JP2013045538A - Luminaire at tunnel entrance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire at tunnel entrance capable of controlling the amount of irradiation of an illumination fixture continuously while reducing power consumption.SOLUTION: In a fixed interval from tunnel entrance, in the luminaire at the tunnel entrance capable of controlling the light so as to reduce the amount of irradiation of an illumination fixture gradually from the lightness corresponding to the outdoor brightness on the entrance side to the lightness of basic illumination on the back side of a tunnel, a luminance meter is provided on the outside of the tunnel, a plurality of LED illumination fixtures are provided in the tunnel entrance, the luminance meter and the LED illumination fixtures are connected via a controller, and the amount of irradiation of the LED illumination fixtures is controlled continuously by an output signal corresponding to the outdoor brightness emitted from the controller.

Description

  The present invention relates to a lighting device at a tunnel entrance that can reduce the amount of power used and can adjust the irradiation amount of a lighting tool in a stepless manner.

  Japanese highways have many routes that pass through mountainous areas, so there are inevitably many tunnels. Generally, tunnels are equipped with more facilities than outdoor roads, so energy conservation is an important issue. ing. In particular, for lighting devices that are the main equipment of tunnels, development of energy-saving and environmentally friendly lighting systems is required.

  As an illumination device for the tunnel, for example, as shown in Patent Literature 1 and Patent Literature 2, there is an illumination device provided at an entrance called entrance illumination. This is a device installed to alleviate the rapid brightness change that occurs when a driver enters the tunnel in the daytime and the delay in adaptation of the eyes that occurs immediately after the intrusion. The lighting is dimmed so that the brightness is gradually reduced so that the eyes do not feel uncomfortable.

  Further, as a light source of the lighting device at the tunnel entrance, a high-pressure metal vapor discharge lamp such as a high-pressure sodium lamp or a ceramic metal halide lamp is widely used. Since this high-pressure metal vapor discharge lamp cannot be turned on again after a certain period of time has elapsed after it has been turned off, if the outdoor brightness decreases due to sudden rain showers, etc. When the brightness increases, there is a problem in that the illumination tool cannot be turned on immediately even if a lighting signal is output, and the brightness of the entrance illumination does not follow the outdoor brightness. There is also a problem of high power consumption.

  On the other hand, as an example of the dimming method of the amount of illumination when using a conventional high-pressure metal vapor discharge lamp or fluorescent lamp, four power lines are prepared, and four are controlled according to the outdoor luminance. All power lines are turned on, one power line is turned off, three power lines are turned on, two power lines are turned off, two power lines are turned on, only one power line is turned on, etc. In addition, a control means is employed in which control is performed so as to select any one of the four stages and the brightness is changed according to the selected condition.

  That is, the dimming in this case is a control method in which all lamps connected to the line are turned on / off by switching on / off the power line, and one of four steps is selected. The amount of change in irradiation amount between levels was large. As a result, there is a problem that the driving environment is deteriorated because the driver feels uncomfortable when the control level is switched. Furthermore, for example, when a lighting amount of 51% is required, a command for 75% lighting (one power line is turned off and three power lines are turned on), which is a level not lower than the control condition, is issued. There was a problem that the light would be lit when the power consumption exceeded 10% or more.

  In order to avoid this, it is conceivable to reduce the stepwise change between each level by reducing the control conditions, but the problem is that the control conditions are complicated, the structure is complicated, and the equipment cost is high. there were. In addition, there remains a problem that it is difficult to quickly follow the lighting of the lamp for the on / off control of the lamp. Furthermore, in conventional high-pressure metal vapor discharge lamps and fluorescent lamps, the on / off control of the switch makes it impossible to change the lamp dose in a stepless manner, and does not give the driver a sense of incongruity. There has been a demand for the development of a stepless light control method.

JP 2010-225559 A Japanese Patent Laid-Open No. 5-135880

  The present invention solves the problems as described above, and can optimally control the illumination amount of the illuminator in accordance with the outdoor luminance, thereby reducing the amount of power used. It was completed for the purpose of providing a lighting device at the entrance of a tunnel that can adjust the amount of light in a stepless manner and provide a comfortable driving environment to the driver.

