KR100988077B1 - Piezoelectric road energy harvester - Google Patents

Piezoelectric road energy harvester Download PDF

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Publication number
KR100988077B1
KR100988077B1 KR1020100061253A KR20100061253A KR100988077B1 KR 100988077 B1 KR100988077 B1 KR 100988077B1 KR 1020100061253 A KR1020100061253 A KR 1020100061253A KR 20100061253 A KR20100061253 A KR 20100061253A KR 100988077 B1 KR100988077 B1 KR 100988077B1
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South Korea
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plate
weight
piezoelectric
housing
road
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KR1020100061253A
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Korean (ko)
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최동호
박완순
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한양대학교 산학협력단
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

PURPOSE: A piezoelectric energy harvester for the road is provided to prevent interference on the vibration of a piezo-plate, thereby improving the efficiency of energy generation. CONSTITUTION: A piezoelectric energy harvester for the road comprises a piezo-plate(10), a mass sinker(11), a repulsion plate(35), an upper plate(22), a contact sinker(31), and a return plate(32). An end of the piezo-plate is fixed to an inner wall of a housing(21) buried in the road. The repulsion plate is attached to the inner bottom of the housing under the mass sinker. The upper plate is connected to the top of the housing to close the housing. The contact sinker passes through the upper plate above the mass sinker. The return plate is attached to the outer periphery of the contact sinker. The piezo-plate is vibrated as the mass sinker is hit by the contact sinker collides against the housing and the repulsion plate.

Description

도로용 압전식 에너지 하비스터{PIEZOELECTRIC ROAD ENERGY HARVESTER}Piezoelectric energy harvester for roads {PIEZOELECTRIC ROAD ENERGY HARVESTER}

본 발명은 도로에 매설되는 압전식 에너지 하비스터(energy harvester)에 관한 것으로, 상부 통과 차량의 차륜과 접촉하는 접촉추(31)를 통하여 차륜하중(車輪荷重)이 압전판(10)에 전달되어 압전판(10)의 진동을 유발하되, 접촉추(31)의 불요(不要) 진동을 억제하여 압전판(10) 진동에 대한 간섭현상을 방지하고, 과도한 충격으로 인한 압전판(10)의 파손을 방지한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric energy harvester embedded in a road. The wheel load is transmitted to the piezoelectric plate 10 through a contact weight 31 contacting the wheel of an upper pass vehicle. Induces vibration of the piezoelectric plate 10, but suppresses unnecessary vibration of the contact weight 31 to prevent interference of the piezoelectric plate 10, and damage of the piezoelectric plate 10 due to excessive impact. Will be prevented.

에너지 하비스터란 자연상태에서 변형 또는 소멸되는 에너지를 획득하여 가용의 에너지 형태로 변환하는 장치를 일컫는 것으로, 버려지는 에너지를 수집한다는 의미에서 에너지 스캐빈저(energy scavenger)라고도 불리운다.An energy harvester is a device that acquires energy that is transformed or dissipated in nature and converts it into an available form of energy. It is also called an energy scavenger in the sense of collecting waste energy.

에너지 하비스터는 그 용어 자체의 사용이 비교적 근래이 이루어졌을 뿐, 인류가 고대로부터 사용하던 에너지획득 방식과 일맥상통하는 것으로, 수차(水車)나 풍차(風車)도 광의의 에너지 하비스터라 할 수 있으나, 수력발전 또는 풍력발전 등 대규모 설비를 필요로 하는 산업용 발전시설과의 구분을 위하여 비교적 간소한 구성으로 단위 장치당 소량의 전력을 생산하는 수단을 협의의 에너지 하비스터로 구분하고 있다.Energy harvesters are relatively recent in terms of their use, and are in line with the methods of obtaining energy used by mankind from ancient times. Aberrations and windmills are also widely used energy harvesters. In order to distinguish it from industrial power generation facilities that require large-scale facilities such as hydroelectric power or wind power generation, the energy harvester is negotiated as a means of producing a small amount of power per unit in a relatively simple configuration.

