CN108181321B

CN108181321B - System for simultaneously carrying out laser speckle nondestructive testing on multiple shipboard aircraft tires

Info

Publication number: CN108181321B
Application number: CN201711476070.4A
Authority: CN
Inventors: 李梓萁
Original assignee: Hangzhou Qingben Technology Co ltd
Current assignee: Hangzhou Qingben Technology Co ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2021-03-02
Anticipated expiration: 2037-12-29
Also published as: CN108181321A

Abstract

The invention provides a system for simultaneously carrying out laser speckle nondestructive testing on a plurality of shipboard aircraft tires, wherein the system comprises: a rotating column disposed at a central axis of the plurality of tires arranged coaxially; the stepping motor is connected with the rotating column and is used for driving the rotating column to rotate; the fixed column is arranged in parallel with the rotating column; the lasers corresponding to the tires are fixed on the fixing columns and used for irradiating the tires; the CCD cameras corresponding to the laser are fixed on the fixed columns and used for collecting reflection images when the laser irradiates the tire; a plurality of valves corresponding to the tires for controlling air pressure of the tires; and the controller is connected with the stepping motor and the valve and is used for controlling the rotation of the stepping motor and the air pressure of the tire. The invention can detect the defects of the shipboard aircraft tire in parallel, and is accurate and efficient.

Description

System for simultaneously carrying out laser speckle nondestructive testing on multiple shipboard aircraft tires

Technical Field

The invention relates to the technical field of nondestructive testing, in particular to a nondestructive testing device for aircraft tires, and specifically relates to a system for simultaneously carrying out laser speckle nondestructive testing on a plurality of shipboard aircraft tires.

Background

The tire is an important component of the carrier-based aircraft, and mainly has the functions of supporting the weight of the carrier-based aircraft, buffering the impact on the carrier-based aircraft in the taking-off and arresting processes, helping to absorb the impact energy, providing enough friction force during arresting so that the carrier-based aircraft can be stopped in time after landing on a deck, and the like. Although the tire has extremely short service time in the whole operation process of the carrier-based aircraft, the tire is just the two most difficult phases with the highest problem occurrence rate in flight, namely taking off and arresting landing. In addition to the tasks of rolling, steering, bearing, braking and shock absorption of a common aircraft, the shipboard aircraft tire needs to deal with the special take-off and landing states (such as high speed, high pressure, high overload, high friction, high temperature, strong corrosion and the like) of launching and blocking on a ship in the use process. Because safety accidents caused by tires occur frequently, light persons cause the shipboard aircraft to deviate from the center of a runway to damage the shipboard aircraft, heavy persons rush out of the surface of the runway and cause flight accidents, practice proves that the defective tires are important factors influencing the reliability and safety of the shipboard aircraft, therefore, the accurate detection of the defects of the shipboard aircraft tires is important guarantee for ensuring safe takeoff and arresting of the shipboard aircraft, and the conventional nondestructive detection technology of the shipboard aircraft tires mainly comprises a laser holographic tire nondestructive detection technology and a laser speckle tire nondestructive detection technology.

The laser holographic tire nondestructive testing technology is a technical means applied to testing the internal quality of a tire in the last 90 th century, and the internal defects (such as delamination, bubbles and the like) of the tire are tested by applying a coherent laser, applying a holographic interference principle and carrying out vacuum loading double exposure means on the internal surface of the tire. Due to the nature of the holographic interference technique itself, first, the laser source is required to be excellent in coherence: secondly, a large shockproof platform is required to be established: thirdly, because the holographic dry plate is used as a recording medium, exposure loading, taking, processing the dry plate and reproducing an interference image are required to be carried out in a darkroom environment. Therefore, the existing laser holographic tire nondestructive testing technology is high in cost and low in testing efficiency, and a huge anti-shock platform is built on an aircraft-carrying ship instead of a Tianfang night pit according to the environment which cannot adapt to repeated take-off and landing of the aircraft on the aircraft-carrying ship.

