公开(公告)号：US5194910A

公开(公告)日：1993-03-16

申请号：US561452

申请日：1990-07-31

申请人： James F. Kirkpatrick, Jr. ,  James R. Stevenson

发明人： James F. Kirkpatrick, Jr. ,  James R. Stevenson

IPC分类号： G01N21/31 ,  G01N33/28

CPC分类号： G01N33/2888 ,  G01N21/3151

摘要： Methods and apparatus employing optical spectrometry techniques to measure metallic wear debris contamination in used motor oil, even in the presence of carbon particulates. Measurement results based on optical spectrometry as disclosed herein correlate closely with results of laboratory analysis based on atomic spectrometry. Variation in transmittance of a sample of oil as a function of wavelength within the approximate range of 300 nm (violet) to 1300 nm (near-infrared) is measured as an indicator of metallic wear debris contamination. Conveniently, measurements may be taken at just two wavelengths within the range, for example 565 nm (green) and 660 nm (red). The ratio of transmittance at the shorter of the two wavelengths to transmittance at the longer of the two wavelengths is determined as an indication of the amount of metallic wear debris contamination, decreases in the ratio from a ratio of unity indicating increasing levels of contamination. Oil degradation not necessarily accompanied by metallic wear debris contamination may also be measured.

摘要翻译： 使用光谱技术测量二手机油中金属磨损碎片污染物的方法和设备，即使在碳颗粒存在下也是如此。 基于本文公开的基于光谱的测量结果与基于原子光谱法的实验室分析结果密切相关。 测量作为300nm（紫色）至1300nm（近红外）的近似范围内的波长的函数的油样品的透射率的变化作为金属磨损碎屑污染的指标。 方便地，可以在该范围内仅仅两个波长进行测量，例如565nm（绿色）和660nm（红色）。 将两个波长较短的透光率与两个波长较长时间的透射率的比率确定为金属磨损碎片污染物的量的指标，从表示污染水平增加的统一率的比率降低。 也可以测量不一定伴随金属磨损碎屑污染的油分降解。