CN105242232B - Outdoor electrical energy meter fault self-verifying method - Google Patents

Outdoor electrical energy meter fault self-verifying method Download PDF

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Publication number
CN105242232B
CN105242232B CN201510649244.7A CN201510649244A CN105242232B CN 105242232 B CN105242232 B CN 105242232B CN 201510649244 A CN201510649244 A CN 201510649244A CN 105242232 B CN105242232 B CN 105242232B
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China
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described
energy meter
electric energy
image
value
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CN201510649244.7A
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Chinese (zh)
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CN105242232A (en
Inventor
师以奎
赵建文
王一
师磊
陈宁
刘继彦
王沈征
张新忠
张秀丽
刘爱新
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国家电网公司
国网山东省电力公司泰安供电公司
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Priority to CN201510152737.XA priority Critical patent/CN104698427B/en
Priority to CN201510649244.7A priority patent/CN105242232B/en
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Publication of CN105242232B publication Critical patent/CN105242232B/en

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Abstract

The present invention relates to a kind of outdoor electrical energy meter fault self-verifying method, comprising: utilize infrared transceiver to send test signal to detected electric energy meter, in order to described detected electric energy meter controls the test character string that its display screen shows that described test signal includes;CCD high-definition camera is utilized the display screen of described detected electric energy meter to be shot with output test image;Utilize image processor that described test image is carried out image procossing, to identify the character string in described test image and to export as identification string;ARM11 processor is utilized to be compared with described test character string by described identification string, to determine whether to send failure alarm signal.Described method also includes the step that image carries out mist elimination process.By means of the invention it is possible to realize the full-automatic accurately detection to outdoor electrical energy meter fault in all weather.

Description

Outdoor electrical energy meter fault self-verifying method

The present invention is Application No. 201510152737.X, filing date April 1 in 2015 day, The divisional application of the patent of bright entitled " outdoor electrical energy meter fault self-verifying method ".

Technical field

The present invention relates to electric energy meter field, particularly relate to a kind of outdoor automatic inspection party of electrical energy meter fault Method.

Background technology

Electric energy meter is power supply management department for detecting each with electric unit or the used electric energy of individual Measuring equipment, is to carry out, to each, the foundation charged with electric unit or individual, and therefore, whether electric energy meter There is fault and determine whether power supply department can charge to electric unit or individual equitably.

The information spinner of electric energy meter to be passed on by its display screen.In the production process of electric energy meter, Its display screen or processing equipment or transmission equipment there will be defect unavoidably, cause the display of display screen not to be inconsistent Close expection, existing defects, have a strong impact on the reception and registration of metrical information.Accordingly, it would be desirable to there is event to suspecting The electric energy meter of barrier detects, particularly with some outdoor electric energy meters, owing to distance high-voltage circuit is relatively near, It is unfavorable for dismounting, is also unfavorable near inspection, thus the requirement to inspection is higher.

In prior art, outdoor electric energy meter to suspected malfunctions carries out display defect detection and mainly uses people Work detection mode, detection operation is many, and testing staff needs the step complexity of input, the degree of accuracy of detection The highest with efficiency, and need to lay down electric energy meter and carry out offline inspection, though have some electronics X-ray inspection X terminal, for the outdoor electric energy meter under haze weather, because some are near high-tension line And its accuracy of detection can not be caused to be highly susceptible to the impact of haze degree near detection.

Accordingly, it would be desirable to a kind of new based on detection of electrons outdoor electrical energy meter fault method of inspection, substitute The manual detection mode of complicated poor efficiency, transforms existing simply constructed electronic checkout terminal, it is achieved right The on-line checking of the display defect of various types of outdoor electric energy meters.

Summary of the invention

In order to solve the problems referred to above, according to an aspect of the present invention, the invention provides a kind of outdoor Electrical energy meter fault self-verifying method, comprising: utilize infrared transceiver to send to detected electric energy meter Test signal, in order to described detected electric energy meter controls its display screen and shows that described test signal includes Test character string;Utilize CCD high-definition camera that the display screen of described detected electric energy meter is carried out Shoot with output test image;Utilize image processor that described test image is carried out image procossing, with Identify the character string in described test image and export as identification string;Utilize ARM11 process Described identification string is compared by device with described test character string, to determine whether to send fault report Alert signal.

Preferably, the profile of described detected electric energy meter is also entered by wherein said CCD high-definition camera Row shooting is to export contour images, and the resolution ratio of described test image and described contour images is all 1920 ×1080。

More specifically, described method farther includes described test image and described contour images difference Carry out mist elimination to process to obtain mist elimination test image and the step of mist elimination contour images.

Preferably, described method utilizes outdoor electrical energy meter fault automatically to check terminal to implement.Therefore, root According to another aspect of the present invention, present invention also offers a kind of outdoor electrical energy meter fault and automatically check end End, described inspection terminal include infrared transceiver, CCD high-definition camera, image processor and ARM11 processor, described infrared transceiver is used for sending test signal to detected electric energy meter, with It is easy to described detected electric energy meter and controls the test character that its display screen shows that described test signal includes String, described CCD high-definition camera for the display screen of described detected electric energy meter is shot with Output test image, described image processor is connected with described CCD high-definition camera, for institute State test image and carry out image procossing, to identify the character string in described test image and as identifying word Symbol string output, described ARM11 processor is connected with described image processor, for by described identification Character string compares with described test character string, to determine whether to send failure alarm signal.

