JP4299355B2 - Information transmission pile - Google Patents

Description

  The present invention is an information transmission pile that transmits detection information of a sensor housed in a pile embedded in the ground together with tag information, and information for early detection of ground fluctuation such as occurrence of landslide, occurrence of debris flow, occurrence of landslide, etc. The present invention relates to a technique for detecting ground fluctuation using a transmission pile.

As a pile that can transmit information, for example, a pile that transmits position information of the pile itself is known (see Patent Document 1). Since this position information transmission pile is provided with a GPS antenna, the position information of this pile can be grasped at the management center, for example. Therefore, since the position of the pile moves when a landslide or earthquake occurs, the landslide or earthquake can be monitored quickly.
JP-A-11-83487

  Here, of ground changes such as the occurrence of landslides, debris flows, and landslides, debris flows due to abnormal flooding that cause particularly large disasters are a large amount of sediment containing water due to heavy rain during the rainy season or typhoon. Is a phenomenon that flows down the valley in an instant. In general, debris flow may occur during heavy rains of 20 mm or more per hour or heavy rains of 100 mm or more after it starts to fall, and is considered to be cautionary. The speed of the generated debris flow is generally 5 to 20 m / s and 20 to 70 km / h, and it is said that this speed leads to a major disaster.

In order to reduce disasters caused by ground changes such as debris flow, it is necessary to grasp the occurrence and scale of debris flow at an early stage, and various debris flow detection devices have been proposed. Conventional debris flow detection devices are roughly classified into contact types and non-contact types.
In the contact type, the wire is stretched horizontally in the cross section of the flow path, and when a debris flow occurs, the wire breaks and is detected, and the water level of the debris flow is determined by stretching multiple wires in the vertical direction. It can be measured roughly (see, for example, Patent Document 2). However, this contact type uses a wire, and once it is disconnected, it cannot be detected again unless it is replaced, so that it cannot be used continuously.
On the other hand, as a non-contact type, an optical sensor that uses light instead of the above wire, an acoustic sensor that detects the sound generated by debris flow with a microphone, a vibration sensor that captures seismic motion generated during debris flow, or super Some use an ultrasonic water level meter that generates a sound wave and receives the reflected wave and measures the water level from the round-trip time (see, for example, Patent Document 3). However, although the non-contact type can be used continuously, malfunctions are liable to occur due to weather conditions and the like, and there is a problem in reliability, and there are difficulties in maintenance and the like, and there is a problem in cost.
JP 2002-352356 A Japanese Patent Laid-Open No. 11-83487

  As an example of how to use such a non-sensor, an active IC tag equipped with a sensor such as a magnetic sensor or an acceleration sensor is known. Since the active IC tag can transmit the sensor detection information by combining the sensor and the active IC tag, the sensor detection information is managed by a processing device such as a management center, and a wide range of measurement and monitoring is possible.

Here, an appropriate mounting location must be secured for the active IC tag on which the sensor is mounted. In particular, when performing a wide range of detections, it is necessary to install a large number of sensors, which are exposed to wind and rain, and once deployed, are exposed to the potential for attacks for many years. is necessary.

  Then, an object of this invention is to provide the information transmission pile which can ensure favorable installation for a sensor. In addition, a technology that detects ground deformation such as landslides, debris flows, and landslides can be used continuously, has few malfunctions, and is excellent in maintenance and economy. It aims at providing using the information dispatch pile provided with the sensor.

In order to achieve the above-mentioned object, the first configuration of the information transmission pile according to the present invention includes an active IC tag and an integral or separate sensor provided therein, part or all of which are embedded in the ground. active IC tag, the detection information of the sensor along with the tag information, transmits to the management server that manages the detection information.

  According to this configuration, since the IC tag and the sensor are provided on the pile, a good installation for the sensor is ensured. Moreover, since the detection information of the sensor is transmitted together with the tag information, the processing apparatus that processes these information can manage the detection information in combination with the tag information. Furthermore, since the information transmission pile can be installed as long as there is ground that can embed the pile, it is easy to place the sensor in a predetermined area, and by properly arranging multiple information transmission piles, detection information Can be obtained.

Here, the “IC tag” records tag information and can transmit the tag information to the outside wirelessly. The IC tag is preferably an active type. Note that the “active IC tag” described in the present specification means an active type, that is, an IC tag that transmits a radio wave by providing a battery. On the other hand, a “passive IC tag” means a passive type, that is, one that receives radio waves from, for example, a reader and operates using the power supplied in this way.
“Sensors” preferably include temperature sensors, impact sensors and gas sensors.
The “detection information” is preferably a sensor measurement value, but may be data obtained by processing the measurement value.
The “tag information” is preferably management information related to the installation position information of the pile storing the IC tag and the installation location of the pile. However, the tag information may be an identifier of an active IC tag. In this case, installation position information and management information are stored in a database or the like in association with this identifier.

In a preferred embodiment of the present invention, the active IC tag is an IC tag with a sensor, and a recording unit in which IC tag identification information for identifying the other IC tag is recorded; A communication unit that performs transmission, and a control unit that performs information transmission via the communication unit based on measurement information of the sensor. The information transmission through the communication unit performed under the control of the control unit is information transmission according to the measurement value of the vibration detection sensor (for example, identification information unique to each wireless IC tag, IC tag identification information for identifying the wireless IC tag).
Moreover, you may provide the pile main body which has the accommodating part which accommodates the said IC tag, and the cap which covers the head of this pile main body and obstruct | occludes the said accommodating part. According to this configuration, since the IC tag is stored in the storage unit and the cap closes the storage unit, it is possible to prevent the IC tag from being exposed to wind and rain and being damaged. Furthermore, since the cap is put on the head of the pile main body, it is easy to maintain the IC tag in the storage portion of the pile main body by removing the cap. In other words, during operation, damage to the IC tag stored can be prevented by closing the storage unit, and the closed storage unit can be opened by removing the cap except during operation.

In a preferred embodiment of the present invention, the pile body is rod-shaped, the sensor is a temperature / humidity sensor, and the temperature / humidity sensor detects one or both of temperature and humidity of a part of the rod-shaped pile body. It has a 1st sensing part.
Here, the “temperature / humidity sensor” includes a temperature sensor, a humidity sensor, and a sensor having both functions.

In a further preferred embodiment of the present invention, the portion is an upper end portion or a lower end portion of the pile body, and the temperature / humidity sensor is further located on a side opposite to the portion detected by the first sensing unit, It has the 2nd sensing part which detects either one or both of temperature and humidity of the lower end part or upper end part of the pile main part.
According to this structure, since a pile main body is rod-shaped, if it installs with the vertical direction as a longitudinal direction, a sensing part will be arrange | positioned at the upper end part and a lower end part, and the temperature of a different height can be detected. Therefore, if only a part of the pile is buried, it is possible to detect the temperature of two places in the atmosphere and the ground, which is suitable for investigating the road freezing condition. The number of sensing units is not limited as long as it is two or more. For example, a third sensing unit may be arranged between the upper end portion and the lower end portion of the pile to form three sensing units.

  In a further preferred embodiment of the present invention, the information transmission pile is a distance marker embedded on the side of a road, and the tag information includes the installation position information of the information transmission pile and the road where the information transmission pile is embedded. One or both of the management information. According to this structure, since an information dispatch pile is a distance marker, it is installed in the predetermined location of the road. Therefore, since the atmospheric temperature and the underground temperature at each of the predetermined locations on the road in which these distance markers are embedded can be detected, such a sensor arrangement is extremely suitable for acquiring the frozen state of the road. The tag information includes one or both of installation position information and road management information. Since this tag information is transmitted together with the detection information of the sensor, information related to the place where the detection information is obtained or the road Etc. are easy to understand. In addition, when the third sensing part is further arranged between the upper end and the lower end of the pile and about half of the pile is embedded in the ground, the temperature in the vicinity of the road surface is detected in addition to the atmospheric and underground temperatures. Can be able to.

  In another preferred embodiment of the present invention, the sensor is an impact sensor, and is embedded in the ground where position fluctuation may occur. Here, the “impact sensor” is a sensor that can detect vibration and impact, and includes a vibration sensor, an acceleration sensor, and a displacement sensor. “Position fluctuation” means that the ground moves, and particularly includes landslides, landslides, rockfalls, and the like that occur on slopes, and also includes debris flows in rivers. According to this configuration, since the information transmission pile on which the impact sensor is mounted is embedded in the ground, a change appears in the detection information of the impact sensor when a position change occurs. Thus, it is possible to detect the occurrence of landslides or landslides. In addition, since the pile can be easily embedded even on a slope where landslide is likely to occur, the mounting location of the sensor can be easily secured. Furthermore, compared to the contact type described above where a wire is stretched around a wide area, it is only necessary to bury the pile only in a place where position fluctuation is likely to occur, so there is no need to install many piles side by side, You only need to install it where necessary.

Before Symbol IC tag may also be waterproof. Here, “waterproofing” includes packaging with a waterproof bag, coating with a waterproof film made of a Teflon (registered trademark) sheet or gel sheet, and rubber coating by chemical reaction treatment. According to this configuration, since the IC tag is waterproofed, it is possible to prevent the IC tag from being damaged by liquid or the like. In particular, since the active IC tag contains a battery, when the active IC tag is housed in the pile body, it is necessary to remove the protective cap that covers the pile body in order to replace the battery. Is done. Therefore, since it is normal that the pile main body and the protective cap are not firmly bonded, there is a risk that liquid or the like may be mixed between the cap and the pile main body. Can be prevented. Furthermore, the surface of the IC tag is subject to dew condensation due to temperature changes, that is, temperature differences such as morning and evening, but the waterproof membrane is coated with a breathable material such as a Teflon (registered trademark) sheet or gel sheet. By using it, it is possible to prevent condensation on the surface of the IC tag.

