Aiming at the problems existing in the current detection and measurement method of crane brake downward displacement,this paper proposes a detection and measurement method based on acceleration improvement.First of all,the acceleration sensor for each direction is calibrated.Secondly,the acceleration and deflection angle will be fused with complementary filtering to reduce the impact of the wind load on the braking acceleration,and then through the Kalman filtering method to reduce the wire rope jitter interference signals.Finally,use the improved method of division and then the acceleration is integrated in the time domain,to avoid truncation caused by the Fourier transform directly in the frequency domain.Double integration is performed to accurately recognize the instantaneous change of acceleration during the braking uniform descent process,and the accurate braking downward displacement is obtained.The experimental results show that the method is highly accurate and anti-interference ability in the process of detecting and measuring the crane braking downward displacement in the operating environment.
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