KR102602967B1 - The Hybrid Road Stud Based on Energy Harvesting - Google Patents

Abstract

The present invention relates to an energy harvesting-based hybrid road sign bottle. The energy harvesting-based hybrid road sign bottle according to one aspect of the present invention includes an energy harvesting element and a battery connected in parallel with the energy harvesting element to provide power. A power supply unit provided, a load that receives power from the power supply unit and turns on, a battery connection control unit that outputs a control voltage to control whether or not to supply power to the power unit based on the output voltage of the battery, and turns on and off according to the control voltage and powers the power unit. The power switch that determines supply and when the power switch is turned on receives power from the power source, connects or disconnects the power source and the load according to a preset cycle, and allows the accumulated voltage to be intermittently provided to the load according to the preset cycle. Includes a load connection control unit.

Description

The Hybrid Road Stud Based on Energy Harvesting}

The present invention relates to a road sign bottle, and more specifically, to a road sign bottle that includes an energy harvesting element and lights up with power generated from the energy harvesting element.

A road sign bottle is a device that is installed at the border of a road and emits light so that drivers and pedestrians can clearly see the border of the road. In relation to this, conventional road signs, including photovoltaic cells, that accumulate power using sunlight as an energy source during the day and light up at night have been introduced.

Road sign bottles containing such conventional photocells are easy to install, easy to maintain, and have the advantage of reducing electricity bills, but due to the nature of being supplied with power from photocells, they have limitations in that they cannot be used in environments with low light intensity.

In particular, in the case of tunnels, since there is no sunlight, road sign bottles containing conventional photovoltaic cells cannot be applied, so road sign bottles that light up by receiving power from the outside through power lines are used.

In this case, an additional power line for the road sign bottle must be installed to supply power, which increases installation and maintenance costs, and there is a problem in that electricity must be used separately to light the road sign bottle.

Republic of Korea Patent Application No. 10-2018-0008078 Republic of Korea Patent Application No. 10-2013-0127186

The purpose of the present invention is to solve the above problems, and is an energy harvesting-based hybrid road that can be lit with power generated from the energy harvesting element even in an environment where power is provided below the voltage to light the load from the energy harvesting element. A label bottle is provided.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned can be clearly understood from the description below.

An energy harvesting-based hybrid road sign bottle according to an aspect of the present invention for achieving the above-described object includes an energy harvesting element, a power supply unit that provides power including a battery connected in parallel with the energy harvesting element, and power supply from the power supply unit. A battery-connected control unit that outputs a control voltage to control whether or not to supply power to the power unit based on the load that receives and lights the output voltage of the battery, a power switch and power supply that turns on and off depending on the control voltage and determines whether or not to supply power to the power unit. It receives power from the power supply unit when the switch is turned on, connects or disconnects the power supply unit and the load according to a preset cycle, and includes a load connection control unit that intermittently provides the accumulated voltage to the load according to the preset cycle.

According to the present invention, there is an effect of providing an energy harvesting-based hybrid road sign bottle that can be lit with power generated from the energy harvesting element even in an environment where power is provided below the voltage to light the load.

Accordingly, the effect of providing an energy harvesting-based hybrid road sign bottle that can be lit with power generated from photovoltaic cells can be expected even in environments with insufficient light, such as tunnels, where there are no other light sources other than lighting.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Figure 1 is a circuit diagram of an energy harvesting-based hybrid road sign bottle according to an embodiment of the present invention.
Figure 2 is a diagram showing the waveform of the voltage output from each node of the circuit diagram of the energy harvesting-based hybrid road sign bottle according to an embodiment of the present invention.
Figure 3 is a schematic diagram of an energy harvesting-based hybrid road sign bottle according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms, but the present embodiments only serve to ensure that the disclosure of the present invention is complete, and those skilled in the art It is provided to fully inform the person of the scope of the invention, and the present invention is defined only by the claims. Meanwhile, the terms used in this specification are for describing embodiments and are not intended to limit the present invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context.

Referring to FIG. 1, the energy harvesting-based hybrid road sign bottle 10 according to an embodiment of the present invention includes a power source 110, a load 120, a battery connection control unit 140, a power switch 150, It may include a load connection control unit 200.

The power supply unit 110 may include an energy harvesting element 111 and a battery 113 connected in parallel with the energy harvesting element 111 and charged by the electrical energy generated by the energy harvesting element 111.

