CN105891765A - Equipment for intelligent detection of electric meter defects - Google Patents
Equipment for intelligent detection of electric meter defects Download PDFInfo
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- CN105891765A CN105891765A CN201610287028.7A CN201610287028A CN105891765A CN 105891765 A CN105891765 A CN 105891765A CN 201610287028 A CN201610287028 A CN 201610287028A CN 105891765 A CN105891765 A CN 105891765A
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- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 238000012360 testing method Methods 0.000 claims abstract description 71
- 238000004891 communication Methods 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 11
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- 238000005286 illumination Methods 0.000 claims description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/50—Context or environment of the image
- G06V20/52—Surveillance or monitoring of activities, e.g. for recognising suspicious objects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/14—Image acquisition
- G06V30/148—Segmentation of character regions
- G06V30/153—Segmentation of character regions using recognition of characters or words
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
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Abstract
The invention relates to a piece of equipment for intelligent detection of electric meter defects. The equipment comprises an infrared communication interface, a high-definition camera, an image detector and an embedded processor, wherein the infrared communication interface sends a testing signal to a detected electric meter, so that the detected electric meter can control a display screen to display a testing character sting contained by the testing signal; the high-definition camera shoots the display screen of the detected electric meter so as to output a testing image; the image detector is connected to the high-definition camera and is used to process the testing image so as to recognize the character string in the testing image and output the character string as a recognition character sting; and the embedded processor is connected to the image detector and is used to compare the recognition character string with the testing character string so as to determine whether a defect alarm signal shall be sent out. By the equipment provided by the invention, the display defects of the display screen of each electric meter can be detected completely automatically; and manual cost and time cost can be reduced.
Description
The present invention is Application No. 201510100771.2, filing date March 8 in 2015 day,
The divisional application of the patent of bright entitled " ammeter defect Intelligent testing equipment ".
Technical field
The present invention relates to power supply unit management domain, particularly relate to a kind of ammeter defect intellectualized detection and set
Standby.
Background technology
Ammeter, is the abbreviation of electric energy meter, is used to measure the instrument of electric energy, also known as kilowatt-hour meter, energy meter,
Electric energy meter, kilowatt-hour table.Ammeter is power supply management department for detecting each with electric unit or individual
The measuring equipment of used electric energy, is to carry out, to each, the foundation charged with electric unit or individual.
The information spinner of ammeter to be passed on by its display screen.In the production process of ammeter, it shows
Display screen or processing equipment or transmission equipment there will be defect unavoidably, cause the display of display screen not meet pre-
Phase, existing defects, have a strong impact on the reception and registration of metrical information.Therefore, the ammeter reported for repairment is being shown
Whether existing defects is extremely important to determine ammeter to show defects detection.
The ammeter reported for repairment is carried out display defect detection main employing manual detection mode by prior art,
Detection operation is many, and testing staff needs the step complexity of input, and accuracy and the efficiency of detection are the highest,
Even if there being the detection equipment of some electronics, also suffer from that ammeter type is complicated, display defect detection is difficult to
The awkward situation carried out, so, these existing electron detection device poor universality, detection operation is difficult to close
Reason is formulated.
Accordingly, it would be desirable to a kind of new ammeter defect detection equipment based on detection of electrons, substitute complicated low
The manual detection mode of effect, transforms the electron detection device of existing poor compatibility, the completeest
The detection of the display defect of all kinds ammeter in pairs.
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of ammeter defect Intelligent testing equipment, adopt
First the profile of ammeter is detected, to determine the type of ammeter, according to the class of ammeter by image processing techniques
Type determines the parameters that ammeter display defect detects, and uses infrared transmission mode to realize ammeter and inspection
Information between measurement equipment is mutual, improves versatility and the intelligence degree of ammeter defects detection.
According to an aspect of the present invention, it is provided that a kind of ammeter defect Intelligent testing equipment, described inspection
Measurement equipment includes infrared communication interface, high-definition camera, visual detector and flush bonding processor, institute
State infrared communication interface for sending test signal to detected ammeter, in order to described detected ammeter
Controlling the test character string that its display screen shows that described test signal includes, described high-definition camera is used for
The display screen of described detected ammeter is shot with output test image, described visual detector with
Described high-definition camera connects, for described test image being carried out image procossing, to identify described survey
Attempt the character string in picture and export as identification string, described flush bonding processor and described image
Detector connects, for being compared with described test character string by described identification string, to determine
Whether send defect alarm signal.
