KR101053095B1 - Light emitting member control device for strut, control method thereof and road strut using same - Google Patents

Abstract

The present invention relates to a light emitting member control apparatus for a strut, a control method thereof, and a road strut using the same. After grasping the weather or current time of the area where the corresponding land is installed, and controlling the on / off operation of the light emitting module in response to this, it is possible to inform the exact road situation even in bad weather during the day as well as at night. Of course, the solar cell alone will provide sufficient power even in areas where it is difficult to supply enough power.

In particular, by constructing landowners using thin timber, which is less useful than other timbers, it contributes to increase of forest income of mountain owners by giving high added value, and to harmonize with the natural landscape of road facilities.

In addition, by using a solar cell and a wind turbine, it is possible to use semi-permanent to improve the economics, as well as to be applied to a variety of sign posts, thereby improving the applicability and competitiveness of the product.

Strut, solar cell module, turbine module, light emitting module, first switching module, second switching module

Description

Control device for luminous element and control method for the same and brace for road using the same}

The present invention relates to a light emitting member control device for a strut, a control method thereof, and a road strut using the same, and more particularly, a solar cell is installed on a strut provided with a light emitting means (light emitting module), and the electricity generated by the solar cell. By detecting the amount of energy, grasping the weather and the current time of the area where the relevant lands are installed, and controlling the on / off operation of the light emitting module in response to this, it is accurate to the driver not only at night but also in bad weather even during the daytime. It can tell the road situation.

In addition, by using the wind turbine to produce additional electrical energy, it is to ensure sufficient power supply even in areas where solar power is difficult to supply enough (years of cloudy weather year-round).

In recent years, as the spread of automobiles increases and this facilitates the movement of long distances, automobiles are indispensable in modern life.

In spite of the above convenience, as the spread of vehicles increases, traffic accidents caused by vehicles also increase, and these traffic accidents are mainly caused by driver's immature driving, drowsy driving or immature road terrain. .

Among these, traffic accidents due to uneven road terrain are mostly caused when a driver travels in an unfamiliar place and does not recognize a curved road ahead.

In order to inform the driver of such road conditions, road signs for recognizing the state and direction of the roads are installed on various roads such as city roads, national roads, and highways.

In particular, the road signs in the mountainous area to inform the driver in advance of the sharp curve of the road ahead to perform a function to promote safe operation.

As is well known, a general road sign is attached to a support plate based on a high-brightness reflective paper, and a matte black sheet indicating the state of the road is attached thereto, so that the driver of the driving vehicle recognizes it.

In addition to the above road signs, various roads are also provided with marker posts for informing the driver of road boundaries and curves.

However, despite the installation of such road signs and sign posts, there is a problem that the road signs and sign posts do not achieve their purpose at night when the driver's vision is not sufficiently secured.

In order to solve this problem, efforts have been made to achieve the original purpose of road signs and sign posts by installing light emitting means such as LEDs (Light Emitting Diodes) and lighting them at night.

In particular, in order to solve the hassle caused by turning off the light emitting means installed on the shore, the manager has been developed a method to automatically turn on / off the light emitting means.

However, in case of bad weather such as rainy weather or heavy weather, the light emitting means should be turned on despite being low. However, since the light emitting means is turned off by the operation of the set timer, the desired purpose cannot be achieved. there was.

In addition, in areas with many cloudy days throughout the year, since the amount of electrical energy supplied from the solar cells is not sufficient, the light emitting means has often failed to operate normally.

In order to solve the above problems, the present invention is to install a solar cell in the support is installed light emitting means (light emitting module), and detect the amount of electrical energy generated by the solar cell, After grasping the current time and the like, by controlling the on / off operation of the light emitting module, the light emitting module is turned on even in bad weather not only at night, but also during the day, thereby improving visibility and accurately driving road conditions. It is an object of the present invention to provide a light emitting member control apparatus for a prop, a control method thereof, and a road prop using the same.

In particular, in the construction of the struts, the light emitting member control device for the struts and its control method, and the road struts using the same, which can be harmonized with the natural landscape by replacing with an eco-friendly wood thinning ash.

In addition, the present invention is to store and use the electrical energy produced from the solar cell in the storage battery which is a secondary battery, so that the product can be used semi-permanently with only one installation.

