Angle-adjustable laser-induced breakdown spectroscopy acquisition device

Abstract

The utility model discloses an angle-adjustable laser-induced breakdown spectrum acquisition device which comprises an objective table, a support frame, an acquisition lens, an ablation angle adjusting assembly, an acquisition distance adjusting assembly and an acquisition angle adjusting assembly, the ablation angle adjusting assembly comprises a first rotary driving part arranged on one side of the supporting frame, and an output shaft of the first rotary driving part is fixed to the side wall of the objective table; the acquisition distance adjusting assembly comprises a linear moving mechanism arranged right above the objective table, and the moving end of the linear moving mechanism is connected with the acquisition lens; the acquisition angle adjusting assembly comprises a second rotary driving part and a connecting frame; in the laser paint removal spectrum monitoring process, spectrum characteristic signals can be obtained when the laser ablation angle, the collection angle and the collection distance serve as single variables, when any one of the spectrum collection angle, the ablation angle and the spectrum collection distance serves as a single factor variable, the other two are kept unchanged, and the spectrum characteristic signals are obtained. Therefore, the influence on the real value of the spectral characteristic signal is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser cleaning monitoring technical field, concretely is a kind of angle adjustable laser-induced breakdown spectroscopy collection device. BACKGROUND

[0002] Laser cleaning and laser-induced breakdown spectroscopy technology can be combined to realize the process monitoring and cleaning control of aircraft skin paint layer removal.The method can reduce the damage of paint removal aircraft structure while effectively improving the laser paint removal efficiency and quality.

[0003] Due to the complex curved surface of the aircraft skin, it is difficult to fix the relative position of the laser beam and the paint layer (ablation angle). The difference in ablation angle will induce different paint removal effects and spectral excitation effects. As a common spectral collection method for complex curved surfaces, the off-axis collection lens and the paint layer are difficult to fix in terms of relative position (collection angle) when dealing with complex curved surfaces such as aircraft skin. The relative distance (collection distance) from the off-axis collection lens to the surface of the paint layer to be measured is difficult to fix. The difference in collection angle and distance affects the acquisition of spectral feature true values. Therefore, it is of great significance to design a spectral collection experimental simulation device with adjustable laser ablation angle to theoretically analyze and experimentally verify the ablation angle and collection angle during laser paint removal, and to obtain the true influence of laser ablation angle and off-axis spectral collection angle on laser paint removal spectral feature signals.

[0004] Some existing spectral collection experimental simulation devices, when acquiring ablation angle, collection angle and collection distance, it is usually difficult to keep the other two variables constant when any one of them is used as a single factor variable. For example, when the ablation angle changes, the collection angle and the collection distance cannot remain constant, and the influence of the ablation angle, the collection angle and the collection distance on the true value of the spectral feature signal cannot be obtained, which is not conducive to the theoretical analysis and experimental verification of laser paint removal spectral monitoring. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a kind of angle adjustable laser-induced breakdown spectroscopy collection device to solve the problem of obtaining the influence of ablation angle, collection angle and collection distance on the true value of spectral feature signal in the prior art.

[0006] The technical scheme of the utility model is:

[0007] The utility model provides an angle adjustable laser induced breakdown spectroscopy collection device, including the stage with the pneumatic adsorption subassembly of matter, support frame and collection lens still includes ablation angle adjusting subassembly, collection distance adjusting subassembly and collection angle adjusting subassembly, ablation angle adjusting subassembly includes first rotation drive part, first rotation drive part sets up in one side of support frame, first rotation drive part has the output shaft of horizontal arrangement, and output shaft is fixedly connected with the lateral wall of stage, and first rotation drive part is used for driving stage rotation, collection distance adjusting subassembly includes linear movement mechanism, linear movement mechanism sets up in the right above of stage, and the moving end of linear movement mechanism is connected with collection lens, and linear movement mechanism is used for driving collection lens vertical movement and adjusts the interval of collection lens and stage, collection angle adjusting subassembly includes second rotation drive part and connecting frame, second rotation drive part sets up in the other side of support frame, second rotation drive part has the output shaft, and output shaft is coaxial with the output shaft of first rotation drive part, and the output shaft of second rotation drive part is connected with linear movement mechanism through connecting frame, and second rotation drive part is used for driving linear movement mechanism and collection lens swing around the axial direction of first rotation drive part output shaft.

