JPH07133604A - Electric sign board for road - Google Patents

Abstract

PURPOSE:To operate an electric sign board for road by effectively making use of electricity generated by a solar buttery in a place where traffic density is comparatively low, and power supply from a commercial power supply is hardly available. CONSTITUTION:When a vehicle 3 passes through over a road-way 1, the passage of the vehicle 3 is detected by a vehicle passage detecting sensor 11 buried in the road-way 1, and electric power which has been generated by a solar battery unit 15 so as to be accumulated, is supplied to an electric sign board 9 for a definite period of time since then. Thus, information to the driver of the vehicle 3 by patterns such as characters, figures and the like is given with the electric sign board 9 flashed and indicated by this power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric bulletin board device for a road, which is provided on a roadway and provides information to vehicles passing through the roadway. The present invention relates to an electronic bulletin board device suitable for being installed in a place where it is difficult to receive power supply.

[0002]

2. Description of the Related Art For example, on a road with a lot of curves, such as in a mountainous area, with poor visibility, there is a fluorescent sign such as a sign that warns of falling stones from an oncoming vehicle or a slope on the side of the road, or a sign that lights a night light. Various road signs drawn with paint are installed, and in some cases, road signs using an electronic bulletin board are installed so that the driver can be surely recognized. However, in general, on a road such as in a mountainous area, a commercial power supply line is often not nearby, and it is difficult to operate the electronic bulletin board by receiving power from the commercial power supply. Therefore, it is conceivable to use a solar cell as a power source for the electronic bulletin board as described above.

[0003]

By the way, a solar cell converts light energy into electric energy and generates power in accordance with the amount of sunlight, so the amount of power generation is limited and how effectively the generated power is used. Whether you do it or not is an important issue. Therefore, if the electronic bulletin board is always operated on a road where there are not many passing vehicles such as in mountainous areas, the electricity generated by the solar cells is consumed even when there are no passing vehicles, and there is no sunshine, and the display on the electronic bulletin board is particularly effective. There is a risk that the electronic bulletin board may not operate due to lack of power at night. The present invention has been made in view of the above points, and an object of the present invention is to effectively use the electric power generated by a solar cell in a place where the traffic of a vehicle is relatively small and the power supply from a commercial power source is difficult to receive. Another object of the present invention is to provide an electric bulletin board device for a road that can be operated by utilizing it.

[0004]

In order to achieve the above-mentioned object, the present invention provides an electronic bulletin board which is arranged in the vicinity of a roadway and displays information about vehicles passing through the roadway, and an electric bulletin board arranged in the vicinity of the electronic bulletin board. Stored solar cell, a power supply circuit that stores the electric power generated by the solar cell, and that supplies the stored electric power to the electronic bulletin board, a passing vehicle detection sensor that detects a vehicle passing through the roadway, and the passing A control means for controlling the supply of electric power from the power supply circuit to the electronic bulletin board based on the detection result of the vehicle detection sensor.

Further, according to the present invention, the passing vehicle detection sensor is constituted by a pressure sensitive sensor laid on the roadway.

[0006]

EXAMPLES Examples of the present invention will be described below. FIG. 1 is a schematic configuration diagram of an electric bulletin board device for a road according to an embodiment of the present invention. In the figure, 1 is a roadway, 3 is a vehicle passing through the roadway 1, 5 is a road electric bulletin board device, and the road electric bulletin board device 5 is a pillar 7 standing upright on a side of the roadway 1, An electronic bulletin board 9 which is supported above the pillar 7 and is arranged above the road 1, a vehicle passage detection sensor 11 which detects a vehicle 3 passing through the road 1, and the pillar 7
Support panel 13 supported on the side of the
3 attached to the solar cell unit 15, and when the vehicle passage detection sensor 11 detects the vehicle 3 passing through the roadway 1, the vehicle 3 is displayed on the electronic bulletin board 9.
Information for the driver is displayed.

In this embodiment, the solar cell unit 15
However, although the energy conversion efficiency is slightly inferior to that of a crystalline solar cell, it is lightweight, suitable for mass production, and cheap in cost, and an amorphous solar cell panel 17 and an underlayer 1.
It is composed of 9 and 9. The amorphous solar cell panel 17 includes a stainless substrate 21 as shown in the sectional front view of FIG. The stainless steel substrate 21 has a thickness of 0.125 mm, for example, and also functions as a negative electrode. An amorphous silicon layer 23 is formed on the stainless steel substrate 21.
The silicon layer 23 is formed in a known multi-layer structure including a P layer, an I layer, and an N layer necessary for forming an amorphous solar cell. A transparent electrode 25 is formed on the amorphous silicon layer 23, and this transparent electrode 25 functions as a + electrode.

A fluorine resin is coated on the bottom of the stainless steel substrate 21 and on the transparent electrode 25 to form protective layers 27 and 2.
9 is formed, the thickness of these protective layers 27 and 29 is 1.0 mm, for example, and the protective layer 29 on the transparent electrode 25 is formed of a light transmissive fluorine resin. The transparent electrode 25 and the protective layer 29 side is the light receiving surface (front surface) 17A of the amorphous solar cell panel 17, and the stainless steel substrate 21 and the protective layer 27 side is the back surface 17B of the amorphous solar cell panel 17.

The underlayer 19 is made of synthetic resin and is formed on the back surface 17B of the amorphous solar cell panel 17. The amorphous solar cell panel 17 has a base layer 19
The thickness of the portion excluding (3) is 3 mm or less, and it has a certain degree of flexibility, and since the underlayer 19 also has flexibility, it has excellent adhesion to the support panel 13. A large number of solar cell units 15 having such a structure are stretched around the support panel 13 and are bonded to the support panel 13 via the base layer 19 with an adhesive (not shown).

Lead wires 31 are connected to the transparent electrode 25 (+ electrode) and the stainless steel substrate 21 (-electrode) respectively, and these lead wires 31 are used for preventing backflow of current as shown in a block diagram of FIG. The element, the overcharge prevention circuit, and the storage circuit 33 including a storage battery are connected via the changeover switch 35, and the electric power generated by the amorphous solar cell panel 17 is stored in the storage battery.

The electronic bulletin board 9 is provided with a large number of light emitters (not shown) arranged according to the pattern of characters, figures, etc. displayed on the electronic bulletin board 9, and like the lead wire 31, the switching is performed. It is connected to the storage circuit 33 via a switch 35. The vehicle passage detection sensor 11 is composed of, for example, a pressure-sensitive sensor made of a piezoelectric element or the like, and is embedded in the roadway 1 over the entire lane width thereof. In this embodiment, in order to prevent erroneous detection, The vehicle passage detection sensor 11 is provided at one of the two roads spaced apart in the traveling direction.
Are buried respectively. Each of the vehicle passage detection sensors 11 is C through a lead wire (not shown) laid in an underground pipe and an interface circuit 37 shown in FIG.
It is connected to the PU 39. The CPU 39 is provided to control the switching operation of the changeover switch 35, and the CPU 39 includes a timer circuit 41 and a relay circuit 4
3 is connected.

According to the electric bulletin board device 5 for a road according to the present embodiment, when the vehicle 3 passes over each of the vehicle passage detection sensors 11 embedded in the roadway 1, each vehicle is weighed by the weight of the vehicle 3. An electromotive force is generated in the passage detection sensor 11, the current flowing in each vehicle passage detection sensor 11 is detected by the CPU 39, and the passage of the vehicle 3 on each vehicle passage detection sensor 11 is recognized by the CPU 39. . When the CPU 39 detects passage of the vehicle 3 on the two vehicle passage detection sensors 11, the CP
Under the control of U39, the timer circuit 41 starts time counting for a predetermined time (for example, several seconds), and until the time counting ends, the relay circuit 43 is driven by the control of the CPU 39, and the relay circuit 43 is controlled.
Of the lead wire 31
From the side to the electronic bulletin board 9 side. After the elapse of the predetermined time, the changeover switch 35 is switched from the electronic bulletin board 9 side to the lead wire 31 side by the drive of the relay circuit 43 under the control of the CPU 39, and the light emitting display by the electronic bulletin board 9 is displayed. Is stopped and the electric power generated by the amorphous solar cell panel 17 is stored in the storage battery.

Therefore, in the electric bulletin board device 5 for the road, the electric power is stored in the storage battery of the electric storage circuit 33 until the predetermined time elapses after the vehicle 3 passes over the two vehicle passage detection sensors 11. The generated electric power is supplied to the electronic bulletin board 9, and the large number of light-emitting bodies are caused to emit light by the electric power, so that the information for the driver of the vehicle 3 is displayed by light emission in the pattern of the characters, figures and the like. That is, the light emission display by the electronic bulletin board 9 is performed only when the vehicle 3 passes the road 1 near the road electronic bulletin board device 5, and the light emission of the electronic bulletin board 9 occurs when there is no passing vehicle 3. Since the display is not made, the electric power generated by the amorphous solar cell panel 17 can be effectively used, and in particular, the traffic of the vehicle is relatively small, such as in a mountainous area, and it is difficult to receive the electric power from the commercial power source. It is suitable to be provided at a location.

In this embodiment, the solar cell unit 15 is attached to the support panel 13, but the amorphous solar cell panel 17 and the base layer 19 have flexibility, respectively. The solar cell unit 15 may be directly attached to the peripheral surface of the pillar 7. Further, instead of the amorphous solar cell panel 17, a solar cell panel including a conventional crystalline solar cell may be attached to the support panel 13 and used. Further, as the sensor for detecting the vehicle 3 passing through the road 1, a sensor other than a pressure-sensitive sensor such as an ultrasonic sensor can be used, but in terms of power consumption and the like, in the present embodiment, It is desirable to use the pressure sensitive sensor as described above, and the passage of the vehicle 3 may be detected by a photo sensor that detects the headlight of the vehicle 3 only at night.

In this embodiment, the case where the two vehicle passage detection sensors 11 are provided at intervals in the traveling direction of the vehicle 3 has been described, but one of them may be omitted, or two of them may be omitted. Vehicle 3 between two vehicle passage detection sensors 11
The electronic bulletin board 9 for light emission display only while the vehicle 3 passes, and the time for the light emission display by the electronic bulletin board 9 is changed according to the time difference when the vehicle 3 passes the two vehicle passage detection sensors 11. CP control such as increase / decrease control
The control pattern by U39 is not limited to that shown in the present embodiment, and is arbitrary. Further, in the present embodiment, the case where the electronic bulletin board 9 is provided with a large number of light emitters arranged according to the pattern of characters, figures, etc. to be displayed has been described. To form an electronic bulletin board, correspondingly store a plurality of display patterns in a memory, select one display pattern in the memory to cause the electronic bulletin board to emit light, and the like. The configurations of the electronic bulletin board and the control system are not limited to those shown in this embodiment, and are arbitrary.

[0016]

As described above, according to the present invention, an electronic bulletin board arranged near a roadway for displaying information on vehicles passing through the roadway, and a solar cell arranged near the electronic bulletin board. A power supply circuit that stores electric power generated by the solar cell and that supplies the stored electric power to the electronic bulletin board; a passing vehicle detection sensor that detects a vehicle passing through the road; and a passing vehicle detection sensor. A control means for controlling the supply of electric power from the power supply circuit to the electronic bulletin board based on the detection result is provided. Therefore, the place where the traffic of the vehicle is relatively small and the power supply from the commercial power supply is difficult to receive. However, the electric bulletin board can be operated by effectively utilizing the electric power generated by the solar cell.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an electric bulletin board device for a road according to an embodiment of the present invention.

FIG. 2 is a sectional front view of the amorphous solar cell panel shown in FIG.

3 is a block diagram showing a schematic configuration of a control system of the electric bulletin board device for a road shown in FIG.

[Explanation of symbols]

 1 Roadway 3 Vehicle 5 Road Electric Bulletin Board Device 9 Electric Bulletin Board 11 Vehicle Passage Detection Sensor 15 Solar Cell Unit 33 Storage Circuit (Power Supply Circuit) 39 CPU (Control Means)

Claims (2)

[Claims] 1. An electronic bulletin board arranged near a roadway for displaying information on vehicles passing through the roadway; a solar cell arranged near the electronic bulletin board; and electric power generated by the solar cell. A power supply circuit for storing and storing the stored power to the electronic bulletin board, a passing vehicle detection sensor for detecting a vehicle passing through the road, and a detection result of the passing vehicle detection sensor, based on the power supply circuit, A road electric bulletin board device comprising: a control unit that controls the supply of electric power to the electric bulletin board. 2. The electric bulletin board device for a road according to claim 1, wherein the passing vehicle detection sensor is constituted by a pressure-sensitive sensor laid on the roadway.