JPS63146200A - Traffic signal controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a traffic signal control device used in a traffic control system that safely and smoothly controls road traffic.

BACKGROUND OF THE INVENTION Conventionally, this type of traffic signal control device sequentially advances the steps of a control sequence using a step-by-step signal from the center or a self-step-by-step pulse from a timer, and performs sequence control of signal lamps in accordance with the steps. The state of the step being executed is sent back to the center in order to synchronize with the central operation sequence. Furthermore, when the power is turned on, all the signal lights are displayed in red for a certain period of time, and then sequence control is performed starting from the state where the main side lights are blue and the intersection side lights are red. Furthermore, in order to perform synchronized control with the central control sequence, remote control is started from the start of the control sequence using step signals from the central system.

Problems to be Solved by the Invention However, in the above-mentioned conventional traffic signal control device, the status of the step being executed is immediately sent back to the center from the time the power is turned on, so that the starting point of the control sequence, that is, the start of the first step, is The return contents of the step status and the step status at power-off are the same, and the starting point of the control sequence can only be determined from the center when the control sequence starts at 1 after the power is turned on.
After a cycle has elapsed, the step state changes from the final step to the first step.

For this reason, although remote control using stepping pulses from the center is possible, there is a delay from the time the power is turned on until one cycle of the control sequence has elapsed, which poses various problems in terms of traffic control.

The present invention solves these conventional problems,
It is an object of the present invention to provide an excellent traffic signal control device that enables central remote control from the first control sequence after power is turned on.

Means for Solving the Problems In order to achieve the above object, the present invention provides a means for selecting an arbitrary step state and sending it back to the center, and during the initial all-red display period for a certain period of time after the power is turned on, the execution This allows any step state to be sent back to the center, giving priority to the step state inside.

Therefore, according to the present invention, an arbitrary step state, for example, the final step state of a control sequence, is selected and set during the all-red display immediately after the power is turned on, and is sent back to the center, and after the all-red display ends, the first step is Since the status can be sent back and the start point of the first control sequence after power-on is made clear, remote control from the center can be executed from the beginning of the control sequence after power-on.

Embodiment The drawing is a block diagram of a traffic signal control device according to an embodiment of the present invention. In the drawing, reference numeral 1 denotes a step signal selection section, into which a step signal from the center, a remote signal, and a self-step signal are input, the output is input to a timer and a step counter 2, and the output of the timer is the self-step signal. It is a signal. Timer and step output; step output of 1.2.
4.8 (indicating each binary code) is input to the execution step return buffer 3 and the signal control unit 4.

5 is an initial full red signal output section, and its output is sent to buffer 3.
is input to the signal control section 4, timer and step counter 2, and arbitrary step return buffer 6, and the timer and step counter 2 are reset. The signal control unit 4 causes the signal lamps 8.9 and 10.11 to display red for a certain period of time after the power is turned on. Further, either the buffer 3 or the buffer 4 is selected by the signal from the initial full red signal output section 5, and the other is prohibited. 7 is an arbitrary step setting section, which sends step signals 1.2.4.8 to the buffer 6.
(each in binary code) is output.

The output of the signal controller 4 is connected to a signal lamp device 8.9.10.11. Signal lights 8.9.1Q and 11 are blue (
It has Gl, yellow (G), and red (R1) lamps, which are blinked sequentially by the signal control unit 4 to control traffic flow.

Next, the operation of the above embodiment will be explained. Output (OUT) from the initial full red signal output section 6 for a certain period of time after the power is turned on.
As a result, the timer and step counter 2 are reset to the first step state, the signal control section 4 outputs red to all signal lamp outputs, and the signal lamps 8.9.1Q and 11 display red. Also, since a signal is input to the output inhibit gate (G) of the buffer 3 for returning the step being executed, the state of the step being executed (in this case, the step counter has been reset to the first step) is not returned. The arbitrary step return buffer 6 outputs the output possible game 1- (Since a signal is input to Gl, the arbitrary step setting unit 7 sets 1, for example, the final step state, and the arbitrary step return buffer 6 outputs the final step as a step return signal. Send back the status.

Next, after the initial full red time, the initial full red signal output section 5 (O
The signal is no longer output from UT), the output of buffer 6 (OUTl, 2, 4.8) is prohibited, the output of buffer 3 (OUTl, 2.4.8) is enabled, and the timer and step counter 2 The step status, the first step, is returned to the center through the executing step return buffer 3. At this point, the return step state changes from "final step" to "first step", and the change to the first step state, which is the start of the control sequence, can be clearly determined in the center, and from this point on, the remote signal is transmitted. Sending out.

Perform remote control of traffic signal controllers. That is, when a remote signal is input to the step selector 1 (SEL), the self-step signal input (IN2) is prohibited, and the step signal from the center is
OUT), and serves as a stepping input for the timer and step counter 2. Thereafter, the step counter is sequentially advanced by step stepping input from the center, and sequence control of the signal lamp is performed.

However, if the step signal from the center is lost due to a failure etc., or if the remote signal is lost, the 1 step step signal selection section 1
outputs a self-stepping signal to timer 2 and step counter 2, and from then on, the signal lamps are sequentially controlled in sequence by independent control by self-stepping.

In this way, according to the above embodiment, by setting the arbitrary step setting section 7 to the final step during the initial full red time, after the final step signal is returned to the center, From the beginning of the control sequence, a first step signal can be sent back to the center. Therefore, remote control can be performed from the center from the start of the first sequence after power is turned on, and has the advantage that optimal control of traffic flow can be performed more quickly by remote control when the system starts up or when power is restored from a power outage. .

Effects of the Invention As is clear from the above embodiments, the present invention is capable of quickly executing remote control from the center after power is turned on. This has the advantage that remote control can be performed using step signals. Therefore, optimal control according to traffic flow can be implemented immediately when the system starts up or when power is restored from a power outage.

In addition, if there is a power outage while special control from the center is being executed, such as various sensitive controls, night flash control, status change control, etc., remote control can be performed only when the power is restored, without having to perform independent control that is inconsistent with commands from the center. Since the control is executed and special control is performed, it has a large effect on smooth traffic flow and safety.

[Brief explanation of the drawing]

The drawing is a block diagram of a traffic signal control device in one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Step signal selection unit, 2... Timer and step counter, 3... Buffer for returning the step being executed, 4
... Signal control section, 6... Initial full red signal output section, 6.
...Arbitrary step return buffer, 7...Arbitrary step setting section, 8.9.10.11...Signal light device (0, Y
, R). Name of agent: Patent attorney Toshio Nakao and one other person

Claims (1)

[Claims] A step signal selection unit that sequentially advances the steps of the control sequence by either a step step signal from the center or a self-step pulse from a timer, and a step signal selection unit that sends the state of the step being executed back to the center. a step return buffer, a signal control unit that performs sequence control of the traffic light devices in accordance with the above steps, and initial all-red signal output means for displaying red on all traffic light devices when the power is turned on;
Equipped with an arbitrary step return buffer that selects an arbitrary step state and returns it to the center. During the initial all-red display after power-on, any step state is returned to the center, and after the all-red display ends, it returns the selected step state to the center. A traffic signal control device that sends step status back to the center.