JP2953568B2 - Oncoming vehicle approach display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oncoming vehicle approach display device which is installed on a roadside of a road with poor visibility such as a mountain road and displays a significant signal indicating the presence of an oncoming vehicle.

[0002]

2. Description of the Related Art Conventionally, on a road with a poor visibility, such as a mountain road, where a curve having a large curvature is continuous, an entrance of a road with a poor visibility is required in order to notify the approach of an oncoming vehicle and enable safe driving. A large electro-optic display panel displays a message such as "approaching oncoming vehicle" in the vicinity of a mountain road (one each for uphill and downhill).

[0003] This situation is shown in FIG. In FIG. 8, a conventional oncoming vehicle approach display device 10 includes an up detector 2.
1. Down sensor 22, controller 30, up display panel 4.
1 and a downward display panel 42. Although not shown, each section is connected by a cable for transmitting a signal.

[0004] When the up-bound sensor 21 detects a vehicle passing through the up-lane, it outputs a detection signal to the controller 30, and the controller 30 receives the detection signal and changes the display signal to a down-display display. Output to the panel 42, and the down display panel 42
In response to the display signal, an indication such as "oncoming vehicle approaching" is displayed for the driver of the vehicle passing through the down lane.

Similarly, when the down sensor 22 detects a vehicle passing through the down lane, the down sensor 22 outputs a detection signal to the controller 30.
And the controller 30 receives the detection signal,
The display signal is output to the display panel 41 for ascending, and the display panel 41 for ascending receives the display signal and displays an indication such as "oncoming vehicle approaching" for the driver of the vehicle passing through the up lane. Do.

[0006]

However, the above-mentioned conventional oncoming vehicle approach display device is often difficult to install on the road side because of the large display panel, and the driver's line of sight is inevitably upward. It was necessary to devise the installation position, for example, it had to be installed in a common location.

On the other hand, a large number of roadside display poles are installed at regular intervals on the roadside (not shown), and these roadside display poles are installed in the direction of the driver's line of sight while driving. If a significant signal can be displayed, the driver can obtain a lot of road information from the field of view while traveling.

Accordingly, an object of the present invention is to use a road-side display pole or the like of a road with poor visibility as a display unit to notify a driver of a vehicle traveling on a road with poor visibility that an oncoming vehicle is present and pay attention. An object of the present invention is to provide an oncoming-vehicle approach display device capable of prompting and assisting safe driving.

[0009]

According to the first aspect of the present invention,
An oncoming-vehicle approach display device that is installed on the roadside of a road with poor visibility and that changes the display state when a vehicle traveling in the oncoming lane exists in the installation section and when it does not exist. Are installed at the inlet and the outlet of the installation section of the second lane opposite to the first lane, and at the outlet of the second lane, and detect that the vehicle has passed each installation location. A vehicle detection unit including first, second, third, and fourth vehicle detection means, and a plurality of vehicles at predetermined positions within the installation section at positions visible to a driver of a vehicle traveling in the first lane. A first display means installed and having a plurality of display states for differentiating display states when a vehicle traveling in the second lane exists and when the vehicle traveling in the second lane does not exist, and a vehicle traveling in the second lane The above-mentioned installation A plurality of display means installed at predetermined intervals in the interval, and having a plurality of display states in order to make the display state different between when there is a vehicle traveling in the first lane and when it does not exist, A display unit provided, and based on detection signals input from the first and second vehicle detection means, determine whether or not there is a vehicle traveling in a first lane in the installation section, According to the result of the determination, control is performed so that the display state of the second display unit is made different when the vehicle traveling in the first lane is present and when the vehicle is not traveling, and the third and fourth vehicles are controlled. Based on the detection signal input from the detection means, it is determined whether there is a vehicle traveling in the second lane in the installation section, and based on the result of this determination, the vehicle traveling in the first lane Display on the first display unit when and does not exist It is characterized by comprising a control unit for controlling so as to vary the state.

