FIELD: mechanical engineering; loading-lifting cranes.
SUBSTANCE: proposed group of inventions relates to controls and safeguards of load-lifting cranes. Method provides measuring and/or checking operating parameters of load-lifting crane characterizing load, geometry, conditions or modes of operation and conversion of measured and/or checked parameters into serial code and their transmission by multiplexed communication line with addition of identification or address of module. At least in one module at least two operating parameters of load-lifting cranes are measured and/or checked and converted into serial code, combined reception and combined transmission of serial digital signals by multiplexed communication line with use of one identification or address of module are provided. System implementing the method contains at least two separate modules being electronic units and/or transducers, for instance, control and indication units, boom tilting angle and length transducers, force or pressure transducers. At least two of them are connected through multiplexed communication line. Each of combined modules contains microcontroller, driver or transceivers and information measurement or information control circuit, made for measuring and/or checking operating parameter of load-lifting crane. Outputs of said circuit are connected with inputs of microcontroller, and one of primary converters of operating parameters of load-lifting crane is connected to its input. Microcontroller is made for reception, processing and transmission of serial digital signals, its inputs/outputs being connected through driver of transceiver with multiplexed communication line. In at least one of modules at least one of primary converters of operating parameters of load-lifting crane is connected to input of information measurement or information control circuit in addition. Said circuit of module is made for measuring and/or checking of at least two measured and/or checked operating parameters of load-lifting crane, and microcontroller is made for combined reception, combined processing and combined transmission of serial digital signals by multiplexed communication line with use of one identificator or address of module.
EFFECT: improved reliability of protection of load-lifting crane owing to high-speed response and accuracy of operation of safety system.
9 cl, 1 dwg
