CN108982944A - A kind of current measuring method of strap, device, equipment and storage medium - Google Patents
A kind of current measuring method of strap, device, equipment and storage medium Download PDFInfo
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- CN108982944A CN108982944A CN201811002342.1A CN201811002342A CN108982944A CN 108982944 A CN108982944 A CN 108982944A CN 201811002342 A CN201811002342 A CN 201811002342A CN 108982944 A CN108982944 A CN 108982944A
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- strap
- quantity sensor
- uniaxial magnetic
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- magnetic quantity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a kind of current measuring methods of strap, only need to obtain the relative distance between the magnetic induction intensity and each uniaxial magnetic quantity sensor that strap to be measured generates on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors, so that it may calculate the current value of strap to be measured.For each uniaxial magnetic quantity sensor, as long as guaranteeing that the line of any two uniaxial magnetic quantity sensor is vertical with plane where strap to be measured, plane is located at the central axes of strap to be measured with the intersection of plane where strap to be measured where line and the magnetic susceptibility direction of uniaxial magnetic quantity sensor parallel and each with the current direction of strap to be measured is each perpendicular to current direction and line.The measurement that electric current can be realized in the case where avoiding the relative position of fixed primary circuit conducting wire and each uniaxial magnetic quantity sensor, reduces installation difficulty.In addition, the invention also discloses a kind of current measuring device of strap, equipment and storage medium, effect is as above.
Description
Technical field
The present invention relates to fields of measurement, in particular to a kind of current measuring method of strap, device, equipment and storage
Medium.
Background technique
The case equipments such as power distribution cabinet, ring network cabinet, switchgear are widely used in the power system, general in these case equipments
All over using flat copper bar as conductive conductor, the electric current on these copper bars be have to measure in electric system it is important
One of parameter can reflect the operating status of electric system, be that the functions such as electric power system optimization operation, control and protection must not
The input variable that can lack.Therefore, precision and response speed that the electric current in copper bar conductor is very important, and measures are measured
The requirement of electric system different function should be met.
It is traditional using in current transformer and Hall current sensor measurement electric system when the electric current of strap,
It need to seal in primary circuit, and volume is big, installation is inconvenient.In recent years, with the development of magnetic sensor technologies, anisotropy
The Magnetic Sensors such as magneto-resistor, giant magnetoresistance and tunnel magneto resistance are introduced into electric system, for measuring the electric current of strap,
Although not needing directly to contact with primary circuit using the current sensor that single Magnetic Sensor makes, iron core or magnetic are not needed
Core；But the relative position of primary circuit conducting wire and Magnetic Sensor must be fixed, that is to say, that the installation to single Magnetic Sensor
It is required that high, installation slightly deviation will have an impact measurement result.
It can be seen that how to overcome it is traditional using single Magnetic Sensor to the electric current of the strap in electric system into
When row measurement, asked since the low problem of installation difficulty measurement accuracy caused greatly is that those skilled in the art are urgently to be resolved
Topic.
Summary of the invention
The embodiment of the present application provides current measuring method, device, equipment and the storage medium of a kind of strap, with solution
It is certainly traditional when being measured using electric current of the single Magnetic Sensor to the strap in electric system in the prior art, due to
The low problem of installation difficulty measurement accuracy caused greatly.
In order to solve the above technical problems, the present invention provides a kind of current measuring methods of strap, comprising:
The magnetic induction intensity that strap to be measured generates on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors is obtained respectively
Relative distance between each uniaxial magnetic quantity sensor；
The current value of the strap to be measured is calculated according to each magnetic induction intensity and each relative distance；
Wherein, the line of any two uniaxial magnetic quantity sensor is vertical with plane where the strap to be measured, the company
The intersection of plane is located at the central axes of the strap to be measured where plane where line and the strap to be measured, described
The magnetic susceptibility side of the plane uniaxial magnetic quantity sensor parallel and each with the current direction of the strap to be measured where line
To being each perpendicular to the current direction and the line.
Preferably, the number of the uniaxial magnetic quantity sensor is two, respectively the first uniaxial magnetic quantity sensor and the second single shaft
Magnetic Sensor.
Preferably, described to obtain what strap to be measured generated on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors respectively
Magnetic induction intensity specifically includes:
Measure in advance first uniaxial magnetic quantity sensor the first proportionality coefficient and second uniaxial magnetic quantity sensor
Two proportionality coefficients；
Apply DC voltage for first uniaxial magnetic quantity sensor and second uniaxial magnetic quantity sensor to obtain described the
The first voltage of one uniaxial magnetic quantity sensor output and the second voltage of second uniaxial magnetic quantity sensor output；
Using the product of first proportionality coefficient and the first voltage as the first of first uniaxial magnetic quantity sensor
Magnetic induction intensity, using the product of second proportionality coefficient and the second voltage as the of second uniaxial magnetic quantity sensor
Two magnetic induction intensity.
