CN110148118B - Switch cabinet grounding knife state non-contact monitoring method, system, medium and equipment - Google Patents

Switch cabinet grounding knife state non-contact monitoring method, system, medium and equipment Download PDF

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Publication number
CN110148118B
CN110148118B CN201910324214.7A CN201910324214A CN110148118B CN 110148118 B CN110148118 B CN 110148118B CN 201910324214 A CN201910324214 A CN 201910324214A CN 110148118 B CN110148118 B CN 110148118B
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state
preset
ground
switch
calibration value
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CN110148118A (en
Inventor
肖致远
袁培
毛文奇
刘张磊
李喜桂
黎刚
周挺
韩忠晖
陈功
刘赟
陈佳
张芳
邬旭东
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
Changsha Power Supply Co of State Grid Hunan Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
Changsha Power Supply Co of State Grid Hunan Electric Power Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/70—Determining position or orientation of objects or cameras
    • G06T7/73—Determining position or orientation of objects or cameras using feature-based methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10004—Still image; Photographic image
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30164—Workpiece; Machine component
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30232—Surveillance

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Image Analysis (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention discloses a non-contact monitoring method, a system, a medium and equipment for the state of a switch cabinet ground switch, wherein the method comprises the steps of collecting a ground switch image and identifying the center coordinates of a mark point; comparing the geometric characteristics of the central coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the geometric characteristics of the central coordinates of the mark points and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state. The invention can monitor the grounding switch in the switch cabinet in a non-contact mode, can acquire the state of the grounding switch in real time, can realize accurate judgment of the opening and closing states of the grounding switch in the switch cabinet, can conveniently form double-confirmation monitoring of the grounding switch state of the switch cabinet with the existing contact monitoring mode, and has the advantages of simple implementation structure and low cost.

Description

Switch cabinet grounding knife state non-contact monitoring method, system, medium and equipment
Technical Field
The invention relates to the technical field of power measurement, in particular to a switch cabinet grounding switch state non-contact monitoring method, system, medium and equipment.
Background
The switch cabinet is an electrical device, and the main function of the switch cabinet is to open and close, control and protect the electrical device in the process of generating, transmitting, distributing and converting electric energy of an electric power system. The switch cabinet ground knife is an extremely important actuating switch device in the switch cabinet. In the working process of the switch cabinet, if the switch needs to be opened and closed, the grounding knife needs to be rotated to a corresponding position, and if the grounding knife cannot be actuated in place, the closing/opening effect can be seriously influenced, so that equipment damage or even safety accidents are caused. Therefore, during the operation of the ground knife, the opening and closing state of the ground knife must be monitored.
In the design of the existing switch cabinet, the opening and closing states of the grounding switch are usually detected by manual observation and a contact pressure sensor and a contact strain sensor (strain gauge). The manual observation mode is not only big in error but also wastes time and energy, is difficult to satisfy the demand of smart power grid key in proper order accuse. The touch sensor needs to be arranged on a grounding switch contact, so that the touch sensor not only hinders the operation of the contact, but also is easily influenced by large working current in a switch, and the touch sensor is failed or damaged. In addition, according to the guiding idea of 'one-key sequential control' in the planning of the future smart grid of the country, the on-off state of the grounding switch must be determined doubly, that is, two independent technical means are required to determine the on-off state of the grounding switch simultaneously, so that the validity of data can be determined. In addition, it is also urgently needed to develop a new monitoring means based on the existing contact monitoring method to be able to complete the requirement of double-confirmation monitoring.
Therefore, on the basis of the existing contact monitoring technology, how to realize stable and reliable switch cabinet grounding switch state non-contact monitoring becomes a key technical problem to be solved urgently.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention can monitor the grounding switch in the switch cabinet in real time in a non-contact mode, can acquire the state of the grounding switch in real time, can accurately judge the opening and closing state of the grounding switch in the switch cabinet, and can conveniently form double-confirmation monitoring of the grounding switch state of the switch cabinet with the existing contact monitoring mode.
In order to solve the technical problems, the invention adopts the technical scheme that:
a non-contact monitoring method for the state of a switch cabinet grounding switch comprises the following implementation steps:
1) collecting a ground knife image;
2) identifying the center coordinates of the mark points on the ground cutter in the ground cutter image;
3) comparing the geometric characteristics of the central coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the geometric characteristics of the central coordinates of the mark points and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
Optionally, the step 1) of collecting the ground knife image further includes the steps of supplementing light to the ground knife by turning on the light source, and turning off the light source after the ground knife image collection is completed.
Optionally, step 2) comprises: and calculating the gray gravity center of a single mark point on the moving contact of the ground knife in the ground knife image by adopting a gray gravity center calculation method to serve as the center coordinate of the mark point in the ground knife image.
Optionally, step 2) comprises: and respectively calculating the gray gravity centers of two mark points on the moving contact of the ground knife in the ground knife image by adopting a gray gravity center calculation method, and then taking the middle point of the connecting line of the gray gravity centers of the two mark points as the center coordinates of the mark points.
Optionally, the step 3) further includes a step of determining that the earthing switch is in the opening/closing intermediate state when the geometric characteristic of the central coordinate of the mark point and the error of the preset opening state calibration value are greater than a preset threshold value and the error of the preset closing state calibration value is greater than the preset threshold value.
Optionally, the geometric feature of the central coordinate of the marker in step 3) specifically refers to an actual position coordinate of the central coordinate of the marker; the step 3) comprises the following steps:
3.1A) converting the central coordinates of the mark points into the actual position coordinates of the mark points;
3.2A) comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
Optionally, step 3.1A) is preceded by a step of calibrating the object plane resolution parameter Z, where the step of calibrating the object plane resolution parameter Z includes: determining the size of the marking point in the ground-cutting image by taking the pixel as a unit, calculating the proportion value between the size of the marking point in the ground-cutting image by taking the pixel as the unit and the actual size, and taking the calculated proportion value as an object plane resolution parameter Z.
Optionally, the step of calibrating the object plane resolution parameter Z includes: determining the size of the marking point in the ground-cutting image by taking the pixel as a unit, calculating the proportion value between the size of the marking point in the ground-cutting image by taking the pixel as the unit and the actual size, and taking the calculated proportion value as an object plane resolution parameter Z.
