KR102138927B1 - Apparatus and method for detecting position - Google Patents

Abstract

Disclosed is a location detecting device and a method for detecting a location. In an environment of a wireless power transmission system including a pickup coil installed in a transportation means and a supply coil installed in a track, the position detection device according to an embodiment of the present invention senses a magnetic field generated by the pickup coil and uses a first voltage value. A detector for converting, a filter unit for removing the noise of the first voltage value and outputting a second voltage value, an envelope detector for detecting the envelope of the second voltage value and outputting a third voltage value, and the first 3 includes a voltage comparator that compares a voltage value with a reference voltage value and outputs a binary signal.

Description

Position detection device and method thereof{APPARATUS AND METHOD FOR DETECTING POSITION}

The present invention is to detect the position of the vehicle, and more particularly, to a position detection device for detecting the location by detecting the pickup coil installed in the vehicle.

Axle counters are widely used to detect trains. It can be installed on a track axle without bonding, and requires less cabling than a track circuit.

The axle counter is particularly useful in humid places. Track circuits are prone to failure. Axle counters are also less sensitive to hull conditions, such as rust and debris, compared to track circuits. In particular, axle counters are used in conjunction with track circuits or other sensing systems and provide reliable train detection.

1 is a view for explaining the axle counter.

1(a) shows the axle counter when there is no passage of the train wheels.

Referring to (a) of FIG. 1, the axle counter 120 may be installed on the track 110 of the train.

The axle counter 120 is composed of a transmitting coil 121 and a receiving coil 122. The coils 121 and 122 are mounted on both sides of the rail 111. When the magnetic field 123 generated by the transmitting coil 121 enters the receiving coil 122, a voltage 130 is induced.

The induced voltage 130 is decoded by the detection circuit. The generated magnetic field 123 is used as a reference signal for detecting the passage of the train wheels.

1(b) shows an axle counter for detecting train wheels.

Referring to (b) of FIG. 1, an axle counter is installed on the rail 141 to detect the wheel 161 of the train 160 when the train 160 moves along the track 140.

When the train wheel 161 is positioned between the coils 151 and 152 of the axle counter 150, the voltage 170 induced by the ferromagnetic train wheel 161 in the receiving coil 152 changes its phase to 180 degrees. .

The operation of a simple axle counter leads to reliable train detection performance.

Meanwhile, the axle counter may be used in a wireless power transfer (WPT) environment.

The wireless power transmission system is a system developed for electric transportation.

It generally consists of a supply coil installed on the track, a pickup coil installed on the train and related electronic circuits on the trackside equipment.

The magnetic field generated by the supply coil is received by the pickup coil and converted into electric power.

The use of WPT systems in railway applications has the advantage of eliminating the pantographs and cables commonly used in power supply.

As a result, the cost of maintaining and maintaining the construction of the railway system can be significantly reduced, and the aesthetics of the railway system has also been significantly improved.

However, when using an axle counter with a WPT system, the magnetic flux generated by the WPT system can interfere with the reference signal of the axle counter, especially in similar frequency ranges (21 kHz in axle counters, 10-100 kHz in WPT systems). It can cause detection errors when operating.

There is a way to avoid interference with each other by increasing the operating frequency of the WPT system, but because of the wire skin effect and the limitation of the switching frequency of the inverter, a high power WPT system capable of operating at 100 kilohertz (kHz) or higher is possible. There is no situation.

To solve this problem, several methods have been proposed to reduce magnetic flux leakage using reactive shielding.

However, since these methods are designed with a low-power WPT system, applying reactive shielding to minimize magnetic flux leakage and reduce EMI to the axle counter is costly and can reduce wireless power efficiency.

Korean Patent Publication No. 10-2014-0059653, "Train position detection device" (2014.05.16)

The present invention is to provide a location detection device and a location detection method that can avoid electrical interference by a wireless power signal.

In addition, the present invention is to provide a position detection device and a location detection method that can significantly reduce detection errors due to electrical interference.

In addition, the present invention is to provide a location detection device and a location detection method capable of detecting a vehicle of a transportation means using a magnetic field generated in a wireless power system without generating a separate reference signal.

In addition, the present invention is to provide a position detection device and a position detection method capable of detecting the position of the train by a pickup coil in the train.

In addition, the present invention is to provide a position detection device and a position detection method capable of calculating the speed of a passing train.

In one embodiment of the present invention for achieving the above object, in the environment of a wireless power transmission system including a pickup coil installed in a transportation means and a supply coil installed in a track, the magnetic field generated by the pickup coil is generated. A sensing unit that detects and converts the voltage to a first voltage value, a filter unit that removes noise of the first voltage value to output a second voltage value, and detects an envelope of the second voltage value to output a third voltage value And a voltage comparator that compares the third voltage value with a reference voltage value and outputs a binary signal.

In addition, it may further include a detection unit for detecting a position on the track of the vehicle based on the binary signal.

In addition, it may further include a detector for detecting the speed of the vehicle based on the binary signal.

Further, the sensing unit may be a coil wound in one direction on the supply coil.

Position detection device according to another embodiment of the present invention, in the environment of a wireless power transmission system including a supply coil installed on a track and a pickup coil installed on a vehicle, is installed in the form of winding the supply coil in one direction It includes a receiving unit for receiving a magnetic field generated by the pickup coil installed in the vehicle and outputting a first voltage value, and a detector for detecting a position on the track of the vehicle based on the first voltage value.

In addition, the detection unit may detect the speed of the transportation means based on the first voltage value.

The method for detecting a location according to an embodiment of the present invention detects a magnetic field generated by the pickup coil in the environment of a wireless power transmission system including a pickup coil installed in a transportation means and a supply coil installed in a track to detect a first voltage value. Converting to, outputting a second voltage value by removing noise of the first voltage value, detecting an envelope of the second voltage value, and outputting a third voltage value, and the third voltage And comparing the value with the reference voltage value to output a binary signal.

In addition, the method may further include detecting a position on the track of the vehicle based on the binary signal.

In addition, the method may further include detecting the speed of the vehicle based on the binary signal.

Position detection method according to another embodiment of the present invention, in an environment of a wireless power transmission system including a supply coil installed on a track and a pickup coil installed on a vehicle, is installed in a form in which the supply coil is wound in one direction. And receiving a magnetic field generated by the pickup coil installed in the vehicle and outputting a first voltage value, and detecting a position on the track of the vehicle based on the first voltage value.

In addition, the method may further include detecting the speed of the vehicle based on the first voltage value.

The location detection device and the location detection method according to an embodiment of the present invention can avoid electrical interference caused by a wireless power signal.

The location detection device and the location detection method according to an embodiment of the present invention can significantly reduce detection errors due to electrical interference.

The location detection device and the location detection method according to an embodiment of the present invention may detect a vehicle in a transportation means using a magnetic field generated in a wireless power system without generating a separate reference signal.

The position detection device and the position detection method according to an embodiment of the present invention may detect the position of the train by a pickup coil in the train.

The location detection device and the location detection method according to an embodiment of the present invention may calculate the speed of a passing train.

1 is a view for explaining the axle counter.
2 is a block diagram of a location detection device according to an embodiment of the present invention.
FIG. 3 is a configuration example of the location detection device illustrated in FIG. 2.
FIG. 4 is a view for explaining a detection method of the location detection device shown in FIG. 3.
5 is a circuit diagram of the position detection device shown in FIG. 3.
6 is a block diagram of a location detection device according to another embodiment of the present invention.
7 is a flowchart of a location detection method according to an embodiment of the present invention.
8 is a flowchart of a method for detecting a location according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited by the embodiments.

The terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, "comprises" and/or "comprising" refers to the components, steps, operations and/or elements mentioned above, the presence of one or more other components, steps, operations and/or elements. Or do not exclude additions.

