CN109520939A - A kind of material testing apparatus - Google Patents
A kind of material testing apparatus Download PDFInfo
- Publication number
- CN109520939A CN109520939A CN201910004483.5A CN201910004483A CN109520939A CN 109520939 A CN109520939 A CN 109520939A CN 201910004483 A CN201910004483 A CN 201910004483A CN 109520939 A CN109520939 A CN 109520939A
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- Prior art keywords
- scattered reflection
- reflection cavity
- fixed
- light
- checked
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Links
- 238000004154 testing of material Methods 0.000 title claims abstract description 20
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000005269 aluminizing Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 5
- 238000004445 quantitative analysis Methods 0.000 abstract description 5
- 239000012780 transparent material Substances 0.000 description 10
- 238000009792 diffusion process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 241001465382 Physalis alkekengi Species 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
Abstract
The present invention relates to optical property detection technique fields, disclose a kind of material testing apparatus, including pedestal (3), scattered reflection cavity (1) and the placement department (8) for placing drafting board to be checked (5) are respectively equipped on the pedestal (3), the scattered reflection of the scattered reflection cavity (1) is intracavitary to be equipped with light source, the front of light outlet of placement department (8) setting in the scattered reflection cavity (1), it is incident on drafting board to be checked (5) after being commutated with the light that light source can be made to issue in the detection process via the scattered reflection chamber, the placement department (8) passes through fixed bracket (6) and is mounted on the pedestal (3), the fixed bracket (6) can adjust the tilt angle of the placement department (8) with respect to the horizontal plane.The present invention can advantageously combine car light goniophotometer, measure the Energy distribution of the drafting board emergent ray to be checked of differing tilt angles, so as to realize the quantitative analysis to material transmission or scattering power.
Description
Technical field
The present invention relates to optical property detection technique fields, more particularly to a kind of material testing apparatus.
Background technique
In car light research and development and design process, transparent material is widely used.It is generated according to light by transparent material
Effect it is different, transparent material can be usually divided into two kinds of transparent material of direct projection transparent material and scattering.For transparent material, especially
It plays decisive action to the distribution of the final light type of car light and energy to scattering transparent material, transmission performance.
Therefore, most important in car light design process to the detection of corresponding transparent material transmission performance.In current side
In case, there are no a kind of measuring device of simplicity, it is able to achieve to transparent material, especially scattering transparent material optical property is fast
Speed detection.
Summary of the invention
The present invention provides a kind of material testing apparatus, by the material testing apparatus, advantageously car light can be combined to survey
Angle photometer, can the quantitatively transmission of assessment material and scattering property, thus for lamps and lanterns optical design provide important references and
Foundation.
To achieve the goals above, the present invention provides a kind of material testing apparatus, including pedestal, sets respectively on the pedestal
There are scattered reflection cavity and the placement department for placing drafting board to be checked, the scattered reflection of the scattered reflection cavity is intracavitary to be equipped with light
The front of the light outlet of the scattered reflection cavity is arranged in source, the placement department, described that can make in the detection process
The light that light source issues is incident on the drafting board to be checked placed in the placement department after commutating via the scattered reflection chamber, described
Placement department is mounted on the base by fixed bracket, and the fixed bracket can adjust the placement department with respect to the horizontal plane
Tilt angle.
Preferably, the rear surface of the scattered reflection cavity is the paraboloid of outwardly convex, the paraboloidal inner wall
It is equipped with pattern structure.
Preferably, the light source is the light source of bulb form, and scattered reflection chamber rear middle position is equipped with and is used for
The light bulb is installed to the intracavitary mounting opening of the scattered reflection, and the light bulb filament center is the paraboloidal focus position
It sets.
Preferably, the light bulb is fixed on that the scattered reflection is intracavitary, and the mounting structure includes lamp by mounting structure
Bubble pedestal and reflection cavity connector, the light bulb are mounted in the light bulb base, and the light bulb base and the reflection cavity connect
Fitting is fixed for rotary clamping, and the reflection cavity connector is fixedly connected with the scattered reflection cavity.
Preferably, the reflection cavity connector is in hollow structure, and inner circumferential surface is equipped with multiple clamping grooves, the light bulb base
Outer peripheral surface is equipped with multiple clamping blocks with clamping groove cooperation, and the reflection cavity connector outer peripheral surface is equipped with mounting ear, described
Mounting ear is equipped with mounting hole, and the reflection cavity connector is fixed on the scattered reflection chamber rear by the mounting ear.
Preferably, the surrounding inner wall of the scattered reflection cavity is the face of aluminizing.
