摘要
为了实现工业生产流水线中灌装溶液杂质的在线检测,提高生产检测效率,文中着重研究了基于水听器传感器的在线声波检测技术。通过分析比较在有无固体异物杂质颗粒时灌装容器内的声场频谱分布情况,利用等级相似性系数来定性地判定容器内溶液的杂质颗粒有无情况。采用水听器作为收集容器内声场数据的传感器,具有体积小、线性工作频率范围宽和无水平指向性等特点。主要步骤有水听器采集声场数据、信号滤波放大、数据采集和FFT数据处理等。通过试验得出结论,容器内的固体异物杂质颗粒在溶液中的声场频谱分布中的特征频段范围是15～26.8 k Hz。
In order to achieve the goal of online impurity detection of filling solution in industrial production and improve pro- duction efficiency, the paper focused on the new technology of online acoustic detection. Through the analysis of the sound field spectral distribution in the filling container with and without solid particle impurities, whether there were impurities in the filling container could be determined qualitatively by comparing the data similarity. Hydrophone, with small size, wide range of linear oper- ational frequency and non-horizontal directivity, was used in the experiment as a sensor to collect sound field data in the container. The main steps of the experiment were sound field data acquisition, the filtering and amplification of the signal, data acquisition and FFT data processing.Through the experiments,it can be concluded that the characteristic frequency of solid particle impurities in the solution within the container is from 15 kHz to 26.8 kHz.
出处
《仪表技术与传感器》
CSCD
北大核心
2015年第4期79-83,共5页
Instrument Technique and Sensor
关键词
水听器
杂质声波检测技术
频谱分布
FFT
等级相似性
hydrophone
impurity acoustic detection technology
spectral distribution
FFT
data similarity
