Laser irradiation test system and test method with airflow simulation function

Abstract

The present invention relates to a laser irradiation test system with a simulated airflow function, wherein a clamping table is used to clamp a target; an airflow module is arranged in the circumferential direction of the clamping table through a bracket; a laser indicating and positioning device is arranged on the airflow module, and the laser direction of the laser indicating and positioning device is consistent with the airflow direction of the airflow module; the center point of the airflow to the target of the airflow module is positioned by the indicating laser of the laser indicating and positioning device on the target; the center point of the laser to the target of the laser irradiation optical path module points to the target; the center point of the airflow to the target of the airflow module coincides with the center point of the laser to the target of the laser radiation optical path module. The airflow to the target of the airflow module is positioned by the laser positioning indicating device, and the angle adjustment between the airflow direction and the laser direction is achieved, simulating the coupling effect of high-speed airflow and laser on the target under real flight conditions. At the same time, the structure is simple and easy to adjust, and the complex real environment where multiple airflows act together can be simulated, and the overall operating energy consumption is low.

Description

Technical Field

[0001] The invention relates to the technical field of laser irradiation testing, and in particular to a laser irradiation testing system and a testing method with a function of simulating airflow. Background Art

[0002] At present, there are three main principles for simulating high-speed airflow in laser irradiation test systems. The first is to directly integrate a high-speed wind tunnel system into the laser irradiation test system. The second is to use laser to irradiate a target that moves at high speed, and use the high-speed relative motion of the target relative to the air to generate simulated airflow. The third is to integrate the air duct and the laser optical fiber on the same axis, so that the laser and airflow always act together in the same direction at the same position of the target.

[0003] Prior art 1: The Chinese invention patent application with publication number CN110736600A discloses a wind tunnel experimental system and test method for strong laser irradiation effects, and the Chinese invention patent application with publication number CN105973563A discloses a test system and method for the combined destructive effects of strong laser and supersonic wind tunnel. This type of technology combines the laser system with the wind tunnel system, and can simulate the laser irradiation test of materials under the condition of high-speed airflow. The limitation of this technology is that the wind tunnel structure is complex and the energy consumption of a single wind tunnel test is high.

[0004] Prior art 2: The Chinese invention patent application with publication number CN108731902A discloses a test system and method for the combined destructive effect of laser and surface airflow. This technology uses a clamping table to rotate the test piece at high speed. The linear speed of the test piece is equal to the speed of its relative motion with the still air, thereby realizing the laser irradiation experiment of the material under the condition of high-speed airflow blowing. The advantage of this technology is that it simplifies the construction of the test system, and no additional gas storage and transmission devices are required to realize the laser irradiation experiment of the material under the condition of high-speed airflow blowing. One of the limitations of this technology is that when the test piece is fixed on the clamping table at any angle, the flow direction of the airflow is determined and cannot be adjusted, and it cannot fully simulate the situation where the material is subjected to airflow from other directions under real service conditions.

[0005] Prior art three: The Chinese invention patent application with publication number CN111122299A discloses a suspended heating device based on hollow-core optical fiber with a laser beam and airflow in the same path. This technology uses hollow-core optical fiber to achieve the same-path output of laser and airflow, and the coaxial design of airflow and laser can ensure that the gas and laser act on the same area. The limitation of this technology is that the airflow direction can only be completely consistent with the laser incident direction, and it cannot simulate the situation that the laser incident direction and the airflow flow direction are at a certain angle, which is more common in real service conditions.

[0006] The use of these three technologies can realize the laser irradiation experiment of materials under the condition of high-speed airflow, and to a certain extent simulate the laser protection ability of aircraft surface materials in the real service environment. However, these three existing technologies have four problems. First, the prior art 1 uses a wind tunnel as the main structure of the equipment, which can simulate the high-speed airflow environment more realistically. However, the wind tunnel has a complex structure, a large volume, and high operating energy consumption, and the target airflow blowing area is much larger than the laser irradiation area, which greatly increases the test cost of the laser irradiation test; second, the laser beam in the prior art 2 is emitted from the center of the clamping table to the test piece. This technology uses the high-speed rotation of the test piece around the center of the clamping table to generate relative motion and interaction with the still air. Therefore, the direction of the high-speed airflow acting on the test piece and the laser incident on the test piece is only determined by the clamping angle of the test piece. The directions of the two cannot be freely adjusted separately, and the airflow and laser acting on or incident on the test piece at any two angles cannot be simulated; third, the prior art 3 uses the cavity of the hollow optical fiber to transmit the high-speed airflow, and uses the hollow optical fiber to conduct the laser to generate a coaxial laser beam and airflow acting on the test piece. The limitation of this technology is that the laser beam and the airflow must be parallel, and the airflow and laser acting on or incident on the test piece at any two angles cannot be simulated; fourth, the prior arts 1, 2, and 3 can only simulate the airflow environment of a single wind direction, and cannot simulate a complex wind field environment in multiple directions. Summary of the invention

