Aerial pressure sensor of unmanned aerial vehicle

Abstract

The utility model belongs to the technical field of unmanned aerial vehicle aero-engines, and particularly relates to an unmanned aerial vehicle aero-engine pressure sensor which comprises an air inlet channel, a rotating cap is fixed to the outer side of one end of a sensor body, a sensor rotating head is installed on one side of the rotating cap, and a spherical protective cap is arranged at an end opening of the air inlet channel. The multiple air inlets are formed in the outer side of the protective cap, the dust flow blocking effect can be achieved at the positions of the air inlets, dust is prevented from directly entering the air inlet channel, meanwhile, the multiple air inlets are formed, when one air inlet is blocked, the other air inlets can still achieve air inlet operation on the air inlet channel, and the air inlet channel is not prone to being blocked. The effect of dispersing air inlet can be achieved, the detection effect can be better guaranteed, the use effect of sensing is improved, after glue is injected into the sensor body, the extrusion pipe is rotated into the sensor body by rotating the locking cap, extrusion of glue can be achieved, and it is guaranteed that the glue completely acts on packaging of a conversion circuit board.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicles (UAVs), in particular to an aero-engine pressure sensor for UAVs. Background Art

[0002] Unmanned aerial vehicles (UAVs), also known as drones, are unmanned aircraft controlled by radio remote control equipment and self-contained program control devices. They have no cockpit but are equipped with autopilots, program control devices and other equipment. Personnel on the ground, on ships or at the remote control station of the mother aircraft use radar and other equipment to track, locate, remotely control, telemeter and transmit data. In order to provide power for UAVs, the internal combustion engine of motorcycles is optimized and modified to become the engine of UAVs.

[0003] An internal combustion engine is a power machine that burns fuel inside the machine and converts the heat energy released directly into power.

[0004] When the UAV's aero-engine is operating, it is necessary to detect the pressure inside the engine. Since dust is generated when the fuel is burned in the internal combustion engine cylinder, the dust is easily blocked in the intake channel of the pressure sensor during long-term operation, affecting the detection effect and accuracy. Therefore, a UAV aero-engine pressure sensor is proposed to address the above problem. Utility Model Content

[0005] In order to make up for the deficiencies of the existing technology and address the problems existing in the existing equipment, the utility model proposes a UAV aero-engine pressure sensor.

[0006] The technical solution adopted by the utility model to solve the technical problem is a UAV aero-engine pressure sensor, including an air intake channel, a rotating cap fixed to the outside of one end of the sensor body, a sensor rotating head installed on one side of the rotating cap, and an air intake channel opened inside the sensor rotating head;

[0007] A protective cap is fixedly connected to the port of the sensor rotating head, and an air inlet is opened at an equal angle on the outer side of the protective cap;

[0008] An internal thread is provided on the inner wall of the other end of the sensor body. The other end of the sensor body is not provided with a locking cap. An extrusion tube is provided at the end of the locking cap. The extrusion tube can be rotatably assembled into the other end of the sensor body.

[0009] An annular shock-absorbing rubber ring is fixed to the inner wall of the locking cap. By rotating the locking cap, the extrusion tube is rotated into the sensor body, which can realize the extrusion of the rubber material and ensure that the rubber material fully acts on the packaging of the conversion circuit board. At the same time, the locking cap limits the protective wire sleeve, which can ensure the stability of the wiring harness.

[0010] Preferably, a mounting cavity is provided inside the sensor body, a pressure-bearing paddle is installed in the mounting cavity, and the mounting cavity is communicated with the air inlet passage.

[0011] The interior of the rotating cap is provided with a mounting groove, in which a conversion circuit board is mounted. The conversion circuit board is connected to the pressure-receiving paddle via a data line.

[0012] A transmission line is connected to the conversion circuit board, and the outer side of the transmission line is wrapped with a protective wire sleeve, and tightening caps are provided at both ends of the protective wire sleeve, one of the tightening caps passes through the locking cap, and the outer side surface of the tightening cap is tightly attached to the inner side surface of the shock-absorbing rubber ring. By providing the shock-absorbing rubber ring, the shock-absorbing rubber ring can reduce the movement of the tightening cap during bumpy vibration, while improving the sealing effect of the wiring harness connection and improving the line safety.

[0013] The transmission lines are respectively a positive power line, a negative power line and a signal output line, which can ensure the normal operation of the sensor.

