| 刘柯源,王月兵,郭世旭,赵鹏.基于溢流环换能器液腔的水听器校准系统[J].声学技术,2023,42(3):404~408 |
| 基于溢流环换能器液腔的水听器校准系统 |
| Hydrophone calibration system based on liquid cavity of overflow ring transducer |
| 投稿时间：2021-12-21 修订日期：2022-03-08 |
| DOI：10.16300/j.cnki.1000-3630.2023.03.021 |
| 中文关键词: 声学 低频校准 溢流环换能器液腔 比较法 |
| 英文关键词: acoustics low frequency calibration overflow ring transducer's liquid chamber comparison method |
| 基金项目:国家自然科学基金青年基金项目（11904346）；国家管网集团科技项目（CLZB202108）；国防军工计量“十三五”科研计划项目（JSJL2018207B007）。 |
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| 中文摘要: |
| 针对溢流环换能器液腔振动表现出的优秀低频特性，提出利用溢流环换能器液腔内部声场进行低频校准的校准方法。首先分析了溢流环换能器液腔特性，并在现有刚性罐体的基础上，构造出了一套无须激振台，以溢流环换能器为低频声源，溢流环换能器液腔为两端开口振动液柱的低频比较法校准系统。通过实验测量确定了液柱高度为15 cm处的圆心位置为最佳的比较法测量点，实验测试该点在100~1 400 Hz频段的径向声压变化不超过5%。对Ф 20 mm球型水听器进行比较法测量，在100~1 000 Hz频段的测量结果与标准校准结果最大偏差为0.8 dB，测量不确定度为1 dB。结果表明，以溢流环液腔为基础构造的低频校准系统是可行的。 |
| 英文摘要: |
| Due to the excellent low-frequency characteristics of the liquid cavity vibration of the overflow ring transducer, a calibration method using the sound field inside the liquid cavity of the overflow ring transducer is proposed in this paper. Firstly, the characteristics of the liquid cavity of the overflow ring transducer in rigid cavity are analyzed. Based on existing rigid tank, a calibration system without excitation platform is constructed by using the lowfrequency comparison method, in which, the overflow ring transducer is taken as the low-frequency sound source and the overflow ring liquid cavity is taken as the vibrating liquid column with openings at both ends. Through measurements, it is determined that the center position of the liquid column with a height of 15 cm is the best measurement point for the comparison method, and the change of radial sound pressure at this point is no more than 5% at 100-1 400 Hz. A spherical hydrophone of Ф20 mm is calibrated by the comparison method. Within 100-1 000 Hz, the maximum deviation between the measurement result and the standard calibration result is 0.8 dB, and the measurement uncertainty is 1 dB. The results show that the low frequency calibration system based on the overflow ring liquid cavity is feasible. |
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