Optionally, the mark point is circular, the size in pixels refers to the number of pixels occupied by the diameter of the mark point, and the actual size of the mark point refers to the actual physical size of the diameter of the mark point.
Optionally, before the step 3.2A), a step of calibrating the calibration value of the opening state and the calibration value of the closing state is further included, and the step of calibrating the calibration value of the opening state and the calibration value of the closing state includes: collecting a ground switch image in a switching-off state, identifying a mark point center coordinate in a ground switch image in the switching-off state, converting the mark point center coordinate in the switching-off state into a first actual position coordinate of a mark point, and taking the first actual position coordinate as a preset switching-off state calibration value; collecting a ground tool image in a closing state, identifying a mark point center coordinate in a ground tool image in the closing state, converting the mark point center coordinate in the closing state into a second actual position coordinate of the mark point, and taking the second actual position coordinate as a preset closing state calibration value.
Optionally, step 3.2A) comprises: comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the formula (1) is satisfied, judging that the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, and the ground switch is in an opening state; if the formula (2) is satisfied, judging that the error between the ground cutter and a preset calibration value of the closing state is less than or equal to a preset threshold value, and the ground cutter is in the closing state;
x∈(x1-a,x1+ a) and y ∈ (y)1-a,y1+a) （1）
x∈(x2-b,x2+ b) and y ∈ (y)2-b,y2+b) （2）
In the formulas (1) and (2), (x, y) are the actual position coordinates of the mark points, (x1,y1) Is a brake-off state calibration value (x)2,y2) The preset threshold value is a standard value of the closing state, a is a preset threshold value for judging the opening state, and b is a preset threshold value for judging the closing state.
Optionally, the geometric characteristic of the center coordinate of the mark point in step 3) specifically refers to an angle of a mark point center coordinate connection line of two mark points, which are both located on the moving contact of the ground cutter and are arranged along the length direction of the moving contact, with respect to a plane where the ground cutter is located, and step 3) includes:
3.1B) acquiring a mark point central coordinate connecting line according to mark point central coordinates of two mark points which are both positioned on a moving contact of the ground cutter and are arranged along the length direction of the moving contact, and acquiring an angle of the mark point central coordinate connecting line relative to a plane where the ground cutter is positioned;
3.2B) comparing the angle of the central coordinate connecting line of the mark point to the plane where the grounding switch is arranged with a preset switching-off state calibration value and a switching-on state calibration value, and if the error between the central coordinate connecting line of the mark point and the preset switching-off state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in a switching-off state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
Optionally, before the step 3.2B), a step of calibrating the calibration value of the opening state and the calibration value of the closing state is further included, and the step of calibrating the calibration value of the opening state and the calibration value of the closing state includes: placing the ground cutter in a switching-off state, acquiring center coordinates of two mark points in a ground cutter image in the switching-off state of the ground cutter, acquiring a mark point center coordinate connecting line according to the mark point center coordinates of the two mark points, acquiring a first angle of the mark point center coordinate connecting line to a plane on which the ground cutter is placed, and taking the first angle as a preset switching-off state calibration value; the method comprises the steps of placing a ground cutter in a closing state, obtaining the center coordinates of two mark points in a ground cutter image in the closing state of the ground cutter, obtaining a mark point center coordinate connecting line according to the mark point center coordinates of the two mark points, obtaining a second angle of the mark point center coordinate connecting line to a plane where the ground cutter is placed, and taking the second angle as a preset closing state calibration value.
Optionally, the geometric feature of the center coordinates of the mark points in step 3) specifically refers to an actual distance between two mark points, one mark point is located on the movable contact of the ground cutter, and the other mark point is located on the stationary contact of the ground cutter, and step 3) includes:
3.1C) obtaining the center coordinates of the two marking points, wherein one marking point is positioned on the movable contact of the ground cutter, and the other marking point is positioned on the fixed contact of the ground cutter; converting the mark point center coordinates of the two mark points into actual position coordinates respectively according to the object plane resolution parameter Z, and calculating to obtain the actual distance between the two mark points according to the actual position coordinates of the centers of the two mark points;
3.2C) comparing the actual distance between the two marking points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the actual distance and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in the opening state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
Optionally, the step 3.1C) of converting the mark point center coordinates of the two mark points into the actual position coordinates according to the object plane resolution parameter Z respectively means that the mark point center coordinates (x ', y') of the mark points are converted based on the preset object plane resolution parameter Z to obtain the actual position coordinates (x '/Z, y'/Z) of the mark points.
Optionally, step 3.1C) is preceded by a step of calibrating the object plane resolution parameter Z, where the step of calibrating the object plane resolution parameter Z includes: determining the size of the marking point in the ground-cutting image by taking the pixel as a unit, calculating the proportion value between the size of the marking point in the ground-cutting image by taking the pixel as the unit and the actual size, and taking the calculated proportion value as an object plane resolution parameter Z.
Optionally, the mark point is circular, the size in pixels refers to the number of pixels occupied by the diameter of the mark point, and the actual size of the mark point refers to the actual physical size of the diameter of the mark point.
Optionally, before the step 3.2C), a step of calibrating the calibration value of the opening state and the calibration value of the closing state is further included, and the step of calibrating the calibration value of the opening state and the calibration value of the closing state includes: placing the ground knife in a switching-off state, acquiring center coordinates of two mark points in a ground knife image in the switching-off state of the ground knife, acquiring center coordinates of the mark points of the two mark points, converting the center coordinates of the mark points of the two mark points into actual position coordinates respectively according to an object surface resolution parameter Z, calculating according to the actual position coordinates of the centers of the two mark points to obtain a first actual distance of the two mark points, and taking the first actual distance as a preset switching-off state calibration value; the method comprises the steps of placing a ground cutter in a closing state, obtaining the center coordinates of two mark points in a ground cutter image in a closing state of the ground cutter, obtaining the center coordinates of the mark points of the two mark points, converting the center coordinates of the mark points of the two mark points into actual position coordinates according to an object surface resolution parameter Z, calculating a second actual distance of the two mark points according to the actual position coordinates of the centers of the two mark points, and taking the second actual distance as a preset closing state calibration value.
