Special-shaped structure deformation sensor and monitoring system thereof

Abstract

The invention discloses a special-shaped structure deformation sensor and a monitoring system thereof, and relates to the technical field of structure health monitoring. According to the design of a complex curved surface, a plurality of electrode array layers are printed on a substrate film layer of a special-shaped structural body, the electrode array layers can be tightly attached to the complex curved surface, and strain data of each position of the curved surface are obtained by integrating the electrode array layers. The detected deformation data is transmitted to the display in real time to realize data visualization, and a low-power-consumption wireless communication technology is introduced, so that the strain force data collected in real time can be sent to the display under the condition of no shielding, and remote monitoring is supported; the special-shaped structure body in the application is an object needing to be monitored, so that the sensor manufactured by the electronic jet printing device can flexibly adapt to various special-shaped structures with complex curved surfaces. And a scientific basis is provided for health monitoring, optimization design and safety evaluation of the structure.

Description

Technical Field

[0001] The present invention relates to the technical field of structural health monitoring, and particularly relates to a deformed sensor for special-shaped structures and its monitoring system. Background Art

[0002] With the continuous emergence of special-shaped structures in modern engineering, most existing sensors use rigid materials and are difficult to fit tightly on structures with complex curved surfaces. Therefore, it is difficult to accurately monitor the deformation at specific positions on complex curved surfaces, which seriously hinders the comprehensive and accurate understanding of the structural health status. At the same time, most current monitoring systems rely on technologies with a relatively low level of user interface in data processing and are difficult to build an intuitive and dynamic visualization model, thus affecting the decision-making effect.

[0003] In addition, most existing deformation monitoring systems also rely on wired connection methods, which not only increase the complexity of wiring but also greatly limit the flexible arrangement range and usage environment of sensors. In summary, traditional deformation monitoring technologies are unable to meet the monitoring requirements for complex curved surfaces. Summary of the Invention

[0004] The purpose of the present invention is to provide a deformed sensor for special-shaped structures and its monitoring system, which can obtain the strain data at each position on the curved surface and display the strain conditions at each position on the curved surface, providing a scientific basis for the structural health monitoring, optimal design, and safety assessment.

[0005] To achieve the above purpose, the technical solution of the present application is: a deformed sensor for special-shaped structures, which is made by an electrospray printing device; the electrospray printing device includes:

[0006] A dual-track micro syringe filled with base material ink and electrode material ink inside;

[0007] A micro injection pump connected to the dual-track micro syringe, and the micro injection pump controls the feeding amount through a set feeding speed;

[0008] A base spray needle head connected to the bottom of the dual-track micro syringe, and the base material ink flows out through the base spray needle head;

[0009] An electrode spray needle head connected to the bottom of the dual-track micro syringe, and the electrode material ink flows out through the electrode spray needle head.

[0010] As a preferred solution of the present invention, the electrospray printing device further includes:

[0011] An xy-plane rotation axis located below the base spray needle head and the electrode spray needle head and connected to the host computer;

[0012] The z-axis rotation axis is respectively connected to the xy-plane rotation axis and the host computer;

[0013] The heating platform is used to carry the z-axis rotation axis and is connected to the host computer.

[0014] As a preferred embodiment of the present invention, the substrate injection needle tip and the electrode injection needle tip are connected to the positive pole of the high-voltage DC power supply, and the negative pole of the high-voltage DC power supply is connected to the heating platform.

[0015] As a preferred embodiment of the present invention, under the action of the high-voltage DC power supply, the substrate injection needle tip uniformly sprays the substrate material ink in the form of electrospray on the special-shaped structure body to form the substrate thin film layer of the special-shaped structure deformation sensor; under the action of the high-voltage DC power supply, the electrode injection needle tip sprays the electrode material ink in the form of electrospray on the substrate thin film layer to form the electrode array layer of the special-shaped structure deformation sensor.

[0016] As a preferred embodiment of the present invention, when spraying the substrate material ink and the electrode material ink, the xy-plane rotation axis and the z-axis rotation axis are controlled by the host computer to adjust the printing angle and direction.

[0017] As a preferred embodiment of the present invention, the substrate material ink is an acetone pvp mixed solution, and the thickness of the formed substrate thin film layer is 50 μm to 1 mm

[0018] As a preferred embodiment of the present invention, the electrode material ink is a silver nanometer mixed solution, and the thickness of the formed electrode array layer is 10 μm to 50 μm.

[0019] The present invention also provides a monitoring system for a special-shaped structure deformation sensor, including an electrode measurement module, a wireless transmission module and a display. The electrode measurement module is connected to the electrode array layer for collecting strain force signals, and the collected strain force signals are transmitted to the display through the wireless transmission module.