The laser speckle tire nondestructive detection technology is also called as speckle shearing interferometry, laser emitted by a laser generator irradiates the surface of a tire to generate coherent fringes of an interference speckle field, the tire is deflated temporarily through an inflation and deflation system, and if the inside of the tire has defects, the defect part can deform differently from other parts after deflation. However, the laser speckle tire nondestructive testing technology is greatly influenced by the inflation pressure of the tire, the deflation time and the defect detection position (the detection effect of the sidewall is obviously better than that of the tread), has low detection precision, cannot meet the requirements of a carrier-based aircraft, can be inflated and deflated only when the tire is in an application state, and has low detection efficiency.

Therefore, a need exists in the art for developing a non-destructive testing method for a tire of a carrier-based aircraft with high testing accuracy and high testing efficiency, so as to effectively guarantee the safety of the carrier-based aircraft in the taking-off and arresting processes.

Disclosure of Invention

In view of this, the technical problem to be solved by the present invention is to provide a system for simultaneously performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires, so as to solve the problems of low precision and low efficiency of the existing shipboard aircraft tire nondestructive testing technology.

In order to solve the above technical problems, a specific embodiment of the present invention provides a system for simultaneously performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires, including: a rotating column disposed at a central axis of the plurality of tires arranged coaxially; the stepping motor is connected with the rotating column and is used for driving the rotating column to rotate; the fixed column is arranged in parallel with the rotating column; the lasers corresponding to the tires are fixed on the fixing columns and used for irradiating the tires; the CCD cameras corresponding to the laser are fixed on the fixed columns and used for collecting reflection images when the laser irradiates the tire; a plurality of valves corresponding to the tires for controlling air pressure of the tires; and the controller is connected with the stepping motor and the valve and is used for controlling the rotation of the stepping motor and the air pressure of the tire.

According to the above embodiments of the present invention, the system for simultaneously performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires has at least the following beneficial effects: the device comprises a plurality of shipboard aircraft tires, a controller, a stepping motor, a rotating column, a plurality of CCD cameras and a plurality of lasers, wherein the plurality of shipboard aircraft tires are fixed on the vertical rotating column, the controller controls the stepping motor to rotate, the rotating column is driven by the stepping motor to rotate, the rotating column further drives the shipboard aircraft tires to rotate on a horizontal plane, the plurality of shipboard aircraft tires are detected simultaneously by the plurality of CCD cameras and the plurality of lasers, one CCD camera and one laser correspond to one shipboard aircraft tire, one CCD camera acquires an image reflected by one shipboard aircraft tire irradiated by one laser, and the plurality of CCD cameras and the plurality of lasers are fixed on a column body parallel to the rotating column. Under a plurality of different air pressures of the tire, the rotating shaft is driven by the stepping motor to rotate 360 degrees respectively, namely, the tire is subjected to primary reflection image acquisition under each air pressure, reflection images acquired by the CCD camera are transmitted to the processor in real time to be processed, the processor detects defect parts by comparing reflection images under different air pressures of the same tire, and the defect parts are displayed on the display, so that the parallel detection of a plurality of shipboard aircraft tires is realized, the air valve deflation and the stepping motor operation are finished under the control of the controller, the defects of the shipboard aircraft tires can be accurately and efficiently detected, the safety of the take-off and arresting process of the shipboard aircraft is effectively guaranteed, the structure is simple, the occupied space is small, and the cost is low.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a first embodiment of a system for performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires simultaneously according to a specific embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a second embodiment of a system for performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires simultaneously according to a specific embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a third embodiment of a system for performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires simultaneously according to a specific embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a first embodiment of a spin column according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a second embodiment of a spin column according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a fixing post according to an embodiment of the present invention.

Description of reference numerals:

1 rotating column 2 stepping motor

3 fixed column 4 laser

6 valves of 5 CCD camera

7 controller 8 processor

9 display 10 scattering disk

11 hole 12 stop rod

T-tyre 31 height adjusting ring

Detailed Description

For the purpose of promoting a clear understanding of the objects, aspects and advantages of the embodiments of the invention, reference will now be made to the drawings and detailed description, wherein there are shown in the drawings and described in detail, various modifications of the embodiments described herein, and other embodiments of the invention will be apparent to those skilled in the art.