More specifically, automatically check in terminal at described outdoor electrical energy meter fault, described CCD high definition Camera is additionally operable to shoot to export contour images to the profile of described detected electric energy meter, described The resolution ratio of test image and described contour images is all 1920 × 1080;

Further, described terminal also includes:

Power supply, including solar powered device, battery, switching switch and electric pressure converter, Described switching switch is connected, according to battery respectively with described solar powered device and described battery Dump energy decides whether to be switched to described solar powered device with by described solar powered device Power supply, described electric pressure converter is connected with described switching switch, with by the 5V by switching switch input Voltage is converted to 3.3V voltage;

Reset unit, for each electronic unit in described inspection terminal is returned to default conditions, The default conditions of each electronic unit described are that described inspection terminal manufacturer is in described inspection terminal The state set when dispatching from the factory;

Static memory, for prestoring the benchmark image template of the electric energy meter of various species, each The benchmark image template of the electric energy meter of individual kind is that the benchmark electric energy meter to each kind shoots in advance The pattern obtained, described static memory has also prestored electric energy meter information table, described electric energy meter Information table, with electric energy meter kind for index, saves the infrared communication address of each electric energy meter, test Character string, character upper limit gray threshold and character lower limit gray threshold, described character upper limit gray threshold With described character lower limit gray threshold for by the word on the display screen of kind electric energy meter corresponding in image Symbol separates with image background;

Alarm appliance, is connected with described ARM11 processor, including loudspeaker and warning LED, Described loudspeaker is for playing the language warning file corresponding with described failure alarm signal, described warning LED, for showing redness when receiving described failure alarm signal, is receiving fault-free prompting Green is shown during signal;

Go haze processing equipment, between described CCD high-definition camera and described image processor, For receiving described test image and described contour images, to described test image and described contour images Carry out mist elimination respectively to process to obtain mist elimination test image and mist elimination contour images, substitute described test figure Picture and described contour images, input described mist elimination test image and mist elimination contour images at described image Reason device.

Specifically, haze processing equipment is gone to include described in:

Haze Concentration Testing subset, is positioned in air, for the detected electric energy meter place of detection in real time The haze concentration of position, and determine that intensity removed by haze according to haze concentration, intensity removed by described haze Value is between 0 to 1;

Overall air light value obtains subset, is connected to obtain described with described CCD high-definition camera Test image, calculates the gray value of each pixel in described test image, the pixel maximum by gray value Gray value as overall air light value;

Atmospheric scattering light value obtains subset, with described CCD high-definition camera and described haze concentration Detection subset connects respectively, and each pixel to described test image extracts its R, G, B In three Color Channel pixel values, minimum of a value is as target pixel value, uses the Gaussian smoothing filter keeping edge Ripple device EPGF (edge-preserving gaussian filter) is filtered place to described target pixel value Target pixel value, to obtain filtered target pixel value, is deducted filtered target pixel value to obtain target by reason Pixel value difference, uses EPGF to be filtered object pixel difference processing to obtain filtered target pixel Difference, deducts filtered target pixel value filtered target pixel value difference to obtain haze and removes a reference value, Haze is removed intensity be multiplied by haze remove a reference value with obtain haze remove threshold value, take haze remove threshold Minimum of a value in value and target pixel value, as comparison reference, takes the maximum in comparison reference and 0 It is worth the atmospheric scattering light value as each pixel;

Medium transmission rate obtains subset, obtains subset and described air with described overall air light value Scattering light value obtains subset and connects respectively, by big divided by entirety for the atmospheric scattering light value of each pixel Gas light value, to obtain except value, deducts described except value is to obtain the medium transmission rate of each pixel by 1;

Sharpening Image Acquisition subset, with described CCD high-definition camera, described overall atmosphere light Value obtains subset and described medium transmission rate obtains subset and connects respectively, deducts each picture by 1 Described first difference, to obtain the first difference, is multiplied by overall air light value to obtain by the medium transmission rate of element Obtain product value, the pixel value of each pixel in described test image is deducted described product value to obtain Second difference, by described second difference divided by the medium transmission rate of each pixel to obtain each picture The sharpening pixel value of element, in described test image, the pixel value of each pixel includes described test figure The R of each pixel in Xiang, G, B tri-Color Channel pixel value, correspondingly, it is thus achieved that each The sharpening pixel value of pixel includes the R of each pixel, G, B tri-Color Channel sharpening pixel Value, the sharpening pixel value composition mist elimination test image of all pixels.

The mist elimination processing mode that described contour images is carried out by haze processing equipment is gone described in more specifically, Identical with the mist elimination processing mode that described test image is carried out.

