CN108204800B - Automatic monitoring device and method for differential settlement of power equipment foundation - Google Patents
Automatic monitoring device and method for differential settlement of power equipment foundation Download PDFInfo
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- CN108204800B CN108204800B CN201810025225.0A CN201810025225A CN108204800B CN 108204800 B CN108204800 B CN 108204800B CN 201810025225 A CN201810025225 A CN 201810025225A CN 108204800 B CN108204800 B CN 108204800B
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- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points
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Abstract
The invention discloses an automatic monitoring device and method for non-uniform settlement of a power equipment foundation, wherein the device comprises a foundation communicating pipe and a data processing platform, the foundation communicating pipe comprises a central pipe and three branch pipes, and one end of each branch pipe far away from the central pipe is provided with a settlement data acquisition device; the data processing platform comprises a bracket, a controller, a memory and a communication module communicated with a computer, wherein the input end of the controller is connected with a data processing circuit, and the camera is connected with the data processing circuit; the method comprises the following steps: 1. installing and adjusting an automatic monitoring device; 2. acquiring and transmitting a measuring tube liquid level height image; 3. image processing is carried out to obtain liquid level data of a measuring tube; 4. automatic monitoring of differential settlement of the power equipment foundation; 5. and (5) early warning of differential settlement of the power equipment foundation. According to the invention, by using the principle that the height of the liquid level of the measuring tube is equal, the change of the height of the liquid level of the measuring tube is obtained by using the camera, and the observation data of the differential settlement of the foundation of the power equipment can be accurately monitored in real time.
Description
Technical Field
The invention belongs to the technical field of foundation settlement of power equipment, and particularly relates to an automatic monitoring device and method for non-uniform settlement of a foundation of power equipment.
Background
In the construction and operation process of the electric power facility, the sedimentation condition of the electric power equipment foundation is directly related to the safety in the operation process of the electric power equipment, wherein the uneven sedimentation is particularly harmful to the operation of the electric power equipment, and therefore the uneven sedimentation of the foundation is required to be monitored and treated in real time. The existing foundation settlement observation method is a traditional precise leveling measurement, has higher requirements on the stability of sight line, sight distance and instrument erection, often needs to be carried out for multiple times in the measurement process, has large work load and low efficiency, and can not provide real-time continuous monitoring. Meanwhile, the existing inclination sensor has higher sensitivity, but the contact area between the sensing device and the foundation is generally small, so that the inclination measurement error is amplified by tens of times due to the influence of external environment in the field operation process of the power equipment when the inclination monitoring is performed, and the application of the inclination sensor in the foundation settlement monitoring of the power equipment is restricted. Therefore, an automatic monitoring device and method for the differential settlement of the power equipment foundation, which are low in cost, high in precision, simple in structure and convenient to operate, are lacking at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the automatic monitoring device for the differential settlement of the power equipment foundation, which is novel and reasonable in design, can set the length of a basic communicating pipe according to the size of the power equipment foundation, acquires the change of the liquid level of a measuring pipe by using a camera according to the principle that the liquid level of the measuring pipe is equal, can accurately acquire the high-precision differential settlement observation data of the power equipment foundation in real time and performs safety pre-warning, and is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the following technical scheme: automatic monitoring device of power equipment basis differential settlement, its characterized in that: the device comprises a basic communicating pipe and a data processing platform, wherein the basic communicating pipe is arranged on a power equipment foundation, the basic communicating pipe comprises a central pipe and three branch pipes which are communicated with the central pipe and are equal in length, an included angle between any two of the three branch pipes is 120 degrees, the central pipe is communicated with a liquid storage tank for storing colored liquid through a hose, one end of the branch pipe, which is far away from the central pipe, is provided with a sedimentation data acquisition device, the sedimentation data acquisition device comprises a protective cover, a measuring pipe and a camera, which are arranged in the protective cover, the measuring pipe is an L-shaped transparent measuring pipe, one side, which faces the camera, of the L-shaped transparent measuring pipe is provided with scales, the L-shaped transparent measuring pipe is communicated with one end, which is far away from the central pipe, of the branch pipe, and the top end of the L-shaped transparent measuring pipe is provided with a through hole; the data processing platform comprises a bracket and an electronic circuit board arranged on the bracket, wherein a controller, a memory and a communication module are integrated on the electronic circuit board, the memory is connected with the controller, the communication module is used for communication with a computer, the input end of the controller is connected with a data processing circuit, and the camera is connected with the data processing circuit through a camera connecting wire.
Foretell automatic monitoring device of power equipment basis differential settlement, its characterized in that: the L-shaped transparent measuring tube is connected with the branch tube through an electric flow regulating valve, the electric flow regulating valve is controlled by the controller, and the electric flow regulating valve is fixed on the power equipment foundation.
Foretell automatic monitoring device of power equipment basis differential settlement, its characterized in that: the colored liquid is colored antifreezing liquid.
Foretell automatic monitoring device of power equipment basis differential settlement, its characterized in that: and the hose is provided with a water pump, and the water pump is controlled by the controller.
Foretell automatic monitoring device of power equipment basis differential settlement, its characterized in that: the protective cover is a heat-insulating waterproof transparent protective cover.
Foretell automatic monitoring device of power equipment basis differential settlement, its characterized in that: the communication module is a wired communication module or a wireless communication module.
Meanwhile, the invention also discloses a method for automatically monitoring the differential settlement of the foundation of the power equipment, which has simple steps and reasonable design and is characterized by comprising the following steps:
step one, mounting and adjusting an automatic monitoring device, wherein the process is as follows:
step 101, determining the central position of a power equipment foundation plane, setting the central position of a central tube at the central position of the power equipment foundation plane, determining the initial plane level of the power equipment foundation, and adjusting the vertical measuring tube of the L-shaped transparent measuring tube to be vertical to the initial plane of the power equipment foundation;
102, connecting an L-shaped transparent measuring pipe with a branch pipe through an electric flow regulating valve, installing a water pump on a hose, wherein the water pump and the electric flow regulating valve are controlled by a controller, the electric flow regulating valve is fixed on the basis of electric equipment, the water pump and the electric flow regulating valve are controlled to be opened by the controller, colored liquid in a liquid storage tank is pumped into a central pipe by the water pump, the colored liquid flows into each branch pipe from the central pipe and then flows into the measuring pipes, and the liquid level in the three measuring pipes is kept equal;
step 103, setting three branch pipes which are a branch pipe A, a branch pipe B and a branch pipe C by a computer, adjusting the branch pipe A to point to the north direction, and sequencing the branch pipe A, the branch pipe B and the branch pipe C clockwise;
the computer sets three measuring pipes which are respectively a measuring pipe A, a measuring pipe B and a measuring pipe C, wherein the measuring pipe A is communicated with a branch pipe A, the measuring pipe B is communicated with a branch pipe B, and the measuring pipe C is communicated with a branch pipe C;
step two, acquiring and transmitting a measuring tube liquid level height image: taking the time T as a period, photographing the measuring tube by the camera, acquiring measuring tube liquid level images at different moments, transmitting the measuring tube liquid level images at different moments to the controller and storing the measuring tube liquid level images in the memory, and transmitting the measuring tube liquid level images at different moments stored in the memory to the computer by the controller through the communication module by taking photographing time as a sequence;
step three, image processing is carried out to obtain the liquid level height data of the measuring tube: the computer processes the measuring tube liquid level images at different moments in sequence of the time of the received measuring tube liquid level images, and the processing methods of the measuring tube liquid level images at different moments are the same in the image processing process;
when any one measuring tube liquid level image is processed, the process is as follows:
step 301, gray scale processing is carried out on the liquid level image of the measuring tube to obtain a gray scale image of the liquid level of the measuring tube;
step 302, filtering the gray level image of the liquid level of the measuring tube by adopting a rapid median filtering algorithm to obtain a gray level denoising image of the liquid level of the measuring tube;
step 303, processing the gray level denoising image of the liquid level of the measuring tube by using an edge detection method, extracting the boundary position of the liquid level in the gray level denoising image of the liquid level of the measuring tube, identifying scale data at the boundary position of the liquid level, and obtaining the reading of the liquid level of the measuring tube;
step four, automatic monitoring of non-uniform settlement of the power equipment foundation, wherein the process is as follows:
step 401, constructing a three-dimensional space coordinate system: the central position of a plane where the power equipment foundation is located is taken as a coordinate origin O, the north direction pointed by the branch pipe A is taken as a Y-axis positive direction, the direction which is horizontally perpendicular to the Y-axis and pointed by the branch pipe C to the branch pipe B is taken as an X-axis positive direction, a three-dimensional space coordinate system O-XYZ is established by taking the direction which is vertically perpendicular to the Y-axis and vertically upwards from the plane where the power equipment foundation is located as a Z-axis positive direction, and the Y-axis passes through the central axis of the branch pipe A;
step 402,Calculating the change Z of the liquid level of the measuring tube A during the ith observation Ai Level change value Z of measuring tube B Bi And a liquid level change value Z of the measurement pipe C Ci Wherein i is the number of observations and i is a positive integer not less than 1, Z a0 To measure the initial level reading of A, Z b0 To measure the initial level reading of B, Z c0 To measure the initial level reading of the tube C, Z ai For the level observation reading of the measuring tube A at the ith observation, Z bi For the level observation reading of the measuring tube B at the ith observation, Z ci The liquid level observation reading of the measuring tube C in the ith observation is obtained;
step 403, establishing a measuring tube liquid level plane equation: the computer measures the liquid level height points (0, 2h, Z) of the pipe A according to the ith observation Ai ) Measuring tube B liquid level point at the ith observation And the liquid level height point of the measuring tube C at the time of the ith observation +.>The measurement tube liquid level plane equation in the ith observation is established as follows:wherein 2h is the length of the branch pipe;
step 404, according to the measuring tube liquid level plane equation in the ith observationAnd the level OS equation z=0, determining the measuring tube fluid at the ith observationIntersection of plane equation with horizontal plane OS +.>According to the intersection line of the measuring tube liquid level plane equation and the horizontal plane OS in the ith observation and the inclined line of the power equipment foundation in the ith observation, the inclined line of the power equipment foundation in the ith observation is obtained
Calculating a circle x formed by the liquid level point of the measuring pipe A, the liquid level point of the measuring pipe B and the liquid level point of the measuring pipe C 2 +y 2 ＝4h 2 An intersection with the inclined line of the power equipment foundation at the i-th observation, to obtain a first intersection (x 1 ,y 1 ) And a second intersection point (x 2 ,y 2 ) The first intersection point (x 1 ,y 1 ) And a second intersection point (x 2 ,y 2 ) Plane equation of liquid level of measuring tube respectively brought into ith observationObtaining a first liquid level change value z 1 And a second liquid level change value z 2 Wherein |z 1 |＝|z 2 I (I); according to the formula->Calculating an inclination angle beta of the power equipment foundation;
step 405, determining a tilt azimuth of the power equipment foundation: tilting line of power equipment foundation at ith observationDetermining the inclination base azimuth angle of the power installation base at the ith observation>Wherein alpha is less than or equal to 0 DEG 0 ＜180°；
According to formula Z min ＝min(z 1 ,z 2 ) Determining a first level change value z 1 And a second liquid level change value z 2 And utilize Z min Determining its corresponding X coordinate X low Wherein, when z 1 ＞z 2 When Z is min ＝z 2 ，x low ＝x 2 The method comprises the steps of carrying out a first treatment on the surface of the When z 1 ＜z 2 When Z is min ＝z 1 ，x low ＝x 1 ；
When x is low At > 0, the inclination azimuth angle α=α of the power equipment foundation at the ith observation 0 ；
When x is low When < 0, the inclination azimuth angle alpha=alpha of the power equipment foundation at the ith observation 0 +180°；
When x is low ＝0，y low At > 0, the inclination azimuth angle α=0° of the power equipment foundation at the i-th observation;
when x is low ＝0，y low When < 0, the inclination azimuth angle alpha of the power equipment foundation at the ith observation time is=180°;
wherein, the inclination azimuth angle alpha of the power equipment foundation in the ith observation is an included angle with the north direction, y low To utilize Z min Determining the corresponding Y coordinate, when z 1 ＞z 2 When Z is min ＝z 2 ，y low ＝y 2 The method comprises the steps of carrying out a first treatment on the surface of the When z 1 ＜z 2 When Z is min ＝z 1 ，y low ＝y 1 ；
Step 406, according to the formula Δh= 2|z 1 cos beta is, calculating the relative sedimentation delta H of the power equipment foundation;
fifthly, early warning of differential settlement of the power equipment foundation: and pre-storing an inclination angle threshold value and a relative settlement amount threshold value of the power equipment foundation in the computer, and sending an early warning signal by the computer when the inclination angle beta of the power equipment foundation is larger than the inclination angle threshold value of the power equipment foundation or the relative settlement delta H of the power equipment foundation is larger than the relative settlement amount threshold value of the power equipment foundation.
