JP2014235827A - Illumination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make appropriate illumination in response to moving speed of a movable body.SOLUTION: In an illumination system, when a vehicle 3 runs in a low speed (lower than 20 km/h), only three of lightings 1 belonging to a group No. 1 turn on a light source 10 into full-lighting, and when the vehicle 3 runs in a high speed (20 km/h or higher), six lightings 1 belonging to each group No. 1 and 2 turn on the light source 10 into full-lighting. Thus, the faster vehicle 3 runs, the wider range the lightings light, so that a driver can drive in a safe illumination environment. According to a patent literature 1, a control signal needs to be sent six times separately in order to turn on six lightings 1. Contrary to the above, according to the present embodiment, the control signal sent twice can turn on the six lightings 1. That makes the lightings 1 hardly be delayed and thus appropriate illumination in response to moving speed of the movable body (speed of the vehicle 3).

Description

  The present invention relates to a lighting system.

  As a conventional lighting system, a lighting system for road lighting described in Patent Document 1 is exemplified. The lighting system described in Patent Literature 1 includes a plurality of lighting fixtures (road lights) installed along a road. Each luminaire includes a sensor that detects a moving body (for example, an automobile) that passes through a road, and a wireless communication unit that performs wireless communication using radio waves as a medium. And if the sensor of any lighting fixture detects a moving body, while the said lighting fixture will light its own light source, a detection signal will be wirelessly transmitted with respect to another lighting fixture from a wireless communication part. Other luminaires turn on their light sources when receiving a detection signal by the wireless communication unit. As a result, since any lighting fixture detects a moving body, and a plurality of lighting fixtures work together to turn on the light source, it is possible to ensure safety during movement of the moving body while avoiding unnecessary illumination. Energy saving can be achieved.

JP 2012-226993 A

  By the way, in the conventional example described in Patent Document 1, in a lighting fixture in which a moving body is detected by a sensor, a detection signal is wirelessly transmitted to an address of another lighting fixture. That is, in order to link a plurality of lighting fixtures, it is necessary to wirelessly transmit a detection signal to each lighting fixture individually. Therefore, when the moving speed of the moving body is relatively high, when another lighting fixture receives the detection signal, the moving body has already approached, and it may be difficult to secure sufficient illuminance.

  This invention is made | formed in view of the said subject, and aims at performing appropriate illumination according to the moving speed of a moving body.

  The illumination system of the present invention includes a plurality of illumination lamps installed along a road, and one or more speed measuring devices that measure the speed of a moving body that moves along the road. A light source for illuminating the road, a wireless communication unit that performs wireless communication using radio waves as a medium, a control unit that controls the light source and the wireless communication unit, and a memory that stores a plurality of group addresses for wireless communication The controller acquires the speed measurement value of the moving body from the speed measurement device, reads the group address corresponding to the speed measurement value from the storage unit, and transmits the read group address The control signal to be transmitted is transmitted wirelessly from the wireless communication unit, the wireless communication unit passes the control signal received by wireless communication to the control unit, and the control unit receives from the wireless communication unit. And controlling the light source when the group address of the control signal matches with any of the group address stored in the storage unit.

  In this illumination system, it is preferable that the control unit increases the number of group addresses as transmission destinations of the control signal as the speed measurement value acquired from the speed measurement device increases.

  In this lighting system, the control signal includes information on a lighting holding time for continuing to turn on the light source, and the control unit sets the lighting holding time as the speed measurement value acquired from the speed measuring device increases. It is preferable to shorten it.

  In this illumination system, it is preferable that the speed measuring device performs detection of the moving body and measurement of the speed of the moving body with the same sensor.

  In this illumination system, it is preferable that the number of the illumination lamps in which the same group address is stored in the storage unit decreases as the installation interval of the illumination lamps increases.

  In this lighting system, it is preferable that the number of the illuminating lamps in which the same group address is stored in the storage unit increases as the speed of the main moving body among the plurality of types of moving bodies increases.

  In this illumination system, the speed measuring device includes a plurality of the illumination lamps that store the same group address in the storage unit, and the speed measurement device includes the illumination lamps positioned at both ends along the moving direction of the moving body. It is preferable to install in the vicinity.

  In this illumination system, among the plurality of illumination lamps, the illumination lamp storing a plurality of group addresses in the storage unit is a group of the illumination lamps storing each group address in the storage unit It is preferable that it is located at the end along the moving direction of the moving body.

