大气颗粒物浓度是大气污染监测中的一项重要指标。大气中的颗粒物，特别是PM10 及其以下颗粒物浓度的监测一直是国内外专家关注的问题。提出一种实时在线测量颗粒物质量浓度的监测方法，该方法采用振动原理，替代了传统的离线监测技术。经过计算分析证明了这种方法具有可行性，并且提高了监测工作的实时性和正确性。关键词：大气颗粒物 振动原理 在线监测Abstract：Airborne particulate matter concentration is one of key parameters in outdoor air monitoring. Monitoring of airborne particulate matter concentration has been the focus of overseas and domestic experts\' attention，especially in monitoring of PM10（particulate matter generally defined as all particles equal to and less than 10 microns in aerodynamic diameter）. A method of real-time online monitoring of airborne particulatematter concentration is proposed. It replaces traditional offline monitoring by using the principle of vibration. Computational analysis showsthat this method has the feasibility of application and improves real-time ability and accuracy.Keywords：Airborne particulate matter Principle of vibration Online monitoring