JP2000039342A - Measuring probe used for debris flow detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect in advance the occurrence of debris flow and exactly detect the occurrence, the occurrence range, the flowing direction and velocity of debris flow in the case of occurrence of debris flow. SOLUTION: A debris flow detection system is placed by inserting measuring probes 3, 3, 3... transmitting data concerning placed position, direction, angle, etc., detected by various sensor and the direction and velocity of displacement at the moment when a specific acceleration is added into a plurality of measuring points in mountainside 1. With receivers of observation station 4 placed in a location apart from the measuring probes 3, 3, 3..., signal transmitted from each probe is received and the measured data of each measuring probe is recorded with a recording device. The information is indicated on a display 6a of a personal computer 6 and alarm is generated by an alarm device 7 when the displacement exceeds a predetermined value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a debris flow detection system and a measurement probe used therein.

[0002]

BACKGROUND OF THE INVENTION Debris flows, once they occur, cause catastrophic disasters. For this reason, if the occurrence of debris flow is detected in advance, and once it occurs, the damage can be reduced if it can be accurately detected that the occurrence has occurred, its range, and the direction and speed at which it flows down .

[0003] For this reason, there has been a demand for a detection system which can accurately perform all of these detections and which can easily install measuring instruments at a plurality of measurement points on the hillside. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to detect the occurrence of a debris flow in advance and, when the debris flow occurs, to prevent the occurrence of the debris flow. A debris flow detection system that can accurately detect the range and the flowing direction and speed of the debris, and can easily install measuring instruments at a plurality of measurement points on a hillside. It is.

Another object of the present invention is to provide a measurement probe which is installed at a measurement point on a hillside suitable for use in the debris flow detection system.

[0006]

According to the debris flow detection system of the present invention, the installation position, direction, angle, etc., detected by various sensors, and the direction and speed of displacement when a predetermined value of acceleration is applied. The measurement probe for transmitting the data relating to the observation base station to be described later by a radio signal is installed by inserting it into a plurality of measurement points on the hillside, and the reception device of the observation base station installed in a safe place away from each of the measurement probes has A wireless signal transmitted from the measurement probe is received, and measurement data of each measurement probe is recorded by a recording device.

In the above system, a map of a hillside may be displayed on a display of a personal computer so as to overlap a position or a displacement state of each measurement probe based on measurement data of each measurement probe.

In this way, the information can be confirmed at a glance, and the subsequent response can be performed quickly and without error.

In the above-mentioned system, an alarm device for issuing an alarm by sound or character when the displacement of the measurement probe exceeds a predetermined value may be provided.

In this manner, the occurrence of debris flow can be clearly notified, and a delay in response can be prevented.

Next, a measurement probe according to the present invention suitable for use in the above system will be described. The measurement probe is a closed cylindrical capsule having a sharp tip made of a material that is not easily damaged, a GPS antenna and a radio transmitting / receiving antenna provided on the head of the capsule, and a GPS receiving device provided in the capsule. An azimuth sensor, an angular acceleration sensor, an X-axis acceleration sensor that takes horizontal X-axis displacement data, a Y-axis acceleration sensor that takes horizontal Y-axis displacement data, a Z-axis acceleration sensor that takes vertical displacement data, and the X-axis acceleration sensor. A displacement extraction circuit connected to each of the Y-axis acceleration sensors, a comparator that compares the value of the displacement by the displacement extraction circuit with a preset activation level for activating all devices, and a central control device described below. When connected to a power controller that connects and inputs a start trigger based on the comparison result by the comparator, , A timer controller connected to the power controller, a battery connected to the power controller, and each of the GPS receiver, the direction sensor, the angular acceleration sensor, the X-axis acceleration sensor, the Y-axis acceleration sensor, and the Z-axis acceleration sensor. And a central control device connected to the interface, a data storage device connected to the central control device, and a wireless transmission / reception device connected to the central control device.

Further, a temperature sensor for obtaining temperature data in the measurement probe may be connected to an interface.

In this way, it is possible to clearly confirm the temperature at each of the installed measurement points on the hillside and the temperature at the current position when displaced by debris flow.

Further, since the measuring probe is installed by being directly inserted into the ground at the measuring point by a person, the measuring probe may be used in a steep part of a hillside which is difficult for a person to approach or when there is a risk of a secondary disaster. It is difficult to install this.

In such a case, a measurement probe with an adapter is used. Thus, the measuring probe is made of a material which is hard to be damaged, and is provided with an underground insertion pin at the tip and an impact tip on the tip side in a cylindrical case provided with a stable wing along the axial direction on the side of the head. The measurement probe main body is fitted with the absorption gel filled.