Preferably, the placement department is equipped with for blocking the vertical mounting groove for setting drafting board side to be checked, and the placement department
It is equipped with drafting board fastening mounting structure to be checked.
Preferably, the fixed bracket includes fixed structure, connection structure and protractor, and the fixed structure includes one end
The fixing axle connecting with the placement department, the fixing axle other end are fixed with protractor pointer, the connection structure include according to
The clamping head of secondary connection, protractor mounting plate and support connecting shaft, the fixing axle rotary clamping are described in the clamping head
Protractor is mounted on the protractor mounting plate, and the connection structure is fixed on the base by support column.
Preferably, the clamping head includes pairs of clamping plate setting up and down, between the pairs of clamping plate inner wall
It is formed with the arc surface matched with the fixing axle, the clamping plate outside wall surface each extends over into the protractor mounting plate,
The protractor is fixed on the protractor mounting plate by fixing piece, and the pairs of clamping plate is fixed by fastener.
The present invention is by setting scattered reflection cavity, light source and the placement department for placing drafting board to be checked, so that light source is sent out
Light out is again incident on drafting board to be checked after diffusion by the scattered reflection cavity reflections and within the scope of certain angle, is made
The light obtained after reflection is more stable, avoids light diffusion too big, so that being capable of forming apparent light on drafting board to be checked
Spot measures the Energy distribution of drafting board emergent ray to be checked so as to advantageously combine car light goniophotometer, so as to
To realize the quantitative analysis to material transmission or scattering power；It can conveniently adjust the placement department phase by the way that fixed bracket is arranged
For the tilt angle of horizontal plane, that is, the tilt angle of drafting board to be checked with respect to the horizontal plane is adjusted, can analyze different inclination angle
The transmission of the drafting board to be checked of degree or dispersion effect.
Detailed description of the invention
Fig. 1 is the front perspective view of material testing apparatus specific embodiment of the present invention；
Fig. 2 is the rear perspective figure of material testing apparatus specific embodiment of the present invention；
Fig. 3 is the front view of material testing apparatus specific embodiment of the present invention (without detection plate)；
Fig. 4 is the light bulb of the specific embodiment of the invention and the structural schematic diagram of mounting structure；
Fig. 5 is the support bracket fastened structural schematic diagram of the specific embodiment of the invention；
Fig. 6 is the structural schematic diagram of the connection structure in the fixation bracket of the specific embodiment of the invention.
Description of symbols
1 scattered reflection chamber, 2 reflection cavity bracket
3 pedestal, 4 mounting structure
4-1 light bulb 4-2 light bulb base
4-2-1 clamping block 4-3 reflection cavity connector
4-3-1 mounting ear 4-3-2 clamping groove
The fixed bracket of 5 drafting boards 6 to be checked
6-1 fixed structure 6-2 connection structure
6-2-1 clamping head 6-2-2 protractor mounting plate
6-2-3 supports connecting shaft 6-3 protractor
7 support column of 6-4 protractor pointer
8 placement departments
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the description of the present invention, it is to be understood that, the orientation or position of the instructions such as term "front", "rear", "outside" are closed
System is merely for convenience of description of the present invention and simplification of the description to be based on the orientation or positional relationship shown in the drawings, rather than indicates
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitation of the present invention.Wherein, based in orientation shown in attached drawing, on the basis of drafting board 5 to be checked, " preceding " is referred to close to be checked
The direction of drafting board 5, " rear " refer to the direction far from drafting board 5 to be checked, and on the basis of scattered reflection cavity 1, "outside" is referred to far
The direction of light outlet from scattered reflection cavity 1.
As shown in Figure 1 to Figure 3, the present invention provides a kind of material testing apparatus, including pedestal 3, sets respectively on the pedestal 3
There are scattered reflection cavity 1 and the placement department 8 for placing drafting board 5 to be checked, the scattered reflection of the scattered reflection cavity 1 is intracavitary to be set
There is light source, the front of the light outlet of the scattered reflection cavity 1 is arranged in the placement department 8, with can be in the detection process
The light for issuing the light source is incident on the drafting board to be checked placed in the placement department 8 after commutating via the scattered reflection chamber
On 5, the placement department 8 passes through fixed bracket 6 and is mounted on the pedestal 3, and the fixed bracket 6 can adjust the placement department
8 tilt angle with respect to the horizontal plane.
