baber/WOPTO huggingface dataset:
Patent JP-2023527887-A (JP)
Title: 光電子デバイス及び光電子デバイスの製造方法
IPC: H01L33/08
Filed: 2021-05-26
Abstract: 本発明は、基板２、２ａ、２ｂから形成された第１のＩｎＧａＮ系の材料を備える錐体２１を含む光電子用３次元立体構造体に関し、３次元構造体１が第２のＧａＮ系の材料からなるワイヤ２４を含むことを特徴とし、ワイヤ２４は、基板２、２ａ、２ｂとＩｎＧａＮ系の錐体２１のベース部２１０との間で基板２、２ａ、２ｂの平面に対して垂直な長手方向に延び、３次元構造体が鉛筆の一般形状を有するように、第１の材料とは異なることを特徴とする。本発明はまた、このような３次元構造体の製造方法、及びこのような３次元構造体の複数を用いた光電子デバイスに関する。
Patent JP-2023529168-A (JP)
Title: Ｒｈｏキナーゼ阻害剤放出インプラントおよび関連する使用方法
IPC: A61K45/00
Filed: 2021-06-02
Abstract: 本開示は、角膜障害、疾患、および／または状態、例えば角膜内皮ジストロフィーを治療および／または予防するための前房内インプラントに関する。前房内インプラントは、Ｒｈｏキナーゼ阻害剤のような治療薬剤の持続的放出を長期間提供するように構成することができる。前房内インプラントは、非生体吸収性アンカーまたは生体吸収性マトリックスを含むことができる。
Patent JP-2023531175-A (JP)
Title: 導電性窒化物膜の核生成のための方法
IPC: C23C16/455
Filed: 2021-06-11
Abstract: 窒素含有還元ガスと共に、特定のケイ素含有ハロゲン化物、ケイ素含有アミド、及び特定の金属前駆体を利用する、特定の金属窒化物基板表面の核生成のための改善された方法を提供する。前処理ステップを利用しながら、本方法は、そのような金属窒化物膜が堆積されたマイクロ電子デバイス基板が約１０Å～約１５Åの厚さ及び約１％未満の空隙領域を有する、大幅に改善された核生成を示す。このような核生成が達成された後で、従来の層ごとの堆積を迅速に行うことができる。【選択図】図１
Patent JP-2023532945-A (JP)
Title: 鍵を複合再構築するためのシーケンス暗号化方法
IPC: H04L9/22
Filed: 2021-06-25
Abstract: 本発明は、カオス的なｂｉｔセグメントストリームシーケンス暗号化を実現するために、一連の複合論理を使用してカオス的な演算構造を構築し、鍵を複合再構築するためのシーケンス暗号化方法を提供する。本発明では、ｂｉｔフェッチ論理、ｂｉｔ代謝論理、ｂｉｔ再構築論理などの演算論理ユニットをカオス的な演算構造によって派遣し、構築源と駆動源をセグメントごとに擬似ランダムに再構築し、駆動源を使用して構築源を擬似ランダムに制御し、鍵ビットセグメントの複合再構築をｂｉｔごと実行させ、"代謝されていない鍵ビットセグメント構築源ｂｉｔを擬似ランダムにスタッガード位置から抽出するか、または代謝された鍵ビットセグメント構築源ｂｉｔを重複位置から抽出する"という無限非ループ再生鍵ビットセグメント列を構築する。本発明は以下の核心を有する。（Ａ）カオス的な演算構造を構築し、暗号化プロセスにおいてワークプールをセグメントごとに代謝し、さらにワークプールによって運搬される駆動源と構築源に対して、駆動源中のｂｉｔでｂｉｔフェッチ論理を制御して構築源中のｂｉｔをセグメントごとに抽出することで、鍵ビットセグメントを擬似ランダムに複合再構築する。（Ｂ）カオス的な演算構造に基づいて、ｂｉｔフェッチ論理とｂｉｔ代謝論理を統合し、"代謝されていない構築源ｂｉｔを擬似ランダムにスタッガード位置から抽出するか、または代謝された構築源ｂｉｔを重複位置から抽出する"という鍵ビットセグメント無限非ループ構築論理を構築する。（Ｃ）カオス的な演算構造に基づいて複数の異なる再生鍵ビットセグメント列について、スタッガードセグメントの重畳暗号化を実施する。本発明の有益な効果は、演算能力の画期的な向上に適応するために、高効率、高密度、広い応用空間を有する安全な暗号化方法を提供することである。【選択図】図１
Patent JP-2023055711-A (JP)
Title: Control of total afucosylated glycoforms of antibodies produced in cell culture
IPC: C12P19/00
Filed: 2023-01-11
Abstract: PROBLEM TO BE SOLVED: To provide methods of modulating the levels of total afucosylated (TAF) glycoforms of a recombinant glycosylated protein produced by glycosylation-competent cells in a cell culture. 
