WO2001015116A1 - Systeme d'observation meteorologique pour le trafic routier et systeme d'emission spontanee de signaux routiers - Google Patents
Systeme d'observation meteorologique pour le trafic routier et systeme d'emission spontanee de signaux routiers Download PDFInfo
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- WO2001015116A1 WO2001015116A1 PCT/JP2000/005664 JP0005664W WO0115116A1 WO 2001015116 A1 WO2001015116 A1 WO 2001015116A1 JP 0005664 W JP0005664 W JP 0005664W WO 0115116 A1 WO0115116 A1 WO 0115116A1
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- Prior art keywords
- road
- self
- information
- luminous
- sign
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
- G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
- G08G1/096741—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where the source of the transmitted information selects which information to transmit to each vehicle
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
- G08G1/096758—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where no selection takes place on the transmitted or the received information
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
- G08G1/096775—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a central station
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
- G08G1/096783—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a roadside individual element
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S362/00—Illumination
- Y10S362/80—Light emitting diode
Definitions
- the present invention provides a road traffic meteorological observation system that observes weather conditions such as fog and snowfall on roads, analyzes the weather conditions based on the observation data, and predicts dangers in the driving environment.
- the present invention relates to a self-luminous road sign system that provides gaze guidance and information display.
- a system for supporting the safety of road traffic there is a system that uses an ITV camera as a device for detecting a road condition and displays a detection output from the ITV camera on a control device having a display unit (hereinafter, a conventional technology). 1).
- a road manager who controls this controller makes comprehensive judgments based on the road information displayed on the display, road information of other areas, weather forecasts, and the like.
- weather information on the road is provided to the driver, and signs for safe driving are made.
- Conventional self-luminous road facilities include, for example, a self-luminous information board that conveys road information to the driver, and a line-of-sight guidance system equipped with an LED that displays a line of curve along the curve of the road and guides the line of sight. Signs and the like are used.
- the light-emitting portions of these self-luminous road facilities are controlled to have a constant luminance, or are controlled to have their respective luminances during the daytime and at night, that is, so-called two-step luminance control.
- a road safety driving support system (hereinafter referred to as “prior art 2”) described in Japanese Patent Application Laid-Open No. 9-1128688 is a system that uses a visibility meter that detects the driving environment of a road and an obstacle detection radar. Obstacle detection means, and display / warning means controlled based on the output of the obstacle detection means. An obstacle detection / warning device integrating these means is provided on the median strip of the road. Or the road side The ones that are installed one after another are disclosed.
- the display / warning means is integrated with the obstacle detection / warning device, and the obstacle detection / warning device is installed continuously on the median strip or on the road side of the road.
- the display warning means has a display mode using one or a combination of sound, character display, indicator lamp color, brightness, blinking interval, and the like.
- an ITV camera is used as a device for detecting a road condition, but the ITV camera is very expensive, and when it is installed, it must be installed on a large gate post or a large system. There is. Furthermore, in order to provide detailed information to the driver, it is necessary to install many ITV cameras where necessary. Therefore, it is practically impossible to set many of these ITV cameras in the above-mentioned configuration. In addition, since this system is comprehensively determined by the road manager, it takes a lot of time and cannot provide information in real time.
- the road manager does not perform centralized management, and the local This system supports the driver's safe driving by providing personal and fixed individual information. Therefore, it is difficult to properly grasp the situation of fog and snowfall over a wide area, and to support safe driving in response to changes in weather conditions or moving site conditions in a given area.
- the display warning means provides a single information to warn in case of a road obstacle
- the display of the information does not take into account a decrease in visibility when visibility is poor.
- the present invention has been made in order to solve these problems.
- a road manager or the like receives the information and informs a driver in real time.
- the primary objective is to provide a road traffic weather observation system that can contribute to the safe driving of vehicles by providing weather information.
- FIG. 1 is a conceptual block diagram showing the configuration of the road traffic weather observation system of the present invention
- the road traffic weather observation system of the present invention And a plurality of sensor units for detecting a weather condition in the observation area.
- the weather information detected by each of the sensor units 1-1 is centrally managed, and the observation area is determined based on the weather information. It is equipped with an information processing management unit 2 that analyzes weather conditions inside the vehicle and predicts danger in the driving environment.
- the sensor unit 1-1 may be arranged at each vertex of the triangle in the observation area divided into a plurality of triangles.