The invention also provides a switch cabinet grounding switch state non-contact monitoring system, which comprises:
the image acquisition program unit is used for acquiring a ground cutter image;
the center coordinate identification program unit is used for identifying the center coordinates of the mark points on the ground knife in the ground knife image;
the opening and closing state judgment program unit is used for comparing a preset opening state calibration value and a closing state calibration value according to the geometric characteristics of the central coordinates of the mark points, and judging that the grounding switch is in the opening state if the error between the preset opening state calibration value and the preset closing state calibration value is less than or equal to a preset threshold value; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
The invention also provides a switch cabinet grounding switch state non-contact monitoring system, which comprises a computer device, wherein the computer device is programmed to execute the steps of the switch cabinet grounding switch state non-contact monitoring method, or a storage medium of the computer device is stored with a computer program which is programmed to execute the switch cabinet grounding switch state non-contact monitoring method.
The invention also provides a computer-readable storage medium on which a computer program is stored which is programmed to carry out the aforementioned switch cabinet ground switch state non-contact monitoring method of the invention.
The invention also provides switch cabinet ground knife state non-contact monitoring equipment which comprises a mark point unit, and computer equipment and image acquisition equipment which are in communication connection with each other, wherein the mark point unit comprises at least one mark point arranged on a ground knife, the image acquisition equipment is arranged in the switch cabinet, the lens of the image acquisition equipment faces the ground knife of the switch cabinet, the computer equipment is programmed to execute the steps of the switch cabinet ground knife state non-contact monitoring method, or a storage medium of the computer equipment is stored with a computer program which is programmed to execute the switch cabinet ground knife state non-contact monitoring method.
Compared with the prior art, the invention has the following advantages:
1. after a central coordinate of a mark point on a ground cutter in a ground cutter image is identified, comparing the central coordinate with a preset opening state calibration value and a closing state calibration value according to the geometric characteristics of the central coordinate of the mark point, and if the error of the central coordinate with the preset opening state calibration value is less than or equal to a preset threshold value, judging that the ground cutter is in an opening state; if the error of the preset switch-on state calibration value is less than or equal to the preset threshold value, the grounding switch is judged to be in the switch-on state, the grounding switch in the switch cabinet is monitored in real time in a non-contact mode, and any equipment such as a contact sensor is not required to be installed on the grounding switch, so that any influence on the device of the switch cabinet can be avoided, and the accurate judgment on the switch-on and switch-off of the grounding switch in the switch cabinet can be realized through the monitoring method. In addition, the monitoring method is combined on the basis of the existing ground switch on-off state method, so that the ground switch on-off state can be detected and judged more safely and reliably in a double-confirmation mode.
2. The method can be realized by a central processing unit with processing and control functions based on software programs, so that the switch cabinet ground switch state non-contact monitoring mode has the advantages of simple structure and low cost.
Drawings
FIG. 1 is a schematic diagram of a basic process of an embodiment of the present invention.
Fig. 2 is a schematic system structure diagram according to a first embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
The first embodiment is as follows:
as shown in fig. 1, the method for monitoring the state of the switch cabinet ground switch in a non-contact manner in the embodiment includes the following steps:
1) collecting a ground knife image;
2) identifying the center coordinates of the mark points on the ground cutter in the ground cutter image;
3) comparing the geometric characteristics of the central coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the geometric characteristics of the central coordinates of the mark points and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
In this embodiment, still include when step 1) gathers the ground sword image and give the ground sword light filling, close the step of light source after accomplishing ground sword image acquisition through opening the light source, when carrying out image acquisition, the light source in the control cubical switchboard is opened, otherwise, the light source in the control cubical switchboard is closed. In this way, on the one hand, can improve the image clarity for image acquisition light filling, on the other hand has still improved the life of light source in the cubical switchboard, reduces cubical switchboard power consumption and heat dissipation capacity.
In this embodiment, the image acquisition module can be controlled to acquire the images of the ground switch according to a certain frequency, so that the time interval of monitoring the state of the ground switch can be flexibly controlled.
As an alternative embodiment, a marker may also be used to determine the coordinates of the center of the marker, and step 2) in this manner includes: and calculating the gray gravity center of a single mark point on the moving contact of the ground knife in the ground knife image by adopting a gray gravity center calculation method to serve as the center coordinate of the mark point in the ground knife image.
As an alternative embodiment, two marker points may also be used to determine the coordinates of the center of the marker point, in this way, step 2) includes: and respectively calculating the gray gravity centers of two mark points on the moving contact of the ground knife in the ground knife image by adopting a gray gravity center calculation method, and then taking the middle point of the connecting line of the gray gravity centers of the two mark points as the center coordinates of the mark points.
One or more marking points on the ground knife can be arranged according to the requirement, when a plurality of marking points are arranged, a single marking point can be selected, and the gray gravity center of the marking point is calculated by adopting a gray gravity center calculation method and is used as the center coordinate of the marking point in the ground knife image. Before image acquisition, a marker point needs to be arranged on the ground knife, the marker point can be set to be circular, and the color of the marker point can be red, blue, yellow and the like with strong contrast with the background. The arrangement mode of the marking points can be arranged on the movable contact of the grounding knife or on the movable contact and the static contact of the grounding knife simultaneously according to requirements.
In this embodiment, the step 3) further includes a step of determining that the grounding switch is in the intermediate state of switching on and switching off when the geometric characteristics of the central coordinates of the mark points and the error of the preset calibration value of the switching off state are greater than the preset threshold value and the error of the preset calibration value of the switching on state is greater than the preset threshold value.
In this embodiment, the geometric feature of the center coordinates of the mark points in step 3) specifically refers to actual position coordinates of the center coordinates of the mark points; the step 3) comprises the following steps:
3.1A) converting the central coordinates of the mark points into the actual position coordinates of the mark points;
3.2A) comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
In this embodiment, step 3.1A) further includes, before step 3.1A), a step of calibrating the object plane resolution parameter Z, where the step of calibrating the object plane resolution parameter Z includes: determining the size of the marking point in the ground-cutting image by taking the pixel as a unit, calculating the proportion value between the size of the marking point in the ground-cutting image by taking the pixel as the unit and the actual size, and taking the calculated proportion value as an object plane resolution parameter Z.
The calibration step of the object plane resolution parameter Z comprises the following steps: determining the size of the marking point in the ground-cutting image by taking the pixel as a unit, calculating the proportion value between the size of the marking point in the ground-cutting image by taking the pixel as the unit and the actual size, and taking the calculated proportion value as an object plane resolution parameter Z. In this embodiment, the mark points are circular, the size in pixels refers to the number of pixels occupied by the diameter of the mark point, and the actual size of the mark point refers to the actual physical size of the diameter of the mark point. And taking the ratio of the size of the mark point in the ground image by taking the pixel as a unit to the actual size of the mark point as an object plane resolution parameter, so as to obtain the actual size of an object represented by one pixel point in the ground image. For example, when the diameter of the mark point occupies 2 pixel points in the ground-cutting image and the actual diameter of the mark point is 20mm, the resolution parameter of the object plane is 1:10, and at this time, one pixel point in the ground-cutting image represents the size of 10 mm.
In this embodiment, the step 3.2A) further includes a step of calibrating the calibration value of the opening state and the calibration value of the closing state, and the step of calibrating the calibration value of the opening state and the calibration value of the closing state includes:
collecting a ground switch image in a switching-off state, identifying a mark point center coordinate in a ground switch image in the switching-off state, converting the mark point center coordinate in the switching-off state into a first actual position coordinate of a mark point, and taking the first actual position coordinate as a preset switching-off state calibration value; in the present embodiment, the symbol (A)x 1，y 1) Unit ofIn millimeters.
Collecting a ground tool image in a closing state, identifying a mark point center coordinate in a ground tool image in the closing state, converting the mark point center coordinate in the closing state into a second actual position coordinate of the mark point, and taking the second actual position coordinate as a preset closing state calibration value; in the present embodiment, the symbol (A)x 2，y 2) In millimeters.
In this embodiment, step 3.2A) includes: comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the formula (1) is satisfied, judging that the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, and the ground switch is in an opening state; if the formula (2) is satisfied, judging that the error between the ground cutter and a preset calibration value of the closing state is less than or equal to a preset threshold value, and the ground cutter is in the closing state;
x∈(x1-a,x1+ a) and y ∈ (y)1-a,y1+a) （1）
x∈(x2-b,x2+ b) and y ∈ (y)2-b,y2+b) （2）
In the formulas (1) and (2), (x, y) are the actual position coordinates of the mark points, (x1,y1) Is a brake-off state calibration value (x)2,y2) The preset threshold value is a standard value of the closing state, a is a preset threshold value for judging the opening state, and b is a preset threshold value for judging the closing state. The values of the preset thresholds a and b can be the same or different. In this embodiment, the preset threshold values a and b are both (-1, 1) and have a unit of mm, that is, when the actual position coordinates of the center of the mark point are obtainedxAndyrespectively satisfyx∈（x 1-1，x 1+ 1) andy∈（y 1-1，y 1+ 1), judging that the ground cutter is in a brake-off state, and when the actual position coordinates x and y of the center of the mark point respectively meet the requirementsx∈（x 2-1，x 2+ 1) andy∈（y 2-1，y 2and + 1), judging that the grounding switch is in a switching-off state.
In addition, this embodiment still provides a cubical switchboard ground sword state non-contact monitoring system, includes:
the image acquisition program unit is used for acquiring a ground cutter image;
the center coordinate identification program unit is used for identifying the center coordinates of the mark points on the ground knife in the ground knife image;
the opening and closing state judgment program unit is used for comparing a preset opening state calibration value and a closing state calibration value according to the geometric characteristics of the central coordinates of the mark points, and judging that the grounding switch is in the opening state if the error between the preset opening state calibration value and the preset closing state calibration value is less than or equal to a preset threshold value; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
In addition, the present embodiment further provides a system for monitoring the state of the switch cabinet grounding switch in a non-contact manner, which includes a computer device programmed to execute the steps of the aforementioned method for monitoring the state of the switch cabinet grounding switch in the present embodiment, or a storage medium of the computer device having stored thereon a computer program programmed to execute the aforementioned method for monitoring the state of the switch cabinet grounding switch in the present embodiment.
In addition, the present embodiment further provides a computer-readable storage medium, on which a computer program is stored, which is programmed to execute the switch cabinet ground contact state non-contact monitoring method of the present embodiment.
In addition, the present embodiment further provides a switch cabinet ground switch state non-contact monitoring device, which includes a mark point unit, and a computer device and an image capturing device that are communicatively connected to each other, where the mark point unit includes at least one mark point disposed on a ground switch, the image capturing device is installed in a switch cabinet, and a lens of the image capturing device faces the ground switch of the switch cabinet, the computer device is programmed to execute the steps of the switch cabinet ground switch state non-contact monitoring method in this embodiment, or a storage medium of the computer device stores a computer program that is programmed to execute the switch cabinet ground switch state non-contact monitoring method in this embodiment.
As shown in fig. 2, the image capturing module in this embodiment is a camera 4; the camera 4 is arranged in the switch cabinet, the lens 3 faces the direction of the ground knife, the number of the marking points 2 is two, and the marking points 2 are arranged on a movable contact 12 and a fixed contact 11 of the ground knife 1. However, in this embodiment, only the marking points 2 on the movable contact 12 need to be used. The computer device 5 is connected to the camera 4, the computer device 5 is programmed to execute the steps of the switch cabinet grounding switch state non-contact monitoring method of the embodiment, or a storage medium of the computer device 5 stores a computer program programmed to execute the switch cabinet grounding switch state non-contact monitoring method of the embodiment. In this embodiment, the computer device 5 may access the determined switching on/off state information of the ground switch to the self-system of the switch cabinet by a dry contact manner, and transmit the information to the dispatching system by the self-system of the switch cabinet to perform the double confirmation operation. When the images are collected, the image collecting module can be controlled to collect the images of the ground knife with the arranged mark points according to a certain collecting frequency; and transmitting the collected ground knife image with the mark points to a switch cabinet monitoring system through an industrial Ethernet.
In summary, in the method of this embodiment, the number of the mark points on the ground cutter may be set to be one, and the mark points are arranged on the moving contact of the ground cutter, in which case, the object plane resolution parameter needs to be calibrated; when the opening and closing state of the grounding switch is to be judged, the actual position coordinate of the center of a mark point is obtained according to the center coordinate of the mark point on the grounding switch in the current grounding switch image and the object plane resolution parameter, and the opening and closing state of the grounding switch can be judged after the position coordinate is compared with the opening and closing state threshold value; in this embodiment, only the actual position of one marker point on the ground switch needs to be obtained through the object plane resolution parameter, and the opening and closing state threshold is the position where the marker point is located in the opening and closing state of the ground switch. The switching-on and switching-off state can be judged by comparing the current actual position of the mark point with the switching-on and switching-off state threshold value, and the method has the advantages of being more accurate and simple in judgment of the switching-on and switching-off state of the grounding switch.
Example two:
the present embodiment is substantially the same as the first embodiment, and the main difference point is that the type of the geometric feature selection of the center coordinates of the mark points in step 3) is different, and correspondingly, the specific implementation manner of step 3) is also different.
In this embodiment, the geometric characteristic of the center coordinate of the mark point in step 3) specifically refers to an angle of a mark point center coordinate connection line of two mark points, which are both located on the moving contact of the ground cutter and are arranged along the length direction of the moving contact, with respect to a plane on which the ground cutter is located, and step 3) includes:
3.1B) acquiring a mark point central coordinate connecting line according to mark point central coordinates of two mark points which are both positioned on a moving contact of the ground cutter and are arranged along the length direction of the moving contact, and acquiring an angle of the mark point central coordinate connecting line relative to a plane where the ground cutter is positioned; in this embodiment, the two marking points are respectively disposed at two ends of the moving contact of the ground knife.
3.2B) comparing the angle of the central coordinate connecting line of the mark point to the plane where the grounding switch is arranged with a preset switching-off state calibration value and a switching-on state calibration value, and if the error between the central coordinate connecting line of the mark point and the preset switching-off state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in a switching-off state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
In this embodiment, the step 3.2B) further includes a step of calibrating the calibration value of the opening state and the calibration value of the closing state, and the step of calibrating the calibration value of the opening state and the calibration value of the closing state includes:
placing the ground cutter in a switching-off state, acquiring center coordinates of two mark points in a ground cutter image in the switching-off state of the ground cutter, acquiring a mark point center coordinate connecting line according to the mark point center coordinates of the two mark points, acquiring a first angle of the mark point center coordinate connecting line to a plane on which the ground cutter is placed, and taking the first angle as a preset switching-off state calibration value; denoted as e in this embodiment.
The method comprises the steps of placing a ground cutter in a closing state, obtaining the center coordinates of two mark points in a ground cutter image in the closing state of the ground cutter, obtaining a mark point center coordinate connecting line according to the mark point center coordinates of the two mark points, obtaining a second angle of the mark point center coordinate connecting line to a plane where the ground cutter is placed, and taking the second angle as a preset closing state calibration value. Denoted as f in this embodiment.
When the angle (the angle of a connecting line of the central coordinates of the mark points to the plane where the ground cutter is arranged) is compared with a preset switching-off state calibration value and a preset switching-on state calibration value, if the error between the angle and the switching-off state calibration value e is smaller than a preset threshold value, the switching-off state is judged; and if the error between the angle and the calibration value f of the closing state is smaller than a preset threshold value, judging the closing state. In this embodiment, the predetermined threshold corresponding to the error is (-1 °,1 °) and the unit is degree. Namely, when the angle of the connecting line of the two marking points relative to the plane where the grounding knife is arranged is in the range from e-1 degree to e +1 degree, the grounding knife is judged to be in the brake-off state, and when the angle of the connecting line of the two marking points relative to the plane where the grounding knife is arranged is in the range from f-1 degree to f +1 degree, the grounding knife is judged to be in the brake-off state.
In addition, this embodiment still provides a cubical switchboard ground sword state non-contact monitoring system, includes:
the image acquisition program unit is used for acquiring a ground cutter image;
the center coordinate identification program unit is used for identifying the center coordinates of the mark points on the ground knife in the ground knife image;
the opening and closing state judgment program unit is used for comparing a preset opening state calibration value and a closing state calibration value according to the geometric characteristics of the central coordinates of the mark points, and judging that the grounding switch is in the opening state if the error between the preset opening state calibration value and the preset closing state calibration value is less than or equal to a preset threshold value; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
In addition, the present embodiment further provides a system for monitoring the state of the switch cabinet grounding switch in a non-contact manner, which includes a computer device programmed to execute the steps of the aforementioned method for monitoring the state of the switch cabinet grounding switch in the present embodiment, or a storage medium of the computer device having stored thereon a computer program programmed to execute the aforementioned method for monitoring the state of the switch cabinet grounding switch in the present embodiment.
In addition, the present embodiment further provides a computer-readable storage medium, on which a computer program is stored, which is programmed to execute the switch cabinet ground contact state non-contact monitoring method of the present embodiment.
In addition, the present embodiment further provides a switch cabinet ground switch state non-contact monitoring device, which includes a mark point unit, and a computer device and an image capturing device that are communicatively connected to each other, where the mark point unit includes at least one mark point disposed on a ground switch, the image capturing device is installed in a switch cabinet, and a lens of the image capturing device faces the ground switch of the switch cabinet, the computer device is programmed to execute the steps of the switch cabinet ground switch state non-contact monitoring method in this embodiment, or a storage medium of the computer device stores a computer program that is programmed to execute the switch cabinet ground switch state non-contact monitoring method in this embodiment.
Referring to fig. 2, the image capturing module in this embodiment is a camera 4; the camera 4 is arranged in the switch cabinet, the lens 3 faces the direction of the ground knife, the number of the marking points 2 is two, and the marking points 2 are arranged on a movable contact 12 and a fixed contact 11 of the ground knife 1. However, in this embodiment, only two marking points 2 (only one is shown in fig. 2) on the movable contact 12 need to be used. The computer device 5 is connected to the camera 4, the computer device 5 is programmed to execute the steps of the switch cabinet grounding switch state non-contact monitoring method of the embodiment, or a storage medium of the computer device 5 stores a computer program programmed to execute the switch cabinet grounding switch state non-contact monitoring method of the embodiment. In this embodiment, the computer device 5 may access the determined switching on/off state information of the ground switch to the self-system of the switch cabinet by a dry contact manner, and transmit the information to the dispatching system by the self-system of the switch cabinet to perform the double confirmation operation. When the images are collected, the image collecting module can be controlled to collect the images of the ground knife with the arranged mark points according to a certain collecting frequency; and transmitting the collected ground knife image with the mark points to a switch cabinet monitoring system through an industrial Ethernet.
