JP2002228497A - Falling rock guard net warning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a falling rock guard net warning device capable of monitoring the state of a face of slope at a low cost without requiring a detection line. SOLUTION: An IC tag having a displacement sensor built therein and performing the radio transmission of measured displacement data is set on a falling rock guard net or on a rock of a face of slope, and an IC tag reader receiving the displacement data of the IC tag is provided. A wireless installation or a portable telephone is connected to the IC tag reader through a control unit for judging a displacement level to enable the transmission of the displacement data to a remote region. A solar cell and a battery may be used as the power supply of a system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of rock fall protection nets stretched on slopes and slopes along roads, etc.
In particular, the present invention relates to the provision of a device which, when a rock fall protection net is damaged, detects the damage and issues an alarm.

[0002]

2. Description of the Related Art FIG. 3 shows a slope provided with a rock fall protection net. On the slope of the hillside, a net 3 is stretched along the slope 2 where there is a rock 1 that is likely to fall down or there is a risk of landslides.
The horizontal rope group 5 is arranged at right and left and up and down intervals, and the intersection of the vertical and horizontal rope group 5 is fixed to the slope 2 together with the net 3 by a binding anchor. Reference numeral 4 denotes an anchor for fixing both ends of the vertical / horizontal rope group 5 to the slope 2.

[0003] In order to detect when the rock fall protection net provided as described above is deformed or damaged, conventionally, as shown in FIG. Is connected to the alarm device 7. If the net is damaged by falling rocks while the voltage is applied to the detection line 6, the detection line 6 is also damaged and cut off, and the voltage of the detection line 6 becomes zero. As described above, when the voltage of the detection line becomes zero, the alarm device 7 is activated, and a warning is issued to the management room by the wireless device of the alarm device 7.

FIG. 5 shows another conventional example of a rock fall protection net alarm device, in which a load cell 8 is connected to a detection line 6 (or a group of vertical and horizontal ropes), and this load cell 8 is connected to an alarm device 9. Things. This device has a detection line 6
The load of the vertical (horizontal and horizontal rope group) is measured by the load cell 8, and when the load exceeds a set value, the alarm device 7 is operated to send an alarm to the management room.

[0005]

According to the above-described prior art rock fall protection net alarm device of FIG. 4, since the detection line 6 is covered so as to be able to detect anywhere in a wide range of the net 3, the detection line 6 can be used. There is a problem that it is necessary to install a large number of them, which increases costs. In the case of the rock fall protection net alarm device shown in FIG. 5, the same problem as the above-mentioned device is also encountered. Even when the load cells 8 are attached to the vertical and horizontal rope groups, the load cells 8 are provided at various places in the vertical and horizontal rope groups. Therefore, it is the same as the above-described detection line that a large number of load cells need to be installed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has as its object; an object of the present invention is to provide a rock fall rock which can monitor the state of a slope at low cost without requiring a detection line. An object of the present invention is to provide a protective net alarm device.

[0007]

According to the present invention, there is provided a rock fall protection net alarm device which includes a displacement sensor and an IC tag which transmits a measured displacement data by radio and is set on a rock fall protection net or a rock on a slope. And an IC tag reader for receiving the displacement data.

[0008] By connecting a wireless device or a mobile phone to the IC tag reader via a control unit for judging a displacement level, the displacement data can be transmitted to a remote place.

It is preferable to use a solar cell and a battery as a power source of the system.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. FIG. 1 shows a preferred embodiment of a rock fall protection net alarm device.

As shown in the drawing, the rock fall protection net warning device of this embodiment has a net 3 on a slope 2 including a rock 1 that is likely to fall and a landslide and a vertical and horizontal rope group. 5 is fixed, anchors 4 at the left and right and upper and lower ends of the vertical / horizontal rope group 5, and the intersection of the vertical / horizontal rope group 5 is fixed together with the net 3 to the slope 2 by the binding anchor. , Net 3 and vertical / horizontal rope group 5
, A set of several IC tags 9 with a built-in displacement sensor and capable of wirelessly transmitting measured displacement data; one IC tag reader 10 receiving the displacement data on the monitoring side, and judging the displacement level A system is constructed with a control unit 11 that performs a warning and a wireless device or a mobile phone 12 that issues a warning, and these systems are configured to supply power with a solar cell and a battery 13.

According to the rock fall protection net warning device having such a configuration, the displacement of the net 7 and the vertical and horizontal rope groups 5 is continuously received by one IC tag reader 10 and connected to the IC tag reader 10. The control unit 11 determines whether the displacement exceeds a set value. If the displacement value exceeds the set value, the remote unit or the mobile phone 12 connected to the control unit 11 manages the remote location. Send a warning to the room.

As described above, according to the rock fall protection net warning device of this embodiment, it is possible to monitor the state change of the slope 2 in time series, and it is possible to predict a rock fall or a landslide. In addition, installation of several IC tags to rock fall protection net and change of slope condition with only one receiving IC tag reader; displacement can be measured, so construction is much cheaper than conventional rock fall protection net alarm system. Costs and construction costs can be kept low. Further, as described above,
A few IC tags and one I
Since a C tag reader can be used, the system can be constructed at a low cost.

FIG. 2 shows another embodiment of the rock fall protection net warning device according to the present invention. The same functional portions as those in FIG. 1 are denoted by the same reference numerals as those in FIG. See also the description of FIG. In this embodiment, the IC
This is a system in which the tag 9 is directly mounted on the rock 1 at the risk of falling rocks, and changes in the state of the rock are monitored. According to this embodiment, the same effects as those of the above-described embodiment; FIG. 1 can be obtained.

[0015]

As described above, according to the present invention, it is an object of the present invention to provide a rock fall protection net alarm device capable of monitoring the state of a slope at low cost without requiring a detection line; Can be achieved, and the effect can be said to be large.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a rock fall protection net warning device according to the present invention, wherein (a) is a front view, and (b) is a cross-sectional view.

FIG. 2 is an explanatory sectional view showing another embodiment of the rock fall protection net warning device according to the present invention.

FIG. 3 shows an example of construction of a rock fall protection net, (a) is an explanatory front view, and (b) is an explanatory sectional view.

FIG. 4 is an explanatory front view showing an example of a conventional rock fall protection net alarm device.

FIG. 5 is an explanatory front view showing another example of the conventional rock fall protection net alarm device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rock 2 Slope 3 Net 4 Anchor 5 Vertical / horizontal rope group 9 IC tag 10 IC tag reader 11 Control part 12 Radio or mobile phone 13 Solar cell and battery

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G08B 21/10 G08B 21/10 F term (Reference) 2D001 PA06 PC03 PD07 PF11 2D044 DB01 EA07 2F076 BB08 BD17 BE18 BE19 5C086 AA14 BA11 CB40 EA08 EA11 EA13 FA20

Claims (3)

[Claims] 1. An IC tag which has a built-in displacement sensor and wirelessly transmits measured displacement data, is set on a rock fall protection net or a rock on a slope, and has an IC tag reader for receiving the displacement data of the IC tag. Rockfall protection net alarm device. 2. A wireless device or a mobile phone is connected to said IC tag reader via a control unit for determining a displacement level.
The rock fall protection net warning device according to claim 1. 3. The rock fall protection net warning device according to claim 1, wherein a solar cell and a battery are used as power sources of the system.