CN112504135B - Height detection device and detection method thereof - Google Patents
Height detection device and detection method thereof Download PDFInfo
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- CN112504135B CN112504135B CN202011369909.6A CN202011369909A CN112504135B CN 112504135 B CN112504135 B CN 112504135B CN 202011369909 A CN202011369909 A CN 202011369909A CN 112504135 B CN112504135 B CN 112504135B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
Abstract
The invention discloses a height detection device and a detection method thereof, wherein the height detection device comprises a base, a rotating rod, an angle sensor, a test tube, an elastic piece and a flexible deformation assembly; the rotating rod is rotatably arranged on the base, and the angle sensor is used for detecting the rotating angle value of the rotating rod; one end of the elastic piece is fixedly connected with the base, and the other end of the elastic piece is fixedly connected with the rotating rod; the flexible deformation component comprises a plurality of flexible deformation pieces which are sequentially arranged and fixed on the rotating rod along the height extension direction of the rotating rod; the test tube external force acts on the flexible deformation subassembly for the flexible deformation piece of deformation produces rotatory torsion to the bull stick, and the flexible deformation piece quantity that takes place deformation is different, makes bull stick rotation angle value change thereupon. According to the technical scheme, the test tubes with any height can be detected by fixing the flexible deformation pieces on the rotating rod; meanwhile, the detection range can be enlarged by increasing the number of the flexible deformation pieces, and the technical problems of complex structure, low compatibility and low expandability of the high-degree detection assembly in the prior art are solved by applying the technical scheme.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a height detection device and a detection method thereof.
Background
Various industries typically require the detection of the height of an object by a height detection assembly. In the IVD (in vitro diagnostic products, Chinese translation into in vitro diagnostic products) industry, height detection modules are commonly used to detect the height of test tubes.
Traditional test tube height detection subassembly generally arranges a plurality of correlation or diffraction opto-couplers in the not co-altitude department of support, and the test tube of co-altitude can shelter from different sensors, discerns the test tube of co-altitude not through the state that reads the sensor. With the increase of instrument items, the types of test tubes to be identified are increased, the structure of the height detection assembly is more and more complex, and the cost is greatly increased; on the other hand, based on the detection principle of the existing height detection assembly, the detection height is limited, and the compatibility and the expandability are low.
Disclosure of Invention
Based on the above, the invention provides a height detection device and a detection method thereof, so as to solve the technical problems of complex structure, low compatibility and low expandability of the height detection device in the prior art.
In a first aspect, the present invention provides a height detection apparatus comprising:
the device comprises a base, a rotating rod, an angle sensor, a test tube, an elastic piece and a flexible deformation component;
the rotating rod is rotatably arranged on the base, and the angle sensor is used for detecting the rotating angle value of the rotating rod; one end of the elastic piece is fixedly connected with the base, and the other end of the elastic piece is fixedly connected with the rotating rod; the flexible deformation assembly comprises a plurality of flexible deformation pieces which are sequentially arranged and fixed on the rotating rod along the height extending direction of the rotating rod;
carry the test tube when flexible deformation subassembly, test tube external force acts on flexible deformation subassembly, the elastic component is under the tensile force effect of bull stick, the flexible deformation spare with the test tube contact receives external force to take place deformation, make the flexible deformation spare of deformation produce rotatory torsion to the bull stick, when rotatory torsion is balanced with the pulling force of elastic component, the rotation takes place for the bull stick, angle sensor detects the rotation angle value of bull stick, the test tube is highly different, the quantity of the flexible deformation spare of deformation takes place is different, make bull stick rotation angle value change thereupon, the corresponding relation between the rotation angle value of bull stick and the height value of test tube calculates the height value of test tube.
In an embodiment of the height detection device, the flexible deformation element is in a needle-shaped configuration.
In an embodiment of the height detecting device, the flexible deformation member includes a needle root fixedly connected to the rotating rod and a needle tip extending from the needle root in a direction away from the rotating rod.
In an embodiment of the height detection device, the base includes a bottom plate and a top plate which are oppositely arranged, one end of the rotating rod is movably connected with the bottom plate, and the other end of the rotating rod is movably connected with the top plate.
In an embodiment of the height detection apparatus, the flexible deformation member is spaced apart from the base plate.
In an embodiment of the height detection apparatus, the flexible deformation member is spaced apart from the top plate.
In an embodiment of the height detection device, a projection of the flexible deformation component at least partially does not overlap a projection of the base plate in a height extending direction of the rotating rod.
In an embodiment of the height detection apparatus, a projection of the flexible deformation member is located within a projection of the top plate in a height extending direction of the rotating rod.
In a second aspect, a detection method of a height detection device is provided, where the height detection device is the height detection device in a first direction, and the detection method includes:
collecting a rotation angle value of the rotating rod through the angle sensor;
and determining the height value of the object passing through the flexible deformation assembly according to the rotation angle value.
In an embodiment of the detection method of the height detection apparatus, the determining the height value of the object passing through the flexible deformation assembly according to the rotation angle value includes:
substituting the rotation angle value into a formula:
h is a height value, and a, b, c and d are fitting parameters of the elastic piece and the flexible deformation piece;
and calculating to obtain the height value.
The embodiment of the invention has the following beneficial effects:
in the invention, when a conveyed test tube passes through the flexible deformation assembly, external force of the test tube acts on the flexible deformation assembly, the flexible deformation piece in contact with the test tube is deformed under the action of the external force under the action of the tensile force of the elastic piece on the rotating rod, meanwhile, the deformed flexible deformation piece can generate a rotating torsion force on the rotating rod, when the rotating torsion force is balanced with the tensile force of the elastic piece, the rotating rod can rotate, and the angle sensor can detect the rotation angle value of the rotating rod; the number of the flexible deformation pieces which deform is changed along with the different heights of the test tubes, and the rotation angle value of the rotating rod is changed along with the change of the number of the flexible deformation pieces; therefore, the rotation angle value of the rotating rod is detected through the angle sensor, and the height value of the corresponding test tube can be calculated through the corresponding relation between the rotation angle value and the height value of the test tube. According to the technical scheme, the test tubes with any height can be detected by fixing the flexible deformation pieces on the rotating rod; meanwhile, the detection range can be enlarged by increasing the number of the flexible deformation pieces, and by applying the technical scheme, the technical problems of complex structure, low compatibility and low expandability of the height detection assembly in the prior art are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
fig. 1 is a schematic view illustrating an overall structure of a height detection apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the rotating rod and the flexible deformation assembly;
FIG. 3 illustrates a force diagram of the flexible deformation assembly;
FIG. 4 shows a force diagram of the turn bar;
fig. 5 is a schematic flow chart illustrating a detection method of a height detection apparatus according to an embodiment of the present invention.
Description of the main element symbols:
100. a height detection device; 11. A base plate; 12. a top plate; 13. a support plate; 14. a first separator; 141. a hook member; 15. a second separator; 20. a rotating rod; 21. fixing a column; 30. a flexible deformation assembly; 40. an elastic member; 50. an angle sensor; 60. test tubes.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiments of the present invention will be described below with reference to the drawings.
Referring to fig. 1, the present invention provides a height detecting device 100, and is explained in detail with reference to detecting the height of a test tube 60. The detection object of the height detection device 100 includes, but is not limited to, the test tube 60.
Wherein, the height detection device 100 comprises a base, a rotating rod 20, an angle sensor 50, an elastic member 40 and a flexible deformation component 30; the rotating rod 20 is rotatably arranged on the base, and the angle sensor 50 is used for detecting a rotating angle value of the rotating rod 20; one end of the elastic element 40 is fixedly connected with the base, and the other end of the elastic element 40 is fixedly connected with the rotating rod 20; the flexible deformation assembly 30 includes a plurality of flexible deformation members sequentially arranged and fixed on the rotation bar 20 along the height extension direction of the rotation bar 20.
