柵式高溫應變片,建立高溫應變片參數高精度標定裝置,提出適合可行的標定方法,確定影響高溫應變片測量結果的關鍵參數.根據提出的關鍵參數標定方法,可以得到高溫應變片的靈敏度系數、熱輸出、零漂和蠕變特性隨溫度變化的曲線,建立應變測量的精度補償模型,最終通過應變測量補償驗證并取得可信的結果,表明提出的標定方法準確可行,并可推廣到其他形式的高溫應變片參數測量中.Abstract: A high-precision calibration device was established for self-developed free frame wire high temperature strain gauges,a feasible calibration method was introduced,and some important parameters which affect the measuring results were determined. The change curves of sensitivity coefficient,thermal output,zero-drift and creep with temperature were obtained according to the calibration method,and a compensation model was proposed for strain measurement. Verification test results prove that the calibration method is feasible and correct and can be promoted to other forms of high temperature strain gauge parameter measurements.
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Key words:
- strain gauges /
- high temperature environments /
- parameters /
- calibration methods /
- sensitivity /
- creep
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