High-energy laser damaged material surface temperature monitoring system and method

Abstract

The invention provides a high-energy laser damaged material surface temperature monitoring system and method.The high-energy laser damaged material surface temperature monitoring system comprises a high-energy laser light source, a homogenizing optical fiber beam expanding system, a material sample fixing system and a material surface temperature monitoring system, and laser generated by the high-energy laser light source is output after being homogenized and expanded by the homogenizing optical fiber beam expanding system; the output homogenized high-energy laser acts on an irradiation target material sample after beam expansion, the material surface temperature monitoring system comprises a high-precision target acquisition system, a binocular vision imaging system and a multispectral wavelength temperature measurement system, and the target acquisition system is used for acquiring infrared heat radiation on the surface of a laser irradiation material; the binocular vision imaging system is used for realizing three-dimensional thermal imaging of the laser irradiation target material sample piece according to the collected infrared thermal radiation, and the multispectral wavelength temperature measurement system is used for realizing three-dimensional temperature measurement of the laser irradiation target material sample piece according to the three-dimensional thermal imaging. By applying the technical scheme of the invention, the technical problem that three-dimensional temperature monitoring is difficult to realize in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical testing, in particular to a high-energy laser damage material surface temperature monitoring system and method. BACKGROUND

[0002] The main reason for high-energy laser damage is the thermal and mechanical reactions of the internal structure of the target material when the laser irradiation is on the target material. There are many factors that affect the damage effect of the laser on the target material. On the one hand, it is related to the parameters of the irradiated laser, such as wavelength, power density, action time, pulse width, time and space distribution, etc. On the other hand, it is related to the parameters of the material itself, such as specific heat capacity, thermal conductivity, density, elastic modulus and tensile strength, etc. Moreover, these parameters are interrelated, and the change of one parameter will cause the change of other parameters, forming a complex nonlinear relationship. At present, with the continuous progress of high-energy laser technology, the indicators of high-energy laser are continuously improved, and various new anti-damage materials are continuously emerging, and it is urgent to evaluate the damage effect of laser on different materials.

[0003] The damage condition of the target material under high-energy laser irradiation is determined by the temperature distribution of the target material, so in order to realize the evaluation of the damage effect of high-energy laser on the target material, it is necessary to monitor the three-dimensional temperature field of the target material irradiated by the laser in real time. The traditional surface temperature monitoring is carried out by a thermal imager, which is a two-dimensional temperature measurement device and is difficult to realize three-dimensional temperature monitoring. SUMMARY

[0004] The present application provides a high-energy laser damage material surface temperature monitoring system and method, which can solve the technical problem of difficult three-dimensional temperature monitoring in the prior art.

[0005] According to one aspect of the present application, a high-energy laser damage material surface temperature monitoring system is provided, which comprises a high-energy laser light source, a homogenization fiber beam expansion system, a material sample fixing system and a material surface temperature monitoring system. The high-energy laser light source generates laser light which is output after being homogenized and expanded by the homogenization fiber beam expansion system. The output homogenized high-energy laser is applied to the irradiation target material sample after expansion. The material sample fixing system is used to fix the irradiation target material sample. The material surface temperature monitoring system comprises a high-precision target acquisition system, a binocular vision imaging system and a multi-spectral wavelength temperature measurement system. The high-precision target acquisition system is used to acquire the infrared thermal radiation of the laser irradiated material surface. The binocular vision imaging system is used to realize three-dimensional thermal imaging of the laser irradiated target material sample according to the acquired infrared thermal radiation. The multi-spectral wavelength temperature measurement system is used to realize three-dimensional temperature measurement of the laser irradiated target material sample according to the three-dimensional thermal imaging.

[0006] Furthermore, the homogenizing fiber beam expanding system includes a homogenizing fiber, a fiber connector, a beam expanding lens group, and a cooling circulation system. The homogenizing fiber is used to homogenize the spot distribution of the output laser. The fiber connector connects the homogenizing fiber to the beam expanding lens group. The beam expanding lens group is used to homogenize and expand the output laser from the homogenizing fiber. The cooling circulation system is connected to both the homogenizing fiber and the beam expanding lens group. The heat generated by the homogenizing fiber beam expanding system during operation is dissipated by the cooling circulation system.

[0007] Furthermore, the high-energy laser source is an all-fiber laser.

[0008] According to another aspect of the present invention, a method for monitoring the surface temperature of a material damaged by a high-energy laser is provided, wherein the method uses the high-energy laser damaged material surface temperature monitoring system described above to monitor the surface temperature of the material damaged by the high-energy laser.

