CAJ | 학술논문

为了实现同时测量气溶胶粒子的谱分布和折射率,研制了一种新的双角度光学粒子计数器(D-OPC),该计数器采用60°和110°双散射角系统对气溶胶谱分布进行测量.利用Mie散射理论定义敏感函数,选取两个最佳的散射角,使其既对折射率敏感又不线性相关.然后,利用气溶胶折射率对两个散射角系统敏感性的差异来反演气溶胶折射率.最后,利用该仪器对大气气溶胶谱分布以及折射率进行实际测量.与TSI公司黑炭仪和浊度计测量的吸收系数和散射系数对比表明,双散射角光学粒子计数器测量气溶胶折射率和谱分布结果合理,测量误差<20%,可以满足同时测量气溶胶粒子谱分布和折射率的需要.
위료실현동시측량기용효입자적보분포화절사솔,연제료일충신적쌍각도광학입자계수기(D-OPC),해계수기채용60°화110°쌍산사각계통대기용효보분포진행측량.이용Mie산사이론정의민감함수,선취량개최가적산사각,사기기대절사솔민감우불선성상관.연후,이용기용효절사솔대량개산사각계통민감성적차이래반연기용효절사솔.최후,이용해의기대대기기용효보분포이급절사솔진행실제측량.여TSI공사흑탄의화탁도계측량적흡수계수화산사계수대비표명,쌍산사각광학입자계수기측량기용효절사솔화보분포결과합리,측량오차<20%,가이만족동시측량기용효입자보분포화절사솔적수요.
A new Optical Particle Counter(OPC) with 60° and 110° double-scattering angles was developed in the paper for measuring aerosol refractive indexes and size distributions synchronously.On the basis of defining a sensitive function by Mie scattering theory,two optimum scattering angles were selected,then,the difference of two sattering angles sensitive to aerosol refractive indexes was used to inverse the aerosol refractive indexes. Finally, a prototype with 60° and 110° double scattering-angle of OPC (D-OPC) was used in the experiments at Hefei for measuring aerosol refractive indexes and size distributions. The scattering and absorption coefficient values measured by the D-OPC were compared with that measured by an Aethalometre and an Integrating Nephelometer(designed by TSI). The comparison results indicate that measured data by the D-OPC are reasonable and the measuring error is less than 20%,which shows the D-OPC can satisfy the requirements of measurement of aerosol refractive indexes and size distributions synchronougly.