CN104808164B - The measuring system of the table automatic Verification of electricity three and the method for realizing automatic Verification - Google Patents
The measuring system of the table automatic Verification of electricity three and the method for realizing automatic Verification Download PDFInfo
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- CN104808164B CN104808164B CN201510174862.0A CN201510174862A CN104808164B CN 104808164 B CN104808164 B CN 104808164B CN 201510174862 A CN201510174862 A CN 201510174862A CN 104808164 B CN104808164 B CN 104808164B
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Abstract
The present invention relates to instrument calibration field, more particularly to the measuring system and the method for realizing automatic Verification of a kind of table automatic Verification of electricity three, the system includes standard scale and the signal source write to each other respectively with main control computer, the standard scale is program-controlled alternating current-direct current standard scale, the signal source is connected with a tested table, the signal source includes direct-flow voltage regulation source, DC constant current power supply and AC audio programmable power supply, and the direct-flow voltage regulation source, DC constant current power supply and AC audio programmable power supply are connected with tested table.The present invention can realize the full-automatic calibrating to the table of electricity three, greatly improve calibrating efficiency and reliability.
Description
Technical field
The present invention relates to the measuring system during instrument calibration field, more particularly to a kind of table automatic Verification of electricity three
And the method for realizing automatic Verification.
Background technology
The calibrating of the table of electricity three (ammeter, voltmeter, power meter) in actual applications widely, not only quantity
Greatly, and process is numerous and diverse.Because the table of electricity three is generally pointer instrument, and the calibration method of pointer instrument is typically by inspection
Fix the number of workers estimates the difference between pointer scale reading and standard input signal, analyzes and calibrates pointer instrument, is specially：It is logical
Cross human eye and read tested table data, and the information read according to testing person manually adjusts the tested table of signal source order and points to calibrating
Point, manual record and calculates verification result afterwards.The subject matter that this traditional calibration method is present is people's eyes
The precision for surveying readout is low, poor reliability, poor repeatability, and artificial subjective impact is larger.Meanwhile, voltage, electric current, power meter
Calibrating digitization it is whole calculate cumbersome, testing person spend in the most of the time during calibrating use eye to pointer and
In data processing, therefore labor intensity is big, and calibrating efficiency is relatively low.
The content of the invention
It is an object of the present invention to propose a kind of measuring system of table automatic Verification of electricity three and realize the side of automatic Verification
Method, it can realize the full-automatic calibrating to the table of electricity three, greatly improve calibrating efficiency and reliability.
To achieve the above object, the invention provides a kind of measuring system of the table automatic Verification of electricity three, it includes：Respectively
The standard scale and signal source write to each other with main control computer, the standard scale are program-controlled alternating current-direct current standard scale, the letter
Number source is connected with a tested table, and the signal source includes direct-flow voltage regulation source, DC constant current power supply and AC audio programmable power supply, institute
Direct-flow voltage regulation source, DC constant current power supply and AC audio programmable power supply is stated with tested table to be connected.
Specifically, being preset with auto-control software and operational software in the main control computer.
Furthermore, the main control computer also communication link is connected to a camera.
Particularly, the alternating current-direct current standard scale has additional an automatic range switching device, and the alternating current-direct current standard scale passes through this
Automatic range switching device is electrically connected with each signal source respectively.
Further, the automatic range switching device rear end is provided with voltage output end and current output terminal, and tested table passes through
The voltage output end and current output terminal are electrically connected with automatic range switching device.
In the present invention, the signal source, standard scale and camera are equipped with communication interface, signal source, standard scale and shooting
Head is communicated to connect by communication interface thereon and main control computer respectively.