- the sensor unit '1 has a configuration including at least a visibility meter and an illuminometer among a visibility meter, an illuminometer, a wind direction anemometer, and a thermometer.
- the visibility meter can obtain visibility information on the particle concentration of the air in the road environment and the brightness of the outside air, and the illuminance can be obtained. With the meter, the background luminance of the road can be obtained.
- the fog generation intensity fluorescence, temperature, temperature, and humidity, temperature, and humidity, temperature, and temperature, temperature, and temperature,
- the road traffic weather observation system is provided with road facilities 4-4 that output and display the output information processed by the information processing management unit 2 via the network communication means 3 connected by wire or wirelessly.
- road facilities 4-4 that output and display the output information processed by the information processing management unit 2 via the network communication means 3 connected by wire or wirelessly.
- the output information processed by the information processing management unit may be configured to be distributed to the Internet 5 by wire or wireless.
- weather information on the road environment can be obtained in real time by each terminal 6-6 connected to the Internet 5, which is convenient.
- the self-luminous road sign system of the present invention includes a sensor unit for detecting a weather condition, a self-luminous road facility provided with a sign unit having a light-emitting body, and weather information detected by the sensor unit.
- a control unit for controlling the light emission luminance or information display of the sign unit.
- the sign section includes, for example, a light-emitting device for guiding a line of sight such as a delineator, a road information board on which character information is displayed, and a sign such as an arrow sign. It refers to a device that uses a luminous body.
- the sensor unit has a visibility meter and an illuminometer
- the control unit has a predetermined contrast based on the background luminance of the road obtained by the illuminometer in advance. It is configured to calculate the optimum light emission luminance of the driving environment, and control the light emission luminance or information display of the sign portion based on the visibility information output by the visibility meter based on the optimum light emission luminance. ing.
- the emission brightness of the self-luminous light emitting road facility is appropriately controlled, and information can be provided to the driver of a vehicle in the visibility impaired area in a display form or a sign form with good visibility, thereby enabling safe driving. Can be donated.
- the above-mentioned sign section may be constituted by a gaze guide sign, or may be constituted by a self-luminous information plate.
- a configuration may be provided in which a road facility unit is provided in which the sensor unit and the self-luminous road facility are integrated.
- the road facility unit be configured to control the emission luminance or the information display of the sign section in the road facility unit and at least one other road facility by wire or wirelessly.
- control unit may control the light emission luminance of the sign unit of the self-lighting road facility so that the pulse width of the pulse voltage applied to the light emitting body is set to a width at which a predetermined light emission luminance can be obtained. Good. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a conceptual block diagram showing the configuration of the road traffic weather observation system of the present invention.
- FIG. 2 is an explanatory diagram for describing an embodiment of the road traffic weather observation system of the present invention.
- FIG. 3 is a diagram for explaining the principle of the transmission type visibility meter used for the sensor unit of the embodiment of the road traffic weather observation system of the present invention.
- FIG. 4 is a diagram for explaining the principle of a reflection type visibility meter used for the sensor unit of the embodiment of the road traffic weather observation system of the present invention.
- FIG. 5 is a diagram for explaining a method for automatically controlling the light emission luminance of a light emitting road facility in each embodiment of the road traffic weather observation system and the light emitting road signage system of the present invention.
- FIG. 6 is a block diagram for explaining a method for automatically controlling the light emission luminance of a light emitting road facility in each embodiment of the road traffic weather observation system and the light emitting road signage system of the present invention.
- FIG. 7 is a block diagram for explaining a controller according to the sensor unit of the embodiment of the road traffic weather observation system of the present invention.
- FIG. 8 is a diagram showing an outline of a network applied to the embodiment of the road traffic weather observation system of the present invention.
- FIG. 9 is a diagram for explaining an example of the arrangement of sensor units applied to the embodiment of the road traffic weather observation system of the present invention.
- FIG. 10 is a diagram showing the occurrence of fog in a specific area over time.
- FIG. 11 is an explanatory diagram for describing an embodiment of the self-luminous road sign system of the present invention.
- FIG. 12 is a block diagram for explaining an embodiment of the self-luminous road sign system of the present invention.
- FIG. 13 is a diagram for explaining an example in which the self-luminous road sign system of the present invention is applied to a gaze guidance sign equipped with a visibility meter, and is a front view of the gaze guidance sign.
- FIG. 14 is an explanatory diagram for explaining a method of controlling the pulse width of the pulse voltage applied to the light emitter provided in the sign section of the road facility in the self-luminous road sign system of the present invention.