Preferably, the relative distance for obtaining each uniaxial magnetic quantity sensor specifically:
The phase between first uniaxial magnetic quantity sensor and second uniaxial magnetic quantity sensor is obtained by range sensor
It adjusts the distance.
Preferably, described to calculate the strap to be measured according to each magnetic induction intensity and each relative distance
Current value specifically includes:
According to the first magnetic induction intensity of first uniaxial magnetic quantity sensor, the second magnetic of second uniaxial magnetic quantity sensor
Induction and the distance between first uniaxial magnetic quantity sensor and second uniaxial magnetic quantity sensor calculate it is described to
Survey the first electric current and the second electric current of strap；
Processing is iterated to first electric current and second electric current；
The absolute difference of the first electric current and the second electric current after calculating iterative processing；
It chooses the absolute difference for being less than preceding an iteration and is less than the target difference of the absolute difference of rear an iteration
Absolute value；
Will first object electric current corresponding with the target difference absolute value or the second target current as described to be measured flat
The current value of flush conductor.
In order to solve the above technical problems, the present invention also provides a kind of corresponding with the current measuring method of strap flat
The current measuring device of flush conductor, comprising:
Module is obtained, is generated on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors for obtaining strap to be measured respectively
Magnetic induction intensity and each uniaxial magnetic quantity sensor between relative distance；
Computing module, for calculating the strap to be measured according to each magnetic induction intensity and each relative distance
Current value；
Wherein, the line of any two uniaxial magnetic quantity sensor is vertical with plane where the strap to be measured, the company
The intersection of plane is located at the central axes of the strap to be measured where plane where line and the strap to be measured, described
The magnetic susceptibility side of the plane uniaxial magnetic quantity sensor parallel and each with the current direction of the strap to be measured where line
To being each perpendicular to the current direction and the line.
Preferably, the number of the uniaxial magnetic quantity sensor is two, respectively the first uniaxial magnetic quantity sensor and the second single shaft
Magnetic Sensor.
Preferably, the acquisition module is specifically used for obtaining first uniaxial magnetic quantity sensor and institute by range sensor
State the relative distance between the second uniaxial magnetic quantity sensor.
In order to solve the above technical problems, the present invention also provides a kind of corresponding with the current measuring method of strap flat
The current measure device of flush conductor, comprising:
Memory, for storing computer program；
Processor, for executing the computer program to realize the current measuring method of any one of the above strap
The step of.
In order to solve the above technical problems, the present invention also provides a kind of meters corresponding with the current measuring method of strap
Calculation machine readable storage medium storing program for executing is stored with computer program on the computer readable storage medium, and the computer program is located
Manage the step of device executes the current measuring method to realize any one of the above strap.
Compared with the prior art, the current measuring method of a kind of strap provided by the present invention, it is only necessary to obtain to
Survey the magnetic induction intensity that is generated on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors of strap and each uniaxial magnetic quantity sensor it
Between relative distance, so that it may calculate the current value of strap to be measured, realize the measurement to strap electric current to be measured.Together
When, for each uniaxial magnetic quantity sensor, as long as flat where guaranteeing the line and strap to be measured of any two uniaxial magnetic quantity sensor
Face is vertical, the intersection of plane where plane where line and strap to be measured be located at the central axes of strap to be measured and with
The current direction of strap to be measured is parallel and the magnetic susceptibility direction of each uniaxial magnetic quantity sensor is each perpendicular to current direction and company
Line.During installation, the relative position without fixed primary circuit conducting wire and each uniaxial magnetic quantity sensor, so using this measurement
Method can be realized in the case where avoiding the relative position of fixed primary circuit conducting wire and each uniaxial magnetic quantity sensor to be measured flat
The current measurement of flush conductor, and then installation difficulty is reduced, improve measurement accuracy.In addition, the present invention also provides one kind
Current measuring device, equipment and the storage medium of strap, effect are as above.
Detailed description of the invention
Fig. 1 is a kind of current measuring method flow chart of strap provided by the embodiment of the present invention；
Fig. 2 is a kind of strap current measurement schematic diagram provided by the embodiment of the present invention；
Fig. 3 is the relation schematic diagram of current differential absolute value and the number of iterations provided by the embodiment of the present invention；
Fig. 4 is a kind of current measuring device composition schematic diagram of strap provided by the embodiment of the present invention；
Fig. 5 is a kind of current measure device composition schematic diagram of strap provided by the embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
Its embodiment, shall fall within the protection scope of the present invention.