     SOLUTION: A method comprises (i) maintaining the cell culture at an initial set point pH for an initial cell culture period and (ii) ceasing to maintain the cell culture at the initial set point pH after the initial cell culture period, where the initial pH is selected from a pH that is greater than about 6.50 and less than 7.5, and where the initial cell culture period is about 4 days to about 6 days. 
     SELECTED DRAWING: None 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023042593-A (JP)
Title: SiC epitaxial wafer
IPC: C30B29/36
Filed: 2023-01-18
Abstract: PROBLEM TO BE SOLVED: To provide an SiC epitaxial wafer in which a content of boron is reduced even at any in-plane position and of which the effective area is wide. 
     SOLUTION: An SiC epitaxial wafer comprises an SiC substrate and an epitaxial layer of SiC laminated on the SiC substrate. The epitaxial layer contains an impurity, which determines a conductivity type, and boron of which the conductivity type is different from that of the impurity. In the epitaxial layer, a concentration of the boron is less than 1.0×10 14  cm -3  at any in-plane position, and a boron concentration ratio of a boron concentration in a center of the epitaxial layer and a boron concentration at a point inside of an outer periphery of the epitaxial layer by 5 mm is 1.8 or less. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023041848-A (JP)
Title: Imaging apparatus
IPC: H04N25/65
Filed: 2023-02-01
Abstract: PROBLEM TO BE SOLVED: To provide an imaging apparatus which can materialize high speed imaging while reducing reset noise. 
     SOLUTION: An imaging apparatus comprises: a first pixel and a second pixel, each of which includes a photoelectric conversion unit, a charge storage unit, and a first transistor where one of a source and a drain is connected to the charge storage unit, and is arranged along a first direction; first wiring and second wiring, each extending along a first direction; a first voltage supply circuit connected to the first transistor of the first pixel via the first wiring; and second voltage supply circuit connected to the first transistor of the second pixel via the second wiring. 
     SELECTED DRAWING: Figure 2 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023054006-A (JP)
Title: Single fiber constraining for implantable medical devices
IPC: A61F2/95
Filed: 2023-02-07
Abstract: PROBLEM TO BE SOLVED: To provide excellent implantable medical devices and the like. 
     SOLUTION: Various aspects of the present disclosure are directed toward apparatuses, systems, and methods that include an implantable medical device and a constraining mechanism configured to constrain the implantable medical device to a delivery configuration. The constraining mechanism may include a single fiber arranged about the implantable medical device having a plurality of knots to maintain the constraining mechanism in constrained configuration with at least two of the plurality of knots being in contact in the constrained configuration. 
     SELECTED DRAWING: Figure 3 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023065463-A (JP)
Title: shelf
IPC: A47B96/02
Filed: 2023-02-15
Abstract: PROBLEM TO BE SOLVED: To provide a shelf capable of changing the form by which articles are supported. 
     SOLUTION: A shelf includes a shelf plate, and a shelf plate supporting part attached to a wall surface protrudingly therefrom for supporting the shelf plate, The shelf comprises the shelf plate including a placement surface being provided to place articles and configured to be switchable between a placement state in which the articles can be placed on the placement surface and an upright state in which the articles are raised from the placement state and a bottom surface support part that supports the bottom surfaces of the articles in the upright state. The bottom surface support part is arranged below the placement surface of the shelf plate in the placement state, and the bottom surface support part is separate from the shelf board. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023058682-A (JP)
Title: Acquisition method, computation method, evaluation device, computation device, evaluation program, computation program, recording medium, and evaluation system
IPC: G01N33/68
Filed: 2023-02-16
Abstract: PROBLEM TO BE SOLVED: To provide an evaluation method and others, which allow for providing highly reliable information that can be helpful in knowing the state of prostate cancer. 
     SOLUTION: An evaluation method according to an embodiment disclosed herein involves evaluating the state of prostate cancer in a subject using a concentration level(s) of at least one of thirty one metabolites (1-Me-His, 3-Hydroxykynurenine, 3-Me-His, 5-HydroxyTrp, aABA, aAiBA, ADMA, Aminoadipic acid, etc.) in blood of the subject. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023059962-A (JP)
Title: Splitting tile and sub-image
IPC: H04N19/436
Filed: 2023-02-22
Abstract: PROBLEM TO BE SOLVED: To provide a system and a method for decoding. 
     SOLUTION: A method is executed by at least one processor to decode sub-bitstreams of an encoded video stream, the encoded video stream includes encoded versions of the first sub-image and the second sub-image of an image, the method includes a step of decoding a first sub-image of the image independently of a second sub-image using sub-images and tiling, (i) the first sub-image includes a first rectangular region of the image, the second sub-image includes a second rectangular region of the image, the second rectangular region is different from the first rectangular region, (ii) the first sub-image and the second sub-image each include at least one tile, and (iii) the first sub-image and the second sub-image do not share common tiles. 
     SELECTED DRAWING: Figure 3 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023081929-A (JP)
Title: Fusion cage with integrated fixation feature and insertion feature
Inventor: TODD M MILLER
IPC: A61F2/46
Filed: 2023-03-01
Abstract: To provide a surgical implant system that simplifies surgical procedures and makes the procedures more efficient.SOLUTION: A surgical implant system includes an implant, and a fixation member for securing the implant to a tissue. The implant and the fixation member together form a single monolithic structure. The implant includes an insertion instrument. The implant, the fixation member and the insertion instrument together form a single monolithic structure and are formed from a single material. The implant is monolithically connected to the fixation member at a first frangible connection and is monolithically connected to the insertion instrument at a second frangible material. Each of the frangible connections can be broken when force is applied thereto.SELECTED DRAWING: Figure 1
Patent JP-2023072000-A (JP)
Title: refrigerator
IPC: F25D23/06
Filed: 2023-03-10
Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator which includes a vacuum heat insulation material and achieves high heat insulating efficiency. 
     SOLUTION: A refrigerator 10 of the invention has a side surface vacuum heat insulation material 22, which is disposed near an outer surface of an inner box side surface plate 162, and a foam heat insulation material 23, which is foamed to fill a space between an inner box 16 and an outer box 15, as heat insulation materials incorporated in a heat insulation box body. Further, a spacer 30 is attached to one end side of the side surface vacuum heat insulation material 22. The spacer 30 is disposed between the side surface vacuum heat insulation material 22 and an outer box side surface plate 152. The structure allows the side surface vacuum heat insulation material 22 to insulate a storage room from the outside preferably to achieve further energy saving of the refrigerator 10. 
     SELECTED DRAWING: Figure 4 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023063397-A (JP)
Title: Method and transmitter for transmitting data block in wireless communication system
IPC: H03M13/27
Filed: 2023-03-10
Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for transmitting a data block in a wireless communication system. 
     SOLUTION: The method for transmitting a data block in a wireless communication system comprises the steps of: determining the number of bits (s) and the number of encoders (N ES ) to be allocated to one axis of a signal constellation; encoding an information bit on the basis of the s and the N ES  and generating a coded block; parsing the coded block on the basis of the s and the N ES  and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver. 
     SELECTED DRAWING: Figure 16 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023078369-A (JP)
Title: STABLE MODULATORS OF γc-CYTOKINE ACTIVITY
Inventor: NICHOLAS DOERR
IPC: A61P35/02
Filed: 2023-03-22
Abstract: To provide antagonist peptides that effectively block the pathogenic changes in humans suffering from the diseases mediated by misregulation of γc-cytokine family members.SOLUTION: Disclosed herein are stable peptide antagonists based on the consensus sequence at a γc-subunit binding site to inhibit the activity of γc-cytokines. The peptide antagonists are capable of inhibiting the activity of multiple γc-cytokine family members. The γc-family cytokines are associated with important human diseases, such as leukemia, autoimmune diseases, collagen diseases, diabetes mellitus, skin diseases, degenerative neuronal diseases and graft-versus-host disease (GvHD). Thus, inhibitors of γc-cytokine activity are useful for therapeutic and cosmetic agents as well as research tools.SELECTED DRAWING: None
Patent JP-2023086736-A (JP)
Title: Anticancer composition comprising tumor-specific killer adenovirus and immune checkpoint inhibitor
Inventor: YUN CHAE OK
IPC: A61P43/00
Filed: 2023-03-28
Abstract: To provide, among others, a recombinant adenovirus co-expressing IL-12 and shVEGF, or IL-12 and GM-CSF-Relaxin.SOLUTION: The present invention relates to an anticancer composition comprising a tumor-specific killer adenovirus and an immune checkpoint inhibitor. The recombinant adenovirus having IL-12 and shVEGF, or IL-12 and GM-CSF-Relaxin inserted therein, according to the present invention, exhibits an excellent anticancer effect by enhancing immune functions, and such an anticancer effect has been confirmed to be notably enhanced through concomitant administration with an immune checkpoint inhibitor. Accordingly, the present invention may be used as a key technique in the field of cancer treatment.SELECTED DRAWING: Figure 13
Patent JP-2023073399-A (JP)
Title: Evaluation method and evaluation system
IPC: G01N21/88
Filed: 2023-03-29
Abstract: PROBLEM TO BE SOLVED: To provide an evaluation method and an evaluation system capable of facilitating the grasp of the displacement and damage situation of a surface. 
     SOLUTION: In order to make it possible to identify a crack C1 that may occur on a surface F1 of a structure, measurement points M1 are formed on the surface F1 using a yellow fluorescent paint on top of a white base paint. A photographing device 15 generates an image obtained by photographing each measurement point in a recognizable manner via a bandpass filter 16 that transmits reflected light of blue illumination light to the surface. A control unit 21 of an analysis device 20 compares a first image captured and generated by the photographing device 15 before applying force to the structure with a second image captured and generated by the photographing device 15 in the state where the crack C1 has occurred due to the force applied to the structure, and identifies displacement of the surface F1. 
     SELECTED DRAWING: Figure 1 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023073525-A (JP)
Title: Method for controlling information management system and information management system
IPC: G16H10/40
Filed: 2023-04-03
Abstract: PROBLEM TO BE SOLVED: To support a specialist conference where a plurality of healthcare workers interpret gene information. 
     SOLUTION: An information management system (100) relates schedule information of a specialist conference and participant information showing participants, which are a plurality of healthcare workers who belong to different institutions, to each other, and manages the number of participants on a role-by-role basis on the basis of role information showing roles of the healthcare workers in the specialist conference in the participant information. 
     SELECTED DRAWING: Figure 2 
     COPYRIGHT: (C)2023,JPO&INPIT
Patent JP-2023085473-A (JP)
Title: Multiple input driven loudspeaker
Inventor: ZHOU JIANMING
IPC: H04R9/06
Filed: 2023-04-05
Abstract: To provide a multiple input driven loudspeaker that reduces loudspeaker distortion, improves sensitivity, enhances clarity, and has a compact structure.SOLUTION: A loudspeaker includes a frame 1, a cone 2, main input driving means 3, and a plurality of sub-input drive means 4. The main input driving means is provided between the plurality of sub-input driving means. Each of sub-input driving means has a sub-voice coil 42 and a sub-magnetic circuit unit formed with a sub-magnetic gap, and a plurality of sub-voice coil mounting holes 212 are correspondingly opened in the cone and connected to the corresponding sub-voice coil mounting holes, and a plurality of sub-magnetic circuit mounting holes 12 are correspondingly opened in the frame, and the respective bottoms of the sub-voice coils are inserted into the corresponding sub-magnetic gaps through the corresponding sub-magnetic circuit mounting holes.SELECTED DRAWING: Figure 1
Patent JP-2023087123-A (JP)
Title: game machine
Inventor: OKAMURA GEN
IPC: A63F7/02
Filed: 2023-05-08
Abstract: To provide a game machine capable of increasing a player's interest in a game.SOLUTION: A performance mode displayed on display means by performance mode display means is changed by variable display means, and a notification mode is arranged at the position where the performance mode is displayed, by notification means. When a plurality of performance modes is displayed on the display means, by arranging the notification mode, the variable performance mode is suggested by suggestion control means, so that it is possible for a player to have an interest in the notification mode, thereby increasing the player's interest in a game.SELECTED DRAWING: Figure 1
Patent JP-2023111916-A (JP)
Title: decorative material
Inventor: AOYAMA YUKI
IPC: B32B3/30
Filed: 2023-05-23
Abstract: To provide a decorative material having a design excellent in visual effects.SOLUTION: A decorative material has a texture region in which a plurality of mutually independent projections 20 are aggregated, wherein the projections 20 contains resin binders 23 and brilliant flaky particles 21.SELECTED DRAWING: Figure 2
Patent JP-2023174585-A (JP)
Title: フルオロポリエーテル基含有化合物の製造方法
IPC: C08G65/32
Filed: 2023-05-24
Abstract: 【課題】本開示は、従来よりも低圧下で、且つ高収率で、両末端に活性基を有するフルオロポリエーテル基含有化合物を製造する方法を提供することを目的とする。【解決手段】本開示のフルオロポリエーテル基含有化合物の製造方法は、式（１）TIFF2023174585000013.tif7104で表される化合物に、反応媒体の存在下、還元剤を作用させることにより、式（２）TIFF2023174585000014.tif7104で表される化合物を得ることを含み、前記反応媒体は含フッ素アルコールを含む。【選択図】なし
Patent JP-2023111958-A (JP)
Title: Sleep estimation system, sleep estimation device, and sleep estimation method
Inventor: WATANABE TAKAHIRO
IPC: A61B5/16
Filed: 2023-06-06
Abstract: To improve accuracy in estimating a sleep state.SOLUTION: A sleep estimation system (1) includes: a sensor device (20) having a light emitting part and a light receiving part; input devices (14, 16) for inputting blood stream data of a user; and a control device (11) having an approximator capable of calculating output data (19) indicating the sleep state of the user from the blood stream data. The blood stream data includes data obtained by allowing a frequency spectrum of the output of the light receiving part to be subjected to wavelet transformation.SELECTED DRAWING: Figure 2
Patent JP-2024001860-A (JP)
Title: タマネギの変質検査方法及びタマネギ病原菌同定方法
IPC: G01N33/02
Filed: 2023-06-07
Abstract: 【課題】タマネギの変質の有無または変質の種類の判定、並びに／あるいは、タマネギに感染している病原菌の同定を、実際の生産、加工、流通などの現場で簡便に、高感度かつ高精度で行う。【解決手段】タマネギから発生するガスをニオイセンサアレイへ供給し、当該ニオイセンサアレイから得られる複数のシグナルに基づいて、当該タマネギの変質の有無または変質の種類を判定する、あるいは、当該タマネギに感染している病原菌を同定する。上記ニオイセンサアレイは、特定のニオイ分子に応答する異なる感応膜を有する複数の表面応力センサ素子を有し、上記複数のシグナルは、当該複数の表面応力センサ素子から得られる。【選択図】なし
Patent JP-2024012115-A (JP)
Title: スパッタリング装置およびこれを利用したスパッタリング方法
IPC: C23C14/34
Filed: 2023-06-23
Abstract: 【課題】大面積スパッタリング工程で蒸着ムラを減少させたスパッタリング装置およびスパッタリング方法を提供する。【解決手段】スパッタリング装置は、基板固定部３１０と、基板固定部と対向して位置するターゲット固定部３００と、ターゲット固定部に第１方向に離隔して複数個が位置するスパッタリングターゲット２００と、を含み、それぞれのスパッタリングターゲットは、第２方向ＤＲ２に並んで位置する複数個の部分スパッタリングターゲットと、前記部分スパッタリングターゲットの間に位置する分割面と、を含み、それぞれのスパッタリングターゲットの分割面は、他のスパッタリングターゲットの分割面と第１方向ＤＲ１に並んで位置しない。【選択図】図１
Patent JP-2023115288-A (JP)
Title: Fault detection method, fault detection system, vehicle, electronic equipment and storage medium
Inventor: LIAN YUTIAN
IPC: G01M17/007
Filed: 2023-06-29
Abstract: To provide a fault detection method, a fault detection system, a vehicle, electronic equipment and a storage medium for detecting a vehicle fault by collecting a sound signal on the vehicle.SOLUTION: The fault detection method comprises the steps of: collecting sound signals through a microphone module so as to position relative coordinates of at least one noise source and generate at least one corresponding voiceprint; inputting the voiceprint into a sound analysis module to check a noise type corresponding to the voiceprint; matching the relative coordinates of the noise source with a modeling image of the vehicle to determine absolute coordinates of the noise source in the vehicle; and according to the noise type of the noise source and the absolute coordinates of the noise source in the vehicle, determining a fault part of the vehicle.SELECTED DRAWING: Figure 1
Patent JP-2023139000-A (JP)
Title: Methods and compositions for treating sleep apnea
Inventor: D ANDREW WELLMAN
IPC: A61K45/06
Filed: 2023-06-30
Abstract: To provide compositions and kits for the treatment of conditions with pharyngeal airway collapse while the subject is in a non-fully conscious state, e.g., snoring and sleep apnea.SOLUTION: A pharmaceutical composition comprises (i) a norepinephrine selective reuptake inhibitor, (ii) a muscarinic receptor antagonist, and (iii) a pharmaceutically acceptable carrier. The pharmaceutical composition is used for treating a subject having a condition with pharyngeal airway collapse while the subject is in a non-fully conscious state.SELECTED DRAWING: None
Patent JP-2023129469-A (JP)
Title: Rotation transmission structure, catheter and guide wire
Inventor: MIYATA AYUKO
IPC: A61M25/00
Filed: 2023-07-12
Abstract: To provide a technology capable of improving rotation transmission performance of a rotation transmission member and adjusting rigidity of a rotation transmission structure.SOLUTION: A rotation transmission structure 20 includes a coil body 30 formed by winding of a wire 31, and a reinforcement body 40 that connects between adjacent wires 31 of the coil body 30. The reinforcement body 40 is provided such that rigidity in a prescribed area 21 in the longer direction is lower than rigidity in other areas 22 in the coil body 30 with the wires 31 connected to each other.SELECTED DRAWING: Figure 4
Patent JP-2023153797-A (JP)
Title: Maintenance support system and maintenance support method for railway vehicle
Inventor: NAITO SHUNYA
IPC: B60L3/00
Filed: 2023-07-12
Abstract: To allow proper timing for performing filter replacement to be grasped in advance, while reducing the replacement frequency of the filter for removing dust from the air used by the equipment system such as a storage cell and the like, in a railway vehicle.SOLUTION: A maintenance support system of a railway vehicle which supports maintenance of a filter for removing dust from an air used by an equipment system mounted on a railway vehicle, estimates maintenance timing for performing maintenance of the filter with respect to filter clogging by dust, using a clog index showing a clogging situation of the filter by the dust, and notifies of, as the estimated maintenance timing, a timing of vehicle maintenance that is planned, on the basis of a vehicle maintenance plan of the railway vehicle, to be performed immediately before a timing when the clog index reaches a clog index upper limit value of when a temperature of the equipment system reaches an upper limit.SELECTED DRAWING: Figure 11
Patent JP-2023134764-A (JP)
Title: Method for detecting foreign material, and apparatus and system therefor
Inventor: PARK JAE HEE
IPC: H02J50/60
Filed: 2023-07-20
Abstract: To provide a method for detecting a foreign material while minimizing unnecessary power waste and a heating phenomenon due to a foreign object so as to allow effective and accurate detection of the foreign material, and a device and system therefor.SOLUTION: The method for detecting a foreign material in a wireless power transmitter provided with a resonance circuit for wirelessly transmitting power comprises the steps of: detecting an object disposed in a charging area; measuring a quality factor value of a resonance circuit, following the detection of the object; identifying a wireless power receiver by sending out a detection signal; determining a critical value for detecting a foreign material, on the basis of a reference quality factor value received from the identified wireless power receiver; and judging whether the foreign material exists, by comparing the measured quality factor value and the determined critical value. The critical value is determined by applying a weight which increases in accordance with the reference quality factor value.SELECTED DRAWING: Figure 9a