Nondestructive detection device and method of water content of reflective near infrared plant leaf
A technology for non-destructive testing of plant leaves, applied in the measurement of scattering characteristics, etc., can solve the problems of high price, heavy weight, and large size of the instrument, and achieve the effects of easy portability, light weight and small size
Inactive Publication Date: 2011-02-09
CHINA AGRI UNIV
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However, using continuous spectrum (with multiple wavelength points) to analyze the water content of leaves, the instruments used are large in size, heavy in weight and expensive, and are only suitable for use in laboratories.
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[0049] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0050] The core idea of the present invention is to adopt reflection method, use LED light source, optical frequency converter, and single-chip microcomputer system with wavelength in the short-wave near-infrared region to form a reflective near-infrared non-destructive detection device for water content in plant leaves. 970nm and reference wavelength 900nm, measure the reflectance of plant leaves at these two wavelengths, obtain the water index, use the least square method to determine the quantitative relationship between the water content of plant leaves and the water index, and non-destructively detect the water content of plant leaves .
[0051] figure 1 It is a s...
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Abstract
The invention discloses nondestructive detection device and method of the water content of reflective near infrared plant leaves. The nondestructive detection device comprises a singlechip, a light source, a detector, a display, a keyboard and a sample room, wherein the light source is connected with the singlechip, and the sample room is respectively connected with the light source and the detector. The invention adopts a reflection method and uses an LED (Light Emitting Diode) light source with a wavelength in a short-wave near infrared area, a light to frequency converter and a singlechip system to form the nondestructive detection device of the water content of reflective near infrared plant leaves. The nondestructive detection method comprises the following steps of: in a characteristic wavelength of 970nm and a reference wavelength of 900nm of leaf water absorption, measuring the reflectivity of the plant leaves in the two wavelengths, obtaining moisture indexes, using a least square method to determine the quantitative relation of the plant leaf water content and the moisture indexes, and nondestructively detecting the water content of the plant leaves. The nondestructive detection device has small volume and light weight, is convenient to carry and can quickly and nondestructively detect the water content of the plant leaves.
Description
technical field [0001] The invention relates to the technical field of crop water content detection in agricultural technology, in particular to a reflective near-infrared non-destructive detection device and method for water content of plant leaves. Background technique [0002] Water is the main component of crops. Water deficit directly affects the physiological and biochemical processes and morphological structure of plants, thus affecting the growth, yield and quality of plants. Crop water content is a very important parameter when agricultural producers decide whether or when to irrigate; when crop breeders breed drought-resistant crops; when agronomists study the impact of water stress on crop growth and yield ; and physiological ecologists in the study of water stress on the physiological and biochemical processes; need to determine this parameter. Quantitative and rapid acquisition of plant water content plays an important role in the assessment of agriculture, hor...
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Inventor 吉海彦贾建楠
Owner CHINA AGRI UNIV