[0014] The utility model is beneficial in that:

[0015] The utility model provides a spherical protective cap at the port of the air inlet channel, and by opening a plurality of air inlets on the outside of the protective cap, a dust blocking effect can be achieved at the position of the air inlet, thereby preventing dust from directly entering the air inlet channel. At the same time, multiple air inlets are provided. When one of the air inlets is blocked, the other air inlets can still achieve the air intake operation of the air inlet channel, thereby achieving the effect of dispersed air intake, better ensuring the detection effect, and improving the use effect of the sensor;

[0016] After injecting glue into the sensor body, the locking cap is rotated to rotate the extrusion tube into the sensor body, which can realize the extrusion of the glue and ensure that the glue completely acts on the package of the conversion circuit board. At the same time, the locking cap limits the protection of the wire sleeve to ensure the stability of the wiring harness. By setting a shock-absorbing rubber ring, the shock-absorbing rubber ring can reduce the activity of the tightening cap during bumps and vibrations, while improving the sealing effect of the wiring harness connection and improving line safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the overall structure of the sensor;

[0019] Figure 2 This is a schematic diagram of the sensor's rotating head structure;

[0020] Figure 3 This is a cross-sectional structural diagram of the sensor body;

[0021] Figure 4 Schematic diagram of the installation structure of the conversion circuit board;

[0022] In the figure: 1. Air inlet channel; 2. Sensor rotating head; 3. Rotating cap; 4. Sensor body; 5. Tightening cap; 6. Protective wire sleeve; 7. Transmission line; 8. Mounting cavity; 9. Pressure pick; 10. Sealing ring; 11. Conversion circuit board; 12. Protective cap; 13. Air inlet; 14. Locking cap; 15. Shock-absorbing rubber ring; 16. Extrusion tube; 17. Internal thread. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 As shown, a UAV aero-engine pressure sensor includes an air inlet channel 1, a rotating cap 3 is fixed to the outside of one end of the sensor body 4, a sensor rotating head 2 is installed on one side of the rotating cap 3, and the air inlet channel 1 is opened inside the sensor rotating head 2;

[0025] A protective cap 12 is fixedly connected to the port of the sensor rotating head 2, and an air inlet 13 is opened at an equal angle on the outer side of the protective cap 12. When the aircraft engine of the drone is operating, it is necessary to detect the pressure in the engine. Since dust is generated when the fuel is burned in the cylinder of the internal combustion engine, the dust is easily blocked in the intake channel of the pressure sensor during long-term operation, affecting the detection effect and accuracy. In order to avoid the accumulation of dust in the cylinder, a spherical protective cap 12 is provided at the port of the intake channel 1. By opening a plurality of air inlets 13 on the outer side of the protective cap 12, at the position of the air inlet 13, a dust blocking effect can be achieved, preventing dust from directly entering the intake channel 1. At the same time, a plurality of air inlets 13 are provided. When one of the air inlets 13 is blocked, the other air inlets 13 can still realize the intake operation of the intake channel 1, which can achieve the effect of dispersed air intake, better ensure the detection effect, and improve the use effect of the sensor.

[0026] An internal thread 17 is provided on the inner wall of the other end of the sensor body 4. The other end of the sensor body 4 is not provided with a locking cap 14. An extrusion tube 16 is provided at the end of the locking cap 14. The extrusion tube 16 can be rotatably assembled into the other end of the sensor body 4. An annular shock-absorbing rubber ring 15 is fixed to the inner wall of the locking cap 14.

[0027] An installation cavity 8 is provided inside the sensor body 4, and a pressure-receiving paddle 9 is installed in the installation cavity 8. The installation cavity 8 is connected to the air intake channel 1. An installation groove is provided inside the rotating cap 3, and a conversion circuit board 11 is installed in the installation groove. The conversion circuit board 11 is connected to the pressure-receiving paddle 9 through a data line.

[0028] The conversion circuit board 11 is connected to a transmission line 7, the outer side of the transmission line 7 is wrapped with a protective wire sleeve 6, and tightening caps 5 are provided at both ends of the protective wire sleeve 6;

[0029] One of the tightening caps 5 is arranged to pass through the locking cap 14, and the outer side surface of the tightening cap 5 is in close contact with the inner side surface of the shock-absorbing rubber ring 15;

[0030] During operation, the operation of the conversion circuit board 11 is stable. After the conversion circuit board 11 is installed in the sensor body 4, the conversion circuit board 11 can be encapsulated by injecting glue into the sensor body 4. During encapsulation, since the glue is injected into the sensor body 4, the reasonable effect of the glue cannot be guaranteed. In this solution, when encapsulating the conversion circuit board 11, after the glue is injected into the sensor body 4, the extrusion tube 16 is rotated into the sensor body 4 by rotating the locking cap 14, so as to achieve the extrusion of the glue and ensure that the glue completely acts on the encapsulation of the conversion circuit board 11. At the same time, the locking cap 14 limits the position of the protective wire sleeve 6, which can ensure the stability of the wiring harness.

[0031] By providing the shock-absorbing rubber ring 15, the shock-absorbing rubber ring 15 can reduce the movement of the tightening cap 5 during the bumpy vibration process, while improving the sealing effect of the wire harness connection and improving the line safety.