More specifically, in described ammeter defect Intelligent testing equipment, also include: reset unit,
For each electronic unit in described detection equipment being returned to default conditions, each ministry of electronics industry described
The default conditions of part are the shape that described detection device fabrication manufacturer sets when described detection equipment dispatches from the factory
State；Static memory, for prestoring the benchmark image template of the ammeter of various species, each
The benchmark image template of the ammeter of kind is obtained by shooting the master meter of each kind in advance
Pattern, described static memory has also prestored ammeter information table, and described ammeter information table is with electricity
Table kind is index, saves on the infrared communication address of each ammeter, test character string, character
Limit gray threshold and character lower limit gray threshold, described character upper limit gray threshold and described character lower limit
Gray threshold is for separating the character on the display screen of kind ammeter corresponding in image with image background；
Shooting secondary light source, including luminance sensor and lighting source, described luminance sensor is used for detecting ring
Border brightness, described lighting source is connected with described luminance sensor, for adjusting based on described ambient brightness
Whole its provide, for the illumination light intensity that assists high-definition camera to shoot；Alarm appliance, with described
Flush bonding processor connects, and including speaker and warning LED, described speaker is for playing and institute
State the language warning file that defect alarm signal is corresponding, described warning LED for receive described
Show redness during defect alarm signal, show green when receiving zero defect cue；Described height
Clear photographic head includes optical filter, camera lens and CMOS vision sensor, and described camera lens is positioned at described optical filtering
Position between sheet and described CMOS vision sensor, described high-definition camera is for described tested
The display screen surveying ammeter carries out shooting with output test image, outside being additionally operable to described detected ammeter
Shape carries out shooting to export contour images, and the resolution of described test image and described contour images is all
1920×1080；Described visual detector is connected with described high-definition camera, including ammeter type identification
Unit, contrast enhancement unit, wavelet filtering unit, gray processing processing unit, Character segmentation unit
And character recognition unit, described ammeter type identification unit, described contrast enhancement unit, described little
Ripple filter unit, described gray processing processing unit, described Character segmentation unit and described character recognition list
Unit is respectively adopted different fpga chips and realizes, described ammeter type identification unit and described high definition
Photographic head and described static memory connect respectively, by the electricity of described contour images Yu described various species
The benchmark image template of table is mated one by one, by ammeter type corresponding for the benchmark image template that the match is successful
Exporting in described static memory preserve as determining ammeter type, described contrast strengthens single
First and described high-definition camera is connected described test image is carried out contrast enhancement processing, to obtain
Strengthening image, described wavelet filtering unit is connected with described contrast enhancement unit to strengthen figure to described
As carrying out wavelet filtering process, to obtain filtering image, described gray processing processing unit and described small echo
Filter unit connects, and described filtering image is carried out gray processing process, to obtain gray level image, and institute
State Character segmentation unit to be connected respectively with described gray processing processing unit and described static memory, by institute
State gray value in gray level image determining character upper limit gray threshold and determining character lower limit gray scale threshold
Pixel identification between value also forms multiple character subimage, described character recognition unit and described character
Cutting unit connects, and identifies each character subimage based on predetermined OCR recognizer corresponding
Character, and will identify that according to each character subimage position in described gray level image
Multiple characters are combined, to obtain described identification string；Described flush bonding processor and described figure
As the unit of detector, described static memory, described high-definition camera and described infrared communication
Interface connects respectively, first controls described high-definition camera and shoots described contour images, controls described electricity
Table type identification unit has determined ammeter type, subsequently, base in described static memory described in identifying
Determine ammeter information table described in ammeter type search in described, described in obtaining, determine ammeter type correspondence
Infrared communication address, test character string, character upper limit gray threshold and character lower limit gray threshold also
Respectively as determine infrared communication address, location survey examination character string, determine character upper limit gray threshold and
Determine character lower limit gray threshold to be saved in static memory, control described infrared communication interface to tool
Have determine infrared communication address detected ammeter send include described in location survey examination character string test
Signal, in order to described detected ammeter controls its display screen, and to show that described test signal includes the most fixed
Test character string, described flush bonding processor controls the shooting of described high-definition camera after Preset Time and surveys
Attempt picture, and start at described contrast enhancement unit, described wavelet filtering unit, described gray processing
Reason unit, described Character segmentation unit and described character recognition unit to obtain described identification string,
And the examination of the location survey character string of described identification string with preservation in described static memory is matched,
The match is successful then sends zero defect cue, and it fails to match then sends defect alarm signal.
