CN220525698U

CN220525698U - Sample positioning device

Info

Publication number: CN220525698U
Application number: CN202321964996.9U
Authority: CN
Inventors: 陈雨; 沈治邦; 郭望果; 韩庆夫; 王焕华
Original assignee: Institute of High Energy Physics of CAS
Current assignee: Institute of High Energy Physics of CAS
Priority date: 2023-07-25
Filing date: 2023-07-25
Publication date: 2024-02-23
Anticipated expiration: 2033-07-25

Abstract

The utility model relates to the technical field of optics, and provides a sample positioning device. The sample positioning device comprises a positioning piece body, a sample pasting piece and a connecting component; the sample pasting piece is detachably arranged in the reserved space of the positioning piece body through the connecting component; the connecting assembly comprises a first connecting piece and a second connecting piece which are detachably connected; one of the first connecting piece and the second connecting piece is connected with the positioning piece body, and the other is connected with the sample pasting piece. Because locating part body and sample paste the piece and can dismantle even to and the height and the gesture of locating part body can not change, so can solve the problem that detects the sample at every turn that exists in the current experiment and all need carry out the accurate positioning to the height and the gesture of sample.

Description

Sample positioning device

Technical Field

The utility model relates to the technical field of optics, in particular to a sample positioning device.

Background

Due to the advantages of high brightness, high collimation and the like, the synchrotron radiation X-ray source can carry out experiments which cannot be carried out by the conventional laboratory X-ray source. The position and the size of the synchrotron radiation X-ray beam used in the experiment are fixed during the experiment, and the rotation center of the diffractometer is precisely positioned at the center of the X-ray beam before the experiment. The diffractometer used in the synchrotron radiation experiment station is usually a penta-circle diffractometer, and the rotation central axes of the five circles of the penta-circle diffractometer all intersect at the same point, namely the position pointed by the needle point of the angle measuring head. The positioning accuracy of this center of rotation is typically tens of microns.

Each time a new test sample is replaced, the upper surface of the sample needs to be precisely positioned to the X-ray beam center. Because the positioning in the height direction is required to be more accurate, the accuracy of a few micrometers is required to be achieved; although the positioning accuracy in the horizontal direction is not required to reach the micrometer level, it is also necessary to make the spot fall on the upper surface of the sample, so that it is necessary to perform attitude calibration on the upper surface of the sample. The conventional sample attitude calibration operation is: first, the sample is glued to an aluminum small sample table on top of the goniometer head with double sided tape, the sample surface is manually leveled to be parallel to the surface of the underlying phi-circular table, where laser, flat mirrors, etc. are required, taking one to several minutes to adjust. Then, the X-ray is utilized to level the pitch angle between the sample surface and the incident light beam, wherein the pitch angle refers to the rotation included angle of the angle measuring head, the phi-circle table surface and the sample relative to the incident light beam as a whole, and is different from the pitch angle of the angle measuring head. Finally, the height of the sample is reduced, the X-ray beam is completely transmitted from the upper part of the sample and then is incident on the detector, the count of the detector at the moment is recorded, the height of the sample is gradually scanned, the sample is enabled to block approximately half of the light intensity of the light beam, then the pitch angle of the sample is scanned, when the count of the detector is maximum when the surface of the sample is level with the light beam, the last two steps of the operation are repeated until the upper surface of the sample is enabled to be parallel to the light beam and half of the light beam can be blocked.

In summary, each time a sample is tested, the height of the sample surface and the pitch and roll angles of the sample surface need to be precisely adjusted. This is because the above three parameters are always changed when different samples are stuck with double-sided tape. And even in the case where the operator is familiar with the experimental operation, it takes five to ten minutes to manually complete the pre-experimental posture adjustment of one sample. However, the two-dimensional signal acquisition time of a typical sample is about 1-10 minutes, so that the time for switching the sample and adjusting the sample is intolerable, and the light efficiency is greatly reduced. The method for fixing the experimental samples at the internationally similar experimental stations is similar, and besides the method for adhering the experimental samples by using double faced adhesive tape and wax, a sample back suction method is also used, namely, a small air pump is used for fixing the back of the samples on a sample table in an adsorption manner. However, due to the fact that the thickness of different samples is different, the back roughness is changed, and the like, certain displacement variation is generated, and the posture of the samples is required to be finely adjusted.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the problem that when a sample to be detected is replaced, experimental efficiency is improved, and accurate positioning of the surface of the sample is guaranteed is solved.

