Synchronous moving and measuring frame based on CARS signal detection

Abstract

The utility model discloses a synchronous displacement measuring frame based on CARS signal detection, which comprises a main displacement measuring frame, an auxiliary displacement measuring frame and a control assembly, a first three-dimensional sliding table and an optical path transmitting unit arranged on the first three-dimensional sliding table and the main displacement measuring frame are arranged in the main displacement measuring frame, and the optical path transmitting unit is suitable for focusing to form CARS signals. The first three-dimensional sliding table can enable the CARS signals to move in the vertical direction and the front-back direction, a second three-dimensional sliding table and a light path receiving unit installed at the driving end of the second three-dimensional sliding table are arranged in the auxiliary moving and measuring frame, and the light path receiving unit is suitable for receiving the CARS signals. The input end of the control assembly is electrically connected with the first three-dimensional sliding table, the output end of the control assembly is connected with the second three-dimensional sliding table, and the control assembly is suitable for enabling the second three-dimensional sliding table and the first three-dimensional sliding table to keep synchronous movement. The problem that an existing synchronous moving and measuring frame is narrow in measuring range is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of CARS measurement, and relates to a synchronous moving measurement frame based on CARS signal detection. Background Art

[0002] The synchronous moving measurement frame mainly includes a main moving measurement frame (transmitting end), a secondary moving measurement frame (receiving end) and a moving measurement control box. The optical path and collection system are respectively installed in the main moving measurement frame and the secondary moving measurement frame. The outer space dimensions of the two moving measurement frames are the same: 808 mm (length) × 503 mm (width) × 524 mm (height). The moving measurement frame is installed on a platform cart with castors, and the position can be changed more conveniently. The moving measurement space range is: 100 mm × 100 mm × 100 mm.

[0003] In the synchronous moving measurement frame, the existing synchronous moving measurement frame can only measure a single point, and the measurement range is relatively narrow. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a synchronous moving measurement frame based on CARS signal detection, which solves the problem of narrow measurement range of the existing synchronous moving measurement frame.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A synchronous moving measurement frame based on CARS signal detection includes a main moving measurement frame, a secondary moving measurement frame and a control component. The main moving measurement frame is internally provided with a first three-dimensional sliding table and an optical path transmitting unit installed on the first three-dimensional sliding table and the main moving measurement frame. The optical path transmitting unit is adapted to focus and form a CARS signal. The first three-dimensional sliding table can move the CARS signal in the vertical and front-back directions. The secondary moving measurement frame is internally provided with a second three-dimensional sliding table and an optical path receiving unit installed at the driving end of the second three-dimensional sliding table. The optical path receiving unit is adapted to receive the CARS signal. The input end of the control component is electrically connected to the first three-dimensional sliding table, and the output end of the control component is connected to the second three-dimensional sliding table. The control component is adapted to make the second three-dimensional sliding table move synchronously with the first three-dimensional sliding table.

[0007] Further, the optical path transmitting unit includes a laser source, and a first incident reflecting mirror, a second incident reflecting mirror, a first commutation reflecting mirror, a second commutation reflecting mirror and an achromatic converging lens that the laser source reaches in sequence.

[0008] Further, the first incident reflecting mirror and the second incident reflecting mirror are both installed on the main moving measurement frame. The first commutation reflecting mirror is installed on the front-back driving end of the first three-dimensional sliding table. The second commutation reflecting mirror and the achromatic converging lens are both installed at the final output end of the first three-dimensional sliding table.

[0009] Furthermore, the cross section of the laser source is concentric circles, the inner layer of the concentric circles is one of the Stokes light or the CARS pumping and probing light, and the outer layer of the concentric circles is the other of the Stokes light or the CARS pumping and probing light.

[0010] Furthermore, the optical path receiving unit comprises a dichroic mirror, a collecting lens, a filter and an optical fiber holder which are sequentially arranged along the propagation path of the optical path.