Core of the invention is to provide current measuring method, device, equipment and the storage medium of a kind of strap, can be with
Solve it is traditional when being measured using electric current of the single Magnetic Sensor to the strap in electric system, due to installation difficulty
The low problem of measurement accuracy caused by big.
Scheme in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
The present invention is described in further detail for formula.
Fig. 1 is a kind of current measuring method flow chart of strap provided by the embodiment of the present invention, as shown in Figure 1,
The measurement method includes:
S101: the magnetic induction that strap to be measured generates on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors is obtained respectively
Relative distance between intensity and each uniaxial magnetic quantity sensor.
Specifically, in practical applications, uniaxial magnetic quantity sensor can be multiple, and strap to be measured is in each uniaxial magnetic
Magnetic induction intensity can be generated on the magnetic susceptibility direction of sensor；Relative distance between each uniaxial magnetic quantity sensor is exactly any two
Relative distance between a uniaxial magnetic quantity sensor, the multiple magnetic induction intensity obtained in the step and multiple relative distances are meters
Calculate the foundation of strap current value to be measured.
In addition, it is worth noting that, when obtaining each magnetic induction intensity and relative distance, without sensing each uniaxial magnetic
Device accesses primary circuit, as long as guaranteeing that the line of any two uniaxial magnetic quantity sensor is vertical with plane where strap to be measured,
The intersection of plane where line and strap to be measured place plane be located at the central axes of strap to be measured and with it is to be measured flat
The current direction of flush conductor is parallel and the magnetic susceptibility direction of each uniaxial magnetic quantity sensor is each perpendicular to current direction and line,
The contactless installation of each uniaxial magnetic sensing is realized, as long as measuring in specific calculate opposite between each uniaxial magnetic quantity sensor
Distance, without the relative position of fixed primary circuit conducting wire and each uniaxial magnetic quantity sensor, installation is more convenient, and then measures
Accuracy is higher.
S102: the current value of strap to be measured is calculated according to each magnetic induction intensity and each relative distance.
After getting each magnetic induction intensity and each relative distance, just it is with each relative distance and each magnetic induction intensity
According to the current value for calculating strap to be measured.It in practical applications, can be with the magnetic induction of any two uniaxial magnetic quantity sensor
Intensity and relative distance calculate multiple current values of strap to be measured, then again to calculated multiple current values at
Reason, for example, average value or weighted average of multiple current values etc. are asked, finally using average value or weighted average as to be measured flat
The final current value of flush conductor, after calculating multiple current values, specifically how to handle can determines according to actual conditions, this hair
It is bright and be not construed as limiting.In practical applications, strap to be measured can be regular figure, be also possible to irregular figure.
The current measuring method of a kind of strap provided by the present invention, it is only necessary to obtain strap to be measured multiple
The relative distance between magnetic induction intensity and each uniaxial magnetic quantity sensor generated on the magnetic susceptibility direction of uniaxial magnetic quantity sensor, so that it may
The current value of strap to be measured is calculated, realizes the measurement to strap electric current to be measured.Meanwhile each uniaxial magnetic is sensed
Device, as long as guaranteeing that the line of any two uniaxial magnetic quantity sensor is vertical with plane where strap to be measured, plane where line
It is located at the electric current at the central axes of strap to be measured and with strap to be measured with the intersection of plane where strap to be measured
Direction is parallel and the magnetic susceptibility direction of each uniaxial magnetic quantity sensor is each perpendicular to current direction and line.During installation, nothing
The relative position of primary circuit conducting wire Yu each uniaxial magnetic quantity sensor need to be fixed, so can avoid admittedly using this measurement method
Determine to realize the current measurement to strap to be measured in the case where the relative position of primary circuit conducting wire and each uniaxial magnetic quantity sensor,
And then installation difficulty is reduced, improve measurement accuracy.
Preferably implement on the basis of the above embodiments to improve computational efficiency and reduce hardware cost
Mode, the number of uniaxial magnetic quantity sensor are two, respectively the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor.Specifically
Ground, exactly selects two uniaxial magnetic quantity sensors to realize the measurement to the current value of strap to be measured, and specific measurement process will
It describes in greater detail below, details are not described herein.
