CN101334330A - Method for metering sensitivity of electronic pressure detector - Google Patents

Abstract

The invention relates to a method for measuring the sensitivity of an electronic manometer, which belongs to the technical field of electronic measurement. The method comprises the following steps: a pressure value with the measuring pressure of full scale is selected as base measuring pressure; dynamic calibration to the electronic manometer to be calibrated is carried out respectively under normal temperature, high temperature and low temperature environments; under the condition that three sets of standard pressure-measuring systems and the electronic manometer to be calibrated are all effectively calibrated, an average pressure curve measured by the three sets of standard pressure-measuring systems and the rising edge data of the curve measured by the calibrated electronic manometer are utilized to compute to obtain the sensitivity of calibrated electronic manometer. The method of the invention has simple operation, the calibration only needs to be carried out for three times respectively under the normal temperature, the low temperature and the high temperature, the sensitivity coefficient of the electronic manometer under the three temperature environments can be obtained by the calibration of nine times; compared with the existing measuring method, the method of the invention lowers the calibrating period, improves the working efficiency, reduces the testing expenses and the item cost, has precise and reliable result, and is the result of innovative thinking. The method for measuring the sensitivity of the electronic manometer is worthy of being adopted and generalized in the industry.

Description

The method of metering sensitivity of electronic pressure detector

One. technical field

The method of metering sensitivity of electronic pressure detector disclosed by the invention belongs to electronic measuring technology field, and what be specifically related to is a kind of method of utilizing pressure curve rising edge data metering sensitivity of electronic pressure detector.

Two. background technology

Advantages such as electric voltage detector is applicable to measures cannon gun pressure curve automatically in middle large caliber gun, ammunition emission process, to obtain the interior ballistic parameters of cannon, have the precision height, easy to use.In order to guarantee the measuring accuracy of electric voltage detector, must be before dispatching from the factory through strict dynamic calibration.The dynamic calibration principle is before the calibration electric voltage detector that is calibrated to be placed in the dynamic calibration apparatus, dynamic calibration apparatus is equipped with three standard pressure transducer through the calibration of dynamic perfromance traceability, standard transducer is the 6213BK type standard 1000MPa piezoelectric crystal high pressure sensor of Switzerland Kistler company in this way, standard pressure transducer after the adaptive amplification of charge amplifier by the data acquisition processing system record.Utilize gunpowder to produce the high temperature and high pressure environment suitable with the cannon gun pressure during calibration, the high voltage transient signal of generation acts on standard pressure transducer simultaneously and is calibrated on the electric voltage detector.Standard transducer and electric voltage detector be acquired signal simultaneously, after signal record is intact, read the manograph data by computing machine, carry out data processing, obtain being calibrated the sensitivity coefficient of electric voltage detector with data that standard pressure transducer is surveyed (as the true value of calibration system).According to the equation of gas state, when the pressure that powder burning produces is suitable, its temperature is also suitable, and therefore amplitude sensitivity, dynamic error, the waveform correlation coefficient by relatively drawing can reflect electric voltage detector dynamic perfromance under high temperature, the hyperbaric environment in thorax more exactly.Electric voltage detector just is equivalent to pass through calibration in the thorax in the environment real the penetrating of cannon like this, can guarantee the precision of the gun pressure curve tested.To protect low temperature (40 ℃), protect high temperature (+55 ℃) and protect normal temperature (+20 ℃) 48 hours according to military standard of China before electric voltage detector is calibrated, the system sensitivity of calibration its low temperature, high temperature and normal temperature in dynamic calibration apparatus has avoided variation of ambient temperature to the electric voltage detector Effect on Performance then.Before dispatching from the factory, to pass through electric voltage detector the dynamic calibration test of low temperature 12 times, high temperature 12 times, normal temperature 12 times at least, in the manograph measurement range, evenly choose 4～5 base measuring pressure values under every kind of temperature environment, carry out 3 circulation calibrations, write down the arithmetic mean value y of surge pressure that modular system is surveyed in each calibration test _i, manograph is surveyed high specific paricular value x _iRespectively the test figure under normal temperature, high temperature and the low temperature is carried out linear regression analysis, model is that (y is a modular system surge pressure arithmetic mean value: MPa, x are the electric voltage detector bit values to y=bx+a: bit), calculate the sensitivity coefficient b and a of electric voltage detector under the different temperatures environment.

