CN105952592B - The software turbo dynamo collected based on human motion energy - Google Patents

Abstract

The invention discloses a soft impeller generator based on human motion energy collection, which includes a cylinder, an energy conversion structure and an energy collection circuit arranged in the cylinder; wherein, the energy conversion structure is an axisymmetric structure, including a crankshaft, a first The DE film and the second DE film, the crankshaft includes an integrated Z-shaped rod and the first crankshaft connecting rod shaft and the second crankshaft connecting rod shaft vertically arranged at both ends of the Z-shaped rod, and one side of the DE film is connected to the crankshaft connecting rod shaft , the other side is connected to the inner wall of the cylinder, and two DE films are arranged diagonally. The invention utilizes the rotation of the crankshaft to drive the elastic dielectric elastomer film to generate periodic expansion and contraction deformation to collect mechanical energy and convert it into electrical energy through a special circuit. It can be applied to occasions where the driving motion is circular motion, such as fitness equipment or automatic vehicles; the electric energy converted by the collection circuit can be online or stored to supply power to intelligent electronic products (such as mobile phones, smart watches) carried by the human body.

Description

Soft impeller generator based on human motion energy harvesting

Technical field:

The invention belongs to the field of intelligent materials, and in particular relates to a soft impeller generator based on human motion energy collection, which can effectively recycle and convert mechanical energy generated by human body and rotating equipment into electrical energy.

Background technique:

In the field of energy harvesting, an eye-catching research content is to use the special physical, chemical or biological effects of some functional materials to achieve energy acquisition and conversion. People are no strangers to piezoelectric materials, shape memory alloys, electrostrictive materials, etc. for energy harvesting. However, piezoelectric materials have high requirements on the surrounding environment, weak power generation energy (usually microwatts to milliwatts), and high prices. They are often used in MEMS systems and microsensors and other fields; the temperature deformation characteristics of shape memory alloys make It has high requirements on energy harvesting conditions; electrostrictive materials have small strain and low energy conversion efficiency.

In recent years, some low-modulus soft active polymer materials have attracted great interest from relevant researchers due to their unique functional properties.

Dielectric Elastomers (DE) are a new type of electro-active functional materials (Electro-active Polymers, EAPs), which have good flexibility, large deformation, high energy density, easy direct coupling with mechanical energy sources, impact resistance and fatigue resistance and other advantages, and can efficiently convert mechanical energy in nature into electrical energy, so it has great potential in the field of energy harvesting for the human body and nature.

The working principle and cycle process of DE-based energy harvesting are:

The basic function of the "sandwich" type DE film coated with flexible electrodes on the upper and lower surfaces is equivalent to a variable capacitor. The charge of the DE film under the state is also called polarization, which corresponds to the input electric energy); ③The film elastically recovers, and at the same time, the opposite-sex charges separate, the same-sex charges approach, Maxwell’s electrostatic force does negative work, and the voltage increases. In this process, the mechanical energy in the form of film strain is converted into electrical energy, which realizes the increase of the energy storage of the DE capacitor; ④ the electrical energy is collected (removed), and the film returns to the initial state before working and stretching to start the next cycle.

Invention content:

The purpose of the present invention is to solve the above problems. It provides a soft impeller generator based on human body movement energy collection. It is conceived from the demand for renewable energy from daily fitness and resource and environmental pressure. Mechanical energy is converted into electrical energy for recycling. The invention can not only convert the mechanical energy generated by the human body and the rotating mechanical movement into electric energy, but also conveniently use the energy collection circuit to collect the electric energy to supply to the charging of portable intelligent electronic devices such as mobile phones, and the structure is simple, pollution-free, and the cost is relatively low Low.

In order to achieve the above object, the present invention adopts following technical scheme to realize:

A soft impeller generator based on human motion energy collection, including a cylinder, and an energy conversion structure and an energy harvesting circuit arranged in the cylinder; wherein,

The transducer structure is an axisymmetric structure, including a crankshaft, a first DE film and a second DE film. The crankshaft includes an integrally formed Z-shaped rod and the first crankshaft connecting rod shaft and the second crankshaft connecting rod vertically arranged at both ends of the Z-shaped rod. Rod shaft, one side of the first DE film is connected to the first crankshaft connecting rod shaft, and the other side is connected to the inner wall of the cylinder, one side of the second DE film is connected to the second crankshaft connecting rod shaft, and the other side is connected to the inner wall of the cylinder , and the first DE film and the second DE film are arranged diagonally;

Both ends of the energy harvesting circuit are respectively connected to the lead-out electrodes on the front and rear sides of the first DE film, and at the same time connected to the lead-out electrodes on the front and back sides of the second DE film, that is, the two DE films coated with electrodes are connected in parallel and connected to the energy harvesting circuit. string together.

The further improvement of the present invention is that it also includes a third DE film and a fourth DE film, one side of the third DE film is connected with the first crankshaft connecting rod shaft, the other side is connected with the inner wall of the cylinder, one side of the fourth DE film is connected with the The second crankshaft connecting rod shaft is connected, and the other side is connected with the inner wall of the cylinder, and the third DE film and the fourth DE film are arranged diagonally.

The further improvement of the present invention is that several cylinder pairs are arranged on the first crankshaft connecting rod shaft and the second crankshaft connecting rod shaft, and one side of the first DE film and one side of the third DE film are connected to the first crankshaft through the cylinder pairs. The rod shafts are connected, and one side of the second DE film and one side of the fourth DE film are connected with the second crankshaft connecting rod shaft through a cylinder pair.

The further improvement of the present invention is that several cylinder pairs are arranged on the first crankshaft connecting rod shaft and the second crankshaft connecting rod shaft, and one side of the first DE film and one side of the second DE film pass through the fixing piece and the cylinder pair and the first A crankshaft connecting rod shaft is connected, and the other side of the first DE film and the other side of the second DE film are connected with the inner wall of the cylinder through the fixing piece;

One side of the third DE film and one side of the fourth DE film are all connected to the second crankshaft connecting rod shaft through the fixing piece and the cylinder pair, and the other side of the third DE film and the other side of the fourth DE film are connected to the circle through the fixing piece. connected to the inner wall of the barrel.

A further improvement of the present invention lies in that several transducer structures connected in series in sequence are arranged in the cylinder.

The further improvement of the present invention is that the size and shape of the first DE film and the second DE film are the same, and both are rectangular DE films; the size and shape of the third DE film and the fourth DE film are the same, and both are rectangular DE films.

The further improvement of the present invention is that the energy harvesting circuit includes a filter capacitor C1, a rectifier bridge, an energy storage capacitor C2 and a load R; wherein, the electrodes on the front and rear sides of any DE film are connected to the energy storage capacitor C2 through the filter capacitor C1 and the rectifier bridge in turn. , and the load R is connected in parallel to both ends of the energy storage capacitor C2.

Compared with prior art, the beneficial effect of the present invention is:

1. Using the crankshaft energy conversion structure, the soft impeller generator based on the dielectric elastomer material design can collect and utilize the rotating motion in life, and the material cost is low and pollution-free. Using energy harvesting circuits, mechanical energy can be converted into electrical energy and collected and utilized while people are moving.

2. Two DE films in tension and contraction are connected to the connecting rod shaft of a crankshaft at the same time, so that the electric energy generated by the cycle process of the DE energy conversion structure reaches the load through the energy collection circuit and the current is more stable when it is used, which is convenient for follow-up Supply power to intelligent electronic products (such as mobile phones, smart watches, etc.).

3. Several transducer structures are connected in series and the angle distribution of the crankshaft and connecting rod shafts is different (viewed from the axisymmetric line of the transducer structure), so that the current flowing through the load during the cycle of the DE transducer structure is further stabilized, which is conducive to the direct collection and utilization of electric energy .

Description of drawings:

Fig. 1 is a schematic structural diagram of a soft impeller generator based on human motion energy harvesting.

Among them: 1 is the cylinder; 2 is the fixed piece; 301 is the first DE film; 302 is the second DE film; 4 is the cylinder pair; 5 is the crankshaft; 501 is the first crankshaft connecting shaft; 502 is the second crankshaft connecting shaft ; 601 is the third DE film; 602 is the fourth DE film.

Figure 2 is a schematic diagram of a soft impeller generator based on energy harvesting from human motion, in which Figures 2a to 2h show the structure rotating 0°, 45°, 90°, 135°, 180°, 225°, and 270° from the initial state, respectively and the deformation state diagrams of the two DE films at 315°.

Figure 3 is a circuit diagram of energy harvesting, where C1 is a filter capacitor, C2 is an energy storage capacitor, four diodes D1, D2, D3, and D4 form a rectifier bridge, and R is a load.