[0011] Furthermore, the optical path receiving unit also includes a box body, the box body is provided with an optical path entrance, the dichroic mirror, collecting lens, filter and optical fiber holder are all built into the box body, and the dichroic mirror is suitable for receiving the light beam from the optical path entrance.

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

[0013] The synchronous moving and measuring frame of the utility model comprises a main moving and measuring frame, an auxiliary moving and measuring frame and a control component. The optical path transmitting unit is installed on the first three-dimensional slide and the main moving and measuring frame, and the optical path receiving unit is installed on the second three-dimensional slide. When initially placed or when the test location is changed, the main moving and measuring frame and the auxiliary moving and measuring frame are moved so that the two are basically aligned in physical position, and then the motors on the two platforms are respectively controlled by the control component, so that the light emitted by the optical path transmitting unit can be transmitted from the main moving and measuring frame to the auxiliary moving and measuring frame. The tail of the optical path receiving unit observes the laser coming out and is adjusted. The position of the optical path transmitting unit is regulated by the first three-dimensional slide, so that the CARS signal converges on the test position. Under the action of the control component, the second three-dimensional slide is kept in synchronous movement with the first three-dimensional slide, so that the optical path receiving unit can always receive the optical signal. In this way, the auxiliary moving and measuring frame can be automatically aligned with the main moving and measuring frame, and the CARS signal can be quickly excited and collected, so as to realize real-time single-point CARS signal measurement at different positions, and the measurement range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work, including:

[0015] Figure 1 This is a structural schematic diagram of a synchronous moving test frame based on CARS signal detection according to an embodiment of the utility model;

[0016] Figure 2 for Figure 1 Top view of the .

[0017] Markings in the figure:

[0018] 10 - Main moving measurement frame; 11 - First three-dimensional slide; 12 - Laser source; 13 - First incident and reflecting mirror; 14 - Second incident and reflecting mirror; 15 - First reversing mirror; 16 - Second reversing mirror; 17 - Achromatic converging lens;

[0019] 20 - Sub moving measurement frame; 21 - Second three-dimensional slide; 22 - Dichroic mirror; 23 - Collection lens; 24 - Filter; 25 - Fiber optic holder; 26 - Box body; 261 - Optical path entrance;

[0020] 30 - Control component;

[0021] 40 - CARS signal. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings below is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0024] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0025] As described in the background art, in the synchronous moving measurement frame, the existing synchronous moving measurement frame can only measure a single point, and the measurement range is relatively narrow.

[0026] Based on this, the inventor created a synchronous moving measurement frame based on CARS signal detection in this application to solve the above technical problems.

[0027] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0028] Embodiment

[0029] Please refer to Figure 1 、 Figure 2 , a synchronous moving measurement frame based on CARS signal detection, including a main moving measurement frame 10, a secondary moving measurement frame 20 and a control component 30. The main moving measurement frame 10 and the secondary moving measurement frame 20 are relatively installed on the base. For example, a plurality of Fuma wheels can also be installed at the bottoms of the main moving measurement frame 10 and the secondary moving measurement frame 20 to facilitate transportation, facilitate moving to the target position and performing measurements based on the CARS signal 40.

[0030] The main moving measurement frame 10 is internally provided with a first three-dimensional slide 11 and an optical path emitting unit installed on the first three-dimensional slide 11 and the main moving measurement frame 10. The optical path emitting unit is adapted to focus and form the CARS signal 40. The first three-dimensional slide 11 can move the CARS signal 40 in the vertical and front-back directions. Here, both the first three-dimensional slide 11 and the following second three-dimensional slide 21 are used to drive the components at the driving end to move in three dimensions, that is, the x-axis direction, the y-axis direction and the z-axis direction. The front-back direction here refers to the direction perpendicular to the direction in which the light of the optical path emitting unit emits.