In the present invention, when the conveyed test tube 60 passes through the flexible deformation assembly 30, an external force of the test tube 60 acts on the flexible deformation assembly 30, and under the action of a pulling force of the elastic member 40 on the rotating rod 20, the flexible deformation member contacting with the test tube 60 is deformed by the external force, and meanwhile, the deformed flexible deformation member generates a rotating torque force to the rotating rod 20, when the rotating torque force is balanced with the pulling force of the elastic member 40, the rotating rod 20 rotates, and the angle sensor 50 detects a rotation angle value of the rotating rod 20; the number of the flexible deformation members which deform is changed along with the different heights of the test tubes 60, and the rotation angle value of the rotating rod 20 is changed along with the change of the number of the flexible deformation members; therefore, the rotation angle value of the rotary rod 20 is detected by the angle sensor 50, and the height value of the corresponding test tube 60 can be calculated by the corresponding relationship between the rotation angle value and the height value of the test tube 60. According to the technical scheme, the test tube 60 with any height can be detected by fixing the flexible deformation pieces on the rotating rod 20; meanwhile, the detection range can be enlarged by increasing the number of the flexible deformation pieces, and the technical problems of complex structure and low compatibility of the height detection assembly in the prior art are solved by using the technical scheme.
Specifically, referring to fig. 2, the flexible deformation assembly 30 remains in a horizontal disposition when not acted upon by the test tube 60; in actual use, the height detection device 100 is disposed at the side of the feeding track of the test tube 60. When the test tube 60 moves in a translational manner under the action of the sample feeding track, the test tube 60 generates an external force F0 to the flexible deformation member, and the flexible deformation member generates a deformation force F1 under the action of the external force F0, specifically referring to fig. 3. Meanwhile, as the flexible deformation component 30 is connected with the rotating rod 20, the deformed flexible deformation component can generate a torsion force F2 to the rotating rod 20; on the other hand, the elastic member 40 connected to the rotating rod 20 generates a pulling force F3 opposite to the twisting force F2 to the rotating rod 20. Under the action balance of the torsion F2 and the tension F3, the rotating rod 20 rotates, and the rotating angle value is set as
See in particular fig. 4. The torsion force F2 and the deformation force F1 satisfy the following relationship:
wherein n represents the number of the flexible deformation pieces which are deformed, a represents the deformation coefficient of the flexible deformation pieces, and C represents the system compensation coefficient.
In this embodiment, angle sensor 50 is connected with bull stick 20, and when bull stick 20 rotated, angle sensor 50 rotated the rotation angle value in order to detect bull stick 20 thereupon, and the rotation angle value of bull stick 20 can map out the quantity of the flexible deformation piece that takes place deformation, and the height value of test tube 60 through flexible deformation subassembly 30 is calculated to the quantity of the flexible deformation piece of rethread deformation.
Wherein, the height value of the test tube 60 passing through the flexible deformation assembly 30 is calculated by the number of the flexible deformation members and can be divided into two cases: firstly, the bottom of the test tube 60 is flush with the bottom of the flexible deformation assembly 30, and at the moment, the sum of the lengths of the deformed flexible deformation members in the vertical direction is the height value of the test tube 60; secondly, there is a spacing distance between the bottom of the test tube 60 and the bottom of the flexible deformation component 30, and at this time, the height value of the test tube 60 can be obtained by adding the spacing distance to the sum of the lengths of the deformed flexible deformation components in the vertical direction.
With continued reference to FIG. 1, in one embodiment, the flexible deformation element is in a needle-like configuration. The flexible deformation member is limited to be in a needle-shaped structure, so that the linear relation between the height value and the rotation angle value of the test tube 60 can be ensured to the maximum extent, and the compatibility and the expandability of the height detection device 100 are enhanced.
