KR20200130954A - Flexible multi piezoelectric module for monitoring sensor for structural diagnosis and energy harvester having excellent output voltage characteristics through electrode array and module connection structure optimization - Google Patents

Abstract

Disclosed is a flexible multi-piezoelectric module for an energy harvester and a monitoring sensor for structure diagnosis having an excellent output voltage property through the optimization of an electrode arrangement and module connection structure, capable of deriving a structure indicating an excellent output voltage property by deriving the optimization of an arrangement method and a connection method between at least two piezoelectric fiber modules designed with an electrode width of 0.08-0.12 mm and an electrode gap of 0.18-0.22 mm. According to the present invention, the flexible multi-piezoelectric module for an energy harvester and a monitoring sensor for structure diagnosis includes at least two piezoelectric fiber modules electrically connected. Each of the piezoelectric fiber modules includes: a piezoelectric fiber layer; a first electrode structure attached to one side of the piezoelectric fiber layer, and having a first electrode, and a first polymer film supporting the first electrode; and a second electrode structure attached to the other side of the piezoelectric fiber layer, and having a second electrode, and a second polymer film supporting the second electrode.

Description

FLEXIBLE MULTI PIEZOELECTRIC MODULE FOR MONITORING SENSOR FOR STRUCTURAL DIAGNOSIS AND ENERGY HARVESTER HAVING EXCELLENT OUTPUT VISTOLTAGE ELECTROCTERORICS THARACTER MODULE CONNECTION STRUCTURE OPTIMIZATION}

The present invention relates to a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for an energy harvester, and more particularly, a connection method and arrangement method between at least two piezoelectric fiber modules designed with an electrode width of 0.08 to 0.12 mm and an electrode spacing of 0.18 to 0.22 mm The present invention relates to a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for energy harvesters having excellent output voltage characteristics by optimizing an electrode array and a module connection structure that derives an optimization of the structure showing excellent output voltage characteristics.

Piezoelectric ceramics play an important role in the electronics industry and mechatronics, and are used for special piezoelectric materials including ultrasonic transducers, non-destructive ultrasonic transducers, fish finders, light sets, optical modulator color filters, and actuators for flue gas control.

Pb(Zr,Ti)O ₃ (hereinafter referred to as'PZT') is a piezoelectric material with excellent piezoelectric properties, low price, and well known manufacturing process technology, and is used in many application fields. In the solid solution of PbTiO ₃ and PbZrO ₃ , a PZT solid solution having a strong piezoelectricity at the tetragonal-trigonal phase boundary and a Curie temperature of 390°C was found.

Accordingly, the use of piezoelectric ceramics as various electronic devices such as actuators, frequency output sensors, piezoelectric transducers, and resonators using piezoelectric effects using such ceramics. Research has been extensively conducted.

These PZTs have excellent piezoelectric and dielectric properties, so they are widely used in various fields, but have disadvantages in that they occupy a certain space in the device due to the weak strength of ceramics, difficulty in curved shape, and bulk form.

On the other hand, piezoelectric fiber modules have excellent piezoelectric performance and are much less structurally damaged when bent or bent than thin films, and when piezoelectric fibers are received on a stretchable substrate, a stretchable device is manufactured. There is an advantage that it is also possible.

In recent years, research to check whether the energy harvester through a single module consisting of one piezoelectric fiber module and a structural diagnosis monitoring sensor can be used has been actively conducted.

However, in most energy harvesters and structural diagnostic monitoring sensors, two or more piezoelectric fiber modules are connected in the form of a dual module.

In addition, the shape of the piezoelectric fiber module arrangement varies depending on the surrounding environment in which the piezoelectric fiber module is used. However, we have reported on an energy harvester that has optimized the arrangement of the piezoelectric fiber module and a flexible multi-piezoelectric module for structural diagnosis monitoring sensors. Nothing happened.

