FLEXIBLE DISTRIBUTED PROCESSING SYSTEM FOR SENSOR DATA ACQUISITION AND CONTROL

摘要

A digital physical parameter sensing network having a communication bus (18) and a plurality of nodes (12) connected to the bus (18) for communicating with a central computer (10) through sensors under control of a central computer (10) to measure factors such as temperature, pressure, flow rate, filter efficiency at numerous locations in a system such as a water treatment plant. Each sensor is precalibrated with voltage offset information, sensitivity variations, corrections for non linear behavior stored in memory at the sensor. All sensors generate corrected voltage signals confirming with the measured physical parameter so that any sensor can be replaced without requiring recalibration.