CN106610331A - Control method for pressure meter calibration for petroleum transmission pipelines in petroleum industry - Google Patents
Control method for pressure meter calibration for petroleum transmission pipelines in petroleum industry Download PDFInfo
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- CN106610331A CN106610331A CN201510712236.2A CN201510712236A CN106610331A CN 106610331 A CN106610331 A CN 106610331A CN 201510712236 A CN201510712236 A CN 201510712236A CN 106610331 A CN106610331 A CN 106610331A
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- 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
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Abstract
The invention relates to a control method for pressure meter calibration for petroleum transmission pipelines in the petroleum industry, which comprises the steps of sending a calibration mode entering command through a serial port after a pressure meter is initially powered or reset, enabling the pressure meter to stay at a calibration mode, generating different environmental temperature calibration values by using a high and low temperature chamber, and setting an acquisition time interval for a pressure sensor; performing acquisition on output of the pressure sensor automatically according to the set acquisition time interval, and obtaining a real-time digital value result of the acquisition; fitting a mapping relation between the real-time digital value of the output of the pressure sensor and the environmental temperature inside the temperature chamber according to the real-time digital value, and setting a fitting result corresponding table; and performing interpolation calculation again according to the mapping relation, and fitting a mapping relation between a full-range pressure value and the real-time digital value of the output of the pressure sensor. According to the control method, a precision requirement of pressure data of the output of the pressure meter can be achieved, the complexity of an algorithm and logic control is reduced, normal work tasks and resource overhead of the pressure meter are not increased, and no additional energy consumption is brought about.
Description
Technical field
The present invention relates to the pressure gauge digitized in oil field demarcates field, it is specifically defeated towards petroleum industry
The control method that the pressure gauge of oil-piping is demarcated.
Background technology
Pressure is Oil Field measured physical quantity with the most use, and pressure gauge is then widely used in petroleum industry
The occasion for surveying oil pipe internal pressure is needed, is broadly divided into oil pressure pressure gauge, casing pressure pressure gauge and back pressure table.
It is capable of the pressure data of automatic data collection petroleum industry pipeline inside oil body, and pressure data is remotely adopted by oil well
Collection terminal device RTU is uploaded to oil gateway device, shows in real time on Industry Control configuration interface and currently adopts
The pressure value of collection.The generation of pressure data then derives from collection and the calibration algorithm of pressure sensor signal.
The collection of pressure sensor signal is that the voltage signal that sensor is exported is entered by single-chip microcomputer inside ADC
Row collection.
Pressure calibration algorithm is broadly divided into two kinds, and one kind is to adopt theoretical calculation formula, according in different temperatures
Under the conditions of, the multistage equation between sensor output pressure value and sensor output voltage value is calculated, solve
Draw sensor output pressure value.For scm software calculating, logic calculates sufficiently complex, wave for this
Take processor resource, affect the real-time of pressure value output, but the pressure value for finally drawing is more accurate.Separately
A kind of is directly, by the preferable chemical conversion first-order equation formula of the output characteristic curve of pressure sensor, directly to calculate pressure
The magnitude of voltage of sensor output and the mapping relations of sensor output pressure value, the pressure that this method is calculated
Force value precision is low, there is larger error compared with real pressure value, and this method needs research staff to do
Substantial amounts of later stage evaluation work increased maintenance workload, oil supply making up the uncertain factor of error band
The application of field scene brings inconvenience.
At present pressure gauge is powered using battery mostly, and instrument once quits work, to going out petroleum pipeline pressure prison
Impact is shone in control, and changes manometric battery inconvenience, therefore has higher wanting to pressure gauge Overall Power Consumption
Ask.
The content of the invention
For the deficiencies in the prior art, the present invention provides a kind of pressure gauge mark towards petroleum industry oil pipeline
Fixed control method, can reach the required precision of pressure gauge output pressure data, reduce algorithm and logic control
Complexity.The method does not increase pressure gauge normal job tasks and resource overhead, will not bring extra energy
Amount is consumed.
The technical scheme that adopted for achieving the above object of the present invention is：
The control method that a kind of pressure gauge towards petroleum industry oil pipeline is demarcated, comprises the following steps：
Step 1：After pressure gauge is initially powered or resetted, calibration mode order is transmitted into by serial ports, makes pressure
Power table is in calibration mode, and using high-low temperature chamber different environment temperature calibration values are produced, and sets and pressure is passed
The acquisition time interval of sensor；
Step 2：Automatically pressure sensor output is acquired and is drawn according to set acquisition time interval and adopted
The real-time digital amount result of collection；
Step 3：The real-time digital amount and environment in incubator of pressure sensor output are fitted according to real-time digital amount
Mapping relations between temperature simultaneously arrange fitting result correspondence table；
Step 4：According to the interpolation calculation again of the mapping relations between environment temperature in real-time digital amount and incubator,
Fit the mapping relations of gamut pressure value and the real-time digital amount of pressure sensor output.
