FINE PARTICLE SENSOR AND FINE PARTICLE DETECTION SYSTEM

• Main Authors: MOTOMURA MASAYUKI, OSAWA TAKAMASA, SUGIYAMA TAKESHI
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2016
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a fine particle sensor capable of properly detecting fine particles included in gas to be measured.SOLUTION: A fine particle sensor 10 comprises: an inside metal fitting 20 having a first potential PV1 and having a gas introduction pipe 25 for introducing a gas EG to be measured into the inside; a cylindrical outside metal fitting 70 surrounding the inside metal fitting 20 in the radial direction, mounted on a vent pipe EP and having a ground potential PVE; and a cylindrical insulating spacer 100 intervened between the inside metal fitting 20 and the outside metal fitting 70 to electrically insulate therebetween. The insulating spacer 100 includes: a gas contact portion 101 including a gas contact surface 101s contacted with the gas EG to be measured circulated through the vent pipe EP; and a temperature detecting element (a heat element 106) arranged inside the insulating spacer 100 to detect the temperature of the gas contact portion 101.SELECTED DRAWING: Figure 1 【課題】被測定ガス中に含まれる微粒子を適切に検知できる微粒子センサを提供する。【解決手段】微粒子センサ１０は、第１電位ＰＶ１とされ、被測定ガスＥＧを内部に取り入れるガス取入管２５を有する内側金具２０と、内側金具２０の径方向周囲を囲み、通気管ＥＰに装着されて接地電位ＰＶＥとされる筒状の外側金具７０と、内側金具２０と外側金具７０との間に介在して両者を電気的に絶縁する筒状の絶縁スペーサ１００とを備える。絶縁スペーサ１００は、通気管ＥＰ内を流通する被測定ガスＥＧに接するガス接触面１０１ｓを含むガス接触部１０１と、当該絶縁スペーサ１００の内部に配置されてガス接触部１０１の温度を検知する温度検知素子（発熱抵抗体１０６）とを有する。【選択図】図１