In order to further increase the accuracy of measurement result, on the basis of the above embodiments, preferably embodiment party
Formula obtains the magnetic induction intensity that strap to be measured generates on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors respectively and specifically wraps
It includes:
The first proportionality coefficient of the first uniaxial magnetic quantity sensor and the second ratio system of the second uniaxial magnetic quantity sensor are measured in advance
Number；
Apply DC voltage for the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor to obtain the first uniaxial magnetic sensing
The first voltage of device output and the second voltage of the second uniaxial magnetic quantity sensor output；
It, will using the product of the first proportionality coefficient and first voltage as the first magnetic induction intensity of the first uniaxial magnetic quantity sensor
Second magnetic induction intensity of the product of second proportionality coefficient and second voltage as the second uniaxial magnetic quantity sensor.
Specifically, be exactly before the magnetic induction intensity for obtaining the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor,
The first proportionality coefficient of the first uniaxial magnetic quantity sensor and the second proportionality coefficient of the second uniaxial magnetic quantity sensor are measured in advance；It can mention
The accuracy of the first proportionality coefficient and the second proportionality coefficient is risen, therefore the first proportionality coefficient and first voltage is combined to determine first
First magnetic induction intensity of uniaxial magnetic quantity sensor, the second uniaxial magnetic sensing determined in conjunction with the second proportionality coefficient and second voltage
Second magnetic induction intensity of device is more accurate, so being more advantageous to obtain more accurate measurement result.In addition, it is necessary to pay attention to
It is, in order to obtain more accurate measurement result that should ensure that apply the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor
DC voltage has certain stability.
In order to make that the measurement method of the embodiment of the present application is more intelligent and flexibility and further increase measurement result
Accuracy, on the basis of the above embodiments, preferably embodiment, obtains the relative distance of each uniaxial magnetic quantity sensor
Specifically:
The distance between the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor are obtained by range sensor.
In the present embodiment, it directly goes to obtain the first uniaxial magnetic quantity sensor using range sensor and the second uniaxial magnetic senses
Relative distance between device, compared to the phase between the first uniaxial magnetic quantity sensor of user's manual measurement and the second uniaxial magnetic quantity sensor
For adjusting the distance, measurement accuracy is higher；Compared to presetting a distance value, in strap current measurement to be measured,
The relative distance between the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor is kept to be necessary for for preset distance value, spirit
Activity is higher.Certainly, it selects opposite between range sensor the first uniaxial magnetic quantity sensor of measurement and the second uniaxial magnetic quantity sensor
Distance is a kind of preferably mode, does not represent and only has a kind of this mode that can also survey in practical applications by ruler etc.
Which kind of device measurement first is relative distance between one uniaxial magnetic quantity sensor of flow control and the second uniaxial magnetic quantity sensor specifically select single
Relative distance between axial magnetic sensor and the second uniaxial magnetic quantity sensor, the present invention are simultaneously not construed as limiting.
It is on the basis of the above embodiments, preferably real in order to further increase the accuracy of current measurement result
Mode is applied, the current value for calculating strap to be measured according to each magnetic induction intensity and each relative distance specifically includes:
According to the first magnetic induction intensity of the first uniaxial magnetic quantity sensor, the second magnetic induction intensity of the second uniaxial magnetic quantity sensor
And the first relative distance between uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor calculates the first of strap to be measured
Electric current and the second electric current；
Processing is iterated to the first electric current and the second electric current；
The absolute difference of the first electric current and the second electric current after calculating iterative processing；
It chooses the absolute difference for being less than preceding an iteration and is less than the target difference of the absolute difference of rear an iteration
Absolute value；
Using first object electric current corresponding with target difference absolute value or the second target current as strap to be measured
Current value.
Particularly as being to obtain the two of strap to be measured using the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor
A current value (the first electric current and the second electric current) can be to the first electric current and in order to improve the accuracy of current measurement result
Two electric currents are iterated processing, that is, change the relative distance of the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor, determine
First object electric current and the second target current, finally using first object electric current or the second target current as strap to be measured
Final current value.
