JPH03211700A - Landslide automatic watching device - Google Patents

Abstract

PURPOSE:To watch a landslide throughout 24 hours even if a person does not go to a site by detecting the landslide automatically by using a television camera and other picture processors, and transmitting an alarm signal and picture data to a central device at a remote place. CONSTITUTION:The picture signal of a landslide occurrence probable zone image-picked up by an image pickup part 1 is analog-digital-converted at definite periods by a picture processing part 2. Then, differential picture information between the picture of the last time of the picture of this time is processed arithmetically, and it is decided whether the landslide occurred or not based on the change of the differential picture of every definite period, and when it is decided that the landslide occurred, the alarm signal and the picture data are transmitted to the central device B by a transmission control part 3. The central device B receives and stores the alarm signal and the picture data, and simultaneously, displays an alarm and the picture data. Thus, even if nobody is prevent at the site of the landslide, the state of the landslide can be detected and watched.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention automatically detects the occurrence of a landslide in a designated landslide occurrence area on a road passing near a cliff slope, and immediately sends a warning signal and a gradation image. This relates to an automatic landslide monitoring device that outputs data and uses that information to quickly display road closures or make decisions on on-site response.

Conventional technology Generally, landslides are detected by stretching a piano wire along the slope where a landslide is expected, and passing a small current through the piano wire.The piano wire is severed by the landslide, and the current no longer flows. The system uses a method of detecting landslides, and the final judgment is made by having a person go to the location and check whether a landslide has occurred and whether it is dangerous to pass on the road.

Problems to be Solved by the Invention However, with the above-mentioned conventional methods, a landslide cannot be reliably detected until a person goes to the location or a report is received; There were problems such as delays in making decisions to ensure safety, such as the fact that it was impossible to judge whether the landslide was of such a magnitude that it was dangerous to pass on the road.

In order to solve the above-mentioned problems, the present invention automatically detects landslides using a television camera or other image processing device, and sends a warning signal and image data to a central device in a remote location. The object of the present invention is to provide an excellent automatic landslide monitoring device that can judge the local situation based on alarm signals and image data sent to a central device and perform appropriate processing.

Means for Solving the Problems Therefore, in order to achieve the above object, the present invention connects a terminal device and a central device via a communication line, and the terminal device includes:
An imaging unit that images the area where landslides are expected to occur, an image processing unit that detects the occurrence of landslides from image signals sent from the imaging unit, and sends warning information and image data sent from the image processing unit to the central device. The central device includes a transmission control unit for transmitting and receiving data to and from the terminal device, a means for storing alarm information and image data transmitted from the terminal device, and a means for displaying the alarm and image data. It is equipped with the means.

Effect of the present invention With the above-described configuration, the image processing unit converts the image signal of the area where landslides are expected to occur, which is imaged by the imaging unit, from analog to digital at regular intervals, and calculates the difference between the previous image and the current image. The image information is subjected to arithmetic processing, and it is determined whether or not there is a landslide based on changes in the difference images at regular intervals. When it is determined that there is a landslide, an alarm signal and image data are transmitted to the central device by the transmission control unit. The central device receives and stores the alarm signal and image data, and displays the alarm and image data.

The above-described effects have the effect that the state of a landslide can be detected and monitored without a human being at the site of the landslide.

Embodiment FIG. 1 is a diagram showing the configuration of an embodiment of the automatic landslide monitoring device of the present invention, and FIG. 2 is a diagram showing the configuration of the imaging section in this embodiment. In FIG. 1, A is a terminal device installed in an area where a landslide is expected to occur, and B is a central device connected to the terminal device A via a communication line or the like. In the terminal device A, reference numeral 1 denotes an imaging unit that constantly images the area where landslides are expected to occur and outputs image signals, and as shown in FIG.
1 and a CCD camera 1 having an electronic shutter operation function.
Consists of b. Reference numeral 2 denotes an image processing section, which processes the image signal output from the imaging section 1 and sends an alarm signal and image data to the transmission control section 3 when determining that there is a falling rock.

A transmission control section 3 transmits the alarm signal and image data sent from the image processing section 2 to the central unit B, and receives a control signal for the imaging section 1 from the central unit IIB. In the central device B, a transmission control means 4 receives the alarm signal and image data transmitted from the transmission control section 3 of the terminal device A, and transmits a control signal for the imaging section 1. , 5 is a display means, which displays the alarm and image data on the monitor 7 based on the alarm signal and image data received by the transmission control means 4. 6 is an information storage means for storing the alarm signal and image data received by the transmission control means 4, and 7 is a monitor for displaying the alarm and image data.

Next, the operation of the above embodiment will be explained. In the above embodiment, the imaging unit 1 always images the area where landslide occurrence is expected,
The image signal is sent to the image processing section 2. The image processing section 2 converts the image signal sent from the imaging section 1 from analog to digital at a certain period and records it in the memory provided in the image processing section 2. The difference image information of the gradation between the recorded image and the current image is calculated. In other words, gradation difference image information for each cycle is calculated.

Based on this information, it is determined that some kind of object has entered the imaging area when some abnormality occurs within the imaging area and a change of a certain size or more is measured in the difference image.

Here, if this is due to a vehicle entering, a change of a certain size or more will move in the next difference image, but if this is a rockfall caused by a landslide, it will be detected without moving from a fixed position. Based on the above operations, it is determined whether it is a moving vehicle or a falling rock.
If it is determined that it is a falling rock, an alarm signal and image data are sent to the transmission control section 3. The transmission control section 3 transmits the alarm signal and image data to the central device B, receives them at the transmission control means 4, stores them in the information storage means 6, and monitors the alarm and image data using the display means 5. Display on 7.

Therefore, according to the above embodiment, the imaging unit 1 constantly images the area where landslides are expected to occur, the image processing unit 2 calculates a difference image at regular intervals, and detects the occurrence of a landslide from changes in the difference images. When a landslide occurs, this information is sent to central device B, and a warning and image data are displayed on monitor 7, so people can be notified that a landslide has occurred without having to go to the site of the landslide. It has the effect of being able to make judgments.

Effects of the Invention As is clear from the above embodiments, the present invention constantly images the area where a landslide is expected to occur, and when a landslide occurs, displays a warning and image data on a monitor, so there is no need for people to go to the site. This has the effect of enabling 24-hour unmanned monitoring and making early decisions to ensure safety, such as closing vehicle traffic.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the automatic landslide monitoring device of the present invention, and FIG. 2 is a block diagram showing the configuration of the imaging section in this embodiment. A: terminal device, B: central device, 1
...imaging section, 1 a...-lens, 1
b...CCD camera, 2...image processing unit, 3...transmission control unit, 4...transmission control means, 5... Display means, 6... Information storage means, 7... Monitor

Claims (1)

[Claims] It consists of a terminal device and a central device connected by a communication line,
The terminal device includes an imaging unit that images the area where landslides are expected to occur and sends out this image signal, and converts the image signal from analog to digital at a constant cycle, and calculates difference image information between the previous image and the current image. an image processing section that detects a landslide based on changes in the difference image at regular intervals and sends out an alarm signal and image data; and a transmission control section that sends the above-mentioned alarm signal and image data to a central device. The central device includes a transmission control means for receiving the alarm signal and image data transmitted from the terminal device, an information storage means for storing the alarm signal and the image data, and an alarm and an alarm on the monitor based on the alarm signal and the image data. An automatic landslide monitoring device equipped with a display means for displaying image data.