EP4394735A1 - Infrared safety system to improve the visibility of objects and infrared safety reflective element - Google Patents

Infrared safety system to improve the visibility of objects and infrared safety reflective element Download PDF

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Publication number
EP4394735A1
EP4394735A1 EP23216336.0A EP23216336A EP4394735A1 EP 4394735 A1 EP4394735 A1 EP 4394735A1 EP 23216336 A EP23216336 A EP 23216336A EP 4394735 A1 EP4394735 A1 EP 4394735A1
Authority
EP
European Patent Office
Prior art keywords
infrared
reflective element
safety
optical surface
safety reflective
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23216336.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Milan Honner
Petra Honnerova
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of West Bohemia
Original Assignee
University of West Bohemia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of West Bohemia filed Critical University of West Bohemia
Publication of EP4394735A1 publication Critical patent/EP4394735A1/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/004—Reflective safety signalling devices attached on persons
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/16—Anti-collision systems
    • G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes

Definitions

  • the invention relates to an infrared security system that ensures an increase in the visibility of objects when it is desirable to ensure maximum visibility from a security point of view, and when the natural visibility of the object with the human eye or a video camera is not sufficient to distinguish the object from its surroundings.
  • the invention further relates to an infrared safety reflective element. Typically, these are requirements for ensuring traffic safety in the operation of autonomous or human-controlled means of transport, participants in traffic or transport infrastructure.
  • Infrared thermographic cameras are used in vehicles to increase the visibility of surrounding objects as a driver assistance system or as part of autonomous vehicle sensors.
  • the reason is that the human eye or a video camera under reduced visibility conditions, such as darkness or fog, are not able to sufficiently distinguish surrounding objects, especially other means of transport, participants in traffic, traffic infrastructure, and thus there is an increased risk of a traffic accident.
  • a similar effect is achieved by the use of lights that illuminate the surroundings of the vehicle in the visible range for the driver, but reduce the visibility of the surroundings for drivers of oncoming vehicles.
  • the imaging of objects by an infrared thermographic camera is not affected by the aforementioned light problems that is why infrared thermographic cameras are used as driver assistance systems or as part of the sensors of autonomous vehicles.
  • Safety reflective elements are widely used to increase visibility. They can be found on the clothing of traffic participants, on vehicles and on the transport infrastructure. These reflective elements are based on the principle of retroreflectivity. They reflect visible light that comes from a light source in the direction of an observer who is connected to this source of illumination. Typically, this involves using the main or dipped beam of a moving car and reflecting it with the help of reflective elements, for example on bollards around the road, towards the driver of this car.
  • the safety reflective element preferably has the shape of a truncated cone or a truncated pyramid.
  • the functional optical surface of the safety reflective element can be applied directly to the surface of the object whose visibility is ensured and copies its shape.
  • the basic advantage of the infrared security system and the infrared security reflective element according to the invention is that they purposefully increase the visibility of the object using infrared thermographic cameras, beyond the normal state given by the natural temperature distribution of the object and its background.
  • the infrared safety reflective elements according to the invention provide sufficient contrast to distinguish the object from its background in a much wider spectrum of traffic situations, and thus enable a much more effective use of infrared thermographic cameras to ensure safety, for example in traffic.
  • infrared security system including the infrared security reflective element according to the invention
  • Another advantage of the infrared security system is that by using a greater number of these elements on an object, its characteristic shape can be visualized.
  • parts of the element that affect the processes of infrared radiation temporal changes in visibility for an infrared thermographic camera can be provided.
  • the benefit is a further increase in the information value of the use of these elements, which can, for example, better visualize dangers or direct the response of the driver or the control system of an autonomous vehicle.
  • the spatial orientation of the functional optical surface 2 with respect to the infrared thermographic camera 3 and the sky 18 is such that the infrared thermographic camera 3 is located in the reflection field 10 of the sky 5 .
  • this reflection field 10 of the sky 5 is defined by surrounding objects, for example trees, buildings, which prevent the infrared radiation of the sky 18 from impacting on the functional optical surface 2.
  • infrared safety reflective elements 1 when scanning traffic with an infrared thermographic camera 3 placed as part of vehicles is shown in Fig. 9 .
  • the purpose is to display the traffic situation and draw attention to danger.
  • the infrared safety reflective elements 1 fulfil their function if they are placed on non-moving parts of the transport infrastructure 22, such as on bollards, guardrails, building obstacles or as part of vertical or horizontal traffic markings.
  • the infrared safety reflective elements 1 also fulfil their function if they are placed on moving means of transport 20, such as on cars and trucks, trams, trolleybuses or bicycles, or on traffic participants 21 as, for example, part of clothing or luggage of pedestrians.
  • infrared safety reflective elements 1 when sensing traffic with an infrared thermographic camera 3 placed as part of the traffic infrastructure 22.
  • the purpose is to monitor traffic.
  • the infrared safety reflective elements 1 fulfil their function if they are placed on moving means of transport 20, such as on cars and trucks, trams, trolleybuses or bicycles, or on traffic participants 21 as, for example, part of clothing or luggage of pedestrians.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP23216336.0A 2022-12-27 2023-12-13 Infrared safety system to improve the visibility of objects and infrared safety reflective element Pending EP4394735A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2022-553A CZ309987B6 (cs) 2022-12-27 2022-12-27 Infračervený bezpečnostní systém pro zlepšení viditelnosti objektů a infračervený bezpečnostní odrazný prvek

Publications (1)

Publication Number Publication Date
EP4394735A1 true EP4394735A1 (en) 2024-07-03

Family

ID=89222491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23216336.0A Pending EP4394735A1 (en) 2022-12-27 2023-12-13 Infrared safety system to improve the visibility of objects and infrared safety reflective element

Country Status (2)

Country Link
EP (1) EP4394735A1 (cs)
CZ (1) CZ309987B6 (cs)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8854472B1 (en) * 2009-07-30 2014-10-07 Yasushi Nagamune Imagine capturing device and image capturing method
KR102132303B1 (ko) * 2019-11-13 2020-07-10 주식회사 동부아이씨티 열영상 카메라 및 레이더를 이용한 좌회전 대기 차량 감응 교통신호 제어 시스템
KR102154611B1 (ko) * 2019-05-17 2020-09-10 김대호 스크린 퍼팅 장치

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394303A (en) * 1981-05-12 1983-07-19 Chevron Research Company Large pore shaped hydroprocessing catalysts
US7541581B2 (en) * 2005-10-18 2009-06-02 Insight Technology Incorporated Clip-on infrared imager
US10025990B2 (en) * 2014-05-21 2018-07-17 Universal City Studios Llc System and method for tracking vehicles in parking structures and intersections
EP3583448A1 (en) * 2017-02-20 2019-12-25 3M Innovative Properties Company Personal protective equipment system using optical articles for integrated monitoring, alerting, and predictive safety event avoidance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8854472B1 (en) * 2009-07-30 2014-10-07 Yasushi Nagamune Imagine capturing device and image capturing method
KR102154611B1 (ko) * 2019-05-17 2020-09-10 김대호 스크린 퍼팅 장치
KR102132303B1 (ko) * 2019-11-13 2020-07-10 주식회사 동부아이씨티 열영상 카메라 및 레이더를 이용한 좌회전 대기 차량 감응 교통신호 제어 시스템

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Publication number Publication date
CZ2022553A3 (cs) 2024-04-10
CZ309987B6 (cs) 2024-04-10

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