CN116337664A - Multi-point indentation device, system and test method for soft material - Google Patents
Multi-point indentation device, system and test method for soft material Download PDFInfo
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- CN116337664A CN116337664A CN202310223466.7A CN202310223466A CN116337664A CN 116337664 A CN116337664 A CN 116337664A CN 202310223466 A CN202310223466 A CN 202310223466A CN 116337664 A CN116337664 A CN 116337664A
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- translation table
- point indentation
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- 238000007373 indentation Methods 0.000 title claims abstract description 54
- 239000007779 soft material Substances 0.000 title claims abstract description 31
- 238000010998 test method Methods 0.000 title description 4
- 238000013519 translation Methods 0.000 claims abstract description 85
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 239000000523 sample Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 14
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 4
- 108010010803 Gelatin Proteins 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000017 hydrogel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 108010082117 matrigel Proteins 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/062—Special adaptations of indicating or recording means with mechanical indicating or recording means
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a multi-point indentation device, a system and a testing method for soft materials. The multi-point indentation system comprises an electric control translation table, a multi-point indentation device, a multi-hole support base and an optical platform, wherein the electric control translation table comprises an X-axis translation table, a Y-axis translation table and a Z-axis translation table, the Z-axis translation table is vertically arranged on the optical platform, the X-axis translation table is parallelly arranged on the optical platform, the Y-axis translation table is arranged on the X-axis translation table, the multi-hole support base is arranged on the Y-axis translation table, and the multi-point indentation device is arranged on the Z-axis translation table. The invention can realize simultaneous measurement of multiple groups of samples, and avoid time errors caused by waiting for testing of other samples or a great amount of experimental time lost by preparing the samples one by one. Meanwhile, after the test of the same position of all samples is completed according to the determined proper distance, the ball screw of the electric control translation stage is accurately moved to the required distance, so that time is saved, and the test precision is ensured.
Description
Technical Field
The invention relates to the technical field of soft materials, in particular to a multi-point indentation device, a multi-point indentation system and a multi-point indentation test method for soft materials.
Background
The physical and chemical properties of soft materials are important points of attention for scientific researchers. For some viscoelastic hydrogel materials with poor strength (such as sodium alginate with low concentration, gelatin and the like), a nano-indentation instrument is commonly used internationally for measuring the Young modulus of the material. The existing nanoindentation instrument obtains displacement-force data through a force sensor, and then can be tested according to a Hertz model or other mathematical models. The nanoindentation instruments currently used by international researchers typically test only one location of a single sample at a time. To eliminate random errors requires that each sample has to measure data at multiple locations for reliability, and measurement experiments also require at least 3 and more samples to ensure data reliability. Thus, when samples are measured sequentially in sequence, over time, large errors can occur for materials that are subject to temperature or cross-linking time (e.g., gelatin, matrigel, etc.). For this reason, a new multi-point indentation apparatus is designed to measure a plurality of samples simultaneously to reduce errors. When calculating data for a plurality of locations on the same sample using a mathematical model, it is required that the locations need to be spaced apart by a certain distance. If manual movement is adopted, errors are easy to occur, and an automatic device is required to move. In summary, it is important to design a multi-point indentation device and system for simultaneous measurement of multiple samples.
Disclosure of Invention
The invention aims to provide a multi-point indentation device, a multi-point indentation system and a multi-point indentation test method for soft materials, which are used for overcoming the defects in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a multiple spot indentation device for soft material, includes integral type supporting seat, draws pressure sensor, probe and pressure head, integral type supporting seat includes the supporting seat body, the middle part of supporting seat body is equipped with the supporting seat through-hole, the outside of supporting seat body is equipped with the bracing piece, draw pressure sensor to locate every on the bracing piece, the probe is located on the pressure sensor that draws, the lower extreme of probe is located to the pressure head.
Further, the pull pressure sensor is detachably arranged on the support rod.
Further, the supporting seat body is of a square structure, the supporting seat through holes are square holes, and supporting rods are arranged on four outer side faces of the supporting seat body of the square structure.
Further, the supporting rod is of a U-shaped structure.
The invention also provides a multi-point indentation system for soft materials, which comprises an electric control translation stage, the multi-point indentation device, a multi-hole support base and an optical platform, wherein the electric control translation stage comprises an X-axis translation stage, a Y-axis translation stage and a Z-axis translation stage, the Z-axis translation stage is vertically arranged on the optical platform, the X-axis translation stage is parallelly arranged on the optical platform, the Y-axis translation stage is arranged on the X-axis translation stage, the multi-hole support base is arranged on the Y-axis translation stage, and the multi-point indentation device is arranged on the Z-axis translation stage.
