CN105260617B - Instrument measurement methods of risk assessment based on reliability - Google Patents
Instrument measurement methods of risk assessment based on reliability Download PDFInfo
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- CN105260617B CN105260617B CN201510732837.XA CN201510732837A CN105260617B CN 105260617 B CN105260617 B CN 105260617B CN 201510732837 A CN201510732837 A CN 201510732837A CN 105260617 B CN105260617 B CN 105260617B
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Abstract
The present invention relates to Metrology Support technical field, specifically, the present invention relates to a kind of method of the instrument measurement risk assessment based on reliability, it includes, and S1. assesses the exacerbation flexible strategy c of each factor according to the unique characteristics factor of instrument, performance requirement factor, service condition factor these three factorsi；S2. the deadweight flexible strategy w of each factor is calculatedi；S3. the Measurement reliability of instrument is calculated according to the exacerbation flexible strategy of each factor and deadweight flexible strategy, S4. calculates the measurement risk of instrument according to the Measurement reliability of instrument.The present invention provides quantitative basis for the analysis based on the instrument of instrument measurement risk other characteristics.Influence of the reliability design to instrument measurement reliability in instrument application has been taken into full account, has improved the application value of methods of risk assessment of the present invention.
Description
Technical field
The present invention relates to Metrology Support technical field, and in particular to a kind of instrument measurement risk assessment side based on reliability
Method.
Background technology
At present, the method or model do not assessed in instrument measurement field instrument measurement risk directly temporarily.But
It is that in the management of current laboratory instrument, generally accreditation should determine that metering instrument cycle and period verify based on some factors
The frequency.And these factors that the foundation that the frequency determines is verified as metering instrument cycle and period can be regarded as to instrument measurement
The analysis of risk.These factors include unique characteristics, performance requirement and service condition (the national standard JJF 1139- of instrument
2005 4.1)。
But above-mentioned measurement risk analysis has the following disadvantages：1) simply enumerate formulate the metering instrument cycle be considered as
Factor, be not that the measurement risk of instrument in itself is analyzed.2) all analyses are simply referred to factor, do not analyze
The influence degree of each factor and the contribution determined to measurement risk or metering cycle, can not be used to comment instrument measurement risk
Estimate.3) existing analysis is based on without any constraints, does not account for the reliability design feature in applying, lacks application
Meaning.
Simultaneously as also having some specificity analysises to need the specific quantized value based on instrument risk in instrumental analysis, such as may be used
To formulate the metering cycle of instrument according to the measurement risk of instrument, or according to the certain measure of formulation of the measurement risk of instrument or
Improve design, the Measurement reliability of the measuring system where increase instrument.Due in the prior art due to not being directed to instrument
The method of the specific estimation and quantization of risk, obstacle is brought for other specificity analysises of instrument.
The content of the invention
For defect present in prior art, it is an object of the invention to provide a kind of instrument measurement based on reliability
Methods of risk assessment, it can specifically quantify the value-at-risk of instrument.It includes：A kind of instrument measurement risk based on reliability
The method of assessment, it is characterised in that specifically comprise the following steps：
S1. according to the unique characteristics factor of instrument, performance requirement factor, service condition factor these three factors, assess each
The exacerbation flexible strategy c of factori, wherein every kind of factor is bigger to Measurement reliability R influence degree, its exacerbation flexible strategy c assessediMore
Greatly；
S2. according to formulaJ=1,2 ..., m, m are natural number, draw the deadweight flexible strategy w of each factori, i=
1,2,3, wherein, j be each factor specific features quantity, wijFor the assessed value of each factor specific features, each factor specific features
Assessed value preset according to the specific features of each factor；
S3. according to the exacerbation flexible strategy of each factor and deadweight flexible strategy, according to formulaI=1,2 ..., n, R
For the Measurement reliability of instrument, ciFor the exacerbation flexible strategy of each factor, wiFor the deadweight flexible strategy of each factor, i is factor quantity, R0For
Measurement reliability target set in advance, and R0>=90%；
S4. according to formulaThe measurement risk r of instrument is drawn, because instrument is related to Redundancy Design, p is parallel connection
The quantity of instrument, p >=1, and as p=1, r are the measurement risk of single instrument, and during p ＞ 1, r is the measurement of p instrument parallel connection
Risk.