In order to solve the technical problems, the utility model provides a sample positioning device.

The utility model provides a sample positioning device, comprising:

a reserved space for accommodating the sample pasting piece is formed in the positioning piece body;

the connecting assembly comprises a first connecting piece and a second connecting piece which are detachably connected; one of the first connecting piece and the second connecting piece is connected with the positioning piece body, and the other is connected with the sample pasting piece.

According to the sample positioning device provided by the utility model, the connecting component is a magnetic component.

According to the sample positioning device provided by the utility model, the first connecting piece comprises three first magnet groups; the second connecting piece comprises three second magnet groups; and the three first magnet groups are respectively in magnetic attraction connection with the three second magnet groups in a one-to-one correspondence manner.

According to the sample positioning device provided by the utility model, the three first magnet groups are not on the same straight line, and the three second magnet groups are not on the same straight line.

According to the sample positioning device provided by the utility model, the first magnet group or the second magnet group connected with the positioning piece body comprises a large magnet and a small magnet which are mutually magnetically connected; the large magnet is also connected with the positioning piece body, and the small magnet is used for being abutted with the sample on the sample pasting piece.

According to the sample positioning device provided by the utility model, the connecting component is a collision bead.

According to the sample positioning device provided by the utility model, the positioning piece body comprises the cover body, and the cover body is provided with the light holes; the light hole is communicated with the reserved space, and the light hole is used for enabling light reflected by the sample to pass out of the positioning piece body.

According to the sample positioning device provided by the utility model, the positioning piece body further comprises a bottom plate and two side plates which are parallel to each other and are arranged at intervals;

the bottom ends of the two side plates are connected with the bottom plate, and the top ends of the two side plates are connected with the cover body; the bottom plate, the two side plates and the cover body are enclosed to form the reserved space.

According to the sample positioning device provided by the utility model, the positioning piece body further comprises a positioning connecting piece, and the positioning connecting piece is arranged outside the reserved space and is connected with the bottom plate.

According to the sample positioning device provided by the utility model, the cover body comprises a first cover plate and a second cover plate; the first cover plate is connected with the top end of one side plate, the second cover plate is connected with the top end of the other side plate, and gaps are reserved at two opposite ends of the first cover plate and the second cover plate and used for forming the light holes.

According to the sample positioning device provided by the utility model, the sample pasting piece comprises a plexiglass plate, and the plexiglass plate is connected with the first connecting piece or the second connecting piece.

According to the sample positioning device provided by the utility model, the sample positioning device further comprises a shielding piece connected to the cover body; the shielding piece is provided with a reserved gap, and the reserved gap is communicated with the light hole.

According to the sample positioning device provided by the utility model, the shielding piece comprises a first shielding plate and a second shielding plate which are arranged at intervals; the reserved gap is formed between two opposite side surfaces of the first shielding plate and the second shielding plate.

According to the sample positioning device provided by the utility model, the sample positioning device further comprises a sealing piece for sealing or opening the reserved gap, and the sealing piece is detachably connected with the shielding piece.

The utility model provides a sample positioning device. When the sample positioning device is used for the first time, the height and the posture of the sample on the sample pasting piece are required to be adjusted to meet the experimental requirements by adjusting the height and the posture of the positioning piece body, and then the sample is detected. Because the locating piece body is detachably connected with the sample pasting piece, the purpose of quickly replacing the sample can be achieved. In addition, the height and the gesture of the positioning piece body are not changed due to the replacement of the sample pasting piece, so that the sample positioning device does not need to accurately position the gesture and the height of the sample every time the sample is replaced, and the problem that the height and the gesture of the sample need to be accurately positioned every time the sample is detected in the existing experiment is effectively solved.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a sample positioning device according to the present utility model;

FIG. 2 is a schematic perspective view of the retainer body of FIG. 1 in one view;

FIG. 3 is a schematic perspective view of the structure of FIG. 2 in another view;

fig. 4 is a schematic view of the sample application member of fig. 1 with a sample removed.

