A Sound Velocity Measurement System for Thin Steel Sheet Based on Ultrasonic Interferometry

Crack universally existing underground is an important kind of pores. In order to study the elastic wave propagation in fractured medium through experiment, a new method to make artificial core with certain cracks using oil well cement and camphor sheet or thin steel sheet is put forward. Geometric parameters of the crack, such as shape, size and aspect ratio, are approximately equal to that of camphor sheet or thin steel sheet. Using the thin steel sheet to make crack can be more easy and accurate to control the crack angle than using camphor sheet. The crack opening scales at millimeters. The aspect ratio of cracks formed by camphor sheet ranges from 1.4 to 8, and aspect ratio of cracks formed by thin steel sheet ranges from 2.5 to 70. This method is proved simple and feasible by experiment practice, which can provide artificial cores with certain crack for acoustic wave propagation study.

Download Full-text

Development of Thin Steel Sheet for Ultra-Right 2-Piece Can.

Materia Japan ◽

10.2320/materia.38.245 ◽

1999 ◽

Vol 38 (3) ◽

pp. 245-247

Author(s):

Hidekuni Murakami ◽

Koji Hashimoto ◽

Seiichi Tanaka ◽

Tetsurou Takeshita ◽

Hirokazu Yokoya

Keyword(s):

Steel Sheet ◽

Thin Steel Sheet ◽

Thin Steel

Download Full-text

Vibration Suppression System of the Running Thin Steel Sheet

The Proceedings of Conference of Chugoku-Shikoku Branch ◽

10.1299/jsmecs.2017.55.k1110 ◽

2017 ◽

Vol 2017.55 (0) ◽

pp. K1110

Author(s):

Ryuzo Omura ◽

Koici Oka ◽

Akinori Harada

Keyword(s):

Steel Sheet ◽

Vibration Suppression ◽

Thin Steel Sheet ◽

Thin Steel ◽

Suppression System

Download Full-text

Research of the High-Precision Dual-Channel Sound Velocity of Seawater Measurement System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.668-669.940 ◽

2014 ◽

Vol 668-669 ◽

pp. 940-943

Author(s):

Bao Feng Zhang ◽

Zi Ming Xie ◽

Zhi Wei Li ◽

Jun Chao Zhu

Keyword(s):

Sound Velocity ◽

High Precision ◽

Measurement System ◽

Velocity Measurement ◽

Time Interval ◽

Interval Measurement ◽

Dual Channel ◽

Precision Time ◽

Time Interval Measurement ◽

Time Of Flight Method

For single channel sound velocity measurement system accuracy was generally not high,a high-precision dual-channel sound velocity of seawater measurement system was designed.Based on ultrasonic speed of sound measurement in seawater with time-of-flight method,the system used ARM microcontroller to combine with high-precision time interval measurement chip,and the sound velocity measurement was translated into distance and time measurement. Then the influence of the time delay of the system was eliminated by method of difference.The paper introduced the modules of the system,and the high-precision time interval measurement method as the key technology of time-of-flight method for the velocity measurement system was expounded.It wasproved by experiment that the measurement accuracy of the system on the velocity reached 0.019m/s.

Download Full-text