The method of the exacerbation flexible strategy of assessment is：Unique characteristics factor, performance requirement factor are judged according to the classification of instrument, made
Influence degree size with these three factors of situation factor to reliability R, by the exacerbation of the maximum factor of the influence to reliability R
Flexible strategy are set as 1/2, then judge influence degree of the remaining two kinds of factors to reliability R, if remaining two kinds of factors are to reliability R's
Influence degree is identical, then the exacerbation flexible strategy of remaining two kinds of factors is set as into 1/4, if remaining two kinds of factors are to reliability R shadow
The degree of sound is different, then the exacerbation flexible strategy of the reliability R factor having a great influence will be set as with 1/3, the exacerbation power of another factor
Number is set as 1/6.
On the basis of above-mentioned technical proposal, when the meter type is warship marine instrumentation, the unique characteristics factor,
The exacerbation flexible strategy c of performance requirement factor, service condition factoriIt is followed successively by 1/6,1/2,1/3.
On the basis of above-mentioned technical proposal, the specific features of the unique characteristics factor include operation principle feature, knot
Configuration formula feature and material feature used, meanwhile,
When instrumentation principle is chemical classes, the assessed value W of operation principle feature11Value be 0.25, operation principle is not
For chemical formula when, W11Value be 1；
When instrument structure pattern is spring, the assessed value W of structural shape feature12Value be 0.5, structural shape is not
During spring, W12Value be 1；
When material used in instrument uses margin design, the assessed value W of material feature used13Value be 1, material used in instrument
When matter does not use margin design, W13Value be 1/nR, wherein nR is the safety coefficient of Meter Reliability.
On the basis of above-mentioned technical proposal, the specific features of the performance requirement factor include limits of error spy
Sign, measurement reproducibility feature and measurement stability features, meanwhile, it is described when the instrument limits of error use design of Reducing Rating
The estimate W of limits of error feature21It is worth for 1/ λ, wherein λ is instrument derating factor, when not using design of Reducing Rating, W21
It is worth for 1；
The estimate W of measurement reproducibility feature22With the estimate W of measurement stability features23Value be 1.
On the basis of above-mentioned technical proposal, the specific features of the service condition factor include environmental condition feature, made
With frequency characteristic and its maintenance situation feature, wherein,
Impact severity and instrument the overload degree being subject to by instrument, it is by use environment tagsort, it is slight, slight
, medium, fatal and disaster five kinds of environmental characteristics, and the estimate W of five kinds of environmental characteristics31Be followed successively by 1,4/5,
3/5、2/5、1/5；
By instrument frequency of usage, by frequency of usage tagsort for hardly using, be rarely employed, once in a while using, have
When use, commonly using five kinds of frequency of usage features, and the estimate W of five kinds of frequency of usage features32Be followed successively by 1,4/5,
3/5、2/5、1/5；
By its maintenance situation tagsort it is≤3 months, 3-6 months, 6-12 months, 12-24 by the maintenance period of instrument
Individual month and more than 24 months five kinds of maintenance period features, and the estimate W of five kinds of maintenance period features33Be followed successively by 1,4/5,
3/5、2/5、1/5。
Compared with prior art, the advantage of the invention is that：
1) ways and means is provided for instrument measurement risk assessment, also other are special for the instrument based on instrument measurement risk
The analysis of property provides quantitative basis.
2) influence of the reliability design to instrument measurement reliability in instrument application has been taken into full account in the present invention, has been improved
The application value of methods of risk assessment of the present invention.
3) model cannot be only used for the instrument measurement risk assessment using parameter as object in application-specific, be also applied for reality
Test the indoor measurement risk assessment using instrument as object.
4) this method is not required metering instrument data and fruiting quantities, is applicable to the situation that data lack very much
Under.
Brief description of the drawings
Fig. 1 is the instrument measurement methods of risk assessment flow chart of the invention based on reliability.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention provides a kind of instrument methods of risk assessment based on Measurement reliability, and it comprises the following steps：
S1. according to the unique characteristics factor of instrument, performance requirement factor, service condition factor these three factors, assess each
The exacerbation flexible strategy c of factori, wherein every kind of factor is bigger to Measurement reliability R influence degree, its exacerbation flexible strategy c assessediMore
Greatly.
The method of the exacerbation flexible strategy of assessment is：Unique characteristics factor, performance requirement factor are judged according to the classification of instrument, made
Influence degree size with these three factors of situation factor to reliability R, by the exacerbation of the maximum factor of the influence to reliability R
Flexible strategy are set as 1/2, then judge influence degree of the remaining two kinds of factors to reliability R, if remaining two kinds of factors are to reliability R's
Influence degree is identical, then the exacerbation flexible strategy of remaining two kinds of factors is set as into 1/4, if remaining two kinds of factors are to reliability R shadow
The degree of sound is different, then the exacerbation flexible strategy of the reliability R factor having a great influence will be set as with 1/3, the exacerbation power of another factor
Number is set as 1/6.
By taking naval vessels as an example, when the meter type is warship marine instrumentation, the unique characteristics factor, performance requirement because
Element, the exacerbation flexible strategy c of service condition factoriIt is followed successively by 1/6,1/2,1/3.
S2. according to formulaJ=1,2 ..., m, m are natural number, draw the deadweight flexible strategy w of each factori, i=
1,2,3, wherein, j be each factor specific features quantity, wijFor the assessed value of each factor specific features, each factor specific features
Assessed value preset according to the specific features of each factor.
The following detailed description of WiComputational methods.The specific features of unique characteristics factor include operation principle feature, structure
Pattern feature and material feature used, that is to say, that now m values are 3.
When instrumentation principle is chemical classes, the assessed value W of operation principle feature11Value be 0.25, operation principle is not
For chemical formula when, W11Value be 1；
When instrument structure pattern is spring, the assessed value W of structural shape feature12Value be 0.5, structural shape is not
During spring, W12Value be 1；
When material used in instrument uses margin design, the assessed value W of material feature used13Value be 1, material used in instrument
When matter does not use margin design, W13Value be 1/nR, wherein nR is the safety coefficient of Meter Reliability.
The specific features of performance requirement factor include limits of error feature, measurement reproducibility feature and measurement stability
Feature, now m values are also 3.
When the instrument limits of error use design of Reducing Rating, the estimate W of the limits of error feature21It is worth for 1/
λ, wherein λ are instrument derating factor, when not using design of Reducing Rating, W21It is worth for 1；
Because influence of the design of Reducing Rating to instrument measurement repeatability and measurement stability not can determine that therefore, measurement repeats
The estimate W of property feature22With the estimate W of measurement stability features23Value be 1.
The specific features of service condition factor include environmental condition feature, frequency of usage feature and its maintenance situation feature, this
When m values be similarly 3.
Impact severity and instrument the overload degree being subject to by instrument, it is by use environment tagsort, it is slight, slight
, medium, fatal and disaster five kinds of environmental characteristics, and the estimate W of five kinds of environmental characteristics31Be followed successively by 1,4/5,
3/5、2/5、1/5；
By instrument frequency of usage, by frequency of usage tagsort for hardly using, be rarely employed, once in a while using, have
When use, commonly using five kinds of frequency of usage features, and the estimate W of five kinds of frequency of usage features32Be followed successively by 1,4/5,
3/5、2/5、1/5；
By its maintenance situation tagsort it is≤3 months, 3-6 months, 6-12 months, 12-24 by the maintenance period of instrument
Individual month and more than 24 months five kinds of maintenance period features, and the estimate W of five kinds of maintenance period features33Be followed successively by 1,4/5,
3/5、2/5、1/5。
W is determinedij, that is, determined W11、W12、W13；W21、W22、W23And W31、W32、W33Afterwards, according to formulaJ=1,2 ..., m calculates the deadweight flexible strategy w of each factori。
S3. according to the exacerbation flexible strategy of each factor and deadweight flexible strategy, according to formulaI=1,2 ..., n,
Calculate the Measurement reliability R, c of instrumentiFor the exacerbation flexible strategy of each factor, wiFor the deadweight flexible strategy of each factor, i is factor quantity, R0
For Measurement reliability target set in advance, and R0>=90%.
S4. according to formulaThe measurement risk r of instrument is drawn, because instrument is related to Redundancy Design, p is parallel connection
The quantity of instrument, p >=1, and as p=1, r are the measurement risk of single instrument, and during p ＞ 1, r is the measurement of p instrument parallel connection
Risk.
