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Method and device for measuring liquid level of layered interface in layered liquid

A liquid level measurement and interface technology, which can be used in measurement devices, liquid/fluid solid measurement, liquid level indicators, etc., and can solve problems such as inaccurate measurement of measurement costs.

Pending Publication Date: 2022-04-15
NINGBO POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of inaccurate measurement and high measurement cost caused by the extremely small difference in density between the upper and lower liquid layers or the similar properties of the two liquids in the current interface measurement method of two layered liquids with different densities, the present invention proposes a Method for level measurement of layered interfaces in layered liquids,

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  • Method and device for measuring liquid level of layered interface in layered liquid
  • Method and device for measuring liquid level of layered interface in layered liquid

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Embodiment 1

[0051] In order to solve the problems of inaccurate measurement and high measurement cost caused by the extremely small difference in the density of the upper and lower liquids or the similar properties of the two liquids in the current interface measurement method of two layered liquids with different densities, such as figure 1As shown, the present invention proposes a liquid level measurement method for a layered interface in a layered liquid, which obtains the layered interface by tilting the light source at several preset liquid levels and the photodetector arranged directly opposite the light source The liquid level value of interface, described liquid level measuring method comprises the steps:

[0052] S01: Control the light sources to turn on and off one by one, obtain the light intensity value of the corresponding photodetector when each light source is turned on, and the light intensity value of the photodetector at the upper and lower adjacent positions of the photo...

Embodiment 2

[0075] Such as figure 2 As shown, the present invention also proposes a liquid level measurement device for a layered interface in a layered liquid, including: a processor, pressure sensors arranged at several preset liquid levels, several light sources and correspondingly arranged light sensors detector; where:

[0076] A pressure sensor for obtaining the pressure at each preset liquid level;

[0077] a light source, which is obliquely arranged at several preset liquid levels, and is used to sequentially emit light;

[0078] The light detector is used to obtain the light intensity value of the corresponding light detector when each light source is turned on one by one under the condition of no light, and the light intensity value of the light detector located at the upper and lower adjacent positions of the light detector is adjacent light Intensity value, the adjacent light intensity value includes the upper adjacent light intensity value and the lower adjacent light inte...

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Abstract

The invention discloses a liquid level measurement method and device for a layered interface in layered liquid, and relates to the field of liquid level measurement. The liquid level measurement method comprises the steps that light sources are controlled to be turned on and turned off one by one, and light intensity values of light detectors corresponding to the light sources are obtained when the light sources are turned on; the light intensity value of the light detector at the upper and lower adjacent positions of the light detector is an adjacent light intensity value; obtaining a difference value of light intensity values between adjacent positions of the light detector corresponding to each light source, and obtaining a first interface liquid level value through the difference value; a second interface liquid level value is obtained according to the adjacent position difference value; a third interface liquid level value is obtained according to the difference value between the light intensity value of the corresponding light detector and the light intensity value of the lower adjacent position of the light detector; obtaining a fourth interface liquid level value according to the pressure intensity at each preset liquid level; the target interface liquid level value is obtained by using the preset weight according to the interface liquid level values, and the problem that accurate measurement cannot be achieved due to the fact that the density difference of the upper liquid and the lower liquid is extremely small or the properties of the two liquids are similar at present is solved.

Description

technical field [0001] The invention relates to the field of liquid level measurement, in particular to a liquid level measurement method and device for layered interfaces in layered liquids. Background technique [0002] The interface measurement of two layered liquids with different densities is very important in chemical industry and water treatment production. The existing measurement methods are: [0003] Magnetic Suspension Interface Level Gauge: Look for a float whose density is between the densities of the upper and lower layers of liquid. The float can float on the interface. The disadvantage is that the difference in density between the upper and lower layers of some liquids is very small, and this kind of float is difficult to find, or the work is unreliable, and often false alarms, which have been basically eliminated at present; [0004] Radar interface level gauge: use the radar wave reflected by the interface to identify the interface. This method requires ...

Claims

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Application Information

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IPC IPC(8): G01F23/292
Inventor 李勇王婧婧
Owner NINGBO POLYTECHNIC