In addition, the present invention by producing additional electrical energy by using a wind turbine, the light emitting member for holding that can achieve a sufficient power supply even in a region where it is difficult to supply sufficient power with a solar cell (regions with a cloudy day of the year) It is to provide a control device, a control method thereof, and a road strut using the same.

In order to achieve the above object, the light emitting member control apparatus for holding according to the present invention, the solar cell module for converting the incident solar light into electrical energy, the electrical storage module for charging and discharging electrical energy, and the solar cell A charging module that receives the converted electric energy from the module and charges the power storage module, a light emitting module that emits light by receiving the electric energy charged in the power storage module, and is electrically connected between the power storage module and the light emitting module The amount of electrical energy converted by the first switching module and the solar cell module, the first switching module operable to convert the electrical connection relationship between the power storage module and the light emitting module into one of an on state and an off state. The first switching module is warmed when the measured value of the measured electric energy is smaller than the first set value (the minimum chargeable value by the solar cell). And a control module to convert the first switching module to an off state when the measured value is greater than the first set value.

In addition, the method for controlling a light emitting member for holding according to the present invention, a) checking the amount of power supplied from the solar cell; b) comparing the checked power supply amount of the solar cell with a first set value (minimum chargeable value by the solar cell); And c) when the amount of power supplied to the solar cell is greater than the first set value, determining the current state as a daytime on a clear day, charging the storage battery with electric energy supplied from the solar cell, and supplying the amount of power to the solar cell. When the value is smaller than the first setting value, the current state is determined as one of night time, cloudy day, and bad weather, and the step of supplying the electric energy charged in the battery to the light emitting device is characterized in that it comprises.

In addition, the road strut provided with the light emitting member control apparatus according to the present invention is formed by coupling a connecting pipe 920 having a screw thread to one side inside the hollow interlayer timber 910 from which the internal pith is removed. As the upper portion of any one of the connection member 900, the solar cell 110 and the light emitting device 810 is coupled to the solar cell module 100 'is fixedly installed, the upper portion of the solar cell module 100' In addition, the turbine module 200 'is installed to be coupled to be spaced apart by a predetermined distance from the other connecting member 900, and the inside of at least one of the solar cell module 100' and the turbine module 200 ', The charging module 300 receives electrical energy from at least one of the battery module 100 'and the turbine module 200', and the charging operation of charging the electrical energy by the charging module 300 and the light emitting device 810. And a power storage module 400 for performing a discharging operation of supplying electrical energy to The control module 500 for controlling the charging operation and the discharge operation of the power storage module 400 is characterized in that it is installed so as to be electrically connected to the solar cell module 100 'and the turbine module 200'.

By means of the above solution, the present invention accurately corresponds to the weather (sunny day and cloudy day and bad weather, etc.) and the current time (day and night) of the area in which the support post is installed, the on / off operation of the light emitting module By controlling, there is an advantage that can improve visibility to always inform the driver of the correct road situation.

In particular, by charging the power storage module (battery battery) by using the wind frequently generated in a cloudy day or bad weather, it is possible to store sufficient power to operate the light emitting module, thereby improving the driver's reliability of the product. It can be effective.

Moreover, by constructing landlords using thin timber, which is less useful than other timbers, it contributes to the increase of forest income of mountain owners by giving high added value, as well as to harmonize with the natural landscape of road facilities.

In addition, by storing and using the electric energy produced from solar cells and wind turbines in the storage battery, which is a secondary battery, the product can be used semi-permanently with only one installation to improve economic efficiency, and it is difficult to supply sufficient power with solar cells only. It is possible to improve the reliability of the product by providing sufficient power supply even in areas with cloudy weather year-round.

In addition, since the props according to the present invention can be easily applied to props of traffic safety signs, props for bicycle road guide signs, props of bicycle safety signs, props of safety signs, props of reflectors, etc. It can be applied to the night landscape lighting such as watersides and gardens where safety accidents occur, or the night landscape lighting of outdoor gardens, golf courses, amusement facilities, shopping malls, etc. And it is effective to improve the competitiveness.

An example of a light emitting member control apparatus for a strut and a control method thereof and a road strut using the same may be applied in various ways. Hereinafter, the most preferred embodiment will be described with reference to the accompanying drawings.

