IMU damping structure for flight control of multi-rotor unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicles, and discloses a multi-rotor unmanned aerial vehicle flight control IMU damping structure which comprises an IMU module shell and an IMU body. The IMU module shell is internally provided with an IMU main body, the upper surface of the balancing weight and the lower surface of the IMU main body are each provided with a first PVC sheet, the face, away from the IMU main body, of each first PVC sheet is provided with damping foam, and the upper surface, close to the inner top of the IMU module shell, of each damping foam is provided with a second PVC sheet. The damping effect on the IMU main body can be improved through the damping foams, the first PVC sheet and the second PVC sheet, the IMU main body, the balancing weight, the upper damping foam and the lower damping foam are assembled into an integrated structure through an isolation type structure, the integrated structure is isolated from an unmanned aerial vehicle body to form a certain isolation space, vibration transmission can be effectively reduced, and the damping effect of the IMU main body can be effectively improved through the damping foams. The weight is light, the cost is lower, and the weather resistance and the temperature resistance are better.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to an IMU shock absorbing structure of a multi-rotor unmanned aerial vehicle flight control. Background Art

[0002] IMU is an important component of the flight control system of multi-rotor UAVs. It integrates high-precision sensor components and can accurately sense and calculate the flight attitude of the UAV and other data. These data are crucial for the precise positioning, hovering and autonomous and stable flight of the UAV. In order to reduce the interference of vibration on the IMU and improve the flight stability and control accuracy of the UAV, a shock-absorbing structure is needed to absorb and disperse the vibration energy and reduce the impact of vibration on the IMU, thereby ensuring that the IMU can accurately measure the flight attitude of the UAV.

[0003] Existing shock-absorbing structures generally use rubber pads to absorb shock to the IMU, but the performance of rubber pads is unstable in high or low temperature environments. Rubber materials are easily affected by temperature, oil, ozone, exposure and chemical solvent erosion. Especially in high or low temperature environments, the shock-absorbing performance of rubber pads may be significantly reduced, resulting in changes in their performance, such as aging, hardening or softening, which will affect their shock-absorbing effect on the IMU.

[0004] To this end, the present invention provides an IMU shock absorption structure for a multi-rotor UAV flight control. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The present invention provides an IMU shock-absorbing structure for a multi-rotor unmanned aerial vehicle flight control, comprising an IMU module shell and an IMU body; the IMU body is installed inside the IMU module shell, a counterweight is installed on the upper surface of the IMU body, a PVC sheet 1 is installed on the upper surface of the counterweight and the lower surface of the IMU body, shock-absorbing foam is installed on the side of the PVC sheet 1 away from the IMU body, a dehumidification module is fixedly installed inside the shock-absorbing foam, a PVC sheet 2 is installed on the upper surface of the shock-absorbing foam close to the top of the inner shell of the IMU module, and the upper surface of the PVC sheet 2 is connected to the top of the inner shell of the IMU module; by assembling the IMU body, the counterweight and upper and lower groups of shock-absorbing foam into an integrated structure, and then connecting the IMU body into a shock-absorbing whole through the PVC sheet 1 and the PVC sheet 2, the influence of external vibration on it can be reduced, and the transmission of vibration can be effectively reduced through the shock-absorbing foam.

[0007] Preferably, in order to improve the high temperature resistance of the shock-absorbing foam, the outer surface of the shock-absorbing foam is provided with a high temperature resistant layer, the high temperature resistant layer is ceramic fiber, and the upper and lower surfaces of the shock-absorbing foam and the high temperature resistant layer are provided with heat dissipation channels. The high temperature resistant layer can improve the thermal stability and reduce the weight of the shock-absorbing foam to a certain extent, so as to reduce the direct impact of high temperature on the shock-absorbing foam, and the heat dissipation area of ​​the shock-absorbing structure can be increased through the heat dissipation channel.