[0031] The secondary moving measurement frame 20 is internally provided with a second three-dimensional slide 21 and an optical path receiving unit installed at the driving end of the second three-dimensional slide 21. The optical path receiving unit is adapted to receive the CARS signal 40. Here, it should be noted that the position where the CARS signal 40 converges is the position of the point to be measured. After moving the entire synchronous moving measurement frame near the point to be measured, the first three-dimensional slide 11 can be adjusted accurately to make the CARS signal 40 converge on the point to be measured, and the optical path receiving unit receives the generated CARS signal 40 and can then be analyzed to realize the measurement of the point to be measured (for example, temperature measurement).

[0032] The input end of the control component 30 is electrically connected to the first three-dimensional slide table 11, and the output end of the control component 30 is connected to the second three-dimensional slide table 21. The control component 30 is adapted to keep the second three-dimensional slide table 21 moving synchronously with the first three-dimensional slide table 11. Here, that is to say, the second three-dimensional slide table 21 can follow the movement of the first three-dimensional slide table 11, so that the optical path receiving unit can always receive the excited CARS signal 40 from the optical path transmitting unit.

[0033] The synchronous moving and measuring frame of the present utility model includes a main moving and measuring frame 10, a sub-moving and measuring frame 20 and a control component 30. The optical path transmitting unit is installed on the first three-dimensional slide table 11 and the main moving and measuring frame 10, and the optical path receiving unit is installed on the second three-dimensional slide table 21. When initially placing or changing the test location, move the main moving and measuring frame 10 and the sub-moving and measuring frame 20 to make them basically aligned in the physical position. Then, respectively control the motors on the two tables through the control component 30, so that the light emitted by the optical path transmitting unit can be transmitted from the main moving and measuring frame 10 to the sub-moving and measuring frame 20. When the tail of the optical path receiving unit observes the laser coming out, it is adjusted. The position of the optical path transmitting unit is adjusted by the first three-dimensional slide table 11, so that the CARS signal 40 converges at the test position. Under the action of the control component 30, the second three-dimensional slide table 21 is kept moving synchronously with the first three-dimensional slide table 11, which can ensure that the optical path receiving unit can always receive the optical signal. In this way, the automatic alignment of the sub-moving and measuring frame 20 and the main moving and measuring frame 10 can be realized, the excitation and collection of the CARS signal can be carried out quickly, the real-time single-point CARS signal measurement at different positions can be realized, and the measurement range is wide.

[0034] In another embodiment, the optical path transmitting unit includes a laser source 12, and a first incident mirror 13, a second incident mirror 14, a first commutation mirror 15, a second commutation mirror 16 and an achromatic converging lens 17 that the laser source 12 reaches in sequence. After being adjusted by the first incident mirror 13 and the second incident mirror 14, the laser source 12 vertically enters (in the x-axis direction) the first commutation mirror 15. The first commutation mirror 15 turns the parallel light beam by 90 degrees and vertically enters (in the z-axis direction) the second commutation mirror 16. The second commutation mirror 16 turns the parallel light beam by another 90 degrees and vertically enters (in the y-axis direction) the achromatic converging lens 17. The achromatic converging lens 17 focuses the laser source 12 on a certain point in the flow field to generate the CARS signal 40. By moving the first three-dimensional slide table 11 in the x, y and z directions, the excitation of the CARS signal 40 at any spatial position can be realized within the moving and measuring range of 100mmX100mmX100mm.

[0035] In another embodiment, the first incident mirror 13 and the second incident mirror 14 are both mounted on the main moving and measuring frame 10, the first commutation mirror 15 is mounted on the front and rear driving end of the first three-dimensional slide 11, and the second commutation mirror 16 and the achromatic converging lens 17 are both mounted on the final output end of the first three-dimensional slide 11. For example, the front and rear driving end can be a slider of the first three-dimensional slide 11 that can only slide in the front and rear directions, while the final output end can move in three dimensions. With such a setting, the structure is simple. Preferably, the cross-section of the laser source 12 is a concentric circle, the inner layer of the concentric circle is one of the Stokes light or the CARS pump-probe light, and the outer layer of the concentric circle is the other of the Stokes light or the CARS pump-probe light. With such a setting, when the Stokes light and the CARS pump-probe light are focused on a certain point in the flow field, a CARS signal 40 can be generated.

