摘要
在复杂的工业环境中,接触式振动传感器的安装往往受到诸多限制,如火电厂主蒸汽管道的高温环境以及设备布局空间受限等问题。针对应用需求,提出一种基于激光光斑位移的非接触式振动频率测量方法。首先,构建光学反射模型,分析激光光斑位移对探测器靶面重叠面积的影响,并结合光束能量分布计算总光强信号。随后,采用快速傅里叶变换(fast Fourier transform,FFT)对信号进行频域分析,以验证该方法测量振动频率的可行性。基于此,搭建光学测量系统,对振动源的频率进行实验测量,并与传统压电式振动传感器的测量结果进行对比。实验结果表明,在0~500 Hz频率范围内,该方法能够准确识别振动的主要频率成分,最大测量误差仅为0.2442 Hz。通过集成光开关或分束器,该方法可扩展至多点测量,进一步满足工业场景的分布式监测需求。
In complex industrial environments,the installation of contact-based vibration sensors is often subject to various constraints,such as the high-temperature conditions of main steam pipelines in thermal power plants and the limited space for equipment layout.To address these application challenges,this paper proposes a non-contact vibration frequency measurement method based on laser spot displacement.First,an optical reflection model is established to analyze the effect of laser spot displacement on the overlapping area of the detector′s target surface.The total light intensity signal is then calculated based on the beam energy distribution.Subsequently,fast Fourier transform(FFT)is applied for frequency domain analysis to verify the feasibility of using this method for vibration frequency measurement.Based on this approach,an optical measurement system is constructed to experimentally measure the vibration source′s frequency and compare the results with those obtained from a traditional piezoelectric vibration sensor.Experimental results demonstrate that within the frequency range of 0~500 Hz,the proposed method can accurately identify the main frequency components of vibration,with a maximum measurement error of only 0.2442 Hz.By integrating optical switches or beam splitters,the method could be extended to multipoint measurements,further meeting the need for distributed monitoring in industrial scenarios.
作者
温冬阳
张涛
钟爱民
孙恩尧
汪步斌
Wen Dongyang;Zhang Tao;Zhong Aimin;Sun Enyao;Wang Bubin(Xinjiang Zhunneng Investment Co.,Ltd.,Changji 831100,XinJiang,China;School of Energy and Environment,Southeast University,Nanjing 211189,Jiangsu,China)
出处
《应用激光》
北大核心
2025年第11期176-183,共8页
Applied Laser
基金
江苏省碳达峰碳中和科技创新专项资金项目(BT2024013)。
关键词
激光光斑
位移
振动
频率
非接触式
laser spot
displacement
vibration
frequency
non-contact
