Reciprocating machinery monitoring system and method

A system for monitoring at least one reciprocating machine having a crankshaft and at least one cylinder, comprising:

• at least one magnetic pickup sensor for monitoring a movable metallic component of the at least one reciprocating machine, the at least one magnetic pickup sensor being in communication with at least one processor configured to determine an angular position of the crankshaft based on data received from the magnetic pickup sensor;
• at least one sensor for monitoring the at least one cylinder, the sensor being in communication with at least one processor configured to measure at least one signal from the at least one sensor;
• and
• at least one computer configured to, either automatically or in response to a user commend, select at least one subset of potential crankshaft angular positions, calculate at least one statistic associated with the at least one subset of possible crankshaft angular positions based least partially on data from the at least one sensor, and communicate to a user an indication regarding how often the at least one statistic exceeded at least one predetermined threshold during a monitoring period;
• wherein the at least one sensor comprises at least one piezoelectric acoustic emission sensor configured to detect sound waves that travel in the material of the at least one reciprocating machine;
• wherein the indication comprises a change in a gradient of a representation on a user interface associated with the at least one subset of possible crankshaft angular positions for a predetermined valve.