CN110174704B - Ocean electric field sensor based on TRIZ theory - Google Patents

Abstract

The invention is an ocean electric field sensor based on the TRIZ concept. Based on the TRIZ concept and on the basis of matter-field analysis, the problem to be solved by the present invention is: the structure of the current ocean electric field sensor is complex, which cannot meet the current demand for ocean research and adapt to the complex ocean environment. To achieve the above object, the present invention provides the following technical solution, a marine electric field sensor based on the TRIZ concept, including an electrode 1; a current collector 2; a sealing layer 3; and a wire 4. The electrode 1 is a sheet-like structure made of carbon fiber, where one side of the electrode 1 is in contact with seawater, and the other side is covered with a layer of current collector 2 and connected to a wire 4, where the current collector 2 is made of conductive metal, and its purpose is to collect carbon fiber The electrical signal is transmitted to the detection equipment through the wire 4, and the outer surface of the current collector 2 is covered with a sealing material to prevent the current collector 2 from contacting seawater.

Description

A marine electric field sensor based on TRIZ concept

technical field

The invention relates to the technical field of ocean detection, in particular to a micro carbon fiber electrode suitable for deep sea based on the concept of TRIZ.

technical background

The electric field is a physical field widely distributed in the ocean. Factors such as the flow and migration of seawater, biological movement, changes in the earth's magnetic field, and redox reactions of ships and seabed metal ore bodies are all reasons for the generation of ocean electric fields. The detection of marine electric field can be widely used in civilian fields such as marine resource exploration and geographical environment monitoring, as well as in military fields such as monitoring, tracking, and positioning of underwater targets. Two electrodes are commonly used to form an electrode pair. By monitoring the change of the electrode pair over time, the change of the electric field medium environment in the marine environment can be revealed. The marine electric field sensor works in the marine environment and needs to resist the influence of pressure on the electrode; seawater is rich in various ions, and various chemical reactions will occur; in addition, due to technical limitations, the electrode will also be affected by the seawater pressure in the ocean. Various external forces make it difficult to place the electrodes. With the development and detection of the ocean from the near sea to the far sea, from the shallow sea to the deep sea, the deep sea exploration equipment is gradually becoming intensive and integrated, and the requirements for marine electric field sensors are higher. In addition to the high sensitivity and low noise of general electric field sensors , but also be able to resist pressure, small in size, easy to deploy and integrate and carry other exploration equipment. The silver/silver chloride electrode is a non-polarized electrode with good stability, but its performance is limited by the volume/surface area ratio and the particularity of the processing technology, so the application of the silver chloride electrode in the deep sea environment is limited. The existing marine electric field sensor electrodes are mainly electrochemical electrodes. Although the electron migration speed inside the electrode is fast, the electrode will be polarized during use, and there will also be a problem of irreversible polarization, which will directly lead to the failure of the sensor. Sensitivity is reduced. Carbon fiber electrodes are polarized electrodes, which are very sensitive to changes in the electric field in the medium. The specific surface area is 100-1000 times that of silver chloride electrodes. It is an ideal material for making sensor electrodes. Patent No. CN202662303U provides an ultra-fine carbon fiber electrode, which is small in size and easy to manufacture. However, because the ultra-fine carbon fiber electrode uses a glass tube as the shell, it is fragile and is not suitable for the high-voltage environment of the deep sea. Patent No. CN2387538Y discloses a low-noise carbon fiber ultramicro electrode, which has excellent electrochemical performance, low noise and no leakage. However, the working environment of this electrode is relatively closed and stable, and the manufacturing process requires high requirements, so it is difficult to make it in a general laboratory, so it is not suitable for deep sea environment. CN103048368A also discloses a preparation method of an ultramicroelectrode, which is similar to the previous CN2387538Y, and is also assembled in a glass tube. The test environment is special, and it is also not suitable for deep sea. The carbon fiber sensors reported publicly at present have very limited foreign materials, and some parameters are incomplete, so they cannot be compared. Shen Zhen of the Naval University of Engineering (Shen Zhen et al., 2018) prepared a carbon fiber marine electric field electrode with a self-noise of 1nV/√Hz@1Hz. The total length of the electrodes is 14 cm. Although the volume has been reduced, it is still a bit large compared to the space of detection instruments in actual ocean exploration. Liu Ang from Ocean University of China reported a modified carbon fiber marine electric field electrode. The structure is copper-plated on the outside of carbon fiber, sealed with epoxy resin, and the overall structure is rigid and not pressure-resistant.

