Invasive factor detection device and system using the same

Abstract

To provide a detection device capable of operating stably for a long time of period, and at the same time, capable of being restored easily at low cost.SOLUTION: An invasive factor detection device of the present invention comprises: an invasive factor receiving part that receives an invasive factor that invades a predetermined area; a fixing part for installing the invasive factor receiving part in or near the predetermined area; and a detection unit that detects that the invasive factor receiving part has received the invasive factor. The detection unit comprises: a first member fixed to the invasive factor receiving part; a second member fixed to the fixing part; a relatively fragile coupling mechanism that couples the first member and the second member; and an invasive factor intrusion detection part that generates an electromotive force due to the relative displacement between the first member and the second member, and uses the electromotive force to wirelessly transmit at least unique ID information to the outside.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a detection device for detecting an intrusion factor generated in an intrusion factor generation area and a system using the same.

Background Art

[0002] Conventionally, as a method for detecting intrusion factors such as falling rocks at locations where the occurrence of intrusion factors is assumed due to natural disasters (such as slopes and tops of hills, valleys, river and lake embankments, etc.), there has been one configured by laying wiring as a disaster detection line. In the detection method using a disaster detection line, changes in the land state and the like, which are precursors of natural disasters, can be detected by disconnection or short-circuit of the wiring caused by falling rocks or the like. (Patent Document 1) In addition, there has been one in which a group of falling rock detection fences is arranged near the falling position of the intrusion factor, and a detection operation is performed when the falling rock detection fence is inclined at an angle larger than a predetermined angle due to the collision of an intrusion factor such as a falling rock. That is, a sensor wire is provided along the upper part of the falling rock detection fence provided between a pair of erected fence supports, one end of the sensor wire is fixed to one support, and the other end is connected to a sensor box provided on the other support. With such a configuration, by detecting the pulling out of the sensor wire due to the inclination of the falling rock detection fence and detecting the falling rock, it is possible to surely detect a falling rock of a predetermined size and prevent inadvertent detection due to contact with small animals or the like. (Patent Document 2)

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technology disclosed in Patent Document 1 detects intrusion factors by laying wiring over a wide area and detecting breaks in the wiring, but since it is necessary to lay wiring over a wide area, it takes time to install and the installation costs are high because the wires are long. There is also a risk of false detection due to small animals or broken branches getting caught in the wiring, or vines wrapping around and tightening the wiring, causing breaks.

[0005] The technology in Patent Document 2 can control the detection angle by tilting the rockfall detection fence, thereby preventing false detections caused by small animals or branches, etc., but has the problem that it uses sensor wires for detection, which takes time and is expensive to install.

[0006] The present invention aims to solve the above-mentioned problems, and to provide a detection device that can be easily installed even when the installation area is wide, that reliably detects the detection target while preventing malfunctions due to objects that do not need to be detected, that is capable of stable operation over a long period of time, and that can be easily and inexpensively repaired. [Means for solving the problem]

[0007] The invasive agent detection device of the present invention comprises an invasive agent receiving section that receives an invasive agent that invades a specified area, a fixing section for installing the invasive agent receiving section within or near the specified area, and a detection unit that detects that the invasive agent receiving section has received the invasive agent, and the detection unit comprises a first member fixed to the invasive agent receiving section, a second member fixed to the fixing section, a non-fragile connecting mechanism that connects the first member and the second member, and an invasive agent intrusion detection section that generates an electromotive force by relative displacement between the first member and the second member and uses the electromotive force to wirelessly transmit at least unique ID information to the outside.

[0008] In the intrusion detection device according to the present invention, the electromotive force caused by the intrusion detection unit for an intrusion agent is generated by electromagnetic induction.

[0009] In the intrusion factor detection device according to the present invention, the intrusion factor intrusion detection unit generates an electromotive force due to a change in the direction of the magnetic flux of the iron core passing through the coil caused by the relative displacement between the first member and the second member.

[0010] In the intrusion factor detection device according to the present invention, the intrusion factor intrusion detection unit has an elastic deformation member, and when the first member and the second member are relatively displaced, the elastic deformation member returns from the elastically deformed state, so that the poles of the magnet in contact with the iron core are forcibly switched, and the direction of the magnetic flux of the iron core passing through the coil changes to generate an electromotive force.

[0011] In the intrusion factor detection device according to the present invention, the relatively fragile connection mechanism has a cylindrical member formed in a cylindrical shape, and connects the first member and the second member so as to surround them.

[0012] In the intrusion factor detection device according to the present invention, the relatively fragile connection mechanism connects the first member and the second member via a sliding mechanism.

[0013] In the intrusion factor detection device according to the present invention, the first member and the second member are biased in a direction in which the first member and the second member approach each other by the elastic force of a spring member.

[0014] In the intrusion factor detection device according to the present invention, the intrusion factor receiving portion and the first member are connected via a first attachment / detachment mechanism.

[0015] In the intrusion factor detection device according to the present invention, the intrusion factor receiving portion is a single tube, and the attachment / detachment mechanism has a boss portion that fits into an end portion of the single tube on one side and a screw portion that is screwed into the first member on the other side.

[0016] In the intrusion factor detection device according to the present invention, the fixing portion and the second member are connected via a second attachment / detachment mechanism.

[0017] The intrusion factor detection device according to the present invention is such that the intrusion factor receiving part includes any one of a pole part, a fence, a beam, a rockfall protection net, and a wire.

[0018] The intrusion factor detection system according to the present invention includes a plurality of the intrusion factor detection devices, and a monitoring device that receives signals from the plurality of intrusion factor detection devices and displays information based on the received signals.

[0019] The intrusion factor detection system according to the present invention includes a relay device between the plurality of intrusion factor detection devices and the monitoring device, and the relay device is wirelessly connected to the plurality of intrusion factor detection devices and is also wirelessly connected to the monitoring device.

[0020] The intrusion factor detection system according to the present invention is such that the plurality of intrusion factor detection devices include a fence, a beam, a rockfall protection net, or a wire installed between adjacent intrusion factor detection devices.

Advantages of the Invention

[0021] According to the present invention, even when the installation range is extensive, it can be easily installed, and while suppressing malfunction due to objects not to be detected, the objects to be detected can be surely detected, and stable operation is possible over a long period of time. At the same time, it can be easily and inexpensively repaired.

Brief Description of the Drawings

[0022]

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Mode for Carrying Out the Invention

[0023] <First Embodiment> Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. The dimensions, materials, shapes, and relative arrangements of the components described as the embodiment or shown in the drawings are merely illustrative examples, and are not intended to limit the scope of the present invention to the above-mentioned contents. For example, expressions expressing a relative or unambiguous arrangement such as "parallel," "orthogonal," "vertical," "center," "concentric," or "coaxial" not only strictly express such an arrangement, but also express a state in which the objects are relatively displaced with an angle and distance to the extent that the same function is obtained. For example, expressions expressing that things are in an equal state such as "same," "equal," "uniform," and "equal density" not only strictly express a state in which the objects are equal, but also express a state in which there is a tolerance, or a difference or ratio to the extent that the same function is obtained. For example, expressions expressing shapes such as a triangular pyramid, a cone, a triangular prism, and a cylinder not only express shapes such as a triangular pyramid, a cone, a triangular prism, and a cylinder in the strict geometric sense, but also express shapes including uneven parts and chamfered parts to the extent that the same effect is obtained. On the other hand, the expressions "comprise," "formed by," "include," "have," "include," or "have" of one element are not exclusive expressions excluding the presence of other elements.

[0024] FIG. 1 shows an example of installation of an intrusion agent detection system 1 to which the present invention is applied.

[0025] As shown in FIG. 1, a plurality of intrusion factor detection devices 10 are disposed, for example, on a slope 3 beside a road 2 on which vehicles (not shown) travel.

[0026] The slope 3 is, for example, a topographical surface formed naturally or artificially in a vertical and / or inclined shape, and is formed along the road 2. From a position away from the road 2 toward the road 2, the slope 3 has, in that order, an inclined slope 3a that can cause slope disasters and the like, and a concrete retaining wall 3b erected so as to directly prevent the collapse of the lower part of the slope 3a.

