JPS59183332A - Detecting apparatus for movement of ground - Google Patents

Abstract

PURPOSE:To detect premonitory symptoms of the movement of the ground without fail by a method wherein a plurality of detectors detecting the occurrence of displacement of the ground surface are arranged on the ground surface within a prescribed monitored area, and whether or not the detectors in more than prescribed numbers have detected the displacement within a prescribed period is determined to issue an alarm. CONSTITUTION:Detectors 1-7 are arranged at appropriate intervals within a monitored area and connected to a main apparatus by wireless or wires. The detectors 1-7 are provided with metal balls which are enclosed movably in casing respectively, and the approach of each metal ball is detected three-dimentionally by a proximity sensor. Detection signals of the detectors 1-7 are inputted to state variation descriminating circuits 21-27 and a display unit 28. Output signals of the circuits 21-27 are inputted to a processing circuit 31 formed of a majority circuit, and when any displacement is detected from two state discriminating circuits at least, an alarming circuit 32 is driven. The premonitory symptoms of the movement of the ground can be detected without fail in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ground motion detection device capable of early detecting displacement of the ground surface that is a sign of debris flows, landslides, landslides, etc.

In our country, landslides caused by debris flows, landslides, and starbursts occur in various places every year, resulting in the loss of many lives, property, and facilities in mountainous areas, such as roads and railways. Traditionally, an effective method for detecting the occurrence of such landslides is to place a 60-mm diameter tube at a depth of about 20 to 50 meters.
This is a method that measures the water level, water pressure, and mechanical strain applied to the pipe by installing it vertically in the ground, and using this measurement data to monitor the occurrence of ground vectors. be. However, this conventional method is not only expensive to install,9 but also incurs a heavy economic burden, and is not suitable for monitoring debris flows, landslides, etc.; Since the water level used to determine the degree of risk varies depending on the structure of the ground, slope, soil quality, hardness, tension of tree roots, etc., it is not necessary but easy to create an appropriate ground enclosure. The problem is that it is not.

Therefore, an object of the present invention is to provide a ground motion detection device that can reliably detect signs of occurrence of debris flows, landslides, roof collapses, etc. at an early stage, and can easily install a sensor.

To achieve the above object, the present invention includes a plurality of detectors arranged on the ground surface within a predetermined monitoring area to detect the occurrence of displacement of the ground surface, and responds to output signals from each detector. a first means for determining whether or not a predetermined number or more of the detectors have detected a displacement of the ground surface within a predetermined period; and a second means for generating a predetermined alarm in response to the output from the first means. There is a prefectural priest who has the means. Each detector can be configured, for example, by disposing a plurality of proximity sensors on the wall of a hollow body in which the movable body is enclosed. The output from the proximity sensor of each detector is input to the first means, and the output from the proximity sensor of each detector (based on the state of the It is determined whether or not a change has occurred in the ground surface, and the first means also determines whether or not a predetermined number or more of the detectors have detected a displacement of the ground surface within a predetermined period.

Movable objects include magnetic metals, non-magnetic metals, glass,
) Non-metals such as lath, wood, etc., or fluids such as Yagi, oil, etc. can be used. If these movable bodies are solid, they can move inside the hollow body in response to movement of the surface, inclination, etc. It is preferable that the proximity sensor be spherical so that it can be easily moved.The proximity sensor can be selected from an optimal type of noodle according to the material and dimensions of the movable body to be enclosed in the hollow body. It is desirable that the detection end of the proximity sensor be provided at the same level as the inner wall surface of the hollow body so as not to interfere with the movement of the movable body within the hollow body. In addition, when the wall N of the hollow body is not n,
The proximity sensor may be attached to the outer wall surface of the hollow body.

Hereinafter, based on the illustrated example, the failure E! 1'] will be explained in detail.

FIG. 1 shows an embodiment of a ground motion detection device according to the invention. A ground motion detection device is a ground motion detection device that uses a large number of devices located at appropriate intervals within a monitoring area in order to electrically detect the occurrence of ground surface displacement, νl, movement, inclination, etc. of the ground surface within a required monitoring area. Detectors 1 to 7 are arranged in different locations. These detectors 1 to 7il-L1 are connected to the main unit 8 by wireless or wired connection.The output signals from each detector 1 to 7 are processed in the main unit 8 and sent to the main unit 8.
It is configured to determine whether or not a displacement of the ground surface has occurred within the monitoring area arranged in 7 to 7, and to issue a predetermined alarm if a displacement of the ground surface has occurred. There is.

FIG. 2 shows one of the many detectors shown in FIG.
are shown in detail. Detection glt shown in FIG.
ri, a casing 11 formed as a hollow sphere made of a material such as plastic, and a casing 1
Metal ball 1 that has a piercing school so that it can be moved to confession within 1
2 is fully equipped.

The casing 11K is equipped with a proximity sensor 13 arranged three-dimensionally as shown in the figure, which detects the approach and departure of the metal ball 12 in an omnidirectional manner and outputs an output signal only when the metal ball 12 approaches within a predetermined distance. There is. In the illustrated embodiment, a total of 27 proximity sensors are provided at 45° intervals in the latitude and longitude directions, but the arrangement and number of proximity sensors in each detector can be determined as appropriate. Each proximity sensor 13
The empty outputs 13a are connected to the main device 8, respectively.

The pedestal 15 is fixed to the casing 11, and the legs 14 and 14 are fixed. By burying the pedestal 15 in the ground 16, the detector 1 can be installed at a predetermined location on the ground 1M116. . In addition, each proximity sensor 13 has its detection Ei
13b is attached to the casing 11 so that it is on the same level as the inner wall surface of the gauging 1, and the metal ball 12
Dust is distributed so that the proximity sensor 13 does not impede the movement of the metal ball 12 when the metal ball 12 moves within the gun 7der 11.

Incidentally, if the wall thickness of the casing 11 is thick, the proximity sensor may be attached tightly to the outer wall of the casing 11.

According to such a configuration, when there is no displacement of the ground surface in the area where the detector 1 is disposed, the relative positional relationship between the metal ball 12 and the casing 11 remains unchanged.
The output @ from each proximity sensor 13 has a constant ratio depending on the distance between each proximity sensor and the metal ball. In the illustrated embodiment, the proximity sensor closest to the metal ball 12 is adjusted so that a detection signal is output.

On the other hand, if a displacement occurs on the ground surface for some reason, the relative positional relationship between the casing 11 and the metal ball 12 will change, and therefore the output state of each proximity sensor will change. I especially like it. This change in the 1-h blade shape of the proximity sensor is detected by the in-number processing circuit in the main body 8, as will be described later.

Although only the detector 1 has been described above, the other detectors 2 to 7 have the same configuration.

Figure 3 shows a circuit diagram of the ground motion detection device shown in Figures 1 and 2. 27 output information corresponding to the sensor 9 is output, and these signals are detected by state change judgment (2) paths 21 to 2 provided corresponding to each detector.
7 and is also input to the display device 28. In FIG. 3, only three of the state determining circuits 21 to 27 are shown, and the remaining four are omitted.

Display device 28d, lamp rows 29 to 35 corresponding to 27 proximity sensors provided in each detector are arranged as shown in the figure. Of the 27 lamps forming the rung row, the lamp "corresponding to the proximity sensor closest to the metal bulb" is lit.

Therefore, the monitoring station can know the status of the detectors 1 to 7 from the lighting status of the lamps on the display device 28.

The state change determination circuits 21 to 27 determine whether or not the output state of the proximity sensor Δ etc. in each detector has changed. FIG. 4 shows the state determination circuit 21, which includes a comparison circuit 21c that compares 27 bit registers 21a, 21b and the corresponding outputs from these registers. We are prepared.

The output data of 2 phi tψ from detector 1 is stored in register 2.
1a) is applied to each input of the control circuit 30, and a latch pulse P1 from the control circuit 30 causes 1 to be loaded into the resosc 21a. The registers 21a and 21b are connected as shown in the figure, and are configured such that the contents of the register 21a are transferred to the register 21b by the controller P2 from the control unit 30. Each register 21a, 2ib
The outputs are input to a comparison circuit 21c, and a comparison is made to see if the level states of the corresponding outputs are the same. Latte pulse P 1+ P 2 lff-.

Therefore, when the state of the detector changes and the output state of any of the proximity sensors changes, the Lennon J 21a.

A situation arises in which the respective u1 forces of 21b no longer match.

In response to the occurrence of this mismatch state, the comparison circuit 21c sets the level of its output 121d to the 1-H level.

That is, when the level of each output of the detector 1 does not change, the corresponding level of the blade of each register 21n, 21b is all the same. Therefore, the output line 21 of the comparison circuit 21c
If the level of d is maintained at rLJ or the level state of each output of the detector 1 changes, each register 21a, 21
The corresponding output levels of b all match,
The level of EIJJ21d of the comparison circuit 21c becomes rHJ. As a result, if the detector 1 is displaced for some reason, the level of the output line 21d of the comparison 1 line 21c will change to rl.
(It is possible to detect that displacement of the surface fungus j has occurred.) It is preferable that the ratte pulses P1 and P2 are output alternately at regular time intervals.

The other state change determination circuits 22 to 27 have the same configuration 29, and the latch pulses PH and P2 are commonly applied to each of the state change determination circuits 21 to 27.

Output signals from each of the state discriminating circuits 21 to 27 configured as described above are input to a processing circuit 31 composed of a majority circuit, and signals are sent to the outputs of at least two state discriminating circuits. It is difficult to determine whether or not the level of the signal is simultaneously I”HJ, and if the level of the output signal of two or more state discrimination circuits is “H” at the same time, @r
c drives the alarm circuit 32 and outputs a predetermined alarm such as a rung or a buzzer.

Such a configuration r (wrinkle) can clearly detect the displacement of the ground surface over a wide range, which is a sign of landslides and other landslides, so it is possible to issue accurate forecasts regarding landslides. In addition, even if only one of the detection benefits is activated due to mischief, snow falling from a tree, tree damage, animal collision, etc., no alarm will be output, so the reliability is low. is extremely high.

Of course, it is also possible to process the output coefficients of each detector force by a converter and output a similar alarm.

The detector is not limited to the one shown in the embodiment shown in FIG. 2, and other detectors can be used.

According to the present invention, as described above, it is possible to reliably detect displacement of the ground surface over a wide range that occurs as a sign of landslides and other landslides, so it is possible to accurately predict landslides before they occur. It is highly effective in helping dogs minimize damage caused by landslides.

[Brief explanation of the drawing]

Fig. 1 is a schematic block diagram showing one embodiment of the ground motion measuring device according to the present invention, Fig. 2 is a detailed cross-sectional view of the detector shown in Fig. 1, and Fig. 3 is a diagram of the device shown in Fig. 1. Circuit block diagram, 4th
This figure is a specific circuit diagram of the state change determination circuit shown in FIG. 3. 1 to 7...detector, 8...main device, 11...
Casing, 12... Metal ball, 13... Proximity sensor, 21 to 27, r-state change determination circuit, 31... Processing circuit, 32... Alarm circuit. Patent applicant: Cosmo Eight Co., Ltd.

Claims (1)

[Claims] 1 A plurality of detectors are placed on the ground surface within a predetermined monitoring area to detect the occurrence of displacement of the ground surface, and a predetermined number of detectors on the hook are placed on the ground within a predetermined period of time in response to output signals from each detector. a first means for fully determining whether or not the surface level is detected; and a second means for generating a predetermined alarm in response to the output from the first means.
A ground motion detection device characterized by comprising: