EXHAUST GAS MEASURING SYSTEM

• Main Author: NISHIO TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 30.11.2017
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide an exhaust gas measuring system that can retrain influences of deflection of housing on measurement results.SOLUTION: Plural measuring electrodes 13 are disposed on the inner face of a flow channel 113. A classifying electrode 12, disposed on the other side relative to the plural measuring electrodes 13 on the inner face of the flow channel 113 with the flow channel 113 in-between, causes an electric field to be generated in the flow channel 113 thereby causing electrically charged particles in sample gas flowing in the flow channel 113 to be attracted by one or another of the plural measuring electrodes 13. The plural measuring electrodes 13 are arranged symmetrically in the flowing direction D of the sample gas in the flow channel 113 with respect to a fixed center line C. When a detector is performing detection by operating an air blowing mechanism, the deflection extent of a housing 11 become equal in the positions of a pair of measuring electrodes 13 (a first measuring electrode 131 and a fourth measuring electrode 134) symmetrically arranged in the flowing direction D with respect to the center line C.SELECTED DRAWING: Figure 4B 【課題】ハウジングの撓みが測定結果に与える影響を抑制することができる排ガス測定装置を提供する。【解決手段】複数の測定電極１３が、流路１１３の内面に設けられている。分級電極１２が、流路１１３の内面における複数の測定電極１３に対して流路１１３を挟んで反対側に設けられ、流路１１３内に電界を発生させることにより、流路１１３内を流れる試料ガス中の帯電粒子を複数の測定電極１３のいずれかに引き付ける。複数の測定電極１３は、一定の中心線Ｃに対して、流路１１３内における試料ガスの流通方向Ｄに対称配置されている。送風機構を動作させて検出部による検出を行っているときには、中心線Ｃに対して流通方向Ｄに対称配置された１対の測定電極１３（第１測定電極１３１及び第４測定電極１３４）の位置において、ハウジング１１の撓み量が同一となる。【選択図】 図４Ｂ