[0020] As a preferred embodiment of the present invention, the electrode measurement module includes a signal collector and a signal amplifier connected to each other. The signal collector is connected to the electrode array layer to form an electric field structure for measuring the real-time changes of the special-shaped structure body.

[0021] As a preferred embodiment of the present invention, the wireless transmission includes a signal emitter and a signal receiver; the strain force signal is transmitted from the signal amplifier to the signal emitter, received through the signal receiver, and displayed on the display.

[0022] Due to the adoption of the above technical solutions, the present invention can achieve the following technical effects:

[0023] 1. The special-shaped structure in this application is the object to be monitored. Therefore, the sensor fabricated by the electrospray printing device can flexibly adapt to the special-shaped structures of various complex curved surfaces.

[0024] 2. The specific deformation of the special-shaped structure can be accurately monitored through the electrode array layer.

[0025] 3. This application can display the deformation process and the occurrence location on the display in real time.

[0026] 4. For tiny structures, multiple electrode array layers are configured to sense the subtle changes of the object and cooperate to display the deformation of the structure.

[0027] 5. This sensor can achieve wireless signal transmission and is applicable to the measurement requirements under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is the structural schematic diagram of the electrospray printing device;

[0030] Figure 2 is the structural schematic diagram of the special-shaped structure deformation sensor;

[0031] Figure 3 is the structural schematic diagram of the electrode measurement module;

[0032] Figure 4 is the connection schematic diagram of the wireless transmission module and the display;

[0033] Explanation of the reference numerals in the figures: 1, micro-injection pump; 2, substrate injection needle tip; 3, xy-plane rotation axis; 4, dual-track micro-injector; 5, electrode injection needle tip; 6, special-shaped structure; 7, z-axis rotation axis; 8, heating platform; 9, host computer; 10, microscope; 11, observation illuminating lamp; 12, high-voltage DC power supply; 13, signal collector; 14, substrate thin film layer; 15, electrode array layer; 16, signal amplifier; 17, display; 18, signal receiver; 19, signal emitter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further elaborates on this application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] Example 1

[0040] Please refer to Figure 1-2, this embodiment provides a deformed sensor with a special-shaped structure, which is designed for complex curved surfaces and fabricated by an electrospray printing device; the electrospray printing device includes a micro-injection pump 1, a substrate spray needle tip 2, an xy-plane rotating shaft 3, a double-track micro-injector 4, an electrode spray needle tip 5, a special-shaped structure body 6, a z-axis rotating shaft 7, a heating platform 8, a host computer 9, a microscope 10, an observation lighting lamp 11, and a high-voltage DC power supply 12; among them, the double-track micro-injector 4 is installed on the micro-injection pump 1, and its double cavities are respectively filled with substrate material ink and electrode material ink. The micro-injection pump 1 pushes the double-track micro-injector 4 to feed precisely at a set flow rate; the substrate spray needle tip 2 and the electrode spray needle tip 5 are arranged at the bottom of the double-track micro-injector 4. When the substrate spray needle tip 2 and the electrode spray needle tip 5 spray ink, under the action of the high-voltage DC power supply 12, a stable and fine electrospray forms a uniformly covered substrate thin film layer and an electrode array layer on the special-shaped structure body 6. During the spraying process, the observation lighting lamp 11 is turned on to provide light, and the ink droplet situation is observed through the microscope 10.

[0041] The preparation methods of the substrate thin film layer and the electrode array layer are as follows: the substrate material ink is selected as an acetone pvp mixed solution, and the electrode material ink is a nano-silver mixed solution. The two solutions are respectively filled in the cavities of the double-track micro-injector. The special-shaped structure body is fixed on the heating platform 8, and the xy-plane rotating shaft 3 and the z-axis rotating shaft 7 are controlled by the host computer 9 to adjust the printing angle and direction to meet the printing requirements of different materials; the output voltage range of the high-voltage DC power supply connected to the substrate spray needle tip is 2000 - 7000V, and the output voltage range of the high-voltage DC power supply connected to the electrode spray needle tip is 4000 - 6500V; the micro-injection pump respectively pushes the acetone pvp mixed solution and the nano-silver mixed solution to the substrate spray needle tip and the electrode spray needle tip. Under the action of electric fields, gravitational fields, etc., a stable Taylor cone is formed, so that the acetone pvp mixed solution is spray-printed onto the surface of the special-shaped structure body. During the spraying process, the heating platform 8 works to remove the co-solvent inside, and the substrate thin film layer 14 is prepared by layer-by-layer stacking, with a preferred thickness of 50μm to 1mm; the nano-silver mixed solution is spray-printed onto the surface of the substrate thin film layer, and the electrode array layer 15 is prepared by layer-by-layer stacking, with a preferred thickness of 10μm to 50μm; the sensitivity of the sensor is adjusted by the printing thickness to achieve measurements at various positions.

