MODIFICATION OF UNDERGROUND LOOP REVERSIBLE COUNTER

Following the problem with the digital controller of the underground loop of the works' imported Φ114mm welded-pipe line that counting deviation occurred in the reciprocating vibration of the strip, the author analyses working theory of the said counter. It is concluded that the said counting deviation can be eliminated and the counter's operation effectiveness improved by means of adding counting pulse restricting circuits to filter off the ineffective counting pules.