Detailed ways:

The present invention is described in further detail below in conjunction with accompanying drawing:

Referring to Fig. 1 , the soft impeller generator based on human motion energy collection provided by the present invention includes a cylinder 1, and a transducing structure and an energy harvesting circuit arranged in the cylinder 1; wherein, the transducing structure is an axisymmetric structure, Including a crankshaft 5, a first DE film 301 and a second DE film 302, the crankshaft 5 includes an integrally formed Z-shaped rod and a first crankshaft connecting rod shaft 501 and a second crankshaft connecting rod shaft 502 vertically arranged at both ends of the Z-shaped rod , one side of the first DE film 301 is connected with the first crankshaft connecting rod shaft 501, and the other side is connected with the inner wall of the cylinder 1, one side of the second DE film 302 is connected with the second crankshaft connecting rod shaft 502, and the other side is connected with the cylinder The inner walls of 1 are connected, and the first DE film 301 and the second DE film 302 are arranged diagonally; the two ends of the energy harvesting circuit are respectively connected to the lead-out electrodes on the front and rear sides of the first DE film 301, and at the same time connected to the second DE film 302 The electrodes on the front and rear sides of the battery are connected, that is, the two DE films coated with electrodes are connected in parallel and connected in series with the energy harvesting circuit. Specifically, as shown in Figure 3, the energy harvesting circuit includes a filter capacitor C1, a rectifier bridge, an energy storage capacitor C2, and a load R; wherein, the lead-out electrodes on the front and rear sides of any DE film are sequentially connected to the energy source through the filter capacitor C1 and the rectifier bridge. The two ends of the storage capacitor C2, and the load R is connected in parallel with the two ends of the energy storage capacitor C2.

In addition, the present invention also includes a third DE film 601 and a fourth DE film 602. One side of the third DE film 601 is connected to the first crankshaft connecting rod shaft 501, and the other side is connected to the inner wall of the cylinder 1. The fourth DE film 602 One side is connected with the second crankshaft connecting rod shaft 502, and the other side is connected with the inner wall of the cylinder 1, and the third DE film 601 and the fourth DE film 602 are arranged diagonally.

Further, several cylinder pairs 4 are arranged on the first crankshaft connecting rod shaft 501 and the second crankshaft connecting rod shaft 502, and one side of the first DE film 301 and one side of the second DE film 302 pass through the fixing member 2 and the cylinder pair 4 Connected to the first crankshaft connecting rod shaft 501, the other side of the first DE film 301 and the other side of the second DE film 302 are connected to the inner wall of the cylinder 1 through the fixing part 2; one side of the third DE film 601 and the fourth One side of the DE film 602 is connected to the second crankshaft connecting rod shaft 502 through the fixing part 2 and the cylinder pair 4, and the other side of the third DE film 601 and the other side of the fourth DE film 602 are connected to the cylinder 1 through the fixing part 2. connected to the inner wall.

As shown in Figure 2, this kind of "soft impeller" micro-energy harvester based on crankshaft drive is equipped with a DE film in the direction of the first crankshaft connecting rod shaft 501 of the crankshaft at an angle of 180 degrees. In the initial state (one working cycle ends, the next working cycle begins immediately), the first DE film 301 is in the maximum tension state, the third DE film 601 is in the minimum tension state, and when the sports equipment drives the crankshaft main shaft to continue to rotate, it is in the maximum tension state. The first DE film 301 in the stretched state shrinks, and the third DE film 601 in the minimum stretched state is stretched accordingly, so that it can be ensured that the DE film is always in a stretched (shrinked) state when the energy harvester is working. This structural design can ensure that the subsequent energy harvesting circuit has continuous charge flowing into the storage capacitor or directly supplied to the load. Figure 2 is a schematic diagram of the deformation of the DE film on a connecting rod shaft when the crankshaft rotates (viewed from the z direction), and a~h are the rotations of the structure from the initial state of 0°, 45°, 90°, 135°, 180°, and 225° respectively. °, 270° and 315° for the deformation states of two DE films. Viewed from the z direction, the two crankshaft connecting rod shafts connected to the crankshaft with an interval angle of 180° in Fig. The n connecting rod shafts are distributed at an angle of 360/n degrees. This design makes the current flowing through the energy harvesting circuit more stable when the structure is moving. Therefore, the number of connecting rod shafts can be selected according to actual needs, which is flexible and widely used.

In this structural design, the n films will not be hinged together when they rotate, and in order to collect more energy, each film position can be a stacked structure of multi-layer DE films. Larger energy collection can be achieved by separating the negative poles to avoid short circuit, which is a development direction for energy harvesters with higher power.

Claims (7)

1. The soft impeller generator based on human body movement energy collection comprises a cylinder (1), and an energy conversion structure and an energy collection circuit which are arranged in the cylinder (1); the energy conversion structure is characterized by being of an axisymmetric structure and comprising a crankshaft (5), a first DE film (301) and a second DE film (302), wherein the crankshaft (5) comprises an integrally formed Z-shaped rod, and a first crankshaft connecting rod shaft (501) and a second crankshaft connecting rod shaft (502) which are vertically arranged at two ends of the Z-shaped rod, one side of the first DE film (301) is connected with the first crankshaft connecting rod shaft (501), the other side of the first DE film is connected with the inner wall of a cylinder (1), one side of the second DE film (302) is connected with the second crankshaft connecting rod shaft (502), the other side of the second DE film is connected with the inner wall of the cylinder (1), and the first DE film (301) and the second DE film (302) are arranged in a diagonal manner;

two ends of the energy collecting circuit are respectively connected with the front and back extraction electrodes of the first DE film (301) and are simultaneously connected with the front and back extraction electrodes of the second DE film (302), namely the two DE films coated with the electrodes are connected in parallel and are connected with the energy collecting circuit in series.

2. The soft body impeller generator based on human body movement energy collection as claimed in claim 1, further comprising a third DE film (601) and a fourth DE film (602), wherein one side of the third DE film (601) is connected with the first crankshaft connecting rod shaft (501), the other side is connected with the inner wall of the cylinder (1), one side of the fourth DE film (602) is connected with the second crankshaft connecting rod shaft (502), the other side is connected with the inner wall of the cylinder (1), and the third DE film (601) and the fourth DE film (602) are arranged diagonally.

3. The soft impeller generator based on human motion energy collection of claim 1 or 2, wherein the first crankshaft connecting rod shaft (501) and the second crankshaft connecting rod shaft (502) are respectively provided with a plurality of cylindrical pairs (4), one side of the first DE film (301) and one side of the third DE film (601) are respectively connected with the first crankshaft connecting rod shaft (501) through the cylindrical pairs (4), and one side of the second DE film (302) and one side of the fourth DE film (602) are respectively connected with the second crankshaft connecting rod shaft (502) through the cylindrical pairs (4).

4. The soft impeller generator based on human motion energy collection of claim 2, wherein the first crankshaft connecting rod shaft (501) and the second crankshaft connecting rod shaft (502) are respectively provided with a plurality of cylindrical pairs (4), one side of the first DE film (301) and one side of the second DE film (302) are respectively connected with the first crankshaft connecting rod shaft (501) through the fixing piece (2) and the cylindrical pairs (4), and the other side of the first DE film (301) and the other side of the second DE film (302) are respectively connected with the inner wall of the cylinder (1) through the fixing piece (2);

one side of the third DE film (601) and one side of the fourth DE film (602) are connected with the second crankshaft connecting rod shaft (502) through fixing pieces (2) and a cylindrical pair (4), and the other side of the third DE film (601) and the other side of the fourth DE film (602) are connected with the inner wall of the cylinder (1) through the fixing pieces (2).

5. The soft body impeller generator based on human body movement energy collection according to claim 1 or 2, characterized in that a plurality of sequentially connected energy conversion structures are arranged in the cylinder (1).

6. The soft body impeller generator based on human body movement energy collection of claim 2, wherein the first DE membrane (301) and the second DE membrane (302) are the same in size and shape and are both rectangular DE membranes; the third DE film (601) and the fourth DE film (602) are identical in size and shape and are rectangular DE films.

7. The soft body impeller generator based on human body movement energy collection of claim 1, wherein the energy collection circuit comprises a filter capacitor C1, a rectifier bridge, an energy storage capacitor C2 and a load R; the front and rear extraction electrodes of any DE film are sequentially connected with two ends of an energy storage capacitor C2 through a filter capacitor C1 and a rectifier bridge, and a load R is connected in parallel with two ends of the energy storage capacitor C2.