baber/WOPTO huggingface dataset:
Patent JP-2013543742-A (JP)
Title: 骨組織内に挿入される縫合糸の固定デバイス
IPC: A61B17/04
Filed: 2011-10-13
Abstract: 骨組織内に挿入される縫合糸の固定デバイスは、第１縫合糸（４）を少なくとも挿通可能な第１アイレット（１０）、スロット、又は小穴を少なくとも備える第１部分（１１）と、骨の皮質部に形成された骨貫通型の座部又はホール（５）に安定的に結合されるようにされた少なくとも第２部分（１２）と、を有する。第２部分（１２）は、台座又はホール（５）との有効な結合が可能になるように弾性変形可能である。
Patent JP-2014503339-A (JP)
Title: 医療用分離装置
IPC: B01D15/00
Filed: 2011-10-18
Abstract: 【課題】分離装置のハウジングが、分離媒体を充填する側に充填連結具を有する医療用分離装置であって、コンパクトなハウジング設計を有しかつパッケージングを低減させ並びに輸送および貯蔵スペースを減少させてコスト低減できる医療用分離装置を提供することにある。 【解決手段】本発明は、医療用分離装置、医療用分離装置の製造方法および医療用分離装置の使用方法に関し、分離装置のハウジングは、ハウジングに接線方向に取付けられた横方向充填ネックを有し、かつ分離媒体の充填に使用できる。 【選択図】図２ａ
Patent JP-2013544718-A (JP)
Title: 喫煙品用パック
IPC: B65D5/66
Filed: 2011-09-30
Abstract: ヒンジ式蓋付きパック（１）を開示する。このパック（１）は、胴体（２）と蓋（９）とを含み、この蓋はパックの後壁に沿って胴体にヒンジ式に接続され、蓋（９）と胴体（２）の間で閉鎖線を形成し、この閉鎖線は、パックの後壁からパックの対向する側壁および前壁を横断して延びている。閉鎖線（８）は、後壁に対して第１の角度（「Ａ」、「Ｃ」）で後壁から離れて各側壁を横断して延びる第１の部分（３０）を有する。また閉鎖線（８）は、後壁に対して第２の角度（「Ｂ」、「Ｄ」）で第１の部分からパックの前壁へと延びる第２の部分（３１）を有する。
Patent JP-2013542531-A (JP)
Title: 複雑な表面形状用のソリッドステートタッチセンサを備えた制御システム
IPC: G08G1/16
Filed: 2011-10-25
Abstract: デバイスや機器のための制御要素と一体的に形成されるソリッドステートタッチセンシングシステム。制御要素は複雑な表面の外形を有する。システムは制御要素に対するユーザの接触の特徴を示すリアルタイムパラメータを決定することができ、また、装置や機器を制御するか、機器のユーザに対して情報や警告を提供するための制御信号を生成することができる。
Patent JP-2014503935-A (JP)
Title: 真空アークプラズマを輸送するための方法及び装置
IPC: H05H1/40
Filed: 2011-10-31
Abstract: 本発明は、高品質コーティングを生成するための真空アークカソード浸食プラズマの流れを形成する技術に関する。プラズマ流は、複数の電磁気的コイルを使用して生成される輸送磁界の作用の下でアークエバポレータからプラズマ源の出口へと、プラズマ−光学システム内を輸送される。輸送磁界は、一定の磁界およびプラズマ源の構造要素の複数の表面からプラズマを偏向させるように可変とされる複数の追加磁界の重ね合わせにより生成される。対応する追加磁界の強度は、プラズマ流がプラズマ源の構造要素の面に接近するにつれて増加され、プラズマ流がその構造要素の面から離れるにつれて減少される。上述の方法を実装する装置においては、真空アーク電源（１５）がアノード（２）へと、アノードを取り囲んだ電磁気的コイル（１６）の回巻きを介して接続される。プラズマ−光学システムの線形実施形態ではアノード（２）の内側のチューブの導電性の領域は、電磁気的偏向コイル（１２）の回巻きの一端に電気的に接続されている。この回巻きの他端は、真空アーク電源（１５）の正端子に接続されている。上述の方法および装置を使用することで、粗大粒子フリーのプラズマの損失を著しく減少させる。 【選択図】  図１
Patent JP-2014500699-A (JP)
Title: バッテリー充電の検出方法及び充電検出装置
IPC: H02J7/04
Filed: 2011-02-21
Abstract: 本発明は、バッテリー充電の検出方法と充電検出装置を開示し、当該方法は、バッテリーの充電パラメータと検出パラメータを設定するステップＳ１と、現在のバッテリーの電圧を検出するステップＳ２と、検出された現在のバッテリーの電圧がフル充電電圧以上である場合、予め設定された時間に応じて電圧を検出するステップＳ４１と、検出された電圧が予め設定された時間の後にフル充電電圧より低く、サンプリングされた電圧が全て充電臨界電圧より高く、そして単調増加傾向が現れない場合、バッテリーの現在の充電時間、即ち第１の充電時間を取得するステップＳ８と、第１の充電時間を充電パラメータ中の定格充電時間と比較するステップと、第１の充電時間が定格充電時間より長い場合、充電過程に充電故障が発生したと確定するステップとを含む。当該方法及び装置により、バッテリー充電過程で発生した充電故障を検出できる。
Patent JP-2014508122-A (JP)
Title: 白金−カルベン錯体の製造方法
IPC: C07F19/00
Filed: 2011-12-22
Abstract: 本発明は、白金−カルベン錯体の製造方法に関する。
Patent JP-2014504824-A (JP)
Title: Ｉｓｍ向けの周波数情報を基地局に伝送する方法及び装置
IPC: H04W24/10
