VIBRATION SENSOR WITH TWO-WIRE INTERFACE AND BIAS USED FOR MEASURE TEMPERATURE

摘要

A sensor with integrated mechanical transducing and temperature monitoringrncapability is described. The sensor includes housing containing a transducer, a temperaturernsensor with associated bias, a summing circuit, and a two-wire cable connector. Therntransducer is operable to output a dynamic transducer waveform that corresponds to dynamicrnmechanical perturbations sensed by the transducer. The temperature sensor is operable tornoutput a quasi-static temperature waveform that corresponds to temperatures sensed by therntemperature sensor. The summing circuit is operable to combine the transducer waveformrnand the temperature waveform into a composite modulated voltage bias output signal orrnmodulated current bias output signal. The two-wire cable standard connector is accessible onrnan outside of the housing and is connectable to a two wire cable that delivers power to thernsensor from a power source and delivers the composite output signal from the sensor to arnremote data acquisition circuit.