[0008] Preferably, as a further improvement of the utility model, the first rotation drive part and the second rotation drive part are both motors or rudders, the bodies of the two motors or rudders are fixed to the support frame, and the output shafts of the two motors or rudders are respectively fixed to the center of the lateral wall of the stage and the connecting frame.

[0009] Preferably, as a further improvement of the utility model, the linear movement mechanism comprises a mounting seat, two sliding rails, a rack, a sliding seat, a first drive motor and a gear, the mounting seat is vertically arranged, the two sliding rails are parallelly fixed to the lateral wall of the mounting seat, the rack is fixed to the lateral wall of one of the sliding rails, the sliding seat is slidingly connected between the two sliding rails and located above the rack, the first drive motor is fixed to the sliding seat, the output shaft of the first drive motor is connected to the gear after penetrating through the sliding seat, the gear is engaged with the rack, and the collection lens is fixed to the sliding seat.

[0010] Preferably, as a further improvement of the utility model, the sliding seat is provided with a distance measuring sensor, the distance measuring sensor is electrically connected to a controller, and is used for detecting the distance from the collection lens to the stage during the movement of the collection lens.

[0011] Preferably, as a further improvement of the utility model, the connecting frame comprises a first connecting rod and a second connecting rod, the first connecting rod is vertically arranged, and one end of the first connecting rod is fixedly connected with the output shaft of the second rotary driving part, the second connecting rod is horizontally arranged, one end of the second connecting rod is fixed with the other end of the first connecting rod, and the other end of the second connecting rod is connected with the mounting seat.

[0012] Preferably, as a further improvement of the utility model, an inclination angle adjusting assembly is arranged at the connection between the second connecting rod and the mounting seat, the inclination angle adjusting assembly comprises a second driving motor and a connecting seat, the body of the second driving motor is fixed at the end of the second connecting rod, the output shaft of the second driving motor is horizontally and perpendicularly arranged to the second connecting rod, one side wall of the connecting seat is fixed with the output shaft of the second driving motor, and the other side wall of the connecting seat is fixed with the mounting seat.

[0013] Preferably, as a further improvement of the utility model, the support frame comprises a base, a support rod and a support shaft, the support rod is fixed at the top of the base, the support shaft is horizontally arranged and fixed at the top of the support rod, and the first rotary driving part and the second rotary driving part are symmetrically arranged at the two ends of the support shaft.

[0014] Preferably, as a further improvement of the utility model, the support rod and the second connecting rod are both telescopic rods.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] In the laser paint removal spectrum monitoring process, the utility model can realize the acquisition of the spectrum characteristic signal when the laser ablation angle, the collection angle and the collection distance are single variables, the first rotary driving part can realize the angle adjustment function of the object table, so that the material ablation angle is adjusted, the second rotary driving part can drive the linear movement mechanism and the collection lens to swing around the axis direction of the output shaft of the first rotary driving part, so that the collection angle of the collection lens rotating around the object table is adjusted, the linear movement mechanism can drive the collection lens to move along the direction perpendicular to the object table to adjust the distance between the collection lens and the object table, so that the collection distance of the collection lens is adjusted, when any one of the spectrum collection angle, the ablation angle and the spectrum collection distance is a single factor variable, the other two remain unchanged, so that the influence of the ablation angle, the collection angle and the collection distance three variables on the true value of the spectrum characteristic signal is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0018] Fig. 2This is a schematic diagram of the linear motion component in this utility model;

[0019] Fig. 3 This is a schematic diagram of the structure of the linear motion component of this utility model when the gear and rack are meshing. Detailed Implementation

[0020] The following is in conjunction with the appendix Figs. 1 to 3 The specific embodiments of this utility model will be described in detail below. In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of a utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] Example

