Unmanned aerial vehicle surveying and mapping data acquisition system and use method thereof

Abstract

The invention discloses an unmanned aerial vehicle surveying and mapping data acquisition system and a use method thereof, and belongs to the technical field of unmanned aerial vehicle surveying and mapping data acquisition equipment.The unmanned aerial vehicle surveying and mapping data acquisition system comprises an unmanned aerial vehicle body, the bottom of the unmanned aerial vehicle body is connected with a fixing frame, and the interior of the fixing frame is rotationally connected with an acquisition unit through a rotating shaft; the side wall of the fixing frame is connected with a servo gear motor used for driving the collecting unit to turn over up and down, and the interior of the embedded cavity is connected with a fluid conveying piston in a sealed and sliding mode. The unmanned aerial vehicle main body drives the acquisition unit to perform high-altitude flight operation so as to realize acquisition work of surveying and mapping data, and when the acquisition unit encounters the situation that the unmanned aerial vehicle main body is suddenly damaged and falls in the process of acquiring the surveying and mapping data, the unmanned aerial vehicle main body is not damaged; anti-collision protection of a camera lens can be achieved through the folding protector which is arranged in front of the camera, has a folding contraction function and is in an unfolded state, and the situation that the camera lens is damaged due to collision of a hard object in the process that the camera falls along with the unmanned aerial vehicle body is effectively avoided.

Description

Technical Field

[0001] This application relates to the field of UAV mapping data acquisition equipment technology, and more specifically, to a UAV mapping data acquisition system and its usage method. Background Technology

[0002] In terms of modern scientific and technological development, the aerial drones used by some large surveying and mapping companies or surveying bureaus need to have corresponding standard spatial and temporal resolution to ensure the accuracy of surveying the entire survey area. They also need to collect surveying data through surveying data acquisition devices to extract topographic and geomorphological data information.

[0003] The prior art publication CN215794498U provides a UAV mapping data acquisition device. This device starts a reduction motor, which causes the drive gear to rotate. The driven gear meshing with the drive gear also rotates. The driven gear drives the cylinder to rotate, and the cylinder drives the connecting parts and the camera to rotate. Thus, the camera angle can be adjusted during the flight of the UAV mapping data acquisition device, thereby increasing the camera's shooting range.

[0004] Although the existing technical solutions described above can achieve the relevant beneficial effects through the existing technical structure, they still have the following defects: When the existing UAV mapping data acquisition device is in use, the camera used to collect data is directly exposed to the outside and there is no structure around it to protect it. When the UAV is damaged and falls during flight, the camera lens is easily damaged by hitting hard objects.

[0005] Regarding the aforementioned related technologies, the inventors believe that this application enables the acquisition of surveying and mapping data by having the drone body drive the acquisition unit to perform high-altitude flight operations. Furthermore, when the acquisition unit encounters a situation where the drone body is suddenly damaged and falls during the acquisition of surveying and mapping data, a folding protector with a folding and retracting function, which is set in front of the camera and is in the unfolded state, can be used to protect the camera lens from collisions, effectively preventing the camera lens from being damaged by hard objects during the fall of the drone body.

[0006] In view of this, we propose an unmanned aerial vehicle (UAV) mapping data acquisition system and its usage method. Summary of the Invention

[0007] 1. Technical problems to be solved

[0008] The purpose of this application is to provide a method for an unmanned aerial vehicle (UAV) mapping data acquisition system, which solves the technical problems mentioned in the background art above.

[0009] 2. Technical Solution

[0010] This application provides a UAV mapping data acquisition system, including a UAV body, a fixed frame connected to the bottom of the UAV body, an acquisition unit rotatably connected inside the fixed frame via a rotating shaft, a servo reduction motor for driving the acquisition unit to rotate up and down connected to the side wall of the fixed frame, and the output shaft of the servo reduction motor connected to the end of the rotating shaft.

[0011] The acquisition unit includes a protective housing rotatably connected inside the fixed frame. A camera base is attached to the bottom wall of the inner cavity of the protective housing, and a camera is connected to the top of the camera base, with the top surface of the camera attached to the top wall of the inner cavity of the protective housing.

[0012] The protective housing has an embedded chamber inside, and a flow-transmitting piston is slidably connected inside the embedded chamber. A stop bar is connected to the flow-transmitting piston, and the end of the stop bar away from the flow-transmitting piston passes through the side wall of the inner cavity of the protective housing.

[0013] A first tension spring is connected to one end of the flow piston near the abutment rod, and the other end of the first tension spring is connected to the inner wall of the embedded cavity.

[0014] The protective housing also has a secondary cavity, in which a positioning piston is slidably connected. The top of the positioning piston is connected to a pin end, and the top of the pin end passes through the bottom wall of the protective housing. The bottom of the positioning piston is connected to a second tension spring, and the bottom end of the second tension spring is fixedly connected to the bottom wall of the secondary cavity.

[0015] The bottom of the camera base has a vertical slot for the locking end to be snapped into.

[0016] An airflow hose is connected inside the protective housing, and a side branch conduit is fixedly connected to the side wall of the airflow hose.

[0017] The bottom wall of the inner cavity of the protective shell is provided with a propulsion groove, and a folding protector is provided inside the propulsion groove.

[0018] As an optional solution to the technical solution in this application, the end of the side branch catheter away from the airflow hose is connected to the bottom end of the cavity.

[0019] By adopting the above technical solution, this application enables the acquisition of surveying and mapping data by having the drone body drive the acquisition unit to perform high-altitude flight operations. Furthermore, when the acquisition unit encounters a sudden damage and fall of the drone body during the acquisition of surveying and mapping data, the camera lens can be protected against collisions by a folding protector that is set in front of the camera and has a folding and retracting function and is in the unfolded state. This effectively prevents the camera lens from being damaged by hard objects during the fall of the drone body.

[0020] As an optional solution to the technical solution in this application, the folding protector includes a sliding base that is slidably connected to the propulsion groove, and a transparent protective plate that can be flipped up and down is rotatably connected to the sliding base.

[0021] An air cylinder is rotatably connected to the top of the sliding base on the side away from the transparent protective plate. A traction piston is slidably connected to the inner cavity of the air cylinder. A third tension spring is connected to the bottom of the traction piston, and the bottom end of the third tension spring is connected to the bottom wall of the inner cavity of the air cylinder.

[0022] The top of the traction piston is connected to a traction rod, the top of which passes through the top of the air cylinder and is rotatably connected to the side wall of the transparent protective plate.

[0023] A pressure relief pipe is fixedly connected to the lower part of the side wall of the air cylinder, and a switch valve is installed on the pressure relief pipe.

[0024] The sliding base is also equipped with a propulsion pneumatic component that can drive the sliding base to reciprocate within the propulsion chute.

[0025] As an optional solution to the technical solution in this application, one end of the airflow hose is connected to the end of the embedded chamber away from the first tension spring, and the other end passes through the side wall of the protective housing and is fixedly connected to the bottom end of the air cylinder.

[0026] By adopting the above technical solution, the abutment rod pushed by the camera base drives the flow piston to continuously introduce the gas in the inner cavity into the inner cavity of the air cylinder through the air flow hose. The increased air pressure in the inner cavity of the air cylinder drives the transparent protective plate, which was originally in a folded state, to gradually flip up to an upright state through the traction piston.

[0027] As an optional solution to the technical solution in this application, the propulsion pneumatic component includes an embedded cylinder fixedly connected inside the protective shell, a drive piston is slidably connected inside the embedded cylinder, an extension rod is connected to the drive piston, and a pressure regulating air passage is provided inside the extension rod.

[0028] The end of the extension rod away from the drive piston passes through the propulsion groove and connects to the end of the sliding base.

[0029] An air supply pipe is fixedly connected to the end of the embedded cylinder away from the sliding base, and the end of the air supply pipe away from the embedded cylinder extends into the interior of the embedded cavity.

[0030] The propulsion pneumatic components also include a connecting cavity and a mating cavity disposed inside the sliding base, as well as two bladder grooves disposed vertically on the sliding base near the end of the extension rod.

[0031] An elastic membrane is connected inside the cyst groove, and a front piston is connected in a sealed sliding connection inside the connecting cavity, while a rear piston is connected in a sealed sliding connection inside the mating cavity.

[0032] A central connecting rod is connected to the front piston.

[0033] Straight channels are provided inside the sliding base at the positions corresponding to the two bladder slots.

[0034] The sliding base is equipped with exhaust channels at the corresponding positions of the connecting cavity and the mating cavity. One end of one exhaust channel is connected to the end of the connecting cavity away from the extension rod, and the other end passes through the side wall of the sliding base. One end of the other exhaust channel is connected to the end of the mating cavity away from the extension rod, and the other end also passes through the side wall of the sliding base.

[0035] As an optional solution to the technical solution of this application, one end of the straight channel is connected to the corresponding bladder groove, and the other end is connected to the mating part.

[0036] As an optional solution to the technical solution in this application, the end of the central connecting rod furthest from the front piston passes into the mating cavity and connects with the rear piston.

[0037] As an optional solution to the technical solution in this application, one end of the pressure regulating air passage penetrates through the side wall of the extension rod, and the other end penetrates into the interior of the sliding base and is connected to the end of the connecting cavity near the extension rod.

[0038] By adopting the above technical solution, during the process of pushing the camera into the inner cavity of the protective housing, the flow piston continuously draws the gas from the inner cavity of the embedded cylinder into the inner cavity through the gas source pipe. Then, the piston drives the extension rod to continuously pull the transparent protective plate, which is flipping from a folded state to an upright state, closer to the camera lens, and finally makes the upright transparent protective plate block the front of the camera lens.

[0039] This application provides an unmanned aerial vehicle (UAV) mapping data acquisition system, which includes the following steps.

[0040] S1. Quickly push the camera into the inner cavity of the protective housing. When the end of the camera base abuts against the side wall of the inner cavity of the protective housing, the abutment rod is pushed into the inner cavity by the camera base.

[0041] S2. The abutment rod, pushed by the camera base, then drives the flow piston to continuously introduce the gas in the inner cavity into the inner cavity of the air cylinder through the airflow hose.

[0042] S3. The increased air pressure inside the air cylinder causes the traction piston to gradually flip the transparent protective plate, which was originally in a folded state, up to an upright state.

[0043] S4. The gas entering the airflow hose from the inner cavity is diverted to the sub-cavity through the side branch conduit. After the air pressure inside the sub-cavity increases, it pushes the pin end to latch into the vertical slot at the bottom of the camera base, thus fixing the position of the camera pushed into the inner cavity of the protective housing.

[0044] S5. During the process of pushing the camera into the inner cavity of the protective housing, the flow piston continuously draws the gas from the inner cavity of the embedded cylinder into the inner cavity through the gas source pipe. Then, the driving piston uses the extension rod to continuously pull the transparent protective plate, which is flipping from a folded state to an upright state, closer to the camera lens, and finally makes the upright transparent protective plate block the front of the camera lens.

[0045] S6. When the drive piston continuously pulls the transparent protective plate toward the camera lens, the gas in the connecting cavity is continuously drawn into the inner cavity of the embedded cylinder through the pressure regulating air passage. Then, the front piston continuously pulls the rear piston to move through the central connecting rod.

[0046] S7. Following the transverse movement of the front piston, the rear piston continuously pushes the gas in the mating cavity through the straight channel into the bladder groove. The increased gas pressure inside the bladder groove expands the volume of the elastic bladder membrane. Under the pulling force of the extension rod, the expanded elastic bladder membrane adheres tightly to the side wall of the propulsion chute and absorbs and buffers the impact force acting on the transparent protective plate.

[0047] 3. Beneficial effects

[0048] One or more technical solutions provided in this application have at least the following technical effects or advantages.

[0049] 1. This application enables the acquisition of surveying and mapping data by using a drone body to drive the acquisition unit in high-altitude flight operations. When the acquisition unit encounters a sudden damage and fall of the drone body during the acquisition of surveying and mapping data, the camera lens can be protected against collision by a folding protector that is set in front of the camera and has a folding and retracting function and is in the unfolded state. This effectively avoids the camera lens being damaged by hard objects during the fall of the drone body.

[0050] 2. Quickly push the camera into the inner cavity of the protective housing. When the end of the camera base abuts against the side wall of the inner cavity of the protective housing, the abutment rod is pushed into the inner cavity by the camera base. The abutment rod pushed by the camera base then drives the flow piston to continuously introduce the gas in the inner cavity into the inner cavity of the air cylinder through the air flow hose. The gas entering the air flow hose from the inner cavity is diverted to the inner cavity of the secondary cavity through the side branch pipe. After the air pressure inside the secondary cavity increases, it pushes the pin end to lock into the vertical slot at the bottom of the camera base, thereby fixing the position of the camera pushed into the inner cavity of the protective housing. This allows the camera used for data acquisition to be quickly assembled and installed into the inner cavity of the protective housing.

[0051] 3. The stop bar, pushed by the camera base, then drives the flow piston to continuously introduce gas from the inner chamber into the inner chamber of the air cylinder through the airflow hose. The increased air pressure in the inner chamber of the air cylinder causes the traction piston to gradually flip the transparent protective plate, which was originally in a folded state, into an upright state. During the process of pushing the camera into the inner chamber of the protective housing, the flow piston continuously draws gas from the inner chamber of the embedded cylinder into the inner chamber through the air source pipe. Then, the driving piston uses the extension rod to continuously pull the transparent protective plate, which is flipping from a folded state to an upright state, closer to the camera lens, and finally makes the upright transparent protective plate block the front of the camera lens. This design achieves anti-collision protection for the camera lens assembled and installed inside the protective housing. During the installation process, the folding protector used to protect the camera lens can simultaneously and automatically gradually change from a folded state to an extended upright state and gradually move towards the lens to protect it. Furthermore, the folding protector used to protect the camera is in a folded state before the camera is installed inside the protective housing. This makes it easy for people to push the camera into the inner cavity of the protective housing from the end opening when assembling and installing the camera inside the protective housing.

[0052] 4. As the driving piston continuously pulls the transparent protective plate towards the camera lens, the gas in the connecting cavity is continuously drawn into the inner cavity of the embedded cylinder through the pressure regulating air passage. Subsequently, the front piston continuously pulls the rear piston through the central connecting rod. The rear piston, following the lateral movement of the front piston, continuously pushes the gas in the mating cavity through the straight channel into the bladder groove. The increased air pressure inside the bladder groove expands the volume of the elastic bladder. Under the pulling force of the extension rod, the expanded elastic bladder adheres tightly to the side wall of the propulsion slide and absorbs and buffers the impact force acting on the transparent protective plate, further improving the anti-collision strength of the folding protector, and thus further improving the anti-collision protection capability of the camera lens.