Further, the present invention also provides a kind of measuring system using the described table automatic Verification of electricity three and realized automatically
The method of calibrating, it comprises the following steps：
Step a, main control computer starts automatic detection thread, reads calibrating database information, is read according in database
Tested table inspection setpoint information, switching signal source range and automatic range switching tolerance journey；
Step b, coarse adjustment signal source is distinguished to the tested table calibrating point thread of pause detection nearby by communication interface；
Step c, reads the pointer position information for the tested table that a camera is returned at regular intervals, and according to shooting
The pointer information accurate adjustment that head identification is calculated is detected table to examining and determine a little, makes pointer accurately point at accredited point scale；
Step d, reads standard meter reading, and the current reading of record standard table, while calculating control information, is recorded into data
Storehouse, recovers detection thread and reads next inspection setpoint information；
Calibrating of step e, repeat step a to step the d operation until completing all calibrating points.
In the present invention, the image for the tested table that the camera is collected need to be pre-processed, accurate by operational software
The home position corresponding to tested list index circular arc is calculated, and with Hough transform detection of straight lines principle by source images
Point is mapped onto for cumulative parameter space, realizes the identification to known analytic expression curve.
Closer, the straight line statistics identified is set out, afterwards by all track straight lines calculated
Extreme coordinates are attached with central coordinate of circle, calculate head and the tail two-end-point connecting line angle and track straight length, calculate with
Center of circle connecting line is fitted immediate straight line terminal point information, calculates the angle value of track straight line using terminal point information afterwards, then
Angle value information is sent to auto-control software, by judging that the scale value that angle is mapped realizes that the digitlization of tested table is adopted
Collection.
The present invention can realize the full-automatic calibrating to the table of electricity three, and its uncertainty is smaller with respect to eye recognition and can
To calculate, so greatly reducing the extraneous error introduced in verification process, calibrating efficiency is greatly improved and reliable
Property.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the connection diagram of the measuring system of the table automatic Verification of electricity three in the present invention in specific application；
Fig. 2 is a kind of module diagram of specific embodiment of measuring system of the table automatic Verification of electricity three in the present invention；
Fig. 3 is realizes the principle frame of automatic Verification using the measuring system of the described table automatic Verification of electricity three in the present invention
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in Figure 1, 2, the present invention provides a kind of measuring system of the table automatic Verification of electricity three, and it includes：Respectively with master
Standard scale 20 and signal source 30 that control computer 10 is write to each other, the standard scale 20 is program-controlled alternating current-direct current standard scale 20,
The signal source 30 is connected with a tested table 40, and the signal source 30 includes direct-flow voltage regulation source 32, DC constant current power supply 34 and handed over
Stream audio programmable power supply 36, the direct-flow voltage regulation source 32, DC constant current power supply 34 and AC audio programmable power supply 36 with tested table
40 are connected.Auto-control software 12 and operational software 14 are preset with the main control computer 10, the main control computer 10 is also
Communication link is connected to a camera 16.The present invention gathers picture signal by camera 16, and signal after treatment passes quantized value
Main control computer 10 is passed, main control computer 10 receives the control of the quantized value and realization of each hardware link collection to hardware system
System, and quantized value is calculated, handled and preserved, so as to realize the full-automatic calibrating to the table of electricity three, greatly improve
Calibrating efficiency and reliability.
Default auto-control software 12 and operational software 14 are used to receive the institute of camera 16 in the main control computer 10
The quantized value of collection, realizes the control to hardware, and quantized value is calculated, handled and preserved.It is used as one kind of the present invention
Software in preferred embodiment, the main control computer 10 can be opened using the C++Builder6 instruments of Borland companies
Hair, final purpose is software is had practicality, reliability, ease for use and can be safeguarded autgmentability.C++Builder6 be by
The product that Borland companies release, it, as development language, is object oriented language using C Plus Plus.Its core comes from
Delphi, VCL and Delphi used in it is duplicate.Because it belongs to the quick developing instrument of visualization, so keeping away
The difficulty that C Plus Plus develops Windows program is exempted from, has enabled programmers to more concentrate on energy such as data processing, journey
In terms of sequence reliability, so carrying out the exploitation of software in main control computer 10 from this developing instrument.
