초록 ▼

A multimode electronic brake monitor system for use with power driven machinery having an absolute shaft encoder input for determining the position of a rotating or reciprocating member of the machinery, wherein both upstroke and downstroke preset allowable braking times are provided. In a normal mo

A multimode electronic brake monitor system for use with power driven machinery having an absolute shaft encoder input for determining the position of a rotating or reciprocating member of the machinery, wherein both upstroke and downstroke preset allowable braking times are provided. In a normal mode of operation, the brake monitor system monitors each and every cycle of operation of the associated power driven machine and provides a precise measurement and a direct reading display of machine braking time in milliseconds. Automatic shutdown of the monitored power driven machine occurs should the measured braking time exceed either of two preset allowable braking times. In a thumbwheel mode, the brake monitor system is used to initiate a braking sequence at a presettable machine shaft angle whereupon either braking times in milliseconds or in degrees of shaft angle are measured and displayed.

대표청구항 ▼

An electronic brake monitor for determining when the braking time of a machine having a reciprocating member and means for braking said member and means for initiating said braking means exceeds at least one of a plurality of preset braking times, comprising: (a) encoder means coupled to said member

An electronic brake monitor for determining when the braking time of a machine having a reciprocating member and means for braking said member and means for initiating said braking means exceeds at least one of a plurality of preset braking times, comprising: (a) encoder means coupled to said member for providing an output corresponding to the absolute position of said member; (b) a generator for producing clock pulses; (c) a digital counter connected to said generator and enabled to accumulate clock pulses in response to said initiating means; (d) preset means responsive to said encoder output and said initiating means for establishing at least a first and second mutually independent preset braking times, and for selection of a first preset braking time when said member is moving in an upstroke direction and for selection of a second preset braking time when said member is moving in a downstroke direction; (e) memory means connected to said counter and responsive to changes in said encoder output for accepting the accumulated contents of said counter; (f) comparator means connected to said preset means and to said memory means for producing an alert condition when the contents of said memory means exceeds said selected preset braking time.