KR20160075037A - Vehicle guidance system using power charging voltage potential - Google Patents

Abstract

The present invention includes: a feeding module placed in a direction of a route of a transfer unit to generate a magnetic field; multiple current collecting sensors placed in the transfer unit to convert the magnetic field, generated from the feeding module, into an electric field; and a steering device controlling the transfer unit to prevent the transfer unit from departing from the route by measuring a potential difference between the current collecting sensors. According to the present invention, power is able to be supplied to an electric transfer unit, and the transfer unit is controlled to be prevented from departing from a route.

Description

TECHNICAL FIELD [0001] The present invention relates to a vehicle guidance system using a potential difference generated during a power supply,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle guidance system, and more particularly, to a vehicle guidance system for controlling a vehicle by using a potential difference generated during power feeding in an electrically driven vehicle.

1 shows a prior art (Korean Patent Laid-Open Publication No. 2014-0006564) relating to a method and apparatus for controlling a lane of a vehicle. Referring to FIG. 1, the vehicle lane holding control method sets a reference path in advance, and compares the reference path and the traveling path. In this case, the directional angle of the vehicle applied to output the traveling route is compared with the directional angle of the vehicle applied to set the reference route, so that whether or not the lane departs from the lane is determined and controlled by changing the magnitude of the phase difference.

According to this conventional technique, since the reference route must be set in advance and the direction angle of the vehicle must be constantly compared and judged, the lane control of the vehicle is complicated and a large amount of calculation is required.

2 is a block diagram schematically showing a conventional high-power power collecting and feeding device. It is possible to transmit electric power without contact between the inductances generating the magnetic field, so that the feed module is arranged in the form of a bar (BAR) along the movement path of the transportation medium having the inductance to the current collector, have. The basic configuration includes a power supply module 110 and a common line 120 that supplies power to the power supply module 110. The power collecting unit 150 includes a battery 130 and a current collecting unit 140.

According to this conventional technique, the current collecting unit 140 is used only for converting electric power, and when the vehicle is required to be controlled for feeding, there is a problem that the user must manually operate the vehicle or a separate steering device must be provided.

An object of the present invention is to provide a vehicle guidance system capable of wirelessly supplying electric power to an electrically driven vehicle using an electromagnetic induction principle and capable of automatically controlling a vehicle using a potential difference during power supply.

According to an aspect of the present invention, there is provided a power module comprising: a power feeding module disposed in a moving path direction of a transportation means to generate a magnetic field; A plurality of current collecting sensors provided in the transportation means for converting the magnetic field generated in the power feeding module into an electric field; And a steering device for measuring a potential difference between the plurality of current collecting sensors and controlling the transportation means so that the transportation means does not deviate from the movement route.

Preferably, the current collecting sensor may comprise an MPC sensor. The current collecting sensors may be disposed on the left and right sides of the transportation means.

Preferably, the steering apparatus includes a measurement module for measuring a potential difference of the current collecting sensor; And a control module for determining a steering error by using the measured potential difference, and can control the transportation means to move to a region where the measured potential difference is small.

According to the present invention, there is an advantage that electric power can be supplied to the electrically driven transportation means and the transportation means can be controlled not to depart from the movement route.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a prior art method and apparatus for controlling a lane of a vehicle to be maintained. Fig.
Fig. 2 is a block diagram schematically showing a high-power collector and a power supply device.
3 is a view illustrating a vehicle guidance system according to an embodiment of the present invention.
4 is a view showing a charging efficiency according to the distance between the power feeding module and the pickup.
5 shows a control of the transportation means according to the embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the exemplary embodiments. Like reference numerals in the drawings denote members performing substantially the same function.

The objects and effects of the present invention can be understood or clarified naturally by the following description, and the purpose and effect of the present invention are not limited by the following description.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

3 is a view illustrating a vehicle guidance system according to an embodiment of the present invention. 3, the vehicle guidance system may include a power supply module 10, a power supply line 50, a current collecting sensor 30, and a steering device 70.

The power feeding module 10 may be disposed on the power feeding rail 5 stretched in the moving path direction of the transportation means 3. [ The power feeding module 10 is disposed inside the power feeding rail 5 and can generate a magnetic field in a direction above the ground.

The power supply line 50 can receive AC power from the outside. The power supply module 10 may be made up of one or more power supply segments. The power supply segment may include a feeder line, a capacitor, and a power supply core that form a magnetic field with an AC power source provided from the power supply line 50. The power feeding module 10 can form a magnetic field in proportion to the magnitude of the applied voltage around the wireless rechargeable power feeder line and inversely proportional to the square of the distance from the feeder line.

The power feeding segment can generate a magnetic flux in the direction above the ground of the power feeding rail 5. The feeding segment means means capable of providing charging electric power to an electric vehicle traveling on the feeding rail 5 or a current collector mounted on an electric train.

