CN110231108A - The caliberating device and scaling method of temperature sensor - Google Patents
The caliberating device and scaling method of temperature sensor Download PDFInfo
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- CN110231108A CN110231108A CN201810179513.1A CN201810179513A CN110231108A CN 110231108 A CN110231108 A CN 110231108A CN 201810179513 A CN201810179513 A CN 201810179513A CN 110231108 A CN110231108 A CN 110231108A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/002—Calibrated temperature sources, temperature standards therefor
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a kind of caliberating device of temperature sensor and methods, for demarcating the temperature sensor in power electronic control system.The caliberating device integrates in power electronic control system, including host computer, high voltage power supply, electronic load and temperature controller.The scaling method is fitted actual temperature deviation using quadratic functionThe sampled value of temperature sensor is modified after corrected parameter A, B and C is calculated.Caliberating device of the invention integrates directly in power electronic control system, and hardware is not changed, and Material Cost is reduced；The present invention is fitted the temperature sampling deviation of temperature sensor to be calibrated using quadratic function, improves the sampling precision of temperature sensor, entire calibration process by power electronic control system complete independently, reduces human cost substantially；When demarcating multiple temperature sensors with batch, the present invention is further optimized to scaling method, also improves the working efficiency of calibration while guaranteeing temperature sensor sampling precision.
Description
Technical field
The present invention relates to power electronics control field more particularly to the caliberating devices and scaling method of temperature sensor.
Background technique
Power electronic control system (PEU) is integrated with electric machine controller, DC-DC (DC-DC) converter constant power electricity
Subassembly can also charge to external battery, it can be achieved that control to motor.It is applied in fields such as space flight navigation, electric cars
It must compare wide.
In general, pure electric vehicle/mixed dynamic electric car power electronic control system (PEU) is by inverter, DC-DC converter
It is formed with water-cooling system, inverter is fixed on the upside water-cooled plate of water-cooling system, and DC-DC converter is fixed on downside water-cooled plate.
Inverter is responsible for the driving and control function of power electronics, and DC-DC converter is responsible for for high-voltage electricity being converted into low pressure Electricity Functional.Its
In, coolant water temperature is a very important parameter in PEU system, and various functions such as overheat protector and temperature drop volume etc. are exactly
It is realized based on coolant water temperature.Originally, PEU system only has a temperature sensor in inverter side.Due to special original
Cause, inverter side temperature sensor installation site is far from water-cooled plate, and when inverter being caused to work, inverter side temperature sensor is adopted
Sample precision is poor.Then increase a temperature sensor in DC-DC converter side, the temperature sensor when arrangement more
Close to water-cooled plate, can theoretically there be higher sampling precision.However the heat that the temperature sensor will receive DC-DC converter is made
With so that the sampling error of the temperature sensor changes with the temperature of converter.In order to solve adopting for the temperature sensor
Sample error problem can take provision for thermal insulation, but this will increase installation and Material Cost.In addition, due to temperature sensor
There are error, this, which is required, is modified the temperature sensor of each PEU for inconsistency and installation process.
Summary of the invention
The purpose of the present invention is to provide a kind of caliberating device of temperature sensor and methods, to solve power electronics control
In system as the drift of temperature sensor itself, the drift of installation process and the heat effect of DC-DC converter and caused by temperature
Spend sensor sample error.
In order to achieve the above object, the present invention provides a kind of caliberating devices of temperature sensor, for demarcating electric power electricity
Temperature sensor in sub-control system, the caliberating device integrate in the power electronic control system, including host computer,
High voltage power supply, electronic load and temperature controller；The power electronic control system respectively with the host computer, high voltage power supply,
Electronic load and water temperature regulater are connected, wherein the power electronic control system includes temperature sensor to be calibrated, power supply
Converter, converter controller and cooling system, the temperature sensor to be calibrated are linear temperature sensor, for measuring
The temperature of the cooling system, the converter controller have detection, control, calculating and store function；The high voltage power supply
It is powered by the power electronic control system to the electronic load；The temperature controller and power electronics control are
The cooling system of system is connected.
Optionally, the host computer has control and store function.
Optionally, the temperature sensor to be calibrated is platinum resistance thermometer sensor,.
Optionally, the temperature sensor to be calibrated is fixed on the same of the cooling system with the supply convertor
Side.
Optionally, the converter controller has fault alarm function.
In order to achieve the above object, the present invention also provides a kind of scaling methods with temperature sensor, including walk as follows
It is rapid:
Any one of the above calibration of sensor device is provided, system is controlled to the power electronics by the host computer
System issues calibration instruction；
Regulate and control the supply convertor by the converter controller, the output of Xiang Suoshu electronic load it is a series of from zero to
The stabling current I that rated value gradually increasesK, while the institute that the temperature controller measures is acquired by the converter controller
State the temperature T of cooling systemref_KThe cooling system temperature T measured with the temperature sensor to be calibrateddcdc 0_K；
Temperature deviation T is fitted by converter controller quadratic functionerror(IK)=Tdcdc0_K- Tref_K, described
The deviation of temperature sensor measured temperature to be calibratedAccording to collected a series of
IK、Tdcdc 0_KAnd Tref_KValue, which calculates corrected parameter A, B and C and will calculate gained corrected parameter A, B and C, is written the converter
In the storage medium of controller.
Further, when supply convertor output electric current is IKWhen, after the temperature sensor amendment to be calibrated
Temperature value are as follows:
Optionally, it is advanced before calibration after the calibration that the power electronic control system receives the host computer instructs
Row self-test.
Optionally, it is demarcated using scaling method of the invention with the temperature in a batch of multiple power electronic control systems
When sensor, simplified processing can be done, is included the following steps:
Temperature sensor in one power electronic control system is calculated using above-mentioned calibration of sensor method
Corrected parameter, and described corrected parameter A, B and C be written in the storage medium of the host computer as the control of following needs electronics
The default corrected parameter of temperature sensor in system processed；
Choose the reference operating condition of temperature adjustmemt, the output electric current I of the supply convertorKWhen for definite value, acquisition is corresponding
Tdcdc 0_K、Tref_KIt is worth and reads default corrected parameter A, B and C, calculates amendment temperature:
It calculates with reference to the revised temperature value T of temperature sensor to be calibrated under operating conditiondcdc1_KWith Tref_KDifference
Δ T=Tdcdc 1_K- Tref_K；
The selected temperature deviation maximum value M allowed with reference to temperature sensor to be calibrated described under operating condition, compares Δ T and M
The size of value；
If Δ T<M, corrected parameter continues to use the default corrected parameter, if Δ T>=M, according to above-mentioned scaling method meter
Calculation obtains new corrected parameter A1、B1And C1Until Δ T < M, finally gained is met described in the corrected parameter write-in of condition Δ T < M
In the storage medium of converter controller and the host computer.
Further, it is demarcated using scaling method of the invention in a batch of multiple power electronic control systems
When temperature sensor, it can also optimize as follows:
Using above-mentioned calibration of sensor method, temperature sensor in a power electronic control system is calculated
Corrected parameter, and described corrected parameter A, B and C be written in the storage medium of the host computer and be controlled electronically as following needs
The default corrected parameter of temperature sensor in system；
Choose the reference operating condition of temperature adjustmemt, the output electric current I of the supply convertorKWhen for definite value, acquisition is corresponding
Tdcdc 0_K、Tref_KIt is worth and reads default corrected parameter A, B and C, calculates amendment temperature:
It calculates with reference to the revised temperature value T of temperature sensor to be calibrated under operating conditiondcdc1_KWith Tref_KDifference
Δ T=Tdcdc 1_K- Tref_K；
The selected temperature deviation maximum value M allowed with reference to temperature sensor to be calibrated described under operating condition, compares Δ T and M
The size of value；
If Δ T<M, corrected parameter continues to use the default corrected parameter, if Δ T>=M, Δ T is assigned to corrected parameter
C obtains new corrected parameter C1, corrected parameter A, B are constant, finally by gained corrected parameter be written the converter controller with
In the storage medium of the host computer.
Calibration of sensor device of the invention integrates directly in power electronic control system, does not change in hardware
In the case where, the sampling precision of temperature sensor is only just improved in such a way that software is demarcated, and reduces Material Cost；This hair
Bright calibration of sensor method is adopted using temperature sensor to be calibrated in quadratic function fitting power electronic control system
Sample deviation, it is convenient that temperature sensor is modified, the sampling precision of temperature sensor is effectively improved, and it is entire calibrated
Cheng Jiben reduces human cost by power electronic control system complete independently；It is demarcated using scaling method of the invention same
When temperature sensor in multiple power electronic control systems of batch, also scaling method is further simplified, is being improved
The working efficiency of calibration is also improved while temperature sensor sampling precision.
Detailed description of the invention
Fig. 1 be coolant water temperature it is constant when temperature sensor sampling value with output electric current change situation schematic diagram；
Fig. 2 is power electronic control system calibration of sensor device of the invention；
Fig. 3 is the power electronic control system calibration of sensor method schematic diagram of the embodiment of the present invention one；
The calibration of sensor flow chart of Fig. 4 embodiment of the present invention one
Fig. 5 is the temperature deviation matched curve that the embodiment of the present invention one obtains；
Fig. 6 is calibration amendment front and back temperature comparisons' figure that the embodiment of the present invention one obtains；
Fig. 7 is the power electronic control system calibration of sensor method schematic diagram of the embodiment of the present invention two；
Fig. 8 is the calibration of sensor flow chart of the embodiment of the present invention two；
Fig. 9 is the power electronic control system calibration of sensor method schematic diagram of the embodiment of the present invention three；
Figure 10 is the calibration of sensor flow chart of the embodiment of the present invention three；
Wherein, 1- host computer, 2- high voltage power supply, 3- power electronic control system, 31- water-cooling system, 4- electronic load, 5-
Water temperature regulater, 6- fieldbus.
Specific embodiment
A specific embodiment of the invention is described in more detail below in conjunction with schematic diagram.According to following description and
Claims, advantages and features of the invention will become apparent from.It should be noted that attached drawing is all made of very simplified form and
Using non-accurate ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Inventor is after the power electronic control system for studying existing electric car, discovery: when DC-DC converter works
For high temp objects, the heat of converter can all be reached temperature sensor by cross-ventilation heat exchange and heat radiation, to cause temperature
The temperature rise of sensor generates sampling error.The fever of DC-DC converter follows Joule's law, the i.e. heat and stream of conductor generation
Overcurrent it is square directly proportional, and under certain radiating condition, temperature rise and calorific value are in a linear relationship, therefore temperature sensor is adopted
Sample error will be in square with electric current.
It is certain steady state value T that Fig. 1, which show coolant water temperature,ref_KWhen, the temperature sensor crude sampling of DC-DC converter side
Temperature value Tdcdc 0_KWith the change situation of output electric current, in figure 5 it can be seen that with the increase of electric current, original temperature sampled value
Tdcdc 0_KError similar to square times increase.Therefore the deviation of the temperature sampling value can be fitted using quadratic function
Terror(IK), that is, second order polynomial can be used to be fitted the deviation of the temperature sampling value:
It, can be according to electric current I as long as being aware of parameter A, B and the value of CKCalculate the deviation T under the electric currenterror(IK), finally adopt
With crude sampling temperature value Tdcdc 0_KSubtract calculated temperature deviation value Terror(IK) it is revised temperature value
Tdcdc 1_K, revised temperature value is are as follows:
Wherein, parameter A, B and the specific calculating process of C are as follows: make DC-DC converter in running order, adjust its output
Electric current IK, it is made to export a series of electric current I being incremented by from zero to maximum valueK；It calculates and records different output current IKLower temperature
Deviation Terror(IK), deviation Terror(IK) can be by formula Terror(IK)=Tdcdc0_K- Tref_KIt is calculated, Tref_KFor
The actual temperature value for the cooling water that external temperature sensors of high precision measures；It reuses formula (1)-(10) and calculates parameter A, B
And C.
Embodiment one
Based on this, the present invention provides the caliberating device and method of a kind of temperature sensor, for demarcating power electronics control
Temperature sensor in system.
As shown in Fig. 2, being calibration of sensor device of the invention, which, which directly controls in power electronics, is
It being integrated on system 3, the present invention does not have to power electronic control system 3 to dismantle demarcates temperature sensor to be calibrated again, but
Temperature sensor to be calibrated is corrected in such a way that software is demarcated in power electronic control system 3.Wherein, power electronics control
Host computer 1, high voltage power supply 2, electronic load 4 and water temperature regulater 5 are integrated in system 3 processed, power electronic control system 3 is distinguished
It is communicatively coupled with host computer 1, high voltage power supply 2, electronic load 4 and water temperature regulater 5 by fieldbus 6, high voltage power supply 2
By power electronic control system 3 to electronic load 4 power, power electronic control system 3 include temperature sensor to be calibrated,
Supply convertor (DC-DC converter), converter controller and water-cooling system 31, water temperature regulater 5 and power electronics control are
Water-cooling system 31 in system 3 is connected.
Further, host computer 1 has control and store function, and calibration instruction can be issued to power electronic control system 3,
And it is subjected to, stores the corrected parameter fed back in power electronic control system 3.
Further, the temperature sensor to be calibrated is linear temperature sensor, i.e. the lift-off value of its temperature and outer
Boundary's calorific value is in a linear relationship.The temperature sensor to be calibrated is fixed on the supply convertor (DC-DC converter)
The same side of water-cooling system 31 mostly uses the temperature change to coolant liquid for measuring the temperature of coolant liquid in water-cooling system 31
Than more sensitive water temperature sensor, such as good linearity, platinum resistance thermometer sensor, with high accuracy, when temperature changes between 0 to 100 DEG C, most
Big non-linear deviation is less than 0.5 DEG C.
Further, the converter controller has detection, control, calculating and store function.The convertor controls
There is device self detecting function can work normally with confirming, optionally, the converter controller also has fault alarm function
Can, when detecting certain malfunctions, capable of emitting alarm to remind producers' maintenance and inspection in time.The convertor controls
Device has control function, the voltage and electric current that the controllable supply convertor (DC-DC converter) externally exports.The transformation
Device controller also has calculating and store function, can acquire what water temperature regulater 5 was measured with the temperature sensor to be calibrated
The temperature T of coolant liquid in the water-cooling systemref_K、Tdcdc 0_K, and in combination with current value IKGinseng is calculated by formula (1)-(10)
Number A, B and C, also parameter A, B and C can be written in the storage medium of the converter controller in case power electronic control system
3 in subsequent normal operation the temperature sensor to be calibrated can be corrected in time by the converter controller collected
The temperature value of coolant liquid.Entire calibration process is substantially all in the power electronic control system 3 especially converter controller
It completes, reduces human cost.
Optionally, fieldbus 6 uses the common CAN bus of automotive field, and materials are convenient, seeks without going time-consuming and laboriously
Other buses are sought, production cost can be reduced.
Optionally, the storage medium of host computer 1 and the converter controller is EEPROM, can wipe, be written at any time
Data will not lose after storing data and power down.
And how to utilize caliberating device calibration temperature sensor of the invention? as shown in figure 3, and combine Fig. 2 and Fig. 4,
The present invention provides a kind of calibration of sensor method, to demarcate the temperature sensor in power electronic control system, including such as
Lower step:
S1, an above-mentioned power electronic control system calibration of sensor device is provided, it is electric to electric power by host computer 1
Sub-control system 3 issues calibration instruction；
S2, the supply convertor is regulated and controled by the converter controller, to electronic load 4 export it is a series of from zero to
The stabling current I that rated value gradually increasesK, while by the converter controller acquire water temperature regulater 5 measure it is affiliated
The temperature T of coolant liquidref_KThe coolant temperature T measured with the temperature sensor to be calibrateddcdc 0_K；
S3, actual temperature deviation T is fitted using quadratic function by the converter controllererror(IK)=Tdcdc 0_K?
Tref_K, i.e., the deviation of the described temperature sensor measured temperature to be calibrated,According to
A series of collected IK、Tdcdc 0_KAnd Tref_KValue calculates corrected parameter A, B and C and will calculate gained corrected parameter A, B and C
It is written in the storage medium of the converter controller.
Further, as shown in figure 4, power electronic control system 3 demarcates it after the calibration instruction for receiving host computer 1
Before can carry out self-test first to ensure that its various function is normal, if functional failure can sound an alarm in time prompting maintenance.
After obtaining corrected parameter A, B and C, so that it may calculate the revised temperature value of temperature sensor to be calibrated
Are as follows:It is illustrated in figure 5 a certain electricity
The temperature deviation matched curve that power electronic control system uses scaling method of the invention to obtain, wherein output electric current IKFrom 0A
To 150A be incremented by taken 13 groups of different values, temperature deviation is incremented to 8 DEG C from 2 DEG C, it can be seen that the matched curve with it is actual
Temperature deviation sampled point relatively coincide.And Fig. 6 is to be compared using the temperature before and after the scaling method, it can be seen that after calibration amendment
Temperature value Tdcdc 1_KThe a certain steady state value T of coolant water temperature shown in Fig. 1ref_KThere is small fluctuation up and down, temperature to be calibrated passes
The calibration correction result of sensor is highly desirable.
Embodiment two
In the actual production process, it needs to carry out the temperature sensor in each power electronic control system calibration to repair
Just.If using the scaling method in embodiment one to carry out calibration amendment each power electronic control system, need to spend
Many times might as well suitably optimize to reduce workload.For in a batch of multiple power electronic control systems
Temperature sensor selectes one and refers to operating condition, to temperature sensor sleeve in subsequent power electronic control system under the operating condition
With the corrected parameter of temperature sensor in the calibrated power electronic control system in front, calculates and analyze warm under the operating condition
It spends the size of correction value and temperature actual value: if the deviation very little of the two, i.e., in the range of temperature deviation allows, can not have to
Demarcated but directly applied the corrected parameter of temperature sensor in the calibrated power electronic control system in front；If
The deviation of the two is larger, then needs to carry out calibration amendment according to the scaling method of embodiment one.Therefore use the calibration of embodiment one
When method is to calibration amendment is carried out with the temperature sensor in a batch of multiple power electronic control systems, it can be done and be optimized
Processing, as shown in fig. 7, and combine Fig. 8, steps are as follows:
S41, the calibration of sensor method using embodiment one, are calculated a certain power electronic control system medium temperature
The corrected parameter of sensor is spent, and by corrected parameter A0、B0And C0It is written in the storage medium of host computer 1 as following needs electricity
The default corrected parameter of temperature sensor in sub-control system；
S42, the reference operating condition for choosing temperature adjustmemt, i.e., the output electric current I of the described supply convertorKWhen for some definite value,
Acquire corresponding Tdcdc 0_K、Tref_KIt is worth and reads default corrected parameter A0、B0And C0, calculate amendment temperature:
S43, it calculates with reference to the revised temperature value T of temperature sensor to be calibrated under operating conditiondcdc1_KWith Tref_K's
Difference DELTA T=Tdcdc 1_K- Tref_K；
S44, in conjunction with the actual conditions of the power electronic control system, select with reference to the temperature to be calibrated under operating condition
The temperature deviation maximum value M that sensor allows, compares the size of Δ T Yu M value；
If S45, Δ T<M, corrected parameter continues to use the default corrected parameter, if Δ T>=M, according to embodiment one
New corrected parameter A is calculated in scaling method1、B1And C1Until Δ T < M, finally the amendment that gained meets condition Δ T < M is joined
Number is written in the storage medium of the converter controller and host computer 1.I.e. last gained corrected parameter is default corrected parameter
A0、B0And C0, or the new corrected parameter A to be calculated according to the scaling method of embodiment one1、B1And C1。
In this way, which temperature sensor can apply front in the range of deviation allows in some electrical power electronic control system
The corrected parameter of temperature sensor in calibrated power electronic control system, so that staking-out work amount is reduced.It can
Choosing, temperature sensor of the present embodiment in multiple power electronic control systems of same batches a series of to certain is demarcated
When, as shown in figure 8, choosing supply convertor (DC-DC converter) work, in Buck mode, (reduced output voltage, output are less than defeated
Enter), export reference operating condition of the operating condition as temperature adjustmemt of 14V, 100A, and using 1 DEG C (i.e. the value of M is 1) as whether needing
The Rule of judgment demarcated according to the scaling method of embodiment one.Certainly, with reference to the temperature deviation maximum value M of operating condition and permission
It can all be adjusted with actual conditions.
Embodiment three
For the scaling method of embodiment two, passed if applying temperature in the calibrated power electronic control system in front
The corrected parameter of sensor and the deviation that calculates resulting temperature corrected value and temperature actual value is larger, then there is still a need for according to embodiment
One scaling method carries out calibration amendment, and staking-out work amount is still very big.And generally, with a batch of multiple power electronics controls
The performance of temperature sensor and performance related parameter are almost the same in system processed, only have a small numerical value drift, accidentally
In the range of difference allows, it is believed that corrected parameter A, B of temperature sensor are the same in each power electronic control system, performance
Drift is primarily due to the numerical value drift of corrected parameter C.Therefore gained temperature corrected value and temperature can will be calculated by default corrected parameter
The deviation Δ T indirect assignment of degree actual value is prevented its performance drift to parameter C, and revised parameter is denoted as C1Even C1
=-Δ T, and corrected parameter A, B are constant, from the scaling method without using embodiment one again, can be further reduced work
Amount.Therefore the scaling method of embodiment one, can also advanced optimize, as shown in figure 9, and combine Figure 10, the specific steps are as follows:
S51, the calibration of sensor method using embodiment one, are calculated a certain power electronic control system medium temperature
The corrected parameter of sensor is spent, and by corrected parameter A0、B0And C0It is written in the storage medium of host computer 1 as following needs electricity
The default corrected parameter of temperature sensor in sub-control system；
S52, the reference operating condition for choosing temperature adjustmemt, i.e., the output electric current I of the described supply convertorKWhen for some definite value,
Acquire corresponding Tdcdc 0_K、Tref_KIt is worth and reads default corrected parameter A0、B0And C0, calculate amendment temperature:
S53, it calculates with reference to the revised temperature value T of temperature sensor to be calibrated under operating conditiondcdc1_KWith Tref_K's
Difference DELTA T=Tdcdc 1_K- Tref_K；
S54, in conjunction with the actual conditions of the power electronic control system, select with reference to the temperature to be calibrated under operating condition
The temperature deviation maximum value M that sensor allows, compares the size of Δ T Yu M value；
If S55, Δ T<M, corrected parameter continues to use the default corrected parameter, if Δ T>=M, Δ T is assigned to amendment
Parameter C0Obtain new corrected parameter C1, corrected parameter A0、B0It is constant, the converter control finally is written into gained corrected parameter
In the storage medium of device processed and host computer 1.
In the scaling method of this present embodiment, if Δ T < M, last gained corrected parameter is still default corrected parameter
A0、B0And C0；If Δ T >=M, last gained corrected parameter is A0、B0And C1(C1=-Δ T).The method of the present embodiment is into one
Step reduces staking-out work amount, effectively improves calibration efficiency.
In conclusion calibration of sensor device of the invention integrates directly in power electronic control system, hard
In the case that part is not changed, the sampling precision of temperature sensor is only just improved in such a way that software is demarcated, reduces object
Expect cost；In the calibration of sensor method that the embodiment of the present invention one provides, the scaling method is quasi- using quadratic function
Close the temperature sampling deviation of temperature sensor to be calibrated, matched curve coincide with temperature deviation sampled point it is fine, it is quasi- according to this
The sampled value for closing curve amendment temperature sensor, improves the sampling precision of temperature sensor, and entire calibration process substantially by
Power electronic control system complete independently, reduces human cost；It is same in amendment in the embodiment of the present invention two and embodiment three
When temperature sensor in a batch of multiple power electronic control systems, the scaling method of embodiment one is done further excellent
Change, the working efficiency of calibration is also improved while ensure that temperature sensor sampling precision.
The above is only a preferred embodiment of the present invention, does not play the role of any restrictions to the present invention.Belonging to any
Those skilled in the art, in the range of not departing from technical solution of the present invention, to the invention discloses technical solution and
Technology contents make the variation such as any type of equivalent replacement or modification, belong to the content without departing from technical solution of the present invention, still
Within belonging to the scope of protection of the present invention.
Claims (10)
1. a kind of caliberating device of temperature sensor, for demarcating the temperature sensor in power electronic control system, feature
Be, the caliberating device in the power electronic control system integrate, including host computer, high voltage power supply, electronic load and
Temperature controller；The power electronic control system respectively with the host computer, high voltage power supply, electronic load and temperature controller
It is connected, wherein the power electronic control system includes temperature sensor to be calibrated, supply convertor, converter controller
And cooling system, the temperature sensor to be calibrated be linear temperature sensor, the temperature for measuring the cooling system,
The converter controller has detection, control, calculating and store function；The high voltage power supply is controlled by the power electronics
System powers to the electronic load；The temperature controller is connected with the cooling system.
2. calibration of sensor device as described in claim 1, which is characterized in that the host computer has control and storage
Function.
3. calibration of sensor device as claimed in claim 1 or 2, which is characterized in that the temperature sensing to be calibrated
Device is platinum resistance thermometer sensor,.
4. calibration of sensor device as claimed in claim 1 or 2, which is characterized in that the temperature sensing to be calibrated
Device and the supply convertor are fixed on the same side of the cooling system.
5. calibration of sensor device as claimed in claim 1 or 2, which is characterized in that the converter controller has
Fault alarm function.
6. a kind of scaling method of temperature sensor characterized by comprising
It provides just like calibration of sensor device described in any one of claim 1-5, by the host computer to institute
It states power electronic control system and issues calibration instruction；
Regulate and control the supply convertor by the converter controller, the output of Xiang Suoshu electronic load is a series of from zero to specified
The stabling current I that value gradually increasesK, while by the converter controller acquire the temperature controller measure it is described cold
But the temperature T of systemref_KAnd the cooling system temperature T that the temperature sensor to be calibrated measuresdcdc 0_K；
Temperature deviation T is fitted by converter controller quadratic functionerror(IK)=Tdcdc0_K- Tref_K, described wait mark
The deviation of fixed temperature sensor measured temperatureAccording to a series of collected IK、
Tdcdc 0_KAnd Tref_KValue, which calculates corrected parameter A, B and C and will calculate gained corrected parameter A, B and C, is written the converter control
In the storage medium of device processed.
7. calibration of sensor method as claimed in claim 6, which is characterized in that when the output electricity of the supply convertor
Stream is IKWhen, the revised temperature value of temperature sensor to be calibrated are as follows:
8. calibration of sensor method as claimed in claim 6, which is characterized in that the power electronic control system receives
After the calibration instruction of the host computer, self-test is first carried out before calibration.
9. calibration of sensor method as claimed in claim 6, which is characterized in that for demarcating with a batch of multiple electricity
The amendment of the temperature sensor in a power electronic control system is calculated in temperature sensor in power electronic control system
After parameter A, B and C, further includes:
Described corrected parameter A, B and C are written in the storage medium of the host computer as in following needs electronic control system
Temperature sensor default corrected parameter；
Choose the reference operating condition of temperature adjustmemt, the output electric current I of the supply convertorKWhen for definite value, acquisition is corresponding
Tdcdc 0_K、Tref_KIt is worth and reads default corrected parameter A, B and C, calculates amendment temperature:
It calculates with reference to the revised temperature value T of temperature sensor to be calibrated under operating conditiondcdc1_KWith Tref_KDifference DELTA T=
Tdcdc 1_K- Tref_K；
The selected temperature deviation maximum value M allowed with reference to temperature sensor to be calibrated described under operating condition, compares Δ T and M value
Size；
If Δ T<M, corrected parameter continues to use the default corrected parameter, if Δ T>=M, repeatedly the step of claim 6 is calculated
Obtain new corrected parameter A1、B1And C1Until Δ T < M, the change finally is written into the corrected parameter that gained meets condition Δ T < M
In the storage medium of permuter controller and the host computer.
10. calibration of sensor method as claimed in claim 6, which is characterized in that for demarcating with a batch of multiple
Temperature sensor in power electronic control system, the temperature sensor being calculated in a power electronic control system calculate
After obtaining described corrected parameter A, B and C, further includes:
Described corrected parameter A, B and C are written in the storage medium of the host computer as in following needs electronic control system
Temperature sensor default corrected parameter；
Choose the reference operating condition of temperature adjustmemt, the output electric current I of the supply convertorKWhen for definite value, acquisition is corresponding
Tdcdc 0_K、Tref_KIt is worth and reads default corrected parameter A, B and C, calculates amendment temperature:
It calculates with reference to the revised temperature value T of temperature sensor to be calibrated under operating conditiondcdc1_KWith Tref_KDifference DELTA T=
Tdcdc 1_K- Tref_K；
The selected temperature deviation maximum value M allowed with reference to temperature sensor to be calibrated described under operating condition, compares Δ T and M value
Size；
If Δ T<M, corrected parameter continues to use the default corrected parameter, if Δ T>=M, Δ T is assigned to corrected parameter C and is obtained
To new corrected parameter C1, corrected parameter A, B are constant, finally by gained corrected parameter be written the converter controller with it is described
In the storage medium of host computer.
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| CN111797965A (en) * | 2020-06-01 | 2020-10-20 | 宁波大学科学技术学院 | Paper quantity detection method, system, terminal and storage medium thereof |
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