一、概还目前广泛应用的流量计,从原理上看都是测体积流量的,随着工艺的发展及自动化水平的提高,迫切需要质量流量测量技术。现在实际使用的热丝式气体质量流量计,是利用容积式流量计,配装在线密度计,二者示值的乘积就是所要求的质量流量。甩掉密度计后,通常采用的手段是进行温度压力补偿,目前比较成熟的数学模 First, the general also widely used flowmeter, from the principle of view is to measure the volume flow, with the development of technology and automation level, the urgent need for mass flow measurement technology. Now the actual use of hot wire gas mass flow meter, is the use of positive displacement meter, equipped with online densitometer, the product of the two shows the required mass flow rate. Dumped off the densimeter, the commonly used means is to carry out temperature and pressure compensation, the current mathematic model