Shock absorbing material may be interposed between the pile body and the inner surface of the front Symbol cap. According to this configuration, since the shock-absorbing material can absorb the impact when the pile is driven into the ground, the IC tag accommodated in the pile can be made difficult to receive the impact. Further, the shock absorbing material can be easily fitted and fixed inside the cap.

Further notification means is provided in front Symbol IC tag, the detection information of the sensor detects a displacement exceeding a predetermined threshold, the notification means may output an alarm. According to this configuration, since the notification means outputs an alarm in response to the detection of the sensor, when the animal contacts the information transmission pile equipped with the sensor and gives an impact, it can be repulsed by the notification means. .

One or both may be formed in the phosphorescent material of the pile body and before Symbol cap. According to this structure, a cap and / or a pile main body can shine at night, and can make a pile stand out and can be visually recognized. Therefore, by appropriately arranging the piles, the piles can be made to function as an evacuation route for guiding a person.

In a preferred embodiment of the present invention, the pile is rod-shaped, has an axial center along the longitudinal direction, a plurality of divided bodies are connected in the axial direction, and the sensor is the plurality of divided bodies. When one of the adjacent divided bodies receives a predetermined external force in a direction orthogonal to the axis, the one divided body is separated from the other divided body. The detection information of the impact sensor is transmitted together with the corresponding tag information. According to this configuration, when one of the adjacent divided bodies receives a predetermined external force in a direction orthogonal to the axis, the one divided body is set to be separated from the other divided body, If a pile receives external force from a horizontal direction, a pile will be broken in one connection part of a division body. When the pile is broken in this way, a part of the pile moves and the other part remains in the position as it is, so the impact sensor provided in the one or more moved divided bodies detects the position change, The impact sensor provided in one or more divided bodies that do not move does not detect position fluctuation. From this, the location where the divided bodies are separated from the detection information of all the impact sensors can be specified, and the vertical range of the external force received by the pile can be estimated. In other words, because the landslide is a landslide that falls down on the surface layer, when the pile is broken, a surface layer collapse like a landslide has occurred above the place where the pile was broken, and the ground below does not change Is estimated. Therefore, it is useful for estimating the scale of surface collapse, that is, the scale of landslides.

The detection system according to the present invention includes at least one information transmission pile installed at a predetermined observation point, further includes the management server, and the management server is transmitted from the information transmission pile. Acquire and manage information including

When the detection sensor is a vibration detection sensor, by transmitting information based on measurement information of the vibration detection sensor, for example, by transmitting information according to the measurement value of the vibration detection sensor, vibrations and disasters that normally occur previously dividing a vibration due, it is possible to improve the detection accuracy of detection known systems.
For example, information related to settings for distinguishing between vibrations that normally occur and vibrations caused by disasters is recorded in the determination information recording means of the management server described later, and depending on the location where the information transmission pile is installed, the information is It is transmitted from the management server to the wireless IC tag of each information transmission pile. The wireless IC tag provided in each information transmission pile refers to the information that distinguishes the normally generated vibration and the vibration caused by a disaster stored in the storage unit of the wireless IC tag, and the vibration detection sensor by information transmitted in response to the measured value, so as to only the information sent in the case of the vibration caused by a disaster, it is possible to improve the detection accuracy of detection known systems.

  In this way, a wireless IC tag with a vibration detection sensor is installed on the information transmission pile that is partly buried in the soil, so when there is ground fluctuation such as debris flow, the vibration detection sensor senses and the wireless IC tag Identification information unique to the wireless IC tag (that is, IC tag identification information for identifying the wireless IC tag) is transmitted. Therefore, it is not necessary to replace by disconnection as in the conventional contact type, and continuous use is possible. Moreover, since a part of a pile main body is embed | buried in soil, unlike the conventional non-contact type | mold, it can aim at prevention of a malfunctioning without being influenced by weather conditions.

  The wireless IC tag with a vibration detection sensor is attached to the inside of the lid body that can be attached to and detached from the head of the pile body (for example, the inner side wall surface of the lid body, Or, it is installed on the head of the pile body covered with a lid, etc., so that it can be used under harsh natural conditions, and maintenance is easy. Further, since the lid is detachably attached to the head of the pile main body, the battery can be replaced even if the wireless IC tag is an active type using a battery.

The ground deformation detection system according to the present invention includes at least one information transmission pile installed at a predetermined observation point, and further includes the management server.

  In the ground fluctuation detection system of the present invention, the management server discriminates from the measured value information recording means for recording the acquired information as a measured value, and the other information transmitting piles respectively attached to the information transmitting piles. Pile information recording means for associating and recording the identification information of each and the position information of the information transmission pile, determination information recording means for recording determination standard information of ground fluctuation, and determination means for determining ground fluctuation ing.

  The determination means is recorded in the measurement value recorded in the measurement value information recording means, the identification information and position information of the information transmission pile recorded in the pile information recording means, and the determination information recording means. It is characterized in that the ground fluctuation is determined based on the determination criterion information.

According to ground deformation detection system according the present invention, at least one or more said information originating pile to a predetermined observation point (e.g., multiple) by previously installed, the measurement value of the vibration detecting sensor is a predetermined value Information that identifies the information transmission pile from the information transmission piles that have passed (that is, identification information unique to the wireless IC tag attached to the information transmission pile, and an IC for identification from other wireless IC tags) Tag management information) is acquired by the management server.

  In the pile information recording means of the management server, identification information for distinguishing from other information transmission piles assigned to the information transmission piles and position information of the information transmission piles are recorded in association with each other. . Here, for example, the identification information for distinguishing from other information transmission piles assigned to the information transmission piles is identification information unique to the wireless IC tag installed in each information transmission pile (that is, IC tag identification information for distinguishing from other wireless IC tags).

  Therefore, the determination means includes the measurement value recorded in the measurement value information recording means (for example, the IC tag identification information acquired by the management server) and the information transmission pile recorded in the pile information recording means. Identification information (for example, the IC tag identification of the wireless IC tag installed in the information transmission pile, which is identification information for identifying the information transmission pile assigned to the information transmission pile) Information) and position information are used to identify an information transmission pile whose measured value of the vibration sensor exceeds a predetermined value and its installation position.

  Thereby, for example, a plurality of information transmission piles of the present invention are installed so as to cross an expected flow of debris flow at a place where a debris flow may occur, and from information transmission piles installed adjacent to each other If the above-mentioned IC tag identification information is acquired, it is possible to determine the debris flow occurrence location, its scale, and the like based on the spread in the width direction in which they are installed.

  In the ground fluctuation detection system of the present invention described above, acquisition by the management server of information transmitted from the information transmission pile is received by the reading device that receives information transmitted from the information transmission pile, and the reading device. The communication apparatus that transmits the information to the wireless communication network and the form that is performed via the wireless communication network can be employed.

  For example, the wireless IC tag is information (for example, identification information unique to the wireless IC tag) when one or more information transmission piles of the present invention described above are installed at a predetermined observation point and the vibration detection sensor detects vibration. , Identification information for identification with other wireless IC tags) is transmitted, and this is received by a reader (for example, an IC tag reader), and the communication device transmits it to the wireless communication network. The management server acquires the information via the wireless communication network, and the management server determines the ground fluctuation based on the various information recorded in the recording means and the transmitted information.

That is, in the present invention, since information transmission is performed wirelessly, the wire breakage does not occur unlike the conventional contact type detection device, and it can be used continuously. And since the said information transmission pile is used, the detection of the ground fluctuation | variation which suppressed the malfunctioning is attained, and a detection system with easy maintenance can be provided.

  In addition, acquisition by the management server of the information transmitted from the information transmission pile is received from the relay apparatus and at least one relay apparatus that receives and relays information transmitted from the information transmission pile. The communication apparatus that transmits the information to a wireless communication network and a form that is performed via the wireless communication network may be employed.

  That is, instead of the reading device that receives information transmitted from the information transmission pile, a relay device that relays information transmitted from the information transmission pile is placed between the communication device and the information transmission pile. This is in consideration of an environment at an observation point where it is difficult to install an IC tag reader as a reading device, or a case where the readable range of the IC tag reader is narrow.

  In the ground deformation detection system of the present invention described above, the management server further includes terrain geology information recording means for recording terrain geology information of the observation point where the information transmission pile is installed, and the determination means includes In the determination of ground fluctuation, correction based on the topographical geological information can be performed.

  By recording the topographical and geological information of the observation point where the information transmission pile is installed in advance and using it for correction of the determination of ground deformation, it becomes possible to determine the ground deformation that better matches the site situation. For example, if you record topographical geological information such as a constantly falling rockfall zone or a steep caution point where debris flow is likely to occur in a weak ground zone, the vibration detection sensor can detect vibration. It is possible to make a determination by further utilizing the transmitted identification information of the IC tag.

  The system for detecting reverse running on an expressway of the present invention comprises two or more information transmission piles according to the present invention, each of which is an impact sensor, and these two or more information transmission piles are road surfaces of the expressway. Are embedded at intervals along the traveling direction, and reverse running on a highway is detected based on detection information of the sensor. According to this configuration, two or more information transmission piles embedded along the traveling direction on the road surface of the expressway detect the impact of the automobile traveling on the road surface with a time difference (shifted in time). Therefore, when the order in which the impact is detected is reverse to the normal order, it can be detected that the automobile is traveling backward on the road surface. Therefore, the reverse running of the highway can be detected with a simple configuration in which the information transmission pile according to the present invention is buried.

  According to the information transmission pile of the present invention, good installation for the sensor is ensured, and the detection information of the sensor can be managed in combination with the tag information. Furthermore, an area distribution of detection information of the sensor can be obtained. In addition, according to the ground deformation detection system of the present invention, it is possible to detect ground deformation such as landslide, debris flow, landslide, etc., and it can be used continuously and has few malfunctions. And it is economical.

Embodiments of the present invention will be described with reference to the drawings.
The information transmission pile concerning 1st Embodiment of this invention is shown in FIGS. 1-3. This information transmission pile is an installation position information indicator that displays installation position information (for example, the position of the land, road, etc. (position by longitude, latitude, and altitude), or various information about the site, etc.) related to the installation position. is there.

  The information transmission pile 1 according to the present embodiment shown in FIG. 1 is a pile that is driven almost vertically into the ground, and has a pile body 10, and the head 12 is covered with a protective cap 20. Thus, since the head of the information transmission pile 1 is covered with the protective cap 20, the internal components are effectively protected from rain, wind, etc., and high environmental resistance is ensured. The pile body 10 and the cap 20 are made of plastic, for example. However, the pile body 10 and the cap 20 may be made of metal or the like as long as the communication function is not hindered by exposing an antenna described later to the outside.

  As shown in FIG. 2, the rod-shaped pile body 10 of the information transmission pile 1 has a storage space (storage portion) 14 whose upper side is opened along the central axis C thereof. The storage space 14 is composed of an upper recess 14a having a circular cross section located on the upper side, and a lower recess 14b positioned substantially on the lower side and extending in the axial direction. The storage space 14 forms a storage portion for storing the active IC tag 40, which will be described later.

The protective cap 20 has a square cylindrical side wall 22 and a square flat plate-like top wall 24. The side wall 22 is fitted into a step portion provided on the outer surface of the pile body 10. The top wall 24 forms a space between the side wall 22 of the cap 20 and the head 12 of the pile body 10. In addition, a sign indicating a survey point may be provided on the top surface of the top wall 24 of the protective cap 20. Note that the lower portion of the protective cap 20 may be formed of a cylindrical body having a threaded portion on the inner surface and screwed into a threaded portion provided on the outer periphery of the head 12 of the pile body 10.

  Between the pile main body 10 and the protective cap 20, a cushion material (impact buffer material) 30 made of a synthetic resin elastic body or rubber is interposed. The cushion material 30 includes a base portion 30 a that is fitted inside the protective cap, and a columnar protruding portion 30 b that is positioned in the upper recess 14 a of the storage portion 14. The cushion material 30 is an elastic body, and in a natural state where no force is applied, the dimension of the planar shape of the base portion 30a of the cushion material 30 is slightly larger than the dimension of the planar shape inside the protective cap 20. Therefore, the base 30 a of the cushion material 30 is pressed against the inner surface of the side wall 22 of the cap 20 in the fitted state. Further, the protrusion 30b of the cushion material 30 is in a fitted state where the lower surface is in contact with the upper surface of the IC tag 40 accommodated in the accommodating portion 14, or is separated by only a slight gap. Thus, since the cushion material 30 is interposed in the space between the pile body 10 and the protective cap 20 and the pile 1 is driven into the ground, the upper surface of the top wall 24 of the protective cap 20 is hit with a hammer or the like. Even so, the shock is absorbed by the cushion material 30. In particular, since the vertical vibration of the active IC tag 40 stored in the storage unit 14 is suppressed by the protrusion 30b of the cushion material, the active IC tag 40 is damaged by an impact when the pile 1 is driven into the ground. Can be prevented.

  Further, as shown in FIG. 4, a groove 34 is provided on the upper surface of the cushion material 30 to engage with an engaging protrusion (not shown) provided on the lower surface of the top wall 24 of the protective cap 20 (FIG. 2). The cushion material 30 may be positioned with respect to the cap 20 by combining them.

  An active IC tag 40 is stored in the storage portion 14 of the pile body 10 of FIG. In the present embodiment, the IC tag 40 is described as an active type, but may be a passive type. The active IC tag 40 has a rectangular flat plate shape, and includes a power supply device 46 in addition to a wireless IC tag including an IC chip 42 and a communication antenna 44 therein. Here, as shown in FIG. 3, the transverse sectional shape of the lower recess 14b of the storage space 14 has the same longitudinal dimension as the diameter of the upper recess 14a, and the dimension perpendicular to the longitudinal direction. The diameter is as small as a fraction of the diameter. Further, the opening 14bb of the lower recess 14b of the storage space 14 is configured to be slightly larger than the upper surface 41 in a state where the IC tag 40 is stored, so that the IC tag 40 can be stored. . However, as shown in FIG. 2, since the depth of the lower recess 14b is configured to be shorter than the axial length LL of the stored IC tag 40, the IC tag 40 is entirely in the lower recess 14b. A part thereof does not fit and protrudes into the upper recess 14a. In this way, the IC tag 40 is stable because it is partially housed in the lower recess 14b having the same cross-section, and part of the IC tag 40 protrudes into the upper recess 14a, making it easy to take out. Yes. In addition, since the active IC tag is stored in the storage portion 14 including the storage space as described above, there is an advantage that it can be installed at an arbitrary place as well as high environmental resistance. That is, when it is attached to a building or the like, the installation location is limited, but in the case of a pile, it is only necessary to have a ground that can be driven in, and the installation location is easily secured. Therefore, by storing the active IC tag in the stake in this way, it is possible to ensure a favorable installation for the IC tag. In addition, since the piles only need to be driven into the ground, the installation method is extremely simple, and anyone can easily install them without having to explain how to install them. Therefore, even when a new place where detection by the sensor is desired occurs, it is only necessary to drive a pile into the place, so that there is an advantage that it is easy to use at the site.

The power supply device 46 built in the active IC tag 40 is a battery, a dry cell, or a capacitor, and its duration is, for example, 5 years, depending on the method of transmitting radio waves of the active IC tag 40. In this information transmission pile 1, not only this power supply device but also a solar panel may be provided on the protective cap 20. In this case, the power consumption of the power supply device can be suppressed, and maintenance work for replacing the power supply device can be reduced.

  In the first embodiment, a sensor 48 including an acceleration sensor (impact sensor) 48 </ b> A is provided inside the active IC tag 40. That is, the active IC tag 40 and the acceleration sensor 48A are integrally formed. Thereby, the vibration, the impact, etc. which arose in the pile 1 are detectable. The acceleration sensor 48A is preferably a triaxial acceleration sensor.

  The active IC tag 40 stores tag installation information such as information including information on latitude, longitude, and elevation. Since this installation position information is also transmitted together with the detection information of the acceleration sensor, a processing device such as a management center that receives and processes these information can accurately specify the position of the pile where the predetermined displacement has occurred. . Instead of the pile installation position information, the tag information may be a pile identification number. In this case, the installation position information corresponding to the identification number is stored in the management center or another database, and the processing device obtains the installation position information from the database using the identification information transmitted from the active IC tag 40 as a key. To do.

  The IC tag 40 may further store a battery use start date as tag information, and may transmit the battery use start date together with the detection information. The processing device that has received this information can compare the battery use date and the life from the battery use start date to determine whether it is time to replace the battery. In addition, the battery voltage may be periodically detected and the IC tag 40 may transmit this voltage as tag information. The processing apparatus that has received this information can compare the detected voltage with a predetermined voltage to determine whether or not the voltage is smaller than the predetermined voltage value.

  Next, a second embodiment of the present invention will be described. FIG. 5A shows a rubber adapter 70 as an example of an IC tag storage means. In FIG. 5, an adapter 70 is a rectangular tube and is cut out from an elongated rubber rectangular tube, and an appropriate length of the adapter 70 is cut out. As shown in FIG. The both end surfaces 74 a and 74 a of the adapter 70 are attached to the inner side surface of the cap 20. The shape of the adapter 70 is an arbitrary shape that matches the inner shape of the cap. The axial length L of the adapter 70 is set to be slightly larger than the dimension between the pair of inner surfaces facing each other of the cap 20 in a free state. By fitting the adapter 70 between the inner side surfaces of the cap 20 while compressing the adapter 70 in the longitudinal direction, the adapter 70 is pressed against and locked to both inner side surfaces. Thus, the active IC tag 40 is stored in the space formed between the pile body 10 and the cap 20. Therefore, since the adapter 70 is fixed, the IC tag accommodated in the hollow portion 72 can be stably held even if it is not particularly bonded. Further, since the adapter 70 is manufactured simply by cutting a long object in accordance with the inner dimension of the cap, the adapter 70 is easy to manufacture.

  In addition, although the clearance gaps S1 and S1 are provided between the adapter 70, the top wall 24 of the cap 20, and the pile main body 10, either or both clearance gaps S1 and S1 may be eliminated. When both gaps S1 and S1 are eliminated, the adapter 70 also exhibits a cushioning action similar to that of the cushioning material 30 of FIG. When the gap between the adapter 70 and the top wall 24 is eliminated, a groove 34 similar to that shown in FIG. 4 is provided on the upper surface of the adapter 70, and the engagement protrusion provided on the lower surface of the top wall of the cap 20 is engaged. The adapter 70 can also be positioned. Further, instead of the active IC tag, an IC tag including a micro IC radio IC chip may be accommodated in the hollow portion 72 of the adapter 70.

In the third embodiment of the present invention, instead of the adapter 70 of FIG. 5, a plastic IC tag storage case is fitted inside the protective cap 20. As shown to Fig.6 (a), the protrusion part 26 is each provided in the four inner surface of the side wall 22 of the protective cap 20 of the pile 1 in this case. On the other hand, as shown in FIG. 6B, the storage case 70 has a storage portion 76 and four notches 78. The storage unit 76 stores an active IC tag. The active IC tag 40 is stored therein, and the storage case 70 is fitted into the protective cap 20. At this time, the four notches 78 of the storage case are respectively engaged with the four protrusions 26 of the protective cap 20. In this state, as shown in FIG. 6 (c), the pile body 10 is covered with a cap 20. In this way, the active IC tag 40 can be easily fixed to the pile 1 by storing the active IC tag in the storage case 70 fitted into the cap 20. When no battery is built in the IC tag 40, only the battery 46 may be stored in the storage portion 14 of the pile body 10 as indicated by a two-dot chain line. Also in this embodiment, the storage case 70 may store an IC tag including a micro IC wireless IC chip instead of the active IC tag 40.

  When the IC tag is stored in the protective cap 20 as described above, when the information transmission pile 1 is installed, the pile body 10 is first driven into the ground by, for example, a hammer, and then the IC tag is stored. A protective cap 20 is fitted into the head 12 of the pile body 10. As a result, the IC tag does not receive an impact when driven into the ground. Further, since the IC tag 40 is stored in the storage case 70 fitted in the protective cap 20, when checking or replacing the IC tag during operation, it is not necessary to remove the pile body 1a from the ground. It is only necessary to remove the protective cap 20.

  In the fourth embodiment of FIG. 7, the active IC tag 40 is packaged in a rubber waterproof bag 90 and stored in the storage unit 14 of the pile body 10. When the active IC tag 40 is stored in the storage space 14, the waterproof bag has a receiving port closed with a double-sided tape. Alternatively, it may be closed by an openable / closable sealing chuck. In this embodiment, the IC tag 40 accommodated in the pile 1 is an active type, and for example, battery replacement is required every about five years. For this reason, it is necessary to remove the protective cap 20 even during operation. Therefore, a gap is generated between the pile body 10 and the cap 20 as separate bodies, and from this gap, contaminants such as liquid and sand flow into the hollow portion 14 of the pile 1 and are stored therein. Although the tag 40 may be damaged, if the active IC tag 40 is stored in a waterproof bag, the active IC tag 40 can be protected from these contaminants. Moreover, it is not limited to what mounts a sensor like this embodiment.

  In addition to the waterproof processing using such a waterproof bag, the active IC tag 40 may be coated with a waterproof film such as a Teflon (registered trademark) sheet or a gel sheet to be in close contact. In this way, by coating the outer side of the IC tag 40 with a breathable material, it is possible to prevent condensation around the IC tag 40. Further, for example, a silicone resin adhesive may be applied to perform rubber coating.

Next, application examples of the information transmission pile 1 according to the first to fourth embodiments will be described.
The active IC tag 40 accommodated in the information transmission pile 1 according to the present embodiment is equipped with an acceleration sensor, and as shown in FIG. 8, the information transmission pile 1 may cause landslides, falling rocks, that is, slope fluctuation. It is installed on the slope or below the slope. In particular, the information transmission pile 1 is installed without excess or deficiency in places where stones and earth and sand are expected to fall, for example. Thus, since the pile 1 should just be installed only in the place considered necessary, a countermeasure is simpler than providing a fence in preparation for landslide and falling rocks. In addition, since the acceleration sensor is housed in a pile fixed by being driven into the ground, there is a very low possibility of false detection in normal times when no landslides or falling rocks occur.

The receiver (reader) 45 of the active IC tag is attached to a vehicle such as the automobile A. Accordingly, when the vehicle A travels on the road R1 and the information transmission pile 1 appears within a predetermined distance from the receiver 45, the receiver transmits information transmitted from the active IC tag, that is, detection information of the acceleration sensor. And receiving tag information.

  For example, a gateway device 52 is provided on the road R1, and an information outlet 54, an optical fiber network 56, a processing device 62 of the management center 60, and a database 64 are connected to the gateway device 52. The gateway device 52 converts data received wirelessly from the receiver 45 into data for an optical fiber network. The information outlet 54 is connected to the gateway device 52 in a wired manner and is a connection port with an optical fiber network 56 laid on the road R1. The optical fiber network 56 connects the processing device 62 of the management center 60 and the like, and the processing device 62 is provided with a database 64 for data storage.

  With this configuration, the information transmitted from each information transmission pile 1 is input to the processing device 62 of the management center, and the processing device 62 of the management center 60 detects the acceleration sensor detection information in all the piles 1, that is, the piles 1 vibrate. Monitor observation data such as the detection of impact and its magnitude. Specifically, when the sediment or stone hits the pile, a displacement appears in the detection information of the acceleration sensor, so when the displacement exceeds a predetermined threshold, an abnormal situation such as a landslide or falling rocks occurs. It is determined that it occurred. In addition, a range where landslides have occurred depending on when the detection information of a single acceleration sensor is displaced or when the detection information of multiple acceleration sensors within a certain range is displaced Is identified. In this way, the processing device 62 can specify the size and range of the landslide, so that measures can be taken based on this processing information. Thus, by monitoring in the management center 60, it is possible to detect the occurrence of an abnormality such as a landslide in the initial stage.

  In addition, instead of an acceleration sensor, an information transmission pile that houses an IC tag equipped with an inclination sensor is embedded in a slope with high risk of collapse or the ground below the slope, and the displacement of the slope caused by landslides and other natural ground changes May be detected.

  Further, the database 64 may store information related to each pile 1 in addition to information necessary for the processing device 62 to perform determination processing such as landslide. Therefore, the active IC tag stored in the pile 1 may store only the identification information, and the database 64 may store the identification information of each pile and its installation position information in association with each other.

  The active IC tag that houses the information transmission piles according to the first to fourth embodiments may have both functions of transmitting and receiving radio waves. In this case, since the stake itself can relay information, even if the gateway device 52, the information outlet 54, the optical fiber network 56, etc. in FIG. Is built. That is, since the information transmitted by the pile is received by the adjacent pile and then transmitted, the transmitted information of each pile is reliably transferred. Therefore, a landslide detection sensor network is constructed even in an area where there is no power or communication network.

  For example, if a large number of piles 1 are arranged on a line along the slope, it is possible to grasp a situation in which an area where an abnormality such as a landslide is expanding. This is because when a landslide occurs, a large number of piles arranged in a line along the slope detect anomalies in order downward with a time difference from the upper pile. Therefore, the progress of the landslide can be grasped by specifying the pile in which the abnormality is detected in real time. Note that this abnormality is not limited to landslides, but also applies to forest fires. That is, when the area where an abnormality occurs gradually expands, a range in which the abnormality proceeds can be acquired by appropriately arranging a large number of piles.

  Furthermore, in addition to arranging a large number of piles in the vertical direction along the slope, some information transmission piles may be arranged in a horizontal direction, that is, in a direction perpendicular to a direction such as falling rocks or landslides. For example, five piles may be arranged in the horizontal direction above the slope, and only one pile may be arranged below the slope without arranging a plurality of piles in the horizontal direction. That is, in the vicinity of a place important for landslide detection, landslide can be detected more accurately by arranging a large number of piles in the horizontal direction. Specifically, even if only one of the five piles arranged in the horizontal direction detects an abnormality, the possibility of an abnormality due to a factor other than a landslide is extremely high. I do not judge it. On the other hand, it is determined that landslide has occurred for the first time when two of the five piles arranged in the horizontal direction have detected an abnormality. Thus, it is possible to prevent erroneous detection by determining that landslide has occurred only when a predetermined number or more of piles arranged in the horizontal direction detect abnormality.

  In this way, using the fact that piles can be installed in any location, accurate detection can be achieved by increasing the number of piles to be installed in locations where sensor detection is to be focused. Can do. Further, in the case of the contact type described above, when the wire is disconnected, it takes time and a considerable cost to re-stretch the wire to restore the entire surface. On the other hand, if the debris flow is detected by the pile as in this embodiment, even if the pile falls or breaks due to the debris flow, the pile is buried again at the position of the pile that has fallen or broken for restoration. All that is required is that the entire surface can be easily restored.

  In another application example of the information transmission pile according to the first to fourth embodiments, the information transmission pile 1 is disposed on the side of the roadside of the stone or the guardrail. Since this information transmission pile 1 stores an IC tag equipped with an acceleration sensor in its storage portion, when an automobile traveling on a roadway collides with a stone or a guardrail, it can detect and transmit it.

  In yet another application example, the information transmission pile 1 is embedded below the road R1. In this case, the detection information of the impact level according to the loading amount of the automobile passing on the road can be transmitted. Therefore, this can be detected when an overloaded car passes on the road R1.

  Furthermore, in another application example, as shown in FIG. 9, two or more information transmission piles 100A and 100B are spaced apart along the traveling direction F10 (F20) in the traveling lane R10 (R20) of the highway R1. Has been placed. The information transmission piles 100A and 100B are installed at substantially the center in the width direction of the traveling lane F10 (F20) so that the upper surface of the cap is substantially flush with the road surface of the road R1. Here, when the automobile A travels in the normal traveling direction F10 (F20), the automobile A passes over the second information transmission pile 100B after passing over the first information transmission pile 100A. Therefore, after the impact sensor of the active IC tag of the first information transmission pile 100A detects an impact, the impact sensor of the active IC tag of the second information transmission pile 100B detects the impact. On the other hand, if the car runs backward on the highway R1, the car A passes over the second information transmission pile 100B and then passes over the first information transmission pile 100A. After the impact sensor of the active IC tag of the information transmission pile 100B detects the impact, the impact sensor of the active IC tag of the first information transmission pile 100A detects the impact. Therefore, when the detection order of these two or more impact sensors is reversed by monitoring the detection information and each tag information of the information transmission piles 100A and 100B in the management center 60 (FIG. 8). It is possible to detect the presence of an automobile running in reverse and issue an alarm output instruction. For example, the warning is performed by conspicuously displaying characters and figures indicating that the vehicle is running backward at a position where the driver of the vehicle running backward is surely visible.

