KR20130027640A - A sun location tracking system for electric car - Google Patents

Abstract

PURPOSE: A sun location tracing system is provided to supply electricity for an electric vehicle with nonutility generation by enhancing the efficiency of sunlight generation. CONSTITUTION: A light shaft board(210) is installed to be selectively exposed at the outside of a vehicle and a light shaft board driving unit(220) controls the posture of the light shaft board. A vehicle location detecting part(120) detects the location of the vehicle and calculates the theoretical value of the location of the sun based on the detected vehicle location by a main sun location calculation part(100). A light shaft board location detecting part(300) detects the actual location of the light shaft board based on the sun. The main sun location calculation part controls the light shaft board by driving the light shaft board driving unit with the calculated theoretical value after a parking vehicle detecting sensor(140) detects whether the vehicle is parked. [Reference numerals] (100) Main sun location calculation part; (110) Input part; (120) Vehicle location detecting part; (140) Parking vehicle detecting sensor; (150) Solar light detecting sensor; (210) Light shaft board; (220) Light shaft board driving unit; (300) Light shaft board location detecting part; (310) Acceleration sensor; (320) Gyro sensor; (330) GPS receiver; (350) Location calculating part; (400) Main control part

Description

Solar location tracking system for electric vehicles {A SUN LOCATION TRACKING SYSTEM FOR ELECTRIC CAR}

The present invention relates to a solar position tracking system for an electric vehicle capable of generating photovoltaic power by accurately detecting and tracking the position of the sun.

As society develops and modernizes, development of alternative energy is becoming active due to high oil prices and depletion of fossil energy, which are caused by an increase in the consumption of fossil energy.

Among the alternative energy, great attention is focused on the field of solar energy which can be used without pollution. In particular, since photovoltaic power generation is a semiconductor element and a control part is an electronic component, there is no mechanical vibration or noise, and the life of the solar cell is longer than several decades, and the power generation system is semi-automated or automated, and operation and maintenance are possible. There is an advantage that can minimize the cost.

In addition, photovoltaic power generation has the advantage that it can be widely used for home use because small-scale power generation is possible without requiring large-scale power generation facilities.

On the other hand, since the sun moves along the orbit during the time from sunrise to sunset, when the skylight is fixed at a predetermined position for a long time, sunlight cannot be received under optimal conditions, thereby reducing the efficiency of the system.

Therefore, it is known that when a solar light receiving plate tracks along the trajectory of the sun, the solar light may be received under optimum conditions for a long time to increase the efficiency of the system. For this reason, the development of the solar position tracking device is actively made.

One example of a conventional solar tracking device includes a current measuring sensor measuring a current amount of electric power generated by receiving light from a skylight plate, and a driving unit rotating the solar panel, that is, the skylight plate at a predetermined angle along the orbit of the sun. It includes.

In the case of such a configuration, the current measurement sensor and the like may be largely caused according to the variables such as temperature, climate, season, etc., there is a problem that it is difficult to track the position of the sun normally when a failure occurs.

In addition, in the related art, the position of the sun is calculated by a program according to a date and time, and an electronic compass or an inclination sensor is mounted on the skylight to track the calculated sun position so that the skylight receives sunlight in an optimal state. Although this has been proposed, in this case, since the electronic compass plate or the tilt sensor corresponds to expensive equipment, the overall system installation cost increases and it is difficult to guarantee the normal operation of the skylight plate in the event of a failure of the electronic compass plate or the tilt sensor. have.

In addition, in the case of the electronic compass and the tilt sensor, the drive control is performed to continuously change the attitude of the skylight plate at night time from sunset to sunrise, thereby increasing energy consumption according to driving of the device.

In addition, a method of tracking the position of the sun by using a light receiving sensor is also used. In this case, if foreign matter such as dust is accumulated or accumulated on the light receiving sensor, an error occurs in the measured value, making it difficult to accurately track the sun. There was a problem.

On the other hand, in recent years, while reducing the use of fossil energy, the development and dissemination of electric vehicles have been actively conducted to improve environmental pollution. In the case of such an electric vehicle, the electric energy charged in the battery is used as a power source by using a large capacity battery. When all of the electric energy charged in the battery is used, it is troublesome to charge it in a separate charging station.

In view of this, a technology for installing a solar power generation device capable of generating electricity using solar light has been researched and developed. However, in this case, as described above, depending on the location of the electric vehicle or the date and time. Since the position of the sun is different depending on, there is a problem that it is difficult to track the position of the sun accurately to collect sunlight in the best state.

