CN107679715A - A kind of electric energy meter comprehensive error process merit rating method and evaluation system based on SPC - Google Patents
A kind of electric energy meter comprehensive error process merit rating method and evaluation system based on SPC Download PDFInfo
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Abstract
The present invention relates to a kind of electric energy meter comprehensive error process merit rating method based on SPC, Measure of Process Capability CPK, PPK are introduced during error analysis, by the Measure of Process Capability for calculating each different loads error dot, and it is weighted according to the weight coefficient of different loads, determine the composition error monitor control index of electric energy meter, research characterizes the parameter of single-phase intelligent electric energy meter composition error distribution character, the final regularity of distribution that intelligent electric energy meter output characteristics parameter is calculated, strengthen daily calibrating data analysis, control batch products quality.The present invention establishes a set of comprehensive quality mechanism of control based on SPC for electric energy meter comprehensive error, SPC technologies are applied in electric energy meter comprehensive error process merit rating, reasonably discrimination goes out to influence the enchancement factor and abnormal factorses of the teaching pattern quality, the electric energy meter error verification process is set in statistics controllable state, metering device error level is reached effective management and control all the time.
Description
Technical field
The invention belongs to electric energy metrical field, especially a kind of electric energy meter comprehensive error process merit rating based on SPC
Method and evaluation system.
Background technology
With the input of metering automation calibrating production equipment, large batch of intelligent electric energy meter should by rapid verification popularization
With however, the monitoring to electric energy meter error but remains in the tradition whether single load point tolerance of single electric energy meter transfinites
Monitoring level, lack and effectively evaluating method is established to electric energy meter batch error process ability level.
Statistical Process Control (SPC) technology earliest by AT&T Labs of U.S. Xiu Hate (walter A.Shewhart) in
It is proposed the 1930s, its main applied statistics analysis method is monitored to industrial processes, will adopted in production process
The initial data of collection is transformed into the information of probability expression, and forms a variety of charts.According to the analysis result to chart, go to find shadow
The enchancement factor and abnormal factorses of product quality are rung, and takes corresponding correction or corrective measure, maintains the stabilization of production process
Property, to reach the purpose for improving prouctiveness.It is to be produced with process control chart to monitor product mostly during specific implementation
The mass property in each stage in journey, to ensure that production process is in state in cont rol all the time, so that it is guaranteed that the quality of product
Meet predetermined requirement.SPC is mainly used in the quality monitoring in industrial processes at present, in measurement verification error analysis
Application case it is also very rarely seen.
By retrieving, the disclosed patent document of analogous technical is not found.
The content of the invention
It is an object of the invention in place of overcome the deficiencies in the prior art, there is provided a kind of electric energy meter comprehensive based on SPC misses
Poor process capability evaluation method and evaluation system.
The present invention solves its technical problem and takes following technical scheme to realize:
A kind of electric energy meter comprehensive error process merit rating method based on SPC, it is characterised in that:Specifically include following step
Suddenly:
(1) the specific management and control scheme of electric energy meter comprehensive error process ability is formulated, calculates SPC control thresholdings;
(2) error information in verification process is gathered;
(3) error information collected is input to data processing centre, calculates the electric energy meter corresponding to gathered data
Composition error Measure of Process Capability;
(4) compared with electric energy meter comprehensive error process Capability index being controlled into thresholding with SPC, judge that electric energy meter comprehensive misses
Whether poor Measure of Process Capability is in normal range (NR).
Moreover, the implementation steps of the specific management and control scheme of step (1) the electric energy meter comprehensive error process ability are:
1. electric energy meter comprehensive error process Capability index computation model is generated, by calculating each different loads error dot
Measure of Process Capability, and be weighted according to the weight coefficient of different loads, determine the comprehensive of each different loads error dot
Error process indexes of capability evaluation is closed, draws the regularity of distribution of electric energy meter output characteristics parameter;
2. determining critical error controlling unit, and corresponding error quality management and control point and corresponding Quality Control parameter are set;
3. decomposing the evaluation index of electric energy meter comprehensive error process ability, electric energy meter on each error quality management and control point is determined
The acquisition method of composition error data;
4. establish the corresponding relation of each evaluation index of composition error process capability and SPC Quality Control parameters;
5. the type of SPC control figures is selected according to the classification of SPC Quality Control parameters;The figure of SPC control figures include variogram,
Characteristic pattern and performance map;
6. calculating the control thresholding of SPC control figures corresponding to each evaluation index, it is placed in memory.
