Electrovibration test device for gradient porous dielectric medium
By designing an electro-vibration testing device for gradient porous dielectrics, and using distance and pressure sensors to automatically measure the deformation and load of the dielectric, the problem of low measurement efficiency of dielectric elastomer actuators is solved, and efficient force-displacement curve testing is realized.
Patent Information
- Application Number
- CN202422695315.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-05
AI Technical Summary
In the existing technology, the deformation and load measurement efficiency of dielectric elastomer actuators is low, and it is not possible to conduct force-displacement curve tests efficiently, especially the acquisition of electro-induced vibration data of gradient porous dielectrics is difficult.
An electro-vibration testing device for a gradient porous dielectric was designed, comprising a base plate, a sliding plate, a distance sensor, and a pressure sensor. The displacement and pressure of the dielectric are detected by extending and retracting the movable support. The deformation and load of the dielectric are automatically measured using the distance sensor and the pressure sensor.
It automates and improves the efficiency of deformation and load measurement of dielectric elastomer actuators, simplifies the testing process, and improves measurement accuracy and efficiency.
Smart Images
Figure CN223565100U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of dielectric elastomers, and in particular to an electric vibration test device for gradient porous dielectric. BACKGROUND
[0002] Dielectric elastomers have electrostrictive characteristics and can be used as power sources for next-generation soft robot drivers. When an external electric field is applied to the dielectric elastomers, the molecules inside the dielectric elastomers are polarized under the action of the electric field, so that the positive and negative poles of the molecules are directed to the two electrodes of the electric field. The molecules in the dielectric elastomers are deflected under the action of the electromagnetic dipole moment, and the dielectric elastomers are stretched or contracted along the direction of the electric field. The upper and lower surfaces of the dielectric elastomers are pasted with electrodes, and the middle is an elastic material with high dielectric constant.
[0003] Since there is no specific theoretical basis for the deformation degree and bearing capacity of dielectric elastomers under different electric fields at present, after the dielectric elastomers are made into drivers, force-displacement curve tests need to be performed on the dielectric elastomer drivers. That is, under different electric fields, the deformation size and load size of the dielectric elastomers are detected.
[0004] The dielectric elastomer driver is mainly a linear driver, and the structure includes a rhombus, a butterfly, a cylinder, a cone, and a folded shape, etc. Among them, the cylindrical driver can be stretched and contracted along the axial direction, and the butterfly driver can be expanded and contracted towards the four sides of the butterfly plane.
[0005] For gradient porous dielectric, the deformation capacity and load capacity will also be affected by the internal pore doping amount. In order to obtain the electric vibration data of the porous dielectric, a large number of stretching and load measurements need to be performed.
[0006] In the existing driver test, the deformation size is mainly measured manually by using a measuring ruler, and the load size is detected by reconnecting the force sensor for stretching.
[0007] In order to facilitate the test personnel to more efficiently perform the force-displacement curve test of the dielectric elastomer, the present application provides an electric vibration test device for gradient porous dielectric. CONTENT OF THE INVENTION
[0008] In order to overcome the problems in the related art, the present application provides an electric vibration test device for gradient porous dielectric, comprising:
[0009] A bottom plate and a sliding plate are sequentially arranged at opposite ends of the movable support; and the direction of the bottom plate towards the sliding plate is the top direction;
[0010] A to-be-measured dielectric accommodating cavity is arranged between the top surface of the bottom plate and the bottom surface of the sliding plate;
[0011] The sliding plate is movably connected to the movable support through a fixing rod, and the fixing rod is connected to the two ends of the movable support along the length direction of the fixing rod.
[0012] The upper side of the sliding plate is provided with a distance measuring sensor and a pressure sensor, the distance measuring sensor is used for detecting the distance between the sliding plate and the distance measuring sensor, and the pressure sensor is provided with a pressure sensing surface facing the sliding plate.
