CN108709686A - The calibration facility and scaling method of pressure sensor - Google Patents
The calibration facility and scaling method of pressure sensor Download PDFInfo
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- CN108709686A CN108709686A CN201810799487.2A CN201810799487A CN108709686A CN 108709686 A CN108709686 A CN 108709686A CN 201810799487 A CN201810799487 A CN 201810799487A CN 108709686 A CN108709686 A CN 108709686A
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- pressure
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- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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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
Abstract
The present invention provides a kind of calibration facility of pressure sensor and scaling methods.Calibration facility includes：Temperature setting unit, the temperature for setting sensor to be calibrated；Pressure setup unit, the pressure for setting sensor to be calibrated；Control module；Context detection module, wherein, context detection module and temperature setting unit are connect with control module to detect and reflect in real time that the temperature parameter of temperature setting unit, context detection module and pressure setup unit are connect with control module to detect and reflect in real time the pressure parameter of pressure setup unit.It applies the technical scheme of the present invention, simplifies calibration process, improve calibration efficiency.
Description
Technical field
The present invention relates to transducer calibration technical fields, a kind of calibration facility in particular to pressure sensor and
Scaling method.
Background technology
The calibration system of Universal pressure sensor is to provide series of standards pressure by dynamometer.Such as piston gage
Standard test weight series pressure is added into sensor, according to the output type of sensors A D circuits, read by standard metering instrument
Corresponding numerical value, it is established that input-output function relationship of the pressure sensor under corresponding use environment.
The calibration system of Universal pressure sensor has the following problems：
1. data acquisition is difficult.It needs to rely on artificial observation and manual record, the consistency for reading data is poor；
2. it is complicated to resolve calibrating parameters process.It needs mass data manual entry computer first, the typing of data and multiple
Core heavy workload and take.
Accordingly, it is desirable to provide a kind of new calibration facility, can simplify calibration process, calibration efficiency is improved.
Invention content
The main purpose of the present invention is to provide a kind of calibration facility of pressure sensor and scaling methods, existing to solve
Transducer calibration process is complicated in technology, demarcates inefficient problem.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of calibration facility of pressure sensor,
Calibration facility includes：Temperature setting unit, the temperature for setting sensor to be calibrated；Pressure setup unit is waited for for setting
The pressure of calibration sensor；Control module；Context detection module, wherein context detection module and temperature setting unit with control
For the connection of molding block to detect and reflect in real time the temperature parameter of temperature setting unit, context detection module and pressure setup unit are equal
It is connect with control module to detect and reflect in real time the pressure parameter of pressure setup unit.
Further, context detection module includes：Temperature detecting module connects with control module and temperature setting unit respectively
It connects, with detection and real-time reflection temperature parameter；Pressure detecting module is connect with control module and pressure setup unit respectively, with
Detection and in real time reflection pressure parameter.
Further, temperature parameter includes the model and Current Temperatures of temperature setting unit；Pressure parameter includes that pressure is set
Pressure source model, pressure unit and the environmental pressure of order member.
According to another aspect of the present invention, a kind of scaling method of pressure sensor is provided, scaling method is using above-mentioned
Calibration facility demarcated, scaling method includes：Step S01：Reflect by context detection module detection and that in real time temperature is set
The pressure parameter of the temperature parameter and pressure setup unit of order member.
Further, context detection module includes pressure detecting module, and pressure setup unit includes automatic weight load system
System, in step S01, scaling method further includes the pressure parameter that automatic weight loading system is detected by pressure detecting module.
Further, after step S01, scaling method further includes：Detect and reflect the sensor of sensor to be calibrated
The step of parameter.
Further, after the step of detecting and reflecting the sensor parameters of sensor to be calibrated, scaling method also wraps
Automatic Calibration step is included, automatic Calibration step includes：Step S10：By temperature setting unit, preset temperature value T is set, wherein
T=T1 ... ..., Ti, i=1,2 ... ..., m；Step S20：Preset pressure value P is set by pressure setup unit, wherein P=
P1 ... ..., Pj, j=1,2 ... ..., n；Step S30：Work as T=Ti, when P={ P1 ... ..., Pj }, detects sensor to be calibrated
Sensor parameters；Work as T=Ti+1, when P={ P1 ... ..., Pj }, detects the sensor parameters of sensor to be calibrated, wherein m and n
It is positive integer.
