BOOM CRANE OVERLOAD SAFEGUARD Russian patent published in 1995 - IPC

FIELD: load-lifting boom cranes. SUBSTANCE: boom crane overload safeguard has load weight pickup 1, boom reach pickup 2, wind velocity pickup 3 connected with first, second and third inputs of first multiplexer 4 whose output is connected with input of analog-to-digital converter 5. Outputs of analog-to-digital converter 5 are connected to inputs of first and second parallel registers 6 and 7, respectively. Output of first register 6 is connected with first group of address inputs of fixed memory 10, and second group of address inputs of fixed memory 10 is connected with output of second multiplexer 9. First information input of multiplexer 9 is connected with output of second register 7, and second information input, with second output of control device 8. Outputs of fixed memory 10 are connected with inputs of display unit 11 and crane actuators control unit 12. First group of outputs of control device 8 is connected with switching inputs of multiplexer 4, triggering inputs of analog-to-digital converter 5, write inputs for registers of display unit 11 and inputs of crane actuators control unit 12. Second group of outputs of control device is connected with second information input of second multiplexer 9, and third group, with write inputs of first and second registers 6,7 and switching input of second multiplexer 9. EFFECT: enhanced operation reliability. 2 dwg