CN115573478A - Intelligent monitoring elastic sliding plate support based on memory alloy - Google Patents
Intelligent monitoring elastic sliding plate support based on memory alloy Download PDFInfo
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- CN115573478A CN115573478A CN202211357339.8A CN202211357339A CN115573478A CN 115573478 A CN115573478 A CN 115573478A CN 202211357339 A CN202211357339 A CN 202211357339A CN 115573478 A CN115573478 A CN 115573478A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Springs (AREA)
Abstract
The invention discloses an intelligent monitoring elastic sliding plate support based on memory alloy, which comprises: elastic sliding plate support, shape memory alloy cable system and intelligent monitoring device. The elastic sliding plate support comprises an upper connecting plate, a lower connecting plate and a buffering and supporting system fixed between the upper connecting plate and the lower connecting plate, and the buffering and supporting system adopts an improved rubber and steel plate combined structure, so that the transverse rigidity is reduced, and a certain supporting effect is achieved; the shape memory alloy inhaul cable adopts an SMA inhaul cable and related construction to limit the deformation of the elastic sliding plate support, can recover the displacement of the elastic sliding plate support and can dissipate the vibration wave energy; the intelligent monitoring device can detect the stress, the displacement and the like of the support.
Description
Technical Field
The invention relates to the technical field of earthquake prevention and disaster reduction, in particular to an intelligent monitoring elastic sliding plate support based on memory alloy.
Background
Earthquakes are one of the major natural disasters facing human needs, which threaten the safety of human life and property, and cause collapse and damage of houses and infrastructures, and blockage and interruption of public transportation, and therefore, necessary anti-seismic measures must be taken to reduce the loss caused by earthquakes. The traditional earthquake-resistant method for buildings mainly consumes the energy of earthquake waves by improving the bearing capacity or plastic deformation capacity of components to reduce the deformation and damage caused by the earthquake waves to the maximum extent, so that the traditional buildings are often uneconomical or not attractive; the seismic isolation technology is characterized in that seismic energy is isolated by using a seismic isolation element and transmitted to a building structure, so that the safety of the building is guaranteed, the seismic effect on the building can be obviously reduced, the basic period of an upper structure is prolonged, the overall seismic performance of the structure is improved, and the seismic isolation technology has an obvious economic effect.
The application of rubber class isolation bearing is comparatively general among the current isolation bearing, but rubber class isolation bearing though have certain shock insulation performance, also has some shortcomings: the rubber serving as an organic material has limited energy consumption capacity, the aging reaction of the rubber has great influence on the durability of the support, the deformation modulus of the rubber is low, and the horizontal deformation is large, so that the support is easy to destabilize, and the rubber support is difficult to reset after a large earthquake.
Therefore, how to provide a new support to overcome the above-mentioned drawbacks is a problem to be solved.
Disclosure of Invention
In view of the above, the present invention provides an intelligent monitoring elastic skateboard support based on memory alloy, comprising: the device comprises an elastic sliding plate support, a shape memory alloy inhaul cable system and an intelligent monitoring device;
the elastic sliding plate support comprises an upper connecting plate, a lower connecting plate and a buffering and supporting system fixed between the upper connecting plate and the lower connecting plate;
the buffer and support system comprises an upper sealing plate, a lower sealing plate and a support framework arranged between the upper sealing plate and the lower sealing plate, wherein the upper sealing plate is connected with the upper connecting plate, and the lower sealing plate is in contact connection with the lower connecting plate;
the shape memory alloy inhaul cable system comprises a plurality of SMA inhaul cables, connecting rings and wedge-shaped clamps, wherein the connecting rings are respectively and correspondingly welded on the bottom surface of an upper connecting plate and the top surface of a lower connecting plate, the SMA inhaul cables respectively penetrate through the connecting rings alternately from top to bottom, the end-to-end joints of the SMA inhaul cables are connected through the wedge-shaped clamps, and prestress is applied to the SMA inhaul cables through the wedge-shaped clamps;
a plurality of upper component connecting holes are symmetrically formed in the edge of the upper connecting plate, and a plurality of lower component connecting holes are symmetrically formed in the edge of the lower connecting plate; the connecting rings are respectively arranged on the upper connecting plate and the lower connecting plate in a staggered manner with the upper component connecting holes and the lower component connecting holes;
the intelligent monitoring device comprises a spring, a strain gauge connecting piece and a data acquisition and analysis system; the strain gauge connecting piece is fixed below the upper connecting plate; the strain gauge is fixed below the strain gauge connecting piece; two ends of the spring are respectively connected with the strain gauge and the lower connecting plate; the data acquisition and analysis system is connected with the strain gauge.