As a related prior document, there is Korean Laid-Open Patent Publication No. 10-2007-0021326 (published on February 22, 2007), and the document describes a sensor and system for monitoring the integrity of a structure.

An object of the present invention is to derive an optimization of a connection method and an arrangement method between at least two piezoelectric fiber modules designed with an electrode width of 0.08 to 0.12 mm and an electrode spacing of 0.18 to 0.22 mm to derive a structure showing excellent output voltage characteristics, and It is to provide a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for energy harvesters with excellent output voltage characteristics through optimization of the module connection structure.

In order to achieve the above object, the structure diagnosis monitoring sensor and the energy harvester flexible multi-piezoelectric module having excellent output voltage characteristics by optimizing the electrode arrangement and the module connection structure according to the embodiment of the present invention are piezoelectric fibers in which at least two or more are electrically connected. A module; wherein each of the piezoelectric fiber modules includes a piezoelectric fiber layer, a first electrode structure attached to one surface of the piezoelectric fiber layer, and having a first electrode, a first polymer film supporting the first electrode, and the And a second electrode structure attached to the other surface of the piezoelectric fiber layer and having a second electrode and a second polymer film supporting the second electrode.

The structure diagnosis monitoring sensor and the flexible multi-piezoelectric module for energy harvesters according to the present invention are excellent by deriving the optimization of the connection method and arrangement method between at least two piezoelectric fiber modules designed with an electrode width of 0.08 to 0.12 mm and an electrode spacing of 0.18 to 0.22 mm. A structure representing the output voltage characteristics was found.

As a result, in the present invention, we found out how to connect and arrange the optimal flexible piezoelectric fiber modules that can be attached to structures (silicone hoses) that are actually used around our lives and used for structural diagnosis monitoring sensors.

In addition, in the present invention, in order to confirm the possibility of use as an energy harvester according to body movement, a flexible piezoelectric fiber module was attached to the shoe to derive the optimum voltage output characteristics according to the connection method and arrangement method.

In addition, when using the flexible multi-piezoelectric module of the present invention as an energy harvester, at least two or more piezoelectric fiber modules are arranged side by side in the x-axis direction, but it is higher output to connect the piezoelectric fiber modules in series rather than parallel connection. It was confirmed that the characteristics were exhibited.

In addition, when using the flexible multi-piezoelectric module of the present invention as a monitoring sensor for structural diagnosis, at least two piezoelectric fiber modules are stacked and arranged in the z-axis direction, but the output characteristic is that the piezoelectric fiber modules are connected to each other by serial connection rather than parallel connection. Was found to be more beneficial in improving

1 is a combined perspective view showing a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for an energy harvester according to an embodiment of the present invention.
Figure 2 is an exploded perspective view showing an enlarged single piezoelectric fiber module of Figure 1;
3 is an enlarged plan view of the first electrode of FIG. 2.
4 is a combined perspective view showing a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for an energy harvester according to a modified example of the present invention.
5 is a graph showing results of evaluation of output voltage characteristics according to a connection method when modules are arranged in the x-axis direction.
6 is a graph showing the result of evaluating output voltage characteristics due to a bending motion according to a connection method when modules are arranged in the x-axis direction.
7 is a graph showing a displacement value measurement result according to a connection method when modules are arranged in the x-axis direction.
8 is a graph showing the results of evaluating output voltage characteristics according to a connection method when modules are arranged in the z-axis direction.
9 is a graph showing the result of evaluating output voltage characteristics due to a bending motion according to a connection method when the modules are arranged in the z-axis direction.
10 is a graph showing a displacement value measurement result according to a connection method when modules are arranged in the z-axis direction.
11 is a graph showing the result of evaluating the output voltage characteristics of the energy harvester by body movement according to the module arrangement method.
12 is a graph showing the results of evaluating the output voltage characteristics of the energy harvester according to the speed of body movement.
13 is a graph showing the result of evaluating the output voltage characteristics of the structural diagnosis monitoring sensor according to the module arrangement method.
14 is a graph showing the result of evaluating the output voltage characteristics of the structural diagnosis monitoring sensor according to the hole size of the hose.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only this embodiment is to complete the disclosure of the present invention, and the general knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Hereinafter, with reference to the accompanying drawings, a detailed description of a structure diagnosis monitoring sensor having excellent output voltage characteristics and a flexible multi-piezoelectric module for an energy harvester will be described in detail by optimizing an electrode arrangement and a module connection structure according to a preferred embodiment of the present invention. .

