阅读说明：本技术 一种适用于智慧水环境透明度图像识别检测方法 (Image recognition detection method suitable for transparency of smart water environment ) 是由 刘磊 王宇峰 田平 黄燕 王荣荣 沈知力 卓未龙 于 2019-10-22 设计创作，主要内容包括：本发明涉及智慧水环境领域。目的是提供一种检测效率高、实时性强的水体透明度的图像自动识别检测方法。技术方案是：一种适用于智慧水环境透明度图像识别检测方法,包括：1)在水质监测点用水位计测量水位高度,获得数据；2)在水质监测点竖直固定一带有塞氏盘的螺纹杆件；所述塞氏盘通过设置在其中心的螺母可转动地定位在螺纹杆件上；在塞氏盘的两边安装有竖直固定的导轨,所述塞氏盘的边沿设置有与导轨滑动配合的滑块；另在岸边设置一对准塞氏盘的高清摄像头；3)驱动塞氏盘使其在螺纹杆件绕自身轴线转动的同时由螺纹杆件底端往水面上升；每旋转一定转数由高清摄像头采集其图像,直至塞氏盘转动至水面。(The invention relates to the field of intelligent water environments. The method is high in detection efficiency and strong in real-time performance. The technical scheme is as follows: a method for recognizing and detecting images suitable for transparency of a smart water environment comprises the following steps: 1) measuring the water level height by using a water level meter at a water quality monitoring point to obtain data; 2) a threaded rod piece with a plug disc is vertically fixed at a water quality monitoring point; the plug disc is rotatably positioned on the threaded rod piece through a nut arranged at the center of the plug disc; the two sides of the Samson disk are provided with vertically fixed guide rails, and the edge of the Samson disk is provided with a sliding block which is in sliding fit with the guide rails; in addition, a high-definition camera aligned with the Seitz disk is arranged on the bank; 3) the plug disc is driven to enable the plug disc to ascend from the bottom end of the threaded rod piece to the water surface while the threaded rod piece rotates around the axis of the plug disc; when the plug disk rotates for a certain number of revolutions, the high-definition camera collects images until the plug disk rotates to the water surface.)

1. A method for recognizing and detecting images suitable for transparency of a smart water environment comprises the following steps:

1) measuring the height of the water level by using a water level meter (6) at a water quality monitoring point to obtain data;

2) a threaded rod piece (2) with a plug disc (3) is vertically fixed at a water quality monitoring point; the plug disc is rotatably positioned on the threaded rod piece through a nut (4) arranged at the center of the plug disc; two sides of the Samson disk are provided with vertically fixed guide rails (5), and the edge of the Samson disk is provided with a sliding block which is in sliding fit with the guide rails; in addition, a high-definition camera (1) aligned with the Seitz disc is arranged on the shore;

3) the motor (7) drives the threaded rod to rotate, force is transmitted to the nut, and the nut drives the plug disc to ascend from the bottom end of the threaded rod piece to the water surface along the fixed guide rail; acquiring images of the disc by the high-definition camera every time the disc rotates for a certain number of revolutions until the disc rotates to the water surface;

4) transmitting all the images to a terminal, and detecting the visibility of the image of the Securia disc; calculating the minimum rotation number of the accumulated rotation of the visible image of the Samsung disk, and converting the minimum rotation number into the distance from the Samsung disk to the bottom of the rod at the moment; the water transparency is obtained from the difference between the water level and the distance from the Samsung disc to the bottom of the rod.

2. The method for recognizing and detecting the transparency image of the smart water environment according to claim 1, wherein: in step 4), the distance from the Seashore disk to the bottom of the rod piece is the product of the minimum number of accumulated rotations when the Seashore disk image is visible and the lead of the threaded rod piece.

Technical Field

The invention relates to the field of intelligent water environments, in particular to a transparency image recognition and detection method suitable for the intelligent water environments.

Background

The water transparency is an important index for judging the water quality and the water eutrophication degree, and is also an important basis for judging the water quality grade, the water nutrition level and the primary productivity of the water. The traditional water transparency detection method comprises a plumb method, a cross method, a Seitz disk method and a photometric transparency measurement method. The Seakerman disc method is widely used for monitoring the transparency of water bodies due to the characteristics of simple operation and large measurement range.

In recent years, with the development of wireless sensor networks and wireless communication technologies, water quality monitoring is developing in a direction of remote monitoring, automation monitoring and intellectualization monitoring. The water transparency is used as an important index for water quality monitoring, and the realization of remote, automatic and intelligent monitoring of the water transparency is beneficial to improving the water quality monitoring efficiency and helping related departments to acquire continuous water quality monitoring data in time.

Disclosure of Invention

The invention aims to overcome the defects of the background technology and provide the automatic image identification and detection method for the water transparency, which has high detection efficiency and strong real-time performance.

The technical scheme provided by the invention is as follows:

a method for recognizing and detecting images suitable for transparency of a smart water environment comprises the following steps:

1) measuring the water level height by using a water level meter at a water quality monitoring point to obtain data;

2) a threaded rod piece with a plug disc is vertically fixed at a water quality monitoring point; the plug disc is rotatably positioned on the threaded rod piece through a nut arranged at the center of the plug disc; the two sides of the Samson disk are provided with vertically fixed guide rails, and the edge of the Samson disk is provided with a sliding block which is in sliding fit with the guide rails; in addition, a high-definition camera aligned with the Seitz disk is arranged on the bank;

3) the plug disc is driven to enable the plug disc to ascend from the bottom end of the threaded rod piece to the water surface while the threaded rod piece rotates around the axis of the plug disc; acquiring images of the disc by the high-definition camera every time the disc rotates for a certain number of revolutions until the disc rotates to the water surface;

4) transmitting all the images to a terminal, and detecting the visibility of the image of the Securia disc; calculating the minimum rotation number of the accumulated rotation of the visible image of the Samsung disk, and converting the minimum rotation number into the distance from the Samsung disk to the bottom of the rod at the moment; the water transparency is obtained from the difference between the water level and the distance from the Samsung disc to the bottom of the rod.

In step 4), the distance from the seng disc to the bottom of the rod is the product of the minimum rotation number of the accumulated rotation when the seng disc image is visible and the lead of the threaded rod.

The principle of the invention is as follows: the Seitz disc is arranged on a vertically arranged threaded rod piece and rotates along the threads from the water bottom to the position where the image of the Seitz disc is just visible, and the distance from the Seitz disc to the water surface is the transparency of the water body; therefore, the transparency of the water body is water level height data, and the distance from the Securie disc to the water bottom when the Securie disc image is just visible is subtracted; the distance from the sabre plate to the water bottom when the image is just visible is equal to the product of the cumulative rotating speed of the sabre plate from the water bottom when the image of the sabre plate is just visible (i.e. the cumulative rotating minimum number of rotations when the image of the sabre plate is visible) and the lead of the screw rod.

The invention has the beneficial effects that: the provided method for detecting the water transparency realizes the monitoring result of the water transparency through image recognition, is beneficial to improving the water quality monitoring efficiency and acquiring continuous water transparency monitoring data.

Drawings

Fig. 1 is a schematic front view of the present invention.

Fig. 2 is a schematic top view of the present invention (the camera 1, the nut 4, and the motor 7 are omitted in the figure).

Wherein:

1-high-definition camera; 2-a threaded rod; 3-the Seitz disc; 4, a nut; 5, a guide rail;

6-a water level meter; 7-electric machine

Detailed Description

The invention will be described in further detail below with reference to an embodiment shown in the drawings.

As shown in fig. 1, the method for detecting the transparency of the water body comprises the following steps:

1. obtaining water level height (i.e. depth of water)

Obtain current water level height through fluviograph 6 to with data transmission to terminal, in this embodiment, water level height is 2.3 m.

2. Device for setting water quality monitoring point

Arranging a high-definition camera 1, a threaded rod piece 2 (two ends of the threaded rod piece are rotatably and vertically positioned at the water quality monitoring point through a support with a bearing), a Securie disc 3, a guide rail 5 and a motor 7 which are vertically fixed at the water quality monitoring point; the plug disc is connected with the threaded rod piece in a matching way through a nut 4 arranged at the center of the plug disc, two sliding blocks are arranged at the two side edges of the plug disc, and the two sliding blocks are in sliding fit with guide rails vertically fixed at the two sides of the plug disc (so that when the threaded rod piece rotates, the plug disc only moves upwards and does not rotate); the initial position of the Samsung disc is at the bottom of the rod piece; a motor 7 is also mounted at the bottom position of the rod and drives the screw rod via a transmission member (preferably a gear train; the transmission member is omitted from the figure). The screw lead of the rod is 40mm, and the height is 3 m; when the high-definition camera is arranged, the high-definition camera needs to be ensured to be perpendicular to a Seitz disc to acquire images.

3. Collecting images of a Sagerbil's disc

Acquiring an image every time the threaded rod rotates for 5 circles, coding the acquired image from A, and correlating the rotation number; stopping collecting the image after the Securie disc rises to the water surface; controlling the Samson disc to reset to an initial position; the acquired images are transmitted to the terminal, and in the embodiment, 12 images are acquired in total.

4. Analyzing Severe disc image visibility

The visibility of the image of the senna disc returned to the terminal is analyzed and the visible senna disc image (i.e. the number of turns of the cumulative rotation of the senna disc from the water bottom to the moment when the image of the senna disc is just visible) associated with the minimum number of turns of rotation is found, the transparency of the water body being the water level height-lead x the minimum number of turns of the cumulative rotation when the image of the senna disc is visible. In this embodiment, the minimum cumulative number of rotations of the visible starfish disk image is 45 (the starfish disk image cannot be seen if the number of rotations is less than 45), and the transparency of the water body obtained through final calculation is 0.5 m.