In order to make those skilled in the art better understand technical solution provided by the invention, with reference to the accompanying drawing, with
For two uniaxial magnetic quantity sensors, the measurement process of the current value of strap to be measured in the present invention is described in detail.Fig. 2
For a kind of strap current measurement schematic diagram provided by the embodiment of the present invention.As shown in Fig. 2, 20 in Fig. 2 indicate first
Uniaxial magnetic quantity sensor, 21 indicate the second uniaxial magnetic quantity sensor, and the first uniaxial magnetic quantity sensor 20 and the second uniaxial magnetic quantity sensor 21 exist
It is arranged in space along straight line；The straight line perpendicular to plane where tested strap, plane where the straight line with it is to be measured flat
The intersection of 22 place plane of flush conductor is located at the central axes of strap 22 to be measured and the electric current side with strap 22 to be measured
To parallel, the magnetic susceptibility direction of the first uniaxial magnetic quantity sensor 20 and the second uniaxial magnetic quantity sensor 21 is both perpendicular to being tested flat lead
The straight line that the current direction of body and the first uniaxial magnetic quantity sensor 20 and the second uniaxial magnetic quantity sensor 21 are constituted.y1For the first uniaxial magnetic
Sensor 20 is at a distance from strap 22 to be measured, y2It is the second uniaxial magnetic quantity sensor 21 at a distance from strap 22 to be measured, d
For the distance between the first uniaxial magnetic quantity sensor 20 and the second Magnetic Sensor 21, a is the width of strap 22 to be measured, θ the
The friendship of the central axes X-axis and strap 22 to be measured where position and strap to be measured 22 where one uniaxial magnetic quantity sensor 20
Angle between point K.Relative position in specific installation, without fixed primary circuit conducting wire and the first uniaxial magnetic quantity sensor 20
With the relative position of primary circuit conducting wire and the second uniaxial magnetic quantity sensor 21, installation is simple, when actual measurement calculates, utilizes the
Relative distance between one uniaxial magnetic quantity sensor 20 and the second uniaxial magnetic quantity sensor 21, corresponding magnetic induction intensity and to be measured flat
The size of flush conductor 22 can calculate the current value of strap 22 to be measured.
The electric current calculation formula of strap 22 to be measured is derived first, strap 22 to be measured is divided into infinitely
A width is the elongate strip of dx, then the electric current of each elongate strip is dI=Idx/a, then the axial plane in strap 22 to be measured
The electric current in elongate strip at (plane where 21 line of the first uniaxial magnetic quantity sensor 20 and the second uniaxial magnetic quantity sensor) x is
The size for the magnetic induction intensity that one uniaxial magnetic quantity sensor position generates are as follows:
By symmetry it is found that ∑ dBy=0, thus, it is only required to solve the magnetic induction intensity of x-axis direction:
Therefore, the magnetic induction intensity at the first uniaxial magnetic quantity sensor 20 are as follows:
The magnetic induction intensity at the second uniaxial magnetic quantity sensor 21, which can similarly be obtained, is
Secondly, calculating the current value of strap 22 to be measured, it is assumed that first uniaxial magnetic quantity sensor 20 flat is led to be measured
Less than second uniaxial magnetic quantity sensor 21 of the distance of body 22 arrives the distance of strap 22 to be measured, then has:
y2-y1=d (5)
Wherein, I is the electric current of strap to be measured to be solved, is unknown quantity；B1、B2Respectively the first uniaxial magnetic sensing
The magnetic induction intensity that device 20 and the second uniaxial magnetic quantity sensor 21 measure, is known quantity；y1For the first uniaxial magnetic quantity sensor to
The distance for surveying strap 22, is unknown quantity；y2The distance that strap 22 to be measured is arrived for the second uniaxial magnetic quantity sensor 21, is not
The amount of knowing；A is the width of strap 22 to be measured, is known quantity；D is the first uniaxial magnetic quantity sensor 20 and the second uniaxial magnetic quantity sensor
The distance between 21, it is known quantity；μ0It is known constant for space permeability；π is pi, is known constant.
Joint type (3)~formula (5) can acquire tested electric current I.Solution procedure is as follows:
Step 1: y is enabled1=0；
Step 2: y is calculated according to formula (5)2；
In practical applications, y can also be enabled1For other values, it is of course also possible to enable y2, y is calculated further according to formula (5)1, specifically
How to realize to be determined according to the actual situation, and the present invention is simultaneously not construed as limiting.
Step 3: tested electric current is calculated according to formula (3), uses I1It indicates；
Step 4: tested electric current is calculated according to formula (4), uses I2It indicates；
Step 5: I is calculated1With I2Absolute difference, with Δ I=| I1-I2| it indicates, if meeting formula (6), solves
Process terminates, if being unsatisfactory for formula (6), continues iteration.
Δ I (n) < Δ I (n-1) and Δ I (n) < Δ I (n+1) (6)
In formula (6), n minimum 2, Δ I (n-1), Δ I (n), Δ I (n+1) are respectively (n-1), n, (n+1) secondary iteration
The I being calculated1With I2Absolute difference.If being unsatisfactory for formula (6), y is enabled1(n+1)=y1(n)+Δy1(y1(n+1) it is
The y of (n+1)th iteration1Value, y1It (n) is the y of nth iteration1Value, Δ y1For the y of preset each iteration1Increment), so
It is continued to execute afterwards back to step 2, until solution procedure terminates.Finally, corresponding first mesh of Δ I (n) in formula (6) will be met
Mark electric current I1(n) or the second target current I2(n) the final current value I as strap 22 to be measured.I1It (n) is nth iteration
The I being calculated1, I2(n) I being calculated for nth iteration2, the solution I of as tested electric current.
