JP2006268547A - Traffic signal controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traffic signal controller having a plurality of step counters in a signal control circuit, independently controlling uplink and downlink signals, and controlling the signals in real time according to a traffic condition of each road crossing at an intersection. <P>SOLUTION: The traffic signal controller is provided with; an operation level determination circuit 4, a CPU interface circuit 5, timer circuits (N)6 and (S)8 for setting a unit time of a step, a clock circuit 7, step counter circuits (N)9 and (S)10 for counting the steps based on a step signal, a step synchronization circuit 11 for synchronizing the step signals generated from each step counter circuit, an aspect memory reading circuit 12 for reading data in an aspect memory 3, a GG determination circuit 13 for forcibly changing the lighting color of a signal light when detecting signal light data principally prohibiting simultaneous lighting, and a lighting color output circuit 15 for lighting a signal light based on the lighting data stored in the aspect memory 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a traffic signal controller, and more particularly to a signal control circuit that individually controls uplink and downlink signal control.

Current Japanese road traffic signal control is performed by a step control method in which a signal lamp is switched for each step based on a step signal output at a predetermined pitch from a step signal generator. This step control method can be said to be a very excellent method in terms of safety because the change of the step signal is performed serially in units of steps.
Further, the signal control circuit of the signal controller has a double configuration of a CPU 52 and an LSI 51 as shown in FIG. That is, the LSI 51 includes an operation level determination circuit 54 that monitors the internal operation of the LSI, a CPU interface circuit 55 that matches the interface with the CPU 52, a timer circuit 56 that sets a unit time for steps, and a clock that drives the timer circuit 56. A clock circuit 57 for generating a signal, a step counter circuit 59 for counting the number of steps based on a step signal generated from the CPU 52, and a display memory reading circuit 58 for reading data of the display memory 53 are configured. The The display memory 53 stores lamp color data for lighting the signal lamp unit in correspondence with the step signal.

FIG. 8 is a current floor plan for explaining the operation of the conventional single step count method. The horizontal axis indicates the number of steps, and the vertical axis indicates each signal name. The flowchart of each signal is shown in the same figure. Here, a thick black line indicates that the traffic light is blue, a vertical line indicates blinking, a corrugation indicates that the traffic light is yellow, an arrow indicates that it can proceed in the direction of the arrow, The line indicates that the traffic light is red. 1P and 2P indicate pedestrian traffic lights, S1 and S2 indicate vehicle traffic lights, and 1A and 2A indicate vehicle arrow traffic lights.
Next, the operation of the single step count method will be described with reference to FIG. 8. For further clarity, the operation will be described with reference to the schematic diagram of the intersection in FIG. The same constituent elements will be described with the same reference numerals. First, in step 1, the pedestrian traffic light 1P and the vehicle traffic light S1 are blue, the vehicle arrow traffic lights 1A and 2A are unlit, and the pedestrian traffic light 2P and the vehicle traffic light S2 are red. That is, the pedestrians 20 and 22 can travel by the traffic light 1P, and the vehicles 26 and 30 can also travel by the traffic light S1. Next, in step 2, the pedestrian traffic light 1P blinks, the vehicle traffic light S1 is blue, the vehicle arrow traffic lights 1A, 2A are unlit, and the pedestrian traffic light 2P and the vehicle traffic light S2 are red. That is, the pedestrians 20 and 22 are alerted by the traffic light 1P, and the vehicles 26 and 30 can travel by the traffic light S1. Next, in Step 3, the pedestrian traffic light 1P is red, the vehicle traffic light S1 is blue, the vehicle arrow traffic lights 1A and 2A are unlit, and the pedestrian traffic light 2P and the vehicle traffic light S2 are red. That is, the pedestrians 20 and 22 are stopped by the traffic light 1P, and the vehicles 26 and 30 can travel by the traffic light S1. Next, in step 4, the pedestrian traffic light 1P is red, the vehicle traffic light S1 is blinking, the vehicle arrow traffic lights 1A, 2A are unlit, and the pedestrian traffic light 2P and the vehicle traffic light S2 are red. That is, the pedestrians 20 and 22 are stopped by the traffic light 1P, and the vehicles 26 and 30 are alerted by the traffic light S1. Next, in step 5, the pedestrian traffic light 1P is red, the vehicular traffic signal S1 is red, the vehicular arrow traffic light 1A can turn right, 2A is unlit, the pedestrian traffic light 2P and the vehicular traffic light S2 are red. Yes. That is, the pedestrians 20 and 22 are stopped by the traffic light 1P, and the vehicles 26 and 30 are stopped straight by the traffic light S1 and can turn right. Next, in step 6, the pedestrian traffic light 1P is red, the vehicle traffic light S1 is blinking, the vehicle arrow traffic lights 1A, 2A are unlit, and the pedestrian traffic light 2P and the vehicle traffic light S2 are red.