Further, control module includes data processing unit, and sensor to be calibrated has specified calibration coefficient, at data
It includes processor to manage unit, and after step S30, automatic Calibration step further includes：Step S40：Sensor parameters are through processor
Practical calibration coefficient is obtained after processing, and practical calibration coefficient is compared with specified calibration coefficient.
Further, before step S20, after step slo, automatic Calibration step further includes：Step S11：Pass through
Temperature detecting module detects the actual temperature value that temperature presets unit；Step S12：Judge the actual temperature value that detects whether etc.
In preset temperature value T, if so, S20 is thened follow the steps, if it is not, then executing makes actual temperature value equal to preset temperature value T's
Step.
Further, context detection module includes pressure detecting module；Before step S30, after step S20, automatically
Demarcating steps further include：Step S21：The actual pressure value that pressure presets unit is detected by pressure detecting module；Step S22：
Judge whether the actual pressure value detected is equal to preset pressure value P, if so, S30 is thened follow the steps, if it is not, then executing
The step of making actual pressure value be equal to preset pressure value P.
Further, sensor to be calibrated has calibrated error, and after the step s 40, automatic Calibration step further includes sentencing
Disconnected step, judgment step include：Step S41：Judge whether the difference between practical calibration coefficient and specified calibration coefficient is more than
Equal to calibrated error, if it is, the calibration coefficient of sensor to be calibrated is practical calibration coefficient, if it is not, then biography to be calibrated
The calibration coefficient of sensor is specified calibration coefficient.
Further, data processing unit further includes memory, after automatic Calibration step, scaling method further include by
Practical calibration coefficient and sensor parameters are stored in the storing step in memory.
Further, after storing step, scaling method further includes report generation step.
It applies the technical scheme of the present invention, calibration facility has temperature setting unit, thus can be according to the needs of user
For sensor settings environment temperature to be calibrated；Pressure setup unit can be that pressure is arranged in sensor to be calibrated, particularly with well
For the pressure sensor of lower operation, downhole temperature environment can be simulated by temperature setting unit, pass through pressure setup unit
Setting underground pressure force value provides temperature identical with working environment at coal mines to simulate down-hole pressure environment for sensor to be calibrated
Degree and pressure environment, the temperature and pressure realized in the calibration environment for treating calibration sensor are arranged, enormously simplify automatically
Calibration process improves calibration efficiency, ensure that calibration result is accurate.Further, environment monitoring module, pressure setup unit
It is connect with controller with temperature setting unit, the temperature and pressure in detection and in real time reflection calibration process, with to demarcating ring
Border adjusts in time, keeps the environment of calibration process consistent with the working environment of sensor to be calibrated, and then reaches raising calibration
The effect of quality.Therefore, it by above-mentioned setting, realizes and calibration process is automatically controlled, simple to operate, calibration result
Accurately, calibration mass is improved.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the embodiment of the calibration facility of pressure sensor according to the present invention；And
Fig. 2 shows the scaling method flow diagrams that pressure sensor calibrating is carried out using the calibration facility of Fig. 1.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, pedestal；20, temperature setting unit；30, pressure setup unit；31, hydraulic system；32, baric systerm；33, certainly
Dynamic counterweight loading system；34, barometer；40, data acquisition box；50, hub is measured；60, data processing unit；70, it waits marking
Determine sensor.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of calibration facilities of pressure sensor.The calibration facility of the embodiment includes
Temperature setting unit 20, pressure setup unit 30, control module and environment module.Temperature setting unit 20 is to be calibrated for setting
The temperature of sensor 70；Pressure setup unit 30 is used to set the pressure of sensor 70 to be calibrated；Context detection module, wherein
Context detection module and temperature setting unit 20 are connect with control module to detect and reflect in real time temperature setting unit 20
Temperature parameter, context detection module and pressure setup unit 30 are connect with control module to detect and reflect in real time pressure setting
The pressure parameter of unit 30.
Calibration facility in the application has temperature setting unit 20, thus can be needed for biography to be calibrated according to user
70 set environment temperature of sensor；Pressure setup unit 30 can be that pressure is arranged in sensor 70 to be calibrated, make particularly with underground
For the pressure sensor of industry, downhole temperature environment can be simulated by temperature setting unit 20, pass through pressure setup unit 30
Underground pressure force value is set, to simulate down-hole pressure environment, is provided for sensor 70 to be calibrated identical with working environment at coal mines
Temperature and pressure, the temperature and pressure realized in the calibration environment for treating calibration sensor 70 are arranged, enormously simplify automatically
Calibration process improves calibration efficiency, ensure that calibration result is accurate.