[0009] Furthermore, the method for monitoring the surface temperature of materials damaged by high-energy lasers includes: a high-energy laser source generating laser light; a homogenizing fiber homogenizing the spot distribution of the output laser light; a fiber optic connector connecting the homogenizing fiber and a beam-expanding lens group; the beam-expanding lens group homogenizing and expanding the output laser light from the homogenizing fiber; heat generated by the homogenizing fiber beam-expanding system during operation being dissipated by a cooling circulation system; the output homogenized high-energy laser, after beam expansion, acting on the irradiated target material sample; a high-precision target acquisition system composed of an infrared optical lens group and a medium-density filter, acquiring the infrared thermal radiation from the surface of the laser-irradiated material; based on the acquired infrared thermal radiation, a binocular vision imaging system realizing three-dimensional thermal imaging of the laser-irradiated material; and based on the three-dimensional thermal imaging, a multispectral wavelength temperature measurement system realizing three-dimensional temperature measurement of the laser-irradiated material, wherein the multispectral wavelength temperature measurement system is composed of a multicolor filter and a multi-channel focal plane detector, possessing high-precision wavelength selection and range switching capabilities.

[0010] This invention provides a high-energy laser-damaged material surface temperature monitoring system. This system combines binocular vision thermometry with a high-energy laser-damaged target system, integrating a high-energy laser source, a homogenizing fiber beam expander, a material sample fixation system, and a material surface temperature monitoring system. This allows for real-time and accurate measurement of the three-dimensional temperature of the target material under irradiation, meeting the requirements for three-dimensional temperature measurement of laser-irradiated targets. Therefore, compared with existing technologies, the high-energy laser-damaged material surface temperature monitoring system provided by this invention can achieve real-time and accurate measurement of the three-dimensional temperature of the target material under high-energy laser irradiation, effectively solving the technical problem of difficulty in achieving three-dimensional temperature monitoring in existing technologies. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is readily understood that the drawings are merely illustrative of some embodiments of the application and therefore are not to be construed as limiting the scope of the application as described herein.

[0012] Figure 1 A structural schematic diagram of a high-energy laser material surface temperature monitoring system provided by a specific embodiment of the application is shown.

[0013] Figure 2 A structural schematic diagram of a material surface temperature monitoring system provided by a specific embodiment of the application is shown.

[0014] In the above drawings, the following reference signs are included:

[0015] 10, high-energy laser; 20, homogenization optical fiber beam expansion system; 21, homogenization optical fiber; 22, beam expansion lens group; 23, cooling circulation system; 30, material surface temperature monitoring system; 31, high-precision target acquisition system; 32, binocular vision imaging system; 33, multi-spectral wavelength temperature measurement system; 40, laser irradiation material. DETAILED DESCRIPTION

[0016] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the application of the present application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0017] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0018] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0019] like Figure 1 As shown in the figure, a high-energy laser-damaged material surface temperature monitoring system according to a specific embodiment of the present invention is characterized in that the high-energy laser-damaged material surface temperature monitoring system includes a high-energy laser source 10, a homogenizing fiber beam expanding system 20, a material sample fixing system, and a material surface temperature monitoring system 30. The high-energy laser source generates laser light, which is homogenized and expanded by the homogenizing fiber beam expanding system before being output. The output homogenized high-energy laser light, after beam expansion, acts on the irradiated target material sample. The material sample fixing system is used to fix the irradiated target material sample. The material surface temperature monitoring system includes a high-precision target acquisition system, a binocular vision imaging system, and a multispectral wavelength temperature measurement system. The high-precision target acquisition system is used to acquire infrared thermal radiation from the laser-irradiated material surface. The binocular vision imaging system is used to realize three-dimensional thermal imaging of the laser-irradiated target material sample based on the acquired infrared thermal radiation. The multispectral wavelength temperature measurement system is used to realize three-dimensional temperature measurement of the laser-irradiated target material sample based on the three-dimensional thermal imaging.

[0020] This configuration provides a high-energy laser-damaged material surface temperature monitoring system. This system combines binocular vision thermometry with a high-energy laser-damaged target system (i.e., high-energy laser source, homogenizing fiber beam expander, and material sample fixation system) to establish a high-energy laser-damaged material surface temperature monitoring system. This allows for real-time and accurate measurement of the three-dimensional temperature of the target material under irradiation, meeting the requirements for three-dimensional temperature measurement of laser-irradiated targets. Therefore, compared with existing technologies, the high-energy laser-damaged material surface temperature monitoring system provided by this invention can achieve real-time and accurate measurement of the three-dimensional temperature of the target material under high-energy laser irradiation, effectively solving the technical problem of difficulty in achieving three-dimensional temperature monitoring in existing technologies.

