WO2012115342A2

WO2012115342A2 - Emergency piezoelectric flickering tripod having excellent energy-harvesting capability, and method for operating same

Info

Publication number: WO2012115342A2
Application number: PCT/KR2011/009857
Authority: WO
Inventors: 이무용; 강인석; 함유진; 오상규; 이진우; 양성철
Original assignee: (주)진우소프트이노베이션
Priority date: 2011-02-24
Filing date: 2011-12-20
Publication date: 2012-08-30
Also published as: KR101059859B1; WO2012115342A3

Abstract

The present invention relates to an emergency piezoelectric flickering tripod designed to use an LED as a light source and to be capable of harvesting energy by obtaining power to be supplied to the light source from vibratory energy generated by vehicles traveling on a road. The emergency piezoelectric flickering tripod includes: three angles which are foldable by hinge coupling, the three angles being spread out in a triangular shape; a plurality of light-emitting devices attached onto the front surface of each of the three angles; a main support coupled to the lower portion of one of the three angles so as to support the three angles; and a piezoelectric sheet disposed under the main support so as to generate electric energy using the vibratory energy generated by vehicles traveling on a road so as to supply power to the plurality of light-emitting devices.

Description

Piezoelectric emergency flashing tripod designed for energy harvesting and its driving method

The present invention relates to an emergency flashing tripod, and more specifically, by using a light emitting diode (LED) having excellent visibility as a light source, the vibration energy generated by the external impact or the movement of the vehicle driving the road using the power of the light source. The present invention relates to a piezoelectric emergency flashing tripod and a driving method thereof, which are designed to enable energy harvesting without using a battery.

The general emergency flashing tripod is stored in the trunk of the vehicle, and the driver or pedestrian can easily recognize it in the event of an accident such as road maintenance construction or an accident or breakdown of the vehicle. Used for the purpose.

The emergency flashing tripod reflects the light irradiated from the headlight of the vehicle in the direction of incidence by the reflective film attached to the surface, thereby providing the driver with information about the danger area in front of the driver.

However, in the case of the emergency flashing tripod using the reflective film, since the reflective film reflecting the headlights of the vehicle is exposed to the outside as it is used for a long time, the reflective film is easily faded due to the weather, smoke of the vehicle, etc. There is a problem such as being reduced and can not properly identify the reflected light.

As such, when the reflective film of the emergency flashing tripod is discolored or dislodged, the reflective film must be quickly replaced or cleaned to perform its original function. In this case, the replacement or cleaning of the reflective film is time, expense and personnel. There is a problem that the waste of resources caused by the need for a significant amount.

In addition, in the case of the conventional emergency flashing tripod, in the case of bad weather such as fog or snowstorm, the reflective function of the reflector is remarkably degraded, which may act as a factor to increase the incidence of accidents due to the inability to accurately enter the driver's field of view. have.

An object of the present invention is to obtain a battery by using a light emitting diode (LED) having excellent visibility as a light source, by using the vibration energy generated by the external impact or the movement of the vehicle driving on the road, the power supplied to the light source To provide a piezoelectric emergency flashing triangle designed to enable energy harvesting without the need for use.

Another object of the present invention is to provide a method of driving a piezoelectric emergency flashing tripod designed to enable the energy harvesting.

Piezoelectric emergency flashing tripod designed to enable energy harvesting according to an embodiment of the present invention for achieving the above object is foldable by hinge coupling, three angles unfolded in a triangular form; A plurality of light emitting elements attached to front surfaces of the three angles, respectively; A main support coupled to one of the three angles to support the three angles; And a piezoelectric sheet disposed below the main support and generating electrical energy by using vibration energy generated by the movement of a vehicle traveling on a road to supply power to the plurality of light emitting devices. The piezoelectric sheet includes a support plate, a first piezoelectric plate and a second piezoelectric plate respectively attached to both surfaces of the support plate, and a piezoelectric pin that is penetrated in a screw form along the edges of opposite sides of the support plate and fixed in a spring shape. Characterized in that.