The magnetic flux generated in the power feeding module 10 can be linked to the current collecting sensor 30 to induce a voltage. The induction voltage of the current collector sensor 30 may be different depending on the voltage output from the feeder line. The magnitude of the magnetic field induced from the feeder line is inversely proportional to the square of the distance according to the following Bio-Savart's law.

은 r의 방향의 단위벡터, r은 급전선에서 떨어진 거리[m] ,

는 도선에 흐르는 전류[A]를 의미한다.Where B is the magnetic flux density, mu _ {0 is the vacuum permeability,

Is the unit vector in the direction of r, r is the distance [m] away from the feed line,

Means the current [A] flowing in the conductor.

The current collecting sensor 30 may be one or more. The current collecting sensor 30 is provided in the transportation means 3 and can convert the magnetic field generated by the power feeding module 10 into an electric field. The current collecting sensor 30 according to the present invention must be able to maximize the wireless charging efficiency and detect the relative position. In this embodiment, the current collecting sensor 30 may be composed of MPC (Magnetic Pick-up Coil) sensors 30 (a) and 30 (b). The MPC sensors 30 (a), 30 (b) can generate an induced electromotive force using the magnetic field of the electromagnet. The induced electromotive force can be generated by electromagnetic induction.

The principle of the MPC sensors 30 (a), 30 (b) is the same as that of the transformer. When the MPC sensors 30 (a) and 30 (b) are brought close to the magnetic field generated from the power supply module 10, an AC voltage of the same frequency is generated by a mutual induction action in the inner coil. The magnitude of this induced voltage is inversely proportional to the square of the distance to the feed line. The induced AC voltage is transmitted to the steering device 70, and the relative position of the vehicle 3 can be detected through amplification, filter, and A / D conversion.

One or more MPC sensors 30 (a), 30 (b) may be provided. The MPC sensors 30 (a) and 30 (b) may be disposed one on the left side 30 (a) and on the right side 30 (b) of the front bumper of the vehicle 3. The MPC sensors 30 (a), 30 (b) may be disposed one on the left side 30 (a) and the other on the right side 30 (b) of the rear bumper of the vehicle 3. The MPC sensors 30 (a) and 30 (b) are preferably arranged on the left and right sides at the same interval from the transportation means 3 so as to judge whether the transportation means 3 is out of the path.

The electrically-driven transportation means 3 can be charged in a non-contact wireless manner by the power supply module 10 and the current collecting sensor 30. [ The transportation means (3) may be an electric vehicle, a train or the like.

The steering apparatus 70 may measure the potential difference between the plurality of current collecting sensors 30 and control the transportation means so that the transportation means does not depart from the movement route. The steering apparatus 70 may include a measurement module 701 for measuring the potential difference of the current collector sensor 30 and a control module 703 for determining the steering error using the measured potential difference. The steering apparatus 70 can control the transportation means 3 to move in a section where the potential difference measured from the current collection sensor 30 is small.

The measurement module 701 may be electrically connected to the current collecting sensor 30. The measurement module 701 compares the voltages of the first current sensor 30 (a) disposed on the left side of the vehicle 3 and the second current sensor 30 (b) disposed on the right side to measure the potential difference . The measurement module 701 may include an amplifier, a filter, and an A / D converter to process the voltage of the current collecting sensor 30.

The potential difference measured according to the position of the pick-up portion during power feeding of the transportation means 3 using the two MPC sensors 30 (a) and 30 (b) as the current collecting sensor 30 is as follows.

Experiment 1: Matching of the power feeding module 10 and the pickup part

When the power feeding module 10 and the pick-up unit to be collected coincide with each other, experiments were conducted on the charging efficiency and the output signals of the MPC sensors 30 (a) and 30 (b) at this time. MPC sensors 30 (a) and 30 (b) were arranged at left and right sides of the transportation means 3 at intervals of 140 cm. The first MPC sensor 30 (a) was measured at 1.013 V and the second MPC sensor 30 (b) was measured at 1.000 V when the power feeding module 10 and the pick- The transportation means (3) was located at the center of the feed rail (3) and the charge value was measured as 82.9 kW.

Results of Experiment 1

Experimental Example  2 : In the power feeding module 10  The transportation means (3) cm Be separated  Occation

When the pick-up section that is collecting with the power supply module 10 is separated by 20 cm to the right, an experiment was performed on the charging efficiency and the output signals of the MPC sensors 30 (a) and 30 (b) at this time. MPC sensors 30 (a) and 30 (b) were arranged at left and right sides of the transportation means 3 at intervals of 140 cm.