  The lighting device at the tunnel entrance of the present invention, which has been made to solve the above-mentioned problems, illuminates from the brightness corresponding to the outdoor brightness on the entrance side to the brightness of the basic illumination on the back side of the tunnel in a certain distance from the tunnel entrance. A lighting device at a tunnel entrance that can be dimmed so as to gradually reduce the irradiation amount of the fixture, provided with a luminance meter outside the tunnel, and provided with a plurality of LED lighting fixtures inside the tunnel entrance, the brightness The meter and the LED illuminator are connected via a controller, and the irradiation amount of the LED illuminator is dimmed in a stepless manner by an output signal corresponding to the outdoor luminance emitted from the controller. It is what.

  A level selection board and an electromagnetic switch are connected to the luminance meter, and a plurality of power supply lines are connected to the electromagnetic switch, and a plurality of LED illuminators are arranged along each power supply line, It is preferable that these LED illuminators are connected to a luminance meter via a controller, and this is the invention according to claim 2.

  In the invention according to claim 1, a luminance meter is provided outside the tunnel, and a plurality of LED illuminators are provided in the tunnel entrance, and the luminance meter and the LED illuminator are connected via a controller. Since the illumination intensity of the LED illuminator is dimmed in a stepless manner by the output signal corresponding to the outdoor brightness emitted from the controller, the brightness of the tunnel entrance gradually decreases from the entrance side to the back side. At the same time, the brightness of the tunnel entrance will automatically change according to the outdoor brightness. Moreover, unlike conventional step-by-step control by turning on / off high-pressure metal vapor discharge lamps, etc., the light intensity of the LED illuminator is dimmed according to the outdoor brightness, so stepless control is possible, and the driver tunnels. If you enter the tunnel, you will not feel any discomfort and can naturally adjust to the brightness in the tunnel. In addition, the amount of irradiation of the LED illuminator is controlled in a stepless manner to an optimum value corresponding to the outdoor brightness, so that there is no excessive amount of irradiation as in the conventional case, and the power consumption is greatly improved. Is possible.

  In the invention according to claim 2, a level selection panel and an electromagnetic switch are connected to the luminance meter, and a plurality of power supply lines are connected to the electromagnetic switch, and a plurality of LEDs are provided along each power supply line. Since the lighting fixtures are provided and these LED lighting fixtures are connected to the luminance meter via the controller, the LED lighting is controlled more finely by using the conventional lighting device. The irradiation amount of the tool can be controlled to an optimum value corresponding to the outdoor luminance.

It is the schematic for demonstrating outdoor brightness | luminance. It is a circuit diagram of the lighting fixture of this invention. It is the schematic which shows the connection image of the lighting fixture of this invention, and a controller. It is a graph which shows the relationship between the distance of a tunnel entrance part, and road surface brightness | luminance in this invention. It is the schematic which shows the connection image of the lighting fixture and controller of a prior art example. It is a graph which shows the relationship of the distance of a tunnel entrance part, and road surface brightness | luminance in a prior art example.

The present invention will be described below with reference to the drawings.
The present invention relates to a lighting device for a tunnel entrance that controls the illumination amount to be reduced from the brightness corresponding to the outdoor brightness on the entrance side to the brightness of the basic illumination on the back side of the tunnel in a section at a fixed distance from the tunnel entrance. It is.

As shown in FIG. 1, the outdoor brightness is within a circular visual field with a viewing angle of 20 degrees centered on the tunnel well 20a when the tunnel well 20a is seen from a point 150m before the entrance of the tunnel 20 and 1.5m above the ground. Means the average brightness.
Basic lighting is lighting that ensures the brightness required for drivers traveling in tunnels to see obstacles from a safe viewing distance. As a general rule, lighting fixtures are constant over the entire length of the tunnel. Place at intervals. The entrance illumination is illumination for mitigating rapid luminance changes that occur when the driver approaches the tunnel during the day and delays in adaptation of the eyes that occurs immediately after the entrance. The one with added lighting. In the tunnel design, brightness means road surface luminance (cd / m ² ).

In the present invention, a luminance meter is provided outside the tunnel, and a plurality of LED illuminators are provided in the tunnel entrance, and the luminance meter and the LED illuminator are connected via a controller and emitted from the controller. The illumination intensity of the LED illuminator is dimmed in a stepless manner by an output signal corresponding to the outdoor brightness.
FIG. 2 shows an example of a circuit diagram of the lighting tool. In the figure, 1 is an LED illuminator, 2 is a luminance meter set outdoors on the tunnel entrance side, and 3 is a controller installed between the LED illuminator 1 and the luminance meter 2. In addition, the power supply of this illuminating device uses the commercial power currently transmitted with the alternating voltage. Reference numeral 4 denotes a level selection board for controlling the basic illumination, and reference numeral 5 denotes an electromagnetic switch that opens and closes a power source in accordance with a control command from the level selection board 4 and is similar to the conventional one.

  The LED illuminator 1 is an illuminator composed of a light-emitting diode, and is made of a PN junction structure in which a P-type semiconductor and an N-type semiconductor are joined. In principle, the energy of electrons is converted into light energy. It emits light. The LED illuminators 1 are arranged so that the number gradually decreases from the tunnel entrance side to the back side. The luminance meter 2 is a general outdoor luminance meter that has been conventionally used.

In the present invention, the LED illuminator 1 and the luminance meter 2 are connected via the controller 3, and the irradiation amount of the LED illuminator 1 is steplessly determined by an output signal corresponding to the outdoor luminance emitted from the controller 3. It is characterized in that it is dimmed according to the formula.
That is, when the luminance signal measured by the luminance meter 2 is input to the controller 3, it is input to the LED dimming control device 3b through the signal conversion board 3a. This LED dimming control device 3b is programmed to output a control signal for optimizing the illumination amount of the LED lighting device 1 in accordance with the outdoor luminance, and the LED lighting device 1 in response to this signal. Is determined.
Further, unlike the conventional high-pressure metal vapor discharge lamp, the LED illuminator 1 changes the irradiation amount in a stepless manner according to the supplied power instead of the on / off control, so that the LED dimming control device 3b By controlling the power supplied according to the signal and adjusting the arrangement position, the number, etc. of the LED illuminators 1, the road surface brightness can be adjusted steplessly and freely within a range of 5 to 100%. . As a result, it is possible to adjust to an arbitrary optimum dose without irradiating uselessly bright illumination as in the past, and it is possible to achieve a significant reduction in power consumption, and also for lighting that is gentle to the driver. Become. Furthermore, even if the outdoor brightness changes frequently, there is no time lag and it is possible to immediately follow and make the optimum irradiation amount, so that highly safe illumination can be ensured.

  Thus, the illumination device of the present invention combines a luminance meter, an LED illuminator, and a controller, and adjusts the irradiation amount of the LED illuminator steplessly by an output signal corresponding to the outdoor luminance emitted from the controller. It is characterized in that the level selection panel and the electromagnetic switch are connected to the luminance meter, and a plurality of power supply lines are connected to the electromagnetic switch, and a plurality of power supply lines are connected along each power supply line. A single LED illuminator is provided, and these LED illuminators may be connected to a luminance meter via a controller.

  FIG. 3 is a schematic view showing a connection image of a lighting fixture and a controller when the present invention is applied to a conventional lighting device having four power supply lines. In the figure, ■ indicates the basic illumination 1a, and □ indicates the LED illuminator 1 for entrance illumination. This basic illumination 1a is always turned on, and a conventional fluorescent lamp is used.

The LED lighting device 1 is attached to each of the four power supply lines connected to the electromagnetic switch 5, and the number of attachments gradually decreases from the upper power supply line to the lower power supply line in the figure, And it is arranged in a pattern in which the number gradually decreases from the tunnel entrance side to the back side. About this arrangement | positioning pattern, it can design arbitrarily according to conditions, such as the length of a tunnel, height, a width | variety, inclination, and a bending condition.
The four power lines are, for example, level 1, level 2, level 3, and level 4 in order from the top. These power supply lines are connected to the level selection panel 4 and the electromagnetic switch 5, and according to the output signal from the luminance meter 2, all of the levels 1 to 4 are lit in the case of fine weather and the level in the case of bright cloudy weather Turn off 1 and turn on levels 2 to 4. Turn off levels 1 and 2 and turn on levels 3 and 4 when it is dark and cloudy. Turn off levels 1 to 3 and turn on only level 4 in case of rain and evening. Is controlled.

  Furthermore, all the LED lighting devices 1 of the levels 1 to 4 are connected to the controller 3 by four cables, with the LED lighting devices for each level as one group. The controller 3 receives the output signal from the luminance meter 2 and adjusts the arrangement position, the number, etc. of the LED illuminators 1 so that the road surface luminance is stepless and freely in the range of 5 to 100%. It is controlled so as to be dimmed. Therefore, in addition to the above-described four-level control of levels 1 to 4, the LED illuminator 1 is controlled by the stepless control by the controller 3, and fine control is performed. It becomes.