[0027] The intrusion factor detection device 10 detects that an intrusion factor M such as earth and sand or falling rocks generated on the slope 3a due to slope disasters including landslides, collapses, and debris flows has collided, and wirelessly transmits the detection information obtained from this detection to a field receiving device 53 described later. A plurality of the devices are installed at substantially equal intervals on a plane on the retaining wall 3b of the slope 3. The installation interval is appropriately set according to parameters such as the type and frequency of natural disasters occurring in the installation area, the shape such as the inclination angle of the slope, and the properties and particle sizes of the earth and sand forming the slope.

[0028] The field receiving device 53 is arranged at a position where it can receive the detection information wirelessly transmitted from a plurality of intrusion factor detection devices 10 within a certain range (communication range). It receives the detection information from the intrusion factor detection device 10 and wirelessly transmits it to a remote monitoring device 55 described later.

[0029] The monitoring device 55 is wirelessly connected to a plurality of field receiving devices 53, and displays information based on the detection information from the intrusion factor detection device 10 collected via the field receiving device 53 so that it can be visually recognized, thereby notifying the occurrence of earth and sand collapses and the like. In addition to displaying it so that it can be visually recognized, for example, it may make a sound so that it can be aurally recognized, or vibrate a vibrating body so that it can be tactilely recognized.

[0030] The intrusion factor occurrence area A is an area where the occurrence of the intrusion factor M due to slope disasters and the like is assumed. In the present invention, it is an area on the slope 3a. Here, the intrusion factor M is a dust flow, an earth and sand flow, a debris flow, a pyroclastic flow, a lava flow, a tsunami, a flood, an avalanche, a falling rock, a falling boulder, a fallen tree, a floating log, an earth and sand collapse, a rock mass collapse, a liquid flow, a sand-like flow, a group of small stones, etc.

[0031] In FIG. 1, the intrusion factor detection device 10 is installed beside the road 2, but it may also be installed near a house, a facility, or near a railway line where the occurrence of a disaster due to the intrusion factor M is expected in the vicinity of the intrusion factor occurrence area A that may have a great impact on civilian life.

[0032] Next, the intrusion factor detection device 10 will be described with reference to FIGS. 2 to 8. FIG. 2 is a partially exploded perspective view, FIG. 3 is a perspective view, FIG. 4 is a cross-sectional view, FIG. 5 is an exploded perspective view of the detection unit, FIG. 6 is a schematic diagram of the electromagnetic induction power generation unit, FIG. 7 is an exploded perspective view of the fixing unit, and FIG. 8 is a block diagram of the intrusion factor detection system.

[0033] The intrusion factor detection device 10 is configured to detect that an intrusion factor M such as earth and sand, falling rocks, muddy water, running water, etc. caused by a slope disaster or the like occurring within the intrusion factor generation area A has collided. As shown in FIG. 2, it includes three units: an intrusion factor receiving part 11, a detection unit 12, and a fixing part 13. The three units are such that the intrusion factor receiving part 11 mainly has the function of receiving the collision of the intrusion factor M, the detection unit 12 mainly has the function of detecting the collision, and the fixing part 13 mainly has the function of fixedly fixing the intrusion factor detection device 10 at the installation position. As shown in FIGS. 3 and 4, a pole support part 15 into which the intrusion factor receiving part 11 is inserted is screwed onto one surface (the upper side in FIG. 2) of the detection unit 12, and a boss screw 41 of the fixing part 13 is screwed onto the other surface (the lower side in FIG. 2) of the detection unit 12, whereby the three units are detachably connected.

[0034] The intrusion factor receiving part 11 has a pole part 14 and a pole support part 15.

[0035] The pole part 14 is for receiving the intrusion factor M within the intrusion factor generation area A. It is formed of a high-strength material such as metal, has a hollow cylindrical shape, and has a hollow part 14a.

[0036] The pole support portion 15 has a substantially cylindrical shape, with a male thread portion 17 formed on one outer circumference, and is detachably screwed into a female thread portion 22 of a first member 18 of a detection unit 12 described later. The portion of the pole support portion 15 other than the male thread portion 17 forms a fitting boss portion 16 that is inserted into and fitted with the hollow portion 14a of the pole portion 14. The fitting boss portion 16 is formed such that the diameter of its outer circumference is the same as or slightly smaller than the diameter of the inner circumference of the hollow portion 14a of the pole portion 14. By detachably fitting the hollow portion 14a of the pole portion 14, the pole portion 14 inserted into the fitting boss portion 16 is held in an upright state.

[0037] Here, the shape and material of the pole portion can be variously selected as long as it can withstand the impact caused by the collision of the intrusion factor M, is not easily damaged (has impact resistance), and can withstand long-term outdoor use (has weather resistance, fatigue resistance, etc.). As the shape, in the first embodiment, it is formed with a circular cross-section, but it may also be a polygonal cross-section, an elliptical cross-section, an H-shaped cross-section, an I-shaped cross-section, an L-shaped cross-section, an M-shaped cross-section, a T-shaped cross-section, a U-shaped cross-section, a V-shaped cross-section, an X-shaped cross-section, a Y-shaped cross-section, a cross-shaped cross-section, a C-shaped cross-section, etc. Also, in the first embodiment, although the whole is a hollow cylindrical shape, only the portion that fits with the fitting boss portion 16 may be a hollow cylindrical shape, and the other portions may be formed solid. The material is not limited to metal, and it may be composed of plastic, wood, or a composite material thereof. In addition, a hollow cylindrical pipe called a "single-pipe (single-pipe scaffold)", which is a general-purpose product (standard product) widely used as a steel material for temporary scaffolds in construction work, can also be used as the pole portion. Since single-pipe scaffolds are widely distributed in the market, they can be easily procured in a short period, and since they are mass-produced products, the cost can be suppressed.

[0038] Here, the male thread portion 17 of the pole support portion 15 and the female thread portion 22 of the detection unit 12 constitute a first detachment mechanism. However, the pole support portion 15 can also be considered as a part of the detection unit 12. In this case, the fitting boss portion 16 of the pole support portion 15 and the portion of the hollow portion 14a of the pole portion 14 that fits with the fitting boss portion 16 constitute the first detachment mechanism.

[0039] The detection unit 12 has the intrusion factor receiving part 11 attached thereto. When the intrusion factor receiving part 11 topples due to the collision of the intrusion factor M, a part thereof is deformed (damaged) to generate an electromotive force, and the unique (identification) ID information is wirelessly output to the outside using the electromotive force. Note that the ID information also functions as a detection signal generated when the collision of the intrusion factor M is detected.

[0040] The specific configuration will be described with reference to FIGS. 5(a) and 5(b). FIG. 5(a) is an exploded perspective view of the detection unit 12 as viewed from above, and FIG. 5(b) is an exploded perspective view as viewed from below.

[0041] The first member 18 has a low-profile rectangular parallelepiped shape, and an upper concave portion 20 and a lower concave portion 21 are respectively formed on the upper surface and the lower surface with an intermediate partition portion 19 therebetween. The upper concave portion 20 forms a substantially cylindrical space, and a female screw portion 22 into which the male screw portion 17 of the pole support portion 15 is screwed is formed on the inner peripheral surface thereof. The lower concave portion 21 forms a substantially rectangular parallelepiped-shaped space, and the intrusion factor intrusion detection portion 24 described later is accommodated therein. Further, the first member 18 is formed with a first member side relatively fragile connection cylinder fitting portion 23 that forms a step portion into which a relatively fragile connection cylinder 27 described later is fitted below the outer peripheral surface.

[0042] The intrusion factor intrusion detection portion 24 includes a case 25 having a low-profile rectangular parallelepiped shape, and a pair of switches 26a and 26b provided so as to respectively protrude from a pair of opposing side surfaces of the case 25. The case 25 is fixedly accommodated in the lower concave portion 21 of the first member 18. Fixation into the lower concave portion 21 can also be performed by adhering the upper surface of the case 25 to the bottom surface of the lower concave portion 21 with an adhesive or double-sided tape or the like, and the method is not particularly limited. Inside the case 25, as will be described later, an electromagnetic induction type electromotive force generation portion 50 that generates an electromotive force by electromagnetic induction when the switches 26a and 26b operate, and a wireless transmission control portion 51 that wirelessly transmits an electrical signal to the outside using the power are provided. The switches 26a and 26b are formed to have substantially the same length as one side of the case 25 and are configured to be swingable between an upper pressing position and a lower initial position.