이러한 에너지 하비스터용 발전(發電)수단으로서 압전체(壓電體)를 들 수 있는데, 압전체는 물리적 변형을 전력으로 변환하는 것으로, 외력에 의한 변형이 발생되면 분극(分極)이 유도되고 이 분극에 의하여 전기장이 형성되는 압전효과(piezoelectric effect)가 발현되는 것이며, 대표적인 예로서 납-지르코늄-티타늄 복합산화물(PZT, lead zirconate titanate)을 들 수 있다.A piezoelectric body is a power generating means for energy harvesters. A piezoelectric body converts physical deformation into electric power. When deformation due to an external force occurs, polarization is induced, and A piezoelectric effect in which an electric field is formed is expressed, and a lead zirconium-titanium composite oxide (PZT) is a representative example.

압전판(10)은 판상(板狀)으로 성형된 압전체로서, 압전판(10)에 인장 및 압축력이 작용함에 따라 서로 반대방향의 전류가 발생되는데, 저면지지, 양단지지 및 캔틸레버(cantilever) 등 구조역학적 양태에 따른 외력작용시 변형 및 출력전류 파형이 도 1에 도시되어 있다.The piezoelectric plate 10 is a piezoelectric body formed in a plate shape, and currents in opposite directions are generated as the tensile and compressive forces act on the piezoelectric plate 10, and bottom support, both ends support, and cantilever are performed. The deformation and output current waveforms during external force action according to the structural dynamics are shown in FIG. 1.

도 1에 도시된 압전판(10)의 구조 중 하단에 도시된 캔틸레버는 변형 및 진동 효율 측면에서 가장 유리한 형태라 할 수 있으며, 도시된 구조는 캔틸레버형 압전판(10)의 자유단에 외력을 가하여 변형시킨 후 외력을 해제하여 진동을 유발한 것으로, 하방으로 변형시 캔틸레버의 상부면 및 하부면에 각각 인장응력 및 압축응력이 발생되고, 상방으로 변형시 반대로 캔틸레버의 상부면 및 하부면에 각각 압축응력 및 인장응력이 발생되는 바, 캔틸레버의 진동이 소멸되는 시점까지 변형(δ)과 동위상(同位相) 또는 대칭위상의 교류전류가 발생된다.
The cantilever shown at the bottom of the structure of the piezoelectric plate 10 shown in Figure 1 may be said to be the most advantageous form in terms of deformation and vibration efficiency, the structure shown is an external force to the free end of the cantilevered piezoelectric plate 10 After deforming by applying external force, vibration is induced, and when it is deformed downward, tensile and compressive stresses are generated on the upper and lower surfaces of the cantilever, respectively, and on the upper and lower surfaces of the cantilever on the contrary, As compressive stress and tensile stress are generated, alternating current and alternating current are generated in the same phase or symmetrical phase until the vibration of the cantilever disappears.

압전판(10)은 발전을 위한 장치 구성이 간단할 뿐 아니라 공해를 배출하지 않으므로 에너지 하비스터의 도입 취지에 가장 부합되는 발전수단이라 할 수 있으며, 압전판(10)의 변형을 유발하는 외력원으로는 도로 또는 교량에 작용하는 차륜하중(車輪荷重), 풍력, 구조물의 공진 등을 들 수 있다.The piezoelectric plate 10 is not only a simple device configuration for power generation, but also does not emit pollution, and thus may be considered a power generation means most suitable for the purpose of introducing an energy harvester, and an external force source that causes deformation of the piezoelectric plate 10. Examples include wheel loads acting on roads or bridges, wind power, resonance of structures, and the like.

이중 교량을 포함하는 도로에 작용하는 차륜하중을 외력원으로 사용하는 압전식 에너지 하비스터는 통상 도 2에서와 같이, 도로에 매설되는 방식으로 설치되어 운용되는데, 도면상 좌측은 차륜하중이 압전판(10)에 직접 전달되는 방식이고 우측은 노면에 노출된 변형판(19) 하부에 공동(空洞)을 형성하고 변형판(19) 저면에 압전판(10)을 설치하여 차륜하중에 따른 변형판(19)의 변형 및 복원과정에서 압전판(10)에 진동이 유발되도록 한 것이다.Piezoelectric energy harvesters using a wheel load acting on a road including a double bridge as an external force source is usually installed and operated in a way that is embedded in the road, as shown in Figure 2, the left side of the drawing is a piezoelectric plate The plate is directly transmitted to (10) and the right side forms a cavity under the deformation plate 19 exposed on the road surface, and the piezoelectric plate 10 is installed on the bottom of the deformation plate 19 so that the deformation plate 19 according to the wheel load is provided. In the deformation and restoration of the piezoelectric plate 10 is to cause vibration.

이러한 종래의 도로 매설형 압전식 에너지 하비스터에는 다음과 같은 문제점이 있다.The conventional road-embedded piezoelectric energy harvester has the following problems.

우선 도 2 좌측의 단순 평판식 압전판(10)은 도시된 바와 같이, 차륜하중이 압전판(10)에 직접 작용하는 방식으로서 압전판(10) 저면 전체가 면지지되는 바, 휨변형에 의한 충분한 변형을 기대할 수 없으며, 1차 변형후 진동에 따른 2차변형을 거의 기대할 수 없으므로 전력 생산량이 미미한 문제점이 있다.First, as shown in FIG. 2, the simple flat plate type piezoelectric plate 10 on the left side is a method in which the wheel load acts directly on the piezoelectric plate 10, and the entire bottom surface of the piezoelectric plate 10 is supported by the bar. Sufficient deformation cannot be expected, and second generation deformation due to vibration after the first deformation can hardly be expected.

이에, 도 2 우측에서와 같이, 변형판(19)의 변형에 따라 압전판(10)의 진동이 유발되는 방식의 도로용 에너지 하비스터가 개발되었으나, 차량 통과에 따른 충격 및 차륜하중을 지지하기 위하여 변형판(19)에 일정수준 이상의 강성을 부여하여야 하므로 압전판(10)의 충분한 진동을 유발할 수 있는 변형판(19)의 변형량을 확보하기 어려운 문제점이 있다.
Thus, as shown in the right side of FIG. 2, the energy harvester for the road in which the vibration of the piezoelectric plate 10 is induced in accordance with the deformation of the deformation plate 19, but in order to support the impact and wheel load caused by passing the vehicle Since the deformation plate 19 should be provided with a rigidity of a predetermined level or more, it is difficult to secure a deformation amount of the deformation plate 19 which may cause sufficient vibration of the piezoelectric plate 10.

본 발명은 전술한 문제점을 감안하여 창안한 것으로, 도로에 매설되는 압전식 에너지 하비스터에 있어서, 도로에 매설되는 하우징(21)의 일측 내벽에는 압전판(10)의 일단이 고정되고, 압전판(10)의 자유단에는 질량추(11)가 설치되며, 질량추(11) 하부의 하우징(21) 내측 저면에는 반발판(35)이 부착되고, 하우징(21) 상단에는 하우징(21)을 폐쇄히는 상판(22)이 결합되되 상판(22) 표면은 노면에 노출되며, 질량추(11) 상부의 상판(22)을 관통하는 원통형 접촉추(31)가 설치되되 접촉추(31)의 저면에는 반발판(35)이 부착되고, 접촉추(31) 외주면에는 환상(環狀)의 복원판(32)이 부착되되 복원판(32)의 외곽부는 상판(22)에 고정되어, 차륜이 접촉추(31) 상부를 통과함에 따라 복원판(32)이 원추형으로 변형되면서 접촉추(31)가 하강하여 질량추(11)를 타격한 후 복원판(32)이 복원되면서 접촉추(31)가 상승 복귀하고, 타격된 질량추(11)가 하우징(21)에 부착된 반발판(35) 및 질량추(11)에 부착된 반발판(35)을 왕복 충돌하면서 압전판(10)이 진동함을 특징으로 하는 도로용 압전식 에너지 하비스터이다.SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. In a piezoelectric energy harvester embedded in a road, one end of the piezoelectric plate 10 is fixed to one inner wall of the housing 21 embedded in the road, and the piezoelectric plate is fixed. A mass weight 11 is installed at the free end of the 10, and a repellent plate 35 is attached to the inner bottom surface of the housing 21 under the mass weight 11, and the housing 21 is attached to the upper end of the housing 21. Closed top plate 22 is coupled but the surface of the top plate 22 is exposed to the road surface, a cylindrical contact weight 31 penetrating through the top plate 22 of the mass weight 11 is installed but the contact weight 31 of A rebound plate 35 is attached to the bottom surface, and an annular restoration plate 32 is attached to the outer circumferential surface of the contact weight 31, and an outer portion of the restoration plate 32 is fixed to the upper plate 22. As the restoration plate 32 deforms into a cone as the upper portion of the contact weight 31 passes, the contact weight 31 descends and strikes the mass weight 11, and then the restoration plate 32 is restored. While the contact weight 31 rises and returns, the striking mass weight 11 reciprocally collides with the reaction plate 35 attached to the housing 21 and the reaction plate 35 attached to the mass weight 11. Piezoelectric energy harvester for road, characterized in that the plate 10 vibrates.

