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Layered solution supernatant liquid thickness detection method

A technology of liquid thickness and detection method, applied in the field of laser technology, can solve the problems of complex system and small measurement range, etc.

Active Publication Date: 2020-05-29
SICHUAN UNIV +1
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the measurement range is small or the system is complicated when measuring the thickness of the upper layer of two immiscible liquids, and provides a method for detecting the thickness of the upper layer of a layered solution

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  • Layered solution supernatant liquid thickness detection method
  • Layered solution supernatant liquid thickness detection method
  • Layered solution supernatant liquid thickness detection method

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Embodiment

[0149] This example is specifically:

[0150] Using 1064nm laser of Nd:YAG laser as excitation light source, pulse width 10ns, energy about 80mJ, spectrum sampling frequency 1HZ, sampling delay is 290μs, the laser passes through the 1064nm laser total mirror to change the optical path, and is focused by a lens with a focal length of 7.5cm. The plasma is excited at the focal position on the surface of the sample solution from top to bottom. The experiment uses the AvaSpec-ULS2048CL-EVO fiber optic spectrometer (AVANTES company) spectrometer for signal detection. The optical fiber probe collects the spectral signal on the outer wall of the beaker, and the signal light is photoelectrically converted and input To the computer, recorded by Avasoft software. In order to avoid the rise of the liquid level when adding oil droplets with a pipette, the depth of focus will change. Every time the liquid level changes, the height of the sample must be adjusted using a three-dimensional mobile...

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Abstract

The invention relates to the laser technology and is to solve a problem that a measurement range is small or a system is complex when thicknesses of supernatant liquid of two types of immiscible liquid are measured at present. The layered solution supernatant liquid thickness detection method is characterized by comprising steps of irradiating the to-be-detected layered solution by adopting detection laser to obtain a current breakdown spectrum, and calculating thickness of the supernatant liquid according to a breakdown distance, a proportionality coefficient and a ratio of the characteristicpeak in a characteristic spectral line of an upper-layer characteristic element to the characteristic peak in a characteristic spectral line of a lower-layer characteristic element in the obtained breakdown spectrum. The method is advantaged in that the thickness range of the supernatant liquid of the layered solution can be greatly widened, and the method is suitable for measuring the thicknessof the supernatant liquid of the layered solution.

Description

Technical field [0001] The invention relates to laser technology, in particular to a technology for detecting the thickness of the upper layer of a layered solution based on laser plasma spectroscopy. Background technique [0002] At present, there are many situations in reality where the thickness of the upper liquid of two immiscible liquids needs to be measured. A typical example is oil-water separation. Take oil-water separation technology as an example. The currently known oil-water separation methods include gravity separation and filtration. The development of oil-water separation methods has also promoted the rapid development of oil-water monitoring methods. In oil-water monitoring, it is very important to measure the thickness of the oil layer. At present, the difference in conductivity is used, Detection methods such as Raman spectroscopy, laser ultrasonic remote sensing, thermal infrared spectroscopy, differential laser triangulation, and optical fiber displacement se...

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Application Information

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IPC IPC(8): G01B11/06G01N21/71
CPCG01B11/0658G01N21/718
Inventor 韩敬华王瑞冯国英门金亮
Owner SICHUAN UNIV
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