JP3886929B2 - Road information provision system using independent power source - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information providing system and an apparatus for displaying road information and the like using an independent power source using natural energy such as solar power generation.
[0002]
[Prior art]
Various light-emitting display devices using a solar power generation device, that is, a stand-alone power source using a solar cell, include, for example, a remote island lighthouse, a traffic safety sign, a road guide light, a street light, and a satellite. Conventional devices include those that are used at night to generate electricity with solar cells during the day, charge and store in storage batteries, discharge and consume them at night, and turn on the light source, as well as road information boards and evacuation guidance boards For example, there is an all-day use type that consumes electricity generated during the day while charging and discharging and always lights up. In addition, Patent Document 1 discloses a road information display device that supplies power from a solar power generation device, and detects an approach of a vehicle and turns on the light display device only when the vehicle passes.
[0003]
[Patent Document 1]
JP-A-10-96214
[0004]
[Problems to be solved by the invention]
A conventional information providing system using a solar power generation apparatus generally includes a solar battery power source, a control device (including an inverter and a converter), a storage battery (battery), a load (light source, display board), and the like. Large-scale solar cells and batteries are required to operate a constant capacity load over a year-round, with a low energy density and fluctuating solar radiation. Especially in the all-day type, power generation and storage facilities are excessive. I have to become something. Or when the electric power by a solar power generation device is insufficient like patent document 1, it is necessary to supplement with an engine type power generation device. Therefore, since the equipment cost increases, the cost effectiveness cannot be expected.
[0005]
However, in order to display and provide various kinds of information on mountain roads and remote areas where commercial power lines are not drawn, it is necessary to rely on an independent power source such as a solar cell. As such a typical information providing apparatus, there is a road information providing apparatus. However, in order to sufficiently secure road users' traffic safety, it is a requirement that the display board is always lit regardless of day or night.
[0006]
In a stand-alone power source using a solar cell, power generation is basically performed in proportion to the amount of solar radiation, so that the power obtained is large during the day but zero at night. On the other hand, the light-emitting display device needs to increase the luminance during the day when the surroundings are bright, but the visibility can be ensured even if the luminance is decreased at night when the surroundings are dark. Therefore, if the same luminance is always displayed, the luminance is insufficient during the day and excessive at night, which is not efficient.
[0007]
In view of the above situation, the information providing system using the independent power source according to the present invention controls and adjusts the load capacity of the system, specifically, the load capacity of the light-emitting display device of the information providing apparatus in proportion to sunlight. Therefore, it aims at reducing power consumption. Thereby, it aims at minimizing the installation capacity for electric power generation and electrical storage. As a result, the equipment costs can be greatly reduced and legal effects can be expected.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an information providing system having the following configuration.
[0009]
(1) According to claim 1Road with independent power supplyThe information provision system uses an independent power supply that uses natural energy.roadDisplay information on lightningroadIn the information provision system, the following configuration(A)-(C)It is characterized by having.
(A)Stand-alone power supply including solar power generator
(B)A monitoring station system installed in a monitoring station and connected to the independent power supply device by a power transmission line, the monitoring station system including a battery for storing electricity transmitted through the power transmission line
(C)Connected to the monitoring station building system by communication line and power supply lineroadAn information providing apparatus, comprising: an ultra-high brightness LED display board that receives power supply from the battery via the power supply lineroadAnd an information providing device.
  In addition, the above ( B ) The monitoring station system further includes the following elements (B1) and (B2).
(B1) A battery charge / discharge monitoring control apparatus that monitors the charge / discharge amount of the battery and outputs charge / discharge data.
(B2) A recording unit that records charge / discharge data output from the battery charge / discharge monitoring control device, and a transmission unit that transmits at least charge voltage data of the charge / discharge data to the road information providing device via the communication line. Station alarm monitoring device comprising
And above ( C ) The road information providing device further includes the following elements (C1) to (C3).