When the number of uniaxial magnetic quantity sensor is more than 2, the electric current calculating process and the above process of strap 22 to be measured
It is similar, only, need to calculate multiple groups first object electric current and the second target electricity at this time using any two uniaxial magnetic quantity sensor
Stream, the first electric current and the second electric current in every group can be used iterative processing above and obtain corresponding first object electric current and the
Two target currents, details are not described herein for detailed process, finally again to the first object electric current and the second target current in this multiple groups
Handled (be averaging or be weighted and averaged etc.), by the first object electric current and the second target electricity after last average or weighted average
Flow the final current value as strap 22 to be measured.For example, there are three uniaxial magnetic quantity sensor, respectively uniaxial magnetic quantity sensor A,
Uniaxial magnetic quantity sensor B, uniaxial magnetic quantity sensor C find out first group first with uniaxial magnetic quantity sensor A and uniaxial magnetic quantity sensor B
One electric current and the second electric current recycle uniaxial magnetic quantity sensor A and uniaxial magnetic quantity sensor C to find out second group of first electric current and the second electricity
Stream, finally finds out the first electric current of third group and the second electric current using uniaxial magnetic quantity sensor B and uniaxial magnetic quantity sensor C, then to three groups
In the first electric current and the second electric current handled, obtain the first object electric current and the second target current in corresponding three groups,
Then the average value or weighted average of first object electric current or the second target current in three groups are sought again, by final first object
The final current value of the corresponding average value of electric current or weighted average as strap 22 to be measured, or final the second target electricity
Flow the final current value of corresponding average value or weighted average as strap 22 to be measured.
In the following, being illustrated with concrete application scene to scheme provided by the present invention.
It is assumed that the width 200mm of strap 22 to be measured, thickness 1mm, the first uniaxial magnetic quantity sensor 20 and the second uniaxial magnetic
Sensor 21 is installed as shown in Figure 2, and the first uniaxial magnetic quantity sensor 20 is y at a distance from strap to be measured1=20mm, second is single
Axial magnetic sensor 21 is y at a distance from strap to be measured2=30mm, electric current is 100A in strap to be measured, then the application
The magnetic induction intensity of 20 position of the first uniaxial magnetic quantity sensor is obtained using 16.0 software emulation of Ansys Maxwell in embodiment
B1=2.7470244500496890 × 10-4, the magnetic induction density B of 21 position of the second uniaxial magnetic quantity sensor2=
2.5589329431267182×10-4.Preset the y of each iteration1Increment Delta y1For 0.1mm, and the first uniaxial magnetic quantity sensor
20 and second the distance between uniaxial magnetic quantity sensor 21 be 10mm, then through the invention provided by scheme obtain it is to be measured flat
The iteration result of the current value of conductor 22 is as shown in table 1.
Table 1
Fig. 3 is the relation schematic diagram of current differential absolute value and the number of iterations provided by the embodiment of the present invention, such as Fig. 3 and
Shown in table 1.As the number of iterations n=200, it is 0.0001017 that current differential absolute value delta I, which reaches minimum value, in practical application
In, Δ I=0.000102 can be selected, therefore take I1=99.93813A or I2=99.93824A is the electric current for surveying strap
Measured value, then measurement error (takes I for 0.06187%1=99.93813A is measurement result) or 0.06176% (take I2=
99.93824A being measurement result).
It is described in detail above for a kind of embodiment of the current measuring method of strap, is based on above-mentioned reality
The current measuring method for applying the strap of example description corresponding with this method flat is led the embodiment of the invention also provides a kind of
The current measuring device of body.Since the embodiment of device part is corresponded to each other with the embodiment of method part, device part
Embodiment please refer to method part embodiment description, which is not described herein again.
Fig. 4 is a kind of current measuring device composition schematic diagram of strap provided by the embodiment of the present invention, such as Fig. 4 institute
Show, which includes obtaining module 401 and computing module 402.
Module 401 is obtained, for obtaining strap to be measured respectively in the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors
Relative position between the magnetic induction intensity of generation and each uniaxial magnetic quantity sensor；
Computing module 402, for calculating the current value of strap to be measured according to each magnetic induction intensity and each relative position；
Wherein, the line of any two uniaxial magnetic quantity sensor is vertical with plane where strap to be measured, flat where line
The intersection of plane where face and strap to be measured is located at the central axes of strap to be measured and the electricity with strap to be measured
Stream direction is parallel and the magnetic susceptibility direction of each uniaxial magnetic quantity sensor is each perpendicular to current direction and line.
