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本文提出了一种用于地学上跨断层蠕变监测,长纵向尺寸的影像光栅系统。利用现有装置做了跨距近15m的模拟实验,对检测到的信号所做的谐波分析表明,莫尔信号质量能够保证应变量的测量精度,在2.540mm量程范围内为1.7×10~(-6)。
This paper presents an image grating system for the geotechnical cross-section creep monitoring and long vertical size. The existing device is used to make a simulation experiment with a span of nearly 15m. The harmonic analysis of the detected signal shows that the moiré signal quality can ensure the measurement accuracy of the strain amount, which is 1.7 × 10 ~ (-6).