摘要
两换能器互易法由于将校准归结到若干电学量的测量,目前是校准高频水听器的主要方法之一。校准水听器过程中,在保证电学量测量精度的情况下,开展了诸多影响因素的研究,主要包括辅助换能器有效直径、声场中心对称性,水听器浸泡时间,水含氧量及衰减修正等引起的影响研究等。研究表明,在准确计算出衍射修正参数G1、平均效应修正参数G2的前提下,辅助换能器有效直径、衰减修正等引入的影响较大,而声场的非中心对称性、水听器浸泡时间及水含氧量带来的影响较小。结果表明,所建立的高频水听器校准装置,在0.5～15 MHz的频率范围内,校准结果与英国国家物理实验室的校准结果非常接近,结果准确可靠。
Abstract
Two-transducer reciprocity method is one of the primary method for high-frequency hydrophone calibration because of its dependence only on electric quantities. Several factors are studied except the electric quantities, such as the effective radius of the auxiliary transducer, acoustic field symmetry, soaking time, oxygen content and attenuation correction. Experiment shows that, if the diffraction value G1 and averaging factor G2 is calculated precisely, the effective radius and attenuation correction will introduce rather large uncertainties, the influence of field symmetry, soaking time and oxygen content can be neglected. Experiment data show that, the calibration results between 0.5～15 MHz are very close to the results of NPL by laser methods.
关键词
计量学 /
高频水听器 /
两换能器互易法 /
声压灵敏度
Key words
Metrology /
Reciprocity method;Two-transducer reciprocity method;High-frequency hydrophone;Pressure sensitivity calibration
杨平,冯延强,祝海江.
两换能器互易法校准高频水听器若干影响因素的研究[J]. 计量学报. 2012, 33(2): 144-148 https://doi.org/10.3969/j.issn.1000-1158.2012.02.10
YANG Ping,FENG Yan-qiang,ZHU Hai-jiang.
Study of the Influencing Factors in the High-frequency Hydrophone Calibration Based on the Two-transducer Reciprocity Method[J]. Acta Metrologica Sinica. 2012, 33(2): 144-148 https://doi.org/10.3969/j.issn.1000-1158.2012.02.10
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
［1］Bajram Zeqiri, Nigel D Lee. BIPM/CIPM Key Comparison CCAUV.U-K2:Comparison of 1mm hydrophone calibrations in frequency range 1 MHz to 15 MHz［R］. NPL Report DQL-AC RES 013,2005.
［2］国际电工委员会 IEC 62127-2—2007, Calibration for ultrasonic fields up to 40 MHz［S］. 2007.
［3］国家质量技术监督局 GB/T 15611—1995, 声学 高频水听器校准 ［S］. 1995.
［4］国际电工委员会 IEC 60866—1987, Characteristics and calibration of hydrophones for operation in the frequency range 0.5 MHz to 15 MHz ［S］. 1987.
［5］Von B Fay.Numerische Berechnung der Beugungsverluste im Schallfeld von Ultraschallwandlern ［R］.ADD303633, 1976.
［6］Beissner K.Exact Integral Expression for the Diffraction Loss of a Circular Piston Source ［J］. ACUSTICA,1981, 49（1）:212-217.
［7］国际电工委员会 IEC 61161—2006, Power measurement-Radiation force balances and performance requirements ［S］.2006.
基金
质检公益性行业科研专项（10-4 高频水声计量标准的建立）
PDF(994 KB)