[0013] In an embodiment, the movable support is provided with a first movable clamping plate and a second movable clamping plate spliced along the top direction; the bottom plate is fixed on the first movable clamping plate, and the distance measuring sensor and the pressure sensor are fixed on the second movable clamping plate; the first movable clamping plate is provided with a clamping groove, the shape of the clamping groove is matched with the shape of the second movable clamping plate; a strip-shaped hole is formed in the groove wall of the clamping groove along the first direction, a fixing bolt is arranged in the strip-shaped hole, and the fixing bolt abuts against the second movable clamping plate through the strip-shaped hole.
[0014] In an embodiment, the distance measuring sensor is an inductive distance measuring sensor, and the distance measuring sensor comprises a transmitting coil and a receiving coil.
[0015] The transmitting coil is fixed on the top surface of the sliding plate, and the receiving coil is fixed on the second movable clamping plate.
[0016] In an embodiment, the pressure support rod is further included; one end of the pressure support rod is connected to the top surface of the sliding plate, and the other end faces the pressure sensing surface.
[0017] In an embodiment, the second movable clamping plate further comprises a limiting plate; the plate surface of the limiting plate is arranged above the sliding plate in a direction perpendicular to the top direction; the pressure support rod and the fixing rod pass through the limiting plate through through-holes in the limiting plate; and the distance measuring sensor is fixed on the limiting plate.
[0018] In an embodiment, the second movable clamping plate is provided with a sliding plate containing groove; the limiting plate is fixed in the sliding plate containing groove, and the pressure sensor is fixed on the inner wall of the sliding plate containing groove.
[0019] The technical scheme provided in the application can have the following beneficial effects:
[0020] In the present application, the target of detection is switched by adjusting the length of the movable support. When detecting the electrostrictive distance, the movable support is lengthened, the dielectric body to be detected is fixed in the dielectric body accommodating cavity, and the distance of the sliding plate is detected by the distance measuring sensor. When detecting the electrostrictive pressure, the movable support is shortened, so that the pressure sensor abuts against the sliding plate, and then the pressure value output by the dielectric body is detected by the pressure sensor.
[0021] It should be understood that the general description above and the following detailed description are only exemplary and explanatory, and are not limiting to the present application. BRIEF DESCRIPTION OF DRAWINGS
[0022] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and in which:
[0023] Figure 1 A first structural schematic diagram of an electro-vibration test device shown in an embodiment of the present application;
[0024] Figure 2 A second structural schematic diagram of an electro-vibration test device shown in an embodiment of the present application;
[0025] Brief description of the drawings: first movable clamping plate 1, bottom plate 10, sliding plate 11, fixed rod 12, pressure support rod 13, distance measuring sensor 20, pressure sensor 21, second movable clamping plate 2, strip-shaped hole 22, limiting plate 23, sliding plate accommodating groove 24, dielectric body accommodating cavity 3 to be detected. DETAILED DESCRIPTION
[0026] The preferred embodiments of the present application will be described in more detail by referring to the attached drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application is fully conveyed to those skilled in the art.
[0027] The terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.
[0028] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0029] In existing drive tests, the deformation is mainly measured manually using a ruler, while the load is measured by reconnecting a force sensor for tensile testing.
[0030] To facilitate more efficient force-displacement curve testing of dielectric elastomers, this application provides an electro-induced vibration testing device for gradient porous dielectrics, such as... Figure 1 As shown, it includes: a base plate 10 and a sliding plate 11 arranged sequentially at opposite ends on the movable support.
[0031] The top direction is defined as the direction in which the base plate 10 faces the sliding plate 11.
[0032] like Figure 1 As shown, a dielectric material receiving cavity 3 is provided between the top surface of the base plate 10 and the bottom surface of the sliding plate 11. The sliding plate 11 is movably connected to the movable bracket via a fixing rod 12, the two ends of which are connected to the two ends of the movable bracket along the top direction. A distance sensor 20 and a pressure sensor 21 are provided above the sliding plate 11. The distance sensor 20 is used to detect the distance between the sliding plate 11 and the distance sensor 21. The pressure sensor 21 is provided with a pressure sensing surface facing the sliding plate 11.