In the present invention, the signal source 30, standard scale 20 and camera 16 are equipped with communication interface, signal source 30, standard
Table 20 and camera 16 are communicated to connect by communication interface thereon with main control computer 10 respectively.It is preferred that, the camera
16 can be using the serial high resolution industrial digital cameras of MV-500UC.The camera 16 is connected with main control computer 10, is led to
Cross operational software 14 data collected are sent to auto-control software 12 and realize data exchange, tested table 40 passes through automatic measuring
Journey switch 22 is connected with other hardware units, and the reading information for being detected table 40 is gathered by camera 16.For signal
Source 30, the present invention is in addition to increasing communication interface, in addition it is also necessary to improve the fineness adjustment of signal source so that system software is to signal source
The need for 30 control disclosure satisfy that automatic calibration.Particularly, alternating current-direct current standard scale 20 of the invention has additional an automatic measuring
Journey switch 22, the alternating current-direct current standard scale 20 is electrically connected with each signal source respectively by the automatic range switching device 22.Again
Person, the rear end of automatic range switching device 22 is provided with voltage output end 24 and current output terminal 26, and tested table 40 passes through the voltage
Output end 24 and current output terminal 26 are electrically connected with automatic range switching device 22.The present invention is for standard scale 20 by increasing certainly
Momentum journey switch 22, can not only realize Automatic Control, while ensureing that its degree of accuracy is not affected.Specifically, described
Automatic measuring limit switching is realized by relay after the amount limit information that the identification main control computer 10 of automatic range switching device 22 is sent, this
The precision of Main Regulator is not interfered with if sample.
Standard scale 20, automatic range switching device 22 and each signal source 30 in the present invention can be connect by RS232 communications
Mouthful entering row information with main control computer 10 according to the communication protocol of formulation exchanges, to realize the collection of voltage and current signal and right
The control of signal source.Specifically, can be carried out for signal source 30 it is unidirectionally controlled, send control signal control its gear with, set
The information such as definite value and signal lifting.Double-direction control is carried out to standard scale 20, data is sent and controls it to select measurement function, switching
Range etc., receives arrange parameter information and measurement parameter information that standard scale 20 is returned.Enter for automatic range switching device 22
Row is unidirectionally controlled, sends range handover information.Software receives the quilt that camera 16 is sent by the way that computer application layer is unidirectional simultaneously
The meter reading information of table 40 is examined, signal source 30 is controlled according to the information received, can thus be formed as shown in Figure 3
Closed-loop system.
Further, the present invention also provides a kind of measuring system using the described table automatic Verification of electricity three and realized automatically
The method of calibrating, it comprises the following steps：
Step a, main control computer 10 starts automatic detection thread, reads calibrating database information, is read according in database
The inspection setpoint information of tested table 40 gone out, the range of switching signal source 30 and the range of automatic range switching device 22.
Step b, distinguishes coarse adjustment signal source 30 to tested table 40 calibrating point by RS232 communication interfaces and nearby suspends detection line
Journey.
Step c, the at regular intervals tested table 40 that camera 16 of reading is returned pointer position information, and according to
Camera 16 recognizes that the pointer information accurate adjustment calculated is detected table 40 to calibrating point, makes pointer accurately point to accredited point scale
Place.As a kind of selective embodiment of the present invention, a camera 16 can be read per 0.5s and is returned by starting timer
Pointer position information.
Step d, reads the reading of standard scale 20, and the current reading of record standard table 20, while calculating control information, is recorded into
Database, recovers detection thread and reads next inspection setpoint information.
Calibrating of step e, repeat step a to step the d operation until completing all calibrating points.
