Method and device for measuring turbidity of aqueous solution based on color coordinate value
A measurement method and technology of color coordinates, applied in the field of aqueous solution turbidity measurement methods and devices based on color coordinate values, to achieve the effect of large measurement range
Active Publication Date: 2018-10-12
安徽海博检测服务股份有限公司
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However, since the measurement is affected by changes in the incident raw light intensity and the drift of the light intensity detector, these systems need to be calibrated periodically; therefore, there is a need to find a better method for measuring turbidity so that it can achieve better measurements Effect
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[0047] Such as figure 1 In the aqueous solution turbidity measurement device shown, the pulsed xenon lamp 1 receives the synchronous pulse signal sent by the control circuit 10 and then emits visible light in the wavelength range of 380-760nm, which is transmitted by the optical fiber 2 and then becomes parallel light through the collimator lens 3 and enters the sample cell 4. After the incident light is absorbed and scattered in the sample cell 4, the outgoing light enters the optical fiber 6 through the converging lens 5, and finally the light intensity is collected by the spectrometer 7, and the data is processed by the processing unit 11.
[0048] Using the above-mentioned turbidity measuring device, the absorbance of the liquid in the sample cell 4 can be measured, and then the color coordinates of the solution can be calculated through the absorbance, so as to further obtain the turbidity of the solution, as follows:
[0049] The absorbance of the solution reflects the d...
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The invention discloses a water solution turbidity measurement method based on a color coordinate value. The water solution turbidity measurement method comprises the following steps: (1) emitting measuring light into a solution sample and acquiring the size of light intensity of emergent light; (2) calculating the absorbance of the solution according to the light intensity of the incident light and the emergent light; (3) based on the absorbance of the solution, combining a color matching function and spectral energy distribution of the measuring light to obtain color tristimulus values; (4) carrying out normalization processing on the color tristimulus values and calculating to obtain solution color coordinates xyz; and (5) according to a relation between the solution color coordinates xyz and a turbidity value, calculating the turbidity value of the solution. The invention further discloses a water solution turbidity measurement device based on the color coordinate value. The influences on the water solution turbidity measurement method and device by the change of the light intensity of a light source and the response change of a spectrograph are extremely small, so that the device does not need to be frequently calibrated in a long-time online measurement process.
Description
technical field [0001] The invention relates to the field of measurement of aqueous solution turbidity, in particular to an aqueous solution turbidity measurement method and device based on color coordinate values. Background technique [0002] Turbidity is an important index to evaluate the quality of aqueous solution, representing the cleanliness of the liquid. It can also characterize the pollution and eutrophication of water bodies. When the turbidity value of the water body is very low, the transmission of protozoa will be greatly reduced. Excessive discharge of wastewater and excessive growth of algae can be detected by regular monitoring of turbidity. Not only that, the application field of turbidity measurement is quite broad. [0003] For the measurement of turbidity, for example, the turbidimeter disclosed in the patent application with publication number CN103822876A includes a housing on which a light source device, an optical path absorption pool, an optical ...
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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 王晓萍文一章胡映天
Owner 安徽海博检测服务股份有限公司