State of the art situation is: will calibrate at least 36 times before each electric voltage detector dispatches from the factory, if when electric voltage detector and data acquisition system (DAS) integrity problem appear in calibration process, calibration data is invalid, need to recalibrate, normal temperature, high temperature and low temperature may all need to increase the calibration number of times like this.The dynamic calibration cycle of electric voltage detector is very long, and takes very much human and material resources and financial resources.In order to improve the problems referred to above, we have proposed to utilize the method for the rising edge data metering sensitivity of electronic pressure detector of pressure curve, and this method is simple to operate, time saving and energy saving, the result is accurately reliable.This technology has been applied to the dynamic calibration of certain base electric voltage detector, electric voltage detector after the calibration has carried out the test of the real bore pressure of many big guns (bullet) kind in certain target range and certain target range, base, and test data proves: utilize the reliability and the measuring accuracy of the electric voltage detector after this technology is calibrated all can satisfy test request.Test data provides important evidence for the development and the production examination of conventional weapons accurately and reliably.

Three. summary of the invention

The objective of the invention is: provide this method of utilizing the rising edge data metering sensitivity of electronic pressure detector of pressure curve to society, since this method base measuring pressure value near or reach the manograph full scale, only need normal temperature, low temperature, high temperature respectively to calibrate 3 times, totally 9 times, just can obtain the sensitivity coefficient under three kinds of temperature environments of electric voltage detector, practice learns that this method is simple to operate, time saving and energy saving, the result is accurately reliable.

Technical scheme of the present invention is such: the method for this metering sensitivity of electronic pressure detector, technical characterstic is: described this method is to utilize the method for pressure curve rising edge data metering sensitivity of electronic pressure detector, this method is: the force value of selecting electric voltage detector gaging pressure full scale is as base measuring pressure, as the force value of base measuring pressure measurement range selection between electric voltage detector gaging pressure full scale 100%～110%.Under normal temperature, high temperature and low temperature environment, the electric voltage detector that is calibrated is carried out dynamic calibration respectively, all calibrate under the effective situation sensitivity that utilizes three cover standard pressure measuring systems mean pressure curve that records and the electric voltage detector test curve rising edge data metering that is calibrated to draw the electric voltage detector that is calibrated with the electric voltage detector that is calibrated at three cover standard pressure measuring systems.Practice learns that this method is time saving and energy saving, and the result is accurately reliable.

Method according to above-described metering sensitivity of electronic pressure detector, technical characterstic also has: the data that three cover standard pressure measuring system tests are gathered at first adopt the 30kHz cutoff frequency to carry out digital filtering, for example charge amplifier is selected the 200kHz upper cut-off frequency for use, to filter the influence of random noise.Then the image data of three cover standard pressure measuring systems is pressed the equation of linear regression of static calibration:

y _i＝a _i+b _ix

Wherein: selecting y for use is voltage, the mv of unit, a _i, x is pressure, units MPa, constant a _i, b _iBe known quantity, handle respectively, obtain three cover pressure measuring system pressure curve x ₁, x ₂, x ₃Surge pressure x with correspondence _1max, x _2max, x _3max, metering three cover standard pressure measuring system related coefficient ρ each other ₁₂, ρ ₁₃, ρ ₂₃, if three cover test macro related coefficient ρ to each other _Ij〉=0.9997, then this calibrates effectively and adopts this calibration data.ρ _IjBe related coefficient ρ ₁₂, ρ ₁₃, ρ ₂₃Write a Chinese character in simplified form.

According to the method for above-described metering sensitivity of electronic pressure detector, technical characterstic also has: calculate three cover standard pressure measuring system related coefficient ρ each other according to following formula _IjBe ρ ₁₂, ρ ₁₃, ρ ₂₃:

${\mathrm{\ρ}}_{12}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_1\left(t\right)x_2\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_2}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_1}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

${\mathrm{\ρ}}_{13}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_1\left(t\right)x_3\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_3}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_1}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

${\mathrm{\ρ}}_{23}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_2\left(t\right)x_3\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_3}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_2}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

In three formulas: t is the time, integration from+∞～-∞; x ₁(t) be the 1st cover standard pressure measuring system pressure curve, x ₂(t) be the 2nd cover standard pressure measuring system pressure curve, x ₃(t) be the 3rd cover standard pressure measuring system pressure curve.

According to the method for above-described metering sensitivity of electronic pressure detector, technical characterstic also has: arithmetic mean, residual error, residual sum of squares (RSS), standard deviation estimated value, the arithmetic mean standard deviation estimated value of metering three cover System Testing Pressure values

, choose

As the error of modular system mean value, three cover modular systems agreements with $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}\≤0.66\%\mathrm{FS}$ As the error decision principle of modular system, if $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}>0.66\%\mathrm{FS}$ , judge that then this calibration data does not meet as the requirement of calibration system and rejected.Described FS is FullScale.Described arithmetic mean, residual error, residual sum of squares (RSS), standard deviation estimated value, arithmetic mean standard deviation estimated value

Deng being known mathematical prescriptions all, do not do here to state more.

Method according to above-described metering sensitivity of electronic pressure detector, technical characterstic also has: the data that the electric voltage detector test that is calibrated is gathered at first adopt the 30kHz cutoff frequency to carry out the digital filtering processing, and then the electric voltage detector image data that is calibrated handled, obtain test curve yy _i, modular system mean pressure curve y _iMotionless, translation electric voltage detector test curve yy _iEach data point of translation, related coefficient between measurement standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, a translation n data point (n selects arabic numeral 1 above positive integer), reach modular system mean pressure curve and electric voltage detector test curve rising edge degree of agreement is best, obtain related coefficient sequence ρ _j, obtain ρ again _jIn maximal value ρ _Jmax, with this maximal value ρ _JmaxAs the related coefficient between standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, choose this related coefficient ρ _Jmax〉=0.9997, then this calibrates effectively and adopts this calibration data.

According to the method for above-described described metering sensitivity of electronic pressure detector, technical characterstic also has: according to following formula:

${\mathrm{\ρ}}_j\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}\mathrm{yy}(t+j)\stackrel{\‾}{y}\left(t\right)\mathrm{dt}}{{[{\∫}_{-\∞}^{\∞}{\stackrel{\‾}{y}}^2\left(t\right)dt{\∫}_{-\∞}^{\∞}{\mathrm{yy}}^2(t+j)\mathrm{dt}]}^{\frac{1}{2}}},$ In this formula: (n selects arabic numeral 1 to j=0～n

Above positive integer), the electric voltage detector test curve of yy (t+j) after, y for translation j point _i(t) be standard pressure measuring system mean pressure curve, measurement standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween related coefficient sequence ρ _j, get ρ _jIn maximal value ρ _JmaxAs the related coefficient between standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, if electric voltage detector test curve yy _iTranslation j point back standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween the related coefficient maximum, then choose pressure curve y _iRising edge and test curve yy _I+jRising edge data metering sensitivity of electronic pressure detector.

According to the method for above-described metering sensitivity of electronic pressure detector, technical characterstic also has: calibrate under the effective prerequisite with the electric voltage detector that is calibrated at three cover standard pressure measuring systems, at normal pressure test macro mean pressure curve y _iRising edge get n by 15～100% scopes of surge pressure and (select: the arabic numeral positive integer that n＞200 are above) individual data point, composition data sequences y (i), i=1～n; Corresponding test curve yy at electric voltage detector _I+jRising edge get n and (select: the arabic numeral positive integer that n＞200 are above) individual data point, composition data sequence x (i), i=1～n; Two groups of data x (i), y (i) are carried out linear fit, draw work straight-line equation y as adopting least square method to carry out linear fit _Ik=a _Ik+ b _IkX is in the formula: y _IkBe pressure, unit: MPa, a _IkBe intercept, unit: MPa, b _IkBe sensitivity, unit: MPa/LSB, x are the LSB value, and described LSB is Least Significant Bit, and i is the base measuring temperature environment, and k is every kind of test number (TN) under the base measuring temperature environment.

Method according to above-described metering sensitivity of electronic pressure detector, technical characterstic also has: respectively electric voltage detector is calibrated three times under normal, high and low three kinds of temperature environments, draw three groups of work straight-line equations under each temperature environment respectively, to a of three set of equations under the same temperature environment _IkAnd b _IkBe averaged respectively and obtain a _iAnd b _i, just obtain being calibrated the work straight-line equation y under three kinds of temperature environments of manograph _i=a _i+ b _iX, a _iAnd b _iBe the sensitivity of the electric voltage detector that is calibrated under this temperature environment.