[0008] Preferably, in order to improve the low-temperature resistance of the shock-absorbing foam, a low-temperature resistant layer is provided on the outer surface of the high-temperature resistant layer, and the low-temperature resistant layer is polyimide foam. In order to prevent the use of the shock-absorbing foam from being affected by humidity in the external environment, a moisture-proof layer is provided on the outer surface of the low-temperature resistant layer, and the moisture-proof layer is a moisture-proof coating. The low-temperature resistant layer can avoid heat loss from the shock-absorbing foam in the external low-temperature environment, maintain the internal temperature of the shock-absorbing structure, and prevent the shock-absorbing foam from becoming brittle and cracking and breaking in the low-temperature environment.

[0009] Preferably, the dehumidification module includes a drying sheet, a micro fan and a humidity sensor. The drying sheet is installed inside the shock-absorbing foam, the micro fan is installed at the bottom of the drying sheet, and the humidity sensor is installed on one side of the micro fan. The rotation of the micro fan can be controlled to promote heat dissipation inside the device, and the wind flow can promote the drying of the drying sheet.

[0010] Preferably, a filter is installed under the micro fan, and a plurality of mesh holes are provided inside the filter, so that the wind delivered by the micro fan can be filtered to prevent a large amount of dust from adhering to the outer surface of the IMU body and affecting the working detection of the IMU body.

[0011] Preferably, a coil spring shaft structure is installed on one side of the shock-absorbing foam close to the bottom of the micro-fan, one end of the filter is wound inside the coil spring shaft structure and connected, a motor assembly is installed on the side of the shock-absorbing foam away from the filter, and the output end of the motor assembly is connected to the other end of the filter, so that the position of the filter can be adjusted. As the filter gradually shifts, the used area originally located directly below the micro-fan is replaced by a new, unused filter area.

[0012] Preferably, in order to ensure the continuous and efficient operation of the filter and avoid increased wind resistance and decreased heat dissipation efficiency caused by dust accumulation, connecting rods are installed on both sides of the micro-fan housing close to the filter, and a scraping brush is installed on one end of the connecting rod close to the filter. The scraping surface of the scraping brush fits the outer surface of the filter. When the filter moves, the dust accumulated on the outer surface of the filter can be scraped off by the scraping surface of the scraping brush, thereby reducing the air circulation resistance caused by dust accumulation.

[0013] Preferably, in order to improve the heat dissipation effect inside the device, heat dissipation grooves are equidistantly arranged inside the PVC sheet 1, and flow grooves are arranged on both sides of the surface of the PVC sheet 1, so that heat can be better discharged through the flow grooves and the heat dissipation grooves.

[0014] Preferably, in order to improve the strength of the shock-absorbing foam, reinforcing ribs are provided inside the shock-absorbing foam, and the reinforcing ribs can enhance the bearing capacity of the shock-absorbing foam and prevent the shock-absorbing foam from being deformed.

[0015] Preferably, in order to improve the load-bearing capacity of the IMU module housing, reinforcing rods are installed on the inner wall of the IMU module housing, and the reinforcing rods are distributed at the four corners of the inner wall of the IMU module housing. The four corners of the IMU module housing can be fixed by four groups of reinforcing rods, thereby improving the load-bearing capacity of the IMU module housing.

[0016] Preferably, in order to achieve the installation of the IMU module housing, positioning blocks are installed on both sides of the top of the IMU module housing, and fixing screws are installed inside the four corners of the IMU module housing.

[0017] 1. The beneficial effects of the present invention are as follows: the IMU shock-absorbing structure of the flight control of a multi-rotor UAV described in the present invention is used in combination with shock-absorbing foam, PVC sheet one and PVC sheet two. The shock-absorbing foam, PVC sheet one and PVC sheet two can improve the shock-absorbing effect of the IMU main body. The IMU and the counterweight block and the upper and lower groups of shock-absorbing foam are assembled into an integrated structure by adopting an isolation structure, which is isolated from the UAV fuselage to form a certain isolation space, which can effectively reduce the transmission of vibration. By adopting shock-absorbing foam, it is light in weight, lower in cost, and better in weather resistance and temperature resistance.

[0018] 2. The IMU shock-absorbing structure of a multi-rotor UAV flight control system described in the present invention is used in combination with a high-temperature resistant layer and a low-temperature resistant layer. The high-temperature resistant layer can improve the thermal stability of the shock-absorbing foam and reduce the weight, thereby reducing the direct impact of high temperature on the shock-absorbing foam. The low-temperature resistant layer can enhance the low-temperature resistance of the shock-absorbing foam, reduce the heat loss of the shock-absorbing foam, and maintain the internal temperature of the shock-absorbing structure, thereby improving the weather resistance and temperature resistance of the shock-absorbing foam.

[0019] 3. The IMU shock-absorbing structure of the flight control of a multi-rotor UAV described in the present invention is used in combination with a moisture-proof layer, a drying sheet, a micro fan and a humidity sensor. The moisture-proof layer can prevent moisture from penetrating into the interior of the shock-absorbing foam, thereby preventing moisture from entering the interior of the shock-absorbing foam and affecting the use of the shock-absorbing foam. The humidity inside the device can be detected by the humidity sensor, and the heat dissipation inside the device can be promoted by controlling the rotation of the micro fan. At the same time, the wind flow can promote the drying of the drying sheet, thereby preventing the humidity of the gas from affecting the operation of the IMU body.

[0020] 4. The IMU shock-absorbing structure of the flight control of a multi-rotor UAV described in the present invention is used in combination with a heat dissipation groove and a flow groove. A plurality of heat dissipation grooves can improve the heat dissipation effect inside the device. When dehumidification is performed inside the device, the flow groove and the heat dissipation groove can better discharge the heat and promote the discharge of moisture, thereby improving the heat dissipation and dehumidification effect of the device.

[0021] 5. The IMU shock absorption structure of a multi-rotor UAV flight control described in the present invention is used in conjunction with a coil spring shaft structure, a filter, a motor assembly, a connecting rod and a scraper brush. The filter can greatly reduce the amount of dust entering the IMU main body area, which helps to maintain the cleanliness of the surface of the IMU main body and reduce problems such as poor heat dissipation or false triggering caused by dust accumulation. The motor assembly drives one end of the filter to shift, and then the coil spring on the coil spring shaft structure is deformed, and the filter moves. As the filter gradually shifts, the used area originally located directly below the micro fan is replaced by a new, unused filter area, and when the filter moves, the scraping surface of the scraper brush can scrape off the dust accumulated on the outer surface of the filter, reducing the air circulation resistance caused by dust accumulation, thereby ensuring the unobstructed flow of the wind conveying system and avoiding dust accumulation, which affects the heat dissipation of the IMU main body by wind conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a stereogram of an embodiment of the present invention; Figure 2 is a schematic diagram of a partially expanded structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the IMU module housing; Figure 4 It is a schematic diagram of a part of the internal structure of the shock-absorbing foam of the present invention; Figure 5 It is a schematic diagram of the structure of the dehumidification module in the present invention; Figure 6 It is a schematic diagram of the structure of a PVC sheet 1 in the present invention.

[0023] Description of reference numerals: 1. IMU module housing; 101. Positioning block; 102. Fixing screw; 103. Reinforcement rod; 2. IMU body; 3. Counterweight; 4. PVC sheet one; 5. Shock-absorbing foam; 501. High temperature resistant layer; 502. Heat dissipation channel; 503. Low temperature resistant layer; 504. Moisture-proof layer; 505. Dehumidification module; 5051. Drying sheet; 5052. Micro fan; 5053. Humidity sensor; 506. Reinforcement rib; 6. PVC sheet two; 7. Flow groove; 701. Heat dissipation groove; 8. Coil spring shaft structure; 801. Filter; 802. Motor assembly; 803. Connecting rod; 804. Scraper brush. DETAILED DESCRIPTION

[0024] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0025] The following is a further detailed description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. Figures 1 to 6 , this application provides an IMU shock absorption structure for multi-rotor UAV flight control, please refer to Figure 1 and Figure 2 , including an IMU module housing 1 and an IMU body 2; the IMU body 2 is installed inside the IMU module housing 1, a counterweight 3 is installed on the upper surface of the IMU body 2, a PVC sheet 4 is installed on the upper surface of the counterweight 3 and the lower surface of the IMU body 2, a shock-absorbing foam 5 is installed on the side of the PVC sheet 4 away from the IMU body 2, a dehumidification module 505 is fixedly installed inside the shock-absorbing foam 5, a PVC sheet 6 is installed on the upper surface of the shock-absorbing foam 5 close to the top of the inner part of the IMU module housing 1, and the upper surface of the PVC sheet 6 is connected to the inner top of the IMU module housing 1.

