Patent ID: 9074975
Filing Date: 2015-07-07
Classification: G01N

Abstract:
1. A particulate matter detecting apparatus that measures an amount of particulate matter in a gas comprising: a particulate matter sensor configured to measure the amount of particulate matter in the gas, the particulate matter sensor comprising: a heater configured to heat the first es and the second electrode; a detector configured to detect the output of the particulate matter sensor to detect amount of particulate matter on the first electrodes; and a controller configured to: when the first electrodes and the second electrode are heated, the first electrodes are set as positive electrodes and the second electrode is set as a negative electrode, and the power supply applies the reference voltage between the first electrodes and the second electrode; and when the power supply applies the reference voltage between the first electrodes and the second electrode, oxygen ions are produced at the second electrode and the oxygen ions produced are pumped through the solid electrolyte to reach the first electrodes.