More specifically, described image processor goes haze processing equipment to be connected, including electric energy meter with described Type identification unit, contrast enhancement unit, median filter unit, gray processing processing unit, character Cutting unit and character recognition unit, described electric energy meter type identification unit goes haze process to set with described Standby and described static memory connects, respectively by the electricity of described mist elimination contour images Yu described various species Can the benchmark image template of table mate one by one, by electric energy meter corresponding for the benchmark image template that the match is successful Type exports in described static memory and preserves as determining electric energy meter type, described contrast Enhancement unit is connected with described CCD high-definition camera described mist elimination test image is carried out contrast Enhancing processes, and strengthens image to obtain, and described median filter unit is with described contrast enhancement unit even Connect described enhancing image is carried out medium filtering process, to obtain filtering image, at described gray processing Reason unit is connected with described median filter unit, described filtering image is carried out gray processing process, to obtain Obtain gray level image, described Character segmentation unit and described gray processing processing unit and described static storage Device connects respectively, and gray value in described gray level image is being determined character upper limit gray threshold and the most fixed Pixel identification between character lower limit gray threshold also forms multiple character subgraph, described character recognition Unit is connected with described Character segmentation unit, identifies each based on predetermined OCR recognizer The character that character subgraph is corresponding, and according to each character subgraph in described gray level image Multiple characters that position will identify that are combined, to obtain described identification string.

More specifically, it is described ARM11 processor and the unit of described image processor, described Static memory, described CCD high-definition camera and described infrared transceiver connect respectively, first control Make described CCD high-definition camera and shoot described contour images, described in control, go haze processing equipment pair Described contour images carries out mist elimination process, control described electric energy meter type identification unit identify described in Determine electric energy meter type;Subsequently, in described static memory, electric energy meter type search has been determined based on described Described electric energy meter information table, has determined infrared communication address corresponding to electric energy meter type, survey described in obtaining Examination character string, character upper limit gray threshold and character lower limit gray threshold are infrared the most logical respectively as determining Letter address, location survey examination character string, determine character upper limit gray threshold and determined character lower limit gray scale threshold Value is saved in static memory, controls described infrared transceiver to having and determines infrared communication address Detected electric energy meter send include described in the test signal of location survey examination character string, in order to described tested Survey electric energy meter and control the examination character string of location survey that its display screen shows that described test signal includes.More specifically Ground, described ARM11 processor controls the shooting test of described CCD high-definition camera after Preset Time Image, goes haze processing equipment that described test image is carried out mist elimination process described in control, and starts institute State contrast enhancement unit, described median filter unit, described gray processing processing unit, described character Cutting unit and described character recognition unit are to obtain described identification string, and by described identification character The examination of the location survey character string with preservation in described static memory of going here and there matches, and the match is successful then sends nothing Fault cues signal, it fails to match then sends failure alarm signal.

More specifically, described detected electric energy meter receive include described in location survey examination character string survey During trial signal, its internal memory is used to preserve its current reading in real time, in order to after test ending Its display screen recovers its current reading.

More specifically, automatically check in terminal at described outdoor electrical energy meter fault, described electric energy meter type Recognition unit, described contrast enhancement unit, described median filter unit, described gray processing process single Character segmentation unit first, described and described character recognition unit are respectively adopted different fpga chips Realize.

More specifically, automatically check in terminal at described outdoor electrical energy meter fault, described inspection terminal is also Including bar code resolver, with the bar code posted on the detected electric energy meter of detection, it is thus achieved that corresponding The address name of detected electric energy meter ownership and station address.

More specifically, automatically check in terminal at described outdoor electrical energy meter fault, described inspection terminal is also Including wireless communication interface, it is connected with described ARM11 processor and described bar code resolver, with When receiving described failure alarm signal, described address name and described station address are transmitted wirelessly Power supply management platform to far-end.

More specifically, automatically check in terminal at described outdoor electrical energy meter fault, described inspection terminal is also Including shooting secondary light source, including luminance sensor and lighting source, described luminance sensor is used for examining Surveying ambient brightness, described lighting source is connected with described luminance sensor, for bright based on described environment It is that it provides, for the illumination light intensity assisting CCD high-definition camera to shoot that degree adjusts.

The outdoor electrical energy meter fault self-verifying method of the present invention, uses image processing techniques to determine electric energy The type of table, determines, according to the type of electric energy meter, the parameters that electric energy meter display defect detects, and uses The information that Infrared Transmission mode realizes between electric energy meter and inspection terminal is mutual, improves the inspection of electric energy meter defect The versatility surveyed and intelligence degree, more it is essential that determine that haze is to figure according to atmospheric attenuation model The influence factor of picture, and the electric energy meter test image gathered under foggy days is gone at haze Reason, it is thus achieved that the image of electric energy meter test clearly, thus ensure the accuracy of outdoor electrical energy meter fault inspection.

Accompanying drawing explanation

Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:

Fig. 1 is the outdoor electrical energy meter fault of the outdoor electrical energy meter fault self-verifying method implementing the present invention Automatically the block diagram of an embodiment of inspection terminal.

Fig. 2 is the outdoor electrical energy meter fault of the outdoor electrical energy meter fault self-verifying method implementing the present invention Automatically the block diagram of the further embodiment of inspection terminal.

Fig. 3 is automatically to check going of terminal according to the outdoor electrical energy meter fault shown in embodiment of the present invention The block diagram of haze processing equipment.

Detailed description of the invention

Embodiment party to the outdoor electrical energy meter fault self-verifying method of the present invention below with reference to accompanying drawings Case is described in detail.

Being widely used of electric energy meter, is that the most basic metering of power supply management division management user power utilization is whole End, each electricity consumption user is required for installing an electric energy meter with its electricity consumption amount of real time measure, thus, The demand of electric energy meter is big especially, and the market of electric energy meter is the most active.

Electric energy meter common on Vehicles Collected from Market can have following several mode classification: (1) is by purposes: Industry and utility meters, electronic standard table, maximum demand meter, multi tariff table;(2) by structure and work Make principle: induction type (mechanical type), state type (electronic type), electromechanical (hybrid); (3) by accessing power supply natures: alternating-current meter, direct current table;(4) class of accuracy is pressed: conventional common table: 0.2S, 0.5S, 0.2,0.5,1.0,2.0 etc.;(5) by installing the mode of connection: direct access, Access type indirectly;(6) by electrical equipment: single-phase, phase three-wire three, three-phase and four-line electric energy meter.

Be there is query in the reading of electric energy meter display screen as user and report for repairment, or power supply management department When the personnel that arrange work carry out regular maintenance to its electric energy meter managed, it is required for using electric energy meter to lack Fall into inspection terminal electric energy meter is checked, due to electric energy meter enormous amount, therefore electric energy meter defect inspection Test the detection efficiency of terminal, the degree of accuracy and cost performance and be desirable that harshness, more especially near high-tension line The detection of outdoor electric energy meter, be limited by installation environment, it is higher to the requirement of syndrome check.Existing Manual detection mode or simple detection of electrons mode can not meet the current of power supply management department Demand.

The present invention establishes a kind of outdoor electrical energy meter fault self-verifying method, has built a kind of outdoor electricity Can table fault automatically check terminal, be primarily based on image recognition technology and judge electric energy meter type, with based on Differentiated display defect identification technology taked by different types of electric energy meter, simultaneously infrared communication technique and The introducing of various character recognition technologies targetedly, accurately, reliable completes electric energy meter display defect Detection, finally, go the addition of haze processing equipment, overcome bad weather and outdoor electric energy meter is surveyed Attempt the adverse effect of picture.

Fig. 1 is the outdoor electrical energy meter fault of the outdoor electrical energy meter fault self-verifying method implementing the present invention Automatically the block diagram of an embodiment of inspection terminal, described inspection terminal includes infrared receiving/transmission Device 1, CCD high-definition camera 2, image processor 3 and ARM11 processor 4, described infrared receipts Send out device 1 for sending test signal to detected electric energy meter, in order to described detected electric energy meter controls Its display screen shows the test character string that described test signal includes, described CCD high-definition camera 2 For the display screen of described detected electric energy meter being shot with output test image, at described image Reason device 3 is connected with described CCD high-definition camera 2, for carrying out described test image at image Reason, to identify the character string in described test image and to export as identification string, described ARM11 Processor 4 is connected with described image processor 3, for by described identification string and described tested word Symbol string compares, to determine whether to send failure alarm signal.Described ARM11 processor 4 is also It is connected respectively with infrared transceiver 1, CCD high-definition camera 2 to realize the control to them.

Found out by Fig. 2, compared to Figure 1, add haze processing equipment 5 than Fig. 1, remove haze Processing equipment 5, between described CCD high-definition camera 2 and described image processor 3, is used for Receive described test image and described contour images, to described test image and described contour images difference Carry out mist elimination to process to obtain mist elimination test image and mist elimination contour images, substitute described test image and Described contour images, inputs described image processor by described mist elimination test image and mist elimination contour images 3。

Then, with reference to Fig. 2, the room to the outdoor electrical energy meter fault self-verifying method implementing the present invention Outer electrical energy meter fault checks the concrete structure of an embodiment of terminal to carry out further automatically Bright.

Described inspection terminal also includes: power supply, including solar powered device, battery, cuts Change switch and electric pressure converter, described switching switch and described solar powered device and described battery Connect respectively, according to battery dump energy decide whether to be switched to described solar powered device with by Described solar powered device is powered, and described electric pressure converter is connected with described switching switch, leading to The 5V voltage crossing switching switch input is converted to 3.3V voltage.

Described inspection terminal also includes: reset unit, for by each electronics in described inspection terminal Parts return to default conditions, and the default conditions of each electronic unit described are described inspection terminal manufacture The state that manufacturer sets when described inspection terminal is dispatched from the factory.

Described inspection terminal also includes: static memory, for prestoring the electric energy meter of various species Benchmark image template, the benchmark image template of the electric energy meter of each kind is to each kind Benchmark electric energy meter shoots obtained pattern in advance, and described static memory has also prestored electric energy meter Information table, described electric energy meter information table, with electric energy meter kind for index, saves each electric energy meter Infrared communication address, test character string, character upper limit gray threshold and character lower limit gray threshold, institute State character upper limit gray threshold and described character lower limit gray threshold for by kind electricity corresponding in image Character on the display screen of energy table separates with image background.

Described inspection terminal also includes: alarm appliance, is connected with described ARM11 processor 4, bag Including loudspeaker and warning LED, described loudspeaker is corresponding with described failure alarm signal for playing Language warning file, described warning LED is red for showing when receiving described failure alarm signal Look, shows green when receiving fault-free cue.

Described CCD high-definition camera 2 is for shooting the display screen of described detected electric energy meter With output test image, it is additionally operable to shoot to export profile to the profile of described detected electric energy meter Image, the resolution ratio of described test image and described contour images is all 1920 × 1080.

Described inspection terminal also includes: go haze processing equipment 5, is positioned at described CCD high-definition camera Between 2 and described image processor 3, it is used for receiving described test image and described contour images, right Described test image and described contour images carry out respectively mist elimination process with obtain mist elimination test image and Mist elimination contour images, substitutes described test image and described contour images, and described mist elimination is tested image Described image processor 3 is inputted with mist elimination contour images.

As it is shown on figure 3, the described parts going haze processing equipment 5 are illustrated.

Described go haze processing equipment 5 to include: haze Concentration Testing subset 51, be positioned in air, For the haze concentration of the detected electric energy meter position of detection in real time, and determine mist according to haze concentration Haze removes intensity, and described haze removes intensity value between 0 to 1.

Described haze processing equipment 5 is gone to include: overall air light value obtains subset 52, with described CCD high-definition camera 2 connects to obtain described test image, calculates each picture in described test image The gray value of element, using the gray value of pixel maximum for gray value as overall air light value.

Described haze processing equipment 5 is gone to include: atmospheric scattering light value obtains subset 53, with described CCD high-definition camera 2 and described haze Concentration Testing subset 51 connect, respectively to described test Each pixel of image, extracts its R, G, B tri-in Color Channel pixel value minimum of a value as mesh Mark pixel value, uses Gaussian filter EPGF (the edge-preserving gaussian keeping edge Filter) it is filtered described target pixel value processing to obtain filtered target pixel value, by target picture Element value deducts filtered target pixel value to obtain object pixel difference, and EPGF is poor to object pixel in use Value is filtered processing to obtain filtered target pixel value difference, and filtered target pixel value is deducted filtering mesh Mark pixel value difference removes a reference value to obtain haze, haze is removed intensity and is multiplied by haze removal a reference value To obtain haze removal threshold value, take haze and remove the minimum of a value in threshold value and target pixel value as comparing Reference value, takes the atmospheric scattering light value as each pixel of the maximum in comparison reference and 0.

Described haze processing equipment 5 is gone to include: medium transmission rate obtains subset 54, with described entirety Air light value obtains subset 52 and described atmospheric scattering light value obtains subset 53 and connects respectively, will The atmospheric scattering light value of each pixel to obtain except value, deducts described divided by overall air light value by 1 Except value is to obtain the medium transmission rate of each pixel.

Described haze processing equipment 5 is gone to include: sharpening Image Acquisition subset 55, with described CCD High-definition camera 2, described overall air light value obtain subset 52 and described medium transmission rate obtains sub Equipment 54 connects respectively, deducts the medium transmission rate of each pixel by 1 to obtain the first difference, Described first difference is multiplied by overall air light value to obtain product value, by each in described test image The pixel value of individual pixel deducts described product value to obtain the second difference, by described second difference divided by often The medium transmission rate of one pixel to obtain the sharpening pixel value of each pixel, described test image In the pixel value of each pixel include the R of each pixel in described test image, G, B tri-face Chrominance channel pixel value, correspondingly, it is thus achieved that the sharpening pixel value of each pixel include each picture The R of element, G, B tri-Color Channel sharpening pixel value, the sharpening pixel value composition of all pixels Mist elimination test image.

The described mist elimination processing mode going haze processing equipment 5 that described contour images is carried out with to described The mist elimination processing mode that test image is carried out is identical.

Described image processor 3 goes haze processing equipment 5 to be connected with described, knows including electric energy meter type Other unit, contrast enhancement unit, median filter unit, gray processing processing unit, Character segmentation list Unit and character recognition unit.

Described electric energy meter type identification unit removes haze processing equipment 5 and described static memory with described Connect respectively, by the benchmark image template of described mist elimination contour images Yu the electric energy meter of described various species Mate one by one, using electric energy meter type corresponding for the benchmark image template that the match is successful as determining electric energy meter Type exports in described static memory and preserves.

Described contrast enhancement unit is connected to test described mist elimination with described CCD high-definition camera Image carries out contrast enhancement processing, strengthens image to obtain.

Described median filter unit is connected to enter described enhancing image with described contrast enhancement unit Row medium filtering processes, to obtain filtering image.

Described gray processing processing unit is connected with described median filter unit, carries out described filtering image Gray processing processes, to obtain gray level image.

Described Character segmentation unit connects respectively with described gray processing processing unit and described static memory Connect, gray value in described gray level image is being determined character upper limit gray threshold and determined character lower limit Pixel identification between gray threshold also forms multiple character subgraph.

Described character recognition unit is connected with described Character segmentation unit, identifies based on predetermined OCR Algorithm identifies the character that each character subgraph is corresponding, and according to each character subgraph in institute State multiple characters that the position in gray level image will identify that to be combined, to obtain described identification word Symbol string.