[0007] (1) Technical issues to be solved

[0008] The embodiments of the present invention provide a laser irradiation test system and test method with airflow simulation function, which solve the technical problems of the existing laser irradiation test system with complex structure, high operating energy consumption, and unadjustable angle between airflow direction and laser direction.

[0009] (2) Technical solution

[0010] In the first aspect, an embodiment of the present invention proposes a laser irradiation test system with a simulated airflow function, comprising an airflow module, a bracket, a laser pointing and positioning device, a laser irradiation optical path module and a clamping table; the clamping table is used to clamp a target; one or more of the airflow modules are arranged in the circumferential direction of the clamping table through the bracket; the laser pointing and positioning device is arranged on the airflow module, and the laser direction of the laser pointing and positioning device is consistent with the airflow direction of the airflow module; the center point of the airflow to the target of the airflow module is positioned by the pointing laser of the laser pointing and positioning device on the target; the center point of the laser to the target of the laser irradiation optical path module points to the target; the center point of the airflow to the target of the airflow module coincides with the center point of the laser to the target of the laser radiation optical path module.

[0011] Furthermore, the airflow module comprises an air nozzle, an air pipeline and an air source, the air nozzle is arranged on the bracket, and the air outlet of the air nozzle faces the target object, and the air inlet of the air nozzle is connected to the air source through the air pipeline.

[0012] Furthermore, a gas valve is provided on the gas pipeline.

[0013] Furthermore, the gas source includes one or more of air, nitrogen, oxygen, carbon dioxide, argon, and helium.

[0014] Furthermore, the laser pointing and positioning device comprises at least two laser indicator lights, which are evenly spaced and distributed on a circle with the air nozzle as the center, and the irradiation direction of the laser indicator lights is parallel to the airflow direction of the airflow module.

[0015] Furthermore, the laser irradiation optical path module is arranged horizontally, and the center of the laser irradiation optical path module and the center of the clamping platform are located at the same horizontal height.

[0016] Furthermore, the laser irradiation optical path module has a coaxial indicator light.

[0017] Furthermore, the clamping table is rotatable and is equipped with an angle dial or an angle display device.

[0018] Furthermore, the bracket is a circular ring or one or more circular arcs coaxially arranged with the vertical rotation axis of the clamping table, and the surface of the bracket is marked with angle values ​​or is equipped with an angle value display device.

[0019] In a second aspect, a laser irradiation test method with a simulated airflow function is provided, comprising the steps of: clamping a target on a clamping table and recording the rotation angle of the target; turning on the coaxial indicator light of the laser radiation optical path module, clamping the air nozzles of one or more airflow modules on a bracket and aiming at the target; turning on the laser indicator positioning device, adjusting the direction of the air nozzle of the airflow module, so that the geometric center of the laser indicator light to the target spot pattern coincides with the irradiation point of the coaxial indicator light of the laser irradiation optical path module on the target surface; reading and recording the angle of the air nozzle of the airflow module on the bracket; opening the air valve of the airflow module, and turning on the laser radiation optical path module to perform a laser irradiation test.

[0020] (3) Beneficial effects

[0021] In summary, the present invention realizes the target airflow positioning of the airflow module through the laser positioning indication device, realizes the angle adjustment between the airflow direction and the laser direction, simulates the coupling effect of high-speed airflow and laser on the target under real flight conditions, and has a simple structure and is easy to adjust. It can simulate the complex real environment where multiple airflows work together, and the overall operating energy consumption is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. 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 creative work.

[0023] Figure 1 The present invention is a structural schematic diagram of a laser irradiation test system with the function of simulating airflow.