Here, the energy harvesting element 111 may be at least one of a photovoltaic cell that converts light energy into electrical energy, a thermoelectric element that converts heat energy into electrical energy, and a vibration element that converts vibration energy into electrical energy.

The electrical energy generated by the energy harvesting element 111 first charges the battery 113, and after the battery 113 is fully charged, power may be supplied to the load 120. Accordingly, even when the power obtained from the energy harvesting element 111 is small, a voltage sufficient to light the load 120 can be provided through the battery 113.

According to the above configuration, the energy harvesting-based hybrid road sign bottle 10 according to an embodiment of the present invention can be hybrid driven with heterogeneous power sources.

The load 120 may receive power from the power supply unit 110 and turn on.

The battery connection control unit 140 may output a control voltage for controlling whether or not to supply power to the power supply unit 110 based on the output voltage of the battery 113.

The battery connection control unit 140 compares the output voltage of the battery 113 with a voltage divided according to a preset resistance ratio and a preset threshold voltage to output a control voltage for controlling whether or not to supply power to the power supply unit 110. You can.

At this time, between the power supply unit 110 and the battery connection control unit 140, there is a first distribution resistor 131, one end of which is connected to the power supply unit, and a second distribution resistor 131, one end of which is connected to the other end of the first distribution resistor 131 and the other end of which is grounded. A distribution resistor 133 may be further provided.

The battery connection control unit 140 may receive the voltage output from the other end of the first distribution resistor 131 and one end of the second distribution resistor 133. The battery connection control unit 140 receives the output voltage of the battery 113 divided according to the resistance value of the first distribution resistor 131 and the resistance value of the second distribution resistor 133 and compares it with a preset threshold voltage. Thus, a control voltage for controlling whether or not power is supplied to the power supply unit 110 may be output.

The battery connection control unit 140 determines that the voltage divided by the output voltage of the battery 113 according to the preset resistance ratio is smaller than the preset threshold voltage (for example, 3.6V when connected to a load operating at 3.5V or higher). A control voltage having a preset high level voltage value may be output to cut off the power supply to the ground power supply unit 110.

The battery connection control unit 140 has a preset low-level voltage value for supplying power from the power supply unit 110 when the voltage divided by the output voltage of the battery 113 according to the preset resistance ratio is higher than the preset threshold voltage. It may be outputting a control voltage.

Here, the low level voltage value may be set smaller than the threshold voltage value of the power switch 150 and the high level voltage value may be set larger than the threshold voltage value of the power switch 150.

The power switch 150 turns on and off according to the control voltage output from the battery connection control unit 140 and determines whether to supply power to the power supply unit 110.

When the power switch 150 is turned on, it connects the power supply unit 110 and the load connection control unit 200 to supply power from the power supply unit 110 to the load connection control unit 200, and when it is turned off, the power supply unit 110 The power supply from the power supply unit 110 to the load connection control unit 200 can be blocked by blocking the load connection control unit 200.

The power switch 150 may be composed of a PMOS whose source terminal is connected to one end of the power supply unit 110, whose drain terminal is connected to the load connection control unit 200, and which receives a control voltage at the gate terminal.

When a control voltage having a preset high level voltage value is output from the battery connection control unit 140, the power switch 150 is turned off and opens to block the power supply from the power supply unit 110 to the load connection control unit 200. .

When a control voltage having a preset low level voltage value is output from the battery connection control unit 140, the power switch 150 is turned on and is short-circuited to allow power to be supplied from the power supply unit 110 to the load connection control unit 200. there is.

According to the above configuration, in a situation where the energy harvesting element 111 cannot generate power due to indoor lighting being turned off due to an accident such as a tunnel collapse or power cut, the load 120 receives power from the battery 113 for a predetermined period of time. It may light up.

And, by blocking the power supply to the load 120 according to the output voltage of the battery 113, the battery 113 is prevented from being completely discharged. After the accident is resolved, the battery 113 is charged by receiving power from the energy harvesting element 111 and can be automatically restored. Accordingly, there is an advantage in preventing replacement of the battery 113 due to complete discharge.

The load connection control unit 200 receives power from the power unit 110 when the power switch 150 is turned on, connects or disconnects the power unit 110 and the load 120 according to a preset cycle, and connects or disconnects the power supply unit 110 and the load 120 according to the preset cycle. The accumulated voltage is intermittently provided to the load 120.

The load connection control unit 200 includes a first switch 210, a first resistor 220, a first capacitor 230, a comparator 240, a first delay unit 250, an inverter 260, and a second delay unit. It may include a unit 270 and a second switch 280.

