The architecture chosen to meet the above mentioned requirements is shown in block diagram form in Figure 1. The package chosen to meet the requirements is shown in Figure 2. The fundamental design is single board in nature.
The sealed NEMA 4 rated unit is designed to operate without fans or special cooling up to and beyond 50 degrees C. Total power consumption is less than 4 Watts, greatly simplifying packaging. DC power at 24 volts was chosen as
the nominal supply since it is quite readily available in a plant-manufacturing environment. Sixteen critical machines were selected from a Ford Engine Plant, and data was collected for over 6 million machining “hits” and analyzed
against the original fault criterion for robustness and reliability. The resulting algorithms were coded and proven first on a PC utilizing stored disk time histories, and then ported to the DSP inside the signal conditioner, and verified by
playing the digitized time histories into the signal conditioner. Figure 1 – Block diagram of a Smart Sensor Signal Conditioner.
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