Liquid refractive index real-time measuring device and on-line measuring method

A liquid refractive index, real-time detection technology, applied in the field of optical means, can solve the problems of inability to realize real-time online measurement, complex structure, poor anti-interference ability, etc., and achieve the effect of simple structure, high measurement accuracy and strong anti-interference ability.

Inactive Publication Date: 2010-07-14
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this device is its complex structure and poor anti-interference ability, especially to obtain a liquid refractive index measurement data, which requires multiple measurements, so it cannot achieve the purpose of real-time online measurement

Method used

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  • Liquid refractive index real-time measuring device and on-line measuring method
  • Liquid refractive index real-time measuring device and on-line measuring method
  • Liquid refractive index real-time measuring device and on-line measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] exist figure 1 Among them, the liquid refractive index real-time detection device of this embodiment is composed of a housing 1, a semiconductor laser 2, a CCD camera 3, a computer 4, a flat panel image display glass 5, and an optical fiber 6 connected to form.

[0026] The housing 1 of this embodiment is a stainless steel or opaque engineering plastic housing 1, and a flat image display glass 5 is sealed and installed at the lower end of the housing 1. The upper surface of the flat image display glass 5 is a textured surface, and the lower The surface is an optical surface, and the flat image display glass 5 of the present embodiment is H-K9 flat optical glass, its refractive index n is 1.5146, and the thickness h is 4 mm, and the light incident surface of the flat image display glass 5 is a textured surface and an exit surface for the optical surface. The upper end of the housing 1 is fixedly connected with a light-emitting device and a CCD camera 3 with a threaded f...

Embodiment 2

[0038] In this embodiment, a flat image display glass 5 is sealed and installed at the lower end of the housing 1. The flat image display glass 5 in this embodiment is H-K9 flat optical glass, its refractive index n is 1.5146, and its thickness h is 3 mm. The flat panel image shows that the light incident surface of the glass 5 is a textured surface, and the outgoing surface is an optical surface. The coupling relationship of other components and components is the same as that of Embodiment 1.

[0039] The refractive index of distilled water and edible rapeseed oil is measured by using the liquid refractive index real-time detection device of this embodiment and the Abbe refractometer, and the measurement method is as follows:

[0040] The method of measuring the refractive index of distilled water and edible rapeseed oil by using the liquid refractive index real-time detection device of this embodiment and the Abbe refractometer is exactly the same as that of Embodiment 1. T...

Embodiment 3

[0045] In this embodiment, a flat image display glass 5 is sealed and installed at the lower end of the housing 1. The flat image display glass 5 in this embodiment is H-K9 flat optical glass, its refractive index n is 1.5146, and its thickness h is 5 mm. The flat panel image shows that the light incident surface of the glass 5 is a textured surface, and the outgoing surface is an optical surface. The coupling relationship of other components and components is the same as that of Embodiment 1.

[0046] The refractive index of distilled water and edible rapeseed oil is measured by using the liquid refractive index real-time detection device of this embodiment and the Abbe refractometer, and the measurement method is as follows:

[0047] The method of measuring the refractive index of distilled water and edible rapeseed oil by using the liquid refractive index real-time detection device of this embodiment and the Abbe refractometer is exactly the same as that of Embodiment 1. T...

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Abstract

The invention relates to a liquid refractive index real-time measuring device, wherein the lower end of the inside of a light-proof shell is provided with flat-plate image display glass, the thickness h of the flat-plate image display glass is 3-5mm, the incident plane of light is a frosted surface, the exit surface is an optical surface, a luminescent element and a CCD camera are arranged on the upper end of the inside of the shell, the output end of the luminescent element is linked with the frosted surface of the flat-plate image display glass through optical fibre, and the output end of the CCD camera is connected with a computer through a cable. A method which adopts the measuring device to measure the liquid refractive index is as follows: the optical surface of the flat-plate image display glass is soaked in a liquid to be measured; visible light is transferred on the frosted surface of the flat-plate image display glass through optical fibre, reaches the interface between the liquid to be measured and the flat-plate image display glass and is reflected on the frosted surface of the flat-plate image display glass to form a circular dark spot using an incident light spot as the centre of the circle; and the CCD camera converts the received circular dark spot to a digital signal and outputs the digital signal to the computer, and the computer calculates the refractive index of the liquid to be measured.

Description

technical field [0001] The invention belongs to the technical field of using optical means, that is, using infrared light, visible light or ultraviolet light to test or analyze materials, and specifically relates to using an interference measurement method and a schlieren method to test the refractive index of a liquid. Background technique [0002] As an important parameter of liquid physical properties, the refractive index of liquid can reflect the concentration, composition, specific gravity and other values ​​in the liquid. Therefore, the real-time online measurement of liquid refractive index is of great significance in the control and monitoring of related industrial production processes. It is also the current professional An important issue that technicians are still working on. So far, the measurement of liquid refractive index can be divided into two categories: geometric optics and wave optics. The geometric optics instrument has simple structure, convenient ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/41
Inventor 苗润才张宗权杨宗立贾西友韩鹏斌
Owner SHAANXI NORMAL UNIV
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