Analysis of error source in the measurement can help to find the way to eliminate error. Accordingly the ultrasonicthicknessmeasurement can adapt well to the measurement of artillery body.
The Methodological investigation on the measurement of thickness of downhole casing with ultrasonic pulse echo technique is carried out both in theory and in experiments.
利用理论分析和实验模拟的方法研究了超声脉冲反射技术测量井下套管厚度的方法。
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The DGH-4000 Ultrasonic Pachymeter was used in the measurement of the anterior chamber depth (AD), lens thickness (lt) and axial length (al) in 72 patients with myopia and 18 individuals.