KR20170072075A - Apparatus and method for mesurement slope surface safety - Google Patents

Abstract

The slope safety measurement device includes a light irradiation device for irradiating the slant surface with a double light pattern, an image acquisition device for acquiring a dual light pattern image with respect to the double light pattern irradiated on the slant surface, And a control device for forming a 3D mesh surface and measuring the safety state of the slope through the shape displacement of the virtual 3D mesh surface.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for measuring slope safety,

The present invention relates to an apparatus and a method for measuring the safety of a slope surface, and more particularly, And methods.

In recent years, there have been disasters in slope failure and fallout due to heavy rainfall and floods, and the intensity and the risk are continuously increasing. These disasters / disasters vary in size and form due to rapid climate change, global warming and urbanization, and the neglect of safety. The demand for various disaster situations prediction and analysis systems is increasing There is a situation.

Conventional slope failure detection techniques include a sensor such as a tilt sensor, a tension sensor, a tilt detection sensor, a pressure sensor, and a control device such as a gateway that interlocks with a sensor to detect a slope collapse, And a method of notifying the detection result to an external management server through a gateway is widely used when an abnormal data value other than the usual one is measured. In this method, a large number of sensors are installed directly on the slope surface, a considerable level of installation cost and operation cost are required, periodic user inspection is required in order to check whether the sensor is malfunctioning, and in case of a sudden slope collapse, The operation of the gateway for transmission may be stopped by burial or the like, so that it may not be easy to transfer data to the management server when necessary. In addition, there arises a problem that the image for confirming the scene situation at the time of the occurrence such as slope collapse can not be utilized properly.

As described above, the conventional slope failure detection method is a method in which a plurality of sensors are buried directly on the slope surface to read out the presence or absence of abnormality by acquiring sensor information. As a result, there is a problem of misoperation of an underground sensor, And sensor reusability problems.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a slope surface safety measuring apparatus and method capable of solving the problem of a technique of detecting a safety state of a slope by directly installing a sensor on a slope face.

According to an embodiment of the present invention, there is provided a slope surface safety measuring device for measuring a safety state of a slope face. The slope safety measurement device includes a light irradiation device, an image acquisition device, and a control device. The light irradiating device irradiates a double light pattern onto the slant surface. The image acquiring device acquires a double light pattern image for the double light pattern irradiated on the slant surface. The controller analyzes the double light pattern image to form a virtual 3D mesh surface, and measures the safety state of the slope through the shape displacement of the virtual 3D mesh surface.

According to the embodiment of the present invention, instead of directly inserting the sensors, the image acquisition device, the data transfer device, and the like directly on the slope surface, a light irradiation device is provided on a position away from the slope surface, and a double light pattern for detecting collapse It is possible to solve the reusability problem of the installation equipment by reducing the sensor installation work cost and the installation cost of the sensor, and greatly reducing the processing time and cost for each of the underground sensors when the sensor is malfunctioned. Do.

In addition to the primary disasters such as urban flood damage, large-scale landslides, and falling rocks, the second disaster, such as facility collapse, human and material safety accidents, and so on, Alternatives are possible.

1 is a conceptual diagram of a slope surface safety measuring apparatus according to an embodiment of the present invention.
2 is a block diagram of a slope surface safety measuring apparatus according to an embodiment of the present invention.
3 is a diagram illustrating an example of a double light pattern structure according to an embodiment of the present invention.
4 is a flowchart illustrating a slope surface safety measurement method according to an embodiment of the present invention.
5 is a diagram illustrating an example of a method of processing a dual light pattern image in a controller according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a slope surface safety measuring apparatus and method according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a conceptual diagram of a slope surface safety measuring device according to an embodiment of the present invention, FIG. 2 is a block diagram of a slope surface safety measuring device according to an embodiment of the present invention,

1, the slope surface safety measuring apparatus 100 includes a light irradiating apparatus 110, an image acquiring apparatus 120, and a control apparatus 130. As shown in FIG. As shown in Fig. 1, the light irradiation device 110, the image acquisition device 120, and the control device 130 are not embedded directly on slopes but are installed at a predetermined distance from slopes.

2, the slope surface safety measuring apparatus 100 may further include a monitoring device 140 and an alarm device 150.

Referring to Figs. 1 and 2, the light irradiation apparatus 110 generates a double light pattern, and irradiates the generated double light pattern on the sloped surface. The double light pattern may be formed in any shape and may be generated such that the light patterns arranged in consideration of the beam angle of the light irradiating device 110 according to the distance do not overlap each other. For example, one light pattern may be formed on the diagonal of another light pattern. The light irradiating device 110 can adjust the inter-pattern spacing, the pattern size, the number of patterns, and the like of the double light pattern. At this time, the presence or absence of the formation of the double light pattern may be optional, and the predetermined double light pattern may be input to the light irradiation apparatus 110. The light irradiation device 110 may include a diffractive optical element (DOE) or a micro electro mechanical system (MEMS) device for generating a light pattern.

At this time, infrared light can be used as a light source of a double light pattern. If the infrared light is used as the light source of the double light pattern as described above, it is possible to continuously observe the safety state of the slope even at nighttime when the field of view is not ensured.

The image acquisition device 120 acquires the double light pattern image of the double light pattern irradiated by the light irradiation device 110 and transmits the obtained double light pattern image to the control device 130. The image acquisition device 120 may include an image sensor of the camera.

The controller 130 analyzes the double light pattern image transmitted from the image capturing apparatus 120 and measures the safety state of the slope surface. The controller 130 may be implemented as a central processing unit (CPU) or other chipset, a microprocessor, or the like.

The control device 130 transmits the safety state measurement result to the monitoring device 140 and transmits the alarm control signal to the alarm device 150 when an abnormal symptom is detected in the sloped surface as a result of the safety state measurement of the sloping surface. The control device 130 may be implemented in the gateway device or in the monitoring device 140.

The monitoring device 140 monitors the safety state measurement result of the slope.

The alarm device 150 generates a disaster occurrence alarm in accordance with the alarm control signal.

3 is a diagram illustrating an example of a double light pattern structure according to an embodiment of the present invention.

Referring to FIG. 3, the dual light pattern 200 includes a main light pattern 210 and an auxiliary light pattern 220 having different sizes.

The main light pattern 210 is formed in a pattern in the image acquisition device 120 at a short distance and at a long distance.

The auxiliary light pattern 220 is formed at a distance from the image capturing apparatus 120 to noise due to the resolution of the image capturing apparatus 120 according to the distance difference and is formed as a pattern in the image capturing apparatus 120 at a short distance.

The use of the main light pattern 210 and the auxiliary light pattern 220 having different sizes as in the embodiment of the present invention can be realized by using the main light pattern 210 except for the auxiliary light pattern 220 at a near- And to solve the resolution degradation due to the distance between patterns by using the double light pattern 200 at a long distance.

4 is a flowchart illustrating a slope surface safety measurement method of a control apparatus according to an embodiment of the present invention, and FIG. 5 is a view illustrating an example of a method of processing a dual light pattern image in a control apparatus according to an embodiment of the present invention .

Referring to FIG. 4, the controller 130 binarizes the double-photon pattern image when the double-photon pattern image is input from the image capturing apparatus 120 (S410), divides the binarized double-light pattern into a plurality of regions Then, a processing order for a plurality of areas is determined (S420). For example, after the double light pattern is binarized as shown in FIG. 5A, the binarized double light pattern can be divided into a plurality of regions as shown in FIG. 5B, and then the processing order can be determined. For example, the processing order for a plurality of areas can be determined in the order from left to right and from bottom to top.

The controller 130 performs the area clustering on the horizontal and vertical column patterns based on the center coordinates of the corresponding area according to the processing sequence (S430).

The region clustering first clusters the pattern regions having similar Y coordinates. A similar Y coordinate means a coordinate within an area located in the upper and lower d / 2 with respect to the center coordinate of the corresponding pattern area after selecting an arbitrary unit pattern by obtaining an average distance d between each unit pattern in one image frame. The controller 130 processes all the unit patterns in this area into the same cluster to cluster them. The controller 130 selects any one of the unit patterns other than the clustered unit patterns and repeats the same process to cluster all the unit patterns. And rearranged in the order of rearrangement based on the Y coordinates of the clustered pattern regions. In the same way, the controller 130 performs clustering of pattern region interleaving having similar X-coordinates. As a result, as shown in FIG. 5C, the main light pattern and the auxiliary light pattern are grouped into each of the horizontal rows and vertical columns. Here, in FIG. 5C, x / y represents the X coordinate / Y coordinate. At this time, the control device 130 can confirm whether the main light pattern and the auxiliary light pattern are present by comparing pattern sizes in the clustered area.

In operation S440, the control unit 130 corrects the pattern area in which errors have occurred through slant surface contamination, light reflection, animal movement, and the like in the pattern in the clustered area. If there is more than a predetermined number of neighboring patterns through the presence or absence of neighboring pattern regions, the control apparatus 130 newly interpolates the pattern region at the current position. If the pattern region existing at the current position exists independently of neighboring neighboring pattern regions, It is possible to modify the pattern area in which the pattern error has occurred by recognizing the area as an error and removing the pattern area existing at the current position.

The controller 130 creates virtual 3D meshes by connecting the patterns in the clustered regions to each other (S450). That is, as shown in FIG. 5 (d), when the respective patterns in the clustered region are connected to each other, a virtual 3D mesh is generated.

The controller 130 corrects the error region of the configured virtual 3D mesh (S460). The controller 130 can correct the error region of the virtual 3D mesh through interpolation or elimination of connection lines through presence or absence of inter-pattern connecting lines in a neighboring clustered region.

The control device 130 stores the entire structure of the virtual 3D mesh in the current state.

The control device 130 performs the same steps for the periodically input double light pattern image and compares the structure of the previously stored virtual 3D mesh with the structure of the newly processed virtual 3D mesh through pattern matching between the patterns, And diagnoses the current state of the slope (S470). When the control unit 130 determines that an error has occurred in the entire 3D mesh structure or a part of the 3D mesh structure as a result of the comparison, the controller 130 detects that an anomaly has occurred, transmits the comparison result information to the monitoring apparatus 140, As shown in FIG. Here, the controller 130 may determine that an error has occurred when the mismatch between the entire 3D mesh structure or the 3D mesh structure and the previously stored virtual 3D mesh is equal to or greater than the preset threshold value.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented by a program for realizing functions corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. The embodiments can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (1)

A slope surface safety measuring device for measuring a safety state of a slope surface,
A light irradiation device for irradiating a double light pattern onto the slant surface,
An image acquiring device for acquiring a double light pattern image for the double light pattern irradiated on the slant surface, and
A controller for analyzing the double light pattern image to form a virtual 3D mesh surface and measuring the safety state of the slope through the shape displacement of the virtual 3D mesh surface,
And the slope surface measurement device.

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