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To explore the method and the corresponding implementation technology of on-line monitoring system of high speed data acquisition,which is used in power plant’s wind velocity and pulverized coal concentration measure,it can provide reliable data for the detection that wind velocity and pulverized coal concentration of primary air. According to the main characteristics of pulverized coal concentration and wind velocity for the boiler of primary air, Based on the method of measuring the velocity of a coal dust and the concentration of coal powder by microwave method, Designed the data acquisition system for a wind velocity and pulverized coal concentration detection.The acquisition system uses ST's architecture (M4 core ARM processor) and high precision, dual polarity, multi-channel synchronous converter ADC acquisition chip (AD7606),and uses the Ethernet communication chip of 100M to sends the data to the PC.which implements the four-way synchronous data acquisition , transmission and storage, It has been verified by test, can be stable for data collection. Only need to change the system for a little bit, 8 channel synchronization acquisition can be realized.It Suitables for most of the data acquisition, and has the very good application prospect.