Liquid content detecting device for alcohol regular gasoline and

Details Liquid content detecting device for alcohol regular gasoline and Liquid content detecting device for alcohol regular gasoline and

1991-07-10

1992-10-20

Evans, F. L.

Optics: measuring and testing

Refraction testing

356133, G01N 2141

Patent

active

051574535

ABSTRACT:
A liquid content detecting device is provided which can detect the contents of liquid components such as alcohol in a mixed fuel (both regular and premium gasolines) with a high degree of preciseness at all times over the entire operating temperature range in which the device is used. A refractive index sensor senses the refractive index of a liquid mixture which includes N kinds of liquid components. A liquid-kine identifying means identifies the kind of each of the liquid components. A temperature sensor senses the temperature of the liquid mixture. A liquid content calculator stores a temperature-dependent refractive index characteristic of various kinds of liquids including the liquid components in advance. The liquid content calculator is operable to select the temperature-dependent refractive index characteristic of each of the liquid components, and calculate the contents of the liquid components in the liquid mixture on the basis of the thus selected temperature-dependent refractive index characteristics of the liquid components and the refractive indexes of the liquid mixture, which are sensed by the refractive index sensor at (N-1) different temperatures.

REFERENCES:
patent: 3426211 (1969-02-01), Anderson
patent: 5015091 (1991-05-01), Suzuki et al.

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