(C1) Illuminance sensor that detects ambient illuminance and outputs illuminance data
(C2) A first adaptive luminance level corresponding to the illuminance data detected by the illuminance sensor based on a first comparison table in which the numerical value of the first adaptive luminance level is previously associated with the numerical value of the ambient illuminance. And a second adaptive luminance level corresponding to the transmitted charging voltage data based on a second comparison table that is determined in advance and that the numerical value of the second adaptive luminance level is previously associated with the numerical value of the charging voltage. And determining the lower one as the adaptive luminance level by comparing the determined first adaptive luminance level and the determined second adaptive luminance level, and corresponding to the determined adaptive luminance level Brightness determination unit that outputs brightness specification data
(C3) A luminance adjustment unit that outputs a luminance adjustment signal to a driver unit that drives the ultra-high luminance LED display board based on the luminance designation data from the luminance determination unit
The invention according to claim 1 achieves power saving by performing luminance adjustment based on the ambient illuminance and the battery charge amount.
[0015]
(2Claim2Pertaining toRoad with independent power supplyThe information providing system is claimed1The luminance adjustment unit inputs a luminance signal included in display control data output from a display control unit that controls the driver unit of the ultra-high luminance LED display board, and the luminance signal is based on the luminance designation data. The brightness adjustment signal is generated by adjusting and is output to the driver unit of the ultra-high brightness LED display board.
[0016]
(3Claim3Pertaining toRoad with independent power supplyThe information providing system is claimed2The brightness signal is an enable signal for determining whether to turn on or off each element of the ultra-high brightness LED display panel.
[0017]
(4Claim4Pertaining toRoad with independent power supplyThe information providing system is claimed in claims 1 to 4.3In any of the above, the monitoring station system further includes the following elements.
・ A building environment sensor that detects environmental changes related to monitoring stations
・ Station building environment maintenance device that maintains the building environment in an appropriate state
A station facility control unit that controls the station environment maintenance device based on environment change data from the station environment sensor
[0018]
(5Claim5Pertaining toRoad with independent power supplyThe information providing system is claimed4The station environment sensor is a temperature sensor that detects the temperature in the station, and the station environment maintenance device is an indoor ventilation fan and a heater.
[0019]
(6Claim6Pertaining toRoad with independent power supplyThe information providing system is claimed in claims 1 to 4.5In any of the above, the monitoring station system further includes theroadIt has a sub-control device that can rewrite display control data stored in a display control unit that controls a driver unit of the ultra-high brightness LED display board of the information providing device via the communication line.
[0020]
(7Claim7Pertaining toRoad with independent power supplyThe information providing system is claimed in claims 1 to 4.6In any of the above, the independent power supply device includes a wind power generator.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings.
  FIG. 1 is according to the invention.roadInformation provision systemExampleIt is the block diagram which showed the outline | summary typically. BookThe present invention provides an electronic power display for displaying various information using an independent power supply using natural energy in an area where commercial power cannot be used.roadIt relates to the information provision system.
[0022]
As shown in FIG. 1, a stand-alone power supply device 30 using natural energy is installed at a location that satisfies an appropriate location condition. The stand-alone power supply device 30 in the present invention mainly includes a solar power generation device, that is, a solar cell 31, but the wind power generation device 32 may be used as an auxiliary. This is in order to supplement the stability of the entire independent power supply 30 by using wind energy in combination to compensate for fluctuations and leanness of solar energy (irradiation). As an example, if a photovoltaic power generation device 31 consisting of six solar cell panels (1.2 m × 0.802 m, rated output 145 W) is attached to one column, the rated output of photovoltaic power generation with eight columns is 6960 W . Furthermore, when the wind power generation device 32 with a rated output of 72 W is attached to each column, the rated output of wind power generation with eight columns becomes 576 W.
[0023]
A monitoring station building system connected to the independent power supply 30 and the power transmission lines 40a and 40b is installed at an appropriate location. Electricity generated by the independent power supply device 30 is sent from the solar power generation device 31 and the wind power generation device 32 to the monitoring station building system 20 via separate power transmission lines 40a and 40b. The monitoring station building system 20 is installed in the monitoring station building 201, and includes various devices described later. One of these various devices is a battery, and the electricity sent through the transmission line is stored in the battery.
[0024]
Furthermore, the road information providing apparatus 10 connected to the monitoring station building system 20 by the communication line 41 and the power supply line 42 is installed at an appropriate place where road information is to be displayed. The road information providing apparatus 10 includes an ultra-high brightness LED display board 11. The ultra-high brightness LED display board 11 performs an electric display by receiving power supply from the battery of the monitoring station building system 20 through the power supply line 42.
[0025]
The ultra-high brightness LED display board 11 has a maximum brightness of about 9000 cd / m, for example.²Is a panel type device (dot matrix panel) in which a predetermined number of two-color (red, green) ultra-bright LED elements are arranged in a matrix in the vertical and horizontal directions. A three-color display in which orange is added by simultaneous lighting of red and green can also be used. Preferably, the ultra-high brightness LED display panel 11 has a rated brightness of about 3000 cd / m.²Although it is above, it is not limited to this value. Here, the rated luminance indicates an average luminance including a non-light emitting portion of the display surface immediately after lighting. The brightness of the light emitting diode can be adjusted by digital control. In the present invention, brightness adjustment is performed using a brightness adjustment method unique to the present invention described later. On the other hand, the lighting rate is a ratio obtained by dividing the number of lit dots by the number of all dots on the display surface, and is distinguished from luminance.
[0026]
By controlling the lighting of each LED element corresponding to one dot (pixel) of the dot matrix panel, various characters, numbers, figures, etc. can be displayed as still images or moving images. In a large display panel, a plurality of dot matrix panels are used in combination. Usually, a driver unit (driving method is arbitrary) for driving the dot matrix panel and a display control unit for sending display control data to the driver unit are configured using a logic IC or the like. Is attached. Although the configuration of the driver unit varies depending on the driving method, for example, the driver unit includes a shift register circuit, a latch circuit, a low current driver, and the like provided for each color of the LED element. Furthermore, a power supply control unit that supplies power to the LED elements and the electronic circuit board is also provided in parallel. These electric control systems will be described later.
[0027]
The ultra-high brightness LED element employed in the present invention has an electro-optical conversion efficiency 4 to 5 times that of a conventional LED element, and the maximum electricity consumption is reduced by about 30%. As a result, for example, with the HL7 type geometry in the road information providing apparatus, it has been realized that the rated voltage current, which was 3.3V10A in the past, is reduced to 3V7A. When comparing the normal power consumption when this HL7 type ultra-high brightness LED display panel and a conventional HL7 type LED display panel are driven using a commercial power supply, the former is 350 W, whereas the latter is 3 KW ( An average of 30% lighting operation for 24 hours). Compared with the conventional LED display board using a commercial power supply by supplying power to the ultra-high brightness LED display board with low power consumption using a stand-alone power generator that uses natural energy. As a result, the power consumption was reduced to 1/6 to 1/8.
[0028]
In the system of one embodiment of FIG. 1, the satellite station 29 is included in the monitoring station building system 20, and between the artificial satellite 50 and the management server 61 provided in the road information management office 60 via the satellite antenna 52. Bidirectional information transmission is possible. Thus, data such as the power generation amount of the independent power supply, the charge / discharge amount of the battery, and the environment (temperature, etc.) in the monitoring station can be transmitted from the monitoring station system 20 to the management server 61. In addition, rewrite data for rewriting display control data stored in the display control unit of the road information providing apparatus 10 can be transmitted from the management server 61 to the monitoring station system 20, and the communication line 41 can be transmitted from the monitoring station system 20. It can be transmitted to the road information providing apparatus 10 via. Such a control system via satellite communication is arbitrarily provided.
[0029]
FIG. 2 is a schematic configuration diagram more specifically showing the main part of the road information providing system of FIG. In the figure, a solid white arrow schematically shows a main data flow, and a wavy black arrow schematically shows a main power supply flow.
[0030]
The road information providing apparatus 10 includes a driver unit 17, a display control unit 13, and a power supply control unit 14 that drive the ultra-high brightness LED display board 11 as a main electric control system. These structural divisions are based on conceptual functions and do not necessarily correspond to individual elements on an actual electronic circuit board. Each function of the electric control system of the road information providing apparatus 10 can be implemented by, for example, a logic circuit including a logic IC including a PIC (periheral interface controller), but there are various specific designs. A PIC that is preferably used is a logic IC that includes a program memory that stores a program describing a predetermined logical process, an arithmetic processing unit that executes the program, a data memory that stores necessary data, and the like. In order to perform proper control, it is frequently used in computer peripheral devices and small electronic devices.