[0053] 5. When the camera needs to be repaired or periodically maintained, first open the valve on the pressure relief pipe. After the gas in the air cylinder cavity is discharged through the pressure relief pipe, under the action of the third tension spring, the traction piston gradually drives the transparent protective plate, which was originally in an upright position and blocking the opening at the end of the protective housing, to gradually fold down to a horizontal folded state. At the same time, the gas that was originally injected from the cavity is also discharged through the airflow hose. Then, under the action of the second tension spring, the pin end gradually disengages from the vertical slot, making it convenient for people to remove the camera from the inner cavity of the protective housing for repair or periodic maintenance. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the overall structure of an unmanned aerial vehicle (UAV) mapping data acquisition system disclosed in a preferred embodiment of this application.

[0055] Figure 2 This is a schematic diagram of the structure of the acquisition unit in the UAV mapping data acquisition system disclosed in a preferred embodiment of this application.

[0056] Figure 3 This is a schematic diagram of the support structure in a UAV mapping data acquisition system disclosed in a preferred embodiment of this application.

[0057] Figure 4 This is a partial structural diagram of the folding protector in a UAV mapping data acquisition system disclosed in a preferred embodiment of this application.

[0058] Figure 5 This is an enlarged schematic diagram of a portion of the sliding base in a UAV mapping data acquisition system disclosed in a preferred embodiment of this application.

[0059] The following are the labeling instructions in the diagram: 1. UAV body; 2. Mounting frame; 3. Servo geared motor; 401. Protective shell; 402. Camera; 403. Camera base; 404. Flow piston; 405. Support rod; 406. First tension spring; 407. Airflow hose; 408. Embedded cylinder; 409. Extension rod; 410. Positioning piston; 411. Pin end; 412. Second tension spring; 413. Pressure regulating air passage; 501. Sliding base; 502. Air cylinder; 503. Traction rod; 504. Transparent protective plate; 505. Switch valve; 506. Traction piston; 507. Third tension spring; 508. Rear piston; 509. Elastic membrane; 510. Membrane groove; 511. Front piston; 512. Central connecting rod. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. The application will be further described in detail below with reference to the accompanying drawings.

[0061] Reference Figure 1 and Figure 2This application provides a UAV mapping data acquisition system, including a UAV body 1, a fixed frame 2 connected to the bottom of the UAV body 1, and an acquisition unit rotatably connected inside the fixed frame 2 via a rotating shaft. A servo reduction motor 3 for driving the acquisition unit to rotate up and down is connected to the side wall of the fixed frame 2, and the output shaft of the servo reduction motor 3 is connected to the end of the rotating shaft. The acquisition unit includes a protective shell 401 rotatably connected inside the fixed frame 2. A camera base 403 is attached to the bottom wall of the inner cavity of the protective shell 401, and a camera 402 is connected to the top of the camera base 403, with the top surface of the camera 402 attached to the top wall of the inner cavity of the protective shell 401. The protective shell 401 has an embedded chamber inside, and a flow-transmitting piston 404 is slidably connected inside the embedded chamber. A stop rod 405 is connected to the flow-transmitting piston 404, and the end of the stop rod 405 away from the flow-transmitting piston 404 passes through the protective shell 401. 1. On the inner sidewall of the cavity, a first tension spring 406 is connected to one end of the flow piston 404 near the abutment rod 405, and the other end of the first tension spring 406 is connected to the inner wall of the inner cavity. The protective housing 401 also has a sub-cavity, and a positioning piston 410 is slidably connected in the sub-cavity. The top of the positioning piston 410 is connected to a pin end 411, and the top of the pin end 411 passes through the inner bottom wall of the protective housing 401. The bottom of the positioning piston 410 is connected to a second tension spring 412, and the bottom end of the second tension spring 412 is fixedly connected to the bottom wall of the sub-cavity. The bottom of the camera base 403 has a vertical slot for the top of the pin end 411 to be snapped into it. An airflow hose 407 is connected inside the protective housing 401. A side branch conduit is fixedly connected to the sidewall of the airflow hose 407. A push-in groove is provided on the inner bottom wall of the protective housing 401, and a folding protector is provided in the push-in groove. The end of the side branch duct away from the airflow hose 407 is connected to the bottom of the cavity. This application enables the acquisition unit to perform high-altitude flight operations by driving the drone body 1, thereby achieving the acquisition of surveying and mapping data. When the acquisition unit encounters a sudden damage and fall of the drone body 1 during the acquisition of surveying and mapping data, the lens of the camera 402 can be protected against collision by a folding protector located in front of the camera 402 with a folding and retracting function and in the unfolded state. This effectively avoids the possibility of the lens of the camera 402 being damaged by hard objects during the fall of the drone body 1.The camera 402 is quickly pushed into the inner cavity of the protective housing 401. When the end of the camera base 403 abuts against the side wall of the inner cavity of the protective housing 401, the abutment rod 405 is pushed into the inner cavity by the camera base 403. The abutment rod 405, pushed by the camera base 403, then drives the flow piston 404 to continuously introduce the gas in the inner cavity into the inner cavity of the air cylinder 502 through the air flow hose 407. The gas entering the air flow hose 407 from the inner cavity is diverted to the inner cavity of the secondary cavity through the side branch conduit. After the air pressure inside the secondary cavity increases, it pushes the pin end 411 to snap into the vertical slot at the bottom of the camera base 403, thereby fixing the position of the camera 402 pushed into the inner cavity of the protective housing 401, so that the camera 402 used for data acquisition can be quickly assembled and installed into the inner cavity of the protective housing 401.

[0062] Reference Figures 2 to 4 This application provides an embodiment of an unmanned aerial vehicle (UAV) mapping data acquisition system. The folding protector includes a sliding base 501 slidably connected within a propulsion groove. A transparent protective plate 504, which can be flipped up and down, is rotatably connected to the sliding base 501. The transparent protective plate 504 is preferably made of transparent tempered glass. An air cylinder 502 is rotatably connected to the top of the sliding base 501, away from the transparent protective plate 504. A traction piston 506 is slidably connected to the inner cavity of the air cylinder 502. The bottom of the traction piston 506... A third tension spring 507 is connected, with its bottom end connected to the bottom wall of the inner cavity of the air cylinder 502. A traction rod 503 is connected to the top of the traction piston 506. The top end of the traction rod 503 passes through the top of the air cylinder 502 and is rotatably connected to the side wall of the transparent protective plate 504. A pressure relief pipe is fixedly connected to the lower part of the side wall of the air cylinder 502. A switch valve 505 is provided on the pressure relief pipe. A propulsion pneumatic component is also provided on the sliding base 501, which can drive the sliding base 501 to reciprocate within the propulsion groove. One end of the airflow hose 407 is connected to the end of the embedded cavity away from the first tension spring 406, and the other end passes through the side wall of the protective shell 401 and is fixedly connected to the bottom end of the air cylinder 502.

[0063] Reference Figure 4 and Figure 5This application provides an unmanned aerial vehicle (UAV) mapping data acquisition system. The propulsion pneumatic component includes an embedded cylinder 408 fixedly connected inside a protective housing 401. A drive piston is slidably connected inside the embedded cylinder 408, and an extension rod 409 is connected to the drive piston. A pressure regulating air passage 413 is provided inside the extension rod 409. The end of the extension rod 409 away from the drive piston passes through a propulsion groove and connects to the end of a sliding base 501. An air source pipe connected inside the protective housing 401 is fixedly connected to the end of the embedded cylinder 408 away from the sliding base 501, and the end of the air source pipe away from the embedded cylinder 408 enters the embedded cavity. The propulsion pneumatic component also includes a connecting cavity, a mating cavity, and a connecting chamber disposed inside the sliding base 501. The base 501 has two vertically arranged bladder grooves 510 near the end of the extension rod 409. An elastic membrane 509 is connected within each bladder groove 510. A front piston 511 is slidably connected to the connecting cavity, and a rear piston 508 is slidably connected to the mating cavity. A central connecting rod 512 is connected to the front piston 511. Straight channels are provided inside the sliding base 501 at positions corresponding to the two bladder grooves 510. Exhaust channels are provided inside the sliding base 501 at positions corresponding to the connecting cavity and the mating cavity. One end of one exhaust channel is connected to the end of the connecting cavity away from the extension rod 409, and the other end passes through the side wall of the sliding base 501. One end of the other exhaust channel is connected to the end of the mating cavity away from the extension rod 409, and the other end also passes through the side wall of the sliding base 501. One end of the straight channel is connected to the corresponding bladder groove 510, and the other end is connected to the mating cavity. The end of the central connecting rod 512 away from the front piston 511 passes into the mating cavity and connects to the rear piston 508. One end of the pressure regulating air passage 413 passes through the side wall of the extension rod 409, and the other end passes into the interior of the sliding base 501 and connects to the end of the connecting cavity near the extension rod 409.The abutment rod 405, pushed by the camera base 403, drives the flow piston 404 to continuously introduce gas from the inner chamber into the inner chamber of the air cylinder 502 through the airflow hose 407. The increased air pressure in the inner chamber of the air cylinder 502 causes the traction piston 506 to gradually flip the transparent protective plate 504 from a folded state to an upright state. During the process of pushing the camera 402 into the inner chamber of the protective housing 401, the flow piston 404 continuously draws gas from the inner chamber of the embedded cylinder 408 into the inner chamber through the air source pipe. Then, the driving piston, through the extension rod 409, continuously pulls the transparent protective plate 504, which is flipping from a folded state to an upright state, closer to the lens of the camera 402, and finally makes the upright transparent protective plate 504 block the camera 402. 2. In front of the lens, the lens of the camera 402 assembled and installed in the inner cavity of the protective housing 401 is protected against collision. This allows the folding protector used to protect the lens of the camera 402 to gradually and automatically change from a folded state to an extended upright state and gradually move towards the lens to protect it during the process of installing the camera 402 into the inner cavity of the protective housing 401. It also ensures that the folding protector used to protect the camera 402 is in a folded state before the camera 402 is installed inside the protective housing 401. This makes it convenient for people to push the camera 402 into the inner cavity of the protective housing 401 from the end opening when assembling and installing the camera 402 into the inner cavity of the protective housing 401.

[0064] This application provides an unmanned aerial vehicle (UAV) mapping data acquisition system, which includes the following steps.

[0065] S1. Quickly push the camera 402 into the inner cavity of the protective housing 401. When the end of the camera base 403 abuts against the side wall of the inner cavity of the protective housing 401, the abutment rod 405 is pushed into the inner cavity by the camera base 403.

[0066] S2, the abutment rod 405, pushed by the camera base 403, then drives the flow piston 404 to continuously introduce the gas in the inner cavity into the inner cavity of the air cylinder 502 through the air flow hose 407.

[0067] S3. The increased air pressure inside the air cylinder 502 causes the transparent protective plate 504, which was originally in a folded state, to gradually flip up to an upright state via the traction piston 506.

[0068] S4. The gas entering the airflow hose 407 from the inner cavity is diverted to the sub-cavity through the side branch conduit. After the air pressure inside the sub-cavity increases, it pushes the pin end 411 to snap into the vertical slot at the bottom of the camera base 403, thereby fixing the position of the camera 402 pushed into the inner cavity of the protective housing 401.

[0069] S5. During the process of pushing the camera 402 into the inner cavity of the protective housing 401, the flow piston 404 continuously draws the gas in the inner cavity of the inner cylinder 408 into the inner cavity through the gas source pipe. Then, the piston drives the extension rod 409 to continuously pull the transparent protective plate 504, which is flipping from a folded state to an upright state, closer to the lens of the camera 402, and finally makes the transparent protective plate 504, which is in an upright state, block in front of the lens of the camera 402.

[0070] S6. When the drive piston continuously pulls the transparent protective plate 504 toward the lens of the camera 402, the gas in the connecting cavity is continuously drawn into the inner cavity of the embedded cylinder 408 through the pressure regulating air passage 413. Then, the front piston 511 continuously pulls the rear piston 508 to move through the central connecting rod 512.

[0071] S7. Following the transverse movement of the front piston 511, the rear piston 508 continuously pushes the gas in the mating cavity through the straight channel into the bladder groove 510. The increased air pressure inside the bladder groove 510 causes the elastic bladder 509 to expand in volume. Under the pulling force of the extension rod 409, the expanded elastic bladder 509 adheres tightly to the side wall of the propulsion chute and absorbs and buffers the impact force acting on the transparent protective plate 504.

[0072] Working principle.

[0073] The camera 402 is quickly pushed into the inner cavity of the protective housing 401. When the end of the camera base 403 abuts against the side wall of the inner cavity of the protective housing 401, the abutment rod 405 is pushed into the inner cavity by the camera base 403. The abutment rod 405, pushed by the camera base 403, then drives the flow piston 404 to continuously introduce the gas in the inner cavity into the inner cavity of the air cylinder 502 through the air flow hose 407. The gas entering the air flow hose 407 from the inner cavity is diverted to the inner cavity of the secondary cavity through the side branch conduit. After the air pressure inside the secondary cavity increases, it pushes the pin end 411 to snap into the vertical slot at the bottom of the camera base 403, thereby fixing the position of the camera 402 pushed into the inner cavity of the protective housing 401, so that the camera 402 used for data acquisition can be quickly assembled and installed into the inner cavity of the protective housing 401.

[0074] The abutment rod 405, pushed by the camera base 403, drives the flow piston 404 to continuously introduce gas from the inner chamber into the inner chamber of the air cylinder 502 through the airflow hose 407. The increased air pressure in the inner chamber of the air cylinder 502 causes the traction piston 506 to gradually flip the transparent protective plate 504 from a folded state to an upright state. During the process of pushing the camera 402 into the inner chamber of the protective housing 401, the flow piston 404 continuously draws gas from the inner chamber of the embedded cylinder 408 into the inner chamber through the air source pipe. Then, the driving piston, through the extension rod 409, continuously pulls the transparent protective plate 504, which is flipping from a folded state to an upright state, closer to the lens of the camera 402, and finally makes the upright transparent protective plate 504 block the camera 402. 2. In front of the lens, the lens of the camera 402 assembled and installed in the inner cavity of the protective housing 401 is protected against collision. This allows the folding protector used to protect the lens of the camera 402 to gradually and automatically change from a folded state to an extended upright state and gradually move towards the lens to protect it during the process of installing the camera 402 into the inner cavity of the protective housing 401. It also ensures that the folding protector used to protect the camera 402 is in a folded state before the camera 402 is installed inside the protective housing 401. This makes it convenient for people to push the camera 402 into the inner cavity of the protective housing 401 from the end opening when assembling and installing the camera 402 into the inner cavity of the protective housing 401. As the driving piston continuously pulls the transparent protective plate 504 toward the lens of the camera 402, the gas in the connecting cavity is continuously drawn into the inner cavity of the embedded cylinder 408 through the pressure regulating air passage 413. Then, the front piston 511 continuously pulls the rear piston 508 to move through the central connecting rod 512. The rear piston 508, which moves laterally with the front piston 511, continuously pushes the gas in the mating cavity through the straight channel into the bladder groove 510. The increased air pressure inside the bladder groove 510 expands the volume of the elastic bladder 509. Under the pulling force of the extension rod 409, the expanded elastic bladder 509 is tightly attached to the side wall of the propulsion chute and absorbs and buffers the impact force acting on the transparent protective plate 504.

[0075] When the camera 402 needs to be repaired or periodically maintained, first open the switch valve 505 on the pressure relief pipe. After the gas in the inner cavity of the air cylinder 502 is discharged through the pressure relief pipe, under the action of the third tension spring 507, the traction piston 506 gradually drives the transparent protective plate 504, which was originally in an upright state and blocked the opening at the end of the protective housing 401, to gradually fold down to a horizontal folded state. At the same time, the gas that was originally injected from the cavity is also discharged through the airflow hose 407. Then, under the action of the second tension spring 412, the pin end 411 gradually disengages from the vertical slot, making it convenient for people to remove the camera 402 from the inner cavity of the protective housing 401 for repair or periodic maintenance.

Claims

1. A UAV mapping data acquisition system, characterized in that: The device includes a drone body (1), a fixed frame (2) is connected to the bottom of the drone body (1), a data acquisition unit is rotatably connected inside the fixed frame (2) via a rotating shaft, and a servo reduction motor (3) for driving the data acquisition unit to rotate up and down is connected to the side wall of the fixed frame (2), and the output shaft of the servo reduction motor (3) is connected to the end of the rotating shaft. The acquisition unit includes a protective housing (401) rotatably connected inside the fixed frame (2), a camera base (403) is attached to the bottom wall of the inner cavity of the protective housing (401), a camera (402) is connected to the top of the camera base (403), and the top surface of the camera (402) is attached to the top wall of the inner cavity of the protective housing (401). The protective housing (401) has an embedded cavity inside, and a flow piston (404) is slidably connected inside the embedded cavity. A stop rod (405) is connected to the flow piston (404), and the end of the stop rod (405) away from the flow piston (404) passes through the inner cavity side wall of the protective housing (401). The flow piston (404) is connected to a first tension spring (406) at one end near the abutment rod (405), and the other end of the first tension spring (406) is connected to the inner wall of the inner cavity. The protective housing (401) is further provided with a sub-cavity, and a positioning piston (410) is slidably connected in the sub-cavity. The top of the positioning piston (410) is connected to a pin end (411), and the top of the pin end (411) passes through the bottom wall of the protective housing (401). The bottom of the positioning piston (410) is connected to a second tension spring (412), and the bottom end of the second tension spring (412) is fixedly connected to the bottom wall of the sub-cavity. The bottom of the camera base (403) is provided with a vertical slot for the top of the locking end (411) to be snapped into it; The protective housing (401) is internally connected to an airflow hose (407), and a side branch conduit is fixedly connected to the side wall of the airflow hose (407). The protective housing (401) has a propulsion groove on the bottom wall of its inner cavity, and a folding protector is provided in the propulsion groove.

2. The UAV mapping data acquisition system according to claim 1, characterized in that: The end of the lateral conduit away from the airflow hose (407) is connected to the bottom of the cavity.

3. The UAV mapping data acquisition system according to claim 1, characterized in that: The folding protector includes a sliding base (501) slidably connected to the push-in groove, and a transparent protective plate (504) that can be flipped up and down is rotatably connected to the sliding base (501). The top of the sliding base (501) away from the transparent protective plate (504) is also rotatably connected to an air cylinder (502). The inner cavity of the air cylinder (502) is slidably connected to a traction piston (506). The bottom of the traction piston (506) is connected to a third tension spring (507), and the bottom end of the third tension spring (507) is connected to the bottom wall of the inner cavity of the air cylinder (502). The top of the traction piston (506) is connected to a traction rod (503), and the top of the traction rod (503) passes through the top of the air cylinder (502) and is rotatably connected to the side wall of the transparent protective plate (504). The lower part of the side wall of the air cylinder (502) is fixedly connected to a pressure relief pipe, and a switch valve (505) is provided on the pressure relief pipe. The sliding base (501) is also provided with a propulsion pneumatic component that can drive the sliding base (501) to reciprocate within the propulsion groove.

