KR102500499B1 - Wireless power transmitter and method for controlling thereof - Google Patents

Abstract

A wireless power transmission apparatus for wirelessly transmitting power to an electronic device according to various embodiments includes a power transmission antenna including a plurality of patch antennas for wireless power transmission, a sensor, and a processor, the processor comprising: The sensor generates and stores a first clutter map representing reflection characteristics of objects located in the vicinity of the wireless power transmitter at least based on first data acquired during a first period, and the sensor generates and stores a first clutter map for a second period A second clutter map corresponding to the second period is obtained based on the comparison result by comparing the difference between the second data obtained during the period and the first clutter map with the data included in the first clutter map. generates an RF wave that determines the location of the body using the second data and the second clutter map, and charges the electronic device without generating an RF wave larger than a specified size at the location of the body. It can be set to control the antenna for power transmission to form.

Description

Wireless power transmission device and control method thereof {WIRELESS POWER TRANSMITTER AND METHOD FOR CONTROLLING THEREOF}

Various embodiments relate to a wireless power transmission device and a control method thereof, and more particularly, to a wireless power transmission device capable of wirelessly transmitting power to an electronic device and a control method thereof.

For many people living in modern times, portable digital communication devices have become an essential element. Consumers want to be provided with a variety of high-quality services anytime, anywhere. In addition, due to the recent development of IoT (Internet of Thing) technology, various sensors, home appliances, and communication devices that exist in our lives are being networked into one. In order to smoothly operate these various sensors, a wireless power transmission system is required.

Wireless power transmission includes magnetic induction, magnetic resonance, and electromagnetic wave methods, and among them, the electromagnetic wave method has the advantage of being more advantageous in long-distance power transmission than other methods.

After determining the location of a charging target, eg, an electronic device, the electromagnetic wave type wireless power transmission device may form a radio frequency (RF) wave toward the location. The wireless power transmission device may form an RF wave having a relatively high frequency (eg, 5.8 GHz). In addition, the wireless power transmission device may form a relatively large RF wave for long-distance charging. If a living body such as a human or animal is located around the wireless power transmission device, RF waves may be applied to the living body. RF waves can be harmful to living organisms.

In various embodiments, the location of the body is determined by comparing a received signal with a clutter map updated every cycle, so that a relatively large RF wave is not applied to the determined location of the body. It is possible to provide a controllable wireless power transmission device and its operating method.

According to various embodiments, a wireless power transmission apparatus for wirelessly transmitting power to an electronic device includes a power transmission antenna including a plurality of patch antennas for wireless power transmission, a sensor, and a processor, wherein the processor comprises: , Based on at least the first data acquired by the sensor during a first period, a first clutter map representing reflection characteristics of an object located around the wireless power transmitter is generated and stored, and the sensor generates and stores a second clutter map. A difference between the second data obtained during the period and the first clutter map is compared with the data included in the first clutter map, and based on the comparison result, a second clutter corresponding to the second period is obtained. An RF that generates a map, determines the location of the body using the second data and the second clutter map, and charges the electronic device without generating an RF wave larger than a specified size at the location of the body It may be set to control the antenna for power transmission to form a wave.

According to various embodiments, a method of operating a wireless power transmitter that wirelessly transmits power to an electronic device may include determining an object located around the wireless power transmitter based on at least first data obtained during a first period. An operation of generating and storing a first clutter map representing reflection characteristics, comparing a difference between second data acquired during a second period and the first clutter map with data included in the first clutter map, , an operation of generating a second clutter map corresponding to the second period based on the comparison result, an operation of determining a location of the body using the second data and the second clutter map, and an operation of determining the location of the body, and the body It may include an operation of forming an RF wave that charges the electronic device while not forming an RF wave having a size greater than or equal to a specified size at a position of the .

According to various embodiments, a position measuring device for measuring a position of a target includes a first antenna set to transmit a first transmission signal and a second antenna set to receive a first received signal formed by reflection of the first transmission signal. An antenna and a processor, wherein the processor comprises: a first clutter representing reflection characteristics of an object located in the vicinity of the position measuring device, based on at least first data acquired during a first period through the second antenna; A clutter map is generated and stored, and a difference between second data obtained for a second period through the second antenna and the first clutter map is compared with data included in the first clutter map, Based on the comparison result, a second clutter map corresponding to the second period may be generated, and the location of the target may be determined using the second data and the second clutter map.

According to various embodiments of the present disclosure, a method of operating a location measurement device for measuring a location of a target may include a first method representing reflection characteristics of an object located around the location measurement device based on at least first data obtained during a first period. Generating 1 clutter map, comparing the difference between second data obtained during a second period through the second antenna and the first clutter map with data included in the first clutter map, generating a second clutter map corresponding to the second period based on the comparison result, and determining a position of the target using the second data and the second clutter map. can

According to various embodiments, the position of a living body is determined by comparing a received signal with a clutter map updated every cycle, and an RF wave having a relatively large size is not applied to the determined position of the living body. A wireless power transmission device and an operating method thereof capable of being controlled so as not to occur may be provided.

1 shows a conceptual diagram of a wireless power transmission system according to various embodiments of the present invention.
2 is a flowchart illustrating an operating method of a wireless power transmission apparatus according to various embodiments.
3 shows a block diagram of a wireless power transmission device according to various embodiments.
4 is a diagram of a position measuring device according to various embodiments.
5 is a flowchart illustrating an operating method of a location measuring device using a clutter map according to various embodiments of the present disclosure.
6 is a flowchart illustrating a method of operating a position measuring device according to various embodiments of the present disclosure.
7 is a flowchart illustrating an operating method of a position measuring device according to various embodiments.
8A is a graph of signal magnitude versus time index of a transmitted pulse signal.
8B is a graph of power spectrum versus frequency index of a bandpass filter.
9A is data about distances according to a plurality of received signal indices obtained by a position measuring device according to various embodiments.
9B is data about distances according to a plurality of received signal indices acquired by a position measuring device according to various embodiments.
10A is data about the location of a target obtained by a location measuring device according to various embodiments.
10B is data about the location of a target acquired by a location measuring device according to various embodiments.
11A is data about the location of a target acquired by a location measuring device according to various embodiments.
11B is data about the location of a target acquired by a location measuring device according to various embodiments.

Hereinafter, various embodiments of this document will be described with reference to the accompanying drawings. Examples and terms used therein are not intended to limit the technology described in this document to specific embodiments, and should be understood to include various modifications, equivalents, and/or substitutes of the embodiments. In connection with the description of the drawings, like reference numerals may be used for like elements. Singular expressions may include plural expressions unless the context clearly dictates otherwise. In this document, expressions such as "A or B" or "at least one of A and/or B" may include all possible combinations of the items listed together. Expressions such as "first," "second," "first," or "second," may modify the corresponding components regardless of order or importance, and are used to distinguish one component from another. It is used only and does not limit the corresponding components. When a (e.g., first) element is referred to as being "(functionally or communicatively) coupled to" or "connected to" another (e.g., second) element, that element refers to the other (e.g., second) element. It may be directly connected to the component or connected through another component (eg, a third component).

In this document, "configured (or configured to)" means "suitable for," "having the ability to," "changed to," depending on the situation, for example, hardware or software. ," can be used interchangeably with "made to," "capable of," or "designed to." In some contexts, the expression "device configured to" can mean that the device is "capable of" in conjunction with other devices or components. For example, the phrase "a processor configured (or configured) to perform A, B, and C" may include a dedicated processor (eg, embedded processor) to perform the operation, or by executing one or more software programs stored in a memory device. , may mean a general-purpose processor (eg, CPU or application processor) capable of performing corresponding operations.

