JPS59176685A - Detection system for position of moving body - Google Patents

Abstract

PURPOSE:To eliminate the influence of an induction noise by providing a moving body with a light source and arranging one terminal of an optical transmission line fitted with a lens which converges the light of said light source along a movement path for said moving body on a ground side. CONSTITUTION:The moving body MB is provided with a signal generation part b1 and the light source a1 driven by it. Then, one-side terminals of numbers of optical transmission paths OPT fitted with lenses LZ for converging the light of the light source a1 to the place where the position of the moving body MB is detected along the movement path for the moving body MB is arranged on the ground side, and those optical transmission lines OPT are connected to a photodetection processing part PRC on the other side. The photodetection processing part PRC discriminates which optical transmission line OPT transmits the light of the light source a1 of the moving body MB to detect the absolute position of said moving body MB. This system eliminates a noise generated on an optical transmission line, so the influence of an induction noise is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting the position of a moving object, and particularly to a method for detecting the position of a moving object using an optical transmission line.

Various methods have been proposed to detect the position of a moving object such as a vehicle, but one method is to detect it as an electrical signal using electromagnetic or electrostatic coupling between the moving object and ground equipment. This is common, and in that case, a signal line is laid along the travel path of the moving body, so there is a risk that noise components will be induced by electric v1 induction and electrostatic induction, resulting in false detection.

The present invention aims to improve the above-mentioned conventional drawbacks and provide a method for detecting the position of a moving object that is not affected by induced noise. Examples will be described in detail below.

For point detection in the position detection of a moving object, for example, as shown in FIG. The signal from the signal generating section of the mobile body MB is emitted from the signal emitting section a to the detecting section D.
ET detects the signal, and the processing unit PRC identifies the detection signal from the detection unit DET and sends it to the moving body M.
This is to detect the moving point of B.

The present invention optically performs the detection between moving bodies as described above, and transmits the detection signal as light to a processing section through an optical transmission line. FIG. 2 is an explanatory diagram of an embodiment thereof.

A signal generating unit b1 and a light source aI driven by the signal generating unit b1 are provided between the moving bodies, and on the ground side, a light source a is provided along the movement path between the moving bodies and at a location where the position between the moving bodies is to be detected.
One end of a plurality of optical transmission lines OPT equipped with a lens LZ for condensing the light of l is arranged, and the plurality of optical transmission lines OP
The other end of T is connected to the light reception processing section r'Rc. The light reception processing unit PRC detects the absolute position of the moving object by identifying through which of the plurality of optical transmission paths OPT the light from the light source al of the mobile @#MB is transmitted. In this embodiment, the lens LZ corresponds to the detection section DET in FIG.

As explained above, the present invention detects the position of the moving object by optically detecting the moving object, transmitting the detected optical signal through an optical transmission path, and identifying it in the light reception processing section. Until the processing in the light reception processing section, the optical signal is in the state of an optical signal, and the optical transmission line made of optical fiber that transmits the optical signal is an electrical insulator, so the optical transmission line is processed by electromagnetic induction or electrostatic induction. Therefore, there is an advantage that position detection can be performed accurately even for a moving body whose speed is controlled using chopper control using thyrisk. In addition, the configuration is such that a light source is provided on a moving object, and a plurality of lenses are attached on the ground side to focus the light from the light source on a location where the position of the moving object is to be detected along the moving path of the moving object. one end of the optical transmission path is disposed, and a light receiving processing unit to which the other end of the plurality of optical transmission paths is connected identifies which of the plurality of optical transmission paths the light from the light source of the moving body is transmitted from. This has the advantage that it can be simple, consisting of a light reception processing section that detects the position of the moving body.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of point detection by the mobile object position detection device, Figure 2
The figure is a detailed explanatory diagram of the present invention. MB is a moving body, al is a light source, DET is a detection unit, OPT is an optical transmission line, LZ is a lens, PR
C is a light reception processing section. Patent applicant: Sumitomo Electric Industries Co., Ltd. Patent attorney Kugobe Tamakamo

Claims (1)

[Claims] One end of a plurality of optical transmission lines in which a light source is provided on a moving object, and a lens is attached on the ground side for transmitting light from the light source to a location along the moving path of the moving object and where the position of the moving object is to be detected. A light receiving processing section connected to the other end of the plurality of optical transmission lines identifies which of the plurality of optical transmission lines the light from the light source of the moving body is transmitted. A mobile object position detection method characterized by detecting the position.