Filed: 2012-01-06
Abstract: ユーザー装置におけるデバイス内共存干渉を処理する方法及び装置を提供する。一実施形態で、上記方法は、非サービングＬＴＥ周波数のリストを基地局から受信すること、構成された非サービングＬＴＥ周波数に対する測定を遂行するために非サービングＬＴＥ周波数を構成すること、及びＩＳＭ周波数に対するＩＳＭアクティビティが進行中である場合、ＩＳＭ周波数と少なくとも一つの非サービングＬＴＥ周波数との間のデバイス内共存干渉の可能性を検出することを含む。
Patent JP-2014521493-A (JP)
Title: ガス分離膜
IPC: B01D71/26
Filed: 2012-03-09
Abstract: 第１親水性ポリマー溶液を置き；  第１親水性ポリマー溶液上に、第２の、異なる親水性ポリマー溶液を置き、それにより、２層ポリマー溶液を形成し；  該第２の、異なる親水性ポリマー溶液を水と接触状態にして該緻密層を形成することにより、該２層ポリマー溶液を正浸透膜および圧力遅延浸透膜の一方に形成し；   該正浸透膜および圧力遅延浸透膜の一方に、第１および第２親水性ポリマー溶液よりもよりｐＨ耐性の、第３の、異なる親水性ポリマーの薄層をコーティングし、その上に緻密拒絶層を形成し；そして、  コーティングした正浸透膜およびコーティングした圧力遅延浸透膜の一方を高ｐＨ溶液に露出することを含むガス分離膜を形成する方法。前記方法により形成されたガス分離膜。
Patent JP-2014503168-A (JP)
Title: 低電圧制御電源回路及びその駆動制御方法
IPC: H02M3/155
Filed: 2011-01-24
Abstract: 低電圧制御電源回路及びその駆動制御方法を提供する。回路は、補助電源１６と、高電圧スタータユニット１９と、スイッチング回路１８と、制御回路１５とを備える。回路が起動されると、スイッチング回路１８の蓄積コンデンサC4が高電圧スタータユニットによって充電され、制御回路に低電圧電源を供給し、その結果制御回路が完全に起動される。回路が正常動作状態になった後、制御回路は蓄積コンデンサの電圧を検出し、同時にスイッチング回路を制御して蓄積コンデンサを充電し、その結果制御回路に対して供給される安定した低電圧電源が得られる。電源効率を低下させることなく、回路は簡素化され、コストが低減化される。 【選択図】図１
Patent JP-2014507136-A (JP)
Title: ＮａＶ１．７ノックアウトマウスとそれらの使用
IPC: G01N33/50
Filed: 2012-01-18
Abstract: 生存可能なグローバルＮａ Ｖ １．７ −／− ノックアウトマウス、およびグローバルＮａ Ｖ １．７ −／− ノックアウトマウスの繁殖コロニーが開示される。また、Ｎａ Ｖ １．７ −／− ノックアウトマウスにより産生された、機能性Ｎａ Ｖ １．７をコードしない単離マウス配偶子；Ｎａ Ｖ １．７ −／− ノックアウトマウスから単離された単離Ｎａ Ｖ １．７ −／− マウス細胞、またはその子孫細胞；および、Ｎａ Ｖ １．７ −／− ノックアウトマウスから得た初代細胞培養物または二次細胞株および組織もしくは臓器外植片またはそれらの培養物、も開示される。さらに、最初、単離Ｎａ Ｖ １．７ −／− マウス細胞および骨髄腫細胞の融合により形成されたハイブリドーマ、および、抗体を産生する方法も開示される。また、Ｎａ Ｖ １．７ −／− ノックアウトマウスを使って検証された、有望なＮａ Ｖ １．７阻害剤の選別、および試験Ｎａ Ｖ １．７阻害剤化合物の用量範囲探索に有用なアッセイが開示される。 【選択図】図８Ｂ
Patent JP-2014100917-A (JP)
Title: Method for manufacturing a laminate, laminate, and packaging container using the same
Inventor: MANABE TOKUJI
IPC: B29C65/20
Filed: 2014-01-07
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a laminate capable of providing excellent environmental measures and energy conservation measures by completely eradicating the generation of VOCs (volatile organic compounds) because of refrainment from uses of adhesives and anchor coating agents; a laminate; and a packaging container using the laminate.SOLUTION: Either substrate 5 selected from between a first substrate and a second substrates unwound respectively from roll bodies 21 and 22 provided by winding a first substrate 1 and a second substrate 6 consisting of different types of thermoplastic resin films or cellophane films possesses a surface on which a heat-adhesive modified layer has been formed as a result of surface modification by an atmospheric plasma