Abstract: A monitoring system may be used to monitor machining of a workpiece. In some embodiments, the monitoring system may use an acoustic emission sensor to measure acoustic emissions from the machining and generate an acoustic emission signal. The acoustic emission signal may be compared to a master signal using several techniques, such as a Multi-Zone Strategy method. The Multi-Zone Strategy method may comprise generating a plurality of zones of the measured signal and generating a plurality of zones of a master signal to create a plurality of measured and master signal levels and thresholds. A measured signal level for each zone may be compared to a master signal level for each zone to determine whether the measured signal level differs from the master signal level by no more a predetermined percentage, which acts as a threshold for triggering notification of out of tolerance zones.

Abstract: A method of optical bi-direction communication between mobile communication devices, wherein each mobile communication device has data storage locations, and wherein the mobile communication device includes an optical data capture mechanism, includes rendering, in one mobile communication device, data in a computer readable form; determining if the rendered data can be stored in a single data file; converting the rendered data to a graphic representation; and reading and storing the graphic representation with the optical capture mechanism of another mobile communication device.