A particulate trap regeneration system is provided, which may include a
particulate trap having a filter medium configured to remove one or more
types of particulate matter from an exhaust flow of an engine and a
regeneration device configured to reduce an amount of particulate matter
in the particulate trap, as well as a radio frequency-based particulate
loading monitoring system configured to determine an amount of
particulate matter trapped by the filter medium. The particulate loading
monitoring system may include at least one radio frequency transmitting
probe configured to transmit radio frequency signals of predetermined
magnitude and predetermined frequency toward the filter medium and at
least one radio frequency receiving probe configured to receive and
measure the magnitude of received radio frequency signals that pass
through the filter medium. Further, the system may include a temperature
sensing device configured to take a temperature measurement indicative of
a temperature of the particulate trap at the time the radio signals are
received by the receiving probe and a controller, which may be configured
to determine, based on the measured magnitude of received radio frequency
signals, a particulate loading value indicative of the amount of
particulate matter trapped in the filter medium. The controller may also
be configured to perform a temperature compensation including modifying,
based on the temperature measurement, at least one of the following: the
measured magnitude of the received radio frequency signals that pass
through the filter medium or the particulate loading value.