As shown in FIG. 1, the light emitting member control apparatus according to the present invention includes a solar cell module 100, a turbine module 200, a charging module 300, a power storage module 400, and a control module 500. It comprises a first switching module 600, the second switching module 700, the light emitting module (800).

The solar cell module 100 converts sunlight into electrical energy and includes a cell such as the solar cell 110 shown in FIG. 3.

The turbine module 200 converts wind into electric energy and includes a wind turbine 210 and the like shown in FIG. 3.

Here, the internal circuits and configurations of the solar cell module 100 and the turbine module 200 may be variously modified by those skilled in the art according to the type of the solar cell 110 and the wind turbine 210, and are not limited thereto. Of course.

The charging module 300 is for converting the electrical energy supplied from the solar cell module 100 and the turbine module 200 to the voltage and current level required by the power storage module 400, the excessive voltage and current is stored It is configured to include an overcurrent and overvoltage prevention circuit for preventing supply to the module 400.

The power storage module 400 is configured as a secondary battery for charging electrical energy (hereinafter, mixed with power) and supplying the charged electrical energy to the light emitting module 800 as necessary.

The control module 500 measures (detects) the amount of electrical energy supplied from the solar cell module 100 and the turbine module 200, and operates and charges the first charging module 300 based on the measurement result. , 2 is to control the on-off operation of the switching module (600) (700).

The first switching module 600 is electrically connected between the power storage module 400 and the light emitting module 800 to turn on or off the electrical connection relationship between the power storage module 400 and the light emitting module 800. To convert to state.

The second switching module 700 is electrically connected between the turbine module 200 and the light emitting module 800 to turn on or off the electrical connection relationship between the turbine module 200 and the light emitting module 800. To convert to state.

As illustrated in FIG. 3, the light emitting module 800 includes light emitting devices such as LEDs (Light Emitting Diodes), and organic light emitting diodes (OLEDs) may be applied according to the requirements of those skilled in the art.

Hereinafter, with reference to Figure 2 will be described the operation of the light emitting member control apparatus for holding according to the present invention configured as described above.

First, the control module 500 continuously checks the amount (power supply amount) of electric energy supplied from the solar cell module 100 (S101).

If the electrical energy supplied from the solar cell module 100 is sufficient, it is determined that the area where the corresponding land is installed is the present day on a clear day, and if the electric energy supplied is not sufficient, the area where the corresponding land is installed is present, It is judged that it is night time, cloudy day or bad weather.

Therefore, the control module 500 compares the identified amount of electrical energy with the first set value (S102). Here, the first set value refers to the minimum chargeable value that can be charged by the power storage module 400 by the solar cell 110, it is preferable to set according to the intensity of sunlight incident in the morning or evening.

As a result of the comparison, when the amount of electric energy (supply power amount) supplied from the solar cell module 100 is greater than the first set value, the control module 500 determines that the current weather is clear during the day, and emits light. The first switching module 600 and the second switching module 700 are converted to the off state so that the module 800 is turned off (S104).

As described above, when the first switching module 600 is turned off, the electrical energy supplied from the solar cell module 100 is charged in the power storage module 400, and the power storage module 400 is charged only. .

At this time, when wind is generated in the region, it is natural that the power storage module 400 is also charged by the electric energy supplied from the turbine module 200.

On the other hand, in the case of a clear night time, that is, when the electrical energy supplied from the solar cell module 100 is smaller than the first set value, the control module 500 determines that the present time is the night time, the turbine module 200 In step S106, the amount of the electric energy supplied from the power source (power supply amount) is checked (S106), and the checked electric energy is compared with the second set value (S107). Here, the second set value refers to a minimum chargeable value capable of charging the power storage module 400 with electrical energy supplied by the turbine module 200.

If the amount of electrical energy supplied by the turbine module 200 is smaller than the second set value (S108), the control module 500 determines that the present day is a clear day and a night time, and the first switching module 600 ) Is turned on (S109), and the electrical energy charged in the power storage module 400 is supplied to the light emitting module 800 (S110).

