In-situ detection device and method for carbon emissions from farmland

1 . An in-situ detection device for carbon emissions from farmland, comprising:

an unmanned aerial vehicle;

a landing gear having an enrichment hood installed on the landing gear through a folding mechanism and a greenhouse gas detection system, the folding mechanism being capable of driving the enrichment hood to be unfolded or folded on the landing gear, and the greenhouse gas detection mechanism is configured to detect gas enriched in the enrichment hood; and

a retraction and release mechanism arranged between the unmanned aerial vehicle and the landing gear, the retraction and release mechanism retracts or lowers the landing gear;

wherein when the unmanned aerial vehicle lowers the landing gear to a farmland gas collection point through the retraction and release mechanism, the enrichment hood is unfolded to enrich a gas at the farmland gas collection point.

2 . The in-situ detection device for carbon emissions from farmland according to claim 1 , wherein the landing gear further comprises:

two transverse columns horizontally arranged side by side, and

a vertical bracket arranged between the two transverse columns and having two ends which are fixed to middle parts of the two transvers columns, respectively;

the folding mechanism further comprises:

at least two groups of rotating brackets each having two ends rotatably connected to the middle parts of the two transverse columns, respectively, the vertical bracket and each group of the rotating brackets are both of an arch structure and a top of the arch structure of the vertical bracket is connected to a bottom of the unmanned aerial vehicle through the retraction and release mechanism; and

a drive part configured to drive the rotating bracket to rotate, the enrichment hood being supported on the vertical bracket and the rotating bracket, and the drive part via the rotating bracket drives the enrichment hood to be unfolded or folded;

wherein the at least two groups of rotating brackets are arranged on two sides of the vertical bracket, respectively.

3 . The in-situ detection device for carbon emissions from farmland according to claim 2 , wherein one end of the rotating bracket is a driving end, and an other end of the rotating bracket is a driven end;

the drive part further comprises a servo motor and a rotating shaft, the servo motor is arranged at a position, close to the driving end of the rotating bracket, on the landing gear, and an output end of the servo motor is connected to the driving end of the rotating bracket through the rotating shaft.

4 . The in-situ detection device for carbon emissions from farmland according to claim 3 , wherein the enrichment hood is a plastic film.

5 . The in-situ detection device for carbon emissions from farmland according to claim 2 , wherein the retraction and release mechanism further comprises a retraction and release motor arranged at the bottom of the unmanned aerial vehicle and a hanging rope having one end connected to an output end of the retraction and release motor, and an other end connected to the arch top of the vertical bracket.

6 . The in-situ detection device for carbon emissions from farmland according to claim 5 , wherein the enrichment hood is a plastic film.

7 . The in-situ detection device for carbon emissions from farmland according to claim 2 , wherein the greenhouse gas detection mechanism is arranged at the arch top of the vertical bracket, and the greenhouse gas detection mechanism comprises an exhaust pipe, a gas extracting pump and a greenhouse gas detection sensor which are in sequential communication, a gas inlet of the exhaust pipe is in communication with the enrichment hood, and the gas extracting pump is configured to pump gas in the enrichment hood into the greenhouse gas detection sensor, thus detecting the gas in the enrichment hood.

8 . The in-situ detection device for carbon emissions from farmland according to claim 7 , wherein the enrichment hood is a plastic film.

9 . The in-situ detection device for carbon emissions from farmland according to claim 2 , wherein the enrichment hood is a plastic film.

10 . The in-situ detection device for carbon emissions from farmland according to claim 1 , wherein the unmanned aerial vehicle is a multi-rotor unmanned aerial vehicle.

11 . The in-situ detection device for carbon emissions from farmland according to claim 10 , wherein the enrichment hood is a plastic film.

12 . The in-situ detection device for carbon emissions from farmland according to claim 1 , wherein the enrichment hood is a plastic film.

13 . An in-situ detection method for carbon emissions from farmland, wherein the in-situ detection device for carbon emissions from farmland according to claim 1 is adopted, and the method comprises:

uploading position coordinates of a farmland gas collection point to an unmanned aerial vehicle, and making a flight plan for the unmanned aerial vehicle;

enabling the unmanned aerial vehicle to take off and fly to the farmland gas collection point, lowering a landing gear through a retraction and release mechanism, unfolding an enrichment hood through a folding mechanism, and enriching a gas at the farmland gas collection point through the enrichment hood;

after reaching a required enrichment time, detecting the gas enriched in the enrichment hood through a greenhouse gas detection mechanism;

after finishing the detection, folding the enrichment hood through the folding mechanism, and retracting the landing gear through the retraction and release mechanism; and

enabling the unmanned aerial vehicle to return or fly to a next farmland gas collection point, and repeatedly carrying out the steps two to four.