The present invention has been made in view of the above, and an object thereof is to provide a solar position tracking system for an electric vehicle that can accurately track the position of the sun by a simple configuration.

The solar position tracking system for an electric vehicle of the present invention for achieving the above object, is installed to be selectively exposed to the outside of the vehicle body, the skylight plate for generating power by mining sunlight when exposed to the outside, and the A photovoltaic device having a skylight drive unit for adjusting posture; A vehicle position detector for detecting a position of the vehicle; A main sun position calculator for calculating and calculating the sun position theoretically based on the vehicle position detected by the vehicle position detector by using a program; A light plate position detector for measuring an actual position (posture) with respect to the sun of the light plate; A parking stop sensor for detecting a parking stop of a vehicle; And controlling the skylight plate driving unit by driving the skylight plate driving unit according to a theoretical value calculated by the main sun position calculating unit when the car parking stop sensor detects the parking stop of the vehicle, and adjusts the position of the skylight plate. And a main controller configured to receive a position measurement value from the skylight position detection unit, compare the theoretical value with the theoretical value, and control to correct and adjust the position of the skylight plate by a difference between the theoretical value and the measured value. .

Here, the skylight plate position detection unit preferably includes at least one acceleration sensor installed in the skylight plate to detect the position value of the skylight plate based on the coordinate displacement according to the attitude change of the skylight plate.

In addition, the skylight plate position detector may include one or more gyro sensors installed on the skylight plate to detect a position value according to a change in posture of the skylight plate.

The light guide plate position detecting unit may include one or more acceleration sensors installed on the light guide plate to detect displacement values of the light guide plate; One or more gyro sensors installed on the skylight plate for detecting the displacement value of the skylight plate;

The apparatus may further include a solar light sensor installed on the vehicle body to detect sunlight, and the main controller may detect the sunlight outside the vehicle body only when sunlight is detected by the sunlight sensor in a stopped state. It is good to control the generator to be exposed.

In addition, the ceiling of the vehicle body is provided with an accommodating portion for accommodating the photovoltaic device to be sunk, the accommodating portion may be selectively opened and closed by an opening and closing door installed in the vehicle body.

In addition, the skylight plate driving unit is provided in the receiving portion, the rotary drive unit for rotating the rotary plate about the third axis (Z) orthogonal to each of the first axis and the second axis; And a hydraulic cylinder connected between the rotating plate and the skylight plate and installed to be adjustable in the third axis direction. The hydraulic cylinder is driven to rotate the skylight plate about the second axis direction. It is good to be able to adjust posture.

According to the solar position tracking system for an electric vehicle of the present invention, the electric vehicle theoretically calculates the position of the sun in a parked state using a program, and then drives and controls the position (posture) of the skylight based on the theoretical value. By increasing the photovoltaic efficiency, electric energy required for electric vehicles can be self-generated and supplied.

In particular, by checking the parking condition of the vehicle, and controlling the power generation operation by the photovoltaic device after checking the exposure condition of the sun, unnecessary operation can be restrained, and the power generation is maintained only at the best time and condition. This reduces costs and enables efficient operation.

In addition, by installing the skylight plate position detecting unit on the skylight plate and measuring the actual position (posture) of the skylight plate, the measured skylight plate position is compared with the theoretical value, and the actual skylight plate is positioned at the same position as the theoretical value. If there is a difference between the theoretical value and the measured value, it is possible to control the skylight plate to accurately track the sun at all times by correcting the measured value to match the theoretical value.

Therefore, there is an advantage that can improve the power generation efficiency by allowing the mining plate to always sunlight in the best state.

In particular, the acceleration sensor and the gyro sensor are used to calculate the actual position of the skylight plate more accurately, find the difference between the actual position and the theoretical position, and correct the position of the skylight plate to provide a more reliable system. have.

1 is a schematic block diagram illustrating a solar position tracking system for an electric vehicle according to an embodiment of the present invention.
2 is a schematic view showing an electric vehicle to which the solar position tracking system for an electric vehicle according to an embodiment of the present invention is applied.
3 is a partial cross-sectional view showing the main portion of FIG.
4 and 5 are views showing an operating state of the photovoltaic device in the state of FIG.
FIG. 6 is a plan view of the skylight plate illustrated in FIG. 5.
FIG. 7 is a view illustrating a state in which a light plate is moved according to the hardness of the sun in the state of FIG. 5.
FIG. 8 is a plan view of the skylight plate illustrated in FIG. 7.
9 is a flowchart illustrating the operation of the solar position tracking system for an electric vehicle according to an embodiment of the present invention.

