| 摘要 |
The present invention relates to a particulate material sensor, i.e., a sensor for detecting particulate materials such as soot inside the exhaust pipe of a vehicle. To achieve the above objective, a particulate material sensor according to the present invention comprises an insulator substrate, a detecting part formed on the insulator substrate, and a heater configured to heat the insulator substrate, and detects materials on particles through changes in the resistance value of the detecting part. Here, the detecting part comprises: a detecting pattern formed on a surface of the insulator substrate and including a plurality of electrically conductive unit grids separated a certain distance from each other; a first electrode pattern electrically connected to a portion of the unit grids; and a second electrode pattern electrically separated from the first electrode pattern and electrically connected to unit grids from among the unit grids that are not connected to the first electrode pattern. Also, the first electrode pattern and the second electrode pattern are connected to the unit grids such that mutually adjacent unit grids are connected to mutually different electrode patterns. The particulate material sensor according to the present invention has multiple corners present on the detecting part so as to be able to easily attach and grow materials on particles. Accordingly, there is the advantage of the sensitivity being higher than particulate material sensors of the prior art. |