  In this illumination system, it is preferable that at least some of the illumination lamps include the speed measuring device.

  Since the lighting system of the present invention can reduce the number of transmissions of the control signal as compared with the conventional example, it is difficult to delay the lighting of the illumination lamp, and as a result, appropriate illumination can be performed according to the moving speed of the moving object. There is an effect that can be done.

It is a block diagram of the illuminating lamp in embodiment of the illumination system which concerns on this invention. It is a system block diagram same as the above.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an illumination system according to the present invention will be described in detail with reference to the drawings. In addition, the illumination system of this embodiment is for illuminating the road 4 on which a mobile body (mainly the motor vehicle 3) passes like the conventional example of patent document 1. FIG.

  As shown in FIG. 2, the illumination system of the present embodiment includes a plurality of (only four in the figure) illumination lamps (road lights) 1 installed at a predetermined interval L1 along the road 4, and an automobile 3 And a speed measuring device 2 that measures the speed of the motor.

  The speed measuring device 2 measures, for example, the speed of the automobile 3 traveling on the road 4 using a conventionally known radio wave type Doppler sensor, and the measured speed (speed measured value) is wired or wirelessly, and the adjacent illumination Transmit to lamp 1. If the speed measurement value is greater than zero, it can be determined that the automobile 3 is present. Therefore, the speed measurement device 2 in the present embodiment uses the same sensor for detecting the moving object and measuring the speed of the moving object ( Doppler sensor). However, since such a radio wave type Doppler sensor is conventionally well-known, detailed description of the configuration and operation will be omitted.

  The illuminating lamp 1 includes a light source 10, a power supply unit 11, an external interface (I / F) 12, a wireless communication unit 13, a control unit 14, a storage unit 15, and the like.

  The light source 10 is a light emitting diode. However, a discharge lamp other than the light emitting diode may be used as the light source 10.

  The power supply unit 11 converts AC power supplied from a commercial AC power source into DC power and supplies the light source 10 with power. Further, the power supply unit 11 can dimm and light the light source 10 by controlling the control unit 14 to increase or decrease the amount of power supplied to the light source 10. Note that such a power supply unit 11 is configured by, for example, a conventionally known AC / DC converter.

  The external I / F 12 performs wired or wireless data transmission with the speed measurement device 2 to acquire a speed measurement value, and passes the acquired speed measurement value to the control unit 14.

  The control unit 14 includes a microcontroller (hereinafter abbreviated as “microcomputer”) as a main component, and performs various processes to be described later by executing software stored in a built-in memory with the microcomputer.

  The wireless communication unit 13 performs wireless communication using radio waves as a medium, and encodes, modulates, and wirelessly transmits a transmission frame (control signal) passed from the control unit 14. Further, the wireless communication unit 13 receives a transmission frame wirelessly transmitted from the wireless communication unit 13 of the other lamp 1, and demodulates and decodes the received frame (reception frame) (original frame ( Control signal) to the control unit 14.

  The storage unit 15 includes an electrically rewritable nonvolatile semiconductor memory (for example, a flash memory), and stores an address necessary for wireless communication by the wireless communication unit 13. The address is input using input means such as a dip switch, and is written in the storage unit 15 by the control unit 14.

  Here, the address written in the storage unit 15 will be described in more detail. As in the conventional example described in Patent Document 1, the address stored in the storage unit 15 is usually unique to each illuminating lamp 1. On the other hand, in the present embodiment, not the address unique to each illuminating lamp 1 but an address (group address) assigned in common to the plurality of illuminating lamps 1 is stored in the storage unit 15.

  For example, numbers 1, 2, 3,... Are assigned to a plurality of illumination lamps 1 in order from the side closer to the speed measuring device 2. At this time, the first group address is assigned to the group to which the first three to three lamps 1 belong, and the second group address to the group to which the fourth to sixth three lamps 1 belong. Assigned. The first group address is stored in the storage unit 15 of the three lamps 1 to 3, and the second group address is stored in the storage unit 15 of the three lamps 1 to 6. Is memorized. As the number of illumination lamps 1 belonging to one group increases, the illumination range corresponding to the group becomes wider.

