基于MSP430罗茨气体流量积算仪的设计与实现

针对目前工业现场天然气计量情况.设计基于16饽嵌入式微处理器MSP430F157为核心的罗茨流量积算仪.采用非线性校正算法实现对流量传感器非线性特征的校正,扩大流量积算仪的量程比:采用多周期测频法,提高传感器输出信号频率测量的精度;通过引入气体压缩因子,修正流量补偿计量公式.积算仪能够更精确地实时温压补偿.文中详细介绍了积算仪的硬件和软件设计方案,经测试和实际运行表明,该流量积算仪稳定可靠,测量精度高.量程比宽,具有一定的实用价值.

Design and Realization of Roots Gas Flow Accumulator Based on MSP430

The Roots gas flow accumulator was designed in need of increasing the accuracy of natural gas measurement in practice,by using MSP430F157 16-bit as the intelligent central controller.Nonlinear correction algorithm is implemented to correct the nonlinear characteristics of the flow sensor,which improves the ratio of measuring range.Multi-cycle frequency method increases the accuracy of the signal frequency measurement.By introducing the gas compressibility factor and amending flow measurement compensation fo...