1 is a combined perspective view showing a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for an energy harvester according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing an enlarged single piezoelectric fiber module of FIG. 1, and FIG. It is a plan view showing an enlarged first electrode of 2.

1 to 3, a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module 400 for an energy harvester according to an embodiment of the present invention include a piezoelectric fiber module 100, an external connection wire 200, and a bridge connection wire ( 300).

At least two or more of the piezoelectric fiber module 100 are electrically connected. At this time, it is preferable that at least two or more piezoelectric fiber modules 100 are connected in series with each other, because serial connection can obtain higher output characteristics than parallel connection.

In addition, it is more preferable that at least two or more of the piezoelectric fiber modules 100 are arranged side by side in the x-axis direction, and this is the widest case when the flexible multi-piezoelectric module 400 is used as an energy harvester in series in the x-axis direction. This is because the output characteristic can be measured the highest because a person can step on the area.

Each of these piezoelectric fiber modules 100 includes a piezoelectric fiber layer 110, a first electrode structure 140, and a second electrode structure 170.

The piezoelectric fiber layer 110 may include polyvinyleden floride (PVDF): 80 to 20% by weight and lead-free piezoelectric ceramic powder: 20 to 80% by weight. At this time, when the amount of PVDF (polyvinyleden floride) added is less than 20% by weight of the total weight of the piezoelectric fiber layer 110, the concentration is low during electrospinning and is accumulated in the form of droplets, thereby forming a bead-shaped fibrous shape. On the contrary, when the amount of PVDF (polyvinyleden floride) exceeds 80% by weight of the total weight of the piezoelectric fiber layer 110, there is a problem that stability is deteriorated when the piezoelectric fiber layer 110 is formed due to excessive shrinkage.

In particular, when the amount of the lead-free piezoelectric ceramic powder added is less than 20% by weight of the total weight of the piezoelectric fiber layer 110, it is advantageous to secure flexibility, but it may be difficult to secure piezoelectric performance. Conversely, when the amount of the lead-free piezoelectric ceramic powder added exceeds 80% by weight of the total weight of the piezoelectric fiber layer 110, it is advantageous in terms of piezoelectric performance, but the brittleness increases depending on the nature of the fiber shape, resulting in difficulty in handling. It causes a problem of rapid decline in flexibility.

It is preferable that the piezoelectric fiber layer 110 has a thickness of 100 to 5,000 μm. When the thickness of the piezoelectric fiber layer 110 is less than 100 μm, it may be difficult to properly exhibit piezoelectric performance because the thickness is too thin. On the contrary, when the thickness of the piezoelectric fiber layer 110 exceeds 5,000 μm, an actuator, a frequency output sensor, a monitoring sensor for structural diagnosis, and an energy harvester When applied to an actual electronic device such as a piezoelectric transducer, it can act as a factor that decreases practicality by increasing the product thickness.

The first electrode structure 140 is attached to one surface of the piezoelectric fiber layer 110 and includes a first electrode 120 and a first polymer film 130 supporting the first electrode 120. In addition, the second electrode structure 170 is attached to the other surface of the piezoelectric fiber layer 110 and includes a second electrode 150 and a second polymer film 160 supporting the second electrode 150.

At this time, each of the first and second electrodes 120 and 150 may use known electrode materials such as copper (Cu), silver (Ag), gold (Au), and aluminum (Al) without limitation. These first and second electrodes 120 and 150 are disposed inside the first and second polymer films 130 and 160, respectively, or disposed on the surfaces of the first and second polymer films 130 and 160 Can be.

The first electrode 120 connects the body electrode parts 122 disposed along both upper and lower edges and a plurality of body electrode parts 122 disposed vertically by extending inward from the body electrode part 122 to each other. It has a connection electrode portion 124 having an interlock-type electrode arrangement structure.

At this time, the connection electrode portion 124 is preferably designed to be spaced apart with a width (w) of 0.08 ~ 0.12mm and a distance (d) of 0.18 ~ 0.22mm, which is the width (w) of the connection electrode portion 124 And when the interval d is out of the above range, the output voltage value tends to decrease rapidly.

Each of the first and second polymer films 130 and 160 is made of polyimide (PI), polyethylene napthalate (PEN), polyethylene terephthalate (PET), polycarbonate (PC), etc. Any one or more selected materials may be used.

In particular, in the present invention, it is preferable that each of the first and second electrodes 120 and 150 has an interdigitated electrode (IDE electrode) arrangement structure. In the case of the first and second electrodes 120 and 150, when using a front electrode structure (TBE) in which the central portion is designed as an integral planar structure unlike the interlocked electrode array structure, the output voltage value is high, Since it is composed of a front electrode structure, it is easily short-circuited or the electrode is easily damaged, so durability is weak. Therefore, it is more preferable to use the first and second electrodes 120 and 150 having an interlocked electrode array structure rather than a front electrode structure.

The external connection wiring 200 may be electrically connected to the first electrode 120 of the piezoelectric fiber module 100, respectively. The external connection wiring 200 may be installed to transmit a voltage generated from the piezoelectric fiber module 100 to an external device (not shown).

The bridge connection wiring 300 serves to connect the piezoelectric fiber modules 100 to each other in series by electrically connecting the piezoelectric fiber modules 100 to each other. To this end, the bridge connection wiring 300 may be disposed in a form in which two adjacent piezoelectric fiber modules 100 arranged in the x-axis direction are electrically directly connected to each other.

Meanwhile, FIG. 3 is a combined perspective view showing a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for an energy harvester according to a modified example of the present invention.

Referring to FIG. 3, a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module 400 for an energy harvester according to a modified example of the present invention include a piezoelectric fiber module 100 and an external connection wiring 200.

At this time, in a modified embodiment of the present invention, unlike the embodiment, at least two or more piezoelectric fiber modules 100 are stacked and arranged in the z-axis direction, and the piezoelectric fiber modules 100 are connected in series with each other.

Here, the two piezoelectric fiber modules 100 may be stacked and arranged so that the second electrode structures 170 contact each other. At this time, each of the piezoelectric fiber modules 100 is illustrated as having a second electrode structure 170, respectively, but this is illustrative and one second electrode structure 170 is disposed per two piezoelectric fiber modules 100, The second electrode structure 170 may be stacked in a form shared by the two piezoelectric fiber modules 100, respectively. That is, the piezoelectric fiber module 100 is integrally formed with the second electrode structures 170 that are in contact with each other vertically, and thus can be directly electrically connected.

As in the modified example of the present invention, it was confirmed through an experiment that the case where the piezoelectric fiber modules 100 arranged in the z-axis direction were connected in series showed higher displacement values than the case where they were connected in parallel.

That is, when a certain voltage was applied to the piezoelectric fiber modules 100 arranged in the z-axis direction, the displacement value was better for the dual-type piezoelectric fiber modules 100 connected in series, and the piezoelectric fiber modules 100 arranged in the z-axis direction. When two or more) are connected, it was found that the serial connection can obtain higher output characteristics than the parallel connection.

The structure diagnosis monitoring sensor and the energy harvester flexible multi-piezoelectric module according to the embodiment of the present invention described above include a connection method and an arrangement method between at least two piezoelectric fiber modules designed with an electrode width of 0.08 to 0.12 mm and an electrode spacing of 0.18 to 0.22 mm. By deriving optimization, we found a structure that exhibits excellent output voltage characteristics.

