KR20230043641A - Vehicle seat position detection device and method using wireless power transmission system including a plurality of transmission coils - Google Patents

Abstract

According to an embodiment of the present invention, a vehicle seat position detection device comprises: a power receiving module disposed on a vehicle seat; a power transmission module disposed apart from the power receiving module and including a plurality of transmission coils; an inverter supplying power to the power transmission module; and a detection module detecting a position of a vehicle by detecting a change in phase of at least one of current and voltage of the inverter. The detection module detects a position of the vehicle seat by detecting a phase change of the inverter connected to an operating transmission coil among the plurality of transmission coils.

Description

Vehicle seat position detection device and method using wireless power transmission system including a plurality of transmission coils

The present invention relates to an apparatus and method for detecting a vehicle seat position, and more particularly, to an apparatus and method for detecting a vehicle seat position using a wireless power transmission system without a separate sensor.

Recently, as various electronic control systems have been developed, various electronic control systems have been applied to vehicles. Accordingly, various devices and systems inside the vehicle, which were manually controlled in the past, are also electronically controlled.

Among them, controlling the position of a vehicle seat is also an example. In order to electronically control the position of the vehicle seat, a sensor for detecting the position of the vehicle seat is required in addition to a seat module having a motor using DC power.

However, as vehicle control technology gradually develops, various devices and systems such as a heating device, a passenger separator, and various control units are provided inside the vehicle seat in addition to the seat module.

Due to this, the inside of the vehicle seat is gradually becoming more and more complicated and the space becomes narrow, and thus, there is a problem in that it is difficult to mount a sensor for detecting the position of the vehicle seat, and there is a problem in that cost increases when the sensor is installed.

The technical problem to be solved by the present invention is to provide a vehicle seat position detection device and method using an existing wireless power transmission system without a separate sensor.

In addition, the technical problem to be solved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned above will become clear to those skilled in the art from the description below. You will be able to understand.

In order to solve the above technical problem, a vehicle seat position detection device according to an embodiment of the present invention includes a power receiving module disposed in a vehicle seat; a power transmission module disposed apart from the power reception module and including a plurality of transmission coils; an inverter supplying power to the power transmission module; and a detection module configured to detect a position of the vehicle by detecting a change in phase of at least one of current and voltage of the inverter, wherein the detection module includes a phase of the inverter connected to a transmission coil operating among the plurality of transmission coils. The position of the vehicle seat may be detected by detecting the change.

A unique code may be assigned to the plurality of transmission coils according to an arrangement position.

The inverter may include a relay unit selectively connected to at least one of the plurality of transmitting coils, and the power reception module may be connected to a rectifying unit.

A control unit controlling the operation of the inverter according to the required power of the power reception module may be included.

The detection module may detect a change in a phase of at least one of current and voltage of the inverter to detect at least one of vibration and tilting of the vehicle and whether or not a person is seated.

When the vehicle seat is in the first position, the detection module sets the first phase, which is the phase value of the current of the inverter, and the phase value of the voltage of the inverter to the second phase and the unique transmission coil operating among the plurality of transmission coils. A storage unit for storing codes may be included.

When the vehicle seat is in the second position, the moving distance and moving direction of the vehicle seat can be detected through the phase values of the current and voltage of the inverter, the first and second phases, and the unique code of the operating transmission coil. can

The detection module may detect the movement speed of the vehicle seat through the detected movement distance and movement time of the vehicle seat.

In order to solve the above technical problem, a vehicle seat position detection method according to an embodiment of the present invention detects the position of a transmission coil operating with at least one phase value of voltage and current of an inverter when the vehicle seat is in the first position. doing; detecting whether a phase value of at least one of the voltage and current of the inverter changes; and determining whether the vehicle seat vibrates or tilts and a person is seated according to whether the phase value changes.

In the step of detecting the position of the operating transmission coil, the position may be detected through a unique code assigned to the transmission coil.

detecting a change in phase value of at least one of voltage and current of the inverter and a position of an operating transmission coil when the vehicle seat moves and is in a second position; and determining a moving distance and a moving direction of the vehicle seat according to the change in the phase value.

