KR20150104284A - Wireless power transmission management system in living room - Google Patents

Wireless power transmission management system in living room Download PDF

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Publication number
KR20150104284A
KR20150104284A KR1020140025810A KR20140025810A KR20150104284A KR 20150104284 A KR20150104284 A KR 20150104284A KR 1020140025810 A KR1020140025810 A KR 1020140025810A KR 20140025810 A KR20140025810 A KR 20140025810A KR 20150104284 A KR20150104284 A KR 20150104284A
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KR
South Korea
Prior art keywords
power
human body
power transmission
living room
sensor
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Application number
KR1020140025810A
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Korean (ko)
Inventor
장원호
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(특수법인)한국전파진흥협회
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Priority to KR1020140025810A priority Critical patent/KR20150104284A/en
Publication of KR20150104284A publication Critical patent/KR20150104284A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention relates to a wireless power transmission management system in a living room. The wireless power transmission management system includes: a power transmitter which is located in a living room of a house and transmits wireless power through a transmitting antenna of a magnetic resonance method; a power receiver which has a receiving antenna resonating with the transmitting antenna within a near field of the power transmitter and wirelessly receives the power from the power transmitter; and a display means which is installed in the living room and displays information about a charging state of the power transmitter and an access permitted area.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless power transmission management system in a living room,

The present invention relates to a system for managing wireless power transmission in a living room of a home, and more particularly, to a system for managing wireless power transmission in a living room of a home, comprising a wireless charging device of a magnetic induction type in a living room, And more particularly to a wireless power transmission management system in a living room for receiving a wireless charging service.

In recent years, the use of portable electronic devices and wireless home appliances has greatly increased, and wireless power transmission technology is also developing at a rapid pace in order to eliminate the inconvenience of charging a battery by wire. The wireless power transmission technology of magnetic induction (MI) and magnetic resonance (MR) is a wireless charging technology that is leading the market in recent years.

The magnetic charging technique of the magnetic induction type is a method of generating a magnetic field by flowing a current to the transmitting terminal coil and charging the current by generating a magnetic field to the receiving terminal coil. As a charging technique which has been mainly used in electric toothbrushes and razors in the past, there is an advantage that a very high charging efficiency can be obtained within a short distance. The charging efficiency is high, and development is proceeding by trying to charge the mobile phone or notebook wirelessly. However, when the distance between the transmitting end and the receiving end is increased, the charging efficiency drops sharply.

The self-resonant wireless charging technology was first introduced by MIT Marin Soljacic in 2007. It uses a phenomenon in which the energy is transferred by the attenuation wave coupling when the frequency between the transmitting and receiving coils resonates within the near magnetic field, to be. The self-resonant wireless charging technology is capable of transmitting electric power from a distance as compared with the magnetic induction method, and has a merit that power can be transmitted from a distance of several tens of cm to several meters depending on the size and characteristics of the resonant transmitting and receiving coils. In addition, the self-resonant wireless charging technique has an advantage that power can be transmitted to a plurality of devices using one transmission coil when the resonance frequencies of the devices located within the charging radius coincide with each other.

When an object exists between a transmitter and a receiver in a self-resonant wireless power transmission, an object may be influenced by a magnetic field. If the human body is located within a wireless charging radius, the influence on the human body is minimized There is a need.

Korean Patent Laid-Open Publication No. 10-2013-0068921 proposes a method for minimizing the influence of a magnetic field generated in a wireless power transmission on the human body. The prior art detects a human body existing around the wireless power transmission device, determines the influence of the received power on the human body, and adjusts the magnitude of the transmitted power based on the determination result. The self- Thereby minimizing the influence on the human body caused by the wearer's body.

However, if the distance between the transmitting end and the human body can not be accurately detected, or if the proper power control control fails, the human body may be exposed to a harmful magnetic field. Above all, if such a problem occurs in the home, the family member may be in a dangerous danger, which is a great difficulty in introducing a wireless charging system in the home.

Korean Patent Publication No. 10-2013-0068921

The present invention can wirelessly charge household appliances such as TVs by performing a self-resonating wireless charging in a living room. When a human body approaches a harmful nearby area, the wireless charging is stopped or the output is shut down to secure the human body. Of course, the user can be informed of the wireless charging status and the access permitted zone so that the user can recognize and avoid the charging failure or the failure of the charging. And an object thereof is to provide a wireless power transmission management system.

A wireless power transmission management system in a living room according to an embodiment of the present invention includes a power transmission device located in a living room of a home and performing wireless power transmission through a transmission antenna of a self resonance type; A power receiving device having a receiving antenna that resonates with a transmitting antenna of the power transmitting device in a near field of the power transmitting device and receives power from the power transmitting device wirelessly; And display means installed in the living room for displaying information on a charging state and an access permission zone of the power transmitting device, the power transmitter detecting that the power receiver is located in the ON state in the near field A power receiver sensing circuit; A human body detecting sensor for detecting whether the human body approaches or approaches the inside of the near field; Controls the output intensity of the transmitting antenna according to an output signal of the power receiving device sensing circuit and controls the power transmission of the power transmitting device to be stopped or lowered when a detection signal of the human body detecting sensor occurs, And a controller for controlling the display means to display information on the charging state and the access permission zone of the power transmission device.

According to another aspect of the present invention, there is provided a wireless power transmission management system in a living room, wherein the human body detection sensor includes a PIR (Pyroelectric Infrared Ray) sensor for sensing an approach of a human body, And an ultrasonic sensor for detecting a distance, and the controller calculates the approach distance of the human body from the signal detected by the ultrasonic sensor when the approach of the human body is detected by the PIR sensor.

According to the wireless power transmission management system in the living room of the present invention, when wireless power is supplied to a portable electronic device such as a TV set in a living room or a portable terminal such as a cellular phone by a self-resonant method, By stopping the charging or turning off the output and informing the user of the wireless charge status and the information of the access permission zone, the user can recognize the wireless charge status and the danger information, and the damage of the human body due to the magnetic resonance wireless charge And the introduction of the wireless power transmission system into the home can be promoted.

1 is a block diagram illustrating a typical wireless power transmission system,
2 is a circuit diagram illustrating a transmission antenna configuration of a power transmission device,
3 is a view showing a state where a power transmitter is embedded in a table in the present invention,
4 is a block diagram illustrating a configuration of a power transmitting device in the present invention, and Fig.
5 is a block diagram illustrating a wireless power transmission management system in accordance with the present invention.

Hereinafter, specific embodiments according to the present invention will be described with reference to the accompanying drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Parts having similar configurations and operations throughout the specification are denoted by the same reference numerals. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

In the following description of the embodiments, redundant descriptions and explanations of techniques obvious to those skilled in the art are omitted. Also, in the following description, when a section is referred to as "comprising " another element, it means that it may further include other elements in addition to the described element unless otherwise specifically stated.

 Also, the terms "to", "to", "to", and "modules" in the specification mean units for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software . In addition, when a part is electrically connected to another part, it includes not only a case directly connected but also a case where the other parts are connected to each other in the middle.

1 is a block diagram illustrating a typical wireless power transmission system. The power transmitting apparatus 100 and the power receiving apparatus 200 are wirelessly coupled within a magnetic field radius and when the resonant frequencies of the power transmitting apparatus 100 and the power receiving apparatus 200 coincide with each other, The charging power is transmitted from the transmitting device 100 to the power receiving device 200 side. The wireless power transmission in the present invention is implemented by such a self resonance method.

The coupling mode is activated with the receiving antenna 210 of the power receiving device 200 in the near field formed by the transmitting antenna 100 of the power transmitting device 100 and power transmission is performed in the near field. In the self-resonant wireless power transmission, power transmission loss is minimized when the resonance frequency is exactly the same.

As shown in Fig. 1, the power transmitting apparatus 100 includes an oscillator 102, an amplifier 104, a filter 106, a matching circuit 108, and a transmitting antenna 110.

The oscillator 102 oscillates at a desired frequency level by the oscillation frequency adjustment circuit. The amplifier 104 amplifies the signal oscillated by the oscillator 102, and the amplified signal is filtered by the filter 106 to remove noise components. For example, the filter 106 is a low pass filter (LPF). The matching circuit 108 matches the impedance of the power transmitter 100 to the transmitting antenna 110. For example, the matching circuit 108 comprises a series-parallel combination circuit of capacitors.

2 is a circuit diagram illustrating a transmission antenna configuration of a power transmission device. Referring to this, the transmitting antenna 110 is a coil for generating an inductance, and capacitors C1 and C2 for resonance are added thereto. The radio power radiated from the transmitting antenna 110 is transmitted to the power receiving device 200 side in the vicinity of a predetermined distance, which coincides with the resonance frequency generated by the coil and the capacitors C1 and C2.

The power receiving apparatus 200 includes a receiving antenna 210 for receiving power wirelessly, and a matching circuit, a rectifying circuit, a switch, and the like for converting the received power into DC power suitable for an electric appliance on which the power receiver is mounted . The electric appliance on which the power receiving device 200 is mounted is, for example, a wireless home appliance such as a TV, audio, and an electric port, or a portable (or wireless) terminal such as a mobile phone, a tablet PC, and a notebook.

The wireless power transmission management system in the living room of the present invention is installed in a living room of a home. Preferably, the power transmitting device 100 is installed in the table 130 in which the family members sits in the living room as shown in FIG. Such a table 130 is generally located at the center of the living room, so that a wider area can be formed. It is preferable that the top structure of the table 130 in which the power transmission device 100 is embedded is formed of a material that can pass the radio waves well. Of course, the power transmitting device 100 may be installed at another position that can be concealed in the living room.

An adapter 120 is connected to the power transmitter 100 to convert commercial power to DC power, and receives DC power to generate power to be transmitted wirelessly. When a wireless home appliance 220 such as a TV or a user terminal 230 such as a cellular phone is located within a power transmission radius of the power transmitter 100, a wireless power transmission is started while a near field is formed.

FIG. 4 is a block diagram illustrating a configuration of a power transmission device according to the present invention, and FIG. 5 is a block diagram illustrating a wireless power transmission management system according to the present invention. Hereinafter, the wireless power transmission management system according to the present invention will be described in more detail with reference to the drawings.

4, the power transmitter 100 according to the present invention further includes a controller 150, a power receiver sensing circuit 152, human body detection sensors 154 and 156, and a display means 158. [

The power receiving device sensing circuit 100 is a circuit that senses whether the power receiving device 200 is located within the wireless power radial radius. When no signal is generated in the power receiving device sensing circuit 100, the oscillator 102 oscillates at a low frequency level enough to provide initial power to the power receiving device 200 located in the near field.

If the power receiving device 200 is located in the near field and the power receiving device 200 is turned on to couple with the power transmitting device 100, the power receiving device sensing circuit 100 senses the coupling. And the oscillation frequency is increased by the adjustment circuit connected to the oscillator 102 to enter a high power transmission mode for charging.

The human body detection sensors 154 and 156 are configured by a combination of a PIR (Pyroelectric Infrared Ray) sensor 154 and an ultrasonic sensor 156. The controller 150 calculates the accessibility and approach distance of the human body according to the detection signals of the PIR sensor 154 and the ultrasonic sensor 156.

The PIR sensor 154 detects the change of infrared rays, so it reacts to the human body's approach but does not respond to objects such as inanimate objects. The ultrasonic sensor 156 is capable of detecting the approach distance in response to the intensity of the ultrasonic waves transmitted in response to both the human body and the object. The controller 150 can determine whether the human body or the object is approaching and perform corresponding control using the characteristics of each of the heterogeneous sensors.

For example, the controller 150 does not have a detection signal in the PIR sensor 154, but when the ultrasonic sensor 156 generates a detection signal, the controller 150 determines that an object other than the human body is approaching. In this case, high-power wireless charging is performed.

As another example, when the detection signal is commonly output from the PIR sensor 154 and the ultrasonic sensor 156, the controller 150 determines that the human body is approaching. In this case, the risk of the human body is calculated in the near field from the approach distance of the human body detected by the ultrasonic sensor 156. When the human body approaches the human body to a high degree of risk, the controller 150 controls to stop the power transmission of the power transmitting device 100 or to lower the output so as not to be dangerous to the human body.

The size of the near field formed between the transmitting antenna 110 and the receiving antenna 210 is related to coil size and resonance frequency on both sides. Therefore, it is possible to know the size of the near field by detecting information about the receiving antenna 210 of the power receiving device 200, a resonance frequency, etc., or receiving it from the power receiving device. The wireless charging status information can be extracted from the size of the near field, and it is possible to calculate the access permission area (centered on the power transmitter) of the human body from the correlation between the size of the near field and the approach distance of the human body. Information on the calculated charge state and the access permission area is displayed through the display means 158. [ It may also be delivered to the messaging server 400 described below with reference to FIG.

The display means 158 is mounted on the table 130 and is constituted by a small display such as an LCD (Liquid Crystal Display), an OLED (Organic Light Emitting Diode), and an AMOLED (Active Matrix Organic Light Emitting Diode). The display means 158 displays the charged state information calculated by the controller 150 and the accessible area information of the human body so that the family members sitting around the table 130 can see the wireless home appliance 220 or the user terminal 230) and the access permission zone to the user.

Referring to FIG. 5, the wireless power transmission management system of the present invention may include a database server 300 and a messaging server 400. The database server 300 and the messaging server 400 may be established in a remote hosting server connected via a wired or wireless network.

The database server 300 is a server that stores and manages management history, failure information, charge state information, and the like of the power transmission device 100. The messaging server 400 is a server for transmitting information on the charged state of the power transmitting device 100 and the accessible area of the human body to the user terminal 230 of the user using the wireless charging service in the living room.

The messaging server 400 is connected to the user terminal 230 through a mobile network 500 such as Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), and Long Term Evolution (LTE) And the like. For example, the messaging server may be implemented as an UMS (Unified Messaging Service) server, and may transmit information on charging status and access permission zone in the form of a short message or a multimedia message to the user terminal 230 side.

The invention described above is susceptible to various modifications within the scope not impairing the basic idea. In other words, all of the above embodiments should be interpreted by way of example and not by way of limitation. Therefore, the scope of protection of the present invention should be determined in accordance with the appended claims rather than the above-described embodiments, and should be construed as falling within the scope of the present invention when the constituent elements defined in the appended claims are replaced by equivalents.

100: power transmitter 102: oscillator
104: amplifier 106: filter
108: matching circuit 110: transmitting antenna
120: Adapter 130: Table
150: Controller 152: Power receiving device detection circuit
154: PIR sensor 156: Ultrasonic sensor
158: Display means 200: Power receiving device
210: Receive antenna 220: Wireless household appliances
230: user terminal 300: database server
400: Messaging Server 500: Mobile network

Claims (2)

A power transmitting device located in a living room of a home and performing wireless power transmission through a transmission antenna of a self resonance type;
A power receiving device having a receiving antenna that resonates with a transmitting antenna of the power transmitting device in a near field of the power transmitting device and receives power from the power transmitting device wirelessly; And
And display means provided in the living room for displaying information on a charging state and an access permission zone of the electric power transmission device,
The power transmitter includes:
A power receiver sensing circuit for sensing that the power receiver is located in the on-state in the near field;
A human body detecting sensor for detecting whether the human body approaches or approaches the inside of the near field;
Controls the output intensity of the transmitting antenna according to an output signal of the power receiving device sensing circuit and controls the power transmission of the power transmitting device to be stopped or lowered when a detection signal of the human body detecting sensor occurs, And a controller for controlling the display means to display information on a charging state and an access permission zone of the power transmission device.
The method according to claim 1,
The human body detection sensor is composed of a PIR (Pyroelectric Infrared Ray) sensor for sensing the approach of the human body and an ultrasonic sensor for sensing the approach distance of the object using the ultrasonic waves conveyed from the object.
Wherein the controller calculates the approach distance of the human body from the signal detected by the ultrasonic sensor when the human body is detected by the PIR sensor.
KR1020140025810A 2014-03-05 2014-03-05 Wireless power transmission management system in living room KR20150104284A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170082029A (en) * 2016-01-05 2017-07-13 삼성전자주식회사 Display apparatus and the control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170082029A (en) * 2016-01-05 2017-07-13 삼성전자주식회사 Display apparatus and the control method thereof
WO2017119646A3 (en) * 2016-01-05 2018-02-22 Samsung Electronics Co., Ltd. Display apparatus and control method thereof
US10310582B2 (en) 2016-01-05 2019-06-04 Samsung Electronics Co., Ltd. Display apparatus and control method thereof

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