摘要
超声波测风技术具有非接触、精度高、测量范围广以及安装方便等优点，适用于煤矿井下风道检测、工业危险气体检测等。基于超声波时差原理，设计了一种基于DSP的芯片的超声波式风速风向检测仪。对顺流、逆流超声波信号采用相关函数法及频域变换处理方法，消除环境白噪声的影响，提高了时间差的测量精度和处理器运算速度。对环境温度造成的误差进行修正，实现风速测量范围O-25m，误差小于O．2m／s，并实现巷道中正反两向风向测量。通过大量实验和测试．该风速风向检测仪具有较高的精度和稳定度。
Ultrasonic wind measurement technology has an advantages of non-contact, high accuracy, wide measurement range and ease of installation, Suitable for eoal mine and duct testing, industrial hazardous gas detection. Based on ultrasonic transit-time principle, We designed a ultrasonic wind speed and dirdction detector based on DSP. Using correlation function method and frequency domain transform processing methods In the case of Downstream, upstream ultrasonic signal, eliminate the effect of such noise, improve the measurement accuracy and the time difference processor speed. The error caused by the ambient temperature be eliminated, achieve a speed measuring range 0-25 m, the error is less than 0.15 m/s, and realizes the wizard to measure both positive and negative direction. Through a lot of experiments and testing, the wind speed and direction detector has high accuracy and stability.
出处
《电子设计工程》
2015年第2期22-24,27,共4页
Electronic Design Engineering
关键词
风速风向
DSP
相关函数
傅里叶变换
wind speed and direction
DSP
correlation function
fourier transform
