Patent ID: 10107718

Abstract:
Sensors monitor parameters of a machine and generate sensor signals that are transmitted to a plurality of signal analyzers. A microprocessor in each signal analyzer analyzes a sensor signal and generates an event signal when the sensor signal meets predetermined criteria indicating that the machine is operating abnormally. A circular buffer is connected to receive and record data corresponding to a sensor signal. When the signal analyzer generates an event signal and a capture trigger is created, the data from the circular buffer is transmitted and stored in the nonvolatile memory. Both pre-event data and post-event data are stored in the nonvolatile memory in a selected ratio of pre-event and post-event data. Data lines connect each signal analyzer in a group of signal analyzers, and data corresponding to each signal analyzer in the group is stored into the nonvolatile memory when an event signal is created by a signal analyzer in the group. The signal analyzers may communicate with an external computer that may receive the event signals, analyze the event signals, issue capture signals and control the amount of pre-event data and post-event data that is stored in the nonvolatile memory.