- FIG. 15 is a block diagram of another embodiment of the self-luminous road sign system of the present invention.
- FIG. 16 is a diagram for explaining an example in which the self-luminous road sign system of the present invention is applied to a self-luminous information board equipped with a visibility meter, and is a front view of the self-luminous information board.
- FIG. 17 is a diagram for explaining an example of information display when the self-luminous road sign system of the present invention is applied to a self-luminous information board.
- FIG. 2 is an explanatory diagram for describing an embodiment of the road traffic weather observation system of the present invention.
- the road traffic weather observation system of the present embodiment centrally manages the sensor units 22 that detect the weather conditions in the observation area of the road 28, and the weather information detected by each of the sensor units 22. It has an information processing management unit 20 that analyzes weather conditions in the observation area based on the information and predicts danger in the driving environment. A plurality of sensor units 22 are arranged in the observation area of the road 28 (not shown).
- a road facility for outputting and displaying the output information processed by the information processing management unit 20 is provided.
- the road facilities include a road information board 24 and a delineator 25. These road facilities and the sensor unit 22 are all wired by LAN, and further connected to a concentrator 23 for collective information collection.
- the road information is transmitted via the concentrator 23 to a center server (not shown) of the information processing management unit 2 ⁇ which performs information management.
- information from the information processing management unit 20 is provided to the driver via the concentrator 23 via road facilities such as a road information board 24 and a delegate 25 or via the Internet. You.
- the information processing management unit 20 includes a road management unit 26 that performs a determination process of a road manager, and an information processing unit 2 that performs predetermined data processing described below based on data collected from each sensor unit 22. 7 for monitoring weather information over time and forecasting the future.
- Sensor unit 22 is made up of a visibility meter, an illuminance meter, an anemometer, a thermometer, etc. It is composed.
- the visibility meter is a meteorological observation device that measures the concentration of suspended solids in the atmosphere by irradiating near infrared rays and also measures the brightness of the outside air.
- the transmission visibility meter measures the horizontal transmittance between two points of the concentration of micro suspended matter in the atmosphere, and calculates the visibility value based on the transmittance.
- the reflection-type visibility meter measures the concentration of minute suspended matter in a limited area by the forward scattering method using the scattering of suspended matter in the atmosphere, and converts it into a visibility value. All of these visibility meters calculate the visibility value by calculating the amount of change in the amount of light received by the projector 31, the near-infrared-emitting light receiver 31, and the near-infrared light-receiving receiver 32.
- the control arithmetic circuit 33 is provided. As shown in Fig. 3 (a), in the transmission type perimeter, 100% of the near-infrared ray emitted from the projector 31 is received by the receiver 32 when there is no suspended matter 8, but as shown in Fig. 3 (b). As shown in FIG.
- the visibility meter configured as above plays an important role as a sensor, and controls the display or sign output of each road facility such as the road information board 24 and the delineator 25 based on the detected data. This has achieved the goal of safe driving.
- an illuminometer is provided with this visibility meter. This illuminometer measures the illuminance in the running environment such as fog and snow day and night. Based on the data measured by the illuminometer, the luminance of the luminous body that constitutes the display or signage of the self-luminous road facility is automatically controlled so that the driver's eyes have appropriate contrast. I have. With this visibility meter and illuminometer, the luminous brightness of the luminous body of the self-luminous road facility is automatically controlled. The control method will be described with reference to FIGS.
- FIG. 5 is a diagram for explaining a method of automatically controlling the light emission luminance of a self-light emitting road facility applied to the embodiment of the present invention.
- FIG. 6 is a block diagram for explaining a self-luminous road facility applied to the embodiment of the present invention.
- This background luminance is the reflection luminance of sunlight, and the reflection luminance of snow white is set as an example.
- the environmental illuminance is calculated based on the illuminometer measurement data (STEP. 1). Contrast is expressed as the difference or ratio between the light emission luminance of the light emitter and the background luminance or the ratio between the difference between the two and the background luminance.
- the light emission luminance A at which this contrast is constant against the change in background luminance is calculated (STEP. 2).
- a predetermined light emission luminance is obtained based on the transmittance calculated from the value measured by the visibility meter. Correct the emission brightness A as follows (STEP. 3). The driving of the luminous body is controlled so that the luminous luminance of the luminous body of the self-luminous road facility becomes the corrected luminous luminance (luminous luminance B) (STEP. 4).
- the above method is realized by the optimum luminance calculation circuit 60 shown in FIG.