Reference numerals:

11. a positioning member body; 12. sample adhesive piece: 13. a connection assembly; 14. a shield;

111. reserving a space; 112. a cover body; 113. a bottom plate; 114. a side plate; 115. positioning the connecting piece; 131. a first connector; 132. a second connector; 141. a first shielding plate; 142. a second shielding plate; 143. reserving a gap;

1121. a first cover plate; 1122. a second cover plate; 1123. light holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A sample positioning device of the present utility model is described below in conjunction with fig. 1-4. As shown in fig. 1, the sample positioning device includes a positioning member body 11, a sample application member 12, and a connecting assembly 13; a reserved space 111 for accommodating the sample application member 12 is formed in the positioning member body 11; the connection assembly 13 includes a first connection member 131 and a second connection member 132 detachably connected; one of the first and second connection members 131 and 132 is connected to the positioning member body 11, and the other is connected to the sample application member 12. When the sample application member 12 is detachably connected to the positioning member body 11 by the connecting member 13, the sample application member 12 is positioned in the head space 111. In the present embodiment, the number and form of the connection members 13 are not limited, and for example, the number of the connection members 13 may be one or more. The connecting component 13 may be a magnetic component, or may be other components with detachable connection functions, such as a ball. The function of the connecting assembly 13 is, on the one hand, to achieve a detachable connection of the holder body 11 to the sample application member 12 and, on the other hand, to ensure a stable connection of the sample application member 12 to the holder body 11.

When the positioning device is used for detecting a sample for the first time, the sample pasting piece 12 coated with the sample is connected with the positioning piece body 11, and then an experimenter adjusts the height and the gesture of the positioning piece body 11 to enable the height and the gesture of the sample to meet experimental requirements, and then the sample is detected. After the test is completed, the sample application member 12 is replaced, and the next test sample is performed. When the detection of the next sample is carried out, the height and the posture of the positioning piece body 11 do not need to be adjusted, because once the height and the posture of the positioning piece body 11 are adjusted, the height and the posture of the sample on the replaced sample pasting piece 12 can be kept consistent with those of the previous sample, namely the height and the posture of the sample do not need to be adjusted every time, and the problem that the height and the posture of the sample need to be accurately positioned every time the sample is detected in the existing experiment is solved. And the sample pasting piece 12 is detachably connected with the positioning piece body 11 through the connecting component 13, so that the purposes of rapidly replacing a sample to be tested and improving experimental efficiency can be realized.

In a specific embodiment, the first connecting member 131 includes three first magnet sets, the second connecting member 132 also includes three second magnet sets, and the three first magnet sets are magnetically connected to the three second magnet sets, respectively.

In view of connection stability, in the present embodiment, the three first magnet groups are not on the same straight line; and the three second magnet groups are not on the same straight line. When in use, the three first magnet groups and the three second magnet groups are in one-to-one correspondence and are mutually magnetically connected. The fact that none of the three first magnet groups and the three second magnet groups are on the same straight line is based on the principle that one plane is determined by three points, so that once the height and the posture of the positioning member body 11 are fixed, the height and the posture of the sample on the sample pasting member 12 detachably connected with the positioning member body 11 are fixed, and the sample cannot be changed due to the change of the thickness and the like of the sample. Preferably, the connecting lines of the three first magnet groups form an isosceles right triangle, and the connecting lines of the corresponding three second magnet groups also form an isosceles right triangle, so that on one hand, the mounting is convenient, and on the other hand, the sample pasting piece 12 can be more stably and detachably mounted on the positioning piece body 11.

In a specific embodiment, the first magnet group or the second magnet group connected with the positioning piece body 11 comprises a large magnet or a small magnet which are mutually magnetically connected; the large magnet is also connected with the positioning member body 11, and the small magnet is abutted against the sample on the sample sticking member 12.

Specifically, when the first magnet groups are connected with the positioning member body 11, each first magnet group includes a large magnet and a small magnet that are magnetically connected with each other; the large magnet is also connected with the positioning piece body 11, and the small magnet is in magnetic attraction connection with the second magnet group while being in contact with the sample on the sample sticking piece 12. Because the small magnet is in contact with the sample, the contact area between the first connector 131 and the sample can be reduced, so that more sample is exposed to the environment to be measured.

