JP2005100764A - Road lamp monitoring device and monitoring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a road lamp monitoring device and a monitoring method wherein monitoring work can be carried out by a daytime travelling vehicle without taking a long time of communication while avoiding an interference of communication. <P>SOLUTION: This road lamp monitoring device comprises a road lamp additional device that has a state detection means for detecting the state of the road lamps A-D, a-d and a transmission circuit that transmits road lamp state information detected by the state detection means and road lamp installation-location information as road lamp information, and in which the road lamp additional devices are installed to a plurality of road lamp poles or in vicinities of them. The transmission circuit transmits the road lamp information to a communication device installed in the travelling vehicle 4 for collecting the road lamp information, and the road lamp additional device receives a transmission signal which the adjoining road lamp additional devices transmit to the communication device and determines its own transmission timing to the communication device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a road light monitoring device that monitors, for example, lighting / non-lighting of a road lamp installed on a general road, an expressway, etc., and collects lighting / non-pointing information based on the monitoring by using transmission means and reception means, and It relates to a monitoring method.

  Conventionally, the following method has been adopted in order to monitor the inconvenience of road lights installed on ordinary roads and highways over several tens of kilometers. The first method is a method in which a traveling worker visually confirms when a road light is turned on at night, or a method in which a display device such as an LED is visually confirmed by receiving a signal from a detection circuit when the road light is unsuccessful. (See Patent Document 1). The second method is a method of transmitting abnormality information to a central management device using a dedicated signal line such as an optical fiber (see Patent Document 2).

  In the case of the first method, there are concerns about the burden on workers who work at night, reliability problems due to burdens and oversights on workers, and the impact on traffic due to speed restrictions when traveling around by car. The In the case of the second method, since it is necessary to provide a dedicated signal line from each road light to the management device, a lot of labor and cost are generated.

  Therefore, Patent Documents 3 to 6 as inventions using wireless communication in order to minimize the burden on the workers and the burden on the equipment added for collecting information when checking a large number of road light illuminators. Has been proposed.

Patent Documents 3 and 4 are road light astigmatism monitoring devices using infrared rays, and are systems in which a traveling work vehicle collects astigmatism information from a road light addition device wirelessly. In both cases, it is possible to easily detect the failure of road lights, abnormalities of ballasts, etc., and the inspection work can be carried out while riding on a moving vehicle, so that the time required for the work is greatly reduced and the maintenance cost is reduced. Reduction can be achieved.
Japanese Patent Laid-Open No. 5-211096 Japanese Patent Laid-Open No. 08-160090 JP 05-89972 A JP2000-lO6286 JP2002-324686 JP2001-052882

  However, these patents still have problems to be solved. That is, since it is necessary to communicate one after another within the limited communication area with the road lights attached at regular intervals in Patent Documents 3 and 4, the communication becomes very frustrating. In addition, when trying to perform retransmission processing in order to improve reliability, there arises a problem that sufficient communication time cannot be secured.

  Furthermore, in order to simplify the communication method, a specific low-power radio is used to make inquiries about unconfirmed information requests from a patrol car to multiple road lights at once, and then collect information sequentially. There is also a method of performing an information communication system, but since the signal to be handled needs to use multiple road lights as a counterpart to a patrol car that is a receiving circuit, if the same frequency is used, interference will occur. Means for avoiding it are necessary, and the means itself becomes troublesome.

  Therefore, there is a method of using individual frequencies for each road light in order to easily avoid interference (see Patent Document 6), but at least the road lights included in the communication range of the patrol car can handle individual frequencies. Since it is necessary to provide a communication device, the introduction of facilities becomes complicated, and a patrol car requires a separate communication device that can handle a plurality of frequencies. On the other hand, when trying to avoid interference at a single frequency, it is necessary for the traveling car to specify the address assigned to each road light for each communication and to transmit a request signal, so the communication time becomes longer. There is a possibility that the collection work while running will not be realized.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a road light monitoring device and a monitoring method capable of performing monitoring work by a daytime patrol car while avoiding interference and without increasing communication time.

A road light monitoring device according to the present invention includes a state detection unit that detects a state of a road light, and a transmission circuit that transmits road light state information and road light installation location information detected by the state detection unit as road light information. A road light monitoring device having the road light addition device provided and installed the road light addition device on a plurality of road light columns or in the vicinity thereof,
The transmission circuit transmits the road light information to a communication device provided in a patrol car that collects the road light information.
The road light adding device receives a transmission signal transmitted from an adjacent road light adding device to the communication device, and determines its own transmission timing to the communication device.

  In the above-described configuration, the transmission timing is such that a transmission signal of the adjacent road light adding device is received, a request signal of road light information from the patrol car is received, and its own transmission signal is transmitted.

