A UAV greenhouse gas flux measurement device

Abstract

The present invention relates to a greenhouse gas flux measuring device for an unmanned aerial vehicle (UAV), comprising an UAV, wherein the UAV comprises a central frame, four arms, four flight power systems and a control system, wherein the four arms are connected to the central frame at intervals; a first fixed block, a second fixed block, a third fixed block, and a fourth fixed block, which are respectively arranged between two adjacent arms; a first greenhouse gas flux detector, which is arranged on the first fixed block; two protective members, wherein the protective members comprise a central portion, a first end, and a second end, and the central portions of the two protective members are respectively connected to the first fixed block and the third fixed block; in a first state, the movable blocks of the first ends of the two protective members are arranged along the outer sides of two adjacent arms, and the movable blocks of the second ends of the two protective members are arranged along the outer sides of the other two adjacent arms; in a second state, the first end and the second end of a protective member extend symmetrically to both sides of the first fixed block, so that it can take into account both flight resistance and detection accuracy of the first greenhouse gas flux detector.

Description

Technical Field

[0001] The present application relates to the technical field of greenhouse gas emissions. Background Art

[0002] Mangrove wetland ecosystems lie in a critical coastal zone at the interface between land and sea, combining characteristics of both marine and terrestrial ecosystems. They possess complex diversity, sensitivity, fragility, and exemplary ecological functions. A healthy ecosystem beneath mangroves is a prerequisite for maintaining the stability of mangrove wetlands, fulfilling their ecological functions, and achieving sustainable development. In addition to high primary productivity and low organic matter decomposition rates, mangroves have large root canopies, capable of storing large amounts of carbon, which is then transferred through the root system and stored in the soil. Mangrove intertidal wetlands have significant potential to mitigate carbon-containing greenhouse gas emissions and reduce the global warming effect.

[0003] Accurately monitoring greenhouse gas fluxes is crucial for understanding and responding to climate change. Traditional greenhouse gas monitoring methods typically rely on ground stations or satellite remote sensing technology. Ground station data may be limited by the distribution of monitoring points, while satellite remote sensing may be limited by resolution and cloud cover. UAV technology has developed rapidly in recent years, and its application in many fields such as agriculture, forestry, and environmental monitoring has become increasingly widespread. UAVs have the advantages of high flexibility, relatively low cost, and the ability to enter dangerous or difficult-to-reach areas. UAVs can carry a variety of sensors, including greenhouse gas flux detectors, for aerial monitoring. This enables them to cover wider areas, provide higher-resolution data, and respond quickly to emergencies.

[0004] In the process of realizing this application, the applicant of this application found that although drones have potential in monitoring greenhouse gases, they also face some technical challenges. For example, greenhouse gas flux detectors are easily interfered with by the flow field of the drone's flight power system during detection, resulting in inaccurate detection data of the greenhouse gas detectors. Summary of the Invention

[0005] In view of the above problems, the present application provides a UAV greenhouse gas flux measurement device, which overcomes the above problems or at least partially solves the above problems.

[0006] According to one aspect of an embodiment of the present application, a UAV greenhouse gas flux measuring device is provided, comprising a UAV, the UAV comprising a central frame, four arms, four flight power systems and a control system, the four arms being radially connected to the central frame with the central frame as the center, the arms being provided with through holes, the flight power systems corresponding to the through holes, the control system being connected to the central frame along a first direction, the first direction being parallel to the central axis of the central frame, the flight power system being connected to the control system; wherein the outer side of the arms is arc-shaped; a first fixed block, a second fixed block, a third fixed block, and a fourth fixed block are sequentially arranged between two adjacent arms along the circumference of the central frame; a first greenhouse gas flux detector is arranged on the first fixed block for detecting greenhouse gas flux; two protective members, the protective member comprising a central portion and a first end and a second end respectively arranged on both sides of the central portion, the central portion of one of the protective members being connected to the first A fixed block, the central part of the other protective member is connected to the third fixed block, the first end includes a plurality of movable blocks connected in sequence, and the second end includes a plurality of movable blocks connected in sequence; wherein, along the first direction, the protective member protrudes from the side of the central frame facing the control system, and along the first direction, the protective member protrudes from the side of the central frame away from the control system; the control system is used to control the two protective members to switch between the first state and the second state; in the first state, the plurality of movable blocks at the first ends of the two protective members are respectively arranged along the outer sides of two adjacent arms, and the plurality of movable blocks at the second ends of the two protective members are respectively arranged along the outer sides of the other two adjacent arms; in the second state, the first end and the second end of one of the protective members extend symmetrically to both sides of the first fixed block to protect the first greenhouse gas flux detector, wherein the first end and the second end of the other protective member extend symmetrically to both sides of the third fixed block.

