JP3296429B2 - Traffic signal light abnormality display detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting an abnormal display of a traffic signal light, and more particularly, to a method of simultaneously displaying a plurality of traffic signal lights intersecting each other which cannot be simultaneously turned on. The present invention relates to a method and an apparatus for detecting an abnormal display of a traffic signal light, which detects this as an abnormal display when the operation is performed.

[0002]

2. Description of the Related Art Conventionally, at intersections where roads traveling in different directions intersect, a traffic signal controlled by a traffic signal controller has been installed in order to ensure traffic safety and a smooth traffic flow. Usually, these traffic lights are provided with blue (G), yellow (Y), and red (R) signal lights, and the display method of the signal lights (hereinafter, also referred to as present) indicates the shape of each intersection and the shape of each intersection. It depends on the traffic situation. For example, a description will be given below with reference to FIG. 2 showing a plan view of an intersection where various traffic lights are arranged, and FIG. 3 showing a current floor plan which is an example of a combination of lighting states of lamps of each traffic light in FIG. .

The intersection shown in FIG. 2 includes a road 61 in which the vehicle travels in the left-right direction (here, one direction) as viewed in the figure, and a vertical direction (in this case, the vehicle travels in the figure). (Referred to as two directions). The traffic lights installed at this intersection include 1
Blue light 1G for one-way vehicles, yellow light 1 for one-way vehicles
Y, a red lamp 1R for vehicles in one direction, an arrow lamp 1A for turning left in two directions from one direction, a blue lamp 2G for vehicles in two directions, a yellow lamp 2Y for vehicles in two directions, And a red light 2R for vehicles in two directions. The intersection has a pedestrian crossing 63 for pedestrians in two directions and a pedestrian crossing 64 for pedestrians in one direction. There are a two-way red light 2PR for crossers, a one-way blue light 1PG for crossers, and a one-way red light 1PR for crossers. The dashed line drawn at the center of the road in FIG. 2 indicates the median strips 65 and 66. FIG.
2 shows the present state of each signal lamp shown in FIG. 2 at each step. The thick solid line in FIG. 2 indicates blue light, the upper and lower double lines indicate red light, and the vertical stripe line. Is blinking blue,
The wavy line indicates the time of yellow lighting, the arrow mark indicates the time of lighting of an arrow (here, a blue arrow), and the blank portion indicates the time of non-display.

[0004] As described above, conventionally, when finding an indication at an intersection, the shape and traffic conditions of each intersection are taken into consideration.
It is necessary to create a presenting ladder diagram as shown in FIG. The point to be aware of when creating this display ladder diagram is that if the blue lights in the directions intersecting each other are turned on simultaneously, the flow from the intersecting direction will be allowed to enter the intersection. As a combination that is not generally permitted, signal control is performed so as to avoid simultaneous lighting of blue lamps (hereinafter, also referred to as GG abnormality). For this reason, in the related art, as shown in FIG. 6, for all combinations of signal lamps corresponding to the GG abnormality, the combination of the lamps that can be turned on simultaneously by each lamp combination (marked with a circle in FIG. 6) is different from that of FIG. An abnormality display detecting device that detects a GG abnormality when simultaneous lighting is impossible when simultaneous lighting is impossible (x) is used when the simultaneous lighting is impossible (x mark in the figure). For example, FIG.
1 is a configuration diagram showing an example of a conventional abnormality display detection device 70. The abnormality display detection device 70 in FIG. 5 branches the power supply line from the power supply 71, and
After inverting a signal on the input side of an AND circuit 74, a configuration for outputting the AND result of the input signal and a lamp in the same direction (one direction) where simultaneous lighting of the blue lamp is permitted The pickup signals (1PG and 1G) of the device are connected between the resistor 72 and the AND circuit 74 via the inverters 75 and 76, respectively, and the diodes 80 and 81, respectively. Further, a pickup signal (1A) of a lamp in the same direction (two directions) where simultaneous lighting of the blue lamp is permitted.
, 2PG and 2G) are connected between a resistor 73 and an AND circuit 74 via inverters 77 to 79, respectively.
They are connected to each other via 2 to 84.
Then, when blue lamps in different directions (one direction and two directions) are simultaneously turned on (combination indicated by x in FIG. 6), for example, when 1PG and 2PG are turned on simultaneously,
When the pickup signal of 1PG becomes “L (low)” by the inverter 75, one input side of the AND circuit 74 becomes “L (low)” via the diode 80. When the 2PG pickup signal is set to “L (low)” by the inverter 78, the other input side of the AND circuit 74 is set to “L (low)” via the diode 83 on the input side of the other AND circuit 74. Therefore, the output side of the AND circuit 74 outputs “H” as a result of the logical product.
(High) "is output to detect a GG abnormality.