- the optimum luminance calculation circuit 60 includes an A / D conversion circuit 61 for performing AZD conversion of measurement data from the illuminometer and the visibility meter, a calculation circuit 62 for performing the above-described calculation of the emission luminance A and the emission luminance B, and a self-emission.
- a light emission control circuit 63 for controlling the light emission luminance of the light emitter of the road facility 64 to the light emission luminance B is provided.
- the sensor unit 22 is provided with a wind direction / anemometer for measuring the wind direction and the wind speed, and a thermometer, and further accumulates respective weather data.
- the sensor unit 22 is provided with a controller 21 for communicating with the information processing management unit 20 via the concentrator 3.
- the controller 21 is provided with a communication circuit to enable a wired or wireless communication line.
- various measurement data relating to the ever-changing weather condition can be obtained by the sensor unit 22, and the measurement data is supplied to the information processing management unit 20 as weather data.
- the road information board 24 displays multi-function information in which predetermined character information is displayed according to the driving environment of the road 28 and information to be displayed is displayed based on the above-mentioned weather data. It is a board. This multifunctional information board can display such information alternately, and can provide much information.
- the display portion is automatically dimmed based on the visibility value and the illuminance obtained by the visibility meter and the illuminometer, respectively. Is automatically controlled to
- the delineator 25 is for performing gaze guidance, and is a self-luminous type. As described above, the deli-eater 25 is also automatically dimmed based on the obtained visibility value and illuminance, and is automatically controlled so that the driver's eyes have appropriate contrast according to the weather conditions on the road 28. You.
- the concentrator 23 reports the operation status of these facilities in the driving environment of the road 28 through facility communication information (brightness, display characters, operation status) and weather measurement data through TCPZIP (Transmission Control Protocol / Internet Protocol) communication means. (Visibility distance, illuminance, wind / wind speed, temperature), and transmits the digital video to the center server of the information processing management unit 20 that manages information collectively.
- FIG. 7 is a block diagram for explaining a controller according to the sensor unit of the embodiment of the road traffic weather observation system of the present invention.
- the controller 21 installed close to or integrated with the sensor unit 22 has a visibility value based on the visibility data obtained by the sensor unit 22. Supply the measurement data (visibility data, etc.), meteorological data and output information of the arithmetic circuit 33 obtained by the sensor unit 22 to the information processing section 20 via a communication line.
- the communication circuit 34 is provided. Further, the controller 21 installed near or integrated with the road information board 24 supplies output information from the information processing unit 20 to each road facility.
- FIG. 8 is a diagram showing an outline of a network in such a system.
- measurement data and weather data obtained from the sensor units 22 to 22 are supplied to the information processing device 27 via the network 29.
- the information processor 27 analyzes these data, predicts a danger, and provides the danger prediction information to the driver in various forms by the above-described road facility.
- FIG. 9 is a diagram for explaining an example of arrangement of sensor units when such a configuration is applied.
- the sensor units 22 are arranged so as to form a triangle so that the detection area includes a road environment environment area.
- another sensor unit 22 is added to the triangle shown in FIG. 9 (a) as shown in FIG. 9 (b).
- the sensor unit 22 can be configured in a wide area as shown in FIG. 9 (c) or FIG. 9 (d).
- the distance between these sensor units 22 ... 22 is between 0 and 100 m. Force is usually 50 Om.
- the arrangement of the sensor unit 22 As described above, it is preferable that the detection area of the sensor unit 22 is disposed so as to include the driving environment area of the road. It is preferable to dispose them appropriately in consideration of the objects and the difficulty of installation.
- Fig. 10 is a diagram showing the fog generation status over time in a specific area, and shows that the state of Fig. 10 (a) has changed to the state of Fig. 10 (b) over time. Things.
- the area 81 shown by oblique lines has a visibility distance of 800 to 100 m
- the area shown by a grid pattern 82 has a visibility distance of 100 to 500 m
- the area shown by black 8 3 indicates that the visibility distance is 100 m or less.
- the area 83 has a short visibility distance, and indicates that the area is expected to be dangerous.
- Such weather information and forecast information are provided to the driver in real time and in a visually crisp display state by the road facilities and the Internet described above, so that the driver can drive safely.
- FIG. 11 is an explanatory diagram for describing an embodiment of the self-luminous road sign system of the present invention.
- the road facility is provided with a self-luminous road sign section, and has various features described later in this configuration.