At this time, the control module 500 is the charging module (so that the electrical connection state of the solar cell module 100 and the power storage module 400 and the electrical connection state of the turbine module 200 and the power storage module 400 to the off state ( By controlling the 300, the electrical energy of the power storage module 400 is preferably prevented from being reversed and supplied to the solar cell module 100 and the turbine module 200 in a low voltage state.

If the amount of electrical energy supplied by the turbine module 200 is greater than the second set value (S108), the control module 500 determines that the current state is cloudy or bad weather, and the first switching module By converting the 600 to the off state (S111), and without consuming the electrical energy charged in the power storage module 400, by converting the second switching module 700 to the on state (S111), the turbine module 200 The electrical energy supplied from the supply to the light emitting module 800 (S112).

Therefore, it is possible to prevent the electrical energy charged in the power storage module 400 from being consumed due to cloudy days or bad weather.

Hereinafter, with reference to Figure 3 will be described with respect to the road strut is applied to the light emitting member control apparatus described above, in the description of the road strut according to the present invention, the charging module 300, power storage shown in FIG. The module 400, the control module 500, the first switching module 600, the second switching module 700, etc. are installed in the prop so as to be electrically connected, and installed in various ways and configurations according to the needs of those skilled in the art. Naturally, the description is not limited to the specific one.

As shown in FIG. 3, the road strut according to the present invention is provided with at least one connection member 900, a solar cell module 100 ′ and a turbine module 200 ′ connected thereto, and the connection member 900. And the outer shape of the solar cell module 100 'and turbine module 200' is preferably cylindrical, but is not limited thereto.

The connecting member 900 is configured by combining a connecting pipe 920 formed with a screw thread on one side, inside the hollow interlayer timber 910 from which the internal pith is removed, as shown in the lower side of FIG. 3. The lower portion of the connection member 900 is buried in the ground, the connection member 900 shown in the upper side is formed on the other side (lower) of the thread line corresponding to the thread formed on the one side (upper).

The solar cell module 100 ′ is fixed to the solar cell 110 at a portion (unsigned) removed to have an inclination corresponding to the annual average altitude of the sun in the region where the corresponding pillar is installed, Screw lines (not shown) corresponding to the screw lines formed on the upper and lower portions of the connecting member 900 are formed.

In addition, at least one light emitting device 810 may be further configured in the removed portion of the solar cell module 100 ′.

At this time, the solar cell module 100 'is preferably installed at a position spaced about 60 cm from the ground so as not to interfere with the driving of the driver.

On the other hand, since the turbine module 200 ', the kinetic energy of the air by the wind to be converted into electrical energy, it is preferable to install so as to have a sufficient height, for this purpose as shown in Figure 3 the solar cell module 100 ') And the connecting member 900 is also connected between the turbine module 200'.

The turbine module 200 ′ installed as described above is configured by fixing the wind turbine 210 inside the through-hole 220 formed in a predetermined direction, and air caused by wind passes through the through-hole 220. When the wind turbine 210 is rotated to produce electrical energy.

At this time, the through-hole 220 is formed by the turbine module 200 'by forming a wider to the inlet side to the wind inflow, as shown in Figure 4, by allowing the air flowing at a low speed to move and discharge at a high speed It is possible to increase the amount of electrical energy.

Here, the reference numeral '211' shown in FIG. 4 is a wind turbine 210 is installed, a printed circuit board (PCB) formed with a conductor for supplying the electrical energy produced in the wind turbine 210 to the charging module 300 ), And a protective synthetic resin may be applied to prevent the wire from being exposed to the outside.

In addition, the upper end of the turbine module 200 ', the cap (top) closing member 950 in the form of coupling is installed to improve the appearance aesthetics, as well as from the external shock applied to the support in the upper direction turbine Protect module 200 '.

At this time, by attaching a high-brightness reflective paper to the side of the upper finishing member 950, it is possible for the driver to drive the vehicle to provide improved visibility.

Meanwhile, as shown in FIG. 3, when the solar cell 110 and the light emitting device 810 are directly exposed to the outside, the solar cell 110 and the light emitting device 810 may be damaged or damaged due to the rain or the impact applied from the outside.

Accordingly, as shown in FIGS. 5A and 5B, the refractive protective cover 101 is installed where the solar cell 110 and the light emitting device 810 are installed.