[0024] In the figure: 1. Laser irradiation optical path module; 3. Target; 4. Clamping table; 5. Bracket; 6. Air nozzle; 7. Gas pipeline; 8. Gas valve; 9. Gas source; 10. Laser indication and positioning device; 11. Air flow to target; 12. Laser to target; 13. Indicator laser. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments, and covers any modification, replacement and improvement of parts, components and connection modes without departing from the spirit of the present invention.

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Please refer to Figure 1In the first aspect, an embodiment of the present invention proposes a laser irradiation test system with a simulated airflow function, comprising an airflow module, a bracket 5, a laser pointing and positioning device 10, a laser irradiation optical path module 1 and a clamping table 4; the clamping table 4 is used to clamp a target object 3; one or more of the airflow modules are arranged in the circumferential direction of the clamping table 4 through the bracket 5; the laser pointing and positioning device 10 is arranged on the airflow module, and the laser direction of the laser pointing and positioning device 10 is consistent with the airflow direction of the airflow module; the center point of the target airflow 11 of the airflow module is positioned by the pointing laser 13 of the laser pointing and positioning device 10 on the target object 3; the center point of the target laser 12 of the laser irradiation optical path module 1 points to the target object 3; the center point of the target airflow 11 of the airflow module coincides with the center point of the target laser 12 of the laser radiation optical path module. The airflow module is positioned to the target by means of a laser positioning indicator, and the angle between the airflow direction and the laser direction is adjusted to simulate the coupling effect of high-speed airflow and laser on the target 3 under real flight conditions. The structure is simple and easy to adjust, and the complex real environment where multiple airflows work together can be simulated, with low overall operating energy consumption.

[0028] In some embodiments, the airflow module includes an air nozzle 6, an air pipeline 7, and an air source 9. The air nozzle 6 is disposed on the bracket 5, and the air outlet of the air nozzle 6 faces the target object 3. The air inlet of the air nozzle 6 is connected to the air source 9 through the air pipeline 7. The air nozzle 6 can better control the airflow direction, the air pipeline 7 can be a flexible pipeline, and the air pipelines 7 of one or more airflow modules can be connected to the same air source 9.

[0029] In some embodiments, a gas valve 8 is provided on the gas pipeline 7 to control the gas flow rate or on / off of the gas flow module according to test requirements.

[0030] In some embodiments, the gas source 9 includes one or more of air, nitrogen, oxygen, carbon dioxide, argon, and helium, which can be selected according to experimental requirements.

[0031] In some embodiments, the laser indicating and positioning device 10 includes at least two laser indicator lights, which are evenly spaced on a circle with the air nozzle 6 as the center, and the irradiation direction of the laser indicator lights is parallel to the airflow direction of the airflow module. When determining the center point of the target airflow 11 of the airflow module, the center of the two indicating lasers 13 from the laser indicator lights to the target object 3 is the center point of the target airflow 11 of the airflow module. The number of the laser indicator lights can be 2 to 128, which are evenly spaced and distributed around the circumference of the air nozzle 6. After turning on all or part of the laser indicator lights, the geometric center of the spot pattern of the indicating laser 13 is the center point of the target airflow 11 of the airflow module. The position or direction of the air nozzle 6 is adjusted so that the spot center of the indicating laser 13 coincides with the irradiation point of the laser irradiation optical path module 1 on the surface of the target object 3, so that the airflow and the action site of the laser on the target object 3 coincide.

[0032] In some embodiments, the laser irradiation optical path module 1 is horizontally arranged, and the center of the laser irradiation optical path module 1 and the center of the clamping table 4 are at the same horizontal height, which can ensure that the laser of the laser irradiation optical path module 1 horizontally impinges on the center of the clamping table 4 and irradiates on the target object 3.

[0033] In some embodiments, the laser irradiation optical path module 1 has a coaxial indicator light, and the coaxial indicator light is visible light, which is convenient for observing the position and facilitating the adjustment of the airflow module.

[0034] In some embodiments, the clamping platform 4 is rotatable and is equipped with an angle dial or an angle display device. The clamping platform 4 allows the target 3 to rotate 0° to 360° around one or two mutually perpendicular and intersecting rotation axes of the clamping platform 4. The clamping platform 4 can be adjusted according to test needs to switch the target 3 to different working conditions.

