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第 41 卷 第 1 期 摩 擦 学 学 报 Vol 41 No 1
2021 年 1 月 Tribology Jan, 2021
DOI: 10.16078/j.tribology.2020054
基于超声波反射系数相移的油膜厚度
测量方法研究
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贺彦博 , 高天雯 , 郭 奥 , 乔天旭 , 何晨晞 , 王国水 , 刘晓楠 , 杨晓涛 1*
(1. 哈尔滨工程大学 动力与能源工程学院，黑龙江 哈尔滨 150001;
2. 哈尔滨工程大学 物理与光电工程学院，黑龙江 哈尔滨 150001)
摘 要: 超声波液相厚度测量技术已经在柴油机气缸油膜测量领域中得以验证，并得到了一定的应用. 然而，当油膜
厚度变化尺度较大时，常规谐振模型与弹簧模型之间存在较大的测量盲区，使超声波测量技术的应用受到较大程
度的限制. 基于超声波反射系数相移的油膜厚度测量方法可突破两种模型在大尺度油膜厚度测量方面的局限性，拓
展超声波油膜厚度测量范围. 通过开展超声波反射系数相移机理研究，首次建立油膜两侧介质声阻抗相同时的直接
求解方法；搭建油膜厚度超声波反射系数相移测量系统，利用单一中心频率对10~90 μm的油膜厚度展开测量，测量
厚度与设置厚度具有很好的一致性，从理论和实验角度证明基于超声波反射系数相移的油膜厚度测量方法在大尺
度油膜厚度测量方面的适用性.
关键词: 油膜厚度; 超声波测量; 反射系数相移; 大尺度; 直接求解
中图分类号: TH117.2 文献标志码: A 文章编号: 1004-0595(2021)01–0001–08
Lubricant Film Thickness Measurement Based on Ultrasonic
Reflection Coefficient Phase Shift
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HE Yanbo , GAO Tianwen , GUO Ao , QIAO Tianxu , HE Chenxi , WANG Guoshui ,
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LIU Xiaonan , YANG Xiaotao 1*
(1. College of Power and Energy Engineering, Harbin Engineering University, Heilongjiang Harbin 150001, China
2. College of Physics and Optoelectronic Engineering, Harbin Engineering University,
Heilongjiang Harbin 150001, China)
Abstract: Ultrasound has been applied to measure the lubricant film thickness between the piston assembly and cylinder
wall in recent years. However, when the lubricant film thicknesses vary in a wide range, there is a blind zone between
the resonant model method and spring model method, which greatly limits the application of ultrasound. In this paper,
the lubricant film thickness measurement method based on the ultrasonic reflection coefficient phase shift was studied to
overcome the limitation of two conventional methods. The principle of the ultrasonic reflection coefficient phase shift
method was analyzed, then an accurate method to solve lubricant film thicknesses directly was proposed for the first
time, with the condition that the acoustic impedance of media on both sides of the lubricant film were equal. A lubricant
film thickness measurement system was used to measure the film thicknesses from 10 to 90 μm by single center
frequency. The measured results were in good agreement with the set thicknesses, which demonstrated that the lubricant
film thickness measurement method based on the ultrasonic reflection coefficient phase shift can measure the lubricant
film thicknesses in a wide range.
Key words: lubricant film thickness; ultrasonic measurement; reflection coefficient phase shift; wide range; direct
solution
Received 4 April 2020, revised 17 July 2020, accepted 22 July 2020, available online 28 January 2021.
*Corresponding author. E-mail: yangxiaotao1985@163.com, Tel: +86-13674675869.
This project was supported by Marine Low-Speed Engine Project (MC-201501-D01-03).
船用低速机工程项目(MC-201501-D01-03)资助.