The relationship between the distance at the entrance of the tunnel and the road surface luminance in the lighting apparatus of the present invention having the above structure is shown in the graph of FIG. The first line (luminance 2400 cd / m ² ), the fifth line (luminance 1800 cd / m ² ), the ninth line (luminance 1200 cd / m ² ), and the 13th line (luminance 600 cd / m ² ) from the top of this graph. ² ) is a line corresponding to the levels 1 to 4 described above.
In the present invention, it is understood that finer control is performed because the amount of irradiation of the LED lighting device 1 is further finely controlled by the controller 3 by dividing the level into four equal parts. As a result, the irradiation amount of the LED illuminator can be controlled to an optimum value corresponding to the outdoor luminance, so that the excessive irradiation amount does not occur as in the conventional case, and the power consumption can be greatly improved. In addition, since the LED illuminator is used, there is no time lag even if the outdoor luminance changes frequently, and it is possible to follow immediately and to obtain the optimum irradiation amount.

  Although FIG. 3 illustrates the case where the four power lines of levels 1 to 4 are provided, the present invention is not limited to this, and it is needless to say that any number of power lines can be used. Moreover, although the case where the irradiation amount of the LED lighting device is controlled to be divided into four equal parts between the levels by the controller has been described, of course, it may be divided into smaller numbers, and finally Is preferably controlled steplessly.

(Comparative example)
FIG. 5 is a schematic diagram showing a connection image between a lighting fixture and a controller in a conventional example, and FIG. 6 is a graph showing the relationship between the distance of the tunnel entrance and the road surface luminance in this case. The numbers in the figure are the same as those in FIG. 3, but in the comparative example, a high-pressure metal vapor discharge lamp or a fluorescent lamp is used as the lighting tool.
In the comparative example, the irradiation amount is controlled only by selecting four power supply lines connected to the electromagnetic switch 5, so that it becomes rough control, and the amount of change in irradiation amount between control levels is large. It can be seen that the driver feels strange when the control level is switched. Moreover, since both the irradiation amount and the control are rough, the light may be lit in a state where the power consumption is considerably exceeded. Furthermore, it is difficult to quickly follow the lighting of the lamp for the on / off control of the lamp.

As described above, in the present invention, a luminance meter is provided outside the tunnel, and a plurality of LED lighting fixtures are provided in the tunnel entrance, and the luminance meter and the LED lighting fixture are connected via a controller. Because the LED illumination tool dose is dimmed in a stepless manner by the output signal corresponding to the outdoor brightness emitted from this controller, it is possible to finely set the optimum dose following the outdoor brightness. it can.
Further, in the case of a conventional high-pressure metal vapor discharge lamp or the like, if there is a sudden change in outdoor brightness, it cannot be turned on immediately, and it is difficult to make the brightness of the entrance illumination follow the outdoor brightness. Then, since the LED illumination tool is used, it is possible to respond immediately to a sudden change in outdoor brightness. In addition, since the LED illuminator can control the irradiation amount in a stepless manner, it is possible to reduce the use of unnecessary power by controlling the irradiation amount to an optimum amount. Furthermore, various effects such as an effect that the equipment cost can be reduced with a simple structure in which a controller is interposed, and an energy saving effect can be enhanced.

DESCRIPTION OF SYMBOLS 1 LED lighting tool 1a Basic illumination 2 Luminance meter 3 Controller 3a Signal conversion board 3b LED dimming control device 4 Level selection panel 5 Electromagnetic switch 20 Tunnel
21a Tunnel wellhead

Claims (2)

  Lighting at the entrance of the tunnel that can be dimmed so that the amount of light from the lighting fixture gradually decreases from the brightness corresponding to the outdoor brightness on the entrance side to the brightness of the basic illumination on the back side of the tunnel, at a certain distance from the tunnel entrance. A device is provided with a luminance meter outside the tunnel, and a plurality of LED illuminators are provided inside the tunnel entrance, and the luminance meter and the LED illuminator are connected via a controller. An illumination device for a tunnel entrance, wherein the irradiation amount of the LED illuminator is dimmed in a stepless manner by an output signal corresponding to the emitted outdoor luminance.   The luminance meter is connected to a level selection panel and an electromagnetic switch. A plurality of power supply lines are connected to the electromagnetic switch, and a plurality of LED illuminators are arranged along each power supply line. The lighting device for a tunnel entrance according to claim 1, wherein the LED lighting device is connected to a luminance meter via a controller.

Images