CN111691321B - A wind barrier using origami-structured triboelectric nanogenerators - Google Patents

Abstract

The invention relates to a windproof barrier using a friction nanogenerator with an origami structure. A friction nanometer power generation device and a wind speed sensor are installed on the outer side of the main body of the windproof barrier. A warning device is also installed on the wind speed sensor, a processor is connected to the wind speed sensor, the output ends of the triboelectric nano-power generation device are respectively connected to the wind speed sensor, and are connected to the warning device through a controllable switch, so as to provide electrical energy to the wind speed sensor and the warning device respectively, and the processor is connected to the wind speed sensor and the warning device. The controllable switches are connected to control the turn-on and turn-off of the controllable switches. Compared with the prior art, the present invention installs an origami-structured triboelectric nano-generating device and a warning device on the wind barrier, which has the advantages of buffering the crosswind pressure on the wind barrier and converting the wind energy received by the wind barrier into electrical energy. , and can effectively warn vehicles on the bridge road with excessive wind speed to avoid safety accidents caused by crosswinds.

Description

A wind barrier using origami-structured triboelectric nanogenerators

technical field

The invention relates to the technical field of bridge engineering, in particular to a windproof barrier using an origami structure friction nanogenerator.

Background technique

Bridges are an important part of modern transportation systems. Bridge roads in areas with frequent strong winds, such as highways in Xinjiang, Inner Mongolia and coastal areas, due to geographical location and other reasons, the wind speed of bridge roads is much higher than that of other roads. Wind speed, the safety of vehicles driving on the side of the road is prominent. In order to reduce the impact of crosswinds on the driving safety of the bridge deck, avoid vehicle sideslip or roll accidents, improve the driving environment on the bridge deck, and increase the effective passage time of the bridge, it is usually necessary to set up wind barriers on both sides of the bridge or on the central divider. By adding a wind barrier, the wind speed of the bridge deck can be reduced, the driving comfort of the bridge deck can be increased, and it is a main means to improve the use function of the bridge.

Most of the existing wind barriers adopt the strip-type wind barrier structure of "steel column + barrier bar", in which the steel column acts as a support, and the wind barrier acts as a wind shield. Controls the wind blocking effect of the wind barrier. As shown in FIG. 1 , the main body 7 of the wind barrier is mainly composed of a wind barrier column 1 , a wind barrier strip 2 , a wind barrier cable 3 , a wind barrier splint and a damping rubber sleeve 4 , and the wind barrier column 1 is a column for fixing the wind barrier strip 2 . The wind barrier strip 2 is fixed between the wind barrier columns 1 and is a horizontal strip force member used to reduce the crosswind wind load; the wind barrier cable 3 is used to ensure the overall stability of the bridge wind barrier. The material is stainless steel wire, etc., which needs to be prestressed; the wind barrier splint is used to clamp the wind barrier strip 2, and is fixed on the wind barrier column 1 with high-strength bolts; the damping rubber sleeve 4 is used to reduce the wind barrier strip 2. shock.

In practical applications, when there is a strong wind, the wind barrier will be subject to a large crosswind pressure, which makes the entire main body of the wind barrier prone to vibration and damage, and even drives the bridge to vibrate as a whole. In addition, the existing wind barrier cannot provide a warning to vehicles driving on the bridge deck, and cannot effectively remind driving vehicles to pay attention to safe driving when the wind speed is high.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a wind barrier using an origami structure friction nanogenerator in order to overcome the above-mentioned defects in the prior art. Buffer the crosswind pressure on the windbreak, and convert the wind power to use the electric energy for the warning light panel to effectively warn the driving vehicle.

The object of the present invention can be achieved by the following technical solutions: a wind barrier using an origami structure friction nanogenerator, comprising a wind barrier main body, and a tribo nanometer power generation device and a wind speed sensor are installed on the outside of the wind barrier main body, and the friction The nanometer power generation device is used to convert wind energy into electrical energy. The triboelectric nanometer power generation device is provided with an origami structure for buffering the side wind pressure and increasing the friction area. The main body of the wind barrier is also equipped with a warning device. A processor is connected, and the output ends of the triboelectric nano-power generation device are respectively connected to the wind speed sensor and to the warning device through a controllable switch, so as to provide electrical energy to the wind speed sensor and the warning device respectively, and the processor is connected to the controllable switch. , to control the turn-on and turn-off of the controllable switch.

