METHOD OF AND DEVICE FOR WEIGHING USEFUL LOAD IN LIFTING VEHICLE IN MOTION Russian patent published in 1999 - IPC

FIELD: mine industry, hoists. SUBSTANCE: device for weighing useful load in lifting vehicle of mine hoist including drive with traction cables passed over guide pulleys has mechanical vibration generators in each lifting vehicle electrically coupled with mechanical vibration radiators connected with cables by acoustic lines located on traction cables in zone of cable fastening on vehicles. Device has mechanical vibration pickups arranged in zone of guide pulleys, vibration mixers, standard generator and two frequency discriminators. Outputs of mechanical vibration pickups are connected with first inputs of their mixers, second outputs of mixers are connected with standard generator, and outputs of mixers are connected with inputs of their frequency discriminators. Device has also empty lifting vehicle mass setter, electromechanical switch, two adapters secured on one of brake cables, one per vehicle, at the level of upper attachment mark of brake cables and electrically connected at this place with input of respective vibration pickup. Adapters are electrically connected through their pickups in parallel with fixed contacts of electromechanical switch whose armature is connected first input of first mixer. outputs of frequency discriminators are connected to their inputs on first adder whose output serves as first input of second adder. Second input of adder is connected to empty lifting vehicle mass setter, and output, to metering device graduated in mass units. brake cables are identical to traction cables and are freely suspended in their upper part at the level of receiving platform. EFFECT: enhanced accuracy and reliability of load weighing. 2 cl, 11 dwg