It is described to be acquired and draw collection to pressure sensor output automatically according to set acquisition time interval
Real-time digital amount result comprise the following steps：
Step 1：According to setting collection period and create timer, using single-chip microcomputer continuous several times to pressure pass
Sensor output voltage values are acquired, and with array form storage；
Step 2：Process is filtered to gathered data, the real-time digital amount result of collection is drawn.
The filter process is：The numerical value in array is arranged using bubbling method, filters maximum
After minimum of a value, the result remaining numerical value averaged as single-chip microcomputer conversion.
The real-time digital amount and environment temperature in incubator that pressure sensor output is fitted according to real-time digital amount
Mapping relations between degree simultaneously arrange fitting result correspondence table and comprise the following steps：
Step 1：Pressure gauge is positioned in incubator, adjustment incubator environment temperature reaches scale of thermometer definite value, and temperature
Angle value reaches stable state；
Step 2：The pressure value of adjustment pressure source output so as to reach pressure calibration value, and pressure value reaches surely
Determine state；
Step 3：By the digital quantity of the current collection pressure sensor output of serial ports inquiry, and record；
Step 4：After changing scale of thermometer definite value, circulation step 1～3 obtains the pressure under different temperatures calibration value
The real-time digital amount of sensor output, and arrange in fitting result correspondence table；
Step 5：According to the real-time digital amount of pressure sensor output, the real-time of pressure sensor output is fitted
Mapping relations in digital quantity and incubator between environment temperature, calculation pressure sensor is in a certain pressure calibration value
Under, the real-time digital amount produced under varying environment temperature conditionss.
The mapping relations according between environment temperature in real-time digital amount and incubator interpolation calculation again, intends
The mapping relations for closing out the real-time digital amount that gamut pressure value is exported with pressure sensor are comprised the following steps：
Step 1：Adjustment pressure source output pressure calibration value, pressure value reaches stable state；
Step 2：Fitting result correspondence table is inquired about by serial ports, single-chip microcomputer collection under current environmental temperature is drawn
The real-time digital amount of pressure sensor output, and record；
Step 3：After changing pressure calibration value, circulation step 1～2 obtains the pressure under different pressures calibration value
The real-time digital amount of sensor output；
Step 4：According to the real-time digital amount of pressure sensor output, pressure source under current environmental temperature is fitted
Mapping between the different pressure value of output and the real-time digital amount of single-chip microcomputer collection pressure sensor output is closed
System.
The acquisition time interval is identical with the collection period of single-chip microcomputer.
The invention has the advantages that and advantage：
1. the method that the present invention adopts fitting a straight line interpolation calculation twice, by pressure gauge initial power-on or reset
Pressure sensor output acquisition time interval and current incubator temperature after rebooting into calibration mode, according to setting
Angle value, is acquired to the output of current pressure sensor and show that sensor exports real-time digital amount automatically, according to
The real-time digital amount of collection is fitted in the real-time digital amount and incubator of pressure sensor output between environment temperature
Mapping relations and collection result is arranged in fitting result correspondence table, further according to this relation interpolation again
Calculate, the mapping relations of gamut pressure value and the real-time digital amount of pressure sensor output are fitted, from this
The pressure value of current sensor collection is derived from relation.
2. present invention decreases instrument ambient temperature change to gather output result according to into error.Software is calculated
The difficulty of method is appropriate, and the sensor output pressure value for obtaining can reach the required precision of 5 ‰ and the above, reduces
Plant capacity consumption.
Description of the drawings
Fig. 1 is the working stage transition diagram of the present invention.
Fig. 2 is the first stage interpolation algorithm curve fitting routine figure of the present invention.
Fig. 3 is the second stage interpolation algorithm curve fitting routine figure of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail.
It is an object of the invention to provide a kind of pressure gauge of petroleum industry oil pipeline is worked as by interpolation calculation
The mapping pass of the real-time digital amount of collection and the pressure value of gamut scope is exported at a temperature of front environment to sensor
The scaling method of system, without the need for system overhead.After pressure gauge initial power-on or reset, into calibration mold
Formula, the digital quantity by pressure gauge Chip Microcomputer A/D C pressure sensor exported under varying environment temperature conditionss
It is acquired, derives real-time digital amount.The real-time digital that different pressures calibration value draws is exported from pressure source
Amount releases the pressure value of current pressure sensor.This algorithm can reduce environment temperature to instrument to collect pressure value
Error, refined environment temperature linearly interval, reach raising pressure sensor acquisition precision, reduce instrument
The purpose of power consumption.
The invention mainly comprises：After pressure gauge system initial power-on or reset, mark is transmitted into by serial ports
Mould-fixed order, makes pressure gauge be under calibration mode.Setting incubator environment temperature calibration value simultaneously keeps stable,
Setting pressure source exports a certain pressure calibration value and keeps stable.Collection timer is created, Chip Microcomputer A/D C is pressed
The digital quantity of automatic pressure acquisition sensor output is spaced according to acquisition time, gathered data is analyzed, pressure is removed
Maximum, minimum of a value in sensor gathered data, tries to achieve the mean value of remaining data, reaches the mesh of filtering
, it follows that ADC gathers the real-time digital amount of sensor.Under different incubator environment temperature calibration values,
The different real-time digital amounts for collecting, through interpolation calculation, obtain the output of different temperatures lower pressure sensor
Real-time digital amount and environment temperature between mapping relations.By the pressure calibration value for changing pressure source output,
Calculate through quadratic interpolation, fit between the real-time digital amount and gamut pressure value of pressure sensor output
Mapping relations.Specifically include following steps：
Oil pipeline pressure gauge is transmitted into calibration mode order after initial power-on or reset by serial ports,
Pressure gauge is set to be under calibration mode；
Setting incubator environment temperature calibration value simultaneously keeps stable；
Setting pressure source exports a certain pressure calibration value and keeps stable；
Collection timer is created, Chip Microcomputer A/D C is according to the automatic pressure acquisition sensor output of acquisition time interval
Digital quantity；
According to analysis Chip Microcomputer A/D C gathered data, the maximum in gathered data is removed；
According to analysis Chip Microcomputer A/D C gathered data, the minimum of a value in gathered data is removed；
According to analysis Chip Microcomputer A/D C gathered data, the mean value that can be calculated in gathered data；
After changing incubator environment temperature calibration value, it is acquired again；
According to the pressure sensor collection digital quantity of the different incubator environment temperatures of analysis, Jing first time interpolation calculations
Fit both mapping relations；
Under current environmental temperature, the real-time digital amount that first time interpolation algorithm draws is recorded；
Change the pressure calibration value of pressure source output, record the real-time digital amount under different pressures calibration value；
Under the conditions of analysis current environmental temperature and pressure source output different pressures value, the real-time digital of collection
The pressure value of amount and gamut scope, second interpolation calculation of Jing fits both mapping relations.
The concept being related in the present invention is as follows：
1) pressure source：Pressure signal generator, unit is MPa, and precision is 0.001MPa.
2) incubator：The temperature controlling instruments of varying environment temperature can be produced, temperature controlling range is -50 DEG C～95 DEG C.
3) nominal pressure value：In calibration process, the pressure value of pressure source output.
4) environment temperature calibration value：In calibration process, the temperature value that incubator control is produced.
5) real-time digital amount：The digital numerical quantity of Chip Microcomputer A/D C Real-time Collection.
To achieve these goals, the present invention provides following technical scheme：
The pressure gauge of oil pipeline demarcates control method to be included：Incubator control, pressure source control and pressure sensing
Device acquisition system is operated；First time interpolation calculation curve matching；Second interpolation calculation curve matching.
As shown in figure 1, incubator control of the present invention, pressure source control and pressure sensor acquisition system
Operation, there is provided petroleum industry oil pipeline is real-time to sensor pressure values under varying environment temperature conditionss
Acquisition function.Pressure gauge software systems are transmitted into calibration mode after initial power-on or reset by serial ports
Order, into calibration mode.High-low temperature chamber is in different temperatures.System started a pressure every 1 second
Sensor exports digital data acquisition, and within remaining time, pressure gauge enters Low-power-consumptiodormancy dormancy state, under wait
Once collect and, so both ensure that the real-time of collection, again can be with reducing energy consumption.