[0033] Furthermore, the movable support is used to extend and retract along the top direction.
[0034] In this embodiment, the target to be detected is switched by adjusting the length of the movable support. When detecting electrostrictive distance, the movable support is lengthened to fix the dielectric to be detected within the dielectric receiving cavity, and the distance to the sliding plate is detected by a distance sensor. When detecting electrostrictive pressure, the movable support is shortened so that the pressure sensor abuts against the sliding plate, and then the pressure value output by the dielectric is detected by the pressure sensor.
[0035] Further, the movable support is provided with a first movable clamping plate 1 and a second movable clamping plate 2 which are spliced along the top direction. The bottom plate 10 is fixed on the first movable clamping plate 1, and the distance measuring sensor 20 and the pressure sensor 21 are fixed on the second movable clamping plate 2. The first movable clamping plate 1 is provided with a clamping groove, and the shape of the clamping groove is matched with the shape of the second movable clamping plate 2; a strip-shaped hole 22 is formed on the groove wall of the clamping groove along the first direction, and a fixing bolt is arranged in the strip-shaped hole 22, and the fixing bolt abuts against the second movable clamping plate 2 through the strip-shaped hole 22.
[0036] Specifically, the second movable clamping plate 2 is installed in the clamping groove of the first movable clamping plate 1. The two are embeddedly matched. The slotting direction of the clamping groove is the top direction, so that the second movable clamping plate 2 can move along the top direction. At the same time, the strip-shaped hole 22 is formed on the clamping groove, and when the position of the second movable clamping plate 2 is adjusted, the fixing bolt is tightened to complete the fixing.
[0037] In the embodiment of the present application, as shown in Figure 2 When the deformation curve of the dielectric elastomer is measured, the distance between the first movable clamping plate 1 and the second movable clamping plate 2 needs to be pulled apart, so that the pressure support rod 13 is away from the pressure sensor 21.
[0038] When the pressure curve of the dielectric elastomer is measured, as shown in Figure 1 the distance between the first movable clamping plate 1 and the second movable clamping plate 2 is narrowed, so that the pressure support rod 13 can abut on the pressure sensor 21.
[0039] Further, the second movable clamping plate 2 is provided with a sliding plate containing groove 24. The pressure sensor 21 is fixed in the sliding plate containing groove 24.
[0040] Further, in order to fix the displacement measuring rod and the pressure measuring rod to move in the first direction, the second movable clamping plate 2 further comprises a limiting plate 23. Specifically, the plate surface of the limiting plate 23 is arranged between the sliding plate 11 and the pressure sensor 21 and is perpendicular to the first direction.
[0041] Preferably, the distance measuring sensor is an inductive distance measuring sensor, which comprises a transmitting coil and a receiving coil; the transmitting coil is fixed on the top surface of the sliding plate, and the receiving coil is fixed on the second movable clamping plate. The pressure sensor 21 is a pressing pressure sensor, which outputs different electric signals by detecting the force of the pressure support rod 13 on the pressure sensing surface.
[0042] Preferably, the pressure sensor 21 and the distance measuring sensor 20 are provided with a data transmission line for transmitting pressure detection data and distance measuring detection data. The data transmission line can be a 4-20mA signal line.
[0043] Before displacement measurement, first, the movable support is lengthened in the first direction, then the bottom of the dielectric elastomer in the axial direction is pasted on the top surface of the bottom plate 10, and the top of the dielectric elastomer is pasted on the bottom surface of the sliding plate 11, preventing the pressure transmission rod from abutting against the pressure sensor 21. At this time, the sliding plate 11 is in a free sliding state.
