CN103513097B - Hall sensor temperature compensation and Hall sensor for automobile - Google Patents
Hall sensor temperature compensation and Hall sensor for automobile Download PDFInfo
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- CN103513097B CN103513097B CN201210211754.2A CN201210211754A CN103513097B CN 103513097 B CN103513097 B CN 103513097B CN 201210211754 A CN201210211754 A CN 201210211754A CN 103513097 B CN103513097 B CN 103513097B
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Abstract
The present invention relates to current measurement techniques, more particularly to for the Hall sensor temperature compensation of automobile, the Hall sensor based on the compensation method principle and the Auto Electronic Controlled System using the Hall sensor.The Hall sensor temperature compensation for automobile according to the present invention comprises the following steps：Receive the voltage measurement signal of the Hall sensor；Obtain the temperature measurement signal near the Hall sensor；If temperature belongs within preset range, the correction value of electric current to be measured is calculated according to analytic expression, otherwise, then the correction value of the electric current to be measured is calculated using neural network model.According to embodiments of the invention, different compensation methodes is used for different temperature, larger temperature range is adapted to.Electric current after preset range calculates compensation using specific analytic expression, has the advantages that realization is easily and fast high with precision.
Description
Technical field
The present invention relates to current measurement techniques, Hall sensor temperature compensation more particularly to for automobile, it is based on
The Hall sensor of the compensation method principle and the Auto Electronic Controlled System using the Hall sensor.
Background technology
In recent years, auto industry is sharply increased to the demand of current measurement.The field of progress current measurement is needed in vehicle
Close mainly include Motor Control Field and battery detection field, there accurately, real-time current measurement be to realize optimal control
One of precondition.Hall sensor is a kind of current sensing generally used, and the material for manufacturing Hall element is general
For semi-conducting material（Such as silicon, germanium, indium arsenide and indium antimonide）, this cause the output linearity of Hall element be affected by temperature compared with
Greatly.Temperature environment in view of automotive interior is extremely complex, and influence factor is numerous, and this makes error problem become more prominent.
Typical range of temperature is -40 in automobile0C to+1250Between C ,+150 may be reached once in a while0C.At this
It is a huge challenge to electronic technology that accurate current measurement is provided in the range of sample large span.Had been proposed for this industry
A variety of methods that temperature-compensating is carried out to Hall sensor.But current various compensation methodes are handling big temperature dynamic change
Still seem unable to do what one wishes in terms of changing scope, and without unified processing framework, be unfavorable for reduction exploitation and manufacturing cost.
In addition, as energy-saving importance is more and more highlighted, certainly will need automobile electronic system being designed to more
It is compact to save inner space of vehicle, this require Hall sensor to it is integrated and miniaturization direction develop.
The content of the invention
It is an object of the present invention to provide a kind of Hall sensor temperature compensation for automobile, it can adapt to
Big temperature dynamic excursion simultaneously provides high measurement accuracy.
Above-mentioned purpose can be realized by following technical proposal：
A kind of Hall sensor temperature compensation for automobile, the Hall sensor is arranged in the automobile
Near electrified wire, comprise the following steps：
Receive the voltage measurement signal of the Hall sensor；
Obtain the temperature measurement signal near the Hall sensor；
If temperature belongs within preset range, the correction value I of electric current to be measured is calculated according to following formulam：
Here,、、、、WithFor constant, UHAnd UtRespectively described voltage measurement signal and temperature survey
Signal,
Otherwise, then the correction value of the electric current to be measured is calculated using neural network model.
Preferably, in above-mentioned Hall sensor temperature compensation, the neural network model is BP neural network, bag
Contain：
Input layer, it includes two input node u1And u2, lower column signal is inputted respectively：
UHAnd UtRespectively described voltage measurement signal and temperature measurement signal, k1And k2For normaliztion constant；
Hidden layer；
Output layer, it includes an input node y, exports the correction value of the electric current to be measured.
Preferably, in above-mentioned Hall sensor temperature compensation, the activation primitive of the hidden layer and output layer is adopted
Use following form：
Here,Span is between 0.2-0.5.
Preferably, in above-mentioned Hall sensor temperature compensation, the constant、、、、WithIt is logical
Cross the determination of solution following equations：
;;
;;
;;
;;
;;
;;
;;
Here, l=m × n, m are the quantity of temperature sampling point, and n is the quantity of current sample point, UHkFor Hall sensor
K-th of sampled value of voltage measurement signal, UtkFor k-th of sampled value of the temperature measurement signal near Hall sensor.