[0031]
The display control unit 13 includes an appropriate data memory 131. The memory 131 stores display control data for controlling the driver unit 17 in accordance with the information content to be displayed. For example, display control data is extracted from the memory 131 according to the driving method, and is output to the driver unit 17 together with a latch signal, an enable signal, and the like.
[0032]
The power supply control unit 14 is a control for supplying the power supplied from the monitoring station building system 20 through the power supply line 42 as the power supply for the LED display board and the electronic circuit which are each component of the road information providing apparatus 10. (Reference numeral 141) is performed. In many embodiments, the information on the LED panel is not always lit and is not displayed when not needed. However, it is in a standby state because it does not know when the information needs to be displayed. Power is also consumed during standby. In order to suppress this power consumption as much as possible, the power supply control unit 14 performs control to turn on and off a logic circuit power supply (not shown) for display control. The power supply for logic circuits is an energy saving type per panel and consumes up to 300mA. Actually, the ultra-high brightness LED display panel (HL7 type) of the embodiment uses 126 16 × 16 dot matrix panels of 4 mA per panel, and when not using a memory, a minimum of 500 mA and a maximum power of 189 W are used. Consume. The power obtained by eliminating unnecessary consumption during standby is a value that cannot be ignored. In one embodiment, an LED display panel consisting of 126 panels is divided into a total of 6 blocks arranged in 3 blocks horizontally and 2 blocks vertically, and power control is performed for each block. Power is not supplied to blocks that are not lit.
[0033]
Furthermore, the present invention includes a luminance determination unit 15 and a luminance adjustment unit 16 described later as an electric control system. These can also be implemented as a logic circuit composed of a logic IC including a PIC, for example.
[0034]
Furthermore, the road information providing apparatus 10 includes an illuminance sensor 12 for detecting the ambient illuminance. The illuminance sensor 12 is integrally attached to the panel housing at an appropriate location that does not hinder display. When the illuminance data output of the illuminance sensor 12 is analog data, it is converted into digital data and input to the luminance determination unit 15 (reference numeral 151). On the other hand, in a preferred embodiment of the present invention, at least charging voltage data among the charging / discharging data of the battery 25 is transmitted from the monitoring station building system 20 via the communication line 41, and the luminance determining unit 15 receives this (reference sign). 152). The communication line 41 is a LAN, for example, and the communication protocol is, for example, TCP / IP. The luminance determination unit 15 executes a logic process for determining an appropriate luminance level (referred to as “adaptive luminance level”) of the ultra-high luminance LED display board at the present time based on both the illuminance data and the charging voltage data. (Reference numeral 153). If the adaptive luminance level is determined, luminance designation data corresponding to the adaptive luminance level is output to the luminance adjustment unit 16 (reference numeral 154). The luminance designation data is, for example, 7-bit digital data that can distinguish 100 levels of luminance.
[0035]
The luminance adjustment unit 16 receives the luminance designation data sent from the luminance determination unit 15 (reference numeral 161), and outputs a luminance adjustment signal to the driver unit 17 that drives the ultra-high luminance LED display board 11 based on this data. . Here, the luminance adjustment signal is a signal obtained by adjusting the constant luminance signal output from the display control unit 13 using the luminance designation data so as to match the adaptive luminance level determined by the above logical process. Specifically, for example, an enable signal included in the display control data output from the display control unit 13 is used. Here, the enable signal is a signal for controlling lighting / extinguishing of each LED element (for example, lighting with H, lighting with L), and the brightness can be adjusted by the length of the lighting time. Specifically, when the enable signal is composed of a repetitive pulse of H level and L level having a constant frequency (for example, 1 kHz), the ratio of the pulse width of H level and L level is adjusted. If the lighting time is long, the luminance is high, and if the lighting time is short, the luminance is low. Accordingly, the luminance adjustment unit 16 once captures the enable signal output from the display control unit 13 (reference numeral 162), adjusts the enable signal according to the luminance designation data (reference numeral 163), and then returns the adjusted enable signal to the driver unit. By outputting to 17 (symbol 164), the ultra-high brightness LED display plate 11 can be turned on with appropriate brightness.
[0036]
FIG. 3 is a flowchart schematically showing an adaptive luminance level determination processing flow by the luminance determination unit 15 of FIG. In step S1, illuminance data from the illuminance sensor is input to obtain ambient illuminance information. In step S2, charging voltage data is received from the station alarm monitoring device of the monitoring station building system to obtain charging voltage information. Steps S1 and S2 may be mixed in time series.
[0037]
In step S3, a first adaptive luminance level that is an appropriate luminance level is obtained based on the ambient illuminance information. Reference is now made to FIG. FIG. 4 (A) is a comparison table between the ambient illuminance and the corresponding adaptive brightness level (first adaptive brightness level). The left column shows the numerical levels of the ambient illuminance in stages, and the right column shows the corresponding adaptive brightness level. Are shown by stage. In this comparison table, the adaptive luminance level is gradually decreased from a high value to a low value as the ambient light intensity is gradually decreased from the high ambient light intensity. This is because, for example, when the ambient illuminance is high, such as in the daytime, it is necessary to increase the brightness so that it can be viewed, and when the ambient illuminance is low, such as at night, it can be viewed even when the brightness is low. is there. The numerical value of the luminance level is luminance 8800cd / m.²That is, the maximum brightness of the ultra-bright LED element to be used is 100%.
[0038]
In step S4, a second adaptive luminance level that is an appropriate luminance level is obtained based on the charging voltage information. Note that step S3 and step S4 may be mixed in time series. Here, FIG. 4 will be referred to again. FIG. 4B is a comparison table of the charging voltage and the corresponding adaptive luminance level (second adaptive luminance level). The left column shows the numerical level of the charging voltage in stages, and the right column shows the corresponding adaptive luminance level. Are shown by stage. In this comparison table, the adaptive luminance level is gradually decreased from a high value to a low value as the charge voltage is sequentially decreased from a high charge voltage to a low charge voltage. This is because when the charging voltage is high, the driving can be performed even if the load is increased, but when the charging voltage is low, the driving cannot be sufficiently performed unless the load is reduced. Thereby, it is possible to protect the battery from being overcharged or overdischarged. That is, when the charging voltage is high, the load is increased to promote power consumption, and when the charging voltage is low, the load is reduced to suppress power consumption.
[0039]
4 is stored in advance in a ROM, which is a data memory in the PIC, for example, so that the program stored in the program memory is read out appropriately when the arithmetic processing unit executes the program. May be.
[0040]
Next, in step S5, it is determined which of the first adaptive luminance level and the second adaptive luminance level obtained in steps S3 and S4 is lower. In the present invention, since the power saving is a basic policy, the lower one is selected. If the first adaptive luminance level is lower, the first adaptive luminance level is determined as the “adaptive luminance level” in step S6. On the other hand, if the second adaptive luminance level is lower, the second adaptive luminance level is determined as the “adaptive luminance level” in step S7.
[0041]
In step S8, luminance designation data indicating the determined adaptive luminance level is generated and output to the luminance adjustment unit.
[0042]
In one embodiment, the flow of processing until the ultra-high brightness LED display board is turned on is summarized as, for example, the following (1) to (8).
(1) Analyze lighting bitmap information (which dot is lit) included in the display control data.
(2) Analyze which of the 6 blocks is displayed.
(3) Detect ambient illuminance from the illuminance sensor.
(4) Acquire charging voltage data from the station alarm monitoring device.
(5) An adaptive luminance level is determined based on ambient illuminance and charging voltage data.
(6) Supply power to the necessary blocks and send a reset signal to the logic circuit of the logic circuit power supply.
(7) A display control data signal indicating a dot to be lit is transferred.
(8) Send a lighting start signal (brightness adjustment signal with adjusted enable signal).
[0043]
Although not shown, another embodiment in which the adaptive luminance level determination processing flow of FIG. 3 is simplified will be described. In this alternative embodiment, the adaptive brightness level is determined based only on ambient illumination information from the illumination sensor. That is, the adaptive luminance level is obtained based on the ambient illuminance information using only the comparison table of FIG. The luminance adjusting unit adjusts the luminance signal based on the luminance designation data as described above.
[0044]
FIG. 5 schematically shows a circuit configuration of the display control unit 13, the luminance adjustment unit 16, the driver unit 17, and the ultra-high luminance LED display board (however, only one 16 × 16 dot matrix panel) 11 in one embodiment. It is a figure. The other dot matrix panels sequentially connected via the interface circuit have the same configuration.
[0045]
Next, returning to FIG. 2, the monitoring station building system 20 will be described in more detail. The monitoring station building system 20 includes a battery charge / discharge monitoring control device 24 that monitors the charge / discharge amount of the battery 25 and outputs charge / discharge data. The specific configuration of the battery 25 is, for example, that four batteries with a rating of 6V200Ah are bundled in series so that a rating of 24V is one unit, and 12 units are connected in parallel (rating is 24V2400Ah). A battery charge / discharge monitoring control device 24 is connected to the input / output unit of each unit to detect the charge voltage, charge current, consumption (discharge) voltage, and consumption (discharge) current, respectively, and correspond to the detected charge / discharge amount. An analog signal output is sent to the station alarm monitoring device 21. In the embodiment, the charge / discharge amount detection signal is transmitted at intervals of 1 second.
[0046]
The station building alarm monitoring device 21 is a so-called main control device of various devices included in the monitoring station building system 20. The station warning monitoring device 21 records a control program and data sent from each device in addition to an arithmetic processing unit (not shown) that executes a logical process (program) related to control and data processing of each device. A recording unit 211 including the storage device and a transmission unit 213 including a communication device for transmitting data to the road information providing device 10 via the communication line 41. The communication line 41 is a LAN, for example, and communicates using the TCP / IP protocol.
[0047]
The station building alarm monitoring device 21 analog-digital converts the charge / discharge amount detection signal from the battery charge / discharge monitoring control device 24, and at least the charge voltage data of the charge / discharge data is transmitted via the transmission unit 231 and the communication line 41. It transmits to the road information provision apparatus 10. Furthermore, the station warning monitoring apparatus 21 integrates the digitally converted charge / discharge amount data every predetermined time and records the accumulated data in the recording unit 211.
[0048]
The monitoring station building system 20 further includes a solar power generation monitoring device 22 and a wind power generation monitoring device 23 that monitor the amount of power generated from each independent power source, that is, the solar battery 31 and the wind power generator 32. These generated power monitoring devices 22 and 23 each incorporate a measuring device such as an ammeter for detecting the amount of power generation and a voltage control circuit for stabilizing the voltage of the generated electricity. The detected power generation amount, that is, the analog signal output corresponding to the generated current and the generated voltage is sent to the station alarm monitoring device 21.
[0049]
The station building warning monitoring device 21 performs analog-digital conversion on the detection signal of the power generation amount from each of the generated power monitoring devices 22, 23, integrates the digitally generated power generation amount data every predetermined time, and records it in the recording unit 211. To do.
[0050]
Furthermore, the monitoring station system 20 includes a station environment sensor 26 that detects an environmental change related to the monitoring station, and a station environment maintaining device 27 that maintains the station environment in an appropriate state. Specifically, for example, the former is a temperature sensor that measures the temperature in a building, and the latter is an indoor ventilation fan and a heater. Furthermore, a station building control unit 212 that controls the station building environment maintenance device 27 based on the environmental change data output from the station building environment sensor 26 is provided in the station building alarm monitoring device 21, for example. If the station building control unit 212 determines that the temperature in the monitoring station has exceeded the upper limit based on the output of the temperature sensor 26, the fan 27 is operated to lower the temperature in the monitoring station, and if the temperature falls to the normal temperature, Stop the fan. This is particularly effective in preventing temperature rise due to excessive power generation during spring, summer and autumn. If it is determined that the temperature in the monitoring station has fallen below the lower limit, the heater 27 is operated to increase the temperature in the monitoring station, and if the temperature rises to a normal temperature, the heater is stopped.
[0051]
Other station environment sensors 26 include detection that the door of the monitoring station is opened, detection of disconnection of the power generation input breaker from each independent power supply, detection of disconnection of the heater and fan output breaker, and detection of the battery temperature upper limit. There are sensors for detecting the battery fluid shortage, detecting the battery protection breaker disconnection, etc. (the fan is also operated for cooling in this case).
[0052]
Outputs from these station environment sensors 26 are input to the station building control unit 212 at intervals of 1 second, for example. When an abnormality is detected, the abnormality notification data is transmitted to the road information providing apparatus 10 via the communication line 41. The display control unit 13 or the power supply control unit 14 of the road information providing apparatus 10 executes a predetermined process according to the content of the abnormality detection data. Further, it is also recorded in the recording unit 211.