As a result, in the present invention, we found out how to connect and arrange the optimal flexible piezoelectric fiber modules that can be attached to structures (silicone hoses) that are actually used around our lives and used for structural diagnosis monitoring sensors.

In addition, in the present invention, in order to confirm the possibility of use as an energy harvester according to body movement, a flexible piezoelectric fiber module was attached to the shoe to derive the optimum voltage output characteristics according to the connection method and arrangement method.

In addition, when using the flexible multi-piezoelectric module of the present invention as an energy harvester, at least two or more piezoelectric fiber modules are arranged side by side in the x-axis direction, but it is higher output to connect the piezoelectric fiber modules in series rather than parallel connection. Found that it exerts a characteristic.

In addition, when using the flexible multi-piezoelectric module of the present invention as a monitoring sensor for structural diagnosis, at least two piezoelectric fiber modules are stacked and arranged in the z-axis direction, but the output characteristic is that the piezoelectric fiber modules are connected to each other by serial connection rather than parallel connection. Was found to be more beneficial in improving

Example

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and cannot be construed as limiting the present invention in any sense.

Contents not described herein can be sufficiently technically inferred by those skilled in the art, and thus description thereof will be omitted.

In the following experimental examples, a piezoelectric fiber module (hereinafter, abbreviated as a module) is used as the first and second electrodes each having a width of 0.1 mm and including a connection electrode portion designed to be spaced apart at an interval of 0.2 mm. I did.

5 is a graph showing the results of evaluating output voltage characteristics according to a connection method when modules are arranged in the x-axis direction. At this time, the two modules were connected in series connection and parallel connection method in the x-axis direction, respectively.

As shown in FIG. 5, when the modules are arranged in the x-axis direction, in order to examine the output characteristics according to the series connection and parallel connection, respectively, the output voltage according to the vibration frequency from 0 Hz to 3,000 Hz was measured.

As a result of the measurement, it can be seen that the serial connection shows higher output characteristics than the parallel connection. As a result, it was confirmed that the serial connection was superior in output characteristics according to the vibration frequency.

6 is a graph showing the results of evaluating output voltage characteristics due to a bending motion according to a connection method when modules are arranged in the x-axis direction.

As shown in FIG. 6, when the modules are arranged in the x-axis direction, the output voltage due to the bending motion according to the series connection and parallel connection was measured.

As a result of the measurement, it can be seen that the series connection exhibits higher output characteristics even in the bending motion. This is because the series connection in the dual module connected by the x-axis shows a better output voltage than the parallel connection.

7 is a graph showing a displacement value measurement result according to a connection method when modules are arranged in the x-axis direction.

As shown in FIG. 7, the modules were arranged along the x-axis, and a displacement value according to the connection method was measured when a constant voltage was applied to the module. At this time, the displacement value was measured with a laser scanning vibrometer, and an applied voltage of 8V was applied as the voltage, and the displacement value was measured.

As a result of the measurement, it was confirmed that the case where the modules arranged in the x-axis direction were connected in series showed higher displacement values than the case where the modules were connected in parallel.

In other words, when a certain voltage is applied to the modules arranged in the x-axis direction, the displacement value is better in the series-connected dual module, and when two or more modules arranged in the x-axis direction are connected, the serial connection is higher than the parallel connection. It was confirmed that properties could be obtained.

8 is a graph showing the results of evaluating output voltage characteristics according to a connection method when modules are arranged in the z-axis direction.

As shown in FIG. 8, when the modules are arranged in the z-axis direction, in order to examine the output characteristics according to the series connection and parallel connection, respectively, the output voltage according to the vibration frequency from 0 Hz to 3,000 Hz was measured.

As a result of the measurement, it can be seen that the serial connection shows higher output characteristics than the parallel connection. As a result, it was confirmed that the serial connection was superior in output characteristics according to the vibration frequency.

9 is a graph showing a result of evaluating output voltage characteristics due to a bending motion according to a connection method when the modules are arranged in the z-axis direction.

As shown in FIG. 9, when the modules are arranged in the z-axis direction, output voltages due to bending motions according to series connection and parallel connection were measured, respectively.

As a result of the measurement, it can be seen that the series connection exhibits higher output characteristics even in the bending motion. This is because the series connection in the dual module connected by the z-axis shows better output voltage than the parallel connection.

10 is a graph showing a displacement value measurement result according to a connection method when modules are arranged in the z-axis direction.

As shown in FIG. 10, the modules were arranged in the z-axis, and the displacement value according to the connection method was measured when a constant voltage was applied to the module.

At this time, the displacement value was measured with a laser scanning vibrometer, and an applied voltage of 8V was applied as the voltage, and the displacement value was measured.

As a result of the measurement, it was confirmed that the case where the modules arranged in the z-axis direction were connected in series showed higher displacement values than the case where the modules were connected in parallel.

In other words, when a constant voltage is applied to the modules arranged in the z-axis direction, the displacement value is better in the series-connected dual module, and when two or more modules arranged in the z-axis direction are connected, the series connection is higher than the parallel connection. It was confirmed that properties could be obtained.

11 is a graph showing a result of evaluating an output voltage characteristic of an energy harvester by body movement according to a module arrangement method.

As shown in Fig. 11, a single module, a dual module connected in series in the z-axis direction, and a dual module connected in series in the x-axis direction, respectively, are mounted under the shoes of a man weighing 83kg, respectively, when moving at a speed of 7km/h. The result of measuring the output voltage of is shown.

As a result of the measurement, when the module was connected in series in the x-axis direction, the output voltage was measured the highest as 20.5V.

At this time, the reason why the output voltage of the x-axis array was measured the highest is that when the dual modules are arranged in the x-axis direction, a person can step on the widest area, so the output characteristic is considered to be the highest.

12 is a graph showing the results of evaluating the output voltage characteristics of the energy harvester according to the speed of body movement.

As shown in FIG. 12, the energy harvester output characteristics were confirmed through the output voltage according to the body movement speed of the dual modules connected in series in the x-axis direction.

As a result of the measurement, as the body movement speed increased, a higher output voltage was obtained. This is believed to be because the pressure applied to the shoe increases as the speed increases.

In addition, when running at a speed of 13Km/h, the module measures a constant output voltage at the beginning, but it can be seen that the output voltage gradually decreases. This means that as the speed increases, eventually more and more force is applied to the module.If the speed exceeds 13Km/h, the force applied to the module becomes greater than the force that the module can withstand. It is understood that this will not be possible.

13 is a graph showing the result of evaluating the output voltage characteristics of the structural diagnosis monitoring sensor according to the module arrangement method.

As shown in Fig. 13, when a module is attached to a silicone hose to evaluate the characteristics of the sensor of the monitoring module for structural diagnosis, a hole is drilled in a size of 5ð and water is poured, the output according to the distance between the hole and the hole of the module The voltage was measured. At this time, as a module, a dual module connected in series in the z-axis direction was used.

As a result of the measurement, when no water is poured, a very small output voltage is measured as 0.01mV, whereas when the water is poured, an output voltage of 8.31mV appears when the distance to the hole is 5cm, and as the distance increases, the output voltage increases. It was confirmed that the size was reduced. This is the principle that when a hole in the hose is made, the hose vibrates when water flows, and the output voltage of the module can be measured.

14 is a graph showing the results of evaluating the output voltage characteristics of the structural diagnosis monitoring sensor according to the hole size of the hose.

As shown in Figure 14, the output voltage of the module was measured according to the hole size of the hose. At this time, as a module, a dual module connected in series in the z-axis direction was used.

When the size of the hole gradually increased from 4ð to 8ð, the output voltage from the module was measured, and the distance to the hole was fixed at 5cm.

As a result of the measurement, it can be seen that the output voltage increases when increasing from 4ð to 5ð and then decreases again above 6ð. When the hole size of the hose is small, the pressure applied to the entire hose increases and the vibration of the hose is large, which indicates a high output voltage, but if the hole of the hose becomes too large, the pressure applied to the hose decreases. This is because it decreases.

Although the above has been described based on the embodiments of the present invention, various changes or modifications can be made at the level of a person of ordinary skill in the art to which the present invention pertains. Such changes and modifications can be said to belong to the present invention as long as it does not depart from the scope of the technical idea provided by the present invention. Accordingly, the scope of the present invention should be determined by the claims set forth below.

400: flexible multi-piezoelectric module 300: bridge connection wiring
200: external connection wiring 100: piezoelectric fiber module
110: piezoelectric fiber layer 120: first electrode
130: first polymer film 140: first electrode structure
150: second electrode 160: second polymer film
170: second electrode structure

Claims (11)

At least two or more piezoelectric fiber modules are electrically connected; includes,
Each of the piezoelectric fiber modules includes a piezoelectric fiber layer, a first electrode structure attached to one surface of the piezoelectric fiber layer, and having a first electrode and a first polymer film supporting the first electrode,
A structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for energy harvesters, comprising a second electrode structure attached to the other surface of the piezoelectric fiber layer and having a second electrode and a second polymer film supporting the second electrode .
The method of claim 1,
The piezoelectric fiber modules are connected in series with each other, wherein a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for an energy harvester.
The method of claim 1,
The piezoelectric fiber layer
A monitoring sensor for structural diagnosis and a flexible multi-piezoelectric module for energy harvesters having a thickness of 100 to 5,000 μm.
The method of claim 1,
Each of the first and second electrodes
Body electrode portions disposed along both upper and lower edges; And
A connection electrode portion extending inward from the body electrode portion to interconnect the body electrode portions disposed vertically and having an interlock-type electrode arrangement structure;
A flexible piezoelectric fiber module having excellent output characteristics, characterized in that it has.
The method of claim 4,
The connection electrode part
A monitoring sensor for structural diagnosis and a flexible multi-piezoelectric module for an energy harvester, having a width of 0.08 to 0.12mm.
The method of claim 4,
The connection electrode part
A monitoring sensor for structural diagnosis and a flexible multi-piezoelectric module for energy harvesters, which are spaced apart at intervals of 0.18 to 0.22mm.
The method of claim 1,
The piezoelectric fiber module
A monitoring sensor for structural diagnosis and a flexible multi-piezoelectric module for an energy harvester, characterized in that at least two or more are arranged side by side in the x-axis direction.
The method of claim 1,
The piezoelectric fiber module
A monitoring sensor for structural diagnosis and a flexible multi-piezoelectric module for energy harvesters, characterized in that they are connected in series through a bridge connection wire.
At least two or more piezoelectric fiber modules are electrically connected; includes,
Each of the piezoelectric fiber modules includes a piezoelectric fiber layer, a first electrode structure attached to one surface of the piezoelectric fiber layer, and having a first electrode and a first polymer film supporting the first electrode,
A second electrode structure attached to the other surface of the piezoelectric fiber layer and having a second electrode and a second polymer film supporting the second electrode,
The piezoelectric fiber module is a structure diagnosis monitoring sensor and an energy harvester flexible multi-piezoelectric module, characterized in that at least two are stacked and arranged in a z-axis direction.
The method of claim 9,
The piezoelectric fiber modules are connected in series with each other, wherein a structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for an energy harvester.
The method of claim 9,
The piezoelectric fiber module
A structure diagnosis monitoring sensor and a flexible multi-piezoelectric module for energy harvesters, characterized in that the second electrode structures contacting up and down are integrally formed and directly connected.

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