treatment apparatus 23. The other substrate 8 possesses a surface air-corona-treated by an air corona treatment apparatus 24. Both substrates are heated and pressed by a heating roll 25 and continuously pasted without coating thereon an adhesive and an anchoring agent in a state where the surface on which the heat-adhesive modified layer has been formed opposes the air-corona-treated surface.
Patent JP-2015132902-A (JP)
Title: Electronic conference system and program of the same
Inventor: KOYANO TOMOFUKU
IPC: H04N7/15
Filed: 2014-01-09
Abstract: PROBLEM TO BE SOLVED: To provide improvement in ease-of-use with respect to a modification to a minute after a conference is ended.SOLUTION: An electronic conference system 1 preparing a minute comprises: a host device; and a participant terminal that is connected to the host device with a radio and/or wired network. The participant terminal includes transmission means for transmitting an own terminal ID and user name, and conference information pertain to own remarks to the host device, and the host device includes storage means for storing the own terminal ID, user name and conference information transmitted from the participant terminal in association with time information, and preparation means for, after a conference is ended, preparing a minute on the basis of the own terminal ID, user name and conference information stored in association with the time information.
Patent JP-2015131548-A (JP)
Title: Seating state determination device and air bag system
Inventor: NAKAZAKI SHIGERU
IPC: B60N2/90
Filed: 2014-01-10
Abstract: PROBLEM TO BE SOLVED: To provide a seating state determination device which does not need difficult maintenance, has an inexpensive structure, and is less likely to cause false recognition.SOLUTION: A seating state determination device is used to determine a seating state in a seat 10 at a vehicle including the seat 10 and a seat belt mechanism 20. The seating state determination device includes: a displacement sensor 50 capable of detecting vertical displacement of each S shaped spring 44 supporting a cushion pad 30 relative to a support frame 42 supporting the cushion pad 30 of the seat 10; a belt tension sensor 60 capable of detecting tension of a belt 21 of the seat belt mechanism 20; and a determination processing part 70 which determines the seating state on the seat 10 on the basis of the displacement detected by the displacement sensor 50 and the tension detected by the belt tension sensor 60 and outputs an output signal indicating the seating state.
