DIGITAL PROCESSOR SENSOR LOOP DETECTOR AND METHOD

摘要

An apparatus for use in a conveyor belt rip detector that couples excitation signals to sensor loops carried by a conveyor belt and thereafter, detects corresponding received signals from respective sensor loops, comprises a digital processor providing excitation signals having a fixed duration and a first frequency for transmission to a sensor loop, digitally processing corresponding received signals to determine magnitude and phase values at the first frequency, and determining a qualitative state of the sensor loop in response to determining the magnitude and phase values, wherein the fixed duration terminates transmission of a respective excitation signal prior to determining the magnitude and phase values, thereby reducing an inherent capacitive cross-coupling that generates noise.