Preferably, the buffering and supporting system further comprises a protective layer, and the upper sealing plate, the lower sealing plate and the supporting framework are all arranged in the protective layer;
the supporting framework consists of a rubber layer and a steel plate supporting layer which are laminated, and the center of the supporting framework is of a hollow structure, so that the horizontal rigidity is reduced, and the vertical bearing capacity can be provided;
the structure ensures that the inner rubber layer and the steel plate supporting layer do not slide when stressed.
Preferably, the upper connecting plate is connected with the upper sealing plate through bolts.
Preferably, the welding of connecting plate top surface has corrosion resistant plate down, the shrouding bottom surface is provided with the recess down, the joint has the polytetrafluoroethylene board in the recess, the polytetrafluoroethylene board with the corrosion resistant plate contact is connected.
Furthermore, the edge of the stainless steel plate is provided with a limiting ring, so that the displacement of the support is limited in the designed displacement, and the support cannot be subjected to large displacement and lose effect.
Preferably, the number of the connecting rings is 24, and the connecting rings are uniformly distributed on the upper connecting plate and the lower connecting plate; the number of the SMA inhaul cables is 6, and each inhaul cable respectively and alternately penetrates through the connecting ring arranged in the 90-degree direction from top to bottom, so that the deformation of the SMA inhaul cables can be controlled in the limit deformation when the support generates large displacement, and the super-elastic effect of the SMA can be exerted.
Preferably, the wedge-shaped clamp comprises a clamp sleeve and a prestress clamp, two ends of the SMA cable are respectively inserted into the clamp sleeve, and prestress is applied by the prestress clamp, so that the bearing capacity of the SMA cable is increased.
Preferably, the upper connecting plate and the lower connecting plate are both round steel plates.
Preferably, the SMA cable is formed by twisting 7 SMA wires, the SMA cable has super-elasticity performance and can provide a self-resetting function for the support in a limit strain range, and the 7 SMA wires are twisted to ensure that the SMA can bear certain pulling force on the function of providing the self-resetting function and increase the bearing capacity of the support.
Preferably, the data acquisition and analysis system includes a data acquisition instrument, a switch, a cloud server, a computer and analysis software connected to the strain gauge, the data acquisition instrument acquires strain gauge information and transmits the strain gauge information to the switch, the strain gauge information is transmitted to the computer and analysis software through the cloud server, and the displacement of the support is calculated through the rigidity of the spring, and the specific calculation is as follows:
F＝εEA
wherein F is the bearing stress; epsilon represents the spring strain, i.e. the relative deformation under force; e is the elastic modulus of the spring; a is the cross-sectional area of the spring; d is the support displacement; k is the spring stiffness coefficient.