[0044] During displacement measurement, the dielectric elastomer is connected with an electric field at both ends, and the sliding distance of the sliding plate 11 on the displacement measurement rod is read by the distance measuring sensor 20. Sampling the distance measuring sensor 20 can obtain the displacement curve under the preset electric field.
[0045] Before pressure measurement, first, the movable support is shortened in the first direction, then the dielectric elastomer is installed between the sliding plate 11 and the bottom plate 10, and the top end of the pressure measurement rod abuts against the pressure sensor 21.
[0046] During pressure measurement, the dielectric elastomer is electrified to generate electro-vibration, and the sliding plate 11 moves towards the first direction under the drive of the dielectric elastomer. Therefore, the top end of the pressure measurement rod continuously applies pressure to the pressure sensor 21. Sampling the pressure sensor 21 can obtain the pressure curve under the preset electric field.
[0047] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical application, or improvement of technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.
Claims
1. An electrodynamic vibration testing apparatus of a gradient porous dielectric, characterized by, The utility model relates to a dielectric body testing device, including: The bottom plate (10) and the sliding plate (11) are arranged on the opposite ends of the movable support in sequence; The direction that the bottom plate (10) is towards the sliding plate (11) is the top direction, and the movable support is used to stretch out and shrink along the top direction; The top surface of the bottom plate (10) and the bottom surface of the sliding plate (11) are provided with a dielectric body accommodating cavity (3); The sliding plate (11) is movably connected on the movable support through a fixed rod (12), and the length direction both ends of the fixed rod (12) are connected on the both ends of the movable support along the top direction; The upper side of the sliding plate (11) is provided with a distance measuring sensor (20) and a pressure sensor (21), the distance measuring sensor (20) is used to detect the distance between the sliding plate (11) and the distance measuring sensor (20), and the pressure sensor (21) is provided with a pressure sensing surface, and the pressure sensing surface is towards the sliding plate (11).
2. The apparatus according to claim 1, wherein The utility model relates to a dielectric body testing device, including: The movable support is provided with a first movable clamping plate (1) and a second movable clamping plate (2) spliced along the top direction; The bottom plate (10) is fixed on the first movable clamping plate (1), and the distance measuring sensor (20) and the pressure sensor (21) are fixed on the second movable clamping plate (2); The first movable clamping plate (1) is provided with a clamping groove, and the shape of the clamping groove is matched with the shape of the second movable clamping plate (2); A strip hole (22) is formed in the groove wall of the clamping groove along a first direction, a fixed bolt is arranged in the strip hole (22), and the fixed bolt abuts against the second movable clamping plate (2) through the strip hole (22).
3. The apparatus according to claim 2, wherein The distance measuring sensor (20) is an inductive distance measuring sensor (20), and the distance measuring sensor (20) comprises a transmitting coil and a receiving coil; The transmitting coil is fixed on the top surface of the sliding plate (11), and the receiving coil is fixed on the second movable clamping plate (2).
4. The apparatus according to claim 1, wherein Further comprising a pressure support rod (13); One end of the pressure support rod (13) is connected to the top surface of the sliding plate (11), and the other end is towards the pressure sensing surface.
5. The apparatus for the electric vibration test of the gradient porous dielectric according to claim 2, wherein The second movable clamping plate (2) further comprises a limiting plate (23); The plate surface of the limiting plate (23) is arranged above the sliding plate (11) perpendicularly to the top direction; The pressure support rod (13) and the fixed rod (12) pass through the limiting plate (23) through the through hole on the limiting plate (23); The distance measuring sensor (20) is fixed on the limiting plate (23).
6. The apparatus according to claim 5, wherein The second movable clamping plate (2) is provided with a sliding plate accommodating groove (24); The limiting plate (23) is fixed in the sliding plate accommodating groove (24), and the pressure sensor (21) is fixed on the inner wall of the sliding plate accommodating groove (24).