Hazard forecasting techniques implementation in crane safety instruments using a crane anemometer

Abstract

Introduction. This article describes an algorithm developed by the authors for the operation of a crane anemometer that measures the gust rate and average wind speed and determines the predicted wind speed on the basis of it. The main part. The main influencing parameters and their measurement intervals are defined for the construction of the anemometer algorithm. The method of calculation of gust velocity and average wind velocity from the data of the pulse sensor of the helicopter anemometer is presented. The method of wind speed forecasting based on the construction of an extrapolation function is given.Results. An anemometer program algorithm with extended capabilities relative to existing analogues has been developed. The instrument not only captures the hazard at the moment, but also predicts its future development. On the basis of the analysis of wind dynamics studies, a table has been compiled of the levels of the determined parameters (gust rate, average speed and projected average wind speed) and the signals given to the operator of the crane. For each type of signal, the value of the removal delay is defined.Conclusions. ZAO KROS Engineering and Technical Centre has made a prototype anemometer using the principles described in this article. The device meets all requirements of the regulatory and technical documentation. Further work on the improvement of the algorithm of its work will make it possible to increase the safety of technological processes carried out with the use of elevated structures.

Configuring the algorithm of the load limiter with intermediate threshold

“…The developed technique differs from the algorithm [7] by the requirement to expand the number of sources of primary information used by RCL, speed sensor, which is justified by the need to calculate the characteristic of the force in the rope suspension from its deformation and the path traveled during the response time.…”

“…In the work of N. Michalczyk [7] an attempt to develop an algorithm for tuning the intermediate threshold was made. The disadvantage of the developed method is the prediction of load by response time, which does not take into account the rigidity of the mechanical characteristic of the electric motor.…”