Further, the porous support base comprises a base body, and the mounting holes on the base are used as the trough and are provided with scale marks for ensuring that a plurality of samples are at the same height.
Further, the number of the Z-axis translation stages is two, and the two Z-axis translation stages are connected with each other through a fastener.
Further, the device also comprises a PLC control circuit connected with the electric control translation stage.
The invention also provides a method for the multi-point indentation system for soft materials, which comprises the following steps:
s1, placing a sample on a porous support base, and ensuring that the height of the sample is in the same scale line of a trough;
s2, controlling the X-axis translation stage and the Y-axis translation stage to move, and moving the sample to a set first position;
s3, controlling the Z-axis translation stage to drive the multi-point indentation device to move downwards to contact with the sample, continuously moving downwards to a set position, then lifting back, and collecting a first group of data by the tension pressure sensor;
s4, repeatedly executing the steps S2-S3 until data acquisition of n positions is completed, and forming second to nth groups of data;
s5, transmitting the first to nth groups of data to the terminal.
Compared with the prior art, the invention has the advantages that: the multipoint indentation device for soft materials is simple and portable, samples cannot interfere with each other, and the multipoint indentation device can be expanded and replaced according to the needs at any time; the multi-point indentation system for soft materials can realize simultaneous measurement of multiple groups of samples, and avoid a great amount of experimental time caused by time errors of waiting for testing of other samples or sample-by-sample preparation loss. Meanwhile, according to the determined proper distance, after the test of the same position of all samples is completed, the ball screw of the electric control translation stage can be accurately moved to the required distance. Meanwhile, the graduation marks are set on the multi-hole auxiliary clamp, so that the samples can be ensured to be at the same height, and errors caused by inconsistent heights of the samples can be avoided. Therefore, the invention saves time and ensures the test precision.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the multi-point indentation system for soft materials of the present invention.
Fig. 2 is a schematic structural view of the multi-point indentation apparatus for soft materials of the present invention.
In fig. 3, a and b are schematic structural diagrams of the integrated supporting base and probe, respectively.
Fig. 4 a, b and c are perspective, front and top views, respectively, of a porous support base of the present invention.
In the figure: the electronic control translation table 1, the multi-point indentation device 2, the porous support base 3, the optical platform 4, the integrated support base 5, the fastening piece 6, the tension and pressure sensor 7, the probe 8, the pressure head 9, the base body 30, the base through hole 31, the mounting hole 32, the support base body 50, the support rod 51 and the support base through hole 52
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Referring to fig. 2, the embodiment discloses a multi-point indentation device for soft materials, which comprises an integrated supporting seat 5, a tension and pressure sensor 7, a probe 8 and a pressure head 9, wherein the integrated supporting seat 5 comprises a supporting seat body 50, a supporting seat through hole 52 is arranged in the middle of the supporting seat body 50, supporting rods 51 are arranged on the outer side of the supporting seat body 50, the tension and pressure sensor 7 is arranged on each supporting rod 51, the probe 8 is arranged on the tension and pressure sensor 7, and the pressure head 9 is arranged at the lower end of the probe 8.
In this embodiment, the pull pressure sensor 7 is mounted on the support rod 51 by a fastener 6.
In this embodiment, the supporting seat body 50 has a square structure, the supporting seat through hole 52 has a square hole, and the four outer sides of the supporting seat body 50 having a square structure are respectively provided with a supporting rod 51.
Preferably, the support rod 51 has a U-shaped structure.
Referring to fig. 1, the present invention further provides a multi-point indentation system for soft materials, which includes an electric control translation stage 1, the multi-point indentation device 2, a multi-hole support base 3 and an optical platform 4, wherein the electric control translation stage 1 includes an X-axis translation stage, a Y-axis translation stage and a Z-axis translation stage, the Z-axis translation stage is vertically installed on the optical platform 4, the X-axis translation stage is parallelly installed on the optical platform 4, the Y-axis translation stage is installed on the X-axis translation stage, the multi-hole support base 3 is installed on the Y-axis translation stage, and the multi-point indentation device 2 is installed on the Z-axis translation stage.
Referring to fig. 3, the porous support base 3 includes a base body 30, wherein a base through hole 31 is formed in the middle of the base body 30, a mounting hole 32 is further formed in the base body 30, the mounting hole 32 corresponds to the support rod 51, and the multi-point indentation device 2 is located above the base through hole 31 of the porous support base 3.
The porous support base 3 needs to hold a sample and make the probe of the multi-point indentation device 2 contact the sample, and the porous support base 3 needs to be fixed on the Y-axis translation stage. The shape of the mounting hole 32 varies depending on the shape of the test sample. Here, the mounting hole 32 was designed with a circular dish having a diameter of 35mm as a sample size. The mounting hole is used as a trough and is provided with scale marks so as to ensure that all samples are at the same height. Meanwhile, a threaded hole is formed in the base body 30 for connection with the Y-axis translation stage.
In this example, to provide support for 8 samples, a multi-well support base 3 is designed as shown in FIG. 4. Here, a sample prepared using a circular dish having a diameter of 35mm (sample diameter 35mm, thickness not less than 2 mm) was used. The porous support base 3 is mounted on 4Y-axis translation stages by bolts, whereby accurate movement to a proper position as required when taking measurements can be achieved. At the same time, the size can be modified to measure more samples or samples of different sizes according to actual needs.
In this embodiment, the number of the Z-axis translation stages is two, and the two Z-axis translation stages are connected to each other by a fastener.
The embodiment also comprises a PLC control circuit connected with the electric control translation stage 1, so that the action of the electric control translation stage 1 can be automatically controlled.
The invention provides an assembling method for multipoint indentation of soft materials, which comprises the following steps:
step 1: the 2 single-axis electric control translation stages are installed in the Z-axis direction (namely, the direction vertical to the optical platform) by bolts and serve as Z-axis translation stages, and the 2Z-axis translation stages are mutually fixed by bolts.
Step 2: first a translation stage on one side is installed. And 1 electric control translation stage is used as an X-axis translation stage, the X-axis translation stage is arranged on the optical platform 4, and after the installation is completed, the other electric control translation stage is arranged on the X-axis electric control translation stage to form a Y-axis electric control translation stage.
Step 3: the other 3-sided translation stage is installed according to the method of step 2.
Step 4: the porous support base 3 is mounted on the Y-axis translation stage by bolts.
Step 5: and assembling the multipoint indentation device 2, and installing the multipoint indentation device with the Z-axis translation table through bolts after the assembling is completed.
Thus, a multi-point indentation system for soft materials is formed, and the Young modulus of the soft materials can be tested.
The invention also provides a method for a multi-point indentation system for soft materials, comprising the steps of:
s1, pouring materials of 8 samples into a round culture dish with the diameter of 35mm, and enabling the diameter of the samples to be 35mm and the thickness to be 4mm. The 8 samples are placed on the porous support base 3, and all samples are ensured to meet the design height through scale marks on the support base. The sample is crosslinked under the crosslinking conditions of a certain temperature, a crosslinking agent and the like;
and S2, controlling the X-axis translation stage and the Y-axis translation stage to move by utilizing a PLC control circuit, and moving 8 samples to a set first position.
And S3, controlling the two Z-axis translation stages to drive the multi-point indentation device 2 to move downwards to contact with the sample by utilizing the PLC control circuit, continuously moving downwards to a set position, then lifting the sample back, and pulling the pressure sensor to acquire a first group of data.
Step S4, repeatedly executing the steps S2-S3 until the data acquisition of n positions is completed, and forming second to nth groups of data, for example: at this time, the PLC control circuit is used to control the stepper motor to move the X, Y axis translation stage at the 4-position, so as to move the sample to the set second position, and the 2Z axis translation stages are driven by the stepper motor to move the parallel test device downwards to contact with the sample and continuously move downwards and lift. Thereafter, the test for each position of the 8 samples was moved by the designed horizontal distance, and at least 9 points were tested.
Step S5, the first group data to the nth group data are transmitted to the computer terminal.
The multipoint indentation device for soft materials is simple and portable, samples cannot interfere with each other, and the multipoint indentation device can be expanded and replaced according to the needs at any time; the multi-point indentation system for soft materials can realize simultaneous measurement of multiple groups of samples, and avoid a great amount of experimental time caused by time errors of waiting for testing of other samples or sample-by-sample preparation loss. Meanwhile, according to the determined proper distance, after the test of the same position of all samples is completed, the ball screw of the electric control translation stage can be accurately moved to the required distance. Meanwhile, the graduation marks are set on the multi-hole auxiliary clamp, so that the samples can be ensured to be at the same height, and errors caused by inconsistent heights of the samples can be avoided. Therefore, the invention saves time and ensures the test precision.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, the patentees may make various modifications or alterations within the scope of the appended claims, and are intended to be within the scope of the invention as described in the claims.
