FINE PARTICLE DETECTION SYSTEM

• Main Authors: MOTOMURA MASAYUKI, OSAWA TAKAMASA
• Format: Patent
• Language: English; Japanese
• Published: 27.07.2017
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a fine particle detection system capable of appropriately detecting the amount of fine particles contained in a measurement target gas.SOLUTION: A fine particle detection system includes insulation checking means for checking whether a degree of insulation between an inner metal fitting and outer metal fitting is within an acceptable range or not, and heater energizing means for energizing a heater to allow a heating resistor to generate heat. When the insulation checking means determines that the degree of insulation is not within the acceptable range, the heater energizing means performs a first heater energization process to energize the heater for a predetermined first time period t1, during which water adhered to a surface of an exposed portion of a sensor is expected to disappear. A sensor driving means is configured to drive the fine particle sensor after the insulation checking means determines that the degree of insulation is within the acceptable range, or after the first heater energization process is completed.SELECTED DRAWING: Figure 11 【課題】被測定ガスに含まれる微粒子の量を適切に検知できる微粒子検知システムを提供する。【解決手段】微粒子検知システムは、内側金具と外側金具との間の絶縁性の程度が許容範囲内であるか否かを検査する絶縁性検査手段と、ヒータに通電して発熱抵抗体を発熱させるヒータ通電手段とを備える。ヒータ通電手段は、絶縁性検査手段によって絶縁性の程度が許容範囲内でないと判定された場合に、ヒータに対し、センサ内露出部の表面に付着した水が除去されると見込まれる所定の第１時間ｔ１通電する、第１ヒータ通電を行う。センサ駆動手段は、絶縁性検査手段によって絶縁性の程度が許容範囲内であると判定された後、または、第１ヒータ通電が終了した後に、微粒子センサを駆動する。【選択図】図１１