The driving method of the piezoelectric emergency flashing triangle designed to enable energy harvesting according to an embodiment of the present invention for achieving the other object comprises the steps of installing an emergency flashing tripod so that the piezoelectric sheet is in contact with the road surface; Generating electrical energy using vibration energy generated by a vehicle passing through the emergency blinking tripod; Storing electrical energy generated by the piezoelectric sheet in a charging device mounted on a rear side of a main support supporting three angles; And driving the plurality of light emitting devices by supplying electrical energy stored in the charging device to a plurality of light emitting devices attached to the front surfaces of the three angles.

The piezoelectric emergency flashing tripod designed to enable energy harvesting according to the present invention uses a light emitting diode (LED) having excellent visibility as a light source, and uses the power supplied to the piezoelectric emergency flashing tripod to drive an external shock or a road. By supplying the power supplied to the light source by itself from the vibration energy obtained by the movement, there is an effect that can be used permanently.

In addition, the piezoelectric emergency flashing tripod designed to enable energy harvesting according to the present invention is formed of a flexible material so that the piezoelectric sheet can be rolled and used in a roll form, thereby minimizing volume and easy to carry in the trunk of a vehicle. There is an advantage.

1 is a perspective view schematically showing a piezoelectric emergency flashing triangle designed to enable energy harvesting according to an embodiment of the present invention.

Figure 2 is a plan view showing the rear of the emergency flashing tripod of FIG.

3 is an enlarged perspective view illustrating a piezoelectric sheet according to an embodiment of the present invention.

Figure 4 is an enlarged perspective view showing a piezoelectric sheet according to another embodiment of the present invention.

5 is a perspective view showing a piezoelectric sheet according to another embodiment of the present invention.

6 is a perspective view showing a light emitting device according to an embodiment of the present invention.

7 is a schematic diagram showing a method of driving a piezoelectric emergency flashing triangle designed to enable energy harvesting according to an embodiment of the present invention.

8 is a flowchart schematically showing a method of driving a piezoelectric emergency flashing triangle designed to enable energy harvesting according to an embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the present embodiments to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims.

Hereinafter, a piezoelectric emergency flashing triangle designed to enable energy harvesting according to a preferred embodiment of the present invention and a driving method thereof will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the piezoelectric emergency flashing tripod 100 designed to enable energy harvesting according to an embodiment of the present invention includes an angle 110, a light emitting device 120, a main support 130, and a piezoelectric sheet 140. ).

Angle 110 is three can be folded by the hinge coupling, it is unfolded in a triangular form. These three angles 110 are usually folded and stored in the trunk of the vehicle, and then assembled in such a way as to be fixed to the main support 130 after unfolding in the form of a triangle when an accident occurs such as road maintenance work or vehicle breakdown or accident occurrence. Can be used.

The light emitting devices 120 may be mounted on the front surfaces of the three angles 110, respectively, and may use a light emitting diode (LED) having excellent visibility as a light source.

The main support 130 is disposed below one of the three angles 110 to support the three angles 110. Although not shown in the drawings, the main support 130 and the angle 110 may be assembled by screwing.

The piezoelectric sheet 140 is disposed below the main support 130 and uses vibration energy generated by an external shock or movement of a vehicle traveling on a road to supply power to the plurality of light emitting devices 120. Produces electrical energy.

In addition, the emergency flashing tripod 100 may further include an auxiliary support 150. The auxiliary support 150 is disposed between the main support 130 and the piezoelectric sheet 140, and serves to maintain the balance of the plate 110, which is combined with the main support 130 in a triangular form. At this time, the auxiliary support 150 is preferably disposed in the form attached to the piezoelectric sheet 140.

In particular, the auxiliary support 150 and the piezoelectric sheet 140 is preferably installed in parallel to the road surface of the road. At this time, it is good to install the auxiliary support 150 and the piezoelectric sheet 140 to be in contact with the road surface of the road, the installation is so that the vibration energy by the vehicle passing through the road surface of the auxiliary support 150 and This is to improve the energy conversion efficiency by being easily transmitted to the piezoelectric sheet 140.