[0021] Further, in the present application, in order to realize the homogenization and beam expansion of high-energy laser, the homogenization fiber beam expansion system comprises a homogenization fiber 21, a fiber connection joint, a beam expansion lens group 22 and a cooling circulation system 23, the homogenization fiber 21 is used for homogenizing the spot distribution of output laser, the fiber connection joint connects the homogenization fiber 21 and the beam expansion lens group 22, the beam expansion lens group 22 is used for homogenizing and beam expanding the output laser of the homogenization fiber, the cooling circulation system 23 is connected with the homogenization fiber 21 and the beam expansion lens group 22 respectively, and the heat generated by the homogenization fiber beam expansion system 20 during work is dissipated by the cooling circulation system 23. In the present application, the high-energy laser generally refers to laser with power of more than Kw.

[0022] As a specific embodiment of the present application, the high-energy laser source is a full-fiber laser.

[0023] Further, in the present application, the high-precision target acquisition system is composed of an infrared optical lens group and a medium-density filter, and is used for acquiring infrared thermal radiation of a laser-irradiated material surface; the multi-spectral wavelength temperature measurement system is composed of a multi-color filter and a multi-channel focal plane detector, and has high-precision wavelength selection and range switching capabilities.

[0024] According to another aspect of the present application, a high-energy laser damage material surface temperature monitoring method is provided, which uses the high-energy laser damage material surface temperature monitoring system as described above to monitor the high-energy laser damage material surface temperature. The high-energy laser damage material surface temperature monitoring method comprises: a high-energy laser source generates laser; a homogenization fiber homogenizes the spot distribution of output laser, a fiber connection joint connects the homogenization fiber and a beam expansion lens group, the beam expansion lens group homogenizes and beam expands the output laser of the homogenization fiber, and the heat generated by the homogenization fiber beam expansion system during work is dissipated by a cooling circulation system; the output homogenized high-energy laser is used to act on an irradiated target material sample after beam expansion, a high-precision target acquisition system acquires infrared thermal radiation of a laser-irradiated material surface; according to the acquired infrared thermal radiation, a binocular vision imaging system realizes three-dimensional thermal imaging of a laser-irradiated material; and according to the three-dimensional thermal imaging, a multi-spectral wavelength temperature measurement system realizes three-dimensional temperature measurement of the laser-irradiated material.

[0025] By using the configuration mode, a high-energy laser damage material surface temperature monitoring method is provided, which combines binocular vision temperature measurement technology and a high-energy laser damage target material system, establishes a high-energy laser damage material surface temperature monitoring system, and realizes real-time and accurate measurement of three-dimensional temperature of a target material under irradiation, thereby meeting the demand for three-dimensional temperature measurement of a laser-irradiated target material. Therefore, compared with the prior art, the high-energy laser damage material surface temperature monitoring method provided by the present application can realize real-time and accurate measurement of three-dimensional temperature of a target material under high-energy laser irradiation, and effectively solves the technical problem that three-dimensional temperature monitoring is difficult to realize in the prior art.

[0026] In order to further understand the present application, the following will be combined with specific embodiments of the present application Figure 1 and Figure 2 The high-energy laser damage material surface temperature monitoring system provided by the present application is described in detail.

[0027] As Figure 1 and Figure 2 shown, the specific embodiments according to the present application provide a high-energy laser damage material surface temperature monitoring system, which comprises a high-energy laser light source, a homogenization fiber beam expansion system, a material sample fixing system and a material surface temperature monitoring system.

[0028] The high-energy laser light source is a full-fiber laser. The full-fiber laser has simple structure, small size, light weight, compactness, stability, high cost performance, and can normally operate in harsh environments such as high impact, high vibration and dust. The high-energy laser light source generates laser light which is output after being homogenized and expanded by the homogenization fiber beam expansion system. The homogenization fiber beam expansion system is composed of a homogenization fiber, a fiber connection joint, a beam expansion lens group and a cooling circulation system. The homogenization fiber is used to homogenize the spot distribution of the output laser light, the fiber connection joint connects the homogenization fiber and the beam expansion lens group, the beam expansion lens group homogenizes and expands the output laser light of the homogenization fiber, and the heat generated by the homogenization fiber beam expansion system during operation is dissipated by the cooling circulation system.

[0029] The output homogenized high-energy laser is expanded and acts on the irradiation target material sample, which is fixed on the material sample fixing system, to measure the three-dimensional temperature field of the material. The measurement of the three-dimensional temperature field is carried out by the material surface temperature monitoring system. The material surface temperature monitoring system comprises a high-precision target acquisition system, a binocular vision imaging system and a multi-spectral wavelength temperature measurement system. The infrared thermal radiation of the laser irradiation material surface is collected by the high-precision target acquisition system, and according to the collected infrared thermal radiation, the three-dimensional thermal imaging of the laser irradiation material is realized by the binocular vision imaging system; according to the three-dimensional thermal imaging, the three-dimensional temperature measurement of the laser irradiation material is realized by the multi-spectral wavelength temperature measurement system.

