JPH05280978A - Slope displacement measuring system - Google Patents

Abstract

PURPOSE:To obtain data regarding displacement on a slope by providing receiving means placed respectively on a reference point and an observation point for receiving electric waves from a satellite and a displacement calculating means for calculating displacement of a relative position with the reference point and the observation point. CONSTITUTION:GPS receivers 4,4 for receiving electric waves from a GPS satellite 5 as receiving means are placed on a reference point 1 except on a fault part where a landslide may occur on a slope 3 and an observation point 2 provided on an optional part on the slope 3. An analyzer 9 for analyzing slope displacement due to the landslide of the slope 3 or the like based on a distance between the reference point 1 and the observation point 2 and a slope is placed in a site office 7 placed apart from the slope 3. The analyzer 9 calculates three-dimensional position coordinate data of the reference point 1 and the observation point 2 based on received signals of a GPS receiver 42 and calculates difference in relative position coordinates of both points 1,2 to obtain a distance between the reference point 1 and the observation point 2 and also calculates displacement due to the landslide of the slope 3 or the like based on the distance and displacement with change of a wave angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope displacement measuring system used for observing the state of landslide on a slope such as a constructed land.

[0002]

2. Description of the Related Art Conventionally, when observing the state of landslides occurring on a slope such as a constructed land, the measurement using a light-wave rangefinder and the measurement of crustal movements by an extensometer or a subsidence meter are performed. .. For example, in the observation using a light wave range finder, the light wave range finder is set as a reference point at a point that avoids a fault part that may cause landslides on the slope, and an observation point is set at any point on the slope. Then, measure the distance from the reference point to the observation point with a light-wave rangefinder at specified time intervals or days, and make a note of the obtained distance data or store it in storage means such as a pocket-type portable storage device and store it in the field. After returning to the office, the displacement of the slope is calculated by analyzing changes in the distance data brought back by a computer.

When an extensometer or subsidence meter is used, the extensometer or subsidence meter is installed at each place where a sign of landslide is remarkably present, such as a cracked portion on a slope. The measurement results recorded on the recording paper inside are periodically collected to analyze the slope displacement.

[0004]

However, the light-wave rangefinder is used in the case where the observation point cannot be seen through from the light-wave rangefinder due to an obstacle on the line connecting the reference point and the observation point, or when the lightwave cannot be received. In addition, there is a problem that the survey cannot be performed at night, the accuracy is not good in spite of the time and effort required for the survey, and it is insufficient to detect the fine crustal movement. On the other hand, when measuring with an extensometer or subsidence meter, there are often multiple installation locations of the instrument, so a corresponding number of extensometers and subsidence meters are required, which increases the cost for measurement. However, in the case of measurement on a long slope, there is a problem that the cost increase becomes particularly significant.

Further, conventionally, since the collection of the survey data by the light-wave rangefinder and the displacement data of the slope by the extensometer and subsidence device is manually performed, the analysis work performed by using a computer or the like cannot be performed in real time. There was a problem. The present invention has been made in view of the above circumstances, and a slope displacement measurement system capable of obtaining data on slope displacement easily and at low cost regardless of weather conditions and collecting the data in real time. The purpose is to provide.

[0006]

In order to achieve the above object, the present invention is a system for measuring the displacement of the relative position between a reference point and an observation point which are installed separately on a slope. Receiving means installed at each of the reference point and the observation point for receiving radio waves from a satellite, and wireless transmission attached to the receiving means for converting a reception signal received by the receiving means into a radio signal and transmitting the radio signal. Means, a radio receiving means installed at a location apart from the slope, for receiving a radio signal transmitted from the radio transmitting means, and attached to the radio receiving means, and the reference point and the observation based on the received signal. A position coordinate calculating means for calculating the position coordinates of the point; and a displacement calculating means for calculating the displacement of the relative position between the reference point and the observation point based on the position coordinates calculated by the position coordinate calculating means. Features .

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram showing a partial configuration of a slope displacement measuring system according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing an equipment installation situation when performing measurement using the slope displacement measuring system of FIG. It is a figure.

In FIG. 2, reference numeral 5 is a GPS satellite, which orbits the earth along a predetermined orbit. The GPS receiving devices 4 and 4 as receiving means for receiving the radio waves from the GPS satellites 5 have a reference point 1 at a position avoiding a faulty portion on the slope 3 that may cause a landslide, and an arbitrary position on the slope. It is installed at the observation point 2 provided at the location.
As shown in FIG. 1, the GPS receiving device 4 is composed of a GPS antenna 41 and a GPS receiver 42 that receives and processes radio waves from the GPS satellites 5 received by the GPS antenna 41, and is connected to the GPS receiving device 4. The transmission device 6 as the wireless transmission means is a modem 61 for converting a reception signal received and processed by the GPS receiver 42 into a transmission signal for a telephone line, and a portable radio telephone 6 connected to the modem 61.
It consists of 2.