[0026] Specifically, the IMU module housing 1 can protect the internal IMU main body 2, and the shock-absorbing foam 5 has the advantages of light weight and low cost. The IMU main body 2 and the counterweight block 3 and the upper and lower groups of shock-absorbing foams 5 are assembled into an integrated structure, and then the IMU main body 2 is connected into a shock-absorbing whole through PVC sheet 1 4 and PVC sheet 2 6, and is pasted and fixed in the IMU module housing 1. A position with less vibration is selected inside the drone body to install the IMU main body 2, that is, a position close to the center of gravity of the drone where the vibration is relatively small, and it is fixedly installed as a whole on the center of gravity of the drone to form an independent shock-absorbing chamber, which can reduce the impact of external vibration on it, and the shock-absorbing foam 5 can effectively reduce the transmission of vibration.

[0027] Please refer to Figure 4 The outer surface of the shock-absorbing foam 5 is provided with a high temperature resistant layer 501, and the high temperature resistant layer 501 is ceramic fiber. The upper and lower surfaces of the shock-absorbing foam 5 and the high temperature resistant layer 501 are provided with heat dissipation channels 502. The heat dissipation channels 502 are in the form of multiple groups of through grooves and are equidistantly distributed on the upper and lower surfaces of the high temperature resistant layer 501.

[0028] Specifically, in order to improve the high temperature resistance of the shock-absorbing foam 5, the ceramic fiber used in the high temperature resistant layer 501 has excellent properties such as high strength, light weight, high modulus, good thermal stability, low thermal conductivity, and high temperature resistance. Due to the good thermal stability and lightweight characteristics of the ceramic fiber, the thermal stability of the shock-absorbing foam 5 can be improved and the weight can be reduced to a certain extent, so as to reduce the direct impact of high temperature on the shock-absorbing foam 5. The heat dissipation area of ​​the shock-absorbing structure can be increased through the heat dissipation channel 502, which helps to dissipate heat and reduce the internal temperature, so as to avoid thermal expansion of the shock-absorbing foam 5 in a high temperature environment, resulting in changes in material size and shape, which destroy the original design of the shock-absorbing structure and make it unable to effectively absorb and disperse vibration energy.

[0029] Please refer to Figure 4 The outer surface of the high temperature resistant layer 501 is provided with a low temperature resistant layer 503, and the low temperature resistant layer 503 is polyimide foam.

[0030] Specifically, in order to improve the low-temperature resistance of the shock-absorbing foam 5, the polyimide used in the low-temperature resistant layer 503 has its own molecular chain structure that is compact and ordered, which increases the intermolecular electrostatic interaction force in a low-temperature environment, thereby further enhancing the low-temperature resistance of the shock-absorbing foam 5. The low-temperature resistant layer 503 can avoid the external low-temperature environment, reduce the heat loss of the shock-absorbing foam 5, maintain the internal temperature of the shock-absorbing structure, and avoid the shock-absorbing foam 5 from becoming brittle, cracking and breaking in a low-temperature environment. The low-temperature resistant layer 503 can significantly improve the overall performance of the shock-absorbing foam 5, thereby ensuring the shock-absorbing effect of the shock-absorbing foam 5 at low temperatures.

[0031] Please refer to Figure 4 The outer surface of the low temperature resistant layer 503 is provided with a moisture-proof layer 504, and the moisture-proof layer 504 is a moisture-proof coating.

[0032] Please refer to Figure 5 The dehumidification module 505 includes a drying sheet 5051, a micro fan 5052 and a humidity sensor 5053. The drying sheet 5051 is installed inside the shock-absorbing foam 5. The micro fan 5052 is installed at the bottom of the drying sheet 5051. The micro fan 5052 is a DC6010 micro ultra-thin cooling fan. A humidity sensor 5053 is installed on one side of the micro fan 5052. The model of the humidity sensor 5053 is a SHT21 humidity sensor.

[0033] Specifically, in order to prevent the use of the shock-absorbing foam 5 from being affected by the humidity of the external environment, the moisture-proof layer 504 can prevent moisture from penetrating into the interior of the shock-absorbing foam 5. The drying sheet 5051 is composed of a drying material. The moisture entering the structure can be absorbed by the drying sheet 5051 to prevent moisture from entering the interior of the shock-absorbing foam 5 and affecting the use of the shock-absorbing foam 5. The humidity inside the device can be detected by the humidity sensor 5053. When the detected humidity value is large, the moisture inside the device can be discharged by controlling the rotation of the micro fan 5052, and the heat dissipation inside the device can be promoted. At the same time, the wind flow can promote the drying of the drying sheet 5051.

[0034] Please refer to Figure 5 A filter 801 is installed below the micro fan 5052. The filter 801 has multiple mesh holes inside. The filter 801 is made of flexible metal. The filter 801 can effectively intercept and capture tiny particles in the air.

[0035] Specifically, in order to filter the wind delivered by the micro fan 5052 and prevent a large amount of dust from adhering to the outer surface of the IMU main body 2 and affecting the working detection of the IMU main body 2, when the micro fan 5052 is working, the inhaled air is first pre-treated through the filter 801. The filter 801 can greatly reduce the amount of dust entering the IMU main body 2 area, and also ensure the quality of the air delivered to the surrounding of the IMU, which helps to maintain the cleanliness of the surface of the IMU main body 2 and reduce problems such as poor heat dissipation or false triggering caused by dust accumulation, thereby avoiding a large amount of dust accumulation and adhering to the outer surface of the IMU main body 2, which will not affect the working detection of the IMU main body 2.

[0036] Please refer to Figure 5 A coil spring shaft structure 8 is installed on one side of the shock-absorbing foam 5 close to the bottom of the micro fan 5052. The inside of the coil spring shaft structure 8 is wound and connected to one end of the filter 801. The coil spring shaft structure 8 consists of a shell, a shaft body and a coil spring. The shaft body is rotatably installed inside the shell, and the outside of the shaft body is wound and connected to the filter 801. One end of the coil spring is connected to the shaft body, and the other end is connected to the shell. A motor assembly 802 is installed on the side of the shock-absorbing foam 5 away from the filter 801, and the output end of the motor assembly 802 is connected to the other end of the filter 801.

[0037] Specifically, in order to adjust the position of the filter 801, the motor assembly 802 works, the power end of the motor assembly 802 will drive one end of the filter 801 to shift, and then the coil spring on the coil spring shaft structure 8 will be deformed, and the filter 801 will move. As the filter 801 gradually shifts, the used area originally located directly below the micro fan 5052 is replaced by a new, unused filter 801 area. This automatic switching process does not require human intervention, greatly reducing maintenance costs and time.

[0038] Please refer to Figure 5 Connecting rods 803 are installed on both sides of the micro fan 5052 shell near the filter 801, and a scraping brush 804 is installed on one end of the connecting rod 803 near the side of the filter 801. The scraping surface of the scraping brush 804 fits the outer surface of the filter 801. The connecting rod 803 can support the scraping brush 804 on one side. The scraping brush 804 is made of highly wear-resistant and moderately soft fiber material. This material can effectively scrape off dust particles attached to the surface of the filter 801 without causing damage to the filter 801 itself.

[0039] Specifically, in order to ensure the continuous and efficient operation of the filter 801 and avoid the increase in wind resistance and the decrease in heat dissipation efficiency caused by dust accumulation, when the filter 801 moves, the scraping surface of the scraping brush 804 can scrape off the dust accumulated on the outer surface of the filter 801, thereby reducing the air circulation resistance caused by dust accumulation, thereby ensuring the unobstructed operation of the wind conveying system, avoiding dust accumulation and affecting the heat dissipation of the IMU body 2 by wind conveying. The automatic scraping function of the scraping brush 804 greatly reduces the frequency and difficulty of manual cleaning of the filter 801, and improves the maintenance efficiency and reliability of the entire system. As the filter 801 continues to move, the scraping brush 804 continuously performs the cleaning task, ensuring that the air around the IMU body 2 always remains fresh, effectively supporting the heat dissipation requirements of the IMU body 2.

[0040] Please refer to Figure 6 The interior of the PVC sheet 4 is provided with heat dissipation grooves 701 at equal intervals, and flow grooves 7 are provided on both sides of the surface of the PVC sheet 4.

[0041] Specifically, in order to improve the heat dissipation effect inside the device, a plurality of heat dissipation grooves 701 can be used to improve the heat dissipation effect inside the device, and when dehumidification is performed inside the device, the heat can be better discharged through the flow groove 7 and the heat dissipation groove 701, and the gas discharge can be promoted at the same time.

[0042] Please refer to Figure 4 The interior of the shock-absorbing foam 5 is provided with reinforcing ribs 506, which are made of glass fiber composite materials and have the characteristics of light weight, high strength, corrosion resistance, chemical resistance, easy processing and molding, etc.

[0043] Specifically, in order to improve the strength of the shock-absorbing foam 5 , the reinforcing ribs 506 are arranged inside the shock-absorbing foam 5 . The reinforcing ribs 506 can enhance the bearing capacity of the shock-absorbing foam 5 and prevent the shock-absorbing foam 5 from deforming and affecting the shock absorption of the IMU body 2 .

[0044] Please refer to Figure 3The inner wall of the IMU module housing 1 is installed with reinforcing rods 103, and the reinforcing rods 103 are distributed at the four corners of the inner wall of the IMU module housing 1.

[0045] Specifically, in order to improve the load-bearing capacity of the IMU module housing 1 and prevent the IMU module housing 1 from being deformed by external force and causing damage to the IMU main body 2, the shape of the top end of the reinforcing rod 103 fits the inner wall of the IMU module housing 1, and the four corners of the IMU module housing 1 can be fixed through four groups of reinforcing rods 103, thereby improving the load-bearing capacity of the IMU module housing 1.

[0046] Please refer to Figure 3 Positioning blocks 101 are installed on both sides of the top of the IMU module housing 1, and fixing screws 102 are installed inside the four corners of the IMU module housing 1.

[0047] Specifically, in order to position and install the IMU module housing 1 on the drone, the corresponding positioning block 101 at the bottom of the IMU module housing 1 is clamped at the installation position on the drone, and then the fixing screws 102 are passed through the IMU module housing 1. The IMU module housing 1 can be fixedly installed on the drone for use through the fixing screws 102.

[0048] Working principle: The IMU body 2 and the counterweight 3 and the upper and lower groups of shock-absorbing foams 5 are assembled into an integrated structure, and then the IMU body 2 is connected into a shock-absorbing whole through PVC sheet 1 4 and PVC sheet 2 6, and is pasted and fixed in the IMU module housing 1, and finally fixed to the center of gravity of the drone using fixing screws 102 to form an independent shock-absorbing chamber. By wrapping the IMU module with shock-absorbing foam 5, a certain isolation space can be formed between it and the fuselage, and it is isolated from the drone fuselage, thereby effectively reducing the transmission of vibration and playing a shock-absorbing role for the IMU body 2. The rotation of the micro fan 5052 inside the shock-absorbing foam 5 at the bottom of the IMU body 2 can promote air flow, and then the gas dried by the drying sheet 5051 will be blown to the IMU body 2, which will absorb the vibration of the drone body. The IMU body 2 dissipates heat, and then the gas is discharged through the heat dissipation groove 701 and the flow groove 7. The filter 801 can greatly reduce the amount of dust entering the IMU body 2 area, which helps to maintain the cleanliness of the surface of the IMU body 2 and reduce problems such as poor heat dissipation or false triggering caused by dust accumulation. Then, the motor assembly 802 works, and the power end of the motor assembly 802 drives one end of the filter 801 to shift, and then the coil spring on the coil spring shaft structure 8 is deformed, and the filter 801 moves. As the filter 801 gradually shifts, the used area originally located directly below the micro fan 5052 is replaced by a new, unused filter 801 area. At the same time, when the filter 801 moves, the scraping surface of the scraper 804 can scrape off the dust accumulated on the outer surface of the filter 801.

