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KR-20260063832-A - AIDS TO NAVIGATION NIGHT VISIBILITY ASSESSMENT SYSTEM

KR20260063832AKR 20260063832 AKR20260063832 AKR 20260063832AKR-20260063832-A

Abstract

A nighttime visibility evaluation system for navigational aids is provided, comprising: at least one light source that emits light with at least one range; a backlight irradiator positioned behind the light source and irradiating backlight with at least one brightness in the direction of the light source; a luminance meter that measures the luminance of at least one light source and the luminance of the backlight irradiator adjusted to at least one brightness, respectively; a light source luminance storage unit that collects and stores the light source luminance according to the range of at least one light source from the luminance meter; a backlight luminance storage unit that collects and stores the backlight luminance according to at least one brightness of the backlight irradiator from the luminance meter; a brightness control unit that positions a tester, the light source, and the backlight irradiator in a straight line separated by a predetermined distance for visibility evaluation and adjusts the brightness of the backlight irradiator to at least one brightness; a visibility response collection unit that collects a response regarding visibility status from the tester to determine whether the light from the light source is visible according to at least one brightness; and within the visibility status of the response, visibility possible and visibility impossible. It includes an evaluation service providing server that includes a storage unit for calculating and storing the ratio of poets.

Inventors

  • 김현진
  • 이충진
  • 채정근
  • 박종현
  • 이동엽

Assignees

  • 한국항로표지기술원

Dates

Publication Date
20260507
Application Date
20241031

Claims (6)

  1. At least one light source that emits light with at least one range; A backlight irradiator located at the rear of the above-mentioned light source and irradiating backlight with at least one brightness in the direction of the above-mentioned light source; A luminance meter for measuring the luminance of at least one light source and the luminance of a backlight irradiator adjusted to at least one brightness, respectively; and An evaluation service providing server comprising: a light source luminance storage unit that collects and stores the luminance of a light source according to the light range of at least one light source from the luminance meter; a backlight luminance storage unit that collects and stores the backlight luminance according to at least one brightness of the backlight irradiator from the luminance meter; a brightness adjustment unit that positions a tester, a light source, and a backlight irradiator in a straight line at a predetermined distance apart for visibility evaluation, and adjusts the brightness of the backlight irradiator to the at least one brightness; a visibility response collection unit that collects a response regarding visibility status from the tester to determine whether the light of the light source is visible according to the at least one brightness; and a storage unit that calculates and stores a visibility ratio, which is the ratio of visible and unvisible within the visibility status of the response. A navigational aid night visibility evaluation system including
  2. In Article 1, The above evaluation service providing server is, A database unit that constructs a database regarding the luminance of the light source of the above-mentioned light source, the backlight luminance of the above-mentioned backlight irradiator, the visibility ratio according to visibility status, and the visibility status; A navigational aid night visibility evaluation system characterized by further including
  3. In Article 1, The above evaluation service providing server is, A basis-providing unit for modeling by constructing a dataset regarding the luminance of the light source, the backlight luminance of the backlight irradiator, the visibility ratio according to visibility status, and the visibility status according to the visibility ratio, and by learning, verifying, and testing such that when the luminance of the light source and the backlight luminance of the backlight irradiator are input into at least one machine learning model, the visibility ratio and the visibility status are output; A navigational aid night visibility evaluation system characterized by further including
  4. In Paragraph 3, The above evaluation service providing server is, A visibility inference unit that measures the luminance of the lighthouse and the backlight luminance of the backlight irradiator, respectively, using the luminance meter, and inputs this into the modeled machine learning model to output the visibility ratio and visibility status to evaluate visibility; A navigational aid night visibility evaluation system characterized by further including
  5. In Article 1, The above evaluation service providing server is, A backlight consideration unit that constructs a dataset of the luminous range and luminous value of a light bulb identified as having visibility based on the above visibility ratio, and the brightness and backlight luminous value of the above backlight irradiation device, and models by learning, verifying, and testing such that when the luminous range and luminous value of the above light bulb are input into at least one machine learning model, the model outputs the brightness and backlight luminous value of a visible backlight irradiation device, or when the brightness and backlight luminous value of the above backlight irradiation device are input, the model outputs the luminous range and luminous value of a visible light bulb; A navigational aid night visibility evaluation system characterized by further including
  6. In Article 1, The above evaluation service providing server is, An analysis unit that analyzes the correlation between the contrast between the luminance of the light source and the luminance of the background light, and the visibility ratio and visibility status; A navigational aid night visibility evaluation system characterized by further including

Description

AIDS TO NAVIGATION NIGHT VISIBILITY ASSESSMENT SYSTEM The present invention relates to a nighttime visibility evaluation system for navigational aids, and provides a system that establishes a standard for evaluating visibility by evaluating the nighttime visibility of navigational aids based on whether they are visible and the visibility ratio according to the difference in luminance between the light source and the background light. Aids to Navigation (AtoN) support the safe navigation of vessels by installing artificial facilities using means such as light, shape, color, sound, and radio waves in high-traffic waterways, ports, bays, straits, reefs, or shallow areas. An LED lantern for AtoN refers to a lighting fixture that indicates the location and function of a navigation aid by using a light source with LED modules, which is refracted and reflected using lenses or mirrors to collect and radiate light outwards. In the past, the placement of AtoNs relied on the experience of experts in the field; however, since the development of AtoN simulators, placement suitability is now quantified by calculating the distance between the vessel and the AtoN, as well as geographical and nominal luminous ranges. Recently, as lighting facilities in port areas have increased, backlighting has emerged as a new issue. At this time, a method for measuring the backlight of LED lights or navigational aids that enhance visibility at night has been researched and developed. In this regard, prior art, Korean Utility Model Published No. 2014-0002827 (published May 14, 2014) and Korean Registered Patent No. 10-1539061 (published July 23, 2015), respectively discloses a configuration of an LED light source comprising a support fixed to a hull, a body including a diffuser after stacking discs on the upper part of the support, and a lighting element including LED chips arranged at regular intervals inside the diffuser, and a configuration in which, when a backlight measuring device is activated, a light source is positioned, brightness, direction, and attitude are measured using a camera, and data is processed based on the brightness, direction, and attitude of the camera to output backlight. However, in the former case, only the structure of the LED lighthouse is disclosed, and no visibility evaluation regarding how the lighthouse appears when it overlaps with the background light is disclosed. In the latter case as well, the background light itself is measured based on illuminance meters and GPS, but the luminance contrast with the lighthouse, which affects visibility due to the background light, is not considered. Excluding situations of adverse weather, visibility deteriorates at night when a user looks at a navigational aid and a strong background light is present behind it. In other words, if the light emitted from the background light is greater than the light emitted from the navigational aid by a certain level or more, user visibility can be considered to deteriorate. Accordingly, visibility can be evaluated by comparing the light intensity between the lighthouse installed on the navigational aid and the background light, but this requires a standard for evaluating visibility. However, since the degree to which visibility is perceived varies from person to person, it is difficult to judge simply using mathematical formulas. Therefore, it is necessary to establish a standard for evaluating the visibility of navigational aids while taking background light into account. FIG. 1 is a drawing for explaining a navigational aid night visibility evaluation system according to one embodiment of the present invention. Figure 2 is a block diagram illustrating an evaluation service providing server included in the system of Figure 1. FIGS. 3 and FIGS. 4 are drawings for explaining an embodiment in which a visibility evaluation service according to an embodiment of the present invention is implemented. FIG. 5 is a flowchart illustrating a method for providing a visibility evaluation service according to an embodiment of the present invention. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals. Throughout the specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected" but also cases where they are "electrically connected" with other elements interposed between them. Furthermore, when a part is described as "including" a component, this means that, unless specifically stated otherwise, it does not ex