[0007] In an optional manner, two adjacent arms are connected along the circumference of the center frame.

[0008] In an optional embodiment, the flight power system includes a first motor and a rotor, the first motor is arranged on the aircraft arm, the rotor is connected to the output shaft of the first motor, and the rotor is located in the through hole.

[0009] In an optional embodiment, the UAV greenhouse gas flux measurement device also includes a wireless communication module, which is connected to the control system, and the first greenhouse gas flux detector is connected to the control system. The wireless communication module is used to send the data detected by the first greenhouse gas flux detector to the ground station.

[0010] In an optional manner, the UAV greenhouse gas flux measurement device further includes a second greenhouse gas flux detector, which is arranged on the third fixed block and is used to detect the greenhouse gas flux.

[0011] In an optional embodiment, the UAV greenhouse gas flux measuring device also includes four groups of traction ropes; one end of one group of traction ropes is connected to the first fixed block and can be retracted and released by the first fixed block, and the other end thereof is connected to the second fixed block after passing through multiple movable blocks at the first end of a protective element in sequence, and can be retracted and released by the second fixed block, so that the first end of a protective element can be switched between the first state and the second state; one end of one group of traction ropes is connected to the first fixed block and can be retracted and released by the first fixed block, and the other end thereof is connected to the fourth fixed block after passing through multiple movable blocks at the second end of a protective element in sequence, and can be retracted and released by the fourth fixed block, so that the second end of a protective element can be switched between the first state and the second state. The first state and the second state are switched between the first state and the second state; one end of a group of traction ropes is connected to the third fixed block and can be retracted and released by the third fixed block, and the other end thereof passes through the multiple movable blocks at the first end of the other protective element in sequence and is connected to the second fixed block, and can be retracted and released by the second fixed block, so that the first end of the other protective element is switched between the first state and the second state; one end of a group of traction ropes is connected to the third fixed block and can be retracted and released by the third fixed block, and the other end thereof passes through the multiple movable blocks at the second end of the other protective element in sequence and is connected to the fourth fixed block, and can be retracted and released by the fourth fixed block, so that the second end of the other protective element is switched between the first state and the second state.

[0012] In an optional manner, a second motor is respectively provided in the first fixed block, the second fixed block, the third fixed block and the fourth fixed block, and the second motor is used to control the retraction and release of the traction rope.

[0013] In an optional manner, the number of the traction ropes in a group is two.

[0014] In an optional manner, along the circumference of the center frame, the cross section of the movable block is trapezoidal, so that the protective element is arc-shaped when in the second state.

[0015] In an optional manner, the tail of the first end and the tail of the second end are both provided with a first magnetic member, and the second fixed block and the fourth fixed block are both provided with a second magnetic member, so that when the protective member is in the first state, the first magnetic member is magnetically connected to the second magnetic member.

[0016] The beneficial effects of the embodiments of the present application include: providing a UAV greenhouse gas flux measurement device, including a UAV, the UAV including a central frame, four arms, four flight power systems and a control system, the four arms being radially connected to the central frame with the central frame as the center, the arms being provided with through holes, the flight power systems corresponding to the through holes, the control system being connected to the central frame along a first direction, the first direction being parallel to the central axis of the central frame, the flight power system being connected to the control system; wherein the outer side of the arms is arc-shaped; a first fixed block, a second fixed block, a third fixed block, and a fourth fixed block are sequentially arranged between two adjacent arms along the circumference of the central frame; a first greenhouse gas flux detector is arranged on the first fixed block for detecting greenhouse gas flux; two protective members, the protective member including a central portion and a first end and a second end respectively arranged on both sides of the central portion, the central portion of one of the protective members being connected to the first A fixed block, the central part of the other protective member is connected to the third fixed block, the first end includes a plurality of movable blocks connected in sequence, and the second end includes a plurality of movable blocks connected in sequence; wherein, along the first direction, the protective member protrudes from the side of the central frame facing the control system, and along the first direction, the protective member protrudes from the side of the central frame away from the control system; the control system is used to control the two protective members to switch between the first state and the second state; in the first state, the plurality of movable blocks at the first ends of the two protective members are respectively arranged along the outer sides of two adjacent arms, and the plurality of movable blocks at the second ends of the two protective members are respectively arranged along the outer sides of the other two adjacent arms; in the second state, the first end and the second end of one of the protective members extend symmetrically to both sides of the first fixed block to protect the first greenhouse gas flux detector, wherein the first end and the second end of the other protective member extend symmetrically to both sides of the third fixed block. With the above-mentioned unmanned aerial vehicle greenhouse gas flux measurement device, when the protective element is in the first state, the protective element is retracted outside the arm, reducing the flight resistance of the unmanned aerial vehicle; when the protective element is in the second state, the protective element protects the first greenhouse gas flux detector, reducing the interference of the flow field of the flight power system on the first greenhouse gas flux detector, and improving the accuracy of its greenhouse gas flux detection; that is, by changing the state of the protective element, the unmanned aerial vehicle greenhouse gas flux measurement device can take into account both the flight resistance and the detection accuracy of the first greenhouse gas flux detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 Schematic diagram of a protective element in a UAV greenhouse gas flux measurement device provided by an embodiment of the present application in a first state;

[0019] Figure 2 This is a schematic diagram of the control system provided by the embodiment of the present application connecting various components;

[0020] Figure 3 Schematic diagram of a protective element in a UAV greenhouse gas flux measurement device provided by an embodiment of the present application in a first state;

[0021] Figure 4 The embodiment of this application provides Figure 3 The corresponding main view;

[0022] Figure 5 Schematic diagram of the drone provided in an embodiment of the present application.

[0023] The reference numerals are as follows:

[0024] UAV greenhouse gas flux measurement device 100;

[0025] UAV 5, first fixing block 1, second fixing block 2, third fixing block 3, fourth fixing block 4, first greenhouse gas flux detector 6, protective element 7, wireless communication module 8, second greenhouse gas flux detector 9, traction rope 10, second motor 12;

[0026] Center frame 51, four arms 52, flight power system 53, control system 54;

[0027] through hole 521;

[0028] First motor 531, rotor 532, support rod 533;

[0029] Central portion 71, first end 72, second end 73, movable block 7s;

[0030] The first direction L1 is the circumferential direction C1 of the center frame. DETAILED DESCRIPTION

[0031] In order to facilitate understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0033] Please also refer to Figures 1 to 4 The UAV greenhouse gas flux measuring device 100 includes: a UAV 5, the UAV 5 includes a central frame 51, four arms 52, four flight power systems 53 and a control system 54, the four arms 52 are radially connected to the central frame 51 with the central frame 51 as the center, the arms 52 are provided with through holes 521, the flight power systems 53 correspond to the through holes 521, the control system 54 is connected to the central frame 51 along a first direction L1, the first direction L1 is parallel to the central axis of the central frame 51, the flight power system 53 is connected to the control system 54; wherein the outer side of the arm 52 is arc-shaped; the first fixing block 1, the second fixing block 1 Block 2, third fixed block 3, fourth fixed block 4, along the circumferential direction C1 of the center frame 51, are sequentially arranged between two adjacent arms 52; a first greenhouse gas flux detector 6 is arranged on the first fixed block 1, for detecting the greenhouse gas flux; two protective members 7, the protective member 7 includes a central portion 71 and a first end 72 and a second end 73 respectively arranged on both sides of the central portion 71, the central portion 71 of one protective member 7 is connected to the first fixed block 1, and the central portion 71 of the other protective member 7 is connected to the third fixed block 3, the first end 72 includes a plurality of movable blocks 7s connected in sequence, and the second end 73 includes a plurality of movable blocks 7s connected in sequence; wherein, please refer to Figure 4 , along the first direction L1, the protective member 7 is protruding from the side of the central frame 51 facing the control system 54, and along the first direction L1, the protective member 7 is protruding from the side of the central frame 51 away from the control system 54; the control system 54 is used to control the two protective members 7 to switch between the first state and the second state; in the first state (such as Figure 1 As shown), the multiple movable blocks 7s of the first ends 72 of the two protective members 7 are arranged along the outer sides of the two adjacent arms 52, and the multiple movable blocks 7s of the second ends 73 of the two protective members 7 are arranged along the outer sides of the other two adjacent arms 52; in the second state (as shown), Figure 3As shown), the first end 72 and the second end 73 of one of the protective members 7 extend symmetrically to both sides of the first fixed block 1 to protect the first greenhouse gas flux detector 6, and the first end 72 and the second end 73 of the other protective member 7 extend symmetrically to both sides of the third fixed block 3.

