CAJ | 학술논문

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0~25 m，误差小于0.2 m/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。
초성파측풍기술구유비접촉、정도고、측량범위엄이급안장방편등우점，괄용우매광정하풍도검측、공업위험기체검측등。기우초성파시차원리，설계료일충기우DSP적심편적초성파식풍속풍향검측의。대순류、역류초성파신호채용상관함수법급빈역변환처리방법，소제배경백조성적영향，제고료시간차적측량정도화처리기운산속도。대배경온도조성적오차진행수정，실현풍속측량범위0~25 m，오차소우0.2 m/s，병실현항도중정반량향풍향측량。통과대량실험화측시，해풍속풍향검측의구유교고적정도화은정도。
Ultrasonic wind measurement technology has an advantages of non-contact, high accuracy, wide measurement range and ease of installation, Suitable for coal mine and duct testing, industrial hazardous gas detection. Based on ultrasonic transit-time principle, We designed a ultrasonic wind speed and direction 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.