Preferably, the length extension direction of the flexible deformation member is perpendicular to the height extension direction of the rotating rod 20, and the length extension direction of the flexible deformation member is perpendicular to the feeding direction of the test tube 60, wherein the rotating rod 20 is vertically arranged, and the flexible deformation member is horizontally arranged.
In some embodiments, the flexible deformable member includes a needle base fixedly connected to the rotating rod 20 and a needle tip extending from the needle base away from the rotating rod 20. Therefore, when the test tube 60 passes through the flexible deformation assembly 30, the flexible deformation member acts with the test tube 60 through the needle tip portion to ensure that the test tube 60 passes through smoothly; the deformation force of the flexible deformation part generated by deformation acts on the rotating rod 20 effectively and stably through the needle root.
In one embodiment, the base comprises a bottom plate 11 and a top plate 12 which are oppositely arranged, and a support plate 13 connected between the bottom plate 11 and the top plate 12, wherein one end of a rotating rod 20 is movably connected with the bottom plate 11, and the other end of the rotating rod 20 is movably connected with the top plate 12. Support the both ends of bull stick 20 jointly through bottom plate 11 and roof 12 to guarantee that bull stick 20 rotates steadily, wherein, the pinpoint portion deviates from extension board 13, so that test tube 60's access way does not receive the limitation, and guarantee that test tube 60 passes through flexible deformation subassembly 30.
In one embodiment, the flexible deformation member 30 is spaced apart from the base plate 11. For multiple types and sizes of test tubes 60, there will be a test tube 60 with the smallest height value, and therefore, there will be a base height for any test tube 60; based on this, flexible deformation subassembly 30 and 11 intervals of bottom plate set up make the bottom of test tube 60 can with the bottom interval certain distance of flexible deformation subassembly 30, test tube 60 sampling channel and the bottom interval certain distance of flexible deformation subassembly 30 promptly, and at this moment, the flexible deformation piece that takes place deformation adds the interval distance value between flexible deformation subassembly 30 and the test tube 60 bottom in the sum of the length of vertical direction, just can obtain the height value of test tube 60.
In one embodiment, the flexible deformation assembly 30 is spaced from the top plate 12. Therefore, in the test tube 60 advance kind of in-process, when test tube 60 highly reaches the maximum detection value, the distance between flexible deformation subassembly 30 and the roof 12 can be ensured and can not take place the friction between test tube 60 and the roof 12, and then guarantees that test tube 60 passes through flexible deformation subassembly 30 smoothly.
In one embodiment, the projection of the flexible deformation member 30 does not at least partially overlap the projection of the base plate 11 in the height extension direction of the rotating rod 20. Therefore, the flexible deformation assembly 30 partially protrudes out of the bottom plate 11, that is, the bottom plate 11 and the flexible deformation assembly 30 form a let position port, so that the height detection device 100 is arranged on the side edge of the sample feeding track of the test tube 60, and it is ensured that the test tube 60 can pass through and act on the flexible deformation assembly 30 in the sample feeding process.
In one embodiment, the projection of the flexible deformation assembly 30 is located within the projection of the top plate 12 in the direction of the height extension of the rotating rod 20. Therefore, the top plate 12 partially protrudes from the flexible deformation assembly 30, and the top plate 12 forms a limiting notch in the flexible deformation assembly 30 so as to limit the test tube 60 in the vertical direction.
In addition, the base further includes a first partition 14 disposed between the bottom plate 11 and the top plate 12, the angle sensor 50 is disposed on the bottom plate 11, and the elastic member 40 is disposed on the first partition 14; alternatively, the angle sensor 50 is disposed on the first partition 14, and the elastic member 40 is disposed on the base plate 11 to separate the elastic member 40 from the angle sensor 50.
It should be noted that the first partition 14 is spaced from the flexible deformation assembly 30; the projection of the flexible deformation member 30 does not at least partially overlap the first partition 14 in the height extension direction of the rotating rod 20.