[0023] like Figs. 1 to 3 As shown, this utility model embodiment provides an angle-adjustable laser-induced breakdown spectrum acquisition device, including a stage 1 with a pneumatic adsorption component, a support frame 2, and an acquisition lens 3. It also includes an ablation angle adjustment component, an acquisition distance adjustment component, and an acquisition angle adjustment component. The ablation angle adjustment component includes a first rotation drive unit 4, which is disposed on one side of the support frame 2. The first rotation drive unit 4 has a horizontally arranged output shaft, which is fixedly connected to the side wall of the stage 1 to drive the stage 1 to rotate. The acquisition distance adjustment component includes a linear movement mechanism 5. The linear movement mechanism 5 is configured with... The linear motion mechanism 5 is positioned directly above the stage 1. Its moving end is connected to the acquisition lens 3, which is used to drive the acquisition lens 3 to move vertically and adjust the distance between the acquisition lens 3 and the stage 1. The acquisition angle adjustment component includes a second rotary drive unit 6 and a connecting frame. The second rotary drive unit 6 has an output shaft, which is coaxially arranged with the output shaft of the first rotary drive unit 4. The output shaft of the second rotary drive unit 6 is connected to the linear motion mechanism 5 through the connecting frame, which is used to drive the linear motion mechanism 5 and the acquisition lens 3 to swing around the axis of the output shaft of the first rotary drive unit 4 to adjust the acquisition angle of the acquisition lens 3.

[0024] In this embodiment, the first rotating drive part 4 can drive the object table 1 to rotate, realizing the angle adjustment function of the object table 1, so as to adjust the ablation angle of the material. The second rotating drive part 6 can drive the linear moving mechanism 5 and the collection lens 3 to swing around the axis of the output shaft of the first rotating drive part 4, so as to adjust the collection angle of the collection lens 3. The linear moving mechanism 5 can drive the collection lens 3 to move along the direction perpendicular to the object table 1, so as to adjust the distance between the collection lens 81 and the object table 1, thereby realizing the adjustment of the collection distance of the collection lens 81. When any one of the spectral collection angle, the ablation angle and the spectral collection distance is taken as a single factor variable, and the other two remain unchanged, the influence of the three variables of the ablation angle, the collection angle and the collection distance on the true value of the spectral characteristic signal is reduced.

[0025] In the formula, the pneumatic adsorption assembly is a gas pump, the gas pump is installed at the bottom of the object table 1, and a plurality of suction holes are formed in the top surface of the object table 1. The gas pump adsorbs and fixes the sample assembly through the plurality of suction holes.

[0026] Specifically, the first rotating drive part 4 and the second rotating drive part 6 are both motors or rudders, the bodies of the two motors or rudders are fixed with the support frame 2 respectively, and the output shafts of the two motors or rudders are fixed with the side wall center of the object table 1 and the connecting frame respectively.

[0027] Specifically, the linear moving mechanism 5 includes a mounting seat 51, two slide rails 52, a rack 53, a sliding seat 54, a first drive motor 55 and a gear 56. The mounting seat 51 is vertically arranged. The two slide rails 52 are fixed on one side wall of the mounting seat 51 in parallel. The rack 53 is fixed on the side wall of one of the slide rails 52. The sliding seat 54 is slidingly connected between the two slide rails 52 and located above the rack 53. The first drive motor 55 is fixed on the sliding seat 54. The output shaft of the first drive motor 55 is connected with the gear 56 after penetrating through the sliding seat 54. The gear 56 is engaged with the rack 53. The collection lens 3 is fixed on the sliding seat 54. When the collection lens 3 is driven to move by the linear moving mechanism 5, the first drive motor 55 is controlled to drive the gear 56 to rotate. The gear 56 moves along the rack 53 to drive the sliding seat 54 to slide along the slide rail 52, thereby synchronously driving the collection lens 3 to move.

[0028] Further, a distance measuring sensor 57 is arranged on the sliding seat 54. The distance measuring sensor 57 and the first drive motor 55 are electrically connected with an external operation host and other controllers respectively. The distance measuring sensor 57 can detect the distance from the collection lens 3 to the object table 1 in real time during the movement of the collection lens 3, and feed back to the external operation host for display, so as to control the movement process of the linear moving mechanism 5.

[0029] Specific, connecting frame includes first connecting rod 61 and second connecting rod 62, first connecting rod 61 is vertically arranged, and one end is fixedly connected with the output shaft of second rotary drive part 6, second connecting rod 62 is horizontally arranged, one end of second connecting rod 62 is fixed with the other end of first connecting rod 61, and the other end of second connecting rod 62 is connected with mounting seat 51.

