JPH0540090Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a light emitting device that is attached to a road reflector installed at a sharp curve or a point with poor visibility.

(Prior art) Road reflectors are originally installed for the purpose of checking the road, oncoming vehicles, etc. that are outside of the visual field when a vehicle approaches the reflector. Many vehicles drive with their headlights pointing downwards, which makes it difficult to judge whether the lights are coming from the other side.Therefore, at night, a method of alerting drivers by making them aware of the presence of road reflectors is used. was needed. On the other hand, as a conventional solution, light emitting diodes are installed on or around the mirror surface of a road reflector, and the light emitted from the light emitting diodes spreads radially from the center of the mirror surface to confirm the installation status. (For example, Utility Model Application Publication No. 62-110312) has been proposed.

(Problems to be Solved by the Present Invention) In the above-mentioned conventional technology, a flashing function using light emitting diodes is incorporated into the road reflector, and by constantly flashing at night, the presence of the mirror is clearly indicated and the vehicle driver is alerted. In recent years, head-on collisions at night on curves with poor visibility have been occurring frequently, and merely making clear the presence of road reflectors at all times has not been sufficient to draw attention to them.

In addition, in the above technical means, since the reflector and the light emitting device are integrated, it is not possible to incorporate the device into the existing road reflector, and if it is installed, it will be necessary to replace it with a new one, which will reduce the cost. This was accompanied by difficulties in installation.

The present invention addresses these problems, and its purpose is to provide an appropriate means for notifying the presence of road reflectors, and to provide an alternative to the reality in which the light emitted from oncoming vehicles is not always reflected. The object of the present invention is to provide a light emitting device as a means.

Another object of the present invention is to provide a light emitting device that can be easily attached to an existing road reflector.

(Means for solving the problem) In order to achieve the above purpose, in this invention,
The flashing light emitting device attached to the road reflector shall not be a constant flashing system at night, but shall be a device that flashes and emits light when a vehicle approaches.In addition, two-color flashing will be used to notify when a vehicle is approaching from one side or from both sides. This method uses a color-coded method based on the color of the light.

In other words, the light emitting device includes solar cells, storage batteries,
Two-color light emitting diodes of red and yellow and a phototransistor are arranged, and the circuit configuration is such that changes in the current value flowing through the phototransistor are converted into voltage by a resistor, and the amount of change in the voltage is determined by a differential circuit.
By comparing with the reference voltage, it is determined whether a vehicle is approaching at night, and the output from the comparator is input to the OR circuit. When the output of the OR circuit reaches a high level, the oscillation circuit is activated and the inverter and The AND circuit determines whether the vehicle is approaching from one direction or from both directions and outputs a pulse signal, and the light emitting diode group consisting of a switch and two color light emitting diodes is divided into colors via the light emitting diode lighting section. It blinks due to

The above-mentioned light-emitting device consists of a device body in which a solar cell, a control circuit, and a storage battery are mounted or housed in a storage box fitted to the upper end of a pillar of a road reflector, and a light-receiving and emitting plate that can be attached to both left and right sides of the mirror body. It can be easily attached to existing road reflectors.

(Function) With the above configuration, when a vehicle approaches the road reflector from either direction at night, both groups of light emitting diodes flash in yellow, and when a vehicle approaches from both directions, The flashing light changes from yellow to red.

Furthermore, when approaching a vehicle at night, even if the vehicle's headlights are pointing downwards, by adjusting the volume of the vehicle sensor, it is possible to blink at the normally required approach distance (approximately 100 meters). It is something.

In addition, the circuit configuration according to the present invention uses a method to detect the increase in light intensity change when a vehicle approaches, so it does not malfunction even when there is a lot of external lighting, early in the morning, or at dusk. Regardless of the speed of the vehicle, appropriate timing for starting the flashing operation is maintained accordingly.

(Example) Examples will be described with reference to the drawings.

