RU167316U1 - DEVICE FOR DETERMINING THE WATER TRANSPARENCY - Google Patents

Abstract

The utility model relates to the field of measurement technology and can be used for water quality control, environmental monitoring. The device contains a measuring tank located on a stand horizontally. In this case, the measuring tank is made in the form of a truncated cone of opaque material with a drain funnel on the wide side of the measuring tank, closed on both sides with transparent glass. The measuring tank contains guides for installing frames with fonts of various sizes and is equipped with a USB camera. The test water sample is poured through the drain funnel of the measuring tank. If possible, read the font calibrated by the formazine standard, projected by a USB camera onto a personal computer monitor, determine the level of water transparency. The technical result is the creation of a device for determining the level of transparency of water, which simplifies the measurement process and improves the accuracy of determining transparency. 1 ill.

Description

The claimed utility model relates to IPC G01N 21/47 and can be used for water quality control, environmental monitoring.

One of the methods for determining the transparency (light transmission) of water is based on measuring the height of the water column through which a black cross is visible on a white background or a special font.

A prior art device for determining the level of transparency of water by the method of "font" [1].

The device is a Snellen device - a glass cylinder graduated through a centimeter with a height of 30 cm and a diameter of 2.5-3 cm.

The cylinder is mounted vertically at a distance of 40 mm above the font with a letter height of 3.5 mm. The test sample is poured into the cylinder so that the font can be read, and the maximum height of the water column is determined. The method for quantitative determination of transparency is based on determining the height of the water column at which it is still possible to visually distinguish (read) the black font with a height of 3.5 mm and a line width of 0.35 mm on a white background. The method used is standardized and complies with ISO 7027.

The disadvantage of this technical solution is the vertical location of the measuring tube, insufficient accuracy and the complexity of the process for determining transparency.

The prototype of the proposed utility model is a device for determining the level of transparency of water [2] containing a measuring tank located horizontally on the stand. The measuring capacitance is equipped with a USB camera. By changing the size of the standard font displayed on the monitor of a personal computer with a text editor, if possible, read the font projected by the USB camera onto the same monitor, determine the level of water transparency.

The disadvantage of this technical solution identified during the operation of the device is the need to calibrate the device depending on the brightness parameters and resolution of the used personal computer monitor.

The technical result of the claimed utility model is the creation of a device for determining the level of transparency of water, which simplifies the measurement process and improves the accuracy of determining the level of transparency.

The technical result achieved is achieved through the use of a set of frames with a printed standard font of various sizes in the device. Printed frames are calibrated in a linear range using the NTU 20.0 Formazin standard.

Formazine Standard 20.0 NTU. It is prepared from an industrial concentrated standard and provides high accuracy during calibration.

In FIG. 1 shows a diagram of a device for determining the transparency of water. The device contains a measuring tank (1) made in the form of a truncated cone of opaque material. To drain the sample, a wide part of the tank is equipped with a drain funnel (2). On both sides, the container is hermetically sealed with transparent glass. The narrow part of the measuring capacity is equipped with a USB camera (3).

The wide part of the measuring capacitance contains guides (5) for installing frames (6) with fonts of various sizes, calibrated according to the NTU formazine standard 20.0

The studied water sample is poured through a drain funnel of a measuring tank located horizontally on a stand (4).

By setting frames (6) with different sizes of the standard font, for example, Times New Roman, if possible, read the font projected by the USB camera onto a personal computer monitor, determine the level of water transparency.

The source of information:

1. L.A. Kulsky, I.T. Goronovsky, A.M. Koganovsky, M.A. Shevchenko. Handbook of properties, methods of analysis and water purification. Kiev .: "Naukova Dumka." 1980 .-- S. 267-270.

2. RF patent No. 152969 U1, G01N 21/00 (2006.01)

Claims (1)

A device for determining the level of transparency of water, including a measuring container located horizontally on the stand, while the measuring container is made in the form of a truncated cone of opaque material with a drain funnel on the wide side of the measuring container, sealed with transparent glass on both sides, equipped with a USB camera, characterized in that the wide side of the measuring funnel contains guides for installing frames with calibrated fonts.