[0030] In another embodiment of the utility model, in order to avoid the coaxial acquisition (when laser incident beam path and spectral acquisition path coincide, it is called coaxial acquisition), therefore, the connecting place of second connecting rod 62 and mounting seat 51 is equipped with the inclination angle adjusting assembly, the inclination angle adjusting assembly includes second drive motor 7 and connecting seat, the body of second drive motor 7 is fixed at the end of second connecting rod 62, the output shaft of second drive motor 7 is horizontally arranged and is perpendicular to second connecting rod 62, one side wall of connecting seat is fixed with the output shaft of second drive motor 7, the other side wall of connecting seat is fixed with mounting seat 51, the inclination angle of acquisition lens 81 can be adjusted by rotating mounting seat 51 by second drive motor 7, and then the spectral acquisition path is adjusted, to avoid the problem of coaxial acquisition caused by coinciding with laser incident beam path in the acquisition process.

[0031] In another embodiment of the utility model, in order to be able to timely blow off the dust and smoke generated in the laser paint removal process, reduce the influence of dust and smoke on spectral acquisition, a nozzle 9 is fixed on the lower end side wall of mounting seat 51, the nozzle 9 is connected with external blowing mechanism, and is used for blowing off the dust generated on the surface of sample in the laser paint removal process.

[0032] Specifically, the support frame 2 includes a base 21, a support rod 22 and a support shaft 23, the support rod 22 is fixed on the top of the base 21, and the support shaft 23 is horizontally arranged and fixed on the top of the support rod 22.

[0033] In another embodiment of the utility model, in order to be able to adjust the size and length of the device according to the demand in the experiment simulation, the support rod 22 and the second connecting rod 62 are both telescopic rods.

[0034] Wherein, the end of first connecting rod 61 is fixed with annular frame 8, and the circumference of annular frame 8 is provided with scale value, so as to facilitate the reference of rotation angle.

[0035] The working principle of the utility model is as follows:

[0036] Purpose 1: when only changing the material ablation angle in the monitoring process, the spectral acquisition distance and the spectral acquisition angle are unchanged:

[0037] Operation mode: ①Run the control unit, open the air pump. ②The sample to be measured is adsorbed on the stage. ③The control command is input in the control unit, so that the first rotary drive part 4 drives the stage 1 to rotate, the angle of the stage 1 is adjusted, so that the material ablation angle is adjusted, in the process, the linear movement mechanism 5 and the second rotary drive part 6 remain stationary.

[0038] Objective 2: When only the spectral collection distance is changed in the monitoring process, the spectral collection angle and the material ablation angle remain unchanged:

[0039] Operation mode: ①Run the control unit, open the air pump. ②The sample to be measured is adsorbed on the stage. ③The control command is input in the control unit, so that the linear movement mechanism 5 drives the collection lens 81 to move along the direction perpendicular to the stage 1, so that the collection distance of the collection lens 81 is adjusted, in the process, the first rotary drive part 4 and the second rotary drive part 6 remain stationary.

[0040] Objective 3: Only the spectral collection angle is changed in the monitoring process, the spectral collection distance and the material ablation angle remain unchanged.

[0041] Operation mode: ①Run the control unit, open the air pump. ②The sample to be measured is adsorbed on the stage. ③The control command is input in the control unit, so that the second rotary drive part 6 rotates, drives the linear movement mechanism 5 and the collection lens 3 to swing around the axis direction of the output shaft of the first rotary drive part 4, to adjust the collection angle of the collection lens 3, in the process, the first rotary drive part 4 and the linear movement mechanism 5 remain stationary.

