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CN-224216551-U - Built-in soil respiration monitoring system capable of achieving multipoint joint synchronous measurement

CN224216551UCN 224216551 UCN224216551 UCN 224216551UCN-224216551-U

Abstract

The utility model discloses a built-in soil respiration monitoring system capable of synchronously measuring in a multipoint joint mode, which comprises an air chamber, an air chamber driving assembly, a driving shaft, a motor, an air chamber support, a driven shaft and a motion track, wherein the air chamber adopts a hemispherical structure, a light source module, a detection module and a temperature-humidity-pressure sensor are integrated in the air chamber, the light source module emits infrared light with fixed strength, the detection module receives light intensity signals and calculates a concentration value of CO 2 in a closed space of the air chamber, a sealed soil ring is tightly attached to the bottom end of the air chamber through a rubber sealing gasket to form the closed space, the air-permeability balance valve is used for maintaining the air pressure balance inside and outside the air chamber, the driving shaft is connected with the motor and the air chamber support to control the opening and closing of the air chamber, and the driven shaft is symmetrically distributed below the driving shaft to stabilize the motion track. The utility model adopts a built-in structure of the CO 2 gas analyzer, can directly measure in the gas chamber without an external gas circuit pipeline, can reduce gas transmission delay and quicken response time, can avoid the interference of external environment, can realize multi-point combined networking synchronous observation within about 10km of visual distance based on a LoRa center data acquisition controller, and simultaneously adopts a firm and durable shell to ensure that the system is suitable for soil respiration monitoring of various complex ecological systems so as to provide technical support for climate change research.

Inventors

  • SUN XIAOFENG
  • CHEN CHENG

Assignees

  • 北京华益瑞科技有限公司

Dates

Publication Date
20260508
Application Date
20250527

Claims (7)

  1. 1. A built-in soil respiration monitoring system capable of multipoint joint synchronous measurement, comprising: The air chamber adopts a hemispherical structure, a light source module, a detection module and a temperature, humidity and pressure sensor are integrated in the air chamber, the light source module emits infrared light with fixed intensity, the detection module receives a light intensity signal and calculates a concentration value of CO 2 in a closed space of the air chamber, and the temperature, humidity and pressure sensor acquires temperature, humidity and pressure data in real time; The sealed soil ring is fixed on the rectangular bottom plate and is of a cylindrical hollow structure, the bottom end of the sealed soil ring is inserted into soil, and the top end of the sealed soil ring is tightly attached to the bottom end of the air chamber through a rubber sealing gasket to form the closed space; A ventilation balance valve, is arranged outside the top of the air chamber, for maintaining the balance of the air pressure inside and outside the air chamber; The air chamber driving assembly comprises a driving shaft, a driven shaft and a case, wherein a motor/speed reducing mechanism, a position feedback module and a control module are arranged in the case, the driving shaft is connected with a motor and an air chamber support to control the opening and closing of the air chamber, and the driven shaft is symmetrically distributed below the driving shaft to stabilize a motion track.
  2. 2. The soil respiration monitoring system according to claim 1, characterized in that, And the LoRa center data acquisition controller is integrated in the case, is communicated with the plurality of monitoring nodes through the LoRa star topology network, synchronously acquires data of each node and uploads the data to the remote server through the 4G module.
  3. 3. The soil respiration monitoring system of claim 1, wherein the light source module and the detection module are provided with optical filters on their optical paths, and the detection module resolves the rate of change of the concentration of CO 2 based on beer-lambert law.
  4. 4. The soil respiration monitoring system according to claim 1, wherein the rubber gasket is made of silica gel, and the edge of the rubber gasket is provided with a zigzag structure to enhance the fit and sealing with the soil surface.
  5. 5. The soil respiration monitoring system of claim 1, wherein the motor/reduction mechanism is configured with an encoder and the position feedback module monitors the air chamber opening and closing angle in real time and feeds back to the control module.
  6. 6. The soil respiration monitoring system of claim 1, wherein the control module cooperates with the LoRa data acquisition controller to receive control instructions from the remote terminal and to parse the control instructions and transmit the parsed control instructions to the air chamber to control the actuation of the air chamber.
  7. 7. The soil respiration monitoring system of claim 1, wherein the base plate is stamped and formed of stainless steel and has a conical ground spike welded to the bottom thereof for fixation in the soil.

