JPH116878A - Method and device for processing earthquake observation data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for processing earthquake observation data which is capable of observing earthquake motion in high density without using much expense and work. SOLUTION: When an earthquake occurs while an observation device consisting of monitoring video-cameras 11 to 13 and photographing equipments placed in and out of various buildings including a bank and a convenience store is photographing, image data recorded with these monitoring video-cameras are sent to a calculation processing center 15 on-line. With a data processor 16 placed in the calculation processing center 15, the image date sent from each of the monitoring video-cameras 11 to 13 are analyzed into still images 18 and part of subject recorded in the image data is binarized. The moving distance of the boundary point is calculated with an operator 17 and the displacement time history of the earthquake motion at the location where the monitoring video-cameras 11 to 13 are placed is measured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing seismic observation data, and more particularly to a high-density monitoring video camera installed in a store, a station, or various buildings and outdoors. The present invention relates to a method and an apparatus for processing seismic observation data for measuring seismic intensity.

[0002]

2. Description of the Related Art Conventionally, an earthquake vibration observation system generally has a seismometer as an observation device arranged in a required area, and the data of each seismometer is transmitted to a central information center such as the Japan Meteorological Agency using a communication line. The central information management center analyzes the data by using a computer to analyze the seismometer data.The seismic intensity of the area where the seismometer is installed, the epicenter of the earthquake, its depth, and energy And so on.

By the way, at the time of an earthquake, structural damage is greatly different depending on the area even in a narrow area due to a difference in ground conditions and the like. However, the conventional seismic vibration observation system cannot observe seismic vibrations at high density due to the large interval between seismometers, and only seismic vibrations at a limited point (area) are clarified. The exact seismic oscillations in the area are often unknown.

In general, as a method of estimating wide-area seismic vibration including an area where a seismometer is not installed, a method of investigating a falling state of a tombstone and estimating a seismic intensity at each point, and a posteriori A method of estimating the seismic intensity at each point by conducting a questionnaire survey, or a method of estimating the movement of objects and human behavior from images recorded on store security video cameras etc. against the JMA seismic intensity floor is known. ing.

[0005]

As described above, in the conventional seismic vibration observation system, the place where the seismometer is installed is limited.
In addition, because of the wide interval, seismic vibration cannot be observed at high density, and the seismic vibration at a specific position is often unknown. Therefore, rapid high-density observation of seismic vibration has been desired.

[0006] For quick and high-density observation of seismic oscillations, it is simply necessary to install a large number of seismometers densely throughout the country. However, this method requires installation of a huge number of seismometers. However, there is a problem that it requires a great deal of labor and cost, and it is very difficult to realize.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide an earthquake observation data processing system capable of observing earthquake vibrations at high density without incurring much cost and labor. It is to provide a method and an apparatus.

[0008]

SUMMARY OF THE INVENTION The present invention is a method for processing earthquake observation data, and is configured as follows to solve the above-mentioned technical problem. In other words, if an earthquake occurs while an observation device consisting of surveillance cameras and imaging devices installed inside and outside buildings, including banks and convenience stores, is shooting, image data recorded by this observation device Is sent to a calculation processing center, and the image data sent from each of the observation devices is decomposed into a still image by a data processing device installed in the calculation processing center, and a part of a subject recorded in the image data. Is binarized, and the arithmetic unit calculates the moving distance of a certain point of the subject to measure the time history displacement of the seismic vibration at the place where the observation device is installed.

In such an earthquake observation data processing method, as a method of transmitting image data recorded by the observation device to the calculation processing center, there are a method of transmitting the data online and a method of transmitting the image data offline.

[0010] A video camera can be used as the surveillance camera or the imaging device.
An oscillating body installed within the shooting range of the surveillance camera can be included. The swinging body in this case may be any body that swings by vibration, and examples thereof include a body that is suspended by a thread and swings like a pendulum or a spring body that swings by vibration. By using such an oscillator,
More precise analysis of vibrations becomes possible.

