JP2010198852A - Tunnel illumination control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for controlling dimming conditions at the time of practical use so as to get designated brightness in a tunnel concerning tunnel illumination wherein a light output is changed due to ambient temperature and wind velocity in the tunnel. <P>SOLUTION: Coldest-point temperature correlated with a light output from a lamp is measured by a temperature measurement section, and a relative value of the light output from the lamp to the temperature and temperature data of a memory section is calculated. Then, expected brightness is identified from a measured value of outdoor brightness or a timer, and a dimming level of a lighting fixture is controlled in consideration of the relative value of the light output. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tunnel lighting control system, and more particularly to control of a lighting fixture installed in a tunnel.

  The lighting of the basic part of the tunnel is operated according to the outdoor brightness and traffic volume. The brightness of the outdoors is measured using an illuminance sensor and a luminance sensor, and the brightness of the tunnel base is adjusted according to the measured value. In addition, since traffic volume fluctuations can be roughly predicted according to the time of day, adjustments are made according to the time schedule, and the lighting level is reduced during midnight hours when the traffic volume is low.

  For example, assuming that the lighting condition (daytime mode) of the lighting fixture at daytime is 100%, if the outdoor field becomes darker than a specific brightness, the light is dimmed to 50% of the nighttime mode. Control is performed so that the midnight mode is selected and dimming is performed to 25% of the daytime mode. Fig. 9 shows an operation example when using a lighting fixture for two fluorescent lamps (using a 50% dimming ballast). One lamp is turned off in the night mode, and one lamp is dimmed by 50% in the midnight mode. The desired brightness in each mode is ensured.

  Conventionally, as a light source of this type of lighting apparatus, many use an HID lamp or a low-pressure sodium lamp, but in recent years, a discharge lamp such as a fluorescent lamp has begun to be used as a tunnel illumination. This is the result of the practical use of compact and large-capacity fluorescent lamps such as Hf fluorescent lamps that are already widely used in offices and stores as a light source for tunnel lighting. It is estimated that it will increase.

  By the way, when a fluorescent lamp is used as a light source of a luminaire used for a tunnel basic part for illumination in the tunnel, the light source has a characteristic that the light output changes depending on the ambient temperature. FIG. 10 shows an example of this, showing the relative value of the light output with respect to the ambient temperature when the light output at an ambient temperature of 15 ° C. is 100%, and the light output when the ambient temperature is approximately −10 ° C. or lower or 15 ° C. or higher. Is 100% or less. Therefore, when using a fluorescent lamp tunnel lighting fixture in an area where the ambient temperature is extremely low, control is performed according to the season as shown in FIG. 4 so as to ensure the desired brightness even at −30 degrees. It is conceivable to operate by changing the method (control by calendar). In the midnight mode, 50% lighting by turning off one lamp is possible, but considering the case where relighting is difficult at low temperatures, the two lamps are turned on in the dimming mode. Yes.

However, there are cases where the temperature is relatively high even in winter and the desired brightness can be secured even in summer operation, and power consumption loss may occur in the control method using a calendar.
In addition, a method for measuring the light output from the light source with the illuminance sensor from the back side of the reflector and controlling the light output to be constant has been developed. May not work.

  On the other hand, in Patent Document 1, as shown in a schematic diagram of the lighting control system in FIG. 11, the temperature outside (or inside) the tunnel is measured, and the measurement result is taken into consideration, which is necessary when operating basic lighting. There has been proposed a system for controlling the basic lighting of the tunnel so as to ensure the brightness of the road surface. In the illumination control system of Patent Document 1, when the outside air temperature sensor 1 is provided outside the tunnel and the temperature detected by the outside air temperature sensor becomes lower than a predetermined temperature, the brightness rank is one higher than the determined brightness rank. Further, by controlling the fluorescent lamp 6 by the control unit 5, even if the ambient temperature is lowered and the light output of the fluorescent lamp 6 is reduced, the reduction of the brightness in the tunnel can be alleviated. Reference numeral 3 denotes a luminance sensor.

