JP2917078B2 - Overtopping wave judgment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention creates a criterion for overtopping from past weather data or the like, uses the criterion to determine overtopping from data obtained by various sensors, and issues an overtopping warning to a road manager. The present invention relates to a provided overtopping wave judging device.

[0002]

2. Description of the Related Art Conventionally, on a road or the like constructed along a coast or the like, a so-called overtopping of a wave occurs on a road or the like due to a change in weather conditions (wind direction, wind speed, pressure, etc.). This overtopping is often due to a patrol by a person or a report from a person trying to pass through the place after the overtopping actually occurred. In the case of overtopping monitoring by a surveillance camera, monitoring the image for a long time by the observer places a heavy burden on the observer, and monitoring is impossible at night.

[0003]

Therefore, conventionally,
Unless a person goes to the place where the overtopping occurs for surveillance or is notified, the overtopping cannot be found, delaying the decision to ensure traffic safety.

[0004] The present invention has been made in order to solve the above problems.
An object of the present invention is to analyze the situation of occurrence of overtopping from past weather and wave data, and to provide a road manager with an overtopping warning using various weather sensors and imaging devices.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an anemometer as a sensor for grasping weather conditions, an anemometer, a barometer, and data from each sensor. A data processing unit that determines the overtopping by performing processing based on the criterion of the overtopping from the weather data or the like, and a display unit that displays the determination result by the data processing unit.

Further, an imaging unit for monitoring the sea in an area where an overtopping is expected, a transmission unit for transmitting a video signal from the imaging unit to a data processing unit, and an image for subjecting the transmitted video signal to image processing. A processing unit is provided. Furthermore, an imaging unit that monitors the sea in an area where overtopping is expected, a night-vision imaging unit that captures the sea at night, a switch that switches between the imaging unit and the night-vision imaging unit, The image processing apparatus includes a transmission unit that transmits a video signal from an imaging unit to a data processing unit, and an image processing unit that performs image processing on the transmitted video signal.

[0007]

Therefore, according to the present invention, the data processing unit uses the data from the various sensors and the image data obtained by subjecting the video taken by the image pickup unit to image processing by the image processing unit to obtain past weather and weather information.
Analyzing the situation where overtopping occurs from wave data,
The result of the determination can be displayed on the display unit, and a warning of the occurrence of overtopping can be issued by automatic monitoring, so that the load on the road manager can be reduced.

[0008]

FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention. In FIG. 1, 1 is a barometer, 2 is an anemometer, 3 is an anemometer, 4 is a data processing unit, and 5 is a display unit.

Next, the operation will be described.
The anemometer 2 and the anemometer 3 are sensors for grasping a weather condition, and always send each measurement result to the data processing unit 4. The data processing unit 1 analyzes the situation of occurrence of overtopping from past weather and wave data, and gives a warning to the road manager via the display unit 5 based on the processed result.

FIG. 2 shows a measurement example of each sensor when an overtopping occurs. (1) shows the wind speed, (2) shows the atmospheric pressure, and (3) shows the wind direction at time t. As shown in FIG. 2, a criterion for judging the overtopping prediction is obtained from the correlation between the respective data when the overtopping occurred in the past (black circles indicate overtopping, white circles indicate no overtopping). FIG.
FIG. 4 shows an example of the relationship between the wind direction (horizontal axis) and the wind speed (vertical axis).
Fig. 5 shows an example of the relationship between the atmospheric pressure (horizontal axis) and the wind speed (vertical axis). Fig. 5 shows the pressure difference (horizontal axis) and the wind speed several hours before the measurement.
FIG. 6 shows an example of a criterion for judging the overtopping area A obtained from the results of FIGS. 3 to 5, whereby an overtopping warning is issued to the display unit 5.

FIG. 7 is a block diagram showing the configuration of a second embodiment of the present invention. In the second embodiment, the components of the first embodiment shown in FIG. 1 include an imaging unit 6 for monitoring the sea in an area where an overtopping is expected, and a video signal from the imaging unit 6 for data processing. A transmission unit 7 for transmitting data to the unit 4 and an image processing unit 8 for performing image processing on a transmitted video signal. The data processing unit 4 includes data from each of the sensors 1 to 3 and an image processing unit. 8 is analyzed to determine overtopping.

Next, the operation will be described. In addition to the operation of the first embodiment, the data from the image pickup section 6 is subjected to image processing by the image processing section 8 to extract the characteristic at the time of occurrence of overtopping. In step 4, a final overtopping warning is displayed on the display unit 5 by adding the determination result by the image processing to the determination result shown in the first embodiment.

FIG. 8 shows a criterion for determining a wave condition by image processing in the image processing section 8 of FIG. Here, an overtopping determination method by image processing will be described. The sea overtopped in the past
The standard deviation value and the average luminance value at sea in the wave conditions in the black state, the rough state (white triangle), and the normal state (white circle) are obtained. The correlation between the wave condition, the reference deviation value and the average luminance value is represented as shown in FIG.
For example, if the discriminant functions f ₁ (σ) and f ₂ (σ) as shown in FIG.

[0014]

[Outside 1]

[0015]

(Equation 1)

At this time, an overtopping wave generation area A is set.

FIG. 9 is a block diagram showing the configuration of the third embodiment of the present invention. In the third embodiment, the components of the second embodiment shown in FIG. 7 are replaced with a night-vision imaging unit 9 and an imaging unit 6 which enable nighttime monitoring of the sea in an area where overtopping is expected. Switch (SW) 10 is added,
The data processing unit 4 performs an overtopping prediction determination process based on data from the sensors 1 to 3 and data from the image processing unit 8.

Next, the operation will be described. In addition to the operation of the second embodiment, when the monitoring by the imaging unit 6 becomes impossible at night, the night-vision imaging unit 9 that enables night monitoring is used. The image data is switched by the changeover switch 10, the night vision data is processed by the image processing unit 8, the characteristic at the time of occurrence of the overtopping is extracted, and the data processing unit 4 applies the image processing to the determination result shown in the first embodiment. And a final overtopping warning is displayed on the display unit 5.

[0019]

As described above, the overtopping wave judging device of the present invention processes data from a wind direction meter, an anemometer, and a barometer as sensors for grasping a weather condition, and judges and automatically monitors overtopping waves. As a result, the load on the road manager can be reduced.

Further, since an image pickup section is provided for monitoring the sea in an area where an overtopping is expected over the day and night, it is possible to automatically monitor overtopping in response to a change in weather conditions.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a diagram showing an example of measurement of air pressure, wind direction, and wind speed.

FIG. 3 is a diagram showing a relationship between wind direction and wind speed.

FIG. 4 is a diagram showing a relationship between air pressure and wind speed.

FIG. 5 is a diagram showing a relationship between a pressure difference and a wind speed.

FIG. 6 is a diagram illustrating an example of determination of an overtopping region by a sensor.

FIG. 7 is a block diagram illustrating a configuration of a second exemplary embodiment of the present invention.

FIG. 8 is a diagram showing an overtopping occurrence area by the image processing in FIG. 7;

FIG. 9 is a block diagram showing a configuration of a third exemplary embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... barometer, 2 ... anemometer, 3 ... anemometer, 4 ... data processing part, 5 ... display part, 6 ... imaging part, 7 ... transmission part, 8 ... image processing part, 9 ... night vision imaging part, 10 ... Changeover switch (SW).

Claims (3)

(57) [Claims] 1. An anemometer, an anemometer, a barometer as sensors for grasping a weather condition, and data from each sensor are processed based on past weather data and the like based on a criterion of overtopping. An overtopping wave judging device comprising: a data processing unit for judging an overtopping wave; and a display unit for displaying a judgment result by the data processing unit. 2. An imaging unit for monitoring the sea in an area where an overtopping is expected, a transmission unit for transmitting a video signal from the imaging unit to a data processing unit, and an image for performing image processing on the transmitted video signal. 2. A processing unit comprising: a processing unit;
An overtopping wave judging device according to the above. 3. An imaging unit for monitoring the sea in an area where an overtopping is expected, a night vision imaging unit for photographing the sea at night, a switch for switching between the imaging unit and the night vision imaging unit, and an imaging unit. 2. The overtopping wave judging device according to claim 1, further comprising: a transmission unit that transmits a video signal from a night vision imaging unit to a data processing unit; and an image processing unit that performs image processing on the transmitted video signal. .