| 摘要 |
<p>PURPOSE:To measure a hexane insoluble component and degree of oxidation and to easily and exactly detect deterioration of oil by providing a means for measuring the absorbancy of IR light of 6mum wavelength in addition to a means for measuring the hexane insoluble component. CONSTITUTION:A light source 1 which emits IR light and optical sensors 3, 4 consisting of pyroelectric elements are disposed on both sides of light transparent windows which are disposed to face each other to a part of the wall of an oil supplying pipe and consist of silicon. An optical sensor 2 consisting of a pyroelectric element is disposed as a sensor for reference near the light source 1. An optical filter 5 which consists of an alumina sheet and allows the transmission of only the light of 6mum wavelength is disposed in front of the optical sensor 4. The outputs of the optical sensors 2, 3 and the outputs of the optical sensors 2, 4 are respectively inputted to differential ampifiers 7a, 7b. Then, the hexane insoluble component is detected from the output of the sensor 3 and the degree of oxidation (total acid value) is detected from the output of the optical sensor 4.</p> |