As shown in FIGS. 1 and 2, a cylindrical storage box 3 is fitted to the upper end of the column 2 of the mirror body 1, a control circuit and a storage battery are stored in the storage box 3, and a solar battery 4 is mounted on the top. A light receiving/emitting plate 7 is mounted on the mirror body 1 and has yellow and red two-color light emitting diodes 5 and a phototransistor 6 arranged on the left and right sides of the mirror body 1, respectively.
is attached with a joint fitting 8, and the light receiving/emitting plate 7 is connected to a control circuit with wiring 9.

Next, the control circuit shown in FIG. 3 includes two systems of vehicle sensor sections A and B for sensing vehicle lights, a control section C, and two systems of light emitting diode lighting sections 2.
1 and 22 and respective light emitting diode groups 25 and 26 connected thereto. Each light emitting diode group 25,
Reference numeral 26 consists of switches 23, 24 and a two-color light emitting diode 5, and the switches 23, 24 switch the connection of the output of each light emitting diode lighting section 21, 22 to either point e or point d. ,
In the following embodiment, both are connected to point d.

First, in the vehicle sensor sections A and B, a phototransistor 6 is connected to each upper stage, a volume 10 is connected to each lower stage, and a capacitor 11 and a resistor 1 are connected to the next stage.
There is a differentiation circuit consisting of 2, which differentiates the change in voltage at point a and outputs the amount of change to point b.If the voltage at point a increases, the voltage at point b increases due to that change, If the voltage at point a remains unchanged, the voltage at point b will return to 0V after a period of time determined by the capacitor 11 and resistor 12. Also, a
When the voltage at point B decreases, the voltage at point b also decreases and becomes below 0V, but because the diode 13 is connected in the opposite direction, it quickly returns to 0V. The comparator 15 compares the reference voltage set in advance by the volume 14 with the output from the differentiating circuit. If the output of the differentiating circuit is higher than the reference voltage, the output of the comparator 15 becomes high level, and if the reference voltage is higher. and the output becomes low level.

Next, the control section C consists of an oscillation circuit 18, an OR circuit 16, AND circuits 17, 19, 20, and an inverter, and when the outputs of each vehicle sensor section A and B are both low level, the output of the OR circuit 16 is low level. Therefore, the oscillation circuit 18 does not operate and the output becomes low level. As a result, the AND circuit 19,
Both outputs of 20 become low level. Furthermore, when the output of either vehicle sensor section A or B becomes high level, the output of the OR circuit 16 becomes high level, and the oscillation circuit 18 is activated. At this time, the output of AND circuit 17 becomes low level, and AND circuit 2
A pulse signal is output from 0. Further, when the outputs of the respective vehicle sensor sections A and B are both at high level, the AND circuit 17 becomes high level, and the AND circuit 19 outputs a pulse signal.

As described above, when a pulse signal is sent from the AND circuit 20, the light emitting diode lighting section 21 is activated, and the light emitting diode groups 25 and 26 blink in yellow light. Further, when a pulse signal is sent from the AND circuit 19, the light emitting diode lighting section 22 is activated.
The light emitting diode groups 25 and 26 flash red light.

Next, to explain the mode of operation according to the day/night transition in this embodiment, firstly, when the power is turned on in the daytime, there is no change in the voltage at each point a of the vehicle sensor sections A and B.
The voltage at each point b becomes 0V, and the comparator 15
Since the voltage input to the comparator 15 becomes lower than the reference voltage, the outputs of the comparator 15 both become low level. Therefore, the output of the OR circuit 16 in the control section C becomes a low level, the oscillation circuit 18 does not operate, the outputs of the AND circuits 19 and 20 become a low level, and the light emitting diode groups 25 and 26 remain turned off.

Then, when it becomes dusk, the amount of light received by the phototransistor 6 gradually decreases, and the voltage at point a gradually decreases. The voltage at point b remains at 0V since the voltage at point a changes slowly, and the output of the comparator 15 remains at a low level and does not change. Therefore, the light emitting diode groups 25 and 26 remain off.

Then, when the sun sets, when a vehicle approaches from either the A direction or the B direction, current flows through the phototransistor 6, and the voltage at point a suddenly increases. At point b, the voltage increases accordingly, and when it becomes higher than the reference voltage set by the volume 14, the output of the comparator 15 becomes high level, the output of the OR circuit 16 also becomes high level, and the oscillation circuit 18 is activated. At this time, since the output of the AND circuit 17 is at a low level, the pulse signal of the oscillation circuit 18 is outputted from the AND circuit 20. As a result, the light emitting diode lighting unit 21 is activated, and both the light emitting diode groups 25 and 26 blink with yellow light. At this time, if another vehicle approaches from the opposite direction while the vehicle is approaching, current flows to both phototransistors 6 and acts in the same manner as described above, and when the output becomes high level, the control section C
Then, the output of the AND circuit 17 becomes high level, the AND circuit 19 outputs a pulse signal, and the output of the AND circuit 20 switches to low level. Therefore, the light emitting diode groups 25 and 26 flash red light. When a vehicle passes, current no longer flows through each phototransistor 6, and the voltage at point b drops below the reference voltage, the output of each comparator 15 becomes low level, and the output of OR circuit 16 also becomes low level. As a result, the oscillation circuit 18 stops operating, and the AND circuits 19 and 20 both become low level, and the light emitting diode groups 25 and 26 are turned off.

Next, when the sun rises, the amount of light received by phototransistor 6 increases and the voltage at point a rises, but it rises very slowly, so the voltage at point b is close to 0V and lower than the reference voltage, and comparator 15 The output of light-emitting diode group 2 remains low level.
5 and 26 also remain off.

Next, when the vehicles on the road are congested or when many vehicles are running in a row, it is not necessarily necessary to blink the light emitting diode groups 25 and 26, but in such a case, the vehicle sensor section A, The change in the voltage at point a of B becomes small, the voltage at point b does not rise, and the output of comparator 15 becomes low level, so the next stage circuit does not operate and the light emitting diode groups 25 and 26 do not blink. Therefore, the results are in line with the actual traffic situation.

Next, as another embodiment of the present invention, if only the switch 23 of one light emitting diode group 25 is set to switch from point d to point e, when a vehicle approaches from both directions, the light emitting diode group 25 will The light flashes in yellow, and the opposing light emitting diode group 26 flashes in red. This implementation method can be applied to T-junctions where the priority order of road traffic is regulated, where it is not necessarily necessary to flash red on the priority side.

(Effects of the invention) This invention is a device that starts flashing when a vehicle approaches a road reflector at night, so it uses visual stimulation to confirm the presence of the road reflector and increases concentration of attention, and also emits light. This system aims to ensure safety in the event of an accident by accurately notifying the presence of a vehicle approaching from the other direction using flashing lights of different colors. Further, the present invention has the advantage that it can be easily attached to an existing road reflector, and furthermore, because it uses a flashing method when approaching, it enables miniaturization of solar cells and the like by rationalizing power usage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a light emitting device according to the present invention attached to a road reflector, FIG. 2 is a perspective view of the same from the back side, and FIG. 3 is a control circuit diagram.

Claims (1)

[Scope of utility model registration request] A road reflector equipped with solar cells and storage batteries, two-color red and yellow light-emitting diodes, and separate light-receiving and emitting plates each equipped with a photoelectric conversion element on the left and right sides of the mirror body. The element is connected to the lower stage, the volume is connected to the lower stage, and the next stage has a differentiating circuit consisting of a capacitor and a resistor, and the output of the differentiating circuit and the reference voltage are compared with a comparator and output from two vehicle sensor sections. Judging by a control section consisting of an oscillation circuit, an AND circuit, and an OR circuit, when only one of the outputs of the vehicle sensor section is at a high level, the two-color light emitting diode emits yellow light, and when both outputs are at a high level. A light-emitting device for a road reflector, characterized in that a two-color light-emitting diode is configured to flash red light.