The first switch 210 may connect or disconnect the power supply unit 110 and the load 120 depending on the on/off operation.

When the first switch 210 is turned on, it connects the power supply unit 110 and the load 120 to supply power from the power supply unit 110 to the load 120, and when it is turned off, the power supply unit 110 and the load ( By blocking 120, the power supply from the power supply unit 110 to the load 120 can be blocked.

)을 입력받는 PMOS로 이루어지는 것일 수 있다.The first switch 210 has a source terminal connected to the other end (drain terminal) of the power switch 150, a drain terminal connected to the load 120, and a comparison voltage (

) may be composed of a PMOS that receives input.

The first switch 210 receives power from the power supply unit 110 according to the on operation of the power switch 150, operates on or off according to the comparison voltage, and supplies power provided from the power supply unit 110 to the load 120. Alternatively, power supply from the power supply unit 110 to the load 120 can be blocked.

The first switch 210 is turned on when a comparison voltage having a preset low level voltage value is input to the gate terminal and is short-circuited, thereby supplying the power provided from the drain terminal of the power switch 150 to the load 120.

The first switch 210 is turned off and opened when a comparison voltage having a preset high level voltage value is input to the gate terminal, thereby blocking the power supply from the drain terminal of the power switch 150 to the load 120.

One end of the first resistor 220 may be connected to the other end (drain end) of the power switch 150 to receive power from the power supply unit 110 when the power switch 150 is turned on.

The first capacitor 230 can be charged by receiving power from the power supply unit 110.

One end of the first capacitor 230 may be connected to the other end of the first resistor 220 and the other end may be grounded. The first capacitor 230 may be charged by receiving power from the power supply unit 110 through the first resistor 220.

)과 기설정된 기준전압(

)을 비교하여 제1 커패시터(230)의 전압(

)이 기준전압(

)이상이면 제1 스위치(210)를 온 동작시키기 위한 전압값을 가지는 비교전압(

)을 출력하는 것일 수 있다.The comparator 240 is the voltage of the first capacitor 230 (

) and the preset reference voltage (

) by comparing the voltage of the first capacitor 230 (

) is the reference voltage (

) or more, the comparison voltage (which has a voltage value for turning on the first switch 210)

) may be output.

)을 입력받는 것일 수 있다.The comparator 240 may be made of an OP AMP that is driven by receiving power from the power supply unit 110. The comparator 240 receives a preset reference voltage through the first input terminal, which is the + input terminal of the OP AMP, and receives the voltage (

) may be input.

)이 기준전압(

)이상이면 출력단으로 제1 스위치(210)를 온 동작시기키 위한 기설정된 로우레벨 전압값을 가지는 비교전압(

)을 출력하는 것일 수 있다.The comparator 240 is the voltage of the first capacitor 230 (

) is the reference voltage (

) or more, the comparison voltage (which has a preset low level voltage value for turning on the first switch 210 at the output terminal)

) may be output.

)이 기준전압(

)보다 작으면 출력단으로 제1 스위치(210)를 오프 동작시키기 위한 기설정된 하이레벨 전압값을 가지는 비교전압(

)을 출력하는 것일 수 있다.The comparator 240 is the voltage of the first capacitor 230 (

) is the reference voltage (

), the comparison voltage (which has a preset high level voltage value for turning off the first switch 210 at the output terminal

) may be output.

Here, the low level voltage value may be set smaller than the threshold voltage value of the first switch 210 and the high level voltage value may be set larger than the threshold voltage value of the first switch 210.

)의 상승엣지(Rising edge) 또는 하강엣지(Falling edge)의 기울기를 조정하여 출력하는 것일 수 있다.The first delay unit 250 is a comparison voltage output from the comparator 240 (

) may be output by adjusting the slope of the rising edge or falling edge.

The first delay unit 250 includes a second resistor 251, one end of which is connected to the output terminal of the comparator 240, and a second capacitor 253, one end of which is connected to the other end of the second resistor 251 and the other end of which is grounded. It may be.

)의 상승엣지 또는 하강에지에서 제2 저항(251)의 저항값 또는 제2 커패시터(253)의 정전용량에 따른 기울기를 가지도록 비교전압(

)의 기울기를 조정한 전압(

)을 출력하는 것일 수 있다.The first delay unit 250 is provided with a comparison voltage (

) at the rising edge or falling edge of the comparison voltage (

) voltage (

) may be output.

