Multiplexed autonomous sensors and monitoring system and associated methods

Abstract

A sensor monitoring system and associated methods are provide that preferably include a plurality of sensors connected in parallel across a single pair of wires that include resistances of equal value placed in series between each sensor. This allows each sensor to measure the voltage dropped between itself and the monitoring system to determine its relative placement on the bus to autonomously assign itself a number to delineate to the monitoring system its relative location on the equipment or item being monitored. The sensors modulate their internal resistance to change the current on the bus to transmit their status to the monitoring system.

1 . A monitoring system comprising:  
     means for measuring a quiescent signal provided by a sensor positioned within an environment having a first temperature;  
     means fro measuring a dynamic signal from the sensor during operation of the sensor at a second temperature;  
     means for comparing the quiescent signal to the dynamic signal for determining a change therebetween; and  
     means for modifying a gain in the dynamic signal based on the change for providing a corrected dynamic signal.