또한, 도로에 매설되는 하우징(21)의 일측 내벽에는 압전판(10)의 일단이 고정되고, 압전판(10)의 자유단에는 질량추(11)가 설치되며, 압전판(10)의 고정단측 상부에는 압전판(10)을 횡단하는 회동축(43)이 설치되고, 회동축(43)을 축으로 자유롭게 회동하는 회동프레임(40)이 설치되되, 회동프레임(40)의 질량추(11)측 단부에는 회동축(43)과 평행한 축을 가지는 로울러(41)가 자유롭게 회전가능하도록 결합되고 회동프레임(40)의 타 단부에는 지지판(42)이 형성되며, 하우징(21) 상단에는 하우징(21)을 폐쇄히는 상판(22)이 결합되되 상판(22) 표면은 노면에 노출되며, 지지판(42) 상부의 상판(22)을 관통하는 원통형 접촉추(31)가 설치되어, 차륜이 접촉추(31) 상부를 통과함에 따라 접촉추(31) 저면에 접하는 지지판(42)이 하강 회동하고, 로울러(41)는 상승 회동하면서 로울러(41)가 압전판(10)의 자유단을 상승시킨 후 자중에 의하여 하강 회동하고, 로울러(41)에 의하여 자유단이 상승된 압전판(10)이 진동함을 특징으로 하는 도로용 압전식 에너지 하비스터이다.
In addition, one end of the piezoelectric plate 10 is fixed to one inner wall of the housing 21 embedded in the road, and a mass weight 11 is installed at the free end of the piezoelectric plate 10 to fix the piezoelectric plate 10. A rotating shaft 43 traversing the piezoelectric plate 10 is installed at the upper end side, and a rotating frame 40 freely rotating about the rotating shaft 43 is installed, and the mass weight 11 of the rotating frame 40 is provided. At the side end, the roller 41 having an axis parallel to the rotating shaft 43 is rotatably coupled, and a supporting plate 42 is formed at the other end of the rotating frame 40, and a housing The top plate 22 for closing 21 is coupled, but the top plate 22 surface is exposed on the road surface, and a cylindrical contact weight 31 penetrating the top plate 22 on the upper side of the support plate 42 is installed, and the wheels are in contact. As passing through the upper portion of the weight 31, the support plate 42 in contact with the bottom surface of the contact weight 31 is rotated downward, the roller 41 is rotated upward while the roller 41 The piezoelectric energy harvester for roads, characterized in that the piezoelectric plate 10, in which the free end of the piezoelectric plate 10 is raised and then rotated down by its own weight, and the piezoelectric plate 10 having the free end raised by the roller 41 vibrates. to be.

본 발명을 통하여, 압전식 에너지 하비스터의 압전판(10) 진동 민감도를 확보함으로써 발전효율을 제고하고, 압전판(10)의 과변형 및 파손을 방지함으로써 도로 매설 에너지 하비스터의 내구성을 확보하는 효과를 얻을 수 있다.
Through the present invention, it is possible to improve the power generation efficiency by securing the vibration sensitivity of the piezoelectric plate 10 of the piezoelectric energy harvester, and to ensure the durability of the road-embedded energy harvester by preventing overdeformation and breakage of the piezoelectric plate 10. The effect can be obtained.

도 1은 압전판의 발전방식 설명도
도 2는 종래의 도로 매설형 에너지 하비스터의 대표 단면도
도 3은 본 발명의 타격식 실시예 대표 단면 및 사시도
도 4는 도 3 실시예의 분해사시도
도 5는 도 3 실시예의 부분절단 분해사시도
도 6은 도 3 실시예의 복원판 발췌 부분절단 사시도
도 7은 도 3 실시예의 작동방식 설명도
도 8은 회동프레임이 적용된 본 발명의 실시예 부분절단 분해사시도
도 9는 도 8 실시예의 요부 발췌 부분절단 사시도
도 10은 도 8 실시예의 작동방식 설명도1 is an explanatory diagram of a power generation method of a piezoelectric plate
2 is a representative cross-sectional view of a conventional road buried energy harvester
3 is a representative cross-sectional view and perspective view of the hitting embodiment of the present invention
4 is an exploded perspective view of the embodiment of FIG.
5 is an exploded perspective view of a partial cutaway of the embodiment of FIG.
FIG. 6 is a perspective view illustrating a partial cutaway of the restoration plate of FIG.
7 is an explanatory view of the operation method of the embodiment of FIG.
8 is an exploded perspective view showing an embodiment of the present invention to which a rotation frame is applied
Figure 9 is a perspective view of the main portion of the excerpt of Figure 8 embodiment
10 is an explanatory diagram of the operation method of the embodiment of FIG.