  Further, during operation, the operation of the sensor may be periodically checked at the installation location, and the battery may be replaced at that time.

Next, the information transmission pile concerning 5th Embodiment of this invention is demonstrated.
The information transmission pile according to the fifth embodiment has the same structure as the information transmission pile shown in FIGS. 1 to 3, and the difference from the first embodiment is stored in the storage unit (storage space) 14 of FIG. 10. The active IC tag 40 is provided with a vibration sensor (impact sensor) 48B as the sensor 48. The configuration of the information transmission pile 1 is the same as that described in the first embodiment except for the active IC tag 40 to be stored.

  As shown in FIG. 11, a plurality of information transmission piles 1 according to the present embodiment are laid in a river R2 along a flow path direction Fl within a predetermined interval. In addition, the information transmission pile 1 may be laid along with the direction orthogonal to the flow path direction Fl. The active IC tag 40 (FIG. 10) stored in the information transmission pile 1 has both transmission and reception functions, and the adjacent piles are arranged within a predetermined interval without being separated too much. The active IC tag of each information transmission pile 1 serves as a relay station. That is, the information transmitted by the active IC tag of the specific information transmission pile 1 is received by the adjacent information transmission pile 1 and transmitted to the information transmission pile 1 adjacent on the opposite side. In this way, for example, the information reaches the processing device 62 of the management center 60 that can receive information wirelessly or by wire from the information transmission pile 1 located on the most downstream side. Thus, in this embodiment, each information transmission pile 1 comprises the terminal (node) of a wireless sensor network. Thus, the information received by the processing device 62 of the management center 60 can be monitored.

  In this 5th Embodiment, since the pile 1 has accommodated the vibration sensor 48B, it can detect that the water flow, the debris, or the driftwood contacted or collided with the pile. That is, the processing device 62 of the management center 60 determines that these phenomena have occurred based on the received detection information. In this way, since the pile can be easily embedded in a river, the mounting location of the sensor in the river can be easily secured.

  In the pile 1 according to the sixth embodiment, as shown in FIG. 12, a sensor alarm 47 is further provided on the active IC tag 40 accommodated in the pile 1. This sensor alarm 47 is formed by integrating a vibration sensor 48B and an alarm (notification means) 43. The alarm outputs an alarm sound, an electromagnetic wave or an ultrasonic wave, an alarm such as a rotating light or a flashing light, when the vibration sensor detects a vibration of a predetermined level or higher.

  Here, if the information transmission pile 1 is buried in a place like a mountain and a part of it protrudes on the ground, an animal such as a frog or a bear may give an impact to this surveying pile. . On the other hand, since an active IC tag provided with a sensor alarm is housed in the pile 1, an animal such as a spider or a bear comes into contact with the pile as shown by a two-dot chain line. 1 shakes and the vibration sensor 48B detects the displacement of the pile, and the alarm outputs an alarm such as an alarm sound, an electromagnetic wave, or an ultrasonic wave. Thus, the animal can be repelled and the pile 1 can be prevented from being damaged by being knocked down by the animal. In addition, the information transmission pile 1 embed | buried in a mountain in this way is a surveying pile embed | buried, for example by performing a land ownership investigation etc.

  The information transmission pile 1 may store only the sensor alarm 47 without storing the IC tag 40. In this case, the detection information of the sensor is not transmitted from the information transmission pile 1, and only an alarm is generated. On the other hand, if the information transmission pile 1 accommodates an IC tag, particularly an active IC tag, it is possible to conduct a dynamic survey using detection information of the vibration sensor. This is because the location and time of appearance of animals can be acquired by collectively managing the detection information of the vibration sensors of each of the piles buried in the management center 60 (FIG. 8).

Next, the information transmission pile concerning 7th Embodiment of this invention is demonstrated.
As shown in FIG. 13, in this embodiment, the active IC tag 40 housed in the housing portion 14 of the information transmission pile 1 is provided with a sensor 48C that is a separate temperature sensor. Specifically, sensing units 48CA and 48CB made of temperature sensors are attached to the tips of cables 82A and 82B extending from the sensor port 49 of the active IC tag 40. That is, the temperature sensor is provided at a position away from the active IC tag 40. In the present embodiment, the sensor port 49 is connected to the two sensing units, the first temperature sensing unit 48CA and the second temperature sensing unit 48CB, but there may be any number of sensing units. In FIG. 13, a portion where the cable 82A extends upward from the sensor port 49 does not appear. In contrast to such a sensor configuration, the information transmission pile 1 has insertion holes 36 and 28 formed at the centers of the cushion material 30 and the protective cap 20, respectively. A cable hole 18 is provided from the lower recess 14 b to the tip 16 of the pile body 10. Thus, in the first temperature sensing unit 48CA, the cable 82A passes through the insertion holes 36 and 28 of both the cushion material 30 and the protective cap 20, and the upper surface of the top wall 24 of the cap 20, that is, the upper end portion of the pile 1 Is provided. On the other hand, the second temperature sensing unit 48CB penetrates the cable hole 18 of the pile body 10 and is provided at the tip 16 of the pile body 10, that is, the lower end portion of the pile 1. The first temperature sensing unit 48CA may be provided inside the protective cap 20.

  Since the second temperature sensing unit 48CB is thus provided at the lower end portion of the pile body 1, when the pile 1 is pulled out from the ground, the second temperature sensing unit 48CB is caught on the ground, and the cable 82B is disconnected. End up. Therefore, such an abnormality can also be detected.

An application example of the information transmission pile 1 according to the present embodiment will be described.
As shown in FIG. 14, the information transmission pile 1 is a distance marker (kilo post) provided on the road R <b> 1 and is disposed at a fixed position on the roadside. A part of the pile 1 is buried underground because it is a distance marker, but most of it exists on the ground. In addition to marking the installation position information, which is information related to the road installation position, road management information can also be labeled. Specifically, the active IC tag stored in the information transmission pile 1 stores installation position information such as latitude and longitude, and also stores road management information such as a road manager and a road type. . The installation position information and the road management information are not stored in the active IC tag itself, but only the identification number is stored in the active IC tag. You may make it acquire road management information.

  In the two sensing units 48CA and 48CB connected to the active IC tag 40 housed in the information transmission pile 1 of FIG. 13, the first sensing unit 48CA is provided at the upper end portion of the pile 1, so that the temperature in the atmosphere Since the 2nd sensing part 48CB is provided in the lower end part of a pile, the underground temperature is detected. Thus, since the temperature in the ground and the temperature in the atmosphere can be detected, it is extremely effective in determining road surface freezing.

  In the present embodiment, the active IC tag 40 is provided with two sensing units, but any number of sensing units may be provided. For example, when the pile 1 is buried in the ground, a third sensing unit (not shown) is located at a location that is substantially located on the road surface (if the pile 1 is almost half buried, the substantially central portion in the longitudinal direction of the pile 1). ) May be provided. The third sensing unit can detect not only the air and ground temperatures by the first and second sensing units, but also the road surface temperature.

Returning to FIG. 14, in this way, each pile 1 transmits detection information of two temperatures in the ground and in the atmosphere at the place where the pile 1 is buried. In this embodiment, for example, the management center 60 monitors the freezing state of roads in a predetermined area. The processing device 62 of the management center 60 can determine the frozen state of the road based on the two types of temperature detection information for each of the plurality of piles 1, the installation position information of each information transmission pile 1 and the road management information. More appropriate measures can be taken.

  As a modification of the application example of the information transmission pile in FIG. 14, the information transmission pile 1 is embedded on the side of the road, but it is not as a road sign, but for each tree planted on the side of the road, its neighborhood It may be embedded in. In this case, management information about the tree, such as planting date, pruning history, and the degree of tree growth, is recorded in the active IC tag or stored in the database using the identification number stored in the active IC tag as a key. Remember. Thereby, each tree management information can be acquired only by the motor vehicle carrying a receiver running on the highway where these trees were planted aside. However, in this case, the sensor may not be mounted on the active IC tag. In addition, the information transmission pile 1 does not need to correspond for every one tree, For example, it is good also as what manages several trees by the one information transmission pile 1. FIG. In this case, the active IC tag also stores the number of trees to be managed.

Next, the information transmission pile concerning 8th Embodiment of this invention is demonstrated.
In this embodiment, the gas sensor 48D is mounted on the active IC tag 40 housed in the hollow portion of the information transmission pile 1 shown in FIG. The configuration of the information transmission pile 1 in which the active IC tag 40 is accommodated is the same as that described in the first embodiment except for the mounted sensor.

  The information transmission pile 1 according to the present embodiment is embedded in a waste final disposal site or a landfill. In these places, wastewater and muddy water and gas are generated by waste, and it is necessary to manage them for many years. In particular, it is necessary to detect the type and amount of the detected gas. Here, the information transmission pile 1 may be installed to indicate the boundary for clarifying the area of the final disposal site or the landfill area, but any place where gas is to be detected. It may be installed in. The processing device of the management center determines whether or not the detected gas amount is within a reference value based on the gas detection information. The active IC tag 40 may store the type and amount of gas detected by the gas sensor, but the IC tag 40 stores only the identification number and acquires the type and amount of these gases from the database. May be. In a landfill or the like, it was difficult to secure a sensor mounting location, but by storing it in a pile in this way, it can be reliably installed at a predetermined location.

Next, the information transmission pile concerning 9th Embodiment of this invention is demonstrated.
As shown in FIG. 16, the pile 1 according to the present embodiment also has a pile main body 10, and its head 12 is covered with a protective cap 20. In the present embodiment, the pile body 10 is configured by connecting a plurality of divided bodies 10a, 10a, ..., 10a, 10b along the longitudinal direction of the pile 1 (the direction of the axis C). All the divided bodies have the same shape except for the divided body 10b located at the tip.

  FIG. 17A shows one of the divided bodies 10a having the same shape. The divided body 10a is composed of a columnar main body 10aa, and the main body 10aa has a storage space (storage section) 14a having a substantially transverse cross section extending upward along the central axis C thereof. As shown in FIG. 17B, the storage space 14a is for storing the active IC tag 40. In the present embodiment, the active IC tag 40 is provided with an impact sensor 48A.

The divided body 10a also has a cylindrical step portion 10ac above the main body portion 10aa. The inner diameter _{r a} of the step portion 10ac is substantially the same as the outer diameter of the body portion lOaa. A plurality of V-grooves are cut in the outer peripheral surface of the lower portion of the side wall of the main body portion 10aa to form the first uneven surface 10ad, whereas the inner peripheral surface of the step portion 10ac on the upper portion of the main body portion 10aa is also formed. A plurality of V-grooves having the same dimensions are cut to form the second uneven surface 10ae. Therefore, when connecting the two divided bodies 10a and 10a having the same shape, the divided bodies 10a and 10a may be fitted so that the V grooves of the two uneven surfaces 10ad and 10ae are engaged with each other.

  Returning to FIG. 16, it is possible to connect a plurality of divided bodies 10 a, 10 a,. The split body 10b at the tip of the pile body 10 has a plurality of V grooves formed on the inner peripheral surface of the upper step portion 10bc to form a second uneven surface 10ae, but the tip of the body portion 10ba is on the ground. Since it is driven into the taper, it has a tapered shape and no irregular surface is formed. In this way, only one end of the divided body 10b located at the tip of the pile 1 is connected.

Further, the cap 20 in this embodiment is cylindrical and the diameter of the lower portion smaller than the diameter of the upper, is substantially identical to the inner diameter r _a of the divided bodies 10a. In addition, a plurality of V-grooves are cut in the lower outer peripheral surface to form a first uneven surface 20ad. Therefore, when the pile 1 is buried and operated, the V-grooves of the first uneven surface 20ad of the cap 20 and the second uneven surface 10ae of the divided body 10a located at the uppermost part mesh with each other. In this way, the cap 20 is fitted into the divided body 10a.

The operation of the information transmission pile according to the ninth embodiment will be described.
First, the length of the rod-shaped pile main body 10 is adjusted. The length adjustment can be easily performed because it is only necessary to change the number of the divided bodies 10a to be connected. Therefore, for example, when the pile 1 is buried in the ground with a thick surface layer, the length of the pile main body 10 can be increased, and otherwise, the adjustment can be shortened.

  After that, when the pile main body 1 is buried in the ground and the cap 20 is covered, when a landslide occurs as shown in FIG. The split body 10a and the split body 10a located therebelow are disengaged, and the pile 1 is broken at the connecting portion H1 between the two split bodies 10a and 10a. Accordingly, the impact sensor 48A of the divided body 10a (the two divided bodies positioned on the upper side in the example of FIG. 18) that has changed position detects the position fluctuation, and the divided body 10a that does not change the position (the lower position in the example of FIG. 18). The impact sensor 48A of the two divided bodies) does not detect position variation. As described above, the detection information of each impact sensor 48A is transmitted from the active IC tag 40 together with the tag information, and is processed by a management center (not shown) that receives the information via a reader (not shown) or the like. The Specifically, in the example of FIG. 18, the management center can grasp that the pile 1 is broken at the connecting portion H1 between the upper two divided bodies 10a and the lower two divided bodies 10a and 10b. Therefore, it is presumed that surface layer collapse such as landslide has occurred above the connecting portion H1.

  In the first to ninth embodiments of the present invention, the sensor detection information is sequentially accumulated in the memory of the IC tag itself or the management center database 64 together with the installation position information of the information transmission pile 1 and other management information. be able to. Therefore, the processing device 62 can determine the situation such as a disaster from the change over time. In addition, by providing a plurality of piles, it is possible to acquire an area distribution such as occurrence of abnormality in a predetermined area.

In the first to ninth embodiments of the present invention, examples of an acceleration sensor, a vibration sensor, a temperature sensor, and a gas sensor have been described as sensors. However, in addition to these, a semiconductor sensor such as an illuminance sensor, an inclination sensor, a magnetic sensor, and the like It may be a sensor. However, the present invention is not limited to these sensors, and an active IC tag equipped with a required sensor is selected according to application. In particular, even while the information transmission pile 1 is buried and operating, the sensor can be added to another type by removing the cap of the information transmission pile 1 and replacing the active IC tag. Can be exchanged.

  The protective cap 20 in the pile 1 of FIGS. 1 to 17 may be formed of a phosphorescent material. With this configuration, since the cap 20 shines at night, the pile 1 that is a road sign is conspicuous and can be visually recognized. Therefore, by appropriately arranging the piles, the piles can be made to function as an evacuation route for guiding a person. Moreover, when using the pile 1 for a boundary display, the boundary can be clearly shown at night or in a dark place by the cap 20 of the phosphorescent material. Instead of the protective cap 20, part or all of the pile body 10 may be formed of a phosphorescent material, or both of the protective cap 20 and part of the pile body 10 are formed of phosphorescent material. May be. For example, a plate made of a phosphorescent material or the like may be fitted into the cap 20 and / or the pile body 10.

  Moreover, you may accommodate a GPS antenna further in an information transmission pile. When the GPS antenna is provided, the GPS module receives radio waves from the satellite via the GPS antenna and calculates the position information of the information transmission pile 1. Therefore, even if the installation position information of the information transmission pile is not stored, the position information can be acquired.

  As described above, the information transmission pile according to the present invention has been described as the main point. However, in the following, the preferred embodiment will be described with the ground deformation detection system according to the present invention corresponding to the application example of each embodiment described so far as the main point. Will be explained.

FIG. 19 is a diagram illustrating a schematic configuration of the first embodiment of the ground deformation detection system according to the present invention.
The ground fluctuation detection system of the present invention according to the embodiment shown in FIG. 19 includes information transmission piles 211a, 211b, 211c, 211d,... 211n (hereinafter referred to as “information” as appropriate). And a reading device (IC that receives identification information of the wireless IC tag 223 (wireless IC tag identification information (hereinafter referred to as “ID information”)) that is information transmitted from the information transmission pile 211. A tag reader) 212, a communication device 215 that transmits ID information received by the reading device 212 to the wireless communication network 213, and a management server 216 that receives ID information via the wireless communication network 213.

  In the embodiment shown in FIG. 19, the ID information transmitted from the communication device 215 is sent to the wireless communication network 213 via the wireless communication base station 217 located in the vicinity of the communication device 215, and further passes through the gateway 218. The data is transmitted to the management server 216 via the Internet 219 connected via the Internet.

  In the form shown in FIG. 20, the information transmission pile 211 is a cylindrical pile body in which one end side (lower side in FIG. 20) is a sharp portion and the other end side (upper side in FIG. 20) is a flat head. A portion 221 and a cylindrical lid 222 detachably screwed with a flat head on the other end side of the pile main body portion 221 are provided. A wireless IC tag 223 with a vibration detection sensor is attached to the inner bottom of the lid 222.

  The pile body 221 can be made of plastic, aluminum, stainless steel, etc., but is used by placing the sharp part side (the lower side in FIG. 20) in the soil and has a considerable strength. In addition, other materials may be used as long as they are made of a material having corrosion resistance because it is exposed to wind and rain for a long time.

In the embodiment illustrated in FIG. 19, the lid 222 is detachably attached to the head opposite to the one end side that is the sharpened portion of the pile body 221, so that the head of the pile body 221 (in FIG. 20). The upper and lower peripheral end surfaces and the inner peripheral surface of the lid 222 are formed with threaded portions 225 that are threaded together, but the detachable form is not limited thereto.

  The lid 222 can be made of plastic, but if the communication function is not hindered by exposing the antenna of the wireless IC tag 223 with a vibration detection sensor attached inside to the outside, aluminum, You may use metals, such as stainless steel.

  In the illustrated embodiment, the wireless IC tag 223 with a vibration detection sensor is attached to the inner bottom portion of the lid 222, but may be attached to the head of the pile main body portion 221. If there is no problem in both the sensor function of the vibration detection sensor and the function of the wireless IC tag 223, it can be placed in any position as long as it is in a sealed space formed by the head and the lid 222 that are not likely to be exposed to wind and rain. There can be no problem if a wireless IC tag 223 with a vibration detection sensor can be attached and maintenance such as battery replacement can be performed.

  FIG. 21A illustrates an example of a block configuration of a wireless IC tag 223 with a vibration detection sensor. In the illustrated embodiment, a wireless IC tag 223 with a vibration detection sensor includes an antenna 231, a communication circuit 232, a control circuit 233, a memory 235, an A / D conversion circuit 236, a vibration sensor 237 that is a vibration detection sensor, and a power source 238. It is prepared for.

The vibration detection sensor 237 includes a sensor that measures a gap (displacement) or a sensor that uses an eddy current effect based on a capacitance of a capacitor formed by the vibration sensor and a target measurement object. Also good.
The power source 238 is not particularly limited as long as it is used for an active IC tag, and it is considered that the power source 238 can normally be used for about two years. As described above, the battery replacement can be easily performed because the lid 222 of the information transmission pile 211 is detachable by screwing.
The A / D conversion circuit 236 converts an analog value that is a measurement value of the vibration detection sensor 237 into a digital value.

  The memory 235 records ID information that is identification information, and is configured by a recording circuit that is normally readable and writable. The ID information is identification information for each wireless IC tag 223.

  In the illustrated embodiment, the ID information for each wireless IC tag 223 is the information transmission pile 211 as identification information of the information transmission pile 211 that identifies the information transmission pile 211 in which the wireless IC tag 223 is deployed. Is recorded in the pile information recording unit 276 of the management server 216, as will be described later.

The communication circuit 232 has a function of transmitting ID information recorded in the memory 235 to the reading device (IC tag reader) 212 via the antenna 231.
The control circuit 233 has a function of controlling each component circuit, component, and the like of the wireless IC tag 223 with the vibration detection sensor. In the illustrated embodiment, the measurement value of the vibration sensor 237 is a predetermined value set in advance. When this is the case, the ID information recorded in the memory 235 is read, and the communication circuit 232 is controlled and transmitted via the antenna 231.

  As the wireless IC tag 223 with a vibration detection sensor, for example, a commercially available ultra-small active sensing tag (Seiko Precision Co., Ltd., WT-102, or WT200) can be used. This has a function of detecting vibration with a built-in mechanical vibration sensor and transmitting ID information.

  FIG. 22 is a diagram illustrating an example of a block configuration of the reading device (IC tag reader) 212 and the communication device 215. In the illustrated example, the reading device (IC tag reader) 212 includes an antenna 251, a transmission / reception unit 252 as a communication unit, a control unit 253, a recording unit 255, and a power source 256.

  The reading device (IC tag reader) 212 is a device that receives the ID information transmitted from the information transmission pile 211, and considers the receivable range and the number and position of the information transmission pile 211 depending on the installation position and the number of installations. Is determined. While the information transmission pile 211 is installed on the ground surface, the reader (IC tag reader) 212 is preferably installed at a point where it does not touch debris flow or the like.

  As the power source 256 to be used, a combination of a solar power generation device and a storage battery can be used. Unlike the wireless IC tag 223 with a vibration detection sensor used for the information transmission pile 211, since the power used by the reader (IC tag reader) is large, a power generation method using sunlight is adopted. Thereby, continuous use is possible regardless of day and night.

The antenna 251 and the transmission / reception means 252 receive ID information transmitted from the wireless IC tag 223 with the vibration detection sensor of the information transmission pile 211, and the received ID information is temporarily recorded in the recording means 255.
The control unit 253 controls the above-described units of the reading device (IC tag reader) 212, and performs a recording instruction for received ID information, transmission to a communication device 215, which will be described later, and the like. In the illustrated embodiment, the reading device (IC tag reader) 212 and the communication device 215 are close to each other, and information is transmitted and received by wire.

  The communication device 215 has a role of transmitting ID information received and collected by the reading device (IC tag reader) 212 to the wireless communication network 213. In the illustrated embodiment, the communication device 215 includes an antenna 261, a transmission / reception unit 262 that is a communication unit, a control unit 263, a recording unit 265, an amplification unit 266, and a power source 267.

  The power source 267 uses a combination of a photovoltaic power generation device and a storage battery, similarly to the reading device (IC tag reader) 212. However, either the reading device (IC tag reader) 212 or the communication device 215 is provided with a power source, It may be possible to accommodate this.

  The antenna 261 and the transmission / reception unit 262 have a function of transmitting ID information transmitted from the reader (IC tag reader) 212 to the wireless communication network 213. The ID information transmitted from the reading device (IC tag reader) 212 is once recorded in the recording unit 265.

The amplifying unit 266 has a function of amplifying output information before transmitting ID information to the wireless communication network 213.
The control unit 263 controls functions of each unit of the communication device 215 and mainly has functions such as recording of ID information transmitted from the reader (IC tag reader) 212 and a transmission command to the wireless communication network 213.

  As the reader (IC tag reader) 212, for example, a commercially available IC tag reader (Seiko Precision Co., Ltd., LF setting machine for specific low power wireless TAG WL-102) can be used, and if connected to a PC device, A mobile communication device can also be used for the communication device 215.

FIG. 23 is a diagram illustrating an example of a block configuration of the management server 216. In the example illustrated in FIG. 23, the management server 216 includes the communication unit 271, the control unit 272, the determination unit 273 for determining ground fluctuation, the information providing unit 275, and other information transmission piles 211 assigned to the information transmission pile 211, respectively. The pile information recording means 276 that records the identification information for identifying and the position information of each of the information transmission piles 211 in association with each other, the topography and geological information recording means 277, and the determination information recording means 278 that records the ground deformation determination reference information The measurement value information recording means 279 for recording the acquired information (measurement value) is provided.

  In this embodiment, the identification information that is recorded in the pile information recording means 276 and is distinguished from the other information transmission piles 211 assigned to each information transmission pile 211 is provided in each information transmission pile 211. Identification information unique to the wireless IC tag 223 (that is, ID information that is IC tag identification information for identifying another wireless IC tag).

  For example, the identification information for identifying the other information transmission piles 211 assigned to the information transmission piles 211 and the positional information of the information transmission piles 211 are associated with each other and recorded in the pile information recording unit 276. The position information of the latitude and longitude of the installation position measured by the GPS device at the time of installation of the information transmission pile 211 and identification information unique to the wireless IC tag 223 arranged in each information transmission pile 211 (that is, other wireless IC tags) ID information that is IC tag identification information for identification) is recorded in association with each other.

  In addition, the pile number of the information transmission pile 211 itself can also be used as identification information for distinguishing from the other information transmission piles 211 respectively assigned to each information transmission pile 211.

  The management server 216 may use a dedicated machine equipped with various display devices for this system, but may also be configured with a personal computer, a workstation, various communication devices, and the like.

  The measurement value information recording unit 279 records the ID information transmitted from the wireless IC tag 223 as a measurement value when the vibration sensor 237 detects a predetermined vibration value. At this time, the date / time information obtained from the ID information can be recorded as a measurement value together with the ID information as occurrence date / time information.

The determination information recording means 278 records determination criteria for determining ground deformation such as occurrence of landslide, debris flow, and landslide.
The determination means 273, which will be described later, determines the ground fluctuation based on this determination criterion and the above measured value.
As this determination criterion, for example, ID information is transmitted from each wireless IC tag 223 arranged in five or more adjacent information transmission piles 211 among a plurality of information transmission piles 211 that are continuously installed. The criteria for determining the ground fluctuation occurrence stage when the ID information is transmitted from each of the wireless IC tags 223 arranged in the adjacent information transmission piles 211 is the warning stage of the ground fluctuation when it is done. Can be adopted.

The terrain geology information recording means 277 is a record in which information such as the terrain and geology of the observation point where the information transmission pile 211 is installed is recorded in detail, and correction of determination of ground deformation is performed based on this terrain geology information. It has become.
For example, even if there are five adjacent information transmission piles 211 that have transmitted ID information, the geology of the observation point is a caution point where debris flow is likely to occur, and the correction value is multiplied by 2. Is recorded by multiplying 5 by 2 to 10 and moving it up to the ground fluctuation occurrence stage. Note that this is an exemplification, and a correction value corresponding to reality is actually set.

The determination unit 273 has a function of determining the ground fluctuation based on the measurement value information and the determination information as described above, or based on the measurement value information, the determination information, and the geological landform information.
The information providing unit 275 outputs and displays the result of the determination performed by the determining unit 273 on a display device (not shown). The display device is a display lamp, video, audio, or the like. The output can be transmitted through a communication line such as the Internet 219 in addition to the nearby location.

  The communication unit 271 has a function of receiving ID information from the information transmission pile 211 transmitted from the communication device 215 via the Internet 219 or the like, and corresponds to a communication circuit or the like built in a PC or the like.

  The control unit 272 has a function of controlling each unit of the management server 216, and corresponds to, for example, a CPU or RAM of a PC. Note that the determination unit 273 and the information providing unit 275 also exhibit the functions of the above units by operating the CPU, RAM, and the like with a predetermined application.

  Each of the recording means (276 to 279) corresponds to an external storage device such as a hard disk or a magneto-optical disk, and is connected to the communication means 271, control means 272, determination means 273, and information providing means 275 via the bus 280. Information exchange.

Next, the operation of the ground fluctuation detection system described above will be described with reference to FIG. 24 showing a flowchart of the operation procedure.
In the management server 216, the installation position (latitude and longitude, etc.) of the information transmission pile 211 installed at the observation point, the pile number, the ID information of the wireless IC tag 223 provided in each information transmission pile 211, and the like It is assumed that it is recorded in the information recording means 276.

The information transmission pile 211 transmits the ID information recorded in the memory 235 via the communication circuit 223 and the antenna 231 when the vibration sensor 237 senses a vibration greater than a preset numerical value. .
This ID information is received by the reader (IC tag reader) 212 and transmitted to the wireless communication network 213 by the connected communication device 215.
Then, it is transmitted to the management server 216 via the gateway 218 and the Internet 219 (S211).

The management server 216 aggregates the ID information of each pile transmitted continuously and records it in the measured value information recording means 279 (S212).
The determination unit 273 is related to the measurement value (transmitted ID information) recorded in the measurement value information recording unit 279 and the identification information of the installed information transmission pile 211 recorded in the pile information providing unit 276. The location information of each information transmission pile 211, the ground fluctuation judgment criteria recorded in the judgment information recording means 278, and the geological topography of the observation point as a correction value for judgment recorded in the topography and geological information recording means 277 Based on the information, the ground fluctuation is determined (S213).
The determination result is output to a display device (not shown) or the like by the information providing means 275 (S214).

As described above, the ID information of the wireless IC tag built in each information transmission pile is transmitted by vibration detection from each of the information transmission piles partially embedded in the soil of the observation point. If multiple information transmission stakes are installed, the management server 216 also obtains multiple ID information when there is ground change such as debris flow due to abnormal flooding, falling rocks, landslides, etc. Judgment can be made by analysis.
As a result, malfunctions can be prevented as much as possible, and disaster prediction is possible through analysis. In addition, unlike a contact-type detection device with a wire or the like, continuous observation is possible.
A system with a function to measure and calculate the debris flow scale, location, speed, time to reach the downstream area, and notify / warn basin residents and construction workers, etc. Can be built.
Moreover, by installing the monitoring camera, based on the transmitted ID information, the monitoring camera in the vicinity of the corresponding information transmission pile can be operated, and an image of the observation point can be acquired.

FIG. 25 is a diagram for explaining a schematic configuration of the second embodiment of the ground fluctuation detection system according to the present invention.
A difference from the above-described embodiment is that a plurality of relay devices are installed in place of the reading device (IC tag reader), and ID information is relayed and transmitted.
Therefore, different points will be mainly described, and description of common points will be omitted.

As shown in FIG. 25, between the information transmission piles 211a, 211b, 211c, 211d,..., 211n and the communication device 215, relay devices 214a, 214b,. , 214n (hereinafter referred to as “relay device 214” as appropriate).
FIG. 21B is a block configuration diagram of the relay device 214. In the illustrated example, the relay device 214 includes an antenna 281, a communication circuit 282, a control circuit 283, a memory 285, a power supply 286, and an amplification circuit 287.
The relay device 214 can use a wireless IC tag capable of communication only. For example, the relay device 214 can be configured by attaching a wireless IC tag capable of communication only in a sealed space formed by the pile body portion 221 and the lid body 222 used for the information transmission pile 211.

  In addition, when a wireless IC tag is installed in a sealed space formed by the pile body 221 and the lid 222, it is necessary not to impair the wireless function. For example, only the antenna portion is removed from the lid 222. It can be exposed.

  In this way, if the relay device 214 using the pile 211 is installed to form an ID information transmission network, continuous ground fluctuation detection can be performed even at an observation point where it is difficult to install a wireless tag reader. .

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such embodiments, and various modifications can be made within the technical scope grasped from the description of the claims. Is possible.

It is a perspective view of the information dispatch pile concerning a 1st embodiment of the present invention. It is sectional drawing along the II-II line | wire of the information transmission pile of FIG. It is sectional drawing which followed the information transmission pile of FIG. 2 along the III-III line. It is a perspective view of the cushion material used for the information transmission pile of FIG. (A) is a perspective view of the adapter used for 2nd Embodiment of this invention, (b) is a longitudinal cross-sectional view which shows the information transmission pile which uses the same adapter. (A) The lower perspective view of the protective cap of the pile concerning 3rd Embodiment of this invention, (b) is the perspective view of the storage case fitted to this protective cap, (c) used the storage case. It is a longitudinal cross-sectional view which shows an information transmission pile. It is a longitudinal cross-sectional view which shows the information transmission pile concerning 4th Embodiment of this invention. It is the schematic which shows application of the information transmission pile concerning 1st thru | or 4th embodiment of this invention. It is a figure which shows another application of the information transmission pile concerning 1st thru | or 4th embodiment of this invention, Comprising: It is the schematic which looked at the highway from the top. It is a longitudinal cross-sectional view which shows the information transmission pile concerning 5th Embodiment of this invention. It is the schematic which shows application of the information transmission pile concerning 5th Embodiment of this invention. It is a longitudinal cross-sectional view which shows the information transmission pile concerning 6th Embodiment of this invention. It is a longitudinal cross-sectional view which shows the information transmission pile concerning 7th Embodiment of this invention. It is the schematic which shows application of the information transmission pile concerning 7th Embodiment of this invention. It is a longitudinal cross-sectional view which shows the information transmission pile concerning 8th Embodiment of this invention. It is a longitudinal cross-sectional view of the information transmission pile concerning 9th Embodiment of this invention. (A) is the state which installed, (b) is a figure which shows a state when receiving external force. It is a figure which shows the one division body in the information transmission pile concerning 9th Embodiment of this invention, (a) is a perspective view, (b) is a top view. It is a longitudinal cross-sectional view of the information transmission pile concerning 9th Embodiment of this invention, and is a figure which shows a state when receiving external force. 1 is a schematic configuration diagram of a ground fluctuation detection system according to the present invention. The cross-sectional schematic of the information transmission pile which concerns on this invention. (A) is a block block diagram of the radio | wireless IC tag with a vibration detection sensor built in an information transmission pile, The same (b) is a block block diagram of the relay apparatus used by other embodiment. The block block diagram of a reader (IC tag reader) and a communication apparatus. The block block diagram of a management server. The flowchart which shows the procedure of operation | movement of a ground fluctuation detection system. The schematic block diagram of other embodiment of a ground fluctuation detection system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Information transmission pile 10 Pile main body 10a Divided body 14 Storage part 20 Cap 30 Shock absorbing material 40 IC tag 43 Notification means 48A, 48B Impact sensor 48CA 1st sensing part 48CB 2nd sensing part

Claims (13)

An information transmission stake that is partly or entirely embedded in the ground,
An information transmission pile in which an active IC tag and a sensor integrated with or separate from the active IC tag are provided, and the active IC tag transmits detection information of the sensor together with tag information to a management server that manages the detection information. In claim 1,
The active IC tag is an IC tag with a sensor, a recording unit in which IC tag identification information for identifying the other IC tag is recorded, a communication unit that transmits information by wireless communication, An information transmission pile having a control unit that transmits information via the communication unit based on measurement information of the sensor. In claim 2, the pile body is rod-shaped,
The information transmission pile which has a 1st sensing part in which the above-mentioned sensor is a temperature-humidity sensor, and this temperature-humidity sensor detects either one or both of temperature and humidity of a part of the rod-like pile main part. In claim 3, the part is an upper end part or a lower end part of the pile body,
The temperature / humidity sensor further detects a temperature and / or humidity of a lower end portion or an upper end portion of the pile body, which is located on a side opposite to the portion detected by the first sensing unit. An information transmission pile with a sensing unit.   3. The information transmission pile according to claim 1 or 2, wherein the information transmission pile is a distance marker embedded beside a road, and the tag information includes installation position information of the information transmission pile and a road on which the information transmission pile is embedded. Information dispatch pile containing either or both of information.   The information transmission pile according to claim 1 or 2, wherein the sensor is an impact sensor and is embedded in the ground where position fluctuation may occur. In claim 1, the pile is rod-shaped, has an axial center along the longitudinal direction,
A plurality of divided bodies are connected in the axial direction,
The sensor includes an impact sensor provided in each of the plurality of divided bodies, and when one of the adjacent divided bodies receives a predetermined external force in a direction perpendicular to the axis, the one divided body is An information transmission pile that is set to be separated from the other divided body and transmits detection information of the impact sensor together with corresponding tag information. At least one or more information transmission piles according to any one of claims 1 to 7 installed at a predetermined observation point,
A detection system comprising the management server, wherein the management server acquires and manages information including detection information transmitted from the information transmission pile. At least one information transmission pile according to any one of claims 1, 2 , 6 and 7 installed at a predetermined observation point,
Comprising the management server;
This management server acquires and manages information including detection information transmitted from the information transmission pile,
Measurement value information recording means for recording the acquired information as a measurement value;
Pile information recording means for associating and recording the identification information for identifying the other information transmission piles assigned to the information transmission piles and the positional information of each of the information transmission piles,
Determination information recording means for recording ground fluctuation determination reference information, and determination means for determining ground fluctuation,
The determination means includes a measurement value recorded in the measurement value information recording means, identification information and position information of the information transmission pile recorded in the pile information recording means, and a determination criterion recorded in the determination information recording means. A ground deformation detection system that determines ground deformation based on information.   In Claim 9, acquisition by the management server of the information transmitted from the said information transmission pile is the reading apparatus which receives the information transmitted from the said information transmission pile, and the said information received with this reading apparatus to a wireless communication network A communication apparatus for transmission and a ground fluctuation detection system performed via the wireless communication network.   In Claim 9, the acquisition by the management server of the information transmitted from the said information transmission pile is at least 1 or more relay apparatus which receives the information transmitted from the said information transmission pile, relays, and this relay apparatus A communication device that transmits the information received from the wireless communication network, and a ground fluctuation detection system that is performed via the wireless communication network.   12. The management server according to any one of claims 9 to 11, further comprising terrain geology information recording means for recording terrain geology information of the observation point where the information transmission pile is installed, wherein the determination means is a ground. A ground change detection system that performs correction based on the topographic and geological information in the determination of change. A system for detecting reverse running on a highway,
The information transmission pile according to claim 1 or 2 is provided with two or more, and each of the sensors is an impact sensor, and the two or more information transmission piles are spaced from each other along the traveling direction on the road surface of the expressway. A reverse running detection system that is buried and detects reverse running on a highway based on detection information of the sensor.

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