A wireless power transmission device or electronic device according to various embodiments of the present document, for example, a smart phone, a tablet PC, a mobile phone, a video phone, an e-book reader, a desktop PC, a laptop PC, a netbook computer, a workstation, It may include at least one of a server, a PDA, a portable multimedia player (PMP), an MP3 player, a medical device, a camera, or a wearable device. Wearable devices can be accessories (e.g. watches, rings, bracelets, anklets, necklaces, glasses, contact lenses) or head-mounted-devices (HMDs), integrated into textiles or clothing (e.g. electronic garments); It may include at least one of a body-attachable circuit (eg, a skin pad) or a bio-implantable circuit. In some embodiments, the wireless power transmission device or electronic device is, for example, a television, a digital video disk (DVD) player, an audio device, a refrigerator, an air conditioner, a vacuum cleaner, an oven, a microwave oven, a washing machine, an air purifier, a set top box, It may include at least one of a home automation control panel, a security control panel, a media box, a game console, an electronic dictionary, an electronic key, a camcorder, or an electronic photo frame.

In another embodiment, the wireless power transmission device or electronic device is a variety of medical devices (e.g., various portable medical measuring devices (glucose meter, heart rate monitor, blood pressure monitor, or body temperature monitor, etc.), MRA (magnetic resonance angiography), MRI ( magnetic resonance imaging), CT (computed tomography), camera, or ultrasonicator, etc.), navigation device, GNSS (global navigation satellite system), EDR (event data recorder), FDR (flight data recorder), automotive infotainment devices, marine electronics (e.g. marine navigation systems, gyrocompasses, etc.), avionics, security devices, vehicle head units, industrial or domestic robots, drones, ATMs of financial institutions, Including at least one of a point of sale (POS) in a store or Internet of Things (e.g., light bulbs, various sensors, sprinklers, smoke alarms, thermostats, streetlights, toasters, exercise equipment, hot water tanks, heaters, boilers, etc.) can do. According to some embodiments, the wireless power transmission device or electronic device may be a piece of furniture, a building/structure or a vehicle, an electronic board, an electronic signature receiving device, a projector, or various measuring devices (eg : Water, electricity, gas, or radio wave measuring devices, etc.) may include at least one. In various embodiments, the wireless power transmission device or electronic device may be flexible or may be a combination of two or more of the various devices described above. A wireless power transmission device or electronic device according to an embodiment of the present document is not limited to the above devices. In this document, the term user may refer to a person using an electronic device, a wireless power transmission device, or a device using an electronic device (eg, an artificial intelligence electronic device).

1 shows a conceptual diagram of a wireless power transmission system according to various embodiments of the present invention.

The wireless power transmitter 100 may wirelessly transmit power to at least one electronic device 150 or 160 . In this document, the wireless power transmitter 100 or the electronic device 150 performing a specific operation means that, for example, a processor included in the wireless power transmitter 100 or the electronic device 150 performs a specific operation. It may mean performing or controlling other hardware to perform a specific operation. Alternatively, the wireless power transmitter 100 or the electronic device 150 performing a specific operation is, for example, at least one command stored in a memory included in the wireless power transmitter 100 or the electronic device 150. As it is executed, it may mean that the processor performs a specific operation or controls other hardware to perform a specific operation. In various embodiments, the wireless power transmission apparatus 100 may include a plurality of patch antennas 111 to 126. The patch antennas 111 to 126 are not limited as long as each antenna can generate an RF wave. At least one of the amplitude and phase of the RF wave generated by the patch antennas 111 to 126 may be adjusted by the wireless power transmitter 100 . For convenience of explanation, RF waves generated by each of the patch antennas 111 to 126 are referred to as sub-RF waves.

In various embodiments of the present invention, the wireless power transmitter 100 may adjust at least one of an amplitude or a phase of each sub RF wave generated by the patch antennas 111 to 126 . Meanwhile, sub RF waves may interfere with each other. For example, sub-RF waves may constructively interfere with each other at one point, and sub-RF waves may destructively interfere with each other at another point. The wireless power transmitter 100 according to various embodiments of the present invention includes sub-RFs generated by patch antennas 111 to 126 so that sub-RF waves constructively interfere with each other at a first point (x1, y1, z1). At least one of the amplitude or phase of each wave may be adjusted.

For example, the wireless power transmitter 100 may determine that the electronic device 150 is disposed at the first point (x1, y1, z1). Here, the location of the electronic device 150 may be, for example, a point where an antenna for receiving power of the electronic device 150 is located. A configuration in which the wireless power transmitter 100 determines the position of the electronic device 150 will be described in more detail below. In order for the electronic device 150 to wirelessly receive power with high transmission efficiency, sub-RF waves must constructively interfere at the first point (x1, y1, z1). Accordingly, the wireless power transmitter 100 may control the patch antennas 111 to 126 so that the sub-RF waves constructively interfere with each other at the first point (x1, y1, z1). Here, controlling the patch antennas 111 to 126 means controlling the amplitude of signals input to the patch antennas 111 to 126 or controlling the phase (or delay) of signals input to the patch antennas 111 to 126. It can mean to control. Meanwhile, those skilled in the art will be able to easily understand beam forming, which is a technique of controlling RF waves to constructively interfere at a specific point. In addition, there is no limitation on the type of beam-forming used in the present invention, and those skilled in the art will easily understand. For example, as disclosed in US Patent Publication 2016/0099611, US Patent Publication 2016/0099755, US Patent Publication 2016/0100124, and the like, various beamforming methods may be used. A shape of an RF wave formed by beam-forming may be referred to as energy pockets.

Meanwhile, the wireless power transmitter 100 may detect that the electronic device 160 is disposed at the second point (x2, y2, z2). The wireless power transmitter 100 may control the patch antennas 111 to 126 so that the sub-RF waves become constructive interference at the second points (x2, y2, z2) to charge the electronic device 160. Accordingly, the RF wave 131 formed by the sub-RF waves can have a maximum amplitude at the second point (x2, y2, z2), and the electronic device 160 can receive wireless power with high transmission efficiency. can

As described above, the wireless power transmitter 100 determines the location of the electronic devices 150 and 160, and causes sub-RF waves to be constructive interference at the determined location, thereby performing wireless charging with high transmission efficiency. Meanwhile, the wireless power transmission apparatus 100 may perform wireless charging with high transmission efficiency only when the electronic devices 150 and 160 are accurately located.

2 is a flowchart illustrating an operating method of a wireless power transmission apparatus according to various embodiments.