The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.

As used herein, the terms "first," "second," …, etc., do not denote any order or sequence, nor are they used to limit the present invention, but rather are used to distinguish one element from another or from another element or operation described in the same technical language.

With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

As used herein, "and/or" includes any and all combinations of the described items.

References to "plurality" herein include "two" and "more than two"; reference to "multiple sets" herein includes "two sets" and "more than two sets".

As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. Generally, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.

Certain words used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.

Fig. 1 is a schematic structural diagram of a first embodiment of a system for performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires simultaneously according to a specific embodiment of the present invention, as shown in fig. 1, a plurality of tires are sleeved on a rotating column, a stepping motor drives the rotating column to rotate, and the rotating column drives the tires to rotate; the fixed column and the rotating column are arranged in parallel, the laser fixed on the fixed column irradiates the corresponding tire, and a Charge Coupled Device (CCD) camera fixed on the fixed column collects the reflection image of the tire; the air valve releases or increases the air pressure of the tire under the control of the controller, so that the CCD camera can acquire the reflection images of the tire under different air pressures.

In the specific embodiment shown in the drawing, the system for simultaneously carrying out laser speckle nondestructive detection on a plurality of shipboard aircraft tires comprises: the device comprises a rotary column 1, a stepping motor 2, a fixed column 3, a plurality of lasers 4, a plurality of CCD cameras 5, a plurality of air valves 6 and a controller 7. Wherein, the rotary column 1 is arranged at the central shaft of a plurality of tires T which are coaxially arranged; the stepping motor 2 is connected with the rotating column 1, and the stepping motor 2 is used for driving the rotating column 1 to rotate; the fixed column 3 is arranged in parallel with the rotating column 1; the laser 4 corresponds to the tire T, the laser 4 is fixed on the fixing column 3, and the laser 4 is used for irradiating the tire T; the CCD camera 5 corresponds to the laser 3, the CCD camera 5 is fixed on the fixed column 3, and the CCD camera 5 is used for collecting a reflection image when the laser 4 irradiates the tire T; the valve 6 corresponds to the tire T, and the valve 6 is used for controlling the air pressure of the tire T; the controller 7 is respectively connected with the stepping motor 2 and the valve 6, and the controller 7 is used for controlling the rotation of the stepping motor 2 and the air pressure of the tire T. In a specific embodiment of the present invention, the laser 4 may be a He-Ne laser; the air pressure value of the tire T can be 0.4Mpa, 0.45Mpa, 0.5Mpa, 0.55Mpa, 0.6Mpa and 0.65 Mpa; the deflation time of the valve 6 when adjusting the air pressure of the tire T may be 0.3s, 0.5s and 0.7 s.

Referring to fig. 1, a plurality of lasers 4 simultaneously irradiate a plurality of tires T (one laser corresponds to each tire) sleeved on a rotating column 1, a CCD camera 5 collects a reflected image of one tire T, the rotating column 1 is driven by a stepping motor 2 to rotate, so that the lasers 4 irradiate one circle of the tire, the CCD camera 5 collects one circle of the tire T, and the tire T is comprehensively detected; the valve 6 can perform laser speckle nondestructive detection on a plurality of shipboard aircraft tires simultaneously under the control of the controller 7, or fully or deflate the tires T, and can accurately and efficiently detect the defects of the shipboard aircraft tires, so that the safety of the take-off and arresting processes of the shipboard aircraft is effectively guaranteed, the structure is simple, the occupied space is small, and the cost is low.

Fig. 2 is a schematic structural diagram of a second embodiment of a system for performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires simultaneously according to an embodiment of the present invention, and as shown in fig. 2, a processor analyzes reflection images of the tires at different air pressures to determine the positions of defects of the tires; the display displays the defect position of the tire, so that the inspector can observe the tire conveniently.