[0034] When the protective element 7 is in the first state (e.g., Figure 1 As shown), the protective member 7 is retracted outside the arm 52 to reduce the flight resistance of the drone 5. When the protective member 7 is in the second state (as shown Figure 3 As shown), the protective member 7 protects the first greenhouse gas flux detector 6, reduces the interference of the flow field of the flight power system 53 on the first greenhouse gas flux detector 6, and improves the accuracy of its greenhouse gas flux detection; that is, by changing the state of the protective member 7, the UAV greenhouse gas flux measurement device 100 can take into account both the flight resistance and the detection accuracy of the first greenhouse gas flux detector 6.

[0035] The drone 5 is equipped with a central frame 51, four arms 52, four flight propulsion systems 53, and a control system 54. The four arms 52 are radially connected to the central frame 51, thereby increasing the stability of the drone 5 during flight. The arms 52 are provided with through-holes 521, and the flight propulsion systems 53 correspond to these through-holes 521. The flight propulsion systems 53 are used to provide power to the drone 5 during flight. The control system 54 is connected to the central frame 51 along the first direction L1. The control system 54 serves as the control center of the drone greenhouse gas flux measurement device 100 and is connected to the flight propulsion systems 53 to control their operation.

[0036] Regarding the arm 52, the outer side of the arm 52 is in an arc shape, which can reduce the resistance of the UAV 5 during flight, and on the other hand, the arc-shaped arm 52 can facilitate the protective element 7 to cover and form the first state (such as Figure 1 As shown), on the other hand, the arc-shaped arm 52 can increase the uniform distribution of the flow field around the flight power system 53, thereby improving the stability of the UAV 5.

[0037] It is worth noting that, in some embodiments, two adjacent arms 52 are connected along the circumferential direction C1 of the center frame 51 , so that the connection structure between the arms 52 and the center frame 51 is compact, which can further reduce the resistance of the drone 5 during flight.

[0038] For the above mentioned flight power system 53, see Figure 5In some embodiments, the flight power system 53 includes a first motor 531 and a rotor 532 . The first motor 531 is disposed on the arm 52 . The rotor 532 is connected to the output shaft of the first motor 531 . The rotor 532 is located in the through hole 521 .

[0039] It can be understood that the first motor 531 is connected to the control system 54 , and the control system 54 is used to control the operation of the first motor 531 .

[0040] It is worth noting that, in some embodiments, the flight power system 53 further includes a support rod 533 , one end of the support rod 533 is connected to the arm 52 , the other end of the support rod 533 extends to the through hole 521 , and the first motor 531 is arranged at the other end of the support rod 533 .

[0041] As for the first fixing block 1, the second fixing block 2, the third fixing block 3, and the fourth fixing block 4, they are sequentially arranged between two adjacent arms 52 along the circumferential direction C1 of the central frame 51, that is, the first fixing block 1 and the third fixing block 3 are symmetrically arranged, and the second fixing block 2 and the fourth fixing block 4 are symmetrically arranged. The first fixing block 1, the second fixing block 2, the third fixing block 3, and the fourth fixing block 4 are used for connecting the protective member 7.

[0042] As for the first greenhouse gas flux detector 6 , the first greenhouse gas flux detector 6 is provided on the first fixing block 1 and is used to detect the greenhouse gas flux.

[0043] In some embodiments, the UAV greenhouse gas flux measurement device 100 also includes a wireless communication module 8, which is connected to the control system 54, and the first greenhouse gas flux detector 6 is connected to the control system 54. The wireless communication module 8 is used to send the data detected by the first greenhouse gas flux detector 6 to the ground station.

[0044] In some embodiments, the wireless communication module 8 uses a variety of methods including a digital radio, a Wi-Fi wireless module, or a mobile network data transmission module to send the data detected by the first greenhouse gas flux detector 6 to the ground station.