As shown in Fig. 2 first time interpolation calculation of the present invention is that pressure gauge equipment is positioned over into high/low temperature
In case, according to temperature spot set environment scale of thermometer definite value T of design1For -40 DEG C, stably in order to temperature reaches
Thermostatic control 1～2 hour, it is ensured that pressure gauge equipment single-chip microcomputer internal temperature sensor collection temperature value and
The temperature of high-low temperature chamber is consistent.Pressure source output pressure calibration value is adjusted simultaneously, is set as 6.000MPa,
It is marked as P1.Start pressure source output switch, pressure source is exported to goal pressure calibration value P1, protect
Hold stable state 1～2 minute.Single-chip microcomputer is set to enter calibration mode, Chip Microcomputer A/D C is automatically according to during collection
Between be spaced digital quantity be acquired, each collection action is continuous sampling 32 times, will sampling 32 units
Element is stored in numerical filtering array, and array element is ranked up with Straight Insertion Sort method, removes element
Middle maximum and minimum of a value, to remaining 30 elements calculating of averaging is carried out, and draws real-time digital amount.
Inquiry real-time digital amount order is sent by serial ports, the real-time digital amount of the ADC collections of current monolithic machine is obtained,
It is marked as D11。
Adjustment high-low temperature chamber environment temperature calibration value T2, its temperature is set as into -10 DEG C.According to above-mentioned demarcation control
Method processed obtains temperature T2When real-time digital amount, be marked as D12。
By the D for obtaining11And D12Real-time digital numerical quantity, through first time interpolation algorithm, carries out curve fitting.
The environment temperature that the real-time digital amount that first stage interpolation calculation is obtained is produced with high-low temperature chamber sets up mapping
Relation.If the real-time digital amount under current environmental temperature is S1, the ring of current monolithic machine temperature sensor collection
Border temperature value is T, is set up shown in mapping relations equation below：
Further derive real-time digital amount S under current environmental temperature1For：
Again adjust high-low temperature chamber environment temperature calibration value, make temperature be respectively set to 0 DEG C, 20 DEG C, 40 DEG C,
60 DEG C, 85 DEG C, according to above-mentioned demarcation rate-determining steps, obtain corresponding real-time digital amount D at a temperature of these1n。
Then the general formula of the calculating real-time digital amount in whole simulated environment temperature sections is：
First time Curve fitting of the present invention is calculated, by under varying environment scale of thermometer definite value,
Real-time Collection is carried out to the digital quantity of pressure sensor output, through interpolation calculation and curve matching, is obtained
Mapping relations in the real-time digital amount and incubator of the output of different temperatures lower pressure sensor between environment temperature.
The error that environment temperature is brought to the collection of real-time digital amount can be reduced by this algorithm, environment temperature has been refined
Linearly interval, improves pressure gauge acquisition precision, reduces pressure gauge operating power consumption.
As shown in figure 3, second interpolation calculation of the present invention is obtained using first stage interpolation algorithm
Real-time digital amount S1, the pressure calibration value of pressure source output is adjusted again, 4.500MPa is set it to,
It is labeled as P2.Start pressure source output switch, pressure source is exported to goal pressure calibration value P2, keep steady
Determine state 1～2 minute.According to first stage method of operating, calculating to the real-time number under current environmental temperature
Word amount, is S by its result queue2。
By the S for obtaining1And S2Real-time digital numerical quantity, using interpolation algorithm, carries out curve fitting.By first
The real-time digital amount that stage interpolation calculation is obtained sets up mapping relations with cell pressure numerical value.If working as front ring
At a temperature of border pressure source output pressure value be P, the current environmental temperature lower first stage collection real-time digital
Measure as S, set up shown in mapping relations equation below：
And then derive that the pressure value P that current pressure sensor is gathered is：
Again adjust pressure source output pressure calibration value so as to be adjusted to respectively 3.000MPa, 1.500MPa,
0.000MPa, according to above-mentioned second stage pressure calibration control method, obtains other pressure marks under Current Temperatures
The real-time digital amount of fixed point.Under being located at Current Temperatures, certain corresponding real-time digital amount of two pressure calibration points is
SiAnd Si+1, corresponding pressure calibration value is PiAnd Pi+1, the real-time number collected under current environmental temperature
Word amount is S, and the real-time pressure numerical value of the required pressure sensor for obtaining is P.Then in gamut pressure limit
Pressure value computing formula be：
After second interpolation calculation curve matching, pressure calibration pattern is exited.In the normal mode, according to
Pressure sensor calibrating control algolithm is planted like this, is spaced according to set acquisition time, to pressure sensor
Pressure value is acquired.