The method is characterized in that: in step 102, the electric flow regulating valve installed on the measuring tube is used for regulating the same amount of colored liquid flowing into the measuring tube, and the liquid level in the three measuring tubes is kept equal.
Compared with the prior art, the invention has the following advantages:
1. the automatic monitoring device adopted by the invention can set the length of the branch pipe according to the area size of the power equipment foundation, so that the foundation communicating pipe extends over most of the area in the power equipment foundation, the inclination precision of the power equipment foundation is high, the problem that the inclination measurement error is amplified due to small contact area between the inclination sensor and the power equipment foundation is avoided, and the popularization and the use are convenient.
2. According to the invention, an automatic monitoring device is adopted, each measuring tube is provided with a camera, a group of measuring tubes and the cameras are arranged in the same protective cover, the principle that the liquid level of the measuring tubes is equal in height is reliable and stable, the camera is utilized to acquire the liquid level change of the measuring tubes, the high-precision differential settlement observation data of the electric equipment foundation can be accurately obtained in real time, and the computer is utilized to perform safety early warning and confirming, so that the use effect is good.
3. The invention adopts an automatic monitoring method, has simple steps, provides reference convenience for subsequent calculation by adjusting the branch pipe A, the branch pipe B and the branch pipe C according to clockwise sequence, extracts the liquid level height data of the measuring pipe by utilizing an image processing technology, automatically monitors the inclination angle, the inclination direction and the relative settlement in the non-uniform settlement of the foundation of the electric power equipment, compares the inclination angle and the relative settlement measured in real time with an inclination angle threshold value and a relative settlement threshold value, performs safety early warning in real time, and is convenient to popularize and use.
In conclusion, the invention has novel and reasonable design, can set the length of the basic communicating pipe according to the basic size of the power equipment, and can acquire the change of the liquid level of the measuring pipe by utilizing the camera according to the principle that the liquid level of the measuring pipe is equal, so that the high-precision non-uniform settlement observation data of the basic of the power equipment can be acquired accurately in real time and can be used for safety early warning and ensuring, and the popularization and the use are facilitated.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a top view of the structure of the automatic monitoring device of the present invention.
Fig. 2 is a schematic diagram of the installation relationship of the sedimentation data acquisition device on the basis of the electric power equipment in the automatic monitoring device.
FIG. 3 is a schematic diagram showing the connection relationship between a measuring pipe and a branch pipe in the automatic monitoring device of the present invention.
Fig. 4 is a schematic block diagram of the automatic monitoring device of the present invention.
FIG. 5 is a schematic diagram showing the top view positional relationship of the branch A, the branch B and the branch C in the three-dimensional space coordinate system O-XYZ in the automatic monitoring method of the present invention.
Fig. 6 is a schematic diagram showing the geometrical change of the relative sedimentation Δh of the power equipment foundation in the automatic monitoring method of the present invention.
FIG. 7 is a flow chart of the method of the present invention.
Reference numerals illustrate:
1-a power equipment foundation; 2-1, a central tube; 2-2 branch pipes;
3-sedimentation data acquisition means; 3-1-protecting cover; 3-2-measuring tube;
3-camera; 3-4, connecting lines of cameras; 3-5-through holes;
4-a bracket; 5-hose; 6, a liquid storage tank;
7-an electric flow regulating valve; 8-a data processing circuit; 9-a communication module;
10-a memory; 11-a computer; 12-controller.
Detailed Description
As shown in fig. 1 to 4, the automatic monitoring device for the differential settlement of the foundation of the electric power equipment comprises a foundation communicating pipe and a data processing platform, wherein the foundation communicating pipe is arranged on the foundation 1 of the electric power equipment and comprises a central pipe 2-1 and three branch pipes 2-2 which are communicated with the central pipe 2-1 and have equal length, the included angle between any two branch pipes 2-2 in the three branch pipes 2-2 is 120 degrees, the central pipe 2-1 is communicated with a liquid storage tank 6 for storing colored liquid through a hose 5, one end of the branch pipe 2-2, which is far away from the central pipe 2-1, is provided with a settlement data acquisition device 3, the settlement data acquisition device 3 comprises a protective cover 3-1, a measuring pipe 3-2 and a camera 3-3 which are all arranged in the protective cover 3-1, the measuring pipe 3-2 is an L-shaped transparent measuring pipe, one side of the L-shaped transparent measuring pipe, which faces the camera 3-3, is provided with scales, the L-shaped transparent measuring pipe is communicated with one end of the branch pipe 2, which is far away from the central pipe 2-1, and the top end of the L-shaped transparent measuring pipe 3-5 is provided with a through hole; the data processing platform comprises a bracket 4 and an electronic circuit board arranged on the bracket 4, wherein a controller 12, a memory 10 and a communication module 9 are integrated on the electronic circuit board, the memory 10 and the communication module 9 are connected with the controller 12, the communication module 9 is used for communicating with a computer 11, the input end of the controller 12 is connected with a data processing circuit 8, and a camera 3-3 is connected with the data processing circuit 8 through a camera connecting wire 3-4.
It should be noted that, according to the area size of the power equipment foundation 1, a foundation communicating pipe with a suitable size is installed on the power equipment foundation 1, so that the foundation communicating pipe extends over most of the area of the power equipment foundation 1, the inclination precision of the power equipment foundation 1 is high, the situation that an inclination sensor is used to be in contact with the power equipment foundation 1 is avoided, so that an inclination measurement error is amplified is avoided, the foundation communicating pipe installed on the power equipment foundation 1 provides an infusion pipeline for the measuring pipe 3-2, three branch pipes 2-2 in the foundation communicating pipe are equal in length, so that the central pipe 2-1 is convenient to synchronously supply liquid to the three branch pipes 2-2, and then synchronously supply liquid to the three measuring pipe 3-2, the included angle between any two branch pipes 2-2 in the three branch pipes 2-2 is 120 degrees, so that the three branch pipes 2-2 are uniformly distributed on the power equipment foundation 1, and in practical use, and a plane of the preferable power equipment foundation 1 is circular; the protection cover 3-1 is arranged in the sedimentation data acquisition device 3, so that the purpose of preventing liquid in the measuring tube 3-2 from expanding with heat and shrinking with cold is achieved, the purpose of preventing the measuring tube 3-2 and the camera 3-3 from being interfered by dust, the purpose of avoiding environmental interference and improving the measurement precision is achieved, and the purpose of preventing the liquid in the measuring tube 3-2 from evaporating too fast is achieved; the settlement data acquisition device 3 is provided with the measuring tube 3-2, the measuring tube 3-2 is an L-shaped transparent measuring tube, the transverse measuring tube of the L-shaped transparent measuring tube is convenient for connecting the measuring tube 3-2 with the branch tube 2, the vertical measuring tube of the L-shaped transparent measuring tube is convenient for observing the liquid level position in the measuring tube 3-2, in practical use, the scale is arranged on the vertical measuring tube of the L-shaped transparent measuring tube, the camera 3-3 is convenient for shooting, the through hole 3-5 is arranged at the top end of the vertical measuring tube of the L-shaped transparent measuring tube so as to be convenient for balancing the atmospheric pressure, the measuring tube 3-2 is provided with the camera 3-3 in each protecting cover 3-1, and the liquid level height data of the measuring tube 3-2 corresponding to the camera 3-3 is reliably and stably read;
in actual use, the bracket 4 in the data processing platform is arranged right above the central tube 2-1, so that an electronic circuit board is conveniently placed, and the controller 12 is integrated on the electronic circuit board to simultaneously acquire the image information shot by the three cameras 3-3, and as the three branch tubes 2-2 are equal in length and the three camera connecting wires 3-4 equipped with the three cameras 3-3 are equal in length, the synchronous transmission of data is facilitated, and the error influence caused by communication time difference is reduced.
In this embodiment, the L-shaped transparent measuring tube is connected with the branch tube 2-2 through an electric flow regulating valve 7, the electric flow regulating valve 7 is controlled by a controller 12, and the electric flow regulating valve 7 is fixed on the electric power equipment foundation 1.
It should be noted that, the L-shaped transparent measuring tube is connected with the branch tube 2-2 through the electric flow regulating valve 7, the electric flow regulating valve 7 has the function of controlling the flow of liquid or blocking the flow of liquid on the one hand, on the other hand, has the function of recording the flow of liquid flowing through, in practical use, the evaporation rate of the liquid in the three L-shaped transparent measuring tubes is possibly different, the quantity of the liquid to be replenished in each L-shaped transparent measuring tube is inconsistent, and the electric flow regulating valve 7 is arranged for each L-shaped transparent measuring tube, so that the liquid demand quantity in each L-shaped transparent measuring tube can be flexibly regulated, and the use effect is good.
In this embodiment, the colored liquid is a colored antifreeze liquid.
It should be noted that, when flushing into colored liquid in the transparent survey pipe of L shape is convenient for camera 3-3 obtain liquid level height data, distinguish the liquid level boundary, the later stage's of being convenient for image processing, because power equipment often sets up in the field operation, field environment abominable, the difference in temperature is big, and colored liquid adopts colored antifreeze liquid, avoids liquid to freeze, influences measured data.
In this embodiment, a water pump is mounted on the hose 5, and the water pump is controlled by the controller 12.
In this embodiment, the protective cover 3-1 is a heat-insulating waterproof transparent protective cover.
It should be noted that, the purpose of the heat-insulating waterproof transparent protection cover 3-1 is to prevent liquid from expanding with heat and contracting with cold, to avoid interference caused by weather environment and sedimentation data acquisition device, to avoid interference of dust to the camera 3-3, and to ensure good light of the camera 3-3, so that the camera 3-3 can shoot images to acquire liquid level.
In this embodiment, the communication module 9 is a wired communication module or a wireless communication module.
In actual use, the wireless communication module is preferably adopted by the communication module 9, so that the measuring personnel can conveniently monitor the power equipment foundation 1 remotely, the waste of manpower, material resources and financial resources is reduced, and the use effect is good.
A method for automatic monitoring of differential settlement of a power plant foundation as shown in fig. 5 to 7, comprising the steps of:
step one, mounting and adjusting an automatic monitoring device, wherein the process is as follows:
step 101, determining the central position of the plane of the power equipment foundation 1, setting the central position of a central tube 2-1 at the central position of the plane of the power equipment foundation 1, determining the initial plane level of the power equipment foundation 1, and adjusting the vertical measuring tube of the L-shaped transparent measuring tube to be vertical to the initial plane of the power equipment foundation 1;
the central position of the plane of the power equipment foundation 1 and the central position of the central tube 2-1 are determined, so that the installation of an automatic monitoring device is facilitated, and the measurement precision is improved.
102, connecting an L-shaped transparent measuring tube with branch tubes 2-2 through an electric flow regulating valve 7, installing a water pump on a hose 5, controlling the water pump and the electric flow regulating valve 7 by a controller 12, fixing the electric flow regulating valve 7 on an electric equipment foundation 1, controlling the water pump and the electric flow regulating valve 7 to be opened by the controller 12, pumping colored liquid in a liquid storage tank 6 into a central tube 2-1 by the water pump, enabling the colored liquid to flow into each branch tube 2-2 from the central tube 2-1, further flowing into a measuring tube 3-2, and keeping the liquid level in three measuring tubes 3-2 equal;
in this embodiment, in step 102, the electric flow rate adjusting valve 7 mounted on the measuring pipe 3-2 is used to adjust the amount of the colored liquid flowing into the measuring pipe 3-2, and the liquid level in the three measuring pipes 3-2 is maintained at the same level.
In practical use, the length and the pipe diameter size of each measuring pipe 3-2 are the same, and the liquid level in the three measuring pipes 3-2 can be adjusted by adjusting the same amount of colored liquid flowing into the measuring pipe 3-2 under the initial condition.
Step 103, the computer 11 sets three branch pipes 2-2 which are respectively a branch pipe A, a branch pipe B and a branch pipe C, adjusts the branch pipe A to point to the north direction, and sequences the branch pipe A, the branch pipe B and the branch pipe C clockwise;
in actual use, the branch pipes A, B and C are adjusted to be ordered clockwise, the branch pipe A is adjusted to point to the north direction, reference convenience is provided for subsequent calculation, and calculation is simplified.
The computer 11 sets three measuring pipes 3-2 which are respectively a measuring pipe A, a measuring pipe B and a measuring pipe C, wherein the measuring pipe A is communicated with a branch pipe A, the measuring pipe B is communicated with a branch pipe B, and the measuring pipe C is communicated with a branch pipe C;
step two, acquiring and transmitting a measuring tube liquid level height image: taking a time T as a period, photographing the measuring tube 3-2 by the camera 3-3, acquiring measuring tube liquid level images at different moments, transmitting the measuring tube liquid level images at different moments to the controller 12 and storing the measuring tube liquid level images in the memory 10, and transmitting the measuring tube liquid level images at different moments stored in the memory 10 to the computer 11 by the controller 12 through the communication module 9 in order of photographing time;
step three, image processing is carried out to obtain the liquid level height data of the measuring tube: the computer 11 processes the measuring tube liquid level images at different moments in sequence of the time of the received measuring tube liquid level images, and the processing methods of the measuring tube liquid level images at different moments are the same in the image processing process;
when any one measuring tube liquid level image is processed, the process is as follows:
step 301, gray scale processing is carried out on the liquid level image of the measuring tube to obtain a gray scale image of the liquid level of the measuring tube;
step 302, filtering the gray level image of the liquid level of the measuring tube by adopting a rapid median filtering algorithm to obtain a gray level denoising image of the liquid level of the measuring tube;
step 303, processing the gray level denoising image of the liquid level of the measuring tube by using an edge detection method, extracting the boundary position of the liquid level in the gray level denoising image of the liquid level of the measuring tube, identifying scale data at the boundary position of the liquid level, and obtaining the reading of the liquid level of the measuring tube;
the color of the colored liquid in the measuring tube 3-2 is different from the color of the measuring tube 3-2, the liquid level boundary is clear after the gray processing of the image shot by the camera 3-3, and the liquid level boundary extraction efficiency is high by using the edge detection method.
Step four, automatic monitoring of non-uniform settlement of the power equipment foundation, wherein the process is as follows:
step 401, constructing a three-dimensional space coordinate system: the central position of the plane where the power equipment foundation 1 is located is taken as a coordinate origin O, the north direction pointed by the branch pipe A is taken as a Y-axis positive direction, the direction pointed by the branch pipe C is taken as an X-axis positive direction, the direction perpendicular to the Y-axis and vertically upwards from the plane where the power equipment foundation 1 is located is taken as a Z-axis positive direction, a three-dimensional space coordinate system O-XYZ is established, and the Y-axis passes through the central axis of the branch pipe A;
step 402,Calculating the change Z of the liquid level of the measuring tube A during the ith observation Ai Level change value Z of measuring tube B Bi And measuring the liquid level of the tube CDegree variation value Z Ci Wherein i is the number of observations and i is a positive integer not less than 1, Z a0 To measure the initial level reading of A, Z b0 To measure the initial level reading of B, Z c0 To measure the initial level reading of the tube C, Z ai For the level observation reading of the measuring tube A at the ith observation, Z bi For the level observation reading of the measuring tube B at the ith observation, Z ci The liquid level observation reading of the measuring tube C in the ith observation is obtained;
step 403, establishing a measuring tube liquid level plane equation: the computer 11 measures the liquid level points (0, 2h, Z) of the pipe A based on the ith observation Ai ) Measuring tube B liquid level point at the ith observationAnd the liquid level height point of the measuring tube C at the time of the ith observation +.>The measurement tube liquid level plane equation in the ith observation is established as follows:wherein 2h is the length of the branch pipe 2-2;
step 404, according to the measuring tube liquid level plane equation in the ith observationAnd level OS equation z=0, determining the intersection line +_of the measuring tube level plane equation at the ith observation with level OS>According to the intersection line of the measuring tube liquid level plane equation and the horizontal plane OS in the ith observation and the inclined line of the power equipment foundation in the ith observation, the inclined line of the power equipment foundation in the ith observation is obtained
Calculating a circle x formed by the liquid level point of the measuring pipe A, the liquid level point of the measuring pipe B and the liquid level point of the measuring pipe C 2 +y 2 ＝4h 2 An intersection with the inclined line of the power equipment foundation at the i-th observation, to obtain a first intersection (x 1 ,y 1 ) And a second intersection point (x 2 ,y 2 ) The first intersection point (x 1 ,y 1 ) And a second intersection point (x 2 ,y 2 ) Plane equation of liquid level of measuring tube respectively brought into ith observationObtaining a first liquid level change value z 1 And a second liquid level change value z 2 Wherein |z 1 |＝|z 2 I (I); according to the formula->Calculating an inclination angle beta of the power equipment foundation;
step 405, determining a tilt azimuth of the power equipment foundation: tilting line of power equipment foundation at ith observationDetermining the inclination base azimuth angle of the power installation base at the ith observation>Wherein alpha is less than or equal to 0 DEG 0 ＜180°；
According to formula Z min ＝min(z 1 ,z 2 ) Determining a first level change value z 1 And a second liquid level change value z 2 And utilize Z min Determining its corresponding X coordinate X low Wherein, when z 1 ＞z 2 When Z is min ＝z 2 ，x low ＝x 2 The method comprises the steps of carrying out a first treatment on the surface of the When z 1 ＜z 2 When Z is min ＝z 1 ，x low ＝x 1 ；
When x is low At > 0, the inclination azimuth α=α of the power equipment foundation 1 at the ith observation 0 ；
When x is low When < 0, the inclination azimuth angle α=α of the power equipment foundation 1 at the ith observation 0 +180°；
When x is low ＝0，y low At > 0, the inclination azimuth α=0° of the power equipment foundation 1 at the i-th observation;
when x is low ＝0，y low When < 0, the inclination azimuth angle alpha of the power equipment foundation 1 at the ith observation time is=180°;
wherein, the inclination azimuth angle alpha of the power equipment foundation 1 in the ith observation is an included angle with the north direction, y low To utilize Z min Determining the corresponding Y coordinate, when z 1 ＞z 2 When Z is min ＝z 2 ，y low ＝y 2 The method comprises the steps of carrying out a first treatment on the surface of the When z 1 ＜z 2 When Z is min ＝z 1 ，y low ＝y 1 ；
Step 406, according to the formula Δh= 2|z 1 cos beta| calculating the relative sedimentation delta H of the power equipment foundation 1;
fifthly, early warning of differential settlement of the power equipment foundation: the inclination angle threshold value and the relative sedimentation amount threshold value of the electric power equipment foundation 1 are stored in the computer 11 in advance, and when the inclination angle beta of the electric power equipment foundation 1 is larger than the inclination angle threshold value of the electric power equipment foundation 1 or the relative sedimentation delta H of the electric power equipment foundation 1 is larger than the relative sedimentation amount threshold value of the electric power equipment foundation 1, the computer 11 sends out an early warning signal.
When the invention is used, the length of the basic communicating pipe can be set according to the basic size of the electric equipment, the change of the liquid level of the measuring pipe is obtained by using the camera according to the principle that the liquid level of the measuring pipe is equal, the high-precision observation data of the non-uniform settlement of the electric equipment foundation can be obtained accurately in real time, and the safety early warning is carried out, so that the use effect is good.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (6)
1. Automatic monitoring device of power equipment basis differential settlement, its characterized in that: the device comprises a basic communicating pipe and a data processing platform, wherein the basic communicating pipe is arranged on a power equipment foundation (1), the basic communicating pipe comprises a central pipe (2-1) and three branch pipes (2-2) which are communicated with the central pipe (2-1) and are equal in length, an included angle between any two branch pipes (2-2) in the three branch pipes (2-2) is 120 degrees, the central pipe (2-1) is communicated with a liquid storage tank (6) for storing colored liquid through a hose (5), one end of the branch pipe (2-2) away from the central pipe (2-1) is provided with a sedimentation data acquisition device (3), the sedimentation data acquisition device (3) comprises a protective cover (3-1) and a camera (3-3) which is arranged in the protective cover (3-1) and acquires measurement data of the measurement pipe (3-2), the measurement pipe (3-2) is an L-shaped transparent measurement pipe, one side of the L-shaped transparent measurement pipe facing the camera (3-3) is provided with a scale, one end of the L-shaped transparent measurement pipe and the branch pipe (2-2) away from the central pipe (2-1) is provided with a through hole (5); the data processing platform comprises a bracket (4) and an electronic circuit board arranged on the bracket (4), wherein a controller (12), a memory (10) and a communication module (9) are integrated on the electronic circuit board, the memory (10) is connected with the controller (12) and the communication module (9) is used for communicating with a computer (11), the input end of the controller (12) is connected with a data processing circuit (8), and a camera (3-3) is connected with the data processing circuit (8) through a camera connecting wire (3-4);
the L-shaped transparent measuring pipe is connected with the branch pipe (2-2) through an electric flow regulating valve (7), the electric flow regulating valve (7) is controlled by a controller (12), and the electric flow regulating valve (7) is fixed on the power equipment foundation (1);
the colored liquid is colored antifreezing liquid.
2. An automatic monitoring device for differential settlement of electrical equipment foundation according to claim 1, wherein: and the hose (5) is provided with a water pump, and the water pump is controlled by a controller (12).
3. An automatic monitoring device for differential settlement of electrical equipment foundation according to claim 1, wherein: the protective cover (3-1) is a heat-insulating waterproof transparent protective cover.
4. An automatic monitoring device for differential settlement of electrical equipment foundation according to claim 1, wherein: the communication module (9) is a wired communication module or a wireless communication module.
5. A method for automatic monitoring of differential settlement of a power plant foundation using the apparatus of claim 1, wherein: the method comprises the following steps:
step one, mounting and adjusting an automatic monitoring device, wherein the process is as follows:
step 101, determining the central position of the plane of the power equipment foundation (1), setting the central position of a central tube (2-1) at the central position of the plane of the power equipment foundation (1), determining the initial plane level of the power equipment foundation (1), and adjusting the vertical measuring tube of the L-shaped transparent measuring tube to be vertical to the initial plane of the power equipment foundation (1);
102, connecting an L-shaped transparent measuring tube with a branch tube (2-2) through an electric flow regulating valve (7), installing a water suction pump on a hose (5), controlling the water suction pump and the electric flow regulating valve (7) by a controller (12), fixing the electric flow regulating valve (7) on an electric equipment foundation (1), controlling the water suction pump and the electric flow regulating valve (7) to be opened by the controller (12), pumping colored liquid in a liquid storage tank (6) into the central tube (2-1) by the water suction pump, and enabling the colored liquid to flow into each branch tube (2-2) from the central tube (2-1) and then flow into the measuring tube (3-2), so as to keep the liquid level in the three measuring tubes (3-2) equal;
step 103, a computer (11) sets three branch pipes (2-2) which are respectively a branch pipe A, a branch pipe B and a branch pipe C, adjusts the branch pipe A to point to the north direction, and sequences the branch pipe A, the branch pipe B and the branch pipe C clockwise;
the computer (11) sets three measuring pipes (3-2) which are respectively a measuring pipe A, a measuring pipe B and a measuring pipe C, wherein the measuring pipe A is communicated with a branch pipe A, the measuring pipe B is communicated with a branch pipe B, and the measuring pipe C is communicated with a branch pipe C;
step two, acquiring and transmitting a measuring tube liquid level height image: taking a camera (3-3) as a period of time T, photographing a measuring tube (3-2), acquiring measuring tube liquid level images at different moments, transmitting the measuring tube liquid level images at different moments to a controller (12) and storing the measuring tube liquid level images in a memory (10), and transmitting the measuring tube liquid level images at different moments stored in the memory (10) to a computer (11) by the controller (12) through a communication module (9) in sequence of photographing time;
step three, image processing is carried out to obtain the liquid level height data of the measuring tube: the computer (11) processes the measuring tube liquid level images at different moments in sequence of the time of the received measuring tube liquid level images, and the processing methods of the measuring tube liquid level images at different moments are the same in the image processing process;
when any one measuring tube liquid level image is processed, the process is as follows:
step 301, gray scale processing is carried out on the liquid level image of the measuring tube to obtain a gray scale image of the liquid level of the measuring tube;
step 302, filtering the gray level image of the liquid level of the measuring tube by adopting a rapid median filtering algorithm to obtain a gray level denoising image of the liquid level of the measuring tube;
step 303, processing the gray level denoising image of the liquid level of the measuring tube by using an edge detection method, extracting the boundary position of the liquid level in the gray level denoising image of the liquid level of the measuring tube, identifying scale data at the boundary position of the liquid level, and obtaining the reading of the liquid level of the measuring tube;
step four, automatic monitoring of non-uniform settlement of the power equipment foundation, wherein the process is as follows:
step 401, constructing a three-dimensional space coordinate system: a three-dimensional space coordinate system O-XYZ is established by taking the central position of a plane where the power equipment foundation (1) is located as a coordinate origin O, the north direction pointed by the branch pipe A as a Y-axis positive direction, the direction horizontally perpendicular to the Y-axis and pointed by the branch pipe C to the branch pipe B as an X-axis positive direction, and the direction vertically perpendicular to the Y-axis and vertically upwards from the plane where the power equipment foundation (1) is located as a Z-axis positive direction, wherein the Y-axis passes through the central axis of the branch pipe A;
step 402, according to the formulaCalculating the change Z of the liquid level of the measuring tube A during the ith observation Ai Level change value Z of measuring tube B Bi And a liquid level change value Z of the measurement pipe C Ci Wherein i is the number of observations and i is a positive integer not less than 1, Z a0 To measure the initial level reading of A, Z b0 To measure the initial level reading of B, Z c0 To measure the initial level reading of the tube C, Z ai For the level observation reading of the measuring tube A at the ith observation, Z bi For the level observation reading of the measuring tube B at the ith observation, Z ci The liquid level observation reading of the measuring tube C in the ith observation is obtained;
step 403, establishing a measuring tube liquid level plane equation: the computer (11) measures the liquid level points (0, 2h, Z) of the pipe A according to the ith observation Ai ) Measuring tube B liquid level point at the ith observationAnd the liquid level height point of the measuring tube C at the time of the ith observation +.>The measurement tube liquid level plane equation in the ith observation is established as follows:wherein 2h is the length of the branch pipe (2-2);
step 404, according to the measuring tube liquid level plane equation in the ith observationAnd a horizontal planeOS equation z=0, determining the intersection line +_of the measuring tube level plane equation at the ith observation with the level OS>According to the intersection line of the measuring tube liquid level plane equation and the horizontal plane OS in the ith observation and the inclined line of the power equipment foundation in the ith observation, the inclined line of the power equipment foundation in the ith observation is obtained
According to the formulaCalculating a circle x formed by the liquid level point of the measuring pipe A, the liquid level point of the measuring pipe B and the liquid level point of the measuring pipe C 2 +y 2 ＝4h 2 An intersection with the inclined line of the power equipment foundation at the i-th observation, to obtain a first intersection (x 1 ,y 1 ) And a second intersection point (x 2 ,y 2 ) The first intersection point (x 1 ,y 1 ) And a second intersection point (x 2 ,y 2 ) Plane equation of liquid level of measuring tube respectively brought into ith observationObtaining a first liquid level change value z 1 And a second liquid level change value z 2 Wherein z is 1 ＝z 2 The method comprises the steps of carrying out a first treatment on the surface of the According to the formula->Calculating an inclination angle beta of the power equipment foundation;
step 405, determining a tilt azimuth of the power equipment foundation: tilting line of power equipment foundation at ith observationDetermining a tilting basis for a power equipment basis at the ith observationFoundation azimuth->Wherein alpha is less than or equal to 0 DEG 0 ＜180°；
According to formula Z min ＝min(z 1 ,z 2 ) Determining a first level change value z 1 And a second liquid level change value z 2 And utilize Z min Determining its corresponding X coordinate X low Wherein, when z 1 ＞z 2 When Z is min ＝z 2 ，x low ＝x 2 The method comprises the steps of carrying out a first treatment on the surface of the When z 1 ＜z 2 When Z is min ＝z 1 ，x low ＝x 1 ；
When x is low At > 0, the inclination azimuth angle α=α of the power equipment foundation (1) at the ith observation 0 ；
When x is low When < 0, the inclination azimuth angle alpha=alpha of the power equipment foundation (1) at the ith observation 0 +180°；
When x is low ＝0，y low At > 0, the inclination azimuth angle α=0° of the power equipment foundation (1) at the i-th observation;
when x is low ＝0，y low When < 0, the inclination azimuth angle alpha=180° of the power equipment foundation (1) at the ith observation;
wherein the inclination azimuth angle alpha of the power equipment foundation (1) in the ith observation is an included angle with the north direction, y low To utilize Z min Determining the corresponding Y coordinate, when z 1 ＞z 2 When Z is min ＝z 2 ，y low ＝y 2 The method comprises the steps of carrying out a first treatment on the surface of the When z 1 ＜z 2 When Z is min ＝z 1 ，y low ＝y 1 ；
Step 406, according to the formula Δh= 2|z 1 cos beta is used for calculating the relative sedimentation delta H of the power equipment foundation (1);
fifthly, early warning of differential settlement of the power equipment foundation: the inclination angle threshold value and the relative sedimentation amount threshold value of the power equipment foundation (1) are stored in the computer (11) in advance, and when the inclination angle beta of the power equipment foundation (1) is larger than the inclination angle threshold value of the power equipment foundation (1) or the relative sedimentation delta H of the power equipment foundation (1) is larger than the relative sedimentation amount threshold value of the power equipment foundation (1), the computer (11) sends an early warning signal.
6. The method according to claim 5, wherein: in step 102, the electric flow regulating valve (7) arranged on the measuring tube (3-2) is used for regulating the same amount of colored liquid flowing into the measuring tube (3-2), and the liquid level in the three measuring tubes (3-2) is kept equal.
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| CN114505165A (en) * | 2022-01-07 | 2022-05-17 | 武汉理工大学 | Automatic water analysis simulation system and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51119258A (en) * | 1975-04-11 | 1976-10-19 | Iwatsu Electric Co Ltd | Displacement detector |
| CN2416484Y (en) * | 2000-03-17 | 2001-01-24 | 黄中伟 | Vertical structure relative displacement automatic measuring arrangement |
| CN201876258U (en) * | 2010-12-03 | 2011-06-22 | 西安科技大学 | Building differential settlement measuring device |
| CN102269578A (en) * | 2010-06-01 | 2011-12-07 | 青建集团股份公司 | Vertical deformation measuring device of spatial structure |
| CN102607518A (en) * | 2012-02-22 | 2012-07-25 | 石家庄铁道大学 | Horizontal multipoint settlement monitoring device and monitoring method thereof based on hydraulic measurement |
| CN207741740U (en) * | 2018-01-11 | 2018-08-17 | 西安科技大学 | The automated watch-keeping facility of power equipment foundation uneven settlement |
-
2018
- 2018-01-11 CN CN201810025225.0A patent/CN108204800B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51119258A (en) * | 1975-04-11 | 1976-10-19 | Iwatsu Electric Co Ltd | Displacement detector |
| CN2416484Y (en) * | 2000-03-17 | 2001-01-24 | 黄中伟 | Vertical structure relative displacement automatic measuring arrangement |
| CN102269578A (en) * | 2010-06-01 | 2011-12-07 | 青建集团股份公司 | Vertical deformation measuring device of spatial structure |
| CN201876258U (en) * | 2010-12-03 | 2011-06-22 | 西安科技大学 | Building differential settlement measuring device |
| CN102607518A (en) * | 2012-02-22 | 2012-07-25 | 石家庄铁道大学 | Horizontal multipoint settlement monitoring device and monitoring method thereof based on hydraulic measurement |
| CN207741740U (en) * | 2018-01-11 | 2018-08-17 | 西安科技大学 | The automated watch-keeping facility of power equipment foundation uneven settlement |
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