超声纵波换能器用于平测时的测距修正方法研究

doi:10.3969/j.issn.1000-1158.2021.06.08

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Abstract The method of determining the correction distance when ultrasonic longitudinal wave transducers are used in indirect transmission arrangement is discussed. Firstly, according to the theory of elastic wave, the actual physical meaning of using the indirect transmission arrangement to measure wave velocity instead of the direct transmission arrangement is analyzed. Secondly,the actual propagation distance of the two arrangements are analyzed and transit times of the two arrangements are compared through a designed cutting-measurement experiment on a concrete specimen. Lastly, linear regression equation is obtained from the experimental data of the indirect transmission arrangement and the least square method is proposed to calculate the correction distance for the indirect transmission arrangement. The experiment results show that the difference between the wave velocity calculated with the correction distance and the wave velocity measured with direct transmission arrangement is less than 2%. The conclusion is the indirect transmission arrangement can be used to measure wave velocity instead of the direct transmission arrangement under certain condition. However, the correction distance should be determined from experiments, and measurement parameters in the experiments should be kept in practice to ensure the effectiveness of the correction distance.

Key words： metrology distance correction indirect transmission actual propagation distance ultrasonic longitudinal wave transducer

Received: 30 June 2020 Published: 23 June 2021

PACS:	TB92
	TB95

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	Articles by authors
	YANG Yu
	BAO Ting
	WANG Yi
	XU Hao

Cite this article:

YANG Yu,BAO Ting,WANG Yi, et al. Study on Determining Correction Distance of Ultrasonic Longitudinal Wave Transducers Used in Indirect Transmission Method[J]. Acta Metrologica Sinica, 2021, 42(6): 738-744.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.06.08 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I6/738

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