JPH11352247A - Natural disaster occurrence detecting device and method therefor, and avalanche occurrence detecting device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and speedily detect whether or not a natural disaster such as an avalanche have occurred and its scale. SOLUTION: This avalanche occurrence detecting device is equipped with a shocked body 1, a signal converter 2 which processes a detection signal outputted from a vibration sensor, an arithmetic processing part 3 which decides whether or not an avalanche occurs from the output of the signal converter 2 and decides the scale of the avalanche, a communication processing part 4 which sends the analytic result of the arithmetic processing part 3 by wire or wireless, and an information output part 5 which displays information regarding the avalanche and gives an alarm, etc., by receiving the data sent from the communicating processing part 4. The shocked body 1 is made of a lightweight ball and has vibration sensors inside. Those vibration sensors are different in sensitivities from each another and output pulses, when detecting vibration. The arithmetic processing park 3 decides whether or not an avalanche has occurred and its scale from the kind of a vibration sensor, whose number of pulses exceeds a threshold and for how long a period the threshold is exceeded continuously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for automatically detecting occurrence of a natural disaster such as an avalanche and promptly issuing a warning when a natural disaster occurs.

[0002]

2. Description of the Related Art There has been proposed an avalanche alarm device for regulating railway operation when an avalanche occurs. FIG. 6 is a diagram illustrating a conventional avalanche warning device. Mount or fence 31
A wooden board 33 on which a copper wire 32 is wound is attached to the upper part of the board.

When an avalanche occurs and the illustrated copper wire 32 is cut by the avalanche, an avalanche detection circuit (not shown) connected to the copper wire 32 is cut off and an alarm is issued. The device shown in FIG. 6 has a feature that the detection range is wide because an avalanche can be detected over the entire length of the sensor.

[0004]

However, in the case of the apparatus shown in FIG. 6, since it is not determined that an avalanche has occurred unless the copper wire 32 is cut, a small avalanche cannot be detected. Further, when the copper wire is buried in the snow, detection of the avalanche itself becomes impossible. Furthermore, when buried, the copper wire is cut due to the sedimentation force of the snow and the detection may be erroneous. The present invention
The purpose of the present invention is to provide a natural disaster occurrence detection device and an avalanche occurrence detection device capable of accurately and quickly determining whether or not a natural disaster such as an avalanche has occurred and its scale with a simple configuration. A method for detecting a natural disaster occurrence and a method for detecting an avalanche occurrence.

The gist of the present invention is to provide an impacted object having a detecting means for detecting a vibration, a judgment on whether or not a natural disaster has occurred based on the detected vibration. There is provided a natural disaster occurrence detection device, comprising: an analysis unit that determines the scale of a natural disaster; and an information output unit that outputs information on a result of the determination by the analysis unit. The gist of the invention according to claim 2 is that an impacted body having a detecting means for detecting vibration, and an analyzing means for determining whether an avalanche has occurred and determining the size of the avalanche based on the detected vibration. Information output means for outputting information on a result of the determination by the analysis means, wherein the detection means has a vibration sensor for outputting a pulse when vibration is detected, and wherein the analysis means When the number of pulses output from
An avalanche occurrence detection device is characterized by determining that an avalanche has occurred. The gist of the invention according to claim 3 is that the detection means has a plurality of vibration sensors having different sensitivities, and the analysis means sets a threshold value for each of the plurality of vibration sensors, and sets at least one vibration sensor. The avalanche occurrence detecting device according to claim 2, wherein when the sensor exceeds a threshold value, it is determined that an avalanche has occurred. The gist of the invention according to claim 4 is that the analysis means determines the size of the avalanche based on the type of the vibration sensor exceeding the threshold and the time continuously exceeding the threshold. An avalanche occurrence detecting device according to claim 3. The gist of the invention according to claim 5 is that the impacted body is a pole-shaped member having one end fixed, and the vibration sensor is configured to change according to the installation strength of the impacted body. 3. The battery according to claim 2, wherein
4. The avalanche occurrence detection device according to any one of 4. The gist of the invention according to claim 6 is to determine whether or not a natural disaster has occurred and to determine the scale of the natural disaster based on the vibration detected by the detecting means of the impacted body, and to provide information on these determination results. The present invention provides a method for detecting the occurrence of a natural disaster characterized by outputting. The gist of the invention according to claim 7 is that when the number of vibration detection pulses output from the vibration sensor of the impacted object exceeds a predetermined threshold value within a predetermined time, it is determined that an avalanche has occurred, and the sensitivity of the sensor is determined. The avalanche occurrence detection method is characterized in that the avalanche occurrence is determined based on whether the number of vibration detection pulses has been detected and the number of vibration detection pulses continuously exceeds the threshold value.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A natural disaster occurrence detection device and an avalanche occurrence detection device according to the present invention will be specifically described below with reference to the drawings. Hereinafter, the avalanche occurrence detection device will be mainly described.

FIG. 1 is a block diagram showing a schematic configuration of an avalanche occurrence detecting device according to the present invention. The apparatus shown in FIG. 1 includes an impacted body 1 having a built-in vibration sensor, a signal converter 2 for performing signal processing on a detection signal output from the vibration sensor, and an avalanche occurring based on the output of the signal converter 2. And a communication processing unit 4 for transmitting the analysis result of the calculation processing unit 3 wirelessly or by wire, and a data transmitted from the communication processing unit 4. Information output unit 5 that receives and displays information on avalanches and performs warnings, etc.
And

FIG. 2 is a view showing the appearance of the impacted body 1.
As shown in the figure, the impacted body 1 is formed of a light pole and has a built-in vibration sensor 6. The vibration sensor 6 is a small and light (about 1.6 g) ON / OFF sensor, as described later, and outputs a pulse when vibration is detected.

The impacted body 1 is fixed to an existing structure such as an avalanche protection fence, a tree, or the like, or a pile capable of sufficiently withstanding the slope snow pressure is mounted on the slope in order to prevent destruction or lodging due to snow pressure on the slope. It is desirable to install and fix it to the pile.

FIG. 3 is a diagram showing the internal structure of the vibration sensor 6. The vibration sensor 6 of FIG. 3 includes a U-shaped upper member 11 made of a conductive material and a lower member 12 made of a conductive material.
Are fixed by an insulating member 13, and a spherical member 14 made of a conductive material is movably mounted on the upper surface of the lower member 12. The vibration sensor 6 is an existing one.

When the vibration sensor 6 is placed on a horizontal plane, as shown in FIG.
2 is electrically insulated, and the vibration sensor 6 is off. When the impacted body 1 vibrates and the vibration sensor 6 tilts by a predetermined angle (operating angle D) or more, as shown in FIG.
The spherical member 14 comes into contact with both the upper member 11 and the lower member 12, and the upper member 11 and the lower member 12 conduct, the vibration sensor 6 is turned on, and a vibration detection pulse is output.

Further, even if the vibration sensor does not incline beyond the operating angle, a vibration detection pulse is output even when the vibration sensor receives a vibration with a frequency and amplitude that are not less than a certain value. In any case, as the impacted body receives a strong impact for a long time, more vibration detection pulses are output. Further, in any case, a vibration sensor having a smaller operation angle outputs a vibration detection pulse with a smaller impact.

The arithmetic processing unit 3 shown in FIG. 1 measures the number of pulses output from the vibration sensor 6 within a predetermined time, and determines that an avalanche has occurred when the number of pulses exceeds a predetermined threshold. I do. The threshold value is set because a vibration detection pulse is temporarily output when an animal such as a bird stays on the impacted object 1 or when snow falls from a tree, and an avalanche occurs in such a case. This is in order not to judge incorrectly.

A plurality of vibration sensors 6 having different sensitivities, that is, different operating angles are built in the impacted body. FIG. 4 shows an example in which five types of vibration sensors 6 having different sensitivities are provided and avalanche detection is performed. For each vibration sensor 6, a vibration detection pulse output within a predetermined time Δt and an integrated value of the pulse are shown. Is represented. The dotted line in the figure is a predetermined threshold.

By the way, since a sensor having a smaller operation angle D has a higher sensitivity, a pulse is output even with a slight vibration. For this reason, even a small avalanche can be detected. On the other hand, a sensor having a larger operation start angle D has a lower sensitivity, so that a vibration detection pulse is not output unless a considerable vibration is received, so that only a relatively large avalanche can be detected.

Therefore, the arithmetic processing unit 3 shown in FIG. 1 determines the type of the vibration sensor 6 in which the pulse integrated value has exceeded the threshold value and the time in which the pulse integrated value has continuously exceeded the threshold value.
Judge the occurrence of avalanche and the size of the avalanche. For example, FIG.
Shows an example in which the operation angle D exceeds the threshold value up to the vibration sensor 6 of 40 degrees. In this case, for example, it is determined that a medium-scale avalanche has occurred.

FIG. 5 is an external view of an avalanche occurrence detecting device.
An example of installation along a railway is shown. In FIG. 5, the impacted bodies 1 are installed at predetermined intervals on each of the avalanche protection retaining wall 21 and the avalanche protection fence 22, and the signal converter 2 and the arithmetic processing unit 3 are provided.
To the housing 24 on the pole 23 installed near the impacted body.
It shows an example of being stored inside.

The result of vibration detection by the vibration sensor 6 built in the impacted body 1 is sent to the arithmetic processing unit 3 in the housing 24 by wire. The signal indicating the analysis result by the arithmetic processing unit 3 is sent to the wireless repeater 26 by wire or wireless (the wired antenna 25 in the present embodiment), and from the wireless repeater 26 to the monitoring station via a wired circuit. The information output unit 5 in the monitoring station 27 issues a warning or the like.

As described above, in the present embodiment, since the presence or absence of the occurrence of an avalanche is determined by the vibration sensor 6 incorporated in the impacted body 1 made of a pole-shaped member, the entire apparatus can be downsized, and the structure is complicated. And can be made of inexpensive materials,
It is possible to obtain more reliable and useful information than conventional devices.

Further, in order to determine whether or not the number of vibration detection pulses output from the plurality of vibration sensors 6 exceeds a threshold value, and to continuously measure the time when the number of vibration detection pulses exceeds the threshold value,
In addition to determining whether an avalanche has occurred, it is also possible to accurately and quickly determine the scale of an avalanche. For this reason,
According to the present embodiment, it is possible to accurately and promptly determine whether or not to restrict railway operation and road traffic in snowy areas.

Further, by transmitting the information output from the present apparatus to a railway or road management point by wire or wirelessly, it is possible to perform an accurate regulation and to quickly perform inspection and snow removal work.

Further, by transmitting and receiving data between the apparatus and a railway signal device, a special signal light emitting device, a road information board, a roadside broadcast device, etc., it is possible to contribute to the safe running of trains and vehicles. In addition to this, the present device is also useful for safety management of a ski slope where an avalanche disaster has frequently occurred in recent years, and a civil engineering work site in an avalanche danger area.

The present apparatus can be applied not only for detecting the occurrence of an avalanche but also for monitoring various natural disasters such as debris flow, landslides, and falling rocks.

In the above-described embodiment, an example in which a threshold value is set for each of the plurality of vibration sensors 6 has been described. However, it is possible to arbitrarily change the threshold level according to an instruction from the arithmetic processing unit 3. Good. As a result, the threshold value can be changed from time to time, and finer grained control can be performed.

The present device may be combined with the conventional avalanche alarm device shown in FIG.

[0025]

As described above in detail, according to the present invention, it is determined whether or not a natural disaster such as an avalanche has occurred based on the vibration detected by the detecting means of the impacted body and the natural disaster has been detected. Since the scale is determined, the configuration of the entire apparatus can be reduced in size and weight, and a disaster prevention system can be constructed at low cost. In addition, a plurality of vibration sensors are used as detection means, and it is determined whether or not the number of vibration detection pulses output by the plurality of vibration sensors has exceeded a threshold value, and the time during which the threshold value is continuously exceeded is measured. As a result, not only can the presence or absence of the occurrence of an avalanche be determined accurately, but also the scale of the avalanche can be determined accurately.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an avalanche occurrence detection device according to the present invention.

FIG. 2 is a view showing the appearance of an impacted body.

FIG. 3 is a diagram showing an internal structure of the vibration sensor.

FIG. 4 is a diagram showing an example in which five types of vibration sensors having different sensitivities are provided to perform vibration detection.

FIG. 5 is an image diagram of an on-site installation of an avalanche occurrence detection device.

FIG. 6 is a diagram illustrating a conventional avalanche alarm device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Impacted object 2 Signal converter 3 Arithmetic processing part 4 Communication processing part 5 Information output part 6 Vibration sensor 11 Upper member 12 Lower member 13 Insulating member 14 Spherical member 21 Avalanche protection retaining wall 22 Avalanche protective fence 23 Pole 24 Housing 25 antenna 26 wireless repeater 27 monitoring station

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshige Fujii 38-8 Hikaricho, Kokubunji-shi, Tokyo 38 Within Railway Technical Research Institute

Claims (7)

[Claims] An impacted object having a detecting means for detecting a vibration; an analyzing means for determining whether a natural disaster has occurred and a scale of the natural disaster based on the detected vibration; A natural disaster occurrence detection device, comprising: an information output unit that outputs information on a result of the determination by the analysis unit. 2. An impacted object having a detecting means for detecting vibration, an analyzing means for judging the presence or absence of an avalanche and judging a scale of the avalanche based on the detected vibration; Information output means for outputting information on the determination result, wherein the detection means has a vibration sensor for outputting a pulse when vibration is detected, and the analysis means comprises a pulse output from the vibration sensor within a predetermined time. An avalanche occurrence detecting device, which determines that an avalanche has occurred if the number exceeds a predetermined threshold value. 3. The detecting means includes a plurality of vibration sensors having different sensitivities, and the analyzing means sets a threshold value for each of the plurality of vibration sensors, and at least one of the vibration sensors determines a threshold value. The avalanche occurrence detection device according to claim 2, wherein when the value exceeds the threshold, it is determined that an avalanche has occurred. 4. The avalanche according to claim 4, wherein said analyzing means determines a scale of the avalanche based on a type of said vibration sensor exceeding a threshold value and a time continuously exceeding said threshold value. Item 4. The avalanche occurrence detection device according to Item 3. 5. The impacted body is a pole-shaped member having one end fixed, and the vibration sensor is mounted inside the impacted body so as to change according to the installation strength of the impacted body. The avalanche occurrence detection device according to any one of claims 2 to 4, wherein: 6. A method for determining whether a natural disaster has occurred and determining the scale of the natural disaster based on the vibration detected by the detecting means of the impacted body, and outputting information on the results of these determinations. A method for detecting the occurrence of natural disasters, characterized in that: 7. When the number of vibration detection pulses output from a vibration sensor of an impacted object exceeds a predetermined threshold value within a predetermined time, it is determined that an avalanche has occurred, and to what sensitivity the sensor has been detected. An avalanche occurrence detection method, characterized in that the avalanche scale is determined based on the time when the number of the vibration detection pulses continuously exceeds the threshold value.