Position measuring apparatus and optical deflection angle measuring apparatus for underground excavators
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01B-011/14
출원번호
US-0331865
(1999-10-13)
우선권정보
JP-0297295 (1997-10-29)
국제출원번호
PCT/JP98/04689
(1998-10-16)
국제공개번호
WO99/22201
(1999-06-05)
발명자
/ 주소
Yoshiaki Shimomura JP
Naoki Miyanagi JP
Takashi Moro JP
출원인 / 주소
Hitachi Construction Machinery Co. Ltd. JP
대리인 / 주소
Crowell & Moring LLP
인용정보
피인용 횟수 :
11인용 특허 :
3
초록▼
An optical deflection angle measuring apparatus which, upon optically measuring a deflection angle, does not require an operation for directing a light onto a position detecting element and makes it possible to obtain measurement results without being affected by external force such as vibrations. A
An optical deflection angle measuring apparatus which, upon optically measuring a deflection angle, does not require an operation for directing a light onto a position detecting element and makes it possible to obtain measurement results without being affected by external force such as vibrations. A detector 410 is constructed with a common lens 411 for converging diffuse lights from light sources 41,42. Position detecting elements 412-2,412-1 receive the thus-converged lights from the light sources 41,42 and detect received positions of the converged lights. Reflecting prisms 413-1,413-2 allow the diffuse lights from the light sources 41,42 to be transmitted and guided so that the diffuse lights from the light sources 42,41, are converged, by the lens 411, onto the position detecting elements 412-1,412-2. The respective position detecting elements are arranged so as not to interfere with the convergence of the lights by the lens 411. The deflection angle .PHI. can then be measured by computation.
대표청구항▼
1. A position measuring apparatus for an underground excavator, said apparatus being useful in measuring a position of excavation by said underground excavator advancing in the ground while excavating a tunnel and being adapted to measure a position of a measured point, which is arranged at a front
1. A position measuring apparatus for an underground excavator, said apparatus being useful in measuring a position of excavation by said underground excavator advancing in the ground while excavating a tunnel and being adapted to measure a position of a measured point, which is arranged at a front in an excavating direction and serves as an indication for said position of excavation, on a basis of its positional relationship with a measuring cardinal point arranged at a rear in said excavating direction and serving as a cardinal point for said measurement, comprising:a cardinal-point measuring unit for setting said measuring cardinal point, said cardinal-point measuring unit having a light source capable of emitting a light forward, converging means capable of converging a diffuse light from a forward light source, and light-receiving means arranged such that said light-receiving means can receive a light converged by said converging means and can detect a direction of said forward light source on a basis of a position of said light so received, said position being located in a two-dimensional plane; a measured-point measuring unit for setting said measured point, said measured-point measuring unit being arranged on said underground excavator and having a light source capable of emitting a diffuse light rearward, converging means capable of converging a diffuse light from a rear light source, and light-receiving means arranged such that said light-receiving means can receive a light converged by said converging means and can detect a direction of said rear light source on a basis of a position of said light so received, said position being located in a two-dimensional plane; at least one intermediate measuring unit arranged between said cardinal-point measuring unit and said measured-point measuring unit in said tunnel and having a light source capable of emitting diffuse lights forward and rearward, converging means capable of converging diffuse lights from forward and rearward light sources, respectively, and light-receiving means arranged such that said light-receiving means can receive respective lights converged by said converging means and can detect directions of said forward and rearward light sources on a basis of said positions of said respective lights so received, said positions being located in their corresponding two-dimensional plane; and computing means for computing and measuring a position of said measured point relative to said measuring cardinal point on a basis of data, which are concerned with said two-dimensional directions of said respective light sources as determined based on detection results at said respective measuring units consisting of said cardinal-point measuring unit, said measured-point measuring unit and said intermediate measuring unit, and data on distances between said individual measuring units and their adjacent measuring units.
연구과제 타임라인
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이 특허에 인용된 특허 (3)
Thiemann Heinz (Bardowick DEX) Schwarz Bernd (Hamburg DEX) Langhans Dieter (Appen-Unterglinde DEX), Arrangement for determining the position of a hollow section system which is pressed forward.
Nussbaumer Manfred (Leonberg DEX) Beitinger Eberhard (Stuttgart DEX) Mhlenbrink Wolfgang (Esslingen DEX), Method for determining the position of a pressed-ahead hollow-section line, and apparatus for implementing the method.
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