)의 상승엣지와 하강엣지의 기울기를 눕혀서 출력하는 것일 수 있다.The first delay unit 250 is a comparison voltage output from the comparator 240 as shown in FIG. 2 (

) may be output by laying down the slope of the rising and falling edges.

The second resistor 251 of the first delay unit 250 may be made of a variable resistor. The second resistor 251 may be physically connected to the first operating means 301 for changing the resistance value of the second resistor 251 according to the user's manipulation. The resistance value of the second resistor 251 may change according to the user's manipulation of the first operating means 301. For example, the resistance value of the second resistance 251 may increase in response to the user rotating the first operating means 301 in the first direction, and the user may rotate the first operating means 301 in the first direction. In response to rotation in the second direction opposite to , the resistance value of the second resistor 251 may decrease.

Referring to FIG. 3, the energy harvesting-based hybrid road sign bottle 10 may be formed to protrude at a predetermined height. In addition, the energy harvesting element 111, the load 120, the first operating means 301, and the second operating means 303 may be exposed to the outside of the energy harvesting-based hybrid road sign bottle 10. there is.

The energy harvesting element 111 is provided on the top of the energy harvesting-based hybrid road sign bottle 10 and can receive optical energy generated from an external light source and convert it into electrical energy. Although the drawing shows that a photovoltaic cell is used as the energy harvesting element 111, it is not limited thereto.

The load 120 blinks by the power generated by the energy harvesting element 111 and may indicate the boundary of the road.

The first operating means 301 rotates according to the user's manipulation and can change the resistance value of the second resistor 251. The second operating means 303 rotates according to the user's manipulation and can change the resistance value of the third resistor 271. The user can adjust the flashing cycle of the load 120 by manipulating the first operating means 301 or the second operating means 303.

)을 반전시켜 출력하는 것일 수 있다.The inverter 260 is the voltage output from the first delay unit 250 (

) may be reversed and output.

)을 입력받는 것일 수 있다.The inverter 260 has an input terminal connected to the other end of the second resistor 251 and one end of the second capacitor 253, and the voltage output from the first delay unit 250 (

) may be input.

)의 전압값이 기설정된 제1 임계값보다 작아진 시점 이후부터 제1 딜레이부(250)에서 출력되는 전압(

)의 전압값이 기설정된 제2 임계값보다 커지는 시점 이전까지 기설정된 로우레벨 전압값을 가지는 전압(

)을 출력하는 것일 수 있다.The inverter 260 consists of a Schmitt trigger inverter and the voltage output from the first delay unit 250 (

) output from the first delay unit 250 after the voltage value becomes smaller than the preset first threshold (

A voltage (

) may be output.

)의 전압값이 기설정된 제2 임계값보다 커지는 시점 이후부터 제1 딜레이부(250)에서 출력되는 전압(

)의 전압값이 기설정된 제1 임계값보다 작아진 시점 이전까지 기설정된 하이레벨 전압값을 가지는 전압(

)을 출력하는 것일 수 있다.And, the inverter 260 is the voltage output from the first delay unit 250 (

The voltage (

A voltage (

) may be output.

)의 상승엣지 또는 하강엣지의 기울기를 조정하여 출력하는 것일 수 있다.The second delay unit 270 is the voltage output from the inverter 260 (

) may be output by adjusting the slope of the rising or falling edge.

)을 입력받을 수 있다. 제3 커패시터(273)는 일단이 제3 저항(271)의 타단 및 제2 스위치(280)와 연결되고 타단이 접지되는 것일 수 있다.The second delay unit 270 may be composed of a third resistor 271 and a third capacitor 273. The third resistor 271 has one end connected to the output terminal of the inverter 260 and the voltage output from the inverter 260 (

) can be input. The third capacitor 273 may have one end connected to the other end of the third resistor 271 and the second switch 280, and the other end may be grounded.

)의 상승엣지 또는 하강엣지에서 제3 저항(271)의 저항값 또는 제3 커패시터(273)의 정전용량에 따른 기울기를 가지도록 반전기(260)에서 출력되는 전압(

)의 기울기를 조정한 전압(

)을 출력하는 것일 수 있다.The second delay unit 270 is the voltage output from the inverter 260 (

The voltage output from the inverter 260 to have a slope according to the resistance value of the third resistor 271 or the capacitance of the third capacitor 273 at the rising edge or falling edge of ) (

) voltage (

) may be output.