In this case, the refractive protective cover 101, as shown in Figure 5a has a refractive index to be refracted toward the solar cell 110, the sunlight incident at different altitudes (A1, A2, A3, etc.) for each season. At the same time, as shown in FIG. 5B, the light emitted from the light emitting element 810 is refracted downward so as to have a refractive index such that the light is emitted (L1, L2, etc.).

The material, thickness, eccentricity of the curved surface, etc. of the refractive protective cover 101 for satisfying the refractive index as described above may be variously applied by the person skilled in the art according to Snell's law.

Here, the outside of the solar cell module 100 'and the turbine module 200' is preferably composed of a hollow interlayer cylindrical wood, such as a connecting member 900.

On the other hand, the shore shown in Figure 3 can be applied to the case where the direction of sunlight (in south) and the direction in which the vehicle enters the same or similar (when driving toward the shore from the south), the direction in which sunlight is incident When the direction in which the vehicle enters is different from that shown in FIG. 6, the strut according to the present invention can be configured.

In other words, the solar cell module 100 'in which the solar cell is installed and the light emitting module 800' in which the light emitting element is installed are respectively configured, and the solar cell module 100 'and the light emitting module 800' are rotatable with each other. Install them together.

As described above, when the solar cell module 100 'and the light emitting module 800' are installed to be rotatable, the light emitting module 800 'is rotated and installed to correspond to the entrance direction of the vehicle. It is possible to apply and install.

In the above, the light emitting member control apparatus for a strut, the control method thereof, and the road strut using the same have been described. Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

1 is a configuration diagram showing an example of a light emitting member control device for a strut according to the present invention.

Figure 2 is a flow chart showing an example of a method for controlling the light emitting member for holding according to the present invention.

3 is a configuration diagram showing an example of a road strut provided with the light emitting member control apparatus according to the present invention.

4 is a schematic view showing an installation configuration of the turbine module of FIG.

5A is a view illustrating absorption of the solar cell module shown in FIG. 3.

5B is a view illustrating light emission of the light emitting module shown in FIG. 3.

6 is a configuration diagram showing another example of the road posts provided with the light emitting member control apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: solar cell module 200: turbine module

300: charging module 400: power storage module

500: control module 600: first switching module

700: second switching module 800: light emitting module

900: connecting member 910: hollow interlayer timber

920: connector 950: upper closing member

Claims (21)

Solar cell module for converting incident sunlight into electrical energy, A power storage module for charging and discharging electrical energy; A charging module for charging the power storage module by receiving the electric energy converted from the solar cell module; A light emitting module emitting light by receiving electric energy charged in the power storage module; A first switching module electrically connected between the power storage module and the light emitting module, the first switching module operable to convert an electrical connection relationship between the power storage module and the light emitting module into one of an on state and an off state; , The amount of electrical energy converted by the solar cell module is measured, and when the measured value of the measured electrical energy is smaller than a first set value (minimum chargeable value by the solar cell), the first switching module is turned on. When the measured value is larger than the first set value, the first switching module is turned off, and when the first switching module is turned on, the electrical connection state between the solar cell module and the power storage module is changed. A control module for controlling the charging module to be in an off state; It includes a turbine module for converting energy from wind into electrical energy, The charging module is characterized in that for receiving the electrical energy converted from the turbine module to charge the power storage module, A second switching module electrically connected between the turbine module and the light emitting module, the second switching module being operable to convert an electrical connection relationship between the turbine module and the light emitting module into one of an on state and an off state; The control module, when the measured value of the electrical energy converted in the solar cell module is less than the first set value, measures the amount of electrical energy converted in the turbine module, and the measured value of the measured electrical energy is And a setting value (minimum chargeable value by the turbine), the first switching module is turned off and the second switching module is turned on. delete delete delete The method of claim 1, The control module, When the measured value of the electric energy converted in the solar cell module is less than the first set value, and the measured value of the electric energy converted in the turbine module is less than the second set value, the first switching module is turned on. Light emitting member control device for a post, characterized in that for switching the second switching module to the off state. The method of claim 5, The control module, When the first switching module is turned on, and the second switching module is turned off, the holding light emitting member for controlling the charging module to turn off the electrical connection between the turbine module and the power storage module. controller. a) checking the amount of power supplied from the solar cell; b) comparing the checked power supply amount of the solar cell with a first set value (minimum chargeable value by the solar cell); And c) When the amount of power supplied to the solar cell is greater than the first set value, the current state is determined as a daytime on a clear day, and the battery is charged with electric energy supplied from the solar cell, and the amount of power supplied to the solar cell is reduced. 1 is smaller than the set value, the current state is determined by any one of the night time, cloudy days, bad weather and the step of supplying the electric energy charged in the battery to the light emitting device, Step c) is c-1) when the amount of power supplied to the solar cell is smaller than the first set value, converting the electrical connection state between the solar cell and the battery into an off state when the electrical energy charged in the battery is supplied to the light emitting device. More, After step c), d) checking the amount of power supplied from the turbine; e) comparing the confirmed power supply amount of the turbine with a second set value (minimum chargeable value by the turbine); And f) supplying electrical energy supplied from the turbine to the light emitting device when the amount of power supplied to the solar cell is smaller than the first set value and the amount of power supplied to the turbine is greater than the second set value. Light emitting member control method for holding. delete delete The method of claim 7, wherein Step f), f-1) when the supply power amount of the solar cell is smaller than the first set value and the supply power amount of the turbine is smaller than the second set value, further comprising supplying electric energy charged in the storage battery to the light emitting device. Light emitting member control method for holding. The method of claim 10, Step f), f-2) if the supply power amount of the solar cell is greater than the first set value, and the supply power amount of the turbine is greater than the second set value, further comprising the step of charging the storage battery with electrical energy supplied from the turbine Light emitting member control method for holding. The method of claim 11, Step f), f-3) When the amount of power supplied to the solar cell is smaller than the first set value and the amount of power supplied to the turbine is smaller than the second set value, when the electric energy charged in the battery is supplied to the light emitting device, The control method of the light emitting member for holding, characterized in that further comprising the step of converting the electrical connection state to the off state. Inside the hollow thin timber lumber 910 from which the internal pith is removed, the coupling member 920 formed by coupling a screw tube formed on one side to an upper portion of the connecting member 900. The solar cell 110 and the light emitting device 810 is coupled to install a solar cell module 100 'fixedly installed, On the upper portion of the solar cell module 100 ', the turbine module 200' is coupled and installed to be spaced apart by a certain distance by another connection member 900, In at least one of the solar cell module 100 'and the turbine module 200', the charging module 300 receives electrical energy from at least one of the solar cell module 100 'and the turbine module 200'. ), A charging operation of charging the electrical energy by the charging module 300 and a charging operation of the power storage module 400 and the power storage module 400 performing a discharge operation of supplying electrical energy to the light emitting device 810. A control module 500 for controlling an operation and a discharge operation is installed on the road post, wherein the light emitting member control device is installed so as to be electrically connected to the solar cell module 100 'and the turbine module 200'. Inside the hollow thin timber lumber 910 from which the internal pith is removed, the coupling member 920 formed by coupling a screw tube formed on one side to an upper portion of the connecting member 900. The solar cell 110 is fixedly installed in any one of the solar cell module 100 'and the light emitting module 800' is fixedly installed, the light emitting device 810 is installed in combination, one side of the solar cell module 100 ' The light emitting device 810 is installed to be rotatable, On top of the other one of the solar cell module 100 'and the light emitting module 800', the turbine module 200 'is coupled and installed to be spaced apart by a predetermined distance from the other connecting member 900, In at least one of the solar cell module 100 'and the turbine module 200', the charging module 300 receives electrical energy from at least one of the solar cell module 100 'and the turbine module 200'. ), A charging operation of charging the electrical energy by the charging module 300 and a charging operation of the power storage module 400 and the power storage module 400 performing a discharge operation of supplying electrical energy to the light emitting device 810. A control module 500 for controlling an operation and a discharge operation is installed on the road post, wherein the light emitting member control device is installed so as to be electrically connected to the solar cell module 100 'and the turbine module 200'. 15. The method of claim 14, The light emitting module 800 'is provided with a light emitting member control device, characterized in that the refractive protection cover 101 having a refractive index to allow the light emitted from the light emitting element 810 to be refracted downward. delete delete delete delete delete delete

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