In the ultrasonic wind measurement system using ravel-time-difference method

the precision of wind velocity measurement is greatly affected by the precision of time delay estimation

the precision of ultrasonic transducer distance.Requiring a more accurate estimation of time delay when the distance accuracy is fixed.In this regard

a LMS adaptive time delay estimation algorithm is adopted based on weight-coefficient detection

in order to achieve a high precision time delay estimation.Computer simulation and practical tests show that the estimation accuracy of the algorithm meet the requirements of ultrasonic wind measurement system.This algorithm can be used for monitoring the low-level wind field at airport regional.