KR101997683B1 - Method and apparatus for detecting foreign matter of a pump based on video - Google Patents

Abstract

According to the present invention, a method for detecting a foreign substance of a pump including a motor housing having a motor installed therein, a rotary body connected to a motor shaft of the motor to be rotated, a casing including an inlet to suck a fluid and an outlet to discharge a sucked fluid, and a camera fixing member coupled to the casing to allow a camera facing the rotary body from below to be coupled thereto comprises: a step of generating data for determining a front view of photographed data received from the camera by a foreign substance detecting apparatus connected to the camera; a step of generating pixel distribution data by analyzing photographed data received from the camera after generating the data for determining a front view; a step of determining whether the data for determining a front view and the pixel distribution data match within a preset range; and a step of determining detection of a foreign substance towards the rotary body if the data do not match as a result of the determination.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and an apparatus for detecting foreign substances in an image-based pump,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting a foreign object in a pump capable of detecting a foreign object on the basis of an image captured by a camera.

The pump is a machine that transports liquid or gas fluid through a pipe by pressure action, or pushes fluid in a low pressure vessel through a pipe into a high pressure vessel. Such a pump may be a reciprocating pump rotary pump, a centrifugal pump, an axial pump, a friction pump, a sludge pump and other pumps depending on the structural difference.

Among these pumps are an underwater motor pump, which is always operated in a submerged state, and a main pump, which is placed on the ground and contains a guide casing and a propeller, which is used under water.

In order to confirm the driving state of the pump or the state or operation state of each component constituting the pump by stopping the operation of the pump, So that maintenance of the pump is difficult.

That is, these pumps operate underwater, and various foreign substances such as sand, gravel, and wood chips are present in the water, and may be damaged due to such foreign substances or various other causes. In the case of such a pump failure, in order to ascertain the cause of the failure, it is necessary to lift the pump to the ground and disassemble the pump to find the cause. When such a pump is large in capacity, it takes much time and labor for lifting and disassembling, In the case of a pump installed at the same place as a pump station, there is a problem that the water floods while the pump is being replaced and the neighboring area is flooded.

A variety of techniques have been developed relating to pumps with a camera to be able to sense the internal state or operating state of the pump.

First, in the first related art, the first bracket is further coupled to the outer periphery of the motor shaft of the motor constituted inside the motor housing, and the motor is connected to the first bracket to monitor the motor internal abnormality The present invention relates to a pump having a camera and a rotating body surveillance camera coupled to a first bracket and photographing the rotating body to monitor abnormality of the rotating body.

The second technique relates to a pump equipped with a camera whose structure is improved so that the pump can be firmly attached to the inside of the pump while minimizing interference with fluid flow, and can photograph an accurate region.

However, such a conventional pump is operated in a state where it is installed in a basement such as a dark well, and when installed in such a dark place, the image taken by the camera is not clear, which deteriorates the monitoring function.

Particularly, in the case of a chopper pump, a longitudinal shaft connecting shaft is installed on a rotary shaft of a ground motor installed on the ground to pump water by rotating a propeller immersed in the shaft, and a large number of bearings are provided for supporting the long shaft. There is a problem that the mouth pump can not function due to aging of the bearing.

However, it has been difficult to check the condition of the equipment and to maintain it because the pump has to be used to lift the pump from a large capacity and it takes much time and manpower to disassemble.

Korean Registered Patent No. 10-1468066 (Registered on November 26, 2014)

The present invention relates to a pump capable of sensing the presence of a foreign substance on a rotating body based on an image received from a camera after a camera capable of photographing the rotating body portion of the pump is fixedly mounted on the pump, Method and apparatus.

According to another aspect of the present invention, there is provided a method for detecting foreign substances in a pump including a motor housing having a motor therein, a rotating body connected to the motor shaft of the motor and rotated, And a camera fixing member coupled to the casing and coupled to the camera for viewing the direction of the rotating body in a downward direction, the method comprising the steps of: Generating foreground determination data on the photographic data received from the camera by the foreign substance sensing device connected to the camera; analyzing the photographic data received from the camera after generating the foreground determination data; And generating the foreground determination data and the pixel distribution data Determining whether or not the data coincide within a predetermined range; and determining that foreign matter is detected in the direction of the rotating body when the result of the determination is not coincident.

According to an embodiment of the present invention, the foreground determination data may be a pixel distribution value according to a result of analyzing an image received from the camera before the motor operation.

According to an embodiment of the present invention, the step of generating the foreground determination data may include the step of calculating the turbidity value by checking the degree of suspended matter in the water through comparison between the photographed data received from the camera before the motor operation and the pre- And generating foreground determination data, which is a pixel distribution value of the received image, based on the turbidity value.

According to the embodiment of the present invention, the step of generating the foreground determination data includes temporarily storing the image pickup data received from the camera for a preset time after the operation of the motor, and analyzing the temporarily stored image data And generating foreground determination data using the generated pixel distribution value.

According to an embodiment of the present invention, the foreign substance sensing method may include the steps of increasing the counter value by "1" after determining that the foreign substance is sensed, determining whether the counter value is a preset counter value "n & If the counter value is not the predetermined counter value "n ", the process proceeds to the step of generating the pixel distribution data, and if it is determined that the counter value is" n " And notifying the administrator thereof.

According to an aspect of the present invention, there is provided a pump including: a motor housing having a motor therein; a rotor rotatably connected to a motor shaft of the motor; And a discharge port for discharging the fluid discharged from the discharge port. The pump is coupled to an outer circumferential surface of a suction port rim of the casing, an extension plate coupled to the casing, a fixed plate formed on one side of the extension plate, A camera fixing member formed on the other side of the extension plate and configured to be inclined with respect to the extension plate with respect to the extension plate so that the camera is directed in a direction toward the suction port or a direction in which foreign matter introduced through the suction port can be detected, On the basis of photographing data received from a camera coupled to the swash plate And a foreign matter sensing device for analyzing the photographic data received from the camera after generating the foreground determination data and sensing the foreign substance using the pixel distribution data and the foreground determination data.

According to the embodiment of the present invention, the foreign matter sensing device may compare a pixel distribution value according to a result of analyzing an image received from the camera before the motor operation, or a comparison between photographed data received from the camera before the motor operation and pre- The turbidity value of the turbid water is checked to determine the turbidity value, and the turbidity value of the received image is analyzed based on the pixel distribution value of the received image or the photographed data received from the camera for a preset time after the operation of the motor, Value can be used to generate foreground judgment data.

According to the embodiment of the present invention, when the foreign object is continuously detected for a predetermined time after it is determined that the foreign object is sensed, the foreign object sensing device may transmit the foreign object to the external device.

According to the embodiments of the present invention, by providing a method and an apparatus capable of detecting foreign matter generation based on an image received from a camera after a camera capable of photographing a rotating body portion of the pump is fixedly mounted on a pump, , It is possible to prevent the pump efficiency from being lowered due to the phenomenon of foreign matter being pinched in the rotating body (impeller) portion, and also to prevent the occurrence of a failure of the pump in advance.

1 is a view showing the overall configuration of a pump having a foreign matter detection function according to an embodiment of the present invention.
2 is an exploded perspective view illustrating a structure in which a pump and a camera are combined according to an embodiment of the present invention.
3 is a front view of a camera fixing member for fixing a camera to a pump according to an embodiment of the present invention.
4 is a bottom view of a camera fixing member for fixing a camera to a pump according to an embodiment of the present invention.
FIG. 5 is an exploded perspective view illustrating a structure for being coupled to a swash plate of a camera fixing member according to an embodiment of the present invention.
6 is a flowchart illustrating a process in which a foreign substance sensing device according to an embodiment of the present invention senses a foreign substance in a rotary part of a pump.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to provide a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, this is merely an example and the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification. The terms used in the detailed description are intended only to describe embodiments of the invention and should in no way be limiting.

Hereinafter, a pump to which foreign matter detection technology is applied will be described with reference to the accompanying drawings.

FIG. 1 is a view showing the entire construction of a pump having a foreign matter detection function according to an embodiment of the present invention. FIG. 2 is an exploded perspective view illustrating a structure in which a pump and a camera are combined according to an embodiment of the present invention, FIG. 3 is a front view of a camera fixing member for fixing a camera to a pump according to an embodiment of the present invention, and FIG. 4 is a bottom view of a camera fixing member for fixing a camera to a pump according to an embodiment of the present invention And FIG. 5 is an exploded perspective view illustrating a structure for being coupled to a swash plate of a camera fixing member according to an embodiment of the present invention.

1 to 5, the pump includes a motor housing 25 in which a motor 20 is installed, a rotating body 30 connected to a motor shaft 22 of a motor (not shown) And a casing 10 in which a rotating body 30 is housed and a wear ring 40 is disposed therein and which has a suction port 12 for sucking fluid and a discharge port 14 for discharging sucked fluid, And a camera fixing member 100 to which a camera 50 is coupled to one side of the camera body 10 and the other side of which is facing the rotation direction.

In the embodiment of the present invention, the rotating body 30 is an impeller, and a wear ring 40 may be disposed between the rotating body 30 and the inner peripheral surface of the casing 10. [ The wear ring 40 can be assembled so as to have a clearance in the inside of the casing guide cover 15 disposed in the casing 10 which rotates the casing 10. [

In the embodiment of the present invention, the camera 50 may be manufactured in the form of a watertight photographing device or an assembled module. The camera 50 may include a camera housing 51, a water mill 52, a photographing element 53, and a cable gland 54.

First, the camera housing 51 is made of a stainless steel material, and can exhibit durability and corrosion prevention performance that can protect the photographing element 53.

The camera housing 51 has a step at one end thereof and a plurality of bolt holes at the other end. The camera housing 51 is formed into a round bar shape so that the photographing element 53 can be mounted in the inner space of the camera housing 51 .

One end of the camera housing 51 having a step is seated in the third engagement hole 131 of the swash plate 130 of the camera fixing member 100 and the swash plate 130 m is welded to the third engagement hole 131 131). At this time, the extending direction of the camera housing 51 is directed toward the suction port 12 of the pump by the swash plate 130, or toward the direction in which the foreign substance introduced through the suction port 12 can be detected.

The photographing element 53 can be mounted in the inner space of the camera housing 51.

The water milling 52 is interposed between the outer surface of the photographing element 53 and the inner circumferential surface of the inner space of the camera housing 51, and can perform a watertight function.

The cable gland 54 may be coupled to the other end of the camera housing 51 and may be formed of stainless steel in the same manner as the camera housing 51 to exhibit durability and corrosion resistance.

In the embodiment of the present invention, a plurality of camera fixing members 100 are arranged in the casing 10 along the circumferential direction of the casing 10, and the camera fixing members 100 are formed parallel to the direction of the motor shaft 22, A vertical bolt hole 13 machined in a direction perpendicular to the casing bolt hole 11 at the outer peripheral surface of the inlet port of the casing 10 separated from the casing bolt hole 11 and the casing bolt hole 11 is used And may be mounted on the casing 10.

The camera fixing member 100 is stabilized in the two-point support structure through the first fixing bolt 141 and the second fixing bolt 142 respectively coupled to the casing bolt hole 11 and the vertical bolt hole 13 It can be firmly mounted on the casing 10 and can be based on the camera 50 in a state in which the shake is minimized from the influence of the outside.

For this purpose, the camera fixing member 100 according to the embodiment of the present invention may include a fixing plate 110, an extension plate 120, a swash plate 13, and the like.

The fixing plate 110 may have a first coupling hole 111 corresponding to the casing bolt hole 11 for coupling with the first fixing bolt 141.

A fixing plate 110 is disposed on one side of the extension plate 120 in the vertical direction in the camera fixing member 100. The fixing plate 110 is disposed on the other side of the extension plate 120, A photograph swash plate 130 may be disposed. That is, the swash plate 130, which is inclined by a direction that the camera 50 faces toward the suction port 12 or a direction that allows the foreign substance to flow through the suction port 12 to be detected, may be disposed.

   The extension plate 120 is connected to the fixing plate 110 at a right angle with respect to the fixing plate 110 and may be formed to extend in parallel with the extending direction of the casing 10 or the extending direction of the motor shaft 22. [ have. The extension plate 120 may be provided with a second engagement slot 121 corresponding to the vertical bolt hole 13 for engagement with the second fixing bolt 142.

The swash plate 130 is connected to an end of the extension plate 120 and may include a third coupling hole 131 for mounting the camera 50. For example, one end of the stepped shape of the camera housing 51 of the camera 50 is fitted into the third coupling hole 131, and the camera housing can be fixed by welding.

The photographing element 53 photographs the foreign matter flow of the pump through the stepped central opening at one end of the stepped shape of the camera housing 51 and the third coupling opening 131 and displays the photographed data May be transmitted to the foreign substance sensing apparatus 200.

The foreign substance sensing apparatus 200 according to an embodiment of the present invention may be connected to the camera 50 in a wired or wireless manner to receive photographed data in real time by the camera 50. [

In addition, the foreign substance sensing apparatus 200 can perform the foreign substance sensing by analyzing the photographed data received in conjunction with the operation of a motor (not shown). Specifically, the foreign substance sensing apparatus 200 buffers photographed data received from the camera 50 in a stopped state of the rotating body 30 for a predetermined time before the operation of the motor, and then stops the rotation of the rotating body 30 The foreground determination data is generated by performing an image analysis on the state, and foreign matter can be detected from the photographic data received from the camera 50 after the operation of the motor by using the foreground determination data.

In the embodiment of the present invention, the foreground determination data may be the pixel distribution value in the photographed data received in the stopped state of the rotating body 30. [

Meanwhile, in the embodiment of the present invention, the foreign substance sensing apparatus 200 calculates the turbidity value in the water installed in the pump using the photographing data provided from the camera 50, gives the calculated turbidity value as a weight value, 50 to calculate the pixel distribution value which is the foreground determination data. Specifically, the foreign substance sensing apparatus 200 can calculate the turbidity value through comparison analysis between the basic image, that is, the data taken without the floating body, and the image data received from the camera 50 before the motor operation.

In the embodiment of the present invention, the foreign substance detection apparatus 200 can receive the turbidity value through interlocking with the turbidity detection sensor 400, and calculates the pixel distribution value that is the foreground determination data using the provided turbidity value . In this case, the turbidity detection sensor 400 is installed on a specific portion of the swash plate 130 of the camera fixing member 100, and the light is incident on the water to optically measure the degree of scattering by the non- And may be provided to the foreign substance sensing apparatus 200.

For this, in the embodiment of the present invention, the foreign substance detection apparatus 200 may be connected to the turbidity detection sensor 400 wirelessly, and may receive turbidity values that are scattered by radio waves.

Meanwhile, in the embodiment of the present invention, the foreign substance sensing apparatus 200 may generate foreground determining parameters based on the photographic data received from the camera 50 for a predetermined time after the motor is driven. That is, the foreign substance sensing apparatus 200 may control the foreign substance sensing apparatus 200 to rotate the rotary body 30 for a predetermined time after the motor is driven, for example, at a predetermined speed (I.e., a speed necessary for discharging through the camera 50), the camera 50 may generate the foreground determination data by analyzing the captured data.

The foreign substance sensing apparatus 200 may analyze the photographed data received from the camera 50 using the foreground determination data to determine whether foreign substances are present in the rotational body 30. Specifically, the foreign substance sensing apparatus 200 classifies the photographed data into the foreground portion and the background portion using the foreground determination data from the photographic data received from the camera 50, checks whether the foreground portion exists, It is possible to judge whether or not a foreign substance is present in a part of the body.

More specifically, the foreign substance sensing apparatus 200 checks whether or not the pixel distribution values of the foreground determination data match the pixel distribution values of the photographic data received from the camera 50, within a predetermined range, It is possible to judge whether or not a foreign substance exists in the part of the body 30.

Meanwhile, in the embodiment of the present invention, the foreign substance sensing apparatus 200 constructs a software filter using foreground determination data, and then filters photographed data received from the camera 50 using a filter, It is possible to judge whether or not foreign matter exists in the rotating body 30 portion. Specifically, the foreign substance sensing apparatus 200 removes the pixel distribution value, which is data for foreground judgment, from the pixel distribution of the photographed data received from the camera 50, and then uses the resultant value to determine whether foreign substances exist in the rotational body 30 It can be judged.

The foreign substance sensing apparatus 200 determines whether or not the foreign substance is sensed for a predetermined time after it is determined that the foreign substance is sensed. If the foreign matter sensing state is maintained even after a predetermined time has elapsed, And notify the administrator. To this end, the foreign substance sensing apparatus 200 includes a counter 210, and can determine whether the foreign matter sensing state is maintained for a preset time by changing the value of the counter 210.

A process of detecting a foreign substance by the foreign substance sensing apparatus 200 will be described with reference to FIG.

FIG. 6 is a flowchart illustrating a process in which the foreign substance sensing apparatus 200 according to the embodiment of the present invention senses foreign substances on the rotating body 30.

As shown in FIG. 6, the foreign substance sensing apparatus 200 generates foreground determination data based on the photographic data received from the camera 50 (S500).

First, the foreign substance sensing apparatus 200 acquires the photographed data received from the camera 50 before the motor operation and the previously stored basic data (the image photographed in the state in which there is no floating body) , The turbidity value is calculated by checking the degree of suspended matter, and the background pixel distribution value, which is the foreground judgment data, can be generated based on the calculated turbidity value.

In addition, the foreign substance sensing apparatus 200 can generate foreground determination data using the photographic data received from the camera 50 before the motor operation. Specifically, the foreign substance sensing apparatus 200 may analyze the distribution of the pixel values in the photographing data received from the camera 50 before the motor operation, and generate foreground determination data having a distribution of background pixel values.

The foreign substance sensing apparatus 200 can generate foreground determination data by using the photographic data received from the camera 50 before the motor operation and the photographic data received from the camera 50 for a predetermined period of time after the motor operates have. Specifically, the foreign substance sensing apparatus 200 checks the degree of floating matter change by comparing the photographing data received from the camera 50 before the motor operation with the photographing data received from the camera 50 for a predetermined time, And generates a background pixel distribution value which is data for foreground judgment based on the calculated turbidity value.

In addition, the foreign substance sensing apparatus 200 can generate foreground determination data using the photographic data received from the camera 50 for a predetermined period of time after the motor operates. Specifically, the foreign substance sensing apparatus 200 may analyze the distribution of pixel values in the photographic data received from the camera 50 for a predetermined period of time after the motor operates to generate background judgment data composed of distributions of background pixel values have.

The foreign substance sensing apparatus 200 may generate foreground determination data based on the turbidity value received from the turbidity detection sensor 400 before or during the motor operation.

Then, the foreign substance sensing apparatus 200 sets the value of the counter 210 to "0" (S502) as the foreground determination data is generated, To generate pixel distribution data (S504).

Then, the foreign substance sensing apparatus 200 determines whether it is within a predetermined range through comparison between the pixel distribution data and the background pixel distribution value, which is foreground judgment data (S506).

If the result of the determination in S506 is negative, the foreign substance sensing apparatus 200 determines that a foreign substance exists in the rotating body 30, increases the value of the counter 210 by 1 (S508) Quot; n "is reached (S510).

If it is determined in step S510 that the value of the counter 210 is "n ", the foreign substance sensing apparatus 200 makes a final determination that a foreign substance exists in the rotator 30 and provides the foreign body to the external device 300 If the value of the counter 210 is not "n ", the foreign substance sensing apparatus 200 proceeds to step S504 to perform the subsequent steps.

On the other hand, if it is determined as a result of the determination in S506, the foreign substance sensing apparatus 200 proceeds to S502 and performs the subsequent steps.

The steps as described above can be performed until the driving of the pump is stopped, that is, the operation of the motor is turned off.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

It is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. .

10: Casing
30: rotating body
40: Wear ring
50: Camera
100: camera fixing member
200: foreign substance detecting device
210: Counter
300: External device
400: turbidity sensor

Claims (8)

delete delete And a casing having a motor housing in which a motor is installed, a rotating body connected to the motor shaft of the motor and rotated, and a discharge port for discharging the sucked fluid and a suction port for sucking the fluid, And a camera fixing member coupled to the camera for viewing the direction of the rotating body, the method comprising the steps of:
Generating thumbnail data for shooting data received from the camera in a foreign matter sensing device connected to the camera,
Generating pixel data by analyzing photographed data received from the camera after generating the foreground determination data;
Determining whether the foreground determination data and the pixel distribution data are within a predetermined range,
And determining that foreign matter is detected in the direction of the rotating body when the result of the determination is no match,
Wherein the step of generating the foreground determination data comprises:
Calculating a turbidity value by checking the degree of suspended matter in the water by comparing the photographed data received from the camera before the motor operation with pre-stored basic data,
And generating foreground determination data that is a pixel distribution value of the received image based on the turbidity value.
delete The method of claim 3,
The foreign substance sensing method may include:
Increasing the counter value by "1" after determining that the foreign substance is detected;
Determining whether the counter value is a predetermined counter value "n"
If the counter value is not the predetermined counter value "n ", the process proceeds to the step of generating the pixel distribution data, and if it is determined that the counter value is" n " And notifying the manager of the foreign matter.
delete 1. A pump comprising: a motor housing having a motor therein; a rotating body connected to the motor shaft of the motor to rotate; and a casing having a suction port for sucking the fluid and a discharge port for discharging the sucked fluid,
A camera coupled to an outer circumferential surface of an inlet rim of the casing and coupled to the casing, a fixing plate formed on one side of the extending plate, and a camera, wherein the camera is formed on the other side of the extending plate, A camera fixing member composed of an inclined plate formed to be inclined in a downward slope direction with respect to the extension plate so as to be directed in a direction capable of sensing foreign matter flowing through the camera fixing member,
And a controller for generating foreground determination data based on the photographic data received from the camera coupled to the swash plate, analyzing the photographic data received from the camera, and detecting foreign matter by using the pixel distribution data and the foreground determination data Device,
The foreign substance sensing device includes:
The turbidity value is calculated by comparing the pixel distribution value according to the result of analyzing the image received from the camera before the motor operation or the photographing data received from the camera before the motor operation and the stored basic data, Wherein the turbidimetric data is used to analyze the photographic data received from the camera for a predetermined period of time after the operation of the motor or a pixel distribution value of the received image based on the turbidity value to generate foreground determination data using the pixel distribution value.
8. The method of claim 7,
The foreign substance sensing device includes:
And when the foreign object is continuously detected for a predetermined time after it is determined that the foreign object is detected, the pump is transmitted to the external device.

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