The measurement probe is dropped from the helicopter or the like into the air and is protruded to a measurement point, and can be safely installed even in the case described above. Since the shock absorbing gel is filled at the tip end in the case, it is possible to effectively prevent the measurement probe main body fitted in the inside of the case from being damaged by a drop impact. In addition, since the case is provided with the stabilizing wing, it can be lowered in a substantially vertical state, so that the measurement probe can be pushed up substantially straight on the ground.

In the above-mentioned measuring probe, a basket-like collecting tool which can be hooked and collected from a helicopter or the like by a hook may be attached to the head of the case via a wire. This makes it possible to collect by a helicopter or the like when collecting by pulling it out from the installation point or when collecting from the site when it flows out due to debris flow, thereby facilitating the collection work.
Also, it can be safely recovered because it is pulled out from the sky by helicopter or the like.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a debris flow detection system.

In the figure, 1 is a hillside, and 1A, 1B, 1
C, 1D, 1E and 1F are measurement points set at substantially equal intervals as a whole in a predetermined area on the hillside. In this embodiment, the number of measurement points is six, but may be increased or decreased.

Reference numeral 2 denotes a GPS satellite. Reference numerals 3, 3, 3,... Denote measurement probes inserted into the measurement points 1A to 1F on the hillside. The measurement probes 3, 3, 3,... Are configured in detail later, and wirelessly transmit data relating to the installation position, direction, angle, etc. detected by various sensors, and the direction and speed of displacement when a predetermined value of acceleration is applied. It is transmitted to the observation base station described later by a signal.

Reference numeral 4 denotes an observation base station installed in a safe place away from each of the measurement probes 3, 3, 3,... The observation base station 4 receives a radio signal transmitted from each of the measurement probes 3, 3, 3,... By a receiving device (not shown), and receives each of the measurement probes 3, 3, by a recording device (not shown). , 3
.. Are recorded. Reference numeral 5 denotes a wireless transmitting / receiving antenna. A personal computer described later may be used as the recording device.

The basic configuration of the main rock debris flow detection system is established as described above. In the embodiment shown in FIG. 1, the display 6a of the personal computer 6 further displays a map of the hillside 1 and each of the measurement probes 3, 3, and 3. The position and displacement state of each measurement probe based on the measurement data of 3... Are displayed in an overlapping manner.

Further, the embodiment shown in FIG. 1 is provided with an alarm device 7 which issues an alarm by sound when the displacement of the measuring probes 3, 3, 3... Exceeds a predetermined value.

According to the debris flow detection system, the measurement data periodically transmitted wirelessly from each of the measurement probes 3, 3, 3,...
If there is data indicating that the probe is slightly displaced from the measurement probes 3, 3, and 3 installed on B, 1D, and 1E, it indicates that the probe is located on the ground in the range where the measurement probes 3, 3, and 3 are installed. Is displaced, and it is possible to recognize that debris flow may occur.

Also, the displacement of the ground increases,
For example, when acceleration of a predetermined value is applied to the measurement probes 3, 3, and 3 installed at the measurement points 1B, 1D, and 1E,
The measurement probes 3, 3, 3 wirelessly transmit data on the direction and speed of the displacement to the observation base station 4.

Thus, it is possible to clearly recognize that the debris flow has actually occurred, the range in which the debris flow has occurred, and the direction and speed at which the debris flow flows.

The present invention, in addition to the above points, can be installed by simply inserting the measurement probe into the ground, and since the measurement data is transmitted by a radio signal, the displacement of the ground as in the prior art can be measured. There is no need to draw a cable or the like for signal transmission between each sensor to be detected and the observation base station. Therefore, the installation work can be easily and quickly completed. Further, the displacement range is not limited to the cable, and the range in which the radio wave reaches can be measured.

The specific configuration of the measuring probe used in the main body debris flow detection system is as described below. An example of the operation in the case of using the measuring probe will be described below. In the following operation, the measurement probe must use a battery as a power supply, and therefore it is necessary to minimize the power consumption in order to operate the probe for as long a time as possible. It has been done.

For 48 hours after the measurement probes 3, 3, 3,... Are installed at each measurement point, all the measurement values are transmitted to the observation base station 4 once every hour from each measurement probe. During this time, the observation base station acquires information such as the position of the measurement probe.

After a lapse of 48 hours from the installation, each of the measurement probes 3, 3, 3... Enters a sleep standby state. In this state, only the X-axis acceleration sensor and the Y-axis acceleration sensor are turned on. .

After that, the measurement probes 3, 3, 3... Periodically transmit the data to the observation base station 4 every 48 hours.

When acceleration of 0.01 G (temporary set value) is applied to the measurement probes 3, 3, 3,... In the sleep standby state, power is immediately supplied to all devices in the measurement probes. , And continuously transmits the measurement data to the observation base station 4. This will cause debris flow and
The generated area, the direction and speed at which the debris flow flows down are detected.

The measurement probes 3, 3, 3,... Continue transmitting measurement data until a certain time has elapsed even after the acceleration is no longer detected. After that, the sleep standby state is set again.

When data is transmitted from the measurement probes 3 to the observation base station 4, the observation base station 4
When the answer back indicating that the transmission from the server has been received is not obtained, a beacon is transmitted together with the position data every 10 minutes. Thus, when the debris flow occurs and the measurement probe flows out, the measurement probe can be easily collected.

Next, a measuring probe suitable for the debris flow detection system will be described. FIG. 2 is a perspective view of a measurement probe in which a frame is partially cut away, and FIG. 3 is a circuit block diagram of the measurement probe.

Reference numeral 3 denotes a measurement probe used in the debris flow detection system. Reference numeral 8 denotes a cylindrical frame having a sharp tip made of a material that is not easily damaged. In this embodiment, the frame 8 has a main body 8a made of reinforced plastic (FRP) and a tip 8b made of metal (SUS316). A cover 9 is attached to the head 8c.

Reference numeral 10 denotes a GPS antenna provided on the lid 9 of the head 8c of the frame 8, and reference numeral 11 denotes a radio transmitting / receiving antenna.

Reference numeral 12 denotes a GPS receiving device provided in the frame, which takes position data. In addition, the G
The PS receiver 12 is connected to an interface described later. The GPS receiver 12 and the devices described below are all provided in the frame 8.

Reference numeral 13 denotes an azimuth sensor (geomagnetic sensor). By obtaining azimuth data, the installation direction of the measurement probe can be known, and a direction vector of acceleration can be obtained.
The direction sensor 13 is connected to an interface described later via a converter 14. Reference numeral 15 denotes an angular acceleration sensor (gyro) for obtaining rotational displacement data. The angular acceleration sensor 15 is connected to an interface described later via a preamplifier 16.

Reference numeral 17 denotes an X-axis acceleration sensor for obtaining horizontal X-axis displacement data. The X-axis acceleration sensor 17 is connected via a preamplifier 18 to an interface described later and a displacement extraction circuit. Reference numeral 19 denotes a Y-axis acceleration sensor for obtaining horizontal Y-axis displacement data. The Y-axis acceleration sensor 19 is connected via a preamplifier 20 to an interface described later and a displacement extraction circuit.

Numeral 21 denotes a Z-axis acceleration sensor for obtaining vertical displacement data. The Z-axis acceleration sensor 21
Is connected to an interface described later via a preamplifier 22.

Reference numeral 23 denotes a displacement extraction circuit connected to the X-axis acceleration sensor 17 via the preamplifier 18, and reference numeral 24 denotes a displacement extraction circuit connected to the Y-axis acceleration sensor 19 via the preamplifier 20.

Reference numerals 25 and 26 denote the displacement extracting circuits 23 and 24, respectively.
Are connected to each other, and the displacement extraction circuit 2
The value of the displacement by each of the devices 3 and 24 is compared with a preset activation level for activating all the devices. The comparators 25 and 26 are connected to a power controller described later.

Reference numeral 27 denotes a power controller, which is connected to a central control unit, which will be described later, and has the comparators 25 and 2 connected thereto.
The activation trigger is input based on the result of the comparison in step S6. The power controller 27 always supplies power to the devices within the dotted line, and supplies power to devices other than the dotted line when a start trigger is input. Reference numeral 28 denotes a timer controller connected to the central control device described later and connected to the power controller 27.

Reference numeral 29 denotes a battery connected to the power controller 27. 30 is an interface, 31
Is a central control unit connected to the interface. A data storage device 32 is connected to the central control device 31 and stores data measured by the sensors. Reference numeral 33 denotes a wireless transmission / reception device connected to the central control device 31. Reference numeral 34 denotes a temperature sensor for obtaining temperature data, which is connected to the interface 30 via a preamplifier 35.

As the battery 29, in this embodiment, two BR-C type lithium batteries (6V 5A) are used.
h) as one set, the first to fourth four sets are incorporated. Then, it is consumed from the first set, and is switched to the second set when the first set is discharged.