[0035] In some embodiments, the support 5 is a ring or one or more arcs coaxially arranged with the vertical rotation axis of the clamping platform 4, and the surface of the support 5 is marked with angle values ​​or equipped with an angle value display device. The support 5 makes the distance from the airflow module to the clamping platform 4 equal, thereby improving the accuracy of the test results.

[0036] In a second aspect, a laser irradiation test method with a simulated airflow function is provided, comprising the steps of:

[0037] Clamp the target 3 on the clamping table 4, and record the rotation angle of the target 3;

[0038] Turn on the coaxial indicator light of the laser radiation optical path module, clamp the air nozzle 6 of one or more air flow modules on the bracket 5 and aim at the target object 3;

[0039] Turn on the laser pointing and positioning device 10, and adjust the direction of the air nozzle 6 of the airflow module so that the geometric center of the laser indicator light to the target spot pattern coincides with the irradiation point of the coaxial indicator light of the laser irradiation optical path module 1 on the surface of the target object 3;

[0040] Read and record the angle of the air nozzle 6 of the airflow module on the bracket 5;

[0041] Open the air valve 8 of the air flow module, and turn on the laser radiation optical path module to carry out the laser irradiation test.

[0042] Embodiment 1:

[0043] Clamp the target 3 on the clamping table 4, rotate the clamping table 4 to adjust the angle of the target 3, and record the rotation angle of the target 3 as 0° horizontal deflection and 15° forward deflection; turn on the coaxial indicator light of the laser radiation optical path module, clamp the one air nozzle 6 required for the test on the ring of the bracket 5 to aim at the target 3, and turn on the laser indication positioning device 10 on the periphery of all the air nozzles 6 required for the test, so that the geometric center of the target spot pattern of the two laser indicator lights of the one air nozzle 6 required for the test coincides with the irradiation point of the laser irradiation optical path module 1 on the surface of the target 3, and record the one airflow required for the test by reading the angle degree of the bracket 5 The angle between the direction and the incident direction of laser irradiation is 175°; open the air valve 8 to start the airflow, use the wind speed sensor to measure the wind speed at the irradiation point on the surface of the target 3, adjust the air pressure of the air source 9 and the air valve 8 to make the wind speed meet the test requirements, record the wind speed as 15m / s after the wind speed stabilizes, and remove the wind speed sensor; start the monitoring module and set the laser generator parameters, turn on the test laser and conduct the laser irradiation test, turn off the laser after the irradiation test is completed, and record the monitoring results of the time; if it is necessary to continue other high-speed airflow coupled laser irradiation tests, replace the target 3 or change the clamping position of the original target 3, and repeat the above steps to conduct subsequent irradiation tests.

[0044] Embodiment 2:

[0045] Clamp the target 3 on the clamping table 4, rotate the clamping table 4 to adjust the angle of the target 3, and record the rotation angle of the target 3 as 60° for horizontal deflection and 0° for forward deflection; turn on the coaxial indicator light of the laser radiation optical path module, clamp the 10 air nozzles 6 required for the test on the ring of the bracket 5 to aim at the target 3, and turn on and adjust the laser indication positioning devices 10 on the periphery of the 10 air nozzles 6 required for the test one by one in sequence, so that the geometric center of the 128 laser indicator lights of each air nozzle 6 required for the test to the target spot pattern coincides with the irradiation point of the laser irradiation optical path module 1 on the surface of the target 3, and record the angles of the 10 airflow directions required for the test and the incident direction of the laser irradiation by reading the angle degree of the surface of the ring of the bracket 5 or the angle value display device, which are -10°, -5°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, and 40° respectively; open the air valve 8 of one group of air jet devices to open 1 group of airflow, use the wind speed sensor to measure the wind speed at the irradiation point on the surface of the target object 3, adjust the air pressure of the air source 9 and the air valve 8 to make the wind speed meet the test requirements, record the wind speed after the wind speed is stable, close the air valve 8 of this group, repeat the measurement of the target wind speed of other groups of jet devices in this way, and all the wind speed measurement results are 15m / s, 15m / s, 30m / s, 30m / s, 30m / s, 15m / s, 15m / s, 20m / s, 15m / s, 30m / s, after the wind speed data is recorded, open the air valve 8 of all 10 groups of jet devices required for the experiment and remove the wind speed sensor; after starting the monitoring module, set the laser generator parameters, turn on the test laser and carry out the laser irradiation test, turn off the laser after the irradiation test is completed, and record the monitoring results of the time; if it is necessary to continue other high-speed airflow coupled laser irradiation tests, replace the target object 3 or change the clamping position of the original target object 3, repeat the above steps to carry out subsequent irradiation tests.

