SENSOR CONTROLLER

• Main Authors: MATSUOKA MIKIYASU, SAKAMOTO YUKI, MATSUMOTO YUZO
• Format: Patent
• Language: English
• Published: 23.02.2012
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MECHANICAL ENGINEERING; PHYSICS; STEAM ENGINES; TESTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a sensor controller capable of reducing detection errors of a particulate matters detection sensor and capable of obtaining the amount of particulate matters with a high degree of accuracy.SOLUTION: A PM sensor 17, having an object part to be attached where PMs (conductive particulate matters) contained in a gas are attached, and a pair of counter electrodes disposed on the object part to be attached at a separated state, outputs a detection signal according to the value of resistance between the pair of counter electrodes. The PM sensor 17 has a heater unit 35 for applying heat to the object part to be attached for the purpose of burning and removing PMs attached to the object part to be attached. A microcomputer 44 obtains a sensor detection value immediately after PMs are burned and removed by the heat applied by the heater unit 35, calculates a first sensor reference value, which is a sensor detection value in the state where PMs are removed from the object part to be attached, on the basis of the obtained sensor detection value, stores the first sensor reference value as a first learned value, and performs correction on the sensor detection value on the basis of the first sensor reference value that is stored.