[0045] It is worth noting that, in some embodiments, the UAV greenhouse gas flux measurement device 100 further includes a second greenhouse gas flux detector 9, which is provided on the third fixed block 3 for detecting the greenhouse gas flux. Since the first fixed block 1 and the third fixed block 3 are symmetrically arranged, the first greenhouse gas flux detector 6 and the second greenhouse gas flux detector 9 are symmetrically arranged. By further providing the second greenhouse gas flux detector 9, on the one hand, it can cooperate with the first greenhouse gas flux detector 6 to balance the weight and increase the stability of the UAV 5. On the other hand, the greenhouse gas flux can be tested separately by the two greenhouse gas flux detectors, and the accuracy of the greenhouse gas flux detection can be improved by taking the average value of the two. On the other hand, when one of the greenhouse gas flux detectors fails, the other greenhouse gas flux detector can still work, thereby ensuring the number of greenhouse gas flux detection data.

[0046] Regarding the above-mentioned two protective members 7, the protective members 7 include a central portion 71 and a first end 72 and a second end 73 respectively arranged on both sides of the central portion 71. The central portion 71 of one protective member 7 is connected to the first fixed block 1, and the central portion 71 of the other protective member 7 is connected to the third fixed block 3. The first end 72 includes a plurality of movable blocks 7s connected in sequence, and the second end 73 includes a plurality of movable blocks 7s connected in sequence. By setting up two of the protective members 7, since the first fixed block 1 and the third fixed block 3 are symmetrically arranged, the two protective members are symmetrically arranged, so that the stability of the drone 5 can be improved whether it is flying or hovering.

[0047] The control system 54 is used to control the two protective elements 7 to switch between the first state and the second state; Figure 1 As shown), the multiple movable blocks 7s of the first ends 72 of the two protective members 7 are arranged along the outer sides of the two adjacent arms 52, and the multiple movable blocks 7s of the second ends 73 of the two protective members 7 are arranged along the outer sides of the other two adjacent arms 52; in the second state (as shown), Figure 3As shown), the first end 72 and the second end 73 of one of the protective members 7 extend symmetrically to both sides of the first fixed block 1 to protect the first greenhouse gas flux detector 6, and the first end 72 and the second end 73 of the other protective member 7 extend symmetrically to both sides of the third fixed block 3 to protect the second greenhouse gas flux detector 9. In the first direction L1, the protective member 7 protrudes from the side of the central frame 51 facing the control system 54, and in the first direction L1, the protective member 7 protrudes from the side of the central frame 51 away from the control system 54, that is, in the first direction L1, the size of the protective member 7 is larger than the machine arm 52, so that in the second state (as shown in FIG. Figure 3 (as shown), the interference of the flow field of the flight power system 53 of the UAV 5 on the detection accuracy of the first greenhouse gas flux detector 6 and the detection accuracy of the second greenhouse gas flux detector 9 can be reduced. Specifically, the flow field originally acting on the outside of the arm 52 is blocked and protected by the protective member 7, so that the flow field is moved away from the outside of the arm 52, that is, away from the first greenhouse gas flux detector 6 installed on the first fixing block 1, and away from the second greenhouse gas flux detector 9 installed on the third fixing block 3. This reduces the interference of the flight power system 53 on the gas surrounding the first greenhouse gas flux detector 6 installed on the first fixing block 1, and ensures that the gas surrounding the first greenhouse gas flux detector 6 approximates the original gas concentration and state of the target detection area, thereby improving the greenhouse gas flux detection accuracy of the first greenhouse gas flux detector 6. Similarly, the protective member 7 can reduce the interference of the flight power system 53 on the gas around the second greenhouse gas flux detector 9 set on the third fixed block 3, so that the gas around the second greenhouse gas flux detector 9 is close to the original gas concentration and state of the target detection area, thereby improving the detection accuracy of the greenhouse gas flux by the second greenhouse gas flux detector 9.

[0048] It is worth noting that, in some embodiments, when the UAV 5 is hovering, the control system 54 controls the protective element 7 to be in the second state (eg Figure 3 As shown), at this time, the first greenhouse gas flux detector 6 works to detect the greenhouse gas flux data, thereby reducing the interference of the drone 5 during flight and further improving the accuracy of the first greenhouse gas flux detector 6 in detecting the greenhouse gas flux. Similarly, the control system 54 controls the protective element 7 to be in the second state (as shown). Figure 3 As shown), at this time, the second greenhouse gas flux detector 9 works to detect the data of the greenhouse gas flux, thereby reducing the interference of the drone 5 during flight and further improving the accuracy of the second greenhouse gas flux detector 9 in detecting the greenhouse gas flux.