Hereinafter, a solar position tracking system for an electric vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5, the solar position tracking system for an electric vehicle according to an embodiment of the present invention, using a photovoltaic device 200 and a program installed so as to be in and out of the main body 10 of the vehicle. Main position calculation unit 100 for calculating and calculating the position of the sun theoretically, the vehicle position detection unit 120 for detecting the position of the vehicle, the parking stop sensor 140, the solar sensor 150 and And a light plate position detection unit 300 and a main control unit 400.

An upper portion of the vehicle body 10, that is, a ceiling, may include an accommodating part 11 for accommodating the photovoltaic device 200 in a rotatable manner, and the accommodating part 11 may be provided in the opening / closing door 12. The doorway 13 is opened and closed by this. Therefore, the photovoltaic device 200 may be exposed to the outside or closed by the opening / closing operation of the opening / closing door 12.

In addition, the operation of the opening and closing door 12 is drive controlled by the main control unit 400. The opening / closing door 12 may be operated to open and close the doorway 13 by a sliding operation. Alternatively, the opening / closing door 12 may be provided such that the opening and closing operation is performed like a sun roof which is generally provided in a vehicle. This configuration of the opening and closing door 12 is not intended to limit the present invention, it should be understood that various embodiments are possible.

The solar cell apparatus 200 is installed in the accommodating part 11, and can be mounted in and out of the accommodating part 11, and includes a light mining plate 210 and a light mining plate driving unit 220.

The skylight plate 210 is for mining sunlight to generate electrical energy using sunlight, and is biaxially driven by the driving unit 220 to track the sun according to the sun position. That is, the skylight plate 210 is driven to rotate around the second axis (Y axis) according to the altitude of the sun, and the third axis (Z axis) is the rotation center according to the position (hardness) of the sun. By being driven rotationally, the mining surface of the mining plate 210 is maintained perpendicular to the sunlight to maintain the mining efficiency at the maximum state.

The light plate driving unit 220 includes a hydraulic cylinder 221, a rotation driving unit 223, and a rotating plate 224.

The rotation driving unit 223 is installed in the accommodating part 11 of the vehicle body 10 and rotates the rotating plate 224 about the third axis (Z axis), so that the skylight plate 210 is rotated. The position can be adjusted in the direction of the sun, that is, in the longitudinal direction. The rotation driving unit 223 is also controlled by the main control unit 400. The rotary drive unit 223 is composed of a motor and a reduction gear unit may be configured to transmit the driving force of the motor to the rotating plate 224 through the reduction gear unit to enable the rotating plate 224 to rotate at low speed. In addition, since a known panning drive device may be applied, a detailed description thereof will be omitted.

The rotary plate 224 is installed on the upper portion of the rotary drive unit 223, the hydraulic plate 221 is installed on the rotary plate 224. In the embodiment of the present invention, one hydraulic cylinder 221 is installed so as to drive up and down one side of the rotation center of the rotary plate 224, the hydraulic pressure based on the rotation center of the rotary plate 224 On the opposite side of the cylinder 221, a support bar 222 may be installed to support the skylight plate 110 to be tilted. The support bar 222 may be hinged to the top of the skylight plate 110, the bottom may be fixed to the rotating plate 224.

According to such a structure, by driving-controlling the hydraulic cylinder 221 so that length can be adjusted up-down, ie, in a 3rd axis direction, the light-shielding plate 210 can adjust the attitude | position of the 2nd axis Y to the rotation center. That is, when the length of the hydraulic cylinder 221 is increased in the posture of FIG. 3, the posture of the skylight plate 210 may be changed to track the sun in the posture as shown in FIG. 4. In addition, in the state of FIG. 4, the rotation driving unit 223 may be rotated based on the third axis Z to change the attitude of the light plate 210 as shown in FIG. 5.

According to the above configuration, when it is determined that the main controller 400 is in a state capable of photovoltaic power generation using sunlight, the main control unit 400 opens the opening / closing door 12 to open the photovoltaic device 200 in the vehicle body ( 10) Expose it to the outside to allow solar power generation.

The vehicle position detector 120 is provided in the vehicle body 10 to detect the position of the vehicle. The vehicle position detector 120 may detect the current position of the vehicle through satellite transmission and reception with the GPS satellites. The vehicle position information detected by the vehicle position detector 120 is transmitted to the main sun position calculator 100.

The main sun position calculation unit 100 calculates and calculates the sun position based on the measurement date, time and position of the vehicle input through the input unit 110 by using a preset sun position calculation program. Here, the sun position calculation method using the sun position calculation program is generally known and can be automatically calculated by computer programming. As described above, the main sun position calculator 100 calculates a theoretical value of the sun position based on the current position of the vehicle, and the calculated theoretical value is transmitted to the main controller 400.

Therefore, the main controller 400 is the rotary drive unit 223 and the hydraulic cylinder 221 based on the theoretical value of the solar position transmitted from the main solar position calculation unit 100 as time passes from the initial state as shown in FIG. Each drive control independently so that the skylight plate 210 accurately tracks the sun position.

Subsequently, the drive unit 220 is operated by the main controller 400 to correct the posture of the light plate 210 according to the actual position (posture) value of the light plate 210 detected by the light plate position detector 300. Drive control.

The light plate position detection unit 300 is for measuring the position (posture) of the light plate 210 according to the actual position of the light plate 210, that is, the position of the sun. The skylight plate position detector 300 includes at least one acceleration sensor 310, at least one gyro sensor 320, and a position calculator 350.

The acceleration sensor 310 is provided with at least one is installed in the skylight plate 210. The acceleration sensor 310 may include, for example, a three-axis acceleration sensor, and detects the displacement coordinate values (X, Y, Z displacement coordinate values) at the position change and the posture change of the skylight plate 210. Transfer to the calculation unit 350.

In addition, the gyro sensor 320 is provided with one or more is installed in the skylight plate 210. The gyro sensor 320 measures a displacement value in each of the X, Y, and Z axes during the position change and the posture change of the light plate 210 and transmits the displacement value to the position calculator 350.

In the position calculation unit 350, based on the coordinate values (displacement values) detected by each of the acceleration sensor 310 and the gyro sensor 320, the actual position of the skylight plate 210, that is, the sun position, is referred to. It will calculate the altitude and hardness.

First, when the skylight plate 210 is rotated about the Y axis in the state of FIG. 3, the posture is changed to the state of FIG. 4. At this time, the position calculation unit 350 obtains the altitude value θ2 taken by the skylight plate 210 using the coordinate values (displacement values) obtained from the acceleration sensor 310 and the gyro sensor 320. .

Here, θ1 may be obtained instead of the angle θ2 as the altitude value. The altitude value θ2 is calculated through the initial position coordinate values X, Y, and Z of the acceleration sensor 310 and the gyro sensor 320, and the displacement position coordinate values X ', Y', and Z '. Can be calculated. Since the altitude value θ2 changes in response to a rotation angle around the second axis Y of the skylight plate 210, a position (posture) relative to the sun of the skylight plate 210 may be calculated. have.

In addition, in the state of FIG. 4, when the rotation driving unit 223 rotates the rotating plate 224 about the Z axis according to the control signal of the main control unit 400 to track the direction of the sun (in this case, it is calculated by the main solar position calculation unit). Operation according to the theoretical tracking value), the acceleration sensor 310 and the gyro sensor 320 according to the angle of rotation of the skylight plate 210 in the state of FIG. 4 and FIG. Direction value θ3 is changed, and the changed direction value θ3 is obtained by obtaining displacement coordinate values X ', Y', and Z 'at the displacement positions of the acceleration sensor 310 and the gyro sensor 320. Can be calculated. That is, assuming that the state of FIGS. 4 and 6 is an initial state, when the direction value 'θ3 = 0' in the initial state, the direction value 'θ3 = measured value' in the states of FIGS. 7 and 8.

By installing the acceleration sensor 310 and the gyro sensor 320 in the skylight plate 210 as described above, the position and posture of the actual skylight plate 210 can be calculated through the position calculation unit 350.

In addition, the light plate position detector 300 may further include a GPS receiver 330. The GPS receiver 330 may acquire a coordinate value of a location installed through a GPS satellite and wireless communication, and may acquire a position change, that is, a posture change value, of the skylight plate 210, based on the obtained coordinate value. Thus, the position calculation unit 350 may be utilized to obtain the actual position change value of the light plate 210. The GPS receiver 330 may be used as an auxiliary addition, and basically measures the actual position (posture) of the light plate 210 through the acceleration sensor 310 and the gyro sensor 320.

In addition, the actual position information (measurement value) of the skylight plate 210 calculated by the position calculator 350 is transmitted to the main controller 400.

The main controller 400 is initially based on the solar position value (theoretical value) calculated by the main solar position calculation unit 100 so that the mining plate 210 tracks the sun in an optimal state 220. Drive control to adjust the position of the skylight plate 210, that is, the position according to the sun position according to the position, date and time of the vehicle.

In addition, the main controller 400 compares the measured value of the actual position (posture) of the skylight plate 210 calculated and transmitted by the position calculator 350 with the theoretical value calculated by the main solar position calculator 100. do. When there is a difference between the measured value and the theoretical value as a result of the comparison, the position (posture) of the light plate 210 is corrected by controlling the driving unit 220 so that the measured value matches the theoretical value.

Therefore, the skylight plate 210 can always track the position of the sun accurately, so that the sunlight can be mined in the best state, even if the drive unit 220 malfunctions or a driving error occurs, In 300), a difference value due to such a malfunction or driving error can be detected and corrected.

In addition, when the difference between the measured value and the theoretical value detected by the light plate position detection unit 300 is excessive, that is, when the difference is more than the reference ratio (10%) or more, the main controller 400 of the driving unit 220 Determining a failure and allowing follow-up to be taken. That is, when the main control unit 400 is determined to be the failure of the driving unit 220, the manager or management by transmitting the failure occurrence information of the driving unit to the terminal of the administrator or the management server of the management center through the transmission unit not shown, The center will be aware of this and will be able to repair or replace the fault.

Here, the main controller 400 is to correct the position of the skylight plate 210 on the basis of the result of detecting the actual position of the skylight plate 210 during solar power generation in the vehicle parking state.

The stop sensor 140 is installed in the vehicle body 10 to detect a parking or stop state of the vehicle. The parking sensor 140 may include a parking brake operation sensor generally employed in automobiles, and may include an engine driving sensor that detects the parking state of the vehicle even when the vehicle engine is stopped. have. In addition, various types of detection sensors capable of detecting a parking state of the vehicle may be applied.

The solar sensor 150 is installed in the vehicle body 10 and detects sunlight, that is, visible light, to determine whether the sun is exposed or whether the sun is covered by clouds or buildings. The result detected by the solar sensor 150 is transmitted to the main controller 400. Therefore, even if the vehicle is in a parked state and the time zone between sunrise and sunset, the main control unit 400 does not detect sunlight or detects the solar power below the reference amount. It is determined that the environment is not suitable to the following does not proceed with the photovoltaic power generation operation using the photovoltaic device 200. That is, when the vehicle is parked in an underground parking lot, or is parked in a shade where the sun is obscured by a building or the like, or when the weather is cloudy and the sun is not exposed, the solar power generator 200 may be connected to the vehicle body 10. This is because exposing to outside is meaningless.

As described above, in the case of the solar position tracking system for an electric vehicle according to the embodiment of the present invention, it is possible to control to generate photovoltaic power generation in the stopped state of the vehicle.

Hereinafter, the operation of the solar position tracking system for an electric vehicle according to an embodiment of the present invention having the above configuration will be described in detail. That is, the operation in the parking state of the vehicle will be described in detail with reference to FIGS. 1 to 9.

First, the electric vehicle is driven (S10), the vehicle stop sensor 140 in the driving state to detect whether the vehicle is stopped (S11).

When it is confirmed in step S11 that the vehicle is in the stopped state, the main controller 400 checks whether sunlight is detected by the solar sensor 150 (S12).

When it is confirmed that the sunlight is detected in the step (S12), the main control unit 400 moves and opens the opening and closing door 12 as shown in Figure 3 to open the photovoltaic device 200, that is, the skylight plate 210. Exposed to the vehicle (S13).

In addition, the vehicle position detector 120 detects the current position of the vehicle through communication with the GPS satellite and transmits the current position of the vehicle to the main sun position calculator 100 (S14).

The main solar position calculation unit 100 calculates a theoretical value of the solar position based on the vehicle, that is, the skylight plate 210, based on the received vehicle position value (S15).

The theoretical value calculated by the main solar position calculation unit 100 is transmitted to the main control unit 400, and the main control unit 400 adjusts the position of the skylight plate 210 to track the sun based on the received theoretical value. (S16).

Then, in the state in which the light plate 210 is adjusted, the light plate position detector 300 detects (measures) an actual position value of the light plate 210 (S17).

In addition, the actual position value, that is, the measured value of the skylight plate 210 detected by the skylight position detection unit 300 is transmitted to the main controller 400, and the main controller 400 matches the theoretical value with the measured value. The comparison is judged (S18).

When the theoretical value and the measured value do not coincide with the comparison result in step S18, the main controller 400 controls the driving unit 220 so that the actual position of the light plate 210 is equal to the theoretical value. , The position is corrected to have a posture corresponding to the theoretical value (S19). Thus, by correcting the position of the light plate 210 to match the theoretical value, even if a failure or malfunction of the drive unit 220, a drive error of the drive unit 220 occurs, the light plate 210 always tracks the sun accurately. Can be controlled.

In addition, since the installation position information and the date and time information of the skylight plate 210 can be known, an accurate time from the sunrise time to the sunset time is ensured, thereby driving the time of the skylight plate 210 and the driving unit 220. By controlling in a limited way, the control of the driving unit 220 and the skylight plate 210 is stopped from the sunset time to the sunrise time, and thus the management cost and the maintenance cost can be reduced.

In addition, as described above, the actual position (posture) of the skylight plate 210 can be detected by using the skylight plate position detector 300 installed in the skylight plate 210, thereby mutually measuring the measured value and the theoretical value. By comparison, it is possible to determine whether or not the actual skylight plate 210 is position-controlled according to a control signal, and if there is a difference, the skylight plate 210 can be controlled to accurately track the sun at all times. There is an advantage that can maximize the power production efficiency used.

In addition, by exposing the photovoltaic device 200 to the outside of the vehicle only in an environment where the vehicle is parked and at the same time sunlight is detected, unnecessary operation may be prevented in actual cloudy weather, shade, and inside the building. have.

While the invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Those skilled in the art will readily appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

10. Car body 11. Accommodating part
12. Opening / closing door 13. Entrance
100. Main solar position calculation unit 110. Input unit
120. Vehicle position detector 140. Parking sensor
150. Solar sensor 210. Skylight plate
220. Driving unit 300. Mining plate position detection unit
310..Acceleration sensor 320..Gyro sensor
350. Position calculation unit 400 Main control unit

Claims (7)

A photovoltaic power generation device that is installed to be selectively exposed to the outside of the vehicle body, and has a skylight plate for generating power by mining sunlight when exposed to the outside, and a skylight plate driving unit for adjusting the attitude of the skylight plate;
A vehicle position detector for detecting a position of the vehicle;
A main sun position calculator for calculating and calculating the sun position theoretically based on the vehicle position detected by the vehicle position detector by using a program;
A light plate position detector for measuring an actual position (posture) with respect to the sun of the light plate;
A parking stop sensor for detecting a parking stop of a vehicle; And
When the parking stop detection sensor detects the parking stop of the vehicle, the light guide plate driving unit is controlled by the theoretical value calculated by the main solar position calculation unit to adjust the position of the light guide plate, and the position of the adjusted light guide plate. And a main controller configured to receive a measurement value from the skylight plate position detecting unit, compare the measured value with the theoretical value, and adjust and adjust the position of the skylight plate by a difference between the theoretical value and the measured value. Automotive position tracking system. The method of claim 1, wherein the light plate position detection unit,
And at least one acceleration sensor installed at the skylight plate to detect a position value of the skylight plate based on a coordinate displacement caused by a change in attitude of the skylight plate. The method of claim 1, wherein the light plate position detection unit,
And at least one gyro sensor installed on the skylight plate to detect a position value according to a change in posture of the skylight plate. The method of claim 1, wherein the light plate position detection unit,
At least one acceleration sensor mounted to the skylight plate to detect displacement values of the skylight plate;
And at least one gyro sensor installed on the skylight plate to detect displacement values of the skylight plate. 5. The method according to any one of claims 1 to 4,
Installed on the vehicle body further comprises a solar sensor for sensing the sun,
The main control unit is a solar position tracking system for an electric vehicle, characterized in that the control unit so that the photovoltaic device is exposed to the outside of the vehicle body only when the solar sensor detects sunlight in a stopped state. The method of claim 5,
The ceiling of the vehicle body is provided with a receiving portion for accommodating the photovoltaic device in a sunkable manner, the receiving portion solar position for the electric vehicle, characterized in that the opening and closing selectively by the opening and closing door installed in the vehicle body Tracking system. According to claim 6, The light plate driving unit,
A rotation driving unit installed in the accommodation unit and rotating the rotating plate about a third axis Z orthogonal to each of the first and second axes;
And a hydraulic cylinder connected between the rotating plate and the skylight plate and installed to be adjustable in length in the third axis direction.
The position tracking system for an electric vehicle, characterized in that the hydraulic cylinder is driven to adjust the attitude by rotating the skylight plate about the second axis direction.

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