  If the group address of the control signal transmitted from the wireless communication unit 13 matches the group address stored in the storage unit 15, the control unit 14 of each illuminating lamp 1 responds to a command included in the control signal. The power supply unit 11 is controlled to turn on the light source 10 completely. Further, the control unit 14 starts counting the lighting holding time, and when the counting of the lighting holding time is completed, the control unit 14 controls the power source unit 11 to turn off the light source 10 or perform dimming lighting. Note that if the destination group address of the control signal passed from the wireless communication unit 13 does not match the group address stored in the storage unit 15, the control unit 14 does nothing and discards the control signal.

  Next, a specific operation of the present embodiment will be described. First, when the automobile 3 approaches the speed measuring device 2, the speed measuring device 2 measures the speed of the automobile 3 and transmits the measured speed value to the first lamp 1. In the first illumination lamp 1, the speed measurement value transmitted from the speed measurement device 2 is received by the external I / F 12 and passed to the control unit 14. The control unit 14 controls the power source unit 11 to turn on the light source 10 and starts counting the lighting holding time, and then stores the group address corresponding to the speed measurement value acquired from the speed measurement device 2 from the storage unit 15. read out. For example, the control unit 14 reads only the first group address when the speed measurement value is less than 20 km / h, and reads the first and second group addresses when the speed measurement value is 20 km / h or more. And the control part 14 of the 1st illuminating lamp 1 produces | generates the control signal which makes the read one or two group addresses a transmission destination, and makes the produced | generated control signal transmit by radio | wireless from the wireless communication part 13. FIG. However, when there are two read group addresses, the control unit 14 causes the wireless communication unit 13 to wirelessly transmit the control signal having each group address as a transmission destination in two steps.

  The control unit 14 of the second and third illumination lamps 1 is included in the control signal because the group address of the transmission destination of the control signal passed from the wireless communication unit 13 matches the group address stored in the storage unit 15. The power supply unit 11 is controlled according to the command to be turned on, and the light source 10 is fully turned on. Furthermore, the control part 14 of the 2nd and 3rd illuminating lamp 1 also starts the lighting holding time counting.

  Further, the control unit 14 of the 4th to 6th illuminating lamps 1 controls the control signal if the transmission destination group address of the control signal passed from the wireless communication unit 13 matches the group address stored in the storage unit 15. The power supply unit 11 is controlled in accordance with the command included in, and the light source 10 is fully lit. Furthermore, the control part 14 of the illuminating lamp 1 of No. 4 to No. 6 also starts counting the lighting holding time.

  That is, when the speed of the automobile 3 is slow (less than 20 km / h), only the three lighting lamps 1 belonging to the first group light all the light sources 10 and the speed of the automobile 3 is fast (more than 20 km / h) Six illumination lamps 1 belonging to each group of No. 1 and No. 2 turn on the light source 10 completely. Thereby, since the range illuminated simultaneously becomes wider as the speed of the automobile 3 is higher, a safe illumination environment can be provided to the driver of the automobile 3. And in the prior art example of patent document 1, in order to light the six illumination lamps 1, you have to transmit a control signal divided into 6 times. In contrast, in the present embodiment, the six illumination lamps 1 can be turned on by transmitting the control signal in two steps, and the lighting speed of the illumination lamps 1 is difficult to delay. Appropriate lighting can be performed according to the speed of the automobile 3. However, the speed threshold is not limited to 20 km / h.

  By the way, the faster the speed, the shorter the time for the automobile 3 to pass through the illumination range corresponding to one group address. Therefore, instead of increasing or decreasing the number of groups of the illuminating lamps 1 that are simultaneously turned on according to the speed of the automobile 3, the lighting holding time may be shortened as the speed measurement value increases.

  For example, when the speed measurement value is less than 20 km / h, the control unit 14 of the first lamp 1 sets the lighting holding time for the first group address to 2 minutes, and sets the lighting holding time for the second group address to 4 Generate a control signal in minutes. When the speed measurement value is 20 km / h or more, the control unit 14 of the first illuminating lamp 1 sets the lighting holding time for the first group address to 30 seconds, and sets the lighting holding time for the second group address to 60. Generate a control signal in seconds. The generated control signal is wirelessly transmitted from the wireless communication unit 13 and received by the lamps 1 of each group.

  Therefore, since the lighting holding time of the illumination lamp 1 belonging to each group becomes longer as the speed of the automobile 3 becomes slower, a safe lighting environment can be provided to the driver of the automobile 3.