According to various embodiments, in operation 201, the wireless power transmitter 100 may determine at least one of an electronic device (eg, the electronic device 150 or 160) or a body position. The wireless power transmitter 100 may determine the position of at least one of an electronic device or a living body based on at least data input from various sensors. According to an embodiment, the wireless power transmitter 100 may determine the location of at least one of an electronic device or a living body based on data acquired through at least one transceiver. The wireless power transmitter 100 may determine the location of the electronic device using one sensor and determine the location of the body using another sensor. For example, the electronic device may determine the location of the body based on data obtained through at least one transceiver. The wireless power transmitter 100 may generate a transmission wave through one transceiver and receive a reception wave corresponding thereto. The wireless power transmitter 100 may determine the position of the living body by analyzing the received wave measured over time. In this case, the wireless power transmitter 100 may perform a difference operation on a clutter map in a data map representing the magnitude of a received wave on the time axis, and determine the location of the body based on the result of the difference operation. The wireless power transmitter 100 may update the clutter map for each cycle based on the data of the received wave and the clutter map of the previous cycle. The wireless power transmitter 100 determines the location of the body using the updated clutter map and the data map associated with the received wave, so that the location of the body can be accurately determined. The process of determining the position using the clutter map and the data map and updating the clutter map will be described later in detail. The electronic device 101 may determine the location of the electronic device based on at least a communication signal received by the communication circuit. The wireless power transmitter 100 may include, for example, a communication circuit having a plurality of antennas (eg, an antenna array). The wireless power transmitter 100 may determine the location of the electronic device using at least one of a reception time of a communication signal from each of a plurality of antennas or a phase of the communication signal. Alternatively, the wireless power transmitter 100 may determine the distance between the wireless power transmitter 100 and the electronic device using the strength of the communication signal. For example, the communication signal may include information about the transmission strength of the communication signal, and the wireless power transmission apparatus 100 compares the transmission strength of the communication signal and the reception strength of the communication signal to the wireless power transmission apparatus ( 100) and the electronic device may determine a distance. Alternatively, the wireless power transmitter 100 may determine the distance between the wireless power transmitter 100 and the electronic device using the time of flight (TOF) of the communication signal. For example, the communication signal may include information about a transmission time point, and the wireless power transmission device 100 compares the reception time point of the communication signal and the transmission time point of the communication signal to determine the wireless power transmission device 100 and the electronic power transmission device 100. The distance between devices can be determined.

According to various embodiments, the wireless power transmitter 100 may include a radar type sensor. The wireless power transmitter 100 may generate a transmission wave through a sensor and may receive a reflected wave corresponding thereto. For example, an obstacle such as an electronic device or a human body may be located around the wireless power transmission device 100 . An obstacle may refer to an object that cannot form power using RF waves, or may refer to another electronic device not designated as a charging target. A transmitted wave generated from the sensor is reflected by an electronic device or an obstacle, thereby forming a reflected wave. Due to the reflection, at least one of the amplitude or phase of the transmission wave may be changed, and accordingly, at least one of the amplitude and phase of the reception wave may be different from at least one of the amplitude and phase of the transmission wave. The wireless power transmitter 100 may receive a reflected wave through a sensor and may determine at least one of an amplitude or a phase of the reflected wave. The sensor of the wireless power transmitter 100 may include a plurality of reception antennas, and in this case, reflected waves may be received by each of the plurality of reception antennas. In various embodiments, the reception antenna may be used for transmission of a transmission wave, or the wireless power transmission apparatus 100 may include a transmission antenna and a reception antenna physically distinct from the transmission antenna. Since the plurality of antennas for reception have physically different positions, at least one of an amplitude of a received wave, a reception time of a received wave, or a phase of a received wave may be different from each of the plurality of reception antennas. The wireless power transmitter 100 may detect the position of a surrounding object by analyzing a reflected wave pattern. For example, when it is determined that the pattern of the reflected wave is changed, the wireless power transmitter 100 may determine that a new object approaches the wireless power transmitter 100. The wireless power transmitter 100 may determine the location of the electronic device based on at least one of the amplitude, phase, or reception time of the received wave received from at least one reception antenna. The wireless power transmitter 100 may determine the location of the electronic device using various radar-based location measurement methods.

According to various embodiments, the wireless power transmission device 100 may include a sensor (eg, a camera module) capable of obtaining an image. The wireless power transmission device 100 may analyze the acquired image, and may determine the position of at least one of the electronic device or the obstacle based on the analysis result. For example, the wireless power transmitter 100 may acquire at least one image of at least one direction of the surroundings. The wireless power transmitter 100 may continuously acquire a plurality of frame images and detect a change between the frame images. For example, the wireless power transmitter 100 may determine that an object not detected in the first frame image is included in the second frame image, and accordingly, corresponds to the object at a time corresponding to the second frame image. It may be determined that the subject to be targeted is located near the wireless power transmission device 100 . The wireless power transmitter 100 may determine the location of a subject near the wireless power transmitter 100 based on at least one of a position of an object or a size of an object in an image. For example, the wireless power transmission device 100 may determine the location of the subject based on at least one of the position or direction of the camera that has taken the image and at least one of the position or size of the subject in the captured image. can The wireless power transmitter 100 may determine whether the newly detected object is a chargeable electronic device or a human body by applying various recognition algorithms to the image. The wireless power transmitter 100 may determine the location of the electronic device using various types of sensors, or may receive information about the location of the electronic device from other location measurement devices.

In operation 203, the wireless power transmitter 100 may form an RF wave based on the determined location. The wireless power transmitter 100 may control at least one of the phase or amplitude of each electrical signal input to each patch antenna so that the sub-RF waves become constructive interference at the determined location. The wireless power transmitter 100 may control at least one of the phase or amplitude of each electrical signal input to each patch antenna by controlling at least one of a phase shifter or an amplifier connected to each patch antenna. In the wireless power transmission apparatus 100 according to various embodiments, each electrical signal input to each patch antenna is prevented from applying an RF wave of a predetermined size or more to a body position even though RF waves constructively interfere at a position of an electronic device. At least one of the phase or amplitude of can be controlled.

According to various embodiments, the wireless power transmission apparatus 100 uses relational information between at least one of pre-stored spatial coordinates and the phase or amplitude of the electrical signal to determine the electrical signal input to each patch antenna. At least one of phase or amplitude may be controlled. The wireless power transmission apparatus 100 receives at least one related information of phase control degree or amplitude of an electrical signal input to each of a plurality of patch antennas corresponding to the position of the electronic device 150 confirmed through various types of sensors. By using it, it is possible to quickly check the transmission condition of the RF wave. The wireless power transmitter 100 may check the magnitude of the RF wave applied to the body position when the RF wave is formed under the confirmed transmission condition based on calculation or pre-stored information. If the magnitude of the RF wave applied to the location of the body is greater than or equal to a specified value, the wireless power transmitter 100 may form the RF wave using a detour path.

3 shows a block diagram of a wireless power transmission device according to various embodiments.

According to various embodiments, the wireless power transmission apparatus 100 includes a power source 301, an antenna array 310 for power transmission, a processor 320, a memory 330, a sensor 335, a communication circuit ( 340) and communication antennas 341 to 343. The electronic device 150 is not limited as long as it is a device that wirelessly receives power, and includes an antenna 351 for receiving power, a rectifier 352, a converter 353, a charger 354, a processor 355, A memory 356, a communication circuit 357, and an antenna 358 for communication may be included.

The power source 301 may provide power for transmission to the antenna array 310 for power transmission. The power source 301 may provide, for example, DC power. In this case, an inverter (not shown) converts the DC power into AC power and transfers it to the antenna array 310 for power transmission wirelessly. It may be further included in the power transmission device 100. Meanwhile, in another embodiment, the power source 301 may provide AC power to the antenna array 310 for power transmission. In one embodiment, the sensor 335 may include an antenna for transmitting a transmitted wave and an antenna for receiving a reflected wave. A device including an antenna for transmitting a transmission wave and an antenna for receiving a reflected wave may be referred to as a transceiver. In various embodiments, the sensor 335 may include a plurality of transceivers. For example, the processor 320 may determine the distance from the transceiver to the living body through one transceiver. The processor 320 may determine distances from each of the transceivers to the living body using two transceivers, and determine the 2D position of the living body based on the determined distances.

The power transmission antenna array 310 and the sensor 335 may share the power source 301, and in this case, the power source 301 may form power having a plurality of frequencies. In another embodiment, the wireless power transmitter 100 may include another power source (not shown) for providing power to the sensor 335 .

