RU42662U1 - DEVICE FOR ANALYSIS OF FLUIDS - Google Patents

Abstract

The device relates to the field of analytical instrumentation and can be used for technical measurements in water treatment systems, for monitoring water bodies, in gas analysis systems for determining the concentration of impurities in fluids. The utility model is based on the task of creating a device for analyzing fluids that would monitor liquid media in a continuous mode, without sampling, directly in the flow of a controlled liquid or gas, which is achieved due to the fact that the ends of the fibers are enclosed in a plastic opaque cable, the end part of the probe, the optical fibers are glued into the metal mandrel at an acute angle to each other, so as to ensure that the fiber apertures intersect at an angle of 15-30 degrees to each other, while The LED of the visible range of the spectrum was selected at the source, while the sensor and the object are equipped with transitional devices for their fastening to each other.

Description

The device relates to the field of analytical instrumentation and can be used for technical measurements in water treatment systems, for monitoring water bodies, in gas analysis systems for determining the concentration of impurities in fluids.

A device for analyzing water containing a measuring cuvette, photodetectors, fixing the light,

reflected suspended particles and passed through the analyzed water (RF patent No. 2132049, G 01 N 15/04, G 01 N 27/26, publ. 1999.06.20).

The disadvantage of this device is that a cuvette of rather complicated design is used, sampling is necessary, which is not always convenient.

Known fiber-optic gas analyzer containing sequentially mounted and optically coupled emitter, input optical fiber, multi-way cuvette, consisting of 3 spherical mirrors, 2 of which are cuvette lens mirrors located at a double focal distance from the third collective mirror, the output optical fiber, photodetector, registration and processing unit (RF patent No. 2091764, G 01 N 21/61, publ. 09/27/97).

The disadvantage of the gas analyzer is the use of mirrors for a multi-pass cell, which during operation leads to additional losses, as well as to the need for periodic cleaning.

The utility model is based on the task of creating a device for the analysis of fluids, which would carry out

monitoring of liquid media in a continuous mode, without sampling, directly in the flow of a controlled liquid or gas.

The above goal is achieved due to the fact that in a device for analyzing fluids containing sequentially installed and optically coupled light source, an input optical fiber, an object under investigation, an output optical fiber, a photodetector, an information recording and processing unit, the ends of the fibers are enclosed in a plastic opaque cable, in the end of the probe, fiber optic fibers are glued into a metal mandrel at an acute angle to each other, so as to ensure the intersection of the apertures of the optical fibers at an angle of 15-30 degrees to each other, and the LED of the visible range of the spectrum is selected as a source, while the sensor and the object are equipped with transitional devices for fixing them to each other.

The presence of a fiber-optic sensor with a transition device allows you to establish stationary monitoring of the investigated object without sampling. The installation of the ends of the fibers in the sensor so that the angle between the central axes of the fibers is from 15 to 30 °, can significantly increase the accuracy of the measurements due to the fact that the intensity of the scattered light in this range of angles is maximum.

Using an LED as a light source can significantly reduce the cost of the entire device.

A useful model is illustrated in figure 1, which shows a block diagram of a device. The device comprises a light source 1, an input optical fiber 2, an output fiber 3, a sensor 4 with a transition device, an object 5, a photodetector 6, an information recording and processing unit 7.

The device operates as follows. The radiation from the light source 1 is introduced into the input optical fiber 2 and fed into the analyzed medium 5. The scattered light is detected by the output optical fiber 3 installed in the sensor 4 at an angle between the central axes of the fibers, which is from 15 to 30 °. Next, the radiation enters the photodetector 6, and then to the control unit, registration and processing of information 7.

The installation of the fibers in such a way that the angle between their central axes is from 15 to 30 ° corresponds to an increase in the intensity of the scattered light and, accordingly, an increase in the sensitivity of the entire device.

The intensity of the light emitted by the LED, to ensure optimal registration of the flow parameters, usually ranges from 1 to 3 candelas.

This device can also be used in gas analysis systems to determine the concentration of impurities in fluids.

Claims (1)

A device for analyzing fluids containing a sequentially installed and optically coupled light source, an input optical fiber, an object to be studied, an output optical fiber, a photodetector, a control unit for recording, processing and information processing, characterized in that an additional sensor is installed in which the fiber ends are enclosed into a plastic opaque probe, in the end of which fiber optic fibers are sealed in a metal mandrel so as to ensure that the apertures intersect the light gadgets at an angle of 15-30 ° to each other, while the LED of the visible range of the spectrum is selected as the source, while the sensor and the object are equipped with transitional devices for fixing them to each other.