baber/WOPTO huggingface dataset:
Patent KR-20000038486-A (KR)
Title: Apparatus for coupling dust-collecting filter of air conditioner
Inventor: JANG YEONG JUN
IPC: F24F13/00
Filed: 1998-12-07
Abstract: PURPOSE: An apparatus for coupling dust-collecting filter is provided to easily and securely attach the dust-collecting filter to a front panel of a main body of an air conditioner. CONSTITUTION: An air conditioner includes a main body(1), a front panel(2) attached to a front surface of the main body(1), a heat exchanger(4) coupled in the main body(1) and having an end plate(20) for heat exchange of sucked air, and a dust-collecting filter(11) installed on back surface of the front panel(2) for further filtering the air which passes through an air filter(19) and for collecting dust and foreign materials contained in the air. An apparatus for coupling a dust-collecting filter includes a pair of filter cases(101) with one side fixed to an inner surface of the front panel(2) and the other side fixed to the heat exchanger(4). The dust-collecting filter(11) is fitted into and coupled to the filter cases(101).
Patent KR-20000039775-A (KR)
Title: Display device for three dimensional pictures
Inventor: HONG HYEONG GI
IPC: H04N13/00
Filed: 1998-12-16
Abstract: PURPOSE: A display device for three dimensional pictures is provided to enable user to watch three dimensional pictures without using spectacles for three dimensional picture. CONSTITUTION: A display device for three dimensional pictures includes a video signal input, a video signal converter(20), a display(14), and a color barrier(22). The video signal input inputs video signals. The video signal converter(20) converts the input video signal into a predetermined format. The display(14) displays an image corresponding to the converted video signal. The color barrier(22) is arranged as to face the foreface of the display(14) and expresses the color of the image displayed by the display(14) of the display device for three dimensional pictures.
Patent KR-20000039872-A (KR)
Title: Method and apparatus for testing standby path in communication between processors.
Inventor: LEE CHANG HWAN
IPC: G06F11/22
Filed: 1998-12-16
Abstract: PURPOSE: A method and apparatus for testing a standby path in communication between processors is provided to assure a smooth communication by duplex a man machine system and a main processor, since a standby path can be tested previously in a system wherein the communication path used for communication with processors. CONSTITUTION: A apparatus for testing a standby path in communication between processors includes the following units. A looping control unit outputs a control signal when a frequency applied from a processor unit is changed. A looping unit returns back data applied from the processor unit to the processor unit side by looping the same.
Patent KR-20000040218-A (KR)
Title: Multi chip package
Inventor: LEE KWAN JAE
IPC: H01L23/00
Filed: 1998-12-17
Abstract: PURPOSE: A multi chip package is provided to decrease a package thickness, a wire loop length, and a wire loop height. CONSTITUTION: A multi chip package(10) includes a first chip(11) having electrode pads(12) centrally formed thereon and a second chip(13) having electrode pads(14) peripherally formed thereon. While the first chip(11) is directly attached to leads(15) by a polyimide tape(20), the second chip(13) is attached back to back with the first chip(11). The electrode pads(12,14) are electrically connected with the leads(15) through wires(16,17). A package body(18) is formed from a resin encapsulant such as epoxy molding compound, and outer portions of the leads(15) are protruded from the package body(18). Since the package(10) does not need a conventional die pad for mounting the chip, a thickness of the package(10) can be reduced as much as the die pad occupies, and limitations on wire loop can be relaxed.
Patent KR-20000041889-A (KR)
Title: Method for managing state information in duplicating board
Inventor: LEE JIN SEOK
IPC: G06F7/00
Filed: 1998-12-24
Abstract: PURPOSE: A method for managing state information in a duplicating board, is provided to monitor with each other by using a dynamic programmable random access memory(DPRAM) in a corresponding duplexed unit board. CONSTITUTION: A method for managing state information in a duplicating board, comprises the steps as follows. State information is stored in an information field of a first information storage circuit by periodically combining in a standby state board, simultaneously, a corresponding address is recorded in an address field of a corresponding first information storage circuit. An interrupt signal in the standby state board and position information of the address field are transmitted to an activation state board. The state information is read from the information field of the first information storage circuit corresponding to the address field of the position information in the activation state board. A reading completion signal is transmitted to the standby state board by confirming that all the state information is read in the activation state board. The read state information is stored in a total information field of a second information storage circuit by combining state information in the activation state board, simultaneously, a corresponding address is stored in a total address field of a corresponding second information storage circuit.
Patent KR-19990063394-A (KR)
Title: 폴리프로필렌 수지 조성물
IPC: C08L53/00
Filed: 1998-12-24
Abstract: 본 발명은 관련 폴리프로필렌 물질과 비교하여 물성의 균형을 크게 개선시킨, 자동차의 내부 및 외부 부품으로 모두 사용할 수 있고, 탁월한 박벽 성형성을 가지며 유동 마크의 생성을 급격하게 감소시킬 수 있는 폴리프로필렌 수지 조성물을 제공한다.  특히, 본 발명은 명시된 양의 (A) 명시된 에틸렌-프로필렌 블럭 공중합체, (B) 명시된 열가소성 탄성중합체 및 (C) 활석을 포함하며, 명기된 수치의, ASTM에 의해 측정된 물성을 가지며 사출성형법으로 제조된 ASTM No. 1 덤벨의 중앙부의 광각 X-선 회절법에 의해 차동 피크 강도의 비율로부터 계산한 b-축 배향도가 720 이상인 폴리프로필렌 수지 조성물을 제공한다.
Patent KR-20000043112-A (KR)
Title: Door lock apparatus for damping side collision impact of vehicle
Inventor: PARK JONG PHIL
IPC: E05B77/10
Filed: 1998-12-28
Abstract: PURPOSE: A door lock apparatus for damping a side collision impact of a vehicle is provided to prevent opening of a door by mistake and strength of a frame by additionally mounting a second door lock device in connection with a first door lock device. CONSTITUTION: A door lock apparatus for damping a side collision impact of a vehicle includes a door lock switch for locking a door by switching a first door lock device, the first door lock device to be provided with power supply when operating the door lock switch for coupling a door with a body, and a second door lock device(21) provided with power supply in response to the operation of the first door lock device by the operation of the door lock switch for coupling the door with other part of the body, wherein the second door lock device is positioned to a body frame(20) and inserted into a slide main body, a side out panel and a PVC cover are covered outside the second door lock device, and the door part positioned with an inserting groove of a push rod(25) is mounted with a PVC cover, a door inner panel and a reinforcing element.
Patent KR-20000043584-A (KR)
Title: Method of multi-layering in semiconductor device
Inventor: BAEK IN HYEOK
IPC: H01L21/768
Filed: 1998-12-29
Abstract: PURPOSE: A method of multi-layering in a semiconductor device is provided to improve reliability of layer, by patterning a multi-layer so that a surface of a layer in a lower region of the multi-layer can be increased, to increase a contact surface with a contact electrode. CONSTITUTION: A method of multi-layering in a semiconductor device comprises the steps of: forming a first oxidation layer on a silicon substrate having a predetermined circuit; forming a first layer on the first oxidation layer by stacking conductive material; forming a second oxidation layer on the first layer; patterning the second oxidation layer; performing a first half etching regarding the first layer exposed by the patterned second oxidation layer, by using the patterned second oxidation layer as a mask; forming a third oxidation layer on the half-etched first layer and the patterned second oxidation layer; blanket-etching the third oxidation layer so that the third oxidation layer can become a sidewall of a protruded portion of the first layer not half-etched; performing a second etching regarding to eliminate the exposed first layer by using the patterned second oxidation layer and the third oxidation as a mask; forming an interlayer dielectric on the first oxidation layer exposed by elimination of the first layer, the patterned second oxidation layer and the patterned third oxidation layer; forming a contact hole penetrating the interlayer dielectric to expose the patterned first layer; and forming a second layer by layering conductive material on the first layer exposed by the contact hole and the interlayer dielectric.
Patent KR-20000044879-A (KR)
Title: Method for forming isolation film of semiconductor device
Inventor: YEU IN SUCK
IPC: H01L21/76
Filed: 1998-12-30
Abstract: PURPOSE: A method for forming an isolation film of a semiconductor device is provided which suppresses the thinning phenomenon of an isolation film and improves the characteristics of the isolation film. CONSTITUTION: A method for forming an isolation(16) suppresses the thinning phenomenon by controlling the growth rate of the isolation film on a region where the width of the isolation film is narrow to be faster than on a region where the width of the isolation film is wide. The method also improves the GOI(gate oxide integrity) characteristics of an active region and the junction leakage current characteristics, without an additional process to suppress bird's beak generated on the active region because the isolation film can be formed sufficiently thick. Therefore, the method improves the yield and the refresh characteristics of the device.
Patent KR-19990066913-A (KR)
Title: 음료수 용기용 뚜껑
IPC: B65D43/02
Filed: 1998-12-30
Abstract: 음료수 용기용 뚜껑은 사용자의 필요시 용기의 내용물에 간단히 접근하는 한편 음료수 용기에 뚜껑을 신뢰성 있게 부착하도록 허용하는 단일의 형상으로 구비된다.  특히, 본 발명의 뚜껑은 주둥이와, 음료수 용기에 부착된 캡과, 그리고 개방 및 폐쇄 위치 사이에서 회전 가능한 덮개를 포함한다.  특히, 덮개는 용기 내의 내용물을 밀봉할 뿐만 아니라, 외부의 오염으로부터 주둥이를 격리시킨다.  로커 부재는 덮개를 캡에 연결시켜서 캡에 대해 덮개가 피봇되도록 한다.
Patent KR-19990044547-A (KR)
Title: 연소식 유해물질 제거장치
IPC: F23G7/06
Filed: 1997-08-11
Abstract: 유해성분을 포함하는 피처리 가스를 연소 버너(2)를 통해 연소챔버(1) 내에 분출시켜 연소 혹은 열분해시킴으로써 유해물질 제거처리를 하는 연소식 유해물질 제거장치이다. 상기 연소 챔버(2)는, 바깥둘레벽(11) 및 다공성재료로 이루어지는 안둘레벽(12)과의 2중벽 구조로 형성되어 있다. 상기 바깥둘레벽(11)과 상기 안둘레벽(12)과의 사이에 압력기체를 도입하는 기체도입 노즐(4)이 설치되어 있다.
Patent KR-19990067098-A (KR)
Title: 성장 호르몬 분비 촉진제의 다형체
IPC: C07K5/062
Filed: 1996-10-23
Abstract: 본 발명은 식용 동물에 있어서는 이들의 성장을 촉진시켜 식용 육류제품의 제조를 더욱 효율적으로 만들고, 사람에 있어서는 성장 호르몬의 분비가 결핍된 것을 특징으로 하는 생리학적 또는 의학적 질환을 치료하고 성장 호르몬의 동화작용 효과에 의해 개선되는 의학적 질환을 치료하는 데 유용한 성장 호르몬 분비 촉진제인 N-[1(R)-[(1,2-디하이드로-1-메탄설포닐스피로[3H-인돌-3,4'-피페리딘]-1'-일)카보닐]-2-(페닐메틸옥시)에틸]-2-아미노-2-메틸프로판아미드 메탄설포네이트 화합물의 다형체에 관한 것이다.  순간적인 다형체는 기타 공지된 형태의 N-[1(R)-[(1,2-디하이드로-1-메탄설포닐스피로[3H-인돌-3,4'-피페리딘]-1'-일)카보닐]-2-(페닐메틸옥시)에틸]-2-아미노-2-메틸프로판아미드 메탄설포네이트에 비해 열역학적 안정성 및 약제학적 제형에 포함시키기 위한 적합성의 측면에서 유리하다.  또한 본 발명은 이러한 다형체의 제조방법, 이들 다형체를 활성 성분으로서 포함하는 약제학적 조성물 및 특정 질환을 치료함에 있어서 이 화합물의 다형체 및 이들 조성물의 용도에 관한 것이다.
Patent KR-19990071660-A (KR)
Title: 충전기
IPC: H02J7/00
Filed: 1997-09-24
Abstract: 충전기는 충전가능한 전지를 갖는 전원장치(2)를 출력단자(OUT)에 접속했을 때에 고전압을 전원장치(2)에 부여할 수가 있도록 전원장치(2)를 접속하지 않은 상태일 때에도 고전압을 출력시킬 수 있게 되어 있다. 
     그리고, 충전기는 주기적으로 변화하는 주기신호를 출력단자(OUT)에 부여하는 주기신호발생수단(30)과 출력단자(OUT)에 있어서의 주기신호의 유무를 검출하므로서 전원장치(2)가 접속상태인지 아닌지를 검출하는 검출수단을 설치하고 있다. 
     이것에 의해 충전기는 기계스위치를 설치하지 않아도 전원장치(2)의 접속상태를 검출할 수가 있다.
Patent KR-19990072111-A (KR)
Title: Spla2 억제제인 나프틸 글리옥스아미드
IPC: C07C235/78
Filed: 1996-12-09
Abstract: 신규한 종류의 나프틸 글리옥스아미드 화합물을 신규한 나프틸 글리옥스아미드 화합물의 제조 방법 및 그러한 화합물의 패혈증 쇼크와 같은 질환 치료를 위한 sPLA 2 매개 지방산 유리의 억제 용도와 함께 개시한다.
Patent KR-19990081848-A (KR)
Title: 이용자의 특성에 따른 화상을 제공하는 통신 시스템 및 해당통신 시스템에 사용하는 단말장치및 정보제공장치
IPC: G06Q30/02
Filed: 1997-02-26
Abstract: 이용자가 월드 와이드 웹상의 여러 가지 사이트에 액세스한 경우에도 메시지를 계속하여 제공할 수 있는 정보제공장치 및 검색장치를 제공하기 위하여 월드 와이드 웹의 제 1 화상을 단말에 전송하는 정보제공장치에 있어서, 단말과의 사이의 통신회선상에 제 1 논리회선을 접속하여 제 1 화상을 월드 와이드 웹으로부터 단말에 송신하고, 단말의 이용자를 식별하는 식별정보를 단말로부터 수신하여 이용자의 특성 및 메시지의 송신조건을 저장하는 검색장치에 제 2 통신회선을 이용하여 접속하여 식별정보를 송신하고, 검색장치가 검색한 메시지 지정정보에 의거하여 메시지 데이터 베이스에서 메시지를 읽어 내어 통신회선상에 제 2 논리회선을 접속하여 읽어 낸 메시지를 단말에 송신한다.
Patent KR-19990082163-A (KR)
Title: 프로그램 가능 메모리장치를 가진 제어장치를 작동하는 방법
IPC: G11C16/10
Filed: 1997-02-27
Abstract: 제어장치의 작동을 위해 데이터 및 프로그램을 기억시키기 위한 프로그램 가능 메모리장치(22)를 구비한 제어장치(20)를 작동하는 방법이 기재되어 있다. 기재된 방법은 프로그램 가능 메모리장치의 프로그램화의 진행과 더불어 프로그램화 과정을 문서화하는 데이터가 기억되게 하는 것이 특징이다.
Patent KR-19990082650-A (KR)
IPC: B29C67/24
Filed: 1997-02-05
Abstract: Shaped articles made from molded ultra high molecular weight polyethylene (UHMWPE) with an average molecular weight of between about 1 million and about 10 million and exhibiting a low modulus of elasticity throughout the shaped article or in selected regions of the shaped article are disclosed. These articles are produced by filling a mold with powdered UHMWPE, covering the mold with a piston, raising the temperature of the mold and its contents to between about 140 DEG  and about 225 DEG  C. while simultaneously applying a pressure of between about 2.5 and about 15 MPa to the mold and its contents, maintaining the pressure and temperature for between about 5 and about 25 minutes, with the time selected dependent upon the thickness of the molded part, then dropping the temperature of the molded part, either completely or in part at a rate between about 4 DEG  and about 175 DEG  C./minute either while maintaining the mold at the molding pressure, at pressure less than the molding pressure or under no external applied pressure. The shaped articles so produced exhibit a combination of properties including an elastic modules between about 500 MPA and about 800 MPA, a yield strength equal to or greater than about 20 Mpa, an elongation to rupture of greater than about 300%, crystallinity and density less than or equal to about that of the native powdered UHMWPE used to form the part and a melting point less than or equal to about that of native UHMWPE powder that has experienced melting and cooling at ambient pressure. The shaped articles are useful as the bearing surface of total knee joints, prosthetic hip joint cups and as other prosthetic shapes for replacement of other joints of the human body.
Patent KR-20000004960-A (KR)
Title: Device and method for inserting marker into book
Inventor: JAREMBO PETER J
IPC: G08B13/24
Filed: 1996-07-29
Abstract: PURPOSE: A new and improved device for inserting a marker is provided to insert a sensing marker between both pages of a book or a file of the book. CONSTITUTION: The device for taking off one marker(1004) is composed of:a device for manipulating the rolls(1000) of the markers; a device for accepting the member of a marker applicator; a device for automatically taking off the marker from the rolls; a device for attaching the taken off marker to the applicator. This device is a reliable one to quickly and simply divide an individual marker from a series of makers and to insert the marker into the book.
Patent KR-20000016465-A (KR)
Title: Peptide derivatives
Inventor: COTTON RONALD
IPC: C07K7/02
Filed: 1997-06-03
Abstract: PURPOSE: A method for using a peptide derivative is provided to be effective for treating MHC class II dependent T-cell mediated autoimmune or inflammatory diseases such as rheumatoid arthritis. CONSTITUTION: The invention concerns pharmaceutically useful peptide derivatives of the formula (I), P-AA1-AA2-AA3-AA4-AA5-AA6-AA7-AA8-Q, in which P, AA1, AA2, AA3, AA4, AA5, AA6, AA7, AA8, and Q have the various meanings defined herein and their pharmaceutically acceptable salts, and pharmaceutical compositions containing them. The novel peptide derivatives are of value in treating MHC class II dependent T-cell mediated autoimmune or inflammatory diseases, such as rheumatoid arthritis. The invention further concerns processes for the manufacture of the novel peptide derivatives and the use of the compounds in medical treatment.
Patent KR-20000016652-A (KR)
Title: Television schedule system and method of operation for multiple program occurrences
Inventor: SCHEIN STEVEN M
IPC: H04N5/445
Filed: 1997-06-13
Abstract: PURPOSE: An improved television guide system is provided. CONSTITUTION: Television guide information is provided that includes multiple occurrences of a single show. Schedule guide information are inputted to the guide system. A user input information is entered to identify a certain show from the schedule guide information. The guide system allows the user to identify a show and, thereafter, identify when the identified show will be played again. Accordingly, the user may more easily select shows for viewing or recordation.
Patent KR-20000022507-A (KR)
Title: Electromagnetically releasable friction safety brake
Inventor: DROPMANN CHRISTOPH
IPC: F16D65/14
Filed: 1997-06-27
Abstract: PURPOSE: An electromagnetically releasable friction safety brake with two brake discs which are arranged on a common central drive shaft to be axially displaceable but non-rotatable with respect to the shaft is provided. CONSTITUTION: The electromagnet consisting of the magnetic coil(6) and the spool carrier (5) that surround the central shaft or hub are axially displaceable but non-rotatable in the brake, that a single armature disc(3) which is also axially displaceable but non rotatable in the brake is arranged between the two brake discs(2,11) and the magnetic coil/spool carrier, and that the springs(7) are tensioned axially between the magnetic coil/spool carrier and the single armature disc(3). In an alternative arrangement, the drive shaft takes the front of a boss surrounding the brake assembly, brake discs have radially outwardly facing splines that engage radially inwardly facing splines within the boss. In a linear version of the brake, the brake discs are replaced by the cables or webs of external equipment.
Patent KR-20000050885-A (KR)
Inventor: KIM JANG SU
IPC: G02F1/133
Filed: 1999-01-15
Abstract: PURPOSE: A thin film transistor substrate for a liquid crystal display device and a method for manufacturing the same are provided to lower the resistance of wirings. CONSTITUTION: A thin film transistor substrate for a liquid crystal display device includes an insulation substrate(10), a gate wiring(20), a gate insulation layer(30), a semiconductor layer(40), a pixel electrode, an auxiliary gate pad(24), a data pad(63), a data line(70), a source electrode(73), a drain electrode(74), and a protection layer. The gate wiring(20) is formed on the insulation substrate. The gate insulation layer(30) covers the gate wiring except for the gate pad. The semiconductor layer(40) is formed on the gate insulation layer. The pixel electrode is formed on the semiconductor layer. The auxiliary gate pad(24) covers the gate pad and is formed with a material same to that of the pixel electrode. The data pad(63) is formed with a material same to that of the pixel electrode. The data line(70) crosses the gate wiring. The source electrode(73) is coupled with the data line. The drain electrode(74) faces the source electrode. The protection layer covers the data line, source electrode and the drain electrode.
Patent KR-20000051840-A (KR)
Inventor: KIM SUNG KYUM
IPC: C07D501/22
Filed: 1999-01-27
Abstract: PURPOSE: A method for preparing intermediates for use in preparing cefixime by preparing 3-vinyl cephalosphorin-based derivatives with reactive organic acid is provided which can produce the title compound in a high purity and a high yield in a simple manner. CONSTITUTION: An intermediate represented by the formula 1 having a 2-£aminothiazolyl|-2£tertiary-buthoxy carbonyl|methoxyiminoacetamido side chain at the 7-position of a cephalosphorin nucleus is prepared by acilating 3-vinyl cephalosphorin derivatives represented by the formula 3 and reactive thiophosphate of thiazole acetic acid represented by the formula 2 in the presence of a solvent and a base. In formula, h, para-methoxybenzyl or diphenylmethyl.
Patent KR-20000054880-A (KR)
Title: Release film
Inventor: WON JONG SEOP
IPC: B32B27/40
Filed: 1999-02-01
Abstract: PURPOSE: A release film is provided to improve adhesive power and durability of adhesive power and is provided for release film including a primer layer which is applied to use generally indifferently to components of base film and release layer. CONSTITUTION: A release film includes a base film, a primer layer and a release layer which are formed in order on base film. The primer layer includes water soluble polyurethane, silane coupling agent(X-Y-Si-R1R2R3), packing material mixed at a weight ratio 25-75:25-75:1-30. The film can be used at label, tape, stamping foil, duplicating paper for make up.
Patent KR-20000055211-A (KR)
Inventor: JEON SI MOON
IPC: D06F35/00
Filed: 1999-02-04
Abstract: PURPOSE: A laundry machine having a slant washer tub is provided to achieve enhanced efficiency of washing action while arranging the washer tub to be inclined during washing and rinsing operations, and prevent vibration and noise while arranging the washer tub to be set upright during a drying operation. CONSTITUTION: A laundry machine comprises a pipe(80) installed in a lower portion of an outer case(51) so as to support a lower portion and side surfaces of a washer tub(60), the pipe(80) supporting the washer tub(60) by a hydraulic pressure, a hydraulic pump(90) connected to the pipe(80) in such a manner as to allow the washer tub(60) to be inclined at a predetermined angle and which controls pressure of the fluid contained within the pipe(80), and a resilient contact member arranged in a portion where the tub(60) contacts the pipe(80). The resilient contact member further comprises a roller(75) contacting the tub(60), a rod(71) having an end thereof connected to the roller(75), a rod base(72) connected to the other end of the rod(71), a piston(74) contacting the fluid contained within the pipe(80), and a spring(73) arranged between the piston(74) and the rod base(72).
Patent KR-20000055912-A (KR)
Inventor: HAN SEONG YEONG
IPC: H01L23/48
Filed: 1999-02-11
Abstract: PURPOSE: A method for manufacturing a semiconductor package is provided to simplify a trajectory of a bonding apparatus by making a bar-shape beam lead. CONSTITUTION: A method for manufacturing a semiconductor package comprises the steps of: forming a printed circuit board having a plurality of long holes; aligning bar-shape beam lead on the long hole, and adhering a polyimide tape to an entire surface of the printed circuit board; bending to form an elastic region having a predetermined shape on the body of the beam lead; adhering a bonding pad to a semiconductor chip, and applying a filling material to a region on which the bonding pad is nor formed, to adhere the printed circuit board to the filling material; and cutting the beam lead and bonding the cut beam lead to the bonding pad.
Patent KR-20000056486-A (KR)
Inventor: LEE GEUN HO
IPC: G01S15/42
Filed: 1999-02-22
Abstract: PURPOSE: A device for sensing object and its method is provided to sense even an object which is at no great distance or which is at a great distance. CONSTITUTION: A device for sensing object is composed of a modulation amplifier(3), an ultrasonic sensor(5), a receive amplifier(7), an integrator(8), a rectifier(9) and a controller(10). The modulation amplifier(3) amplifies the signal outputted from the controller(10). The ultrasonic sensor(5) has a transmitter and a receiver. The transmitter generates an ultrasonic and the receiver receives a reflection wave which is reflected by object and reverberation by aftershock of the transmitter. The receive amplifier(7) amplifies the inputted reflection wave and reverberation from the receiver. The integrator(8) integrates the received reflection wave and reverberation from the receiver, based on the prescribed threshold voltage. The rectifier(9) rectifies the received reflection wave from the receiver. The controller(10) compares the integrated reflection wave in the integrator(8) with the rectified reflection wave in the rectifier(9) and then distinguishes the position of object.