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Salinity detection method and salinity meter thereof

A detection method, salinity meter technology, applied in the direction of material resistance, etc., can solve the problems of large deviation and inaccuracy of salinity value, and the sampling value is easily fluctuated by environmental factors, etc., and achieve the effect of accurately fixing the salinity value

Inactive Publication Date: 2015-02-25
NINGBO YIQIAO ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the salt value calculated in this way has a large deviation and is not accurate, and the sampling value is very susceptible to fluctuations due to environmental factors, and it is impossible to achieve a precise and fixed value

Method used

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  • Salinity detection method and salinity meter thereof
  • Salinity detection method and salinity meter thereof
  • Salinity detection method and salinity meter thereof

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Embodiment Construction

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below.

[0018] The salinity detection method of the embodiment of the present invention comprises the following steps:

[0019] Put two parallel plates into the solution to be tested, apply a certain potential at both ends of the plates, and then measure the current flowing between the plates;

[0020] Calculate the conductivity (G) of the measured solution according to Ohm's law;

[0021] Calculate the unit conductivity: conductivity (G) * conductivity cell constant (L / A), where L is the length of the liquid column between the two plates, and A is the area of ​​the plates;

[0022] Two gold fingers with gold-plated brass surface placed in parallel are used as probes. According to different conductivity, the electric bridge converts the change of resistance into the change of output voltage or adopts the method of ...

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Abstract

The embodiment of the invention discloses a salinity detection method which comprises the following steps: putting two parallel polar plates into a tested solution, applying a certain electric potential to two ends of the polar plates, and measuring the current flowing through the polar plates; calculating the conductivity (G) of the tested solution according to an Ohm's law; calculating the unit conductivity: the conductivity (G)*cell constant (L / A), wherein L refers to the liquid column length between the two polar plates, and A refers to the area of the polar plates; taking two golden fingers arranged on the gold plated surface of brass in parallel as probes, converting the change of resistance into change of output voltage by virtue of a bridge according to different conductivities, or adopting a series resistance voltage division method, filtering, amplifying, compensating, rectifying, amplifying, feeding into an A / D conversion chip, and finally reading the data by virtue of a singlechip system. According to the salinity detection method and the salinity meter thereof provided by the invention, the calculated salinity value is accurate and fixed.

Description

technical field [0001] The invention relates to the field of salinity calculation, in particular to a salinity detection method and a salinity meter thereof. Background technique [0002] At present, the salinity meter used in household food detection on the market is to dissolve the food in water and then filter the filtrate, which is placed in the cuvette of the salinity meter, because light will produce light when it passes from one medium to another. The phenomenon of refraction, and the ratio of the sine of the incident angle is constant, this ratio is called the refractive index. The refractive index of the salt solution can be determined by using the direct ratio between the content of soluble substances in the salt solution and the refractive index under ordinary circumstances, so that the salinity meter / refractometer can calculate the concentration of the salt. However, the salt value calculated in this way has a large deviation and is inaccurate, and the sampling ...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 倪双
Owner NINGBO YIQIAO ELECTRONICS TECH CO LTD
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