The current measuring device of a kind of strap provided by the present invention, it is only necessary to obtain strap to be measured multiple
The relative distance between magnetic induction intensity and each uniaxial magnetic quantity sensor generated on the magnetic susceptibility direction of uniaxial magnetic quantity sensor, so that it may
The current value of strap to be measured is calculated, realizes the measurement to strap electric current to be measured.Meanwhile each uniaxial magnetic is sensed
Device, as long as guaranteeing that the line of any two uniaxial magnetic quantity sensor is vertical with plane where strap to be measured, plane where line
It is located at the electric current at the central axes of strap to be measured and with strap to be measured with the intersection of plane where strap to be measured
Direction is parallel and the magnetic susceptibility direction of each uniaxial magnetic quantity sensor is each perpendicular to current direction and line.During installation, nothing
The relative position of primary circuit conducting wire Yu each uniaxial magnetic quantity sensor need to be fixed, so can avoid admittedly using this measuring device
Determine to realize the current measurement to strap to be measured in the case where the relative position of primary circuit conducting wire and each uniaxial magnetic quantity sensor,
And then installation difficulty is reduced, improve measurement accuracy.
On the basis of the above embodiments, preferably embodiment, the number of uniaxial magnetic quantity sensor are two, respectively
For the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor.
On the basis of the above embodiments, preferably embodiment, acquisition module are specifically used for passing through Distance-sensing
Device obtains the distance between the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor.
It is described in detail above for a kind of embodiment of the current measuring method of strap, is based on above-mentioned reality
The current measuring method for applying the strap of example description corresponding with this method flat is led the embodiment of the invention also provides a kind of
The current measure device of body.Since the embodiment of environment division is corresponded to each other with the embodiment of method part, environment division
Embodiment please refer to method part embodiment description, which is not described herein again.
Fig. 5 is a kind of current measure device composition schematic diagram of strap provided by the embodiment of the present invention, such as Fig. 5 institute
Show, which includes memory 501 and processor 502.
Memory 501, for storing computer program；
Processor 502 realizes strap provided by any one above-mentioned embodiment for executing computer program
Current measuring method the step of.
A kind of current measure device of strap provided by the present invention is led without fixed primary circuit during installation
The relative position of line and each uniaxial magnetic quantity sensor, so using this measuring device, can avoid fixed primary circuit conducting wire with
The current measurement to strap to be measured is realized in the case where the relative position of each uniaxial magnetic quantity sensor, and then it is difficult to reduce installation
Degree, improves measurement accuracy.
It is described in detail above for a kind of embodiment of the current measuring method of strap, is based on above-mentioned reality
The current measuring method for applying the strap of example description, the embodiment of the invention also provides a kind of computers corresponding with this method
Readable storage medium storing program for executing.Since the embodiment of computer readable storage medium part is corresponded to each other with the embodiment of method part, because
The embodiment of this computer readable storage medium part please refers to the embodiment description of method part, and which is not described herein again.
A kind of computer readable storage medium is stored with computer program, computer journey on computer readable storage medium
The step of current measuring method that sequence is executed by processor to realize the strap of above-mentioned any one embodiment offer.
A kind of computer readable storage medium provided by the present invention, processor can read in readable storage medium storing program for executing and store
Program, it can realize that the current measuring method for the strap that above-mentioned any one embodiment provides is not necessarily to during installation
The relative position of fixed primary circuit conducting wire and each uniaxial magnetic quantity sensor, it is possible to avoid fixed primary circuit conducting wire with respectively
The current measurement to strap to be measured is realized in the case where the relative position of uniaxial magnetic quantity sensor, and then it is difficult to reduce installation
Degree, improves measurement accuracy.
Above to a kind of current measuring method of strap provided by the present invention, device, equipment and storage medium into
It has gone and has been discussed in detail.With several examples, principle and implementation of the present invention are described herein, above embodiments
Explanation, be merely used to help understand method and its core concept of the invention；Meanwhile for the general technology people of this field
Member, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this explanation
Book content should not be construed as limiting the invention, those skilled in the art, under the premise of no creative work, to this hair
Bright made modification, equivalent replacement, improvement etc., should be included in the application.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One operation is distinguished with another operation, without necessarily requiring or implying there are any between these entities or operation
This actual relationship or sequence.Moreover, the similar word such as term " includes ", so that including the unit of a series of elements, equipment
Or system not only includes those elements, but also including other elements that are not explicitly listed, or further includes for this list
Member, equipment or the intrinsic element of system.