Preferably, in above-mentioned Hall sensor temperature compensation, the scope of temperature-compensating is -400C to+1250C's
In the range of, and the preset range is -100C to+500Between C.
It is also an object of the present invention to provide a kind of Hall sensor with temperature compensation capability for automobile,
It can adapt to big temperature dynamic excursion and provides high measurement accuracy.
Above-mentioned purpose can be realized by following technical proposal：
A kind of Hall sensor with temperature compensation capability for automobile, comprising：
Hall sensor, it is arranged on the electrified wire in automobile nearby and exported and electricity to be measured in the electrified wire
Flow corresponding voltage measurement signal；
Temperature-sensing element, it is arranged near the hall sensor and output temperature measurement signal；
The signal processing unit being connected with the hall sensor and temperature-sensing element, it is counted as follows
Calculate the correction value I of electric current to be measuredm：
If temperature belongs within preset range, the correction value I of electric current to be measured is calculated according to following formulam：
Here,、、、、WithFor constant, UHAnd UtRespectively described voltage measurement signal and temperature survey
Signal,
Otherwise, then the correction value of the electric current to be measured is calculated using neural network model.
It is also an object of the present invention to provide a kind of electronic control system for hybrid vehicle, it uses energy
Enough adapt to big temperature dynamic excursion and the Hall sensor of high measurement accuracy is provided, it is thus achieved that to hybrid power
The fast and accurately control of automobile.
Above-mentioned purpose can be realized by following technical proposal：
A kind of electronic control system for hybrid vehicle, including：
Electronic controller；
The AC-DC inverter being connected with the motor and battery pack of hybrid vehicle, it is in the electronic controller
Control under, by alternating current be converted to direct current and to the battery pack charge；
The DC-DC converter being connected with the AC-DC inverter and the battery pack, it is in the electronics control
Under the control of device processed, high voltage direct current is converted into low-voltage DC and charged to the battery pack；
The sensor group communicated with electronic controller, including multiple Hall sensors as described above, the hall sensing
Device is arranged on the outlet line of the motor, AC-DC inverter, DC-DC converter and battery pack nearby with survey
Measure the electric current of current through line.
According to embodiments of the invention, different compensation methodes is used for different temperature, larger temperature is adapted to
Spend scope.Electric current after preset range calculates compensation using specific analytic expression is easily and fast high with precision with realizing
Advantage.In addition, combination of the input neuron of the neural network model used using temperature signal and Hall voltage signal
As input, computational accuracy and speed are improved.Furthermore, in one embodiment, use wavelet transformation and restructing device can be with
Interference signal is effectively filtered out, being suitable for sensing element and processing unit needs application scenario apart from each other.
From described further below with reference to accompanying drawing, it will make above and other objects of the present invention and advantage more complete
It is clear.
Brief description of the drawings
Fig. 1 is showing according to neural network model used in the Hall sensor temperature compensation of one embodiment of the invention
It is intended to.
Fig. 2 is the flow chart of the Hall sensor temperature compensation for automobile according to one embodiment of the invention.
Fig. 3 is the schematic diagram of the Hall sensor according to one embodiment of the invention.
Fig. 4 is the schematic diagram of the Auto Electronic Controlled System according to one embodiment of the present of invention.
Embodiment
Describe the embodiment of the present invention to illustrate the present invention below with reference to accompanying drawing.It is to be understood that
It is, what these embodiments were merely exemplary, the spirit and scope for the present invention has no restriction effect.
In this manual, " coupling " one word should be understood to be included in direct transmission energy or signal between two units
Situation, or transmit through one or more third units the situation of energy or signal, and signal bag designated herein indirectly
Include but be not limited to the signal existed in the form of electricity, light and magnetic.In addition, the term of "comprising" and " comprising " etc is represented except tool
Have has directly and beyond the unit clearly stated and step in the specification and in the claims, and technical scheme is not yet
Exclude with the other units do not stated directly or clearly and the situation of step.Furthermore, such as " first ", " second ", "
Three " and the term of " the 4th " etc be not offered as order in terms of time, space, size of unit or numerical value and be only to make
Distinguish each unit or numerical value is used.
The present inventor has found by further investigation, -400C to+1250Within the scope of C so big temperature, for
Influence of the different scopes using different algorithms come compensation temperature to Hall sensor is a preferably technological approaches.
