多参数现场激光粒度分析仪校准方法研究

Study on the calibration method of multi-parameter in-situ laser particle size analyzer

现场激光粒度分析仪可以在水文观测现场测量悬浮体粒度、水温、深度等多个参数,因使用方便、数据获取效率高,其应用日趋广泛,已成为沉积动力观测的常规仪器之一。该仪器的光学部分十分精密,容易在运输、布放过程中因机械振动、碰撞等原因发生偏差,故有进行量值溯源的必要性,但目前国内外并无此类海洋仪器的校准规范。该文对现场激光粒度分析仪的基本原理、应用进行介绍,提出现场激光粒度分析仪的各参数的校准方法,并对校准实验中可能涉及的问题进行讨论。

In-situ laser particle size analyzer can measure suspended particle size,water temperature,depth and other parameters in hydrological observation site.Because of its convenient use and high data acquisition efficiency,it has been widely used and has become one of the conventional instruments for sediment dynamic observation.The optical part of the instrument is very precise.It is easy to deviate due to mechanical vibration and collision during transportation and placement.Therefore,it is necessary to trace the value of the instrument.However,there is no calibration standard for this kind of marine instrument at home and abroad.In this paper,the basic principle and application of in-situ laser particle size analyzer are introduced.The calibration methods of parameters and uncertainty evaluation methods of in-situ laser particle size analyzer are proposed.The possible problems in calibration experiments are discussed.