In summary, in the method of this embodiment, the number of the marking points on the ground knife may be two, the two marking points may be arranged along the length direction of the moving contact of the ground knife, at this time, the angle of the connecting line of the two marking points with respect to the plane where the ground knife is placed is determined according to the central coordinates of the two marking points on the ground knife in the current ground knife image, then the angle is compared with the switching-off state threshold and the switching-on state threshold, and the switching-on and switching-off state of the ground knife is determined according to the comparison result; in the embodiment, the angle of the connecting line of the two mark points relative to the plane on which the grounding switch is arranged can be directly obtained through the center coordinates of the two mark points in the current grounding switch image, and the opening and closing state threshold value is the angle of the connecting line of the two mark points relative to the plane on which the grounding switch is arranged in the grounding switch opening and closing state.
Example three:
the present embodiment is substantially the same as the first embodiment, and the main difference point is that the type of the geometric feature selection of the center coordinates of the mark points in step 3) is different, and correspondingly, the specific implementation manner of step 3) is also different.
In this embodiment, the geometric feature of the center coordinates of the mark points in step 3) specifically refers to an actual distance between two mark points, one mark point is located on the moving contact of the ground cutter, and the other mark point is located on the stationary contact of the ground cutter, and step 3) includes:
3.1C) obtaining the center coordinates of the two marking points, wherein one marking point is positioned on the movable contact of the ground cutter, and the other marking point is positioned on the fixed contact of the ground cutter; converting the mark point center coordinates of the two mark points into actual position coordinates respectively according to the object plane resolution parameter Z, and calculating to obtain the actual distance between the two mark points according to the actual position coordinates of the centers of the two mark points; in this embodiment, the number of the marking points is two, and the two marking points are respectively disposed on the moving contact and the stationary contact, wherein the marking point on the moving contact is located at the top end of the moving contact, and the marking point on the stationary contact is located at the top end of the stationary contact.
3.2C) comparing the actual distance between the two marking points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the actual distance and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in the opening state; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
In this embodiment, converting the mark point center coordinates of the two mark points into actual position coordinates according to the object plane resolution parameter Z in step 3.1C) specifically means converting the mark point center coordinates (x ', y') of the mark points into actual position coordinates (x '/Z, y'/Z) of the mark points based on the preset object plane resolution parameter Z.
In this embodiment, step 3.1C) further includes a step of calibrating the object plane resolution parameter Z, where the step of calibrating the object plane resolution parameter Z includes: determining the size of the marking point in the ground-cutting image by taking the pixel as a unit, calculating the proportion value between the size of the marking point in the ground-cutting image by taking the pixel as the unit and the actual size, and taking the calculated proportion value as an object plane resolution parameter Z.
In this embodiment, the mark points are circular, the size in pixels refers to the number of pixels occupied by the diameter of the mark point, and the actual size of the mark point refers to the actual physical size of the diameter of the mark point.
In this embodiment, step 3.2C) is preceded by a step of calibrating the calibration value of the opening state and the calibration value of the closing state, and the step of calibrating the calibration value of the opening state and the calibration value of the closing state includes:
placing the ground knife in a switching-off state, acquiring center coordinates of two mark points in a ground knife image in the switching-off state of the ground knife, acquiring center coordinates of the mark points of the two mark points, converting the center coordinates of the mark points of the two mark points into actual position coordinates respectively according to an object surface resolution parameter Z, calculating according to the actual position coordinates of the centers of the two mark points to obtain a first actual distance of the two mark points, and taking the first actual distance as a preset switching-off state calibration value; denoted as a in this embodiment.
The method comprises the steps of placing a ground cutter in a closing state, obtaining the center coordinates of two mark points in a ground cutter image in a closing state of the ground cutter, obtaining the center coordinates of the mark points of the two mark points, converting the center coordinates of the mark points of the two mark points into actual position coordinates according to an object surface resolution parameter Z, calculating a second actual distance of the two mark points according to the actual position coordinates of the centers of the two mark points, and taking the second actual distance as a preset closing state calibration value. Denoted b in this embodiment.
And 3.2C) comparing the actual distance between the two marking points with a preset opening state calibration value and a preset closing state calibration value, and determining the opening and closing state of the grounding switch by determining the current position of the grounding switch according to the opening and closing state threshold value of the grounding switch. In this embodiment, when the opening and closing state of the ground switch is to be determined, the actual distance between two mark points is calculated according to the actual position coordinates of the centers of the two mark points on the ground switch; and comparing the obtained actual distance with a switching-off state threshold value and a switching-on state threshold value respectively, if the actual distance is within a preset range of the switching-off state threshold value, judging that the grounding switch is in the switching-off state, and if the actual distance is within a preset range of the switching-on state threshold value, judging that the grounding switch is in the switching-on state. In this embodiment, the preset threshold is (-1, 1) and has a unit of mm, that is, when the actual distance between the two mark points is within a range from a-1mm to a +1mm, it is determined that the ground switch is in the open state, and when the actual distance between the two mark points is within a range from b-1mm to b +1mm, it is determined that the ground switch is in the open state.
In addition, this embodiment still provides a cubical switchboard ground sword state non-contact monitoring system, includes:
the image acquisition program unit is used for acquiring a ground cutter image;
the center coordinate identification program unit is used for identifying the center coordinates of the mark points on the ground knife in the ground knife image;
the opening and closing state judgment program unit is used for comparing a preset opening state calibration value and a closing state calibration value according to the geometric characteristics of the central coordinates of the mark points, and judging that the grounding switch is in the opening state if the error between the preset opening state calibration value and the preset closing state calibration value is less than or equal to a preset threshold value; and if the error between the preset value and the preset value is less than or equal to a preset threshold value, judging that the grounding switch is in a closing state.
In addition, the present embodiment further provides a system for monitoring the state of the switch cabinet grounding switch in a non-contact manner, which includes a computer device programmed to execute the steps of the aforementioned method for monitoring the state of the switch cabinet grounding switch in the present embodiment, or a storage medium of the computer device having stored thereon a computer program programmed to execute the aforementioned method for monitoring the state of the switch cabinet grounding switch in the present embodiment.
In addition, the present embodiment further provides a computer-readable storage medium, on which a computer program is stored, which is programmed to execute the switch cabinet ground contact state non-contact monitoring method of the present embodiment.
In addition, the present embodiment further provides a switch cabinet ground switch state non-contact monitoring device, which includes a mark point unit, and a computer device and an image capturing device that are communicatively connected to each other, where the mark point unit includes at least one mark point disposed on a ground switch, the image capturing device is installed in a switch cabinet, and a lens of the image capturing device faces the ground switch of the switch cabinet, the computer device is programmed to execute the steps of the switch cabinet ground switch state non-contact monitoring method in this embodiment, or a storage medium of the computer device stores a computer program that is programmed to execute the switch cabinet ground switch state non-contact monitoring method in this embodiment.
Referring to fig. 2, the image capturing module in this embodiment is a camera 4; the camera 4 is arranged in the switch cabinet, the lens 3 faces the direction of the ground knife, the number of the marking points 2 is two, and the marking points 2 are arranged on a movable contact 12 and a fixed contact 11 of the ground knife 1. However, in the present embodiment, the mark points 2 on the movable contact 12 and the stationary contact 11 are both used (only one mark point 2 of the movable contact 12 is shown in fig. 2). The computer device 5 is connected to the camera 4, the computer device 5 is programmed to execute the steps of the switch cabinet grounding switch state non-contact monitoring method of the embodiment, or a storage medium of the computer device 5 stores a computer program programmed to execute the switch cabinet grounding switch state non-contact monitoring method of the embodiment. In this embodiment, the computer device 5 may access the determined switching on/off state information of the ground switch to the self-system of the switch cabinet by a dry contact manner, and transmit the information to the dispatching system by the self-system of the switch cabinet to perform the double confirmation operation. When the images are collected, the image collecting module can be controlled to collect the images of the ground knife with the arranged mark points according to a certain collecting frequency; and transmitting the collected ground knife image with the mark points to a switch cabinet monitoring system through an industrial Ethernet.
In summary, in the method of this embodiment, the number of the marking points on the ground cutter may be set to two, and the two marking points may be respectively disposed on the moving contact and the static contact of the ground cutter, in which case, the object plane resolution parameter needs to be calibrated; when the opening and closing state of the grounding switch is to be judged, respectively and correspondingly obtaining the actual position coordinates of the centers of the two marking points according to the center coordinates of the two marking points on the grounding switch in the current grounding switch image and the object plane resolution parameters, and calculating the actual distance between the two marking points according to the actual position coordinates of the centers of the two marking points; comparing the obtained actual distance with the switching-on/off state threshold value to judge the switching-on/off state of the grounding switch; in this embodiment, the actual positions of the two marker points of the ground switch are obtained through the object plane resolution parameters, the actual distance between the two marker points is calculated according to the actual positions, the switching-on/off state threshold is the distance between the two marker points in the switching-on/off state of the ground switch, and the actual distance between the two marker points is used as the basis for judging the switching-on/off state of the ground switch to be compared with the switching-on/off state threshold, so that the judgment of the switching-on/off state of the ground switch can be more accurate.
It should be noted that the first to third embodiments are only two specific embodiments of the geometric feature of the center coordinate of the mark point, and in the beginning of the above embodiments, a person skilled in the art may also select other types of geometric features of the center coordinate of the mark point according to needs, for example, may select other types of reference points, lines, or planes and calculate the coordinates, distances, or angles thereof as the geometric feature of the center coordinate of the mark point.
In addition, this embodiment further provides a double-confirmation method for monitoring the state of the switch cabinet ground switch, which includes the following steps:
the first step is as follows: determining the switching-on and switching-off state of the switch cabinet ground switch state as a first criterion by adopting the existing ground switch switching-on and switching-off state method; meanwhile, the opening and closing state of the switch cabinet ground switch state is determined as a second criterion by adopting the non-contact monitoring method for the switch cabinet ground switch state in any one of the first to third embodiments;
the second step is that: performing logical AND operation on the first criterion and the second criterion, and finally judging that the ground switch state of the switch cabinet is a closing state if the first criterion and the second criterion are both in the closing state; and finally judging that the switch cabinet ground switch state is the switching-off state if the first criterion and the second criterion are both the switching-off state, so that double confirmation of monitoring the switch cabinet ground switch state is realized.
The existing ground knife switching-on and switching-off state method preferably adopts an existing contact method, namely, switching-off/switching-on auxiliary contacts are arranged at the switching-off position and the switching-on position of the ground knife, and when the ground knife is in the switching-off state, the switching-on/switching-off auxiliary contacts are switched on and switched off; when the switching-on state is achieved, the switching-on auxiliary contact is switched on, and the switching-off auxiliary contact is switched off; otherwise, the opening/closing auxiliary contacts are all disconnected, so that the contact type state monitoring is realized. It is needless to say that the existing ground switch on/off state method is not limited to a specific switch cabinet ground switch state monitoring method, and any other contact or non-contact switch cabinet ground switch state monitoring method may be adopted as needed, and the double confirmation of the switch cabinet ground switch state monitoring may also be realized by combining any of the switch cabinet ground switch state non-contact monitoring methods described in the foregoing embodiments.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (13)

1. A non-contact monitoring method for the state of a switch cabinet grounding switch is characterized by comprising the following implementation steps:
1) collecting a ground knife image;
2) identifying the center coordinates of the mark points on the ground cutter in the ground cutter image;
3) comparing the geometric characteristics of the central coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the geometric characteristics of the central coordinates of the mark points and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; if the error between the ground cutter and a preset switching-on state calibration value is less than or equal to a preset threshold value, judging that the ground cutter is in a switching-on state;
the step 3) comprises the following steps:
3.1A) converting the central coordinates of the mark points into the actual position coordinates of the mark points;
3.2A) comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; if the error between the ground cutter and a preset switching-on state calibration value is less than or equal to a preset threshold value, judging that the ground cutter is in a switching-on state;
step 3.2A) comprises: comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the formula (1) is satisfied, judging that the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, and the ground switch is in an opening state; if the formula (2) is satisfied, judging that the error between the ground cutter and a preset calibration value of the closing state is less than or equal to a preset threshold value, and the ground cutter is in the closing state;
x∈(x1-a,x1+ a) and y ∈ (y)1-a,y1+a) （1）
x∈(x2-b,x2+ b) and y ∈ (y)2-b,y2+b) （2）
In the formulas (1) and (2), (x, y) are the actual position coordinates of the mark points, (x1,y1) Is a brake-off state calibration value (x)2,y2) For calibrating the closing stateAnd a is a preset threshold value for judging the opening state, and b is a preset threshold value for judging the closing state.
2. The non-contact monitoring method for the state of the grounding switch of the switch cabinet according to claim 1, wherein the step 1) of collecting the image of the grounding switch further comprises the steps of supplementing light to the grounding switch by turning on a light source and turning off the light source after the collection of the image of the grounding switch is finished.
3. The method for non-contact monitoring of the state of the grounding switch of the switch cabinet according to claim 1, wherein the step 2) comprises the following steps: and calculating the gray gravity center of a single mark point on the moving contact of the ground knife in the ground knife image by adopting a gray gravity center calculation method to serve as the center coordinate of the mark point in the ground knife image.
4. The method for non-contact monitoring of the state of the grounding switch of the switch cabinet according to claim 1, wherein the step 2) comprises the following steps: and respectively calculating the gray gravity centers of two mark points on the moving contact of the ground knife in the ground knife image by adopting a gray gravity center calculation method, and then taking the middle point of the connecting line of the gray gravity centers of the two mark points as the center coordinates of the mark points.
5. The non-contact monitoring method for the state of the switch cabinet grounding switch blade according to claim 1, wherein the step 3) further comprises the step of judging that the grounding switch blade is in the opening/closing intermediate state when the geometric characteristics of the center coordinates of the mark points and the error of the preset opening state calibration value are larger than a preset threshold value and the error of the preset closing state calibration value is larger than the preset threshold value.
6. The method for non-contact monitoring of the state of the switch cabinet grounding switch blade according to claim 1, wherein the step 3.1A) of converting the center coordinates of the mark points into the actual position coordinates of the mark points specifically means that the center coordinates (x ', y') of the mark points are converted based on a preset object plane resolution parameter Z to obtain the actual position coordinates (x '/Z, y'/Z) of the mark points.
7. The method for non-contact monitoring of the state of the switch cabinet grounding switch blade according to claim 6, wherein the step 3.1A) is preceded by a step of calibrating the object plane resolution parameter Z, and the step of calibrating the object plane resolution parameter Z comprises the steps of: determining the size of the marking point in the ground-cutting image by taking the pixel as a unit, calculating the proportion value between the size of the marking point in the ground-cutting image by taking the pixel as the unit and the actual size, and taking the calculated proportion value as an object plane resolution parameter Z.
8. The method for non-contact monitoring of the state of the switch cabinet grounding switch blade according to claim 7, wherein the mark point is a circle, the size in pixels refers to the number of pixels occupied by the diameter of the mark point, and the actual size of the mark point refers to the actual physical size of the diameter of the mark point.
9. The method for non-contact monitoring of the state of the switch cabinet grounding switch according to claim 1, wherein the step 3.2A) is preceded by a step of calibrating the calibration value of the opening state and the calibration value of the closing state, and the step of calibrating the calibration value of the opening state and the calibration value of the closing state comprises the steps of: collecting a ground switch image in a switching-off state, identifying a mark point center coordinate in a ground switch image in the switching-off state, converting the mark point center coordinate in the switching-off state into a first actual position coordinate of a mark point, and taking the first actual position coordinate as a preset switching-off state calibration value; collecting a ground tool image in a closing state, identifying a mark point center coordinate in a ground tool image in the closing state, converting the mark point center coordinate in the closing state into a second actual position coordinate of the mark point, and taking the second actual position coordinate as a preset closing state calibration value.
10. The utility model provides a cubical switchboard ground sword state non-contact monitoring system which characterized in that includes:
the image acquisition program unit is used for acquiring a ground cutter image;
the center coordinate identification program unit is used for identifying the center coordinates of the mark points on the ground knife in the ground knife image;
the opening and closing state judgment program unit is used for comparing a preset opening state calibration value and a closing state calibration value according to the geometric characteristics of the central coordinates of the mark points, and judging that the grounding switch is in the opening state if the error between the preset opening state calibration value and the preset closing state calibration value is less than or equal to a preset threshold value; if the error between the ground cutter and a preset switching-on state calibration value is less than or equal to a preset threshold value, judging that the ground cutter is in a switching-on state;
the step of the opening and closing state judgment program unit comprises the following steps:
3.1A) converting the central coordinates of the mark points into the actual position coordinates of the mark points;
3.2A) comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, judging that the grounding switch is in an opening state; if the error between the ground cutter and a preset switching-on state calibration value is less than or equal to a preset threshold value, judging that the ground cutter is in a switching-on state;
step 3.2A) comprises: comparing the actual position coordinates of the mark points with a preset opening state calibration value and a preset closing state calibration value, and if the formula (1) is satisfied, judging that the error between the actual position coordinates and the preset opening state calibration value is less than or equal to a preset threshold value, and the ground switch is in an opening state; if the formula (2) is satisfied, judging that the error between the ground cutter and a preset calibration value of the closing state is less than or equal to a preset threshold value, and the ground cutter is in the closing state;
x∈(x1-a,x1+ a) and y ∈ (y)1-a,y1+a) （1）
x∈(x2-b,x2+ b) and y ∈ (y)2-b,y2+b) （2）
In the formulas (1) and (2), (x, y) are the actual position coordinates of the mark points, (x1,y1) Is a brake-off state calibration value (x)2,y2) The preset threshold value is a standard value of the closing state, a is a preset threshold value for judging the opening state, and b is a preset threshold value for judging the closing state.
11. A switch cabinet grounding switch state non-contact monitoring system comprising a computer device, characterized in that the computer device is programmed to execute the steps of the switch cabinet grounding switch state non-contact monitoring method according to any one of claims 1 to 9, or a storage medium of the computer device has stored thereon a computer program programmed to execute the switch cabinet grounding switch state non-contact monitoring method according to any one of claims 1 to 9.
12. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which is programmed to execute the method for contactless monitoring of the state of a switch cabinet blade according to any of claims 1 to 9.
13. A non-contact monitoring device for the ground switch state of a switch cabinet, which is characterized by comprising a mark point unit, and a computer device and an image acquisition device which are mutually connected in a communication manner, wherein the mark point unit comprises at least one mark point arranged on a ground switch, the image acquisition device is installed in the switch cabinet, a lens of the image acquisition device faces the ground switch of the switch cabinet, the computer device is programmed to execute the steps of the non-contact monitoring method for the ground switch state of the switch cabinet according to any one of claims 1 to 9, or a storage medium of the computer device is stored with a computer program which is programmed to execute the non-contact monitoring method for the ground switch state of the switch cabinet according to any one of claims 1 to 9.
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