Moreover, the step (3), on display module, provides SPC corresponding to electric energy meter comprehensive error process Capability index
SPC control thresholding marks corresponding to error information coordinate and SPC the control thresholding of control figure, intuitively error in judgement data are
It is no to exceed control thresholding.
Moreover, the step (4), by judging, alerts if electric energy meter comprehensive error process energy mechanical mass is abnormal
Device sends alarm signal;If electric energy meter comprehensive error process ability is in normal range (NR), evaluation or further optimization are completed.
Moreover, after the step (4) obtains judged result, for finding electric energy meter comprehensive error process energy mechanical mass not just
Normal situation, sending alarm signal simultaneously, distinguishing enchancement factor or abnormal factorses cause:If a enchancement factors are drawn
Rise, then the specific management and control implementation process of electric energy meter comprehensive error process ability;If b abnormal factorses cause, then institute's electric energy is changed
The implementation process of table composition error process capability, avoids the generation of anomalous event.
A kind of electric energy meter comprehensive error process merit rating system based on SPC, it is characterised in that:Adopted including error information
Collect module, data processing centre and data storage, the output end connection Data processing of the error information acquisition module
The heart, data processing centre pass through data wire and data storage data interchange;
Data processing centre calculates SPC corresponding to SPC Quality Control parameter values according to SPC technologies and controls thresholding to be placed in data
In memory, also, data processing centre's application error data collecting module collected to error information to calculate electric energy meter comprehensive
Error process Capability index is closed, then electric energy meter comprehensive error process Capability index and SPC are controlled into thresholding by SPC different rule of sentencing
It is compared, draws electric energy meter comprehensive error process merit rating result.
Moreover, the data processing centre includes electric energy meter comprehensive error process merit rating module, Quality Control parameter calculates
Module, judgement and analysis of causes module, performance optimization computing module;
Electric energy meter comprehensive error process merit rating module includes the complete error data to be evaluated electric energy meter error, fortune
The row software module can generate a specific initial error data, subsequently be calculated according to the data;
Quality Control parameter calculating module includes assembly average, variance/variation, range, mode, the standard for calculating gathered data
The relevant performance parameter of difference and SPC quality control device;
Judge to include differentiating whether electric energy meter comprehensive error process energy mechanical mass is in normal condition with analysis of causes module
And the analysis of the reason in abnormal condition and lookup;
Performance optimizes computing module according to the data that history data store module provides to electric energy meter comprehensive error process energy
The Quality Control parameter that mechanical mass is in normal condition optimizes adjustment.
Moreover, the data processing centre is connected with an alarm device, alarm device by data processing centre to detecting error
The abnormal data of Measure of Process Capability send alarm signal.
Moreover, the output end of the data processing centre is also connected with SPC graph generation modules, for showing SPC control figures,
Data processing centre identifies SPC control thresholdings corresponding to error information coordinate and SPC the control thresholding of SPC control figures together
SPC graph generation modules are transferred to, intuitively whether error in judgement data are beyond control thresholding.
Moreover, historical data processing center connects history data store module, the history data store module is included closely
The SPC historical datas of more than 2 years, SPC historical datas include data hierarchy information, SPC Quality Controls point and the control of electric energy meter error
Threshold parameter list, the Quality Control ginseng of normal condition is in electric energy meter comprehensive error process energy mechanical mass for providing historical data
Number optimizes adjustment.
The advantages and positive effects of the present invention are:
1st, the present invention establishes a set of effectively evaluating method for electric energy meter comprehensive error process ability, by electric energy meter
Link step-up error process capability Quality Control point is examined and determine, collection reflects the subjectivity data and objectivity data of synthetic instruction quality,
Handled by data processing centre, form unified data metric, electric energy meter comprehensive error process ability is obtained effectively
Evaluation.
2nd, the present invention establishes a set of comprehensive quality mechanism of control based on SPC for electric energy meter comprehensive error, by SPC technologies
Applied in electric energy meter comprehensive error process merit rating, reasonably discrimination go out to influence the teaching pattern quality enchancement factor and
Abnormal factorses, the electric energy meter error verification process is set in statistics controllable state, metering device error level is reached all the time
Effective management and control, and can be applicable in all kinds of metering device composition errors.
Brief description of the drawings
Fig. 1 is evaluation method schematic flow sheet of the present invention;
Fig. 2 is the modular structure block diagram of evaluation system in the present invention;
Fig. 3 is the processing center module frame chart in evaluation system.
Embodiment
Tying specific embodiment below, the invention will be further described, and following examples are descriptive, is not to limit
Property, it is impossible to protection scope of the present invention is limited with this.
A kind of electric energy meter comprehensive error process merit rating method based on SPC, referring to shown in accompanying drawing 1, specifically include with
Lower step:
(1) the specific management and control scheme of electric energy meter comprehensive error process ability is formulated;
The specific implementation step of management and control scheme is as follows:
1. generating electric energy meter comprehensive error process Capability index computation model, Measure of Process Capability is introduced in calculating process
CPK, PPK, Measure of Process Capability refer to that process capability meets the degree of technical standard, by calculating each different loads error dot
Measure of Process Capability, and be weighted according to the weight coefficient of different loads, determine the composition error monitoring of electric energy meter
Index, research characterize the parameter of single-phase intelligent electric energy meter composition error distribution character, and intelligent electric energy meter output is finally calculated
The regularity of distribution of characterisitic parameter, strengthen daily calibrating data analysis, control batch products quality;
The calculation of process capability belongs to prior art, and calculation formula is as follows:
Cp=T/ (6* σ)
In formula, T is the tolerance amplitude of the technical specification of process statistics amount, and T=allows maximum (Tu)-permission minimum value
(Tl);σ is the population standard deviation of process statistics amount, can be obtained when process is in stable state;
CPK refers to the short term capability of process
Cpk=MIN (Tu- μ, μ-Tl)/(3* σ)
Under usual condition, the population standard deviation (σ) of mass property Distribution value is unknown, so sample standard deviation should be used
(s) replace;
PPK refers to the long-term ability of process, and its formula same Cp, Cpk is the same, but σ is the standard deviation of whole samples, i.e., etc.
In the standard deviation S of all samples.
2. according to the implementation process of electric energy meter comprehensive error process ability management and control scheme, critical error controlling unit is determined,
And corresponding error quality management and control point and corresponding Quality Control parameter are set;
3. decomposing the evaluation index of electric energy meter comprehensive error process ability, electric energy meter comprehensive on each quality management and control point is determined
The acquisition method of error information and its classification;
4. establish the corresponding relation of each evaluation index of composition error process capability and SPC Quality Control parameters;
5. the type of the classification selection SPC control figures by Quality Control parameter;
The figure of SPC control figures includes variogram, characteristic pattern and performance map, can intuitively be observed by SPC control figures
Whether in normal range (NR);
6. calculating the control thresholding of SPC control figures corresponding to each evaluation index, it is placed in memory;
(2) error information in verification process is collected;
(3) error information that will be collected, is input to data processing centre, calculates electric energy meter comprehensive error process ability
Index, and SPC control figure coordinates corresponding to generation, provide corresponding figure on display module;
(4) compared with electric energy meter comprehensive error process Capability index being controlled into thresholding with SPC, judge that electric energy meter comprehensive misses
Whether poor Measure of Process Capability is in normal range (NR);
The error information coordinate SPC controls thresholding corresponding with SPC control thresholdings of SPC control figures is observed on display module
Mark, intuitively error in judgement data whether can exceed control thresholding.
If it find that electric energy meter comprehensive error process energy mechanical mass is abnormal, then alarm device sends alarm signal, and distinguishes
Go out enchancement factor or abnormal factorses cause:If a enchancement factors cause, then electric energy meter comprehensive error process ability is specific
Management and control implementation process;If b abnormal factorses cause, then the implementation process of institute's electric energy meter comprehensive error process ability is changed, is avoided
The generation of anomalous event;
If electric energy meter comprehensive error process ability is in normal range (NR), evaluation or further optimization can be completed;
Optimization method is the SPC historical datas according to error, and the threshold parameter about SPC control figures is adjusted, contracting
The tolerance amplitude of the technical specification of small process statistics amount, so as to optimize management and control performance, Optimum Synthesis error Capability index evaluation knot
Fruit.
A kind of electric energy meter comprehensive error process merit rating system based on SPC, referring to shown in accompanying drawing 2, including margin of error
According to acquisition module, data processing centre, data storage, history data store module, SPC graph generation modules and alarm device,
Error information acquisition module, data processing centre, data storage are sequentially connected in series, and the output end of data processing centre connects respectively
There are history data store module, SPC graph generation modules and alarm device;
The data transfer that will be collected by way of data acquisition module is manually entering, file imports or database imports
To data processing centre;
Referring to shown in accompanying drawing 3, the statistical Boot for the quantitative data that data processing centre collects using SPC technology for detection
Property, and according to SPC technologies and predetermined composition error process capability quality index, calculate SPC Quality Controls parameter value and corresponding
Control thresholding is placed in data storage, then sentences different rule by electric energy meter comprehensive error process Capability index and control by SPC
Thresholding processed is compared, and data processing centre is by the error information coordinate of SPC control figures and the control thresholding pair of SPC control figures
The SPC control thresholding marks answered are transferred to SPC graph generation modules together, intuitively error in judgement data whether can exceed control
Thresholding processed;
The figure of SPC graph generation modules generation includes variogram, characteristic pattern and performance map;
Alarm device by data processing centre to detecting that the abnormal data of error process Capability index send alarm signal.
The SPC historical datas of the electric energy meter error of the first two years, SPC historical datas are comprised at least in history data store module
Including data hierarchy information, SPC Quality Controls point and control threshold parameter list.
The data processing centre include electric energy meter comprehensive error process merit rating module, Quality Control parameter calculating module,
Judge and analysis of causes module, performance optimization computing module;
Electric energy meter comprehensive error process merit rating module includes the complete error data of the electric energy meter error to be evaluated,
A specific initial error data can be generated by running the software module, subsequently be calculated according to the data;
Quality Control parameter calculating module includes assembly average, variance/variation, range, mode, the standard for calculating gathered data
The relevant performance parameter of difference and SPC quality control device;
Judge to include differentiating whether electric energy meter comprehensive error process energy mechanical mass is in normal condition with analysis of causes module
And the analysis of the reason in abnormal condition and lookup;
Performance optimizes computing module according to the data that history data store module provides to electric energy meter comprehensive error process energy
The Quality Control parameter that mechanical mass is in normal condition optimizes adjustment.
Although disclosing embodiments of the invention for the purpose of illustration, it will be appreciated by those skilled in the art that:Not
Depart from the present invention and spirit and scope of the appended claims in, it is various replace, change and modifications all be it is possible, therefore, this
The scope of invention is not limited to embodiment and accompanying drawing disclosure of that.
Claims (10)
- A kind of 1. electric energy meter comprehensive error process merit rating method based on SPC, it is characterised in that:Specifically include following step Suddenly:(1) the specific management and control scheme of electric energy meter comprehensive error process ability is formulated, calculates SPC control thresholdings;(2) error information in verification process is gathered;(3) error information collected is input to data processing centre, calculates the electric energy meter comprehensive corresponding to gathered data Error process Capability index;(4) compared with electric energy meter comprehensive error process Capability index being controlled into thresholding with SPC, electric energy meter comprehensive error mistake is judged Whether journey Capability index is in normal range (NR).
- 2. the electric energy meter comprehensive error process merit rating method according to claim 1 based on SPC, it is characterised in that: The implementation steps of the specific management and control scheme of step (1) the electric energy meter comprehensive error process ability are:1. electric energy meter comprehensive error process Capability index computation model is generated, by the process for calculating each different loads error dot Capability index, and be weighted according to the weight coefficient of different loads, determine the comprehensive mistake of each different loads error dot Poor process capability evaluation index, draw the regularity of distribution of electric energy meter output characteristics parameter;2. determining critical error controlling unit, and corresponding error quality management and control point and corresponding Quality Control parameter are set;3. decomposing the evaluation index of electric energy meter comprehensive error process ability, electric energy meter comprehensive on each error quality management and control point is determined The acquisition method of error information;4. establish the corresponding relation of each evaluation index of composition error process capability and SPC Quality Control parameters;5. the type of SPC control figures is selected according to the classification of SPC Quality Control parameters;The figure of SPC control figures includes variogram, feature Figure and performance map;6. calculating the control thresholding of SPC control figures corresponding to each evaluation index, it is placed in memory.
