Uncertainty evaluation device and method of indirect full-optical path spectrum detection system

Abstract

The invention discloses an uncertainty evaluation device and method of an indirect full-optical path spectrum detection system. The uncertainty evaluation device includes a constant temperature oil tank, an optical fiber pressure detection system, a computer, a high-precision platinum resistor and a grating sensor. The evaluation method comprises the following steps that: test data are obtained; a measurement model is established; the uncertainty of the work straight line of the grating sensor is evaluated; and the uncertainty of the optical fiber pressure detection system is evaluated. According to the uncertainty evaluation device and method of the indirect full-optical path spectrum detection system of the invention, the grating sensor is adopted; uncertainty evaluation is performed on the measurement accuracy of picometer-level wavelength shift quantity of a non-removable wavelength modulation type optical fiber pressure detection system through adopting an indirect method; an uncertainty analysis experimental system is designed and constructed; system error sources are analyzed; a theoretical measurement model and an uncertainty analysis method are established; and the uncertainty value of system measurement errors can be obtained.

Description

technical field [0001] The invention relates to the fields of measurement and uncertainty analysis, in particular to an uncertainty evaluation device and method for an indirect all-optical path spectrum detection system. Background technique [0002] The optical fiber sensing unit senses the change of the external physical quantity, and converts the external physical quantity information into a spectral signal through the optical path. The computer supporting measurement software can finally automatically obtain the external physical quantity change information by analyzing the spectral signal. The integration of light source, optical path and spectrum analyzer (or photoelectric conversion module) is called an all-optical path spectral detection system, which is combined with a computer and test software to realize the collection and analysis of the spectral signal transmitted by the optical fiber sensing unit. The all-optical path spectrum detection system is generally not ...

AI Technical Summary

Problems solved by technology

However, for the micro-structure probe of the optical fiber sensing unit, the whole system detection method has high requirements on the calibration device, and the calibration error of the calibration device will become the largest source of error, seriously affecting the measurement error of the detection system And uncertainty evaluation results, this error is caused by the calibration device and cannot truly reflect the measurement accuracy of the detection system, so the detection method of the whole system (including the pressure sensing unit) is not suitable for the optical fiber pressure detection system Evaluation of Measurement Accuracy

Images