본 발명의 상세한 구성 및 원리를 첨부된 도면을 통하여 설명하면 다음과 같다.The detailed configuration and principle of the present invention will be described with reference to the accompanying drawings.

우선 도 3은 본 발명의 타격식 실시예로서, 도시된 바와 같이 노면에 상판(22) 표면이 노출된 상태로 매설되며, 상판(22)을 관통하여 노출된 접촉추(31)가 설치된다.First, FIG. 3 is a striking embodiment of the present invention. As shown in FIG. 3, the surface of the upper plate 22 is embedded on the road surface, and the contact weight 31 exposed through the upper plate 22 is installed.

상판(22) 하부의 장방형 하우징(21)에는 도 4에서와 같이, 캔틸레버 형식의 압전판(10)이 설치되는데, 압전판(10)의 자유단에는 고유진동수를 조절할 수 있는 질량추(11)가 설치된다.As shown in FIG. 4, a cantilever-type piezoelectric plate 10 is installed in the rectangular housing 21 under the upper plate 22, and the free weight of the piezoelectric plate 10 can adjust the natural frequency 11. Is installed.

도 5는 도 3 실시예의 부분절단 분해사시도로서, 동 도면을 통하여 알 수 있는 바와 같이, 질량추(11) 하부의 하우징(21) 내측 저면 및 접촉추(31)의 저면에는 각각 반발판(35)이 부착되고, 상판(22)을 관통하여 설치된 원통형의 접촉추(31) 외주면에는 환상(環狀)의 복원판(32)이 부착되되 복원판(32)의 외곽부는 상판(22)에 고정된다.FIG. 5 is an exploded perspective view of a partially cut away embodiment of the embodiment of FIG. 3, and as shown in FIG. 3, a repellent plate 35 is provided on the inner bottom surface of the housing 21 and the bottom surface of the contact weight 31, respectively, below the mass weight 11. Is attached, and an annular restoration plate 32 is attached to the outer circumferential surface of the cylindrical contact weight 31 installed through the upper plate 22, and an outer portion of the restoration plate 32 is fixed to the upper plate 22. do.

복원판(32)은 차륜 통과시 하강한 접촉추(31)를 상승상태로 복원시키는 역할과 접촉추(31)의 승강과정에서 하우징(21) 내부로 분진 등의 오염물이 유입되는 것을 차단하는 역할을 수행하며, 도 6에서와 같이 환상(環狀)의 탄성체로서 중심부는 접촉추(31)에 결합 고정되고 외곽부는 상판(22) 저면에 결합 고정된다.The restoration plate 32 serves to restore the lowered contact weight 31 to an elevated state when passing through the wheel and to block contaminants such as dust into the housing 21 during the lifting of the contact weight 31. As shown in FIG. 6, the central portion is fixed to the contact weight 31 and the outer portion is fixed to the bottom surface of the upper plate 22 as shown in FIG. 6.

도 7은 전술한 타격식 실시예의 단계별 작동상태를 도시한 것으로, 우선, 상판(22)을 통과하는 차륜이 접촉추(31)에 도달하면 차륜하중에 의하여 접촉추(31)가 하강함과 동시에 복원판(32)이 원추형으로 변형되고. 접촉추(31) 저면에 부착된 반발판(35)이 질량추(11)를 타격하게 된다.7 shows a step-by-step operating state of the above-described hitting embodiment, first, when the wheel passing through the upper plate 22 reaches the contact weight 31, and at the same time the contact weight 31 is lowered by the wheel load Restoration plate 32 is deformed into a cone. The reaction plate 35 attached to the bottom surface of the contact weight 31 strikes the mass weight 11.

