| 摘要 |
FIELD: transport. ^ SUBSTANCE: group of inventions refers to control devices of supplied electric power in order to prevent ice formation or to remover snow/ice from structural member surface. In the method the supply of power us controlled by means of controller which is operated on the basis of values of physical parameters which are measured by means of transmitters located on structural member and on the basis of preceding measurement data referring to snow or ice conditions. Input data is temperature of structural member, amount of snow/ice on structural member, air temperature, wind velocity, precipitation, speed of structural member and the corresponding vibrations. The above input data is compared to the stored data of preceded measurements by means of controller. After comparison the controller calculates by using the defined algorithm the required power, as well as required values of current load and frequency. Frequency influences the temperature change time constant of structural member surface. Then, controller supplies start or stop signals to power supply equipment. After that, controller modifies the stored data with new data of values of parameters, which are the consequence of current snow/ice state on structural member in compliance with pre-set sequence. ^ EFFECT: achieving optimum output values of power required to prevent/remove ice/snow from structural member surface. ^ 6 cl, 3 dwg |