Claims (10)
1. a kind of current measuring method of strap characterized by comprising
Magnetic induction intensity that strap to be measured generates on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors and each is obtained respectively
Relative distance between the uniaxial magnetic quantity sensor；
The current value of the strap to be measured is calculated according to each magnetic induction intensity and each relative distance；
Wherein, the line of any two uniaxial magnetic quantity sensor is vertical with plane where the strap to be measured, the line institute
At the central axes that the intersection of plane and plane where the strap to be measured is located at the strap to be measured and with it is described
The current direction of strap to be measured is parallel and the magnetic susceptibility direction of each uniaxial magnetic quantity sensor is each perpendicular to the electric current
Direction and the line.
2. the current measuring method of strap according to claim 1, which is characterized in that the uniaxial magnetic quantity sensor
Number is two, respectively the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor.
3. the current measuring method of strap according to claim 2, which is characterized in that it is described obtain respectively it is to be measured flat
The magnetic induction intensity that flush conductor generates on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors specifically includes:
The first proportionality coefficient of first uniaxial magnetic quantity sensor and the second ratio of second uniaxial magnetic quantity sensor are measured in advance
Example coefficient；
It is single to obtain described first to apply DC voltage for first uniaxial magnetic quantity sensor and second uniaxial magnetic quantity sensor
The first voltage of axial magnetic sensor output and the second voltage of second uniaxial magnetic quantity sensor output；
Using the product of first proportionality coefficient and the first voltage as the first magnetic strength of first uniaxial magnetic quantity sensor
Intensity is answered, using the product of second proportionality coefficient and the second voltage as the second magnetic of second uniaxial magnetic quantity sensor
Induction.
4. the current measuring method of strap according to claim 2, which is characterized in that described to obtain each single shaft
The relative distance of Magnetic Sensor specifically:
By range sensor obtain between first uniaxial magnetic quantity sensor and second uniaxial magnetic quantity sensor it is opposite away from
From.
5. the current measuring method of strap according to claim 2, which is characterized in that described according to each magnetic strength
The current value for answering intensity and each relative distance to calculate the strap to be measured specifically includes:
Second magnetic induction of the first magnetic induction intensity, second uniaxial magnetic quantity sensor according to first uniaxial magnetic quantity sensor
Relative distance between intensity and first uniaxial magnetic quantity sensor and second uniaxial magnetic quantity sensor calculate it is described to
Survey the first electric current and the second electric current of strap；
Processing is iterated to first electric current and second electric current；
The absolute difference of the first electric current and the second electric current after calculating iterative processing；
It chooses the absolute difference for being less than preceding an iteration and the target difference for being less than the absolute difference of rear an iteration is absolute
Value；
First object electric current corresponding with the target difference absolute value or the second target current to be measured flat are led as described
The current value of body.
6. a kind of current measuring device of strap characterized by comprising
Obtain module, the magnetic generated on the magnetic susceptibility direction of multiple uniaxial magnetic quantity sensors for obtaining strap to be measured respectively
Relative distance between induction and each uniaxial magnetic quantity sensor；
Computing module, for calculating the electricity of the strap to be measured according to each magnetic induction intensity and each relative distance
Flow valuve；
Wherein, the line of any two uniaxial magnetic quantity sensor is vertical with plane where the strap to be measured, the line institute
It is located at the central axes of the strap to be measured in the intersection of plane where plane and the strap to be measured, the line
The magnetic susceptibility direction of the place plane uniaxial magnetic quantity sensor parallel and each with the current direction of the strap to be measured is equal
Perpendicular to the current direction and the line.
7. the current measuring device of strap according to claim 6, which is characterized in that the uniaxial magnetic quantity sensor
Number is two, respectively the first uniaxial magnetic quantity sensor and the second uniaxial magnetic quantity sensor.
8. the current measuring device of strap according to claim 7, which is characterized in that the acquisition module is specifically used
In obtaining the relative distance between first uniaxial magnetic quantity sensor and second uniaxial magnetic quantity sensor by range sensor.
9. a kind of current measure device of strap characterized by comprising
Memory, for storing computer program；
Processor, for executing the computer program to realize the strap as described in claim 1 to 5 any one
The step of current measuring method.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program, the computer program are executed by processor the electricity to realize the strap as described in claim 1 to 5 any one
The step of flow measuring method.
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| CN117647762A (en) * | 2024-01-30 | 2024-03-05 | 华中科技大学 | Method for measuring electromagnetic field space bit type distribution |
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