In the present embodiment, the large magnet is preferably a magnet having a cross-sectional diameter of 2mm, and the small magnet is preferably a magnet having a cross-sectional diameter of 1mm, in view of the magnitude of the magnetic force. And the large magnet and the small magnet are preferably magnets with the model number of N52. Correspondingly, the second magnet group is preferably a magnet with a cross-section diameter of 2mm, and the purpose is to be able to be connected with the first magnet group by stable magnetic attraction, and the type is preferably a magnet of N52.

Or, when the second magnet groups are connected with the positioning member body 11, each second magnet group includes a large magnet and a small magnet magnetically connected with each other; the large magnet is also connected with the positioning member body 11, and the small magnet is magnetically attracted with the first magnet group while being in contact with the sample on the sample pasting member 12.

In a specific implementation, the positioning member body 11 includes a cover 112, and a light hole 1123 is formed on the cover 112; the light hole 1123 is communicated with the reserved space 111, and is used for allowing the light reflected by the sample to pass out of the positioning member body 11. When the sample sticking member 12 is detachably mounted on the positioning member body 11, the sample on the sample sticking member 12 is positioned below the light transmitting hole 1123, and the light reflected by the sample can pass out of the positioning member body 11 from the light transmitting hole 1123. The shape of the light-transmitting hole 1123 may be circular, square, polygonal, or elongated. The formation of the light-transmitting holes 1123 is not limited.

As shown in fig. 2 and 3, the positioning member body 11 further includes a bottom plate 113, and two side plates 114 arranged parallel to each other and spaced apart;

the bottom ends of the two side plates 114 are connected with the bottom plate 113, the top ends are connected with the cover 112, and the bottom plate 113, the two side plates 114 and the cover 112 enclose to form a reserved space 111. The headspace 111 is preferably a rectangular space, and the front and rear sides of the headspace 111 are directly communicated with the outside.

The positioning member body 11 further includes a positioning connector 115, where the positioning connector 115 is disposed outside the reserved space 111 and connected to the bottom plate 113. In using the sample positioning device of the present embodiment, the positioning connector 115 is fixedly connected to the sample stage.

In the present embodiment, the cover 112 includes a first cover plate 1121 and a second cover plate 1122; the first cover plate 1121 is connected to the top end of one side plate 114, the second cover plate 1122 is connected to the top end of the other side plate 114, and a gap is left between two opposite end surfaces of the first cover plate 1121 and the second cover plate 1122 for forming a light hole 1123. Preferably, for ease of handling the sample application member 12, the first cover plate 1121 is rectangular in configuration and the second cover plate 1122 is trapezoidal in configuration. Alternatively, the first cover plate 1121 and the second cover plate 1122 are each of a trapezoid structure. In this embodiment, two first magnet sets are fixedly mounted on the first cover plate 1121, another first magnet set is fixedly mounted on the second cover plate 1122, and three first magnet sets are all located in the reserved space 111, and the connection lines of the three first magnet sets form an isosceles right triangle. Correspondingly, three second magnet sets are fixedly mounted on the sample attachment member 12, and the connecting lines of the three second magnet sets form an isosceles right triangle.

In a specific embodiment, as shown in fig. 4, the sample application member 12 comprises a plexiglass plate fixedly attached to either the first connector 131 or the second connector 132.

In a specific embodiment, the sample positioning device further comprises a shield 14 attached to the cover 112; the shielding member 14 is formed with a reserved gap 143, and the reserved gap 143 is vertically disposed and is communicated with the light hole 1123 and the reserved space 111. The shielding piece 14 is used for shielding air scattering light, can effectively filter unnecessary air scattering, reduces the back noise signal on the detector reaching the sample detection experiment station body, and improves the quality of data signals.

Wherein the shield 14 includes a first shield plate 141 and a second shield plate 142 which are all disposed at intervals; a reserved gap 143 is formed between opposite side surfaces of the first and second shield plates 141 and 142. In the present embodiment, the first shielding plate 141 is preferably fixedly connected to the first cover plate 1121, and the second shielding plate 142 is preferably fixedly connected to the second cover plate 1122.

In a specific embodiment, the sample positioning device further comprises a closure; the closure is detachably connected to the shielding 14 for closing or opening the reserved gap. In some experimental modes, the preformed gap needs to be closed with a closure to reduce the scattering effect of air, because the angle of incidence of the X-rays is very small. In some experimental modes, however, the X-rays need not be blocked by a closure member because the angle of incidence of the X-rays is relatively large. Therefore, the application scene of the sample positioning device of the embodiment is increased, and the application range of the sample positioning device is widened.

