Measurement method for chlorophyll content in cucumber leaves based on RGB chlorophyll meter
A chlorophyll content and chlorophyll meter technology, applied in transmittance measurement and other directions, can solve the problems of low measurement accuracy and limited absorbance information, and achieve the effect of simple light source, accurate and relatively accurate chlorophyll content measurement
Inactive Publication Date: 2011-07-27
TIANJIN UNIV
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Because the SPAD502 only uses two bands of light to measure, the absorbance information obtained is limited, so the measurement accuracy is low
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[0025] The present invention will be further described below in conjunction with drawings and embodiments.
[0026] (1) Functional modules and circuits of the instrument
[0027] The chlorophyll measuring instrument of this example has a structure such as figure 1 As shown, it includes LED light source module, digital signal sensor module, digital signal processing control module, U disk data storage module, LCD liquid crystal display module, and the mechanical structure part of the instrument. The test light source is a full-band white LED, and the light source module is used to drive the LED to make the LED emit a stable test white light; the test white light hits the plant leaves vertically and passes through the plant leaves to be received by the main chip TCS230 of the digital signal sensor module. TCS230 contains corresponding There are three kinds of filters for red light (R), green light (G) and blue light (B). The filters are selected in time-sharing, and the transmi...
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The invention belongs to the technical field of photoelectric measurement, relating to a chlorophyll measurement method based on RGB digital signals. The method comprises the following steps of: (1) according to a multiplex linear regression equation of chlorophyll content measurement in cucumber leaves, configuring parameters to a RGB chlorophyll meter and obtaining an embedded model of measuring the chlorophyll content by the chlorophyll meter: -34.54+13.79log10Rt-93.58log10Bt+56.51log10Gt=y, wherein Rt is transmitted red light intensity frequency, Gt is transmitted green light intensity frequency, Bt is transmitted blue light intensity frequency, and y is chlorophyll content in cucumber leaves; (2) measuring cucumber leaves to be measured by the RGB chlorophyll meter so as to obtain chlorophyll content and frequency signals of red light, green light and blue light; and (3) calculating chlorophyll content by the RGB chlorophyll meter according to the embedded model. The method has the characteristics of simple and stable lighting source, relatively accurate measured chlorophyll content and the like.
Description
technical field [0001] The invention belongs to the technical field of photoelectric measurement, and relates to a method for measuring the chlorophyll content of cucumber leaves. Background technique [0002] Chlorophyll is the material basis for photosynthesis of green plants and an important indicator for the study of plant growth, physiological metabolism and nutritional status. Determining the chlorophyll content of plant leaves can provide scientific basis for studying plant physiological characteristics, recommending nitrogen fertilizer application, tapping production potential and variety resources, etc. The determination of chlorophyll content in plant leaves mainly includes chemical analysis method, computer vision method and chlorophyll meter method. Chemical analysis is a quantitative method with high precision, but the preparation of chlorophyll solution needs to grind the leaves, which is time-consuming and laborious, and destroys the leaf tissue, so it is onl...
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IPC IPC(8): G01N21/59
Inventor 何明霞张素娟李进才李萌王璞张旭
Owner TIANJIN UNIV