[0053]
Preferably, the monitoring station building system 20 includes a sub-control device 28 which is a computer operation terminal device. The sub-control device 28 is also connected to the road information providing device 10 via the communication line 41 and can transmit bidirectional information. Then, by operating the sub-control device 28, the display content of the ultra-bright LED display board 11 of the road information providing device 10 can be changed. For example, an application for rewriting the display control data stored in the PIC constituting the display control unit 13 that controls the display content of the ultra-high brightness LED display board 11 has been introduced into the sub-control device 28. And the display control unit 13 are connected by a LAN and communicate by the TCP / IP protocol.
[0054]
【Example】
Next, measurement results for one year (April to March of the following year) in the information providing system using the independent power supply device of the present invention described in FIG. 1 will be shown. The results for the first six months from April to September are as follows.
Average power generation per hour: 1571Wh
Maximum power generation: 3107Wh (August 3rd)
Minimum power generation: 551Wh (July 23)
Average power consumption per hour: 206Wh
Maximum power consumption: 513Wh (September 16)
Minimum power consumption: 149Wh (May 25)
In addition, in order to suppress the battery temperature rise in the monitoring station building in summer, automatic ventilation control in the monitoring station was performed by operating a fan using surplus power from June 25th.
[0055]
FIG. 6 shows the measurement results after October. This period is under severe weather conditions where sunshine hours and solar radiation are reduced. The generated power on the vertical axis of each graph indicates a value converted into the above-mentioned one support column (six solar cells, one wind power generator). The horizontal axis shows the time course over one week. The solid line is the generated power per hour, and the wavy line is the consumed power per hour. 6A to 6C show measurement results for different periods. In addition, the power generation capacity ratio of the solar battery / wind generator in the stand-alone power supply device was 12: 1, and most of the power generation was due to solar energy.
[0056]
In FIG. 6A, it was sunny on November 3, 4, and 6, and it was cloudy on the other days. The super bright LED display board of the information providing apparatus of the present invention has increased power consumption to increase the LED brightness in accordance with the ambient illuminance during the day, but it decreases in the morning and evening and remains constant at 180 W at night. It worked smoothly.
[0057]
In FIG. 6 (b), December 22 and 25 were sunny, and the other days were cloudy. It can be seen that the brightness was controlled according to the weather. The 26th day was a cloudy day with thick clouds, and the ambient illuminance was very low, so the brightness was hardly adjusted.
[0058]
In FIG. 6C, only January 3 was clear and the other days were cloudy. In particular, the power generated around the end of December remained extremely low. However, the battery charge power and the amount of daily power generation on a fine day are enough to cover the power consumption on continuous cloudy days, maintain a 180W baseline, and adjust the brightness during the day.
[0059]
【The invention's effect】
As described above, according to the present invention, in an information providing system that performs electroluminescence display of information using a stand-alone power supply device that uses natural energy, by providing an ultra-bright LED display plate of the information providing device, power consumption can be reduced. Realize reduction.
Furthermore, the adaptive brightness level is determined based on the ambient illuminance, and more preferably, the adaptive brightness level is determined based on the ambient illuminance and the battery charging voltage, and the brightness of the ultra-high brightness LED is adjusted, thereby reducing wasteful power. Realize saving consumption. This also has the effect of preventing overcharging and overdischarging of the battery.
Since low power consumption has been realized in this way, the equipment capacity for power generation and power storage can be minimized. As a result, the equipment costs can be greatly reduced and legal effects can be expected.
[Brief description of the drawings]
FIG. 1 is a configuration diagram schematically showing an outline of an embodiment in which an information providing system according to the present invention is applied to a road information providing system.
2 is a schematic configuration diagram more specifically showing a main part of the road information providing system of FIG. 1; FIG.
3 is a flowchart schematically showing an adaptive luminance level determination processing flow by the luminance determination unit 15 of FIG. 2;
FIG. 4A is a comparison table between the ambient luminance and the corresponding adaptive luminance level (first adaptive level), and FIG. 4B is the adaptive luminance level (second adaptive level) corresponding to the charging voltage; This is a comparison table.
FIG. 5 is a diagram schematically illustrating a circuit configuration of a display control unit, a brightness adjustment unit, a driver unit, and an ultra-high brightness LED display board (however, only one 16 × 16 dot matrix panel) in one embodiment. .