In this embodiment the shielding 14 is preferably an iron plate and the corresponding closure is preferably a magnet, so that the purpose of opening or closing the reserved gap can be achieved by magnetic attraction and loss of the closure is also avoided.

When the X-ray synchronous radiation X-ray diffraction instrument is used, first, the rotation central axes of the five circles of the five-circle diffraction instrument are intersected at the same point, namely the position pointed by the needle point on the angle measuring head, and meanwhile, the X-ray emitted by the X-ray synchronous radiation X-ray source emitter is also coincident with the center of the five-circle diffraction instrument. Then, the sample to be measured is placed on a sample stage of the angle measuring head (namely, the position of the needle point), and the posture and the height of the sample are adjusted by adjusting the angle measuring head, so that the height and the posture of the sample meet the experimental requirements. Finally, the sample reflects the X-ray beam to the detector, and the detector receives and processes the signal to obtain the detection data of the sample.

In this embodiment, the positioning member body 11 of the sample positioning device is fixedly connected with the goniometer head. Specifically, the positioning connector 115 of the positioning member body 11 is fixedly connected with the sample stage of the goniometer head. The height and posture of the positioning member body 11 can be changed by adjusting the goniometer head. Also, since the sample application member 12 is detachably mounted on the positioning member body 11, the height and posture of the sample can be fixed by the positioning member body 11. That is, once the height and posture of the positioning member body 11 are fixed, even if a different sample application member 12 is replaced, there is no need to readjust the height and posture of the positioning member body 11. Therefore, the problems that the height and the gesture of the sample need to be accurately positioned every time the sample is detected in the experiment in the prior art and the experiment efficiency is low are solved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A sample positioning device, comprising:

a positioning member body (11) in which a reserved space (111) for accommodating the sample application member (12) is formed;

a connection assembly (13) comprising a first connection member (131) and a second connection member (132) detachably connected; one of the first connecting member (131) and the second connecting member (132) is connected to the positioning member body (11), and the other is connected to the sample application member (12).

2. A sample positioning device according to claim 1, wherein the connection assembly (13) is a magnetic attraction assembly.

3. The sample positioning device according to claim 2, wherein the first connector (131) comprises three first magnet sets; the second connector (132) comprises three second magnet sets; and the three first magnet groups are respectively in magnetic attraction connection with the three second magnet groups in a one-to-one correspondence manner.

4. A sample positioning device as recited in claim 3, wherein the three first magnet sets are not collinear and the three second magnet sets are not collinear.

5. A sample positioning device according to claim 3, characterized in that the first or second set of magnets connected to the positioning member body (11) comprises a large magnet and a small magnet magnetically connected to each other; the large magnet is connected with the positioning piece body (11), and the small magnet is used for being abutted with a sample on the sample pasting piece (12).

6. The sample positioning device according to any one of claims 1-5, wherein the positioning member body (11) comprises a cover body (112), and a light transmission hole (1123) is formed in the cover body (112); the light transmission hole (1123) is communicated with the reserved space (111), and the light transmission hole (1123) is used for allowing light reflected by a sample to pass through the positioning piece body (11).

7. The sample positioning device according to claim 6, wherein the positioning member body (11) further comprises a bottom plate (113), and two side plates (114) arranged parallel to each other and spaced apart;

the bottom ends of the two side plates (114) are connected with the bottom plate (113), and the top ends are connected with the cover body (112); the bottom plate (113), the two side plates (114) and the cover body (112) are enclosed to form the reserved space (111).

8. The sample positioning device according to any of claims 1-5, wherein the sample application member (12) comprises a plexiglass plate, which plexiglass plate is connected to the first connecting member (131) or the second connecting member (132).

9. The sample positioning device of claim 6, further comprising a shield (14) attached to the cover (112); a reserved gap (143) is formed on the shielding piece (14), and the reserved gap (143) is communicated with the light hole (1123).

10. Sample positioning device according to claim 9, characterized in that the sample positioning device further comprises a closure for closing or opening the reserved gap (143), which closure is detachably connected with the shielding (14).