Above-mentioned calibration method does not need people to participate in, and is image due to the extraction of pointer dashboard home position data
Recognizer module meat and potatoes, only home position accurate positioning, the precision of subsequent treatment can reach requirement, institute
Accurately calculate the home position corresponding to pointer gauge circular arc first with operational software 14, therefore in the present invention, the shooting
The image of the first 16 tested tables 40 collected need to be pre-processed, and accurately calculating the tested pointer of table 40 by operational software 14 justifies
Home position corresponding to arc.The image of pointer instrument to collecting has been carried out after series of preprocessing, in order to be able to accurate
Orient pointer instrument pointer and calibration information, the present invention is also with Hough transform detection of straight lines principle by source images
Point be mapped onto for cumulative parameter space, realize the identification to known analytic expression curve.Further, identified described
Straight line statistics be set out come, all track straight line extreme coordinates calculated are attached with central coordinate of circle afterwards, calculating
Go out head and the tail two-end-point connecting line angle and track straight length, calculate and be fitted immediate straight line end points letter with center of circle connecting line
Breath, calculates the angle value of track straight line using terminal point information afterwards, then angle value information is sent into auto-control software, leads to
Cross and judge that the scale value that angle is mapped realizes the digital collection for being detected table.
In summary, the measuring system of the table automatic Verification of electricity three of the invention and the method for realizing automatic Verification, it is transported
Calculation amount rationally, fast response time, using central coordinate of circle+Hough transform and afterwards the statistical calculation of algorithm filter out closest
The matched curve of actual value, the higher code that meets of the pointer angle information degree of accuracy calculated using the curve is for the degree of accuracy
It is required that, and relative to eye recognition, its uncertainty can accurately be calculated by analysis, reduce introducing error；Together
When, its method for mapping calibration information by the instrument storehouse established by the angle information identified greatly reduces operand
The response speed during automatic Verification is improved, and the degree of accuracy is high, the characteristics of meeting three table automatic Verification of electricity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (3)
1. a kind of method that measuring system of the table automatic Verification of utilization electricity three realizes automatic Verification, it is characterised in that including with
Lower step：
Step a, main control computer starts automatic detection thread, calibrating database information is read, according to the quilt read in database
Examine table inspection setpoint information, switching signal source range and automatic range switching tolerance journey；
Step b, coarse adjustment signal source is distinguished to the tested table calibrating point thread of pause detection nearby by communication interface；
Step c, reads the pointer position information for the tested table that a camera is returned at regular intervals, and is known according to camera
The pointer information accurate adjustment not calculated is detected table to examining and determine a little, makes pointer accurately point at accredited point scale；
Step d, reads standard meter reading, and the current reading of record standard table, while calculating control information, is recorded into database,
Recover detection thread and read next inspection setpoint information；
Calibrating of step e, repeat step a to step the d operation until completing all calibrating points.
2. the method for realizing automatic Verification using the measuring system of the table automatic Verification of electricity three as claimed in claim 1, it is special
Levy and be, the image for the tested table that the camera is collected need to be pre-processed, accurately calculated by operational software tested
Home position corresponding to list index circular arc, and the point on source images is mapped to use with Hough transform detection of straight lines principle
In cumulative parameter space, the identification to known analytic expression curve is realized.
3. the method for realizing automatic Verification using the measuring system of the table automatic Verification of electricity three as claimed in claim 2, it is special
Levy and be, the curve statistical identified is set out to come, afterwards by all track straight line extreme coordinates and circle calculated
Heart coordinate is attached, and is calculated head and the tail two-end-point connecting line angle and track straight length, is calculated the connecting line with the center of circle
Immediate straight line terminal point information is fitted, the angle value of track straight line is calculated using terminal point information afterwards, then angle value is believed
Breath is sent to auto-control software, by the digital collection for judging the tested table of scale value realization that angle is mapped.
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| CN201510174862.0A CN104808164B (en) | 2015-04-14 | 2015-04-14 | The measuring system of the table automatic Verification of electricity three and the method for realizing automatic Verification |
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| CN201510174862.0A CN104808164B (en) | 2015-04-14 | 2015-04-14 | The measuring system of the table automatic Verification of electricity three and the method for realizing automatic Verification |
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| CN104808164B true CN104808164B (en) | 2017-10-27 |
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| CN109935239B (en) * | 2019-03-15 | 2024-03-29 | 浙江大学城市学院 | Automatic metering verification system and recognition algorithm for audio analysis instrument |
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Granted publication date: 20171027 |