CN112362031B - Inclination angle sensor for landslide measurement and use method thereof - Google Patents

Abstract

The invention discloses an inclination sensor for landslide measurement and a method of using the same. The inclination sensor for landslide measurement comprises a cylindrical shell, the inner cavity of the cylindrical shell is filled with liquid, the cylinder mouth end of the cylindrical shell is connected with a sensor seat, and the sensor seat There is a CCD camera on the top; the method of using the inclination sensor for landslide measurement includes: drilling a hole in the rock and soil mass where landslides may occur; installing the inclination sensor for landslide measurement on the inclinometer pipe and placing it at the bottom of the drill hole; placing all the sensors Connect the data line of the sensor to the terminal to obtain the initial angle data; turn on the power again every time and record the output data of all sensors to obtain the actual angle data of the time period; use the actual angle data measured in each time period to calculate The horizontal displacement of the entire landslide mass. The invention solves the technical problem in the prior art that when the electronic compass is used to measure the landslide displacement of the landslide body containing ferromagnetic interference, there is a large error or even an erroneous result can be obtained.

Description

Inclination sensor for landslide measurement and method of using the same

technical field

The invention relates to the technical field of landslide measurement, in particular to a sensor capable of measuring the displacement of a landslide body in real time and a method of using the same.

Background technique

my country is a country prone to landslide disasters. Landslide disasters often cause casualties, road burial, house damage and other destructive disasters, which seriously threaten the safety of life and property of the country and the people. Therefore, it is very important to monitor the deep displacement of landslides in real time. In the common landslide displacement monitoring methods, multiple sets of angle or displacement sensors are embedded in the landslide body for real-time measurement, and the real-time changes in the landslide displacement can be obtained by further calculation using the measurement data. The angle sensors used here are basically Electronic compass, electronic compass will have data distortion in the case of electromagnetic interference, and rocks containing iron elements will produce a certain degree of electromagnetic interference, so when electronic compass is used in rocks containing iron elements, there will be large errors or even The wrong results are obtained, so it is urgent to develop a dip sensor that can meet the above geological conditions.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide an inclination sensor for landslide measurement and a method of using the same, so as to solve the technical problem of accurately measuring the angle of a landslide body containing ferromagnetic interference.

The inclination sensor for landslide measurement of the present invention comprises a cylindrical shell, the inner cavity of the cylindrical shell is cylindrical, the inner cavity of the cylindrical shell is filled with liquid, and the cylinder mouth end of the cylindrical shell is connected with a sensor seat, the The sensor seat is provided with a CCD camera for collecting the liquid level image of the liquid in the inner cavity of the cylindrical shell, and the center line of the CCD camera coincides with the center line of the inner cavity of the cylindrical shell.

Further, the front part of the sensor seat is provided with a transparent protective cover which is sleeved outside the CCD camera to isolate the liquid in the inner cavity of the cylindrical shell, the rear part of the sensor seat is provided with a sealing end cover, and the sealing end cover is provided with There is a cable waterproof connector to connect with the data cable of the CCD camera.

Further, a circular stepped hole is arranged in the middle of the sensor seat, the front of the CCD camera protrudes from the front end of the circular stepped hole, and a base pressed on the rear of the CCD camera is arranged in the circular stepped hole. The stepped hole is also provided with a pressure cover pressed on the base, the pressure cover is fixed on the sensor base by screws, a conical hole is arranged in the middle of the base, and a conical hole is arranged in the conical hole, which is sleeved on the data line of the CCD camera. A conical sealing sleeve, the middle of the gland is provided with a conical boss on the end face of the conical sealing sleeve; the sealing end cap seals the mouth of the circular step hole, and is provided between the sealing end cap and the sensor seat There is a first O-ring, and a second O-ring is arranged between the sensor seat and the connection part of the cylindrical shell.

Further, the liquid is composed of water and antifreeze.

The method of using the inclination sensor for landslide measurement of the present invention comprises the following steps:

① Drilling holes in the rock and soil mass where landslides may occur;

② After the drilling is completed, lift the drill pipe, install the inclination sensor for landslide measurement on the inclinometer pipe, and lower the inclinometer pipe to the bottom of the drill hole after the installation is completed;

③ Use the same rock and soil as the landslide body to backfill the gap between the borehole and the inclinometer pipe;

④Connect the data lines of all sensors to the terminal, record the output data of all sensors after turning on the power, get the initial angle data, and then turn off the power;

⑤ Turn on the power again at regular intervals and record the output data of all sensors to obtain the actual angle data of the time period, and then turn off the power;

⑥Using the actual angle data measured in each time period and combining with the initial angle data, calculate the horizontal displacement of the entire landslide mass.

