CN220525696U - Clamp for scanning vertebrate fossil packaged by foam for industrial CT - Google Patents

Abstract

The utility model relates to the technical field of industrial CT scanning, in particular to a clamp for scanning vertebrate fossil packaged by foam for industrial CT. The fixture comprises: the scanning device comprises a base and a plurality of auxiliary fixing pieces, wherein the base is arranged on an objective table of the scanning device, and the auxiliary fixing pieces are arranged on the base and used for supporting an object to be scanned. The utility model has at least one of the following advantages and positive effects: (1) According to the clamp made of the carbon fiber, the density of the carbon fiber is far lower than that of fossil, and the gray value of a detected object can be effectively highlighted; (2) On the premise of not damaging the package, the method ensures that the fossil can be effectively fixed in the scanning process, and the minimum rotation radius of the fossil can be found out, so that scanning data with higher quality and higher precision can be obtained; (3) Protecting the fossil from damage during loading and removal.

Description

Clamp for scanning vertebrate fossil packaged by foam for industrial CT

Technical Field

The utility model relates to the technical field of industrial CT scanning, in particular to a clamp for scanning vertebrate fossil packaged by foam for industrial CT.

Background

The working principle of the industrial CT is as follows: when the X-ray is incident on the object, a part of the X-ray is absorbed, a part of the X-ray is scattered, and a part of the X-ray is transmitted through the object. If the detected objects are uniform and have no difference in structure, the transmitted X-ray intensity is uniform; if the detected object is uneven or has structural difference, the detected object changes the uniformity of X-ray projection to make the detected object uneven. The detector is used for detecting the intensity of the transmitted X-rays, so that the structural difference, the size and the property of the detected object can be displayed. In general, the higher the density of the object to be detected, the higher the detected gradation value, and the lower the density, the lower the detected gradation value. According to the different densities of the detected objects, the information such as the internal structure, the pores and the like of the detected objects can be identified nondestructively and rapidly.

The X-ray tube of nikon XTH225ST industrial CT is a fixture, and the object to be detected needs to be mounted and fixed on the stage by a fixture when the instrument performs three-dimensional scanning. In the scanning process, the detected object integrally rotates for 360 degrees, 3142X-ray two-dimensional images are obtained, 3141 images are two-dimensional images shot in the 360-degree rotation process, and 3142 images are shot at an initial angle after the detected object rotates for 360 degrees. After the scanning is completed, the three-dimensional reconstruction software compares the 1 st image with the 3142 th image and then reconstructs, the higher the coincidence degree is, the higher the quality of the reconstructed three-dimensional image is, that is, the sample is kept not to shake in the scanning process, the 1 st image and the 3142 th image are kept to be completely coincident, and high-quality reconstruction data can be obtained.

The magnification of the CT scan is equal to the distance of the tube from the detector divided by the distance of the sample from the tube, assuming that the distance of the tube from the detector is a, the position of the sample from the tube is B, the magnification=a/B of the sample scan, and on the premise that the detector receives the complete information of the scanned object, the closer the scanned object is to the tube, the larger the magnification thereof is. The more centered it is mounted on the fixture, the smaller the radius of rotation it achieves when rotated, the closer the sample is to the tube, and the higher the scan accuracy it achieves. That is, the more centered the position mounted on the jig, i.e., the smaller the radius of rotation obtained upon 360 degree rotation, the higher the scan quality and accuracy obtained for the same object under test is.

Since the internal structure of the detected object can be observed rapidly and nondestructively by the micro-CT, the micro-CT is widely applied to the research fields of ancient human and ancient fossil, in particular to some vertebrate fossil, and bone morphology can be reconstructed and fossil information hidden in the rock can be found by CT scanning. Some precious, rare and high-value fossils are usually engraved with grooves on thick foam according to the morphology of the fossils, and then the fossils are wrapped. In the scanning process, in order to avoid the fossil from being damaged, the fossil is usually scanned on machine together with the package. In the prior art, the method generally used is to directly adhere the foam-packaged fossil to the self-contained disc-type clamp of the instrument by double-sided adhesive.

In the prior art, since no special sample table or clamp is used for installing the samples, fossil is usually stuck on the clamp by using double-sided adhesive, which easily causes the reduction of scanning quality due to the fact that the double-sided adhesive is not firm and moves due to uneven foam bottom surface in the rotating process of the samples; meanwhile, when a sample is fixed by using the double faced adhesive tape, the minimum rotation radius is difficult to find once, the adhesiveness is reduced in the process of disassembling and repositioning the sample, the position is moved in the scanning process, and the scanning quality is reduced.

For this purpose we propose a fixture for fossil scanning of vertebrates, packed with industrial CT foam.

Disclosure of Invention

It is a primary object of the present utility model to overcome at least one of the deficiencies of the prior art and to provide a foam-packaged vertebrate fossil scanning jig for industrial CT.

In order to realize the technical scheme, the utility model adopts the following technical scheme:

according to one aspect of the present utility model, there is provided a fixture for fossil scan of vertebrates in industrial CT foam package, comprising:

the base is arranged on the object stage of the scanning equipment;

and the auxiliary fixing pieces are arranged on the base and used for supporting an object to be scanned.

According to an embodiment of the present utility model, the auxiliary fixing member has a conical shape or a cylindrical shape.

According to one embodiment of the utility model, the auxiliary fixing element is a fixing needle.

According to one embodiment of the utility model, the base is fixed to the stage by a support rod.

According to one embodiment of the present utility model, the susceptor has a disk shape.

According to an embodiment of the utility model, the base is arranged coaxially with the support rod.

According to an embodiment of the present utility model, the auxiliary fixing member is made of carbon fiber.

According to the technical scheme, the utility model has at least one of the following advantages and positive effects:

(1) According to the clamp made of the carbon fiber, the density of the carbon fiber is far lower than that of fossil, and the gray value of a detected object can be effectively highlighted;

(2) On the premise of not damaging the package, the method ensures that the fossil can be effectively fixed in the scanning process, and the minimum rotation radius of the fossil can be found out, so that scanning data with higher quality and higher precision can be obtained;

(3) Protecting the fossil from damage during loading and removal.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.

Fig. 1 is a schematic structural view of a foam-packaged vertebrate fossil scanning jig for industrial CT according to the present utility model.

The reference numerals are explained as follows:

1-base, 2-support stick, 3-auxiliary fixing piece.

Detailed Description

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. The positional or state relationships indicated by the terms "inner", "outer", "upper", "lower", etc. are based on the positional or state relationships shown in the drawings, are merely for convenience in describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model is understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein.

The utility model is described in further detail below with reference to the drawings and the detailed description.

Referring to fig. 1, fig. 1 is a schematic structural view of a foam-packaged vertebrate fossil scanning jig for industrial CT according to the present utility model. The utility model relates to a clamp for scanning vertebrate fossil packaged by industrial CT foam, which comprises a base 1, a support rod 2 and auxiliary fixing pieces 3, wherein the base 1 is arranged on an objective table of scanning equipment, the auxiliary fixing pieces 3 are arranged on the base 1 and used for supporting an object to be scanned, and the base 1 is fixed on the objective table through the support rod 2. Wherein the diameter of the support rod 2 is 3cm.

In this embodiment, the auxiliary fixing member 3 is conical, and further, the auxiliary fixing member 3 is a fixing needle. The design of the fixed needle can fully contact with fossil as much as possible, effectively transfer the weight of fossil to the base 1 through a plurality of fixed needles, and improve the stability, safety and reliability. Meanwhile, the auxiliary fixing piece 1 is made of carbon fiber materials, and in three-dimensional reconstruction, the gray value of the carbon fiber materials is close to that of air, so that the gray value of fossil can be effectively highlighted.

In this embodiment, the base 1 is disc-shaped, and the base 1 and the support rod 2 are coaxially disposed, so that the radius of rotation of the object to be scanned can be reduced.

The utility model relates to a sample loading mode of a clamp for scanning vertebrate fossil packaged by industrial CT foam, which comprises the following steps:

firstly, sticking a layer of double faced adhesive tape on the bottom of a fossil of a foam package;

secondly, slowly and stably placing fossil on the fixed needle, wherein the rotation center of the fossil is as close to the rotation center of the base 1 as possible or coincides with the rotation center of the base 1;

the top of the fixing needle penetrates into the inside of the foam by applying an external force to the fossil of the foam package. The double fixing mode of the fixing needle prepared by the double faced adhesive tape and the carbon fiber can effectively ensure that fossil does not move in the scanning and rotating process.

In summary, in the clamp made of carbon fiber materials, in the three-dimensional reconstruction, the gray value of the carbon fiber is close to that of air, so that the gray value of fossil can be effectively highlighted; due to the adoption of the double-faced adhesive tape and carbon fiber needle dual-fixing mode, a smaller rotating radius can be effectively found, the scanning precision of the fossil can be ensured, the fossil can not move in the rotating process, the data scanning quality can be ensured, and the precious vertebrate fossil can be prevented from being damaged in the mounting and dismounting processes.

It is to be understood that the utility model is not limited in its application to the details of construction and the arrangement of components set forth herein. The utility model is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are intended to fall within the scope of the present utility model. It should be understood that the utility model disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. The embodiments described herein illustrate the best mode known for carrying out the utility model and will enable those skilled in the art to utilize the utility model.

Claims (5)

1. A foam-wrapped vertebrate fossil scanning jig for industrial CT, comprising:

the base is arranged on the object stage of the scanning equipment;

the auxiliary fixing pieces are arranged on the base and used for supporting an object to be scanned;

the auxiliary fixing piece is conical or cylindrical, and is made of carbon fiber materials.

2. The industrial CT foam packaged vertebrate fossil scan jig of claim 1, wherein said auxiliary fixture is a fixture needle.

3. The industrial CT foam-wrapped vertebrate fossil scan jig according to claim 1, wherein said base is secured to the stage by support rods.

4. A foam-packaged vertebrate fossil scanning jig according to claim 3 wherein said base is disc-shaped.

5. A foam-packaged vertebrate fossil scanning jig according to claim 3 wherein said base is arranged coaxially with the support bar.