The present invention provides ways and means due to the value-at-risk of energetic instrument for instrument measurement risk assessment, also for
Analysis based on the instrument of instrument measurement risk other characteristics provides quantitative basis.Take into full account simultaneously in instrument application
Influence of the reliability design to instrument measurement reliability, improve the application value of methods of risk assessment of the present invention.The model is not only
Available for the instrument measurement risk assessment in application-specific using parameter as object, it is also applied in laboratory using instrument as object
Measure risk assessment.And metering instrument data and fruiting quantities are not required, are applicable to the situation that data lack very much
Under
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (5)
- A kind of 1. method of the instrument measurement risk assessment based on reliability, it is characterised in that specifically comprise the following steps：S1. according to the unique characteristics factor of instrument, performance requirement factor, service condition factor these three factors, each factor is assessed Exacerbation flexible strategy ci, wherein every kind of factor is bigger to Measurement reliability R influence degree, its exacerbation flexible strategy c assessediIt is bigger；The exacerbation flexible strategy c of assessmentiMethod be：Unique characteristics factor, performance requirement factor are judged according to the classification of instrument, used These three factors of situation factor weigh the exacerbation of the maximum factor of the influence to reliability R to reliability R influence degree size Number is set as 1/2, then judges influence degree of the remaining two kinds of factors to reliability R, if remaining two kinds of factors are to reliability R shadow The degree of sound is identical, then the exacerbation flexible strategy of remaining two kinds of factors is set as into 1/4, if influence of the remaining two kinds of factors to reliability R Degree is different, then the exacerbation flexible strategy of the reliability R factor having a great influence will be set as with 1/3, the exacerbation flexible strategy of another factor It is set as 1/6；S2. according to formulaJ=1,2 ..., m, m are natural number, draw the deadweight flexible strategy w of each factori, i=1,2, 3, wherein, j be each factor specific features quantity, wijFor the assessed value of each factor specific features, each factor specific features are commented Valuation is preset according to the specific features of each factor；S3. according to the exacerbation flexible strategy of each factor and deadweight flexible strategy, according to formulaI=1,2 ..., n, R are instrument The Measurement reliability of table, ciFor the exacerbation flexible strategy of each factor, wiFor the deadweight flexible strategy of each factor, i is factor quantity, R0To be advance The Measurement reliability target of setting, and R0>=90%；S4. according to formulaThe measurement risk r of instrument is drawn, because instrument is related to Redundancy Design, p is instrument in parallel Quantity, p >=1, and as p=1, r is the measurement risk of single instrument, and during p ＞ 1, r is the measurement risk of p instrument parallel connection.
- 2. the method for the instrument measurement risk assessment based on reliability as claimed in claim 1, it is characterised in that：When the instrument When table type is warship marine instrumentation, the unique characteristics factor, performance requirement factor, the exacerbation flexible strategy c of service condition factoriAccording to Secondary is 1/6,1/2,1/3.
- 3. the method for the instrument measurement risk assessment based on reliability as claimed in claim 1, it is characterised in that：It is described itself The specific features of characteristic factor include operation principle feature, structural shape feature and material feature used, meanwhile,When instrumentation principle is chemical classes, the assessed value W of operation principle feature11Value be 0.25, operation principle for change During formula, W11Value be 1；When instrument structure pattern is spring, the assessed value W of structural shape feature12Value be 0.5, structural shape is not spring During formula, W12Value be 1；When material used in instrument uses margin design, the assessed value W of material feature used13Value be 1, material used in instrument is not During using margin design, W13Value be 1/nR, wherein nR is the safety coefficient of Meter Reliability.
- 4. the method for the instrument measurement risk assessment based on reliability as claimed in claim 1, it is characterised in that：The performance It is required that the specific features of factor include limits of error feature, measurement reproducibility feature and measurement stability features, meanwhile,When the instrument limits of error use design of Reducing Rating, the estimate W of the limits of error feature21It is worth for 1/ λ, its Middle λ is instrument derating factor, when not using design of Reducing Rating, W21It is worth for 1；The estimate W of measurement reproducibility feature22With the estimate W of measurement stability features23Value be 1.
- 5. the method for the instrument measurement risk assessment based on reliability as claimed in claim 1, it is characterised in that：The use The specific features of situation factor include environmental condition feature, frequency of usage feature and its maintenance situation feature, wherein,Impact severity and instrument the overload degree being subject to by instrument, it is by use environment tagsort, slight, slight, Medium, fatal and disaster five kinds of environmental characteristics, and the estimate W of five kinds of environmental characteristics31It is followed successively by 1,4/5,3/ 5、2/5、1/5；By instrument frequency of usage, by frequency of usage tagsort for hardly using, be rarely employed, once in a while using, make sometimes With, commonly using five kinds of frequency of usage features, and the estimate W of five kinds of frequency of usage features32Be followed successively by 1,4/5,3/5, 2/5、1/5；It it is≤3 months, 3-6 months, 6-12 months, 12-24 months by its maintenance situation tagsort by the maintenance period of instrument With more than 24 months five kinds of maintenance period features, and the estimate W of five kinds of maintenance period features33Be followed successively by 1,4/5,3/5, 2/5、1/5。
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| CN109598354A (en) * | 2018-09-11 | 2019-04-09 | 李涛 | A kind of ship pressure gauge buret reason classification method |
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| US6907369B1 (en) * | 2003-05-02 | 2005-06-14 | Advanced Micro Devices, Inc. | Method and apparatus for modifying design constraints based on observed performance |
| CN103955613A (en) * | 2014-04-29 | 2014-07-30 | 国家电网公司 | Evaluating method for regional landslide geological disaster risk grading of power grid project |
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