火电厂一次风速及煤粉浓度的数据采集系统设计

Data acquisition system of primary air velocity and coal dust concentration in thermal power plant

摘要:

探讨用于火电厂一次风管道风速及煤粉浓度在线监测系统的高速数据采集方法与相应的实现技术,可为一次风速及煤粉浓度的测量提供可靠的数据。根据要检测的电厂锅炉一次风管道气固两相流的特性,在基于微波法测量一次风速及煤粉浓度方案的基础上,设计了用于一次风速及煤粉浓度检测的数据采集系统。该采集系统使用ST公司的Cortex M4核心的ARM处理器和高精度、双极性、多路同步ADC采集转换器,并使用百兆以太网通信芯片把采集的数据传送到上位机。实现了四路同步数据的采集、传输及存储,经试验验证,能够稳定的进行数据采集。只需对该系统稍加改动,即可实现8通道同步采集。适用于多数数据采集的场合,具有很好的应用前景。

Abstract:

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.