摘要
基于超声波传播的声速差原理,即通过测量超声波气流顺向和逆向传播的声速差算出气体的浓度和流量,并采用温度传感器DS18B20进行温度补偿,实现在线实时监测气体中的氧气浓度和流量。实验结果表明,与单一的测量气体流量或浓度的传感器相比,该检测系统可以应用于同时监测气体浓度和流量的场合,具有较低的成本和较高的准确性。
Based on the principle of sound velocity of ultrasonic transmission, that is, by measuring the sound velocity of ultrasonic flow forward and reverse transmission sent to calculate the concentration of the gas and flow, and using temperature sensor DS18B20 for temperature compensation, this paper realized online real-time monitoring of oxygen concentration and gas flow. Experimental results show that with a single measuring gas flow rate or concentration sensor, this test system can be applied to monitor the gas concentration and flow at the same time, it has low cost and high accuracy.
出处
《仪表技术与传感器》
CSCD
北大核心
2014年第11期70-72,75,共4页
Instrument Technique and Sensor
关键词
超声波
时差法
传播时间
氧浓度
气体流量
温度补偿
ultrasonic
time difference method
travel time
oxygen concentration
gas flow
temperature compensating