)의 상승엣지와 하강엣지의 기울기를 눕혀서 출력할 수 있다.The second delay unit 270 is the voltage output from the inverter 260 as shown in FIG. 2 (

) can be printed by laying down the slope of the rising and falling edges.

One end of the third resistor 271 may be connected to the output terminal of the inverter 260. The third resistor 271 may be made of a variable resistor. The third resistor 271 may be physically connected to the second operating means 303 for changing the resistance value of the third resistor 271 according to the user's manipulation. The resistance value of the third resistor 271 may change according to the user's manipulation of the second operating means 303. For example, the resistance value of the third resistance 271 may increase in response to the user rotating the second operating means 303 in the first direction, and the user rotating the second operating means 303 in the first direction. In response to rotation in the second direction opposite to , the resistance value of the third resistor 271 may decrease.

One end of the third capacitor 273 may be connected to the other end of the third resistor 271 and the other end may be grounded.

The second delay unit 270 is configured to provide opening and closing conditions of the second switch 280 according to a time constant different from that of the first delay unit 250, and may be omitted in some cases. When the second delay unit 270 is omitted, the output of the inverter 260 may be input to the second switch 280.

)이 기준전압(

)보다 작아져 비교기(240)에서 제1 스위치(210)를 오프 동작시키기 위한 전압값을 가지는 비교전압을 출력하도록 한다.The second switch 280 is turned on after a preset delay time from when the first switch 210 is turned on according to the output of the inverter 260, and can cause the first capacitor 230 to be discharged. Accordingly, the voltage of the first capacitor 230 (

) is the reference voltage (

) so that the comparator 240 outputs a comparison voltage having a voltage value for turning off the first switch 210.

The second switch 280 has a source terminal that is grounded, a drain terminal that is connected to the other end of the first resistor 220 and one end of the first capacitor 230, and a gate terminal that receives the voltage output from the inverter 260. It may be made of NMOS.

)에 따라 온오프 동작할 수 있다.When the second delay unit 270 is further provided between the inverter 260 and the second switch 280, the second switch 280 inputs the voltage output from the second delay unit 270 to the gate terminal. The voltage output from the second delay unit 270 (

) can be turned on and off depending on the condition.

The second switch 280 is turned on when a voltage having a voltage value higher than a preset threshold voltage value is input to the gate terminal, and connects the other end of the first resistor 220 and one end of the first capacitor 230 to ground. 1 The capacitor 230 can be discharged. The second switch 280 is turned off when a voltage having a voltage value smaller than the preset threshold voltage value is input to the gate terminal, and the other end of the first resistor 220 and one end of the first capacitor 230 are connected to ground. It can be blocked and the first capacitor 230 can be charged by receiving power from the power supply unit 1120.

)을 지연 및 반전시킴에 따른 전압값에 따라 온오프 동작하며 제1 커패시터(230)가 충방전 되도록 하는 것일 수 있다.That is, the second switch 280 uses a comparison voltage (

) may be turned on and off according to the voltage value by delaying and inverting and allowing the first capacitor 230 to be charged and discharged.

)은 기설정된 주기에 따라 기준전압(

)보다 커지고 작아지는 것을 반복하고, 제1 커패시터(230)의 전압(

)과 기준전압(

)을 비교한 결과에 의해 제1 스위치(210)가 온오프 동작하며 기설정된 주기에 따라 부하(120)에 전원이 공급되도록 한다.Accordingly, the voltage of the first capacitor 230 (

) is the reference voltage (

) and repeats increasing and decreasing, and the voltage of the first capacitor 230 (

) and reference voltage (

), the first switch 210 is turned on and off according to the result of comparing, and power is supplied to the load 120 according to a preset cycle.

The user changes the resistance value of the second resistor 251 or the resistance value of the third resistor 271 and changes the charge/discharge cycle of the first capacitor 230 and the first charge/discharge cycle according to the charge/discharge cycle of the first capacitor 230. The on-off switching cycle of the switch 210 can be adjusted.

Hereinafter, the operation of the load connection control unit 200 will be described in more detail with reference to FIG. 2.

)이 입력되기 시작하면 제1 커패시터에 걸리는 전압(

)이 기준전압(

)을 초과하기 전까지 비교기(240)에서 출력되는 비교전압(

)은 기설정된 하이레벨 전압값까지 증가한다.Voltage supplied from the power unit 110 (

) begins to be input, the voltage applied to the first capacitor (

) is the reference voltage (

The comparison voltage output from the comparator 240 until it exceeds (

) increases to the preset high level voltage value.

)이 기준전압(

)을 초과하기 시작한 시점(t1, t7, t13)부터 로우레벨 전압값을 가지는 비교전압을 출력하기 시작하고, 제1 스위치(210)가 온 동작하며 부하(120)에 기설정된 하이레벨의 전압값을 가지는 전압(

)이 공급된다.And, the comparator 240 is the voltage applied to the first capacitor (

) is the reference voltage (

), the comparison voltage with a low level voltage value begins to be output from the point in time (t1, t7, t13) that begins to exceed ), the first switch 210 turns on, and the high level voltage value preset in the load 120 voltage with (

) is supplied.

)이 하이레벨 전압값에서 로우레벨 전압값으로 변경된 시점(t1, t7, t13)부터 비교전압(

)이 로우레벨 전압값에서 하이레벨 전압값으로 변경되는 시점(t4, t10)까지 출력 전압(

)의 전압값이 기설정된 하이레벨 전압값에서 로우레벨 전압값이 될 때까지 시간에 따라 감소시켜 출력한다.The first delay unit 250 is provided with a comparison voltage of the comparator 240 (

) is changed from a high-level voltage value to a low-level voltage value (t1, t7, t13).

) is changed from a low-level voltage value to a high-level voltage value (t4, t10).

) is output by decreasing the voltage value over time from the preset high level voltage value to the low level voltage value.

)의 전압값이 기설정된 제1 임계값보다 작아진 시점(t2, t8, t14)부터 기설정된 하이레벨 전압값을 가지는 전압(

)을 출력한다.The inverter 260 is the voltage output from the first delay unit 250 (

A voltage (

) is output.

)의 전압값이 로우레벨 전압값에서 하이레벨 전압값으로 변경되는 시점(t2, t8, t14)부터 반전기(260)의 전압()의 전압값이 하이레벨 전압값에서 로우레벨 전압값으로 변경되는 시점(t5, t11)이전까지 전압값이 기설정된 로우레벨 전압값에서 하이레벨 전압값까지 시간에 따라 증가하는 전압(

)을 출력한다.The second delay unit 270 is the voltage output from the inverter 260 (

From the point in time (t2, t8, t14) when the voltage value of ) changes from a low-level voltage value to a high-level voltage value, the voltage of the inverter 260 ( ) is a voltage that increases with time from a preset low-level voltage value to a high-level voltage value before the point (t5, t11) when the voltage value changes from a high-level voltage value to a low-level voltage value (t5, t11).

) is output.

)의 전압값이 증가하기 시작한 시점(t2, t8, t14) 이후 제2 딜레이부(270)에서 출력되는 전압(

)의 전압값이 기설정된 문턱전압을 초과하는 시점(t3, t9, t15)부터 온 동작한다.The second switch 280 is the voltage output from the second delay unit 270 (

The voltage output from the second delay unit 270 after the point in time (t2, t8, t14) when the voltage value of ) begins to increase (

) turns on from the point in time (t3, t9, t15) when the voltage value exceeds the preset threshold voltage.

)은 제2 딜레이부(270)에서 출력되는 전압(

)의 전압값이 기설정된 문턱전압을 초과하는 시점(t3, t9, t15)부터 점차 감소한다.At this time, one end of the first capacitor 230 is connected to ground by the on operation of the second switch 280 and starts discharging. That is, the voltage of the first capacitor 230 (

) is the voltage output from the second delay unit 270 (

) gradually decreases from the point when the voltage value exceeds the preset threshold voltage (t3, t9, t15).

)이 기준전압(

)보다 작아진 시점(t4, t10)부터 하이레벨 전압값을 가지는 비교전압(

)을 출력하고, 이때, 제1 스위치(210)는 오프 동작하게 된다.The comparator 240 generates a voltage of the first capacitor 230 by discharge of the first capacitor 230 (

) is the reference voltage (

), which has a high-level voltage value from the point in time (t4, t10) (

) is output, and at this time, the first switch 210 is turned off.

)이 로우레벨 전압값에서 하이레벨 전압값으로 변경된 시점(t4, t10)부터 비교전압(

)이 하이레벨 전압값에서 로우레벨 전압값으로 변경되는 시점(t7, t13)까지 전압값이 로우레벨 전압값에서 하이레벨 전압값이 될 때까지 시간에 따라 증가하는 전압(

)을 출력한다.The first delay unit 250 is provided with a comparison voltage (

) is changed from a low-level voltage value to a high-level voltage value (t4, t10).

