baber/WOPTO huggingface dataset:
Patent KR-20160010848-A (KR)
Title: 데이터 재전송 처리 방법 및 그 장치
Inventor: PARK KYU JIN
IPC: H04L1/18
Filed: 2015-05-11
Abstract: 본 발명은 데이터 재전송 처리 방법 및 그 장치에 관한 것이다. 보다 상세하게는, 비면허대역 셀을 이용하여 통신을 수행하는 단말 및 기지국의 HARQ(Hybrid automatic repeat request) 동작 방법 및 장치에 관한 것이다. 특히, 본 발명은 단말이 데이터 재전송을 처리하는 방법에 있어서, 비면허대역 셀에서 하향링크 데이터 수신 또는 상향링크 데이터 전송을 수행하는 단계와 하향링크 데이터 수신 또는 상향링크 데이터 전송이 실패하는 경우, HARQ(Hybrid automatic repeat request) 재전송을 위한 스케줄링 정보를 포함하는 하향링크 제어정보를 수신하는 단계; 및 면허대역 셀에서 하향링크 데이터 또는 상향링크 데이터에 대한 HARQ 재전송 동작을 수행하는 단계를 포함하되, 비면허대역 셀은 하나 이상의 통신시스템이 공유하는 비면허대역의 주파수를 사용하는 셀인 방법 및 장치를 제공한다.
Patent KR-20160134149-A (KR)
Title: Controlling Method of Camera Dolly having Automatic Navigation System
Inventor: YOO HWAN SOO
IPC: H04M1/725
Filed: 2015-05-14
Abstract: The present invention relates to a method for controlling a camera dolly including an automatic navigation system through a smartphone. The smartphone and the camera dolly serve as a client and a server, respectively, perform Wi-Fi communication, and the smartphone includes a user interface program for controlling movement of the camera dolly through communication with the camera dolly. There is an effect of controlling by a control technique more intuitive than the previous system, and it is easily interlocked with a smartphone application to collectively monitor and control a maximum of three dollies in real time, such as editing, storing, and reproducing.
Patent KR-20160135423-A (KR)
Inventor: HA KYOUNG KU
IPC: F04D29/42
Filed: 2015-05-18
Abstract: The present invention relates to a centrifugal compressor for a fuel cell. The centrifugal compressor for a fuel cell compresses air through the wing of an impeller rotating at high speed, wherein the air flows through a flow path formed between the hub of an impeller and one side of a shroud. The provided centrifugal compressor for a fuel cell has effects of: switching over to an operation area of a low flow rate at or below a surge line using the same rotation number as an existing compressor only with the replacement of a shroud; and securing the durability of a bearing at the same level as the existing compressor by suppressing an increase in the rotation number. For the above, the centrifugal compressor for a fuel cell further includes an uneven inlet unit and an uneven outlet unit individually having protrusions on a shroud surface near an inlet and an outlet adjacent to the wing of the impeller.
Patent KR-20160135493-A (KR)
Title: A wearable device
Inventor: KIM IK SOO
IPC: H01Q1/24
Filed: 2015-05-18
Abstract: Disclosed is a wearable device for minimizing high frequency signal loss. According to the present invention, in the wearable device, an antenna unit is integrated with a timing control board to be connected to each other.
Patent KR-20160136712-A (KR)
Title: 마이크로웨이브 균일분산 시스템을 적용한 3차원 승화전사 프린터
Inventor: JEONG BONG GEON
IPC: B41J2/315
Filed: 2015-05-20
Abstract: 본 발명은 마이크로웨이브 균일분산 시스템을 적용한 3차원 승화전사 프린터에 관한 것으로 상세하게는 2450MHz 마이크로파를 사용하여 입력된 전사인쇄 패턴에 따라 균일하게 특정 소재에 전사하는 장비로, 전사지와 소재를 밀착시키는 진공 챔버를 구비하고 마이크로파와 균일분산시스템을 적용한 히팅장치, 전사소재 안착을 위한 지그 및 외부 하우징으로 구성되며 유해 전자파 발생을 차단하기 위한 EMI FILTER(전자파 필터)를 포함하는 3차원 승화전사 프린터를 제공하여 다양한 소재의 작업조건 온도에 신속하게 도달하고 온도 범위를 넓게 하여 작업의 효율성과 확장성을 향상할 수 있도록 한 것이다.
Patent KR-20160137265-A (KR)
Inventor: LEE SEUNG JAE
IPC: C07D209/82
Filed: 2015-05-22
Abstract: The present invention relates to a compound which is represented by chemical formula 1 and is used for organic photoelectronic devices. The present invention further relates to an organic photoelectronic device including the same, and a display device including the organic photoelectronic device. The detailed description on the chemical formula is defined in the present specification.
Patent KR-20160139149-A (KR)
Title: Integrated monitoring and controlling system for ballast water and method using the same
Inventor: JI SUK JOON
IPC: B63B43/06
Filed: 2015-05-27
Abstract: The present invention relates to an integrated monitoring and control system for vessel ballast water, and a method using the same. The system includes: a step (1) of confirming valve state information in real time and transmitting valve on/off signals to a valve control system remotely controlling and supplying ballast water, which is the seawater, from a sea chest of a vessel to each ballast water tank in order to maintain the gravity center of the vessel; a step (2) of controlling and monitoring operation and state information of a ballast water processing system sending the ballast water to the ballast water tank by removing pollutants through physical or chemical processing procedures in accordance with an inflow signal of the ballast water flowing from the sea chest through the remote control of the valve control system; and a step (3) of monitoring information of a water level measurement system providing information to a user by precisely measuring and directing a water level of the ballast water flowing into the ballast water tank.
Patent KR-20160139740-A (KR)
Inventor: AHN SEONG HOON
IPC: A61G5/14
Filed: 2015-05-28
Abstract: The present invention relates to an electric wheelchair. According to an embodiment of the present invention, the electric wheelchair comprises: a motion detection unit to detect a tilt and rotation of a head; a transmitting unit to transmit angle data for the tilt and the rotation of the head detected by the motion detection unit; a power source unit to supply power to the motion detection unit and the transmitting unit; an operating part including an operating control unit to receive the tilt and the rotation of the head detected from the motion detection unit to calculate the angle data and transfer the calculated angle data to the transmitting unit; a body; a receiving unit to receive the angle data from the transmitting unit; a switch unit which includes one or more switches and generates switch operation data combined with the angle data transmitted by the operating part; a drive unit to drive a wheelchair; and a wheelchair part including a wheelchair control unit to combine the angle data received from the receiving unit and the switch operation data inputted from the switch unit to control drive of the drive unit.
Patent KR-20160130130-A (KR)
Title: the hybrid joint construction between column and beam, the hybrid joint construction between girder and beam
Inventor: HONG WON KEE
IPC: E04B1/19
Filed: 2015-06-03
Abstract: The present invention provides a hybrid joint structure of a column and a beam. The hybrid joint structure of a column and a beam comprises: columns (100) which selectively have steel frames and allow column plates (110) to be coupled to the outer surface of column concrete; and a beam (200) which selectively has a steel frame and allows beam plates (210) to be coupled to the ends thereof, thereby the beam (200) is self-leveled and coupled to the accurate positions of the columns (100) by the weight thereof.
Patent KR-20160144156-A (KR)
Inventor: KIM DONG WOO
IPC: H01Q1/22
Filed: 2015-06-08
Abstract: An antenna device according to an embodiment of the present invention includes a substrate, an external vehicle which is disposed on one surface of the substrate, a wave antenna which transmits and receiving data from a base station, a GPS antenna disposed on one surface of the substrate, a WiFi antenna and a wave antenna which are disposed on the other surface of the substrate, transmit data received by the wave antenna to a head unit and transmit the data received from the head unit to the wave antenna, and a system module which receives a signal from at least one of the GPS antenna and the Wi-Fi antenna and controls it. So, compunction between a vehicle and a mobile device, the vehicle and an infra, and vehicles can be performed.
Patent KR-20160112899-A (KR)
Title: Server and method for matching human resources
Inventor: KIM SANG GU
IPC: G06Q10/10
Filed: 2015-06-10
Abstract: The present invention relates to a human power information matching method performed by a human power information matching server which is communicated with a plurality of terminals through a network, and a server thereof. According to a first side of the present invention, the human power information matching method can comprise: a step of being performed by the human power information server which communicates with the user terminal through the network, receiving human power request information including the number of necessary people, a work place position, working date, and hourly wage information from a first user terminal, and storing the human power request information in connection with identification information of the first user terminal; a step of being requested a search regarding human power information stored in the human power information matching server from a second user terminal; a step of producing a human power information list based on a searching request; a step of transmitting the produced human power information list to the second user terminal; a step of receiving an input regarding a selection of at least one among the human power request information from the second user terminal; and a user information exchange step of transmitting second user information to the first user terminal and first user information to the second user terminal if the identification information which is stored in connection with the selected human power request information is the identification information of the first user terminal. By the present invention, a human power provider can easily manage necessary human power and excess human power and human power management of the human power provider can be performed smoothly since human power can be supplied in real time.
Patent KR-20160149936-A (KR)
Inventor: SON CHAE EUN
IPC: F21W107/10
Filed: 2015-06-19
Abstract: Provided is a lighting apparatus for a vehicle which is able to brightly light a license plate using one light source. To achieve this, in accordance with an embodiment of the present invention, the lighting apparatus for the vehicle comprises: a light source generating light; and a lens wherein a light source insertion groove to which the light source inserted is formed on one surface, and a protruding optic which discharges the light which the light source generated outside is formed on the other side corresponding to the light source insertion groove. The outermost circumference of the optic is formed in a first oval, and the outermost circumference of the light source insertion groove is formed in a second oval disposed in the first oval. Both ends of the minor axis of the first oval and both ends of the major axis of the second oval correspond with each other.
Patent KR-20170008488-A (KR)
Title: Novel polymer for preparing resist underlayer film, resist underlayer film composition containing the polymer and process for forming resist pattern using the composition
Inventor: JUNG MIN HO
IPC: C09D171/08
Filed: 2015-07-14
Abstract: The present invention relates to a polymer with novel structures used in processes for preparing a semiconductor or a display, an underlayer film composition for preparing the semiconductor or the display comprising the polymer, and a process to form a resist pattern for preparing the same using the composition. More specifically, the novel polymer of the present invention has an optimized etch selectivity, planarization characteristics, and superior thermal resistance at the same time. Therefore, the underlayer film composition comprising the novel polymer can be utilized as a hard mask in a lithography process for the multilayer semiconductors.
Patent KR-20170011507-A (KR)
Title: Operating method of an electronic device and electronic device supporting the same
Inventor: HYUN Hyang Soo
IPC: H02J7/02
Filed: 2015-07-23
Abstract: According to an embodiment of the present invention, an operating method of an electronic device comprises: an operation for monitoring a noise level of a noise signal received through a panel while wireless power is transmitted and/or received at a first power level through at least a conductive pattern; and an operation for generating a signal which changes the first power level in response to at least part of input through at least part of the panel. In addition, various embodiments which are figured out from the specification are possible.
Patent KR-20170011880-A (KR)
Title: 포장용 박스
Inventor: LEE JONG HYUK
IPC: B65D5/02
Filed: 2015-07-24
Abstract: 본 발명은 포장용 박스에 관한 것으로, 본 발명의 일실시예에 따르면 별도의 손잡이가 불필요하고 조립시 손잡이를 간편하게 형성시킬 수 있어 조립 과정을 단순화시킬 수 있으며, 무거운 상품도 수납이 가능하고 제품 단가를 낮출 수 있는 효과가 있다.
Patent KR-20170014859-A (KR)
Title: 저전력 양방향 통신 장치 및 방법
Inventor: RUY JAE HONG
IPC: H04L12/24
Filed: 2015-07-31
Abstract: 저전력 양방향 통신 장치 및 방법이 개시된다. 본 발명의 일실시예에 따른 저전력 양방향 통신 장치는 데이터 수집 장치와 통신을 수행하여 센서가 수집한 주위 환경에 대한 데이터를 전송하는 통신부; 상기 데이터 수집 장치에서 상기 통신부로 전송하고자 하는 데이터가 존재하는 경우 송신하는 ACK 신호를 특정 기간 동안 수신하는 ACK 신호 수신부; 및 상기 ACK 신호가 수신된 경우, 상기 통신부의 상태를 대기 상태로 변환하고, 상기 데이터 수집 장치에서 상기 통신부로 전송하는 데이터의 수신을 완료한 이후, 상기 통신부의 상태를 수면 상태로 변환하는 제어부를 포함한다.
Patent KR-20160018390-A (KR)
Inventor: MATSUURA MORITAKA
IPC: F16K31/06
Filed: 2015-08-05
Abstract: <과제> 
유체에 포함되는 이물의 슬라이딩부로의 침입을 효과적으로 억제 가능한 제어 밸브를 제공한다.  
<해결 수단> 
일 태양에 따른 제어 밸브는, 밸브 구멍(18)과 가이드 구멍(26)이 중간 압력실(24)을 통해 축선 방향으로 연통하도록 형성되고, 중간 압력실(24)에 유체를 도입하기 위한 포트(14)가 측방으로 개구하도록 형성되고, 밸브 구멍(18)을 통과한 유체를 도출하기 위한 포트(12)가 형성된 보디; 포트(12)측에서부터 밸브 구멍(18)에 접리하여 밸브부를 개폐하는 밸브체(33); 및 가이드 구멍(26)에 슬라이딩 가능하게 지지되고, 밸브 구멍(18)을 관통하여 밸브체(33)와 일체로 마련된 작동 로드(50)를 구비한다. 중간 압력실(24)에 있어서의 포트(14)와 가이드 구멍(26) 사이에 가이드 구멍(26)과 동축 형태로 형성되고, 포트(14)로부터 침입한 이물을 캐치하기 위한 저면을 구비하는 단차부(27)가 마련되고, 단차부(27)를 획정하는 내벽(31)의 지름이, 밸브 구멍(18)의 지름보다 커지게 구성되어 있다.
Patent KR-20170021517-A (KR)
Inventor: KWON DO HOON
IPC: F04D29/60
Filed: 2015-08-18
Abstract: 원심형 송풍기가 개시된다. 본 발명의 실시예에 따른 원심형 송풍기는, 임펠러; 상기 임펠러에 동력을 전달하는 모터; 상기 임펠러와 상기 모터가 지지되는 이송 테이블 구조체; 상기 이송 테이블 구조체의 하부에 배치되고, 상기 이송 테이블 구조체를 이동 가능하게 지지하는 레일; 및 상기 임펠러, 상기 모터, 상기 이송 테이블 구조체, 및 상기 레일이 내부에 배치되는 하우징을 포함하고, 상기 이송 테이블 구조체는, 상부에 상기 임펠러와 상기 모터가 지지되는 이송 테이블; 및 상기 레일에 안착되어 상기 이송 테이블이 상기 레일이 형성하는 이동 경로를 따라 이동하도록, 상기 이송 테이블의 일측에 적어도 하나 형성되는 바퀴를 포함한다.
Patent KR-20160146461-A (KR)
Title: Semiconductor structure and manufacturing method thereof
Inventor: KALNITSKY ALEXANDER
IPC: H01L23/00
Filed: 2015-08-24
Abstract: A method of fabricating a semiconductor structure includes a step of accommodating a first substrate comprising a first surface, a second surface opposite the first surface, and a plurality of conductive bumps disposed over the first surface; a step of accommodating a second substrate; a step of disposing an adhesive on the first substrate or the second substrate; a step of heating the adhesive in a first atmosphere; a step of bonding the first substrate to the second substrate by applying a force less than about 10,000 N to the first or second substrate and heating the adhesive in a second atmosphere; and a step of thinning the thickness of the first substrate from the second surface. So, device performance can be improved.
Patent KR-20170025110-A (KR)
Title: 액정 디스플레이 장치 및 이의 구동 방법
Inventor: KWON OH SANG
IPC: G09G3/34
Filed: 2015-08-27
Abstract: 본 발명은 다중 디밍 방식으로 백라이트를 제어하여 표시품질을 향상시킬 수 있는 액정 디스플레이 장치와 이의 구동 방법에 관한 것이다. 
본 발명의 실시 예에 따른 액정 디스플레이 장치는 복수의 서브픽셀이 배치된 액정 패널과, 상기 액정 패널의 하부에 배치된 복수의 LED(light emitting diode) 어레이와, 구동 회로부를 포함한다.  상기 복수의 LED 어레이는 상기 액정 패널의 센터에 대응되는 복수의 제1 LED 어레이와 상기 액정 패널의 사이드에 대응하는 복수의 제2 LED 어레이를 포함한다.  상기 구동 회로부는 타이밍 컨트롤러와, LED 드라이버 및 디밍 제어부를 포함한다.  상기 타이밍 컨트롤러는 입력된 영상 신호를 프레임 단위의 영상 데이터로 출력한다.  상기 디밍 제어부는 상기 타이밍 컨트롤러에서 입력된 영상 데이터를 분석하여 상기 복수의 제1 LED 어레이의 구동을 위한 제1 로컬 디밍 데이터 및 상기 복수의 제2 LED 어레이의 구동을 위한 제2 로컬 디밍 데이터를 생성한다.  그리고, 상기 LED 드라이버는 상기 제1 로컬 디밍 데이터에 기초하여 상기 복수의 제1 LED 어레이를 구동시키고, 상기 제2 로컬 디밍 데이터에 기초하여 상기 복수의 제2 LED 어레이를 구동시킨다.
Patent KR-20170025597-A (KR)
Title: energy saving power strip linked to mouth
Inventor: HAN HEE KWAN
IPC: G06F3/033
Filed: 2015-08-31
Abstract: The present invention relates to a mouse-interlinked energy saving power strip which comprises: a power strip including a manual socket turning on and off a power source by a manual on/off signal controlled by a mouse, and a sensor socket turning on and off the power source by the manual on/off signal controlled by the mouse, or automatically turning off the power source by an off signal interlinked with a motion sensor; and the mouse including a first button used to send the on/off signal to the manual socket, a second button used to send to the on/off signal to the sensor socket, and an motion sensing part, which is added to a conventional mouse, automatically turning off the sensor socket when a sensing signal is not generated through the motion sensor for a predetermined period in the on-state of the sensor socket, and not turning on the sensor socket in the off-state of the sensor socket even if the motion sensor senses a motion. As such, the present invention is capable of achieving high energy saving.
Patent KR-20170029973-A (KR)
Title: System on package
Inventor: KWON HEUNG KYU
IPC: H01L25/07
Filed: 2015-09-08
Abstract: Disclosed is a system on package for minimizing an internal mounting space of a semiconductor device while reducing the manufacturing cost. The system on package includes a first package and a second package stacked on the first package through metal balls. The first package includes a first printed circuit board (PCB), a system on chip which is connected to the first PCB through bumps, and a first memory device which is connected to the system on chip through micro bumps connected to vertical vias formed in the system on chip. The second package includes a second PCB, a second memory device connected to the second PCB, a third memory device connected to the second PCB, and a memory controller which is connected to the second PCB and controls the third memory device.
Patent KR-20170032114-A (KR)
Title: Voice recognition apparatus and controlling method thereof
Inventor: PARK KYUNG MI
IPC: G10L15/08
Filed: 2015-09-14
Abstract: Disclosed is a voice recognition device and a control method thereof. The voice recognition apparatus comprises: a communication interface part performing communication with an external voice recognition server; a storage part storing a plurality of keywords and domain information corresponding to the plurality of keywords; a microphone part generating a voice signal corresponding to a speech sound; and a control part recognizing the keyword included in the voice signal, determining a domain corresponding to a recognized keyword by using the domain information, and controlling a communication interface part to provide information about the determined domain and a voice signal to the external voice recognition server.
Patent KR-20170036860-A (KR)
Title: Method measuring sensory preference using a Preference-difference test based on combination of 3-point preference test and same-different discrimination test
Inventor: LEE HYE SEONG
IPC: G01N33/00
Filed: 2015-09-18
Abstract: The present invention provides a method for measuring a sensory preference for food in which a 3-point preference test and a same-different test are combined with each other, which provides a test method in which the 3-point preference test and the same-different test are combined with each other based on the result of an experiment including: a first step in which testers are divided at random into Group 1, Group 2, Group 3, and Group 4 that have the same number of testers; a second step in which Group 1 sequentially executes a 2-point preference test, the 3-point preference test following the same-different test, and the same-different test following the 3-point preference test, Group 2 sequentially executes the 2-point preference test, the same-different test following the 3-point preference test, and the 3-point preference test following the same-different test, Group 3 sequentially executes the 3-point preference test following the same-different test, the same-different test following the 3-point preference test, and the 2-point preference test, and Group 4 sequentially executes the same-different test following the 3-point preference test, the 3-point preference test following the same-different test, and the 2-point preference test; a third step in which a d estimate is drawn with a theoretical sensory/preference measurement model and based on the Thurstonian modeling/signal detection theory (SDT) so that the same-different test and the 3-point preference test of the second step are analyzed; and a fourth step in which sensory difference discrimination power and sensory preference comparison and analysis are performed by the d estimate being used.
Patent KR-20170036172-A (KR)
Inventor: KIM YEONG KOOK
IPC: B66C1/34
Filed: 2015-09-23
Abstract: The present invention relates to an instant releasing device of a weight lifting hook and, more specifically, to the instant releasing device of a weight lifting hook, which can more stably move a weight upwards when the weight is dropped downwards in a state of moving the weight upwards at the time of testing the load and performance of a descending device, and allows a tester to easily drop a weight downwards at the lower portion thereof. The instant releasing device of a weight lifting hook according to the present invention comprises: a frame; and a locking member which is provided to rotate about a hinge shaft in the frame and is connected to a weight. The locking member includes a hook, which is positioned at the lower portion of the hinge shaft and is connected to a weight, and a lever, which is formed to extend to the end of the hook and protrudes from the side of the frame.
Patent KR-20170037206-A (KR)
Inventor: LEE SEOK
IPC: A63H33/22
Filed: 2015-09-25
Abstract: 본 발명은 스마트(smart) 토이(toy) 플랫폼(platform)에 관한 발명이다. 본 발명의 일 실시예에 따른 스마트 토이 플랫폼은 몸체, 상기 몸체의 일부분에 결합하여 특정한 기능을 수행하는 기능 유닛, 상기 기능 유닛의 동작을 제어하는 가능한 응용 유닛, 상기 응용 유닛에 응용 지원 기능을 제공하는 베이스 유닛을 포함하되, 상기 응용 유닛과 상기 기능 유닛은 상기 몸체에 탈부착이 가능할 수 있다. 본 발명의 일 실시예에 따른 스마트 토이 플랫폼은, 상기 기능 유닛과 응용 유닛을 교체함으로써 새로운 기능을 가지는 스마트 토이를 제공할 수 있다.
Patent KR-20170043928-A (KR)
Title: Battery module and fabricating method thereof
Inventor: AN SUN MO
IPC: H01M2/26
Filed: 2015-10-14
Abstract: Provided are a battery module and a fabricating method thereof, having a strong electrical connection part between a secondary battery and a voltage sensing module against vibration or shock, and simplifying the assembling process of electrically connecting the secondary battery and the voltage sensing module. The battery module according to the present invention includes: a plurality of secondary batteries having electrode leads; and a voltage sensing module including a PCB electrically connected to the electrode lead to sense a voltage of the secondary battery. A conductive rubber is used to electrically connect the electrode lead and the PCB.
Patent KR-20170043974-A (KR)
Inventor: LEE WOO CHEOL
IPC: A61B5/00
Filed: 2015-10-14
Abstract: 본 발명은 창상 진단 및 치료용 복합 전극패드에 관한 것으로서, 기판 하면에 전도성 스폰지 링 전극 및 비전도성 스폰지 링이 동심원상으로 교대로 배치되고, 최외곽 링에 복수의 EIS(electro interstitinal scan) 생체 진단 및 전기자극용 전극이 배치된 부착 패치가 구비되며, 공기 주입구 및 공기 배출구가 형성된 중앙의 원형 스폰지 및 상기 전극들과 연결된 복수의 전선 및 상기 공기 주입구 및 공기 배출구로부터 연결된 공기 주입관 및 공기 배출관이 지나가는 유연재질의 접속케이블 및 상기 접속케이블 말단에 형성된 상기 전극들 및 상기 공기 주입관 및 공기 배출관을 창상 진단 및 치료 장치 본체에 연결시키는 접속 커넥터를 포함하는, 창상 진단 및 치료용 복합 전극패드 및 이를 포함하는 창상 진단 및 치료장치를 제공한다.
Patent KR-20160062681-A (KR)
Inventor: HWANG GUNN
IPC: G01V1/18
Filed: 2015-10-21
Abstract: The present invention relates to a device that detects a leak of a liquid leaked from a sinkhole, water pipe or oil pipeline under the ground. In the detection device of the present invention, a plurality of reception devices disposed on the surface of the earth simultaneously receive an ultrasonic signal transmitted from a transmission device under the ground and a radio frequency (RF) signal synchronized with the ultrasonic signal. Also, by measuring an arrival time of the ultrasonic signal by using the wireless signal received by each reception device as a triggering signal, a leak range of a liquid leaked from a sinkhole, water pipe or oil pipeline on a signal path between the transmission device and the reception device is detected.