[0049] In addition, when the first state (such as Figure 1 As shown in FIG. 5 , the protective member 7 is retracted within the arm 52 and wrapped around the arc-shaped outer portion of the arm 52, thereby reducing flight resistance during flight of the drone 5. Specifically, by providing the protective member 7 and switching between the first and second states, the flight resistance of the drone 5 can be balanced, thereby saving power consumption and protecting the first greenhouse gas flux detection, thereby improving the detection accuracy of the greenhouse gas flux.

[0050] In some embodiments, see Figure 1 , the UAV greenhouse gas flux measuring device 100 also includes four groups of traction ropes 10, one end of which is connected to the first fixed block 1 and can be retracted and released by the first fixed block 1, and the other end of which is connected to the second fixed block 2 after passing through a plurality of the movable blocks 7s of the first end 72 of the protective member 7 in sequence, and can be retracted and released by the second fixed block 2, so that the first end 72 of the protective member 7 can be switched between the first state and the second state; one end of which is connected to the first fixed block 1 and can be retracted and released by the first fixed block 1, and the other end of which is connected to the fourth fixed block 4 after passing through a plurality of the movable blocks 7s of the second end 73 of the protective member 7 in sequence, and can be retracted and released by the fourth fixed block 4, so that the second end 73 of the protective member 7 can be switched between the first state and the second state. Switching between a first state and a second state; one end of a group of traction ropes 10 is connected to the third fixed block 3 and can be retracted and released by the third fixed block 3, and the other end thereof passes through multiple movable blocks 7s of the first end 72 of another protective member 7 in sequence and is connected to the second fixed block 2, and can be retracted and released by the second fixed block 2, so that the first end 72 of the other protective member 7 switches between the first state and the second state; one end of a group of traction ropes 10 is connected to the third fixed block 3 and can be retracted and released by the third fixed block 3, and the other end thereof passes through multiple movable blocks 7s of the second end 73 of the other protective member 7 in sequence and is connected to the fourth fixed block 4, and can be retracted and released by the fourth fixed block 4, so that the second end 73 of the other protective member 7 switches between the first state and the second state.

[0051] In some embodiments, a second motor 12 is respectively provided in the first fixed block 1, the second fixed block 2, the third fixed block 3 and the fourth fixed block 4, the output shaft of the second motor 12 is connected to the traction rope 10, the second motor 12 is used to control the retraction and release of the traction rope 10, the second motor 12 is connected to the control system 54, and the control system 54 is used to control the operation of the second motor 12.

[0052] For the convenience of understanding, the first end 72 of the protective member 7 between the first fixed block 1 and the second fixed block 2 is taken as an example to illustrate the switching mode between the first state and the second state. When the second motor 12 in the first fixed block 1 retracts the traction rope 10, the movable block 7s at the tail of the first end 72 moves away from the machine arm 52. As the second motor 12 in the first fixed block 1 continues to retract the traction rope 10, the multiple movable blocks 7s continue to move toward the first fixed block 1 and abut against each other, and the traction rope 10 is tightened to form a Figure 3 When the protective member 7 is in the second state, the second motor 12 in the first fixed block 1 releases the traction rope 10, and the second motor 12 in the second fixed block 2 retracts the traction rope 10, the movable block 7s at the tail of the first end 72 approaches the machine arm 52, and the multiple movable blocks 7s no longer abut against each other, and the multiple movable blocks 7s wrap the machine arm 52, forming a Figure 1 The first state.

[0053] In some embodiments, the number of the traction ropes 10 in a group is two, so as to enhance the stability of the protective element 7 when switching between the first state and the second state.

[0054] In some embodiments, see Figure 1 or Figure 3 , along the circumferential direction C1 of the center frame 51, the cross section of the movable block 7s is trapezoidal, so that when the protective member 7 is in the second state (such as Figure 3 When the protective element 7 is in the second state, it can not only change the flow field of the flight power system 53 and protect the air around the first greenhouse gas flux detector 6 to make it close to the original air state, but also when the protective element 7 is in the second state, it is in an arc shape. Compared with the straight state, it can improve the distribution uniformity of the flow field of the flight power system 53 and increase the stability of the UAV 5 when the protective element 7 is in the second state.

[0055] It is worth noting that, in some embodiments, the tail of the first end 72 and the tail of the second end 73 are both provided with a first magnetic member (not shown in the figure), and the second fixed block 2 and the fourth fixed block 4 are both provided with a second magnetic member (not shown in the figure), so that when the protective member 7 is in the first state, the first magnetic member is magnetically connected to the second magnetic member, thereby improving the stability of the protective member 7 in the first state.