[0036] In another embodiment, the optical path receiving unit includes a dichroic mirror 22, a collecting lens 23, a filter 24, and an optical fiber base 25 that are sequentially arranged along the propagation path of the optical path. Among the CARS signals 40 to be collected, for example, there is a pump light of 532 nm and a Stokes light of 607 nm, which are filtered by the dichroic mirror 22, and then the CARS signal 40 is converged to the incident end face of the optical fiber base 25 by the collecting lens 23. A filter 24 is arranged in front of the incident end of the optical fiber base 25 to ensure that only the light of the CARS signal 40 enters the optical fiber connected behind the optical fiber base 25. For example, the collecting lens 23 can have an adjustment margin of 25 mm in the front and rear directions, and the incident end face of the optical fiber base 25 can have an adjustment margin of 3 mm to ensure that the CARS optical signal is coupled to the center of the optical fiber. According to the moving amounts of the first three-dimensional slide 11 of the main moving and measuring frame 10 in the x-direction, y-direction, and z-direction, the second three-dimensional slide 21 on the secondary moving and measuring frame 20 makes corresponding movements, and the collection and extraction of the CARS signal 40 light within the spatial range can be achieved. Preferably, the optical path receiving unit further includes a box body 26, the box body 26 is provided with an optical path entrance 261, the dichroic mirror 22, the collecting lens 23, the filter 24, and the optical fiber base 25 are all built in the box body 26, and the dichroic mirror 22 is adapted to receive the light beam from the optical path entrance 261. With such a setting, the installation of each component is simple and the protection effect is better.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, and improvements made by those skilled in the art within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronous moving test stand based on CARS signal detection, characterized in that: It includes a main movable frame, an auxiliary movable frame and a control component. The main movable frame has a first three-dimensional slide and an optical path emitting unit installed on the first three-dimensional slide and the main movable frame. The optical path emitting unit is suitable for focusing to form a CARS signal. The first three-dimensional slide can move the CARS signal in the vertical and front-to-back directions. The auxiliary movable frame has a second three-dimensional slide and an optical path receiving unit installed on the driving end of the second three-dimensional slide. The optical path receiving unit is suitable for receiving the CARS signal. The input end of the control component is electrically connected to the first three-dimensional slide, and the output end of the control component is connected to the second three-dimensional slide. The control component is suitable for keeping the second three-dimensional slide in synchronous motion with the first three-dimensional slide.

2. The synchronous moving test stand based on CARS signal detection according to claim 1 is characterized in that: The optical path emitting unit comprises a laser source, and a first incident reflection mirror, a second incident reflection mirror, a first switching reflection mirror, a second switching reflection mirror and an achromatic converging mirror which are sequentially reached by the laser source.

3. The synchronous moving and measuring frame based on CARS signal detection according to claim 2 is characterized in that: The first incident reflector and the second incident reflector are both installed on the main moving frame, the first reversing reflector is installed on the front and rear driving ends of the first three-dimensional slide, and the second reversing reflector and the achromatic converging mirror are both installed on the final output end of the first three-dimensional slide.

4. The synchronous moving test stand based on CARS signal detection according to claim 3 is characterized in that: The cross section of the laser source is in the form of concentric circles, the inner layer of the concentric circles is one of the Stokes light or the CARS pumping and probing light, and the outer layer of the concentric circles is the other of the Stokes light or the CARS pumping and probing light.

5. The synchronous moving test stand based on CARS signal detection according to claim 1, characterized in that: The optical path receiving unit comprises a dichroic mirror, a collecting lens, a filter and an optical fiber holder which are sequentially arranged along the propagation path of the optical path.

6. The synchronous moving test stand based on CARS signal detection according to claim 5, characterized in that: The optical path receiving unit further comprises a box body, the box body is provided with an optical path entrance, the dichroic mirror, collecting lens, filter and optical fiber holder are all built in the box body, and the dichroic mirror is suitable for receiving the light beam from the optical path entrance.

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