CN111781187A - A Bidirectional Tensile Stress Micro-Raman Stage for Fibrous Samples - Google Patents

Abstract

A fibrous sample bidirectional tensile stress micro-Raman sample stage belongs to the field of Raman imaging experimental equipment. In order to solve the problem that the observation point will be displaced in the fiber material analysis and the analysis point cannot be guaranteed to be in the original position. One axis of the sample stage frame of the present invention is marked as the reference axis; the first scale area, the second scale area, the first stretching assembly, the second stretching assembly, and the pulleys are distributed symmetrically with the reference axis as the center line; The first spring of the stretching assembly is connected to the first multi-point fixed splint and the traction wire; the first multi-point fixed splint is provided with a first multi-point fixed splint scale pointer, and the first spring is provided with a first spring tension scale pointer; The components and connection methods of the second tensioning assembly are the same as those of the first tensioning assembly; the traction wire connecting the first spring and the second spring is jointly connected to the common stretching knob through the pulley block, and the traction wire is also centered on the reference axis Line symmetrical distribution. Mainly used to set up fibrous samples for bidirectional tensile stress microscopy imaging.

Description

A Bidirectional Tensile Stress Micro-Raman Stage for Fibrous Samples

technical field

The present invention relates to a tensile stress micro-Raman stage for fibrous samples. It belongs to the field of Raman imaging experimental equipment.

Background technique

The change analysis of the sample structure under the tensile deformation of fibrous samples (such as carbon fibers) is one of the key directions of the analysis of the properties and structure of fibrous materials. However, the difficulty in the analysis of carbon fiber materials is that the stretching process will cause the displacement of the observation point, and re-moving the sample cannot ensure that the analysis point is in the original position, which reduces the reliability of the analysis. The peak position shift of Raman spectrum is the main measurement method and basis for the change of material tensile stress, but the existing tensile stress platform cannot realize in-situ observation under the application of tensile stress. Due to its large size, it cannot be placed under the existing Raman microscope for stress testing, which limits the observation and data analysis of tensile stress changes for some samples.

SUMMARY OF THE INVENTION

The invention is to solve the problem that the observation point will be displaced in the analysis of the fiber material, and the analysis point cannot be guaranteed to be in the original position, resulting in low reliability of the analysis.

A fibrous sample bidirectional tensile stress micro-Raman sample stage, comprising: a sample stage frame 27, a first tension assembly, a second tension assembly, a set of pulleys, and a common tension knob 17 arranged inside the sample stage frame ;

An axis of the sample stage frame is recorded as the reference axis; a first scale area 12 and a second scale area 22 are arranged on the edge of a sample table frame in the vertical direction of the reference axis; the first scale area and the second scale area are The reference axis is symmetrically distributed on the center line;

The number of pulleys of the pulley block is an even number, and they are arranged symmetrically along the reference axis;

The first stretching assembly includes: the first multi-point fixed splint 3, the first spring 14, the first multi-point fixed splint scale pointer 15, and the first spring tension scale pointer 13; one end of the first spring 14 is connected to the first multi-point At the center of the fixed splint; the other end of the first spring 14 is connected to the traction wire; the first multi-point fixed splint scale pointer 15 is provided on the first multi-point fixed splint, and one end of the first spring 14 connected to the traction wire is provided with a first multi-point fixed splint scale pointer 15 The spring stretched scale pointer 13; the first multi-point fixed splint scale pointer 15 and the first spring stretched scale pointer 13 point vertically to the first scale area;

The second tension assembly includes: a second multi-point fixed splint 8, a second spring 21, a second multi-point fixed splint scale pointer 20, a second spring tension scale pointer 23; the first spring 14, the second spring 21 The two springs are exactly the same; the connection mode of the second multi-point fixed splint 8, the second spring 21, the second multi-point fixed splint scale pointer 20, and the second spring tension scale pointer 23 of the second tension assembly is the same as that of the second spring. The first stretch assembly is the same; the second multi-point fixed splint scale pointer 20 and the second spring stretch scale pointer 23 point vertically to the second scale area;

The first stretching assembly and the second stretching assembly are symmetrically distributed with the reference axis as the center line;

The pulling wire connecting the first spring 14 and the pulling wire connecting the second spring 21 are jointly connected to the common stretching knob 17 through the pulley block, and it is ensured that the pulling wires are also symmetrically distributed around the reference axis.

Further, the first spring is vertically arranged with the first multi-point fixing splint. The second spring is vertically arranged with the second multi-point fixing splint.

Further, the first multi-point fixed splint and the second multi-point fixed splint are two splints with the same mirror image as the reference axis.

Further, one side of the first multi-point fixing splint is provided with a plurality of sample mounting holes, and each sample mounting hole is provided with a screw.

Further, the common stretching knob is provided with a self-locking device.

The beneficial effects of the present invention are:

The invention can ensure the in-situ invariant characteristics of the observation point during the collection of the tensile stress Raman spectrum of the fibrous sample, and at the same time, the magnitude of the tensile stress and the sample deformation during data collection can be recorded.

Description of drawings

Figure 1 is a schematic diagram of the placement area of the biaxially stretched sample stage in the complete Raman spectrum acquisition system;

Figure 2 is a schematic top view of a bidirectional tensile stress sample stage suitable for fibrous samples.

Detailed ways

Embodiment 1: This embodiment is described in detail with reference to FIG. 2 ,

The bidirectional tensile stress micro-Raman sample stage for a fibrous sample described in this embodiment includes: a sample stage frame 27, a first tension assembly, a second tension assembly, and a set of pulley assemblies arranged inside the sample stage frame , shared stretch knob 17;

The sample stage frame 27 is a rectangular frame, preferably a metal frame. When in use, the sample stage frame 27 is placed in the placement area of the Raman spectrum acquisition system; an axis of the sample stage frame is marked as the reference axis; it is in the vertical direction of the reference axis A first scale area 12 and a second scale area 22 are arranged on the edge of a sample stage frame; the first scale area and the second scale area are symmetrically distributed with the reference axis as the center line;

The number of pulleys of the pulley block is an even number, and is arranged symmetrically along the reference axis; in some embodiments, the number of pulleys is 6, corresponding to 10, 11, 18, 25, 26 and 19 in FIG. 2 respectively;

The first stretching assembly includes: the first multi-point fixed splint 3, the first spring 14, the first multi-point fixed splint scale pointer 15, and the first spring tension scale pointer 13; one end of the first spring 14 is connected to the first multi-point At the center of the fixed splint, at the same time ensure that the first spring is perpendicular to the first multi-point fixed splint; the other end of the first spring 14 is connected to the traction wire; the first multi-point fixed splint is provided with a first multi-point fixed splint scale pointer 15 , the end of the first spring 14 connecting the traction line is provided with the first spring tension scale pointer 13; the first multi-point fixed splint scale pointer 15 and the first spring tension scale pointer 13 point vertically to the first scale area;

The second tension assembly includes: a second multi-point fixed splint 8, a second spring 21, a second multi-point fixed splint scale pointer 20, a second spring tension scale pointer 23; the first spring 14, the second spring 21 The two springs are exactly the same; the connection mode of the second multi-point fixed splint 8, the second spring 21, the second multi-point fixed splint scale pointer 20, and the second spring tension scale pointer 23 of the second tension assembly is the same as that of the second spring. The first stretch assembly is the same; the second multi-point fixed splint scale pointer 20 and the second spring stretch scale pointer 23 point vertically to the second scale area;

In some implementations, the first multi-point fixation splint 3 and the second multi-point fixation splint 8 are both three-point fixation splints.

The first stretching assembly and the second stretching assembly are symmetrically distributed with the reference axis as the center line;

The pulling wire connecting the first spring 14 and the pulling wire connecting the second spring 21 are jointly connected to the common stretching knob 17 through the pulley block, and ensure that the pulling wires are also symmetrically distributed with the reference axis as the center line;

The shared tension knob is equipped with a self-locking device, which can be locked in the state where the traction line is tensioned at the same time (no reverse rotation occurs), and manual reverse rotation can be realized (if the tensioning direction of the traction line is clockwise, the reverse Rotation is counterclockwise) to realize the installation and removal of fibrous samples.

Two multi-point fixed splints are two splints with the same mirror image on the reference axis as the center line, which is convenient for measuring multiple samples at the same time; two identical springs refer to the size, shape, material and elastic coefficient of the two tension springs It should be exactly the same, and the pull-down force at the same stretching distance is exactly the same to ensure that the left and right sides of the sample are stretched uniformly; the common stretching knob 17 is used to ensure that the left and right traction lines shrink in the same length when stretching; the double pointer is used on the left and right sides. In order to simultaneously measure the tensile length and the spring deformation length (ie the magnitude of the tensile force). The symmetrical arrangement and the same springs of the present invention ensure that the observation point does not move, the sample analysis point is in the original position, and the reliability of the analysis is improved.

Installation method: connect the first multi-point fixed splint 3 and the first spring 14, which can be welded or other connection methods. It is necessary to ensure that the spring connection point is located in the center of the multi-point fixed splint, and the second multi-point fixed splint is connected in the same way. 8 and the second spring 21;

The traction wire is preferably an inelastic traction wire; take the six wheel changers as an example in FIG. 2 for further explanation. The traction wire 16 is connected to the first spring 14, then the wire is passed around the three fixed pulleys 10, 11, 18 in turn, the traction wire 24 is connected to the second spring 21, and then the wire is passed around the three fixed pulleys 25, 26, 19 in turn , adjust the positions of the two multi-point fixed splints to align with the 0 scale of their corresponding scale areas, gently tighten (but do not stretch the spring), and use the common stretching knob to fix the traction line; at this point, the two-way tension sample stage is The installation is complete.

Actual usage method: The first multi-point fixing splint 3 and the second multi-point fixing splint 8 are both three-point fixing splints as an example for description.

If only a single sample is to be tested, that is, only one fibrous sample 5 is to be measured, first unscrew the screws 2 and 7 in the center of the two multi-point fixing splints, and insert the two ends of the fibrous sample to be tested into the center of the two multi-point fixing splints respectively. In the cavity, keep the sample taut but not stretched, and then tighten the two screws;

If two samples are to be measured at the same time, install the samples on the screws 4, 1 and 9, 6 above and below the center of the two multi-point fixed splints, respectively. If there are three samples, install them on two multi-point fixed splints respectively For the upper, middle and lower positions of the center, the installation method and precautions are the same as the single sample installation method;

Secondly, as shown in Figure 1, the biaxially stretched sample stage is located in the placement area of the complete Raman spectrum acquisition system; the Raman microscope spot is focused on the observation point, and the spectrum is ready to be collected;

Again, slowly rotate the common stretch knob 17 clockwise, when the sum of the left and right multi-point fixed splint scales (L _LJ and L _RJ ) is the desired value, stop the rotation, record the left and right spring scales (L _LT and L _RT ), and pass The formula K*(L _LJ +L _RJ -L _LT -L _RT ) calculates the current tensile force and records it; finally, the Raman spectrum data acquisition is performed.

The installation method and installation position of the device are very flexible and simple, and are widely used. It is not limited to the installation methods and positions listed in the specific embodiments, nor is it limited to a Raman spectrum acquisition platform, and is also suitable for other devices that require in-situ observation. The specific embodiment is only an explanation and description of the technical solution of the present invention, and cannot be used to limit the protection scope of the right. Any changes made according to the claims and description of the present invention are only partial changes, which should still fall within the protection scope of the present invention.

Claims (10)

1. A fibrous sample bidirectional tensile stress micro-Raman sample stage, characterized in that it comprises: a sample stage frame (27) and a first tension assembly, a second tension assembly, a Set of pulleys, shared stretch knob (17); An axis of the sample stage frame is recorded as the reference axis; a first scale area (12) and a second scale area (22) are arranged on the edge of a sample table frame in the vertical direction of the reference axis; The second scale area is symmetrically distributed with the reference axis as the center line; The number of pulleys of the pulley block is an even number, and they are arranged symmetrically along the reference axis; The first stretching assembly includes: a first multi-point fixed splint (3), a first spring (14), a first multi-point fixed splint scale pointer (15), a first spring tension scale pointer (13); a first spring One end of (14) is connected to the center of the first multi-point fixed splint; the other end of the first spring (14) is connected to the traction wire; the first multi-point fixed splint is provided with a first multi-point fixed splint scale pointer (15) , the end of the first spring (14) connected to the traction line is provided with a first spring stretched scale pointer (13); the first multi-point fixed splint scale pointer (15) and the first spring stretched scale pointer (13) point vertically to the first a scale area; The second stretching assembly includes: a second multi-point fixed splint (8), a second spring (21), a second multi-point fixed splint scale pointer (20), and a second spring tension scale pointer (23); the first The first spring (14) and the second spring (21) are two identical springs; the second multi-point fixed splint (8), the second spring (21) and the second multi-point fixed splint of the second tension assembly are scaled The connection method of the pointer (20) and the second spring tension scale pointer (23) is the same as that of the first tension assembly; the second multi-point fixed splint scale pointer (20) and the second spring tension scale pointer (23) point vertically second scale area; The first stretching assembly and the second stretching assembly are symmetrically distributed with the reference axis as the center line; The pulling wire connecting the first spring (14) and the pulling wire connecting the second spring (21) are jointly connected to the common stretching knob (17) through the pulley block, and ensure that the pulling wires are also symmetrically distributed around the reference axis. 2 . The bidirectional tensile stress micro-Raman sample stage for fibrous samples according to claim 1 , wherein the first spring is vertically arranged with the first multi-point fixing splint. 3 . 3 . The bidirectional tensile stress micro-Raman sample stage for fibrous samples according to claim 1 , wherein the second spring is vertically arranged with the second multi-point fixing splint. 4 . 4. A kind of fibrous sample bidirectional tensile stress micro-Raman sample stage according to claim 1, 2 or 3 is characterized in that, the first multi-point fixed splint and the second multi-point fixed splint are centered on the reference axis Wire mirror the same two splints. 5. A fibrous sample bidirectional tensile stress micro-Raman sample stage according to claim 4, wherein a plurality of sample mounting holes are provided on one side of the first multi-point fixing splint, and each sample mounting hole is provided with a plurality of sample mounting holes. Set screws. 6. A kind of fibrous sample bidirectional tensile stress micro-Raman sample stage according to claim 5, is characterized in that, the first multi-point fixed splint (3) and the second multi-point fixed splint (8) are all three points Fixed splint. 7 . The bidirectional tensile stress micro-Raman sample stage for fibrous samples according to claim 4 , wherein the common tension knob is provided with a self-locking device. 8 . 8 . The bidirectional tensile stress micro-Raman sample stage for fibrous samples according to claim 4 , wherein the number of pulleys in the pulley group is 6. 9 . 9 . The bidirectional tensile stress micro-Raman sample stage for fibrous samples according to claim 4 , wherein the sample stage frame ( 27 ) is a rectangular frame. 10 . 10 . The bidirectional tensile stress micro-Raman sample stage for fibrous samples according to claim 9 , wherein the sample stage frame ( 27 ) is a metal frame. 11 .

Images