The Hall voltage that electric current to be measured induces in Hall sensor in addition to depending on device architecture and parameter, also by
To the influence of temperature, therefore electric current to be measured can be considered as Hall voltage and the function of temperature.It was found by the inventors of the present invention that
For certain temperature range（Such as -100C to+500C, specific scope and the structure and material parameter phase of hall sensor
Close）, the relation between electric current and Hall voltage measurement signal to be measured and temperature measurement signal can use following simple analytic expression
Make comparisons accurate description：
（1）
Here, ImFor the value of the process temperature correction of electric current to be measured,、、、、WithFor constant, UHAnd Ut
Respectively Hall voltage measurement signal and temperature measurement signal.
Constant is described below、、、、WithScaling method.
For formula（1）The I of determinationm, itself and experimental calibration valueBetween there is error e, to make corrected value and calibration value most
Good fitting, then should make mean square error R minimum.Therefore, R pairs can be made、、、、WithPartial derivative be zero so that
Following equations can be obtained：
（2）
Wherein,
;;
;;
;;（3）
;;
;;
;;
;;
Here,l=m × n, m are the quantity of temperature sampling point, and n is the quantity of current sample point, UHkFor Hall sensor
K-th of sampled value of voltage measurement signal, UtkFor k-th of sampled value of the temperature measurement signal near Hall sensor.Also
It is to say, m temperature sampling point is set first, for each temperature sampling point, n current sample point is set（Namely in wire
Pass to the electric current of known dimensions）, thus measure the sampled value of n voltage signal.When by said temperature sampled value and voltage sample
Value substitutes into above-mentioned equation（2）With（3）Afterwards, you can solve constant、、、、With。
According to embodiments of the invention, for formula（1）Inapplicable temperature range, is treated using neural network model to calculate
Survey the correction value of electric current.
Fig. 1 is according to neural network model used in the Hall sensor temperature compensation of one embodiment of the present of invention
Schematic diagram.As shown in figure 1, the model is using three layers of reverse transmittance nerve network, its comprising one layer of input layer, one layer of hidden layer and
One layer of output layer.Input layer includes 2 input neurons, and output layer includes 1 output neuron.
If it was found by the inventors of the present invention that in two input node u of input layer1And u2It is upper to input lower column signal respectively
The structure of neural network model can effectively be simplified on the premise of precision is ensured and calculating speed is improved：
（4）
UHAnd UtRespectively Hall voltage measurement signal and temperature measurement signal, k1And k2For normaliztion constant.
For hidden layer, the quantity of its node can take various numerical value, such as from 4 to 16 not.Output layer includes one
Individual input node y, exports the correction value of electric current to be measured.For hidden layer and output layer, its activation primitive can use following form：
（5）
Here,Span is between 0.2-0.5.
Fig. 2 is the flow chart of the Hall sensor temperature compensation for automobile according to one embodiment of the invention.
Referring to Fig. 2, in step 210, from the Hall sensor or Hall element near the electrified wire being arranged in automobile
Receiving voltage measurement signal.Because voltage is smaller, therefore amplifier and Hall element can be integrated to amplify sensing
The signal arrived.In addition, temperature-compensating Processing Algorithm can be completed in a processor integrated with Hall element,
Can be in a processor discrete with Hall element（For example it is connected between them by CAN or LIN buses）It is interior to complete.
Then, in step 220, the temperature measurement signal near Hall sensor is obtained.In order to accurately measure Hall member
The temperature of part, can fit together temperature sensor with Hall element.
Step 230 is subsequently entered, judges whether the temperature measured belongs to preset range（Such as -100C to+500C）Within,
If it is judged that being true, then into step 240, according to formula（1）To calculate the correction value I of electric current to be measuredm, otherwise, then enter
Step 250, the correction value of electric current to be measured is calculated using the neural network model shown in Fig. 1.
In step 260, to be measured current value of the output Jing Guo temperature-compensating.
Fig. 3 is the schematic diagram of the Hall sensor according to one embodiment of the invention.
As shown in figure 3, the Hall sensor 30 includes hall sensor 310, temperature-sensing element 320, analog-to-digital conversion
Unit 330, memory 340, digital signal processing unit 350.
Hall sensor 310 is arranged on the electrified wire in automobile nearby and exported and electric current to be measured in electrified wire
Corresponding voltage measurement signal.
Temperature-sensing element 320 is arranged near hall sensor 310 and output temperature measurement signal.Preferably, it is warm
Degree sensing element 320 fits together with hall sensor 310.