Claims (9)
1. The utility model provides a multiple spot indentation device for soft material, its characterized in that includes integral type supporting seat, draws pressure sensor, probe and pressure head, integral type supporting seat includes the supporting seat body, the middle part of supporting seat body is equipped with the supporting seat through-hole, the outside of supporting seat body is equipped with the bracing piece, draw pressure sensor to locate every on the bracing piece, the probe is located on the pressure sensor that draws, the lower extreme of probe is located to the pressure head.
2. The multi-point indentation device for soft materials as recited in claim 1 wherein the pull pressure sensor is detachably mounted to the support bar by fasteners.
3. The multi-point indentation device for soft materials as claimed in claim 1, wherein the supporting seat body is of a square structure, the supporting seat through holes are square holes, and four outer sides of the supporting seat body of the square structure are respectively provided with supporting rods.
4. The multi-point indentation device for soft materials as recited in claim 1 wherein the support bar is a U-shaped structure.
5. The multi-point indentation system for soft materials is characterized by comprising an electric control translation table, the multi-point indentation device of any one of claims 1-4, a multi-hole support base and an optical platform, wherein the electric control translation table comprises an X-axis translation table, a Y-axis translation table and a Z-axis translation table, the Z-axis translation table is vertically and detachably arranged on the optical platform, the X-axis translation table is horizontally and detachably arranged on the optical platform, the Y-axis translation table is detachably arranged on the X-axis translation table, the multi-hole support base is detachably arranged on the Y-axis translation table, and the multi-point indentation device is detachably arranged on the Z-axis translation table.
6. The multi-point indentation system for soft materials of claim 5 wherein the porous support base comprises a base body, a base through hole is provided in the middle of the base body, and a mounting hole on the base is used as a trough and provided with graduation marks for ensuring that a plurality of samples are at the same height.
7. The multi-point indentation system for soft materials of claim 5 wherein the Z-axis translation stages are two, the two Z-axis translation stages being interconnected by a detachable fastener.
8. The multi-point indentation system for soft materials as recited in claim 5 further comprising a PLC control circuit connected to the electronically controlled translation stage.
9. A method for a multi-point indentation system for soft materials according to any of the claims 5-8, characterized by the steps of:
s1, placing a sample on a porous support base, and ensuring that the height of the sample is in the same scale line of a trough;
s2, controlling the X-axis translation stage and the Y-axis translation stage to move, and moving the sample to a set first position;
s3, controlling the Z-axis translation stage to drive the multi-point indentation device to move downwards to contact with the sample, continuously moving downwards to a set position, then lifting back, and collecting a first group of data by the tension pressure sensor;
s4, repeatedly executing the steps S2-S3 until data acquisition of n positions is completed, and forming second to nth groups of data;
s5, transmitting the first to nth groups of data to the terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310223466.7A CN116337664A (en) | 2023-03-09 | 2023-03-09 | Multi-point indentation device, system and test method for soft material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310223466.7A CN116337664A (en) | 2023-03-09 | 2023-03-09 | Multi-point indentation device, system and test method for soft material |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203824850U (en) * | 2014-04-29 | 2014-09-10 | 深圳唯一科技股份有限公司 | Strength testing device for mobile phone touch screen |
| CN105973694A (en) * | 2016-07-25 | 2016-09-28 | 长春工业大学 | Nano indentation testing device under stretch-four-point bending preload |
| CN110132750A (en) * | 2019-06-26 | 2019-08-16 | 华东理工大学 | A kind of impression test device and test method |
| CN112945776A (en) * | 2021-02-04 | 2021-06-11 | 惠州检微科技有限公司 | Gun type measuring head of real-time indentation analyzer |
| CN114923798A (en) * | 2022-05-27 | 2022-08-19 | 钢研纳克检测技术股份有限公司 | Pressure head spacing evaluation method for mechanical test through micro-indentation method |
-
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- 2023-03-09 CN CN202310223466.7A patent/CN116337664A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203824850U (en) * | 2014-04-29 | 2014-09-10 | 深圳唯一科技股份有限公司 | Strength testing device for mobile phone touch screen |
| CN105973694A (en) * | 2016-07-25 | 2016-09-28 | 长春工业大学 | Nano indentation testing device under stretch-four-point bending preload |
| CN110132750A (en) * | 2019-06-26 | 2019-08-16 | 华东理工大学 | A kind of impression test device and test method |
| CN112945776A (en) * | 2021-02-04 | 2021-06-11 | 惠州检微科技有限公司 | Gun type measuring head of real-time indentation analyzer |
| CN114923798A (en) * | 2022-05-27 | 2022-08-19 | 钢研纳克检测技术股份有限公司 | Pressure head spacing evaluation method for mechanical test through micro-indentation method |
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