| 摘要 |
FIELD: devices for controlling movement of motor transport. ^ SUBSTANCE: two-wire inductive loop envelops control zone along perimeter. First output of active element of generator is connected to beginning of one wire, end of which is connected to beginning of other wire and is connected to power circuit 6. Generator of impulses and frequency meter are connected serially. Generator of logical signal is included. Introduced into device are voltage controller, amplitude detector, filtering direct current amplifier, voltage divider, frequency comparator, frequency level set-point block and level correction block. Voltage divider is connected to first input of filtering direct current amplifier. Level correction block is connected to first input of frequency comparator. Frequency level set-point block is connected to first input of level correction block, connected to second input of which are output of frequency meter and second input of frequency comparator. Output of frequency comparator is connected to logical signal generator. First input of voltage controller is connected to end of other wire of inductive loop. Output of voltage generator is connected to input of active generator element, second output of which is connected to input of amplitude detector. First output of amplitude detector is connected to input of impulse generator, while second output is connected to second input of filtering direct current amplifier, output of which is connected to second input of voltage controller. Tracked in device are slow changes of generator frequency as a result of influence of weather conditions. ^ EFFECT: increased resistance to interference, stable generation of signal and reliability. ^ 1 dwg |