AD conversion unit 330 is connected with hall sensor 310 and temperature-sensing element 320, and it is by analog signal shape
The voltage measurement signal and temperature measurement signal of formula are converted to data signal and exported to digital signal processing unit 350.
Memory 340（Such as ROM memory or flash memory）Signal handler and parameter are stored, such as with formula（1）For generation
The algorithm of table and the algorithm based on neural network model shown in Fig. 1.In addition, memory 340 also stores calculating parameter, such as
Formula（1）The constant needed in calculating、、、、With。
Digital signal processing unit 350 receives the voltage signal temperature letter of digital signal form from AD conversion unit 330
Number, and call corresponding algorithm routine to complete the temperature-compensating to electric current to be measured from memory 340 according to temperature value.
Alternatively, the Hall sensor 30 shown in Fig. 3 may also include the digital-to-analogue being connected with digital signal processing unit 350 and turn
Change unit 360 and the amplifying unit 370 being connected with D/A conversion unit 360.D/A conversion unit 360 will pass through temperature-compensating
Electric current to be measured be converted to analog signal and export to amplifying unit 370, amplified output.
Preferably, can be by hall sensor 310, temperature-sensing element 320, AD conversion unit 330, memory
340th, digital signal processing unit 350, D/A conversion unit 360 and amplifying unit 370 are integrated in an IC-components
In.
It is worthy of note that, in the present embodiment using an AD conversion unit 330, Hall is passed in the way of timesharing
The output signal of sensing unit 310 and temperature-sensing element 320 is sampled and made analog-to-digital conversion.But can also be using two moulds
Number converting unit, modulus that the signal that hall sensor 310, temperature-sensing element 320 are exported is sampled and made respectively turns
Change.
Fig. 4 is the schematic diagram of the Auto Electronic Controlled System according to one embodiment of the present of invention.
As shown in figure 4, the electronic control system 40 include electronic controller 410, AC-DC inverter 420, direct current-
DC converter 430 and sensor group 440.
Sensor group 440 includes the above-mentioned Hall sensor described by Fig. 3, and they are installed near electrified wire,
The outlet line of such as motor, AC-DC inverter, DC-DC converter and battery pack is nearby to measure current through line
Electric current.Sensor group 440 can communicate with providing measurement signal through bus with electronic controller 410.
AC-DC inverter 420 is connected with the motor 50 and battery pack 60 of hybrid vehicle, and it is in Electronic Control
Under the control of device 410, alternating current is converted into direct current and charged to battery pack 60.
DC-DC converter 430 is connected with AC-DC inverter 420 and battery pack 60, and it is in electronic controller
Under 410 control, high voltage direct current is converted into low-voltage DC and charged to battery pack 60.
Due to the present invention, therefore this reality can be implemented in a variety of manners under the spirit without departing substantially from essential characteristic of the present invention
The mode of applying is illustrative and not restrictive, because the scope of the present invention is defined by the independent claims, rather than by saying
The definition of bright book, therefore all changes fallen into the border and boundary of claim, or this claim border and boundary
Equivalent is thus forgiven by claim.
Claims (5)
1. a kind of Hall sensor with temperature compensation capability for automobile, it is characterised in that include：
Hall sensor, it is arranged on the electrified wire in automobile nearby and exported and electric current pair to be measured in the electrified wire
The voltage measurement signal answered；
Temperature-sensing element, it is arranged near the hall sensor and output temperature measurement signal；
The signal processing unit being connected with the hall sensor and temperature-sensing element, it is treated to calculate as follows
Survey the correction value Im of electric current：
If temperature belongs within preset range, the correction value Im of electric current to be measured is calculated according to following formula：
Here, α0、α1、α2、α3、α4And α5For constant, UHAnd UtRespectively described voltage measurement signal and temperature measurement signal,
Otherwise, then the correction value of the electric current to be measured is calculated using neural network model,
Wherein, the hall sensor is integrated with the signal processing unit,
Wherein, the hall sensor fits together with temperature-sensing element,
Wherein, the neural network model is BP neural network, comprising：Input layer, it includes two input node u1And u2, point
Column signal Shu Ru not descended：
u1=k1×UH×Ut
u2=k2×UH-Ut
UHAnd UtRespectively described voltage measurement signal and temperature measurement signal, k1And k2For normaliztion constant；
Hidden layer, the quantity of its node is 4 to 16；
Output layer, it includes an input node y, exports the correction value of the electric current to be measured.