[0030] In summary, the present application provides a high-energy laser damage material surface temperature monitoring system and method. The system combines binocular vision temperature measurement technology with high-energy laser damage target material system by designing high-energy laser light source, homogenization fiber beam expansion system, material sample fixing system and material surface temperature monitoring system, establishes a high-energy laser damage material surface temperature monitoring system to realize real-time accurate measurement of the three-dimensional temperature of the target material under irradiation, and meets the demand of three-dimensional temperature measurement of laser irradiation target material. Therefore, compared with the prior art, the high-energy laser damage material surface temperature monitoring system provided by the present application can realize real-time accurate measurement of the three-dimensional temperature of the target material under high-energy laser irradiation, and effectively solve the technical problem that three-dimensional temperature monitoring is difficult to realize in the prior art.

[0031] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one device or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a dependent "above" or "up" can be oriented "below" or "down" in the inverted orientation. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative terms used herein interpreted accordingly.

[0032] In addition, it is to be noted that the terms "first", "second", and the like, used herein do not necessarily have any specific meaning, unless otherwise explicitly stated, and are used merely to distinguish one component from another.

[0033] The preferred embodiments of the present application have been described above with the intent to enable those skilled in the art to make and use it. Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the scope of the disclosure. Accordingly, the disclosure is not intended to be limited to the examples described solely described above. Instead, it is to be accorded the full scope consistent with the claims, and to all changes equivalent thereto.

Claims

1. A high energy laser damage material surface temperature monitoring system, comprising: The high-energy laser damage material surface temperature monitoring system comprises a high-energy laser light source, a homogenized optical fiber beam expanding system, a material sample fixing system and a material surface temperature monitoring system, the high-energy laser light source generates laser light which is output after being homogenized and expanded by the homogenized optical fiber beam expanding system, the output homogenized high-energy laser light acts on the irradiation target material sample after being expanded, the material sample fixing system is used for fixing the irradiation target material sample, the material surface temperature monitoring system comprises a high-precision target acquisition system, a binocular vision imaging system and a multi-spectral wavelength temperature measurement system, the high-precision target acquisition system is used for acquiring infrared thermal radiation of the laser irradiation material surface, the binocular vision imaging system is used for realizing three-dimensional thermal imaging of the laser irradiation target material sample according to the acquired infrared thermal radiation, and the multi-spectral wavelength temperature measurement system is used for realizing three-dimensional temperature measurement of the laser irradiation target material sample according to the three-dimensional thermal imaging.

2. The high energy laser damage material surface temperature monitoring system of claim 1, wherein, The homogenized optical fiber beam expanding system comprises a homogenized optical fiber, an optical fiber connecting joint, an expanding lens group and a cooling circulation system, the homogenized optical fiber is used for homogenizing the spot distribution of the output laser light, the optical fiber connecting joint connects the homogenized optical fiber and the expanding lens group, the expanding lens group is used for homogenizing and expanding the output laser light of the homogenized optical fiber, and the cooling circulation system is connected with the homogenized optical fiber and the expanding lens group respectively, and the heat generated by the homogenized optical fiber beam expanding system during work is dissipated by the cooling circulation system.

3. The high energy laser damage material surface temperature monitoring system of claim 1, wherein, The high-energy laser light source is a full optical fiber laser.

4. The high energy laser damage to a material surface temperature monitoring system of claim 2 or 3, wherein, The high-precision target acquisition system is composed of an infrared optical lens group and a medium-density filter, and is used for acquiring infrared thermal radiation of the laser irradiation material surface; the multi-spectral wavelength temperature measurement system is composed of a multi-color filter and a multi-channel focal plane detector, and has high-precision wavelength selection and range switching capabilities.

5. A method for monitoring the temperature of a material surface damaged by a high energy laser, characterized by, The high-energy laser damage material surface temperature monitoring method uses the high-energy laser damage material surface temperature monitoring system as claimed in claims 1 to 4 to monitor the high-energy laser damage material surface temperature.

6. The high energy laser damage to a material surface temperature monitoring method of claim 5, wherein, The high-energy laser damage material surface temperature monitoring method comprises the following steps: The high-energy laser light source generates laser light; The homogenized optical fiber homogenizes the spot distribution of the output laser light, the optical fiber connecting joint connects the homogenized optical fiber and the expanding lens group, the expanding lens group homogenizes and expands the output laser light of the homogenized optical fiber, and the heat generated by the homogenized optical fiber beam expanding system during work is dissipated by the cooling circulation system; The output homogenized high-energy laser light acts on the irradiation target material sample after being expanded, the high-precision target acquisition system acquires infrared thermal radiation of the laser irradiation material surface; three-dimensional thermal imaging of the laser irradiation material is realized by the binocular vision imaging system according to the acquired infrared thermal radiation; and three-dimensional temperature measurement of the laser irradiation material is realized by the multi-spectral wavelength temperature measurement system according to the three-dimensional thermal imaging.

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