As a reference point to be the subject, a relatively small projection provided on a wall or the like is suitable, but other subjects include various objects such as a person and an object. In other words, any object that can be used in the image recorded at the time of the occurrence of the earthquake can be used as the subject.

Further, a vibration measuring sensor capable of measuring a minute shaking of an earthquake is installed in an observation device such as the monitoring camera,
Modulate a measurement signal generated from the vibration measurement sensor that senses the minute shaking of the earthquake, record the modulated measurement signal on a recording medium such as a video tape for recording an image of the monitoring video camera, and record the recorded measurement signal. The method may include a process of analyzing the measurement signal. This recording can be performed using the audio track of a video tape. In this case, the measured electric signal is modulated into an audio band and recorded. When analyzing this, the degree of the original vibration is grasped by solving this modulation.

[0013] From the above-mentioned oscillating body or vibration measuring sensor, data can be collected even for a minute earthquake which is difficult to be captured only from an image of a normal subject.

Further, the seismic observation data processing apparatus of the present invention is configured as follows to solve the above technical problem. That is, this apparatus is composed of a number of observation devices including surveillance video cameras and imaging devices installed inside and outside various buildings including banks and convenience stores, and one or some of these many observation devices.
A communication processing unit that transmits a signal of image data in the observation device of each group to a calculation processing center, and decomposes the image data of each observation device transmitted from the communication processing unit in each group into a still image. A data processing device installed in the calculation processing center for binarizing a part of a subject recorded in the image data, and a moving distance of the subject in the still image data processed by the data processing device And an arithmetic unit installed at the calculation processing center to perform the calculation processing.

This observation device can be provided with a vibration measuring sensor capable of measuring a minute shaking of an earthquake. This vibration measurement sensor can be fixed and installed directly on the side wall or the like inside or outside the monitoring camera. That is, this sensor may be incorporated in any place in the surveillance camera in any manner.

According to the seismic observation data processing method of the present invention, image data captured by observation devices such as surveillance video cameras and imaging devices installed inside and outside various buildings including banks and convenience stores is used. . That is, the communication processing unit transmits image data recorded by an observation device including a surveillance video camera and an imaging device installed in various buildings to the calculation processing center.

Thereafter, the image data sent from each of the observation devices is decomposed into still images by a data processing device installed in the calculation processing center. Then, a part of the subject recorded in the data of each of these still images is binarized. The motion of the subject in the image data binarized in this way, that is, the moving distance, is calculated by the arithmetic unit, and the time history displacement of the seismic vibration at the place where each observation device is installed is thereby measured.

In this observation device, as described above,
It is possible to install a vibration measurement sensor that can measure the minute shaking of an earthquake. In addition, an oscillating body such as a pendulum can be installed in the imaging range of this observation device, as described above.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the illustrated embodiment of the method and apparatus for processing earthquake observation data of the present invention will be described in more detail. FIG. 1 shows an earthquake observation data processing apparatus 10 according to an embodiment of the present invention.

The earthquake observation data processing apparatus 10 according to this embodiment is provided with observation apparatuses such as surveillance video cameras 11, 12, and 13 installed in various buildings including, for example, banks and convenience stores and at various places outdoors. I have. That is, the surveillance video camera 11 is a security video camera installed in a certain bank store, the surveillance video camera 12 is a security video camera installed in a certain convenience store, and the surveillance video camera 13 is installed on a telephone pole or the like. Traffic surveillance video camera. FIG. 2 shows an enlarged photographing state of a subject (marker) by the security video camera.

The surveillance video cameras 11, 12,
A pendulum 20 can be attached to each of the 13 as shown in FIG. The pendulum 20 is installed so as to be located within the shooting range of the video camera 11 via a mounting bar 21 fixed so as to protrude from the upper end surface of the main body of the video camera 11. The pendulum 21 has a spherical weight attached to the lower end of a piano wire. A plurality of pendulums having different weights may be installed.

