Method and equipment for measuring distance between two stations connected through communication channel

通信チャネルで接続された2つのステーション間の距離測定装置及び方法

Abstract

(57)【要約】 【課題】 通信チャネルを介して接続された2つのステ ーション間の距離測定装置および方法を提供する。 【解決手段】 2つのステーション間の距離測定方法に おいて、距離を求める衛星(A,1、B,1)が領域要 求(3)を内部衛星通信チャネルを介して他の衛星 (A,1またはB,1)に送信し、その衛星は応答 (4)により領域要求(3)に答える。このとき、対応 する周期時間の測定から距離が求められる。また、領域 要求(3)および対応する応答(4)は多重通信チャネ ルにおいて送信される。
PROBLEM TO BE SOLVED: To realize a highly accurate measurement of distance by combining a synchronization bit method with a subchannel transmission involving request of region and transmission of response. SOLUTION: A response to a distance measurement request is returned back to a request side station through a subchannel. An encoded response from an opposite station is detected by a subchannel processing unit at the request side station and a signal is delivered on a signal line 23 to a counter 22 at the request side station. Consequently, counting of effective channel bit is interrupted. The count can be utilized for determining the distance on a bus 21 for a system controller (control computer). The system controller multiplies the count by the individual bit length in an effective data channel and the processing time is subtracted from a delay time thus obtained at both stations. Residual time difference between request and response is halved because the path between stations is doubled and the velocity of light is multiplied.

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    JP-2002202364-AJuly 19, 2002Clarion Co Ltd, クラリオン株式会社Method and apparatus for measuring distance
    JP-4520633-B2August 11, 2010クラリオン株式会社測距方法および測距装置