[0056] It can be understood that the multiple movable blocks 7s can be connected by magnetic attraction or by hooks and slots. The embodiment of the present application does not specifically limit the specific connection method between the multiple movable blocks 7s.

[0057] It is understood that, whether in the first state or the second state, the protective member 7 can serve as a support for the drone 5, supporting the drone 5 when it lands. That is, due to the provision of the protective member 7, there is no need to configure a separate support for the drone 5.

[0058] In the embodiment of the present application, the UAV greenhouse gas flux measurement device 100 includes: a UAV 5, the UAV 5 includes a central frame 51, four arms 52, four flight power systems 53 and a control system 54, the four arms 52 are radially connected to the central frame 51 with the central frame 51 as the center, the arms 52 are provided with through holes 521, the flight power systems 53 correspond to the through holes 521, the control system 54 is connected to the central frame 51 along a first direction L1, the first direction L1 is parallel to the central axis of the central frame 51, and the flight power system 53 is connected to the control system 54; wherein the outer side of the arm 52 is arc-shaped; the first fixing block 1, the second fixing block 2, the third fixing block 3, and the fourth fixing block 4 are sequentially arranged between two adjacent arms 52 along the circumferential direction C1 of the central frame 51; the first greenhouse gas flux detection Detector 6, arranged on the first fixed block 1, for detecting greenhouse gas flux; two protective members 7, the protective member 7 includes a central portion 71 and a first end 72 and a second end 73 respectively arranged on both sides of the central portion 71, the central portion 71 of one protective member 7 is connected to the first fixed block 1, and the central portion 71 of the other protective member 7 is connected to the third fixed block 3, the first end 72 includes a plurality of movable blocks 7s connected in sequence, and the second end 73 includes a plurality of movable blocks 7s connected in sequence; wherein, along the first direction L1, the protective member 7 is protruding from the side of the central frame 51 facing the control system 54, and along the first direction L1, the protective member 7 is protruding from the side of the central frame 51 away from the control system 54; the control system 54 is used to control the two protective members 7 to switch between the first state and the second state; in the first state (such as Figure 1 As shown), the multiple movable blocks 7s of the first ends 72 of the two protective members 7 are arranged along the outer sides of the two adjacent arms 52, and the multiple movable blocks 7s of the second ends 73 of the two protective members 7 are arranged along the outer sides of the other two adjacent arms 52; in the second state (as shown), Figure 3As shown), the first end 72 and the second end 73 of one of the protective members 7 extend symmetrically to both sides of the first fixed block 1 to protect the first greenhouse gas flux detector 6, and the first end 72 and the second end 73 of the other protective member 7 extend symmetrically to both sides of the third fixed block 3. Through the above-mentioned UAV greenhouse gas flux measurement device 100, when the protective member 7 is in the first state, the protective member 7 is retracted to the outside of the arm 52, reducing the flight resistance of the UAV 5. When the protective member 7 is in the second state, the protective member 7 protects the first greenhouse gas flux detector 6, reducing the interference of the flow field of the flight power system 53 on the first greenhouse gas flux detector 6, and improving the accuracy of the greenhouse gas flux detection. That is, by changing the state of the protective member 7, the UAV greenhouse gas flux measurement device 100 can take into account both the flight resistance and the detection accuracy of the first greenhouse gas flux detector 6.