[0046] The embodiment of the present invention provides a laser irradiation test system with a simulated airflow function. It can be used alone or in combination with other systems, such as a heating system and a cooling system. Similarly, the placement of the annular portion of the bracket 5 is not limited to horizontal placement, but can also be placed vertically; the annular portion of the bracket 5 is not limited to a complete circle, but can also be a part or several parts of a circle, that is, one or several arc segments. The laser indicator light in the laser positioning indication device is not limited to being fully turned on, but can also be turned on only a part of it. Such changes all fall within the protection scope of the present invention.

[0047] It should be clear that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. In addition, for the sake of brevity, a detailed description of known methods and technologies is omitted here.

[0048] The above is only an embodiment of the present application and is not limited to the present application. For those skilled in the art, the present application may have various changes and variations without departing from the scope of the present invention. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A laser irradiation test system with airflow simulation function, characterized in that: It includes an airflow module, a bracket, a laser indication and positioning device, a laser irradiation optical path module and a clamping table; The clamping platform is used to clamp the target; One or more airflow modules are arranged in the circumferential direction of the clamping table through the bracket; The laser pointing and positioning device is arranged on the airflow module, and the laser direction of the laser pointing and positioning device is consistent with the airflow direction of the airflow module; The center point of the airflow to the target of the airflow module is positioned by the indicating laser of the laser indicating and positioning device on the target object; The center point of the target laser of the laser irradiation optical path module points to the target object; The center point of the airflow to the target of the airflow module coincides with the center point of the laser to the target of the laser radiation optical path module.

2. The laser irradiation test system with airflow simulation function according to claim 1, characterized in that: The airflow module comprises an air nozzle, an air pipeline and an air source. The air nozzle is arranged on the bracket, and the air outlet of the air nozzle faces the target object. The air inlet of the air nozzle is connected to the air source through the air pipeline.

3. The laser irradiation test system with airflow simulation function according to claim 2, characterized in that: The gas pipeline is provided with a gas valve.

4. The laser irradiation test system with airflow simulation function according to claim 2, characterized in that: The gas source includes one or more of air, nitrogen, oxygen, carbon dioxide, argon, and helium.

5. The laser irradiation test system with airflow simulation function according to claim 2, characterized in that: The laser pointing and positioning device comprises at least two laser indicator lights, which are evenly spaced and distributed on a circle with the air nozzle as the center, and the irradiation direction of the laser indicator lights is parallel to the airflow direction of the airflow module.

6. The laser irradiation test system with airflow simulation function according to claim 1, characterized in that: The laser irradiation optical path module is arranged horizontally, and the center of the laser irradiation optical path module and the center of the clamping platform are located at the same horizontal height.

7. The laser irradiation test system with airflow simulation function according to claim 1, characterized in that: The laser irradiation optical path module has a coaxial indicator light.

8. The laser irradiation test system with airflow simulation function according to claim 1, characterized in that: The clamping table is rotatable and is equipped with an angle dial or an angle display device.

9. The laser irradiation test system with airflow simulation function according to claim 1, characterized in that: The support is a circular ring or one or more circular arcs coaxially arranged with the vertical rotation axis of the clamping platform, and the surface of the support is marked with angle values ​​or is equipped with an angle value display device.

10. A laser irradiation test method with airflow simulation function, characterized in that: A laser irradiation test system with airflow simulation function as claimed in any one of claims 1 to 9 is used, comprising the steps of: Clamp the target on the clamping table and record the rotation angle of the target; Turn on the coaxial indicator light of the laser radiation optical path module, clamp the air nozzles of one or more air flow modules on the bracket and aim at the target; Turn on the laser indication and positioning device, and adjust the direction of the air nozzle of the airflow module so that the geometric center of the laser indicator light to the target spot pattern coincides with the irradiation point of the coaxial indication light of the laser irradiation optical path module on the target surface; Read and record the angle of the air nozzle of the airflow module on the bracket; Open the air valve of the air flow module and turn on the laser radiation optical path module to carry out the laser irradiation test.

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