Unit, the described static state of described ARM11 processor 4 and described image processor 3 are deposited Reservoir, described CCD high-definition camera 2 and described infrared transceiver 1 connect respectively, first control Described CCD high-definition camera 2 shoots described contour images, goes haze processing equipment 5 described in control Described contour images is carried out mist elimination process, controls described electric energy meter type identification unit and identify described Determine electric energy meter type, subsequently, determined electric energy meter type look into based on described in described static memory Look for described electric energy meter information table, with obtain described in determined infrared communication address corresponding to electric energy meter type, Test character string, character upper limit gray threshold and character lower limit gray threshold are the most infrared respectively as determining Mailing address, location survey examination character string, determine character upper limit gray threshold and determined character lower limit gray scale Threshold value is saved in static memory, controls described infrared transceiver 1 to having with determining infrared communication The detected electric energy meter of location send include described in the test signal of location survey examination character string, in order to described Detected electric energy meter controls the examination character string of location survey that its display screen shows that described test signal includes.

Described ARM11 processor 4 controls described CCD high-definition camera 2 after Preset Time and shoots Test image, described in control, go haze processing equipment 5 that described test image is carried out mist elimination process, and Start described contrast enhancement unit, described median filter unit, described gray processing processing unit, institute State Character segmentation unit and described character recognition unit to obtain described identification string, and by described knowledge Other character string matches with the examination of the location survey character string of preservation in described static memory, and the match is successful then Sending fault-free cue, it fails to match then sends failure alarm signal.

Wherein, described detected electric energy meter receive include described in location survey examination character string test letter Number time, use its internal memory to preserve its current reading in real time, in order at it after test ending Its current reading is recovered on display screen.

Wherein, in described inspection terminal, alternatively, described electric energy meter type identification unit, described Contrast enhancement unit, described median filter unit, described gray processing processing unit, described character divide Cut unit and described character recognition unit is respectively adopted different fpga chips and realizes.

Wherein, in described inspection terminal, alternatively, described inspection terminal can also include: bar shaped Code resolver, with the bar code posted on the detected electric energy meter of detection, it is thus achieved that corresponding detected electricity The address name of energy table ownership and station address;Wireless communication interface, with described ARM11 processor 4 and described bar code resolver connect, with when receiving described failure alarm signal by described user Name and described station address are wirelessly transmitted to the power supply management platform of far-end;Shooting secondary light source, bag Including luminance sensor and lighting source, described luminance sensor is used for detecting ambient brightness, described illumination Light source is connected with described luminance sensor, for based on described ambient brightness adjust its provide, be used for The illumination light intensity of auxiliary CCD high-definition camera 2 shooting.

It addition, haze image can remove haze by what a series of images processing equipment realized image, To obtain the image of sharpening, improve the visibility of image.These image processing equipments perform not respectively Same image processing function, the principle formed based on haze, reach to remove the effect of haze.Haze figure The sharpening of picture processes all has great using value, military domain bag for dual-use field Including military and national defense, remote sensing navigation etc., civil area includes road monitoring, target following and automatic Pilot Deng.

The process that haze image is formed can be described by atmospheric attenuation process, in haze image and reality The medium of the available overall air light value of the relation between image i.e. sharpening image and each pixel passes Defeated rate is stated, i.e. in the case of known haze image, according to overall air light value and each picture The medium transmission rate of element, can solve sharpening image.

There are some and have in the solving of medium transmission rate for overall air light value and each pixel Effect and through the means of checking, such as, for the medium transmission rate of each pixel, need to obtain whole Body atmosphere light value and the atmospheric scattering light value of each pixel, and the atmospheric scattering light value of each pixel Can be at the Gaussian smoothing that each pixel pixel value in haze image is carried out twice holding edge Filtering and obtain, therebetween, the intensity that haze is removed is adjustable;And the acquisition pattern of entirety air light value has Two kinds, a kind of mode is, (i.e. can make in haze image by obtaining the black channel of haze image The black channel value of some pixels is the lowest, black channel is R, and G, B tri-is in Color Channel A kind of), in haze image, the multiple pixels bigger than normal by finding black channel pixel value are found The pixel of gray value maximum obtains, and gray value that will search out, gray value is maximum pixel is made For overall air light value, participate in the sharpening of each pixel in haze image and process;It addition, it is overall Air light value also can obtain in the following manner: calculates the gray value of each pixel in haze image, will The gray value of the pixel that gray value is maximum is as overall air light value.

Relation between concrete haze image and real image i.e. sharpening image, and parameters Between relation can be found in above content.

By the discussion to haze image formation basic theory, build between haze image and sharpening image Relation, represent this relation by multiple parameters, subsequently by the multiple parameter values obtained and haze figure The image that picture the most reducible acquisition definition is higher, owing to some statistical means have been used in the acquisition of parameter And empirical means, the image that the most described definition is higher can not be fully equivalent to real image, but Have and considerable degree of gone haze effect, provide effectively for the every field operation under haze weather Ensure.

It addition, infrared communication is a kind of communication mode utilizing infrared transmission information, can be used for passing The information such as defeated language, word, data, image.The angle of infrared transmission has certain limitations, infrared Line wave-length coverage is 0.70 μm-1mm, and wherein the ripple in 300 μm-1mm regions is also referred to as submillimeter wave. The impact that infrared radiation transmission is mainly is absorbed and scattering by air.

Infrared communication is the infrared ray the utilizing 950nm near infrared band media as transmission information, i.e. Communication channel.Base band binary signal is modulated to a series of burst signal by transmitting terminal, by red Infrared signal launched by emission pipe.The light arteries and veins received is converted into the signal of telecommunication by receiving terminal, then through putting Greatly, filtering etc. give demodulator circuit after processing and be demodulated, export after being reduced to binary digital signal. Conventional having realizes the pulsewidth modulation (PWM) of signal modulation by pulse width and passes through train of pulse Between time interval realize signal modulation two kinds of methods of pulse time modulation (PPM).

Infrared-ray communication technology comprise following specification: IrPHY, IrLAP, IrLMP, IrCOMM, TinyTP, IrOBEX, IrLAN and IrSimple.

The outdoor electrical energy meter fault using the present invention checks terminal automatically, lacks for existing outdoor electric energy meter Sunken detection technique detection efficiency is low, detection difficulty big and cannot overcome the technology of adverse weather conditions Problem, first identifies the type of detected electric energy meter, then determines different inspections according to electric energy meter type Survey strategy, wherein use infrared communication technique to ensure the information between detected electric energy meter and inspection terminal Alternately, finally remove the haze weather impact on electric energy meter test image, thus realize all kinds of outdoors The non-broken string of electric energy meter display defect, high-precision quick inspection.

Although it is understood that the present invention discloses as above with preferred embodiment, but above-mentioned enforcement Example is not limited to the present invention.For any those of ordinary skill in the art, without departing from Under technical solution of the present invention ambit, all may utilize the technology contents of the disclosure above to the technology of the present invention Scheme makes many possible variations and modification, or is revised as the Equivalent embodiments of equivalent variations.Therefore, Every content without departing from technical solution of the present invention, the technical spirit of the foundation present invention is to above example Any simple modification, equivalent variations and the modification done, all still falls within technical solution of the present invention protection In the range of.

Claims (1)