[0043] A conceptual diagram of the switch 26a (26b) and the electromagnetic induction power generation unit 50 is shown in FIG. 6. The switch 26a (26b) is swingable about the shaft 26a1 in the case 25. One operating portion 26a2 projects outside the case 25 with the shaft 26a1 interposed therebetween, and the other acting portion 26a3 is in contact with a magnet 50c, which will be described later, inside the case 25.

[0044] The electromagnetic induction power generation unit 50 includes a coil 50a, an iron core 50b, a magnet 50c, a coil spring 50d as an elastic deformation member, and the like. The iron core 50b has a rectangular shape with a part of the long side cut out. The magnet 50c is disposed in the cutout portion 50b1, and the coil 50a is wound around the long side portion 50b2 without the cutout. The long side portion 50b2 of the iron core 50b passes through the approximate center of the coil 50a. The coil 50a generates a voltage (electric power) at two terminals 50a1 and 50a2 by electromagnetic induction.

[0045] The magnet 50c has a substantially H-shaped configuration including a pair of parallel portions 50c1 and 50c2 and a connecting portion 50c3 that extends perpendicular to the parallel portions 50c1 and 50c2 so as to connect the vicinity of the centers of the respective parallel portions 50c1 and 50c2. End portions 50b3 and 50b4 that constitute the notch portion 50b1 of the iron core 50b are respectively arranged to enter a pair of recesses 50c4 and 50c5 formed with the connecting portion 50c3 that connects the pair of parallel portions 50c1 and 50c2 interposed therebetween. The center of the connecting portion 50c3 is swingably supported on a swing axis 50c6 located on an imaginary line connecting the notched end portions 50b3 and 50b4 of the iron core 50b. Thereby, the magnet 50b is swingable to two positions (referred to as a "first swing position" and a "second swing position") where the end portions 50b3 and 50b4 of the iron core 50b abut against something on the parallel portions 50c1 and 50c2 within the recesses 50c4 and 50c5. Here, of the pair of parallel portions 50c1 and 50c2, one parallel portion 50c1 is an N pole and the other parallel portion 50c2 is an S pole. As shown in FIG. 6(a), when the S pole (parallel portion 50c2) abuts against one end portion 50b3 of the iron core 50b, the N pole (parallel portion 50c1) abuts against the other end portion 50b4 of the iron core 50c (the position of the magnet 50c at this time is referred to as the "first swing position"). As shown in FIG. 6(b), when the N pole (parallel portion 50c1) abuts against one end portion 50b3 of the iron core 50b, the S pole (parallel portion 50c2) abuts against the other end portion 50b4 of the iron core 50c (the position of the magnet 50c at this time is referred to as the "second swing position").

[0046] The coil spring 50d, by the biasing force due to its elasticity, holds one end of the parallel portion 50c1 of the magnet 50c pushed down to the first swing position as shown in FIG. 6(a). In conjunction with this, the switch 26a (26b) that abuts against the other end of the parallel portion 50c1 has its operating portion 26a2 pushed down and its acting portion 26a3 pushed up to be in the initial position. From this state, as shown in FIG. 6(b), when the operating portion 26a2 of the switch 26a (26b) is pushed up to the pressing position, the acting portion 26a3 swings the magnet 50c to the second swing position, whereby the coil spring 50d is elastically deformed against the biasing force.

[0047] By having the configuration as described above, in conjunction with the operation of the switch 26a (26b), the magnet 50c swings between the first swing position and the second swing position, and the poles contacting the ends 50b3 and 50b4 of the iron core 50b are switched, thereby generating an electromotive force of about 200 μJ by utilizing Faraday's law of electromagnetic induction. Specifically, when not receiving the collision of the intrusion factor M, the switch 26a (26b) is pressed by the protrusions 32a (32b) provided on the second member 30 to be described later, and as shown in FIG. 6(b), the magnet 50c is located at the second swing position. Thereafter, when the intrusion factor receiving portion 11 receives the intrusion factor M and the pressing of the switch 26a (26b) by the protrusion 32a (32b) is released, the elastic deformation state of the coil spring 50d is released and returns from the elastic deformation state. As shown in FIG. 6(a), the magnet 50c swings about the swing axis 50c6 and swings to the first swing position. As a result, the contact location between the iron core 50b and the magnet 50c changes, and the direction of the magnetic flux passing through the iron core 50b passing through the center of the coil 50a changes, thereby generating an electromotive force in the coil 50a.

[0048] Returning to FIG. 5, the relatively fragile connecting cylinder 27 is formed as a short-angle pipe formed by bending a strip-shaped thin plate into a square shape and is formed to have lower rigidity than the peripheral member. On the upper side of the inner circumference of the relatively fragile connecting cylinder 27, there is a first member fitting portion 28, and on the lower side of the inner circumference, there is a second member fitting portion 29. The first member fitting portion 28 fits with the outer circumference of the first member side relatively fragile connecting cylinder fitting portion 23 of the first member 18, and the second member fitting portion 29 fits with the outer circumference of the second member side relatively fragile connecting fitting portion 31 of the second member 30 to be described later. The inner circumference of the first member fitting portion 28 is formed to be the same as or slightly larger than the outer circumference of the first member side relatively fragile connecting cylinder fitting portion 23 of the first member 18, and the first member fitting portion 28 and the first member side relatively fragile connecting cylinder fitting portion 23 are slidable and fitable. The inner circumference of the second member fitting portion 29 is formed to be the same as or slightly larger than the outer circumference of the second member side relatively fragile connecting cylinder fitting portion 31 of the second member 30, and the second member fitting portion 29 and the second member side relatively fragile connecting cylinder fitting portion 31 are slidable and fitable.

[0049] Here, the relatively fragile connecting cylinder 27 constitutes a relatively fragile connecting mechanism. The relatively fragile connecting cylinder 27 is formed of a material that is more fragile than the first member and the second member, and it may be formed so as to be deformed and / or damaged by the application of an external force to the first member due to the impact of the intrusion factor M on the intrusion factor receiving portion 11. By adjusting the fragility (rigidity) by selecting the material of the relatively fragile connecting cylinder 27 or changing its shape (width, thickness, height, punching process, etc.), it is possible to appropriately change the ease of deformation (damage susceptibility) of the relatively fragile connecting cylinder 27 according to the object to be detected.

[0050] The second member 30 has a low rectangular parallelepiped shape, and on the upper part of its outer peripheral surface, a second member side relatively fragile connecting cylinder fitting portion 31 that forms a step portion into which the relatively fragile connecting cylinder 27 is fitted is formed. On the upper surface of the second member 30, eight protrusions are formed in two parallel rows with N protrusions each, namely protrusions 32a and 32b. The protrusions 32a and 32b are respectively arranged at positions that abut against the switches 26a and 26b of the intrusion factor intrusion detection portion 24. Further, when the detection unit 12 (the first member 18, the intrusion factor intrusion detection portion 24, the relatively fragile connecting cylinder 27, and the second member 30) is assembled, the protrusions 32a and 32b respectively abut against the switches 26a and 26b of the intrusion factor intrusion detection portion 24 and press against the biasing force of the coil spring 50d. On the lower surface of the second member 30, a lower recess 33 is formed. The lower recess 33 forms a substantially cylindrical space, and an internal thread portion 34 into which a boss male thread portion 41 of a fixing portion 13 described later is screwed is formed on its inner peripheral surface.

[0051] Here, a configuration is adopted in which the intrusion factor intrusion detection device 24 having switches 26a and 26b is fixed to the first member 18, and protrusions 32a and 32b that abut against the switches 26a and 26b are provided on the second member 30. Conversely, a configuration may be adopted in which protrusions are provided on the first member 18 and the intrusion factor intrusion detection device is fixed to the second member 30.

[0052] As shown in the enlarged cross-sectional view of FIG. 4, when the detection unit 12 is assembled, the first member 18 and the second member 30 are in contact with each other. In this state, the width of the relatively fragile connecting cylinder 27 is adjusted so that the relatively fragile connecting cylinder 27 fits exactly into the concave groove formed by the stepped portion of the first member 18 and the stepped portion of the second member 30. Incidentally, the overlapping width between the first member side relatively fragile connecting cylinder fitting portion 23 of the first member 18 and the first member fitting portion 28 of the relatively fragile connecting cylinder 27 and the overlapping width between the second member side relatively fragile connecting cylinder fitting portion 31 of the second member 30 and the second member fitting portion 29 of the relatively fragile connecting cylinder 27 are formed to have substantially the same length.

[0053] The fixing part 13 is for fixedly mounting the detection unit 12 and is fixed at a predetermined position on the retaining wall 3b on both sides of the road 2 close to the intrusion factor generation area A where the occurrence of the intrusion factor M such as slope disasters is assumed, and is embedded in the concrete constituting the retaining wall 3b.

[0054] Specifically, as shown in FIG. 7, it has a detection unit fixing part 40 and a fixing rod 43.

[0055] The detection unit fixing plate 40 has a plate shape forming a rectangle, a boss male screw part 41 protrudes and is provided on the upper surface, and through holes 42 penetrating from the upper surface to the lower surface are respectively formed at the four corners. The boss screw 41 is screwed into the female screw part 34 on the lower surface of the second member 30 of the detection unit 12 described above.

[0056] The fixing rod 43 is a so-called deformed reinforcing bar having a substantially circular cross-section and a long bar shape, with uneven protrusions formed on the outer peripheral surface, and a male screw portion 44 is formed at one end. The male screw portion 44 of the fixing rod 43 is set to a diameter that can be inserted into the through-hole 42 of the detection unit fixing plate 40, and the portion other than the male screw portion 44 of the fixing rod 43 is set to a diameter that cannot be inserted into the through-hole 42. The fixing rod 43 is inserted into the through-hole 42 from the lower surface side of the detection unit fixing plate 40 with the male screw portion 44, and is fixed to the detection unit fixing plate 40 by screwing the nut 45 from the tip portion of the male screw portion 44 protruding from the upper surface side. Here, the fixing rod 43 is a deformed reinforcing bar, but it may be any object that can be fixed with appropriate strength, and it is not necessarily required to be a deformed reinforcing bar.

[0057] Here, the female screw portion 34 of the detection unit 12 and the boss male screw portion 41 of the fixing portion 13 constitute the second detachable mechanism.

[0058] Next, the block diagram of the intrusion factor detection system 1 will be described with reference to FIG. 8.

[0059] The intrusion factor intrusion detection unit 24 includes the above-described case 25, switches 26a and 26b, and electronic device elements such as an electromagnetic induction type electromotive force generation unit 50 and a wireless transmission control unit 51 housed in the case 25.

[0060] As shown in FIG. 6, the electromagnetic induction type electromotive force generation unit 50 includes a coil 50a, an iron core 50b, and a magnet 50c. In conjunction with the operation of the switches 26a and 26b, the magnet 50c swings, the contact location between the iron core 50b and the magnet 50c changes, and the direction of the magnetic flux passing through the iron core 50b passing through the center of the coil 50a changes, thereby generating an electromotive force of about 200 μJ in the coil 50a. The electromotive force is converted into a stable DC supply voltage to drive the wireless transmission control unit 51 described later.

[0061] The wireless transmission control unit 51 is driven by receiving the generated electromotive force from the electromagnetic induction type electromotive force generation unit 50, and controls to wirelessly transmit the unique identification ID information assigned to each of the individual intrusion factor intrusion detection units 24 to the outside via an antenna. The communication by the wireless transmission control unit 51 can be set to, for example, a communication distance of several meters to several kilometers, a frequency band of 928 MHz, a transmission speed of 125 kbps, etc., but is not limited thereto. Also, as the information to be transmitted, installation position information etc. associated with the identification ID information may be written in advance, and the position information may be transmitted together with the ID information at the time of transmission.

[0062] The communication frequency band of the wireless transmission may be 135 kHz to 30 GHz, and is appropriately set according to the data amount, transmission speed of the data to be transmitted, and regulations according to the radio law of the country of use.

[0063] The on-site receiving device 53 includes a relay communication control unit 53a. The relay communication control unit 53a receives the ID information from the intrusion factor intrusion detection unit 24 via an antenna, and can be configured to transmit this wirelessly to the outside via an antenna, transmit it by wire, or transmit a report.

[0064] The on-site receiving device 53 is arranged within a region where wireless communication is possible with the intrusion factor intrusion detection unit 24, and can receive the ID information from a plurality of intrusion factor intrusion detection units 24 within the region. When a large-scale debris flow etc. occurs, it can sequentially receive the ID information from a plurality of intrusion factor intrusion detection units 24.

[0065] The monitoring device 55 includes a control unit 55a, a storage unit 55b, a receiving unit 55c, and a notification unit 55d. The monitoring device 55 may be configured by, for example, a general-purpose desktop personal computer or notebook personal computer.

[0066] The control unit 55a receives, via an antenna, the ID information wirelessly transmitted from the on-site receiving device 53 by the receiving unit 55c, stores it in the storage unit 55b together with the reception time, and based on the stored information, visually displays on the display when and which individual (location)'s intrusion factor detection unit 24 (intrusion factor detection device 10) detected the intrusion factor M such as a falling rock.

[0067] An on-site receiving device 53 as a relay device is installed between the intrusion factor detection device 10 (intrusion factor intrusion detection unit 24) and the monitoring device 55. Since the on-site receiving device 52 is installed at a position where a power source can be secured away from the area where a disaster is expected to occur where the intrusion factor detection device 10 is installed, it is possible to use a current larger than the electromotive force generated by the intrusion factor intrusion detection unit 24, and the distance between the intrusion factor detection device 10 and the monitoring device 55 can be separated by about 200 to 3000 m. The on-site receiving device 53 and the monitoring measure 51 can also communicate via an existing mobile phone line, and by doing so, the monitoring device 55 can be installed at a remote location.

[0068] Also, the monitoring device 55 and the on-site receiving device 53 can be connected by wire (such as a LAN cable or an optical fiber cable). When connected by wire, high-speed communication is possible, so even if the distance between the monitoring device 55 and the on-site receiving device 53 is a remote location, the ID information from the intrusion factor intrusion detection unit 24 can be notified more reliably without delay. Examples of wired connections include direct connections of high-speed lines such as optical lines and intranets, but as long as reliable notification without delay is possible, connections via the Internet or a mobile communication network are also acceptable. Also, as a notification method, in addition to displaying on the display of the monitoring device 55, it also includes sending an e-mail or the like to other personal computers, mobile phones, mobile terminals such as smartphones, etc. to notify that a disaster has been detected.

[0069] Next, an example of the process of installing the intrusion factor detection device 10 is shown below. Step 1. Excavate a buried hole at the installation position of the intrusion factor detection device 10, having a gap with the fixing part 13 that can ensure a sufficient overlapping thickness. Step 2. Place the fixing rod 43 of the fixing part 13 into the buried hole, pour fresh concrete into the buried hole, and cure the concrete to fix the fixing part 13 at the installation position. Step 3. Screw the female screw part 34 formed on the lower surface of the detection unit 12 onto the boss screw 41 on the detection unit fixing plate 40 of the fixing part 13 to fix the detection unit 12 to the fixing part 13. Step 4. Screw and fix the male screw part 17 of the pole support part 15 onto the female screw part 22 formed on the upper surface side of the detection unit 12. Step 5. Fix the intrusion factor receiving part 11 to the detection unit 12 by inserting and fitting the pole support part 15 fixed to the upper surface of the detection unit 12 into the hollow cylindrical pole part 14.

[0070] Depending on the installation location, instead of excavating a buried hole, a formwork for pouring fresh concrete may be prepared, and the fixing rod 43 may be arranged in the formwork.

[0071] Also, even if the installation location is soil, if the fixing part 13 can be securely fixed, for example, as shown in Fig. 10(b), the tip of the fixing part may be formed in a shape like a sharp spear, and the fixing rod 43 of the fixing part 13 may be directly stabbed into the installation location for fixing.

[0072] Before fixing the detection unit 12 to the fixing part 13, the pole support part 15 may be pre-screwed and fixed to the detection unit 12 in advance. Further, the intrusion factor receiving part 11 may be pre-fitted to the pole support part 15 in advance.

[0073] The operation by having the above configuration will be described below.

[0074] Due to earthquakes, heavy rains, etc., an intrusion factor M such as landslides, collapses, and debris flows on the slope 3a occurs, and when the intrusion factor M that has fallen or flowed down on the slope 3a collides with the intrusion factor receiving part 11, a load is generated on the first member 18 of the detection unit 12 to which the pole support part 15 of the intrusion factor receiving part 11 is fixed.

[0075] Due to the load received by the first member 18, as shown in FIG. 9, the relatively fragile connecting cylinder 27 that connects the first member 18 and the second member 30 is deformed (broken), and the relative posture and / or position of the first member 18 and the second member 30 is displaced. As a result, the contact between the switches 26a, 26b of the intrusion factor intrusion detection unit 24 fixed in the lower recess 21 of the first member 18 and the protrusions 32a, 32b provided on the upper surface of the second member 30 is disengaged, and the pressing on the switches 26a, 26b is released.

[0076] When the pressing on the switches 26a, 26b is released, the switches 26a, 26b return from the pressed position to the initial position, that is, the pre-elastic deformation state of the coil spring 50d is released, and the coil spring 50d returns from the elastic deformation state. At the same time, the magnet 50c swings between the first swing position and the second swing position, the poles in contact with the ends 50b3, 50b4 of the iron core 50b are switched, and the direction of the magnetic flux passing through the iron core 50b passing through the center of the coil 50a changes, so that an electromotive force of about 200 μJ is generated using Faraday's law of electromagnetic induction.

[0077] The generated electromotive force is converted into a stable DC supply voltage to drive the wireless transmission control unit 51, and the unique identification ID information assigned to each disaster detection unit 24 is wirelessly transmitted to the outside via an antenna (not shown). The wireless communication distance is set to about several meters to several kilometers.

[0078] The ID information wirelessly transmitted from the intrusion factor detection device 10 is received by the on-site receiving device 53 through the relay communication control 53a and then wirelessly transmitted externally via an antenna (not shown). The on-site receiving device 53 can sequentially receive ID information from a plurality of intrusion factor detection devices 10 within a wireless communication-enabled area. When a large-scale debris flow or the like occurs over a wide area, the on-site receiving device 53 sequentially receives ID information from a plurality of intrusion factor detection devices 10.

[0079] The ID information wirelessly transmitted from the on-site receiving device 53 is received by the receiving unit 55c of the monitoring device 55 through an antenna (not shown), stored in the storage unit 55b, and based on this information, the occurrence fact of the disaster is displayed on the notification unit 55d such as a display so that it can be visually recognized, thereby notifying the occurrence of a disaster such as a landslide.

[0080] In the present embodiment, the intrusion factor receiving unit 11, the detection unit 12, and the fixing unit 13 that constitute the intrusion factor detection device 10 are each unitized. The intrusion factor receiving unit 11 and the detection unit 12 are detachably connected by a first connection structure with a screwing structure of a male screw portion 17 and a female screw portion 22, and the detection unit 12 and the fixing unit 13 are detachably connected by a second connection structure with a screwing structure of a female screw portion 34 and a male screw portion 41. Therefore, for example, when it becomes necessary to replace any unit due to the collision or aging deterioration of the intrusion factor M, only the unit that needs to be replaced can be easily replaced.

[0081] Also, by preparing a plurality of each unit (intrusion factor receiving unit, detection unit, fixing unit) in advance according to the installation location, the type of intrusion factor to be detected, etc., they can be appropriately combined and used. Examples of variations of each unit are shown below. <Examples of variations of the fixing unit> The fixing unit 13 of the first embodiment is configured to include four fixing rods 43 on the detection unit fixing plate 40, but it may be configured with one fixing rod.

[0082] As shown in FIG. 10(a), the fixing part 130A is formed with a male screw part 132 that screws into the female screw part 34 on the lower surface of the second member 30 of the detection unit 12 at the upper end of a fixing bar 131A which is a so-called deformed reinforcing bar with concavo-convex protrusions formed on its outer peripheral surface. The fixing bar 131A can have a larger diameter and a longer length compared to the size of the above-described fixing bar 43. Thereby, it is possible to maintain rigidity and maintain fixability.

[0083] Also, as shown in FIG. 10(b), the fixing part 130B has a fixing bar 131B having a fixing portion 133 formed like a so-called deformed reinforcing bar with concavo-convex protrusions formed on its outer peripheral surface on the base end side (upper side), and on the tip end side (lower side), it has a piercing portion 134 having a shape like a sharp pile with a smooth outer peripheral surface and an inverted conical tip so that it can be directly pierced into the soil. <Variation examples of the intrusion factor receiving part> The intrusion factor receiving part 11 of the present embodiment is configured such that the pole part 14 is fitted into the pole support part 15, but these may be integrally configured.

[0084] As shown in FIG. 11, the intrusion factor receiving part 110 is composed of a pole part 111 having a solid cylindrical shape, and at the lower end, a male screw part 112 that screws into the female screw part 22 on the upper surface of the first member 18 of the above-described detection unit 12 is formed.

[0085] Also, as shown in FIG. 12, a fence 114 or a beam 113 (protective member) may be provided between adjacent pole portions 14 and pole portions to prevent the intrusion factor M from slipping through between the pole portions 14. The arrangement interval can be widened, and the installation quantity can be suppressed. Note that the fence 114 can be formed of, for example, a wire mesh. Also, the beam can be formed of a metal plate, a metal bar, reinforced plastic, wood, or the like. Further, the attachment of the protective member (such as the fence 114 and the beam 113) to the intrusion factor receiving portion 11 can be performed by providing a winding portion that enables winding around the pole portion 14 at both ends of the fence or the beam, providing a knotting string that enables knotting to the pole portion 14, or providing a clip portion or a clamp portion that sandwiches the pole portion 14. In addition to the pole portion 14, the fence 114 and the beam 113 also constitute the intrusion factor receiving portion.

[0086] Also, for example, the first member 18 may be configured to be connected to a rockfall protection net or a wire, and when a tension acts on the connected rockfall protection net or wire for some reason, an external force acts on the first member 18 and relative displacement occurs with respect to the second member 30. In this case, the rockfall protection net or the wire constitutes the intrusion factor receiving portion.

[0087] As described above, the intrusion factor detection device 10 according to the present invention has the following effects.

[0088] The detection of a rockfall is performed by using the electromotive force from the electromagnetic induction type electromotive force generation portion 50 of the detection unit 12 due to the collision of the rockfall, so a power source is not required, there is no need to have a battery, and naturally, there is no need to replace the battery. Needless to say, the magnetic force of the magnet 50c can be strengthened, or the number of turns or the wire diameter of the coil 50a can be devised to improve the electromotive force.

[0089] The intrusion factor receiving part 11, the detection unit 12, and the fixing part 13 are each unitized. The intrusion factor receiving part 11 and the detection unit 12 are detachably connected by a first connection structure formed by a screwing structure between a male screw part 17 and a female screw part 22. The detection unit 12 and the fixing part 13 are configured to be detachably connected by a second connection structure formed by a screwing structure between a female screw part 34 and a male screw part 41. Thus, for example, when it becomes necessary to replace any unit due to a collision of the intrusion factor M, aging deterioration, etc., the undamaged units can continue to be used, and only the units that need to be replaced can be easily replaced.

[0090] Also, as described above, since no power supply is required and each unit is divided, it can be easily installed.

[0091] In addition to the above-described variations, various variations of each unit (intrusion factor receiving part, detection unit, fixing part) are prepared in advance according to the installation location, the type of intrusion factor to be detected, etc., so that they can be optimally combined and used according to the installation conditions and detection targets. And by adopting a configuration that can be optimized for the detection target, it is possible to prevent overlooking or false detection of the detection target. <Second Embodiment> The second embodiment will be described with reference to FIG. 13.

[0092] In the second embodiment, the connection configuration between the first member and the second member of the detection unit is different. That is, in the first embodiment, the first member and the second member are connected by a relatively weak connecting cylinder, while in the second embodiment, the first member and the second member are connected by pins. In the drawings, the same reference numerals are given to the configurations substantially the same as those in the first embodiment, and detailed descriptions thereof are omitted.

[0093] The detection unit 120 according to the second embodiment includes a first member 121 and a second member 126, which are connected by relatively weak connecting pins 129a and 129b.

[0094] The first member 121 has protrusions 122 (122a1, 122a2, 122b1, 122b2) protruding from the lower surface formed at the four corners of the lower surface. Further, the second member 126 has recesses 127 (127a1, 127a2, 127b1, 127b2) formed at the four corners corresponding to the protrusions 122 of the first member 121, and a support piece 128a located between the recesses 127a1, 127a2 located near one of the pair of opposing sides, and a support piece 128b located between the opposing recesses 127b1, 127b2 are formed.

[0095] When the first member 121 and the second member 126 are combined, the support piece 128a of the second member 126 is located between the protrusions 122a1, 122a2 on one side of the first member 121, and the relatively weak connecting pin 129a is pierced through the protrusion 122a1, the support piece 128a, and the protrusion 122a2. The support piece 128b of the second member 126 is located between the protrusions 122b1, 122b2 on the other side of the first member 121, and the relatively weak connecting pin 129b is pierced through the protrusion 122b1, the support piece 128b, and the protrusion 122b2, thereby connecting the first member 121 and the second member 126.

[0096] By having such a configuration, when an impact is applied to the detection unit 120, the relatively weak connecting pins 129a and / or 129b are damaged, and the two members are displaced relative to each other. Thus, similar to the first embodiment, the contact between the switches 26a, 26b of the intrusion factor intrusion detection unit 24 and the protrusions 32a, 32b provided on the upper surface of the second member 126 is disengaged, and the pressing on the switches 26a, 26b is released, thereby wirelessly transmitting the ID information to the outside.

[0097] Also, when one of the relatively weak connecting pins 129a and 129b is damaged, with the undamaged relatively weak connecting pin as an axis, the first member 121 falls onto the second member 126, and the pressing on one of the switches 26a, 26b is released, thereby wirelessly transmitting the ID information to the outside. Of course, the pin needs to be damaged in at least one of them to send a signal, but it may also be configured to send a signal when both are damaged.

[0098] Here, the relatively weak connection pins 129a and 129b constitute a relatively weak connection mechanism. The relatively weak connection pins 129a and 129b are formed of a material that is weaker than the first member and the second member, and may be formed so as to be deformed and / or damaged by the application of an external force to the first member due to the impact of the intrusion factor M on the intrusion factor receiving portion 11. By adjusting the vulnerability (rigidity) by selecting the material of the relatively weak connection pins 129a and 129b and changing the shape (thickness, etc.), it is possible to appropriately change the ease of deformation (ease of damage) of the relatively weak connection pins 129a and 129b according to the object to be detected. The relatively weak connection pin may be in the form of a vertical bolt, or a spring member may be interposed. <Third Embodiment> The third embodiment will be described with reference to FIGS. 14 and 15.

[0099] The third embodiment is configured such that, for example, after installing the intrusion factor detection device at a predetermined position beside the road, it is possible to easily check whether the detection function of the intrusion factor intrusion detection unit 24 operates normally. In the drawings, the same reference numerals are given to the configurations substantially the same as those in the first embodiment, and detailed descriptions thereof are omitted.

[0100] In the detection unit 220 according to the third embodiment, the first member 221 and the second member 230 are connected by a relatively weak connection cylinder 227 so as to be separable.

[0101] The first member 221 is different from the first member in the first embodiment in that the width in the axial direction in which the first member side relatively weak connection cylinder fitting portion 222 formed below the outer peripheral surface engages with the upper concave portion 20 of the intrusion factor receiving portion 11 extending is formed wider than that of the first member in the first embodiment, and groove portions 222a extending in the width direction are formed on each of the four surfaces constituting the outer peripheral surface of the first member side relatively weak connection cylinder fitting portion 222.

[0102] The second member 230 is different from the second member in the first embodiment in that concave portions 231a are formed on each of the four surfaces constituting the outer periphery of the second member side relatively weak connection cylinder fitting portion 231 formed above the outer peripheral surface.

[0103] The ratio fragile connection cylinder 227 is formed with a wider axial width of the intrusion factor receiving part 11 than that of the ratio fragile connection cylinder in the first embodiment. At positions corresponding to the groove parts 222a of the first member side ratio fragile connection cylinder fitting parts 222 on the upper sides of the four inner peripheral surfaces of the ratio fragile connection cylinder 227, upper convex parts 228 that enter the groove parts 222a are formed. On the lower sides of the four inner peripheral surfaces of the ratio fragile connection cylinder 227, lower convex parts 229 that enter and fit into the recessed parts 231a of the second member side ratio fragile connection cylinder fitting parts 231 of the second member 230 are formed at positions corresponding to the recessed parts 231a, which is different from the ratio fragile connection cylinder in the first embodiment. The upper convex parts 228 and the lower convex parts 229 are formed by drawing, but the forming method is not limited to this.

[0104] Next, the operation of the third embodiment will be described with reference to the schematic diagram of FIG. 15. FIG. 15(a) is a partial cross-sectional view showing the state at the time of installation (initial state), and FIG. 15(b) is a partial cross-sectional view showing the state at the time of checking the detection function.

[0105] When the ratio fragile connection cylinder 227 is placed over and pushed into the second member side ratio fragile connection cylinder fitting part 231 of the second member 230, the lower convex part 229 of the ratio fragile connection cylinder 227 and the second member side ratio fragile connection cylinder fitting part 231 are press-fitted while being in pressure contact. When the ratio fragile connection cylinder 227 engages with the stepped part of the second member side ratio fragile connection cylinder fitting part 231, as shown in FIG. 15(a), the lower convex part 229 on the inner circumference of the ratio fragile connection cylinder 227 fits into the recessed part 231a of the second member side ratio fragile connection cylinder fitting part 231 of the second member 230. Thereby, the ratio fragile connection cylinder 227 and the second member 230 are fixed so that the ratio fragile connection cylinder 227 cannot be easily pulled out even if an attempt is made to pull it out from the second member 230. The groove part 222a of the first member 221 and the lower convex part 229 of the ratio fragile connection cylinder 227 fixed to the second member 230 constitute a slide mechanism.

[0106] Next, when the first member side relatively weak connection cylinder fitting portion 222 of the first member 221 is inserted into and pushed into the relatively weak connection cylinder 227, the first member side relatively weak connection cylinder fitting portion 222 and the upper convex portion 228 of the relatively weak connection cylinder 227 are press-fitted while being in pressure contact, introduced into the groove portion 222a, and the upper convex portion 228 slides within the groove portion 222a. When the stepped portion of the first member side relatively weak connection cylinder fitting portion 222 engages with the relatively weak connection cylinder 227, as shown in FIG. 15(a), the upper convex portion 228 on the inner circumference of the relatively weak connection cylinder 227 is located above the groove portion 222a of the second member side relatively weak connection cylinder fitting portion 222 of the first member 221.

[0107] The state shown in FIG. 15(a) in this way is the initial state, and the switch 26a of the intrusion factor intrusion detection unit 24 is in contact with the protrusion 32a and is pressed upward. In this state, the intrusion factor detection device is installed, for example, at a desired position beside the road.

[0108] When checking the detection function, as shown in FIG. 15(b), for example, by lifting the intrusion factor receiving portion 11 (not shown) upward, the first member 221 is lifted with respect to the second member 230, and the first member 221 is displaced in a direction away from the second member 230. As a result, when the switch 26a of the intrusion factor intrusion detection unit 24 returns to the initial position, an electromotive force is generated and ID information is wirelessly transmitted to the outside via an antenna (not shown). At this time, if the intrusion factor intrusion detection unit 24 is abnormal, the ID information will not be wirelessly transmitted to the outside, so the abnormality of the intrusion factor intrusion detection unit 24 can be checked. The lifted first member 221 is such that the lower part of its groove portion 222a is caught by the upper convex portion 228 of the relatively weak connection cylinder 227, so the engagement between the first member 221 and the relatively weak connection cylinder 227 is maintained without being disengaged. After the check is completed, the first member 221 is returned from the lifted state to the original initial state (FIG. 15(a)), and the protrusion 32a is again brought into contact with the switch 26a and pressed upward. <Modification of the Third Embodiment> Modification 1 of the third embodiment is shown in FIG. 16, and modification 2 is shown in FIG. 17.

[0109] In both Modifications 1 and 2, since the first member and the second member are biased in the direction of approaching each other by the elastic force of the spring member, when checking, after separating the first member and the second member against the biasing force, they are configured to automatically return to the original state by the elastic force of the spring member. In the drawings, components having substantially the same configuration as those of the third embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0110] First, in Modification 1, a tension spring is used as the spring member. Specifically, as shown in FIG. 16, the first member 221A is provided with engaging pins 223a (223b: not shown) protruding from two opposing surfaces of the outer peripheral surface, and the second member 230A is provided with engaging pins 232a (232b: not shown) protruding from two opposing surfaces of the outer peripheral surface.

[0111] The tension springs 240a (240b) are coil springs having two hooks 240a1 (240b1), 240a2 (240b2) at both ends. One hook 240a1 (240b1) is hooked on the engaging pin 223a (223b) of the first member 221A, and the other hook 240a2 (240b2) is hooked on the engaging pin 232a (232b) of the second member 230A. The tension springs 240a (240b) are set to have a free length such that a biasing force is generated when the first member 221A, the relatively fragile connecting cylinder 227, and the second member 230A are assembled and the hooks are hooked on the respective engaging pins. Also, the length at the allowable load is set to be relatively displaceable at least to a position where, as shown in FIG. 15(b), the first member 221A is separated from the second member 230A and the pressing of the switch 26a (26b) by the protrusions 32a (32b) is released.

[0112] With the above configuration, the first member 221A is directly or indirectly lifted against the biasing force of the tension springs 240a (240b) with respect to the second member 230A to check for abnormalities in the intrusion factor detection unit 24. After releasing the lifting, the first member 221A returns to its original position by the elastic force of the tension springs 240a (240b).

[0113] Next, a second modification of the third embodiment will be described with reference to FIG. 17.

[0114] In the second modification, a compression spring is used as the spring member. Specifically, it includes a spring retainer 260 that presses the compression spring 250 against the first member 221B. The first member 221B has a circular convex shape 224 with a diameter smaller than the inner diameter of the compression spring 250 so as to surround the periphery of the opening of the upper recess 20, preventing the compression spring 250 from shifting. The inner diameter of the compression spring 250 is set to be larger than the outer periphery of the intrusion factor receiving portion 11 (not shown), so as not to prevent the installation of the intrusion factor receiving portion 11 on the first member 221B. The outer diameter of the compression spring 250 is set to be smaller than the upper surface outer shape of the first member 221B.

[0115] The spring retainer 260 has a pressing head 261 and connecting legs 262. The pressing head 261 has a shape with an open lower surface of a hollow rectangular parallelepiped, and is formed to be slightly larger than the outer shape of the first member 221B so that at least the upper part of the first member 221B can be inserted from the lower surface side, and has a circular opening 263 on the upper surface. The inner diameter of the opening 263 is set to a size that allows the intrusion factor receiving portion 11 to pass through, so as not to prevent the installation of the intrusion factor receiving portion 11 on the first member 221B. A circular convex shape 264 is formed to surround the periphery of the lower surface side of the opening 263, preventing the compression spring 250 from shifting.

[0116] The connecting legs 262 are formed by a pair of long and thin plates extending downward from two opposing surfaces of the outer peripheral surface of the compression spring retainer 260. Through holes 262a and 262b are respectively formed below the pair of connecting legs 262 and 262, and fixing screws 265 and 265 are inserted through the through holes 262a and 262b from the outside and screwed into female threads formed on protruding cylindrical fixing bosses 233a and 233b on two opposing surfaces of the outer peripheral surface of the second member 230B, respectively.

[0117] By configuring as described above, the first member 221B is directly or indirectly lifted with respect to the second member 230B against the biasing force of the compression spring 250 to check for abnormalities in the intrusion factor intrusion detection unit 24, and then the lifting is released, so that the first member 221B returns to its original position by the elastic force of the compression spring 250.

[0118] In addition, in the third embodiment, even when the first member 221B is lifted (separated) with respect to the second member 230B, since the ratio-vulnerable connecting cylinder is configured to cover between the first member and the second member, it is possible to prevent foreign matter from entering the intrusion factor intrusion detection unit 24 during the check.

[0119] All the intrusion factor detection devices described above are configured such that the intrusion factor receiving part is erected so as to extend in a substantially vertical direction. However, for example, as shown in FIGS. 18(a) and (b), it may be configured to extend in a substantially horizontal direction.

[0120] The intrusion factor detection device shown in FIG. 18(a) has a fixing part having an L-shaped connector part 140, the detection unit 12 can be connected to the fixing rod 130 at an angle of approximately 90°, and the intrusion factor receiving part 115 is configured to extend substantially horizontally.

[0121] The intrusion factor detection device shown in FIG. 18(b) is configured such that the pole part of the intrusion factor receiving part 117 is bent at 90° near the connection part with the detection unit 12 and extends substantially horizontally.

[0122] Note that another detection unit 12 may be configured to be connected to the tips of the intrusion factor receiving parts 115 and 117 that extend substantially horizontally, or it may be configured as a free end without connecting anything.

[0123] As described above, since the intrusion factor receiving part is configured to extend in the horizontal direction, it is possible to surely detect sliding and peeling type falling rocks and the like.

[0124] The components of the first embodiment, its modifications, the second embodiment, its modifications, the third embodiment, and its modifications described above can be implemented in combination with each other as long as there is no contradiction, and various changes can be made without departing from the gist of the present invention. Further, the fixing mechanism is not limited to the material or the shape of the member.

[0125] Both metals and non-metals can be applied to the material of the member. Metals include ferrous metals and non-ferrous metals. Ferrous metals include steel (carbon content < 0.02%), cast iron (carbon content > 2.14%), etc. Steel includes ordinary steels such as hot-rolled steel for general structure (SS), hot-rolled steel for welded structure (SM), cold-rolled steel sheet (SPCC), and special steels such as alloy steel for mechanical structure, tool steel, and special-purpose steel. Alloy carbon steel for mechanical structure includes alloy steels such as chromium steel (SCr), nickel-chromium steel (SNC), etc. Tool steel includes carbon tool steel (SK), alloy tool steel (SKD), high-speed tool steel (SKH), and special-purpose steel includes low-alloy spring steel (SUP), bearing steel (SUJ), free-cutting steel (SUM), high-alloy stainless steel (SUS), heat-resistant steel (SUH), and high-manganese steel. Cast iron includes gray cast iron (FC), ductile cast iron (FCD). Non-ferrous metals include light metals such as aluminum, magnesium, sodium, potassium, calcium, lithium, titanium, base metals such as copper, tin, zinc, lead, rare metals such as nickel, chromium, manganese, molybdenum, tungsten, bismuth, cadmium, cobalt, rare earths such as cerium, neodymium, praseodymium, precious metals such as gold, silver, platinum, radioactive metals such as uranium, plutonium, etc., and alloys containing these as components are also included.

[0126] Non-metals include wood, plastic, paper, fire-retardant treated wood, plywood, glass, ceramic, pottery, porcelain, rubber, natural resin, synthetic resin, concrete, asphalt, etc., and composite materials thereof are also included.

[0127] The wood includes camellia, camphor tree, Japanese cypress, fir, pine, other evergreen trees, maple, cherry, larch, beech, birch and other deciduous trees. In addition to these, it also includes plywood, laminated wood, resin composite materials, and wood with special specifications that have been subjected to resin reinforcement or flame retardant treatment, etc.

[0128] Plastics (synthetic resins) include thermosetting resins such as phenol resin (PF), epoxy resin (EP), melamine resin (MF), urea resin (urea resin, UF), unsaturated polyester resin (UP), alkyd resin, polyurethane (PUR), thermosetting polyimide (PI), etc.; thermoplastic resins (general-purpose plastics) such as polyethylene (PE), high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene chloride, polystyrene (PS), polyvinyl acetate (PVAc), polyurethane (PUR), Teflon (registered trademark) (polytetrafluoroethylene, PTFE), ABS resin (acrylonitrile-butadiene-styrene resin), AS resin, acrylic resin (PMMA), etc.; various nylons, i.e., polyamides (PA), polyacetal (POM), polycarbonate (PC), modified polyphenylene ether (m-PPE, modified PPE, PPO), polyethylene terephthalate (PET), glass fiber-reinforced polyethylene terephthalate (GF-PET), polybutylene terephthalate (PBT)-containing polyesters, thermoplastic resins (engineering plastics) such as cyclic polyolefin (COP), etc.; thermoplastic resins (super engineering plastics) such as polyphenylene sulfide (PPS), polysulfone (PSF), polyethersulfone (PES) (Polyethersulfone), amorphous polyarylate (PAR), liquid crystal polymer (LCP), polyetheretherketone (PEEK), thermoplastic polyimide (PI), polyamideimide (PAI) (Polyamide-imide), etc., and also include polymer alloys which are composites of these, and also include bioabsorbable polymers such as trimethylene carbonate (TMC), polyglycolic acid (PGA), polylactic acid (PLA), and poly-L-lactic acid (PLLA), poly-DL-lactic acid (PDLLA), etc., and also include so-called FRP formed by mixing reinforcing materials such as glass fiber, carbon fiber, silicon fiber, aramid fiber, metal fiber, and various reinforcing materials.

[0129] The paper includes those made from raw materials of non-wood plants such as asa, casuarina, ganpi, kozo, mayumi, mitsumata, bamboo, straw (rice straw, wheat straw), flax, cotton, sugarcane bagasse, Manila hemp, kenaf, banana, oil palm, and other non-wood plant paper raw materials, as well as those made from broad-leaved trees, coniferous trees, wood chips, waste paper, recycled paper, and other wood paper raw materials, including papers with special specifications subjected to resin strengthening or flame retardant treatment.

[0130] The flame retardant materials include flame retardant treated wood, flame retardant plywood, flame retardant fiberboard, and flame retardant plastic board. The plywood includes structural plywood, plywood for concrete formwork (compane), ordinary plywood, flame retardant plywood, decorative plywood, and curved plywood.

[0131] The glass includes soda-lime glass, potash glass, crystal glass, quartz glass, polarized glass, multilayer glass (eco glass), tempered glass, laminated glass, heat-resistant glass - borosilicate glass, bulletproof glass, glass fiber, so-called photocatalytic cleaning glass formed by providing a titanium oxide layer on the surface or forming an extremely fine uneven structure, water glass, uranium glass, acrylic glass, dichroic, goldstone - aventurine - sunstone - amethyst, glass ceramics, low melting point glass, metallic glass, sapphirette, phase-separated glass, porous glass, liquid glass or fluid glass, hybrid glass, organic glass, and lead glass.

[0132] The ceramics include elemental ceramics such as oxide-based, hydroxide-based, carbide-based, carbonate-based, nitride-based, halide-based, phosphate-based, etc., barium titanate, high-temperature superconducting ceramics, boron nitride, ferrite, lead zirconate titanate, aluminum oxide, silicon carbide, silicon nitride, steatite, zinc oxide, zirconia, and other fine ceramics.

[0133] The porcelain includes earthenware, stoneware (e.g., semi-porcelain, sintered), pottery, and porcelain.

[0134] Synthetic rubbers include R groups (excluding natural rubber) such as butadiene rubber (BR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), nitrile rubber (NBR), polyisobutylene (butyl rubber IIR), etc., M groups such as ethylene-propylene rubber (EPM, EPDM), chlorosulfonated polyethylene (CSM), acrylic rubber (ACM), fluororubber (FKM), etc., O groups such as epichlorohydrin rubber (CO, ECO), etc., U groups such as urethane rubber (U), etc., and Q groups such as silicone rubber (Q), etc.

[0135] Concretes include ordinary concrete, high-strength concrete, early-strength concrete, shielding concrete, lightweight concrete, greening concrete, watertight concrete, reinforced concrete, etc. Reinforced concrete includes reinforced concrete with steel bars, reinforced concrete with bamboo bars, concrete-filled steel tube structure (CFT), steel fiber reinforced concrete (SFRC), glass fiber reinforced concrete (GFRC, GRC), carbon fiber reinforced concrete (CFRC), and so-called ancient concrete represented by Roman concrete.

[0136] Asphalts include straight asphalt, blown asphalt, asphalt for waterproofing work, modified asphalt for paving, etc.

Explanation of Symbols

[0137] 1 Intrusion factor detection system 10 Intrusion factor detection device 11, 110 Intrusion factor receiving part 12, 120 Detection unit 13, 130 Fixing part 17 Male screw part (first detachable mechanism) 18 First member 22 Female screw part (first detachable mechanism) 24 Intrusion factor intrusion detection part 26a, 26b Switch 27 Specific vulnerability connecting cylinder (specific vulnerability connecting mechanism) 30 Second component 34 Female screw part (second detaching and attaching mechanism) 41 Boss male screw part (second detaching and attaching mechanism) 50 Electromagnetic induction power generation unit 53 On-site receiving device 55 Monitoring device 113 Beam (intrusion factor receiving part) 114 Fence (intrusion factor receiving part) 129a, 129b Ratio-fragile connection pin (ratio-fragile connection mechanism) 222a Groove part (slide mechanism) 229 Lower convex part (slide mechanism) 240a Tension spring (spring member) 250 Compression spring (spring member)

Claims

1. An intrusion factor receiving part that receives an intrusion factor that intrudes into a predetermined area, A fixing part for installing the intrusion factor receiving part within or near the predetermined area, A detection unit that detects that the intrusion factor receiving part has received the intrusion factor, and The detection unit A first member fixed to the intrusion factor receiving part, A second member fixed to the fixing part, A relatively fragile connection mechanism that connects the first member and the second member, An intrusion factor intrusion detection part that generates an electromotive force due to a relative displacement between the first member and the second member, and wirelessly transmits at least unique ID information to the outside using the electromotive force, An intrusion factor detection device, characterized by comprising the above.

2. The intrusion factor intrusion detection part of the intrusion factor detection device according to claim 1, wherein the electromotive force is generated by electromagnetic induction.

3. The intrusion factor intrusion detection part of the intrusion factor detection device according to claim 2, wherein the first member and the second member are relatively displaced, and the direction of the magnetic flux of the iron core passing through the coil changes to generate an electromotive force.

4. The intrusion factor intrusion detection part has an elastically deformable member. When the first member and the second member are relatively displaced, the elastically deformable member returns from the elastically deformed state, so that the poles of the magnet in contact with the iron core are forcibly switched, and the direction of the magnetic flux of the iron core passing through the coil changes to generate an electromotive force. The intrusion factor detection device according to claim 3, characterized by this.

5. The relatively fragile connection mechanism of the intrusion factor detection device according to claim 1 has a cylindrical member formed in a cylindrical shape, and is connected so as to surround the first member and the second member.

6. The relatively fragile connection mechanism of the intrusion factor detection device according to claim 5 is characterized in that the first member and the second member are connected via a sliding mechanism.

7. The first member and the second member of the intrusion factor detection device according to claim 6 are biased in a direction in which the first member and the second member approach each other by the elastic force of a spring member.

8. The intrusion factor detection device according to claim 1, wherein the intrusion factor receiving part and the first member are connected via a first detachment mechanism.

9. The intrusion factor receiving part is a single tube, and the detachment mechanism has a boss part that fits into the end of the single tube on one side, and a screw part that is screwed into the first member on the other side. The intrusion factor detection device according to claim 8, characterized by this.

10. The intrusion factor detection device according to claim 1, wherein the fixing part and the second member are connected via a second detachable mechanism.

11. The intrusion factor receiving part includes any one of a pole part, a fence, a beam, a rockfall protection net, and a wire. The intrusion factor detection device is characterized by this.

12. An intrusion factor detection system, comprising a plurality of the intrusion factor detection devices according to claim 1, receiving signals from the plurality of intrusion factor detection devices, and a monitoring device for displaying information based on the received signals.

13. The intrusion factor detection system according to claim 12, further comprising a relay device between the plurality of intrusion factor detection devices and the monitoring device, wherein the relay device is wirelessly connected to the plurality of intrusion factor detection devices and wirelessly connected to the monitoring device.

14. The intrusion factor detection system according to claim 12, wherein the plurality of intrusion factor detection devices include a fence, a beam, a rockfall protection net, or a wire installed between adjacent intrusion factor detection devices.

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