The specifications of the measurement probe in the present embodiment are as follows. Measurement items ・ X, Y, Z orthogonal triaxial acceleration Measurement range: ± 2G for each axis Measurement resolution: 2mmG (2 / 1000G) for each axis ・ Vertical angular acceleration (gyro) Measurement range: ± 90 ° ・ Azimuth (geomagnetism) Sensor) Measurement range: 0 to 360 ° Accuracy: ± 1 ° ・ Temperature (underground temperature) Measurement range: -10 to 100 ° C Measurement accuracy: ± 1 ° C ・ GPS receiver Measurement position unit: 1/1000 min Data transmission (wireless Formula) ・ Frequency: 2.484 GHz ・ Modulation method: DQPSK ・ Transmission power: 10 mW / MHz or less ・ Information speed: 1 Mb / s Power supply ・ Battery: 2 × 4 BR-C type lithium batteries ・ Operation time: about 10 2,000 hours (depends on operating environment and conditions) Dimensions • Total length: 1000 mm (excluding antenna) • Diameter: 120 mm • Weight: 20 kg

The measurement probe according to the above embodiment is installed by being directly inserted into the ground by a person. If this is difficult, a measurement probe with an adapter shown in FIG. 4 may be used.

The measuring probe 36 has the main body of the measuring probe 3 fitted in a case 37 which is an adapter. The case 37 is made of a material that is not easily damaged, and is formed in a cylindrical shape. And the tip 37a
And a stabilizing wing 39, 39 extending in the axial direction on the side surface of the head 37b. In this embodiment, the case 37 is made of reinforced plastic (FR
P), the underground insertion pin 38 is made of metal (SUS). Then, the main body of the measurement probe 3 is fitted into the case 37 with the shock absorbing gel 40 being filled on the distal end side.

A basket-like collection tool 41 which can be hooked and collected from a helicopter or the like with a hook is attached to the head of the case 37 via a wire 42.

[0051]

According to the debris flow detection system of the present invention, the occurrence of a debris flow can be detected in advance, and when a debris flow actually occurs, the occurrence, the range of occurrence, and the debris flow flow down. The direction and speed can be accurately detected.

Further, since the measurement probe can be installed simply by inserting it into the ground, and the measurement data is transmitted by a radio signal, each sensor for detecting the displacement of the ground and the observation base station as in the related art are used. There is no need to pull a cable for signal transmission or the like to be connected, so that the installation work can be easily and quickly completed.

When the map of the hillside and the position and displacement state of each measurement probe based on the measurement data of each measurement probe are displayed on the display of the personal computer so that the information can be checked at a glance. And the subsequent response can be performed quickly and without error.

Further, if an alarm device which issues an alarm by sound or character when the displacement of the measuring probe exceeds a predetermined value is provided, the occurrence of debris flow can be clearly notified.

Further, the measuring probe according to the present invention is suitable for use in the debris flow detection system according to the present invention. Further, if a measuring probe with an adapter is used, a steep part of a hillside, which is difficult for a person to approach, or a secondary part. This is effective when direct installation by humans is difficult, such as when there is a risk of disaster.
Also, if a collecting tool is attached to the adapter, it can be collected by a helicopter or the like, and the collecting work can be accelerated. Also, it can be safely recovered because it is pulled out from the sky by helicopter or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a debris flow detection system according to the present invention.

FIG. 2 is a perspective view showing a frame of the measurement probe according to the present invention, which is partially cut away.

FIG. 3 is a circuit block diagram of a measurement probe according to the present invention.

FIG. 4 is a perspective view of another embodiment of the measurement probe according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 hillside 2 GPS satellite 3,3 Measurement probe 4 Observation base station 5 Wireless transmitting / receiving antenna 6 Personal computer 7 Alarm device 8 Frame 9 Frame lid 10 GPS antenna 11 Wireless transmitting / receiving antenna 12 GPS receiving device 13 Direction sensor 15 Angular acceleration sensor 17 X axis Acceleration sensor 19 Y-axis acceleration sensor 21 Z-axis acceleration sensor 23,24 Displacement extraction circuit 25,26 Comparator 27 Power controller 28 Timer controller 29 Battery 30 Interface 31 Central controller 32 Data storage device 33 Wireless transceiver 34 Temperature sensor 36 Measurement probe 37 Case 38 Soil Insertion Pin 39, 39 Stabilizing Wing 40 Shock Absorbing Gel 41 Basket-shaped Collection Tool 42 Wire

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[Procedure amendment]

[Submission date] August 30, 1999 (1999.8.3)
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Measurement probe used for debris flow detection system

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement probe used in a debris flow detection system.

[0002]

BACKGROUND OF THE INVENTION Debris flows, once they occur, cause catastrophic disasters. For this reason, if the occurrence of debris flow is detected in advance, and once it occurs, the damage can be reduced if it can be accurately detected that the occurrence has occurred, its range, and the direction and speed at which it flows down .

[0003] For this reason, a conventional debris flow detection system is used. A debris flow detection system that sends data from each measurement probe to a remote observation base station by radio signal has also been devised.

[0004]

An object of the present invention is to provide a measuring probe which is installed at a measuring point on a hillside suitable for use in a debris flow detection system of a type which wirelessly transmits data of such a measuring probe. is there.

[0005]

SUMMARY OF THE INVENTION Accordingly, the gist of the present invention is to provide data relating to the installation position, direction, angle, etc., detected by various sensors, and the direction and speed of displacement when a predetermined value of acceleration is applied. The measurement probe to be transmitted to the observation base station, which will be described later, by a radio signal, is installed by inserting it into a plurality of measurement points on the hillside, and the reception device of the observation base station installed in a safe place apart from the measurement probe transmits the measurement probe from each measurement probe. This is a measurement probe used in a debris flow detection system that receives the transmitted radio signal and records the measurement data of each measurement probe by a recording device, and has a closed cylindrical shape with a sharp tip made of a material that is not easily damaged. A frame, a GPS antenna and a radio transmitting / receiving antenna shining on a lid of a head of the frame, and provided in the frame;
A GPS receiver, an orientation sensor, an angular acceleration sensor,
An X-axis acceleration sensor that takes horizontal X-axis displacement data, a Y-axis acceleration sensor that takes horizontal Y-axis displacement data, a Z-axis acceleration sensor that takes vertical displacement data, and the X-axis acceleration sensor and the Y-axis acceleration sensor connected to each other. A displacement extraction circuit, a comparator for comparing the value of the displacement by the displacement extraction circuit with a preset activation level for activating all devices, and a comparison result by the comparator connected to a central control device described later. A power controller that inputs a start trigger based on the timer controller connected to the central controller and a power controller connected to the power controller, a battery connected to the power controller, the GPS receiver, a direction sensor, an angular acceleration sensor, Connect each of X-axis acceleration sensor, Y-axis acceleration sensor, and Z-axis acceleration sensor A central control device connected to the interface, a data storage device connected to the central control device, and a wireless transmission / reception device connected to the central control device. In the probe.

A temperature sensor for obtaining temperature data in the measurement probe may be connected to an interface.

[0007] In this way, it is possible to clearly confirm the temperature at each of the installed measurement points on the hillside and the temperature at the current position when displaced by debris flow.

In addition, since the above-mentioned measuring probe is installed by being directly inserted into the ground at the measuring point by a person, it may be used in a steep part of a hillside where a person is hard to approach or when there is a risk of a secondary disaster. It is difficult to install this.

In such a case, a measuring probe with an adapter is used. Thus, the measuring probe is made of a material which is hard to be damaged, and is provided with an underground insertion pin at the tip and an impact tip on the tip side in a cylindrical case provided with a stable wing along the axial direction on the side of the head. The measurement probe main body is fitted with the absorption gel filled.

[0010] The measurement probe is dropped from the helicopter or the like into the air and protruded to the measurement point, and can be safely installed even in the case described above. Since the shock absorbing gel is filled at the tip end in the case, it is possible to effectively prevent the measurement probe main body fitted in the inside of the case from being damaged by a drop impact. In addition, since the case is provided with the stabilizing wing, it can be lowered in a substantially vertical state, so that the measurement probe can be pushed up substantially straight on the ground.

In the above-mentioned measuring probe, a basket-like collecting tool which can be hooked and collected from a helicopter or the like with a hook may be attached to the head of the case via a wire. This makes it possible to collect by a helicopter or the like when collecting by pulling it out from the installation point or when collecting from the site when it flows out due to debris flow, thereby facilitating the collection work.
In addition, it can be safely recovered because it is pulled out from the sky with a helicopter or the like.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a debris flow detection system.

In the figure, 1 is a hillside, and 1A, 1B, 1
C, 1D, 1E and 1F are measurement points set at substantially equal intervals as a whole in a predetermined area on the hillside.

Reference numeral 2 denotes a GPS satellite. Reference numerals 3, 3, 3,... Denote measurement probes inserted into the measurement points 1A to 1F on the hillside. The measurement probes 3, 3, 3,... Are configured in detail later, and wirelessly transmit data relating to the installation position, direction, angle, etc. detected by various sensors, and the direction and speed of displacement when a predetermined value of acceleration is applied. It is transmitted to the observation base station described later by a signal.

Reference numeral 4 denotes an observation base station installed in a safe place away from the measuring probes 3, 3, 3,... The observation base station 4 receives a radio signal transmitted from each measurement probe 3, 3,... By a receiving device (not shown), and receives each of the measurement probes 3, 3, by a recording device (not shown). 3
.. Are recorded. Reference numeral 5 denotes a wireless transmitting / receiving antenna. Further, a personal computer described later may be used as the recording device.

Although the basic configuration of the debris flow detection system is established as described above, in the example of FIG. 1, a map of the hillside 1 and the measurement of each measurement probe 3, 3, 3,. The position and displacement state of each measurement probe based on the data are displayed in an overlapping manner.

Further, in the example of FIG. 1, there is provided an alarm device 7 which issues an alarm by sound when the displacement of the measuring probes 3, 3, 3... Exceeds a predetermined value.

According to the debris flow detection system, the measurement data periodically transmitted wirelessly from each of the measurement probes 3, 3, 3,...
If there is data indicating that the probe is slightly displaced from the measurement probes 3, 3, and 3 installed on B, 1D, and 1E, it indicates that the data is on the ground in the range where the measurement probes 3, 3, and 3 are installed. Is displaced, and it is possible to recognize that debris flow may occur.

Also, the displacement of the ground increases,
For example, when acceleration of a predetermined value is applied to the measurement probes 3, 3, and 3 installed at the measurement points 1B, 1D, and 1E,
The measurement probes 3, 3, 3 wirelessly transmit data on the direction and speed of the displacement to the observation base station 4.

Thus, the fact that the debris flow has actually occurred, the range in which the debris flow has occurred, the direction and speed at which the debris flow flows can be clearly recognized.

Further, since the measurement probe can be installed simply by inserting it into the ground, and the measurement data is transmitted by a radio signal, a signal connecting each sensor for detecting the displacement of the ground to the observation base station is provided. There is no need to pull transmission cables. Therefore, the installation work can be easily and quickly completed. Further, the displacement range is not limited to the cable, and the range in which the radio wave reaches can be measured.

The specific configuration of the measurement probe according to the present invention used in the debris flow detection system is as described below. An example of the operation in the case of using the measurement probe will be described below. In the following operation, the measurement probe must use a battery as a power supply, and therefore it is necessary to minimize the power consumption in order to operate the probe for as long a time as possible. It has been done.

For 48 hours after the measurement probes 3, 3, 3,... Are installed at each measurement point, all the measurement values are transmitted to the observation base station 4 once every hour from each measurement probe. During this time, the observation base station acquires information such as the position of the measurement probe.

After a lapse of 48 hours from the installation, each of the measurement probes 3, 3, 3... Enters a sleep standby state, and in this state, only the X-axis acceleration sensor and the Y-axis acceleration sensor are turned on. .

After that, the data is periodically transmitted from the measurement probes 3 to the observation base station 4 every 48 hours.

When acceleration of 0.01 G (provisional set value) is applied to the measurement probes 3, 3, 3... In the sleep standby state, power is immediately supplied to all devices in the measurement probes. , And continuously transmits the measurement data to the observation base station 4. This will cause debris flow and
The generated area, the direction and speed at which the debris flow flows down are detected.

The measurement probes 3, 3, 3... Continue transmitting measurement data until a certain time has elapsed even after the acceleration is no longer detected. After that, the sleep standby state is set again.

When data is transmitted from the measurement probes 3 to the observation base station 4, the observation base station 4
When the answer back indicating that the transmission from the server has been received is not obtained, a beacon is transmitted together with the position data every 10 minutes. Thus, when the debris flow occurs and the measurement probe flows out, the measurement probe can be easily collected.

Next, a description will be given of a measurement probe according to the present invention suitable for use in the debris flow detection system. FIG. 2 is a perspective view of a measurement probe in which a frame is partially cut away, and FIG. 3 is a circuit block diagram of the measurement probe.

Reference numeral 3 denotes a measurement probe used in the debris flow detection system. Reference numeral 8 denotes a cylindrical frame having a sharp tip made of a material that is not easily damaged. In this embodiment, the frame 8 has a main body 8a made of reinforced plastic (FRP) and a tip 8b made of metal (SUS316). A cover 9 is attached to the head 8c.

Reference numeral 10 denotes a GPS antenna provided on the lid 9 of the head 8c of the frame 8, and reference numeral 11 denotes a radio transmitting / receiving antenna.

Reference numeral 12 denotes a GPS receiving device provided in the frame, which takes position data. In addition, the G
The PS receiver 12 is connected to an interface described later. The GPS receiver 12 and the devices described below are all provided in the frame 8.

Reference numeral 13 denotes an azimuth sensor (geomagnetic sensor). By obtaining azimuth data, the direction in which the measurement probe is installed can be known, and a direction vector of acceleration can be obtained.
The direction sensor 13 is connected to an interface described later via a converter 14. Reference numeral 15 denotes an angular acceleration sensor (gyro) for obtaining rotational displacement data. The angular acceleration sensor 15 is connected to an interface described later via a preamplifier 16.

Reference numeral 17 denotes an X-axis acceleration sensor which obtains horizontal X-axis displacement data. The X-axis acceleration sensor 17 is connected via a preamplifier 18 to an interface described later and a displacement extraction circuit. Reference numeral 19 denotes a Y-axis acceleration sensor for obtaining horizontal Y-axis displacement data. The Y-axis acceleration sensor 19 is connected via a preamplifier 20 to an interface described later and a displacement extraction circuit.

Reference numeral 21 denotes a Z-axis acceleration sensor for obtaining vertical displacement data. The Z-axis acceleration sensor 21
Is connected to an interface described later via a preamplifier 22.

Reference numeral 23 denotes a displacement extraction circuit connected to the X-axis acceleration sensor 17 via the preamplifier 18, and reference numeral 24 denotes a displacement extraction circuit connected to the Y-axis acceleration sensor 19 via the preamplifier 20.

Reference numerals 25 and 26 denote the displacement extraction circuits 23 and 24, respectively.
Are connected to each other, and the displacement extraction circuit 2
The value of the displacement by each of the devices 3 and 24 is compared with a preset activation level for activating all the devices. The comparators 25 and 26 are connected to a power controller described later.

Numeral 27 denotes a power controller which is connected to a central control unit, which will be described later, and which includes the comparators 25 and 2.
The activation trigger is input based on the result of the comparison in step S6. The power controller 27 always supplies power to the devices within the dotted line, and supplies power to devices other than the dotted line when a start trigger is input. Reference numeral 28 denotes a timer controller connected to the central control device described later and connected to the power controller 27.

Reference numeral 29 denotes a battery connected to the power controller 27. 30 is an interface, 31
Is a central control unit connected to the interface. A data storage device 32 is connected to the central control device 31 and stores data measured by the sensors. Reference numeral 33 denotes a wireless transmission / reception device connected to the central control device 31. Reference numeral 34 denotes a temperature sensor for obtaining temperature data, which is connected to the interface 30 via a preamplifier 35.

As the battery 29, in this embodiment, two BR-C type lithium batteries (6V 5A) are used.
h) as one set, the first to fourth four sets are incorporated. Then, it is consumed from the first set, and is switched to the second set when the first set is discharged.

The specifications of the measuring probe according to the present embodiment are as follows. Measurement items ・ X, Y, Z orthogonal triaxial acceleration Measurement range: ± 2G for each axis Measurement resolution: 2mmG (2 / 1000G) for each axis ・ Vertical angular acceleration (gyro) Measurement range: ± 90 ° ・ Azimuth (geomagnetism) Sensor) Measurement range: 0 to 360 ° Accuracy: ± 1 ° ・ Temperature (underground temperature) Measurement range: -10 to 100 ° C Measurement accuracy: ± 1 ° C ・ GPS receiver Measurement position unit: 1/1000 min Data transmission (wireless Formula) ・ Frequency: 2.484 GHz ・ Modulation method: DQPSK ・ Transmission power: 10 mW / MHz or less ・ Information speed: 1 Mb / s Power supply ・ Battery: 2 × 4 BR-C type lithium batteries ・ Operation time: about 10 2,000 hours (depends on operating environment and conditions) Dimensions • Total length: 1000 mm (excluding antenna) • Diameter: 120 mm • Weight: 20 kg

The measuring probe of the above embodiment is installed by being directly inserted into the ground by a person. If this is difficult, a measuring probe with an adapter shown in FIG. 4 may be used.

The measuring probe 36 has the main body of the measuring probe 3 fitted in a case 37 which is an adapter. The case 37 is made of a material that is not easily damaged, and is formed in a cylindrical shape. And the tip 37a
And a stabilizing wing 39, 39 extending in the axial direction on the side surface of the head 37b. In this embodiment, the case 37 is made of reinforced plastic (FR
P), the underground insertion pin 38 is made of metal (SUS). Then, the main body of the measurement probe 3 is fitted into the case 37 in a state where the shock absorbing gel 40 is filled on the distal end side.

A basket-like collecting tool 41 is attached to the head of the case 37 via a wire 42 so that the collecting tool 41 can be hooked and collected by a helicopter or the like with a hook.

[0045]

The measurement probe according to the present invention is suitable for use in a debris flow detection system that wirelessly transmits data from the measurement probe. Further, if a measurement probe with an adapter is used, a hillside that is difficult for humans to approach is used. This is effective when it is difficult for a person to directly install the device, for example, in a steep place or when there is a risk of a secondary disaster. Also, if a collecting tool is attached to the adapter, it can be collected by a helicopter or the like, and the collecting work can be accelerated. Also, it can be safely recovered because it is pulled out from the sky by helicopter or the like.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a debris flow detection system using a measurement probe according to the present invention.

FIG. 2 is a perspective view showing a frame of the measurement probe according to the present invention, which is partially cut away.

FIG. 3 is a circuit block diagram of a measurement probe according to the present invention.

FIG. 4 is a perspective view of another embodiment of the measurement probe according to the present invention.

[Description of Signs] 1 Hillside 2 GPS satellite 3,3 Measurement probe 4 Observation base station 5 Wireless transmitting / receiving antenna 6 Personal computer 7 Alarm device 8 Frame 9 Frame lid 10 GPS antenna 11 Wireless transmitting / receiving antenna 12 GPS receiving device 13 Direction sensor 15 angle Acceleration sensor 17 X-axis acceleration sensor 19 Y-axis acceleration sensor 21 Z-axis acceleration sensor 23, 24 Displacement extraction circuit 25, 26 Comparator 27 Power controller 28 Timer controller 29 Battery 30 Interface 31 Central control device 32 Data storage device 33 Wireless transmission / reception device 34 Temperature sensor 36 Measuring probe 37 Case 38 Soil insertion pin 39,39 Stabilizing wing 40 Shock absorbing gel 41 Basket-shaped recovery tool 42 Wire

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasumasa Itakura 2-5-1, Hiratsu, Otsu City, Shiga Prefecture Inside the Technical Department, Faculty of Education, Shiga University (72) Inventor Gohei Endo 2-7-1, Morinosato, Atsugi City, Kanagawa Prefecture 101 (72) Inventor Toshiaki Kitajima 547-309 Futsubashi, Futsubashi, Seya-ku, Yokohama, Kanagawa F-term (reference) 2D044 EA07 2F073 AA40 AB04 BB01 BC02 CC03 DD02 FG02 2F076 BA12 BA18 BB09 BD02 BD04 BE13 BE18 5J062 AA01 AA11 BB08 CC07H05

Claims (7)

[Claims] An installation position detected by various sensors,
Direction, angle, and the like, a measurement probe for sending data on the direction and speed of displacement to a later-described observation base station by a radio signal when acceleration of a predetermined value is added, and inserted and installed at a plurality of measurement points on the hillside, The receiving device of the observation base station installed in a safe place away from each measuring probe receives the radio signal transmitted from each measuring probe, and records the measurement data of each measuring probe by the recording device. Features a debris flow detection system. 2. The debris flow detection according to claim 1, wherein a map of the hillside and a position and a displacement state of each measurement probe based on measurement data of each measurement probe are displayed on a display of a personal computer in an overlapping manner. system. 3. The debris flow detection system according to claim 1, further comprising an alarm device that issues an alarm by sound or character when the displacement of the measurement probe exceeds a predetermined value. 4. A frame having a closed cylindrical shape with a sharp tip made of a material that is hardly damaged, a GPS antenna and a radio transmitting / receiving antenna provided on a lid on a head of the frame, and a GPS receiving device provided in the frame. An azimuth sensor, an angular acceleration sensor, an X-axis acceleration sensor that takes horizontal X-axis displacement data, a Y-axis acceleration sensor that takes horizontal Y-axis displacement data,
A Z-axis acceleration sensor that takes vertical displacement data; a displacement extraction circuit connected to each of the X-axis acceleration sensor and the Y-axis acceleration sensor; a value of displacement by the displacement extraction circuit; A comparator for comparing the set activation level with the set power level, a power controller connected to the central control device described later and inputting a start trigger based on the comparison result by the comparator, and a power controller connected to the central control device described later and connected to the power controller A timer controller, a battery connected to the power controller, an interface connecting the GPS receiver, an azimuth sensor, an angular acceleration sensor, an X-axis acceleration sensor, a Y-axis acceleration sensor, and a Z-axis acceleration sensor, and the interface A central control device connected to the Measuring probe, wherein a data storage device connected, to become a wireless transmission device and connected to the central control device. 5. The measurement probe according to claim 4, wherein a temperature sensor for obtaining temperature data is connected to the interface. 6. A shock-absorbing gel is filled on the tip side in a cylindrical case made of a material that is not easily damaged, provided with a soil insertion pin at the tip and a stable wing along the axial direction on the side of the head. The measurement probe according to claim 4, wherein the measurement probe main body is fitted in a state where the measurement probe is inserted. 7. The measuring probe according to claim 6, wherein a basket-like collecting tool which can be hooked and collected from a helicopter or the like by a hook is attached to a head of the case via a wire.