The antenna array 310 for power transmission may include a plurality of patch antennas. For example, a plurality of patch antennas as shown in FIG. 1 may be included in the antenna array 310 for power transmission. There is no limitation on the number or arrangement of patch antennas. The antenna array 310 for power transmission may form an RF wave using power provided from the power source 301 . The antenna array 310 for power transmission may form an RF wave in a specific direction according to the control of the processor 320 . Here, forming RF waves in a specific direction may mean controlling at least one of amplitudes and phases of the sub RF waves so that the sub RF waves cause constructive interference at at least one point in the specific direction. For example, the processor 320 may control at least one of a phase shifter or an amplifier connected to the antenna array 310 for power transmission. Meanwhile, the antenna array 310 for power transmission is for power transmission, and may be referred to as an antenna for power transmission.

The processor 320 may determine the location of the electronic device 150, and may control RF waves to be formed based on the determined location. That is, the processor 320 may control the patch antennas of the power transmission antenna array 310 that generate the sub RF waves so that the sub RF waves cause constructive interference at the determined position. For example, the processor 320 controls the patch antennas or a control means (eg, at least one of a phase shifter or an amplifier) connected to the patch antennas to determine the amplitude or phase of sub-RF waves generated from each of the patch antennas. You can control at least one. The processor 320 may control patch antennas or a control unit (eg, at least one of a phase shifter and an amplifier) connected to the patch antennas so that RF waves having a specified size or more are not formed at the confirmed body position. For example, the processor 320 may determine the position of the living body using a plurality of transceivers, and the RF may be beamformed at the position of the electronic device 150 without having a size larger than a specified size at the position. waves can be formed.

In various embodiments, the processor 320 may determine the location of the electronic device 150 based at least on data acquired by the sensor 335 . The sensor 335 may be, for example, a radar type and may include at least one antenna. The processor 320 may control at least a portion of at least one antenna to form a transmission wave. For example, at least one antenna may form a transmission wave at the same time point or at different time points. Alternatively, only one of the at least one antenna may form a transmission wave. The transmission wave may be reflected by the electronic device 150 or the living body. Accordingly, the reflected wave can travel in a direction different from that of the transmitted wave. At least one of the amplitude or phase of the reflected wave may be different from at least one of the amplitude and phase of the transmitted wave. The antenna may convert the reflected wave into an electrical signal and output it to a sensor. The sensor may sense at least one of information about a phase, an amplitude, or a reception point of each reflected wave, according to an electrical signal output from each antenna. The processor 320 may determine the position of at least one of the electronic device 150 and the living body based on at least one of information about the phase, amplitude, or reception time of each reflected wave. The processor 320 may determine the location of the living body based on a result of differentially calculating the clutter map from the data map corresponding to the reflected wave, that is, the received wave. The processor 320 may update the clutter map every cycle, and for example, may update the clutter map using the clutter map of the previous cycle and the data map of the current cycle. Let me explain later.

The wireless power transmitter 100 according to various embodiments may receive a communication signal 359 from the electronic device 150 through antennas 341 , 342 , and 343 . The processor 320 may determine the location of the electronic device 150 based on the reception time of the communication signal 359 at each of the antennas 341 , 342 , and 343 . The processor 320 may determine the location of the electronic device 150 by using both data from the sensor 335 and information obtained through the communication circuit 340 . For example, at least three communication antennas 341 to 343 may be disposed, which may be used to determine a three-dimensional direction, for example, values of θ and φ in a spherical coordinate system. More specifically, the communication antenna 358 of the electronic device 150 may transmit a communication signal 359. In various embodiments, the communication signal 359 may include at least one of identification information of the electronic device 150, information required for wireless charging, or at least one piece of sensing information of the electronic device 150. Accordingly, the wireless power transmitter 100 may determine the direction of the electronic device 150 without additional hardware by using a communication signal for wireless charging. Meanwhile, the time at which the communication signal 359 is received by the communication antennas 341 to 343 may be different. The processor 320 of the wireless power transmission apparatus 100 uses the time (eg, t1, t2, t3) at which the communication signal is received from the communication antennas 341, 342, and 343 to obtain electronic information for the wireless power transmission apparatus 100. The relative orientation of device 150 can be determined. For example, the processor 320 may determine a relative direction of the electronic device 150 with respect to the wireless power transmitter 100 using time difference information of t1-t2, t2-t3, and t3-t1. Alternatively, the processor 320 may determine the relative direction of the electronic device 150 by using, for example, a lookup table between the difference in reception time for each communication antenna stored in the memory 330 and the direction of the electronic device. The wireless power transmitter 100 (or the processor 320) may determine the relative direction of the electronic device 150 in various ways. For example, the relative direction of the electronic device 150 may be determined using various methods such as time difference of arrival (TDOA) or frequency difference of arrival (FDOA), and the type of program or algorithm for determining the direction of the received signal is limited. there is no Alternatively, the wireless power transmitter 100 may determine the relative direction of the electronic device 150 based on the phase of the received communication signal.

According to various embodiments, the processor 320 may determine whether the type of object determined using the sensor 335 is a living body or an electronic device according to whether the communication signal 359 is received. When it is determined that the position at which the communication signal 359 is formed corresponds to the position determined by the sensor 335, the processor 320 may determine that the object sensed by the sensor 335 is the electronic device 150. there is. When the position where the communication signal 359 is formed does not correspond to the position determined by the sensor 335 or the communication signal 359 is not received, the processor 320 determines that the object sensed by the sensor 335 It may be determined that the electronic device 150 is not. Alternatively, the processor 320 may determine whether the sensed object is a living body or an electronic device based at least on the pattern of the reflected wave reflected from the object.

The processor 320 may control the antenna array 310 for power transmission based on the location of the electronic device 150 and the location of the living body. Accordingly, the wireless power transmission apparatus 100 may form an RF wave toward the position of the electronic device 150 without applying an RF wave having a size greater than or equal to a specified size to the living body. Processor 320 may use information in communication signal 359 to identify electronic device 150 . The communication signal 359 may include a unique identifier or unique address of the electronic device. Communication circuitry 340 may process communication signal 359 and provide information to processor 320 . The communication circuit 340 and the communication antennas 341, 342, and 343 may be manufactured based on various communication methods such as WiFi (wireless fidelity), Bluetooth, Zig-bee, and BLE (Bluetooth Low Energy), The type of communication method is not limited. Meanwhile, the communication signal 359 may include rated power information of the electronic device 150, and the processor 320 may perform electronic device 150 based on at least one of a unique identifier, a unique address, and rated power information of the electronic device 150. It may also determine whether the device 150 is charged. The processor 320 may include one or more of a central processing unit (CPU), an application processor (AP), or a communication processor (CP), and may include a microcontroller. It may be implemented as a micro controller unit or a mini computer.

In addition, the communication signal 359 is a process for the wireless power transmitter 100 to identify the electronic device 150, a process for allowing the electronic device 150 to transmit power, and information related to received power to the electronic device 150. It can also be used in a process of requesting, receiving information related to received power from the electronic device 150, and the like. That is, the communication signal 359 may be used in a subscription, command, or request process between the wireless power transmitter 100 and the electronic device 150. The communication signal 359 may include information sensed by the electronic device 150 (eg, motion sensing information such as acceleration sensing information or rotation sensing information, information related to the amount of power such as voltage or current, etc.) .

Meanwhile, the processor 320 may control the power transmission antenna array 310 to form an RF wave 311 toward the determined location of the electronic device 150 . The processor 320 controls at least one of a phase shifter or an amplifier included in the power transmission antenna array 310 or connected to the outside of the power transmission antenna array 310, so that the electronic device 150 It can be controlled to form an RF wave 311 toward the location.

The power reception antenna 351 is not limited as long as it is an antenna capable of receiving RF waves. In addition, the antenna 351 for power reception may also be implemented in an array form including a plurality of antennas. The AC power received by the power receiving antenna 351 may be rectified into DC power by the rectifier 352 . The converter 353 may convert DC power into a required voltage and provide it to the charger 354 . The charger 354 may charge a battery (not shown). Meanwhile, although not shown, the converter 353 may provide the converted power to a power management integrated circuit (PMIC) (not shown), and the PMIC (not shown) supplies power to various hardware of the electronic device 150. may also provide.

Meanwhile, the processor 355 may monitor the voltage of the output terminal of the rectifier 352 . For example, the electronic device 150 may further include a voltmeter connected to the output terminal of the rectifier 352, and the processor 355 may receive a voltage value from the voltmeter and monitor the voltage of the output terminal of the rectifier 352. there is. The processor 355 may provide information including the voltage value of the output terminal of the rectifier 352 to the communication circuit 357 . The charger, converter, and PMIC may be implemented with different hardware, but at least two elements may be integrated into one hardware. Meanwhile, the voltmeter may be implemented in various forms, such as an electro dynamic instrument voltmeter, an electrostatic voltmeter, and a digital voltmeter, and the types are not limited. The communication circuit 357 may transmit a communication signal including received power related information using the communication antenna 358 . The received power-related information may be, for example, information related to the magnitude of the received power, such as the voltage of the output terminal of the rectifier 352, and may include the current of the output terminal of the rectifier 352. In this case, an ammeter capable of measuring the current of the output terminal of the rectifier 352 may be further included in the electronic device 150, and those skilled in the art will easily understand. The ammeter may be implemented in various forms such as a DC ammeter, an AC ammeter, a digital ammeter, and the like, and the type is not limited. In addition, the location of measuring received power-related information is not limited to any point of the electronic device 150 as well as the output terminal or input terminal of the rectifier 352 . Alternatively, the processor 355 may transmit sensing information of various electronic devices 150 by including them in the communication signal 359 . In addition, as described above, the processor 355 may transmit the communication signal 359 including the identification information of the electronic device 150 . The memory 356 may store programs or algorithms capable of controlling various hardware of the electronic device 150 .

4 is a diagram of a position measuring device according to various embodiments.

The location measuring device 400 according to the embodiment of FIG. 4 may be included in the wireless power transmission device 100, but may also be implemented as a single location measuring device. The position measuring device 400 may include a first transceiver 401 and a second transceiver 402 . Each of the first transceiver 401 and the second transceiver 402 may include an antenna for transmitting a transmission wave and an antenna for receiving a reflected wave corresponding to the transmission wave, that is, a reception wave. Accordingly, the first transceiver 401 and the second transceiver 402 may be referred to as sensors. The position measuring device 400 may determine the distance RA from the first transceiver 401 to the target based on data on the received wave obtained through the first transceiver 401 . The position measuring device 400 may determine a distance RB from the second transceiver 402 to the target based on data on the received wave obtained through the second transceiver 402 . The position measuring device is based on the distance RA from the first transceiver 401 to the target and the distance RB from the second transceiver 402 to the target, and the position of the target based on the position measuring device 400 can judge For example, the location measurement device 400 may determine the location of the target using a triangulation method. The position measurement device 400 may be placed near a wall, and accordingly, the position of the target may be determined using two transceivers.

The wireless power transmission device 100 may determine the RF wave formation condition based on the location of the target received from the location measuring device 400, for example. In various embodiments, the first transceiver 401 and the second transceiver 402 may be implemented as an impulse radio ultra-wideband (IR-UWB) radar, but those skilled in the art may easily understand that the implementation form is not limited. There will be. IR-UWB radar may be suitable for detecting passive targets that do not transmit signals to other anchor nodes. IR-UWB radar generates electromagnetic waves of a relatively small size and thus has little effect on a living body, so it may be suitable for detecting a living body.

5 is a flowchart illustrating an operating method of a location measuring device using a clutter map according to various embodiments of the present disclosure.

In operation 510, the location measuring device 400 according to various embodiments may generate and store a signal map of the surrounding environment, and may name the signal map of the surrounding environment a clutter map. Transmitted electromagnetic waves may be reflected around the position measuring device 400 , and accordingly, the clutter map may be data representing reflection characteristics of at least one object located around the position measuring device 400 . As described above, the position measurement device 400 may be included in the wireless power transmission device 100, and in this case, the operation of the position measurement device 400 may be interpreted as the operation of the wireless power transmission device 100. . The wireless power transmitter 100 (or the position measuring device 400) performing a specific operation is included in the processor 320 (or the position measuring device 400) included in the wireless power transmitter 100. It may mean that a selected processor) performs a specific operation. Alternatively, the wireless power transmission device 100 (or the location measurement device 400) performing a specific operation is performed by the processor 320 (or the location measurement device 400) included in the wireless power transmission device 100. It may mean that a processor included in) controls other hardware to perform a specific operation. Alternatively, the wireless power transmission device 100 (or the location measurement device 400) performing a specific operation is the memory 330 (or the location measurement device 400) included in the wireless power transmission device 100 This means that at least one piece of hardware included in the wireless power transmission device 100 (or the position measuring device 400) performs a specific operation as an instruction corresponding to a specific operation stored in the memory included in is executed. You may. The position measuring device 400 according to various embodiments may transmit a transmission signal in an environment where a target is not located, receive a reception signal corresponding thereto, and generate a clutter map based on the received reception signal. can In the clutter map, one axis may be a time axis and the other axis may be an axis representing signal strength. The position measurement device 400 may sample data on the intensity of the received signal as N samples, where N may be a natural number greater than or equal to 1. The location measuring device 400 may generate an initial clutter map based on N samples.

)는 수학식 1과 같이 표현될 수 있다.In operation 520, the position measuring device 400 may generate a transmission signal for body position measurement. In operation 530, the position measuring device 400 may detect a received signal during the first period. The position measuring device 400 may sample data on the strength of the received signal with N samples, and the time interval between adjacent samples may be, for example, 13 ps, but the time interval is not limited. will be easily understandable. A time interval of 13 ps may represent a difference of 4 mm in distance, which may mean that 256 samples are required for a scan over a range of 1 m. The signal vector received by the position measuring device 400 as the k th signal vector (

) can be expressed as in Equation 1.

)는 예를 들어 대칭 행렬(transpose matrix) 형태로 표현될 수 있으며, 행렬 내 성분들인 r_k(i)은 k번째 수신된 수신 신호의 i번째 샘플로서, 신호 세기의 데이터일 수 있다. 상술한 바와 같이, 위치 측정 장치(400)는, 수신 신호를 N개의 샘플로 샘플링할 수 있으며, 이에 따라 N개의 성분들을 포함하는 신호 벡터(

)를 생성할 수 있다. 위치 측정 장치(400)는, 1번째 수신한 수신 신호에 대한 제 1 신호 벡터로부터, K번째 수신한 수신 신호에 대한 제 K 신호 벡터를 포함하는 행렬(R)을 수학식 2와 같이 생성할 수 있다.The k-th received signal vector (

) may be expressed, for example, in the form of a transpose matrix, and elements in the matrix, r _k (i), are the i-th sample of the k-th received received signal, and may be signal strength data. As described above, the position measuring device 400 may sample the received signal with N samples, and accordingly, a signal vector including N components (

) can be created. The position measuring device 400 may generate a matrix R including the K th signal vector for the K th received signal from the first signal vector for the first received signal as shown in Equation 2. there is.

)는 상대적으로 느린 시간 도메인에 대응될 수 있으며, 신호 벡터(

) 내에 포함되는 성분들인 r_k(i) 각각은 상대적으로 빠른 시간 도메인에 대응될 수 있다. 신호 벡터(

) 및 행렬(R)에는 저주파 잡음, 백색 잡음, 외부 간섭 신호 및 클러터 신호가 포함될 수 있다. 클러터 신호는, 원하는 타겟, 즉 생체가 아닌 다른 객체들로부터 반사되는 신호를 의미할 수 있으며, 이에 따라 타겟 검출 시에는 클러터 신호가 부가 잡음일 수 있다.The signal vector in the matrix R of Equation 2 (

) may correspond to a relatively slow time domain, and the signal vector (

) Each of the components r _k (i) included in may correspond to a relatively fast time domain. signal vector (

) and the matrix R may include low-frequency noise, white noise, an external interference signal, and a clutter signal. The clutter signal may refer to a signal reflected from a desired target, ie, objects other than the living body, and thus, the clutter signal may be additional noise when the target is detected.

)를 생성할 수 있으며, 이 경우 256번째 및 257 샘플, 즉 다음 프레임의 샘플 사이에 큰 변경이 포함될 가능성도 있다. 해당 불연속이 부가 잡음으로 동작할 수도 있으며, 신호대 잡음 비(SNR)을 악화시킬 수도 있다. 해당 영향을 방지하기 위하여, 위치 측정 장치(400)는 프레임 스티칭(frame stitching) 프로세스를 수행할 수 있다. 프레임 스티칭 과정은 수학식 3과 같이 표현될 수 있다.As described above, the position measurement device 400 according to the example uses 256 samples to signal vector signal vector (

), and in this case, there is a possibility that a large change may be included between the 256th and 257th samples, that is, the samples of the next frame. The discontinuity may act as additive noise and may deteriorate the signal-to-noise ratio (SNR). In order to prevent this effect, the position measuring device 400 may perform a frame stitching process. The frame stitching process can be expressed as Equation 3.

는 프레임 스티칭된 수신된 신호를 의미할 수 있으며, M은 N/256의 값일 수 있다.In Equation 3,

may mean a frame-stitched received signal, and M may have a value of N/256.

)는 수학식 4와 같이 표현될 수 있다.The position measuring device 400 according to various embodiments may perform low-frequency noise cancellation in addition to the frame-stitched signal. For example, low-frequency noise can be caused by transceiver hardware and external interfering signals. The location measuring device 400 may perform filtering in a relatively fast time domain, and may perform filtering using, for example, a band pass filter. In order to set an appropriate passband, the position measuring device 400 may check the frequency band of the transmitted pulse signal. A signal magnitude versus time index of the transmitted pulse signal may be the same as that of FIG. 8A. A pass band of the band pass filter may be set based on the power spectrum of the acquired signal, and the power spectrum versus frequency index of the band pass filter may be as shown in FIG. 8B. The signal on which the position measurement device 400 has performed filtering (

) can be expressed as in Equation 4.

는 대역통과 필터의 계수 벡터(coefficient filter)를 의미하며, 필터링을 수행한 신호(

)는, 프레임 스티칭된 수신된 신호(

) 및 대역통과 필터의 계수 벡터(

)의 합성곱 연산(ⓧ)(convolution)에 의하여 획득될 수 있다.in Equation 4

Means a coefficient vector of a bandpass filter, and the filtered signal (

) is the frame-stitched received signal (

) and the coefficient vector of the bandpass filter (

) can be obtained by the convolution operation (ⓧ) (convolution).

)에 대하여 교차 상관 프로세스를 수행할 수 있다. 교차 상관 프로세스는 수학식 5와 같이 표현될 수 있다.A position measuring device according to various embodiments is a signal subjected to filtering (

), a cross-correlation process can be performed. The cross-correlation process can be expressed as Equation 5.

In Equation 5, s(n−l) may be an n−lth component of the transmitted pulse signal, and the position measuring device 400 may cross-correlate the transmitted pulse signal and the received signal according to Equation 5. By cross-correlating the received signal with the transmitted pulse signal, the magnitude of the reflected signal included in the received signal can be increased and the magnitude of noise or interfering signals can be reduced. By the above processes, the target signal and the clutter signal can become dominant in the received signal, and the SNR can be increased.

)을 수학식 6과 같이 확인할 수 있다.In operation 540, the position measuring device 400 may subtract a signal map of the surrounding environment, that is, a clutter map, from the received signal data. In operation 550, the position measuring device 400 may determine the distance to the living body based on the subtracted data. The position measuring device 400 may predict a clutter signal, and may name the predicted clutter signal a clutter map. The position measurement device 400 generates a k-th clutter map for processing the k-th received signal (

) can be confirmed as shown in Equation 6.

는 k-1번째의 클러터 맵이며, λ는 임의의 계수일 수 있다. 클러터 맵(

)은 벡터로서,

으로 표현될 수 있으며, 즉 N개의 요소를 가질 수 있다.In Equation 6,

is the k-1th clutter map, and λ may be an arbitrary coefficient. clutter map (

) is a vector,

It can be expressed as , that is, it can have N elements.

In various embodiments, the position measurement device 400 may update the k-th clutter map by using the k-1-th clutter map and the k-th received signal, as shown in Equation 7.

)의 λ-1배의 합에 기반하여 k-1번째 클러터 맵의 데이터를 설정할 수 있다. 위치 측정 장치(400)는, 교차 상관 프로세스를 수행한 신호(

)의 데이터 및 갱신된 k번째 클러터 맵의 차연산을 수학식 8과 같이 수행할 수 있다.The position measurement device 400 may compare the difference between the data of the k-th received signal and the data of the k-1-th clutter map with the value of the k-1-th clutter map, and data to be updated according to the comparison result. can judge For example, when the difference between the data of the k-th received signal and the data of the k-1-th clutter map is less than 0.1 times the data of the k-1-th clutter map, the position measuring device 400 determines the k-th clutter map data. Data of the received signal may be set as data of the k-th clutter map. For example, when the difference between the data of the k-th received signal and the data of the k-1-th clutter map exceeds the data of the k-1-th clutter map, the position measuring device 400 determines the k-1 Data of the k-th clutter map may be set as data of the k-th clutter map. For example, the difference between the data of the k-th received signal and the data of the k-1 clutter map is not less than 0.1 times the k-1 clutter map, or the data of the k-th received signal and the k-1 clutter map. When the difference between the data of the k-th clutter map does not exceed the data of the k-1 th clutter map, the position measuring device 400 performs the data of the k-1 th clutter map according to Equation 6. can be set. More specifically, the position measuring device 400 is a signal obtained by performing the cross-correlation process and λ times the data of the k-1th clutter map (

), it is possible to set the data of the k-1th clutter map based on the sum of λ-1 times. The position measurement device 400 is a signal that has undergone a cross-correlation process (

) and the updated k-th clutter map can be calculated as shown in Equation 8.