Further, environment monitoring module, pressure setup unit 30 and temperature setting unit 20 are connect with controller, inspection
It surveys and the temperature and pressure in reflection calibration process makes the environment of calibration process to be adjusted in time to calibration environment in real time
It is consistent with the working environment of sensor to be calibrated, and then achieve the effect that improve calibration mass.Therefore, real by above-mentioned setting
Show and calibration process has been automatically controlled, simple to operate, calibration result is accurate, improves calibration mass.
That is, using the technical solution of the application, the tool for simulating sensor 70 to be calibrated can be needed according to user
The temperature and pressure of body use environment, to improve the accuracy of subsequent calibration result.
Specifically, the context detection module in the application includes temperature detecting module and pressure detecting module.Temperature detection
Module is connect with control module and temperature setting unit 20 respectively, with detection and real-time reflection temperature parameter；Pressure detecting module
It is connect respectively with control module and pressure setup unit 30, with detection and real-time reflection pressure parameter.
The environment temperature that calibration sensor 70 can be treated by the way that temperature detecting module is arranged is detected, and is pressed by being arranged
Power detection module, the environmental pressure that can treat calibration sensor 70 are detected, to ensure that sensor 70 to be calibrated is closing
It is calibrated in suitable temperature environment and pressure environment.For example, the sensor to be calibrated 70 in the application is primarily referred to as being used for underground
The pressure sensor of operation needs the environment in face of high temperature in the pressure sensor of underground work, also higher to required precision.This
By the way that temperature detecting module is arranged in application, whether the calibration environment that can detect sensor 70 to be calibrated reaches underground work
It is required that the hot environment for simulating underground work carries out calibration process, make calibrated pressure sensor in high-temperature operation environment
Precision higher, meet the requirement of production test.
In this application, temperature parameter includes model, Current Temperatures, temperature regulating range of temperature setting unit 20 etc.；
Pressure parameter includes pressure source model, pressure unit and the environmental pressure of pressure setup unit 30.
Whether the model that temperature setting unit 20 is detected using temperature detecting module meets calibration request, detects biography to be calibrated
Environment temperature residing for sensor 70；Utilize the pressure source model of pressure detecting module detection pressure setup unit 30, the list of pressure
The environmental pressure of position and barricade.By the detection of above-mentioned parameter, user can accurately hold residing for sensor 70 to be calibrated
Environment, the setting to demarcate environment provide reference.
Preferably, the temperature setting unit 20 in the application is incubator.
Sensor 70 to be calibrated is placed in incubator, incubator is that sensor 70 to be calibrated provides suitable temperature environment, is made
The temperature environment of calibration process is identical as the working environment of sensor 70 to be calibrated, also can be according to the work of sensor 70 to be calibrated
Temperature range sets calibration temperature step by step, to meet the temperature condition in different operating environment.
Certainly, in the unshowned alternate embodiment of the application, temperature setting unit 20 can also be the control of other temperature
Equipment.As long as disclosure satisfy that the adjustment for the environment temperature for treating calibration sensor 70.
As shown in Figure 1, in the embodiment of the present invention, calibration facility further includes the pedestal being connect with sensor 70 to be calibrated
10, pressure setup unit 30 includes hydraulic system 31, baric systerm 32, automatic weight loading system 33 and barometer 34.Hydraulic pressure
System 31 is used for 10 transmission standard pressure of pedestal；Baric systerm 32 is connect with hydraulic system 31, for adding for hydraulic system 31
Pressure；Automatic weight loading system 33 is connect with hydraulic system 31, for being the load of sensor 70 pressure to be calibrated in calibration process
Power；Barometer 34 is used to detect the atmospheric pressure in environment.
In calibration process, sensor 70 to be calibrated is arranged on pedestal 10, and pedestal 10 is together with sensor 70 1 to be calibrated
It rises and is arranged in incubator.Hydraulic system 31 is used to provide support force for pedestal 10, and specifically, pedestal 10, which has, accommodates hydraulic oil
Normal pressure is supplied to pedestal 10 by accommodating chamber by hydraulic oil.In order to keep support force more accurate, pass through air pressure in the application
System 32 is pressurizeed for hydraulic system 31, is accurately controlled to support force with realizing.
Baric systerm in the application includes gas cylinder, gas cylinder main valve, pressure reducing valve, air gauge and tracheae.Tracheae connects with gas cylinder
It connects, for being supplied for pressure system；Gas cylinder main valve is arranged on gas cylinder, the on off operating mode for controlling tracheae；Pressure reducing valve is arranged
On tracheae, the pressure for adjusting output gas；Air gauge includes two gauge outfits, and one of gauge outfit is used to indicate in gas cylinder
Air pressure, another gauge outfit are used to indicate the atmospheric pressure value for being output to tracheae.
Further, in calibration process, barometer 34 is used to detect the atmospheric pressure in external environment, to reflect in real time
Atmospheric pressure in calibration facility local environment, and then baric systerm 32 is allow to be adjusted to hydraulic system 31 according to real-time pressure
Pressure control.The pressure that calibration process in the application applies is realized by automatic weight loading system 33.Automatic weight
Code loading system 33, for providing the pressure for needing to demarcate, sensing to be calibrated is applied to by hydraulic system 31 in calibration process
Device 70.
Preferably, the sensor to be calibrated 70 of four same models can be set on the pedestal 10 in the application, and calibration is set
It is standby once to demarcate four sensors to be calibrated.It can only once be demarcated for a sensor in compared with the existing technology, this
The technical solution of application substantially increases calibration efficiency.
Certainly, in the unshowned alternate embodiment of attached drawing of the present invention, it is suitable to be arranged on pedestal 10 as needed
The sensor to be calibrated 70 of quantity, to meet the needs demarcated or produced.
Further, the hydraulic system 31 in the application includes hydraulic cylinder and the piston rod being arranged in hydraulic cylinder, piston
There is interval, baric systerm 32 is for driving piston rod, to realize to hydraulic pressure between the outside wall surface of bar and the internal face of hydraulic cylinder
System 31 is pressurizeed.
Specifically, there is interval, to make gas between the outside wall surface of the piston rod in the application and the internal face of hydraulic cylinder
Pressure system 32 drives piston rod under pressure, not have frictional resistance between piston rod and hydraulic cylinder to hydraulic system, make pressurization
More precisely, it is furthermore achieved and support force is accurately controlled, and then ensure that the accuracy of calibration result.
In an embodiment of the present invention, calibration facility further includes sensor detection module, sensor detection module respectively with
Control module and sensor to be calibrated 70 connect, to detect and reflect the sensor parameters of sensor 70 to be calibrated.
Specifically, sensor detection module is used to detect the parameters of sensor 70 to be calibrated, sensor detection module
It is all connected with control module and sensor to be calibrated 70, the every sensor parameters detected is fed back into user, with determination
The calibration plan of sensor 70 to be calibrated.
Sensor detection module includes sensor data transmission line, data acquisition box 40 and USB data transmission line.Wherein,
Data acquisition box 40 acquires the sensor parameters of sensor 70 to be calibrated, and control module is sent to by USB data transmission line.
As shown in Figure 1, in the embodiment of the present invention, control module includes measuring hub 50 and data processing unit 60,
Temperature setting unit 20 and pressure setup unit 30 are connect by measuring hub 50 with data processing unit 60.
In the technical solution of the application, measures hub 50 and be used for temperature setting unit 20 and data processing unit 60
It connects, by 20 set temperature parameter feedback of temperature setting unit to data processing unit 60, for data processing unit
60 carry out data processing；It measures hub 50 to connect pressure setup unit 30 and data processing unit 60, by pressure
The pressure parameters such as pressure source information, pressure-loaded information in setup unit 30 feed back to data processing unit 60, for data
Processing unit 60 carries out next step data processing.
Preferably, data processing unit 60 includes processor and memory, and memory is equipped with calibration software, processor fortune
Row calibration software treats the calibration of calibration sensor 70 to realize.
Temperature parameter and pressure parameter are fed back to data processing unit 60, data processing list by the calibration system in the application
The processor of member 60 is for handling parameters, and memory is used for every test parameter and treated that data carry out
Storage.Above-mentioned setting records artificial data in the prior art and data processing is converted into calibration system processing, greatlys save
Time, and record and storage is realized by calibration system, record is accurate, and computational efficiency is high.