[0059] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of this application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to be additional limitations on the content of this application. The purpose of providing these embodiments is to make the understanding of the disclosure of this application more thorough and comprehensive. In addition, the above-mentioned technical features can be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of this application; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A UAV greenhouse gas flux measurement device, characterized in that: include: A drone comprising a center frame and a control system, a first greenhouse gas flux detector, configured to detect greenhouse gas flux; Two protective members, each comprising a central portion and a first end and a second end respectively provided on either side of the central portion, the first end comprising a plurality of movable blocks connected in sequence, and the second end comprising a plurality of movable blocks connected in sequence; The two protective members are symmetrically arranged on both sides of the center frame of the drone, and each protective member protrudes along the central axis of the drone to form a protective area on both sides of the drone; The UAV includes four arms and four flight power systems, wherein the flight power systems are connected to the control system, and the control system is used to control the two protective elements to switch between the first state and the second state; In the first state, the multiple movable blocks at the first ends of the two protective members are respectively arranged along the outer sides of two adjacent arms, and the multiple movable blocks at the second ends of the two protective members are respectively arranged along the outer sides of the other two adjacent arms; In the second state, the first end and the second end of one of the protective members are symmetrically extended to protect the first greenhouse gas flux detector, and the first end and the second end of the other protective member are symmetrically extended; Wherein, the outer side of the arm is arc-shaped; A first fixing block, a second fixing block, a third fixing block, and a fourth fixing block are sequentially arranged between two adjacent arms along the circumference of the center frame; A first greenhouse gas flux detector is disposed on the first fixing block; The central portion of one of the protective members is connected to the first fixing block, and the central portion of the other protective member is connected to the third fixing block; In the second state, the first end and the second end of one of the protective members extend symmetrically to both sides of the first fixing block, and the first end and the second end of the other protective member extend symmetrically to both sides of the third fixing block; Also included are four sets of leash ropes; One end of one set of traction ropes is connected to the first fixed block and can be retracted and released by the first fixed block, and the other end of the traction ropes passes through the plurality of movable blocks at the first end of the protective element in sequence and is then connected to the second fixed block and can be retracted and released by the second fixed block, so that the first end of the protective element can be switched between the first state and the second state; One end of one set of traction ropes is connected to the first fixed block and can be retracted and released by the first fixed block, and the other end of the traction ropes passes through the plurality of movable blocks at the second end of one of the protective elements in sequence and is then connected to the fourth fixed block and can be retracted and released by the fourth fixed block, so that the second end of one of the protective elements can be switched between the first state and the second state; One end of one set of traction ropes is connected to the third fixed block and can be retracted and released by the third fixed block, and the other end of the traction ropes passes through the plurality of movable blocks of the first end of the other protective element in sequence and is then connected to the second fixed block and can be retracted and released by the second fixed block, so that the first end of the other protective element switches between the first state and the second state; One end of one set of traction ropes is connected to the third fixed block and can be retracted and released by the third fixed block, and the other end thereof passes through multiple movable blocks at the second end of the other protective element in sequence and is connected to the fourth fixed block, and can be retracted and released by the fourth fixed block, so that the second end of the other protective element can be switched between the first state and the second state.

2. The greenhouse gas flux measurement device for drones according to claim 1, characterized in that: The four arms are connected to the center frame in a radially spaced pattern with the center frame as the center. The arms are provided with through holes, and the flight power system corresponds to the through holes. The control system is connected to the center frame along a first direction, and the first direction is parallel to the central axis of the center frame.

3. The greenhouse gas flux measurement device for drones according to claim 2, characterized in that: Two adjacent arms are connected along the circumference of the center frame.

4. The greenhouse gas flux measurement device for drones according to claim 2, characterized in that: The flight power system includes a first motor and a rotor. The first motor is arranged on the aircraft arm. The rotor is connected to the output shaft of the first motor. The rotor is located in the through hole.

5. The greenhouse gas flux measurement device for drones according to claim 2, characterized in that: It also includes a wireless communication module, which is connected to the control system. The first greenhouse gas flux detector is connected to the control system. The wireless communication module is used to send data detected by the first greenhouse gas flux detector to a ground station.

6. The greenhouse gas flux measurement device for drones according to claim 2, characterized in that: It also includes a second greenhouse gas flux detector, which is arranged on the third fixing block and is used to detect the greenhouse gas flux.

7. The greenhouse gas flux measurement device for drones according to claim 1, characterized in that: A second motor is respectively provided in the first fixed block, the second fixed block, the third fixed block and the fourth fixed block, and the second motor is used to control the retraction and release of the traction rope.

8. The greenhouse gas flux measurement device for drones according to claim 1, characterized in that: The number of the traction ropes in a group is two.

9. The UAV greenhouse gas flux measurement device according to any one of claims 2 to 6, characterized in that: Along the circumference of the center frame, the cross section of the movable block is trapezoidal, so that the protective element is arc-shaped when in the second state.

10. The UAV greenhouse gas flux measurement device according to any one of claims 2 to 6, characterized in that: The tail of the first end and the tail of the second end are both provided with a first magnetic member, and the second fixed block and the fourth fixed block are both provided with a second magnetic member, so that when the protective member is in the first state, the first magnetic member is magnetically connected to the second magnetic member.

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