Page 116 - 《应用声学》2023年第2期

第 42 卷 第 2 期 Vol. 42, No. 2
2023 年 3 月 Journal of Applied Acoustics March, 2023

⋄ 研究报告 ⋄

扬声器激励次声频校正器的设计和性能分析

殷 昊 1 刘 伟 1† 冯秀娟 2 庞新良 1

(1 军事科学院防化研究院 北京 102205)
(2 中国计量科学研究院 力学与声学所 北京 100029)

摘要：为克服现有主流型活塞式次声校正器低频端漏气误差增大的缺点，该文提出基于扬声器激励、薄膜密封
结构作为标准次声源，实现了一种新型次声校准装置。该装置采用成熟化技术方案和模块化设计，具有组装方
便、体积小、重量轻和工作稳定等优点。目前在校准频率 0.1∼20 Hz 范围内，合成标准不确定度在 0.2 dB 以内，
扩展不确定度优于 0.4 dB (k = 2)。利用该装置分别对 MB3a 型和自研次声传感器进行了校准，前者的校准结
果与产品技术参数一致，后者与中国计量科学研究院的校准结果相近 (误差小于 7.5%)，测试结果表明该装置
可用于次声传感器的校准。值得注意的是，该校正器可能做到低端 0.01 Hz 或更低的频率的绝对校正，该文展
望了扬声器激励次声校正器发展前景。
关键词：次声传感器；校准；声压灵敏度；活塞发声器
中图法分类号: TB522; TP212 文献标识码: A 文章编号: 1000-310X(2023)02-0304-08
DOI: 10.11684/j.issn.1000-310X.2023.02.013

Design and performance analysis of the speaker excitation infrasonic calibrator

YIN Hao 1 LIU Wei 1 FENG Xiujuan 2 PANG Xinliang 1

(1 Chemical Defense Institute, Academy of Military Sciences, Beijing 102205, China)
(2 Division of Mechanics and Acoustics, National Institute of Metrology, Beijing 100029, China)

Abstract: In order to overcome the disadvantage of increasing the air leakage error at the low frequency
end of the existing mainstream piston infrasonic calibrator, a new infrasonic calibration device is proposed
based on the speaker excitation and thin film sealing structure as the standard infrasonic source. The device
adopts mature technical solutions and modular design, with advantages of convenient assembling, small size,
light weight and stable operation. Currently, in the calibration frequency range of 0.1–20 Hz, the synthetic
standard uncertainty is within 0.2 dB, and the extended uncertainty is better than 0.4 dB (k = 2). The device
calibrated the MB3a and self-developed infrasonic sensors. The calibration results of the former are consistent
with the product technical parameters, while the latter is similar to the calibration results of the Chinese
Academy of Metrology (the error is less than 7.5%). The test results show that the device can be used for the
calibration of the infrasonic sensor. It is noteworthy that this calibrator may achieve the absolute correction of
low-end 0.01 Hz, or even lower frequencies, and this paper looks ahead to the development of speaker excitation
infrasonic calibrator.
Keywords: Infrasonic sensor; Calibration; Pressure sensitivity; Pistonphones

2021-12-07 收稿; 2022-03-17 定稿
作者简介: 殷昊 (1995– ), 女, 云南曲靖人, 硕士研究生, 研究方向: 核爆效应现象学及探测技术。
† 通信作者 E-mail: lw_email@126.com