The advantage of this calibration algorithm is significantly to reduce what environment temperature was gathered to pressure sensor
The error that numerical tape comes, has refined environment temperature linearly interval.The complexity of Software for Design is reduced simultaneously,
The electric energy that every time collection to pressure sensor is consumed is lower than what complicated algorithm was consumed, passes so as to reach pressure
Sensor improves acquisition precision, reduces the purpose of power consumption.
Claims (6)
1. the control method that a kind of pressure gauge towards petroleum industry oil pipeline is demarcated, it is characterised in that：Including with
Lower step：
Step 1：After pressure gauge is initially powered or resetted, calibration mode order is transmitted into by serial ports, makes pressure
Power table is in calibration mode, and using high-low temperature chamber different environment temperature calibration values are produced, and sets and pressure is passed
The acquisition time interval of sensor；
Step 2：Automatically pressure sensor output is acquired and is drawn according to set acquisition time interval and adopted
The real-time digital amount result of collection；
Step 3：The real-time digital amount and environment in incubator of pressure sensor output are fitted according to real-time digital amount
Mapping relations between temperature simultaneously arrange fitting result correspondence table；
Step 4：According to the interpolation calculation again of the mapping relations between environment temperature in real-time digital amount and incubator,
Fit the mapping relations of gamut pressure value and the real-time digital amount of pressure sensor output.
2. the control method that the pressure gauge towards petroleum industry oil pipeline according to claim 1 is demarcated, its
It is characterised by：It is described automatically pressure sensor output to be acquired and obtained according to set acquisition time interval
The real-time digital amount result for going out collection is comprised the following steps：
Step 1：According to setting collection period and create timer, using single-chip microcomputer continuous several times to pressure pass
Sensor output voltage values are acquired, and with array form storage；
Step 2：Process is filtered to gathered data, the real-time digital amount result of collection is drawn.
3. the control method that the pressure gauge towards petroleum industry oil pipeline according to claim 2 is demarcated, its
It is characterised by：The filter process is：The numerical value in array is arranged using bubbling method, is filtered
After maximum and minimum of a value, the result remaining numerical value averaged as single-chip microcomputer conversion.
4. the control method that the pressure gauge towards petroleum industry oil pipeline according to claim 1 is demarcated, its
It is characterised by：It is described to be fitted in the real-time digital amount and incubator of pressure sensor output according to real-time digital amount
Mapping relations between environment temperature simultaneously arrange fitting result correspondence table and comprise the following steps：
Step 1：Pressure gauge is positioned in incubator, adjustment incubator environment temperature reaches scale of thermometer definite value, and temperature
Angle value reaches stable state；
Step 2：The pressure value of adjustment pressure source output so as to reach pressure calibration value, and pressure value reaches surely
Determine state；
Step 3：By the digital quantity of the current collection pressure sensor output of serial ports inquiry, and record；
Step 4：After changing scale of thermometer definite value, circulation step 1～3 obtains the pressure under different temperatures calibration value
The real-time digital amount of sensor output, and arrange in fitting result correspondence table；
Step 5：According to the real-time digital amount of pressure sensor output, the real-time of pressure sensor output is fitted
Mapping relations in digital quantity and incubator between environment temperature, calculation pressure sensor is in a certain pressure calibration value
Under, the real-time digital amount produced under varying environment temperature conditionss.
5. the control method that the pressure gauge towards petroleum industry oil pipeline according to claim 1 is demarcated, its
It is characterised by：The mapping relations according between environment temperature in real-time digital amount and incubator interpolation meter again
Calculate, fit gamut pressure value with the mapping relations of the real-time digital amount that pressure sensor is exported including following
Step：
Step 1：Adjustment pressure source output pressure calibration value, pressure value reaches stable state；
Step 2：Fitting result correspondence table is inquired about by serial ports, single-chip microcomputer collection under current environmental temperature is drawn
The real-time digital amount of pressure sensor output, and record；
Step 3：After changing pressure calibration value, circulation step 1～2 obtains the pressure under different pressures calibration value
The real-time digital amount of sensor output；
Step 4：According to the real-time digital amount of pressure sensor output, pressure source under current environmental temperature is fitted
Mapping between the different pressure value of output and the real-time digital amount of single-chip microcomputer collection pressure sensor output is closed
System.
6. the control method that the pressure gauge towards petroleum industry oil pipeline according to claim 1 and 2 is demarcated,
It is characterized in that：The acquisition time interval is identical with the collection period of single-chip microcomputer.
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