- the sensor unit 22, the self-luminous road information board 35 as a road facility, the gaze guide sign 55, and the self-luminous road facilities are provided along the road side of the road 28.
- the sensor unit 22, the self-luminous road information board 35, the gaze guidance sign 55, and the controller 36 are connected by wired or wireless communication means, and the controller 36 is connected via this communication means. It is configured to supply information controlled based on measurement data and weather data of the driving environment to self-luminous road facilities.
- Self-luminous road facilities such as the self-luminous road information board 35 and the gaze guide sign 55 are provided with luminous bodies for performing self-luminous display.
- the luminous bodies include LED, laser, EL, and UV lamp. And an optical fiber that emits light by guiding light from a light source is used without any particular limitation.
- FIG. 12 is a block diagram for explaining an embodiment of the self-luminous road sign system of the present invention.
- the controller 36 installed near the sensor unit 22 is composed of an arithmetic circuit 33 and a communication circuit 34.
- the arithmetic circuit 33 calculates a visibility value or the like based on the visibility data obtained by the sensor unit 22, and outputs the calculated values based on the weather data obtained by the sensor unit 22. P 2,... Output a control signal for controlling the light emission of n.
- the communication circuit 34 is configured to supply a control signal from the arithmetic circuit 33 to the light emitters P1, P2, and -Pn.
- the gaze guidance sign 55 shown in Fig. 13 (a) is a delineator 4 in which a transmission type visibility meter 45 is used as a visibility meter, and a luminous body such as an LED is provided on the support 43. 1 and light emitter 42 are attached.
- the deleniator 41 is similar to the deliniator 25 described above, and the controller 36 automatically controls the light emission luminance so that the driver's eyes have appropriate contrast according to the weather conditions on the road 28. However, it enables appropriate gaze guidance.
- the display form there are an arrow sign and an arrow sign.
- the light emitter 42 is It warns the driver of a danger when the visibility is less than 100 m and alerts the driver.
- the transmission type visibility meter 45 has the same configuration as that used in the above-described embodiment, and has the same principle as that shown in FIG. In the present embodiment, the transmissive visibility meter 45 has the projector and the light receiver provided in the horizontal direction, but may be provided in the vertical direction.
- a gaze guidance sign 55 shown in FIG. 13 (b) uses a reflection type visibility meter 46 as a visibility meter, and the other configuration is the same as that of the gaze guidance sign 34 shown in FIG. 13 (a).
- the reflection type visibility meter 46 has the same configuration as that used in the above-described embodiment, and has the same principle as that shown in FIG. In the present embodiment, the reflection type visibility meter 46 has a projector and a light receiver provided in the vertical direction, but may be provided in the horizontal direction.
- the measured data is transmitted to the controller 36 described above.
- the controller 36 controls the emission luminance of the delineator 41 or the light emitter 42 based on the measurement data or the like, as described above, by wire or wirelessly. Further, the controller 36 outputs a signal for controlling the light emission luminance of the other light-emitting road facility to the controller 49 of the other light-emitting road facility. It can control the light emission brightness and display content of the facility.
- the self-luminous road facility is controlled to the optimal luminance as described with reference to Figs.
- description based on FIGS. 5 and 6 is omitted.
- this dimming method a method of controlling the pulse width of the pulse voltage applied to the light emitting body so as to obtain a predetermined emission luminance is used.
- the pulse used is a high-speed pulse in which the eyes cannot recognize blinking.
- FIG. 14 shows a voltage waveform having such a pulse width.
- Figures 14 (a), (b), (c), and (d) are 100%, 50%, 30%, and 0%, respectively.
- pulse voltage waveform applied in the case of% lighting.
- these pulse voltage waveforms for example, when 50% is lit, one pulse may be 50%, or a total of pulses in a certain time may be 50%. Note that such pulse voltage waveforms are not limited to those shown in FIG. 14, but are set as appropriate.
- a controller 36 similar to that shown in FIG. Is provided.
- an arithmetic circuit 33 for arithmetically controlling information display, visibility distance, identification address of the sensor unit 22, etc. emitted to the plurality of self-luminous information boards 51 is provided.
- the controller 36 includes a communication circuit 34 for providing output information from the arithmetic circuit 33 to each self-luminous information board 51 via a communication interface 57 by wire or wireless. ing .
- This configuration can be applied, for example, when performing centralized management in a remote place, and serves as an interface for communication with a computer responsible for the centralized management.
- FIG. 16 shows a self-luminous information board applied to a gaze guide sign equipped with a visibility meter similarly to FIG.
- the self-luminous information board shown in Fig. 16 (a) is a transmissive visimeter 45 as a visibility meter
- the self-luminous information board shown in Fig. 16 (b) is a reflective visimeter 46 as a visibility meter. Is shown.
- the reflection type visibility meter 46 always measures the visibility, and the controller 36 calculates the visibility distance based on the measurement data, converts the visibility information into light emission luminance and display information, and controls the visibility within the control circuit or the interface.
- One face 57 transmits the identification address of the visibility meter and visibility information.
- the communication interface 57 transmits to the host computer, and the host computer transmits display information to each self-luminous information board 51. Does not have a host computer In such a case, the communication interface 57 transmits display information to each light emitting information board 51.
- the self-luminous information plate 51 that has received the visibility information determines to output the information when the information is within the relevant jurisdiction area.
- control is performed to optimize the light emission brightness, and display information such as "safe driving”, “driving attention”, “forward warning”, and “rear collision warning” is displayed. Is selected and displayed.
- display information such as "safe driving”, “driving attention”, “forward warning”, and “rear collision warning” is displayed. Is selected and displayed.
- the emission luminance is controlled by changing the pulse width of the high-speed pulse as shown in FIG. 14 described above.
- the self-luminous road sign system of the present embodiment can be a system using a host computer as described above. In this case, it is possible to apply the road traffic weather observation system of the present invention which is centrally managed by a computer. Industrial applicability
- the road traffic weather observation system of the present invention is useful in that it can appropriately grasp weather conditions over a wide area and can contribute as an information source for automatic operation of a wide area road information system.
- the system is also excellent in that it can provide such weather conditions to drivers in real time and prevent accidents from occurring.
- this system is expected to be able to analyze more precisely by elucidating the mechanism of the occurrence of accidents in road traffic and accumulating basic data in the driving environment.
- the self-luminous road facility controls the luminous brightness or the information display corresponding to the visibility information based on the optimal luminous brightness, so that the visibility of the characters and signs indicating the display information is reduced. This is useful in that it can improve and contribute to the safe driving of the driver.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001519401A JP4005358B2 (ja) | 1999-08-24 | 2000-08-23 | 自発光道路標識システム |
AU67272/00A AU6727200A (en) | 1999-08-24 | 2000-08-23 | Road traffic weather observation system and self-emission road sign system |
US09/807,441 US6812855B1 (en) | 1999-08-24 | 2000-08-23 | Road traffic weather observation system and self-emission road sign system |
EP00954949A EP1143399A4 (en) | 1999-08-24 | 2000-08-23 | METEOROLOGICAL OBSERVATION SYSTEM FOR ROAD TRAFFIC AND SYSTEM FOR SPONTANEOUS TRANSMISSION OF ROAD SIGNALS |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23760699 | 1999-08-24 | ||
JP11/237606 | 1999-08-24 | ||
JP11/248447 | 1999-09-02 | ||
JP24844799 | 1999-09-02 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/892,249 Division US7095337B2 (en) | 1999-08-24 | 2004-07-16 | Road traffic weather-monitoring system and self-luminous road sign system |
Publications (1)
Publication Number | Publication Date |
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WO2001015116A1 true WO2001015116A1 (fr) | 2001-03-01 |
Family
ID=26533279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/005664 WO2001015116A1 (fr) | 1999-08-24 | 2000-08-23 | Systeme d'observation meteorologique pour le trafic routier et systeme d'emission spontanee de signaux routiers |
Country Status (5)
Country | Link |
---|---|
US (2) | US6812855B1 (ja) |
EP (1) | EP1143399A4 (ja) |
JP (1) | JP4005358B2 (ja) |
AU (1) | AU6727200A (ja) |
WO (1) | WO2001015116A1 (ja) |
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CN103680180A (zh) * | 2012-09-13 | 2014-03-26 | 腾讯科技(深圳)有限公司 | 一种交通状况信息提示方法和系统 |
Also Published As
Publication number | Publication date |
---|---|
AU6727200A (en) | 2001-03-19 |
EP1143399A1 (en) | 2001-10-10 |
US6812855B1 (en) | 2004-11-02 |
US7095337B2 (en) | 2006-08-22 |
EP1143399A4 (en) | 2005-05-25 |
JP4005358B2 (ja) | 2007-11-07 |
US20050001739A1 (en) | 2005-01-06 |
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