一种矿用皮托管式风速传感器设计

针对传统风速传感器因井下特殊环境常造成超声波探头性能减弱,不能正确反映环境风速值的问题,提出一种矿用皮托管式风速传感器设计方案,详细介绍了其原理及软硬件设计。该传感器采用S型皮托管测量风的压力,利用差压芯片计算差压信号值,并根据电信号、差压信号、风速之间的对应关系求取风速信息。实验结果表明,在0.4～15m/s风速范围内,该传感器测量误差低于±0.2m/s,且具有较好的温度稳定特性、贮存特性和防潮防堵性能。

Design of a Mine-used Air Speed Sensor Based on Pitot Tube

For the problem that traditional air speed sensor always cannot properly reflect value of ambient air speed because underground environment often causes performance degradation of ultrasonic probe,the paper proposed a design scheme of mine-used air speed sensor based on Pitot tube,and introduced principle and designs of hardware and software of the sensor in details.The sensor uses S-type Pitot tube to measure air pressure,uses differential pressure chip to calculate value of differential pressure signal,and calculates air speed according to corresponding relationship among electrical signal,differential pressure signal and air speed.The experimental results show that measurement error of the sensor is less than ±0.2 m/s in air speed range of 0.4～15 m/s,and the sensor has good characteristics of temperature stability,storage,moisture proof and dustproof.