Compared with the prior art, the invention discloses and provides the intelligent monitoring elastic sliding plate support based on the memory alloy, and the support has the following beneficial effects:
under the action of an earthquake, the movement of the middle framework and the upper connecting plate drives the SMA wires to move, and the earthquake energy is consumed through the high damping characteristic of the laminated rubber and the SMA wires, so that the earthquake damage of the structure is reduced;
by utilizing the super-elasticity performance of the SMA wire, after an earthquake, the strained SMA wire can automatically recover to the original length to drive the support to recover to the original position, so that the support has a self-resetting function;
through the intelligent monitoring device of this device, can survey the meeting an emergency of device through the foil gage, and then obtain the power and the displacement of whole support to data transmission to data acquisition appearance through the data line, and then transmit for the computer, reflect the atress condition of whole building through the displacement of support, in order to reach the target of control integration.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a view of the wedge clamp of the present invention;
FIG. 5 is a diagram of the application and data acquisition of the present invention;
fig. 6 is an overall structural view of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the embodiments of the present invention, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1-6, the intelligent monitoring elastic skateboard support based on memory alloy comprises: the device comprises an elastic sliding plate support, a shape memory alloy inhaul cable system and an intelligent monitoring device;
the elastic sliding plate support comprises an upper connecting plate 8, a lower connecting plate 9 and a buffering and supporting system fixed between the upper connecting plate 8 and the lower connecting plate 9;
the buffering and supporting system comprises an upper sealing plate 3, a lower sealing plate 4, a supporting framework and a protective layer 5, wherein the supporting framework is arranged between the upper sealing plate 3 and the lower sealing plate 4, and the upper sealing plate 3, the lower sealing plate 4 and the supporting framework are all arranged in the protective layer; the supporting framework consists of a rubber layer 1 and a steel plate supporting layer 2 which are laminated, and the center of the supporting framework is a hollow structure 13; the upper sealing plate 3 is connected with the upper connecting plate 8 through bolts 14, the stainless steel plate 7 is welded on the top surface of the lower connecting plate 9, the bottom surface of the lower sealing plate 4 is provided with a groove, the polytetrafluoroethylene plate 6 is clamped in the groove, the polytetrafluoroethylene plate 6 is in contact connection with the stainless steel plate 7, and the edge of the stainless steel plate 7 is provided with a limiting ring 10;
the shape memory alloy inhaul cable system comprises SMA inhaul cables 15, connecting rings 16 and wedge-shaped clamps 17, wherein the connecting rings 16 are multiple and are respectively and correspondingly welded on the bottom surface of the upper connecting plate 8 and the top surface of the lower connecting plate 9, the SMA inhaul cables 15 respectively penetrate through the connecting blocks up and down in an alternating mode, the end-to-end joints of the SMA inhaul cables 15 are connected through the wedge-shaped clamps 17, and prestress is applied to the SMA inhaul cables 15 through the wedge-shaped clamps 17;
a plurality of upper component connecting holes 11 are symmetrically formed in the edge of the upper connecting plate 8, and a plurality of lower component connecting holes 12 are symmetrically formed in the edge of the lower connecting plate 9; the connecting rings 16 are respectively arranged on the upper connecting plate and the lower connecting plate in a staggered way with the upper component connecting holes 11 and the lower component connecting holes 12;
the intelligent monitoring device comprises a spring 18, a strain gauge 19, a strain gauge connecting piece 20 and a data acquisition and analysis system; the strain gauge connecting piece 20 is fixed below the upper connecting plate 8; the strain gauge 19 is fixed below the strain gauge connecting piece 20; two ends of the spring are respectively connected with the strain gauge 19 and the lower connecting plate 9; the data acquisition and analysis system is connected with the strain gauge 19;
as shown in fig. 5, the data collecting and analyzing system includes a data collecting instrument, a switch, a cloud server, a computer and analyzing software connected to the strain gauge 19, the data collecting instrument collects information of the strain gauge 19 and transmits the information to the switch, the information is transmitted to the computer and analyzing software through the cloud server, and the displacement of the support is calculated through the stiffness of the spring, which is specifically calculated as follows:
F＝εEA
wherein F is the bearing stress; epsilon represents the amount of spring strain, i.e., the relative amount of deformation under force; e is the elastic modulus of the spring; a is the cross-sectional area of the spring; d is the support displacement; k is a spring stiffness coefficient.
The principle of the technical scheme is as follows: when vibrations such as sound production earthquakes, the support skeleton in the elastic sliding plate support absorbs and dissipates shock wave energy, and some sliding displacement may be produced to the contact surface of polytetrafluoroethylene board in this moment, shape memory alloy cable system resets after vibrations are ended and slowly pulls elastic sliding plate support structure to reset, data acquisition and analytic system can calculate the power that obtains the support and receive through the foil gage, and then calculate the displacement that obtains the support through the rigidity of spring, relevant data can be through external data line transmission to data acquisition instrument, then transmit computer and analysis software for by the high in the clouds server behind the switch, obtain the atress condition of attenuator, realize the purpose of control integration.