[0042] The above disclosed is only a few preferred specific embodiments of the present application, but the present application is not limited to this, any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. An angle-adjustable laser-induced breakdown spectroscopy acquisition device, comprising a carrier table (1) provided with a pneumatic adsorption assembly, a support frame (2) and an acquisition lens (3), characterized in that, Also include: The ablation angle adjusting assembly includes a first rotary drive part (4), which is arranged on one side of the support frame (2). The first rotary drive part (4) has a horizontally arranged output shaft, which is fixedly connected with the side wall of the object table (1). The first rotary drive part (4) is used to drive the object table (1) to rotate. The collection distance adjusting assembly includes a linear motion mechanism (5), which is arranged directly above the object table (1). The moving end of the linear motion mechanism (5) is connected with the collection lens (3). The linear motion mechanism (5) is used to drive the collection lens (3) to move in a direction perpendicular to the object table (1). The collection angle adjusting assembly includes a second rotary drive part (6) and a connecting frame. The second rotary drive part (6) is arranged on the other side of the support frame (2). The second rotary drive part (6) has an output shaft, which is coaxially arranged with the output shaft of the first rotary drive part (4). The output shaft of the second rotary drive part (6) is connected with the linear motion mechanism (5) through the connecting frame. The second rotary drive part (6) is used to drive the linear motion mechanism (5) and the collection lens (3) to swing around the axis of the output shaft of the first rotary drive part (4).

2. The angle adjustable laser-induced breakdown spectroscopy collection device according to claim 1, wherein, The first rotary drive part (4) and the second rotary drive part (6) are both motors or rudders. The bodies of the two motors or rudders are fixedly connected with the support frame (2). The output shafts of the two motors or rudders are respectively fixedly connected with the center of the side wall of the object table (1) and the connecting frame.

3. The angle adjustable laser-induced breakdown spectroscopy collection device according to claim 1, wherein, The linear motion mechanism (5) includes a mounting seat (51), two slide rails (52), a rack (53), a sliding seat (54), a first drive motor (55) and a gear (56). The mounting seat (51) is vertically arranged. The two slide rails (52) are fixedly arranged on one side wall of the mounting seat (51). The rack (53) is fixedly arranged on the side wall of one of the slide rails (52). The sliding seat (54) is slidingly connected between the two slide rails (52) and located above the rack (53). The first drive motor (55) is fixedly arranged on the sliding seat (54). The output shaft of the first drive motor (55) is connected with the gear (56) after penetrating through the sliding seat (54). The gear (56) is engaged with the rack (53). The collection lens (3) is fixedly arranged on the sliding seat (54).

4. The angle adjustable laser-induced breakdown spectroscopy collection device according to claim 3, wherein, A distance measuring sensor (57) is arranged on the sliding seat (54). The distance measuring sensor (57) is electrically connected with a controller and is used to detect the distance between the collection lens (3) and the object table (1).

5. The angle adjustable laser-induced breakdown spectroscopy collection device according to claim 3, wherein, The connecting frame comprises a first connecting rod (61) and a second connecting rod (62), the first connecting rod (61) is vertically arranged, and one end of the first connecting rod (61) is fixedly connected with an output shaft of the second rotary driving part (6), the second connecting rod (62) is horizontally arranged, one end of the second connecting rod (62) is fixed with the other end of the first connecting rod (61), and the other end of the second connecting rod (62) is connected with the mounting base (51).

6. The angle adjustable laser-induced breakdown spectroscopy collection device according to claim 5, wherein, The connecting place of the second connecting rod (62) and the mounting base (51) is provided with an inclination angle adjusting assembly, the inclination angle adjusting assembly comprises a second driving motor (7) and a connecting base, the body of the second driving motor (7) is fixed at the end of the second connecting rod (62), the output shaft of the second driving motor (7) is horizontally and vertically arranged with the second connecting rod (62), one side wall of the connecting base is fixed with the output shaft of the second driving motor (7), and the other side wall of the connecting base is fixed with the mounting base (51).

7. The angle adjustable laser-induced breakdown spectroscopy collection device according to claim 6, wherein, The support frame (2) comprises a base (21), a support rod (22) and a support shaft (23), the support rod (22) is fixed at the top of the base (21), and the support shaft (23) is horizontally arranged and fixed at the top of the support rod (22), the first rotary driving part (4) and the second rotary driving part (6) are symmetrically arranged at two ends of the support shaft (23) respectively.

8. The angle adjustable laser-induced breakdown spectroscopy collection device according to claim 7, wherein, The support rod (22) and the second connecting rod (62) are both telescopic rods.

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