| 摘要 |
FIELD: electric engineering, in particular, automatic control of reverse electric drives of long reciprocal- movement conveyor belts. SUBSTANCE: device has movement pulse detector 1, which output is connected to counting input of binary counter 2. In addition device has unit 3 which generates signals for braking, stopping and switching-on electric drive 4, DV flip-flop 5, AND gate 6 which is based on light-emitting diodes 7-9. In addition device has two isolating diodes 11 and 12 which provide OR gate, as well as N-digit decimal counter 13, which decimal outputs are connected to corresponding input of AND gate 6 through switches 17-19 which number conforms to number of digits. Output of AND gate 6 is connected to C input of DV flip-flop and through diode 11 to R inputs of all counters. Inverting V-input of DV flip- flop 5 is connected to output of initial setting of unit 3 and to anode of diode 12 which cathode is connected to counting C-input of N- digit decimal counter 13. Direct and inverse outputs of DV flip-flop 5 are connected to control inputs of unit 3 which generates signals for braking, stopping and switching-on electric drive 4. Inverse output of DV flip-flop is also connected to its D input. EFFECT: increased absolute value of positioning precision, increased field of application. 2 dwg2
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