Liquid densitometer

Abstract

A liquid density in a liquid supply tube, through which the liquid is supplied, is stably measured from the outside of the liquid supply tube. A liquid densitometer is provided with a liquid supply tube (14, 16) through which a liquid is supplied, a light transmission unit (15) set at a halfway point of the liquid supply tube (14, 16), a light projection unit (9, 22) that irradiates measurement light to the light transmission unit (15), a light reception unit (10, 23) that receives the measurement light to transmit through the light transmission unit (15), a support member (31) that supports movably the light projection unit (9, 22) and the light reception unit (10, 23) so as to move a measurement position (32) from which the light is irradiated to the light transmission unit (15) and at which the light reception unit (10, 23); receives the light transmitting through the light transmission unit (15), a measurement position moving mechanism (2) that makes the support member (31) move in order for the measurement position (32) to move in a predetermined area of the light transmission unit (15), and a data processing unit that acquires light intensity data which the light reception unit (10, 23) receives at a plurality of measurement positions (32) to calculate a density of the liquid, which flows through the liquid supply tube (14, 16), in accordance with the plurality of the light receiving intensities.

Description

technical field [0001] The present invention relates to a liquid concentration meter, in particular to a liquid concentration meter comprising a projection unit, a light receiving unit, and a data processing unit, wherein the projection unit is used to irradiate light to a light-transmitting unit provided in a liquid delivery pipe for transporting liquid, The light receiving part is used to receive the light passing through the light transmitting part, and the data processing part calculates the concentration of the liquid according to the intensity of the light received by the light receiving part. Background technique [0002] As a technique for measuring the liquid concentration in a tube that transports liquid, a liquid concentration meter that optically measures the liquid concentration is known (for example, refer to Patent Documents 1 and 2). In such a liquid concentration meter, since there is a problem of changing the shape of the tube when directly measuring the li...

AI Technical Summary

Problems solved by technology

[0006] 1) Measurement errors due to fouling of containers or tubes,

[0007] 2) Measurement error due to air bubbles in the container or tube,

[0008] 3) Measurement errors due to changes in the shape of the tube

[0010] However, it is not completely effective for any form of the liquid concentration meter disclosed in Patent Document 1, and measurement errors due to bubble adhesion cannot be avoided.

In addition, since the installation of spherical bodies or resistance parts in the container will cause contamination from the material or increase the resistance of the piping, it is contrary to the improvement of the quality of the piping.

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