On the other hand, Figure 2 is a plan view showing the rear of the emergency flashing tripod of Figure 1, will be described in more detail in connection with FIG.

1 and 2, the emergency flashing tripod 100 using the piezoelectric sheet according to an embodiment of the present invention may further include a control device 160, a charging device 170 and a control switch 180. have.

The control element 160 is mounted on the rear surface of the main support 130, and rectifies the electrical energy generated by the piezoelectric sheet 140 to generate a constant current. The control device 160 may include a rectifier circuit and various driving circuits for generating a constant current.

The charging device 170 is electrically connected to the control device 160 and stores the rectified electric energy. The charging device 170 is preferably installed in the vicinity of the control device 160. For example, a capacitor may be used.

The control switch 180 controls the on and off of the plurality of light emitting devices 120 by supplying or blocking electric energy stored in the charging device 170 to the plurality of light emitting devices 120.

Figure 3 is an enlarged perspective view showing a piezoelectric sheet according to an embodiment of the present invention, Figure 4 is an enlarged perspective view showing a piezoelectric sheet according to another embodiment of the present invention.

Referring to FIG. 3, the piezoelectric sheet 140 may include a support plate 142, a first piezoelectric plate 144, a second piezoelectric plate 146, and a piezoelectric weight 148.

The support plate 142 has a plate shape, it is preferable to use a spring steel sheet material having a spring-like elasticity, such as copper (Cu), aluminum (Al), silver (Ag), gold It may include one or more selected from (Au) and stainless steel (SUS).

The first piezoelectric plate 144 may be attached to an upper surface of the support plate 142, and the second piezoelectric plate 146 may be attached to a lower surface of the support plate 142. The first and second

piezoelectric plates

144 and 146 may have a smaller area than the support plate 142 and are preferably arranged to overlap each other.

The first and second

piezoelectric plates

144 and 146 may include Pb (Zr, Ti) O ₃ + Pb (Zn, Nb) O ₃ , Pb (Zr, Ti) O ₃ + Pb (Ni, Nb) O ₃ , Pb (Zr, Ti) O ₃ + PVDF polymer, Pb (Zr, Ti) O ₃ + silicon polymer and Pb (Zr, Ti) O ₃ + epoxy polymer may be formed of a first material selected from one of the materials. Alternatively, the first and second

piezoelectric plates

144 and 146 may be formed of a second material selected from (Na, K) NbO ₃ , (Na, K, Li) NbO ₃ , BiFeO _3, and BaTiO ₃ . It may be.

Among them, it is preferable to use a second material as the first and second

piezoelectric plates

144 and 146 rather than a first material containing lead, which is restricted in use due to environmental regulations.

The piezoelectric 148 serves to keep the support plate 142 horizontal and may be made of a metallic material having elasticity.

At this time, the piezoelectric 148 may be penetrated in a screw form along the edges of both sides of the support plate 142 to be fixed in the form of a spring. As described above, when the piezoelectric 148 is formed in the form of a spring, the piezoelectric 148 generates a series of collisions with the support plate 142 due to an external impact or vibration caused by the vibration of the vehicle traveling on the road. The conversion efficiency can be maximized.

Meanwhile, referring to FIG. 4, the piezoelectric sheet 140 may be formed in a shape in which a plurality of piezoelectric sheets 140 are stacked in a vertical direction. In FIG. 4, two piezoelectric sheets 140 are stacked, but this is only an example, and two or more may be stacked.

As such, when the plurality of piezoelectric sheets 140 are stacked in the vertical direction, there is a structural advantage of obtaining a higher capacity electric energy than the above-described embodiment through the plurality of piezoelectric sheets 140.

In this case, the plurality of piezoelectric 148 may be formed in the form of a plurality of rings that are fixed to the support plate 142 penetrating through the edges of both sides facing the support plate 142. As such, when the piezoelectric 148 is formed in the form of a plurality of rings, it is to transmit the vibration generated when the piezoelectric weights 148 having the plurality of the rings collide with each other to the plate-shaped support plate 142. Since it is easy to transmit vibrations to the first and second

piezoelectric plates

144 and 146 attached to the upper and lower surfaces of the support plate 142, respectively, there is a structural advantage to maximize energy conversion efficiency.

5 is a cross-sectional view showing a piezoelectric sheet according to another embodiment of the present invention.

Referring to FIG. 5, the piezoelectric sheet 140 may be formed of a flexible material. In this case, the support plate (not shown) of the piezoelectric sheet 140 may be formed of, for example, polyethylene terephthalate (PET), and the first and second piezoelectric plates (not shown) may be formed of the first plate. And at least one material selected from the second materials.

As such, when the piezoelectric sheet 140 is formed of a flexible material, since the piezoelectric sheet 140 may be rolled and used in a roll shape, its volume may be reduced to about 1/5 or less, and thus it may be easily carried in the trunk of the vehicle.

Referring to FIG. 6, the light emitting devices 120 are mounted on a plurality of circuit boards 122 and one surface of the plurality of circuit boards 122, respectively, which are attached to front surfaces of three plates 110, respectively. It may include a plurality of LED chip 124.

When the LED chip 124 mounted on the circuit board 122 is operated in an on state by operating a control switch (180 of FIG. 2) when an accident occurs, the control device (160 of FIG. 2) The lighting signal is output from the charging device (170 in FIG. 2) to supply the electrical energy stored in response to the lighting signal to the light emitting device 120 to light the light emitting device 120. In this case, it is preferable that the light emitting device 120 is driven in a flickering manner in which lighting and turning off are repeated periodically.

On the other hand, Figure 7 is a schematic diagram showing the driving method of the piezoelectric emergency flashing triangle designed to enable energy harvesting according to an embodiment of the present invention, Figure 8 is an energy harvesting according to an embodiment of the present invention Fig. 1 is a flow chart schematically showing a method of driving a piezoelectric emergency flashing triangle designed to be possible.

7 and 8, the piezoelectric emergency flashing triangular driving method designed to enable energy harvesting according to an embodiment of the present invention is an emergency flashing tripod installation step (S210), electrical energy generation step (S220), electricity The energy storage step S230 and the light emitting device driving step S240 may be included.

In the emergency flashing tripod installation step (S210), the emergency flashing tripod 100 is installed so that the piezoelectric sheet 140 contacts the road surface of the road 102. At this time, the emergency flashing tripod 100 does not find the vehicle 106 stopped by the rear vehicle 104 when the accident occurs due to road maintenance work or an accident or breakdown of the vehicle. In order to prevent a contact accident or a large accident that occurs in advance, it is installed at a rear from a predetermined distance from the stopped vehicle 106.

In the electrical energy generation step (S220), electrical energy is generated by using vibration energy generated by a vehicle passing through the vicinity of the emergency blinking tripod 100. As such, the vibration energy generated by the load or vibration by the vehicle 108 passing through the emergency blinking tripod 100 may be converted into electrical energy by the piezoelectric sheet 140 of the emergency blinking tripod 100. have.

In the electrical energy storage step (S230), the charging device mounted on the rear of the main support (130 of FIG. 1) for supporting the three angles (110 of FIG. 1) of the electrical energy generated through the piezoelectric sheet 140 (FIG. 2). Store at 170). In this case, the charging device may be electrically connected to the control device (160 of FIG. 2) to rectify the electrical energy generated by the piezoelectric sheet 140 to generate a constant current, and a capacitor may be used as the charging device. have.

In the light emitting device driving step (S240), the constant current stored in the charging device is supplied to the plurality of light emitting devices (120 of FIG. 1) attached to the front of the three angles to drive the plurality of light emitting devices.

In this case, when the user operates the control switch 180 of FIG. 2 in the on state, a lighting signal is output from the control device by the control switch, and the charging device receives the stored electrical energy in response to the lighting signal. The light emitting device is turned on by being supplied to the light emitting device. In this case, it is preferable that the light emitting device is driven so that a blinking cycle of turning on and off periodically is repeated.

Here, the light L from the light emitting device is diverted in the direction of the driver of the rear vehicle 104 to inform the driver of the rear vehicle 104 of an unexpected situation caused by road maintenance work or an accident or breakdown of the vehicle. You can do it.

Although not shown in detail in the drawing, before the emergency flashing tripod installation step (S210) by applying an external shock to the emergency flashing tripod 100 forcibly performs an emergency flashing tripod forced vibration generation step (not shown) to generate vibration. You may.

As described so far, the piezoelectric emergency flashing tripod designed to enable energy harvesting according to an embodiment of the present invention has excellent visibility in case of an accident such as road maintenance work or an accident or breakdown of a vehicle. Since a diode is used as a light source, it is easy for the vehicle driver to be aware of an accident situation in front of the vehicle driver. By supplying power by itself, there is an effect that can be used permanently.

In the above description, the embodiment of the present invention has been described, but various changes and modifications can be made at the level of those skilled in the art. Such changes and modifications may belong to the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention will be determined by the claims described below.

Claims

Folding is possible by the hinge coupling, three angles unfold in a triangular form;

A plurality of light emitting elements attached to front surfaces of the three angles, respectively;

A main support coupled to one of the three angles to support the three angles; And

And a piezoelectric sheet disposed below the main support and generating electrical energy using vibration energy generated by movement of a vehicle traveling on a road to supply power to the plurality of light emitting devices.

The piezoelectric sheet includes a support plate, a first piezoelectric plate and a second piezoelectric plate respectively attached to both surfaces of the support plate, and a piezoelectric weight that is penetrated in a screw form along edges of opposite sides of the support plate and fixed in a spring shape. Emergency flashing tripod, characterized in that it comprises.
The method of claim 1,

The emergency flashing tripod

A control element mounted on a rear surface of the main support and rectifying electric energy generated by the piezoelectric sheet;

A charging device electrically connected to the control device to store the rectified electric energy;

And a control switch for supplying or blocking the electrical energy stored in the charging device to the plurality of light emitting devices.
The method of claim 1,

The emergency flashing tripod

It further comprises an auxiliary support coupled to the main support between the piezoelectric sheet and the main support to maintain the balance of the emergency flashing triangle,

The auxiliary support and the piezoelectric sheet is an emergency flashing tripod, characterized in that installed parallel to the road surface.
The method of claim 1,

The support plate is

An emergency flashing tripod, characterized in that formed of at least one material selected from copper (Cu), aluminum (Al), silver (Ag), gold (Au), PET (polyethylene terephthalate) and SUS (stainless steel).
The method of claim 1,

The first and second piezoelectric plates are

(Na, K) NbO 3, (Na, K, Li) NbO 3, BiFeO 3 , and BaTiO 3 Emergency flashing tripod using a piezoelectric sheet, characterized in that formed in one of the materials selected.
The method of claim 1,

The first and second piezoelectric plates are

Emergency flashing tripod using a piezoelectric sheet having a smaller area than the support plate, characterized in that disposed so as to overlap each other.
The method of claim 1,

The light emitting device

A circuit board attached to the front of the angle,

An emergency flashing tripod comprising a plurality of LED chips mounted on one surface of the circuit board.
In the driving method using the emergency flashing tripod according to any one of claims 1 to 7,

Installing an emergency flashing tripod so that the piezoelectric sheet contacts the road surface;

Generating electrical energy using vibration energy generated by a vehicle passing through the emergency blinking tripod;

Storing electrical energy generated by the piezoelectric sheet in a charging device mounted on a rear side of a main support supporting three angles; And

And driving the plurality of light emitting devices by supplying electrical energy stored in the charging device to a plurality of light emitting devices attached to the front surfaces of the three angles.
The method of claim 8,

Before the emergency flashing tripod installation step,

And an emergency flashing tripod forcibly generating a vibration by forcibly generating an external shock by applying an external shock to the emergency flashing tripod.