Specifically, the calibration software in the application includes calibration coefficient the Fitting Calculation module, calibration result evaluation module, mark
Determine parameter read-in module.
Calibration system the Fitting Calculation module is joined with the temperature parameter, pressure parameter and sensor recorded in calibration process
Number is input parameter, when system independent variable is the pressure and temperature that environment is each calibration point, the bias power frequency number of sensor output
Value and temperature frequency numerical value, dependent variable are system standard pressure and normal temperature, these numerical value constitute one group of overdetermined equation, module
The solution of residual error minimum, the as calibration coefficient of sensor are obtained using polynomial least mean square fitting computational methods.
The calibration coefficient that calibration result evaluation module is then obtained according to the Fitting Calculation recalculates each calibration point and passes through biography
The pressure value and temperature value that sensor measures, and the difference divided by sensor of calculating and corresponding points NPT Normal Pressure and Temperature value
Full scale value obtains the full scale relative error of each calibration point, maximum relative error value is taken to evaluate calibration result, is less than and refers to
Definite value shows to demarcate successfully.
After calibration is completed and reaches criterion of acceptability, being shown in the form of 16 systems will store calibrating parameters writing module
The calibration coefficient of sensor internal, after confirmation, you can the storage unit that new calibration coefficient is written to sensor automatically, for reality
It measures and uses.
As shown in Fig. 2, the embodiments of the present invention also provide a kind of scaling method, scaling method is set using above-mentioned calibration
Standby to be demarcated, scaling method includes：
Step S01：Reflect by context detection module detection and in real time the temperature parameter and pressure of temperature setting unit 20
The pressure parameter of setup unit 30.
Calibration facility in the application has temperature setting unit 20 and pressure setup unit 30, carry out calibration process it
Before, environment monitoring module detects the pressure parameter of the temperature parameter and pressure setup unit 30 of temperature setting unit 20, and passes through
The parameters detected are fed back to data processing unit 60 and carry out data processing by the measurement hub 50 of control module.It is above-mentioned
Setting ensure that follow-up calibration process can carry out in correctly calibration environment, and environment monitoring module may be implemented to demarcating ring
The automatic detection in border saves a large amount of manpower and materials, and detection efficiency is high, saves a large amount of time, improves calibration effect
Rate.
Further, environment monitoring module includes pressure detecting module, and pressure setup unit 30 is loaded including automatic weight
System 33, in step S01, scaling method further includes the pressure parameter for detecting automatic weight loading system 33.
Specifically, the pressure source type of the pressure detecting module detection automatic weight loading system 33 in context detection module
Number, the parameters such as pressure unit, and above- mentioned information is fed back into data processing unit 60 by measuring hub 50 and is carried out at data
Reason.
Preferably, in this application, environment monitoring module further includes temperature detecting module, in step S01, scaling method
It further include the temperature parameter for detecting temperature setting unit 20.
Specifically, the ginsengs such as model, Current Temperatures, temperature regulating range of temperature detecting module detection temperature setting unit 20
Number, and above- mentioned information is fed back into the progress data processing of data processing unit 60 by measuring hub 50.
Above-mentioned setting by the parameter of each environment component before executing demarcating steps to carrying out test feedback, and above-mentioned steps
It is automatically performed by calibration facility, saves the time, improve efficiency.
Further, in step S01, scaling method further includes detection and reflects the sensor ginseng of sensor 70 to be calibrated
Several steps.
After calibration facility is completed to the detection of temperature parameter and pressure parameter, the scaling method of the application further includes leading to
The sensor parameters that sensor detection module detection detects sensor 70 to be calibrated are crossed, and will be to be calibrated by measuring hub 50
The sensor parameters of sensor 70 feed back to data processing unit, to be ready for subsequent calibration process.
As shown in Fig. 2, in an embodiment of the present invention, after step S01, scaling method further includes automatic Calibration step
Suddenly, automatic Calibration step includes：
Step S10：By temperature setting unit 20, preset temperature value T is set, wherein T=T1 ... ..., Ti, i=1,
2 ... ..., m；
Step S20：Preset pressure value P is set by pressure setup unit 30, wherein P=P1 ... ..., Pj, j=1,
2 ... ..., n；
Step S30：Work as T=Ti, when P={ P1 ... ..., Pj }, detects the sensor parameters of sensor 70 to be calibrated；Work as T
When=Ti+1, P={ P1 ... ..., Pj }, the sensor parameters of sensor 70 to be calibrated are detected, wherein m and n is positive integer.
Specifically, it demarcates and plans for the formulation of sensor 70 to be calibrated first：It is to be calibrated by temperature setting unit 20
M preset temperature value is arranged in sensor 70, and the pressure sensor that preset temperature value herein can demarcate as needed is in underground work
The environment temperature of work is set；It is that n preset pressure value is arranged in sensor 70 to be calibrated by pressure setup unit, herein
The pressure sensor that preset pressure value can be demarcated as needed is set in the pressure of underground work born.By above-mentioned
Setting, can simulate the working environment of sensor 70 to be calibrated, to ensure calibrated sensor in its work to the greatest extent
Precision in the process.
Secondly, it demarcates after the completion of plan, the measurement hub 50 of control module can be by the preset temperature of user setting
Value and preset pressure value are transmitted to data processing unit, the memory storage parameters and preset value of data processing unit 60
Afterwards, calibration software executes calibration process according to the calibration plan of user.
Preferably, the calibration plan in the application includes preset multiple temperature values and multiple pressure values, in calibration process
In, preset temperature value T is often set, calibration software can correspond to n preset pressure value of calibration, and will be generated in calibration process
The processor that sensor parameters are sent to data processing unit 60 carries out data processing；Complete the corresponding n of a preset temperature value T
After the calibration process of a preset pressure value, the temperature for demarcating environment is set as next temperature by temperature setting unit 20 to be preset
Value, continues to demarcate each pressure preset, until m temperature preset value is calibrated completion, that is, completes calibration process.
In the embodiment of the present invention, it includes place that sensor 70 to be calibrated, which has specified calibration coefficient, data processing unit 60,
Device is managed, after step S30, automatic Calibration step further includes：
Step S40：Sensor parameters are compared after processor is handled with specified calibration coefficient.
Further, in embodiments herein, sensor 70 to be calibrated has calibrated error, after the step s 40, from
Dynamic demarcating steps further include judgment step, and judgment step includes：
Step S41：Judge whether the difference between practical calibration coefficient and specified calibration coefficient is more than or equal to calibrated error,
If it is, the calibration coefficient of sensor 70 to be calibrated is practical calibration coefficient, if it is not, then the calibration of sensor to be calibrated 70
Coefficient is specified calibration coefficient.
Specifically, if the difference between practical calibration coefficient and specified calibration coefficient is more than or equal to calibrated error, illustrate
The specified calibration error of sensor 70 to be calibrated is larger, and the practical calibration coefficient write-in that calibration facility is fitted is to be calibrated
Sensor 70；If the difference between practical calibration coefficient and specified calibration coefficient is less than calibrated error, illustrate sensing to be calibrated
The specified calibration coefficient of device 70 is in error tolerance band, therefore specified calibration coefficient is still valid, can continue to preserve use.
In the embodiment of the present invention, data processing unit 60 further includes memory, after automatic Calibration step, calibration side
Method further includes the storing step being stored in practical calibration coefficient and sensor parameters in memory.
Further, after storing step, scaling method further includes report generation step.
Specifically, after the completion of calibration process, data processing unit 60 handles data and preserves data, the calibration in the application
Software includes calibration coefficient the Fitting Calculation module, calibration result evaluation module, calibrating parameters writing module.
Calibration system the Fitting Calculation module is joined with the temperature parameter, pressure parameter and sensor recorded in calibration process
Number is input parameter, when system independent variable is the pressure and temperature that environment is each calibration point, the bias power frequency number of sensor output
Value and temperature frequency numerical value, dependent variable are system standard pressure and normal temperature, these numerical value constitute one group of overdetermined equation, module
The solution of residual error minimum, the as calibration coefficient of sensor are obtained using polynomial least mean square fitting computational methods.
The calibration coefficient that calibration result evaluation module is then obtained according to the Fitting Calculation recalculates each calibration point and passes through biography
The pressure value and temperature value that sensor measures, and the difference divided by sensor of calculating and corresponding points NPT Normal Pressure and Temperature value
Full scale value obtains the full scale relative error of each calibration point, maximum relative error value is taken to evaluate calibration result, is less than and refers to
Definite value shows to demarcate successfully.
After calibration is completed and reaches criterion of acceptability, being shown in the form of 16 systems will store calibrating parameters writing module
The calibration coefficient of sensor internal, after confirmation, you can the storage unit that new calibration coefficient is written to sensor automatically, for reality
It measures and uses.
Above-mentioned whole process only needs manual operation in set temperature preset value and pressure preset, other processes by
Data processing unit 60 is completed, simple and fast, and nominal data is accurate, saves a large amount of manpower and time, ensure that calibration
As a result accuracy, improves stated accuracy.
Preferably, context detection module includes temperature detecting module；Before step S20, after step slo, automatically
Demarcating steps further include：
Step S11：The actual temperature value that temperature presets unit is detected by temperature detecting module；
Step S12：Judge whether the actual temperature value detected is equal to preset temperature value T, if so, thening follow the steps
S20, if it is not, then executing makes the step of actual temperature value is equal to preset temperature value T.
Preferably, context detection module includes pressure detecting module；It is automatic to mark after step S20 before step S30
Determining step further includes：
Step S21：The actual pressure value that pressure presets unit is detected by pressure detecting module；
Step S22：Judge whether the actual pressure value detected is equal to preset pressure value P, if so, thening follow the steps
S30, if it is not, then executing makes the step of actual pressure value is equal to preset pressure value P.
Above-mentioned setting ensure that calibration process is carried out at preset temperature value T and preset pressure value P, avoid because of temperature calibration
The temperature or pressure of environment are not up to preset value and influence stated accuracy.
The stress state consistent with pressure sensor underground work application environment can be arranged in the calibration facility of the application, and
The hot properties for having fully considered underground work is tested multiple by the way that temperature setting unit 20 is arranged under condition of different temperatures
Different pressure values is demarcated until all points and is completed, then carries out analysis meter to measured data point by fitting algorithm
It calculates, obtains new calibration coefficient, and recalculate the measurement error of sensor 70 to be calibrated according to new calibration coefficient.If calibration
Worst error is more than prescribed requirement afterwards, then sensor is written in new calibration coefficient, that is, completes the calibration to the sensor.It should
System is automatically performed under the control of the computer completely, and easy to operate, calibration facilitates, can save a large amount of device authentication time, can
Make absolute pressure, gauge pressure and negative pressure calibration to measure.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：Calibration facility
With temperature setting unit, thus can be needed for sensor settings environment temperature to be calibrated according to user；Pressure setting is single
Member can be that pressure is arranged in sensor to be calibrated, and for the pressure sensor of underground work, the temperature of the application is set
Order member can simulate downhole temperature environment, and pressure setup unit simulates down-hole pressure environment, provided for sensor to be calibrated and
The same temperature and pressure environment of operating environment, ensure that calibration result is accurate.Further, environment monitoring module, pressure are set
Order member and temperature setting unit are connect with controller, the temperature and pressure in detection and in real time reflection calibration process, with right
Calibration environment adjusts in time, keeps the environment of calibration process consistent with the working environment of sensor to be calibrated, and then reach and carry
The effect of high calibration mass.Therefore, it by above-mentioned setting, realizes and calibration process is automatically controlled, simple to operate, mark
It is accurate to determine result, improves calibration mass.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of calibration facility of pressure sensor, which is characterized in that the calibration facility includes：
Temperature setting unit (20), the temperature for setting sensor to be calibrated (70)；
Pressure setup unit (30), the pressure for setting the sensor to be calibrated (70)；
Control module；
Context detection module, wherein the context detection module and the temperature setting unit (20) with the control module
Connection is to detect and reflect in real time the temperature parameter of the temperature setting unit (20), the context detection module and the pressure
Setup unit (30) is connect with the control module to detect and reflect in real time the pressure ginseng of the pressure setup unit (30)
Number.
2. calibration facility according to claim 1, which is characterized in that the context detection module includes：
Temperature detecting module is connect with the control module and the temperature setting unit (20) respectively, with detection and anti-in real time
Reflect the temperature parameter；
Pressure detecting module is connect with the control module and the pressure setup unit (30) respectively, with detection and anti-in real time
Reflect the pressure parameter.
3. calibration facility according to claim 2, which is characterized in that the temperature parameter includes the temperature setting unit
(20) model and Current Temperatures；The pressure parameter includes the pressure source model of the pressure setup unit (30), pressure list
Position and environmental pressure.
4. a kind of scaling method of pressure sensor, which is characterized in that the scaling method uses any in claims 1 to 3
Calibration facility described in is demarcated, and the scaling method includes：
Step S01：The temperature parameter of the temperature setting unit (20) is detected and reflected in real time by the context detection module
With the pressure parameter of the pressure setup unit (30).
5. scaling method according to claim 4, which is characterized in that the context detection module includes pressure detecting mould
Block, the pressure setup unit (30) includes automatic weight loading system (33), in the step S01, the scaling method
It further include the pressure parameter that the automatic weight loading system (33) is detected by the pressure detecting module.
6. scaling method according to claim 4, which is characterized in that after the step S01, the scaling method also wraps
It includes：The step of detecting and reflecting the sensor parameters of the sensor to be calibrated (70).
7. scaling method according to claim 4, which is characterized in that detecting and reflecting the sensor to be calibrated (70)
Sensor parameters the step of after, the scaling method further includes automatic Calibration step, and the automatic Calibration step includes：
Step S10：Preset temperature value T is set by the temperature setting unit (20), wherein T=T1... ..., Ti, i=1,
2 ... ..., m；
Step S20：Preset pressure value P is set by the pressure setup unit (30), wherein P=P1... ..., Pj, j=1,
2 ... ..., n；
Step S30：Work as T=Ti, P={ P1... ..., PjWhen, detect the sensor parameters of sensor to be calibrated (70)；Work as T=
Ti+1, P={ P1... ..., PjWhen, detect the sensor parameters of the sensor (70) to be calibrated, wherein m and n is just whole
Number.
8. scaling method according to claim 7, which is characterized in that the control module includes data processing unit
(60), the sensor to be calibrated (70) has specified calibration coefficient, and the data processing unit (60) includes processor, in institute
After stating step S30, the automatic Calibration step further includes：
Step S40：The sensor parameters obtain practical calibration coefficient after processor processing, by the practical calibration system
Number is compared with specified calibration coefficient.
9. scaling method according to claim 7, which is characterized in that before the step S20, after step slo,
The automatic Calibration step further includes：
Step S11：The actual temperature value that temperature presets unit is detected by temperature detecting module；
Step S12：Judge whether the actual temperature value detected is equal to the preset temperature value T, if it is, executing the step
Rapid S20, if it is not, then executing makes the step of actual temperature value is equal to the preset temperature value T.
10. scaling method according to claim 8, which is characterized in that the context detection module includes pressure detecting mould
Block；Before the step S30, after the step S20, the automatic Calibration step further includes：
Step S21：The actual pressure value that pressure presets unit is detected by the pressure detecting module；
Step S22：Judge whether the actual pressure value detected is equal to the preset pressure value P, if it is, executing the step
Rapid S30, if it is not, then executing makes the step of actual pressure value is equal to the preset pressure value P.
11. scaling method according to claim 8, which is characterized in that there is the sensor (70) to be calibrated calibration to miss
Difference, after the step S40, the automatic Calibration step further includes judgment step, and the judgment step includes：
Step S41：It is described to judge whether the difference between the practical calibration coefficient and the specified calibration coefficient is more than or equal to
Calibrated error, if it is, the calibration coefficient of the sensor to be calibrated (70) is the practical calibration coefficient, if it is not, then
The calibration coefficient of the sensor to be calibrated (70) is the specified calibration coefficient.
12. scaling method according to claim 11, which is characterized in that the data processing unit (60) further includes storage
Device, after the automatic Calibration step, the scaling method further includes joining the practical calibration coefficient and the sensor
The storing step of number storage in the memory.
13. scaling method according to claim 12, which is characterized in that after the storing step, the calibration side
Method further includes report generation step.
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| CN111289177A (en) * | 2020-02-19 | 2020-06-16 | 北京大成国测科技有限公司 | Pressure sensor range calibration method and pressure sensor with customized range |
| CN112539861A (en) * | 2019-09-23 | 2021-03-23 | 北京金风科创风电设备有限公司 | Precision calibration method and calibration device for stretcher and calibration data acquisition equipment |
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| CN116448314A (en) * | 2023-06-12 | 2023-07-18 | 乐山市计量测试所 | Independent pressure source and pressure gauge online detection method |
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