On the other hand, reference numeral 7 in FIG. 2 denotes an on-site office installed away from the slope 3, and the slope displacement due to a landslide or the like on the slope 3 is based on the distance and the slope between the reference point 1 and the observation point 2. An analysis device 9 for analyzing is installed. As shown in FIG. 1, a portable radio telephone 62 is installed in the field office 7.
A portable wireless telephone 81 which is called by the portable wireless telephone 62 and receives a transmission signal transmitted from the portable wireless telephone 62 to the air;
The transmission signal received by this portable radio telephone 81 is GPS
A receiving device 8 as a wireless receiving means, which comprises a modem 82 that converts the original received signal received by the receiver 42 into a received signal.
Is provided, and the analysis device 9 is connected to the modem 82.

The analysis device 9 is composed of, for example, a personal computer or the like, and corresponds to position coordinate calculation means and displacement calculation means, and the GPS receiver 42 of the reference point 1 and the observation point 2 input via the modem 82. 3D position coordinate data of the reference point 1 and the observation point 2 are calculated based on the received signal of the above, and the relative position coordinate difference between the points 1 and 2 is calculated to calculate the difference between the reference point 1 and the observation point 2. The distance and inclination of the slope 3 are calculated, and the displacement of the slope 3 due to landslide or the like is calculated based on the distance and the temporal displacement of the elevation angle.

The GPS receiver 4 at the reference point 1 and the observation point 2
Instructions for turning on and off 2 and outputting the received signal to the modem 61, which are received and processed by the GPS receivers 42 at both points 1 and 2, are output from the analysis device 9 to the modem 82, the portable radio telephone 81, This is performed based on a remote control signal input to the GPS receiver 42 via 62. Further, the displacement of the slope 3 calculated by the analysis device 9 is read by the linkage software stored in the analysis device 9 into the graphic software also stored in the analysis device 9, and the displacement is calculated by the graphic software. It is output in the form of a displacement graphic diagram of the slope 3 created.

In the slope displacement measuring system of the present embodiment thus constructed, the GPS is transmitted via the GPS antenna 41.
The radio waves from the GPS satellites 5 received and processed by the receiver 42 are input to the analyzer 9 in real time via the portable radio telephones 62, 81 and the modem 82.
The displacement of the slope 3 can be calculated in real time and the analysis based on its change over time can be performed in real time. Moreover, the personnel who go to the reference point 1 and the observation point 2 to collect data are not required, so it is troublesome and costly. Can be reduced. Further, since the measurement is performed using the GPS satellites 5 and the GPS receiving device 4, it is possible to perform the survey even in rainy weather or at night without being affected by weather conditions, and the installation location of the GPS receiving device 4 is also a reference point. Since it is only necessary to use two locations, 1 and the observation point 2, the number of installation locations can be reduced and the cost can be reduced as compared with the extensometer and the subsidence meter.

In the present embodiment, the received signal is transmitted to the analysis device 9 side using the telephone line. However, in the case of performing data transmission by general radio, the portable radio telephones 62, 81 are used.
May be omitted.

[0014]

As described above, the slope displacement measuring system of the present invention is used.
According to the stem, the
It is a system that measures the displacement of the relative position with the observation point.
Are installed at each of the reference point and the observation point.
Receiving means for receiving radio waves from stars
Is installed and converts the received signal received by the receiving means into a wireless signal.
The wireless transmission means for converting and transmitting, and the point separated from the slope.
Radio signal transmitted from the wireless transmission means installed at the location.
Wireless receiving means for receiving a signal, and attached to the wireless receiving means
The reference point and the observation point based on the received signal.
Position coordinate calculating means for calculating position coordinates, and the position coordinates
Based on the position coordinates calculated by the calculation means and the reference point
Displacement calculation means that calculates the displacement of the relative position with the observation point
Prepared to be equipped. For this reason, weather conditions such as when it rains or at night
The measurement work can be performed regardless of the situation, and
There are few equipment installation locations on the surface and personnel are required to collect data
Since it does not require, the displacement of the slope can be done easily and at low cost.
Data is available and
Since it is sent to the coordinate calculation means side with a line, you can collect data
Can be done in real time.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing a partial displacement of a slope displacement measuring system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a device installation situation when performing measurement using the slope displacement measurement system of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reference point 2 Observation point 3 Slope 4 GPS receiving device (receiving means) 5 GPS satellite (satellite) 6 Transmitting device (wireless transmitting means) 8 Receiving device (wireless receiving means) 9 Analyzing device (positional coordinate calculating means, displacement calculating means) )

Claims (1)

[Claims] 1. A system for measuring displacement of a relative position between a reference point and an observation point, which are installed separately on a slope, and which is installed at each of the reference point and the observation point, Receiving means for receiving the radio wave, wireless transmission means attached to the receiving means for converting a reception signal received by the receiving means into a wireless signal and transmitting the wireless signal, and the wireless transmission means being installed at a location apart from the slope. A wireless receiving means for receiving a wireless signal sent from a transmitting means; a position coordinate calculating means attached to the wireless receiving means for calculating the position coordinates of the reference point and the observation point based on the received signal; A slope displacement measuring system comprising: a displacement calculating unit that calculates the displacement of the relative position between the reference point and the observation point based on the position coordinates calculated by the coordinate calculating unit.