) is a voltage that increases with time until the voltage value changes from a low-level voltage value to a high-level voltage value (t7, t13) when it changes from a high-level voltage value to a low-level voltage value (t7, t13).

) is output.

)의 전압값이 기설정된 제1 임계값보다 작아진 시점(t2, t8, t14) 이후 기설정된 제2 임계값보다 커진 시점(t5, t11)부터 기설정된 로우레벨 전압값을 가지는 전압(

)을 출력한다.The inverter 260 is the voltage output from the first delay unit 250 (

A voltage (

) is output.

)이 하이레벨 전압값에서 로우레벨 전압값으로 변경되는 시점(t5, t11)부터 기설정된 하이레벨 전압값에서 로우레벨 전압값이 될 때까지 시간에 따라 감소하는 전압(

)을 출력한다.The second delay unit 270 is connected to the voltage of the inverter 260 (

) is a voltage that decreases with time from the point when it changes from a high-level voltage value to a low-level voltage value (t5, t11) until it changes from a preset high-level voltage value to a low-level voltage value (

) is output.

)이 기설정된 문턱전압값보다 커진 시점(t3, t9)부터 제2 딜레이부(270)에서 출력되는 전압(

)이 기설정된 문턱전압값보다 이하가 되는 시점(t6, t12)까지는 온 동작하고, 제2 딜레이부(270)에서 출력되는 전압(

)의 전압값이 기설정된 문턱전압값보다 작아진 시점(t6, t12)부터 오프 동작한다.The second switch 280 is the voltage output from the second delay unit 270 (

The voltage (

) is turned on until the point in time (t6, t12) becomes lower than the preset threshold voltage value, and the voltage output from the second delay unit 270 (

) turns off from the point in time (t6, t12) when the voltage value becomes smaller than the preset threshold voltage value.

One end of the first capacitor 230 is disconnected from ground by the off operation of the second switch 280 and is connected to the first resistor 220 to supply power to the power supply unit 110 through the first resistor 220. is supplied and charged.

)은 제2 스위치(280)가 오프 동작을 시작한 시점(t6, t12)부터 시간에 따라 점차 증가한다.The voltage of the first capacitor 230 (

) gradually increases with time from the time when the second switch 280 starts the off operation (t6, t12).

)의 전압이 기준전압(

)보다 작아진 시점(t4, t10)부터 기설정된 로우레벨 전압값을 가지는 비교전압(

)을 출력하다가, 제1 커패시터(230)의 전압(

)의 전압이 기준전압(

)보다 작아진 시점(t4, t10) 이후 제1 커패시터(230)의 전압(

)이 기준전압(

)이상이 된 시점(t7, t13)부터 기설정된 하이레벨 전압값을 가지는 비교전압(

)을 출력할 수 있다.The comparator 240 is the voltage of the first capacitor 230 (

) is the reference voltage (

), the comparison voltage (t4, t10) has a preset low level voltage value.

) while outputting the voltage of the first capacitor 230 (

) is the reference voltage (

), the voltage of the first capacitor 230 after the time point (t4, t10) becomes smaller than (

) is the reference voltage (

) or more, the comparison voltage (t7, t13) has a preset high level voltage value.

) can be output.

)이 기준전압(

)보다 작아진 시점(t4, t10)부터 제1 커패시터(230)의 전압(

)이 기준전압(

)보다 커진 시점(t7, t13)이전까지 오프 동작하며 부하(120)로의 전원 공급을 차단하고, 제1 커패시터(230)의 전압(

)이 기준전압(

)보다 작아진 시점(t4, t10) 이후에 제1 커패시터(230)의 전압(

)이 기준전압(

)보다 커진 시점(t7, t13)부터 온 동작하며 부하(120)로 전원부(110)의 전원을 공급할 수 있다.The first switch 210 is connected to the voltage of the first capacitor 230 (

) is the reference voltage (

), the voltage of the first capacitor 230 from the time point (t4, t10) becomes smaller than (

) is the reference voltage (

It operates off until the time point (t7, t13) becomes greater than ) and blocks the power supply to the load 120, and the voltage of the first capacitor 230 (

) is the reference voltage (

), the voltage of the first capacitor 230 after the time point (t4, t10) becomes smaller than (

) is the reference voltage (

) is turned on from the point in time (t7, t13) when it becomes greater than ) and power of the power supply unit 110 can be supplied to the load 120.