2. Hall sensor as claimed in claim 1, wherein, the activation primitive of the hidden layer and output layer uses following shape
Formula：
Here, δ spans is between 0.2-0.5.
3. Hall sensor as claimed in claim 1, wherein the constant α0、α1、α2、α3、α4And α5By solving following side
Journey is determined：
Here, l=m × n, m are the quantity of temperature sampling point, and n is the quantity of current sample point, UHkFor the voltage of Hall sensor
K-th of sampled value of measurement signal, UtkFor k-th of sampled value of the temperature measurement signal near Hall sensor.
4. the Hall sensor temperature compensation as described in any one in claim 1-3, wherein, the scope of temperature-compensating
In the range of -40 DEG C to+125 DEG C, and the preset range is between -10 DEG C to+50 DEG C.
5. a kind of electronic control system for hybrid vehicle, it is characterised in that including：
Electronic controller；
The AC-DC inverter being connected with the motor and battery pack of hybrid vehicle, its control in the electronic controller
Under system, alternating current is converted into direct current and charged to the battery pack；
The DC-DC converter being connected with the AC-DC inverter and the battery pack, it is in the electronic controller
Control under, by high voltage direct current be converted to low-voltage DC and to the battery pack charge；
Hall sensing in the sensor group communicated with electronic controller, including multiple 1-4 such as claim as described in any one
Device, the Hall sensor is arranged on the defeated of the motor, AC-DC inverter, DC-DC converter and battery pack
Go out near circuit to measure the electric current of current through line.
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| CN201210211754.2A CN103513097B (en) | 2012-06-26 | 2012-06-26 | Hall sensor temperature compensation and Hall sensor for automobile |
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| CN201210211754.2A CN103513097B (en) | 2012-06-26 | 2012-06-26 | Hall sensor temperature compensation and Hall sensor for automobile |
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Families Citing this family (8)
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| CN103869151B (en) * | 2014-03-24 | 2017-06-13 | 国家电网公司 | A kind of sampling resistor real-time deviation correcting compensation method based on infrared principles |
| CN106980041A (en) * | 2017-03-31 | 2017-07-25 | 四川长虹电器股份有限公司 | A kind of current acquisition method of battery management system |
| DE102017206883A1 (en) * | 2017-04-25 | 2018-10-25 | Robert Bosch Gmbh | Method for adapting a position sensor for positioning an air system actuator of an internal combustion engine |
| CN110203104A (en) * | 2019-05-17 | 2019-09-06 | 暨南大学 | A kind of battery-operated type electric flat carriage intelligent monitor system and method |
| CN112345810A (en) * | 2019-08-06 | 2021-02-09 | 天津光电通信技术有限公司 | Current measuring device based on Hall sensor and measuring method thereof |
| CN112147403A (en) * | 2020-09-16 | 2020-12-29 | 国创新能源汽车智慧能源装备创新中心(江苏)有限公司 | Method and system for improving temperature adaptability of residual current detection device |
| CN112834816A (en) * | 2021-01-06 | 2021-05-25 | 南京能晶电子科技有限公司 | Hall sensor chip temperature compensation method for automobile |
| CN114111846B (en) * | 2022-01-26 | 2022-04-08 | 南京中旭电子科技有限公司 | Compensation method and device suitable for Hall sensor and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1194614A (en) * | 1996-05-24 | 1998-09-30 | 日野自动车工业株式会社 | Controller for on-vehicle battery |
| CN1707280A (en) * | 2004-06-11 | 2005-12-14 | 日产自动车株式会社 | Battery state of charge detection |
| CN103185832A (en) * | 2011-12-31 | 2013-07-03 | 上海汽车集团股份有限公司 | Hall sensor temperature compensation method in automobile and relevant hall sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5011940B2 (en) * | 2006-10-16 | 2012-08-29 | トヨタ自動車株式会社 | Power supply device and vehicle |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194614A (en) * | 1996-05-24 | 1998-09-30 | 日野自动车工业株式会社 | Controller for on-vehicle battery |
| CN1707280A (en) * | 2004-06-11 | 2005-12-14 | 日产自动车株式会社 | Battery state of charge detection |
| CN103185832A (en) * | 2011-12-31 | 2013-07-03 | 上海汽车集团股份有限公司 | Hall sensor temperature compensation method in automobile and relevant hall sensor |
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