[0005]

However, in such a conventional abnormal display detecting device, the combination of blue lamps that are not allowed to be simultaneously turned on at intersections is different, so that the input of the AND circuit 74 shown in FIG. It is necessary to change the insertion position of the diode to be inserted on the side at each intersection, and there is a problem that the soldering work for that purpose takes time. The present invention has been made in view of the above problems,
An object of the present invention is to provide a method and an apparatus for detecting an abnormal display of a traffic signal light with high safety, which can easily change the setting of the GG abnormality according to the situation of an intersection.

[0006]

[Means for Solving the Problems]

[0007] According to the first aspect of the present invention, when a plurality of traffic lights in a traveling direction crossing each other are displayed in a combination in which simultaneous lighting is disabled, the traffic light is detected as an abnormal display. In the abnormal display detection device, in a pair of the plurality of traffic signal lights,
A first gate comprising a plurality of gates for outputting an abnormal signal for each combination when the simultaneous lighting is performed for all the combinations in which simultaneous lighting is not possible in principle;
When an abnormal signal is output from at least one of the first gates among a plurality of signals output from the gates, a second gate configured to detect this as an abnormal display, and an input side of each of the first gates. An input terminal for inputting a setting signal is provided. Of all combinations that cannot be turned on simultaneously in principle, if there is an exception that allows simultaneous lighting, And setting means for setting so that an abnormal signal is not output even when simultaneous lighting is performed by inputting a predetermined setting signal. According to this, from the first gate composed of a plurality, in a paired combination of a plurality of traffic lights,
An abnormal signal is output when simultaneous lighting is performed for all combinations in which simultaneous lighting is impossible in principle, and at least one first signal among a plurality of signals output from each first gate by the second gate is output. When an abnormal signal is output from the gate, the abnormal signal is detected as an abnormal display, and if there is an exception that allows simultaneous lighting among all combinations that cannot be simultaneously turned on in principle, the setting means By inputting a setting signal to the input terminal of each first gate, the setting is made so that an abnormal signal is not output even if there is simultaneous lighting. In this way, in principle, it is possible to detect all abnormal indications, and only those whose settings have been changed are prevented from exceptionally detecting abnormal indications, so that high security can be obtained.

According to a second aspect of the present invention, in the traffic signal light abnormality display detecting device according to the second aspect, the first gate includes a combination of a plurality of traffic lights.
In principle, it is composed of AND circuits of the number corresponding to all combinations that cannot be simultaneously turned on.On the input side, an input terminal for inputting a pickup signal of each pair of traffic signal lights, and An input terminal for inputting a predetermined setting signal to be input, wherein the second gate is constituted by an OR circuit, and an input terminal for inputting all output signals from each of the first gates on an input side thereof. When an abnormal signal is output from the second gate, this is detected as an abnormal display. According to this, the first
The gate is configured by an AND circuit, and has on its input side an input terminal for inputting a pickup signal of each pair of traffic lights, and an input terminal for inputting a predetermined setting signal input from the setting means. The second gate is constituted by an OR circuit, and has an input terminal on the input side for inputting all output signals from the first gates, and an abnormal signal is output from the second gate. And this is detected as an abnormal display. For this reason, the configuration is simplified by using the logic gate, and the basic state and the exceptional state can be arbitrarily and easily set.

[0009] The invention according to claim 3 is the invention according to claim 2 or 3.
In the traffic signal light abnormality display detecting device according to the item (1), setting is performed using a dip switch as the setting means. According to this, the dip switch is inexpensive and small, so that the device does not become large, and when setting, it is necessary to use a pointed tool, so that the setting is easily changed. Don't worry about
The setting can be performed without the trouble of the conventional soldering.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of a traffic signal light abnormality display detection device 10 according to the present embodiment. 1 includes AND circuits 11 to 20 as first gates, OR circuits 21 as second gates, and DIP switches 31 to 34 as setting means.
And NAND circuits 41 to 44, and inverters 51 to 55 for inverting pickup signals from the respective blue lamps input to the AND circuits 11 to 20, and the like. In the present embodiment, in order to make the description easy to understand, a part of a setting example of the setting process of the abnormality display detecting device is shown, and the other setting process is performed in the same manner, and the description is omitted. In the present embodiment, a description will be given of a case where the present embodiment is implemented using the intersection plan view of FIG. 2 and the present floor plan of FIG. I do.

In the intersection shown in FIG. 2, a road 61 in which the vehicle travels in one direction and a road 62 in which the vehicle travels in two directions cross each other. Blue light device 1G, yellow light device 1Y for vehicles in one direction, red light device 1R for vehicles in one direction, arrow light device 1A for turning left in two directions from one direction, blue light for vehicles in two directions Vessel 2G, 2
There is a yellow light 2Y for a two-way vehicle and a red light 2R for a two-way vehicle. Further, there is a two-way pedestrian crossing 63 and a one-way pedestrian crossing 64, and a blue for pedestrians. Lamp 2PG,
There are a red light 2PR for crossers, a blue light 1PG for crossers, a red light 1PR for crossers, and the like. Then, it is assumed that the present indication at the intersection shown in FIG. 2 is determined as shown in FIG. Here, based on the present floor ladder diagram of FIG.
For all combinations of signal lamps corresponding to the GG abnormality as shown in FIG. 4, the combination of each lamp can be divided into those that can be turned on simultaneously (）) and those that cannot be turned on (X) at least. In the case where simultaneous lighting is impossible (x), when the simultaneous lighting occurs, the abnormality display detection device 10 in FIG. 1 is set to detect a GG abnormality. FIG.
The upper half and the lower half are shown for the same combination from the oblique line in the middle, and in the present embodiment, the lower half is used, and for convenience, each combination is denoted by a reference numeral ~ (10), At the corresponding position of one AND circuit 11-20
(10) is added. In addition, in this specification, "(10)" means the number 10 with a circle.

Next, the operation will be described. In the present embodiment, in principle, when there is a corresponding combination of the AND circuits 11 to 20, if there is simultaneous lighting, "H"
(H), and as a result, when at least one of the AND circuits 11 to 20 outputs “H (high)”, the OR circuit 21 outputs “H (high)”. Then, a GG abnormality is detected. The exceptional case where simultaneous lighting is permitted is, as shown in FIG. Of these, the AND circuit 16 and the AND circuit 16 are set to the OFF side by using the DIP switch 31, so that "H (high)" is sent to the AND circuits 12 and 16, respectively. Become. As a result, 1PG and 1G, or 2PG and 2G
Is turned on, “H (high)” is input to the AND circuits 12 and 16, but “L (low)” is input from the dip switch 31.
“H (high)” which is the abnormality detection signal is not output. That is, it can be set so that exceptional GG detection is not performed. In addition, as for (10) of FIG. 4, the AND circuit 17 and the AND circuit 20 of (10) are set to the ON side using the dip switches 32, 33, 34 and the NAND circuits 42, 43. As a result, “L (low)” is output, and the NAND circuits 42, 4
3 indicates “L” for AND circuits 17 and 20 respectively.
(Low) "is input as it is. As a result, when 2PG and 1A or 2G and 1A are turned on, “H (high)” is input to the AND circuits 17 and 20, and the above-described DIP switches 32, 33, and 34 and the NAND circuit Since "L (low)" is input from 42 and 43, "H (high)" which is a detection signal of GG abnormality is not output. That is, it can be set so that exceptional GG detection is not performed.

Conversely, as a principle of detecting a GG abnormality, the AND circuit 11 shown in FIG.
DIP switch 3 for AND circuit 13
2 and 33 and the NAND circuits 41 and 44 and the ON side and O
By setting them to the FF side, respectively, "L" and "H" are output, and the NAND circuit 41,
As a result of inverting "H" and "L" at the input side of 44, the AND circuits from the NAND circuits 41 and 44 respectively
“H (high)” is directly input to 11 and 13 . As a result, 1PG and 2PG, or 1PG and 2PG
When G lights up, “H (high)” is input to the AND circuits 11 and 13, and “H” is also input from the dip switches 32 and 33 and the NAND circuits 41 and 44.
(High) "is input, so that" H (high) "which is a detection signal of GG abnormality is output. That is, the principle G
It can be set to perform G abnormality detection. FIG.
For AND circuits 14, 15, 18,
By using a dip switch, a NAND circuit, and the like for 19 in the same manner as described above, it is possible to set to perform the principle GG abnormality detection. As described above, according to the present embodiment, in principle, all the GG abnormalities are detected as abnormal display using the logic gate, the dip switch, and the like.
Since abnormal display is not detected by changing the setting only in exceptional cases, high security can always be obtained. Further, according to the present embodiment, since the dip switch is used as the setting means, the apparatus can be reduced in cost and size, and there is no fear that the setting contents are easily changed.

[0014]

As described above, according to the first aspect of the present invention, an abnormal display is detected in principle, and the setting is changed only in exceptional cases. Can be obtained. According to the second aspect of the present invention, the configuration is simplified by using the logic gate, and the basic state and the exceptional state can be arbitrarily and easily set. According to the invention described in claim 3 ,
The use of DIP switches makes it possible to reduce the size and cost of the device, and when setting, it is necessary to use a sharp-pointed tool. The setting can be easily performed without any trouble such as soldering.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a traffic signal light abnormality display detection device according to the present embodiment.

FIG. 2 is a plan view of an intersection where various traffic lights are arranged.

FIG. 3 is a diagram showing a current floor plan as an example of a combination of lighting states of lamps of each traffic light in FIG. 2;

FIG. 4 is a diagram in which it is determined in the present embodiment that simultaneous lighting is possible and impossible for all combinations of signal lights corresponding to GG abnormality.

FIG. 5 is a configuration diagram illustrating an example of a conventional abnormality display detection device.

FIG. 6 is a diagram in which it is determined whether simultaneous lighting is possible or impossible for all combinations of signal lamps corresponding to a conventional GG abnormality.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Abnormal display detection apparatus, 11-20 AND circuit (1st gate), 21 OR circuit (2nd gate), 31-34 DIP switch (setting means), 41-44 NAND circuit, 51-55 inverter.

Claims (3)

(57) [Claims] 1. A plurality of communications in traveling directions crossing each other.
No. is displayed in combinations that cannot be turned on at the same time.
Communication that detects this as an abnormal display when performed
In the abnormal display detection device of the traffic light, in principle, among a pair of the plurality of traffic lights,
The same applies to all combinations that cannot be
When the lighting is performed, an abnormal signal is output for each combination.
A first gate composed of a plurality of output gates; and a plurality of signals output from the first gates.
An abnormal signal is output from at least one first gate
And a second game for detecting this as an abnormal display.
And an input terminal for inputting a setting signal to an input side of each of the first gates
All combinations that provide a child and do not allow simultaneous lighting in principle
Of the combinations, the combination that allows simultaneous lighting
In some cases, the corresponding input terminal of the first gate is
Even if there are simultaneous lighting by inputting a certain setting signal
Abnormality display inspection of traffic lights, characterized in that it comprises setting means for setting so as not to output the abnormality signal, the
Output device. 2. The first gate includes a plurality of traffic lights.
In principle, simultaneous lighting is not allowed in a pair
And the number of AND circuits corresponding to all combinations
The input side has a pickup for each pair of traffic lights.
Input terminals for inputting the loop signals, respectively,
And an input terminal for inputting a predetermined setting signal
For example, the second gate is formed of a logical OR circuit, the input side
Input all the output signals from the first gates
An input terminal, when an abnormal signal is output from the second gate,
Is detected as an abnormal display.
The traffic signal light abnormality display detection device described in the above. 3. A dip switch as said setting means.
The setting is performed by using
The traffic signal light abnormality display detection device according to 1 or 2.