FIGS. 6A to 6C are graphs showing measurement results in three periods from November to January of the following year in the information providing system using the independent power supply device of the present invention, respectively.
[Explanation of symbols]
10 Road information provision device
11 LED panel
12 Illuminance sensor
13 Display controller
14 Power supply control unit
15 Luminance determination part
16 Brightness adjuster
17 Driver section
20 Monitoring station building system
21 Station alarm monitoring device (main control device)
22 Solar power generation monitoring device
23 Wind power generation monitoring device
24 Battery charge / discharge monitoring and control device
25 battery
26 Office environment sensor
27 Office building environmental maintenance equipment
28 Sub-control device
29 Satellite communication equipment
30 Independent power supply
31 Solar cell
32 Wind power generator
40a, 40b Transmission line
41 Communication line
42 Power supply line
50 artificial satellites
52 Satellite antenna
60 Road management office
61 Management server
62 Communication device
201 Monitoring station building

Claims (7)

In a road information providing system that performs lightning display of road information using an independent power supply using natural energy,
A stand-alone power supply including a solar power generation device;
A monitoring station system installed in a monitoring station and connected to the independent power supply device by a transmission line, the monitoring station system including a battery for storing electricity transmitted through the transmission line; ,
Wherein a connecting road information providing device and the monitoring center office system by communication lines and power supply lines, the road information having a super bright LED display panel which receives the power supply from the battery via the electric power supply line have a and providing apparatus,
The monitoring station building system further includes:
A battery charge / discharge monitoring control device for monitoring the charge / discharge amount of the battery and outputting charge / discharge data;
A recording unit that records charging / discharging data output from the battery charge / discharge monitoring control device and a transmission unit that transmits at least charging voltage data of the charging / discharging data to the road information providing device via the communication line. A station alarm monitoring device,
The road information providing device further includes:
An illuminance sensor that detects ambient illuminance and outputs illuminance data;
Determining a first adaptive luminance level corresponding to the illuminance data detected by the illuminance sensor based on a first comparison table in which the numerical value of the first adaptive luminance level is previously associated with the numerical value of the ambient illuminance; A second adaptive luminance level corresponding to the transmitted charging voltage data is determined based on a second comparison table in which the numerical value of the second adaptive luminance level is previously associated with the numerical value of the charging voltage. Further, by comparing the determined first adaptive luminance level and the determined second adaptive luminance level, the lower one is determined as the adaptive luminance level, and luminance designation data corresponding to the determined adaptive luminance level A luminance determining unit that outputs
A stand-alone power supply comprising: a brightness adjustment unit that outputs a brightness adjustment signal to a driver unit that drives the ultra-high brightness LED display panel based on the brightness designation data from the brightness determination unit There was a road information provision system. The luminance adjustment unit inputs a luminance signal included in display control data output from a display control unit that controls the driver unit of the ultra-high luminance LED display board, and adjusts the luminance signal based on the luminance designation data The road information providing system using an independent power source according to claim 1 , wherein the brightness adjustment signal is generated and output to a driver unit of the ultra-high brightness LED display board. The road information providing system using an independent power source according to claim 2 , wherein the luminance signal is an enable signal for determining whether each element of the ultra-high luminance LED display panel is turned on or off. The monitoring station building system further includes:
A station environment sensor that detects environmental changes related to the monitoring station,
A station environment maintenance device for maintaining the station environment in an appropriate state;
A stand-alone power source according to any one of claims 1 to 3 , further comprising a station building control unit that controls the station building environment maintenance device based on environmental change data from the station building environment sensor. Used road information provision system. 5. The road using an independent power source according to claim 4 , wherein the station environment sensor is a temperature sensor for detecting a temperature in the station building, and the station environment maintenance device is an indoor ventilation fan and a heater. Information provision system. The monitoring station building system further includes:
It has a sub-control device that can rewrite display control data stored in a display control unit that controls a driver unit of the ultra-high brightness LED display board of the road information providing device via the communication line. A road information providing system using the stand-alone power source according to any one of claims 1 to 5 . The road information providing system using an independent power source according to any one of claims 1 to 6 , wherein the independent power supply device includes a wind power generator.

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