KR101955213B1 - Water Level Measurement Device using Ultrasonic sensor and Optic Camera - Google Patents

Abstract

The present invention relates to a water level meter, comprising: a neck board main body (10) vertically and vertically installed upright and upright in a vertical direction; An inclined water level detecting plate 20 protruding forwardly of the neck side panel body 10 and inclined continuously for inclining the image to be picked up from a water level upper limit point L_max to a water level lower limit point L_low, )and; A camera 30 for capturing an image of the inclined plane to be imaged at an upper portion of the water level sensing plate 20 and the neck side panel body 10 and transmitting the taken image to the image processing unit 40; An ultrasonic sensor 40 that emits ultrasonic waves toward the water surface at the upper part of the water level sensing plate 20 and the neck side plate body 10 and receives echoes reflected by the water level sensing plate 20; The image of the water level sensing plate 20 captured by the camera 30 is processed so that the edge lines E and E1 of the water level sensing plate 20 and the water line A2 An image processor 50 for simplifying and binarizing the image with a horizontal line (boundary line) C; An ultrasonic control circuit (60) for generating an ultrasonic firing signal and transmitting the signal to the ultrasonic sensor (40) and amplifying the echo ultrasonic signal received by the ultrasonic sensor (40); The distance between the upper edge line E1 and the upper line (boundary line) C, the air area A1, and the number of pixels provided in the image processing unit 40, A central processing unit (70) or a management server for calculating the water level in comparison with the number of pixels and calculating the water level based on the signal of the ultrasonic sensor (40); And an ultrasonic sensor and an image analysis level meter.

Description

[0001] The present invention relates to an ultrasonic sensor and an image analyzer,

The present invention relates to a water level meter having an ultrasonic sensor and a video camera.

Patent Document 1: Japanese Patent Application Laid-Open No. 10-2005-0040899 (ultrasonic level meter) discloses a microwave oven comprising a transmitter for radiating ultrasonic waves at at least two different frequencies for water level measurement; A receiver for receiving ultrasound waves radiated from the transmitter and reflected from the water surface; And a controller for controlling the ultrasonic transmission and reception of the transmitter and the receiver, the ultrasonic level meter having a frequency controller for modulating the ultrasonic waves transmitted and received to reduce at least two or more different frequencies to reduce the attenuation of the ultrasonic signal due to the phase difference. do.

Since the conventional ultrasonic level measuring apparatus is expensive at more than 10 million won per unit, it can not take various measuring points. In case of ultrasonic type, when it is installed in an open space instead of a closed tank, There is a problem that errors are frequent and errors occur frequently in the data reliability part.

Domestic rivers have problems of water shortage and water pollution due to population increase and rapid urbanization in terms of water quality, flood damage due to abnormal climate and sudden flood in terms of size, and damages and incidents related to flood damage There is a steady increase trend. In the past, the construction of dams and the dike of the embankment, and the dredging of the rivers, have been predominantly focused on structural measures, but structural limitations are limited by structural measures in the face of limited resources, various environmental and cultural problems. For this reason, a policy that utilizes rapidly developing IT technology has been proposed as an alternative in recent years. Recently, the development of hydrological instrumentation and equipment for the measurement of crude resin water level in agriculture has been promoted. As a result, 2004 non-power ultrasonic measurement instrument was developed and installed in agricultural reservoir and test pavement.

In the case of using only the ultrasonic sensor, there is a problem that a detection error occurs due to the diffuse reflection due to the surface wave, and in the case of the measurement of the image level, it is impossible to detect when a visual field defect such as a fog occurs.

In the case where only ultrasonic sensors are used in combination with the ultrasonic wave analysis of the present invention, the ultrasonic wave level is supplemented by the recognition of the image level when the detection error occurs due to the diffuse reflection by the surface wave, And to provide an ultrasonic sensor and a water level meter capable of complementing the image analysis.

In the ultrasonic wave sensor and the image analysis combined water level meter of the present invention, in the water level meter,

A neck side plate body 10 which is vertically upwardly and vertically installed on the water surface in an elongated shape;

An inclined water level detecting plate 20 protruding forwardly of the neck side panel body 10 and inclined continuously for inclining the image to be picked up from a water level upper limit point L_max to a water level lower limit point L_low, )and;

A camera 30 for capturing an image of the inclined plane to be imaged at an upper portion of the water level sensing plate 20 and the neck side panel body 10 and transmitting the taken image to the image processing unit 40;

An ultrasonic sensor 40 for emitting ultrasonic waves toward the water surface at the upper part of the water level sensing plate 20 and the neck side plate body 10 and receiving reflected echo ultrasonic waves;

The image of the water level sensing plate 20 captured by the camera 30 is processed so that the edge lines E and E1 of the water level sensing plate 20 and the water line A2 An image processor 50 for simplifying and binarizing the image with a horizontal line (boundary line) C;

An ultrasonic control circuit (60) for generating an ultrasonic firing signal and transmitting the signal to the ultrasonic sensor (40) and amplifying the echo ultrasonic signal received by the ultrasonic sensor (40);

The distance between the upper edge line E1 and the upper line (boundary line) C, the air area A1, and the number of pixels provided in the image processing unit 40, A central processing unit (70) or a management server for calculating the water level in comparison with the number of pixels and calculating the water level based on the signal of the ultrasonic sensor (40);

And a control unit.

According to the present invention, when only an ultrasonic sensor is used in combination with ultrasonic wave and image analysis, when a sensing error occurs due to diffuse reflection due to a surface wave, it is supplemented by image level recognition, and when ultrasonic wave level is detected, An ultrasonic sensor and an image analyzing water level meter capable of compensating for the disadvantages of each other are provided.

1 is a block diagram of an ultrasonic sensor and a water level meter for image analysis according to an embodiment of the present invention.
Fig. 2 is an overall view of the ultrasonic sensor of the present invention and the water level meter for image analysis.
3 is a detailed view of an inclined water level sensing plate according to an embodiment of the present invention;
FIG. 4 is a conceptual diagram of image recognition by mapping of an inclined water level detection plate according to an embodiment of the present invention. FIG.
FIG. 5 is a detailed view of the image sensing concept of the water level sensing plate of the present invention and a camera photographing area.

Hereinafter, the ultrasonic sensor and the image analysis combined water level meter of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of an ultrasonic sensor and an image analyzer water level meter according to an embodiment of the present invention. FIG. 2 is a block diagram of an ultrasonic sensor and an image analyzer water level meter of the present invention. FIG. 4 is a conceptual explanatory view of an image recognition by mapping of an inclined water level detection plate according to an embodiment of the present invention, FIG. 5 is a conceptual view of the water level detection plate image recognition concept of the present invention And a detailed view of the camera shooting area.

1 to 5, the ultrasonic sensor and the image analysis combined water level meter of the present invention include a neck panel 10, an inclined water level sensing plate 20, a camera 30, an ultrasonic sensor 40, An image processing unit 50, an ultrasonic wave control circuit 60, and an ultrasonic wave control circuit 60.

As shown in Figs. 1 to 5, the neck side plate body 10 is installed upright and upright perpendicular to the water surface in a vertically long shape. The neck side plate body 10 may be replaced with a term of a fixed frame for holding the body plate 10 or the water level sensing plate 20 fixedly. It is desirable to have a scale that can be recognized by the naked eye. It is preferable that the body plate 10 has a support leg which is horizontally directed toward the leg or the railing from the upper end. As shown in Fig. 3, the scales for the eyes are easily exposed to one of the body plate 10 or the water level detecting plate 20 for accessor recognition.

As shown in the figure, the inclined water level detection plate 20 is formed to protrude forward of the neck side panel body 10 and extends from the water level upper limit point L_max to the water level lower limit point L_low, Are continuously formed obliquely. As shown in FIG. 3, the water level sensing plate 20 may be protruded in a step. The camera 30 captures an image of the inclined plane for picking up at the upper part of the water level sensing plate 20 and the neck side plate body 10 and transmits the picked up image to the image processing unit 40. [

1 to 5, in the ultrasonic sensor and the image analysis combined dual level instrument of the present invention, the ultrasonic sensor 40 detects ultrasonic waves from the upper part of the water level sensing plate 20 and the neck side plate body 10 toward the water surface, And receives reflected echo ultrasonic waves. The image processing unit 50 processes the image of the water level sensing plate 20 captured by the camera 30 and detects the edge lines E and E1 of the water level sensing plate 20 as well as the underwater area A2 and the aerial area A2 A1) simplify and binarize the image to the adjacent hypotenuse (boundary line, C).

The ultrasound control circuit 60 generates an ultrasound emission signal and transmits the ultrasound emission signal to the ultrasound sensor 40 and amplifies the echo ultrasound signal received from the ultrasound sensor 40. The amplified ultrasonic echo signal is transmitted to the central processing unit 70 or the management server.

The central processing unit 70 or the management server may calculate the distance between the upper ground line E1 and the horizontal line C and the airspace A1 and the number of pixels provided in the image processing unit 40, The total area, and the total number of pixels, and calculates the water level based on the signal from the ultrasonic sensor 40. The water level is calculated based on the signal of the ultrasonic sensor 40. [

As shown in the drawings, in the ultrasonic sensor and the image analysis combined water level meter according to the present invention, the camera 30 may be equipped with pan tilting or two degree of freedom rotation means to pick up an image in any direction, Respectively. The camera 30 always steers the slab type water level sensing plate 20 but can monitor the surrounding situation in an emergency by imaging the arbitrary direction specified by the central processing unit 70 or a command from the management server.

As shown in the figure, the neck panel 10 and the water level detecting plate 20 are constructed as a single piece or integrally formed or integrally formed from the beginning, and the camera 30 is formed vertically downward from the top of the neck panel main body 10 It is desirable to photograph the water level sensing plate 20 to minimize the installation distance between the upper end of the neck side body 10 and the camera 30. [

As shown in Figs. 3 (a) and 3 (b), it is preferable that the angle (angle a) between the slope 20a for image pickup of the water level sensing plate 20 and the water surface is 50 to 80 degrees. If the angle is too large, the shooting range is small and the resolution is low. If the angle is too small, the width of the water level sensing plate 20 becomes too large, which increases the flow resistance of the water.

As shown in the figure, the image processing unit 40 detects the level of the adjacent pixel values of the image frame of the level sensing plate 20 captured by the camera 30, (Boundary line C) where the edge region E or E1 of the plate 20 or the underwater region A2 and the public region A1 are adjacent to each other. It is preferable that the slope 20a for photographing of the level sensing plate 20 is coated with a luminous material and a UV light emitting material so that night mist or image recognition is easy and the camera 30 is an infrared camera.

The image processing unit 50 and the central processing unit 70 may be configured in the control box. Alternatively, the image data may be transmitted to the management computer by the transmission means incorporated in the control box and processed by the image processing unit and the central processing unit of the management computer / management server. The power source of the control box for operating the apparatus is supplied with power by the photovoltaic power generation device 80.

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, but on the contrary, ≪ RTI ID = 0.0 > and / or < / RTI >

It is to be understood that the appended claims are intended to supplement the understanding of the invention and should not be construed as limiting the scope of the appended claims.

10: neck side plate body
20: inclined water level detection plate
30: Camera
40: Ultrasonic sensor
50:
60: Ultrasonic control circuit
70:
80: Photovoltaic device

Claims (6)

In a water level meter,
A neck side plate body 10 which is vertically upwardly and vertically installed on the water surface in an elongated shape;
An inclined water level detecting plate 20 protruding forwardly of the neck side panel body 10 and inclined continuously for inclining the image to be picked up from a water level upper limit point L_max to a water level lower limit point L_low, )and;
A camera 30 for capturing an image of the inclined plane to be imaged at an upper portion of the water level sensing plate 20 and the neck side panel body 10 and transmitting the taken image to the image processing unit 40;
An ultrasonic sensor 40 that emits ultrasonic waves toward the water surface at the upper part of the water level sensing plate 20 and the neck side plate body 10 and receives echoes reflected by the water level sensing plate 20;
The image of the water level sensing plate 20 captured by the camera 30 is processed so that the edge lines E and E1 of the water level sensing plate 20 and the water line A2 An image processor 50 for simplifying and binarizing the image with a horizontal line (boundary line) C;
An ultrasonic control circuit (60) for generating an ultrasonic firing signal and transmitting the signal to the ultrasonic sensor (40) and amplifying the echo ultrasonic signal received by the ultrasonic sensor (40);
The distance between the upper edge line E1 and the upper line (boundary line) C, the air area A1, and the number of pixels provided in the image processing unit 40, A central processing unit 70 or a management server for calculating the water level in comparison with the number of pixels and calculating the water level based on the signal of the ultrasonic sensor 40;
And an ultrasonic sensor and an image analyzing water level meter. The method according to claim 1,
The camera 30 may be equipped with a pan tilting or two degree of freedom rotation means to pick up an image in any direction and has a working optical illumination (LED)
The camera 30 always steers the oblique water level sensing plate 20,
And the surrounding situation can be monitored in the event of an emergency by imaging the arbitrary direction specified by the command of the central processing unit (70) or the management server.
The method according to claim 1,
The neck side plate body 10 and the water level sensing plate 20 are integrally formed or integrally molded from the beginning,

The camera 30 photographs the water level sensing plate 20 vertically downward from the upper side of the neck side panel body 10 to minimize the installation distance between the upper end of the neck side panel body 10 and the camera 30 Ultrasonic sensor and image analysis combined water level meter.
The method according to claim 1,
Wherein an angle (angle a) between the sloped surface for image capture 20a of the water level detection plate 20 and the water surface is 50 to 80 degrees, and the ultrasonic sensor and the image analysis combined water level meter.
The method according to claim 1,
The image processing unit 40 may be configured to detect the brightness level or color data of neighboring pixel values of the image frame of the level sensing plate 20 captured by the camera 30, (Border line, C) adjacent to the edge area (E, E1) or the underwater area (A2) and the public area (A1) of the water level meter.
The method according to claim 1,
A light-emitting material and a UV light-emitting material are coated on the inclined surface 20a for photographing of the water level sensing plate 20 so as to facilitate night mist or image recognition,

Wherein the camera (30) is an infrared camera.

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