In some specific embodiments, the angle sensor 50 is disposed on the bottom plate 11, the elastic member 40 is disposed on the first partition 14, the hook member 141 is disposed on the first partition 14, the shaft of the rotating lever 20 protrudes to form the fixing post 21, one end of the elastic member 40 is connected to the hook member 141, and the other end of the elastic member 40 is connected to the fixing post 21.
The base further includes a second spacer 15 disposed between the first spacer 14 and the top plate 12 to separate the elastic member 40 from the flexible deformation assembly 30. It should be noted that the second partition 15 is arranged at a distance from the flexible deformation assembly 30; the projection of the flexible deformation member 30 does not at least partially overlap the second diaphragm 15 in the height extension direction of the rotating rod 20.
Preferably, the end of the bottom plate 11 away from the support plate 13, the end of the first partition plate 14 away from the support plate 13, and the end of the second partition plate 15 away from the support plate 13 are flush with each other.
In some specific embodiments, a first movable groove is formed on a surface of the bottom plate 11 opposite to the top plate 12, a second movable groove is formed on a surface of the top plate 12 opposite to the bottom plate 11, one end of the rotating rod 20 is rotatably accommodated in the first movable groove, and the other end of the rotating rod 20 is rotatably accommodated in the second movable groove. Wherein the rotating rod 20 penetrates the first partition 14 and the second partition 15.
Or, a first movable groove is formed on the surface of the bottom plate 11 opposite to the top plate 12, a through hole is formed in the top plate 12, one end of the rotating rod 20 is rotatably accommodated in the first movable groove, and the other end of the rotating rod 20 rotatably penetrates through the through hole. Wherein the rotating rod 20 penetrates the first partition 14 and the second partition 15.
In one embodiment, the height detecting device 100 further includes a first bearing and a second bearing, the first bearing is disposed at one end of the rotating rod 20 and is received in the first receiving groove; the second bearing is sleeved on the other end of the rotating rod 20 and is accommodated in the second accommodating groove/through hole, so that the rotating rod 20 can smoothly rotate relative to the base.
Referring to fig. 5, for the height detecting apparatus 100, the present invention further provides a detecting method, including:
s1, acquiring a rotation angle value of the rotating rod 20 through the angle sensor 50;
and S2, determining the height value of the object passing through the flexible deformation assembly 30 according to the rotation angle value.
Wherein, this detection object can be test tube 60, and test tube 60 can pass through and act on and flexible deformation subassembly 30 at the in-process of advancing a kind to make the flexible deformation piece of a certain amount take place deformation, the flexible deformation piece of deformation and elastic component 40's interact can make bull stick 20 take place to rotate, consequently, the rotation angle value of gathering bull stick 20 through angle sensor 50 can obtain test tube 60's height value.
In one embodiment, determining a height value of the object passing through the flexible deformation assembly 30 according to the rotation angle value includes:
substituting the rotation angle value into the formula:
wherein H is a height value, and a, b, c and d are fitting parameters of the elastic member 40 and the flexible deformation member;
and calculating to obtain a height value.
In this embodiment, the rotation angle value of the rotating rod 20 collected by the angle sensor 50 is directly substituted into the above formula, so as to directly obtain the height value of the corresponding test tube 60.
It should be noted that the above formula is for showing the relationship between the rotation angle value of the rotating rod 20 and the height value of the object passing through the flexible deformation assembly 30, and the formula is only one expression form in the current embodiment; in different embodiments, the form of the formula and the number of parameters may be adjusted correspondingly, but all are within the scope of the present invention.
In some specific embodiments, before the rotation angle value is substituted into the formula, the performance parameters of the elastic member 40 and the flexible deformation member are searched, and the values of the fitting parameters a, b, c, and d are determined according to the searched performance parameters.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A height detection device, comprising: the device comprises a base, a rotating rod, an angle sensor, a test tube, an elastic piece and a flexible deformation component;
the rotating rod is rotatably arranged on the base, and the angle sensor is used for detecting the rotating angle value of the rotating rod; one end of the elastic piece is fixedly connected with the base, and the other end of the elastic piece is fixedly connected with the rotating rod; the flexible deformation assembly comprises a plurality of flexible deformation pieces which are sequentially arranged and fixed on the rotating rod along the height extending direction of the rotating rod;
carry the test tube when flexible deformation subassembly, test tube external force acts on flexible deformation subassembly, the elastic component is under the tensile force effect to the bull stick, the flexible deformation spare with the test tube contact receives external force to take place deformation, make the flexible deformation spare of deformation produce rotatory torsion to the bull stick, when rotatory torsion is balanced with the pulling force of elastic component, the rotation takes place for the bull stick, angle sensor detects the rotation angle value of bull stick, the test tube is highly different, the quantity of the flexible deformation spare of deformation takes place is different, make bull stick rotation angle value change thereupon, the height value of test tube is calculated through the corresponding relation between the rotation angle value of bull stick and the height value of test tube.
2. The height detecting device according to claim 1, wherein the flexible deformation member has a needle-shaped structure.
3. The height detecting device according to claim 2, wherein the flexible deformation member includes a needle base fixedly connected to the rotary rod and a needle tip extending from the needle base in a direction away from the rotary rod.
4. The height detecting device according to claim 1, wherein the base includes a bottom plate and a top plate disposed opposite to each other, one end of the rotating rod is movably connected to the bottom plate, and the other end of the rotating rod is movably connected to the top plate.
5. The height sensing device of claim 4, wherein the flexible deformation assembly is spaced apart from the base plate.
6. The height sensing device of claim 4, wherein the flexible deformation member is spaced apart from the top plate.
7. The height detection device of claim 4, wherein a projection of the flexibly deformable member does not at least partially overlap a projection of the base plate in a height extending direction of the rotating rod.
8. The height detection device of claim 4, wherein a projection of the flexibly deformable member is located within a projection of the top plate in a height extension direction of the rotating rod.
9. A method for detecting a height detecting device, wherein the height detecting device is the height detecting device according to any one of claims 1 to 8, the method comprising:
collecting a rotation angle value of the rotating rod through the angle sensor;
and determining the height value of the object passing through the flexible deformation assembly according to the rotation angle value.
10. The method for detecting according to claim 9, wherein the determining the height value of the object passing through the flexibly deformable component according to the rotation angle value comprises:
substituting the rotation angle value into a formula:
h is a height value, and a, b, c and d are fitting parameters of the elastic piece and the flexible deformation piece;
and calculating to obtain the height value.
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| JP3705863B2 (en) * | 1996-04-30 | 2005-10-12 | 株式会社ソキア | Height measuring device and height measuring method |
| US7685886B2 (en) * | 2003-12-26 | 2010-03-30 | Toyota Jidosha Kabushiki Kaisha | Convexo concave amplifying device and convexo concave detecting method by use thereof, deformation sensing device and convexo concave detecting method by use thereof, and convexo concave position exhibiting device and convexo concave position exhibiting method |
| CN106091915B (en) * | 2016-05-31 | 2018-11-20 | 常州二维碳素科技股份有限公司 | The device and microspur detection method that microspur detecting sensor, perception microspur change |
| CN208904964U (en) * | 2018-07-03 | 2019-05-24 | 米亚索乐装备集成（福建）有限公司 | Flexible unit slackness test device |
| CN109405760A (en) * | 2018-11-14 | 2019-03-01 | 深圳市迈步机器人科技有限公司 | Fibre optical sensor, deformation detecting device, detection method and data glove |
| CN210246824U (en) * | 2019-10-30 | 2020-04-03 | Oppo广东移动通信有限公司 | Electronic device |
| CN211347745U (en) * | 2019-11-29 | 2020-08-25 | 昆山国显光电有限公司 | Flexible screen stiffness testing device |
| CN111819993A (en) * | 2020-08-20 | 2020-10-27 | 山东理工大学 | Combine harvester cuts high detection device of stubble |
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