TRIZ theory is the most representative product innovation design method based on knowledge in various scientific fields. It analyzes a large number of invention patents and summarizes the theoretical methods followed to solve technical problems and create inventions, which can point out the direction for designers to solve problems. TRIZ theory has distinctive features and advantages. It successfully reveals the inherent laws and principles of creation and invention, and focuses on clarifying and emphasizing the contradictions in the system, rather than evading them. Its goal is to completely resolve contradictions and obtain the ultimate ideal solution, rather than adopting compromise or compromise. , and it is based on the law of technological development and evolution to study the entire design and development process, rather than random behavior. Practice has proved that using TRIZ theory can greatly speed up the process of people creating inventions and can obtain high-quality innovative products. It can help us systematically analyze the problem situation, quickly discover the essence or contradiction of the problem, it can accurately determine the direction of problem exploration, break through the barriers of thinking, break the stereotype of thinking, analyze the problem with a new vision, and carry out systematic thinking, according to the law of technological evolution Predict future development trends and help us develop competitive new products.

Contents of the invention

The problem to be solved by the present invention is that the structure of the current ocean electric field sensor is complex, cannot meet the current demand for ocean research and cope with the complex ocean environment. Aiming at the above problems, a new type of marine electric field sensor is proposed to solve the above problems. Using TRIZ theory to analyze and innovate the shortcomings of this kind of existing ocean electric field sensor technology, improve the usability of sensors in the ocean, and improve the shortcomings of existing technologies. The invention is a miniature carbon fiber electrode suitable for deep sea based on the TRIZ concept.

In order to achieve the above object, the present invention provides the following technical solution, a marine electric field sensor, comprising an electrode 1; a current collector 2; a sealing layer 3; and a wire 4. The electrode 1 is a sheet-like structure made of carbon fiber, where one side of the electrode 1 is in contact with seawater, and the other side is covered with a layer of current collector 2 and connected to a wire 4. The current collector 2 is made of conductive metal, and its purpose is to collect electricity. The signal is transmitted to the detection equipment through the wire 4, and the outer surface of the current collector 2 is covered with a sealing material to prevent the metal from contacting seawater. Adhesives can be used outside the sealing layer 3 to attach the electrode sensor to the surface of other objects for fixing.

Compared with the existing technology, the volume of the marine electric field electrode is greatly reduced, and the requirements for electrode installation are lower; it can also be placed with other instruments and equipment; the shape can also be changed with different experimental plans and experimental locations, and it is worthy of vigorous promotion.

Description of drawings

Figure 1 is a structural diagram of a marine electric field sensor based on the TRIZ concept;

Among the reference signs: A-front view, B-sectional view, C-sectional enlarged view, 1-electrode, 2-collector, 3-sealing layer, 4-lead.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Based on the TRIZ principle, the present invention analyzes the gap between the existing marine electric field sensor and the ideal state, classifies it as a TRIZ problem, and clarifies the conflict area. Using the conflict matrix, a new design idea for the marine electric field sensor is proposed. The following problems occurred during the design process: 1. The structure of the sensor is strengthened, but the applicability to various environments becomes worse due to the increase in volume; 2. Simplification of the marine electric field sensor will lead to poor stability parameters.

To analyze problem 1, because the traditional electric field electrode needs a series of protective shells to strengthen the mechanical properties of the electrode core, but the system is relatively large in size and cannot adapt to various environmental conditions, the problem is standardized: structural stability is improved, but the adaptability is deteriorated, and the corresponding invention principle "30 flexible shell or film" to solve this conflict problem can be obtained through conflict matrix query. The principle enlightenment obtained is: make the electrode into a flexible structure.

Analyzing problem 2, the structure of the electric field sensor in the prior art is complex, but the stability of the sensor will become poor after the structure of the sensor is simplified, and it cannot work normally. Normalize the problem: device complexity improves, but structural stability deteriorates. Through the conflict matrix query, the corresponding invention principle "17-dimensional change" to solve this conflict problem can be obtained. The principle enlightenment obtained is: change the electrode into a sheet structure, and only make one side of the electrode contact seawater to collect electrical signals.

According to FIG. 1 , a micro carbon fiber electrode suitable for deep sea based on TRIZ concept includes electrode 1 , current collector 2 , sealing layer 3 and wire 4 . The electrode 1 is a sheet-like structure made of carbon fiber, one side of the electrode 1 is in contact with seawater, and one end of the sheet-shaped electrode has a current collector 2 and is connected to the signal line 4. The current collector 2 is made of conductive metal, and its purpose is to collect The electrical signal of the electric field is transmitted to the detection equipment through the signal line 4, and the outer surface of the current collector 2 is covered with a fluororesin sealing material to prevent the metal from contacting seawater and protect the metal from reacting with seawater.

Further, the carbon fiber electrode layer is not limited to one structure, and may be made by weaving carbon fibers or by other methods. The main purpose of this type of method is to increase the specific surface area of the carbon fiber electrode in contact with seawater by constructing the three-dimensional structure of the carbon fiber.

Furthermore, the current collector 2 material is not limited to conductive metal, it can be other non-metallic substances with good conductivity; it can also be a metal-non-metallic compound, the purpose of which is to transfer the electrical signal collected by the electrode to the signal line, and then reach the relevant detection equipment through transmission. And meet the flexibility requirements.

Further, the sealing layer 3 is not limited to using fluororesin, and other sealing schemes, such as polyurethane, can also be used. Its purpose is to protect the current collector from erosion by seawater and marine organisms.

Further, an adhesive can be used outside the sealing layer 3 to attach the electrode sensor to the surface of other objects for fixing. It can also use the physical buckle structure to connect with the plane of the instrument that needs to be carried.

Further, the marine electric field sensor is characterized in that it can be made into any shape, not limited to the shape shown in the drawings, it only needs to be suitable for testing and electrode placement.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be regarded in all points of view as exemplary and not restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. a kind of miniature carbon fiber electrode applicable to deep sea based on TRIZ concept, is characterized in that, comprises electrode (1), current collector (2), sealing layer (3) and wire (4); Described electrode (1) is made of A sheet-like structure made of carbon fiber; where, One side of the electrode (1) is in contact with seawater for collecting electric field signals in seawater; The other side is covered with a layer of current collector (2) and connected to the wire (4). The current collector (2) can collect the electric field electric signal conducted by the electrode (1) and transmit it to the detection device through the signal line (4); The current collector (2) is covered with a sealing layer (3), which is used to prevent the collector (2) from contacting seawater and prevent the collector (2) from reacting with seawater; The carbon fiber electrode is woven from carbon fiber. By constructing the three-dimensional structure of carbon fiber, the specific surface area of the carbon fiber electrode in contact with seawater is increased to reduce the volume of the micro carbon fiber electrode. 2. The micro-carbon fiber electrode suitable for deep sea based on TRIZ concept according to claim 1, characterized in that, the current collector (2) is made of conductive metal, non-metal or composite material. 3. The micro-carbon fiber electrode suitable for deep sea based on TRIZ concept according to claim 1, characterized in that, the sealing layer (3) is fluororesin or polyurethane. 4. The micro-carbon fiber electrode suitable for deep sea based on the TRIZ concept according to claim 1, characterized in that, the outside of the sealing layer (3) can be connected to the plane of the instrument to be carried by using an adhesive or a physical buckle structure and used in combination.

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