[0032] A pressure-bearing paddle 9 is provided inside the rotating cap 3, and a mounting cavity 8 is installed inside the pressure-bearing paddle 9. The pressure-bearing paddle 9 is communicated with the air intake channel 1. A mounting groove is provided inside the rotating cap 3, and a conversion circuit board 11 is installed in the mounting groove. The conversion circuit board 11 is connected to the mounting cavity 8 through a data line. A mounting groove is provided inside the rotating cap 3, and a conversion circuit board 11 is installed in the mounting groove. The conversion circuit board 11 is connected to the pressure-bearing paddle 9 through a data line.

[0033] During operation, pressurized gas enters the mounting cavity 8 through the air intake channel 1, acts on the pressure-bearing paddle 9, and realizes signal conversion under the action of the conversion circuit board 11, transmits the pressure information in the engine, and realizes the detection of the cylinder pressure in various states of the engine.

[0034] Working principle: when the aircraft engine of the UAV is operating, it is necessary to detect the pressure inside the engine. Since dust is generated when the fuel is burned in the cylinder of the internal combustion engine, the dust is easy to clog the air intake channel of the pressure sensor during long-term operation, affecting the detection effect and accuracy. In order to avoid the accumulation of dust in the cylinder, a spherical protective cap 12 is provided at the port of the air intake channel 1. By opening a plurality of air inlets 13 on the outside of the protective cap 12, the air inlet 13 is positioned to achieve a dust blocking effect, preventing dust from directly entering the air intake channel 1. At the same time, a plurality of air inlets 13 are provided. When one of the air inlets 13 is blocked, the other air inlets 13 can still realize the air intake operation of the air intake channel 1, which can achieve the effect of dispersed air intake, better ensure the detection effect, and improve the use effect of the sensor.

[0035] During operation, pressurized gas enters the mounting cavity 8 through the air intake channel 1, acts on the pressure-receiving paddle 9, and realizes signal conversion under the action of the conversion circuit board 11, transmits the pressure information in the engine, and realizes the detection of the cylinder pressure in various states of the engine;

[0036] The operation of the conversion circuit board 11 is stable. After the conversion circuit board 11 is installed in the sensor body 4, the conversion circuit board 11 can be encapsulated by injecting glue into the sensor body 4. During the encapsulation, since the glue is injected into the sensor body 4, the reasonable effect of the glue cannot be guaranteed. In this solution, when encapsulating the conversion circuit board 11, after the glue is injected into the sensor body 4, the extrusion tube 16 is rotated into the sensor body 4 by rotating the locking cap 14, so that the glue can be squeezed and ensured that the glue completely acts on the encapsulation of the conversion circuit board 11. At the same time, the locking cap 14 limits the position of the protective wire sleeve 6, which can ensure the stability of the wiring harness.

[0037] By providing the shock-absorbing rubber ring 15, the shock-absorbing rubber ring 15 can reduce the movement of 5 during the bumpy vibration process, while improving the sealing effect of the wire harness connection and improving the line safety.

[0038] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A UAV aero-engine pressure sensor, characterized by: The sensor comprises an air inlet passage (1), a rotating cap (3) is fixed to the outside of one end of a sensor body (4), a sensor rotating head (2) is mounted on one side of the rotating cap (3), and an air inlet passage (1) is provided inside the sensor rotating head (2); A protective cap (12) is fixedly connected to the port of the sensor rotating head (2), and an air inlet (13) is formed on the outer side surface of the protective cap (12) at equal angles; An internal thread (17) is provided on the inner wall of the other end of the sensor body (4), and the other end of the sensor body (4) is not provided with a locking cap (14). An extrusion tube (16) is provided at the end of the locking cap (14), and the extrusion tube (16) can be rotatably assembled into the other end of the sensor body (4); An annular shock-absorbing rubber ring (15) is fixed to the inner wall of the locking cap (14).

2. The UAV aero-engine pressure sensor according to claim 1, characterized in that: An installation cavity (8) is provided inside the sensor body (4), a pressure-bearing paddle (9) is installed in the installation cavity (8), and the installation cavity (8) is communicated with the air inlet channel (1).

3. The UAV aero-engine pressure sensor according to claim 1, characterized in that: The interior of the rotating cap (3) is provided with a mounting groove, in which a conversion circuit board (11) is mounted, and the conversion circuit board (11) is connected to the pressure-receiving paddle (9) via a data line.

4. The UAV aero-engine pressure sensor according to claim 1, characterized in that: A transmission line (7) is connected to the conversion circuit board (11), the outer side of the transmission line (7) is wrapped with a protective wire sleeve (6), and tightening caps (5) are provided at both ends of the protective wire sleeve (6).

5. The UAV aero-engine pressure sensor according to claim 1, characterized in that: One of the tightening caps (5) is arranged to penetrate the locking cap (14), and the outer side surface of the tightening cap (5) is in close contact with the inner side surface of the shock-absorbing rubber ring (15).

6. The UAV aero-engine pressure sensor according to claim 1, characterized in that: The transmission lines (7) are respectively a positive power line, a negative power line and a signal output line.

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