That is, the first capacitor 220 is charged, and a comparison voltage having a voltage value for turning on the first switch 210 is output from the comparator 240, so that the first switch 210 is turned on, and the comparison voltage is turned on. The first capacitor 220 is discharged by the voltage value due to the delay and inversion, and a comparison voltage having a voltage value for turning off the first switch 210 is output from the comparator 240 to turn off the first switch (210). 210) is turned off, and after the first switch 210 is turned off, the first capacitor 220 is recharged by the voltage value resulting from delaying and inverting the comparison voltage, and the first capacitor 220 is charged again according to a preset period. The switch 210 operates on and off and can intermittently supply power to the load 120.

According to the above configuration, the load 120 can be turned on based on energy harvesting even in an environment where the power generated by the energy harvesting element 111 is less than the voltage to turn on the load 120.

For example, the energy harvesting-based hybrid road sign bottle 10 includes a photocell as an energy harvesting element, and lights up with electrical energy generated from the photocell without installing a separate power line in an environment where there are no light sources other than indoor lighting, such as a tunnel. It can be.

Accordingly, since there is no need to separately install power lines for lighting road bottles, installation and maintenance are simpler than before, and the effect of reducing electricity use can be expected.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the scope of the claims described below rather than the detailed description above, and all changes or modified forms derived from the scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

10: Hybrid road sign bottle based on energy harvesting
110: power unit
111: Energy harvesting element
113: battery
120: load
140: Battery connection control unit
150: power switch
200: Load connection control unit
210: first switch
220: first resistance
230: first capacitor
240: comparator
250: 1st delay unit
251: second resistance
253: second capacitor
260: half cell
270: 2nd delay unit
271: Third resistance
273: third capacitor
280: second switch
301: first operating means
303: Second operating means

Claims (6)

A power supply unit that provides power including an energy harvesting element and a battery connected in parallel with the energy harvesting element;
A load that receives power from the power supply unit and lights up;
a battery connection control unit that outputs a control voltage to control whether or not to supply power to the power unit based on the output voltage of the battery;
a power switch that turns on and off according to the control voltage and determines whether to supply power to the power unit; and
A load connection control unit that receives power from the power supply unit when the power switch is turned on, connects or disconnects the power supply unit and the load according to a preset cycle, and provides the accumulated voltage to the load intermittently according to the preset cycle. Contains ;,
The load connection control unit
A first switch that connects or disconnects the power supply unit and the load according to an on/off operation,
A first capacitor that is charged by receiving power from the power supply unit,
The voltage of the first capacitor is compared with a preset reference voltage, and when the reference voltage is exceeded, a comparison voltage having a preset low level voltage value for turning on the first switch is output, and the voltage of the first capacitor is A comparator that outputs a comparison voltage having a preset high level voltage value for turning off the first switch if it is within the reference voltage;
A first delay unit that adjusts the slope of the rising edge or falling edge of the comparison voltage and outputs it,
an inverter that inverts the voltage output from the first delay unit and outputs it;
According to the output of the inverter, when the first switch is turned on and a voltage exceeding a preset threshold voltage value is input after a preset delay time, it is turned on and the first capacitor connected to the power supply unit One end of the first switch is connected to ground to discharge the first capacitor, and when a voltage having a voltage value smaller than a preset threshold voltage value is input after a preset delay time when the first switch is turned off, the first switch is turned off. 1. Including a second switch that blocks the connection between one end of the capacitor and ground to allow the first capacitor to be charged by receiving power from the power supply unit.
Hybrid road sign bottle based on phosphorus energy harvesting. delete delete According to paragraph 1,
The first switch is
It is composed of a PMOS whose source terminal is connected to the other terminal of the power switch, whose drain terminal is connected to the load, and whose gate terminal receives the comparison voltage.
Hybrid road sign bottle based on phosphorus energy harvesting. According to paragraph 1,
The second switch is
It consists of an NMOS whose source terminal is grounded, whose drain terminal is connected to one end of the first capacitor, and whose gate terminal receives the voltage output from the inverter.
Hybrid road sign bottle based on phosphorus energy harvesting. According to paragraph 1,
The battery connection control unit
If the voltage value of the voltage resulting from dividing the output voltage of the battery is less than a preset threshold, outputting a control voltage having a preset voltage value to turn off the power switch,
The power switch is
During the off operation, the power supply unit and the load connection control unit are blocked and the power supply to the power unit is blocked.
Hybrid road sign bottle based on phosphorus energy harvesting.

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