질량추(11)를 타격한 접촉추(31)는 복원판(32)의 변형이 복원됨에 따라 원위치로 상승 복귀하게 되고, 타격된 질량추(11)는 하우징(21) 저면의 반발판(35)과 충돌한 후 반발 상승하고, 접촉추(31) 저면에 부착된 반발판(35)과 재차 충돌한 후 반발 하강하는 과정을 반복하면서 압전판(10)이 진동하게 된다.The contact weight 31 striking the mass weight 11 is raised and returned to its original position as the deformation of the restoring plate 32 is restored, and the striking mass weight 11 is the rebound plate 35 at the bottom of the housing 21. ) And the rebound rises, collides with the rebound plate 35 attached to the bottom of the contact weight 31, and then repeats the rebound descending process, thereby causing the piezoelectric plate 10 to vibrate.

자동차의 중량은 접촉추(31) 및 질량추(11)에 비하여 월등하게 크므로, 제한된 접촉추(31)의 변위조건 하에서도 상당수준의 운동량이 질량추(11)에 전달되며, 따라서 공간의 제약이 없다면 질량추(11)의 운동에너지에 의하여 압전판(10)에 과도한 변형이 발생하여 일종의 취성체인 압전판(10)이 파손될 수 있다.Since the weight of the vehicle is significantly greater than that of the contact weight 31 and the mass weight 11, a considerable amount of momentum is transmitted to the mass weight 11 even under the limited displacement condition of the contact weight 31, and thus If there is no restriction, excessive deformation may occur in the piezoelectric plate 10 due to the kinetic energy of the mass weight 11, and thus the piezoelectric plate 10, which is a kind of brittle body, may be damaged.

또한, 협소한 하우징(21) 내부에서 압전판(10)의 과변형이 발생될 경우 하우징(21)과 질량추(11)의 충돌 충격으로 인하여 압전판(10)이 파손될 수도 있다.In addition, when an over deformation of the piezoelectric plate 10 occurs in the narrow housing 21, the piezoelectric plate 10 may be damaged due to a collision shock between the housing 21 and the mass weight 11.

따라서, 본 발명에서는 변형량을 적절한 수준으로 억제하면서도 과도한 감쇄로 인한 진동판의 진동 소실은 방지할 수 있도록 진폭이 큰 초기 진동시 질량추(11)가 반발판(35)을 왕복 충돌하면서 제한된 변위폭 하에서도 진동 포텐셜(potential)을 유지할 수 있도록 하고, 이후 진폭이 감소하면 반발판(35)과의 충돌 없이 자유진동을 최대한 지속할 수 있도록 한다.Therefore, in the present invention, the mass weight 11 reciprocates the repulsion plate 35 during the initial vibration with a large amplitude so as to suppress the deformation amount to an appropriate level while preventing vibration loss of the vibration plate due to excessive attenuation under a limited displacement width. It is also possible to maintain the vibration potential (potential), and then to reduce the amplitude to maintain the free vibration as possible without colliding with the backlash plate (35).

도 8은 접촉추(31)가 압전판(10)을 직접 타격하지 않고, 회동프레임(40)을 통하여 간접 타격할 수 있도록 구성한 실시예로서, 접촉추(31)에 의하여 회동하는 회동프레임(40) 선단의 로울러(41)가 압전판(10)을 단발 타격한 후 접촉추(31) 및 회동프레임(40)이 압전판(10)의 진동을 간섭하지 않도록 한 것이다.8 is an embodiment in which the contact weight 31 can be indirectly hit through the rotating frame 40 without directly hitting the piezoelectric plate 10. The rotating frame 40 rotates by the contact weight 31. After the roller 41 at the tip hits the piezoelectric plate 10 with a single stroke, the contact weight 31 and the rotation frame 40 do not interfere with the vibration of the piezoelectric plate 10.

이러한, 회동프레임(40) 적용 실시예는 도 8 및 도 9에서와 같이, 압전판(10)의 고정단측 상부에는 압전판(10)을 횡단하는 회동축(43)이 설치되고, 회동축(43)을 축으로 자유롭게 회동하는 회동프레임(40)이 설치되되, 회동프레임(40)의 질량추(11)측 단부에는 회동축(43)과 평행한 축을 가지는 로울러(41)가 자유롭게 회전가능하도록 결합되고 회동프레임(40)의 타 단부에는 지지판(42)이 형성된 구조를 가진다.8 and 9, in the embodiment of applying the rotating frame 40, a rotating shaft 43 that traverses the piezoelectric plate 10 is installed on the fixed end side of the piezoelectric plate 10, and the rotating shaft ( Rotating frame 40 for rotating the shaft 43 freely is installed, but the roller 41 having an axis parallel to the rotating shaft 43 at the end of the mass weight 11 side of the rotating frame 40 to be freely rotatable It is coupled to the other end of the rotating frame 40 has a structure in which a support plate 42 is formed.

도 10에서와 같이, 지지판(42) 상부의 상판(22)을 관통하는 원통형 접촉추(31)는 지지판(42) 상측에 설치되어, 차륜이 접촉추(31) 상부를 통과함에 따라 접촉추(31) 저면에 접하는 지지판(42)이 하강 회동하고, 로울러(41)는 상승 회동하면서 로울러(41)가 압전판(10)의 자유단을 상승시킨게 된다.As shown in FIG. 10, the cylindrical contact weight 31 penetrating the upper plate 22 on the upper side of the support plate 42 is installed on the upper side of the support plate 42, and as the wheel passes through the upper portion of the contact weight 31, the contact weight ( 31) The support plate 42 which is in contact with the bottom surface rotates downward, and the roller 41 rotates up and the roller 41 raises the free end of the piezoelectric plate 10.

상승하는 로울러(41)에 의하여 압전판(10)에는 휨변형이 발생되는데, 차량 통과에 따라 접촉추(31)에 작용하는 차륜하중이 해제되면 로울러(41) 및 회동프레임(40)의 자중에 의하여 로울러(41)는 신속하게 하강하여 압전판(10)의 진동공간을 확보하게 되고, 이후 압전판(10)은 외력의 간섭 없이 자유로운 진동을 지속하게 된다.Bending deformation occurs in the piezoelectric plate 10 due to the rising roller 41. When the wheel load acting on the contact weight 31 is released as the vehicle passes, the roller 41 and the rotating frame 40 weigh themselves. As a result, the roller 41 descends quickly to secure the vibration space of the piezoelectric plate 10, and then the piezoelectric plate 10 maintains free vibration without interference of external force.

이상에서와 같은 본 발명을 통하여, 압전판(10)에 직접 작용하는 충격이나 과도한 변형은 최대한 억제하면서도 압전판(10)의 진동 민감도 및 진동 포텐셜(potential)은 최대한 확보함으로써 도로 매설형 압전식 에너지 하비스터의 발전효율을 제고할 수 있다.
Through the present invention as described above, road buried piezoelectric energy by securing the maximum vibration sensitivity and vibration potential of the piezoelectric plate 10 while suppressing the impact or excessive deformation directly acting on the piezoelectric plate 10 as possible The power generation efficiency of the harvester can be improved.

10 : 압전판
11 : 질량추
19 : 변형판
21 : 하우징(housing)
22 : 상판
31 : 접촉추
32 : 복원판
35 : 반발판
40 : 회동프레임
41 : 로울러
42 : 지지판
43 : 회동축10: piezoelectric plate
11: mass weight
19: variation
21: housing
22: top plate
31: contact weight
32: Restored Edition
35: rebound
40: Rotating frame
41: roller
42: support plate
43: rotating shaft

Claims (2)

도로에 매설되는 압전식 에너지 하비스터에 있어서,
도로에 매설되는 하우징(21)의 일측 내벽에는 압전판(10)의 일단이 고정되고;
압전판(10)의 자유단에는 질량추(11)가 설치되며;
질량추(11) 하부의 하우징(21) 내측 저면에는 반발판(35)이 부착되고;
하우징(21) 상단에는 하우징(21)을 폐쇄히는 상판(22)이 결합되되 상판(22) 표면은 노면에 노출되며;
질량추(11) 상부의 상판(22)을 관통하는 원통형 접촉추(31)가 설치되되 접촉추(31)의 저면에는 반발판(35)이 부착되고;
접촉추(31) 외주면에는 환상(環狀)의 복원판(32)이 부착되되 복원판(32)의 외곽부는 상판(22)에 고정되어, 차륜이 접촉추(31) 상부를 통과함에 따라 복원판(32)이 원추형으로 변형되면서 접촉추(31)가 하강하여 질량추(11)를 타격한 후 복원판(32)이 복원되면서 접촉추(31)가 상승 복귀하고, 타격된 질량추(11)가 하우징(21)에 부착된 반발판(35) 및 질량추(11)에 부착된 반발판(35)을 왕복 충돌하면서 압전판(10)이 진동함을 특징으로 하는 도로용 압전식 에너지 하비스터.
In the piezoelectric energy harvester embedded in the road,
One end of the piezoelectric plate 10 is fixed to one inner wall of the housing 21 embedded in the road;
A mass weight 11 is installed at the free end of the piezoelectric plate 10;
A repellent plate 35 is attached to the inner bottom surface of the housing 21 below the mass weight 11;
A top plate 22 for closing the housing 21 is coupled to the top of the housing 21, and the top plate 22 surface is exposed to the road surface;
A cylindrical contact weight 31 penetrating the upper plate 22 on the upper part of the mass weight 11 is installed, and a repellent plate 35 is attached to the bottom of the contact weight 31;
An annular restoration plate 32 is attached to the outer circumferential surface of the contact weight 31, but an outer portion of the restoration plate 32 is fixed to the upper plate 22, and the wheel is restored as the wheel passes through the upper portion of the contact weight 31. As the plate 32 is deformed into a conical shape, the contact weight 31 descends and strikes the mass weight 11, and then as the restoration plate 32 is restored, the contact weight 31 rises and returns, and the hit mass weight 11 Piezoelectric energy hobby for road, characterized in that the piezoelectric plate 10 vibrates while reciprocating collision of the reaction plate 35 attached to the housing 21 and the reaction plate 35 attached to the mass weight 11). Ster.
도로에 매설되는 압전식 에너지 하비스터에 있어서,
도로에 매설되는 하우징(21)의 일측 내벽에는 압전판(10)의 일단이 고정되고;
압전판(10)의 자유단에는 질량추(11)가 설치되며;
압전판(10)의 고정단측 상부에는 압전판(10)을 횡단하는 회동축(43)이 설치되고;
회동축(43)을 축으로 자유롭게 회동하는 회동프레임(40)이 설치되되, 회동프레임(40)의 질량추(11)측 단부에는 회동축(43)과 평행한 축을 가지는 로울러(41)가 자유롭게 회전가능하도록 결합되고 회동프레임(40)의 타 단부에는 지지판(42)이 형성되며;
하우징(21) 상단에는 하우징(21)을 폐쇄히는 상판(22)이 결합되되 상판(22) 표면은 노면에 노출되며;
지지판(42) 상부의 상판(22)을 관통하는 원통형 접촉추(31)가 설치되어, 차륜이 접촉추(31) 상부를 통과함에 따라 접촉추(31) 저면에 접하는 지지판(42)이 하강 회동하고, 로울러(41)는 상승 회동하면서 로울러(41)가 압전판(10)의 자유단을 상승시킨 후 자중에 의하여 하강 회동하고, 로울러(41)에 의하여 자유단이 상승된 압전판(10)이 진동함을 특징으로 하는 도로용 압전식 에너지 하비스터.In the piezoelectric energy harvester embedded in the road,
One end of the piezoelectric plate 10 is fixed to one inner wall of the housing 21 embedded in the road;
A mass weight 11 is installed at the free end of the piezoelectric plate 10;
A rotating shaft 43 that traverses the piezoelectric plate 10 is provided at the upper end of the fixed end side of the piezoelectric plate 10;
Rotating frame 40 is installed to rotate freely about the rotating shaft 43 to the axis, the roller 41 having an axis parallel to the rotating shaft 43 at the end of the mass weight 11 side of the rotating frame 40 freely It is rotatably coupled and the support plate 42 is formed at the other end of the rotation frame 40;
A top plate 22 for closing the housing 21 is coupled to the top of the housing 21, and the top plate 22 surface is exposed to the road surface;
The cylindrical contact weight 31 penetrating the upper plate 22 above the support plate 42 is installed, and as the wheel passes through the upper contact weight 31, the support plate 42 contacting the bottom surface of the contact weight 31 rotates downwardly. In addition, the roller 41 rotates up and down while the roller 41 raises the free end of the piezoelectric plate 10, and then rotates downward by its own weight. The piezoelectric plate 10 having the free end raised by the roller 41 is rotated. A piezoelectric energy harvester for roads characterized by this vibration.
KR1020100061253A 2010-06-28 2010-06-28 Piezoelectric road energy harvester KR100988077B1 (en)

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