CN2765180Y - A device for direct measurement of crude oil refractive index - Google Patents
A device for direct measurement of crude oil refractive index Download PDFInfo
- Publication number
- CN2765180Y CN2765180Y CN 200420052820 CN200420052820U CN2765180Y CN 2765180 Y CN2765180 Y CN 2765180Y CN 200420052820 CN200420052820 CN 200420052820 CN 200420052820 U CN200420052820 U CN 200420052820U CN 2765180 Y CN2765180 Y CN 2765180Y
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- refractive index
- crude oil
- capillary
- lens
- laser
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- 239000010779 crude oil Substances 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 title abstract description 8
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 239000004065 semiconductor Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 230000009466 transformation Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 13
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
一种直接测量原油折射率的装置。由激光器在内的形成条形光束的光学系统、毛细管及其后的观察屏以及CCD照相机和与导线相连的含有计算程序的计算机组成，且毛细管水平放置，其轴与柱面透镜的轴平行，并保持光学系统与激光束共轴。上述形成条形光束的光学系统是由凹透镜、凸透镜和柱面透镜组成，而且凹透镜与凸透镜的前焦点重合，且条形光束照射并覆盖在毛细管上。采用本装置产生的干涉条纹经由计算机进行图像处理，识别条纹的干涉级数与条纹上各点的坐标，利用已有的阿贝逆变换公式便可计算原油折射率。本装置结构简单，成本低，易操作，精度高，测量速度快。
A device for directly measuring the refractive index of crude oil. It is composed of an optical system that forms a strip beam including a laser, a capillary and a subsequent observation screen, a CCD camera, and a computer with a calculation program connected to a wire, and the capillary is placed horizontally, and its axis is parallel to the axis of the cylindrical lens. And keep the optical system coaxial with the laser beam. The above-mentioned optical system for forming a strip beam is composed of a concave lens, a convex lens and a cylindrical lens, and the front focus of the concave lens coincides with the convex lens, and the strip beam irradiates and covers the capillary. The interference fringes generated by this device are processed by a computer to identify the interference series of the fringes and the coordinates of each point on the fringes, and the refractive index of crude oil can be calculated by using the existing Abbe inverse transformation formula. The device has the advantages of simple structure, low cost, easy operation, high precision and fast measurement speed.
Description
Technical field
The utility model relates to a kind of interference technique of using up and directly measures low transparency crude oil refractive index, is a kind of device of direct measurement crude oil refractive index specifically.
Background technology
Refractive index is an important optical parameter to crude oil, calculating its special component, will using refractive index when measuring oil film thickness, also will use refractive index when some industrial processs are for example measured crude oil solubleness parameter.But because the transparency of crude oil is very little, traditional refraction method can't directly be measured its refractive index.When measuring the crude oil refractive index, must obtain transparent light constituent wherein, record the refractive index of these light constituents, then with the extrapolate refractive index of crude oil of these data with the method for refraction earlier with the crude oil fractionation with the apparatus and method of refraction.Also owing to can not record in the crude oil refractive index of low clear component with the method for refraction, thereby the refraction method measures being similar to of crude oil refractive index, and its measuring accuracy is near 10-4.In order to improve precision, must use the method for interfering, the document of measuring liquid refractive index based on the method for interfering is very many.Yet most method requires one with reference to sample, they otherwise can not be applicable to low transparent sample, or the device that uses is too complicated, and require meticulous calibration with many optical elements, thereby the cost height, it is big to measure difficulty.
Summary of the invention
The purpose of this utility model be to provide a kind of manufacture craft simple, with low cost, be suitable for commercialization production, measuring accuracy height, robotization height, the fireballing device that can directly measure low transparency crude oil refractive index, to solve the difficult problem that the crude oil refractive index can't directly be measured.
Fundamental measurement principle of the present utility model: as light source, the spatial alternation by light beam forms the kapillary that the bar shaped light beam irradiation fills crude oil with laser instrument, and light beam is enough wide, to cover the part of capillary midsection 4-5cm.Reference laser beam and the laser beam interference of passing through kapillary inside by the kapillary upper and lower form the visible interference fringe of human eye.This interference fringe directly and the direction at refraction angle perpendicular, thereby relevant with the refractive index of crude oil in the kapillary.Take interference fringe with high precision CCD camera, interference fringe machine is as calculated carried out digitized processing, to improve fringe contrast, accurately to determine the dried dried progression of penetrating of penetrating striped, adopt computer program to discern the coordinate of the maximum and the minimum brightness of interference fringes at different levels, just available existing Abbe inverse transformation formula calculates the refractive index of crude oil to be measured, and its precision is up to 5 * 10
-6
The utility model is made up of at the interior optical system that forms bar shaped light beam, the computing machine that is near kapillary and subsequent film viewing screen and the CCD camera the focal plane and contains calculation procedure laser instrument, and capillary water placing flat, its axle with cylindrical lens is parallel, and keeps or meet relevant optical principles such as optical system and laser beam be coaxial.
The optical system of above-mentioned bar shaped light beam is made up of concavees lens, convex lens and cylindrical lens, and concavees lens overlap with the front focus of convex lens, guarantee bar shaped light beam irradiation technically and cover on the kapillary, rather than a light pencil is penetrated on particular point capillaceous.This also is one of this apparatus features.
Use this device can directly measure the refractive index of low transparency crude oil, and this apparatus structure is simple, cost is low, and light path need not fine adjustment, and simple to operate, measuring speed is fast.
Description of drawings
Fig. 1 is a general structure synoptic diagram of the present utility model.
Fig. 2 is a structural parameters synoptic diagram of the present utility model.
Fig. 3 is a measurement schematic flow sheet of the present utility model
Wherein 1, laser instrument; 2, concavees lens; 3, convex lens; 4, cylindrical lens; 5, kapillary; 6, film viewing screen; 7, casing; 8, the CCD camera; 9, lead; 10, computing machine.
Embodiment
As accompanying drawing 1, shown in Figure 2, the utility model is made up of at the interior optical system that forms bar shaped light beam, the computing machine that is near kapillary 5 and subsequent film viewing screen 6 and the CCD camera 8 the focal plane and contains calculation procedure laser instrument 1, and kapillary 5 horizontal positioned, its axle with cylindrical lens is parallel, and keeps optical system and laser beam coaxial.
The optical system of above-mentioned bar shaped light beam is by concavees lens 2, and convex lens 3 and cylindrical lens 4 constitute, and concavees lens 2 overlap with convex lens 3 front focus, guarantees that technically bar shaped light beam shines and covers on the kapillary.Above-mentioned convex lens 3 can replace with plano-convex lens, to reduce device volume;
Laser instrument can replace with the green light of various continuous power outputs or semiconductor, gas or the solid state laser of ruddiness, but requires its output power greater than 10mw; The parallel beam that laser instrument sends is by the center of all optical components among Fig. 1.The focal length of concavees lens 2 is f
1, the focal length of convex lens 3 is f
2, concavees lens 2 overlap with the front focus of convex lens 3, and both spacings are f
2-f
1 Cylindrical lens 4 next-door neighbour's convex lens 3 are placed, and its focal length is f
3The light beam that laser instrument sends is via 2,3, and 4 become bar shaped light beam, the part of this bar shaped light beam irradiation and covering capillary midsection 4-5cm.The capillary water placing flat, its axle with cylindrical lens is parallel.The extracapillary inside radius is than being advisable less than 1.5.Film viewing screen 6 is one to have the translucent screen of coordinate and scale, is d from kapillary centre distance.For reducing the influence of parasitic light, concavees lens 2, convex lens 3, cylindrical lens 4, kapillary 5, film viewing screen 6 is fixed in the casing 7.CCD camera 8 is fixed on the tripod, be used for taking interference fringe, the CCD camera is connected with computing machine 10 by lead 9, interference fringe is carried out Flame Image Process via computing machine, to strengthen fringe contrast, accurately determine the interference level of striped, the maximum of definite interference fringes at different levels and the coordinate of minimum brightness of programming of being not difficult, by the refractive index of Abbe inverse transformation formula calculating crude oil, it is measured flow process and sees Fig. 3.The utility model of constructing thus also can be used for the measurement of transparency liquid and other low transparency liquid refractivity, so the measurement range of its refractive index is wide.Be the precision that guarantees to measure, all samples all should be measured as suitable under constant temperature.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420052820 CN2765180Y (en) | 2004-08-03 | 2004-08-03 | A device for direct measurement of crude oil refractive index |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420052820 CN2765180Y (en) | 2004-08-03 | 2004-08-03 | A device for direct measurement of crude oil refractive index |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2765180Y true CN2765180Y (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420052820 Expired - Fee Related CN2765180Y (en) | 2004-08-03 | 2004-08-03 | A device for direct measurement of crude oil refractive index |
Country Status (1)
| Country | Link |
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| CN (1) | CN2765180Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776571A (en) * | 2010-03-05 | 2010-07-14 | 陕西师范大学 | Liquid refractive index real-time measuring device and on-line measuring method |
| CN102636457A (en) * | 2012-04-19 | 2012-08-15 | 上海理工大学 | Trace liquid refractive index measuring system and measuring method |
| CN102998093A (en) * | 2012-11-05 | 2013-03-27 | 中山大学 | Device and method for quickly automatically measuring focal distance |
| CN104931457A (en) * | 2015-05-21 | 2015-09-23 | 中国科学院武汉岩土力学研究所 | Concentration field monitoring device for salt rock indoor water-soluble cavity construction test |
| CN111272705A (en) * | 2020-03-23 | 2020-06-12 | 潍坊森瑞特生物科技有限公司 | Quick detection method for dextrin solubility |
-
2004
- 2004-08-03 CN CN 200420052820 patent/CN2765180Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776571A (en) * | 2010-03-05 | 2010-07-14 | 陕西师范大学 | Liquid refractive index real-time measuring device and on-line measuring method |
| CN101776571B (en) * | 2010-03-05 | 2012-01-11 | 陕西师范大学 | Liquid refractive index real-time measuring device and on-line measuring method |
| CN102636457A (en) * | 2012-04-19 | 2012-08-15 | 上海理工大学 | Trace liquid refractive index measuring system and measuring method |
| CN102998093A (en) * | 2012-11-05 | 2013-03-27 | 中山大学 | Device and method for quickly automatically measuring focal distance |
| CN102998093B (en) * | 2012-11-05 | 2015-05-20 | 中山大学 | Device and method for quickly automatically measuring focal distance |
| CN104931457A (en) * | 2015-05-21 | 2015-09-23 | 中国科学院武汉岩土力学研究所 | Concentration field monitoring device for salt rock indoor water-soluble cavity construction test |
| CN111272705A (en) * | 2020-03-23 | 2020-06-12 | 潍坊森瑞特生物科技有限公司 | Quick detection method for dextrin solubility |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Designer after: Yang Ailing Designer after: Zhang Jinliang Designer after: Zheng Ronger Designer before: Yang Ailing Designer before: Zhang Jingliang Designer before: Zheng Ronger |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: DESIGNER; FROM: YANG AILING; ZHANG JINGLIANG; ZHENG RONGER TO: YANG AILING; ZHANG JINLIANG; ZHENG RONGER |
|
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |