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Wyświetlanie 1-7 z 7
Tytuł:
Light beam control system of trams head lights
Autorzy:
Stypułkowski, K.
Tomczuk, P.
Powiązania:
https://bibliotekanauki.pl/articles/243858.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
tram
simulation
lighting distribution
tram lighting
front lighting
Opis:
Researches in the field of technology of modern sources of light have called for the introduction and application of a few basic hardware solutions of automatic correction systems of light beam position in the vertical and horizontal axes of a vehicle. Application of Adaptive Frontlighting Systems in motor vehicles has made it possible to adapt light parameters of head lights and fog lights to the actual situation on the road. The system ensures optimal observation conditions of a vehicle's foreground. These systems have contributed to the improvement of driving safety and comfort in the conditions of restricted visibility during fogs and precipitation. The authors of the present publication substantiate the need of introducing the solution of the foreground lighting of a vehicle, which has already proved effective for motor vehicles, taking into account the specificity of movement of a tram which is one of the main means of transport within the framework of urban public transport system. The article presents the current standardization requirements concerning head lights for the abovementioned means of transport. The results of laboratory photometric measurements for currently used optical light systems, as well as the results of simulation researches of the foreground lighting of a tram in street traffic have been demonstrated. Moreover, the article presents the analysis of potential solutions for the foreground lighting of a traction vehicle with the application of automatic system of light beam control. The proposal of a method of light beam choice taking into consideration specific movement conditions of a tram has been presented. Attention has been paid to the expected exploitation and economic effect of the application of the system for a company promoted to be used in a tram, as well as to the improvement of working conditions of a tram driver and the influence on other public transport users connected with travel safety and comfort. The publication emphasizes the merits of the proper use of already existing lighting solutions and their introduction into street traffic system of a tram. The improvement of the quality of the foreground lighting of a tram significantly increases the safety and comfort of all urban street traffic users.
Źródło:
Journal of KONES; 2008, 15, 2; 475-482
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lighting of trams foreground with the use of head and low beam lights – research
Autorzy:
Tomczuk, P.
Powiązania:
https://bibliotekanauki.pl/articles/245571.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
tram
simulation
lighting distribution
tram lighting
front lighting
Opis:
Recent progress within the area of front lighting of motor vehicles makes it possible to implement some technical solutions in other types of vehicles. High quality of front lighting is a factor required not only in motor vehicles. The article shall present the current state of front lighting of trams and qualitative analysis shall be presented of currently used light beams. The emphasis put on the quality of motor vehicle projectors, their constant development and application ofnew kinds of light sources, as well as application ofadvanced systems ofautomatic light beam direction does not translate into application ofthese solutions in tram vehicles. Safe movement of a trach vehicle is conditioned by the quality and state of its main lighting. Appropriate distribution of a light beam plays a significant role in the perception of luminous sensations from a vehicle's foreground. It ensures a proper assessment of behaviour of other road traffic participants and conditions proper visibility from a tram driver's seat. The analysis of tram line lighting shall be conducted on the basis of real photometric measurement data with the use of calculation programme having an advanced model of foreground lighting of the vehicle at its disposal. Lighting recommendations shall be presented taking into account the characteristics of light beams used in trams
Źródło:
Journal of KONES; 2009, 16, 3; 439-446
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposal of lighting requirements for lighting devices in adaptive front lighting system of trams head lights
Autorzy:
Stypułkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/247102.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
tram
simulation
lighting distribution
tram lighting
front lighting
Opis:
The paper presents the issues strictly connected with the scientific discipline of Transport, concerning the exploitation of lighting devices, reflectors and projectors being the fundamental devices for tram 's head lighting. The factor influencing the safety of a moving track vehicle is the quality and state of tram's head lighting. Appropriate light distribution within the area of tram's foreground plays a decisive role in the perception of luminous sensations by the tram driver. A properly shaped light beam conditions appropriate visibility from the tram driver's seat and facilitates correct assessment of traffic situations connected with the behaviour of other road traffic participants. The history of development of lighting devices for head lights used for trams has been discussed. The article proposes and discusses application of AFS system in trams particularly accounting for proposals of new lighting requirements for tram's head lighting devices. Particular attention has been paid to photometric requirements for projectors and reflectors of tram's head lights, presenting proposals for these requirements. After conducting a lighting analysis of currently exploited light beams it has been established that justification exists for using symmetrical light beams in the case of head, main and low beam lights. Introduction of three kinds of lights of dedicated light beams for low beam, main and curve lights is proposed.
Źródło:
Journal of KONES; 2011, 18, 4; 475-480
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proposal of lighting requirements for lighting devices in adaptive front lighting system of trams head lights
Autorzy:
Stypułkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/242053.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
tram
simulation
lighting distribution
tram lighting
front lighting
Opis:
The factor influencing the safety of a moving track vehicle is the quality and state of tram's head lighting. Appropriate light distribution within the area of tram's foreground plays a decisive role in the perception of luminous sensations by the tram driver. A properly shaped light beam conditions appropriate visibility from the tram driver's seat and facilitates correct assessment of traffic situations connected with the behaviour of other road traffic participants. The article proposes and discusses application of AFS system in trams particularly accounting for proposals of new lighting requirements for tram's head lighting devices. The author of the present paper justifies the need for implementing new solutions for lighting of tram's foreground in order to improve the quality of lighting taking into account various road traffic situations. For this purpose, new normative guidelines have been proposed allowing for assessment of lighting devices installed on trams, which directly influence the quality of tram's foreground lighting. Proposal for AFS system components for tram, measurement screen for examining projectors of symmetrical low beam lights, for examining projectors of symmetrical main lights, for examining the right projector of curve light and for examining the left projector of curve light are presented in the paper.
Źródło:
Journal of KONES; 2011, 18, 2; 405-410
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive control system of light beam position of trams head lights
Autorzy:
Stypułkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/242133.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
tram
simulation
lighting distribution
tram lighting
front lighting
Opis:
The article proposes and discusses the application of AFS system in trams. The author of the present publication substantiates the need of introducing the solution of foreground lighting of a vehicle, which has already proved effective for motor vehicles, taking into account the specificity of movement of a tram being one of the main means of transport within the framework of urban public transport system. Using the results of laboratory photometric measurements for currently used optical light systems of tram 's head lights, a proposal for the use of new light beams has been presented. The method of realization of adaptive system of light beam control of tram 's head lights has also been demonstrated. In relation to the current photometric requirements in standardization guidelines concerning head lighting of a tram, directions ofchanges have been proposed. Light beam shape of main lights in tram 's foreground defined by isolux range, proposal of automatic light beam control system of a tram, proposal of arrangement of system reflectors within the area of tram car's front are presented in the paper.
Źródło:
Journal of KONES; 2009, 16, 2; 433-439
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of visibility on pedestrian crossing - computational model
Autorzy:
Tomczuk, P.
Powiązania:
https://bibliotekanauki.pl/articles/242037.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
pedestrian lighting
road lighting
luminance
STV
Opis:
As statistical analyses conducted by The National Police Headquarters indicate, pedestrian crossing which is supposed to be a safe place for unprotected participants of road traffic is an area where about 10% of road accidents occur in which at least 3500 persons are injured, and over 200 die annually. Despite constant development of road infrastructure in Poland, this situation fails to improve in the expected way. Several reasons of this state of affairs can be detected. Undoubtedly a decisive factor in pedestrian safety at night-time is ensuring the drivers proper observation conditions of pedestrian crossings. The article will present assessment of lighting of pedestrian crossings making use of Small Target Visibility model. Due to the use of luminance and contrast criterion, it is possible to assess visibility level - a key parameter responsible for perception of a pedestrian by a driver on pedestrian crossings. Graphic chart showing accidents with pedestrian participation in the European Union, target for visibility research by means of STV method on pedestrian crossing, visibility level VL by means of STV method, Location of objects on pedestrian crossing by means of STV method, pedestrian crossing illuminated by lighting frames, visibility level on pedestrian crossing obtained as a result of lighting frames illumination from the first and second observation direction are presented in the paper.
Źródło:
Journal of KONES; 2011, 18, 2; 411-418
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Objective tests of headlamps in exploitation conditions from traffic safety point of view
Obiektywne badania reflektorów samochodowych w warunkach eksploatacji pod kątem bezpieczeństwa ruchu
Autorzy:
Targosiński, T.
Powiązania:
https://bibliotekanauki.pl/articles/243104.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
oświetlenie pojazdów
reflektory
wiązka świetlna
ocena
vehicle lighting
headlamps
beam pattern
assessment
Opis:
From many years the only exploitation activity regarding headlamps is visual aiming on the base of cut-off line. From one side there are many advanced headlamp designs with excellent performance including gas discharge devices or LED's as light source. In last few years there are many efforts towards to work out laboratory objective quality assessment methods. An example is works of technical committee CIE TC4-45. But in exploitation significant numbers of vehicles are equipped with low quality headlamps installed after repairs. Also many plastic lenses are scratched and tarnished and inside parts of headlamp are dusty. Results of this problems are not noticed during simple periodical technical inspection. In Motor Transport Institute headlight analyzer was worked out. It utilizes CCD camera and computer image analysis and allows test detailed characteristics of beam pattern in garage conditions in objective way. Using these device measurements of many vehicles in exploitation conditions was done. There was find out that significant percentage of headlamps in use does not meet minimum type approval requirements. In paper results of tests are presented and main factors responsible for difference between type approval and exploitation are described.
Źródło:
Journal of KONES; 2007, 14, 2; 493-504
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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