Description

Built-in soil respiration monitoring system capable of achieving multipoint joint synchronous measurement Technical Field The utility model relates to the technical field of soil respiration monitoring, in particular to a built-in soil respiration monitoring system capable of achieving multipoint joint synchronous measurement. Background Soil is one of the important components of the land ecosystem, the largest organic carbon reservoir of the land ecosystem. On a global scale, land soil organic carbon reserves are about 2 times that of an atmospheric carbon reservoir, and small changes in the carbon reservoir can cause large changes in the concentration of atmospheric carbon dioxide (CO 2), thereby affecting the global climate change process. Soil respiration is a process of releasing CO 2 by microorganisms and plant roots in soil through respiration, is a main output path of a soil carbon reservoir and is one of main circulation modes of carbon circulation, so that the method has important significance for accurately monitoring the soil respiration and evaluating climate change and researching the carbon circulation of an ecological system. The traditional soil gas monitoring device generally adopts an extraction gas collection structure, and has the following technical defects: 1. In the regional scale, communication modes such as Wi-Fi, zigBee and the like are adopted among the multipoint soil respiration monitoring systems, so that the problems of high power consumption, short distance, small observation range, asynchronous time and the like exist, and regional data acquisition is difficult to realize; 2. The soil respiration monitoring system based on the closed dynamic air chamber method mostly adopts the design of an air pump and an air extraction pipeline, the pipeline has a certain adsorption effect on CO 2, and meanwhile, the existence of the air extraction pipeline enables the measurement of a temperature-humidity pressure sensor and a gas analyzer in a measurement air chamber to have a certain time delay and hysteresis, so that the measurement accuracy is affected. Disclosure of utility model The utility model aims to provide a built-in soil respiration monitoring system capable of synchronously measuring by multi-point combination, so as to solve the problems in the prior art. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The built-in soil respiration monitoring system capable of carrying out multipoint joint synchronous measurement takes a CO 2 gas analyzer built in a gas chamber as a core, realizes multipoint joint networking synchronous observation within a visual distance of about 10km based on a LoRa center data acquisition controller, and adopts a firm and durable shell to enable the system to be suitable for soil respiration monitoring of various complex ecological systems, thereby providing technical support for climate change research. Meanwhile, the system has the functions of data remote downloading and transmission, so that the field workload is greatly reduced, and the working efficiency is improved. A built-in multipoint joint synchronous measurement soil respiration monitoring system, comprising: The air chamber adopts a hemispherical structure, a light source module, a detection module and a temperature, humidity and pressure sensor are integrated in the air chamber, the light source module emits infrared light with fixed intensity, the detection module receives a light intensity signal and calculates a concentration value of CO 2 in a closed space of the air chamber, and the temperature, humidity and pressure sensor acquires temperature, humidity and pressure data in real time; The soil sealing ring is fixed on the rectangular bottom plate and is of a cylindrical hollow structure, the bottom end of the soil sealing ring is inserted into soil, and the soil sealing ring and the bottom end of the air chamber are tightly attached through a rubber sealing gasket to form a closed space; A ventilation balance valve, is arranged outside the top of the air chamber, for maintaining the balance of the air pressure inside and outside the air chamber; The air chamber driving assembly comprises a driving shaft, a driven shaft and a case, wherein a motor/speed reducing mechanism, a position feedback module and a control module are arranged in the case, the driving shaft is connected with the motor and the air chamber support to control the opening and closing of the air chamber, and the driven shaft is symmetrically distributed below the driving shaft to stabilize the movement track. In some embodiments, the LoRa central data acquisition controller is integrated in the chassis, communicates with the plurality of monitoring nodes through the LoRa star topology network, synchronously acquires data of each node and uploads the data to the remote server through the 4G module. In some embodiments, the light path between the light source mod