WO2022108426A1

WO2022108426A1 - Three-dimensional wireless power transmission path control method and wireless power transmission system using same

Info

Publication number: WO2022108426A1
Application number: PCT/KR2021/020312
Authority: WO
Inventors: 조동호; 송용준; 심유진
Original assignee: 한국과학기술원
Priority date: 2020-11-17
Filing date: 2021-12-30
Publication date: 2022-05-27

Abstract

According to various embodiments of the present document, provided is a power transmission control method comprising the steps of: acquiring image data in proximity to a wireless power transmission system; identifying a reception device within the image data by using an artificial neural network; acquiring three-dimensional location information about the reception device on the basis of the identified reception device and the already acquired location information about a detection module; determining a wireless power transmission path on the basis of the three-dimensional location information about the reception device; and transmitting the wireless power to the reception device.

Description

3D wireless power transmission path control method and wireless power transmission system using same

Various embodiments disclosed in this document relate to a wireless power transmission method and a wireless power transmission system using the same, and more particularly, to a method for controlling a wireless power transmission path in three dimensions and a wireless power transmission system using the same.

If it is possible to detect nearby people during wireless power transmission and determine the location information of the receiving device, the risk that may occur during wireless power transmission can be prevented in advance, and the efficiency of wireless charging can be improved by focusing on the location of the receiver. .

In the existing magnetic induction or magnetic resonance short-distance wireless charging method, the space between the devices was narrow, so the importance to understand the danger to adjacent objects, people, or animals was insufficient. could be improved

Recently, as a remote wireless power transmission technology using RF has been developed, a demand for charging a receiving device at a distance of several m to several tens of m is increasing.

However, due to the distance between the distant transmitter and the receiving device, there is a possibility that people and animals may invade the charging path, and a technology for recognizing the danger in advance is required to avoid the effect of electric power applied thereto. to be.

According to various embodiments, a system for increasing the efficiency of wireless power transmission over a long distance and minimizing damage to humans and animals due to high power by using three-dimensional location estimation of living things and humans using a plurality of cameras and computing devices will be provided. can

According to various embodiments, a power control device including a first processor; a plurality of sensing devices connected to the power control device by wire or wirelessly and including an image sensor and a second processor; and a power transmission module connected to the power control device to radiate power wirelessly, wherein the sensing device acquires image data near the wireless power transmission system to identify a receiving device in the image data, and the power The control device may be provided with a wireless power transmission system that determines a three-dimensional position of the identified receiving device and generates a control signal for wireless power transmission to the power transmission module based on the three-dimensional position of the receiving device. can

According to various embodiments, there is provided a power transmission control method using a wireless power transmission system, the method comprising: acquiring image data near the wireless power transmission system; identifying a receiving device in the image data using an artificial neural network; obtaining three-dimensional position information of the receiving device based on the identified receiving device and the previously obtained position information of the sensing module; determining a wireless power transmission path based on the 3D location information of the receiving device; and transmitting power wirelessly to the receiving device.

According to various embodiments, an accurate location of a receiving device receiving wireless power transmission may be identified, and the efficiency of RF wireless power transmission may be improved as the distance from the receiving device increases. In addition, wireless power transmission may be facilitated in various environments in which people and animals exist indoors or outdoors.

1 illustrates an embodiment of a wireless power transmission system according to various embodiments.

2 is a block diagram illustrating a configuration of a wireless power transmission system according to various embodiments.

3 is a block diagram illustrating a power control device according to various embodiments.

4 is a block diagram illustrating a sensing device according to various embodiments.

5 is a flowchart schematically illustrating a wireless power transmission method according to various embodiments.

6 is a flowchart illustrating an embodiment of a method for determining a location of a receiving device according to various embodiments of the present disclosure;

7 is a diagram illustrating a process of determining an object in an image according to various embodiments of the present disclosure;

8 is a diagram illustrating a method of calculating a three-dimensional position in an image according to various embodiments of the present disclosure;

9 shows an example of a wireless power environment represented by three-dimensional coordinates.

10 is a flowchart illustrating a method of setting a power transmission direction according to various embodiments.

11 is a diagram illustrating a change in a location of a wireless power transmission module according to various embodiments of the present disclosure;

12 is a flowchart illustrating a method of determining whether to transmit power according to various embodiments of the present disclosure.

13 is a diagram illustrating an example of determining whether to transmit power according to various embodiments of the present disclosure;

14 is a flowchart illustrating a method of stopping power transmission according to various embodiments.

1 illustrates an embodiment of a wireless power transmission system according to various embodiments. 2 is a block diagram illustrating a configuration of a wireless power transmission system according to various embodiments.