Drafting board 5 to be checked is installed in placement department 8 by the present invention, and by fixed bracket 6 adjust the placement department 8 relative to
The tilt angle of horizontal plane adjusts the tilt angle of drafting board 5 to be checked with respect to the horizontal plane, then open light source, issues
Light is incident on drafting board 5 to be checked after scattered reflection chamber scattered reflection, and the drafting board 5 to be checked is transparent drafting board 5 to be checked, is led to
The drafting board to be checked 5 is crossed, so that light changes original energy or path outgoing, in conjunction with car light goniophotometer, can be surveyed
The Energy distribution of 5 emergent ray of drafting board to be checked of differing tilt angles is measured, so as to realize to material transmission or scattering energy
The quantitative analysis of power, to provide important reference and foundation for lamps and lanterns optical design.
Wherein, the car light with goniophotometric be calculated as LMT company 1660 model of GO-H goniophotometer or
The goniophotometer of the AMS3000 model of Optronik company, the goniophotometer mainly by probe and can be with up and down direction
Or the rotating platform composition of horizontal direction rotation, specific measurement process are as follows:
Detection device of the present invention is fixed on the rotating platform of goniophotometer, and by probe placement rotating platform just
The position of front 3.16m when measurement, is popped one's head in motionless, by up and down or rotating horizontally the rotating platform, so that probe can be surveyed
The Energy distribution of the emergent ray of drafting board to be checked in all directions is measured, material transmission or scattering power are determined so as to realize
Amount analysis.
Wherein, the effect of scattered reflection cavity 1 is to project again after reflecting the light that light source issues, because of scattered reflection chamber
The reflecting surface of body 1 is fixed, so that the light after reflection is more stable, and makes the light projected in certain angle model
It is again incident on drafting board 5 to be checked after enclosing interior diffusion, avoids light diffusion too big, so that being capable of forming on drafting board 5 to be checked obvious
Hot spot, the Energy distribution convenient for treating 5 emergent ray of detection plate subsequently through goniophotometer detected.
Specifically, the scattered reflection cavity 1 is made of peripheric surface and rear surface, the rear table of the scattered reflection cavity 1
Face is the paraboloid of outwardly convex, and the paraboloidal inner wall is equipped with pattern structure.
Emergent ray of the light after the scattered reflection chamber is enabled to by setting paraboloid and pattern structure as a result,
It is again incident on after capable of being spread within the scope of certain angle on drafting board 5 to be checked.
The surrounding inner wall of the scattered reflection cavity 1 is the face of aluminizing, and can be further enhanced by the way that the face of aluminizing is arranged
The reflecting effect of scattered reflection chamber.
In one embodiment, the scattered reflection cavity 1 is fixed on the pedestal 3 by reflection cavity bracket 2, described
Reflection cavity bracket 2 is three vertical fixed columns.
In one embodiment, the light source is the light source of light bulb 4-1 form, among 1 rear portion of scattered reflection cavity
Position, which is equipped with, is installed to the intracavitary mounting opening of the scattered reflection for the light bulb 4-1, and the light bulb 4-1 filament center is
The paraboloidal focal position.
In one embodiment, as shown in figure 4, the light bulb 4-1 is fixed on the scattered reflection chamber by mounting structure 4
Interior, the mounting structure 4 includes that light bulb base 4-2 and reflection cavity connector 4-3, the light bulb 4-1 are mounted on the light bulb bottom
On seat 4-2, the light bulb base 4-2 and reflection cavity connector 4-3 fixes for rotary clamping, the reflection cavity connector 4-
3 are fixedly connected with the scattered reflection cavity 1.
Specifically, the reflection cavity connector 4-3 is in hollow structure, and inner circumferential surface is equipped with multiple clamping groove 4-3-2, described
Light bulb base 4-2 outer peripheral surface is equipped with multiple clamping block 4-2-1 with clamping groove 4-3-2 cooperation, the reflection cavity connector
4-3 outer peripheral surface is equipped with mounting ear 4-3-1, and the mounting ear 4-3-1 is equipped with mounting hole, and the reflection cavity connector 4-3 passes through
The mounting ear 4-3-1 is fixed on 1 rear portion of scattered reflection cavity.
When light bulb 4-1 is installed, the reflection cavity connector 4-3 is fixed on by the mounting ear 4-3-1 first described
The mounting ear 4-3-1 is fixed on 1 rear portion of scattered reflection cavity by screw or rivet, so by 1 rear portion of scattered reflection cavity
The light bulb 4-1 is passed through into the reflection cavity connector 4-3 afterwards, and makes the clamping block 4- of the light bulb base 4-2 outer peripheral surface
2-1 is inserted into the clamping groove 4-3-2, the light bulb base 4-2 is then rotated, so that the light bulb base 4-2 is connected to
On the reflection cavity connector 4-3, so that the scattered reflection that the light bulb 4-1 is fixed on the scattered reflection cavity 1 is intracavitary.
In one embodiment, as shown in figure 5, the fixed bracket 6 includes fixed structure 6-1, connection structure 6-2 and amount
Angle device 6-3, the fixed structure 6-1 include the fixing axle that one end is connect with the placement department 8, and the fixing axle other end is fixed
Have protractor pointer 6-4, the connection structure 6-2 include sequentially connected clamping head 6-2-1, protractor mounting plate 6-2-2 and
Connecting shaft 6-2-3 is supported, in the clamping head 6-2-1, the protractor 6-3 is mounted on described the fixing axle rotary clamping
On protractor mounting plate 6-2-2, the connection structure 6-2 is fixed on the pedestal 3 by support column 7.
By in the clamping head 6-2-1, revolving the fixing axle fixing axle rotary clamping
Turn, consequently facilitating adjusting the tilt angle of the drafting board 5 to be checked with respect to the horizontal plane, the fixing axle will drive while rotation
The protractor pointer 6-4 rotation, so as to read out the tilt angle of drafting board 5 to be checked with respect to the horizontal plane at any time, then
By measuring the Energy distribution of 5 emergent ray of drafting board to be checked of differing tilt angles in conjunction with car light goniophotometer, so as to
To realize the quantitative analysis to material transmission or scattering power.
In one embodiment, the placement department 8 is equipped with for blocking the vertical mounting groove for setting drafting board side to be checked, and institute
Placement department 8 is stated equipped with drafting board fastening mounting structure to be checked.
Wherein, the drafting board fastening mounting structure to be checked is threaded hole or rivet hole, and the side of drafting board to be checked is stuck in institute
It states in vertical mounting groove, is then fastened by screw or rivet, so that drafting board to be checked is fixed in placement department 8.
In one embodiment, as shown in fig. 6, the clamping head 6-2-1 includes pairs of clamping plate setting up and down, in pairs
The clamping plate inner wall between be formed with the arc surface matched with the fixing axle, the fixing axle is connected to the circle
In cambered surface, so that the fixing axle can each extend over into institute in the circular arc rotation in surface, the clamping plate outside wall surface
Protractor mounting plate 6-2-2 is stated, the protractor 6-3 is fixed on the protractor mounting plate 6-2-2 by fixing piece, described
Fixing piece is screw or rivet, and the pairs of clamping plate is fixed by fastener, and the fastener is pin or bolt.
Specific installation steps of the invention are as follows:
The scattered reflection cavity 1 is fixed on the pedestal 3 by reflection cavity bracket 2 first；
Then it is intracavitary light bulb 4-1 to be fixed on by the scattered reflection by mounting structure 4, wherein the specific peace of light bulb 4-1
Dress process are as follows: the reflection cavity connector 4-3 is fixed on 1 rear portion of scattered reflection cavity by the mounting ear 4-3-1,
The mounting ear 4-3-1 is fixed on 1 rear portion of scattered reflection cavity by screw or rivet, then wears the light bulb 4-1
The reflection cavity connector 4-3 is crossed, and the clamping block 4-2-1 of the light bulb base 4-2 outer peripheral surface is made to be inserted into the clamping groove
In 4-3-2, the light bulb base 4-2 is then rotated, so that the light bulb base 4-2 is connected to the reflection cavity connector 4-
On 3, so that the scattered reflection that the light bulb 4-1 is fixed on the scattered reflection cavity 1 is intracavitary；
Placement department 8 is mounted on the pedestal 3 finally by fixed bracket 6, specific installation process are as follows: first pass through support
Connection structure 6-2 is fixed on the pedestal 3 by column 7, then by fixing axle rotary clamping connection structure 6-2 clamping head
On, then protractor 6-3 is mounted on the protractor mounting plate 6-2-2, and is respectively fixedly connected at the both ends of fixing axle
Placement department 8 and protractor pointer 6-4.
In conclusion the present invention passes through setting scattered reflection cavity 1, light source and the placement department for placing drafting board 5 to be checked
8, so that the light that light source issues is reflected by the scattered reflection cavity 1 and is again incident on after spreading within the scope of certain angle
On drafting board 5 to be checked, so that the light after reflection is more stable, avoid light diffusion too big, so that the energy on drafting board 5 to be checked
Apparent hot spot is enough formed, car light goniophotometer can be advantageously combined, measure the energy of 5 emergent ray of drafting board to be checked
Distribution, so as to realize the quantitative analysis to material transmission or scattering power；It can conveniently adjust by the way that fixed bracket 6 is arranged
The tilt angle of the placement department 8 with respect to the horizontal plane adjusts the tilt angle of drafting board 5 to be checked with respect to the horizontal plane, can be with
Analyze transmission or the dispersion effect of the drafting board to be checked 5 of differing tilt angles.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. a kind of material testing apparatus, which is characterized in that including pedestal (3), be respectively equipped with scattered reflection chamber on the pedestal (3)
Body (1) and placement department (8) for placing drafting board to be checked (5), the scattered reflection of the scattered reflection cavity (1) is intracavitary to be equipped with light
Source, the placement department (8) setting is in the front of the light outlet of the scattered reflection cavity (1), with can be in the detection process
The light for issuing the light source via be incident on the placement department (8) after scattered reflection chamber commutation place it is to be detected
On plate (5), the placement department (8) passes through fixed bracket (6) and is mounted on the pedestal (3), and the fixed bracket (6) can adjust
Save the tilt angle of the placement department (8) with respect to the horizontal plane.
2. material testing apparatus according to claim 1, which is characterized in that the rear surface of the scattered reflection cavity (1)
For the paraboloid of outwardly convex, the paraboloidal inner wall is equipped with pattern structure.
3. material testing apparatus according to claim 2, which is characterized in that the light source is the light of light bulb (4-1) form
Source, scattered reflection cavity (1) the rear portion middle position are intracavitary equipped with the scattered reflection is installed to for the light bulb (4-1)
Mounting opening, light bulb (4-1) the filament center be the paraboloidal focal position.
4. material testing apparatus according to claim 3, which is characterized in that the light bulb (4-1) passes through mounting structure (4)
It is intracavitary to be fixed on the scattered reflection, the mounting structure (4) includes light bulb base (4-2) and reflection cavity connector (4-3), institute
It states light bulb (4-1) to be mounted on the light bulb base (4-2), the light bulb base (4-2) and the reflection cavity connector (4-3)
It is fixed for rotary clamping, the reflection cavity connector (4-3) is fixedly connected with the scattered reflection cavity (1).
5. material testing apparatus according to claim 4, which is characterized in that the reflection cavity connector (4-3) is in hollow
Structure, inner circumferential surface are equipped with multiple clamping grooves (4-3-2), and light bulb base (4-2) outer peripheral surface is equipped with the multiple and clamping
The clamping block (4-2-1) of slot (4-3-2) cooperation, reflection cavity connector (4-3) outer peripheral surface are equipped with mounting ear (4-3-1), institute
Mounting ear (4-3-1) is stated equipped with mounting hole, the reflection cavity connector (4-3) is fixed on by the mounting ear (4-3-1)
Scattered reflection cavity (1) rear portion.
6. material testing apparatus according to claim 1, which is characterized in that in the surrounding of the scattered reflection cavity (1)
Wall surface is the face of aluminizing.
7. material testing apparatus according to claim 1, which is characterized in that the placement department (8) is equipped with to be set for blocking
The vertical mounting groove of drafting board side to be checked, and the placement department (8) is equipped with drafting board fastening mounting structure to be checked.
8. according to claim 1 to the material testing apparatus any in 7, which is characterized in that the fixed bracket (6) includes
Fixed structure (6-1), connection structure (6-2) and protractor (6-3), the fixed structure (6-1) includes one end and the placement
The fixing axle of portion (8) connection, the fixing axle other end are fixed with protractor pointer (6-4), and the connection structure (6-2) includes
Sequentially connected clamping head (6-2-1), protractor mounting plate (6-2-2) and support connecting shaft (6-2-3), the fixing axle rotation
It is connected in the clamping head (6-2-1), the protractor (6-3) is mounted on the protractor mounting plate (6-2-2), described
Connection structure (6-2) is fixed on the pedestal (3) by support column (7).
9. material testing apparatus according to claim 8, which is characterized in that the clamping head (6-2-1) includes above dividing into
The clamping plate being set to pair is formed with the arc surface matched with the fixing axle, institute between the pairs of clamping plate inner wall
It states clamping plate outside wall surface and each extends over into the protractor mounting plate (6-2-2), the protractor (6-3) is fixed by fixing piece
On the protractor mounting plate (6-2-2), the pairs of clamping plate is fixed by fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004483.5A CN109520939A (en) | 2019-01-03 | 2019-01-03 | A kind of material testing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004483.5A CN109520939A (en) | 2019-01-03 | 2019-01-03 | A kind of material testing apparatus |
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| CN109520939A true CN109520939A (en) | 2019-03-26 |
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