The method may further include determining a moving speed of the vehicle seat according to the phase value change and the moving time of the vehicle seat.

According to embodiments of the present invention, since the position of the vehicle seat can be detected without a separate sensor, the structure inside the vehicle can be further simplified.

In addition, it is possible to detect the exact position and moving direction of the vehicle seat through a transmission coil to which a unique code is assigned according to the position.

In addition, vibration and tilting of the vehicle seat may be detected, it may be determined whether a person is sitting on the vehicle seat, and the distance, speed and acceleration of the vehicle seat may be detected.

In addition, since the location of the vehicle seat is detected using a wireless power transmission system provided to supply power to the vehicle seat, cost reduction and structure simplification can be achieved.

1 is a block diagram of an apparatus for detecting a vehicle seat position according to an embodiment of the present invention.
2 is a block diagram of a vehicle seat position detection device according to another embodiment of the present invention.
3 to 6 show a vehicle seat position detection device according to an embodiment of the present invention.
7 to 11 are flowcharts of a vehicle seat position detection method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in a variety of different forms, and if it is within the scope of the technical idea of the present invention, one or more of the components among the embodiments can be selectively implemented. can be used in combination or substitution.

In addition, terms (including technical and scientific terms) used in this embodiment have meanings that can be generally understood by those of ordinary skill in the art to which this embodiment belongs, unless explicitly specifically defined and described. The meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted in consideration of the contextual meaning of related technology.

In addition, terms used in the present embodiment are for describing the embodiments and are not intended to limit the present invention.

In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when described as "at least one (or more than one) of A and (and) B and C", A, B, and C are combined. may include one or more of all possible combinations.

In addition, in describing the components of this embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the term is not limited to the nature, order, or order of the corresponding component.

And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, the component is directly 'connected', 'coupled', or 'connected' to the other component. In addition to the case, it may include cases where the component is 'connected', 'combined', or 'connected' due to another component between the component and the other component.

In addition, when it is described as being formed or disposed on the "upper (above)" or "lower (below)" of each component, "upper (above)" or "lower (below)" means that two components are directly connected to each other. It includes not only the case of being in contact, but also the case where one or more other components are formed or disposed between two components. In addition, when expressed as "upper (above)" or "lower (down)", the meaning of not only an upward direction but also a downward direction may be included based on one component.

A wireless power transfer (WPT) system is a technology for transferring power without wires through a space, and is a technology that maximizes the convenience of power supply to mobile devices and digital home appliances.

Among the wireless power transmission technologies, the magnetic induction method uses the principle of electromagnetic induction, in which a magnetic field is generated in the coil of the transmitter and the magnetic field is induced in the secondary coil of the receiver to supply current.

Among wireless power transmission technologies, the magnetic resonance method generates a magnetic field that vibrates at a resonant frequency in a transmitter coil so that energy is intensively transmitted only to a receiver coil designed for the same resonant frequency. That is, it is a technology for transmitting power by making magnetic resonance using a frequency ranging from several MHz to several tens of MHz. It can transmit energy with higher efficiency over a longer distance than electromagnetic induction.

Conventionally, a power supply wire has been used to supply power to the vehicle seat, but wireless power transmission technology may be used to extend the movement range of the vehicle seat.

The present invention is a technology capable of detecting the position of a vehicle seat by using a wireless power transmission system for supplying power to the vehicle seat without having a separate position sensor.

1 is a block diagram of a vehicle seat position detection device according to an embodiment of the present invention, FIG. 2 is a block diagram of a vehicle seat position detection device according to another embodiment of the present invention, and FIGS. 3 to 6 are A vehicle seat position detection device according to an embodiment of the present invention is shown, and FIGS. 7 to 11 are flowcharts of a vehicle seat position detection method according to an embodiment of the present invention.

The vehicle seat position detection device 100 according to an embodiment of the present invention may include a power reception module 110, a power transmission module 120, an inverter 130, and a detection module 140, and a control unit 150 ), a rectifier 160 may be further included.

The configuration of the power reception module 110, the power transmission module 120, the inverter 130, and the rectifier 160 included in the vehicle seat position detection device 100 according to an embodiment of the present invention is in a wireless power transmission system. It may be a basic configuration commonly used. Although the rectifying unit 160 is described as being a separate component from the power receiving module 110, the rectifying unit 160 may be included in the power receiving module 110. Although the inverter 130 is described as being a separate component from the power transmission module 120, the inverter 130 may be a component included in the power transmission module 120.

The power reception module 110 may include an impedance matching unit, a rectification unit, a receiving-side converter, a receiving coil, and a load (eg, a battery, a display, an audio output circuit, a hot wire, various sensors, etc.). The power transmission module 120 may include a rectification and filter unit, a transmission-side converter, a gate driver, an inverter, a matching circuit, and a transmission coil. This is an example, and is not particularly limited thereto, and it is natural that a person skilled in the art may further include configurations that can be used in wireless power transmission technology.

The power reception module 110 may be disposed on a vehicle seat, and the power transmission module 120 may be disposed spaced apart from the power reception module 110 .

More specifically, the power reception module 110 may be disposed under a seated portion of a vehicle seat. The power receiving module 110 may be disposed within a seat of a human seating portion of a vehicle seat. The power transmission module 120 may be spaced apart from the power reception module 110 at a predetermined interval. The separation distance between the power transmission module 120 and the power reception module 110 may be a distance at which magnetic flux can be generated by magnetic induction. The power transmission module 120 may be disposed on the floor of the vehicle to receive power from a battery disposed in the vehicle.

The power reception module 110 may include a receiving coil 111 , and the power transmission module 120 may include a transmitting coil 121 .

More specifically, when the wireless power transmission system included in the vehicle seat transmits power only in a magnetic induction method, the transmitting coil 121 and the receiving coil 111 may be induction coils and transmit power only in a magnetic resonance method. In this case, the transmitting coil 121 and the receiving coil 111 may be resonant coils. When power is transmitted by using both the magnetic induction method and the magnetic resonance method, the transmitting coil 121 and the receiving coil 111 may include both an induction coil and a resonance coil.

Referring to FIG. 5 , the transmission coil 121 may include a plurality of coils. The transmitting coil 121 may be arranged according to a plurality of rows and a plurality of columns. For example, the plurality of rows may include rows a, rows b, and rows c, and the plurality of columns may include columns 1 to 6. This is merely exemplary and is not particularly limited thereto.

Each of the plurality of transmission coils 121 may be assigned a unique code according to the arrangement position. For example, a coil disposed in row a, column 1 may be assigned an a1 code, a coil disposed in row b, column 2 may be assigned a code b2, and a coil disposed in row c, column 3 may be assigned a code c3. there is. Hereinafter, the transmitting coil 121 to which the a1 code is assigned may be referred to as an a1 coil.

Referring to FIG. 3 , the left and right directions of the vehicle can be seen as the x-axis, the front and rear directions of the vehicle as the y-axis, and the vertical direction of the vehicle as the z-axis. For wireless power transmission, the transmitting coil 121 and the receiving coil 111 may be arranged to overlap at least a portion of each other in the z-axis direction at their initial positions. When the transmitting coil 121 and the receiving coil 111 overlap each other in a maximum area, wireless power transmission efficiency may be maximized. As the distance between the transmitting coil 121 and the receiving coil 111 decreases in the z-axis direction, wireless power transmission efficiency may increase. As the distance between the transmitting coil 121 and the receiving coil 111 increases in the z-axis direction, wireless power transmission efficiency may decrease.

The power reception module 110 may be connected to the rectifier 160 .

More specifically, the rectifier 160 rectifies the AC power received from the power reception module 110 and generates DC power. The rectifier 160 may be connected to various loads to supply DC power.

The inverter 130 may supply power to the power transmission module 120 .

More specifically, the inverter 130 may receive DC power (not shown) and supply AC power to the power transmission module 120 . The inverter 130 is a component for converting direct current power (DC) into alternating current power (AC), and can be controlled to a desired voltage and frequency through a switching element or a control circuit. The inverter 130 may be referred to as a power conversion unit.

The inverter 130 may include a full bridge circuit composed of four switching elements. Duty and frequency of output voltage and current may be controlled through turn-on-turn-off control of each switching element. Adjusting the output voltage and total current according to the operation control of the switching element is obvious to those skilled in the art, and thus a detailed description thereof will be omitted.

The inverter 130 can adjust the magnitude of the output voltage and current. The inverter 130 may adjust the magnitude of the output voltage and current according to the inductance that is changed by the interaction between the transmission coil 121 and the reception coil 111 . The inverter 130 may adjust the magnitude of the output voltage and current according to a change in inductance caused by a difference in coupling coefficient between the transmitting coil 121 and the receiving coil 111 . Here, the coupling coefficient indicates the degree of electromagnetic coupling between the transmitting coil 121 and the receiving coil 111, and the value of the coupling coefficient decreases as the leakage flux between the two coils increases, and the value of the coupling coefficient decreases as the leakage flux decreases. can grow This is merely illustrative, and is not particularly limited thereto.

A phase change of AC power output from the inverter 130 may occur according to an inductance that is changed by an interaction between the transmission coil 121 and the reception coil 111 . A phase change of at least one of the voltage and current output from the inverter 130 may occur in order to supply constant power to the power reception module 110 . For example, as the leakage flux increases as the distance between the transmitting coil 121 and the receiving coil 111 increases, a phase change of at least one of the voltage and current output from the inverter 130 may increase. Conversely, as the leakage flux decreases as the distance between the transmitting coil 121 and the receiving coil 111 decreases, a phase change of at least one of the voltage and current output from the inverter 130 may decrease.

The inverter 130 may be selectively connected to at least one of the plurality of transmission coils 121 . The inverter 130 may be selectively connected to the plurality of transmission coils 121 through relays or switches. The inverter 130 may output voltage and current to at least one transmitting coil 121 connected thereto.

The inverter 130 can output voltage and current to all of the plurality of transmitting coils 121 during initial operation, and then transmits the transmitting coil 121 in which a phase change occurs due to interaction with the receiving coil 111. Voltage and current may be output only to the transmission coil 121 adjacent to the transmission coil 121 where the phase change occurs.

Referring to FIG. 6( a ) , the receiving coil 111 may be disposed at a first position overlapping the a1 coil and the a2 coil among the plurality of transmitting coils 121 . In this case, the inverter 130 may control the relay unit to selectively output voltage and current only to the a1 coil and the a2 coil. In addition, during the initial operation, the inverter 130 may control voltage and current to be output to all of the plurality of transmission coils 121, and the detection module 140 may control the reception coil 111 among the plurality of transmission coils 121. The position of the vehicle seat 10 can be detected through the unique code of the transmission coil 121 overlapping with the current and voltage phase changes.

In addition, by predicting the positional change of the receiving coil 111, the relay unit can be controlled so that voltage and current are output to the a3 coil, the b1 coil, and the b2 coil disposed adjacent to the a1 coil and the a2 coil. The voltage and current output to the coil and the b2 coil may be weaker than the voltage and current output to the a1 and a2 coils overlapping the receiving coil 111 .

Referring to FIG. 6B , the receiving coil 111 may be disposed at a second position overlapping the b2 coil, the b3 coil, the c2 coil, and the c3 coil among the plurality of transmitting coils 121 . In this case, the inverter 130 may control the relay unit to selectively output voltage and current only to the b2 coil, the b3 coil, the c2 coil, and the c3 coil. In addition, during the initial operation, the inverter 130 may control voltage and current to be output to all of the plurality of transmission coils 121, and the detection module 140 may control the reception coil 111 among the plurality of transmission coils 121. The position of the vehicle seat 10 can be detected through the unique code of the transmission coil 121 overlapping with the current and voltage phase changes.

In addition, by predicting the position change of the receiving coil 111, the relay unit outputs voltage and current to the b1 coil, c1 coil, a2 coil, and a3 coil disposed adjacent to the b2 coil, b3 coil, c2 coil, and c3 coil. The voltage and current output to the b1 coil, c1 coil, a2 coil, and a3 coil can be controlled, and the voltage and current output to the b2 coil, b3 coil, c2 coil, and c3 coil overlap with the receiving coil 111. may be smaller than the size of

In FIG. 6(a), the size of each area where the receiving coil 111 disposed at the first position and the a1 coil or the b2 coil overlap each other is similar to that of the receiving coil 111 disposed at the second position in FIG. 6(b). It is larger than the size of each overlapping area of the b2 coil, the b3 coil, the c2 coil, and the c3 coil. The number of transmitting coils 121 overlapping the receiving coil 111 disposed at the first position is smaller than the number of transmitting coils 121 overlapping the receiving coil 111 disposed at the second position. The intensity of voltage and current output from the inverter 130 to the plurality of transmission coils 121 may vary depending on the number or area of the transmission coils 121 overlapping the reception coils 111 .

For example, as the number of transmitting coils 121 overlapping with the receiving coil 111 decreases, the intensity of voltage and current output from the inverter 130 to the transmitting coil 121 may increase, and the receiving coil 111 As the area of the transmitting coil 121 overlapping with the smaller the area, the intensity of voltage and current output from the inverter 130 to the transmitting coil 121 may increase. This is merely exemplary, and the intensity of current and voltage output from the inverter 130 to the transmission coil 121 may vary according to the power required by the power reception module 110 .

The control unit 150 may control the operation of the inverter 130 according to the required power of the power reception module 110 .

More specifically, the control unit 150 may control the operation of the inverter 130 to adjust the output voltage and current. The control unit 150 may control the operation of the inverter 130 to adjust the phase of at least one of the output voltage and current. When the distance between the transmitting coil 121 and the receiving coil 111 changes according to a change in the position of the vehicle seat, the amount of power supplied to the power receiving module 110 may vary. At this time, the control unit 150 may control the operation of the inverter 130 to supply power of a certain size to the power reception module 110 .

The detection module 140 may detect the position of the vehicle seat 10 by detecting a change in the phase of at least one of the current and voltage of the inverter 130 .

More specifically, the detection module 140 may detect a phase difference of at least one of voltage and current that changes according to a change in inductance caused by a difference in coupling coefficient between the transmitting coil 121 and the receiving coil 111 . When the position of the vehicle seat 10 changes, as the position of the receiving coil 111 disposed on the vehicle seat 10 changes, the inductance between the transmitting coil 121 and the receiving coil 111 changes, and the inverter 130 In order to supply constant power to the power reception module 110, the phase of at least one of the voltage and current output from the inverter 130 also changes.

That is, the detection module 140 may detect a change in position of the vehicle seat 10 by detecting a phase change of at least one of current and voltage output from the inverter 130 . Here, the detection module 140 may detect a positional change of the vehicle seat 10 with only a phase change of the output current of the inverter 130, and the detection module 140 may detect a phase change of the output voltage of the inverter 130. It is possible to detect a change in the position of the vehicle seat 10 only with this.

The detection module 140 detects a change in the position of the vehicle seat 10 according to a change in the phase of at least one of the output voltage and current of the inverter 130 based on when the vehicle seat 10 is in a specific position. can In the detection module 140, data about the relationship between the amount of change in the phase of at least one of the voltage and current of the inverter 130 and the amount of change in the position of the vehicle seat 10 may be stored in a storage unit as a look-up table (LUT). there is. Here, the amount of change in the position of the vehicle seat 10 may mean data according to the movement of the vehicle seat 10 in each direction of the x-axis, y-axis, and z-axis, and two axes of the x-axis, y-axis, and z-axis This may refer to data according to the movement of the vehicle seat in the combined direction or the movement of the vehicle seat in the direction in which the three axes are combined.

The detection module 140 may detect a change in phase of at least one of current and voltage of the inverter 130 to detect at least one of vehicle vibration, tilting, and whether a person is seated.

For example, when the detection module 140 detects that the phase change of the output current and voltage of the inverter 130 occurs minutely and repeatedly without a specific direction in a relatively short time, it is determined that vibration has occurred in the vehicle seat. can do. The detection module 140 may determine that tilting has occurred in the vehicle seat when it detects that the phase change of the output current and voltage of the inverter 130 occurs minutely in a relatively short time. When the detection module 140 determines that movement in the z-axis direction has occurred according to the phase change of the output current and voltage of the inverter 130, it is possible to determine whether a person is seated or not.

When the vehicle seat 10 is in the first position, the detection module 140 stores the first phase, which is the phase value of the current of the inverter 130, and the second phase, which is the phase value of the voltage of the inverter 130, in the storage unit, respectively. can be saved Here, the first position means a specific position serving as a reference point for determining a change in the position of the vehicle seat, may mean an initial position where the vehicle seat is not moved, and the position of the vehicle seat adjusted by the driver to fit the body. can mean Alternatively, when the position of the vehicle seat does not change for a certain period of time, the corresponding position may be set as the first position.

When the vehicle seat 10 moves from the first position to the second position, the detection module 140 compares the current and voltage phase values of the inverter 130 with the first and second phases stored in the storage unit, The movement distance of the seat 10 can be detected. Here, the moving distance of the vehicle seat 10 may be detected by comparing only the phase value of the current of the inverter 130, and the moving distance of the vehicle seat 10 may be detected by comparing only the phase value of the voltage of the inverter 130. can do.

When the vehicle seat 10 moves from the first position to the second position, the detection module 140 may detect the movement speed or movement acceleration of the vehicle seat 10 in consideration of the movement time.

For example, when the detection module 140 detects that the phase values of the output current and voltage of the inverter 130 gradually increase over time, the vehicle seat 10 is moving away from the initial position in a specific direction. can be detected. When the detection module 140 detects that the phase values of the output current and voltage of the inverter 130 gradually decrease with time, the vehicle seat 10 moved far from the initial position gradually approaches the initial position again, and can be detected.

The detection module 140 may detect the first position of the vehicle seat by analyzing a unique code of the transmission coil 121 where a phase value change of at least one of the voltage and current of the inverter 130 occurs. By analyzing the unique code of the transmitting coil 121, the position of the transmitting coil 121 where the electromagnetic interaction with the receiving coil 111 has occurred can be known, so that the accurate first position of the vehicle seat 10 can be detected. .

That is, when one transmission coil is disposed, only the amount of change in the phase value is detected according to the scalar value, so only the amount of change in position relative to the reference position can be known, and the exact position of the vehicle seat 10 cannot be detected. Since the position of the transmitting coil in which the phase value changes according to the position change of the receiving coil can be known through the plurality of transmitting coils to which the unique code is assigned, the exact position and direction of the vehicle seat can be detected according to the vector value.

The detection module 140 may more accurately detect the position of the vehicle seat 10 by considering the intensity and phase value change of the voltage and current output to the transmitting coil 121 overlapping the receiving coil 111 together. For example, when the receiving coil 111 is arranged to overlap at the center of two transmitting coils, the same voltage and current intensity is output to each of the two overlapping transmitting coils and the same phase value change occurs through The position of the vehicle seat 10 can be detected. In addition, when the receiving coil 111 overlaps two transmitting coils and the overlapping area of one coil is larger than the overlapping area of the other coil, the intensity of the voltage and current output to each transmitting coil The position of the vehicle seat 10 may be detected according to the ratio. Alternatively, the position of the vehicle seat 10 may be detected according to the ratio of the phase value variation of the voltage and current output from each transmission coil.

7 to 11 are flowcharts of a vehicle seat position detection method according to an embodiment of the present invention. The detailed description of each step of FIGS. 7 to 11 corresponds to the detailed description of the device for detecting a vehicle seat position of FIGS. 1 to 6 , and thus, overlapping descriptions will be omitted.

In detecting the vehicle seat position according to an embodiment of the present invention, at least one phase value of the voltage and current of the inverter is detected when the vehicle seat is in the first position in step S11, and the voltage of the inverter is detected in step S12. and current, and detects whether or not a phase value of at least one of them is changed, and determines whether the vehicle seat is vibrated, tilted, and a person is seated according to whether or not the phase value is changed in step S13.

In detecting the vehicle seat position according to another embodiment of the present invention, including step S11, detecting a change in at least one phase value of voltage and current of the inverter when the vehicle seat moves and is in the second position in step S14, , In step S15, the moving distance from the first position to the second position of the vehicle seat is determined according to the change in the phase value of the inverter.

In detecting the position of the vehicle seat according to another embodiment of the present invention, the first position of the vehicle seat may be detected by analyzing the unique code of the transmission coil included in the phase value of the inverter in step S11, and in step S16. .

In detecting the vehicle seat position according to another embodiment of the present invention, including step S11, detecting a change in the phase value of at least one of the voltage and current of the inverter when the vehicle seat moves and is in the second position in step S16, In step S17, the movement direction and distance of the vehicle seat may be detected by analyzing the unique code of the transmission coil included in the phase value of the inverter.

In detecting the vehicle seat position according to another embodiment of the present invention, steps S11 and S17 are included, and in step S19, the vehicle seat is moved in consideration of the unique code and movement time of the transmission coil included in the phase value of the inverter. Direction and movement speed can be detected.

According to the embodiments of the present invention, since the position of the vehicle seat can be detected without a separate sensor, the structure inside the vehicle can be further simplified. In addition, it is possible to detect the exact position and moving direction of the vehicle seat through a transmission coil to which a unique code is assigned according to the position. In addition, vibration and tilting of the vehicle seat may be detected, it may be determined whether a person is sitting on the vehicle seat, and the distance, speed and acceleration of the vehicle seat may be detected. In addition, since the location of the vehicle seat is detected using a wireless power transmission system provided to supply power to the vehicle seat, cost reduction and structure simplification can be achieved.

Those skilled in the art related to this embodiment will be able to understand that it can be implemented in a modified form within a range that does not deviate from the essential characteristics of the above description. Therefore, the disclosed methods are to be considered in an illustrative rather than a limiting sense. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

10: vehicle seat 100: vehicle seat position detection device
110: power receiving module 120: power transmitting module
130: inverter 140: detection module
150: control unit 160: rectification unit

Claims (12)

A power receiving module disposed on a vehicle seat;
a power transmission module disposed apart from the power reception module and including a plurality of transmission coils;
an inverter supplying power to the power transmission module; and
A detection module detecting a position of a vehicle by detecting a change in a phase of at least one of current and voltage of the inverter;
The detection module detects a position of a vehicle seat by detecting a phase change of the inverter connected to a transmission coil operating among the plurality of transmission coils. According to claim 1,
A vehicle seat position detection device in which a unique code is given to the plurality of transmission coils according to the position in which they are placed. According to claim 1,
The inverter includes a relay unit selectively connected to at least one of the plurality of transmission coils,
The power receiving module is a vehicle seat position detection device connected to the rectifying unit. According to claim 1,
Vehicle seat position detection device comprising a control unit for controlling the operation of the inverter according to the required power of the power reception module. According to claim 1,
The detection module detects a change in the phase of at least one of the current and voltage of the inverter to detect at least one of vehicle vibration, tilting, and whether a person is seated. According to claim 1,
When the vehicle seat is in the first position, the detection module sets the first phase, which is the phase value of the current of the inverter, and the phase value of the voltage of the inverter to the second phase and the unique transmission coil operating among the plurality of transmission coils. Vehicle seat position detection device comprising a storage unit for storing the code. According to claim 6,
Detecting the moving distance and moving direction of the vehicle seat through the phase values of the current and voltage of the inverter, the first and second phases, and the unique code of the operating transmission coil when the vehicle seat is in the second position Vehicle seat position detection device. According to claim 7,
Wherein the detection module detects a moving speed of the vehicle seat through the detected moving distance and moving time of the vehicle seat. detecting a position of a transmission coil operating with a phase value of at least one of voltage and current of an inverter when the vehicle seat is in a first position;
detecting whether a phase value of at least one of the voltage and current of the inverter changes; and
and determining whether the vehicle seat is vibrated, tilted, and a person is seated according to whether the phase value is changed. According to claim 9,
The step of detecting the position of the operating transmission coil is
A vehicle seat position detection method for detecting a position through a unique code assigned to the transmission coil. According to claim 9,
detecting a change in phase value of at least one of voltage and current of the inverter and a position of an operating transmission coil when the vehicle seat moves and is in a second position; and
The vehicle seat position detection method further comprising determining a movement distance and a movement direction of the vehicle seat according to the phase value change. According to claim 10,
The vehicle seat position detection method further comprising determining a movement speed of the vehicle seat according to the phase value change and the movement time of the vehicle seat.

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