A Plant Ecological Monitoring System Based on Optical Frequency Comb

Abstract

The invention discloses a plant ecological monitoring system based on an optical frequency comb, which includes an optical frequency comb light source module, an optical monitoring module, a detector module, a data acquisition and processing module, and a clock synchronization module. The output of the optical frequency comb light source module has a repetition frequency Poor monitoring light and reference light, the monitoring light acts on the monitoring object after adjusting the power, wavelength and light beam of the optical monitoring module, the detector module receives the monitoring light reflected by the monitoring object, and the detector module detects the returned monitoring light and reference light The beat frequency, data acquisition and processing module collects the beat frequency signal sent by the detector module, analyzes it and restores the absorption spectrum and shape characteristics of the monitored object in real time. The advantages of the present invention are: the plant ecological monitoring system has extremely fast measurement speed and high precision, can accurately reflect the growth form and physiological state of plants in real time, and provides sufficient and timely information for relevant instant decision-making in agricultural production, botany research and other related fields. accurate information model.

Description

technical field [0001] The invention belongs to the field of optical technology, and in particular relates to a plant ecological monitoring system based on an optical frequency comb. Background technique [0002] With the growth of plants, their overall morphology (branches, leaves, stems, stems, flowers, fruits) will change slowly. At the same time, affected by the growth environment, such as changes in temperature, climate, and soil nutrients, plant growth The composition of the gas produced during the process changes slightly. High-precision shape measurement of the plant growth process and high-precision analysis of the gas components generated during its environmental interaction are necessary means to accurately monitor the dynamic growth process, physiological changes, and physical signs of plants. At this stage, the means of shape monitoring mainly rely on laser radar dot scan or area array CCD imaging technology, and the analysis of gas composition mainly relies on...

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Problems solved by technology

[0003] The traditional technical means of measuring plant ecology cannot realize simultaneous measurement of plant morphology and analysis of spectral components, and separate measurement will bring a series of problems such as complex system, asynchronous measurement, and long measurement time

In addition, the point-matrix scanning measurement of lidar is limited by the scanning time of the scanning robot arm, which requires a certain measurement time and cannot achieve real-time restoration analysis

The disadvantage of area array CCD imaging technology is that the sensor array is complex and the accuracy is limited

Traditional spectral analysis instruments usually use spectral separation to measure and restore separately. The disadvantage is that the measurement efficiency is low and the measurement accuracy is limited.

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