Patent JP-2015134396-A (JP)
Title: Control system for controlling industrial robot, control device, method for manufacturing weldment and program
Inventor: FUKUNAGA ATSUSHI
IPC: B25J13/08
Filed: 2014-01-17
Abstract: PROBLEM TO BE SOLVED: To reduce work of creating programs when an industrial robot and peripheral devices are made to operate in conjunction with each other.SOLUTION: The welding robot system includes: a first control device 30 for controlling a first welding robot and peripheral devices; and a second control device 60 connected to the first control device 30 through a network, for controlling a second welding robot. The first control device 30 includes: a first teaching program storage unit 31 for storing teaching programs in which operation to be executed by the first welding robot and the peripheral devices is described; a first route calculation unit 33 for, on the basis of the teaching program, creating information about operation of the first welding robot and the peripheral devices; and a first robot drive unit 34 for controlling the first welding robot and the peripheral devices. The second control device 60 includes: a second command interpretation unit 62 for obtaining the teaching program; a second route calculation unit 63 for, on the basis of the teaching program, creating information about operation of the second welding robot, so that the second welding robot works in conjunction with the peripheral devices; and a second robot drive unit 64 for controlling the second welding robot.
Patent JP-2015141211-A (JP)
Title: Shutter device, shutter device assembly and frequency adjustment device
Inventor: NANBA TERUAKI
IPC: G03B9/10
Filed: 2014-01-27
Abstract: PROBLEM TO BE SOLVED: To provide a shutter device, shutter device assembly and frequency adjustment device that can highly accurately position a shutter unit.SOLUTION: A shutter device 1 comprises: a shutter holding unit 523; a shutter unit 51 that is attached to the shutter holding unit 523; and a positioning mechanism 6 that positions the shutter unit 51 with respect to the shutter holding unit 523. The positioning mechanism 6 includes: an X-positioning part 61 that positions an X-axis direction; a Y-positioning part 62 that positions a Y-axis direction; a Z-positioning part 63 that positions a Z-axis direction; and a θ-positioning part 64 that positions a position around the Z-axis.
Patent JP-2015141066-A (JP)
Title: Photometric device and image display device
Inventor: GOMI TSUGIO
IPC: G01M11/00
Filed: 2014-01-28
Abstract: PROBLEM TO BE SOLVED: To provide a photometric device capable of appropriately correcting a display color and an image display device using the photometric device.SOLUTION: A photometric device 30 comprises: an enclosure 31 having a first light-shading part 311 provided with a first light incident hole 331 for letting light from a first direction pass through and a second light-shading part 312 provided with a second light incident hole 332 for letting light from a second direction different from the first direction pass through; a wavelength variable interference filter 5, provided inside the enclosure 31, for radiating a light of prescribed wavelength among the incident light; and light-receiving parts (photosensors 341, 342), provided inside the enclosure 31, for receiving the light radiated from the wavelength variable interference filter 5, the light-receiving parts (photosensors 341, 342) receiving the light of the prescribed wavelength of the incident light injected from the first light incident hole 331 to the wavelength variable interference filter 5 and the light of the prescribed wavelength of the light injected from the second light incident hole 332 to the wavelength variable interference filter 5 independently of each other.
Patent JP-2015142115-A (JP)
Title: Circuit-equipped suspension board assembly sheet
Inventor: TERADA NAOHIRO
IPC: H05K1/02
Filed: 2014-01-30
Abstract: PROBLEM TO BE SOLVED: To provide a circuit-equipped suspension board assembly sheet excellent in handleability, by suppressing warp of a margin area.SOLUTION: A circuit-equipped suspension board assembly sheet 1 includes an assembly installation areas 4 where a plurality of circuit-equipped suspension boards 9 are provided in the lateral direction at intervals, and a margin area 7 provided on the opposite sides of the assembly installation areas 4 in the longitudinal direction. In the assembly installation area 4, a clearance groove 15 is provided between adjoining circuit-equipped suspension boards 9. Furthermore, a fragile portion 20 is provided in the margin area 7.
Patent JP-2015144075-A (JP)
Title: Switch packing and switch device employing the same
Inventor: SEIZAKI DAISUKE
IPC: H01H13/14
Filed: 2014-01-31
Abstract: PROBLEM TO BE SOLVED: To provide a switch packing capable of easily adjusting operational feelings, and a switch device employing the same.SOLUTION: A switch packing 5 is substantially configured by including a switch mechanism section, for example. The switch mechanism section includes: a base part 50; a plurality of wall parts provided so as to rise from a surface 50a of the base part 50; and a plurality of protrusions provided in the wall parts to be paired so as to protrude toward at least either a side of an area side surrounded by the plurality of wall parts or an opposite side of the area. An operation button is mounted in an upper casing 3 by being inserted into the area of the plurality of wall parts exposed from an opening of the upper casing 3 as a mounted member. By deforming the wall parts and the protrusions held between the operation button and the upper casing 3, the switch mechanism section generates operational feelings of the operation button.
Patent JP-2014187687-A (JP)
Title: Device and method for extracting highlight scene of moving image
Inventor: MIWA SHOTARO
IPC: G11B27/02
Filed: 2014-01-31
Abstract: PROBLEM TO BE SOLVED: To extract a specified highlight scene including a face of a person from a moving image.SOLUTION: A highlight scene extracting device includes: a frame extracting circuit 2 which detects a face of a person from a frame image; a scene composition determining circuit 4 for generating a scene composition feature C including a plurality of feature values determined by a position and a size of the detected face in the frame image; a scene storage device 5 which previously stores a range of the plurality of feature values determined by the position and the size of the face of the person in at least one specified highlight scene as a scene composition condition D; a highlight scene extracting device 6 for determining whether the feature value of the scene composition feature C is within the range of the feature value of the scene composition condition D or not; and an index generation circuit 7 for giving an index of the highlight scene to the frame image when the feature value of the scene composition feature C is within the range of the feature value of the scene composition condition D.
Patent JP-2014123964-A (JP)
Title: Concentrator for multiplexing access point to wireless network connections
Inventor: DAMANJIT SINGH
IPC: H04W68/00
Filed: 2014-02-03
Abstract: PROBLEM TO BE SOLVED: To enable multiplexing communications from multiple downstream access points to one or more mobility management entities (MME).SOLUTION: A concentrator component is provided that can establish a single transport layer connection with a MME along with multiple application layer connections over the single transport layer connection for each of multiple downstream access points and/or related mobile devices. The downstream access points and/or mobile devices provide identifiers, such as tracking identifiers, to the concentrator component, which can utilize the identifiers to track communications with the MME.
Patent JP-2015147471-A (JP)
Title: Vehicular control device
Inventor: OTSU HIDEKAZU
IPC: B60R16/033
Filed: 2014-02-05
Abstract: PROBLEM TO BE SOLVED: To provide a vehicular control device that has a function capable of surely preventing power supply from a power storage battery to the device from being continued even when a failure occurs while an alarm is kept output to the device by an alarm function.SOLUTION: In a vehicular control device 1, a power source-part semiconductor switch 12 as power source interruption means having a latch function for holding an instruction for interrupting power supply to a clock IC9, is provided at a power source part of the clock IC9, alarm monitoring and power source control means of a micro computer 4 periodically monitors output of activation signals by alarm output ALM from the clock IC9 and determines whether or not abnormality occurs and thereby outputs to the switch 12 a power source-interruption control signal for instructing interruption of the power supply to the clock IC9. The switch 12 receives the power source-interruption control signal and then interrupts the power supply to the clock IC9, so that power supply from a low voltage power storage battery 5 to the device 1 can be prevented from being continued, thereby effectively restraining the low voltage power storage battery 5 from being used up.
Patent JP-2014116633-A (JP)
Title: Light-emitting element, light-emitting device, lighting device and electronic apparatus
Inventor: INOUE HIDEKO
IPC: H01L51/50
Filed: 2014-02-06
Abstract: PROBLEM TO BE SOLVED: To provide a light-emitting element having a peak of light emission near 620 nm because wave length of light being acknowledged as a good red color is a wave length near 620 nm.SOLUTION: A light-emitting element, a light-emitting device and an electronic apparatus are formed by employing an organometallic complex, shown by a general formula (G1), as guest material and employing a low molecular compound as host material.
Patent JP-2015148102-A (JP)
Title: Opening and closing device for vehicular door
Inventor: SETO NAOYA
IPC: B60J5/06
Filed: 2014-02-07
Abstract: PROBLEM TO BE SOLVED: To improve connecting operation of a cable derived from a door opening and closing driving unit to a moving member.SOLUTION: A door opening and closing driving unit 4 is divided into a main driving part 42 comprising a motor 421 and a driven part 41 to which electric diving power from the motor 421 is input and which can transmit the input electric diving power to a moving member 9 movably arranged on a guide rail 2 via cables 10, 11. An opening part P1 through which the driven part 41 is inserted from outside of a panel P into inside of a vehicle body is arranged on the panel P of the vehicle body. The main driving part 42 can be connected on the driven part 41 from inside of the vehicle body in a state where the driven part 41 is inserted into the opening part P1 so as to be attached on the panel P. Thus, the cables 10, 11 can be connected to the moving member 9 in a stage before the guide rail 2 is fixed onto the panel P of the vehicle body.
Patent JP-2015149039-A (JP)
Title: State notification method, device, and program
Inventor: KATAGIRI TAKU
IPC: G08B25/04
Filed: 2014-02-10
Abstract: PROBLEM TO BE SOLVED: To detect the concrete behavior change of a person to be monitored while protecting the privacy of the person to be monitored concerning a state notification method, device and program for reporting the situation of the person to be monitored.SOLUTION: An alarm output section 104 determines the type of an alarm for reporting the state of a person 108 to be monitored in accordance with the descendent or ascendent movement of the position of the head detected on the basis of pickup image data from an imaging device 105 by a head movement state detection section 102 and the state of a sound detected by a sound state detection section 103 on the basis of voice data from a sound collection device 106. Then, an alarm output section 104 outputs the determined alarm to, for example, a management terminal 107 connected via the Internet and a radio LAN.
Patent JP-2015149462-A (JP)
Title: Housing assembling structure and housing assembling method
Inventor: KAMIYA TAKASHI
IPC: H05K5/03
Filed: 2014-02-10
Abstract: PROBLEM TO BE SOLVED: To provide a housing assembling structure and a housing assembling method with which an assembling worker can easily and highly-precisely perform an assembling work of a housing constructed by assembling a cover with a case.SOLUTION: Two projections 32a, 32b are formed on a turning support face 32 in a case 20, the projections 32a, 32b having arcuate cross-sections in a direction perpendicular to the longitudinal direction of the turning support face 32. A hook portion 47 is constructed by a confronting face 42 confronting the turning support face 32 and a joint piece 46 in a cover 40. Under the state in which the corner portions of the hook portion 47 are brought into contact with both of the projections 32a, 32b, the cover 40 is turned around the contact portions with both of the projections 32a, 32b as the turning center so that engaging end portions 41d and cut-out portions 43a, 44a are engaged with engaging projections 33a, 34a and engaging projections 33b, 34b, whereby the cover 40 is assembled with the case 20, thereby forming the housing 11.
Patent JP-2015154197-A (JP)
Title: Switching element driver
Inventor: ITO HAJIME
IPC: H03K17/16
Filed: 2014-02-13
Abstract: PROBLEM TO BE SOLVED: To provide a switching element driver having a level shift circuit which can suppress a change of a signal transmission time if a power supply surge occurs.SOLUTION: The switching element driver includes a displacement current circuit (2) for making each current flow (IPP2, INN2) corresponding to a displacement current (ICPLS), on the occurrence of a surge in a first voltage (VB), which flows in a series circuit of an input switching element (NHVLS) and a pull-up resistor (RLS) constituting the level shift circuit, caused by the surge. The displacement current circuit (2) is connected between the pull-up resistor (RLS) and the input switching element (NHVLS) of the series circuit.
Patent JP-2015151464-A (JP)
Title: Polymer semiconductor layer and organic electronic device prepared using the same
Inventor: KIDO JUNJI
IPC: H01L51/46
Filed: 2014-02-14
Abstract: PROBLEM TO BE SOLVED: To provide a polymer semiconductor layer that has excellent hole injection characteristics and can be reduced in resistance.SOLUTION: A semiconductor layer comprises a polythiophene represented by general formula (1), and a boron derivative represented by general formula (2) or (3).
Patent JP-2015155850-A (JP)
Title: Control device of internal combustion engine
Inventor: HASHIDA TATSUHIRO
IPC: G01N27/416
Filed: 2014-02-20
Abstract: PROBLEM TO BE SOLVED: To provide a control device of an internal combustion engine estimating sulfur concentration in fuel by using a limiting current type gas sensor disposed in an exhaust passage of the internal combustion engine and being capable of notifying a user of high sulfur concentration when the sulfur concentration is high. 
     SOLUTION: A control device of an internal combustion engine performs an increase and a decrease of a voltage applied to an electrode of a limiting current type gas sensor and estimates actual sulfur concentration in fuel of the internal combustion engine by using air-fuel ratios detected a plurality of times while the voltage is being increased and a waveform feature value representing a feature of a waveform of a current flowing through the electrode of the gas sensor while the voltage is being decreased. The control device notifies a user of the sulfur concentration higher than a predetermined threshold value when the sulfur concentration is higher than the predetermined threshold value. 
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