As shown in fig. 2, in other specific modified solutions, there are 24 connecting rings 16 uniformly distributed on the upper and lower connecting plates; the number of the SMA inhaul cables 15 is 6, and each inhaul cable respectively penetrates through the connecting rings arranged in the 90-degree direction up and down in an alternating mode.
In other specific modifications, as shown in fig. 4, the wedge clamp 17 includes a clamp sleeve 171 and a pre-stressing clamp 172, and both ends of the sma wire 15 are inserted into the clamp sleeve 171 respectively and are pre-stressed by the pre-stressing clamp 172.
In other specific improved technical solutions, the upper connecting plate 8 and the lower connecting plate 9 are both circular steel plates.
In other specific improved technical schemes, the SMA inhaul cable 15 is formed by twisting 7 SMA wires;
in other specific modified technical solutions, the SMA cable 15 is fixedly connected with the connecting ring 16.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides an intelligent monitoring elastic sliding plate support based on memory alloy which characterized in that includes: the device comprises an elastic sliding plate support, a shape memory alloy inhaul cable system and an intelligent monitoring device;
the elastic sliding plate support comprises an upper connecting plate, a lower connecting plate and a buffering and supporting system fixed between the upper connecting plate and the lower connecting plate;
the buffer and support system comprises an upper sealing plate, a lower sealing plate and a support framework arranged between the upper sealing plate and the lower sealing plate, wherein the upper sealing plate is connected with the upper connecting plate, and the lower sealing plate is in contact connection with the lower connecting plate;
the shape memory alloy inhaul cable system comprises a plurality of SMA inhaul cables, connecting rings and wedge-shaped clamps, wherein the connecting rings are respectively and correspondingly welded on the bottom surface of an upper connecting plate and the top surface of a lower connecting plate, the SMA inhaul cables respectively penetrate through the connecting rings alternately from top to bottom, the end-to-end joints of the SMA inhaul cables are connected through the wedge-shaped clamps, and prestress is applied to the SMA inhaul cables through the wedge-shaped clamps;
a plurality of upper component connecting holes are symmetrically formed in the edge of the upper connecting plate, and a plurality of lower component connecting holes are symmetrically formed in the edge of the lower connecting plate; the connecting rings are respectively arranged on the upper connecting plate and the lower connecting plate in a staggered manner with the upper component connecting holes and the lower component connecting holes;
the intelligent monitoring device comprises a spring, a strain gauge connecting piece and a data acquisition and analysis system; the strain gauge connecting piece is fixed below the upper connecting plate; the strain gauge is fixed below the strain gauge connecting piece; two ends of the spring are respectively connected with the strain gauge and the lower connecting plate; the data acquisition and analysis system is connected with the strain gauge.
2. The intelligent monitoring elastic sliding plate support based on memory alloy according to claim 1, wherein the buffering and supporting system further comprises a protective layer, and the upper sealing plate, the lower sealing plate and the supporting framework are all arranged in the protective layer;
the supporting framework is composed of a rubber layer and a steel plate supporting layer which are laminated, and the center of the supporting framework is of a hollow structure.
3. The memory alloy-based intelligent monitoring elastic skateboard support according to claim 1, wherein the upper connection plate is connected with the upper close plate through bolts.
4. The elastic skateboard support based on intelligent monitoring of memory alloy of claim 1, wherein the top surface of the lower connecting plate is welded with a stainless steel plate, the bottom surface of the lower sealing plate is provided with a groove, a polytetrafluoroethylene plate is clamped in the groove, and the polytetrafluoroethylene plate is in contact connection with the stainless steel plate.
5. A memory alloy-based intelligent monitoring elastic skateboard support according to claim 4, characterized in that the edge of the stainless steel plate is provided with a limiting ring.