[0049] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. An IMU shock absorption structure for a multi-rotor UAV flight control system, comprising an IMU module housing (1) and an IMU body (2); characterized in that: An IMU body (2) is installed inside the IMU module housing (1), a counterweight (3) is installed on the upper surface of the IMU body (2), a PVC sheet (4) is installed on the upper surface of the counterweight (3) and the lower surface of the IMU body (2), a shock-absorbing foam (5) is installed on the side of the PVC sheet (4) away from the IMU body (2), a dehumidification module (505) is fixedly installed inside the shock-absorbing foam (5), a PVC sheet (6) is installed on the upper surface of the shock-absorbing foam (5) close to the top of the inside of the IMU module housing (1), and the upper surface of the PVC sheet (6) is connected to the top of the inside of the IMU module housing (1).

2. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 1, characterized in that: The outer surface of the shock-absorbing foam (5) is provided with a high temperature resistant layer (501), the high temperature resistant layer (501) is ceramic fiber, and the upper surface and the lower surface of the shock-absorbing foam (5) and the high temperature resistant layer (501) are both provided with heat dissipation channels (502).

3. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 2, characterized in that: The outer surface of the high temperature resistant layer (501) is provided with a low temperature resistant layer (503), the low temperature resistant layer (503) is polyimide foam, and the outer surface of the low temperature resistant layer (503) is provided with a moisture proof layer (504), the moisture proof layer (504) is a moisture proof coating.

4. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 1, characterized in that: The dehumidification module (505) comprises a drying sheet (5051), a micro fan (5052) and a humidity sensor (5053); the drying sheet (5051) is installed inside the shock-absorbing foam (5); the micro fan (5052) is installed at the bottom of the drying sheet (5051); and the humidity sensor (5053) is installed on one side of the micro fan (5052).

5. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 4, characterized in that: A filter screen (801) is installed below the micro fan (5052), and the filter screen (801) has a plurality of mesh holes inside.

6. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 5, characterized in that: A coil spring shaft structure (8) is installed on one side of the shock absorbing foam (5) close to the bottom of the micro fan (5052); the interior of the coil spring shaft structure (8) is wound and connected to one end of the filter screen (801); a motor assembly (802) is installed on one side of the shock absorbing foam (5) away from the filter screen (801); and the output end of the motor assembly (802) is connected to the other end of the filter screen (801).

7. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 6, characterized in that: Connecting rods (803) are installed on both sides of the housing of the micro fan (5052) close to the filter screen (801), and a scraping brush (804) is installed on one end of the connecting rod (803) close to the filter screen (801), and the scraping surface of the scraping brush (804) is in contact with the outer surface of the filter screen (801).

8. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 1, characterized in that: Heat dissipation grooves (701) are equidistantly arranged inside the first PVC sheet (4), and flow grooves (7) are arranged on both sides of the surface of the first PVC sheet (4).

9. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 1, characterized in that: The interior of the shock-absorbing foam (5) is provided with reinforcing ribs (506), and the inner wall of the IMU module housing (1) is provided with reinforcing rods (103), which are distributed at the four corners of the inner wall of the IMU module housing (1).

10. The IMU shock absorption structure of a multi-rotor UAV flight control system according to claim 1, characterized in that: Positioning blocks (101) are installed on both sides of the top of the IMU module housing (1), and fixing screws (102) are installed inside the four corners of the IMU module housing (1).

Images