[0042] It should be noted that the substrate thin film layer 14 can be printed in different shapes according to the specific required dimensions; the electrode array layer 15 is prepared on the substrate thin film layer 14 to achieve better electrode adhesion, and leads are drawn on the electrode array layer.

[0043] Embodiment 2

[0044] Please refer to Figure 3-4, this embodiment provides a monitoring system for a deformed sensor with a special-shaped structure, which includes an electrode measurement module, a wireless transmission module, and a display. The electrode measurement module includes a signal collector and a signal amplifier connected to each other. The signal collector is connected to an electrode array layer to form an electric field structure, which is used to measure the real-time changes of the special-shaped structure body and reduce errors. The wireless transmission includes a signal transmitter and a signal receiver; the strain force signal is transmitted from the signal amplifier to the signal transmitter, received by the signal receiver, and displayed on the display.

[0045] Apply a force of 9 N to the special-shaped structure body, and it is transmitted to the signal transmitter through the signal collector and the signal amplifier, and then transmitted to the display by the signal receiver to display the specific strain part and the magnitude of the strain force.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A special-shaped structural deformation sensor, characterized in that: It is made by an electro-jet printing device; the electro-jet printing device comprises: A double-track micro-syringe, which contains base material ink and electrode material ink; A micro-injection pump is connected to the double-track micro-injection syringe, and the micro-injection pump controls the feeding amount by setting the feeding speed; A substrate spray needle head is connected to the bottom of the double-track micro-injector, and the substrate material ink flows out through the substrate spray needle head; The electrode spray needle tip is connected to the bottom of the double-track micro-injector, and the electrode material ink flows out through the electrode spray needle tip.

2. The special-shaped structural deformation sensor according to claim 1, characterized in that: The electrospray printing device further comprises: The xy plane rotation axis is located below the substrate spray needle tip and the electrode spray needle tip and is connected to the host computer; The z-axis rotation axis is connected to the xy plane rotation axis and the host computer respectively; The heating platform is used to carry the z-axis rotation axis and is connected to the host computer.

3. The special-shaped structural deformation sensor according to claim 2, characterized in that: The substrate spray needle tip and the electrode spray needle tip are connected to the positive electrode of the high-voltage direct current power supply, and the negative electrode of the high-voltage direct current power supply is connected to the heating platform.

4. The special-shaped structural deformation sensor according to claim 3, characterized in that: Under the action of a high-voltage DC power supply, the substrate spray needle uniformly sprays the substrate material ink on the special-shaped structure in the form of an electric jet to form a substrate film layer of the special-shaped structure deformation sensor; Under the action of a high-voltage DC power supply, the electrode spray needle sprays the electrode material ink onto the base film layer in the form of an electric jet to form an electrode array layer of the special-shaped structure deformation sensor.

5. The special-shaped structural deformation sensor according to claim 4, characterized in that: When the base material ink and the electrode material ink are ejected, the printing angle and direction are adjusted by controlling the xy plane rotation axis and the z axis rotation axis through the host computer.

6. The special-shaped structural deformation sensor according to claim 4, characterized in that: The base material ink is an acetone-PVP mixed solution, and the thickness of the base film layer formed by the ink is 50 μm to 1 mm.

7. The special-shaped structural deformation sensor according to claim 4, characterized in that: The electrode material ink is a nano-silver mixed solution, and the electrode array layer formed by the ink has a thickness of 10 μm to 50 μm.

8. A monitoring system for a special-shaped structure deformation sensor, characterized in that: It includes an electrode measurement module, a wireless transmission module and a display. The electrode measurement module is connected to the electrode array layer and is used to collect strain force signals. The collected strain force signals are transmitted to the display through the wireless transmission module.

9. The monitoring system of the special-shaped structure deformation sensor according to claim 8, characterized in that: The electrode measurement module includes a connected signal collector and a signal amplifier, wherein the signal collector is connected to the electrode array layer to form an electric field structure for measuring the real-time changes of the special-shaped structure.

10. The monitoring system of the special-shaped structure deformation sensor according to claim 9, characterized in that: The wireless transmission includes a signal transmitter and a signal receiver; the strain force signal is transmitted from the signal amplifier to the signal transmitter, received by the signal receiver, and displayed on a display.

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