That is, the pedestrians 20 and 22 are stopped by the traffic light 1P, and the vehicles 26 and 30 are stopped straight by the traffic light S1 and are warned to turn right. Next, in step 7, all the traffic lights are red and stopped. From step 8 onward, the crossing traffic lights 2P, S2, 2A repeat the same operations as in steps 1-7.
As described above, in the case of the single step count method, the upstream and downstream traffic lights always turn on the same lamp color at the same timing.
FIG. 10 is a schematic diagram showing the relationship between the CPU 52 and the LSI 51 in the conventional method. For example, as command information from the CPU 52, a step signal (1 bit) for stepping, a page signal (2 bits) and status signal (2 bits) for changing the present data according to the time zone, and a ring signal (2 bits) for switching the step counter A total of 6 bits (1 bit) is transmitted to the LSI 51. Based on these signals, the LSI 51 checks whether or not the step signal transmitted from the CPU 52 is within the monitoring time, whether or not the page transition and the status transition are OK, and transmits the result to the CPU 52. In this way, the steps are advanced while confirming between the CPU 52 and the LSI 51.
Further, in Patent Document 1 as a conventional technique of the single step count method, when there is a pedestrian crossing request, a blue color for a pedestrian in the crossing direction of the pedestrian and a blue color for a vehicle in the same direction are quickly displayed. Make it visible. At that time, when the vehicle blue displayed in the direction crossing the crossing direction is cut off, a technique is disclosed in which the blue is cut off after displaying for at least the minimum blue time.
Japanese Patent Laid-Open No. 2003-77090

In a conventional signal control LSI, there is only one type of step counter that counts the number of seconds in each step, and it has not been possible to control uplink and downlink separately. In addition, since a step is counted up by one step command, skipping several steps requires special work and is not easy.
Further, in the prior art disclosed in Patent Document 1, in order to give priority to crossing pedestrians, when there is a crossing request from a pedestrian, the traffic light in the direction of travel is immediately turned blue, and the crossing traffic light is minimized. There is a risk that the vehicle will be jammed because it will be terminated.
In view of such problems, the present invention provides a signal control circuit with a plurality of step counters so that upstream and downstream signal control is performed independently, and a real-time signal according to the traffic situation of each inflow path at the intersection. An object is to provide a traffic signal controller capable of control.
Another object of the present invention is to provide a traffic signal controller that facilitates a skip operation of a step command by configuring a step signal transmitted from a CPU to have a plurality of bits.

In order to solve this problem, the present invention provides a control means for generating a step signal for switching the operation of the signal lamp every step, and the step signal generated based on the step signal generated by the control means. In a traffic signal controller comprising a signal control circuit for switching the operation of a signal lamp, and a display memory for storing lamp color data for lighting the signal lamp corresponding to the step signal, the signal control circuit includes: A plurality of step counting means for counting step signals generated from the control means, and reading out the lamp color data stored in the display memory based on the number of steps counted by each step counting means; Is turned on.
The signal control circuit of the present invention is different from the conventional one in that the signal control circuit includes a plurality of step counting means. That is, each step counting means is set based on the step signal transmitted from the control means, and the lamp color data stored in the display memory is read and turned on according to the set number of steps.
According to a second aspect of the present invention, the display memory stores the individual lamp color data for each step counted by the plurality of step counting means.
In the present memory, all lamp color data are recorded for each step of the plurality of step counting means. Accordingly, the lamp color data stored in accordance with the step numbers output from the plurality of step counting means are read out.
According to a third aspect of the present invention, the control means is configured to generate a step signal composed of a plurality of bits, and the count value of the step counting means can be counted so as to be skipped to a predetermined number of steps.
Another difference of the signal control circuit of the present invention from the prior art is that the step signal output from the control means is changed from 1 bit to a plurality of bits. For example, in the case of 5 bits, 32 types of steps can be arbitrarily output.

According to a fourth aspect of the present invention, the signal control circuit detects that the number of steps counted by the plurality of step counting means has reached a predetermined number of steps, and synchronizes the phases of the count value signals of the plurality of step counting means. It is characterized by that.
When the traffic lights are individually controlled by a plurality of step counting means, there is a risk that the upstream and downstream traffic lights are simultaneously blue at any time. Therefore, in the present invention, the phase synchronization of the count value signal of each step counting means is reestablished when it is detected that the number of steps counted by the step counting means has reached a predetermined number of steps.
According to a fifth aspect of the present invention, the signal control circuit synchronizes the phases of the count value signals of the plurality of step counting means based on the timing when all the lamp color data stored in the display memory becomes red. Features.
For traffic lights, there is always a timing when the upstream and downstream traffic lights turn red at the same time. Therefore, in the present invention, the phase synchronization of the count value signals of the respective step counting means is reestablished based on the timing when all the lamp color data stored in the display memory becomes red.
Claim 6 is a lamp color changing means for forcibly shifting the lamp color of the signal lamp to a flashing operation when the signal control circuit detects signal lamp data that disables simultaneous lighting in principle. And a lamp color output circuit for lighting the signal lamp unit based on lamp color data stored in the display memory.
The most dangerous condition for traffic lights is that the traffic lights in the crossing direction turn blue at the same time. In order to prevent this state, the signal control circuit of the present invention constantly monitors the blue signal data in the intersecting direction, and forcibly changes the color of the signal lamp to yellow and red alternately when it becomes blue at the same time ( A lamp color changing means for changing to a flashing operation) and a lamp color output circuit for lighting the signal lamp unit based on the lamp color data stored in the display memory.

According to the invention of claim 1, since the signal control circuit is provided with a plurality of step counting means, it is possible to independently control the uplink and downlink signals, and in real time according to the traffic situation of each inflow path at the intersection. Signal control can be performed.
Further, in the present invention, since the display memory stores individual lamp color data for each step counted by the plurality of step counting means, it is possible to cope with any traffic signal by changing the data in the display memory. It becomes possible to do.
According to a third aspect of the present invention, since the control means has a configuration for generating a step signal composed of a plurality of bits, an arbitrary number of steps can be designated, and a skip operation can be easily performed.
According to the fourth aspect of the present invention, the synchronization of the step counting means is re-established when it is detected that the step counted by the step counting means has reached a predetermined step, thereby avoiding the danger of simultaneously turning the traffic lights in the crossing direction into blue. can do.
According to the fifth aspect of the present invention, the synchronization of the step counting means is reestablished on the basis of the timing when all the lamp color data stored in the display memory becomes red. The risk of simultaneously turning the direction traffic lights blue can be further avoided.
Further, in claim 6, the blue color data in the direction of crossing is always monitored, and when it becomes blue at the same time, the lamp color changing means for forcibly changing the lamp color of the signal lamp to alternate blinking of yellow and red, Since it is equipped with a light color output circuit that lights the signal light device based on the light color data stored in the display memory, if the traffic light turns blue at the same time, it is forced to change the light color to other light. Can be prevented.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .
FIG. 1 is a block diagram of a configuration of a signal controller and a signal control circuit according to an embodiment of the present invention. The signal controller 100 is a CPU (control means) 2 that generates a step signal for switching the operation of the signal lamp every step, and the operation of the signal lamp (not shown) based on the step signal generated by the CPU 2. A signal control circuit 1 for switching, and a display memory 3 for storing lamp color data for lighting the signal lamp unit in correspondence with the step signal are configured.
The signal control circuit 1 includes an operation level determination circuit 4 that monitors the internal operation of the signal control circuit, a CPU interface circuit 5 that matches the interface with the CPU 2, a timer circuit (N) 6 that sets a unit time for the step, a timer A circuit (S) 8, a timer circuit (N) 6, a clock circuit 7 for generating a clock signal for driving the timer circuit (S) 8, and a step counter circuit for counting steps based on a step signal generated from the CPU 2 (Step counting means) (N) 9, step counter circuit (step counting means) (S) 10, and step signal generated from each of the step counter circuit (N) 9 and step counter circuit (S) 10 are synchronized. A synchronization circuit 11, a display memory reading circuit 12 for reading data in the display memory 3, and in principle When signal lamp data that cannot be turned on at the time is detected, a GG determination circuit (lamp color changing means) 13 that forcibly changes the lamp color of the signal lamp, and lamp color data stored in the display memory 3 And a lamp color output circuit 15 for lighting the signal lamp unit. Note that a G pickup replacement circuit 14 is provided in the preceding stage of the GG determination circuit 13 to replace a signal from the G pickup 17. The output signal of the lamp color output circuit 15 is temporarily replaced by the lamp color replacement circuit 16 and output as a lamp color output 18.

  FIG. 2 is a diagram showing an example of an intersection used for explaining the operation of the present invention. At this intersection, for convenience of explanation, the direction from the bottom to the top and the left to the right is the N direction (the direction controlled by the step counter circuit (N) 9), the direction from the top to the bottom, and the direction from the right to the left is S. Direction (direction controlled by the step counter circuit (S) 10). However, the directions of the right turn arrows 1A and 2A are reversed. The vehicle controlled by the traffic lights 1Y, 1R, 1G, and 1A in the N direction is denoted by 30, and the vehicle controlled by the traffic signals 1Y, 1R, 1G, and 1A in the S direction is denoted by 26. Further, 29 is a vehicle controlled by the traffic lights 2Y, 2R, 2G and 2A in the S direction, and 25 is a vehicle controlled by the traffic lights 2Y, 2R, 2G and 2A in the N direction. Further, 20 is a pedestrian controlled by the traffic light 1P in the N direction, and 22 is a pedestrian controlled by the traffic light 1P in the S direction. Further, 23 is a pedestrian controlled by the traffic light 2P in the S direction, and 21 is a pedestrian controlled by the traffic light 2P in the N direction. In order to simplify the explanation, it is assumed that the pedestrian proceeds only in the direction of the arrows of the sidewalks 24, 27, 28, and 31, and the traffic signal on the opposite side is omitted.

FIG. 3 is a current floor plan for explaining the operation when there is no time difference of the dual step count method by the signal controller of the present invention. The horizontal axis indicates the number of steps, and the vertical axis indicates each signal name. The flowchart of each signal is shown in the same figure. Here, a thick black line indicates that the traffic light is blue, a vertical line indicates blinking, a corrugation indicates that the traffic light is yellow, and an arrow indicates that it can proceed in the direction of the arrow. The double line indicates that the traffic light is red. 1P, 2P indicate pedestrian traffic lights, 1Y, 1R and 2Y, 2R indicate vehicle traffic lights, 1G, 2G indicate vehicle straight and left turn signal lights, 1A, 2A indicate vehicle right turn signal lights. In the following description, the same reference numerals indicate the same contents. In order to further clarify the description, description will be made with reference to the schematic diagram of the intersection in FIG. The same constituent elements will be described with the same reference numerals.
First, in step 1 in the N direction, the pedestrian traffic light 1P (hereinafter simply referred to as 1P) is blue, the vehicle traffic lights 1Y and 1R (hereinafter simply referred to as 1Y and 1R) are red, and the vehicle straight and left turnable traffic lights. 1G (hereinafter simply referred to as 1G) is blue, right turn signal 1A for vehicles (hereinafter simply referred to as 1A) is unlit, pedestrian traffic light 2P (hereinafter simply referred to as 2P) is red, and vehicle traffic light 2Y 2R (hereinafter simply referred to as 2Y, 2R) is red, vehicle straight traveling and left turn signal 2G (hereinafter simply referred to as 2G) is unlit, vehicle right turn signal 2A (hereinafter simply referred to as 2A) is There is no light. That is, the pedestrian 20 can travel by 1P, and the vehicle 30 can travel straight and turn left by 1G while 1Y and 1R are red. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 1 in the S direction, 1P is blue, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 can travel by 1P, and the vehicle 26 can travel straight and turn left by 1G although 1Y and 1R are red. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.

Next, in step 2 in the N direction, 1P flashes, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 20 is alerted by 1P, and the vehicle 30 is 1Y, 1R is red, but can go straight and turn left by 1G. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 2 in the S direction, 1P is flashing, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 is alerted by 1P, and the vehicle 26 is red in 1Y and 1R, but can go straight and turn left in 1G. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in step 3 in the N direction, 1P is red, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 20 stops by 1P, and the vehicle 30 can turn straight and turn left by 1G although 1Y and 1R are red. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 3 in the S direction, 1P is red, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 stops by 1P, and the vehicle 26 can turn straight and turn left by 1G although 1Y and 1R are red. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in Step 4 in the N direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. ing. That is, the pedestrian 20 stops by 1P, and the vehicle 30 proceeds with caution because 1Y and 1R are yellow. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 4 in the S direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 22 stops by 1P, and the vehicle 26 proceeds with caution because 1Y and 1R are yellow. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.

Next, in step 5 in the N direction, 1P is red, 1Y, 1R is red, 1G is no light, 1A is blue, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 20 is stopped by 1P, and the vehicle 30 is red for 1Y and 1R, but can only turn right. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 5 in the S direction, 1P is red, 1Y, 1R is red, 1G is no light, 1A is blue, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 is stopped by 1P, and the vehicle 26 is 1Y, 1R is red, but can only turn right. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in step 6 in the N direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. ing. That is, the pedestrian 20 stops by 1P, and the vehicle 30 proceeds with caution because 1Y and 1R are yellow. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 6 in the S direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 22 stops by 1P, and the vehicle 26 proceeds with caution because 1Y and 1R are yellow. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in step 7 in the N direction, all the traffic lights that are lit are red. That is, the pedestrian 20 is stopped by 1P, and the vehicle 30 is stopped by 1Y, 1R. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 7 in the S direction, all the lit traffic lights are red. That is, the pedestrian 22 stops by 1P, and the vehicle 26 stops by 1Y, 1R. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. Then, when step 7 is completed by the step synchronization circuit 11, the step counter circuit (N) 9 and the step counter circuit (S) 10 are synchronized so as to coincide with the falling edge. In step 8 and subsequent steps, the traffic lights 2P, 2Y, 2R, 2G, and 2A that intersect in both the N direction and the S direction repeat the same operations as in steps 1 to 7, and thus the description thereof is omitted.

FIG. 4 is a current floor plan for explaining the operation in the case where there is a large traffic demand in the N-direction straight travel, left turn and right turn in the S direction by the signal controller of the present invention.
First, in Step 1 in the N direction, 1P is blue, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 20 can travel by 1P, and the vehicle 30 can travel straight and turn left by 1G while 1Y and 1R are red. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 1 in the S direction, 1P is blue, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 can travel by 1P, and the vehicle 26 can travel straight and turn left by 1G although 1Y and 1R are red. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in step 2 in the N direction, 1P flashes, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 20 is alerted by 1P, and the vehicle 30 is 1Y, 1R is red, but can go straight and turn left by 1G. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 2 in the S direction, 1P flashes, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 is alerted by 1P, and the vehicle 26 is red in 1Y and 1R, but can go straight and turn left in 1G. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.

Next, in step 3 in the N direction, 1P is red, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 20 stops by 1P, and the vehicle 30 can turn straight and turn left by 1G although 1Y and 1R are red. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 3 in the S direction, 1P is red, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 stops by 1P, and the vehicle 26 has a small traffic volume so that 1Y and 1R are red, but 1G can go straight ahead and turn left for a short time. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. Here, time is different between step 3 in the N direction and step 3 in the S direction, and control is performed to lengthen step 3 in the N direction. That is, when the traffic volume in the N direction is larger than that in the S direction, efficient control can be performed by increasing the time of the traffic light G in the N direction.
Next, step 4 in the S direction is started while step 3 in the N direction continues. In step 4 in the S direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 stops by 1P, and the vehicle 26 proceeds with caution because 1Y and 1R are yellow. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. At this time, the vehicle 30 can still go straight and turn left.
Next, step 5 in the S direction is started while step 3 in the N direction continues. In step 5 in the S direction, 1P is red, 1Y, 1R is red, 1G is no light, 1A is blue, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. That is, the pedestrian 22 is stopped by 1P, and the vehicle 26 is 1Y, 1R is red, but can only turn right. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. That is, when the traffic volume of the right turn in the S direction is larger than that in the N direction, efficient control can be performed by increasing the time of the traffic light 1A in the S direction.

Next, while step 5 in the S direction continues, step 3 in the N direction ends and step 4 starts. In Step 4 in the N direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 20 stops by 1P, and the vehicle 30 proceeds with caution because 1Y and 1R are yellow. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R.
Next, while step 5 in the S direction is continuing, step 5 in the N direction is started. In Step 5 in the N direction, 1P is red, 1Y, 1R is red, 1G is no light, 1A is blue, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. That is, the pedestrian 20 is stopped by 1P, and the vehicle 30 is red for 1Y and 1R, but can only turn right. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. Then, step 5 in the N direction and the S direction is completed at the same time.
Next, in step 6 in the N direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. ing. That is, the pedestrian 20 stops by 1P, and the vehicle 30 proceeds with caution because 1Y and 1R are yellow. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 6 in the S direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 22 stops by 1P, and the vehicle 26 proceeds with caution because 1Y and 1R are yellow. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in step 7 in the N direction, all the traffic lights that are lit are red. That is, the pedestrian 20 is stopped by 1P, and the vehicle 30 is stopped by 1Y, 1R. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 7 in the S direction, all the lit traffic lights are red. That is, the pedestrian 22 stops by 1P, and the vehicle 26 stops by 1Y, 1R. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. Then, when step 7 is completed by the step synchronization circuit 11, the step counter circuit (N) 9 and the step counter circuit (S) 10 are synchronized so as to coincide with the falling edge. In step 8 and subsequent steps, the traffic lights 2P, 2Y, 2R, 2G, and 2A that intersect in both the N direction and the S direction repeat the same operations as in steps 1 to 7, and thus the description thereof is omitted.

FIG. 5 is a current floor plan for explaining the operation in the case where there is a large traffic demand in the S-direction straight turn, left turn, and N-turn right turn by the signal controller of the present invention.
First, in Step 1 in the N direction, 1P is blue, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 20 can travel by 1P, and the vehicle 30 can travel straight and turn left by 1G while 1Y and 1R are red. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 1 in the S direction, 1P is blue, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 can travel by 1P, and the vehicle 26 can travel straight and turn left by 1G although 1Y and 1R are red. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in step 2 in the N direction, 1P flashes, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 20 is alerted by 1P, and the vehicle 30 is 1Y, 1R is red, but can go straight and turn left by 1G. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 2 in the S direction, 1P is flashing, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 is alerted by 1P, and the vehicle 26 is red in 1Y and 1R, but can go straight and turn left in 1G. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.

Next, in step 3 in the N direction, 1P is red, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 20 stops by 1P, and the vehicle 30 has a small traffic volume, so 1Y and 1R are red, but 1G can go straight and turn left. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 3 in the S direction, 1P is red, 1Y, 1R is red, 1G is blue, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 stops by 1P, and the vehicle 26 can turn straight and turn left by 1G although 1Y and 1R are red. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. Here, time is different between step 3 in the N direction and step 3 in the S direction, and control is performed to lengthen step 3 in the S direction. That is, when the traffic in the S direction is larger than that in the N direction, efficient control can be performed by increasing the time of the traffic light G in the S direction.
Next, while step 3 in the S direction is continuing, step 4 in the N direction is started. In Step 4 in the N direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 20 stops by 1P, and the vehicle 30 proceeds with caution because 1Y and 1R are yellow. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. At this time, the vehicle 26 can still go straight and turn left.
Next, while step 3 in the S direction is continuing, step 5 in the N direction is started. In Step 5 in the N direction, 1P is red, 1Y, 1R is red, 1G is no light, 1A is blue, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. That is, the pedestrian 20 is stopped by 1P, and the vehicle 30 is red for 1Y and 1R, but can only turn right. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. That is, when the traffic volume of the right turn in the N direction is larger than that in the S direction, efficient control can be performed by increasing the time of the traffic light 1A in the N direction.

Next, while step 5 in the N direction continues, step 3 in the S direction ends and step 4 starts. In step 4 in the S direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. . That is, the pedestrian 22 stops by 1P, and the vehicle 26 proceeds with caution because 1Y and 1R are yellow. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, step 5 in the S direction is started while step 5 in the N direction continues. In step 5 in the S direction, 1P is red, 1Y, 1R is red, 1G is no light, 1A is blue, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. That is, the pedestrian 22 is stopped by 1P, and the vehicle 26 is 1Y, 1R is red, but can only turn right. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. Then, step 5 in the N direction and the S direction is completed at the same time.
Next, in step 6 in the N direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. ing. That is, the pedestrian 20 stops by 1P, and the vehicle 30 proceeds with caution because 1Y and 1R are yellow. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 6 in the S direction, 1P is red, 1Y, 1R is yellow, 1G is no light, 1A is no light, 2P is red, 2Y, 2R is red, 2G is no light, and 2A is no light. Yes. That is, the pedestrian 22 stops by 1P, and the vehicle 26 proceeds with caution because 1Y and 1R are yellow. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R.
Next, in step 7 in the N direction, all the traffic lights that are lit are red. That is, the pedestrian 20 is stopped by 1P, and the vehicle 30 is stopped by 1Y, 1R. The pedestrian 21 is stopped by 2P, and the vehicle 25 is stopped by 2Y, 2R. On the other hand, in step 7 in the S direction, all the lit traffic lights are red. That is, the pedestrian 22 stops by 1P, and the vehicle 26 stops by 1Y, 1R. The pedestrian 23 is stopped by 2P, and the vehicle 29 is stopped by 2Y and 2R. Then, when step 7 is completed by the step synchronization circuit 11, the step counter circuit (N) 9 and the step counter circuit (S) 10 are synchronized so as to coincide with the falling edge. In step 8 and subsequent steps, the traffic lights 2P, 2Y, 2R, 2G, and 2A that intersect in both the N direction and the S direction repeat the same operations as in steps 1 to 7, and thus the description thereof is omitted.

  FIG. 6 is a schematic diagram showing the relationship between the CPU 2 and the signal control circuit 1 in the present invention. For example, as command information from the CPU 2, a step signal for stepping (5 bits), a page signal (2 bits) and status signal (2 bits) for changing the present data according to the time zone, and a ring signal (step signal for switching the step counter) A total of 10 bits (1 bit) is transmitted to the signal control circuit 1. Based on these signals, the signal control circuit 1 checks whether or not the step signal transmitted from the CPU 2 is within the monitoring time, whether or not page transition and status transition are OK, and whether or not the synchronization is performed in the barrier step. Then, the result is transmitted to the CPU 2. In this way, the steps are advanced while checking between the CPU 2 and the signal control circuit 1. That is, even if the CPU 2 outputs a transition command to a wrong step at the time of transition of each step, the signal control circuit 1 guards to prevent transition if the transition flag is not set.

  As described above, according to the present invention, the signal control circuit 1 includes the step counter circuit (N) 9 and the step counter circuit (S) 10, so that the upstream and downstream signal control can be performed independently, and the intersection Real-time signal control can be performed according to the traffic situation of each inflow path. Further, since the display memory 3 stores individual lamp color data for each step counted by the step counter circuit (N) 9 and the step counter circuit (S) 10, the data in the display memory 3 is changed. Any signal can be handled. Further, since the CPU 2 has a configuration for generating a step signal composed of a plurality of bits, an arbitrary number of steps can be designated, and a skip operation can be easily performed. In addition, when the step counter circuit (N) 9 and the step counter circuit (S) 10 detect that the steps counted have reached a predetermined step, the synchronization of the step counter circuits is resumed. At the same time, the danger of turning blue can be avoided. In addition, since each step counter circuit is re-synchronized on the basis of the timing when all the lamp color data stored in the display memory 3 becomes red, the re-synchronization is always performed in one cycle operation, and the signal device in the direction of crossing. The risk of turning blue at the same time can be further avoided. Also, the blue signal data in the direction of crossing is always monitored by the GG determination circuit 13, and when it becomes blue at the same time, the light color of the signal light device is forcibly changed to alternately blinking yellow and red. When the color becomes blue at the same time, it is possible to forcibly prevent other dangers by using a different light color.

1 is a block diagram of a configuration of a signal controller and a signal control circuit according to an embodiment of the present invention. It is a figure which shows an example of the intersection used in order to demonstrate operation | movement of this invention. It is a presenting step figure explaining operation when there is no time difference of the dual step count method by the signal controller of the present invention. It is the present | indicated floor plan explaining operation | movement when there is much traffic demand of the straight drive of the N direction of the dual step count system by the signal controller of this invention, the left turn, and the right turn of the S direction. It is the present | indicated floor plan explaining operation | movement in case there is much traffic demand of the straight drive of S direction and the left turn of the dual step count system by the signal controller of this invention, and the right turn of N direction. It is a schematic diagram showing the relationship between CPU2 and the signal control circuit 1 in this invention. It is a block diagram of the structure of a conventional signal controller and a signal control circuit. It is a presenting step figure explaining the operation | movement of the conventional single step count system. It is a figure which shows an example of the intersection used in order to demonstrate conventional operation | movement. It is a schematic diagram showing the relationship between CPU52 and LSI51 in a conventional system.

Explanation of symbols

  Reference Signs List 1 signal control circuit, 2 CPU, 3 display memory, 4 operation level determination circuit, 5 CPU interface circuit, 6 timer circuit (N), 7 clock circuit, 8 timer circuit (S), 9 step counter circuit (N), 10 step counter circuit (S), 11 step synchronization circuit, 12 display memory reading circuit, 13 GG determination circuit, 15 light color output circuit, 100 signal controller

Claims (6)

Control means for generating a step signal for switching the operation of the signal lamp every step, a signal control circuit for switching the operation of the signal lamp based on the step signal generated by the control means, and lighting the signal lamp In a traffic signal controller comprising a display memory for storing lamp color data corresponding to the step signal,
The signal control circuit includes a plurality of step counting means for counting step signals generated from the control means, and the lamp color data stored in the display memory based on the number of steps counted by each step counting means. A traffic signal controller characterized in that the signal lamp is turned on by reading out the signal.   The traffic signal controller according to claim 1, wherein the present memory stores the individual lamp color data for each step counted by the plurality of step counting means.   The said control means is provided with the structure which generate | occur | produces the step signal which consists of several bits, and it was made possible to count so that the count value of the said step count means might be skipped to the predetermined step number. Traffic signal control machine.   The signal control circuit detects that the step counted by the plurality of step counting means has reached a predetermined number of steps, and synchronizes the phases of the count value signals of the plurality of step counting means. The traffic signal controller according to claim 1, 2 or 3.   The signal control circuit synchronizes the phases of the count value signals of the plurality of step counting means based on the timing when all the lamp color data stored in the display memory becomes red. The traffic signal controller according to 1, 2 or 3.   The signal control circuit includes a lamp color changing means for forcibly shifting the lamp color of the signal lamp to a flashing operation when detecting signal lamp data that disables simultaneous lighting in principle. The traffic signal controller according to claim 1, further comprising a lamp color output circuit that lights the signal lamp unit based on stored lamp color data.

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