As used herein, "example", "example", "side", "example", etc. should be construed as any aspect or design described being better or more advantageous than other aspects or designs. It is not done.

Also, the term'or' means an inclusive OR'inclusive or' rather than an exclusive OR. That is, unless stated otherwise or unclear from the context, the expression'x uses a or b'means any of the natural inclusive permutations.

Also, the singular expression (“a” or “an”) used in the specification and claims generally means “one or more” unless the context clearly indicates that it is of the singular form or unless otherwise stated. It should be interpreted as.

Further, terms such as first and second used in the specification and claims may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by those skilled in the art to which the present invention pertains. In addition, terms defined in the commonly used dictionary are not ideally or excessively interpreted unless specifically defined.

On the other hand, in the description of the present invention, when it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms used in the present specification (terminology) are terms used to properly represent an embodiment of the present invention, which may vary depending on a user, an operator's intention, or a custom in a field to which the present invention pertains. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

2 is a block diagram of a location detection device according to an embodiment of the present invention.

Referring to FIG. 2, the position detection device 200 includes a detection unit 210, a filter unit 220, an envelope detection unit 230, and a voltage comparison unit 240.

The sensing unit 210 may detect a magnetic field generated by the pickup coil in an environment of a wireless power transmission system including a pickup coil installed in a transportation means and a supply coil installed in a track and convert it into a first voltage value.

The environment of the wireless power transmission system may be an environment in which a vehicle is wirelessly powered.

Transportation means may include trains, monorails, automobiles, motorcycles, etc., which transport passengers or logistics.

The vehicle can move along the track.

For example, a car may be a road such as a highway, and a train may be a rail.

The supply coil can be installed on the track.

The pickup coil can be installed in the vehicle.

The supply coil can be a coil that transmits a wireless power signal to a vehicle.

The pickup coil may be a coil that receives a wireless power signal transmitted from the supply coil.

At this time, the wireless power signal may mean a magnetic field.

The voltage of the pickup coil may be induced by the received wireless power signal.

The pickup coil can generate an induced current by the induced voltage.

The pickup coil can generate a magnetic field by induction current.

The sensing unit 210 may receive the magnetic field generated by the pickup coil and convert it into a first voltage value.

The sensing unit 210 may be a coil wound in one direction on the supply coil.

The filter 220 may remove noise of the first voltage value and output the second voltage value.

The envelope detector 230 may detect the envelope of the second voltage value and output the third voltage value.

The voltage comparator 240 may output a binary signal by comparing the third voltage value with the reference voltage value.

The binary signal may be a binary logic signal.

The location detection device 200 according to an embodiment of the present invention may further include a detection unit (not shown).

The detector can detect the position of the vehicle on the track based on the binary signal.

The detector may detect the speed of the vehicle based on the binary signal.

FIG. 3 is a configuration example of the location detection device illustrated in FIG. 2.

Referring to FIG. 3, the location detection device 350 includes a detection unit 351 and a detection circuit unit 352.

The detection circuit unit 352 may include a filter unit 220 illustrated in FIG. 2, an envelope detection unit 230, and a voltage comparison unit 240.

The location detection device 350 may detect the location of the train 320.

The sensing unit 351 may be installed on the track 310 through which the train 320 passes.

The track may have an environment of a wireless power transfer system (WPT).

The wireless power transmission system may include a pickup coil installed at the bottom of the train 320, a supply coil 340 installed on the track 310, and other electronic circuits.

The supply coil 340 may be installed along the track 310.

The supply coil 340 may be installed in two lines inside the rail of the track 310.

The sensing unit 351 may be a coil.

The sensing unit 351 may be installed at a specific point of the supply coil 340 installed along the track.

In other words, the position detection device of the present invention can detect whether the train is located at a specific point by the detection unit 351.

The sensing unit 351 may be installed by being wound in one direction along an outer circumferential surface of one of two lines constituting the supply coil 340.

The sensing unit 351 may detect a magnetic field in the pickup coil in the train 320 when the train 320 passes.

The sensing unit 351 may convert the sensed magnetic field to a first voltage value.

The detection circuit unit 352 may receive the first voltage value from the detection unit 351 to detect the location of the train 320.

In addition, the detection circuit unit 352 may receive the first voltage value from the detection unit 351 to detect the speed of the train 320.

The location detection device 350 may include a plurality of detection units.

The plurality of sensing units may be installed at a certain unit distance along the supply coil of the track.

Each of the plurality of detection units may have an identification ID or an identification number.

The identification ID or identification number may be information for distinguishing each of the detection units.

The location detection device 350 may check the presence or absence of a train at a corresponding installation point by a plurality of detection units installed along the track.

The train control system may receive information about the presence or absence of a train from the location detection device 350 to check the location of the train.

For example, the detection units N1 to N100 of the position detecting device 350 are 1 km along a track 100 km (km) long to detect the position of a train having a speed of 200 km/h (h/h). Can be installed every (km).

The location detection device 350 may confirm that the train is located at a point of 0 km (km) by the first detection unit N1.

After 3 minutes, the location detection device 350 may confirm that the train is located at a point of 10 km (km) by the tenth detection unit N10.

After 30 minutes, the location detection device 350 may confirm that the train is located at a point of 100 km (km) by the 100th detection unit N100.

If the train is continuously detected by the 100th detection unit N100, the location detection device 350 may confirm that the train has stopped at a point of 100 km (km).

The location detection device 350 may check the presence or absence of a train at the corresponding location by the detection units N1 to N100 as described above.

The train control system may receive information on the presence or absence of such a train from the location detecting device 350 to check the location and status of the train.

FIG. 4 is a view for explaining a detection method of the location detection device shown in FIG. 3.

Referring to FIG. 4, the pickup coil 413 may be installed under the train 411.

The pickup coil 412 may be installed under the pickup coil ferrite core 412 installed at the bottom of the train 411.

The pickup coil 413 may be a ring-shaped coil.

The diameter of the pickup coil 413 may be d.

Therefore, the pickup coil 413 may be composed of a front end and a rear end.

)가 흘러 시계 방향의 자기장(416)을 형성할 수 있다.The front end of the pick-up coil 413 is the current entering the drawing (

) Flows to form a clockwise magnetic field 416.

)가 흘러 반시계 방향의 자기장(417)을 형성할 수 있다.The rear end of the pickup coil 413 is the current (

) Flows to form a magnetic field 417 in the counterclockwise direction.

The supply coil 414 may be installed along the track through which the train 411 passes.

The sensing unit 415 may be wound around and installed in the supply coil 414 in one direction.

The sensing unit 415 may have an A loop region.

The sensing unit 415 may receive the magnetic field 416 at the front end of the pickup coil 413 and the magnetic field 417 at the rear end to convert the magnetic field 417 into a first voltage value.

Accordingly, the converted first voltage values 418, 428, 438, and 448 received by the sensing unit 415 may change according to a relative position with the pickup coil 413.

)을 얻을 수 있다.The sensing unit 415 detects the magnetic fields 416 and 417, and as shown in [Equation 1], the first voltage value (

).

[Equation 1]

이고,

는 픽업 코일(413)의 앞 단에서 생성된 자기장(416)을 의미하고,

는 픽업 코일(413)의 뒷 단에서 생성된 자기장(417)일 수 있다.here,

ego,

Means a magnetic field 416 generated at the front end of the pickup coil 413,

May be a magnetic field 417 generated at the rear end of the pickup coil 413.

는 암페어 법칙(Ampere's law)에 의해 아래 [수학식 2]와 같이 표현할 수 있다.

Can be expressed as [Equation 2] below by Ampere's law.

[Equation 2]

는 진공에서의 투자율이다.here,

Is the permeability in vacuum.

루프 영역을 통과하는 자속 밀도의 변화는

이기 때문에 무시할 만하다.

The change in magnetic flux density through the loop region

Because it is, it is negligible.

는 픽업 코일(413)의 앞 단에 흐르는 전류일 수 있다.

May be a current flowing in the front end of the pickup coil 413.

는 픽업 코일(413)의 뒷 단에 흐르는 전류일 수 있다.

May be a current flowing in the rear end of the pickup coil 413.

와,

의 크기는 동일한 픽업 코일(413)을 통해 흐르기 때문에 동일 하다.

Wow,

The size of is the same because it flows through the same pickup coil 413.

는 감지부(415)와 픽업 코일(413)의 앞 단과의 사이 거리일 수 있다

May be a distance between the sensing unit 415 and the front end of the pickup coil 413.

는 감지부(415)와 픽업 코일(413)의 앞 단을 연결하는 선과 픽업 코일(415)의 앞 단과 뒷 단을 연결하는 선의 사이 각을 의미할 수 있다.

May denote an angle between a line connecting the front end of the sensing unit 415 and the pickup coil 413 and a line connecting the front end and a rear end of the pickup coil 415.

는 픽업 코일(413)의 앞 단이 감지부(415)의 바로 위에 있을 때이다.So, for example,

Is when the front end of the pickup coil 413 is directly above the sensing unit 415.

는 감지부(415)와 픽업 코일(413)의 뒷 단과의 사이 거리일 수 있다.

May be a distance between the sensing unit 415 and the rear end of the pickup coil 413.

는 감지부(415)와 픽업 코일(413)의 뒷 단을 연결하는 선과 픽업 코일(413)의 앞 단과 뒷 단을 연결하는 선의 각을 의미할 수 있다.

Denotes an angle of a line connecting the sensing unit 415 and the rear end of the pickup coil 413 and a line connecting the front end and the rear end of the pickup coil 413.

Hereinafter, the position detection method of the position detection device will be described in chronological order.

4A is a case in which the sensing unit 415 is not receiving the magnetic field of the pickup coil.

일 수 있다.The sensing unit 415 does not detect the magnetic fields 416 and 417 of the pickup coil 413, as shown in the graph of reference numeral 418.

Can be

At this time, since the winding direction of the sensing unit 415 is parallel to the direction of the magnetic field generated by the supply coil 414, the first voltage is not induced by the magnetic field of the supply coil 414.

As shown in FIG. 4(b), the train 411 may move and the front end of the pickup coil 413 may be located directly above the sensing unit 415.

이기 때문에 픽업 코일(413)의 앞 단이 생성한 자기장(416)에 의해 참조부호 428의 그래프와 처럼 제1 전압 값이 유도될 수 있다.The detector 415

Because of this, the first voltage value can be derived as shown in the graph of reference numeral 428 by the magnetic field 416 generated by the front end of the pickup coil 413.

)할 수 있다.As shown in FIG. 4(c), the train 411 moves and the center of the pickup coil 413 is positioned directly above the sensing unit 415 (

)can do.

)는 뒷 단의 전류(

)와 반대 방향으로 흐른다.At this time, the current at the front end of the pickup coil 413 (

) Is the current in the back stage (

) In the opposite direction.

될 수 있다.Therefore, the sensing unit 415 receives a magnetic field in which the magnetic field 416 of the front end and the magnetic field 417 of the rear end cancel each other, as shown in the graph of reference numeral 438.

Can be.

)할 수 있다.As shown in (d) of FIG. 4, the train 411 moves to position the rear end of the pickup coil 413 directly above the detector 415 (

)can do.

Therefore, the sensing unit 415 may receive the magnetic field 417 at the rear end to derive the first voltage value.

At this time, the first voltage value may have a phase difference of 180 degrees from the first voltage value induced by the front end of the pickup coil 413 as shown in the graph of reference numeral 448.

In this way, the first voltage value induced in the sensing unit 415 is processed by the detection circuit unit 352 illustrated in FIG. 3 to detect the location of the train.

In addition, the position detection device of the present invention can detect the position using the magnetic field generated by the pickup coil 413 without a separate reference signal.

Accordingly, the location detection device can minimize detection errors due to interference with the wireless power signal.

5 is a circuit diagram of the position detection device shown in FIG. 3.

Referring to FIG. 3, the location detection device may include a detection unit 510, a filter unit 520, an envelope detection unit 530, a voltage comparison unit 540, and a detection unit 550.

The sensing unit 510 may be an inductor L.

The filter unit 520 may be a low pass filter.

The filter unit 520 may include a first resistor R1 and a first capacitor C1.

The envelope detection unit 530 may include a diode D, a second resistor R2, and a second capacitor C2.

The voltage comparator 540 may include a voltage comparator circuit.

One end of L can be grounded.

One end of R1 may be connected to the other end of L.

The voltage value of the other end of L may be the first voltage value.

One end of C1 may be connected to one end of L.

The other end of C1 may be connected to the other end of R1.

The voltage value at the other end of C1 may be a second voltage value.

The anode end of D may be connected to the other end of R1.

One end of R2 may be connected to one end of L.

The other end of R2 may be connected to the cathode end of D.

One end of C2 may be connected to one end of L.

The other end of C2 may be connected to the cathode end of D.

The voltage value at the other end of C2 may be the third voltage value V _in .

The voltage comparator circuit may receive a third voltage value V _in and a reference voltage value V _th to output a binary signal.

The detector (Railway signaling main controller) 550 may detect the location of the train based on the binary signal.

In addition, the detector 550 may detect the speed of the train based on the binary signal.

The sensor 510 may receive a magnetic field from the pickup coil of the train and convert it to a first voltage value.

The filter unit 520 may reduce noise generated outside the operating frequency of the wireless power transmission system among the first voltage values.

)는 제1 저항(R1)의 저항 값과 제1 캐패시터(C1)의 캐패시턴스 값에 의해 조절될 수 있다.Cutoff frequency of the filter unit 520 (

) May be adjusted by the resistance value of the first resistor R1 and the capacitance value of the first capacitor C1.

)는 무선 전력 전송 시스템의 동작 주파수에 의해 정해질 수 있다.Cutoff frequency (

) May be determined by the operating frequency of the wireless power transmission system.

The capacitance value of the first capacitor C1 may be minimized to reduce a time delay between a first voltage value that is an input signal of the filter unit 520 and a second voltage value that is an output signal of the filter unit 520.

The filtered second voltage value may be input to the envelope detector 530.

The envelope detector 530 may detect the envelope and output a third voltage value.

The resistance value of the second resistor R2 and the capacitance value of the second capacitor C2 are determined such that the envelope detector 530 checks the peak value of the second voltage and outputs a third voltage value having the minimum voltage ripple. Can be.

The voltage comparator 540 may compare the third voltage value V _in and the reference voltage value V _th of the envelope detector 530 to output a binary signal.

At this time, the reference voltage value V _th may be 0 volts (V) to 5 volts (V).

The binary signal (Logic Output) may be a logic signal composed of a high signal (HIGH) and a low signal (LOW).

The voltage comparator 540 may output a binary signal as shown in [Equation 3] below.

[Equation 3]

The voltage comparator 540 may output a high signal when the third voltage value V _in is greater than the reference voltage value.

The voltage comparator 540 may output a low signal when the reference voltage value is greater than the third voltage value V _in .

The reference voltage value V _th may be set slightly lower than the peak voltage value of the first voltage value obtained when the front end and the rear end of the pickup coil are directly above the sensing unit 510.

Therefore, the position detection device of the present invention can increase the accuracy of the position detection by detecting the presence of the train only when the pickup coil passes.

In addition, the detector 550 may receive a binary signal (Logic Output) to calculate the speed of the train.

For example, the sensing unit 510 may induce a significant first voltage value when the front end or the rear end of the pickup coil is directly above, as shown in FIG. 4.

)과 감지 범위를 떠나는 시간(

)을 확인할 수 있다.The detection unit 550 receives the signal (Logic Output) time when the train enters the detection range of the detection unit 510 (

) And the time to leave the detection range (

)can confirm.

)를 확인된 시간들(

,

)에 의해 아래 [수학식 4]와 같이 계산할 수 있다.Detection unit 550 is the speed of the train (

) The confirmed times (

,

) Can be calculated as shown in [Equation 4] below.

[Equation 4]

는 도 4에 도시된 픽업 코일(413)의 앞 단과 뒷 단의 거리이다.here,

Is the distance between the front end and the rear end of the pickup coil 413 shown in FIG. 4.

6 is a block diagram of a location detection device according to another embodiment of the present invention.

Referring to FIG. 6, the location detection device 600 includes a reception unit 610 and a detection unit 620.

The receiving unit 610 is installed in a form of winding the supply coil in one direction in an environment of a wireless power transmission system including a pickup coil installed in a transportation means and a supply coil installed in a track to generate a magnetic field generated by the pickup coil installed in the transportation means. The first voltage value may be output by receiving.

The detector 620 may detect a position on the track of the vehicle based on the first voltage value.

The receiving unit 610 illustrated in FIG. 6 is the same as the sensing unit described with reference to FIGS. 2 to 5, and the detection unit 620 is the same as the detection circuit unit described with reference to FIGS. 2 to 5, so detailed descriptions thereof are omitted. do.

7 is a flowchart of a location detection method according to an embodiment of the present invention.

The location detection method illustrated in FIG. 7 may be performed by the location detection apparatus 200 illustrated in FIG. 2.

Referring to FIG. 7, in operation 710, the position detecting device detects a magnetic field generated by the pickup coil in the environment of the wireless power transmission system including a pickup coil installed in a transportation means and a supply coil installed in a track, and generates a first voltage value. Can be converted.

In operation 720, the location detecting apparatus 200 may remove the noise of the first voltage value and output the second voltage value.

In operation 730, the location detection device 200 may detect the envelope of the second voltage value and output the third voltage value.

In operation 740, the location detection device 200 may compare the third voltage value with the reference voltage value and output a binary signal.

The location detection method described with reference to FIG. 7 is the same as the operation method of the location detection apparatus 200 described with reference to FIGS. 2 to 6, and detailed descriptions thereof will be omitted.

8 is a flowchart of a method for detecting a location according to another embodiment of the present invention.

The location detection method illustrated in FIG. 8 may be performed by the location detection apparatus 600 illustrated in FIG. 6.

Referring to FIG. 8, in step 810, the position detecting device 600 is installed in a form of winding a supply coil in one direction in an environment of a wireless power transmission system including a pickup coil installed in a transportation means and a supply coil installed in a track. By receiving the magnetic field generated by the pick-up coil installed in the transportation means can output a first voltage value.

In operation 820, the location detecting device 600 may detect a location on the track of the vehicle based on the first voltage value.

The location detection method described with reference to FIG. 8 is the same as the operation method of the location detection apparatus 600 described with reference to FIGS. 2 to 6, and other detailed descriptions are omitted.

The device described above may be implemented with hardware components, software components, and/or combinations of hardware components and software components. For example, the devices and components described in the embodiments include, for example, processors, controllers, arithmetic logic units (ALUs), digital signal processors (micro signal processors), microcomputers, field programmable arrays (FPAs), It may be implemented using one or more general purpose computers or special purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. The processing device may run an operating system (OS) and one or more software applications running on the operating system. In addition, the processing device may access, store, manipulate, process, and generate data in response to the execution of the software. For convenience of understanding, a processing device may be described as one being used, but a person having ordinary skill in the art, the processing device may include a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that may include. For example, the processing device may include a plurality of processors or a processor and a controller. In addition, other processing configurations, such as parallel processors, are possible.

The software may include a computer program, code, instruction, or a combination of one or more of these, and configure the processing device to operate as desired, or process independently or collectively You can command the device. Software and/or data may be interpreted by a processing device or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodied in the transmitted signal wave. The software may be distributed on networked computer systems, and stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment or may be known and usable by those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, and magnetic media such as floptical disks. -Hardware devices specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described by a limited embodiment and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques are performed in a different order than the described method, and/or the components of the described system, structure, device, circuit, etc. are combined or combined in a different form from the described method, or other components Alternatively, even if replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (11)

In an environment of a wireless power transmission system including a pickup coil installed in a vehicle and a supply coil installed in a track, a clockwise magnetic field generated by the front end of the pickup coil and a counterclockwise magnetic field generated by the rear end of the pickup coil A sensing unit which senses and converts the voltage to a first voltage that changes according to a relative position with the pickup coil;
A filter unit removing the noise of the first voltage value and outputting a second voltage value;
An envelope detector configured to detect an envelope of the second voltage value and output a third voltage value; And
And a voltage comparator that compares the third voltage value with a reference voltage value lower than a peak voltage value obtained when the front end and the rear end are positioned on the sensing unit and outputs a binary signal.
Location detection device. According to claim 1,
And a detector for detecting a position on the track of the vehicle based on the binary signal.
Location detection device. According to claim 1,
Further comprising a detector for detecting the speed of the vehicle based on the binary signal
Location detection device. According to claim 1,
The detection unit, the position detection device is a coil wound in one direction on the supply coil. In an environment of a wireless power transmission system including a pickup coil installed in a vehicle and a supply coil installed in a track, a clock installed by winding the supply coil in one direction and generated by the front end of the pickup coil installed in the vehicle A receiving unit configured to receive a counter-clockwise magnetic field generated by a directional magnetic field and a rear end of the pickup coil and output a first voltage value; And
The third voltage value output by detecting the envelope of the second voltage value output by removing the noise of the first voltage value and the reference voltage lower than the voltage value obtained when the front end and the rear end are located on the sensing unit And a detector for comparing the values and receiving the outputted binary signal to detect a position on the track of the vehicle,
The sensing unit detects the clockwise magnetic field and the counterclockwise magnetic field and converts them into the first voltage value changed according to a relative position with the pickup coil.
Location detection device. The method of claim 5,
The detection unit, the position detection device for detecting the speed of the vehicle based on the first voltage value. In an environment of a wireless power transmission system including a pickup coil installed in a vehicle and a supply coil installed in a track, a clockwise magnetic field generated by the front end of the pickup coil and a counterclockwise magnetic field generated by the rear end of the pickup coil Sensing and converting the first voltage value to be changed according to a relative position with the pickup coil;
Removing the noise of the first voltage value and outputting a second voltage value;
Detecting an envelope of the second voltage value and outputting a third voltage value; And
And comparing the third voltage value with a reference voltage value lower than a peak voltage value obtained when the front end and the rear end are positioned on the sensing unit, and outputting a binary signal.
The sensing unit detects the clockwise magnetic field and the counterclockwise magnetic field and converts them into the first voltage value changed according to a relative position with the pickup coil.
Location detection method. The method of claim 7,
And detecting a position on the track of the vehicle based on the binary signal.
Location detection method. The method of claim 7,
And detecting the speed of the vehicle based on the binary signal.
Location detection method. In an environment of a wireless power transmission system including a pickup coil installed in a vehicle and a supply coil installed in a track, a clock installed by winding the supply coil in one direction and generated by the front end of the pickup coil installed in the vehicle Receiving a counter-clockwise magnetic field generated by a directional magnetic field and a rear end of the pickup coil and outputting a first voltage value; And
A reference lower than the third voltage value output by detecting the envelope of the second voltage value output by removing the noise of the first voltage value and the peak voltage value obtained when the front end and the rear end are located on the sensing unit Comparing the voltage value and receiving the output binary signal to detect the position on the track of the vehicle,
The sensing unit detects the clockwise magnetic field and the counterclockwise magnetic field and converts them into the first voltage value changed according to a relative position with the pickup coil.
Location detection method. The method of claim 10,
And detecting the speed of the vehicle based on the first voltage value.
Location detection method.

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