  The said structure WHEREIN: Another frequency is used for the transmission frequency of the said transmission circuit of the road light monitoring apparatus contained in the communication range of the said patrol car individually.

  In the above configuration, when a transmission signal from an adjacent road light adding device to the patrol vehicle cannot be received in response to a request signal for road light information from the patrol vehicle to the road light adding device, Send.

  In the above configuration, when a transmission signal from the adjacent road light adding device cannot be received in response to a request signal for road light information from the patrol vehicle to the adjacent road light adding device, the adjacent road light adding device The transmission signal from the road light adding device adjacent to is received, and its own transmission signal is transmitted.

The road light monitoring method of the present invention uses a road light monitoring device installed in or near a plurality of road light columns to detect the state of the road light, and to detect the detected road light state information and the road light installation location information. A road light monitoring method for transmitting to a communication device provided in a patrol car as road light information,
The road light adding device receives a transmission signal transmitted from an adjacent road light adding device to the communication device, and determines its own transmission timing to the communication device.

  In the above-described configuration, the transmission timing is such that a transmission signal of the adjacent road light adding device is received, a request signal of road light information from the patrol car is received, and its own transmission signal is transmitted.

  According to the present invention, the frequency handled by the communication device is single, and while avoiding crosstalk with a simple configuration, the road lights are spotlessly monitored during daytime patrols without increasing the communication time. I can do things. In addition, according to the present invention, it is possible to perform a spot monitoring job while confirming a failure of a nearby road light.

  When the transmission signal from the adjacent road light addition device to the patrol car cannot be received, send the transmission signal of itself, or receive the transmission signal from the road light addition device adjacent to the adjacent road light addition device, By transmitting its own transmission signal, it is possible to collect addresses of failed road lights together.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a system configuration diagram of a road light monitoring device using a patrol car. A plurality of road lamp columns 2 are installed along the road 1. A road light adding device 3 is installed at or near each road light column 2. This road light adding device 3 is composed of a communication unit having a transmission circuit, a power source unit, an astigmatism signal detection means that is a state detection means, a control / processing unit, a memory (not shown), and the like. The detected point / unspotted road lamp state and road lamp installation location information (address) are transmitted from the communication unit to the patrol car 4. The in-vehicle device 8 of the patrol car 4 traveling on the road 1 includes a communication device, which includes a communication device, a power supply device, a processing device, a storage device including a recording medium such as a memory card, and the like. The road light information from the road light adding device 3, that is, the information on the incongruity and the position is received and stored in the storage device. The contents of the storage device are read from a recording medium or the like by a reading device at a road management office or the like and processed by a processing unit.

  FIG. 2 shows state detection means for detecting the state of the road light. FIG. 2A shows a lighting circuit, in which a voltage is applied to the road lamp 6 to light the road lamp 6. The state detection means monitors the input current or the lamp current with the current transformer 5, and when the lamp is out, no current flows, so this is detected by the current detection circuit, and it is determined that the lamp is out and used as inconspicuous information. Is transmitted to the patrol car 4 by the section. FIG. 2 (b) shows a photometric detection method, in which an optical sensor 7 is arranged in the vicinity of the road lamp 6, and when the direct light is monitored and the illumination becomes below a certain illuminance at night, the optical sensor 7 is regarded as a lamp burnout. These detection signals are used. As other state detection means, there are cases where a point / inconsistency is detected based on the presence / absence of power consumption, or whether there is an abnormality in the stabilizer temperature.

  FIG. 3 shows an independent power supply circuit for securing a daytime power supply. Secondary batteries such as nickel metal hydride batteries, nickel-cadmium batteries and lead storage batteries, and backup power supplies using large capacity capacitors such as electric double layer capacitors are used in combination with solar batteries. FIG. 3 (a) uses a lead storage battery 10 and a solar battery 9 in combination, and FIG. 3 (b) shows a power supply circuit 12 comprising a charging circuit, a booster circuit and an electric double layer capacitor. 11 is a distribution board for supplying power to the road light, and 13 is a communication device. The communication device and the communication circuit use, for example, a specific low power radio of 429 MHz of RF radio.

The road lamp state information detected by any one of the above-described state detection means is stored in the road lamp adding device 3 together with the road lamp installation location information. In the daytime patrol patrol, when the road light adding device 3 receives a request signal for requesting the road light state information from the patrol car 4, it is returned by using the communication circuit provided in the road light adding device 3. Do the point information collection business.
The patrol patrol is a patrol performed by, for example, a public institution for the purpose of maintenance and safety management of roads and related facilities. Reply information.

  A specific communication method according to this embodiment will be described with reference to FIGS. As a precondition, each road light A to D, a to d stores in advance the address of the road light adjacent to itself (immediately next to itself in the direction toward the traveling car 4), Road lights A to D and a to d are provided with independent power sources capable of securing a power source as shown in FIG.

  In FIG. 4, when the traveling car 4 transmits an astigmatism information request signal to the road light A, the road light A returns the astigmatism information to the traveling car 4. At this time, the road light B intercepts the reply signal of the road light A and recognizes that it will reply by the next inquiry. P indicates the communication range of the traveling car 4.

  In FIG. 5, upon receiving the next inquiry from the patrol car 4, the road lamp B transmits its own incongruity information. At this time, the road light C intercepts the reply signal of the road light B and recognizes that it will reply with an inquiry from the next patrol car. In the same manner, each road light recognizes that it is in the order of replying itself to the inquiry from the next patrol car by intercepting the reply signal of the adjacent road light adding device, and replying to the next inquiry. To do.

  FIG. 6 shows a time chart in which the return signal f1 from the road lamp is returned after the traveling vehicle 4 transmits the astigmatism information request signal f1.

According to the present embodiment, even if the frequency handled by the road light adding device included in the communication range of the traveling vehicle for avoiding interference in response to the inquiry from the traveling vehicle 4 is not shown in FIG. Thus, since the reply signal of each road light is inevitably delayed, there is no interference.
(Second embodiment)
A second embodiment according to the present invention will be described with reference to FIGS. This embodiment is the same as the first embodiment except that road light information is collected by a single request signal from a patrol car between a plurality of predetermined road lights. Similarly, the precondition is that each road light stores in advance the address of the road light that is adjacent (immediately next to you in the direction of the traveling car). An independent power source that can secure a power source is provided.

  In FIG. 7, when the astigmatic information request signal is transmitted from the traveling car 4, the road light A transmits a reply signal to the traveling car 4. At this time, the road light B intercepts the reply signal of the road light A.

  In FIG. 8, after confirming the reception of the return signal from the road lamp A, the road lamp B transmits its own information. Then, the road light C receives a reply signal from the road light B, and after confirming the reception, the road light C transmits its own signal. In the same manner, the operation of transmitting the own signal after confirming reception of the reply signals of the adjacent road lights is performed in the same manner.

  FIG. 9 is a time chart of a road lamp transmission signal included in FIGS. 7 and 8 at the same time in response to one inquiry from a traveling car.

  In this communication method, after confirming the completion of a reply of a certain road light, the adjacent road light is started immediately or after a certain time, so that the communication device provided in the patrol car and the additional device for avoiding interference However, a single frequency can be used, and the configuration of the communication device can be simplified.

  In FIG. 10, assuming that the number of road lights included in the communication range P of the patrol vehicle is known in advance, only those road lights are subjected to retransmission processing using individual frequencies f1, f2, and f3 in order to avoid interference. Is. FIG. 11 is a time chart of a transmission signal of a road light that is simultaneously included in response to one inquiry from a traveling vehicle in FIGS.

  In this method, once the road lights receive the astigmatism information request signal from the patrol car 4, after that, the road lights transmit the astigmatism information request signal between the road lights, and each road light sequentially transmits the astigmatism information. Since the traveling worker only needs to receive the signal from the road light to be transmitted, it is possible to shorten the communication time compared to the case of the first embodiment.

(Third embodiment)
A third embodiment according to the present invention will be described with reference to FIG. 12 and FIG. This embodiment describes a case where a certain road light in the first embodiment is out of order. The precondition is that each road light knows the address of the road light that is adjacent (immediately next to you in the direction of the traveling car), and the communication device of the road light additional device of road light A has failed. It is assumed that communication is impossible.

  In FIG. 12, the traveling vehicle 4 transmits an astigmatism information request signal to the road light A. Since road light A is out of order, a reply signal cannot be transmitted.

  In FIG. 13, the traveling vehicle 4 travels, and then the road light B receives the astigmatism information request signal. In this case, since the return signal of the adjacent road light is not received, it is determined that the road light A is out of order, and the road light B is included in the return signal as its own information in the return signal as failure information of the adjacent road light. At the same time, it is transmitted to the traveling vehicle 4 immediately or after a certain time.

  Similarly, when a reply signal to the request from the traveling car 4 cannot be intercepted from the adjacent road light due to a failure of the road light provided in the road light adding device adjacent to the same, the next traveling car 4 is determined to be a malfunction. When the stagnation information request signal is received, the failure information of the adjacent road lamp is returned together with the stigma information.

If this method is applied, it becomes possible to collect the address of the faulty road light together with the collecting work of the incongruity information.
(Fourth embodiment)
A fourth embodiment according to the present invention will be described with reference to FIGS. This embodiment is another method in the case where the communication device included in the road light adding device in the third embodiment is out of order. The precondition is that each road light A to D, a to d knows the address of the road light up to the two next to it, and each road light reaches the road light up to the next two Having the ability to transmit.

  In FIG. 14, it is assumed that the communication device included in the road light adding device for road light B is out of order. When the road light adding device of the road lamp A receives the astigmatism information request signal from the patrol car 4, the road light adding device of the road lamp A transmits a reply signal to the patrol car. At this time, because the road light adding device of the road light B is out of order, the reply signal of the road light A cannot be intercepted, but the road light adding device of the adjacent road light C can be intercepted.

  In FIG. 15, the road light adding device of the road light C receives the return signal from the road light adding device of the road light A and then receives the return signal from the road light B. After receiving the unsatisfactory information request signal from the patrol vehicle 4, it transmits its own signal immediately or after a certain period of time. When the road light additional device of road light B cannot be transmitted due to a failure like this time, from the road light B after receiving the signal from the road light A until the next point information request signal from the patrol car 4 is received If it is not possible to receive this signal, the road light adding device of the adjacent road light B is determined to be out of order, and the road light adding device of the road light C sends the address of the road light B and failure information along with its own signal. good. That is, if all three inputs of the signal from the road light next to you, the signal from the road light next to you, and the astigmatism information request from the patrol car 4 are received, it is judged as normal. If the reply signal from the other road light cannot be received, the failure information of the other road lights is returned to the patrol car together with the own signal.

  With such a configuration, as in the second embodiment, it is possible to collect the address of the faulty road light together with the collection work of the road light astigmatism information.

It is a lineblock diagram of the road light monitoring system of a 1st embodiment of this invention. It is explanatory drawing which shows a road light state detection means. It is explanatory drawing of an independent power supply circuit. It is explanatory drawing explaining communication with a patrol car and a road light addition apparatus. It is explanatory drawing explaining communication with a patrol vehicle and the next road light addition apparatus. It is a time chart of the reply signal of a road light. It is explanatory drawing explaining communication with the patrol car and road light addition apparatus of 2nd Embodiment. It is explanatory drawing explaining communication with a patrol vehicle and the next road light addition apparatus. It is a time chart of the reply signal of the road light. It is explanatory drawing explaining communication with the patrol car of a deformation | transformation form, and a road light addition apparatus. It is a time chart of the reply signal of the road light. It is explanatory drawing explaining communication with the patrol car and road light addition apparatus of 3rd Embodiment. It is explanatory drawing explaining communication with a patrol vehicle and the adjacent road light addition apparatus. It is explanatory drawing explaining communication with the patrol vehicle and road light addition apparatus of 4th Embodiment. It is explanatory drawing explaining communication with a patrol vehicle and the adjacent road light addition apparatus adjacent.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road 3 Road light addition apparatus 4 Patrol car AD, ad road light

Claims (7)

A road light adding device comprising state detection means for detecting the state of the road light, and a transmission circuit for transmitting road light state information and road light installation location information detected by the state detection means as road light information A road light monitoring device in which the road light addition device is installed at or near a plurality of road light columns,
The transmission circuit transmits the road light information to a communication device provided in a patrol car that collects the road light information.
The road light adding device receives a transmission signal transmitted from an adjacent road light adding device to the communication device, and determines its own transmission timing to the communication device.   2. The transmission timing according to claim 1, wherein the transmission timing receives a transmission signal of the adjacent road light adding device, receives a request signal of road light information from the patrol car, and transmits its transmission signal. Road light monitoring device.   The road light monitoring device according to claim 2, wherein the transmission frequency of the transmission circuit of the road light monitoring device included in the communication range of the patrol car is different from each other.   In response to a request signal for road light information from the patrol vehicle to the road light adding device, when a transmission signal from the adjacent road light adding device to the patrol vehicle cannot be received, the transmission signal is transmitted. 2. The road light monitoring device according to 2.   When a transmission signal from the adjacent road light adding device cannot be received in response to a request signal of road light information from the patrol vehicle to the adjacent road light adding device, a road adjacent to the adjacent road light adding device. The road light monitoring device according to claim 2, wherein the road light monitoring device receives a transmission signal from the lamp addition device and transmits its own transmission signal. A road light monitoring device installed on or near a plurality of road light columns is used to detect the state of the road light, and the detected road light state information and the road light installation location information are provided in the patrol car as road light information. A road light monitoring method for transmitting to a communication device,
The road light monitoring apparatus, wherein the road light addition device receives a transmission signal transmitted from an adjacent road light addition device to the communication device, and determines its own transmission timing to the communication device. The said transmission timing receives the transmission signal of the said adjacent road light addition apparatus, receives the request signal of the road light information from the said patrol car, and transmits its transmission signal. Road light monitoring method.

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