JP-A-2005-19125

However, when there is wind in the tunnel, depending on the wind speed, the temperature in the lighting fixture is lower than that in the no-wind state, so the light output may be further reduced. In such a case, in the illumination control system of Patent Document 1, when the temperature detected by the outside air temperature sensor becomes lower than a predetermined temperature, the brightness rank is set to one higher than the determined brightness rank. As a result, even if the ambient temperature is lowered and the light output of the fluorescent lamp is lowered, the desired brightness of the road surface may not be ensured.
In this way, the light output of fluorescent lamps changes depending on the ambient temperature, and the lamps are arranged so as to satisfy the required brightness within a certain ambient temperature range, so that the required brightness is exceeded depending on the ambient temperature. As a result, wasteful power consumption occurs. For this reason, in order to suppress unnecessary power consumption, a conventional tunnel lamp equipped with an illuminance sensor and performing dimming control so that the light output of the lamp is constant regardless of the ambient temperature is commercialized. Has been. However, since the ambient temperature at which the illuminance sensor can operate is limited, there is a problem that it cannot be used in an area where the ambient temperature is greatly reduced.
The present invention has been made in view of the above circumstances, and the dimming state at the time of operation so as to obtain the desired brightness in the tunnel with respect to the tunnel illumination whose light output changes depending on the ambient temperature or the wind speed in the tunnel. An object of the present invention is to provide a system for controlling the system.

  Therefore, in the tunnel lighting control system of the present invention, the coldest spot temperature correlated with the light output from the lamp is measured by the temperature measurement unit, and the relative value of the light output from the lamp with respect to the temperature and the temperature data of the storage unit is obtained. . Next, the desired brightness is specified from the measured value of outdoor brightness or a timer, and the dimming level of the luminaire is controlled in consideration of the relative value of the light output described above.

That is, according to the present invention, there is provided a tunnel lighting control system for controlling the output of a lighting device for a tunnel having a discharge lamp disposed in the tunnel, wherein the temperature of the coldest spot of the discharge lamp is set in the tunnel. A temperature measuring means for measuring, and a light output measuring section for measuring the light output of the discharge lamp, and calculating a relative value between the measurement result of the temperature measuring means and the light output, and based on the relative value The discharge lamp lighting control is performed.
With this configuration, the coldest spot temperature is detected, and the discharge lamp lighting control is performed based on the relative value between the coldest spot temperature and the light output, so the effects of wind and seasonal variations are reflected, High-precision lighting control can be realized. As the illuminance sensor becomes inoperable, high-precision control is possible even in an area where the ambient temperature greatly decreases.

According to the present invention, in the tunnel lighting control system, as the temperature measuring unit, a temperature measuring unit that measures the temperature in the tunnel, a storage unit that stores output information of the temperature measuring unit, and a temperature measuring unit A calculation unit that compares the output and the data stored in the storage unit, calculates a coldest spot temperature and a light output ratio, and a control unit that performs lighting control of the discharge lamp based on the output of the calculation unit; Including
In addition, by adding a brightness measurement unit that measures the outdoor brightness and performing lighting control in consideration of the outdoor brightness, an environment in which the driver can easily drive can be created. In other words, for tunnel lighting, the inside of the tunnel can be brightened when the outside of the tunnel is sunny and bright, and the inside of the tunnel can be darkened when the outside of the tunnel is dark, such as late at night, so that the driver can drive as much as possible. There is an effect.

In the tunnel illumination control system according to the present invention, the discharge lamp is disposed substantially parallel to a longitudinal direction of the tunnel, and a low-pressure side of a lamp output line in the discharge lamp lighting circuit is disposed on the entrance side of the tunnel. In addition, the temperature measuring means is arranged on the entrance side of the tunnel, and measures temperature at the coldest spot at the end of the discharge lamp on the tunnel entrance side.
With this configuration, the temperature at the end of the lamp on the entrance side tends to be lower than the inside of the tunnel, so the low pressure side of the lamp output line of the lighting circuit of the discharge lamp is arranged on the entrance side of the tunnel, and the temperature measurement By arranging the means on the entrance side of the tunnel, only the temperature on the entrance side can be measured and the light output can be estimated.

The present invention further includes a time measuring unit for measuring the cumulative lighting time in the tunnel lighting control system, and measures the light output of the discharge lamp in consideration of the relationship between the cumulative lighting time and the light output of the discharge lamp. Includes corrections from temperature results.
With this configuration, it is possible to realize more accurate lighting control by correcting the attenuation of the light output due to the cumulative lighting time.

The present invention includes the above-described tunnel illumination control system, wherein the discharge lamp is a fluorescent lamp or an electrodeless fluorescent lamp.
Fluorescent lamps or electrodeless fluorescent lamps have a problem that it is difficult to obtain an output sufficient for reliably emitting light from a phosphor, particularly at low temperatures, and sufficient light emission characteristics cannot be obtained. The coldest spot temperature is generally generated on the low pressure side of the lamp output line in the lighting circuit. However, since it varies depending on the form of the fixture, in the case of a straight tube type fluorescent lamp, the coldest spot temperature at both ends. Is measured, and the lower temperature is controlled as the coldest spot temperature. In the case of an electrodeless fluorescent lamp, the light output ratio can be estimated by measuring the temperature of the amalgam portion in the same manner as in a straight tube fluorescent lamp.
Here, the coldest spot temperature sensor does not use a special temperature sensor, but refers to a temperature sensor arranged at a position where the coldest spot temperature can be detected.

  As described above, according to the present invention, the tunnel includes temperature measuring means for measuring the temperature of the coldest spot of the discharge lamp, and a light output measuring unit for measuring the light output of the discharge lamp. , Calculating the relative value between the measurement result of the temperature measuring means and the light output, and based on this relative value, so as to control the lighting of the discharge lamp, reflect the influence of wind and seasonal variations, High-precision lighting control can be realized.

The block diagram which shows the system configuration | structure of the tunnel lighting control system of Embodiment 1 of this invention. Schematic diagram of the system configuration of the tunnel lighting control system according to the first embodiment of the present invention. The figure which shows the relationship between the cold spot temperature of a lighting fixture (fluorescent lamp), and the relative value of light output The figure which shows the light control level in Embodiment 1 of this invention Schematic diagram showing the system configuration of the tunnel lighting control system according to the second embodiment of the present invention. The figure which shows ratio of the coldest spot temperature of the tunnel inside side with respect to the tunnel entrance side of the system of the tunnel lighting control system of Embodiment 2 of this invention The figure which shows the relationship between the lighting time and lamp output in the tunnel lighting control system of Embodiment 3 of this invention. The block diagram of the system configuration | structure of the tunnel illumination control system of Embodiment 3 of this invention. Diagram showing dimming level Diagram showing the relationship between ambient temperature and output ratio Schematic diagram showing the system configuration of a conventional tunnel lighting control system

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
A block diagram showing a system configuration of the tunnel lighting control system according to the first embodiment of the present invention and a schematic diagram of the system configuration are shown in FIGS.
This tunnel illumination control system includes a temperature measurement unit 100 that measures the coldest spot temperature in the tunnel T, a storage unit 200 that stores output information of the temperature measurement unit 100, and a brightness measurement that measures outdoor brightness. Unit 300 and an arithmetic unit 500 that compares the output of the temperature measurement unit 100 with the data stored in the storage unit 200 and calculates the coldest spot temperature and the light output ratio for each time synchronized by the timer 400. The control unit 700 that controls the lighting of the lighting fixture 600 based on the output of the calculation unit 500 is provided to control the dimming level of the lighting fixture.

Here, the temperature measuring unit 100 is configured to measure the coldest spot temperature correlated with the light output from the plurality of fluorescent lamps constituting the luminaire 600, so that the outside of the fluorescent lamp 601 located closest to the entrance / exit of the tunnel is measured. The coldest point temperature sensor 101 provided near the end is provided.
The calculation unit 500 measures the coldest spot temperature correlated with the light output from the fluorescent lamp obtained by the temperature measurement unit 100, and the light from the fluorescent lamp 601 with respect to the temperature and the temperature data of the storage unit. Calculate the relative value of the output. Next, the calculation unit 500 specifies the desired brightness from the outdoor brightness measurement value by the brightness measurement unit 300 or the timer 400, and considers the relative value of the light output described above, and the lighting fixture. A dimming level of 600 is calculated. And according to the light control level obtained by this calculating part 500, the control part 700 controls the lighting fixture 600. FIG.

  The brightness measuring unit 300 includes a luminance sensor 301, and the temperature measuring unit 100 includes a coldest spot temperature sensor 101 that measures the coldest spot temperature.

  FIG. 3 is a diagram showing the relationship between the coldest spot temperature of the lighting fixture (fluorescent lamp) 600 and the relative value of the light output. From this relationship, by measuring the coldest spot temperature with the coldest spot temperature sensor 101, the calculation unit 500 calculates based on the coldest spot temperature, and calculates the relative value of the light output from the lighting fixture 600. Can do. Therefore, as the coldest spot temperature sensor 101, a thermocouple capable of measuring temperature even at a low temperature is bonded to the end of the fluorescent lamp 601 constituting the lighting fixture 600 that generates the coldest spot temperature. The coldest spot temperature obtained by the coldest spot temperature sensor 101 is fed back to the calculation unit 500, and the dimming level shown in FIG. 4 is set to summer operation based on outdoor brightness data and timer data. Set whether to use in winter.

  Here, the schematic diagram of FIG. 2 shows an example of a straight tube type fluorescent lamp, and the coldest spot temperature is generally generated on the low-pressure circuit side of the lamp output line, but it varies depending on the form of the appliance. Therefore, the coldest spot temperature at both ends is measured, and the lower temperature is controlled as the coldest spot temperature. In the case of an electrodeless fluorescent lamp, the light output ratio can be estimated by measuring the temperature of the amalgam portion as in the case of the straight tube fluorescent lamp.

  This tunnel illumination control system includes a plurality of lighting fixtures 600 having fluorescent lamps for illuminating the inside of the tunnel, a luminance sensor 301 for detecting the luminance near the entrance / exit of the tunnel, the luminance detected by the luminance sensor 301, and a temperature measuring unit. 100 coldest spot temperature sensors 101, a control unit 700 that controls the number of lighting fixtures 500 to be turned on in accordance with the dimming level calculated by the calculation unit 500, and a fluorescent lamp temperature near the entrance of the tunnel. And a cold spot temperature sensor 101.

  The lighting fixtures 600 are attached to the ceiling in the tunnel at a substantially equal pitch, and fluorescent lamps 601 are housed therein. The fluorescent lamp 601 is a small and high output lamp such as an Hf lamp.

  The luminance sensor 301 detects the luminance at the entrance / exit of the tunnel. Although the luminance is measured here, the illuminance may be measured by an illuminometer. Moreover, you may measure the illumination intensity and brightness | luminance of the location a little away from the entrance / exit of the tunnel.

  The control unit 700 discriminates the first to third luminance ranks in two stages in summer and winter according to the luminance detected by the luminance sensor 301 in a stepwise manner, and according to the determined luminance rank. Thus, the number of lighting fixtures 600 can be controlled to any number from the lowest number corresponding to the third luminance rank to the highest number corresponding to the first luminance rank. Further, when the outside air temperature sensor is provided, when the temperature detected by the outside air temperature sensor is lower than the predetermined temperature Y, the control unit 700 uses the determined brightness rank (X (1 ≦ X <N)). Alternatively, the number of lighting of the fluorescent lamps 601 constituting the lighting fixture 600 may be controlled so that the number of lighting corresponding to one higher luminance rank (X + 1) is obtained.

  The tunnel illumination control system configured as described above calculates the relative value of the light output from the output of the coldest spot temperature sensor 101, and the outside of the tunnel is in clear sky according to this value and the brightness detected by the brightness sensor 301. Is determined to be the first brightness rank A1 in the daytime in the summer, for example, based on the output of the coldest spot temperature sensor 101 in consideration of the determined result. If this is the case, all 600 lighting fixtures are turned on, and if it is determined that the second brightness rank A2 is night, 50% of the lighting fixtures are turned on.

This operation will be described in detail. First, the coldest spot temperature sensor 101 detects the coldest spot temperature in the vicinity of the fluorescent lamp 601 at the entrance of the tunnel, and the brightness sensor 301 detects the brightness near the entrance and exit of the tunnel. Based on the result, the calculation unit 500 controls the lighting of the lighting fixture 600 via the control unit 700. The control unit 700 determines which of the first to third luminance ranks the detected luminance corresponds to. Here, each brightness rank is based on summer in accordance with the brightness of the tunnel, and the first brightness rank A1 for daytime, the second brightness rank A2 for nighttime, and the third brightness for midnight. Is set to have a luminance rank A3. Further, since it is dark in the winter season, the brightness rank is increased by one rank than in the summer season, the first high brightness rank S1 that is one rank higher than the first brightness rank As in the daytime, and the second in the nighttime. Is set to be the third brightness rank S3 at midnight.
Then, the control unit 700 considers the relative value of the light output corresponding to the coldest spot temperature, and determines the third number from the lowest lighting number corresponding to the first high luminance rank (daytime) according to the luminance rank corresponding thereto. The number of lighting of the fluorescent lamps 601 constituting the lighting fixture 600 is controlled to any number up to the maximum number of lighting corresponding to the brightness rank.

  Here, in the case of the first luminance rank (daytime), the control unit 700 turns on the 100% fluorescent lamp 601 (minimum number of lights). In the case of the second luminance rank (nighttime), the control unit 700 turns on the 50% fluorescent lamp 601. In the case of the third luminance rank (midnight), the control unit 700 turns on the 25% fluorescent lamp 601.

  By operating the tunnel lighting control system in this way, it is possible to suppress a decrease in luminance due to a decrease in the external temperature or a decrease in the temperature of the fluorescent lamp due to the wind, and to obtain highly reliable high luminance. It becomes. The brightness of the outside of the tunnel and the inside of the tunnel change in the same way, making it easier for the driver to drive.

  By the way, a reference luminance P of the road surface is determined for the tunnel, and it may be necessary to ensure this. For example, when this is determined in the tunnel described in FIG. 1, the reference brightness P of the road surface is determined according to each brightness rank (daytime, nighttime, and midnight (summer and winter respectively). Usually, the coldest spot temperature is measured, and the reference brightness P can be obtained within the defined temperature range even if the ambient temperature is lowered and the light output of the fluorescent lamp is lowered according to this temperature. The number of lighting fixtures is set in the inside of the tunnel as appropriate. In other words, even if the coldest point temperature point is lowered, it does not fall below the reference luminance P of the road surface as long as it is within the determined temperature range.

  Furthermore, the lighting fixture 600 is arranged so that the reference luminance P of the road surface in the tunnel can be secured within a predetermined temperature range when the lighting unit 600 is lit with the number of lightings corresponding to the luminance rank determined by the control unit 700. By setting the predetermined temperature Y to a temperature not more than a predetermined temperature range, the reference luminance P of the road surface can be secured in a wide temperature range, and at an ambient temperature where the light output does not decrease, such as 25 ° C. It is possible to reduce the road surface from becoming unnecessarily bright and to effectively use energy.

  As described above, according to the configuration of the first embodiment, the tunnel lighting fixture using the fluorescent lamp is affected not only by the ambient temperature but also by the wind that has the effect of lowering the temperature of the lighting fixture. By setting the dimming level at the time of operation according to the coldest spot temperature of the lamp that correlates with the light output of the lamp, compared with the tunnel illumination control system disclosed in Patent Document 1, Brightness can be controlled. In addition, it is possible to reduce power consumption loss as compared with a control method using a calendar.

(Embodiment 2)
Next, a tunnel lighting control system according to the second embodiment of the present invention will be described.
The first embodiment is an example in which a straight tube fluorescent lamp is used as a lighting fixture for a tunnel, and a case of a tunnel used for normal traffic has been described, but in this embodiment, a one-way traffic is described. The lighting control in the case of a tunnel will be described.

  As shown in the schematic diagram of the system configuration of the tunnel illumination control system according to the second embodiment of the present invention in FIG. 5, in the one-way tunnel, the wind in the tunnel is the same as the traveling direction of the vehicle due to the piston effect by the traveling vehicle. Since it occurs in F, the temperature of the lighting fixture 600 for tunneling decreases on the tunnel entrance side. Therefore, in the present embodiment, the coldest spot temperature sensor 101 of the temperature measuring unit 100 is provided, and the coldest spot temperature sensor 101 is provided at the outer end of the straight tube fluorescent lamp near the tunnel entrance. FIG. 6 shows the ratio of the temperature at the end of the lamp on the entrance side and the inside of the tunnel in a tunnel luminaire using a straight fluorescent lamp installed near the tunnel entrance side wellhead. Since the temperature at the lamp end on the entrance side tends to be lower than the inside of the tunnel, placing the lamp output low-pressure circuit side at the lamp end as shown in FIG. It arranges so that it may become cold spot temperature, measures only the temperature of an entrance side, and presumes light output.

  As described above, in the case of a straight tube fluorescent lamp, the coldest spot temperature is generated at either end of the lamp, but in the case of a one-way tunnel, the coldest spot temperature is generated at the end of the tunnel entrance side. Since the measurement site can be specified, the number of temperature sensors can be reduced.

(Embodiment 3)
Next, a tunnel lighting control system according to Embodiment 3 of the present invention will be described.
In tunnel lighting design, the number of lighting fixtures is planned in consideration of the decrease in light output due to the aging of lamps. In other words, in the case of a straight tube fluorescent lamp, the light output ratio at the end of the life is about 80% of the initial stage, so that the initial brightness can be secured even at the end of the life of the lamp. 0.8) is installed. Therefore, as shown in FIG. 7, a loss of power consumption occurs until the end of the lamp life.

  Therefore, the light output ratio data with respect to the lighting time as shown in FIG. 7 is stored in the storage unit in advance, and the light control level is set in consideration of the light output ratio due to the influence of the ambient temperature and the wind. FIG. 8 shows a block diagram of the system configuration. In this example, in addition to the first storage unit indicating the relationship between the coldest spot temperature stored in the storage unit 200 of Embodiment 1 and the ratio of light output, the relationship between the lamp lighting time and the light output ratio is The second storage unit 201 shown is provided. The second storage unit 201 corrects the dimming level in consideration of the aged data of the light output.

  According to the above configuration, the power consumption can be reduced as compared with the first and second embodiments by setting the dimming level based on the aged data of the light output of the fluorescent lamp.

DESCRIPTION OF SYMBOLS 1 Outside temperature sensor 3 Luminance sensor 5 Control part 6 Fluorescent lamp 100 Temperature measurement part 101 Coldest point temperature sensor 200 Memory | storage part 300 Brightness measurement part 301 Luminance sensor 400 Timer 500 Calculation part 600 Lighting fixture 700 Control part

Claims (5)

A tunnel lighting control system for controlling the output of a lighting device for a tunnel having a discharge lamp disposed in the tunnel,
In the tunnel, temperature measuring means for measuring the temperature of the coldest spot of the discharge lamp,
A light output measuring unit for measuring the light output of the discharge lamp;
Equipped,
A tunnel illumination control system that calculates a relative value between a measurement result of the temperature measuring means and a light output, and performs lighting control of the discharge lamp based on the relative value. The tunnel lighting control system according to claim 1,
As the temperature measuring means, a temperature measuring unit for measuring the temperature in the tunnel,
A storage unit for storing output information of the temperature measurement unit;
An operation unit that compares the output of the temperature measurement unit and the data stored in the storage unit, and calculates the coldest spot temperature and the light output ratio;
A tunnel illumination control system comprising: a control unit that performs lighting control of the discharge lamp based on an output of the calculation unit. The tunnel lighting control system according to claim 1 or 2,
The discharge lamp is arranged substantially parallel to the longitudinal direction of the tunnel, and the low pressure side of the lamp output line in the lighting circuit of the discharge lamp is arranged on the entrance side of the tunnel,
The temperature measuring means is disposed on the entrance side of the tunnel;
A tunnel illumination control system for measuring temperature at the coldest spot at the end of the discharge lamp on the tunnel entrance side. The tunnel lighting control system according to any one of claims 1 to 3,
A tunnel illumination control system that has time measuring means for measuring the cumulative lighting time and corrects the light output of the discharge lamp from the temperature measurement result in consideration of the relationship between the cumulative lighting time and the light output of the discharge lamp. The tunnel lighting control system according to any one of claims 1 to 4,
The discharge lamp is a tunnel lighting control system which is a fluorescent lamp or an electrodeless fluorescent lamp.

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