According to the oncoming vehicle approach display device of the first aspect of the present invention, the vehicle is installed on the road side or the like of a road with poor visibility and indicates whether or not there is a vehicle traveling in the oncoming lane in the installation section. In the oncoming-vehicle approach display device that changes the state, the vehicle detection unit includes an inflow port and an outflow port in the installation section of the first lane, and an inflow port in the installation section of the second lane opposed to the first lane. , And outflow ports, and first, second, third, and fourth vehicle detection means for detecting that the vehicle has passed each of the installation locations,
A plurality of display units are installed at predetermined intervals in the installation section at positions where a driver of a vehicle traveling in the first lane can visually recognize the vehicle, and whether or not a vehicle traveling in the second lane exists. A first display means having a plurality of display states to make the display state different from time to time, and at a predetermined interval within the installation section at a position visible to a driver of a vehicle traveling in the second lane. A plurality of second display means having a plurality of display states for differentiating the display state between when there is a vehicle traveling in the first lane and when there is no vehicle traveling in the first lane; and Based on a detection signal input from the first and second vehicle detection means, the first vehicle in the installation section
It is determined whether or not there is a vehicle traveling in the first lane. Based on the result of this determination, the display state of the second display unit is determined depending on whether or not there is a vehicle traveling in the first lane. And determines whether or not there is a vehicle traveling in the second lane in the installation section based on the detection signals input from the third and fourth vehicle detection means. Then, based on the result of this determination, control is performed so that the display state of the first display unit is different depending on whether or not a vehicle traveling in the first lane exists.

Therefore, the driver of a vehicle traveling on a road with poor visibility, such as a mountain road, is informed that an oncoming vehicle is present no matter where the vehicle is traveling on a road with poor visibility. It is possible to provide an oncoming-vehicle approach display device capable of prompting and assisting safe driving.

Further, since the display can be performed by using a small-sized display as the display, the display can be driven with lower power consumption than a conventional electro-optical display panel or the like.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An oncoming vehicle approaching display device 1 according to an embodiment of the present invention will be described below in detail with reference to FIGS.

First, the configuration will be described. FIG. 1 is a diagram showing a schematic circuit configuration of an oncoming vehicle approach display device 1, and FIG.
FIG. 3 is an external front view of the controller 3, and FIG. 4 is a schematic perspective view showing that a display 4 is provided on a display pole 5.

FIG. 5 is a diagram showing a state where the oncoming vehicle approach display device 1 according to the embodiment of the present invention is applied to a mountain road with poor visibility. In FIG. 5, illustration of cables for connecting the respective components is omitted.

In FIG. 1, an oncoming vehicle approaching display device 1 comprises:
It comprises a vehicle sensing unit 2, a controller 3, a display 4 (not shown), and a display pole 5 (not shown).

The vehicle sensor 2 further includes an inflow sensor 20.
1. It is composed of an outflow side sensor 202, an inflow side sensor 203, and an outflow side sensor 204, and is a part that detects and detects a vehicle passing through a road at an installation location.

Inflow sensor 201, outflow sensor 20
2. The inflow side sensor 203 and the outflow side sensor 204
As shown in FIG. 2, the sensor head 2a and the sensor body 2
b, and a cable 2c, and the sensor head 2a is disposed in the air on the lane by an iron pole or the like installed on the road side, and detects the upper surface of the passing vehicle by, for example, an ultrasonic signal. The sensor main body 2b analyzes a signal indicating that the vehicle is detected by the sensor head 2a and outputs it to the controller 3 as a detection signal, and the cable 2c
The sensor head 2a is connected to the sensor body 2b.

As shown in FIG. 5, on the upstream side, the inflow side sensor 201 is installed at the inflow side entrance of the installation section of the oncoming vehicle approach display device 1, and the outflow side sensor 202 is provided.
Is installed at the outlet on the ascending side of the installation section of the oncoming vehicle approach display device 1 and, every time a vehicle is detected by sensing with the sensor head 2a, a detection signal generated by the sensor body 2b is transmitted to the controller 3 Are output to the count storage circuit 301 and the count storage circuit 302.

Similarly, as shown in FIG. 5, on the downstream side, the inflow-side sensor 203 is installed at the downstream inflow port of the installation section of the oncoming-vehicle approach display device 1, and the outflow-side sensor 204 is provided. Is installed at the outlet on the downside of the installation section of the oncoming vehicle approach display device 1 and, every time a vehicle is detected by sensing with the sensor head 2a, the detection signal generated by the sensor body 2b is transmitted to the controller 3 Are output to the count storage circuit 311 and the count storage circuit 312 in the table.

As shown in FIG. 1, the controller 3 includes count storage circuits 301 and 302, a reset timer 303, a vehicle presence determination circuit 304, a display reset circuit 305, a downward display drive circuit 306, count storage circuits 311, 3
12, reset timer 313, vehicle presence determination circuit 3
14, a display reset circuit 315, and an upward display drive circuit 316, and is a part that receives a detection signal from the vehicle sensing unit 2 and controls a signal to be displayed on the display 4.

The controller 3 is housed in, for example, a metal container as shown in an external front view of FIG. 3, and is controlled by weather conditions (wind, rain, temperature, etc.), dust, or artificial causes. The internal circuit is protected from malfunctioning due to the influence, and as shown in FIG. 5, it is installed on the road side of the installation section of the oncoming vehicle approach display device 1 such as a mountain road with poor visibility.

In order to detect the oncoming vehicle and notify the oncoming vehicle of the oncoming vehicle, the count storage circuits 301 and 302 count up based on the inflow detection signal input from the inflow sensor 201. The operation is performed, and a countdown operation is performed based on the outflow detection signal input from the outflow side sensor 202, the count value counted by these operations is stored internally, and output to the vehicle presence determination circuit 304. When a reset signal is input from the reset timer 303, the count storage circuits 301 and 302 return the count value to “0” and reset.

The reset timer 303 stores the correct count value in the count storage circuit 301 and the count storage circuit 302 because the vehicle was not correctly detected by the inflow sensor 201 or the outflow sensor 202 for some reason. In order to avoid displaying an erroneous signal on the display 4 without being able to perform the operation, the count storage circuit 301,
And a reset signal to the count storage circuit 302.

The vehicle presence determination circuit 304 is stored in the count storage circuit 301 and the count storage circuit 302. When the count value input to the vehicle presence determination circuit 304 is "0", the oncoming oncoming vehicle on the upside is determined. If the count value is not "0", that is, if there is no oncoming vehicle on the upside, a signal for controlling the down display drive circuit 306 is generated and output to the down display drive circuit 306.

The downward display drive circuit 306 is controlled by a control signal input from the vehicle presence determination circuit 304, and outputs a signal for controlling display by the display 4 not shown in FIG. . That is, as shown in FIG. 4, a display drive signal for inverting the front and back surfaces of the display 4 provided on the display pole 5 at a constant period is output to the display 4.
Output to

The display reset circuit 305 is connected to the display 4
A display reset signal for controlling the downward display drive circuit 306 so as to reset (stop the inversion) the significant signal displayed on the display 4 by a display drive signal for inverting the front and back surfaces of the display device at a fixed cycle. Is output to the downward display drive circuit 306.

The count storage circuits 311 and 312 count up based on the inflow detection signal input from the inflow side sensor 203 in order to detect the vehicle on the downside and notify the oncoming vehicle of the presence of the oncoming vehicle. The operation is performed, and a countdown operation is performed based on the outflow detection signal input from the outflow side sensor 204, the count value counted by these operations is stored internally, and output to the vehicle presence determination circuit 314. When a reset signal is input from the reset timer 313, the count storage circuits 311 and 312 return the count value to “0” and reset.

The reset timer 313 stores the correct count value in the count storage circuit 311 and the count storage circuit 312 because the vehicle was not correctly detected by the inflow sensor 203 or the outflow sensor 204 for some reason. In order to avoid displaying an erroneous signal on the display 4 without being able to perform the operation, the count storage circuit 311,
And a reset signal to the count storage circuit 312.

The vehicle presence determination circuit 314 is stored in the count storage circuit 311 and the count storage circuit 312. When the count value input to the vehicle presence determination circuit 314 is "0", the oncoming vehicle on the upside is determined. If the count value is not "0", that is, if there is no oncoming vehicle on the up side, a signal for controlling the up direction display drive circuit 316 is generated and output to the up direction display drive circuit 316.

The upward display drive circuit 316 is controlled by a control signal input from the vehicle presence determination circuit 314, and outputs a signal for controlling display on the display 4 not shown in FIG. . That is, as shown in FIG. 4, a display drive signal for inverting the front and back surfaces of the display 4 provided on the display pole 5 at a constant period is output to the display 4.
Output to

The display reset circuit 315 is connected to the display 4
A display reset signal for controlling the upward display drive circuit 316 so as to reset (stop the inversion) a significant signal displayed on the display 4 by a display drive signal for inverting the front and back surfaces of the display device at a constant period. Is output to the upward display drive circuit 316.

As shown in FIG. 4, the display device 4 has a reflective plate of a color that can be recognized as a color that is clearly different from the surface, such as a white reflective plate on the front surface and a yellow or red color on the back surface, for example. It is provided at the upper end portion of the display pole 5 as a reversible or rotatable mechanism such as a magnetic reversing type, and together with the display pole 5, as shown in FIG. The vehicle approach display device 1 is installed at regular intervals on the road side over the entire installation section.

Indicator 4 installed on the road side of the down lane
Although not shown in FIG. 1, D is driven and controlled by a display drive signal input from a downward display drive circuit 306 in the controller 3, and when there is an oncoming oncoming vehicle, a white reflector on the surface, By inverting the yellow or red reflecting plate on the back surface at a fixed cycle to change the display color, the driver of the vehicle traveling on the down lane is notified of the presence of the oncoming vehicle.

Similarly, although not shown in FIG. 1, the display 4U installed on the road side of the up lane is driven and controlled by a display drive signal input from an up display drive circuit 316 in the controller 3. When there is an oncoming vehicle on the downside, the vehicle travels in the upside lane by changing the display color by inverting the white reflector on the front surface and the yellow or red reflector on the back at regular intervals. Notify the driver of the vehicle of the oncoming vehicle.

When there is no oncoming vehicle, the display 4 keeps the display stationary on the front side and performs the same function as a normal roadside display pole.

The display pole 5 is a pillar having a shape as shown in FIG. 4, for example.
Alternatively, as a column supported as a rotatable mechanism, a display pole for displaying a signal indicating the presence of an oncoming vehicle on the indicator 4 as described above, and as shown in FIG. It is installed at a fixed interval on the road side over the entire section of the approach display device 1 installation section. The display pole 5 is, similarly to a roadside display pole conventionally provided on the roadside, an indicator provided with a reflector when the driver is difficult to judge the degree of curvature of the road at night or in a dark place. 4 also has the function of reflecting the headlights of the running vehicle so as to clearly indicate the traveling direction of the road to the driver.

Next, the operation will be described. First, in FIG. 5, a case will be described in which one vehicle passes through an up lane from downhill.

When a vehicle traveling in the up lane is detected and detected by the sensor head 2a of the inflow sensor 201 installed at the inflow port on the ascending side, the sensor body of the inflow sensor 201 is detected. From 2b, the inflow detection signal is output to the count storage circuit 301 and the count storage circuit 302 in the controller 3.

Then, the count storage circuits 301 and 302
Performs a count-up operation based on the inflow detection signal input from the inflow-side sensor 201, stores the count value “1” therein, and outputs the count value “1” to the vehicle presence determination circuit 304.

Since the count value input from the count storage circuit 301 is "1", the vehicle presence determination circuit 304 determines that there is an oncoming vehicle on the upside, and the display 4 indicates the presence of the oncoming vehicle. A signal for controlling the downward display drive circuit 306 so as to perform reverse display is generated and output to the downward display drive circuit 306.

Upon receiving the control signal input from the vehicle presence determination circuit 304, the downward display drive circuit 306
A display drive signal for inverting the front and back surfaces of the display 4 provided on the display pole 5 at a constant period is output to the display 4.

Indicator 4 installed on the road side of the down lane
D is drive-controlled by a display drive signal input from a downward display drive circuit 306 in the controller 3 for inverting the front and back surfaces of the display unit 4 at a fixed period, and the white reflection plate on the front surface and the back surface By inverting the yellow or red reflector at a fixed cycle to change the color of the display, the driver of the vehicle traveling in the down lane is notified of the presence of the oncoming vehicle.

The vehicle traveling in the up lane and passing through the inflow sensor 201 is further detected and detected by the sensor head 2a of the outflow sensor 202 installed at the upflow outlet. Then, an outflow detection signal is output from the sensor main body 2b of the outflow side sensor 202 to the count storage circuit 301 and the count storage circuit 302 in the controller 3.

Then, the count storage circuits 301 and 302
Performs a countdown operation based on the outflow detection signal input from the outflow side sensor 202, stores the count value “0” therein, and outputs the count value “0” to the vehicle presence determination circuit 304.

Since the count value input from the count storage circuit 301 is "0", the vehicle presence determination circuit 304 determines that there is no oncoming vehicle on the upside, and the display 4 indicates that there is no oncoming vehicle. A signal for controlling the downward display drive circuit 306 to perform display is generated and output to the downward display drive circuit 306.

In response to the control signal input from the vehicle presence determination circuit 304, the downward display drive circuit 306
A display drive signal for statically displaying the surface of the display 4 provided on the display pole 5 is output to the display 4.

Indicator 4 installed on the road side of the down lane
D is driven and controlled by a display drive signal that is input from the downward display drive circuit 306 in the controller 3 and that causes the surface of the display 4 to be statically displayed, and displays the white reflector on the surface statically, Inform the driver of a vehicle traveling in the down lane that there is no oncoming vehicle.

The above is the description of the operation of the oncoming vehicle approaching display device 1 when one vehicle passes through the up lane from downhill. The same applies to the case where one vehicle passes through the down lane from the hill.

Next, based on this operation, a case where the vehicle passes through both the up and down lanes will be described. Here, a vehicle traveling in the up lane from the downhill passes below the inflow sensor 201 installed at the inflow port on the upside, and then a vehicle traveling in the down lane from the uphill to the downside. A case in which the vehicle passes below the inflow-side sensor 203 installed at the inflow port will be described.

When the vehicle traveling in the up lane is detected and detected by the sensor head 2a of the inflow sensor 201 installed at the inflow port on the up side, the down lane is operated by the above-described operation. 4D installed on the roadside
Is driven and controlled by a display drive signal input from a downward display drive circuit 306 in the controller 3 for inverting the front and back surfaces of the display unit 4 at a fixed cycle, and the white reflector on the front surface and the back surface The display color is changed by inverting the yellow or red reflector at a constant cycle, thereby notifying the driver of the vehicle running on the down lane of the oncoming vehicle.

The driver of the vehicle traveling on the down lane from the hill sees the reverse display on the display 4D, and knows that there is an oncoming vehicle traveling on the up lane, so as not to protrude from the down lane. Do safe driving such as slowing down.

When the vehicle traveling in the down lane is detected and detected by the sensor head 2a of the inflow side sensor 203 installed at the down stream inlet,
By the above-described operation, the display 4U installed on the road side of the up lane causes the up display display drive circuit 31 in the controller 3 to operate.
6 is driven and controlled by a display driving signal for inverting the front and back surfaces of the display unit 4 at a constant period, and inverts the white reflector on the front surface and the yellow or red reflector on the back surface at a constant period. By changing the color of the display, the driver of the vehicle traveling on the up lane is notified of the oncoming vehicle.

At this time, the vehicle traveling on the up lane passes under the inflow sensor 201 and is traveling on a mountain road or the like with poor visibility. The driver of the vehicle that is watching the inverted display on the display 4U knows that there is an oncoming vehicle traveling in the down lane,
Do safe driving such as slowing down so as not to go out of the up lane.

The vehicle traveling in the up lane and passing through the inflow sensor 201 is further detected and detected by the sensor head 2a of the outflow sensor 202 installed at the outflow port on the ascending side. Then, by the operation described above,
The display 4D installed on the road side of the down lane is driven and controlled by a display drive signal input from the down display drive circuit 306 in the controller 3 to display the surface of the display 4 in a stationary manner. By displaying the white reflector on the surface stationary, the driver of the vehicle traveling on the down lane is notified that there is no oncoming vehicle.

Similarly, the vehicle traveling in the down lane and passing through the inflow sensor 203 is further detected and detected by the sensor head 2a of the outflow sensor 204 installed at the downflow outlet. Then, by the operation described above,
The display 4U installed on the road side of the up lane is driven and controlled by a display drive signal input from the ascending display drive circuit 316 in the controller 3 for statically displaying the surface of the display 4, and By displaying the white reflector on the surface stationary, the driver of the vehicle traveling in the up lane is notified that there is no oncoming vehicle.

As described above, the vehicle traveling in the ascending lane from the bottom of the hill is moved by the inflow sensor 20 installed at the inflow port on the ascending side.
After passing under the vehicle 1, the vehicle traveling down the lane from the hill is replaced by the inflow sensor 20 installed at the downflow inlet.
3 is a description of a case in which the vehicle passes under No. 3.

Referring to FIG. 5, a case will be described in which two vehicles successively pass through the up lane from the bottom of a hill.

The first vehicle traveling in the up lane is
When detected and detected by the sensor head 2a of the inflow-side sensor 201 installed at the inflow port on the ascending side, an inflow detection signal from the sensor main body 2b of the inflow-side sensor 201 is output from the controller 3 Output to the count storage circuit 301 and the count storage circuit 302.

Then, the count storage circuits 301 and 302
Performs a count-up operation based on the inflow detection signal input from the inflow-side sensor 201, stores the count value “1” therein, and outputs the count value “1” to the vehicle presence determination circuit 304.

Thereafter, the display 4D installed on the road side of the down lane is operated by the same operation as the above-described operation when only one vehicle is used, and the down display driving circuit 3 in the controller 3 is provided.
Drive control is carried out by a display drive signal inputted from 06, which inverts the front and back surfaces of the display 4 at a constant cycle, and inverts the white reflector on the front face and the yellow or red reflector on the back face at a constant cycle. By changing the color of the display
It informs the driver of the vehicle traveling in the down lane of the oncoming vehicle.

Further, a second vehicle traveling in the up lane is connected to the inflow side sensor 201 installed at the inflow port on the up side.
Is detected and detected by the sensor head 2a, the inflow detection signal is output from the sensor main body 2b of the inflow side sensor 201 to the count storage circuit 301 and the count storage circuit 302 in the controller 3. Is done.

Then, the count storage circuits 301 and 302
Performs a count-up operation based on the inflow detection signal input from the inflow-side sensor 201, stores the count value “2” therein, and outputs the count value “2” to the vehicle presence determination circuit 304.

Since the count value input from the count storage circuit 301 is "2", the vehicle presence determination circuit 304 determines that there is an oncoming vehicle on the upside and the display 4
, A signal for controlling the downward display drive circuit 306 is generated so as to cause the reverse display of the front and back surfaces indicating that there is an oncoming vehicle, and the signal is continuously output to the downward display drive circuit 306.

Thereafter, by the same operation as the above-described operation when only one vehicle is used, the display 4D installed on the road side of the down lane still outputs the down display driving circuit 306 in the controller 3. The display is continuously controlled by a display drive signal input from the display drive signal for inverting the front and back surfaces of the display 4 at a constant cycle, and the white reflector on the front surface and the yellow or red reflector on the back surface are inverted at a constant cycle. By changing the color of the display, the driver of the vehicle traveling in the down lane is kept informed of the oncoming vehicle.

The first vehicle traveling in the up lane and passing through the inflow sensor 201 is further sensed by the sensor head 2a of the outflow sensor 202 installed at the upflow outlet. When detected and detected, an outflow detection signal is output from the sensor main body 2b of the outflow side sensor 202 to the count storage circuit 301 and the count storage circuit 302 in the controller 3.

Then, the count storage circuits 301 and 302
Performs a countdown operation based on the outflow detection signal input from the outflow side sensor 202, stores the count value “1” therein, and outputs the count value “1” to the vehicle presence determination circuit 304.

Since the count value input from the count storage circuit 301 is "1", the vehicle presence determination circuit 304 determines that there is an oncoming vehicle on the upside and the display 4
, A signal for controlling the downward display drive circuit 306 is generated so as to cause the reverse display of the front and back surfaces indicating that there is an oncoming vehicle, and the signal is continuously output to the downward display drive circuit 306.

Thereafter, by the same operation as the above-described operation when only one vehicle is used, the display 4D installed on the road side of the down lane still outputs the down display driving circuit 306 in the controller 3. The display is continuously controlled by a display drive signal input from the display drive signal for inverting the front and back surfaces of the display 4 at a constant cycle, and the white reflector on the front surface and the yellow or red reflector on the back surface are inverted at a constant cycle. By changing the color of the display, the driver of the vehicle traveling in the down lane is kept informed of the oncoming vehicle.

The second vehicle traveling in the up lane and passing through the inflow sensor 201 is further detected by the sensor head 2a of the outflow sensor 202 installed at the upflow outlet. When detected and detected, an outflow detection signal is output from the sensor main body 2b of the outflow side sensor 202 to the count storage circuit 301 and the count storage circuit 302 in the controller 3.

Then, the count storage circuits 301 and 302
Performs a countdown operation based on the outflow detection signal input from the outflow side sensor 202, stores the count value “0” therein, and outputs the count value “0” to the vehicle presence determination circuit 304.

Since the count value input from the count storage circuit 301 is “0”, the vehicle presence determination circuit 304 determines that there is no oncoming vehicle on the upside, and the display 4 indicates that there is no oncoming vehicle. A signal for controlling the downward display drive circuit 306 to perform display is generated and output to the downward display drive circuit 306.

In response to the control signal input from the vehicle presence determination circuit 304, the downward display drive circuit 306
A display drive signal for statically displaying the surface of the display 4 provided on the display pole 5 is output to the display 4.

Indicator 4 installed on the road side of the down lane
D is driven and controlled by a display drive signal that is input from the downward display drive circuit 306 in the controller 3 and that causes the surface of the display 4 to be statically displayed, and displays the white reflector on the surface statically, Inform the driver of a vehicle traveling in the down lane that there is no oncoming vehicle.

That is, when the number of passing vehicles is two (or more), the operation of continuously displaying the signal indicating that there is an oncoming vehicle on the display 4 is performed until all the vehicles have passed through the outlet.

The above is the description of the operation of the oncoming vehicle approach display device 1 when two vehicles successively pass through the ascending lane from downhill. The same applies to a case where two vehicles successively pass down a lane from hill.

Further, even when two or more vehicles pass, the above-described operation is basically performed, and when a plurality of vehicles pass on both the ascending lane and the descending lane, the above-described ascending lane from the hill. After the vehicle traveling on the vehicle passes under the inflow-side sensor 201 installed at the inflow port on the ascending side, the vehicle traveling on the down lane from uphill is installed at the inflow port on the downside. The operation is based on the operation described for the case of passing under the inflow-side sensor 203.

In the above description, the display 4 is a reversible or rotatable mechanism such as a magnetic reversal type. However, a special liquid crystal glass 401 as shown in FIG. 6 may be employed. In this case, when the special liquid crystal glass 401 is energized by a control signal input to the display 4 from the down display drive circuit 306 or the up display drive circuit 316, the special liquid crystal glass 4
Numeral 01 is transparent, and the light is reflected by a reflection plate 402 disposed on the back wall viewed from the viewing direction. When the special liquid crystal glass 401 is not energized, it becomes opaque like cloudy glass. The change of the two states replaces the display of the significant signal by the mechanism such as the magnetic reversal method.

In the above description, the indicator 4 is provided on the display pole 5 and is installed at a fixed interval on the road side in the same manner as the road side display pole. When it is difficult to install the display pole 5 or when the display pole 5 cannot be installed due to the deterioration of the beauty of the vicinity, the display pole 5 may be installed on the center line of the road. 7 may be changed and installed. That is, FIG.
, 6U is an indicator for the up lane, 6D is an indicator for the down lane, 7 is an indicator protection container for protecting the indicator, and is the same as the indicator 4 described above except that the shape is changed.
When there is an oncoming vehicle traveling in the down lane, the display device 6U for the up lane performs an operation such as displaying a significant signal to the driver of the vehicle traveling in the up lane.

In addition, it goes without saying that the shape of the display unit, the installation place, and the like can be arbitrarily changed without departing from the spirit of the present invention.

When there is a fork in the section where the oncoming vehicle approach display device is installed, such as a mountain road with poor visibility, the inflow sensor and the outflow sensor at the inlet and outlet of the fork are also provided. Are installed in the lane in each direction, and a detection signal detected by detecting a vehicle passing through the branch road is output to the controller 3.

As described above, according to the oncoming vehicle approach display device 1 of the present embodiment, the vehicle detector 2 includes the inflow side sensor 201, the outflow side sensor 202, and the inflow side sensor 20.
3, and the outflow side sensor 204,
The inflow and outflow of vehicles in both directions passing through the road at the installation location are sensed and detected, and the count storage circuit in the controller 3 performs a count-up operation based on the inflow detection signal input from the inflow-side sensor. In addition, a countdown operation is performed according to the outflow detection signal input from the outflow side sensor. When the count value is counted by these operations and the count value input to the vehicle presence determination circuit is “0”, the up (down) is performed. Assuming that there is no oncoming vehicle, the count value is "
When it is not 0 ", it is determined that there is an oncoming vehicle on the up (down) side, a signal for controlling the down (up) direction display drive circuit is generated, and the down (up) direction display drive circuit is inputted from the vehicle presence determination circuit. A display drive signal, which is controlled by a control signal to invert the front and back surfaces of the display 4 provided on the display pole 5 at a constant period, to the display 4;
The display 4 installed on the road side is driven and controlled by a display drive signal input from a down (up) direction display drive circuit, and when there is an oncoming vehicle on the up (down) side, a white reflector on the surface, and By inverting the yellow or red reflector on the back surface at a fixed cycle to change the color of the display, the driver of the vehicle traveling in the down (up) lane is notified of the oncoming vehicle.

Therefore, the driver of a vehicle traveling on a road with poor visibility such as a mountain road is informed that an oncoming vehicle is present no matter where the vehicle is traveling on a road with poor visibility. It is possible to provide an oncoming-vehicle approach display device capable of prompting and assisting safe driving.

Also, a mechanism such as a magnetic reversal type is used as a display,
Alternatively, by using a special liquid crystal glass or the like for display, the display can be driven with lower power consumption than a conventional electro-optical display or the like.

[0085]

According to the oncoming vehicle approach display device according to the first aspect of the present invention, the driver of a vehicle traveling on a road with poor visibility such as a mountain road can travel to any position on the road with poor visibility. It is possible to provide an oncoming-vehicle approach display device capable of informing that an oncoming vehicle is present and alerting the driver to assist safe driving even when the vehicle is inside.

Further, since the display can be performed by using a small-sized display as the display, the display can be driven with lower power consumption than a conventional electro-optical display panel or the like.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic circuit configuration of an oncoming vehicle approach display device 1. FIG.

FIG. 2 is a diagram showing a main configuration of a vehicle sensing unit 2.

FIG. 3 is an external front view of the controller 3;

FIG. 4 is a schematic perspective view showing that a display device is provided on a display pole.

FIG. 5 is a diagram illustrating a state in which the oncoming vehicle approach display device 1 according to the embodiment of the present invention is applied to a mountain road with poor visibility.

FIGS. 6A and 6B are a perspective view and a side view showing a case where a special liquid crystal glass 401 is adopted as the display 4. FIGS.

FIG. 7 is a view showing a state in which a display 6U for an up lane, a display 6D for a down lane, and a display protection container 7 are installed on a center line as an alternative to the display pole 5.

FIG. 8 is a diagram illustrating a state in which the conventional oncoming vehicle approach display device 10 is applied to a mountain road with poor visibility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oncoming vehicle approach display device 2 Vehicle sensor 201 Inflow sensor 202 Outflow sensor 203 Inflow sensor 204 Outflow sensor 2a Sensor head 2b Sensor body 2c Cable 3 Controller 301 Count storage circuit 302 Count storage Circuit 303 Reset timer 304 Vehicle presence determination circuit 305 Display reset circuit 306 Downward display drive circuit 311 Count storage circuit 312 Count storage circuit 313 Reset timer 314 Vehicle presence determination circuit 315 Display reset circuit 316 Upward display drive circuit 4 Display Reference Signs 5 Display pole 401 Special liquid crystal glass 402 Reflector 6U Display for up lane 6D Display for down lane 7 Display protection container 10 Oncoming vehicle approaching display device 21 Up sensor 22 Down sensor 30 Controller 41 Up Display Panel 42 Display panel for descending

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Claims (1)

(57) [Claims] An oncoming-vehicle approach display device installed on a roadside or the like of a road with poor visibility and having a different display state when a vehicle traveling in an oncoming lane in the installation section exists or not. Inflow and outflow of the installation section of the lane, first
An inlet of the installation section of the second lane opposite to the lane of
And a vehicle detection unit provided with first, second, third, and fourth vehicle detection means for detecting that the vehicle has passed each of the installation locations, and the first lane. A plurality of vehicles are installed at predetermined intervals in the installation section at positions where the driver of the vehicle traveling on the vehicle can visually recognize the vehicle, and the display state is different depending on whether or not a vehicle traveling in the second lane exists. A plurality of first display means having a plurality of display states, and a plurality of first display means provided at predetermined intervals within the installation section at positions which can be visually recognized by a driver of a vehicle traveling in the second lane; A second display unit having a plurality of display states so as to make the display state different when a vehicle traveling exists and when the vehicle does not exist; and the first and second vehicle detection units. Based on the detection signal input from It is determined whether or not there is a vehicle traveling in the first lane in the installation section, and based on the result of this determination, it is determined whether or not there is a vehicle traveling in the first lane. There is a vehicle running in the second lane within the installation section based on the detection signals input from the third and fourth vehicle detection means, so that the display state of the display section is made different. Control to determine whether or not there is a vehicle running in the first lane, based on the result of the determination, and to control the display state of the first display unit to be different depending on whether or not there is a vehicle traveling in the first lane. And an oncoming vehicle approaching display device, comprising: