CN106248297A - Error correcting method for pressure sensor and the calorimeter with the method pressure measurement - Google Patents
Error correcting method for pressure sensor and the calorimeter with the method pressure measurement Download PDFInfo
- Publication number
- CN106248297A CN106248297A CN201610603767.2A CN201610603767A CN106248297A CN 106248297 A CN106248297 A CN 106248297A CN 201610603767 A CN201610603767 A CN 201610603767A CN 106248297 A CN106248297 A CN 106248297A
- Authority
- CN
- China
- Prior art keywords
- pressure
- value
- adc
- calorimeter
- point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
- G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of error correcting method for pressure sensor, including obtaining basic data；Set basic pressure point；Obtain the pressure measxurement fair curve under M degree water temperature；Obtain the pressure measxurement fair curve on basic pressure point；Obtain the pressure measxurement fair curve of M degree water temperature basic pressure point；The pressure measuring value of calorimeter is modified；The present invention is directed to each pressure transducer, selected basic pressure point is the most once revised the error correction work that can complete pressure transducer, therefore the inventive method not only increases the pressure measurement accuracy of pressure transducer, drastically increases production efficiency and demarcation, the correction efficiency of calorimeter especially.The described error correcting method for pressure sensor of application that the inventive method provides carries out pressure measxurement, measures accurately, and application is reliable, and method is simple, ultrahigh in efficiency；And apply the error correcting method of the present invention to carry out tonometric calorimeter, there is certainty of measurement advantage high, reliable equally.
Description
Technical field
Present invention relates particularly to a kind of error correcting method for pressure sensor and the calorimeter with the method pressure measurement.
Background technology
Along with the development of national economy technology, heating system has stepped into huge numbers of families, to broad masses of the people
That brings comfortable lives easily.Calorimeter be in heating system for measure and show water flow through heat-exchange system discharged or
Absorb the instrument of caloric value, be a crucial instrument in the system charged by heat metering.Its measurement data is heat supply
Pressing the important evidence of heat metering charge, therefore its certainty of measurement in system, the technical specification such as job stability is the most right
Heating enterprise the most for a user, is all very important.Heating enterprise needs the service condition to calorimeter and confession simultaneously
The thermal drying of hot pipe network is understood in real time, in order to improve efficiency, is necessary for understanding the flow of heating network, entering return pipe
Temperature and pressure situation.
Calorimeter is mainly made up of flow transducer, pairing temperature sensor and computer, and with entering, the pressure of return pipe
Power measures function.Pressure measuring module is integrated in inside calorimeter.The pressure measuring function of calorimeter, is by using micro-process
The high-precision adc ADC that device carries obtains into magnitude of voltage corresponding to, return pipe force value, by voltage and pressure
Relativity, thus obtain what this mode of force value realized.But, the result measured due to reality is raw voltage values,
Being converted into pressure by raw voltage values again, there is error with the conversion of force value itself, adds the former of this measurement in voltage
Beginning magnitude of voltage changes such as the change of temperature, and this change is nonlinear, and high-precision adc is surveyed simultaneously
Amount also brings along some constant errors, all these it is difficult to ensure that in the pressure limit of gamut and in gamut water temperature range
The accuracy of pressure measurement errors.
In order to solve this problem, existing most method is introduced into correction-compensation coefficient, by this correction-compensation system
Several pressure is carried out calibration correction compensation, thus reduce error in dipping.The pressure of the fixing model of the most fixing manufacturer production passes
The concordance of sensor is preferable: when measuring pressure, although the correction factor of each pressure transducer is different, but fixing producer is raw
Produce fixing model pressure transducer measure pressure-correction-compensation coefficient curve linear basically identical.
But owing to, in gamut pressure limit, pressure correction penalty coefficient is nonlinear Distribution, if to ensure complete
The accuracy of the pressure error in range pressure limit, each pressure transducer is required to the pressure spot in the range of gamut
Calibrate, obtain an accurate correction-compensation curve.But this method is when producing, owing to wanting the pressure of calibration correction
Force is more, and production efficiency can be caused the lowest.The most most producer is in order to provide production efficiency, in actual production process
In decrease the calibration of pressure spot, cause pressure-correction-compensation coefficient curve the biggest with actual difference, it is impossible to well to ensure
Pressure measurement error accuracy in the pressure limit of gamut；Simultaneously because the water temperature range width that calorimeter requires, identical
Pressure spot error under different water temperatures the most different, the correction-compensation curve of wall scroll cannot ensure at gamut water temperature model
In enclosing, the error of each pressure spot, causes pressure spot inaccurate at different water temperature downforce error in dippings.
Summary of the invention
An object of the present invention be to provide a kind of makeover process simply, reliably, accurately pressure transducer errors repair
Correction method.
The two of the purpose of the present invention are that providing a kind of utilizes described error correcting method for pressure sensor to carry out pressure measurement
Calorimeter.
This error correcting method for pressure sensor that the present invention provides, comprises the steps:
S1. pressure measxurement range and pressure measurement accuracy requirement, the pressure transducer of the pressure transducer of positive model to be repaired are obtained
In the temperature survey range of calorimeter, temperature measurement accuracy requirement and the calorimeter electric-control system installed, ADC modular converter is defeated
Enter the relation between magnitude of voltage and output voltage values；
S2. choosing N number of basic pressure point in pressure measxurement range, pressure measxurement range is divided by described N number of basic pressure point
Interval for N+1；N value is natural number, and N value is the biggest, then the error correction degree of sensor is the highest；
S3. the required precision that obtains according to step S1, pass between the input voltage value of ADC modular converter and output voltage values
N+1 the interval that system and step S2 obtain, uses following formula under M degree water temperature, obtains several pressure in each interval
Error correction point:
PPa_1=Pmin, PPa_2=Pmin+Pu, PPa_3= Pmin+2*Pu..., PPa_n-1= Pmin+ (n-1) * Pu,
PPa_n= Pmax, and Pmin=PPa_1＜ PPa_2＜ ... ＜ PPa_n=Pmax；
P in formulapa_1、Ppa_2、……、Ppa_nFor error correction pressure spot, PminFor the minimal pressure force value of the pressure limit in interval,
PmaxFor the maximal pressure force value of the pressure limit in interval, PuFor pressure measurement accuracy requirement；
On the pressure error adjusting point in each interval S4. obtained in step S3, under M degree water temperature, obtain reset pressure value and
The pressure measuring value of the pressure transducer place calorimeter of I positive model to be repaired；According to the reset pressure value obtained and calorimeter
Pressure measuring value, the pressure measuring value error of calorimeter is modified and curve matching, obtains pressure under M degree water temperature and survey
Amount fair curve；
S5., in the temperature survey range of calorimeter, following formula is used to obtain N number of basic pressure point under different water temperatures
Temperature error adjusting point:
TPb_1=Tmin, TPb_2=Tmin+Tu, TPb_3= Tmin+2*Tu..., TPb_n-1= Tmin+ (n-1) * Tu,
TPb_n= Tmax, and Tmin=TPb_1＜ TPb_2＜ ... ＜ TPb_n=Tmax；
T in formulapb_1、Tpb_2、……、Tpb_nFor temperature error adjusting point, TminMinimum water temperature in the range of measuring for calorimeter,
TmaxFor the highest water temperature in the range of measuring, TuFor water temperature required precision, n=1,2,3 ...；
On the temperature error adjusting point in each interval S6. obtained in step S5, under the pressure that N number of basic pressure point is corresponding,
Obtain the pressure measuring value of the pressure transducer place calorimeter of reset pressure value and J positive model to be repaired；Former according to obtain
Beginning force value and pressure measuring value, carry out error correction and curve matching to the pressure measuring value of calorimeter, obtain basic pressure
Pressure measxurement fair curve on point；
S7., under M degree water temperature, under the pressure that N number of basic pressure point is corresponding, reset pressure value, K positive model to be repaired are obtained
The pressure measxurement meansigma methods of pressure transducer place calorimeter and temperature survey meansigma methods；According to obtain reset pressure value and
Pressure measxurement meansigma methods, carries out error correction to the pressure measuring value of calorimeter, obtains the pressure of M degree water temperature-basic pressure point
Measure fair curve；
When S8. obtaining calorimeter actual measurement, measurement obtains pressure measured value PMeasured value, according to following Rule correction-compensation system
Numerical value KBaseWith water temperature value TBase:
1) the basic pressure point that step S2 is selected is the most N number of, respectively P1、P2、……PN, then pressure measxurement range is divided into N+1
Individual interval, the respectively first interval [Pmin,P1], the second interval [P1,P2] ..., the interval [P of NN-1,PN], N+1 interval
[PN,Pmax], wherein PminFor pressure measxurement range minima, PmaxFor pressure measxurement range maximum;
2) according to pressure measured value PMeasured valueMagnitude relationship with each pressure range, it is determined that measured value falls into concrete pressure range
In；
3) if pressure measured value PMeasured valueFall into X interval, then take interval higher limit P of XXAs the basic pressure point chosen,
Take interval higher limit P of X simultaneouslyXCorresponding temperature survey meansigma methods is as water temperature value TBase；If X is N or N+1, then take
PNFor the basic pressure point chosen, water temperature value TBaseAll values are PNCorresponding temperature survey meansigma methods；
S9. according to the pressure measxurement fair curve under the M degree water temperature obtained, pressure measxurement fair curve on basic pressure point
With the pressure measxurement fair curve of M degree water temperature-basic pressure point, use following formula that the pressure measuring value of calorimeter is repaiied
Just:
PCorrection value=PMeasured value×( KPa_i ×KPb_j ×KBase) / ( KPa_ii×KPb_jj )
In formula, PCorrection valueFor revised measured value, PMeasured valueFor the pressure measured value of calorimeter, KPa_iFor pressure measured value at M degree
Correction-compensation coefficient corresponding on pressure measxurement fair curve under water temperature, KBaseFor the pressure transducer of calorimeter in step S8
The correction-compensation coefficient value on basic pressure point chosen, KPa_iiThe basic pressure point chosen for step S8 is in M degree water temperature-basic
Correction-compensation coefficient corresponding on the pressure measxurement fair curve of pressure spot；KPb_jWater temperature during for measuring is on basic pressure point
Pressure measxurement fair curve on corresponding correction-compensation coefficient, KPb_jjWater temperature value T obtained for step S8BaseAt basic pressure
Correction-compensation coefficient corresponding on pressure measxurement fair curve on point.
ADC modular converter described in step S1 is the ADC modular converter that calorimeter controller carries.
The model of described calorimeter controller is MSP430F4793.
Relation between input voltage value and the output voltage values of described acquisition ADC modular converter, specifically includes as follows
Step:
. definition VinFor the analog input voltage by ADC modular converter；Definition DadcNumeral output for ADC modular converter
ADC voltage sample value；Definition Vr+Maximum reference voltage level for ADC modular converter；Definition Vr-Minimum for ADC modular converter
Reference voltage level；
. for each pressure measurement point, utilize pressure transducer, external voltage reference voltage chips and ADC modular converter
Quickly carry out ADC analog digital conversion；
. use equation below to calculate numeral output ADC voltage sample value Dadc:
Dadc =4095 × (Vin - Vr-)/(Vr+ - Vr-),
. to same pressure measurement point, measure B time continuously within the A second, obtain B analog input voltage through analog digital conversion
Numeral output ADC voltage sample value Dadc1~ DadcB；
. numeral output ADC voltage sample value step 4 obtained screens out maximum and minima, by remaining B-2 number
Word output ADC voltage sample value averaged DAdc_ puts down, as final ADC output voltage values.
The described Relation acquisition pressure measxurement between the input voltage value according to ADC modular converter and output voltage values
Value, specifically includes following steps:
1. definition high pressure points PhighCorresponding numeral output ADC voltage sample value is Dadc_high；Definition low pressure point PlowRight
The numeral output ADC voltage sample value answered is Dadc_low；Definition Pdiff = Phigh-Plow；Definition Ddiff = Dadc_high-
Dadc_low；Definition Bias is that the force value that pressure transducer is measured exports ADC electricity with the numeral through micro-process ADC analog digital conversion
Press the slope that the conversion oblique line of sampled value is corresponding, then
Bias= Pdiff /Ddiff；
2. Bias, P that calorimeter is built-in is readhighAnd Dadc_highValue；
3. numeral output ADC voltage sample value D is asked forAdc_ puts downCorresponding reset pressure measured value PMeasured value:
PMeasured value=Phigh-(Dadc_high-DAdc_ puts down) * Bias
N number of basic pressure point described in step S2 is 3 basic pressure points.
M degree water temperature described in step S3 is 50 DEG C.
The pressure of the I described in step S4 the J described in the pressure transducer of positive model to be repaired, step S6 positive model to be repaired
The pressure transducer of the K described in sensor and step S7 positive model to be repaired is 10.
Present invention also offers a kind of calorimeter utilizing described error correcting method for pressure sensor to carry out pressure measurement.
This error correcting method for pressure sensor that the present invention provides, according to the characteristic of calorimeter pressure transducer to pressure
Power measurement procedure carries out subregion, and is modified respectively for each district, it is only necessary to carry out standard M for pressure transducer
The correction of basic pressure point in pressure spot correction in the range of gamut under water temperature and once full water temperature range, then for each
Individual pressure transducer, the most once revises on selected basic pressure point and can complete the error of pressure transducer and repair
Just working, therefore the inventive method not only increases the pressure measurement accuracy of pressure transducer, drastically increases heat especially
The production efficiency of table and demarcation, correction efficiency.The described error correcting method for pressure sensor of application that the inventive method provides enters
Row pressure measxurement, measures accurately, and application is reliable, and method is simple, ultrahigh in efficiency；And apply the error correcting method of the present invention to carry out
Tonometric calorimeter, has certainty of measurement advantage high, reliable equally.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the present invention.
Detailed description of the invention
It is illustrated in figure 1 the method flow diagram of the present invention: this error correcting method for pressure sensor that the present invention provides,
Comprise the steps:
S1. pressure measxurement range and pressure measurement accuracy requirement, the pressure transducer of the pressure transducer of positive model to be repaired are obtained
In the temperature survey range of calorimeter, temperature measurement accuracy requirement and the calorimeter electric-control system installed, ADC modular converter is defeated
Enter the relation between magnitude of voltage and output voltage values；
ADC modular converter is the ADC modular converter that calorimeter controller carries；The model of calorimeter controller is
MSP430F4793。
Relation between input voltage value and the output voltage values of described acquisition ADC modular converter, specifically includes as follows
Step:
. definition VinFor the analog input voltage by ADC modular converter；Definition DadcNumeral output for ADC modular converter
ADC voltage sample value；Definition Vr+Maximum reference voltage level for ADC modular converter；Definition Vr-Minimum for ADC modular converter
Reference voltage level；
. for each pressure measurement point, utilize pressure transducer, external voltage reference voltage chips and ADC modular converter
Quickly carry out ADC analog digital conversion；
. use equation below to calculate numeral output ADC voltage sample value Dadc:
Dadc =4095 × (Vin - Vr-)/(Vr+ - Vr-),
. to same pressure measurement point, measure B time continuously within the A second, obtain B analog input voltage through analog digital conversion
Numeral output ADC voltage sample value Dadc1~ DadcB；
. numeral output ADC voltage sample value step 4 obtained screens out maximum and minima, by remaining B-2 number
Word output ADC voltage sample value averaged DAdc_ puts down, as final ADC output voltage values.
So, according to the Relation acquisition pressure measuring value between input voltage value and the output voltage values of ADC modular converter,
Then specifically include following steps:
1. definition high pressure points PhighCorresponding numeral output ADC voltage sample value is Dadc_high；Definition low pressure point PlowRight
The numeral output ADC voltage sample value answered is Dadc_low；Definition Pdiff = Phigh-Plow；Definition Ddiff = Dadc_high-
Dadc_low；Definition Bias is that the force value that pressure transducer is measured exports ADC electricity with the numeral through micro-process ADC analog digital conversion
Press the slope that the conversion oblique line of sampled value is corresponding, then
Bias= Pdiff /Ddiff；
2. Bias, P that calorimeter is built-in is readhighAnd Dadc_highValue；
3. numeral output ADC voltage sample value D is asked forAdc_ puts downCorresponding reset pressure measured value PMeasured value:
PMeasured value=Phigh-(Dadc_high-DAdc_ puts down) * Bias
S2. choosing N number of basic pressure point in pressure measxurement range, pressure measxurement range is divided by described N number of basic pressure point
Interval for N+1；N value is natural number, and N value is the biggest, then the error correction degree of sensor is the highest；Preferably, base
This pressure spot can elect 4 as；
S3. the required precision that obtains according to step S1, pass between the input voltage value of ADC modular converter and output voltage values
N+1 the interval that system and step S2 obtain, uses following formula under M degree water temperature, obtains several pressure in each interval
Error correction point:
PPa_1=Pmin, PPa_2=Pmin+Pu, PPa_3= Pmin+2*Pu..., PPa_n-1= Pmin+ (n-1) * Pu,
PPa_n= Pmax, and Pmin=PPa_1＜ PPa_2＜ ... ＜ PPa_n=Pmax；
P in formulapa_1、Ppa_2、……、Ppa_nFor error correction pressure spot, PminFor the minimal pressure force value of the pressure limit in interval,
PmaxFor the maximal pressure force value of the pressure limit in interval, PuFor pressure measurement accuracy requirement；
On the pressure error adjusting point in each interval S4. obtained in step S3, under M degree water temperature, obtain reset pressure value and
The pressure measuring value of the pressure transducer place calorimeter of 10 positive models to be repaired；According to the reset pressure value obtained and calorimeter
Pressure measuring value, the pressure measuring value error of calorimeter is modified and curve matching, obtains pressure under M degree water temperature and survey
Amount fair curve；Preferably, can choose M degree water temperature is 50 DEG C；
S5., in the temperature survey range of calorimeter, following formula is used to obtain N number of basic pressure point under different water temperatures
Temperature error adjusting point:
TPb_1=Tmin, TPb_2=Tmin+Tu, TPb_3= Tmin+2*Tu..., TPb_n-1= Tmin+ (n-1) * Tu,
TPb_n= Tmax, and Tmin=TPb_1＜ TPb_2＜ ... ＜ TPb_n=Tmax；
T in formulapb_1、Tpb_2、……、Tpb_nFor temperature error adjusting point, TminMinimum water temperature in the range of measuring for calorimeter,
TmaxFor the highest water temperature in the range of measuring, TuFor water temperature required precision, n=1,2,3 ...；
On the temperature error adjusting point in each interval S6. obtained in step S5, under the pressure that N number of basic pressure point is corresponding,
Obtain the pressure measuring value of the pressure transducer place calorimeter of reset pressure value and 10 positive models to be repaired；Former according to obtain
Beginning force value and pressure measuring value, carry out error correction and curve matching to the pressure measuring value of calorimeter, obtain basic pressure
Pressure measxurement fair curve on point；
S7., under M degree water temperature, under the pressure that N number of basic pressure point is corresponding, reset pressure value, 10 positive models to be repaired are obtained
The pressure measxurement meansigma methods of pressure transducer place calorimeter and temperature survey meansigma methods；According to obtain reset pressure value and
Pressure measxurement meansigma methods, carries out error correction to the pressure measuring value of calorimeter, obtains the pressure of M degree water temperature-basic pressure point
Measure fair curve；
When S8. obtaining calorimeter actual measurement, measurement obtains pressure measured value PMeasured value, according to following Rule correction-compensation system
Numerical value KBaseWith water temperature value TBase:
1) the basic pressure point that step S2 is selected is the most N number of, respectively P1、P2、……PN, then pressure measxurement range is divided into N+1
Individual interval, the respectively first interval [Pmin,P1], the second interval [P1,P2] ..., the interval [P of NN-1,PN], N+1 interval
[PN,Pmax], wherein PminFor pressure measxurement range minima, PmaxFor pressure measxurement range maximum;
2) according to pressure measured value PMeasured valueMagnitude relationship with each pressure range, it is determined that measured value falls into concrete pressure range
In；
3) if pressure measured value PMeasured valueFall into X interval, then take interval higher limit P of XXAs the basic pressure point chosen,
Take interval higher limit P of X simultaneouslyXCorresponding temperature survey meansigma methods is as water temperature value TBase；If X is N or N+1, then take
PNFor the basic pressure point chosen, water temperature value TBaseAll values are PNCorresponding temperature survey meansigma methods；
S9. according to the pressure measxurement fair curve under the M degree water temperature obtained, pressure measxurement fair curve on basic pressure point
With the pressure measxurement fair curve of M degree water temperature-basic pressure point, use following formula that the pressure measuring value of calorimeter is repaiied
Just:
PCorrection value=PMeasured value×( KPa_i ×KPb_j ×KBase) / ( KPa_ii×KPb_jj )
In formula, PCorrection valueFor revised measured value, PMeasured valueFor the pressure measured value of calorimeter, KPa_iFor pressure measured value at M degree
Correction-compensation coefficient corresponding on pressure measxurement fair curve under water temperature, KBaseFor the pressure transducer of calorimeter in step S8
The correction-compensation coefficient value on basic pressure point chosen, its value be the pressure transducer of calorimeter on basic pressure point, will
The force value detected is modified to the correction-compensation coefficient of theoretical pressure value, KPa_iiThe basic pressure point chosen for step S8 is at M
Correction-compensation coefficient corresponding on the pressure measxurement fair curve of degree water temperature-basic pressure point；KPb_jWater temperature during for measuring exists
Correction-compensation coefficient corresponding on pressure measxurement fair curve on basic pressure point, KPb_jjThe water temperature value obtained for step S8
TBaseCorrection-compensation coefficient corresponding on pressure measxurement fair curve on basic pressure point.
Below in conjunction with a specific embodiment, the method for the present invention is further described:
As a example by ultrasonic calorimeter carries out pressure measxurement and error correction under the water temperature of 10.0 degree and 1.0Mpa pressure spot,
That is: TSurvey=10 degree, PStandard=1.0Mpa.First have to be defined below and set.
The definition of gamut pressure limit and setting:
Definition gamut temperature range is [Pmin, Pmax], PminFor minimum pressure, PmaxFor maximum pressure, set Pmin=
0.2Mpa, Pmax=2.5Mpa。
The definition of gamut water temperature range and setting:
Definition gamut water temperature range is [Tmin, Tmax], TminFor minimum temperature, TmaxFor maximum temperature, set Tmin=5 degree,
Tmax=95 degree.
The definition of basic pressure point and setting:
The definition of basic pressure point is: low pressure point Plow, intermediate pressure point Pmid, high pressure points Phigh.Meet Pmin＜ Plow＜
Pmid＜ Phigh＜ Pmax 。
Set Plow=0.6 Mpa, Pmid=1.2 Mpa, Phigh=2.0 Mpa。
The definition of original data set M [N] and setting:
Definition original data set M [N] be the analog input voltage of each second pressure transducer input after analog digital conversion by micro-
Process N number of ADC voltage sample value of numeral output.
M[N]={ Dadc_N_1, Dadc_ N_2..., Dadc_N_N }。
Set N=12, then original data set is M [12], sets M [12] as follows:
M [12]=1988,1970,1980,1900,
1975 , 1982, 1978, 1975,
1981, 1979, 1998, 1974
}；
The analog input voltage inputted wait the pressure transducer that the pressure spot revised is corresponding is processed numeral by micro-after analog digital conversion
ADC voltage sample value D of outputAdc_ puts downDefinition:
Define wait the pressure spot revised corresponding pressure transducer input analog input voltage after analog digital conversion by micro-process
ADC voltage sample value D of numeral outputAdc_ puts downFor by the N number of continuous print ADC voltage sample data in original data set M [N], throw
After falling maximum and minima, it is calculated the meansigma methods of remaining data, it is assumed that Dadc_N_1For minima, Dadc_N_NFor maximum,
Then DAdc_ puts downCan be expressed as follows:
DAdc_ puts down=(Dadc_N_2+ Dadc_N_3 +……+ Dadc_N_N-1)/N-2；
Dadc_high、Dadc_lowDefinition:
Definition Dadc_highFor high pressure points P in basic pressure pointhighCorresponding ADC voltage sample value.Definition Dadc_lowFor base
Low pressure point P in this pressure spotlowCorresponding ADC voltage sample value.
The definition of Bias:
Definition Bias is that the conversion of the voltage-mode number conversion ADC value that the force value that pressure transducer is measured exports with microprocessor is oblique
The slope that line is corresponding.
Pdiff = Phigh -Plow
Ddiff = Dadc_high -Dadc_low
Then: Bias=Pdiff / Ddiff
Pressure measxurement fair curve definition under M degree water temperature and setting:
Pressure measxurement fair curve under definition M degree water temperature is that two-dimensional array represents: PA [m] [2]={ { PPa_1, KPa_1},
{PPa_2, KPa_2},……{PPa_m, KPa_m, wherein m is the pressure of distribution in this average measurement pressure-correction-compensation coefficient curve
The quantity of point, PPa_mFor certain pressure spot without the reset pressure value revised, and 0 ＜ Pmin≤PPa_1＜ PPa_2＜ ... ＜ PPa_m
≤Pmax；KPa_ mFor the correction-compensation coefficient that certain pressure spot is corresponding.
M degree water temperature herein is set as 50 degree.