Advantage of the present invention has: 1. the method for this metering sensitivity of electronic pressure detector is to select the force value of electric voltage detector gaging pressure full scale as base measuring pressure, as the force value of base measuring pressure measurement range selection between electric voltage detector gaging pressure full scale 100%～110%, only need normal temperature, low temperature, high temperature respectively to calibrate 3 times, totally 9 times, just can obtain the sensitivity coefficient under three kinds of temperature environments of electric voltage detector; 2. compare with the measuring method of prior art, reduced by 75% calibration operation amount after adopting this method, shortened calibration cycle greatly, improved work efficiency, reduced testing expenses, reduced project cost, guaranteed the precision of electric voltage detector; 3. this method is a method of utilizing pressure curve rising edge data metering sensitivity of electronic pressure detector on measuring technology, and it is simple to operate, and the result is accurately reliable, is the innovation and creation of novelty.The method of this metering sensitivity of electronic pressure detector of the present invention is worth adopting and promoting.

Four. description of drawings

Figure of description of the present invention has 1 width of cloth:

Fig. 1 is the flow diagram of metering sensitivity of electronic pressure detector method.

In Fig. 1: 1. beginning; 2. normal or the high or low temperature insulation of electric voltage detector is 48 hours; 3. electric voltage detector is calibrated in calibrating installation by measuring the full scale force value; 4. the data of three cover standard pressure measuring systems are carried out digital filtering, handle respectively again, obtain pressure curve x _iWith surge pressure x _Imax5. measure the related coefficient ρ between three cover standard pressure measuring systems _Ij6. ρ _Ij〉=0.9997? 7. measure arithmetic mean, residual error, residual sum of squares (RSS), standard deviation estimated value, the arithmetic mean standard deviation estimated value of three cover System Testing Pressure values

Deng; $8.2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}\≤0.66\%\mathrm{FS}$ ? 9. the data of electric voltage detector are carried out digital filtering, handle again, obtain electric voltage detector test curve yy _i10. measurement standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween related coefficient sequence ρ _j, obtain maximal value ρ _JmaxIf pressure curve y _iWith the test curve yy that is calibrated _I+jBetween the related coefficient maximum, then choose pressure curve y _iRising edge and test curve yy _I+jRising edge data metering sensitivity of electronic pressure detector; 11. ρ _Jmax〉=0.9997? 12. at pressure curve y _iRising edge get n by 15～100% scopes of surge pressure and (select: the arabic numeral positive integer that n＞200 are above) data point, composition data sequences y (i), i=1～n; Corresponding test curve yy at electric voltage detector _I+jRising edge is got n and (is selected: the arabic numeral positive integer that n＞200 are above) data point, composition data sequence x (i), i=1～n; Two groups of data x (i), y (i) are carried out linear fit, draw work straight-line equation y _Ik=a _Ik+ b _IkX, and draw the sensitivity coefficient b and a of electric voltage detector; 13. three groups of sensitivity coefficient b and a are arranged under three kinds of temperature environments? 14. ask three kinds of sensitivity coefficient mean value a under the temperature environment _iAnd b _i15 finish.

Five. specific embodiments

Non-limiting examples of the present invention is as follows:

Embodiment one. the method for metering sensitivity of electronic pressure detector

The method of the described metering sensitivity of electronic pressure detector of this example is to utilize the method for pressure curve rising edge data metering sensitivity of electronic pressure detector, blanket this method is: the force value of selecting electric voltage detector gaging pressure full scale is as base measuring pressure, as the force value of base measuring pressure measurement range selection between electric voltage detector gaging pressure full scale 100%～110%.Under normal temperature, high temperature and low temperature environment, the electric voltage detector that is calibrated is carried out dynamic calibration respectively, all calibrate under the effective situation sensitivity that utilizes three cover standard pressure measuring systems mean pressure curve that records and the electric voltage detector test curve rising edge data metering that is calibrated to draw the electric voltage detector that is calibrated with the electric voltage detector that is calibrated at three cover standard pressure measuring systems.Practice learns that this method is time saving and energy saving, and the result is accurately reliable.Fig. 1 illustrates the flow diagram of this metering sensitivity of electronic pressure detector method: 1 is beginning; 2 carry out dynamic calibration to the electric voltage detector that is calibrated for being chosen under normal temperature or high temperature or the low temperature environment, select to make under each temperature electric voltage detector insulation 48 hours in turn; 3 is that electric voltage detector is calibrated in calibrating installation by measuring the full scale force value; 4 is the advanced line number word of the image data filtering of three cover standard pressure measuring systems, described digital filtering is at first to adopt the 30kHz cutoff frequency to carry out digital filtering to three image data of overlapping the standard pressure measuring systems, for example charge amplifier is selected the 200kHz upper cut-off frequency for use, to filter the influence of random noise.Then the image data of three cover standard pressure measuring systems is pressed the equation of linear regression of static calibration:

y _i＝a _i+b _ix

Wherein: selecting y for use is voltage, the mv of unit, a _i, x is pressure, units MPa, constant a _i, b _iBe known quantity, handle respectively again, obtain three cover pressure measuring system pressure curve x ₁, x ₂, x ₃Surge pressure x with correspondence _1max, x _2max, x _3max, promptly obtain pressure curve x _iWith surge pressure x _Imax5 are the related coefficient ρ between metering three cover standard pressure measuring systems _Ij, promptly measure three cover standard pressure measuring system related coefficient ρ each other ₁₂, ρ ₁₃, ρ ₂₃, calculate three cover standard pressure measuring system related coefficient ρ each other according to following formula _IjBe ρ ₁₂, ρ ₁₃, ρ ₂₃:

${\mathrm{\ρ}}_{12}\left(\mathrm{\τ}\right)=-\frac{{\∫}_{-\∞}^{\∞}{x}_1\left(t\right)x_2\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_2}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_1}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

${\mathrm{\ρ}}_{13}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_1\left(t\right)x_3\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_3}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_1}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

${\mathrm{\ρ}}_{23}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_2\left(t\right)x_3\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_3}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_2}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

In three formulas: t is the time, integration from+∞～-∞; x ₁(t) be the 1st cover standard pressure measuring system, x ₂(t) be the 2nd cover standard pressure measuring system pressure curve, x ₃(t) be the 3rd cover standard pressure measuring system pressure curve; 6 for judging ρ _Ij〉=0.9997? if three cover test macro related coefficient ρ to each other _Ij〉=0.9997, then this is calibrated effectively and adopts this calibration data, proceeds 7 steps.Otherwise the 2-6 step of reforming; 7 arithmetic mean, residual error, residual sum of squares (RSS), standard deviation estimated value, arithmetic mean standard deviation estimated values for metering three cover System Testing Pressure values

Deng, choose

As the error of modular system mean value, three cover modular systems agreements with $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}\≤0.66\%\mathrm{FS}$ Error decision principle as modular system; 8 for judging $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{X}}\≤0.66\%\mathrm{FS}$ ? described FS is Full Scale.If $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}\≤0.66\%\mathrm{FS},$ Proceed 9 steps.If $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}>0.66\%\mathrm{FS},$ Judge that then this calibration data does not meet as the requirement of calibration system and rejected the 2-8 step of must reforming; 9 handle for the image data of electric voltage detector at first being adopted the 30kHz cutoff frequency carry out digital filtering, and then the electric voltage detector image data that is calibrated is handled, and obtain electric voltage detector test curve yy _i10 is measurement standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween related coefficient sequence ρ _j: according to following formula: ${\mathrm{\ρ}}_j\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}\mathrm{yy}(t+j)\stackrel{\‾}{y}\left(t\right)\mathrm{dt}}{{[{\∫}_{-\∞}^{\∞}{\stackrel{\‾}{y}}^2\left(t\right)dt{\∫}_{-\∞}^{\∞}{\mathrm{yy}}^2(t+j)\mathrm{dt}]}^{\frac{1}{2}}},$ In this formula: j=0～n (n select arabic numeral 1 above positive integer), yy (t+j) the electric voltage detector test curve after for translation j point, y _i(t) be standard pressure measuring system mean pressure curve, measurement standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween related coefficient sequence ρ _j, get ρ _jIn maximal value ρ _JmaxAs the related coefficient between standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, if electric voltage detector test curve yy _iTranslation j point back standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween the related coefficient maximum, then choose pressure curve y _iRising edge and test curve yy _I+jRising edge data metering sensitivity of electronic pressure detector; Three cover modular system mean pressure curve y _iMotionless, translation electric voltage detector curve yy _iEach data point of translation, related coefficient between measurement standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, the individual data point of translation n (n selects arabic numeral 1 above positive integer), reach modular system mean pressure curve and electric voltage detector test curve rising edge degree of agreement is best, obtain related coefficient sequence ρ _j, obtain ρ again _jIn maximal value ρ _Jmax, with this maximal value ρ _JmaxAs the related coefficient between standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated; 11 for judging: ρ _Jmax〉=0.9997? choose this related coefficient ρ _Jmax〉=0.9997, then this is calibrated effectively and adopts this calibration data, proceeds 12 steps.Otherwise the 2-11 step of reforming; 12 steps: if pressure curve y _iWith the test curve yy that is calibrated _I+jBetween the related coefficient maximum, then choose pressure curve y _iRising edge and test curve yy _I+jRising edge data metering sensitivity of electronic pressure detector.At pressure curve y _iRising edge get n (selecting n==201) data point, composition data sequences y (i), i=1～n by 15～100% scopes of surge pressure; Corresponding test curve yy at electric voltage detector _I+jRising edge is got n (selecting n==201) data point, composition data sequence x (i), i=1～n; Two groups of data x (i), y (i) are carried out linear fit, carry out linear fit, draw work straight-line equation y as adopting least square method _Ik=a _Ik+ b _IkX is in the formula: y _IkBe pressure, unit: MPa, a _IkBe intercept, unit: MPa, b _IkBe sensitivity, unit: MPa/LSB, x are the LSB value, and described LSB is Least Significant Bit, and i is the base measuring temperature environment, and k is every kind of test number (TN) under the base measuring temperature environment, draws the sensitivity coefficient b and a of electric voltage detector; 13 steps: three groups of sensitivity coefficient b and a are arranged under three kinds of temperature environments? under normal, high and low three kinds of temperature environments, respectively electric voltage detector is calibrated three times, draw three groups of work straight-line equations under every kind of temperature environment respectively, to a of three set of equations under the same temperature environment _IkAnd b _IkBe averaged respectively and obtain a _iAnd b _i, can obtain being calibrated the work straight-line equation y under three kinds of temperature environments of manograph _i=a _i+ b _iX, a _iAnd b _iBe the sensitivity of the electric voltage detector that is calibrated under this temperature environment; If three groups of sensitivity coefficient b and a are arranged under every kind of temperature environment, repeat the 2-14 step, finish this sensitivity of electronic pressure detector of metering under three kinds of temperature environments; 14 steps: ask three kinds of sensitivity coefficient (mean value) a under the temperature environment _iAnd b _i15 steps: finish.

Embodiment two. the method for metering sensitivity of electronic pressure detector

The method of the described metering sensitivity of electronic pressure detector of this example is the sensitivity that utilizes three cover standard pressure measuring systems mean pressure curve that records and the electric voltage detector test curve rising edge data metering that is calibrated to draw the electric voltage detector that is calibrated.The step of the flow diagram of the method concrete steps metering sensitivity of electronic pressure detector method as shown in Figure 1 that this is routine, the method for this example metering sensitivity of electronic pressure detector and embodiment one difference have: 1. in 12 steps: at pressure curve y _iRising edge by 15～100% scopes of surge pressure get n (select the odd number of 300＞n＞200, as select n==203,205 ..., 297,299 etc.) data point, equally at test curve yy _I+jRising edge get n (select the odd number of 300＞n＞200, as select n==203,205 ..., 297,299 etc.) data point.All the other do not state the method for the metering sensitivity of electronic pressure detector that this is routine, are same as entirely described in the embodiment one, no longer repeat.

Embodiment three. the method for metering sensitivity of electronic pressure detector

The method of the described metering sensitivity of electronic pressure detector of this example is the sensitivity that utilizes three cover standard pressure measuring systems mean pressure curve that records and the electric voltage detector test curve rising edge data metering that is calibrated to draw the electric voltage detector that is calibrated.The step of the flow diagram of the method concrete steps metering sensitivity of electronic pressure detector method as shown in Figure 1 that this is routine, the method for this example metering sensitivity of electronic pressure detector and embodiment one, embodiment two differences have: 1. in 12 steps: at pressure curve y _iRising edge by 15～100% scopes of surge pressure get n (select the even number of 300＞n＞200, as select n==202,204 ..., 296,298 etc.) data point, equally at test curve yy _I+jRising edge get n (select the even number of 300＞n＞200, as select n==202,204 ..., 296,298 etc.) data point.All the other do not state the method for the metering sensitivity of electronic pressure detector that this is routine, are same as entirely described in embodiment one, the embodiment two, no longer repeat.

Embodiment four. the method for metering sensitivity of electronic pressure detector

The method of the described metering sensitivity of electronic pressure detector of this example is the sensitivity that utilizes three cover standard pressure measuring systems mean pressure curve that records and the electric voltage detector test curve rising edge data metering that is calibrated to draw the electric voltage detector that is calibrated.The step of the flow diagram of the method concrete steps metering sensitivity of electronic pressure detector method as shown in Figure 1 that this is routine, the method for this example metering sensitivity of electronic pressure detector and embodiment one～embodiment three differences have: 1. in 12 steps: at pressure curve y _iRising edge by 15～100% scopes of surge pressure get n (select the integer of n＞300, as select n==301,302 ..., 998,999 etc.) data point, equally at test curve yy _I+jRising edge get n (select the integer of n＞300, as select n==301,302 ..., 998,999 etc.) data point.All the other do not state the method for the metering sensitivity of electronic pressure detector that this is routine, are same as entirely described in embodiment one～embodiment three, no longer repeat.

Claims (9)

1. the method for a metering sensitivity of electronic pressure detector, be characterised in that: described this method is to utilize the method for rising edge data metering sensitivity of electronic pressure detector, this method is: the force value of selecting electric voltage detector gaging pressure full scale is as base measuring pressure, respectively at normal temperature, under high temperature and the low temperature environment electric voltage detector that is calibrated is carried out dynamic calibration, all calibrate under the effective situation sensitivity that utilizes three cover standard pressure measuring systems mean pressure curve that records and the electric voltage detector test curve rising edge data metering that is calibrated to draw the electric voltage detector that is calibrated with the electric voltage detector that is calibrated at three cover standard pressure measuring systems.

2. the method for metering sensitivity of electronic pressure detector according to claim 1 is characterised in that: to the image data of the three cover standard pressure measuring systems equation of linear regression by static calibration:

y _i＝a _i+b _ix

Wherein: y selects mv for use, a _i, x selects MPa for use, constant a _i, b _iBe known quantity, handle respectively, obtain three cover pressure measuring system pressure curve x ₁, x ₂, x ₃Surge pressure x with correspondence _1max, x _2max, x _3max, metering three cover standard pressure measuring system related coefficient ρ each other ₁₂, ρ ₁₃, ρ ₂₃, if three cover test macro related coefficient ρ to each other _Ij〉=0.9997, then this calibrates effectively and adopts this calibration data.

3. the method for metering sensitivity of electronic pressure detector according to claim 2 is characterised in that: calculate three cover standard pressure measuring system related coefficient ρ each other according to following formula _IjBe ρ ₁₂, ρ ₁₃, ρ ₂₃:

${\mathrm{\ρ}}_{12}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_1\left(t\right)x_2\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_2}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_1}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

${\mathrm{\ρ}}_{13}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_1\left(t\right)x_3\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_3}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_1}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

${\mathrm{\ρ}}_{23}\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}{x}_2\left(t\right)x_3\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{x_3}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{x_2}^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}}$

In three formulas: t is the time, integration from+∞～-∞; x ₁(t) be the 1st cover standard pressure measuring system pressure curve, x ₂(t) be the 2nd cover standard pressure measuring system pressure curve, x ₃(t) be the 3rd cover standard pressure measuring system pressure curve.