6. The intelligent monitoring elastic skateboard support based on memory alloy according to claim 1, wherein the number of the connecting rings is 24, and the connecting rings are uniformly distributed on the upper connecting plate and the lower connecting plate; the number of the SMA inhaul cables is 6, and each inhaul cable respectively penetrates through the connecting ring arranged in the 90-degree direction in an up-and-down alternating mode.
7. The intelligent monitoring elastic sliding plate support based on the memory alloy according to claim 1, wherein the wedge-shaped clamp comprises a clamp sleeve and a pre-stress clamp, and two ends of the SMA cable are respectively inserted into the clamp sleeve to be pre-stressed by the pre-stress clamp.
8. The memory alloy-based intelligent monitoring elastic skateboard support according to claim 1, wherein the upper connecting plate and the lower connecting plate are both circular steel plates.
9. An intelligent monitoring elastic skateboard support based on memory alloy according to claim 1, characterized in that the SMA inhaul cable is formed by twisting 7 SMA wires.
10. The elastic skateboard support based on intelligent monitoring of memory alloy of claim 1, wherein the data acquisition and analysis system comprises a data acquisition instrument, a switch, a cloud server, a computer and analysis software connected with the strain gauge, the data acquisition instrument acquires strain gauge information and transmits the strain gauge information to the switch, the strain gauge information is transmitted to the computer and the analysis software through the cloud server, and the displacement of the support is calculated through the rigidity of the spring, and the specific calculation is as follows:
F＝εEA
wherein F is the bearing stress; epsilon represents the amount of spring strain, i.e., the relative amount of deformation under force; e is the elastic modulus of the spring; a is the cross-sectional area of the spring; d is the support displacement; k is the spring stiffness coefficient.
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Citations (7)
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| JP2000081087A (en) * | 1998-09-03 | 2000-03-21 | Sumitomo Rubber Ind Ltd | Base isolation device |
| CN203891204U (en) * | 2014-06-11 | 2014-10-22 | 安徽工业大学 | Shape memory alloy tensile rubber shock isolation support |
| CN104631626A (en) * | 2014-12-24 | 2015-05-20 | 北京工业大学 | Anti-drawing and energy-consuming isolation bearing made of cross shape memory alloy stranded wires |
| CN206681156U (en) * | 2017-03-23 | 2017-11-28 | 陕西永安减震科技有限公司 | A kind of elastic sliding bearing with marmem rope |
| CN110319989A (en) * | 2019-04-03 | 2019-10-11 | 苏州热工研究院有限公司 | The lossless detection method of spring rate in in-service spring support hanging frame |
| CN110469056A (en) * | 2019-07-05 | 2019-11-19 | 东南大学 | A kind of combined type anchorage and preparation method for fibre reinforced composites drag-line |
| CN215865323U (en) * | 2021-09-10 | 2022-02-18 | 西安诺伊传感技术有限公司 | Intelligent anti-seismic and vibration-damping support |
-
2022
- 2022-11-01 CN CN202211357339.8A patent/CN115573478B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000081087A (en) * | 1998-09-03 | 2000-03-21 | Sumitomo Rubber Ind Ltd | Base isolation device |
| CN203891204U (en) * | 2014-06-11 | 2014-10-22 | 安徽工业大学 | Shape memory alloy tensile rubber shock isolation support |
| CN104631626A (en) * | 2014-12-24 | 2015-05-20 | 北京工业大学 | Anti-drawing and energy-consuming isolation bearing made of cross shape memory alloy stranded wires |
| CN206681156U (en) * | 2017-03-23 | 2017-11-28 | 陕西永安减震科技有限公司 | A kind of elastic sliding bearing with marmem rope |
| CN110319989A (en) * | 2019-04-03 | 2019-10-11 | 苏州热工研究院有限公司 | The lossless detection method of spring rate in in-service spring support hanging frame |
| CN110469056A (en) * | 2019-07-05 | 2019-11-19 | 东南大学 | A kind of combined type anchorage and preparation method for fibre reinforced composites drag-line |
| CN215865323U (en) * | 2021-09-10 | 2022-02-18 | 西安诺伊传感技术有限公司 | Intelligent anti-seismic and vibration-damping support |
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