JPS58123200A - Traffic signal - 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 The present invention relates to a traffic signal that performs sensitive control based on information from a vehicle sensor.

Conventionally, this type of traffic signal has an input circuit 1, for example, as shown in FIG. Averaging circuit 2. Reference value setting section 3. It is composed of a comparison circuit 4. In the conventional traffic signal shown in Fig. 1, if the vehicle sensor is normal, a control button is selected depending on the traffic volume, but if the vehicle sensor is abnormal,
The drawback was that only specific control buttons were selected and the operation was unrelated to traffic volume. In other words, when a sensor abnormality occurs, the system is controlled in a single-stage pattern and operates independently of the actual traffic volume at the intersection, causing traffic congestion or time loss due to wasted green light time, which has a serious impact on traffic flow. There were drawbacks.

In order to eliminate these drawbacks, the present invention adds a second averaging circuit 6, a second comparison circuit, a button storage circuit 7, etc. to the conventional circuit as shown in FIG. This is a device that adds a button control circuit 81 and a clock circuit 9, and realizes a control button that corresponds to the current time by utilizing the fact that the traffic flow button on the previous day or the previous day is almost the same as the traffic flow button on the current day. It is.

The information of the vehicle sensor shown in FIG. 3A (for example, a signal based on the running noise of the vehicle) is input to the input circuit 1, and is converted into a signal corresponding to the vehicle presence time, and its output signal (FIG. 3B) is input to the first averaging circuit 2 and the second averaging circuit 6.0 The first averaging circuit 2 averages data for several seconds, whereas the second averaging circuit 6 averages data for about 16 minutes. The reference value setting unit 3 is a part that sets a value that becomes a reference for not converting data, and outputs it to the first comparison circuit 4 and the second comparison circuit 6 as a reference value. The first comparison circuit 4 compares the data from the first averaging circuit 2 with the reference value from the reference setting section 3, and converts the data in stages.

(FIGS. 3C to 3H) When the sensor is normal, responsive control is performed using a bang signal from the first comparator circuit 4. Second comparison circuit 6
compares the data averaged by the second averaging circuit 5 with the reference value from the reference setting section 3, and converts the data in stages. The bang storage section 7 stores the bang signal from the second comparison circuit 6 and the date and time values from the clock circuit 9. The data in the button storage section 7 is updated on a weekly basis.

For example, when the slamming for the day is completed, data from one week ago is erased and new data is stored at the time of completion. The bang control circuit 8 operates when the sensor is abnormal, and extracts a bang signal based on the data from the bang storage section 7 and the current date and time from the clock circuit 9. Traffic signals can be controlled by the extracted bang signals.

As explained above, according to the present invention, when a sensor abnormality occurs, signal control is performed using meta/data from the previous day or the previous day, so it has advantages such as being able to control in accordance with the actual traffic flow. It is.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the main parts of a conventional traffic signal, Fig. 2 is a block diagram of the main parts of a traffic signal according to an embodiment of the present invention, and Figs. 3A to 3H are explanatory diagrams of the operation of the traffic signal. be. DESCRIPTION OF SYMBOLS 1...Input circuit, 2...Averaging circuit, 3...Reference value setting section, 4...Comparison circuit, 5...・Averaging circuit, 6... Comparison circuit, 7... Par/storage section, 8... Bang control section.

Claims (1)

[Claims] , multiple control butters/controls according to the average value of the vehicle sensor output.
a control pattern storage means for storing a control button according to the average value of the output of the vehicle sensor according to the time; a detection means for detecting an abnormality of the vehicle sensor; and a clock circuit. A traffic signal, characterized in that when the detection means detects an abnormality in a vehicle sensor, the traffic signal is controlled by a control button stored in the control button storage means.