4. The UAV mapping data acquisition system according to claim 3, characterized in that: One end of the airflow hose (407) is connected to the end of the embedded chamber away from the first tension spring (406), and the other end passes through the side wall of the protective housing (401) and is fixedly connected to the bottom end of the air cylinder (502).

5. The UAV mapping data acquisition system according to claim 3, characterized in that: The propulsion pneumatic component includes an embedded cylinder (408) fixedly connected inside the protective housing (401). A drive piston is slidably connected inside the embedded cylinder (408), and an extension rod (409) is connected to the drive piston. A pressure regulating air passage (413) is provided inside the extension rod (409). The end of the extension rod (409) away from the drive piston passes through the propulsion groove and is connected to the end of the sliding base (501); The end of the embedded cylinder (408) away from the sliding base (501) is fixedly connected to an air source pipe connected to the inside of the protective shell (401), and the end of the air source pipe away from the embedded cylinder (408) passes into the interior of the embedded cavity. The propulsion pneumatic component also includes a connecting cavity and a mating cavity disposed inside the sliding base (501), and two bladder grooves (510) disposed on the sliding base (501) near the end of the extension rod (409) and arranged vertically. An elastic membrane (509) is connected inside the cyst groove (510), and a front piston (511) is slidably connected inside the connecting cavity, while a rear piston (508) is slidably connected inside the cavity. A central connecting rod (512) is connected to the front piston (511). The sliding base (501) has straight channels at the positions corresponding to the two bladder grooves (510); The sliding base (501) is provided with exhaust channels at the corresponding positions of the connecting cavity and the mating cavity. One end of one exhaust channel is connected to the end of the connecting cavity away from the extension rod (409), and the other end passes through the side wall of the sliding base (501). One end of the other exhaust channel is connected to the end of the mating cavity away from the extension rod (409), and the other end also passes through the side wall of the sliding base (501).

6. The UAV mapping data acquisition system according to claim 5, characterized in that: One end of the straight channel is connected to the corresponding bladder groove (510), and the other end is connected to the mating part.

7. The UAV mapping data acquisition system according to claim 5, characterized in that: The end of the central connecting rod (512) away from the front piston (511) passes into the mating cavity and connects with the rear piston (508).

8. The UAV mapping data acquisition system according to claim 5, characterized in that: One end of the pressure regulating air passage (413) passes through the side wall of the extension rod (409), and the other end passes into the interior of the sliding base (501) and is connected to the end of the connecting cavity near the extension rod (409).

9. A method of using an unmanned aerial vehicle (UAV) mapping data acquisition system according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Quickly push the camera (402) into the inner cavity of the protective housing (401). When the end of the camera base (403) abuts against the side wall of the inner cavity of the protective housing (401), the abutment rod (405) is pushed into the inner cavity by the camera base (403). S2. The abutment rod (405) pushed by the camera base (403) then drives the flow piston (404) to continuously introduce the gas in the inner cavity into the inner cavity of the air cylinder (502) through the air flow hose (407); S3. The increased air pressure inside the air cylinder (502) causes the transparent protective plate (504), which was originally in a folded state, to gradually flip up to an upright state through the traction piston (506). S4. The gas entering the airflow hose (407) from the inner cavity is diverted to the sub-cavity through the side branch conduit. After the air pressure inside the sub-cavity increases, it pushes the pin end (411) to snap into the vertical slot at the bottom of the camera base (403), thereby fixing the position of the camera (402) pushed into the inner cavity of the protective housing (401). S5. During the process of pushing the camera (402) into the inner cavity of the protective housing (401), the flow piston (404) continuously draws the gas in the inner cavity of the inner cylinder (408) into the inner cavity through the gas source pipe. Then, the piston drives the extension rod (409) to continuously pull the transparent protective plate (504) which is flipping from a folded state to an upright state closer to the lens of the camera (402), and finally makes the transparent protective plate (504) in the upright state block the front of the lens of the camera (402). S6. When the driving piston continuously pulls the transparent protective plate (504) toward the lens of the camera (402), the gas in the connecting cavity is continuously drawn into the inner cavity of the embedded cylinder (408) through the pressure regulating air passage (413). Then the front piston (511) continuously pulls the rear piston (508) to move through the middle connecting rod (512). S7. Following the transverse movement of the front piston (511), the rear piston (508) continuously pushes the gas in the mating cavity through the straight channel into the bladder groove (510). The increased air pressure inside the bladder groove (510) causes the elastic bladder membrane (509) to expand in volume. Under the pulling force of the extension rod (409), the expanded elastic bladder membrane (509) adheres tightly to the side wall of the propulsion chute and absorbs and buffers the impact force acting on the transparent protective plate (504).

Images