Radio altimeter system with low failure rate

Abstract

The utility model relates to the technical field of radio altimeters, in particular to a radio altimeter system with low failure rate, which comprises a radio altimeter system main body, the radio altimeter system main body consists of a display, a transceiver, a transmitting antenna and a receiving antenna, and each of the transmitting antenna and the receiving antenna comprises an antenna body and a mounting seat. The center of one end face of the antenna body is fixedly provided with a cable seat through a mounting screw, and the center of one end face, far away from the antenna body, of the cable seat is provided with an antenna interface. The differential frequency signal voltage of the antenna circuit is prevented from being interfered to a certain extent, meanwhile, a fault maintenance signal can be sent out in time, the sealing performance is high, maintenance and management are timely carried out, the fault rate of the whole system is greatly reduced compared with the existing fault rate, and the influence on the operation of a machine body is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of radio altimeters, in particular to a radio altimeter system with a low failure rate. Background Art

[0002] The radio altimeter system is a relatively important self-contained navigation electronic device in modern aircraft. Its main function is to measure the actual height between the aircraft and the ground in real time and provide it to the pilot for use during approach, landing and flight. The low-altitude radio altimeter installed on the aircraft can accurately measure the flight altitude of 0 to 1500m. Its normal operation and accurate output information are crucial for the pilot or the autopilot to operate the aircraft.

[0003] In the daily maintenance of aircraft, flight crews often report problems with radio altimeter indications. Some of these problems are caused by quality problems with the transceiver, antenna, and high-frequency cable itself. In the process of installing the radio altimeter antenna, if the antenna joint is not tightly sealed or the antenna sealant leaks, moisture will enter the feeder, causing the difference frequency signal voltage of the antenna line to be disturbed to a certain extent, which will have a certain impact on the authenticity of the radio altimeter calculation and cause the ECAM to have an RA warning. The radio altimeter transceiver judges antenna failures by monitoring the characteristic impedance of the antenna. When moisture appears in the antenna and cable, the antenna characteristic impedance is within the normal range, and the antenna altimeter transceiver is difficult to send a wireless fault maintenance signal, resulting in a high overall failure rate and affecting the operation of the aircraft.

[0004] Therefore, it is necessary to design a radio altimeter system with a low failure rate to solve the problems in the above-mentioned background technology. Utility Model Content

[0005] The utility model aims to provide a radio altimeter system with a low failure rate to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A radio altimeter system with a low failure rate comprises a radio altimeter system body, wherein the radio altimeter system body comprises a display, a transceiver, a transmitting antenna and a receiving antenna, wherein the transmitting antenna and the receiving antenna both comprise an antenna body and a mounting seat, wherein a cable seat is fixedly mounted at the center of one end face of the antenna body by means of mounting screws, an antenna interface is arranged at the center of one end face of the cable seat away from the antenna body, a hard protective cable interface tube is fixedly mounted around an end face of the cable seat away from the antenna body and close to the antenna interface, a vacuum cavity is provided inside the hard protective cable interface tube, a flexible sealed airbag ring is movably mounted around a port of the vacuum cavity away from the antenna interface, a vacuum sensor is fixedly mounted on the inner wall of the vacuum cavity, and an exhaust check valve and an air intake check valve are fixedly mounted on the outer surface of the hard protective cable interface tube.

[0008] As a preferred solution of the utility model, the exhaust check valve and the air intake check valve act on the vacuum chamber and the flexible sealed airbag ring respectively, and the exhaust check valve and the air intake check valve are respectively connected to the electric suction pump and the electric intake pump through the trachea system.

[0009] As a preferred solution of the utility model, the antenna body outer shell and the mounting seat are integrally formed, the four corners of the mounting seat are fixedly connected to the fuselage through a body fixing component, and a rubber sealing ring is embedded and installed around the mounting seat near one side of the fuselage near the cable seat.

[0010] As a preferred solution of the utility model, the display and the transceiver, the transceiver and the transmitting antenna, and the receiving antenna are all electrically connected via cables.

[0011] As a preferred solution of the utility model, the transceiver is fixedly mounted with bases at the four corners, and one end face of the transceiver is provided with a power socket, a transmitting socket and a receiving socket.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the air intake one-way valve is opened, and the electric air intake pump is used to inflate the flexible airtight airbag ring through the air pipe, and then the flexible airtight airbag ring tightly wraps the outer surface of the cable plugged into the antenna interface until there is no gap, and then the exhaust one-way valve is opened, and the vacuum chamber is evacuated by the electric suction pump until it reaches a vacuum state and completes the sealing. At the same time, the vacuum sensor detects the environment inside the vacuum chamber in real time. If an abnormality occurs, the automatic control system continues to seal and vacuumize, and issues a warning, which can effectively prevent water vapor from entering the feeder when the antenna joint is not sealed tightly or the antenna sealing glue leaks, and avoids certain interference to the difference frequency signal voltage of the antenna line. At the same time, a fault maintenance signal can be issued in time, and strong sealing, timely maintenance and management can reduce the failure rate of the overall system by a lot compared with the existing failure rate, greatly reduce the impact on the operation of the body, and effectively solve the problems raised in the above-mentioned background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall planar external structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the planar structure of the antenna in the utility model;

[0016] Figure 3 It is a schematic diagram of the planar structure of the cable seat in the utility model.

[0017] In the figure: 1. Radio altimeter system body; 2. Display; 3. Transceiver; 31. Fixing seat; 32. Power socket; 33. Transmitting socket; 34. Receiving socket; 4. Transmitting antenna; 5. Receiving antenna; 6. Antenna body; 61. Mounting screws; 62. Cable holder; 63. Antenna interface; 64. Hard protective cable interface tube; 641. Vacuum chamber; 642. Flexible airtight airbag ring; 643. Vacuum sensor; 644. Exhaust check valve; 645. Intake check valve; 7. Mounting seat; 71. Body fixing assembly; 72. Rubber sealing ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] For examples, see Figure 1-3 The utility model provides a technical solution:

[0023] A radio altimeter system with a low failure rate comprises a radio altimeter system body 1, wherein the radio altimeter system body 1 comprises a display 2, a transceiver 3, a transmitting antenna 4 and a receiving antenna 5.

[0024] Among them, the display 2 and the transceiver 3, the transceiver 3 and the transmitting antenna 4, and the receiving antenna 5 are all electrically connected through cables; the transceiver 3 is fixedly installed with a fixing seat 31 at the four corners, and the transceiver 3 is provided with a power socket 32, a transmitting socket 33 and a receiving socket 34 at one end surface, and the power socket 32 ​​is electrically connected to the fixed power supply of the body, the transmitting socket 33 and the transmitting antenna 4, the receiving socket 34 and the receiving antenna 5, and the display 2 and the transceiver 3 through the cable interface;

[0025] Among them, the transmitting antenna 4 and the receiving antenna 5 both include an antenna body 6 and a mounting seat 7. A cable seat 62 is fixedly installed at the center of one end surface of the antenna body 6 by a mounting screw 61. An antenna interface 63 is arranged at the center of one end surface of the cable seat 62 away from the antenna body 6. A hard protective cable interface tube 64 is fixedly installed around the end surface of the cable seat 62 away from the antenna body 6 and close to the antenna interface 63. A vacuum cavity 641 is opened inside the hard protective cable interface tube 64. A flexible sealed airbag ring 642 is movably installed around a port of the vacuum cavity 641 away from the antenna interface 63. A vacuum sensor 643 is fixedly installed on the inner wall of the vacuum cavity 641. An exhaust check valve 644 and an air intake check valve 645 are fixedly installed on the outer surface of the hard protective cable interface tube 64. The exhaust check valve 644 and the air intake check valve 645 act on the vacuum cavity 641 and the flexible sealed airbag ring 642 respectively. The exhaust check valve 644 and the air intake check valve 645 are respectively connected to the electric suction pump and the electric intake through the air pipe system. The air pump is connected through, and when the antenna interface 63 is sealed, the air intake check valve 645 is opened, and the electric air intake pump is used to inflate the flexible airtight airbag ring 642 through the air pipe, and then the flexible airtight airbag ring 642 tightly wraps the outer surface of the cable plugged into the antenna interface 63 until there is no gap, and then the exhaust check valve 644 is opened, and the vacuum chamber 641 is evacuated by the electric suction pump until it reaches a vacuum state and completes the sealing. At the same time, the vacuum sensor 643 detects the environment inside the vacuum chamber 641 in real time. If an abnormality occurs, the automatic control system continues to seal and vacuumize, and issues a warning, which can effectively prevent the antenna joint from being sealed tightly or the antenna sealing glue from leaking, and moisture from entering the feeder, avoiding certain interference to the difference frequency signal voltage of the antenna line. At the same time, a fault maintenance signal can be issued in time, and strong sealing, timely maintenance and management can reduce the failure rate of the overall system by a lot compared with the existing failure rate, greatly reducing the impact on the operation of the body;

[0026] In addition, in this embodiment, please refer to Figure 2 The outer shell of the antenna body 6 and the mounting seat 7 are integrally formed, and the four corners of the mounting seat 7 are fixedly connected to the fuselage through the fuselage fixing assembly 71. The mounting seat 7 is embedded with a rubber sealing ring 72 near the cable seat 62 on one side of the fuselage. The rubber sealing ring 72 can prevent the water vapor and dirt on the outer surface of the fuselage from penetrating and polluting the cable seat. The external waterproof structure is conducive to the sealing of the antenna interface;

[0027] Working principle: assemble and connect, electrically connect the power socket 32 ​​with the fixed power supply of the body, the transmitting socket 33 and the transmitting antenna 4, the receiving socket 34 and the receiving antenna 5, as well as the display 2 and the transceiver 3 through the cable interface, when sealing the antenna interface 63, the air intake check valve 645 is opened, and the flexible airtight airbag ring 642 is inflated through the air pipe by an electric air intake pump, and then the flexible airtight airbag ring 642 tightly wraps the outer surface of the cable plugged into the antenna interface 63 until there is no gap, and then the exhaust check valve 644 is opened, and the vacuum chamber 641 is evacuated by an electric suction pump until Until a vacuum state is reached and the sealing is completed, the vacuum sensor 643 detects the environment inside the vacuum chamber 641 in real time. If there is any abnormality, the automatic control system continues to seal and vacuumize and issues an alarm. This can effectively prevent water vapor from entering the feeder when the antenna joint is not sealed tightly or the antenna sealing glue leaks, and avoid certain interference to the difference frequency signal voltage of the antenna line. At the same time, a fault maintenance signal can be issued in time. Strong sealing and timely maintenance and management can reduce the failure rate of the overall system by a lot compared with the existing failure rate, greatly reducing the impact on the operation of the machine body, and has certain promotion value.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A radio altimeter system with a low failure rate, comprising a radio altimeter system body (1), characterized in that: The radio altimeter system body (1) comprises a display (2), a transceiver (3), a transmitting antenna (4) and a receiving antenna (5); the transmitting antenna (4) and the receiving antenna (5) both comprise an antenna body (6) and a mounting base (7); a cable seat (62) is fixedly mounted at the center of one end face of the antenna body (6) by means of a mounting screw (61); an antenna interface (63) is arranged at the center of one end face of the cable seat (62) away from the antenna body (6); and the cable seat (62) is close to the end face of the antenna body (6). A hard protective cable interface tube (64) is fixedly installed around the antenna interface (63), a vacuum cavity (641) is provided inside the hard protective cable interface tube (64), a flexible sealed airbag ring (642) is movably installed around a port of the vacuum cavity (641) away from the antenna interface (63), a vacuum sensor (643) is fixedly installed on the inner wall of the vacuum cavity (641), and an exhaust check valve (644) and an intake check valve (645) are fixedly installed on the outer surface of the hard protective cable interface tube (64).

2. A radio altimeter system with a low failure rate according to claim 1, characterized in that: The exhaust check valve (644) and the air intake check valve (645) act on the vacuum chamber (641) and the flexible airtight airbag ring (642) respectively, and the exhaust check valve (644) and the air intake check valve (645) are respectively connected to the electric suction pump and the electric intake pump through the air pipe system.

3. A radio altimeter system with a low failure rate according to claim 1, characterized in that: The outer shell of the antenna body (6) and the mounting seat (7) are integrally formed, the four corners of the mounting seat (7) are fixedly connected to the fuselage through the fuselage fixing components (71), and the mounting seat (7) is embedded with a rubber sealing ring (72) around one side of the fuselage near the cable seat (62).

4. A radio altimeter system with a low failure rate according to claim 1, characterized in that: The display (2) and the transceiver (3), the transceiver (3) and the transmitting antenna (4), and the receiving antenna (5) are all electrically connected via cables.

5. A radio altimeter system with a low failure rate according to claim 4, characterized in that: The transceiver (3) is fixedly mounted with a fixing seat (31) at the four corners, and one end surface of the transceiver (3) is provided with a power socket (32), a transmitting socket (33) and a receiving socket (34).

Images