In the embodiment shown in the figure, the system for simultaneously performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires further comprises a processor 8 and a display 9. Wherein, the processor 8 is connected with the CCD camera 5, and the processor 8 is used for analyzing the reflection images of the tire T under different air pressures so as to determine the defect position of the tire T; a display 9 is connected to the processor 8, the display 9 being adapted to display the location of the defect in the tire T. In an embodiment of the present invention, the processor 8 may be an image processor GPU; the display 9 may be a three-dimensional display.

Referring to fig. 2, the processor 8 analyzes the reflected image, and can determine the defect position of the tire T, so that the tire T can be conveniently maintained by the detector, and the processing efficiency is high; the display 9 displays the defect position of the tire, so that the detection personnel can observe conveniently, and errors possibly generated by artificial observation are avoided.

Fig. 3 is a schematic structural diagram of a third embodiment of a system for performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires simultaneously according to an embodiment of the present invention, and as shown in fig. 3, a diffuser uniformly projects light emitted by a laser onto a tire, so that the testing precision is high.

In the embodiment shown in the figure, the system for simultaneously performing laser speckle nondestructive testing on a plurality of shipboard tires further comprises a plurality of scatterers 10. Wherein the scatterer 10 corresponds to the laser 4, the scatterer 10 is correspondingly disposed on the optical path of the laser 4, and the scatterer 10 is used for uniformly irradiating the emitted light of the laser 4 on the tire T. In an embodiment of the present invention, the diffuser 10 may be a convex lens.

Referring to fig. 3, the scatterer 10 uniformly irradiates the emitted light of the laser 4 onto the tire T, so that erroneous judgment due to uneven illumination does not occur, and the detection accuracy is high.

Fig. 4 is a schematic structural diagram of a first example of a rotary column according to an embodiment of the present invention, and fig. 5 is a schematic structural diagram of a second example of a rotary column according to an embodiment of the present invention, as shown in fig. 4 and 5, the rotary column 1 has a plurality of holes 11 and a plurality of stop rods 12, and the stop rods 12 are inserted into the holes 11 to define the height of the tire T. Wherein, hole 11 can be the screw, backstop pole 12 can be the screw rod, with on the screw rod installation screw, tire T cover is on column spinner 1, and the tire T is being supported to the screw rod to accomplish the high injecing of tire T, thereby can realize detecting when a plurality of tire T.

Fig. 6 is a schematic structural view of a fixing column according to an embodiment of the present invention, and as shown in fig. 6, the fixing column 3 has a plurality of height adjusting rings 31 connected to the controller 7. The laser device 4 and the CCD camera 5 are fixed on the height adjusting ring 31, namely, the height adjusting ring 31 can be adjusted according to the height of the tire T, so that the laser device 4 and the CCD camera 5 correspond to the tire T positively, the appearance of the tire T is accurately acquired, the precision is high, and the requirement of ship-borne tire nondestructive testing is met.

The specific embodiment of the invention provides a system for simultaneously carrying out laser speckle nondestructive detection on a plurality of shipboard aircraft tires, wherein the shipboard aircraft tires are fixed on a vertical rotary column, a controller controls a stepping motor to rotate, the rotary column is driven by the stepping motor to rotate, the rotary column further drives the shipboard aircraft tires to rotate on a horizontal plane, and a plurality of CCD cameras and a plurality of lasers are used for simultaneously detecting the plurality of shipboard aircraft tires, wherein one CCD camera and one laser correspond to one shipboard aircraft tire, one CCD camera acquires an image reflected by one shipboard aircraft tire irradiated by one laser, and the plurality of CCD cameras and the plurality of lasers are fixed on a column body parallel to the rotary column; under a plurality of different air pressures of the tire, the rotating shaft is driven by the stepping motor to rotate 360 degrees respectively, namely, the tire is subjected to primary reflection image acquisition under each air pressure, reflection images acquired by the CCD camera are transmitted to the processor in real time to be processed, the processor detects defect parts by comparing reflection images under different air pressures of the same tire, and the defect parts are displayed on the display, so that the parallel detection of a plurality of shipboard aircraft tires is realized, the air valve deflation and the stepping motor operation are finished under the control of the controller, the defects of the shipboard aircraft tires can be accurately and efficiently detected, the safety of the take-off and arresting process of the shipboard aircraft is effectively guaranteed, the structure is simple, the occupied space is small, and the cost is low.