The first MPC sensor 30 (a) was measured at 1.601 V and the second MPC sensor 30 (b) was measured at 1.137 V when the measurement result is that the pick-up unit that is collecting the power supply module 10 is 20 cm apart from the right. The transportation means (3) was located 20 cm from the center of the feed rail (3) to the right side and the charge value was measured as 78.7 kW.

Results of Experiment 2

As a result of the experiment, the case where the transportation means 3 is spaced by 20 cm from the power supply module 10 shows that the charging efficiency is reduced by about 4 to 5% as compared with the case where the transportation means 3 is located at the center of the power supply module 10 .

Experimental Example 3: In the case where the transportation means 3 is spaced 30 cm to the right in the power feeding module 10

When the pick-up section that is collecting with the power supply module 10 is separated by 30 cm to the right, an experiment was conducted on the charging efficiency and the output signals of the MPC sensors 30 (a) and 30 (b) at this time. MPC sensors 30 (a) and 30 (b) were arranged at left and right sides of the transportation means 3 at intervals of 140 cm.

As a result of the measurement, when the pick-up section to be collected with the power feeding module 10 is separated by 30 cm to the right, 1.165 V is measured for the first MPC sensor 30 (a) and 0.097 V is measured for the second MPC sensor 30 (b). The transportation means (3) was located 30 cm from the center of the feed rail (3) to the right side and the charge value was measured as 0.065 kW.

Results of Experiment 3

As a result of the experiment, when the transportation means (3) is separated from the power supply module (10) by 30 cm, the charging efficiency is close to 0%.

According to the experimental results, when the pickup 20 cm moves away from the power feeding module 10, the charging efficiency is reduced by 5% at maximum. When the pick-up is separated by 30 cm from the power feeding module 10, it is found that the electric means 3 is not charged. It can be understood that the problem of the lateral deviation of the transportation means 3 is an important factor for the charging efficiency.

4 is a view showing a charging efficiency according to the distance between the power feeding module and the pickup. Referring to FIG. 4, when the output of the power system is about 100 kW, when the vehicle is supplied with a power of more than 75 kW, the power is supplied stably to about 21 cm as shown in FIG. The charging efficiency according to the potential difference of the current collecting sensor 30 measured by the measuring module 701 according to the experimental example is shown in Table 1.

(Potential difference = first MPC sensor 30 (a) voltage-second MPC sensor 30 (b) voltage)

Spacing (cm) Charging efficiency (%) The potential difference (V) 0 82.9 0.013 10 76.9 0.435 16 79.575 0.424 20 78.7 0.464 21 79.42 0.702 23 43 0.902 30 0 1.068

Referring to Table 1, when the potential difference between the current collecting sensors 30 is more than 0 V and less than 0.7 V, the charging efficiency is excellent.

The control module 703 can determine the steering error of the transportation means 3 by using the potential difference measured by the measurement module 701. [ That is, the control module 703 can determine that the transportation means 3 is located at the center of the feed rail 5 when the measured potential difference of the current collecting sensor 30 is close to 0V. The control module 703 can determine that the transportation means 3 is separated from the feed rail 5 by about 21 cm when the measured potential difference of the current collecting sensor 30 exceeds 0.7 V. [ The control module 703 can control the transportation unit 3 to guide the measurement unit 701 to a section having a small potential difference.

5 shows a control of the transportation means according to the embodiment of the present invention. 5, when the conveying means 3 is deviated from the center of the feed rail 5, a potential difference occurs between the voltage V1 of the first MPC sensor and the voltage V2 of the second MPC sensor do. The V1 voltage and the V2 voltage can be signal processed in the measurement module 701 and measured. From the measured potential difference, the control module 703 can grasp the path error of the transportation means 3. The control module 703 can correct the detected path error so as to control the transportation means 3 to maintain the center path of the feed rail 5. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. will be. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by all changes or modifications derived from the scope of the appended claims and equivalents of the following claims.

1: Vehicle guidance system
3: Transportation
5: Feed rail
10: Feed module
30: Current collecting sensor
50: Power supply line
70: Steering device
701: Measurement module
703: Control module

Claims (4)

A feed module disposed in the direction of travel of the transportation means to generate a magnetic field;
A plurality of current collecting sensors provided in the conveying unit and converting the magnetic field generated in the power feeding module into an electric field; And
And a steering device for measuring a potential difference between the plurality of current collecting sensors and controlling the transportation means so that the transportation means does not deviate from the movement route.
The method according to claim 1,
Wherein the current collecting sensor is an MPC (Magnetic Pick-up Coil) sensor.
The method according to claim 1,
And said current collecting sensor is disposed on the left and right sides of said transportation means.
The steering apparatus according to claim 1,
A measurement module for measuring a potential difference of the current sensor; And
And a control module for determining a steering error of the transportation means using the measured potential difference,
And controls the transportation means to move to a section where the measured potential difference is small.

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