1. an outdoor electrical energy meter fault self-verifying method, comprising: utilize infrared transceiver to Detected electric energy meter sends test signal, in order to described detected electric energy meter controls its display screen and shows The test character string that described test signal includes;Utilize CCD high-definition camera to described detected electricity The display screen of energy table carries out shooting with output test image;Utilize image processor to described test image Carry out image procossing, to identify the character string in described test image and to export as identification string; ARM11 processor is utilized to be compared with described test character string by described identification string, with really Determine whether send failure alarm signal;
Described CCD high-definition camera also profile to described detected electric energy meter shoots with output Contour images, the resolution ratio of described test image and described contour images is all 1920 × 1080;
Farther include that described test image and described contour images carry out mist elimination respectively to process to obtain Obtain mist elimination test image and the step of mist elimination contour images;
The method be utilize include infrared transceiver, CCD high-definition camera, image processor and The outdoor electrical energy meter fault of ARM11 processor checks terminal to implement automatically, wherein said infrared receiving/transmission Device is for sending test signal to detected electric energy meter, in order to described detected electric energy meter controls it and shows Display screen shows the test character string that described test signal includes, described CCD high-definition camera is for right The display screen of described detected electric energy meter carries out shooting with output test image, described image processor with Described CCD high-definition camera connects, for described test image is carried out image procossing, to identify Character string in described test image also exports as identification string, described ARM11 processor with Described image processor connects, for being compared with described test character string by described identification string Relatively, to determine whether to send failure alarm signal;
Described CCD high-definition camera also profile to described detected electric energy meter shoots with output Contour images;
Described inspection terminal also includes:
Power supply, including solar powered device, battery, switching switch and electric pressure converter, Described switching switch is connected, according to battery respectively with described solar powered device and described battery Dump energy decides whether to be switched to described solar powered device with by described solar powered device Power supply, described electric pressure converter is connected with described switching switch, with by the 5V by switching switch input Voltage is converted to 3.3V voltage;
Reset unit, for each electronic unit in described inspection terminal is returned to default conditions, The default conditions of each electronic unit described are that described inspection terminal manufacturer is in described inspection terminal The state set when dispatching from the factory;
Static memory, for prestoring the benchmark image template of the electric energy meter of various species, each The benchmark image template of the electric energy meter of individual kind is that the benchmark electric energy meter to each kind shoots in advance The pattern obtained, described static memory has also prestored electric energy meter information table, described electric energy meter Information table, with electric energy meter kind for index, saves the infrared communication address of each electric energy meter, test Character string, character upper limit gray threshold and character lower limit gray threshold, described character upper limit gray threshold With described character lower limit gray threshold for by the word on the display screen of kind electric energy meter corresponding in image Symbol separates with image background;
Alarm appliance, is connected with described ARM11 processor, including loudspeaker and warning LED, Described loudspeaker is for playing the language warning file corresponding with described failure alarm signal, described warning LED, for showing redness when receiving described failure alarm signal, is receiving fault-free prompting Green is shown during signal;
Go haze processing equipment, between described CCD high-definition camera and described image processor, For receiving described test image and described contour images, to described test image and described contour images Carry out mist elimination respectively to process to obtain mist elimination test image and mist elimination contour images, substitute described test figure Picture and described contour images, input described mist elimination test image and mist elimination contour images at described image Reason device;
Described haze processing equipment is gone to include:
Haze Concentration Testing subset, is positioned in air, for the detected electric energy meter place of detection in real time The haze concentration of position, and determine that intensity removed by haze according to haze concentration, intensity removed by described haze Value is between 0 to 1;
Overall air light value obtains subset, is connected to obtain described with described CCD high-definition camera Test image, calculates the gray value of each pixel in described test image, the pixel maximum by gray value Gray value as overall air light value;
Atmospheric scattering light value obtains subset, with described CCD high-definition camera and described haze concentration Detection subset connects respectively, and each pixel to described test image extracts its R, G, B In three Color Channel pixel values, minimum of a value is as target pixel value, uses the Gaussian smoothing filter keeping edge Described target pixel value is filtered processing to obtain filtered target pixel value, by mesh by ripple device EPGF Mark pixel value deducts filtered target pixel value to obtain object pixel difference, and EPGF is to target picture in use Element difference is filtered processing to obtain filtered target pixel value difference, and filtered target pixel value is deducted filter Ripple object pixel difference removes a reference value to obtain haze, haze is removed intensity and is multiplied by haze removal base Quasi-value removes threshold value to obtain haze, takes haze and removes the minimum of a value conduct in threshold value and target pixel value Comparison reference, takes the atmospheric scattering light as each pixel of the maximum in comparison reference and 0 Value;
Medium transmission rate obtains subset, obtains subset and described air with described overall air light value Scattering light value obtains subset and connects respectively, by big divided by entirety for the atmospheric scattering light value of each pixel Gas light value, to obtain except value, deducts described except value is to obtain the medium transmission rate of each pixel by 1;
Sharpening Image Acquisition subset, with described CCD high-definition camera, described overall atmosphere light Value obtains subset and described medium transmission rate obtains subset and connects respectively, deducts each picture by 1 Described first difference, to obtain the first difference, is multiplied by overall air light value to obtain by the medium transmission rate of element Obtain product value, the pixel value of each pixel in described test image is deducted described product value to obtain Second difference, by described second difference divided by the medium transmission rate of each pixel to obtain each picture The sharpening pixel value of element, in described test image, the pixel value of each pixel includes described test figure The R of each pixel in Xiang, G, B tri-Color Channel pixel value, correspondingly, it is thus achieved that each The sharpening pixel value of pixel includes the R of each pixel, G, B tri-Color Channel sharpening pixel Value, the sharpening pixel value composition mist elimination test image of all pixels;
Described image processor goes haze processing equipment to be connected with described, including electric energy meter type identification list Unit, contrast enhancement unit, median filter unit, gray processing processing unit, Character segmentation unit and Character recognition unit, described electric energy meter type identification unit and the described haze processing equipment and described quiet of going State memory connects respectively, by the benchmark of described mist elimination contour images Yu the electric energy meter of described various species Image template mates one by one, using electric energy meter type corresponding for the benchmark image template that the match is successful as Determine electric energy meter type to export in described static memory and preserve, described contrast enhancement unit with Described CCD high-definition camera connects described mist elimination test image is carried out contrast enhancement processing, Strengthening image to obtain, described median filter unit is connected with described contrast enhancement unit with to described Strengthen image and carry out medium filtering process, to obtain filtering image, described gray processing processing unit and institute State median filter unit to connect, described filtering image is carried out gray processing process, to obtain gray processing figure Picture, described Character segmentation unit connects respectively with described gray processing processing unit and described static memory Connect, gray value in described gray level image is being determined character upper limit gray threshold and determined character lower limit Pixel identification between gray threshold also forms multiple character subgraph, described character recognition unit and institute State Character segmentation unit to connect, identify each character subgraph based on predetermined OCR recognizer As corresponding character, and will know according to each character subgraph position in described gray level image The multiple characters not gone out are combined, to obtain described identification string;
Described ARM11 processor and the unit of described image processor, described static memory, Described CCD high-definition camera and described infrared transceiver connect respectively, first control described CCD high Clear camera shoots described contour images, goes haze processing equipment to enter described contour images described in control Row mist elimination process, control described electric energy meter type identification unit identify described in determined electric energy meter type, Subsequently, in described static memory, electric energy meter information described in electric energy meter type search has been determined based on described Table, has determined infrared communication address corresponding to electric energy meter type, test character string, character described in obtaining Upper limit gray threshold and character lower limit gray threshold respectively as determining infrared communication address, location survey Examination character string, determine character upper limit gray threshold and determined character lower limit gray threshold and be saved in static state and deposit In reservoir, control described infrared transceiver and send out to having the detected electric energy meter determining infrared communication address Send the test signal of location survey examination character string described in including, in order to described detected electric energy meter controls it Display screen shows the examination character string of location survey that described test signal includes, described ARM11 processor exists Control described CCD high-definition camera shooting test image after Preset Time, go at haze described in control Reason equipment carries out mist elimination process to described test image, and starts described contrast enhancement unit, described Median filter unit, described gray processing processing unit, described Character segmentation unit and described character recognition Unit is to obtain described identification string, and is protected in described static memory by described identification string The examination of the location survey character string deposited matches, and the match is successful then sends fault-free cue, and it fails to match Then send failure alarm signal;
Described inspection terminal also includes bar code resolver, with posted on the detected electric energy meter of detection Bar code, it is thus achieved that the address name of corresponding detected electric energy meter ownership and station address.
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