The embodiments of the invention described above may be implemented in various hardware, software code, or combinations of both. For example, an embodiment of the present invention may also be program code for executing the above method in a Digital Signal Processor (DSP). The invention may also relate to a variety of functions performed by a computer processor, digital signal processor, microprocessor, or Field Programmable Gate Array (FPGA). The processor described above may be configured according to the present invention to perform certain tasks by executing machine-readable software code or firmware code that defines certain methods disclosed herein. Software code or firmware code may be developed in different programming languages and in different formats or forms. Software code may also be compiled for different target platforms. However, the different code styles, types, and languages of software code and other types of configuration code that perform tasks in accordance with the present invention do not depart from the spirit and scope of the present invention.

The foregoing is merely an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.

Claims

1. A system for simultaneously carrying out laser speckle nondestructive testing on a plurality of shipboard aircraft tires is characterized by comprising:

the rotating column (1) is arranged at the central shaft of a plurality of tires (T) which are coaxially arranged, the rotating column (1) is provided with a plurality of holes (11) and a plurality of stop rods (12), and the stop rods (12) are inserted into the holes (11) to define the height of the tires (T);

the stepping motor (2) is connected with the rotating column (1) and is used for driving the rotating column (1) to rotate;

a fixed column (3) arranged in parallel with the rotating column (1);

a plurality of lasers (4) corresponding to the tyre (T), fixed on the fixed column (3), for irradiating the tyre (T);

the CCD cameras (5) corresponding to the laser (4) are fixed on the fixed column (3) and are used for collecting reflection images when the laser (4) irradiates the tire (T);

a plurality of valves (6) corresponding to said tyres (T) for controlling the air pressure of said tyres (T); and

and the controller (7) is connected with the stepping motor (2) and the air valve (6) and is used for controlling the rotation of the stepping motor (2) and the air pressure of the tire (T).

2. The system for performing simultaneous laser speckle nondestructive testing of a plurality of shipboard aircraft tires according to claim 1, further comprising:

a processor (8) connected to the CCD camera (5) for analyzing the reflection images of the tire (T) at different air pressures, thereby determining the defect position of the tire (T).

3. The system for performing simultaneous laser speckle nondestructive testing of a plurality of shipboard aircraft tires according to claim 2, wherein the system further comprises:

a display (9) connected to the processor (8) for displaying the location of the defect of the tyre (T).

4. The system for performing simultaneous laser speckle nondestructive testing of a plurality of shipboard aircraft tires according to claim 2, wherein the system further comprises:

a plurality of scatterers (10) corresponding to the laser (4) are provided in correspondence with the optical path of the laser (4) for uniformly irradiating the emitted light of the laser (4) on the tire (T).

5. The system for simultaneous laser speckle nondestructive inspection of a plurality of shipboard aircraft tires according to claim 1, wherein the laser (4) is a He-Ne laser.

6. The system for simultaneously performing laser speckle nondestructive testing on a plurality of shipboard aircraft tires according to claim 5, wherein the hole (11) is a screw hole, and the stop rod (12) is a screw rod.

7. The system for the simultaneous laser speckle nondestructive testing of a plurality of shipboard aircraft tires according to claim 1, characterized in that the fixed column (3) has a plurality of height adjustment rings (31) connected to the controller (7).

8. The system for the simultaneous laser speckle nondestructive inspection of a plurality of shipboard aircraft tires according to claim 7, characterized in that the laser (4) and the CCD camera (5) are fixed on the height adjusting ring (31).

9. The system for the simultaneous laser speckle nondestructive testing of a plurality of shipboard aircraft tires according to claim 1, wherein the tire (T) has air pressure values of 0.4Mpa, 0.45Mpa, 0.5Mpa, 0.55Mpa, 0.6Mpa, and 0.65Mpa, respectively; the deflation time of the valve (6) when adjusting the air pressure of the tyre (T) is 0.3s, 0.5s and 0.7 s.