More specifically, in described ammeter defect Intelligent testing equipment, also include: bar code resolves
Device, with the bar code posted on the detected ammeter of detection, it is thus achieved that corresponding detected ammeter ownership
Address name and address of theenduser.
More specifically, in described ammeter defect Intelligent testing equipment, also include: radio communication connects
Mouthful, it is connected with described flush bonding processor and described bar code resolver, to receive described defect
During alarm signal, described address name and described address of theenduser are wirelessly transmitted to the power supply management of far-end
Platform.
More specifically, in described ammeter defect Intelligent testing equipment, described wireless communication interface without
The power supply management platform that line connects is the server belonging to power supply management department.
More specifically, in described ammeter defect Intelligent testing equipment, also include: usb communication connects
Mouthful, for by the benchmark image template of the ammeter of the various species in outside USB flash disk and ammeter information table
It is forwarded to described static memory preserve.
More specifically, in described ammeter defect Intelligent testing equipment: described Preset Time is 2 seconds.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
Fig. 1 is the structure side according to the ammeter defect Intelligent testing equipment shown in embodiment of the present invention
Block diagram.
Fig. 2 is that the shooting according to the ammeter defect Intelligent testing equipment shown in embodiment of the present invention is auxiliary
Help the block diagram of light source.
Detailed description of the invention
Below with reference to accompanying drawings the embodiment of the ammeter defect Intelligent testing equipment of the present invention is entered
Row describes in detail.
Being widely used of ammeter, 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 ammeter with its electricity consumption amount of real time measure, thus,
The demand of ammeter is big especially, and the market of ammeter is the most active.
Ammeter common on Vehicles Collected from Market can have following several mode classification: (1) is by purposes: work
Industry and utility meters, electronic standard table, maximum demand meter, multi tariff table；(2) by structure and work
Principle: vicarious (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 ammeter display screen as user and report for repairment, or power supply management department peace
When row staff carries out regular maintenance to its ammeter managed, it is required for using ammeter defects detection
Ammeter is checked by equipment, due to ammeter enormous amount, and the therefore detection of ammeter defect detection equipment
Efficiency, accuracy and cost performance are desirable that harshness.Existing manual detection mode or simple electronics inspection
Survey mode can not meet the current demand of power supply management department.
The present invention has built a kind of ammeter defect Intelligent testing equipment, is primarily based on image recognition technology
Judge ammeter type, to take differentiated display defect identification technology based on different types of ammeter,
Infrared communication technique and the introducing of various character recognition technologies targetedly, the completeest simultaneously
The detection of ammeter display defect in pairs.
Fig. 1 is the structure side according to the ammeter defect Intelligent testing equipment shown in embodiment of the present invention
Block diagram, described detection equipment includes infrared communication interface 1, high-definition camera 3, visual detector 4
With flush bonding processor 2, described flush bonding processor 2 and described infrared communication interface 1, described height
Clear photographic head 3 and described visual detector 4 connect respectively, described high-definition camera 3 and described image
Detector 4 connects.
Wherein, described infrared communication interface 1 is for sending test signal to detected ammeter, in order to
Described detected ammeter controls the test character string that its display screen shows that described test signal includes, described
High-definition camera 3 tests image for shooting the display screen of described detected ammeter with output,
Described visual detector 4 with for described test image being carried out image procossing, to identify described test
Character string in image also exports as identification string, and described flush bonding processor 2 is for by described
Identification string compares with described test character string, to determine whether to send defect alarm signal.
Then, continue the concrete structure of the ammeter defect Intelligent testing equipment of the present invention is entered one
The explanation of step.
Described detection equipment also includes: reset unit, for by each electronics in described detection equipment
Parts return to default conditions, and the default conditions of each electronic unit described are described detection device fabrication
The state that manufacturer sets when described detection equipment dispatches from the factory.