Further, the triboelectric nanogenerator is specifically a vertical contact separation type triboelectric nanogenerator, and the triboelectric nanogenerator further includes a friction layer, a TENG (Triboelectric Nanogenerators, triboelectric nanogenerator) circuit and electrodes arranged symmetrically with each other, so The origami structure is located between electrodes, the friction layer covers the outer surface of the origami structure, the input end of the TENG circuit is connected to the electrodes, and the output end of the TENG circuit is respectively connected to the wind speed sensor and is connected through a controllable switch to the warning device.

Further, the output end of the TENG circuit is sequentially connected with a full-wave rectifier circuit and a filter capacitor, and the filter capacitors are respectively connected to the wind speed sensor and connected to the warning device through a controllable switch.

Further, the negative electrode of the friction layer is made of perfluoroalkane material, and the positive electrode of the friction layer is made of elastic latex material.

Further, the electrode is made of metal aluminum material.

Further, the origami structure adopts the form of honeycomb-like cell walls to produce buffering and anti-compression effects.

Further, the triboelectric nano-power generation device is installed on the outside of the main body of the windproof barrier in a simply supported form.

Further, the warning device is installed on the inner side of the wind barrier.

Further, the warning device includes a plurality of light emitting diodes.

Further, after the light-emitting diode is powered on, it emits yellow light that flashes at a preset frequency.

The specific working principle of the present invention is as follows: when there is no crosswind effect, the electrodes of the triboelectric nano-power generation device are in a separated state, and the tribo-nano-power generation device does not output electrical energy at this time;

When there is a crosswind, the pressure of the crosswind acts on the friction nanodevice located outside the wind barrier, the origami structure is compressed, the origami structure is in contact with the friction layer, and through frictional electrification and electrostatic induction, a potential difference is generated between the two electrodes, accompanied by The irregular change of the crosswind pressure forms a periodic contact separation process between the electrodes. The TENG circuit converts the wind energy into electrical energy and outputs alternating current. The alternating current is converted into direct current through the full-wave rectifier circuit, and then the output is smooth through the filter capacitor. The direct current is output to the wind speed sensor, and the wind speed sensor detects the wind speed of the current crosswind. If the processor judges whether the wind speed of the current crosswind exceeds the preset wind speed threshold, if it is judged to be yes, it controls the controllable switch to turn on. After the warning system receives electricity from the friction nano-device, it emits a flashing yellow light to remind the driving vehicle on the bridge road that the current wind speed is too large and it is necessary to pay attention to safe driving; if it is judged to be no, it will control the controllable switch to turn off and warn the system to lose power , the vehicle on the bridge road will not be reminded.

Compared with the prior art, the present invention has the following advantages:

1. The present invention combines a triboelectric nano-power generation device with an origami structure and a warning device, and uses the tribo-nano-power generation device to convert the crosswind received by the wind barrier into electrical energy, and outputs the electrical energy to the warning device, which can not only reduce the buffering effect through the origami structure. The crosswind pressure on the bridge wind barrier can also have a warning effect on the vehicles driving on the bridge road.

2. In the present invention, the friction layer is covered on the outer surface of the origami structure to effectively increase the contact surface area of the friction layer, thereby significantly amplifying the contact friction charging and electrostatic induction effects, forming an area that can generate induced charges, enhancing energy conversion efficiency, and ensuring windproof barriers The crosswinds received can be efficiently converted into electrical energy.

3. The present invention collects the current crosswind wind speed in real time through the wind speed sensor, and uses the processor to judge the dangerous wind speed, so as to control whether the warning device is powered on, and in turn ensure that the warning device can timely and reliably remind vehicles driving on the bridge road to pay attention to safe driving.

Description of drawings

Fig. 1 is the schematic diagram of the wind barrier body;

Fig. 2 is the structural representation of the present invention;

3 is a schematic structural diagram of a triboelectric nano-power generation device in the present invention;

Fig. 4 is the connection schematic diagram of TENG circuit in the present invention;

Description of symbols in the figure: 1, wind barrier column, 2, wind barrier strip, 3, wind barrier cable 4, wind barrier splint and damping rubber sleeve, 5, bridge deck, 6, bridge guardrail, 7, wind barrier main body, 8 , Triboelectric nano power generation device, 9, connecting wire, 10, wind speed sensor, 101, processor, 11, controllable switch, 12, warning device, 13, origami structure, 14, electrode, 15, friction layer, 16, TENG circuit .

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example

A wind barrier using an origami structure friction nanogenerator, comprising a wind barrier main body 7 (the specific structure is shown in FIG. 1 , the structure is the prior art), the inner side of the wind barrier main body 7 faces the bridge road surface, and the wind barrier main body 7 The outside faces the outer areas on both sides of the bridge. As shown in FIG. 2 , the friction nano-power generation device 8 is installed on the outside of the wind barrier main body 7 , the warning device 12 is installed on the inner side of the wind barrier main body 7 , and the wind speed sensor is also installed on the wind barrier main body 7 . 10. A processor 101 and a controllable switch 11, wherein the triboelectric nano-generating device 8 is connected to the wind speed sensor 10 and the controllable switch 11 respectively through the wire 9, the wind speed sensor 10 is connected to the processor 101, and the processor 101 is connected to the controllable switch 11 connected, the controllable switch 11 is connected to the warning device 12, that is, the triboelectric nano-generating device 8 provides electrical energy for the wind speed sensor 10, and the processor 101 controls the turn-on and turn-off of the controllable switch 11 according to the wind speed value detected by the wind speed sensor 10 , thereby controlling whether the warning device 12 gets electricity from the triboelectric nano-generating device, the wind speed sensing device 10 detects the real-time wind speed, and when the measured wind speed is in the normal range, the controllable switch 11 is turned off, and when the wind speed exceeds the preset limit value , the controllable switch 11 is turned on, so that the warning device 12 installed on the inner side of the wind barrier is powered on and starts to work.

Specifically, the structure of the triboelectric nano-power generation device 8 is shown in FIG. 3 . The entire tribo-nano-power generation device 8 adopts a vertical contact separation working mode, and uses the coupling effect between triboelectricity and electrostatic induction to generate electric energy, which is mainly composed of an origami structure. 13. The electrodes 14, the friction layer 15, and the TENG circuit 16 are symmetrically arranged with each other. The origami structure 13 adopts the form of a honeycomb-like cell wall, which can provide a good buffer capacity and compressive capacity, thereby buffering the crosswind pressure on the wind barrier. , increase the friction area, the friction layer 15 uses perfluoroalkane (PFA) as the negative electrode material, elastic latex as the positive electrode material, metal aluminum (Al) as the electrode, the friction layer 15 is covered on the origami structure 13, the origami structure 13 can effectively The contact surface area of the friction layer 15 is significantly increased to significantly amplify the contact triboelectric charging and electrostatically induced capacitance changes, forming an area where induced charges can be generated. When there is no wind force, the electrodes 14 of the triboelectric nano-power generation device are in a separated state; when there is wind force, the origami structure 13 is folded and compressed under the action of the crosswind pressure, and the origami structure 13 is in contact with the friction layer 15. According to the principle of electricity generation and electrostatic induction, a potential difference will be generated between the upper and lower electrodes 14, and the periodic contact separation process of the electrodes 14 is formed through the irregular crosswind pressure, and the conversion of wind energy into electric energy is realized through the TENG circuit 16. The wind speed sensor 10 and the warning device 12 are powered. As shown in FIG. 4 , the output end of the TENG circuit 16 first passes through a full-wave rectifier circuit to convert the alternating current into direct current, and then undergoes capacitive filtering to obtain a relatively stable and smooth output current.

The invention combines origami technology and triboelectric nano-power generation technology to apply to the wind barrier. Since the nano-power generation technology first emerged in 2012, the tribo-nano-power generation based on Maxwell's displacement current has attracted widespread attention. Triboelectric nanopower generation utilizes the coupling between triboelectricity and electrostatic induction to convert mechanical energy into electrical energy. It has the advantages of low cost and rich material selection, and has great potential in microelectronics low-power systems and solutions for stretchable energy generation. It has high open-circuit voltage and instantaneous energy conversion efficiency much higher than other mechanical energy harvesting technologies such as piezoelectricity and magnetoelectricity. It is a promising road energy harvesting technology; origami technology is an emerging technology that has emerged in recent years. Mathematical derivation and proof can design and manufacture origami configurations with different rigidity, specific surface area and stretchability, which have many applications in space compression utilization and information storage. The comprehensive use of triboelectric nanogenerators and origami technology can enhance the energy conversion efficiency and output power of the current traditional triboelectric nanogenerators, achieve better energy recovery and power supply, and have great application prospects in power generation and self-power supply. The triboelectric nanogenerator using origami technology is simple in structure and light in weight, so it will not affect the streamlined aerodynamic shape of the main beam when installed on the outside of the bridge wind barrier.

Therefore, when the wind barrier for bridges proposed by the present invention is applied in practice, the origami structure can be used to buffer to reduce the stress of the bridge wind barrier, and at the same time, the wind energy that was originally wasted on the wind barrier can be converted into electrical energy by combining with triboelectric nano-power generation. The generated electrical energy can be directly used for warning light panels to remind passing vehicles to pay attention to safety. The invention has the advantages of buffering the crosswind pressure on the wind barrier and converting the wind energy on the wind barrier into electrical energy. The design of the invention has the function of early warning whether the wind speed on the bridge reaches a critical dangerous value. When the measured wind speed is at a dangerous value, the light-emitting diodes arranged on the inner side of the wind barrier are controlled to emit light for warning, so as to warn the vehicles traveling on the bridge in advance, reducing the Accidents caused by crosswinds will play an important role in future intelligent and safe bridge projects.

Claims (7)

1. The utility model provides an use windbreak of paper folding structure friction nanometer generator, includes windbreak main part (7), windbreak main part (7) mainly comprises windbreak stand column (1), windbreak strip (2), windbreak cable (3), windbreak splint and damping rubber sleeve (4), its characterized in that, friction nanometer power generation facility (8) and wind speed sensor (10) are installed to the outside of windbreak main part (7), friction nanometer power generation facility (8) are used for converting wind energy into electric energy, the inside paper folding structure (13) that are used for buffering crosswind pressure and increase frictional area that is equipped with of friction nanometer power generation facility (8), paper folding structure (13) adopt type honeycomb cell wall form to produce buffering and resistance to compression effect, still install warning device (12) on windbreak main part (7), wind speed sensor (10) are connected with treater (101), the output end of the friction nanometer power generation device (8) is respectively connected to the wind speed sensor (10) and the warning device (12) through a controllable switch (11) so as to respectively provide electric energy for the wind speed sensor (10) and the warning device (12), and the processor (101) is connected with the controllable switch (11) so as to control the on and off of the controllable switch (11);

the friction nanometer power generation device (8) is specifically a vertical contact separation type friction nanometer power generation device (8), the friction nanometer power generation device (8) also comprises a friction layer (15), a TENG circuit (16) and electrodes (14) which are symmetrically arranged, the paper folding structure (13) is positioned between the electrodes (14), the friction layer (15) covers the outer surface of the paper folding structure (13), the input end of the TENG circuit (16) is connected with the electrode (14), the output end of the TENG circuit (16) is respectively connected to the wind speed sensor (10) and the warning device (12) through the controllable switch (11), the output end of the TENG circuit (16) is sequentially connected with a full-wave rectifying circuit and a filter capacitor, the filter capacitors are respectively connected to the wind speed sensor (10) and the warning device (12) through the controllable switch (11);

the specific working principle of the windproof barrier is as follows: when no crosswind acts, the electrodes (14) of the friction nano power generation device (8) are in a separation state, and the friction nano power generation device (8) does not output electric energy;

when crosswind acts, crosswind pressure acts on a friction nanometer power generation device (8) positioned on the outer side of the wind barrier strip (2), the paper folding structure (13) is compressed, the paper folding structure (13) is in contact friction with the friction layer (15), through friction electrification and electrostatic induction, a potential difference is generated between the two electrodes (14), a periodic contact separation process between the electrodes (14) is formed along with the irregular change of the crosswind pressure, the TENG circuit (16) converts wind energy into electric energy according to the electric energy, outputs alternating current, the alternating current is converted into direct current through the full-wave rectification circuit, the stable direct current is output through the filter capacitor, the direct current is output to the wind speed sensor (10), the wind speed sensor (10) detects the current crosswind speed, and if the processor (101) judges whether the current crosswind speed value exceeds a preset wind speed threshold value or not, if the wind speed is judged to be over-high, the controllable switch (11) is controlled to be conducted, and the warning device (12) emits flickering yellow light after the friction nano power generation device (8) is powered on, so that the driving vehicle on the bridge road surface is reminded of driving safely due to the fact that the current wind speed is over-high; if not, the controllable switch (11) is controlled to be turned off, and the warning device (12) loses power and does not remind the running vehicles on the bridge pavement.

2. The windbreak of claim 1, wherein the negative electrode of the friction layer (15) is made of perfluoroalkane, and the positive electrode of the friction layer (15) is made of elastic latex.

3. The windbreak of a triboelectric nanogenerator using origami structure according to claim 1, characterized in that the electrodes (14) are made of metallic aluminium.

4. The windbreak using origami to rub nanogenerator according to claim 1, characterized in that the triboelectric nanogenerator device (8) is mounted in a simple form on the outside of the windbreak body (7).

5. The windbreak using origami to rub a nanogenerator according to claim 1, wherein the warning device (12) is mounted inside the windbreak strip (2).

6. The windbreak using origami to rub a nanogenerator according to claim 1, wherein the warning device (12) comprises a plurality of light emitting diodes.

7. The windbreak using origami to rub a nanogenerator according to claim 6, wherein the light emitting diode emits yellow light that flickers at a predetermined frequency when energized.

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