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Method for determining the scope of detectability and readability of light signals

A technology of optical signal and distance, applied in the field of traffic signal, can solve the problem that there is no method to determine the readable distance of optical signal, and achieve the effect of increasing safety

Inactive Publication Date: 2007-10-24
DEUTSCHE BAHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In addition, there is as yet no method for determining the readable distance of an optical signal

Method used

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  • Method for determining the scope of detectability and readability of light signals
  • Method for determining the scope of detectability and readability of light signals
  • Method for determining the scope of detectability and readability of light signals

Examples

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Embodiment Construction

[0052] An advantageous embodiment of the method according to the invention for determining the detection and readable range of an optical signal is described below.

[0053] For self-luminous auxiliary indicators that have been used on rails for 15 years, their identification and readable distances should be determined. The symbol 100 displayed by the auxiliary indicator is shown in FIG. 1 . It is the letter "E". The symbol 100 consists of 16 light spots 101 . If these points of light are all switched on, a glowing "E" is obtained.

[0054] Determine the identification distance

[0055] In order to determine the recognition distance t of the luminous sign 100 for a certain direction n , and thus to determine the recognition distance of the switched-on auxiliary indicator, first measure the average optical density of each light spot 101 from this direction. To this end, a corresponding densitometric device is aligned with each single spot and the resulting measured value i...

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Abstract

To enable an accessing person Y to access a service related to an accessed person X even if he / she does not have an access code itself for accessing the accessed person X. A service center receives, as an extended reference request to personal information of a user U1, a mail containing a disclosing address T (U1_U2) and disclosing address T(U2_U3) from a user U 3 who is a referring person. The service center determines whether a referred person ID contained in the disclosing address T(U2_U3) is conformed to a referring person ID contained in the disclosing address (U1_U2) or not. The service center thereafter transmits and discloses personal information corresponding to a user ID_U1 of personal information stored in a personal information storage part according to a disclosure control content S corresponding to a relation level R contained in the disclosing address T (U1_U2) of a disclose control contents S stored in a disclosure policy storage part to the user 3 by mail.

Description

technical field [0001] The invention relates to a method for optical measurement and inspection of traffic signals, in particular light signals, as used in rail traffic. In particular, the invention relates to a method for determining the recognition distance and the readable distance of an optical signal under prominent background or ambient brightness. Background technique [0002] In rail traffic, signals are used to manage traffic. Typically, the signal is placed at or above the track. These signals serve as a source of information on traffic conditions, serve the tractor drivers of trains, and enable smooth and safe operation of rail traffic. [0003] These signals can be designed as so-called form signals. In arm-plate signals, signal terms are represented by shape changes of the signal. However, arm-plate signals are outdated and are increasingly being replaced by so-called optical signals. In optical signaling, the signal term is denoted by a specific optical ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61L5/18G01J1/28
CPCG01J1/42B61L5/1881G01J2001/4247
Inventor 托斯藤·莫勒尔艾克哈德·维尔赫莫
Owner DEUTSCHE BAHN