These three surveillance video cameras 11, 1
The surveillance video cameras 11 to 13 in this group include one communication processing device 1.
4 is connected. The communication processing device 14 transmits the image data signals from the surveillance video cameras 11 to 13 in this group to the calculation processing center 15 when an earthquake occurs.
Send to

A data processing device 16 is installed in the calculation processing center 15, and this data processing device 16
The image data of each of the monitoring video cameras 11 to 13 transmitted from the communication processing device 14 in each group is decomposed into still images, and a part of the subject recorded in the image data is binarized. This image data includes the swing of the pendulum.

Further, an arithmetic unit 17 is connected to the data processing unit 16, and the arithmetic unit 17 is connected to the subject (for convenience of explanation) in the still image data 18 processed by the data processing unit 16 as shown in FIG. , The subject is marked
9) is calculated. This measurement principle is based on an observation device that receives an earthquake vibration, that is, in this embodiment, image data of a subject captured by surveillance video cameras 11 to 13.
The image is decomposed into still images every 1/60 second by the data processing device 16, and a part of the image is binarized (replaced with binary data). The degree to which the still image is decomposed is arbitrary, but it is appropriate to decompose it into still images every 1/30 to 1/60 seconds.

Next, a boundary point as a fixed point of the subject,
That is, a point in the recorded image, for example, a relatively clear contrast such as an edge of a pillar or a beam, a part of an object suspended from a ceiling, or an edge of an object installed indoors and outdoors. The amount of movement of a point (which may be one point or a plurality of points) is read by the arithmetic unit 17 based on the size of an image element (pixel), and is converted into a displacement amount, thereby obtaining FIG.
The time history displacement of the vibration is obtained as shown in FIG. Here, the measurement accuracy of the displacement is the size of the real image corresponding to the image element, but this seismic observation data processing method focuses on the point that continuous images can be obtained, and improves the measurement accuracy by statistical processing Let me.

Then, based on the time history displacement obtained by the measurement process (FIG. 4A), the surveillance video camera as shown in FIG. 4B and the vibration characteristics of the building or telephone pole to which it is attached are inversely analyzed. In consideration of the vibration characteristics, the time history displacement of the input vibration due to the earthquake is calculated and inversely analyzed as shown in FIG. 4c. Note that the communication processing device 14, the data processing device 16, and the arithmetic device 17
Is configured by a computer.

The movement of the pendulum 20 is analyzed from the difference between the image data before and after, and the input vibration is inversely analyzed from the obtained displacement data of the pendulum 20. By capturing the vibration of the pendulum 20 in such an image, it is possible to reliably recognize a relatively small earthquake vibration that is difficult to grasp from a part of the image of the building.

As is apparent from the above description, the method and apparatus for processing earthquake observation data according to the present embodiment use imaging devices such as security video cameras and surveillance video cameras already installed in various places in the city. Can be. Since the vibration of the earthquake is measured using the image data from these observation devices, it is possible to obtain a high-density and quick observation result of the earthquake vibration at a low cost.

Further, in the method and apparatus for processing earthquake observation data according to this embodiment, image data of a subject shown in each observation apparatus (surveillance video camera or the like) is, for example, 1/30 to 1
/ The image is decomposed into still images every 60 seconds, a part of the image is binarized, and the time history displacement of the seismic vibration is observed based on the moving distance of the boundary point. The time history displacement amount of the vibration can be obtained.

In the above-described method for processing earthquake observation data according to one embodiment of the present invention, the image data recorded by the observation device is transmitted online when it is transmitted to the calculation processing center. The transmission method is not limited to this, and it goes without saying that the transmission may be performed offline.

[0031]

As described above, according to the method and apparatus for processing earthquake observation data according to the present invention, image data from an observation device including imaging devices such as security video cameras and surveillance video cameras installed at various locations. Since the seismic vibration is measured by using the method, the seismic vibration can be quickly observed at high density without much cost and labor.

Further, according to the method and apparatus for processing earthquake observation data of the present invention, the image data of the subject shown in each observation device is decomposed into a still image, a part of which is binarized, and the boundary point of the subject, that is, Since the time history displacement of the seismic vibration is observed based on the moving distance of the fixed point, the time history displacement of the seismic vibration can be obtained simply and accurately.

Further, by adding a vibration measuring sensor to the surveillance camera, there is an advantage that minute seismic vibrations can be efficiently recorded using a recording medium which is constantly operated and recorded.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory diagram showing a configuration of an earthquake observation data processing device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing, in an enlarged manner, a state in which a security video camera, which is an observation device constituting the earthquake observation data processing device shown in FIG.

FIG. 3 is an explanatory diagram showing a displacement state of a reference point, which is a subject, in a still image captured by the security video camera shown in FIG. 2 when an earthquake occurs.

FIG. 4 is an explanatory diagram illustrating a measurement principle of calculating and processing a moving distance of a subject in still image data in the earthquake observation data processing apparatus according to the embodiment of the present invention.

FIG. 5 is an explanatory view showing a state in which a pendulum is attached to the security video camera.

[Explanation of symbols]

 Reference Signs List 10 Seismic observation data processing device 11 Surveillance video camera (observation device) 12 Surveillance video camera (observation device) 13 Surveillance video camera (observation device) 14 Communication processing device 15 Calculation processing center 16 Data processing device 17 Arithmetic device 18 Still image data 19 Marking point (subject)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G01V 8/10 G01V 11/00 11/00 9/04 S G06T 1/00 G06F 15/62 380 (72) Inventor Yoshito Saito 2-10-26 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Inventor Atsushi Sudo 2-231-1, Nishi-Shimbashi, Minato-ku, Tokyo Co., Ltd.

Claims (7)

[Claims] 1. When an earthquake occurs while an observation device including a monitoring camera and an imaging device installed in various buildings including a bank and a convenience store and outside is recording an image, the observation device records the image. The image data sent from each of the observation devices into a still image by a data processing device installed in the calculation processing center, and a subject recorded in the image data. Is binarized, and the arithmetic unit calculates the moving distance of a certain fixed point of the subject to measure the time history displacement of the seismic vibration at the place where the observation device is installed. Seismic observation data processing method. 2. When an oscillating body is installed in various buildings including a bank and a convenience store and within a shooting range of a video camera installed outdoors, and an earthquake occurs while the video camera is shooting. Sending the image data recorded by the video camera to a calculation processing center, and decomposing the image data sent from each of the observation devices into a still image by a data processing device installed in the calculation processing center, and A part of the subject recorded in the data is binarized, and the arithmetic unit calculates the moving distance of a certain fixed point of the subject to calculate the time history displacement amount of the earthquake vibration at the place where the observation device is installed. An earthquake observation data processing method characterized by measuring. 3. The earthquake observation data processing apparatus according to claim 2, wherein a suspended weight is installed within an imaging range of the observation apparatus. 4. A vibration measurement sensor capable of measuring a minute shaking of an earthquake is attached to the observation device, and a measurement signal generated from the vibration measuring sensor that senses the minute shaking of the earthquake is converted into an image of the surveillance video camera. The method according to any one of claims 1 to 3, further comprising a process of recording on a recording medium for recording and analyzing the recorded measurement signal. 5. A large number of observation devices including monitoring cameras and imaging devices installed inside and outside various buildings including banks and convenience stores, and one of these multiple observation devices.
One or several of them as one group, a communication processing unit for transmitting a signal of image data in the observation device of each group to a computation processing center, and image data of each observation device transmitted from the communication processing unit in each group Into a still image, a data processing device installed in the calculation processing center to binarize a part of a subject recorded in the image data, and the still image processed by the data processing device. An earthquake observation data processing device comprising: an arithmetic device installed at the calculation processing center for calculating the moving distance of the subject in the data. 6. The earthquake observation data processing apparatus according to claim 5, wherein a vibration measurement sensor capable of measuring a minute shaking of the earthquake is installed in the observation apparatus. 7. The seismic observation data processing device according to claim 5, wherein an oscillating body is installed within an imaging range of the observation device.