4. the method for metering sensitivity of electronic pressure detector according to claim 2 is characterised in that: arithmetic mean, residual error, residual sum of squares (RSS), standard deviation estimated value, the arithmetic mean standard deviation estimated value of metering three cover System Testing Pressure values

Choose As the error of modular system mean value, three cover modular systems agreements with $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}\≤0.66\%\mathrm{FS}$ As the error decision principle of modular system, if $2{\widehat{\mathrm{\σ}}}_{\stackrel{\‾}{x}}>0.66\%\mathrm{FS},$ Judge that then this calibration data does not meet as the requirement of calibration system and rejected.

5. the method for metering sensitivity of electronic pressure detector according to claim 1 is characterised in that: the electric voltage detector image data that is calibrated is handled, obtained test curve yy _i, modular system mean pressure curve y _iMotionless, translation electric voltage detector test curve yy _iEach data point of translation, related coefficient between measurement standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, a translation n data point, reach modular system mean pressure curve and electric voltage detector test curve rising edge degree of agreement is best, obtain related coefficient sequence ρ _j, obtain ρ again _jIn maximal value, as the related coefficient between standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, choose this related coefficient 〉=0.9997 with this maximal value, then this calibration effectively and adopt this calibration data.

6. the method for metering sensitivity of electronic pressure detector according to claim 5 is characterised in that: according to following formula:

${\mathrm{\ρ}}_j\left(\mathrm{\τ}\right)=\frac{{\∫}_{-\∞}^{\∞}\mathrm{yy}(t+j)\stackrel{\‾}{y}\left(t\right)\mathrm{dt}}{{\left[{\∫}_{-\∞}^{\∞}{\stackrel{\‾}{y}}^2\left(t\right)\mathrm{dt}{\∫}_{-\∞}^{\∞}{\mathrm{yy}}^2(t+j)\mathrm{dt}\right]}^{\frac{1}{2}}},$ In this formula: j=0～n, yy (t+j) the electric voltage detector test curve after for translation j point, y _i(t) be standard pressure measuring system mean pressure curve, measurement standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween related coefficient sequence ρ _j, get ρ _jIn maximal value as the related coefficient between standard pressure measuring system mean pressure curve and the electric voltage detector test curve that is calibrated, if electric voltage detector test curve yy _iTranslation j point back standard pressure measuring system mean pressure curve y _iWith the electric voltage detector test curve yy that is calibrated _iBetween the related coefficient maximum, then choose pressure curve y _iRising edge and test curve yy _I+jRising edge data metering sensitivity of electronic pressure detector.

7. according to the method for claim 2 or 5 described metering sensitivity of electronic pressure detector, be characterised in that:

A. the image data to three cover standard pressure measuring systems at first adopts the 30kHz cutoff frequency to carry out the digital filtering processing, and to filter the influence of random noise, the equation of linear regression by static calibration carries out data processing respectively more then;

B. at first adopt the 30kHz cutoff frequency to carry out digital filtering to the electric voltage detector image data that is calibrated and handle, and then continue calibration.

8. the method for metering sensitivity of electronic pressure detector according to claim 1 is characterised in that: calibrate under the effective prerequisite with the electric voltage detector that is calibrated at three cover standard pressure measuring systems, at normal pressure test macro mean pressure curve y _iRising edge get n data point by 15～100% scopes of surge pressure, composition data sequences y (i), i=1～n; Corresponding test curve yy at electric voltage detector _I+jRising edge get n data point, composition data sequence x (i), i=1～n; Two groups of data x (i), y (i) are carried out linear fit, draw work straight-line equation y _Ik=a _Ik+ b _IkX; In the formula: y _IkBe pressure, unit: MPa, a _IkBe intercept, unit: MPa, b _IkBe sensitivity, unit: MPa/LSB, x are the LSB value, and i is the base measuring temperature environment, and k is every kind of test number (TN) under the base measuring temperature environment.

9. the method for metering sensitivity of electronic pressure detector according to claim 1, be characterised in that: under normal, high and low three kinds of temperature environments, respectively electric voltage detector is calibrated three times, draw three groups of work straight-line equations under every kind of temperature environment respectively, to a of three set of equations under the same temperature environment _IkAnd b _IkBe averaged respectively and obtain a _iAnd a _i, just obtain being calibrated the work straight-line equation y under three kinds of temperature environments of manograph _i=a _i+ b _iX, a _iAnd b _iBe the sensitivity of the electric voltage detector that is calibrated under this temperature environment.

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