Differential solution concentration measuring device and method
A technology of solution concentration and measuring device, applied in measuring device, phase influence characteristic measurement, analyzing material, etc., can solve problems such as large deflection angle error
Inactive Publication Date: 2011-04-20
HARBIN ENG UNIV
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This method approximates the relationship between the minimum deviation angle and the concentration as a linear fit, and the error is large when measuring the deviation angle
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[0020] combine figure 1 , the solution concentration optical measurement device based on linear array CCD comprises laser light source 11, linear array CCD chip 7, circuit unit 3 (comprising: CCD driver, data acquisition and processing and data transmission function), airtight box 4 and 5, prism group 6. Semi-reflective semi-lens sheet 8, reflector 10, black isolation surface 9. The linear array CCD chip 7 is embedded in the slot with a width slightly larger than the width of the CCD chip 7 on the side surface of the airtight box 4 , and the gap between the slot and the CCD chip 7 is sealed on both sides inside and outside the airtight box 4 . Laser light source 11, semi-reflective half-lens sheet 8, reflective mirror 10 are airtight in transparent casing 5 (or this casing has transparent window), and semi-reflective semi-lens sheet 8, reflective mirror 10 are coated with semi-reflective semi-transparent film and silver respectively. , the airtight box 4 is placed in the cont...
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The invention provides differential solution concentration measuring device and method. Laser is used as a light source, and a semi-reflective and semi-transparent lens and a reflector are utilized to divide an incidence beam into two parallel beams which respectively enter the same sides of a prism pair in opposite positions in a prism set by liquid, are emitted from the other side of the prism set and finally received by a linear array CCD through the liquid. When the concentration changes, the refraction angle of the incidence light changes in the prism and causes the deflection angle of the emergent beam changes accordingly so that the image spot of a beam emitted from the other end of the prism changes the position on the CCD. After the corresponding relation between the positions relation of the two image spots on the CCD and the solution concentration is established, the concentration of the liquid is measured. The invention has the shared advantage of differential measurement technology as well as stable and reliable measuring result and easy distribution, can measure the change of the solution concentration in real time and can work in adheres industrial environment, suchas causticity, and the like.
Description
(1) Technical field [0001] The invention relates to a solution concentration measurement method and device, in particular to a differential solution concentration optical measurement method and measurement device based on a linear array CCD and a prism group. (2) Background technology [0002] In petroleum, chemical industry, metallurgy, food, medicine and other industrial fields, it is necessary to measure the concentration of the solution. In the traditional optical measurement method of solution concentration, the measurement range of Abbe refractometer is relatively small, and online and automatic measurement cannot be realized; while the concentration measurement with polarimeter is only suitable for optically active solutions, and online and automatic measurement cannot be realized. , because it depends on the human eye to judge whether the brightness of the three-point field of view is the same, it is easy to produce large errors. [0003] With the advancement of mod...
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IPC IPC(8): G01N21/41G01N21/01
Inventor 温强王伟强邵永丰杨依珍姜富强
Owner HARBIN ENG UNIV