Sensing device and method

摘要

The present invention is to provide a sensing device and method for direct measurement of a concentration of PM contained in exhaust gas and measurement of PM concentration in an exhaust pipe.: a power supply unit (10); an electrode unit (11) fitted in the exhaust pipe and composed of a pair of parallel flat plates; and a sensing unit (12) for measuring electrical characteristics of the electrode unit (11) after the power supply unit (10) applies a predetermined voltage to the electrode unit (11) and PM contained in exhaust gas inside the exhaust pipe is deposited onto the electrode unit (11),and for sensing the concentration of the PM contained in the exhaust gas inside the exhaust pipe from the measured electrical characteristics.