Described detection equipment also includes: static memory, for prestoring the ammeter of various species
Benchmark image template, the benchmark image template of the ammeter of each kind is the benchmark to each kind
Ammeter shoots obtained pattern in advance, and described static memory has also prestored ammeter information table,
Described ammeter information table with ammeter kind for index, save each ammeter infrared communication address,
Test character string, character upper limit gray threshold and character lower limit gray threshold, described character upper limit gray scale
Threshold value and described character lower limit gray threshold are for by the display screen of kind ammeter corresponding in image
Character separates with image background.
As in figure 2 it is shown, described detection equipment also includes: shooting secondary light source 5, sense including brightness
Device 51 and lighting source 52, described luminance sensor 51 is used for detecting ambient brightness, described illumination light
Source 52 is connected with described luminance sensor 51, for based on described ambient brightness adjust its provide,
For the illumination light intensity assisting high-definition camera to shoot.
Described detection equipment also includes: alarm appliance, is connected with described flush bonding processor 2, including
Speaker and warning LED, described speaker is for playing the language corresponding with described defect alarm signal
Speech warning file, described warning LED is red for showing when receiving described defect alarm signal
Color, shows green when receiving zero defect cue.
Described high-definition camera 3 includes optical filter, camera lens and CMOS vision sensor, described camera lens
Position between described optical filter and described CMOS vision sensor, described high-definition camera 3
For the display screen of described detected ammeter being shot with output test image, it is additionally operable to described
The profile of detected ammeter carries out shooting to export contour images, described test image and described profile diagram
The resolution of picture is all 1920 × 1080.
Described visual detector 4 is connected with described high-definition camera 3, and described visual detector 4 includes
Ammeter type identification unit, contrast enhancement unit, wavelet filtering unit, gray processing processing unit,
Character segmentation unit and character recognition unit, described ammeter type identification unit, described contrast strengthen
Unit, described wavelet filtering unit, described gray processing processing unit, described Character segmentation unit and institute
State character recognition unit to be respectively adopted different fpga chips and realize.
Described ammeter type identification unit connects respectively with described high-definition camera 3 and described static memory
Connect, described contour images is mated one by one with the benchmark image template of the ammeter of described various species, will
Ammeter type corresponding to the benchmark image template that the match is successful exports described as determining ammeter type
Static memory preserves.
Described contrast enhancement unit is connected to carry out described test image with described high-definition camera 3
Contrast enhancement processing, strengthens image to obtain, and described wavelet filtering unit strengthens with described contrast
Unit connects so that described enhancing image is carried out wavelet filtering process, to obtain filtering image, and described ash
Degreeization processing unit is connected with described wavelet filtering unit, carries out described filtering image at gray processing
Reason, to obtain gray level image, described Character segmentation unit and described gray processing processing unit and described
Static memory connects respectively, and gray value in described gray level image is being determined character upper limit gray scale threshold
Value and the pixel identification determined between character lower limit gray threshold also form multiple character subimage, described
Character recognition unit is connected with described Character segmentation unit, based on predetermined OCR recognizer identification
Go out the character that each character subimage is corresponding, and according to each character subimage at described gray processing
Multiple characters that position in image will identify that are combined, to obtain described identification string.
Described flush bonding processor 2 and the unit of described visual detector 4, described static storage
Device, described high-definition camera 3 and described infrared communication interface 1 connect respectively, first control described height
Clear photographic head 3 shoots described contour images, control described ammeter type identification unit identify described in
Determine ammeter type.
Subsequently, in described static memory, ammeter information described in ammeter type search has been determined based on described
Table, has determined on infrared communication address corresponding to ammeter type, test character string, character described in obtaining
Limit gray threshold and character lower limit gray threshold and 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 storage
In device.
Afterwards, to control described infrared communication interface 1 fixed infrared to having for described flush bonding processor 2
The detected ammeter of mailing address send include described in the test signal of location survey examination character string, in order to
Described detected ammeter controls the examination character string of location survey that its display screen shows that described test signal includes.
Finally, described flush bonding processor 2 controls described high-definition camera 3 after Preset Time and shoots
Test image, and start described contrast enhancement unit, described wavelet filtering unit, described gray processing
Processing unit, described Character segmentation unit and described character recognition unit are to obtain described identification character
String, and by the examination character string phase of location survey of described identification string with preservation in described static memory
Joining, the match is successful then sends zero defect cue, and it fails to match then sends defect alarm signal.
Wherein, described detection equipment can also include: bar code resolver, with the detected ammeter of detection
On the bar code that posted, it is thus achieved that the address name of corresponding detected ammeter ownership and address of theenduser；
Wireless communication interface, is connected with described flush bonding processor 2 and described bar code resolver, to connect
When receiving described defect alarm signal, described address name and described address of theenduser are wirelessly transmitted to far
The power supply management platform of end, the power supply management platform of described wireless communication interface wireless connections can be to supply
Electricity server belonging to administration section.
Wherein, described detection equipment can also include: USB communication interface, for by the USB flash disk of outside
The benchmark image template of ammeter of various species and ammeter information table be forwarded to described static storage
Device preserves, and alternatively, described Preset Time is 2 seconds.
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.
Wherein, IrDA1.0 standard is called for short SIR (Serial Infrared, serial infrared agreement), and he is
A kind of asynchronous, the semiduplex over the horizon communication system developed based on HP-SIR, he is with system
Asynchronous communication transceiver (Universal Asynchronous Receiver/Transmitter, UART)
Rely on, by the waveform compression of serial data pulse and the waveform to the optical signal electric pulse received
Extend this encoding-decoding process (3/16EnDec) and realize infrared data transmission.The maximum data speed of SIR
Rate only has 115.2kbps.In 1996, issued IrDA1.1 agreement, be called for short FIR (FastInfrared,
Fast infrared agreement), use 4PPM (Pulse Position Modulation, displacement modulation)
Coding and decoding mechanism, the maximum data transfer rate can reach 4Mbps, retains 1.0 marks when low speed simultaneously
Accurate regulation.Afterwards, IrDA is proposed again highest communication speed VFIR (the Very Fast at 16Mbps
Infrared) technology, and include IrDA1.1 standard in as supplementing.
IrDA standard all includes three basic specifications and agreement: infrared physical layer connects specification IrPHY
(Infrared Physical Layer Link Specification), infrared connection access protocal IrLAP
(Infrared Link Access Protoco1) and infrared connection management agreement IrLMP Infrared Link
Management Protoco1).IrPHY specification worked out target in infrared communication hardware designs and
Requirement；IrLAP and IrLMP is two software layers, is responsible for being configured connection, manage and safeguarding.
On the basis of IrLAP and IrLMP, for some specific infrared communication applications, IrDA is also
Issued the infrared protocol of some higher levels successively, as TinyTP, IrOBEX, IrCOMM,
IrLAN, IrTran-P and IrBus etc..
Use the ammeter defect Intelligent testing equipment of the present invention, for existing ammeter defect detecting technique
Detection efficiency is low, detection poor compatibility and the low technical problem of accuracy of detection, first identifies tested
Survey the type of ammeter, then determine different inspection policies according to ammeter type, wherein use infrared logical
Letter technology ensures that detected information between ammeter and detection equipment is mutual, it is achieved show all kinds of ammeters
The high accuracy of defect, high efficiency fully-automated synthesis.
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 (2)
1. an ammeter defect Intelligent testing equipment, it is characterised in that described detection equipment includes
Infrared communication interface, high-definition camera, visual detector and flush bonding processor, described infrared communication
Interface is for sending test signal to detected ammeter, in order to described detected ammeter controls its display
Screen shows the test character string that described test signal includes, described high-definition camera is for described tested
The display screen surveying ammeter carries out shooting with output test image, and described visual detector is taken the photograph with described high definition
As head connects, for described test image being carried out image procossing, to identify in described test image
Character string also exports as identification string, and described flush bonding processor is with described visual detector even
Connect, for described identification string being compared with described test character string, to determine whether to send
Defect alarm signal.
2. ammeter defect Intelligent testing equipment as claimed in claim 1, it is characterised in that institute
State detection equipment also to include:
Reset unit, for each electronic unit in described detection equipment is returned to default conditions,
The default conditions of each electronic unit described are that described detection device fabrication manufacturer is at described detection equipment
The state set when dispatching from the factory；
Static memory, for prestoring the benchmark image template of the ammeter of various species, each
The benchmark image template of the ammeter of kind is obtained by shooting the master meter of each kind in advance
Pattern, described static memory has also prestored ammeter information table, and described ammeter information table is with electricity
Table kind is index, saves on the infrared communication address of each ammeter, test character string, character
Limit gray threshold and character lower limit gray threshold, described character upper limit gray threshold and described character lower limit
Gray threshold is for separating the character on the display screen of kind ammeter corresponding in image with image background；
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 high-definition camera to shoot that degree adjusts；
Alarm appliance, is connected with described flush bonding processor, including speaker and warning LED, institute
State speaker for playing the language warning file corresponding with described defect alarm signal, described warning
LED, for showing redness when receiving described defect alarm signal, is receiving zero defect prompting
Green is shown during signal；
Described high-definition camera includes optical filter, camera lens and CMOS vision sensor, described camera lens position
Position between described optical filter and described CMOS vision sensor, described high-definition camera is used for
The display screen of described detected ammeter is shot with output test image, is additionally operable to described tested
The profile surveying ammeter carries out shooting to export contour images, described test image and described contour images
Resolution is all 1920 × 1080；
Described visual detector is connected with described high-definition camera, including ammeter type identification unit, right
Know than degree enhancement unit, wavelet filtering unit, gray processing processing unit, Character segmentation unit and character
Other unit, described ammeter type identification unit, described contrast enhancement unit, described wavelet filtering list
Gray processing processing unit first, described, described Character segmentation unit and described character recognition unit are adopted respectively
Realize with different fpga chips, described ammeter type identification unit and described high-definition camera and
Described static memory connects respectively, by the benchmark of described contour images Yu the ammeter of described various species
Image template mates one by one, using ammeter type corresponding for the benchmark image template that the match is successful as the most fixed
Ammeter type exports in described static memory and preserves, and described contrast enhancement unit is with described
High-definition camera connects so that described test image is carried out contrast enhancement processing, strengthens figure to obtain
Picture, described wavelet filtering unit is connected to carry out described enhancing image with described contrast enhancement unit
Wavelet filtering processes, to obtain filtering image, and described gray processing processing unit and described wavelet filtering list
Unit connects, and described filtering image is carried out gray processing process, to obtain gray level image, and described character
Cutting unit is connected respectively with described gray processing processing unit and described static memory, by described gray scale
Change gray value in image determining character upper limit gray threshold and determining between character lower limit gray threshold
Pixel identification and form multiple character subimage, described character recognition unit and described Character segmentation list
Unit connects, and identifies, based on predetermined OCR recognizer, the character that each character subimage is corresponding,
And the multiple words that will identify that according to each character subimage position in described gray level image
Symbol is combined, to obtain described identification string；
Described flush bonding processor and the unit of described visual detector, described static memory,
Described high-definition camera and described infrared communication interface connect respectively, first control described high-definition camera
Shoot described contour images, control described ammeter type identification unit identify described in determined ammeter class
Type, subsequently, has determined ammeter information described in ammeter type search based on described in described static memory
Table, has determined on infrared communication address corresponding to ammeter type, test character string, character described in obtaining
Limit gray threshold and character lower limit gray threshold and 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 storage
In device, control described infrared communication interface and send to having the detected ammeter determining infrared communication address
Described in including, location survey tries the test signal of character string, in order to described detected ammeter controls its display
Screen shows the examination character string of location survey that described test signal includes, described flush bonding processor is when default
Control described high-definition camera shooting test image after between, and start described contrast enhancement unit, institute
State wavelet filtering unit, described gray processing processing unit, described Character segmentation unit and described character to know
Other unit is to obtain described identification string, and by described identification string and described static memory
The examination of the location survey character string preserved matches, and the match is successful then sends zero defect cue, and coupling is lost
Lose, send defect alarm signal；
USB communication interface, for the benchmark image template by the ammeter of the various species in outside USB flash disk
And ammeter information table is forwarded to described static memory and preserves；
Described Preset Time is 2 seconds.
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| CN106970318A (en) * | 2017-04-25 | 2017-07-21 | 金卡智能集团股份有限公司 | Measuring instrument circuit board intelligent test system and intelligent test method |
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| Publication number | Publication date |
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| CN104614701B (en) | 2016-09-14 |
| CN105911508B (en) | 2018-06-26 |
| CN105891765B (en) | 2018-11-13 |
| CN104614701A (en) | 2015-05-13 |
| CN105911508A (en) | 2016-08-31 |
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