- 3. the electric energy meter comprehensive error process merit rating method according to claim 1 based on SPC, it is characterised in that: The step (3), on display module, provide the error of SPC control figures corresponding to electric energy meter comprehensive error process Capability index SPC control thresholding marks corresponding to data coordinates and SPC control thresholdings, intuitively whether error in judgement data are beyond control door Limit.
- 4. the electric energy meter comprehensive error process merit rating method according to claim 1 based on SPC, it is characterised in that: The step (4), by judging, alarm device sends alarm letter if electric energy meter comprehensive error process energy mechanical mass is abnormal Number;If electric energy meter comprehensive error process ability is in normal range (NR), evaluation or further optimization are completed.
- 5. the electric energy meter comprehensive error process merit rating method according to claim 4 based on SPC, it is characterised in that: After the step (4) obtains judged result, for finding the abnormal situation of electric energy meter comprehensive error process energy mechanical mass, sending out Go out alarm signal simultaneously, distinguish enchancement factor or abnormal factorses cause:If a enchancement factors cause, then electric energy meter is comprehensive Close the specific management and control implementation process of error process ability;If b abnormal factorses cause, then institute's electric energy meter comprehensive error process is changed The implementation process of ability, avoid the generation of anomalous event.
- A kind of 6. electric energy meter comprehensive error process merit rating system based on SPC, it is characterised in that:Gathered including error information Module, data processing centre and data storage, the output end connection data processing centre of the error information acquisition module, Data processing centre passes through data wire and data storage data interchange;Data processing centre calculates SPC corresponding to SPC Quality Control parameter values according to SPC technologies and controls thresholding to be placed in data storage In device, also, data processing centre's application error data collecting module collected to error information calculate electric energy meter comprehensive miss Poor Measure of Process Capability, then compared by SPC different regular electric energy meter comprehensive error process Capability index of sentencing with SPC control thresholdings Compared with drawing electric energy meter comprehensive error process merit rating result.
- 7. the electric energy meter comprehensive error process merit rating system according to claim 6 based on SPC, it is characterised in that: The data processing centre includes electric energy meter comprehensive error process merit rating module, Quality Control parameter calculating module, judgement and original Because of analysis module, performance optimization computing module;Electric energy meter comprehensive error process merit rating module includes the complete error data to be evaluated electric energy meter error, and operation should Software module can generate a specific initial error data, subsequently be calculated according to the data;Quality Control parameter calculating module include calculating the assembly average of gathered data, variance/variation, range, mode, standard deviation with And the relevant performance parameter of SPC quality control device;Judge with analysis of causes module include differentiating electric energy meter comprehensive error process energy mechanical mass whether in normal condition and The reason in abnormal condition, is analyzed and searches;Performance optimizes computing module according to the data that history data store module provides to electric energy meter comprehensive error process ability matter Quality Control parameter of the amount in normal condition optimizes adjustment.
- 8. the electric energy meter comprehensive error process merit rating system according to claim 6 based on SPC, it is characterised in that: The data processing centre is connected with an alarm device, and alarm device by data processing centre to detecting error process Capability index not Normal data send alarm signal.
- 9. the electric energy meter comprehensive error process merit rating system according to claim 6 based on SPC, it is characterised in that: The output end of the data processing centre is also connected with SPC graph generation modules, for showing SPC control figures, data processing centre The control thresholding of the error information coordinate of SPC control figures and SPC control figures is transferred to SPC graph generation modules together, directly Ground error in judgement data are seen whether beyond control thresholding.
- 10. the electric energy meter comprehensive error process merit rating system according to claim 6 based on SPC, it is characterised in that: Historical data processing center connects history data store module, and the history data store module includes the SPC of nearly more than 2 years Historical data, SPC historical datas include data hierarchy information, SPC Quality Controls point and the control threshold parameter list of electric energy meter error, The Quality Control parameter for being in normal condition to electric energy meter comprehensive error process energy mechanical mass for providing historical data optimizes tune It is whole.
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