Beneficial effects of the present invention:

The inclination sensor for landslide measurement of the present invention and the method of using the same, the liquid in the cylindrical casing is photographed by a CCD camera, and the liquid boundary is obtained through subsequent image processing. When the sensor is placed vertically, the liquid boundary is a circle, so the circle represents There is no tilt; when the sensor is tilted, the liquid boundary is an ellipse, and the long axis of the ellipse can be obtained through subsequent graphics processing, and the long axis value is different for different tilt angles. The real-time change of landslide displacement can be obtained by calculating the detected data at time.

The inclination sensor for landslide measurement and its using method of the present invention are not affected by electromagnetic interference, and solve the technical problem in the prior art that when the electronic compass is used to measure the landslide displacement of the landslide body containing ferromagnetic interference, there is a large error or even an erroneous result can be obtained .

Description of drawings

FIG. 1 is a schematic structural diagram of an inclination sensor for landslide measurement in an embodiment.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

As shown in the figure, the inclination sensor for landslide measurement in this embodiment includes a cylindrical casing 1, the inner cavity 2 of the cylindrical casing is cylindrical, the inner cavity of the cylindrical casing is filled with liquid 3, and the cylinder mouth end of the cylindrical casing is A sensor base 4 is connected, and the sensor base is provided with a CCD camera 5 for collecting the liquid level image of the liquid in the inner cavity of the cylindrical shell, and the center line of the CCD camera coincides with the center line of the inner cavity of the cylindrical shell.

The cylindrical casing in this embodiment is made of stainless steel, which has good strength and corrosion resistance, and can ensure the service life of the sensor. Of course, the cylindrical casing can also be made of its material in different embodiments.

The principle of measuring the inclination angle with the inclination sensor for landslide measurement in this embodiment is as follows:

When the sensor is placed vertically, the liquid surface boundary can be obtained by taking pictures of the liquid with a CCD camera and subsequent image processing. Since the liquid surface boundary in the sensor is circular when it is placed vertically, the circle represents no tilt; when the sensor is placed vertically When tilting occurs, the liquid surface is photographed by a 10-CCD camera and the liquid surface boundary can be obtained through subsequent image processing. Since the liquid surface boundary is elliptical when tilted, the long axis of the ellipse can be obtained through subsequent graphics processing, and the angle of inclination can be obtained. Different long axis values are different, according to which the tilt angle of the sensor can be calculated.

As an improvement to the above-mentioned embodiment, the front part of the sensor seat is provided with a transparent protective cover 6 which is sleeved outside the CCD camera to isolate the liquid in the inner cavity of the cylindrical shell, and the rear part of the sensor seat is provided with a sealing end cover 7 , the sealing end cover is provided with a cable waterproof connector 8 connected with the data line of the CCD camera. The transparent protective cover in this embodiment is made of transparent PVC, which has good light transmittance and will not affect the image captured by the CCD camera. Of course, in different embodiments, the transparent protective cover can also be made of other materials. Liquid vapors are prevented from damaging the CCD camera by isolating the liquid with a transparent protective cover. Setting the sealing end cap 7 can protect the CCD camera in the sensor seat.

As an improvement to the above-mentioned embodiment, a circular stepped hole is provided in the middle of the sensor base, the front of the CCD camera protrudes from the front end of the circular stepped hole, and a circular stepped hole is provided in the circular stepped hole, which is pressed against the rear of the CCD camera. The base 9 on the base, the circular stepped hole is also provided with a pressure cover 10 pressed on the base, the pressure cover is fixed on the sensor base by screws, a conical hole is arranged in the middle of the base, and a sleeve is arranged in the conical hole On the conical sealing sleeve 11 on the data line of the CCD camera, the middle part of the gland is provided with a conical boss that tops the end face of the conical sealing sleeve; the sealing end cap seals the mouth of the circular step hole, and A first O-ring 12 is arranged between the sealing end cover and the sensor seat, and a second O-ring 13 is arranged between the sensor seat and the connecting portion of the cylindrical housing. In this improvement, the base and the cover are used to press and fix the CCD camera, and the installation is simple and convenient. In addition, by providing a conical sealing sleeve, a first O-ring and a second sealing ring for waterproof sealing, the CCD camera can be prevented from invading and damaging by water vapor, and the liquid in the cylindrical casing can also be prevented from evaporating and escaping.

As an improvement to the above-mentioned embodiment, in this embodiment, the liquid in the inner cavity of the cylindrical shell is composed of water and antifreeze. By adding antifreeze, the freezing point of the liquid is lower, so that the sensor is suitable for use in a low temperature environment.

The method of using the inclination sensor for landslide measurement in this embodiment includes the following steps:

① Drilling holes on the rock and soil mass where landslides may occur; in this embodiment, the drilling depth reaches 10 meters below the bedrock. Of course, the drilling depth can be adjusted according to needs in different embodiments.

② After the drilling is completed, lift the drill pipe, install the inclination sensor for landslide measurement on the inclinometer pipe, and lower the inclinometer pipe to the bottom of the drill hole after the installation is completed. In this embodiment, an inclination sensor for landslide measurement is installed on the inclinometer pipe every 3 meters. Of course, in different embodiments, the installation interval and the number of sensors may need to be adjusted more.

③ Use the same rock and soil as the landslide body to backfill the gap between the borehole and the inclinometer pipe.

④Connect the data lines of all sensors to the terminal, record the output data of all sensors after turning on the power, get the initial angle data, and then turn off the power.

⑤ Turn on the power again at regular intervals and record the output data of all sensors to obtain the actual angle data of this time period, and then turn off the power.

⑥Using the actual angle data measured in each time period and combining with the initial angle data, calculate the horizontal displacement of the entire landslide mass.

In this embodiment, the inclination sensor for landslide measurement and its using method are not affected by electromagnetic interference, which solves the problem that in the prior art, when the electronic compass is used to measure the landslide displacement of the landslide body containing ferromagnetic interference, there is a large error or even an erroneous result can be obtained. technical problem.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (3)

1. The inclination sensor for landslide measurement is characterized in that: it comprises a cylindrical shell, the inner cavity of the cylindrical shell is cylindrical, the inner cavity of the cylindrical shell is filled with liquid, and the cylinder mouth end of the cylindrical shell is connected with a sensor seat , the sensor base is provided with a CCD camera for collecting the liquid level image of the liquid in the inner cavity of the cylindrical shell, and the center line of the CCD camera coincides with the center line of the inner cavity of the cylindrical shell; The front part of the sensor seat is provided with a transparent protective cover which is sleeved outside the CCD camera to isolate the liquid in the inner cavity of the cylindrical shell, the rear part of the sensor seat is provided with a sealing end cover, and the sealing end cover is provided with Waterproof connector of the cable connected to the data cable of the CCD camera; The middle of the sensor seat is provided with a circular step hole, the front of the CCD camera protrudes from the front end of the circular step hole, the circular step hole is provided with a base pressed on the rear of the CCD camera, and the circular step hole There is also a pressure cover pressed on the base, the pressure cover is fixed on the sensor seat by screws, the middle of the base is provided with a conical hole, and a conical hole sleeved on the data line of the CCD camera is arranged in the conical hole. The sealing sleeve, the middle part of the gland is provided with a conical boss on the end face of the conical sealing sleeve; the sealing end cover seals the mouth of the circular stepped hole, and a first sealing end cover is arranged between the sealing end cover and the sensor seat an O-shaped sealing ring, and a second O-shaped sealing ring is arranged between the sensor seat and the connecting part of the cylindrical shell; When the sensor is placed vertically, the liquid boundary is circular, which means that there is no tilt; when the liquid boundary is elliptical, it means that the sensor is tilted, and the tilt angle of the sensor is calculated according to the long axis of the ellipse. 2 . The inclination sensor for landslide measurement according to claim 1 , wherein the liquid is composed of water and antifreeze. 3 . 3. the using method of the inclination sensor for landslide measurement described in claim 1 or 2, is characterized in that, comprises the following steps: ① Drilling holes in the rock and soil mass where landslides may occur; ② After the drilling is completed, lift the drill pipe, install the inclination sensor for landslide measurement on the inclinometer pipe, and lower the inclinometer pipe to the bottom of the drill hole after the installation is completed; ③ Use the same rock and soil as the landslide body to backfill the gap between the borehole and the inclinometer pipe; ④Connect the data lines of all sensors to the terminal, record the output data of all sensors after turning on the power, get the initial angle data, and then turn off the power; ⑤ Turn on the power again at regular intervals and record the output data of all sensors to obtain the actual angle data of the time period, and then turn off the power; ⑥Using the actual angle data measured in each time period and combining with the initial angle data, calculate the horizontal displacement of the entire landslide mass.

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