  Here, as the installation interval L1 of the illuminating lamps 1 increases, it is preferable to decrease the number of illuminating lamps 1 in which the same group address is stored in the storage unit 15, that is, the number of illuminating lamps 1 belonging to the same group. In this way, the illumination range handled by one group can be equalized regardless of the installation interval L1 of the illumination lamps 1. As a result, it is possible to improve the safety by leveling the illuminance of the driver's field of view.

  Alternatively, it is preferable to increase the number of illuminating lamps 1 in which the same group address is stored in the storage unit 15 as the speed of the main moving body among the plurality of types of moving bodies increases. For example, when the main moving body is the automobile 3, the number of the lighting lamps 1 belonging to the same group may be increased as the legal speed of the road 4 on which the lighting lamp 1 is installed is higher.

  By the way, although the speed measuring device 2 may be installed not only at the entrance of the road 4 but also several units for each group, both ends along the traveling direction of the automobile 3 among the lighting lamps 1 belonging to the same group. It is preferable that it is installed only in the vicinity of the illuminating lamp 1 located in the position. That is, since the lighting lamps 1 belonging to the same group blink in conjunction with each other by wireless communication, if the speed measuring devices 2 are installed only at both ends of each group, the moving object moves while reducing the total number of the speed measuring devices 2 Appropriate lighting can be performed according to the speed (speed of the automobile 3).

  Of the plurality of illuminating lamps 1, the illuminating lamp 1 storing a plurality of group addresses in the storage unit 15 includes the group of the illuminating lamps 1 storing each group address in the storage unit 15. It is preferable to be located at the end along the moving direction. That is, if the illuminating lamps 1 positioned at the ends of the adjacent groups belong to the respective groups, it is possible to suppress the loss or interlocking of the interlocking operation between the two adjacent groups.

  In this embodiment, the illuminating lamp 1 and the speed measuring device 2 are configured separately, but at least a part of the illuminating lamp 1 may include the speed measuring device 2. Thus, if the illuminating lamp 1 is provided with the speed measuring device 2, there exists an advantage that the installation place of the speed measuring device 2 becomes unnecessary.

DESCRIPTION OF SYMBOLS 1 Illuminating light 2 Speed measuring device 3 Car (mobile body)
4 roads
10 Light source
13 Wireless communication unit
14 Control unit
15 Memory

Claims (9)

A plurality of illuminating lamps installed along the road, and one or a plurality of speed measuring devices for measuring the speed of the moving body moving along the road,
The illumination lamp includes a light source for illuminating the road, a wireless communication unit that performs wireless communication using radio waves as a medium, a control unit that controls the light source and the wireless communication unit, and a plurality of groups for wireless communication A storage unit for storing addresses,
The control unit acquires a speed measurement value of the moving body from the speed measurement device, reads the group address corresponding to the speed measurement value from the storage unit, and uses the read group address as a transmission destination Wirelessly transmitted from the wireless communication unit,
The wireless communication unit passes the control signal received by wireless communication to the control unit,
The control unit controls the light source when the group address of the control signal received from the wireless communication unit matches any of the group addresses stored in the storage unit. system.   The lighting system according to claim 1, wherein the control unit increases the number of the group addresses as transmission destinations of the control signal as the speed measurement value acquired from the speed measurement device increases.   The control signal includes information on a lighting holding time for continuously turning on the light source, and the control unit shortens the lighting holding time as the speed measurement value acquired from the speed measuring device increases. The illumination system according to claim 1 or 2.   The illumination system according to any one of claims 1 to 3, wherein the speed measuring device performs detection of the moving body and measurement of the speed of the moving body with the same sensor.   5. The illumination according to claim 1, wherein the number of the illumination lamps in which the same group address is stored in the storage unit decreases as the installation interval of the illumination lamps increases. system.   The number of the illuminating lamps in which the same group address is stored in the storage unit increases as the speed of the main mobile body among the plurality of types of mobile bodies increases. The lighting system according to any one of the above.   The speed measuring device is installed in the vicinity of the illuminating lamps located at both ends along the moving direction of the moving body among the plurality of illuminating lamps storing the same group address in the storage unit. The illumination system according to any one of claims 1 to 6, wherein   Among the plurality of illuminating lights, the illuminating lamp storing a plurality of the group addresses in the storage unit includes the moving body within the group of the illuminating lamps storing the group addresses in the storage unit. The illumination system according to claim 1, wherein the illumination system is located at an end along a moving direction of the lighting system.   The illumination system according to claim 1, wherein at least a part of the illumination lamps includes the speed measuring device.

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