1 and 2 , the wireless power transmission system 100 may transmit wireless power to the receiving device 20 . For example, the wireless power transmission system 100 may determine the location of the receiving device 20 in the wireless power environment 10 and wirelessly transmit power to the receiving device 20 .

In various embodiments, the receiving device 20 may collectively refer to various electronic devices that can be charged by receiving wireless power. As an example, the receiving device 20 may be a mobile device (eg, a smart phone). However, the present disclosure is not limited thereto, and the spirit of the present disclosure may be applied to any device capable of receiving wireless power. The receiving device 20 may include a receiving antenna for receiving wireless power, and may be a device capable of transmitting/receiving data with the wireless power transmission system 100 .

Also, in the present disclosure, a plurality of receiving devices 20 may exist, and the wireless power transmission system 100 may simultaneously transmit wireless power to a plurality of receiving devices 20 . That is, the contents in the following description of the present disclosure may be applied even when charging the plurality of receiving devices 20 . However, for convenience of explanation, in the following description, the content of wireless power transmission to one receiving device 20 will be mainly described.

According to various embodiments, the wireless power transmission system 100 may determine a wireless power transmission path between the power transmission module 1200 and the reception device 20 of the reception device 20 . For example, the wireless power transmission system 100 determines the existence and location of objects and/or living things between the power transmission module 1200 and the receiving device 20 , and determines a path of wireless power transmission based thereon can In the following description of the present disclosure, for convenience of explanation, objects (eg, objects or living things) other than the wireless power transmission system 100 and the receiving device 20, which are targets of wireless power transmission and reception, are We will refer to it as an 'object'. For example, the object may be a person located in the wireless power transmission path, or an object such as a desk or a building.

According to various embodiments, the wireless power transmission system 100 may determine an object position between the wireless power transmission system 100 and the receiving device 20 using various computing-algorithms.

As an example, the computing-algorithm may be provided as a machine-learning model. A representative example of a machine learning model may include an artificial neural network. Specifically, a representative example of an artificial neural network is a deep learning-based artificial neural network that includes an input layer that receives data, an output layer that outputs a result, and a hidden layer that processes data between the input and output layers. . Specific examples of the artificial neural network include a regression analysis artificial neural network (Convolution Neural Network), a recurrent neural network (Recurrent Neural Network), a deep neural network (Deep Neural Network), etc., and the artificial neural network described later in the present disclosure is the artificial neural network described above, It should be interpreted as a comprehensive meaning that includes all other artificial neural networks of various types and combinations thereof, and does not necessarily have to be a deep learning series.

In addition, the machine learning model does not necessarily have to be in the form of an artificial neural network model, and in addition, nearest neighbor algorithm (KNN), random forest, support vector machine (SVM), principal component analysis (PCA), etc. may be included. , it may include all of the above-mentioned techniques in an ensemble form or a form in which other methods are combined in various ways. On the other hand, it is stated in advance that the artificial neural network can be replaced with another machine learning model unless otherwise specified in the embodiments mentioned mainly with the artificial neural network.

Furthermore, in the present specification, the computing algorithm is not necessarily limited to a machine learning model. That is, the computing algorithm may include various judgment/decision algorithms rather than a machine learning model.

Therefore, in the present disclosure, the computing algorithm is a comprehensive algorithm including all types of algorithms for determining the position of an object or determining a transmission path of wireless power using data collected about the object (eg, image data of the object). Make it clear in advance that it should be understood as meaning.

Referring to FIG. 2 , the wireless power transmission system 100 may include a power control device 1000 , a power transmission module 1200 , and a sensing device 2000 . Here, there may be a plurality of sensing devices 2000 . For the wireless power transmission system 100 of FIGS. 2 to 4 , the description of the wireless power transmission system 100 described above in FIG. 1 may be applied mutatis mutandis.

According to various embodiments, the power control apparatus 1000 may control a parameter related to power transmitted from the wireless power transmission system 100 to the receiving device 20 . For example, the parameter may be an intensity of power to be transmitted to the receiving device 20 , an amount of power or a time at which the power is to be transmitted.

According to various embodiments, the power control apparatus 1000 may determine a path for wireless power transmission from the wireless power transmission system 100 to the receiving device 20 . For example, the power control device 1000 obtains, from one or more sensing devices 2000 , information about a location and/or an object of the receiving device 20 for wireless power transmission, and determines a wireless power transmission path. can be optimized For example, the power control apparatus 1000 may adjust the wireless power transmission path by changing the location of the power transmitter (eg, the transmission antenna 1200 ). This will be described later.

According to various embodiments, the power control apparatus 1000 may determine one or more receiving devices 20 for transmitting wireless power from among a plurality of receiving devices 20 in the wireless power environment 10 . For example, the power control device 1000 obtains information about the receiving device 20 and/or an object from one or more sensing devices 2000 , and based on this, the receiving device 20 for wirelessly transmitting power can be decided

According to various embodiments, the power control apparatus 1000 may transmit an electrical signal for wireless power transmission to the power transmission module 1200 . For example, the power control apparatus 1000 may supply power to the power transmission module 1200 . As another example, the power control apparatus 1000 may transmit information about the above-described parameters related to wireless power (eg, strength, amount, and transmission time of wireless power) to the power transmission module 1200 . As another example, the power control apparatus 1000 may transmit a signal for adjusting a wireless power transmission path to the power transmission module 1200 . Specifically, the power control apparatus 1000 may transmit a signal for changing the position (or posture) of the power transmission module 1200 . For example, the power control apparatus 1000 may adjust the position of the power transmission module 1200 so that alignment between the power transmission module 1200 and the receiving device 20 corresponds. In an embodiment, the power control apparatus 1000 and the power transmission module 1200 may be provided as one integrated module.

According to various embodiments, the sensing device 2000 may determine the location of the object in the wireless power environment 10 . According to an embodiment, the sensing device 2000 may acquire information about an object in the wireless power environment 10 . As an example, the sensing apparatus 2000 may include an imaging device. As a specific example, the imaging device may be a camera. However, the spirit of the present disclosure is not limited thereto, and the sensing device 2000 may include various sensors capable of determining the position of an object in the wireless power environment 10 . However, for convenience of description, in the following description of the present disclosure, in order to acquire information about an object in the wireless power environment 10 , the sensing device 2000 including a camera will be mainly described. In an embodiment, the sensing device 2000 may determine information about an object based on image information in a wireless power environment acquired through a camera. Here, as described above, the sensing device 2000 may determine information about the object using an artificial neural network.

3 is a block diagram illustrating a power control device according to various embodiments. 4 is a block diagram illustrating a sensing device according to various embodiments.

Referring to FIG. 3 , the power control apparatus 1000 may include a first processor 1001 , a first memory 1060 , and a first communication module 1080 . For the power control device 1000 of FIG. 3 , the description of the power control device 1000 of FIGS. 1 and 2 may be applied mutatis mutandis.

According to various embodiments, the first communication module 1080 may communicate with an external device. The power control device 1000 may transmit/receive data to/from the sensing device 2000 or an external server through the first communication module 1080 . For example, the power control apparatus 1000 may receive information about an object in the wireless power environment 10 through the first communication module 1080 .

The first communication module 1080 is largely divided into a wired type and a wireless type. Since the wired type and the wireless type have their respective strengths and weaknesses, in some cases, the wired type and the wireless type may be simultaneously provided in the power control apparatus 1000 .

Here, in the case of the wired type, LAN (Local Area Network) or USB (Universal Serial Bus) communication is a representative example, and other methods are also possible. In addition, in the case of the wireless type, a communication method of a Wireless Personal Area Network (WPAN) series such as Bluetooth or Zigbee may be mainly used. However, since the wireless communication protocol is not limited thereto, the wireless communication module may use a wireless local area network (WLAN)-based communication method such as Wi-Fi or other known communication methods.

The first memory 1060 may store various types of information. Various data may be temporarily or semi-permanently stored in the first memory 1060 . Examples of the first memory 1060 include a hard disk (HDD), a solid state drive (SSD), a flash memory, a read-only memory (ROM), and a random access memory (RAM). ), and so on. The first memory 1060 may be provided in a form embedded in the power control device 1000 or in a detachable form.

The first memory 1060 includes an operating system (OS) for driving the power control device 1000 or a program for operating each component of the power control device 1000 , and an operation of the power control device 1000 . Various data necessary for the . For example, the first memory 1060 may store parameter data related to an electrical signal or wireless power generated based on information about an object detected by the sensing device 2000 .

The first processor 1001 may control the overall operation of the power control apparatus 1000 . For example, the first processor 1001 loads and executes a program for the operation of the sensing device 2000 from the first memory 1060 , or controls wireless power transmission from the power transmission module 1200 . A control signal may be generated or a control signal for adjusting alignment between the power transmission module 1200 and the reception device 20 may be generated.

The first processor 1001 may be implemented as a central processing unit (CPU) or a similar device according to hardware, software, or a combination thereof. It may be provided in the form of an electronic circuit that performs a control function by processing electrical signals in hardware, and may be provided in the form of a program or code for driving a hardware circuit in software.

The power transmission module 1020 may be integrated into the power control device 1000 or provided as a separate component. The power transmission module 1020 may include an antenna for wireless power radiation.

Referring to FIG. 4 , the sensing device 2000 may include a second processor 2001 , a second memory 2060 , a second communication module 2080 , and an image sensor 2020 . For the sensing device 2000 of FIG. 4 , the description of the sensing device 2000 of FIGS. 1 and 2 may be applied mutatis mutandis.

According to various embodiments, the second communication module 2080 may communicate with an external device. The sensing device 2000 may transmit/receive data to and from the power control device 1000 or an external server through the second communication module 1080 . For the description of the second communication module 2080 , all or part of the description of the first communication module 1080 may be applied mutatis mutandis, and thus the redundant description will be omitted.

The second memory 2060 may store various types of information. The second memory 2060 includes an operating system (OS) for driving the sensing device 2000 and a program for operating each component of the sensing device 2000 , and various types of operations necessary for the sensing device 2000 . Data may be stored. For example, an algorithm capable of determining the existence of an object based on an image in the wireless power environment 10 obtained by the image sensor 2020 may be stored in the second memory 2060 . As another example, an algorithm for determining location information of an object based on information obtained from the image sensor 2020 may be stored in the second memory 2060 . All or part of the description of the second memory 2060 may be applied mutatis mutandis to the description of the first memory 1060 .

The second processor 2001 may control the overall operation of the sensing device 2000 . For example, the second processor 2001 loads and executes a program for operation of the image sensor 2020 from the second memory 2060 or executes a program for analyzing image information obtained from the image sensor 2020 You can load it and run it. All or part of the description of the second processor 2001 may be applied mutatis mutandis to the description of the first processor 1001 .

In the following description of the present disclosure, a wireless power transmission method provided by the above-described wireless power transmission system 100 will be described.

5 is a flowchart schematically illustrating a wireless power transmission method according to various embodiments. In the following description of the present disclosure, each configuration of the wireless power transmission system 100 described above in FIGS. 1 to 4 may be cited.

Referring to FIG. 5 , the wireless power transmission method according to various embodiments includes determining a location of a receiving device ( S1000 ), setting a wireless power transmission protocol ( S2000 ), and transmitting wireless power ( S3000 ). may include

According to various embodiments, the wireless power transmission system 100 may determine the location of the receiving device in the wireless power environment 10 ( S1000 ). Specifically, the sensing device 2000 acquires image information of the wireless power environment 10 using the image sensor 2020, and the second processor 2001 receives the device 20 based on the acquired image information. position can be determined. Here, details of a process in which the sensing device 2000 determines the location of the receiving device 20 will be described later in detail.

According to various embodiments, the wireless power transmission system 100 may set a wireless power transmission protocol ( S2000 ). Specifically, the power control apparatus 1000 may set various wireless power transmission protocols based on the location of the receiving device 20 . For example, the power control apparatus 1000 may adjust the position of the power transmission module 1200 in order to adjust the alignment between the power transmission module 1200 and the receiving device 20 . As another example, when an object between the power transmitting module 1200 and the receiving device 20 is detected, the power control apparatus 1000 may stop transmitting wireless power. This will also be described later in detail.

According to various embodiments, the wireless power transmission system 100 may transmit wireless power. Specifically, the power control apparatus 1000 may transmit a control signal for wireless power transmission to the power transmission module 1200 for wireless power transmission to the receiving device 20 .

6 is a flowchart illustrating an embodiment of a method for determining a location of a receiving device according to various embodiments of the present disclosure; 7 is a diagram illustrating a process of determining an object in an image according to various embodiments of the present disclosure; 8 is a diagram illustrating a method of calculating a three-dimensional position in an image according to various embodiments of the present disclosure; 9 shows an example of a wireless power environment represented by three-dimensional coordinates.

Referring to FIG. 6 , the method for determining the location of the receiving device includes the steps of obtaining image information in a wireless power environment (S1202), determining an object in the obtained image (S1204), and determining a three-dimensional position of the receiving device (S1206) may be included.

According to various embodiments, the wireless power transmission system 100 may acquire image information in the wireless power environment 10 ( S1202 ). Specifically, at least one or more sensing devices 2000 may acquire image information in the wireless power environment 10 through each image sensor 2020 . When there are a plurality of sensing devices 2000 , image information in the wireless power environment 10 photographed from various angles may be acquired.

According to various embodiments, the wireless power transmission system 100 may determine the existence of an object based on the acquired image(s) (S1204). Specifically, the sensing device 2000 may analyze image information obtained from the image sensor 2020 using the second processor 2001 and obtain information about an object in the image. For example, the sensing device 2000 may analyze the image to identify the receiving device 20 as a target for wireless power transmission. As another example, the sensing device 2000 may analyze the image to identify objects that interfere with wireless power transmission in the wireless power environment 10 . As another example, the sensing device 2000 may analyze the image to identify an object (eg, a person or an animal) that may be exposed to a risk during wireless power transmission.

Referring to FIG. 7 , the sensing device 2000 may determine an object in an image by using various artificial neural network algorithms for image analysis.

According to various embodiments, the sensing device 2000 may analyze an image and identify an object using a sufficiently trained convolutional neural network (CNN).

As an example (referring to (a) of FIG. 7 ), the sensing apparatus 2000 may determine an object in an image and obtain information about coordinates of an area (boundary box) determined to be an object.

As another example (referring to (b) of FIG. 7 ), the sensing device 2000 may analyze pixels included in an image and obtain classification information in units of pixels. Specifically, the sensing device 2000 assigns a labeling value to pixels included in an image using an artificial neural network, and specifies a region in the image formed by a set of pixels to which corresponding labeling values are specified. It can be judged as an object.

As another example (referring to (c) of FIG. 7 ), the sensing device 2000 may determine an object by using key point information in the image. For example, the sensing device 2000 may identify information such as a specific part (eg, a person's wrist) of the object in the image, and determine the object in the image based on the identification information.

However, the spirit of the present document is not limited to the above-described embodiments to be interpreted. In addition, it will be understood that various methods for determining an object based on an image (or other information obtainable within a wireless power environment) may be applied.

Referring back to FIG. 6 , the sensing device 2000 may determine the three-dimensional position of the object ( S1206 ). Specifically, the sensing apparatus 2000 may determine object information in a plurality of acquired images and determine a three-dimensional position of the object. For example, the sensing device 2000 may acquire the 3D coordinates of the object by considering the previously obtained location information of the image sensor (camera, 2020) and information about the object in the image. Here, the sensing device 2000 may use a coordinate system transformation method in the image, such as tsai calibration (refer to FIG. 8 ) or zhang calibration. However, this is an example, and it will be understood that three-dimensional coordinate information for an object in an image may be obtained using another method. All operations (eg, object identification and/or position determination of the receiving device 20 ) performed by the sensing device 2000 to be described above or to be described later may be performed by the power control device 1000 . That is, the sensing device 2000 transmits the image analysis result in the wireless power environment 10 to the power control device 1000 , and the power control device 1000 determines the location information of the object or the receiving device 20 . may be

Referring to FIG. 9 , the sensing device 2000 builds a three-dimensional coordinate system in the wireless power environment 10 , and considers the location of the image sensor 2020 (camera) and object information in the image, the receiving device ( 20) or the positions of other objects may be determined. In addition, the sensing device 2000 (or the power control device 1000 ) from this also considers the previously acquired location information of the power transmission module 1200 , and receives the device 20 from the power transmission module 1200 . It is possible to determine a wireless power transmission path therebetween, and location information about other objects located between the wireless power transmission paths may also be determined.

Referring back to FIG. 9 , the wireless power transmission system 100 may include first to fourth sensing devices 2000-1 to 2000-4. Here, as described above, each of the sensing devices 2000-1 to 2000-4 may individually include a processor 2001 (refer to FIG. 4) and an image sensor 2020 (refer to FIG. 4). Each of the sensing devices 2000-1 to 2000-4 may individually analyze image information in the wireless power environment 10 and determine information about an object or the receiving device 20 in the wireless power environment 10 . have. As the image information in the wireless power environment 10 analyzed by the plurality of sensing devices 2000-1 to 2000-4, respectively, is transmitted to the power control device 1000, the amount of computation of the power control device 1000 may be reduced. Also, the power efficiency of the power transmission system 100 may increase. Also, it is possible to easily expand or reduce the number of the sensing devices 2000-1 to 2000-4.

According to various embodiments, the power control apparatus 1000 may determine the location of an object or the receiving device 20 based on a plurality of image information acquired by the plurality of sensing devices 2000-1 to 2000-4. can Here, information on the positions ((X1, Y1, Z1) to (X4, Y4, Z4)) of each of the first to fourth sensing devices 2000-1 to 2000-4 is the above-described first memory 1080 can be saved in advance. In addition, information on the location information (x0, y0, z0) of the power transmission module 1200 may also be stored in advance in the first memory 1080. Specifically, the power control device 1000 includes image information on the object or the receiving device 20 identified by the first to fourth sensing devices 2000-1 to 2000-4, and the first to fourth sensing devices. (2000-1 ~ 2000-4) Based on each position information ((X1, Y1, Z1) ~ (X4, Y4, Z4)), three-dimensional position information (Xr, yr) of the object or the receiving device 20 , zr) can be determined.

In addition, according to an embodiment, the power control device 1000 may include the three-dimensional position information Xr of the object or the receiving device 20 based on information obtained from all of the plurality of sensing devices 2000-1 to 2000-4. , yr, zr) may be obtained, and based on information obtained from some sensing devices (eg, the second sensing device 2000-2 and/or the third sensing device 2000-3), an object or reception 3D location information (Xr, yr, zr) of the device 20 may be acquired.

10 is a flowchart illustrating a method of setting a power transmission direction according to various embodiments. 11 is a diagram illustrating a change in a location of a wireless power transmission module according to various embodiments of the present disclosure;

10 and 11 , the method of setting the power transmission direction includes transmitting test power and a test message (S2202), determining whether the received power is received above a threshold value (S2204), and transmitting power It may include changing the location of the module (S2204).

According to various embodiments, the wireless power transmission system 100 may transmit test power and a test message (S2202). Specifically, the power control apparatus 1000 may transmit a control signal for transmitting the test power and the test message 2202 to the receiving device 20 to the power transmission module 1200 . Here, the test message may include information about the amount of test power transmitted from the power transmission module 1200 .

According to various embodiments, the wireless power transmission system 100 receives test power and a response to the test message from the receiving device 20 , and based on this, the test power received from the receiving device 20 is greater than or equal to a threshold value It can be determined whether it is recognized (S2204). Specifically, the receiving device 20 transmits a response message including strength (or magnitude) information of the wireless power received from the power transmission module 1200 to the power transmission module 1200, and the power control device 1000 The wireless power (hereinafter, first power) transmitted from the power transmission module 1200 may be compared with the wireless power (hereinafter, second power) received by the receiving device 20 .

For example, if the difference between the first power and the second power is less than a threshold value, the power control apparatus 1000 may determine that the alignment between the power transmission module 1200 and the reception device 20 is appropriate. On the other hand, if the difference between the first power and the second power is equal to or greater than the threshold value, the power control apparatus 1000 determines that the alignment between the power transmission module 1200 and the reception device 20 is inadequate, and the power transmission module 1200 ) can change its posture or position. As another example, when the difference between the first power and the second power is equal to or greater than a threshold value, the power control apparatus 1000 may determine that an object exists between the power transmission module 1200 and the reception device 20 . Exemplarily, only the difference between the first power and the second power has been described, but the power control apparatus 1000, based on the ratio of the first power and the second power, the receiving device 20 and the power transmission module 1200 ), or whether an object exists in the power transmission path can be determined.

It will be described as a specific example with reference to FIG. 11 .

In an embodiment, the power control apparatus 1000 may change the posture of the power transmission module 1200 . Specifically, the power control apparatus 1000 may rotate the power transmission module 1200 to align with the receiving device 20 . For example, the power transmission module 1200 may be rotated in an x-axis direction, a y-axis direction, and/or a z-axis direction within a three-dimensional coordinate system for wireless power transmission. In other words, it can be expressed that the power transmission module 1200 can perform roll, pitch, and yaw motions.

As a specific example, referring to FIG. 12 , in an initial state, the power transmission module 1200 may transmit a wireless signal toward (xi, 0, zi) coordinates in a three-dimensional coordinate system. In this case, due to a difference between the (xr, yr, zr) coordinates at which the receiving device 20 is located and the y-axis direction, the amount of wireless power received by the receiving device 20 may be weakened.

The receiving device 20 may receive wireless power of a weaker strength than the above-described test power, and transmit information (response message) about the received wireless power to the power transmission module 1200 . Here, the response message may include information on an alignment angle difference between the power transmission module 1200 and the receiving device 20 or an angle at which the power transmission module 1200 should rotate. Also, here, the power control device 1000 analyzes the response message of the receiving device 20 and, if it is determined that the difference between the first power and the second power described above is equal to or greater than a threshold value, the power transmission module 1200 is set to the y-axis direction can be rotated. By rotating the power transmission module 1200 in the y-axis direction (centered on the z-axis), the power transmission module 1200 wirelessly transmits power toward (xr, yr, zr), which is the coordinate of the receiving device 20 . have. In an embodiment, the test message (and/or test power) and the response message can be repeatedly transmitted/received over a plurality of times, and through this, the power control device 1000 gradually rotates the power transmission module 1200 . Thus, the power transmission module 1200 and the receiving device 20 may be aligned. For example, transmission/reception of the test message and the response message may be continued until a difference (or ratio) between the first power and the second power becomes less than a threshold value.

12 is a flowchart illustrating a method of determining whether to transmit power according to various embodiments of the present disclosure. 13 is a diagram illustrating an example of determining whether to transmit power according to various embodiments of the present disclosure;

12 , the method of determining whether to transmit power includes determining a power transmission path (S2402), determining the presence of an object in the power transmission path (S2404), and determining whether to transmit power (S2406) may include

According to various embodiments, the wireless power transmission system 100 may determine a transmission path of wireless power (S2402). Specifically, the power control apparatus 1000 may determine a wireless power transmission path from the power transmission module 1200 to the reception device 20 based on the three-dimensional position of the reception device 20 determined as described above. can

In one embodiment, the wireless power transmission system 100 may determine the focusing area (F). Here, the focusing area F may mean an area in which wireless power is concentrated among paths through which wireless power is transmitted from the power transmission module 1200 to the receiving device 20 . For example, the intensity of wireless power may increase within the focusing area F, and exposure to wireless power within the focusing area F may have a detrimental effect on an object (eg, a person).

According to various embodiments, the wireless power transmission system 100 may determine whether an object exists in the wireless power transmission path (S2404). Specifically, the power control apparatus 1000 may determine whether an object exists in the wireless power transmission path based on the location information of the object in the wireless power environment 10 obtained from the sensing device 2000 . In an embodiment, the power control apparatus 1000 may determine whether an object exists in the focusing area F. Also, the power control apparatus 1000 may determine whether the object in the focusing area F is a living organism or an object.

According to various embodiments, the wireless power transmission system 100 may determine whether to transmit wireless power according to whether an object exists in the wireless power transmission path ( S2406 ). Specifically, when the object is located in the wireless power transmission path, the power control apparatus 1000 may stop transmitting the wireless power. For example, when an organism (eg, a person) is present in the focusing area F, the power control apparatus 1000 may stop transmitting wireless power or may not transmit wireless power from the beginning.

It will be described by way of example with reference to FIG. 13 .

Referring to FIG. 13 , the power control apparatus 1000 may determine whether an object exists in a power transmission path. Here, the position of the object may be acquired by image information acquired by the sensing device 2000 as described above. Also, here, the power transmission path may be defined as an area formed from the position (x0, y0, z0) of the power transmission module 1200 to the position (xr, yr, zr) of the receiving device 20 . Also, the focusing area F may refer to a partial area in which the magnitude of wireless power is strongly measured within the above-described power transmission path.

As shown in FIG. 13 , when a person is located in the power transmission path (particularly, the focusing area F), it may have a detrimental effect on the human body. In this case, the power control apparatus 1000 may stop the transmission of wireless power or control the power transmission module 1200 so as not to transmit wireless power from the beginning, thereby preventing a risk that may be applied to the object by the wireless power. have.

Referring to FIG. 14 , the method of stopping power transmission may include determining whether an abnormal operation is performed ( S2602 ) and stopping power transmission ( S2604 ).

According to various embodiments, the wireless power transmission system 100 may detect an abnormal operation occurring in the receiving device 20 or the power transmission module 1200 ( S2602 ). Specifically, the power control apparatus 1000 may detect an abnormal operation such as overcurrent, overvoltage, or overheat generated in the power transmission module 1200 or the reception device 20 . For example, the power control device 1000 detects an abnormal operation by monitoring the state of the power transmission module 1200 , or detects an abnormal operation of the receiving device 20 through an error message obtained from the receiving device 20 . can detect

According to various embodiments, the wireless power transmission system 100 may stop power transmission when an abnormal operation is detected. Specifically, the power control apparatus 1000 may detect an abnormal operation of the receiving device 20 or the power transmission module 1200 , and may stop wireless power transmission based thereon.

According to various embodiments of the present disclosure, a power control device including a first processor; a plurality of sensing devices connected to the power control device by wire or wirelessly and including an image sensor and a second processor; and a power transmission module connected to the power control device to radiate power wirelessly, wherein the sensing device acquires image data near the wireless power transmission system to identify a receiving device in the image data, and the power The control device may be provided with a wireless power transmission system that determines a three-dimensional position of the identified receiving device and generates a control signal for wireless power transmission to the power transmission module based on the three-dimensional position of the receiving device. can

In addition, the sensing device may be provided with a wireless power transmission system for identifying a receiving device in the image data using a sufficiently trained artificial neural network.

In addition, the power control device provides a wireless power transmission system that determines a power transmission path from the power transmission module to the receiving device in consideration of the 3D position of the power transmission module and the 3D position of the receiving device can be

In addition, the sensing device identifies an object in the image data, and when it is determined that an object exists in the power transmission path, the power control device transmits a control signal for stopping wireless power transmission to the power transmission module. A power transmission system may be provided.

In addition, the power control device transmits the first power to the receiving device through the power transmission module,

A wireless power transmission system that receives information about the second power from the receiving device, and generates a control signal for changing the position of the power transmission module when the difference between the first power and the second power is greater than or equal to a threshold value can be provided.

In addition, the power control device may be provided with a wireless power transmission system that detects whether the power transmission module operates abnormally, and generates a control signal for stopping wireless power transmission when the abnormal operation is detected.

According to various embodiments of the present disclosure, there is provided a power transmission control method using a wireless power transmission system, the method comprising: acquiring image data near the wireless power transmission system; identifying a receiving device in the image data using an artificial neural network; obtaining three-dimensional position information of the receiving device based on the identified receiving device and the previously obtained position information of the sensing module; determining a wireless power transmission path based on the 3D location information of the receiving device; and transmitting power wirelessly to the receiving device.

In addition, using an artificial neural network to identify the object in the image data; and determining whether an object exists in the wireless power transmission path; may be provided.

In addition, if an object exists in the wireless power transmission path, stopping the transmission of the wireless power; may be provided a power transmission control method further comprising.

In addition, transmitting the first power to the receiving device; and receiving a response message including information related to the second power corresponding to the first power from the receiving device.

In addition, if the difference between the first power and the second power is equal to or greater than a threshold value, changing the location of the power transmission module may be provided.

All operations performed by each component of the system 100 according to the above-mentioned embodiments may be performed independently or in combination, and the subject performing the operation may be changed.

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 in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. 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 available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As mentioned above, although specific embodiments have been described in the detailed description of this document, it will be apparent to those of ordinary skill in the art that various modifications are possible without departing from the scope of the present invention.

Claims

In the wireless power transmission system,

a power control device including a first processor;

a plurality of sensing devices connected to the power control device by wire or wirelessly and including an image sensor and a second processor; and

Including; a power transmission module connected to the power control device to radiate wireless power;

The sensing device acquires image data near the wireless power transmission system to identify a receiving device in the image data,

The power control device,

Determining the three-dimensional position of the identified receiving device,

A wireless power transmission system for generating a control signal for wireless power transmission to the power transmission module based on a three-dimensional position of the receiving device.
According to claim 1,

The sensing device is a wireless power transmission system for identifying a receiving device in the image data using a sufficiently trained artificial neural network.
According to claim 1,

The power control device,

A wireless power transmission system for determining a power transmission path from the power transmission module to the reception device in consideration of the 3D position of the power transmission module and the 3D position of the receiving device.
3. The method of claim 2,

the sensing device identifies an object in the image data;

When it is determined that an object exists in the power transmission path, the power control device transmits a control signal for stopping wireless power transmission to the power transmission module.
According to claim 1,

The power control device,

Transmitting the first power to the receiving device through the power transmission module,

Receiving information about the second power from the receiving device,

When the difference between the first power and the second power is equal to or greater than a threshold, the wireless power transmission system generates a control signal for changing the position of the power transmission module.
According to claim 1,

The power control device,

detecting whether the power transmission module operates abnormally,

When the abnormal operation is detected, the wireless power transmission system generates a control signal to stop wireless power transmission.
In the power transmission control method using a wireless power transmission system,

acquiring image data near the wireless power transmission system;

identifying a receiving device in the image data using an artificial neural network;

obtaining three-dimensional location information of the receiving device based on the identified receiving device and the pre-obtained location information of the sensing module;

determining a wireless power transmission path based on the 3D location information of the receiving device; and

Including; transmitting power wirelessly to the receiving device.

Power transmission control method.
8. The method of claim 7,

identifying an object in the image data using an artificial neural network; and

Determining whether an object exists in the wireless power transmission path; further comprising

Power transmission control method.
9. The method of claim 8,

When an object exists in the wireless power transmission path, stopping the transmission of the wireless power; Power transmission control method further comprising a.
8. The method of claim 7,

transmitting first power to the receiving device; and

Receiving a response message including information related to the second power corresponding to the first power from the receiving device; further comprising

Power transmission control method.
11. The method of claim 10,

When the difference between the first power and the second power is equal to or greater than a threshold value, changing the location of the power transmission module; and a power transmission control method.
12. A non-transitory electronic recording medium on which the method of any one of claims 7 to 11 is recorded.