Soil respiration monitoring device and method based on tunable semiconductor laser absorption

By utilizing a soil respiration monitoring device based on tunable semiconductor laser absorption and employing the design of a connecting unit and a lifting unit, the problems of concentration gradient attenuation, pressure disturbance, and spatial heterogeneity in soil respiration monitoring are solved, achieving high-precision, long-term, multi-point monitoring that is adaptable to complex environments.

CN121068533APending Publication Date: 2025-12-05ZHEJIANG FORESTRY UNIVERSITY
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Patent Information

Application Number
CN202511066762.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-31
Publication Date
2025-12-05

AI Technical Summary

Technical Problem

Existing soil respiration monitoring devices suffer from problems such as concentration gradient decay, pressure disturbance error, spatial heterogeneity limitations, low system integration, and insufficient automation, making it difficult to achieve high-precision, long-term, and multi-point soil respiration monitoring.

Method used

A soil respiration monitoring device based on tunable semiconductor laser absorption is adopted. Through the design of the connecting unit and the lifting unit, the selective connection and lifting drive of the spectral detection unit with multiple respiration chambers are realized. Combined with the data processing module, the average value of the detection data of multiple respiration chambers is calculated to improve the monitoring accuracy. The processing components can adapt to complex environments.

Benefits of technology

It solves the problem of underestimation caused by the decrease in carbon dioxide concentration gradient in the gas chamber, reduces the error introduced by pressure difference, adapts to different terrains, improves the adaptability and accuracy of multi-point monitoring, and realizes high-precision and long-term soil respiration monitoring.

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Abstract

The invention relates to the technical field of soil respiration monitoring, and discloses a soil respiration monitoring device and method based on tunable semiconductor laser absorption.The device comprises a movable base which is hollow, the top of the base is fixedly connected with a top plate through a support, and a data controller is installed at the top of the base; and a plurality of breathing chambers are arranged between the base and the top plate. According to the soil respiration monitoring device and method based on tunable semiconductor laser absorption, the communication unit is arranged and used for controlling the detection end of the spectrum detection unit, so that the detection end of the spectrum detection unit is selectively connected with one respiration chamber or is sequentially connected with other respiration chambers; according to the soil respiration monitoring system, internal detection work of a single respiration chamber or internal detection work of multiple respiration chambers is formed, and the soil respiration monitoring accuracy can be further improved by calculating the average value of the internal detection data of the multiple respiration chambers.
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