)에 기반하여 타겟의 위치를 판단할 수 있다. 위치 측정 장치(400)는, 타겟 데이터(

)가 지정된 값보다 큰 지점에 타겟이 위치한 것으로 판단할 수 있다. 예를 들어, k=3, 4, 5, 6, 7인 구간의 타겟 데이터가 지정된 값보다 크다고 판단되면, 위치 측정 장치(400)는, 3, 4, 5, 6, 7의 샘플의 시간 정보에 기반하여 판단된 거리 지점들에 타겟이 위치한 것으로 판단할 수 있다. 즉, 위치 측정 장치(400)는 타겟 데이터의 피크 검출(peak detecting)의 결과에 기반하여, 타겟의 위치를 판단할 수 있다. 위치 측정 장치(400)는, 타겟 데이터(

)에 거리 보정 값(distance correction value)을 곱하고, 이후 피크 검출을 수행하여 타겟의 위치를 판단할 수 있다. 이는, 상대적으로 먼 거리에 대응하는 데이터의 값을 상대적으로 높이는 절차일 수 있다.The position measuring device 400 is the target data obtained as a result of the difference operation (

), it is possible to determine the position of the target based on. The position measuring device 400 includes target data (

) can be determined that the target is located at a point where the target is greater than the specified value. For example, if it is determined that the target data of k=3, 4, 5, 6, and 7 sections is greater than a specified value, the position measuring device 400 provides time information of samples of 3, 4, 5, 6, and 7 samples. It may be determined that the target is located at the determined distance points based on . That is, the location measurement device 400 may determine the location of the target based on a peak detecting result of the target data. The position measuring device 400 includes target data (

) is multiplied by a distance correction value, and then peak detection is performed to determine the position of the target. This may be a procedure of relatively increasing a value of data corresponding to a relatively long distance.

6 is a flowchart illustrating a method of operating a position measuring device according to various embodiments of the present disclosure.

According to various embodiments, the location measuring device 400 may store the first signal map in operation 610 . For example, the first signal map may be a map generated by the location measuring device 400 in an environment without a target and may be used as a reference. More specifically, the location measuring device 400 may transmit a transmission signal in an environment without a target and may receive a reception signal corresponding thereto. The location measuring device 400 may, for example, perform at least one of frame stitching, band-pass filtering, and cross-correlation on the received signal, and obtain and store a first signal map according to a result of the execution. .

In operation 620, the position measuring device 400 may generate a transmission signal. In operation 630, the position measuring device 400 may detect a received signal during the first period. In operation 640, the location measuring device 400 may generate a second signal map obtained by updating the first signal map based on the difference between the data of the received signal and the first signal map. For example, the location measuring device 400 may perform at least one of frame stitching, band-pass filtering, and cross-correlation on the received signal during the first period. The location measuring device 400 may generate a second signal map obtained by updating the first signal map based on a difference between the processed received signal and the first signal map. For example, as in Equation 7, the position measuring device 400 calculates the difference between the processed signal (eg r _k (n)) and the first signal map (eg c _k-1 (n)). may be compared with the first signal map (eg, c _k-1 (n)), and a value of the second signal map may be determined according to the comparison result. In operation 650, the position measurement device 400 may subtract the second signal map from the received signal data. In operation 660, the position measuring device 400 may determine the distance to the living body, that is, the position to the living body, based on the subtracted data.

7 is a flowchart illustrating an operating method of a position measuring device according to various embodiments.

According to various embodiments, the location measuring device 400 may determine the target location based on data of the first received signal detected during the first period in operation 710 . The location measuring device 400 may determine the target location based on a peak detection method for the first received signal. The location measurement device 400 may determine the target location based on the data of the first received signal detected during the first period according to the method described with reference to FIG. 5 or FIG. 6 , or in another method. According to the target position can be determined. The position of the peak may be almost constant, but a large fluctuation may occur in the position of the peak due to a false alarm. A false positive may cause an error in the position of the target, and the false positive may generally be an instantaneous peak and not continuous. These errors can be mitigated by complementing the current period's peak position with the period's peak position according to at least one previous period's peak position. In particular, since the time interval between the two received signals is very short, a difference between the peak position in the current period and the peak position in the previous period may not be large. The peak set (δ _k−1 ) for the k−1 th received signal obtained by the position measuring device 400 as a result of peak detection may be expressed as Equation 9.

In Equation 9, p _(k−1)j represents the position of the peak, k−1 represents the k−1th received signal, and j may be a number greater than 0 and smaller than P. P may be the total number of peaks detected in the k-1th received signal.

)를 획득 할 수 있다. 750 동작에서, 위치 측정 장치(400)는, 복수 개의 데이터 각각에 대한, 타겟 검출용 임계치를 제 1 수신 신호의 데이터에 기반하여 결정할 수 있다. 예를 들어, 위치 측정 장치(400)는, 이전 기간의 피크에 기반하여, 수학식 10의 가중치 벡터를 획득할 수 있다.In operation 720, the position measuring device 400 may generate a transmission signal. In operation 730, the position measuring device 400 may detect a second received signal during the second period. The second received signal received during the second period is referred to as the k-th received received signal. In operation 740, the position measuring device 400 may sample the second received signal as a plurality of pieces of data. The position measuring device 400, for example, according to at least one of Equations 1 to 9, the target data (

) can be obtained. In operation 750, the position measuring device 400 may determine a target detection threshold for each of a plurality of pieces of data based on the data of the first received signal. For example, the location measurement device 400 may obtain the weight vector of Equation 10 based on the peak of the previous period.

) 및 가중 팩터를 수학식 11과 같이 연산할 수 있다.The position measurement device 400 is the k-th received and processed target data (

) and the weighting factor can be calculated as shown in Equation 11.

)에 기반하여 피크 검출을 위한 임계치(

)를 생성할 수 있다. 예를 들어, 위치 측정 장치(400)는, OS-CFAR(ordered statistics-constant false alarm rate) 방식에 기반하여 임계치(

)를 생성할 수 있다. 760 동작에서, 위치 측정 장치(400)는, 가중 팩터가 적용된 타겟 데이터(

) 내의 복수 개의 데이터 각각이 결정된 임계치(

) 각각 이상인지 여부에 기반하여, 복수 개의 데이터 중 타겟에 대응하는 데이터를 식별할 수 있다. 위치 측정 장치(400)는, 타겟 데이터(

)가 임계치(

)를 초과하는 인덱스(n^*)를 판단할 수 있다. 타겟 데이터(

)가 임계치(

)를 초과하는 인덱스(n^*)가 존재하지 않으면, 위치 측정 장치(400)는 피크 집합(δ_k)에서 p_(k-1)j를 삭제할 수 있다. 타겟 데이터(

)가 임계치(

)를 초과하는 인덱스(n^*)가 존재하면, 위치 측정 장치(400)는 피크 집합(δ_k)에서의 p_kj를 p_(k-1)j로 대체할 수 있다. 아울러, 위치 측정 장치(400)는 피크 집합(δ_k)에 새롭게 확인된 피크들(p_k(P+1),p_k(P+2) 등)을 추가할 수도 있다.Equation 11 may mean a component multiplier. The position measurement device 400 is the target data to which the weight factor is applied (

) Threshold for peak detection based on (

) can be created. For example, the position measurement device 400 sets a threshold (based on an ordered statistics-constant false alarm rate (OS-CFAR) method).

) can be created. In operation 760, the position measuring device 400 calculates target data to which a weight factor is applied (

) The threshold value determined by each of the plurality of data in (

), it is possible to identify data corresponding to a target among a plurality of data based on whether each is abnormal. The position measuring device 400 includes target data (

) is the threshold (

) can be ^determined . target data (

) is the threshold (

), the position measuring device ⁴⁰⁰ may delete p _(k-1)j from the peak set δ _k . target data (

) is the threshold (

), the position measuring device ⁴⁰⁰ may replace p _kj in the peak set δ _k with p _(k−1)j . In addition, the position measuring device 400 may add newly identified peaks (p _k(P+1) , p _k(P+2), etc.) to the peak set δ _k .

As described above, the position measuring device 400 according to various embodiments may apply a relatively high weight to data corresponding to a point where a peak is detected in an existing period, so that more accurate peak detection is performed. It can be.

9A is data about distances according to a plurality of received signal indices obtained by a position measuring device according to various embodiments. 9B is data about distances according to a plurality of received signal indices acquired by a position measuring device according to various embodiments. In FIG. 9B , an error occurs in the distance determined by false positives, whereas in FIG. 9A , it can be confirmed that the distance is stably measured to be around 3m.

10A is data about the location of a target obtained by a location measuring device according to various embodiments. 10B is data about the location of a target acquired by a location measuring device according to various embodiments. It can be seen that the number of error locations due to false positives is relatively small in FIG. 10A , compared to the detection of error locations due to false positives in FIG. 10B .

11A is data about the location of a target acquired by a location measuring device according to various embodiments. 11B is data about the location of a target acquired by a location measuring device according to various embodiments. A distance between the positioning device and the target in the experimental environment of FIGS. 11A and 11B may be greater than the distance between the positioning device and the target in the experimental environment of FIGS. 10A and 10B . In FIG. 11B , it is confirmed that the number of location candidates is relatively large compared to FIG. 11A , and it can be confirmed that the location measuring device according to various embodiments is robust in detecting the location of a remote target.

Each component (eg, module or program) according to various embodiments may be composed of a single object or a plurality of objects, and some sub-components among the aforementioned sub-components may be omitted, or other sub-components may be used. It may be further included in various embodiments. Alternatively or additionally, some components (eg, modules or programs) may be integrated into one entity and perform the same or similar functions performed by each corresponding component prior to integration. According to various embodiments, operations performed by modules, programs, or other components are executed sequentially, in parallel, iteratively, or heuristically, or at least some operations are executed in a different order, are omitted, or other operations are added. It can be.

According to various embodiments of the present invention, in a storage medium storing instructions, the instructions are set to cause the at least one processor to perform at least one operation when executed by at least one processor, and the at least one An operation of generating and storing a first clutter map representing reflection characteristics of an object located in the vicinity of the wireless power transmitter based on at least the first data acquired during the first period, and during the second period A difference between the acquired second data and the first clutter map is compared with data included in the first clutter map, and a second clutter map corresponding to the second period is prepared based on the comparison result. An operation of generating, an operation of determining a location of a body by using the second data and the second clutter map, and an RF charging an electronic device without generating an RF wave having a size greater than or equal to a specified size at the location of the body It may include an operation to form a wave.

According to various embodiments of the present invention, in a storage medium storing instructions, the instructions are set to cause the at least one processor to perform at least one operation when executed by at least one processor, and the at least one An operation of generating a first clutter map representing reflection characteristics of an object located around the position measuring device based on at least first data obtained during a first period, and a second clutter map through the second antenna. A difference between second data obtained during two periods and the first clutter map is compared with data included in the first clutter map, and based on the comparison result, a second clutter map corresponding to the second period is obtained. An operation of generating a clutter map, and an operation of determining a location of the target using the second data and the second clutter map.

And the embodiments disclosed in this document are presented for explanation and understanding of the disclosed technical content, and do not limit the scope of the present disclosure. Therefore, the scope of the present disclosure should be construed to include all changes or various other embodiments based on the technical spirit of the present disclosure.

Claims (22)

A wireless power transmission device for wirelessly transmitting power to an electronic device,
an antenna for transmitting power including a plurality of patch antennas for transmitting wireless power;
sensor; and
contains a processor;
the processor,
Generating and storing a first clutter map representing reflection characteristics of an object located in the vicinity of the wireless power transmission device based on at least first data obtained by the sensor during a first period,
A difference between the second data acquired by the sensor during a second period and the first clutter map is compared with the data included in the first clutter map, and the second period is corresponded to based on the comparison result. generating a second clutter map that
determining a location of the living body using the second data and the second clutter map;
A wireless power transmission device configured to control the antenna for power transmission to form an RF wave for charging the electronic device without forming an RF wave having a size greater than or equal to a specified size at the location of the body. According to claim 1,
the processor,
When a difference between the first component of the second data and the first component of the first clutter map is smaller than a value obtained by multiplying the first component of the first clutter map by a specified first value , The wireless power transmitter configured to determine the value of the first component of the second clutter map as the value of the first component of the second data. According to claim 1,
the processor,
When a difference between a second component of the second data and a second component of the first clutter map is greater than a value obtained by multiplying the second component of the first clutter map by a second value, The wireless power transmitter configured to determine the value of the second component of the second clutter map as the value of the second component of the first clutter map. According to claim 1,
the processor,
A difference between the third component of the second data and the third component of the first clutter map is greater than or equal to a value obtained by multiplying the third component of the first clutter map by a specified first value, or When the difference between the third component of the second data and the third component of the first clutter map is less than or equal to a value obtained by multiplying the third component of the first clutter map by a second value, the A wireless power transmitter configured to determine a value of a third component of a second clutter map by using a third component of the first clutter map and a third component of the second data. delete According to claim 1,
the processor,
A wireless power transmitter configured to perform a frame stitching process on the first data and the second data. According to claim 6,
the processor,
A wireless power transmitter configured to perform band pass filtering on the frame-stitched first data and the frame-stitched second data. delete According to claim 1,
the processor,
Obtaining target data by performing a difference operation on the second clutter map from the second data;
The wireless power transmission device configured to determine the position of the body based on the position of a peak that is greater than or equal to a specified threshold among the components of the target data. delete In the operation method by a wireless power transmission device for wirelessly transmitting power to an electronic device,
generating and storing a first clutter map representing reflection characteristics of objects located around the wireless power transmitter, based at least on first data acquired by the wireless power transmitter during a first period;
The wireless power transmitter compares the difference between the second data acquired during the second period and the first clutter map with the data included in the first clutter map, and based on the comparison result, the second clutter map is obtained. generating a second clutter map corresponding to the period;
determining a location of the living body using the second data and the second clutter map; and
An operation of forming an RF wave for charging the electronic device while not forming an RF wave having a size greater than or equal to a specified size at the location of the living body.
A method of operating a wireless power transmission device comprising a. delete delete delete delete delete delete delete delete delete In the position measuring device for measuring the position of the target,
a first antenna configured to transmit a first transmission signal;
a second antenna configured to receive a first reception signal formed by reflection of the first transmission signal; and
contains a processor;
the processor,
Generating and storing a first clutter map representing reflection characteristics of objects located around the position measuring device based on at least first data acquired during a first period through the second antenna;
A difference between the second data obtained during a second period through the second antenna and the first clutter map is compared with the data included in the first clutter map, and based on the comparison result, the second clutter map is obtained. generating a second clutter map corresponding to the period;
A location measuring device configured to determine a location of the target using the second data and the second clutter map. A method of operation by a position measuring device comprising a first antenna set to transmit a first transmission signal and a second antenna set to receive a first received signal formed by reflection of the first transmission signal,
generating a first clutter map indicating reflection characteristics of objects located around the position measuring device based on at least first data acquired by the position measuring device during a first period through the second antenna;
The location measuring device compares the difference between the second data acquired during the second period through the second antenna and the first clutter map with the data included in the first clutter map, and determines the result of the comparison. generating a second clutter map corresponding to the second period based on the base; and
Determining a location of a target using the second data and the second clutter map
Method of operating a position measurement device comprising a.

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