Because gamut pressure limit is 0Mpa ~ 2.5 Mpa, in order to ensure the accuracy of error, this average measurement pressure-
The minimum pressure spacing value of the pressure spot in correction-compensation coefficient curve is 0.1 Mpa, and pressure spot is from the beginning of 0Mpa degree, until reaching
To 2.5 Mpa, so quantity m=26 of the pressure spot of distribution on the pressure measxurement fair curve under bar M degree water temperature.
Pressure measxurement fair curve two-dimensional array under setting M degree water temperature:
PA [26][2] = {
{ 0.0,1.000 }, { 0.116,1.0121 },
{ 0.221,1.0105 }, 0.306,1.0100},
{ 0.424,1.0084 }, { 0.515,1.0126 },
{ 0.608,1.0114 }, { 0.705,1.0106 },
{ 0.812,1.0093 }, { 0.908,1.0099 },
{ 1.070,0.9877 }, { 1.128,0.9896 },
{ 1.203,1.0288 }, { 1.315,1.0294 },
{ 1.403,1.0388 }, { 1.512,1.0486 },
{ 1.613,1.0486 }, { 1.705,1.0494 },
{ 1.806,1.0092 }, { 1.905,1.0097 },
{ 2.014,1.0075 }, { 2.125,1.0121 },
{ 2.319,1.0091 }, { 2.402,1.0089 },
{ 2.505,1.0089 }
};
Pressure measxurement fair curve definition on basic pressure point and setting:
Pressure measxurement fair curve on definition basic pressure point is that two-dimensional array represents: PB [n] [4]={ { TPb_1, KPb_low_1
, KPb_mid_1, KPb_high_1},{TPb_2, KPb_low_2, KPb_mid_2, KPb_high_2... { TPb_n, KPb_low_n, KPb_mid_n,
KPb_high_n, wherein n is the quantity of the water temperature point of distribution on the pressure measxurement fair curve on this basic pressure point,
TPb_nFor water temperature value, and 0 ＜ Tmin≤TPb_1＜ TPb_2＜ ... ＜ TPb_n≤Tmax；KPb_low_nFor TPb_nBasic pressure under water temperature
Point low pressure point PlowCorresponding correction-compensation coefficient；KPb_mid _nFor TPb_nBasic pressure point intermediate pressure point P under water temperature midRight
The correction-compensation coefficient answered；KPb_ high _nFor TPb_nBasic pressure point high pressure points P under water temperature highCorresponding correction-compensation system
Number.
Because gamut water temperature range is 5 degree ~ 95 degree, in order to ensure the accuracy of error, the pressure on basic pressure point is surveyed
The minimum temperature spacing value of the temperature spot on amount fair curve is 5 degree, and temperature is from the beginning of 5 degree, until reaching 95 degree, so bar base
Quantity n=18 of the water temperature point of distribution on pressure measxurement fair curve on this pressure spot
Set the two-dimensional array of pressure measxurement fair curve on this basic pressure point:
PB [18][4] = {
{ 5,1.0159,0.9968,1.009 },
{ 10,1.0209,0.9979,1.029 },
{ 15,1.0049,1.0021,1.109 },
{ 20,1.0142,1.0050,1.029 },
{ 25,1.0029,1.0132,1.019 },
{ 30,1.0089,1.0044,0.989 },
{ 35,1.0056,1.0026,1.049 },
{ 40,1.0146,1.0048,1.036 },
{ 45,1.0683,1.0153,1.057 },
{ 50,1.0209,1.0261,1.028 },
{ 55,1.0843,1.0415,1.062 },
{ 60,1.0698,1.0326,1.089 },
{ 65,1.0099,1.0202,1.056 },
{ 70,1.0182,1.0425,1.067 },
{ 75,1.0149,1.0326,1.082 },
{ 80,1.0179,1.0521,1.045 },
{ 85,1.0129,1.0723,1.103 },
{ 90,1.0089,1.0228,1.107 },
{ 95,1.0172,1.0422,1. 089 }
}
The pressure measxurement fair curve definition of M degree water temperature-basic pressure point and setting:
Pressure measxurement fair curve two-dimensional array PC [3] [3] of definition ultrasonic calorimeter M degree water temperature-basic pressure point=
{{Pc_low, Kc_ low, Tc_ low },{Qc_ mid, Kc_ mid, Tc_ mid },{Qc_ high, Kc_ high, Tc_ high, wherein:
Pc_low, Kc_ low, Tc_ lowIt is respectively basic pressure point low pressure point PlowWithout the reset pressure value revised, needs during calibration
The correction-compensation coefficient being modified and water temperature, Pc_ mid, Kc_ mid, Tc_ l midIt is respectively basic pressure point intermediate pressure point Pmid
The correction-compensation coefficient being modified without the reset pressure value revised, needs during calibration and water temperature, Pc_ high, Kc_ high,
Tc_ highIt is respectively basic pressure point high pressure points P highIt is modified without the reset pressure value revised, needs during calibration
Correction-compensation coefficient and water temperature.
Set
Pc_low=0.638, Kc_ low=1.0036, Tc_ low= 49.942；
Pc_mid=1.216, Kc_ mid=1.0068, Tc_ lmid= 49.956；
Pc_low=2.053, Kc_ low=1.0057, Tc_ low= 49.973；
Therefore PC [3] [3]=
{ 0.638,1.0036,49.942 },
{ 1.216,1.0068,49.956 },
{ 2.053,1.0057,49.973 },
}
Calculate wait the pressure spot revised corresponding pressure transducer input analog input voltage after analog digital conversion by micro-process
ADC voltage sample value D of numeral outputAdc_ puts down:
According to the data of original data set M [12], after removing maximum 1998 and minima 1900, the meansigma methods of remaining data
DAdc_ puts downFor:
DAdc_ puts down=(1988+1970+ 1980+1975+1982+1978+1975+1981+1979+1974
) / 10；
After calculating: ADC voltage sample value DAdc_ puts down =1978 。
Calculate ADC voltage sample value DAdc_ puts downCorresponding reset pressure measured value PMeasured valueFor:
Wherein: DAdc_ puts down =1978
Plow=0.6 Mpa, Dadc_low=356
Phigh=2.0 Mpa, Dadc_high =3674
Cause: Bias=(Phigh -Plow)/(Dadc_high -Dadc_low)
Calculate: Bias=0.0005425
Cause: PMeasured value= Phigh -Bias*(Dadc_high-DAdc_ puts down)
Calculate: PMeasured value=1.08 Mpa
The definition of Bias and setting:
Definition Bias is that the conversion of the voltage-mode number conversion ADC value that the force value that pressure transducer is measured exports with microprocessor is oblique
The slope that line is corresponding.
The P of reset pressure measured valueMeasured valueCalculating:
PMeasured value= Phigh -Bias*(Dadc_high-DAdc_ puts down)
Read calibration parameter two-dimensional array PC [3] [3] during the calibration of basic pressure point, obtain interval interior basic pressure belonging to it
The correction-compensation coefficient value K that point is correspondingBaseWith water temperature value TBase。
PC [3][3]= {
{ 0.638,1.0036,49.942 },
{ 1.216,1.0068,49.956 },
{ 2.053,1.0057,49.973 },
}
Because: PMeasured value=1.08 Mpa, Plow=0.6 Mpa, Pmid=1.2 Mpa
Therefore: Plow≤PMeasured value＜ Pmid , then PMeasured valueBelong to the 2nd interval.
PBase= P mid =1.2 Mpa
KBase= KBase _ mid=1.0068
TBase= TBase _ mid=49.973
P is obtained according to pressure measxurement fair curve two-dimensional array PA [26] [2] under M degree water temperatureMeasured valueCorresponding array numbering i,
Correction-compensation COEFFICIENT K corresponding on its pressure measxurement fair curve under this M degree water temperature is obtained according to this numbering ipa_i, PMeasured value
=1.08 Mpa, according to data in PA [26] [2], work as Ppa_i =1.128 Mpa, Ppa_i_1=1.07 Mpa, meet: Ppa_i_1＜
PMeasured value≤Ppa_i, then: PMeasured valueCorrection-compensation COEFFICIENT K in this average measurement pressure-correction-compensation coefficient curvepa_i=
0.9896。
P is obtained according to pressure measxurement fair curve two-dimensional array PA [26] [2] under M degree water temperatureBaseCorresponding array is compiled
Number ii, obtains correction-compensation coefficient corresponding on its pressure measxurement fair curve under this M degree water temperature according to this numbering ii
Kpa_ii, PBase=1.2 Mpa, according to data in PA [26] [2], work as Ppa_ii =1.203 Mpa, Ppa_ ii _1=1.128 Mpa are full
Foot: Ppa_i_1＜ PMeasured value≤Ppa_i, then: PBaseThe correction-compensation coefficient in pressure measxurement fair curve under this M degree water temperature
Kpa_ii= 1.0288。
T is obtained according to pressure measxurement fair curve two-dimensional array PB [18] [4] on basic pressure pointSurveyCorresponding number
Group # j, obtains correction-compensation system corresponding on its pressure measxurement fair curve on this basic pressure point according to this numbering j
Number Kpb_j, TSurvey=10 degree, basic pressure point is intermediate pressure point P mid, according to data in PB [18] [4], work as Tpb_ j =10 degree,
Tpb_ j _1=5 degree, meet: Tpb_ j _1＜ TSurvey≤Tpb_ j, then: TSurveyPressure measxurement fair curve on this basic pressure point
In correction-compensation COEFFICIENT Kpb_ j = 0.9979。
T is obtained according to pressure measxurement fair curve two-dimensional array PB [18] [4] on basic pressure pointBaseCorresponding
Array numbering jj, obtains correction corresponding on its pressure measxurement fair curve on this basic pressure point according to this numbering jj and mends
Repay COEFFICIENT Kpb_jj, TBase=49.973, basic pressure point is intermediate pressure point P mid, according to data in PB [18] [4], when
Tpb_ jj =50 degree, Tpb_ jj _1=45 degree, meet: Tpb_ jj _1＜ TSurvey≤Tpb_ jj, then: TBaseOn this basic pressure point
Correction-compensation COEFFICIENT K in pressure measxurement fair curvepb_ jj = 1.0261。
Final pressure measured value P through correction-compensationCorrection valueFor:
PCorrection value=PMeasured value×( KPa_i ×KPb_j ×KBase) / ( KPa_ii×KPb_jj )；
= 1.08×( 0.9896×0.9979×1.0068) / ( 1.0288×1.0261)；
=1.0172Mpa
Because normal pressure PStandard value=1.0Mpa, does not revises pre-test value PMeasured valueWith normal pressure PStandard valueError amount be
0.08Mpa, is unsatisfactory for the limits of error (0.025 Mpa) that pressure class of accuracy is 1.0 grades, by the reality of the present invention
Execute, final pressure correction value PCorrection valueWith normal pressure PStandard valueError amount be 0.0172 Mpa, meet the pressure of ultrasonic calorimeter
The limits of error requirement of power.
Claims (9)
1. an error correcting method for pressure sensor, comprises the steps:
S1. pressure measxurement range and pressure measurement accuracy requirement, the pressure transducer of the pressure transducer of positive model to be repaired are obtained
In the temperature survey range of calorimeter, temperature measurement accuracy requirement and the calorimeter electric-control system installed, ADC modular converter is defeated
Enter the relation between magnitude of voltage and output voltage values；
S2. choosing N number of basic pressure point in pressure measxurement range, pressure measxurement range is divided by described N number of basic pressure point
Interval for N+1；N value is natural number, and N value is the biggest, then the error correction degree of sensor is the highest；
S3. the required precision that obtains according to step S1, pass between the input voltage value of ADC modular converter and output voltage values
N+1 the interval that system and step S2 obtain, uses following formula under M degree water temperature, obtains several pressure in each interval
Error correction point:
PPa_1=Pmin, PPa_2=Pmin+Pu, PPa_3= Pmin+2*Pu..., PPa_n-1= Pmin+ (n-1) * Pu,
PPa_n= Pmax, and Pmin=PPa_1＜ PPa_2＜ ... ＜ PPa_n=Pmax；
P in formulapa_1、Ppa_2、……、Ppa_nFor error correction pressure spot, PminFor the minimal pressure force value of the pressure limit in interval,
PmaxFor the maximal pressure force value of the pressure limit in interval, PuFor pressure measurement accuracy requirement；
On the pressure error adjusting point in each interval S4. obtained in step S3, under M degree water temperature, obtain reset pressure value and
The pressure measuring value of the pressure transducer place calorimeter of I positive model to be repaired；According to the reset pressure value obtained and calorimeter
Pressure measuring value, the pressure measuring value error of calorimeter is modified and curve matching, obtains pressure under M degree water temperature and survey
Amount fair curve；
S5., in the temperature survey range of calorimeter, following formula is used to obtain N number of basic pressure point under different water temperatures
Temperature error adjusting point:
TPb_1=Tmin, TPb_2=Tmin+Tu, TPb_3= Tmin+2*Tu..., TPb_n-1= Tmin+ (n-1) * Tu,
TPb_n= Tmax, and Tmin=TPb_1＜ TPb_2＜ ... ＜ TPb_n=Tmax；
T in formulapb_1、Tpb_2、……、Tpb_nFor temperature error adjusting point, TminMinimum water temperature in the range of measuring for calorimeter,
TmaxFor the highest water temperature in the range of measuring, TuFor water temperature required precision, n=1,2,3 ...；
On the temperature error adjusting point in each interval S6. obtained in step S5, under the pressure that N number of basic pressure point is corresponding,
Obtain the pressure measuring value of the pressure transducer place calorimeter of reset pressure value and J positive model to be repaired；Former according to obtain
Beginning force value and pressure measuring value, carry out error correction and curve matching to the pressure measuring value of calorimeter, obtain basic pressure
Pressure measxurement fair curve on point；
S7., under M degree water temperature, under the pressure that N number of basic pressure point is corresponding, reset pressure value, K positive model to be repaired are obtained
The pressure measxurement meansigma methods of pressure transducer place calorimeter and temperature survey meansigma methods；According to obtain reset pressure value and
Pressure measxurement meansigma methods, carries out error correction to the pressure measuring value of calorimeter, obtains the pressure of M degree water temperature-basic pressure point
Measure fair curve；
When S8. obtaining calorimeter actual measurement, measurement obtains pressure measured value PMeasured value, according to following Rule correction-compensation system
Numerical value KBaseWith water temperature value TBase:
1) the basic pressure point that step S2 is selected is the most N number of, respectively P1、P2、……PN, then pressure measxurement range is divided into N+1
Individual interval, the respectively first interval [Pmin,P1], the second interval [P1,P2] ..., the interval [P of NN-1,PN], N+1 interval
[PN,Pmax], wherein PminFor pressure measxurement range minima, PmaxFor pressure measxurement range maximum;
2) according to pressure measured value PMeasured valueMagnitude relationship with each pressure range, it is determined that measured value falls into concrete pressure range
In；
3) if pressure measured value PMeasured valueFall into X interval, then take interval higher limit P of XXAs the basic pressure point chosen, with
Time take interval higher limit P of XXCorresponding temperature survey meansigma methods is as water temperature value TBase；If X is N or N+1, then take PN
For the basic pressure point chosen, water temperature value TBaseAll values are PNCorresponding temperature survey meansigma methods；
S9. according to the pressure measxurement fair curve under the M degree water temperature obtained, pressure measxurement fair curve on basic pressure point
With the pressure measxurement fair curve of M degree water temperature-basic pressure point, use following formula that the pressure measuring value of calorimeter is repaiied
Just:
PCorrection value=PMeasured value×( KPa_i×KPb_j×KBase) / ( KPa_ii×KPb_jj)
In formula, PCorrection valueFor revised measured value, PMeasured valueFor the pressure measured value of calorimeter, KPa_iFor pressure measured value at M degree water
Correction-compensation coefficient corresponding on pressure measxurement fair curve under Wen, KBasePressure transducer for calorimeter selects in step S8
The correction-compensation coefficient value on basic pressure point taken, KPa_iiThe basic pressure point chosen for step S8 is in M degree water temperature-substantially press
Correction-compensation coefficient corresponding on the pressure measxurement fair curve in force；KPb_jWater temperature during for measuring is on basic pressure point
Correction-compensation coefficient corresponding on pressure measxurement fair curve, KPb_jjWater temperature value T obtained for step S8BaseAt basic pressure point
On pressure measxurement fair curve on corresponding correction-compensation coefficient.
Error correcting method for pressure sensor the most according to claim 1, it is characterised in that the ADC conversion described in step S1
Module is the ADC modular converter that calorimeter controller carries.
Error correcting method for pressure sensor the most according to claim 2, it is characterised in that described calorimeter controller
Model be MSP430F4793.
Error correcting method for pressure sensor the most according to claim 3, it is characterised in that described acquisition ADC modulus of conversion
Relation between input voltage value and the output voltage values of block, specifically includes following steps:
. definition VinFor the analog input voltage by ADC modular converter；Definition DadcNumeral output for ADC modular converter
ADC voltage sample value；Definition Vr+Maximum reference voltage level for ADC modular converter；Definition Vr-Minimum for ADC modular converter
Reference voltage level；
. for each pressure measurement point, utilize pressure transducer, external voltage reference voltage chips and ADC modular converter
Quickly carry out ADC analog digital conversion；
. use equation below to calculate numeral output ADC voltage sample value Dadc:
Dadc=4095 × (Vin - Vr-)/(Vr+ - Vr-),
. to same pressure measurement point, measure B time continuously within the A second, obtain B analog input voltage through analog digital conversion
Numeral output ADC voltage sample value Dadc1~ DadcB；
. numeral output ADC voltage sample value step 4 obtained screens out maximum and minima, by remaining B-2 number
Word output ADC voltage sample value averaged DAdc_ puts down, as final ADC output voltage values.
Error correcting method for pressure sensor the most according to claim 4, it is characterised in that described changes according to ADC
Relation acquisition pressure measuring value between input voltage value and the output voltage values of module, specifically includes following steps:
1. definition high pressure points PhighCorresponding numeral output ADC voltage sample value is Dadc_high；Definition low pressure point PlowRight
The numeral output ADC voltage sample value answered is Dadc_low；Definition Pdiff = Phigh-Plow；Definition Ddiff= Dadc_high-
Dadc_low；Definition Bias is that the force value that pressure transducer is measured exports ADC electricity with the numeral through micro-process ADC analog digital conversion
Press the slope that the conversion oblique line of sampled value is corresponding, then
Bias= Pdiff /Ddiff；
2. Bias, P that calorimeter is built-in is readhighAnd Dadc_highValue；
3. numeral output ADC voltage sample value D is asked forAdc_ puts downCorresponding reset pressure measured value PMeasured value:
PMeasured value=Phigh-(Dadc_high-DAdc_ puts down) * Bias.
6. according to the error correcting method for pressure sensor one of claim 1 ~ 5 Suo Shu, it is characterised in that the N described in step S2
Individual basic pressure point is 3 basic pressure points.
7. according to the error correcting method for pressure sensor one of claim 1 ~ 5 Suo Shu, it is characterised in that the M described in step S3
Degree water temperature is 50 DEG C.
8. according to the error correcting method for pressure sensor one of claim 1 ~ 5 Suo Shu, it is characterised in that the I described in step S4
K described in the pressure transducer of the J described in the pressure transducer of individual positive model to be repaired, step S6 positive model to be repaired and step S7
The pressure transducer of individual positive model to be repaired is 10.
9. a calorimeter, it is characterised in that apply the error correcting method for pressure sensor described in described claim 1 ~ 8 to enter
Row pressure measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610603767.2A CN106248297B (en) | 2016-07-28 | 2016-07-28 | Error correcting method for pressure sensor and calorimeter with this method pressure measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610603767.2A CN106248297B (en) | 2016-07-28 | 2016-07-28 | Error correcting method for pressure sensor and calorimeter with this method pressure measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106248297A true CN106248297A (en) | 2016-12-21 |
| CN106248297B CN106248297B (en) | 2018-10-12 |
Family
ID=57603413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610603767.2A Active CN106248297B (en) | 2016-07-28 | 2016-07-28 | Error correcting method for pressure sensor and calorimeter with this method pressure measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106248297B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084818A (en) * | 2017-03-22 | 2017-08-22 | 深圳市博巨兴实业发展有限公司 | A kind of calibration method of high-precision pressure sensor chip |
| CN108931336A (en) * | 2017-05-23 | 2018-12-04 | 北京航天计量测试技术研究所 | A kind of high stability pressure control algorithm |
| CN112985688A (en) * | 2021-02-20 | 2021-06-18 | 武汉飞恩微电子有限公司 | Output calibration method and device of pressure sensor and readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2615532B2 (en) * | 1991-09-04 | 1997-05-28 | 動力炉・核燃料開発事業団 | Zero compensation method for high-precision differential pressure measuring device |
| CN101750185A (en) * | 2010-01-21 | 2010-06-23 | 西北工业大学 | Method for measuring accuracy of small pressure |
| CN104390680A (en) * | 2014-12-22 | 2015-03-04 | 湖南威铭能源科技有限公司 | Flow error correction method for time difference type ultrasonic heat meter |
| CN105527056A (en) * | 2014-09-28 | 2016-04-27 | 沈阳中科奥维科技股份有限公司 | Temperature reference-based pressure compensation calibration method |
| CN105628266A (en) * | 2015-12-25 | 2016-06-01 | 武汉中航传感技术有限责任公司 | Temperature compensation system and method of pressure sensor |
-
2016
- 2016-07-28 CN CN201610603767.2A patent/CN106248297B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2615532B2 (en) * | 1991-09-04 | 1997-05-28 | 動力炉・核燃料開発事業団 | Zero compensation method for high-precision differential pressure measuring device |
| CN101750185A (en) * | 2010-01-21 | 2010-06-23 | 西北工业大学 | Method for measuring accuracy of small pressure |
| CN105527056A (en) * | 2014-09-28 | 2016-04-27 | 沈阳中科奥维科技股份有限公司 | Temperature reference-based pressure compensation calibration method |
| CN104390680A (en) * | 2014-12-22 | 2015-03-04 | 湖南威铭能源科技有限公司 | Flow error correction method for time difference type ultrasonic heat meter |
| CN105628266A (en) * | 2015-12-25 | 2016-06-01 | 武汉中航传感技术有限责任公司 | Temperature compensation system and method of pressure sensor |
Non-Patent Citations (2)
| Title |
|---|
| 刘志辉等: "活塞式热量表检定系统研究", 《中国计量学院学报》 * |
| 王丽红: "标准表法热能表检定装置测量结果的不确定度评定", 《工业计量》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084818A (en) * | 2017-03-22 | 2017-08-22 | 深圳市博巨兴实业发展有限公司 | A kind of calibration method of high-precision pressure sensor chip |
| CN108931336A (en) * | 2017-05-23 | 2018-12-04 | 北京航天计量测试技术研究所 | A kind of high stability pressure control algorithm |
| CN112985688A (en) * | 2021-02-20 | 2021-06-18 | 武汉飞恩微电子有限公司 | Output calibration method and device of pressure sensor and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106248297B (en) | 2018-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101718849B (en) | Automatic calibration system of charge/discharge detection instrument of storage battery | |
| CN104236652B (en) | Method for determining at least one gas parameter of a flowing gas | |
| CN103557991B (en) | A kind of for tonometric vacuum gauge calibration method and device thereof | |
| CN101858811A (en) | Method for compensating signal of high-precision pressure sensor | |
| CN107478382B (en) | Automatic detection device and detection method for pressure instrument | |
| CN103162901A (en) | Nonlinear calibrating method for multiple temperature points of pressure sensor | |
| CN203084175U (en) | Constant current electronic load tester | |
| CN103575414A (en) | Method for compensating temperature measuring error of thermocouple | |
| CN106248297A (en) | Error correcting method for pressure sensor and the calorimeter with the method pressure measurement | |
| CN105527038B (en) | Platinum thermal resistance sensor error correcting method and the calorimeter with this method thermometric | |
| CN101706294A (en) | Method for automatically judging calibration time of sensor | |
| CN101846572A (en) | Method for decreasing basic error of pressure sensor | |
| CN105352632A (en) | Digital pressure sensor and method for obtaining digital pressure signal | |
| CN208635964U (en) | Pressure sensor calibrating equipment | |
| CN103063321B (en) | Platinum resistance temperature measuring equipment and temperature measuring method thereof | |
| CN109323796A (en) | A kind of full warm area range pressure sensor scaling method | |
| CN103604525A (en) | Thermal resistor temperature measuring instrument based on verification data | |
| CN102768049A (en) | Intelligent differential pressure type flow rate sensing device and design method of intelligent differential pressure type flow rate sensing device | |
| CN105527056A (en) | Temperature reference-based pressure compensation calibration method | |
| CN104034378A (en) | Constant-current thermal gas mass flow meter and measuring method implemented by same | |
| CN102818623B (en) | Method and system for calibrating brightness and chrominance meter | |
| CN210051915U (en) | Rapid calibration device of tipping bucket type rain gauge | |
| CN113932889B (en) | Intelligent fuel metering correction device based on turbine flowmeter | |
| CN105471454A (en) | Self-correcting device for radio frequency signal source and correction system for radio-frequency signal | |
| CN111693083B (en) | Online temperature and humidity instrument in-situ calibration method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |