CN109613322A - The current measuring method and device of copper bar type conducting wire - Google Patents
The current measuring method and device of copper bar type conducting wire Download PDFInfo
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- CN109613322A CN109613322A CN201811457305.XA CN201811457305A CN109613322A CN 109613322 A CN109613322 A CN 109613322A CN 201811457305 A CN201811457305 A CN 201811457305A CN 109613322 A CN109613322 A CN 109613322A
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- conducting wire
- bar type
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Classifications
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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
- G01R15/205—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 magneto-resistance devices, e.g. field plates
-
- 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
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- 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
Abstract
The invention discloses the current measuring methods and device of copper bar type conducting wire, one of method includes: that at least one magnetic sensing unit is arranged close to the surface of copper bar type conducting wire to be measured, and at least one described magnetic sensing unit is located at the middle part of the long side of the copper bar type conducting wire longitudinal section shape to be measured, the longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；The magnetic susceptibility direction of the magnetic sensing unit is parallel with the extending direction of the long side；Obtain the output valve of at least one magnetic sensing unit；The electric current of the copper bar type conducting wire to be measured is obtained according to the output valve of at least one magnetic sensing unit.The current measuring method and device of copper bar type conducting wire provided by the embodiment of the present invention can relatively accurately export the measurement result of magnetic induction intensity when copper bar type conducting wire passes to electric current.
Description
Technical field
The present invention relates to current sensing techniques fields, and in particular to the current measuring method and device of copper bar type conducting wire.
Background technique
As shown in Figure 1A, it is rectangle or circle that copper bar type conducting wire, which is a kind of longitudinal cross-section (i.e. the section vertical with current direction),
The flat electrical connector of angular moment shape, the copper bar type conducting wire in the application are not limited to be also possible to other materials using copper material
Matter.The single flow area of copper bar type conducting wire is larger thus dynamic stability and thermal stability are all better than cable, therefore is widely used in
The electro-engineerings such as high and low voltage electrical equipment, switch contact, controller switching equipment, bus duct are also widely used in metal smelt, electrification plating, change
The super-large currents electrolysis for production engineering such as work caustic soda.In general, current capacity will use copper bar type when meeting or exceeding 250A
Conducting wire imports or derived current.
Existing current measuring device is often only applicable to the current measurement of circular cross-section (such as steel-cored aluminium strand), and due to copper
That there are shapes is special for row's type conducting wire, load current is larger, irregular (the position magnetic induction intensity having is special for induced magnetic field distribution
It is weak, it is difficult to observe) the characteristics of, traditional current measure device often can not accurately measure its electric current.
Summary of the invention
In view of this, the embodiment of the invention provides the current measuring method and device of copper bar type conducting wire, it is existing to solve
Method can not accurately measure the problem of electric current of copper bar type conducting wire.
According in a first aspect, the embodiment of the invention provides a kind of current measuring methods of copper bar type conducting wire, comprising: close to
The surface of copper bar type conducting wire to be measured is arranged at least one magnetic sensing unit, and at least one described magnetic sensing unit be located at it is described to
Survey the middle part of the long side of copper bar type conducting wire longitudinal section shape, the longitudinal section shape of the copper bar type conducting wire to be measured be rectangle or
Round rectangle；The magnetic susceptibility direction of the magnetic sensing unit is parallel with the extending direction of the long side；Obtain it is described at least one
The output valve of magnetic sensing unit；The copper bar type conducting wire to be measured is obtained according to the output valve of at least one magnetic sensing unit
Electric current.
Optionally, nearby at least one magnetic sensing unit is arranged in the surface close to copper bar type conducting wire to be measured, and at least
The step of middle part for the long side that one magnetic sensing unit is located at the copper bar type conducting wire longitudinal section shape to be measured include: close to
Survey the surface of copper bar type conducting wire and the position difference in the middle part of two long sides of the copper bar type conducting wire longitudinal section shape to be measured
This of first magnetic sensing unit, the second magnetic sensing unit, the first magnetic sensing unit and the second magnetic sensing unit are set
Susceptibility and magnetic susceptibility direction are all the same；Correspondingly, the output valve of at least one magnetic sensing unit according to obtains institute
The step of stating the electric current of copper bar type conducting wire to be measured includes: according to the first magnetic sensing unit and the second magnetic sensing unit
The difference of output valve obtains the electric current of the copper bar type conducting wire to be measured.
According to second aspect, the embodiment of the invention provides a kind of current measuring methods of copper bar type conducting wire, comprising: close to
The surface of copper bar type conducting wire to be measured and the position point in the middle part of two long sides of the copper bar type conducting wire longitudinal section shape to be measured
First magneto-resistor, the second magneto-resistor are not set, and the longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；
The magnetic susceptibility direction of first magneto-resistor and second magneto-resistor is parallel with the extending direction of the long side, and described
One magneto-resistor is identical with the magnetic susceptibility direction of second magneto-resistor；First magneto-resistor and second magneto-resistor series connection,
Both ends after series connection are separately connected both ends of power；Obtain the voltage value between first magneto-resistor and second magneto-resistor；
The electric current of the copper bar type conducting wire to be measured is obtained according to the voltage value between first magneto-resistor and second magneto-resistor.
According to the third aspect, the embodiment of the invention provides a kind of current measuring methods of copper bar type conducting wire, comprising: close to
The first magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor is arranged in the surface of copper bar type conducting wire to be measured, wherein described
First magneto-resistor, second magneto-resistor are located at the middle part of a long side of the copper bar type conducting wire longitudinal section shape to be measured,
The third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；It is described to be measured
The longitudinal section shape of copper bar type conducting wire is rectangle or round rectangle；First magneto-resistor, second magneto-resistor, described
Three magneto-resistors, the magnetic susceptibility direction of the 4th magneto-resistor are parallel with the extending direction of the long side, and first magnetoelectricity
Hinder, the magnetic susceptibility direction of the third magneto-resistor and fourth magneto-resistor contrary with the magnetic susceptibility of second magneto-resistor
On the contrary；First magneto-resistor and second magneto-resistor connect to form the first branch, and the both ends of the first branch connect electricity
Source both ends, the third magneto-resistor and the 4th magneto-resistor connect to form second branch, the both ends connection of the second branch
The both ends of power, wherein connecting the magnetosensitive of two magneto-resistors of same power end in the first branch and the second branch
It is identical to feel direction；The first voltage value between first magneto-resistor and second magneto-resistor is obtained, and obtains the third
Second voltage value between magneto-resistor and the 4th magneto-resistor；According to the difference of the first voltage value and the second voltage value
Value obtains the electric current of the copper bar type conducting wire to be measured.
Fourth aspect, the embodiment of the invention provides a kind of current measuring methods of copper bar type conducting wire, comprising: close to be measured
The first magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor is arranged in the surface of copper bar type conducting wire, wherein described first
Magneto-resistor, second magneto-resistor are located at the middle part of a long side of the copper bar type conducting wire longitudinal section shape to be measured, described
Third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；The copper bar to be measured
The longitudinal section shape of type conducting wire is rectangle or round rectangle；First magneto-resistor, second magneto-resistor, the third magnetic
Resistance, the magnetic susceptibility direction of the 4th magneto-resistor are all the same and parallel with the extending direction of the long side；First magnetoelectricity
Resistance and the third magneto-resistor connect to form the first branch, and the both ends of the first branch connect both ends of power, second magnetic
Resistance and the 4th magneto-resistor connect to form second branch, and the both ends of the second branch connect the both ends of power, wherein
The magnetic susceptibility that two magneto-resistors of same power end are connected in the first branch and the second branch is contrary；Obtain institute
The first voltage value between the first magneto-resistor and the third magneto-resistor is stated, and obtains second magneto-resistor and the 4th magnetic
Second voltage value between resistance；The copper bar to be measured is obtained according to the difference of the first voltage value and the second voltage value
The electric current of type conducting wire.
Optionally, method described in first aspect, second aspect, the third aspect or fourth aspect further include: make it is described to
It surveys copper bar type conducting wire and other copper bar type conducting wires being powered is arranged side by side along the direction of the long side.
Optionally, method described in first aspect, second aspect, the third aspect or fourth aspect further include: described in adjustment
The magnetic susceptibility position of the corresponding magnetic sensing unit of copper bar type conducting wire to be measured or magneto-resistor is located at the two of adjacent energization copper bar type conducting wire
On the line at a short side midpoint.
Optionally, method described in first aspect, second aspect, the third aspect or fourth aspect further include: will it is described to
Surveying the bending of copper bar type conducting wire is in " Z " font；The surface of " Z " the font sloping portion is used to that the magnetic sensing unit to be arranged, and
" Z " the font non-angled corresponds on the extending direction of the long side along arranged in a straight line.
According to the 5th aspect, the embodiment of the invention provides a kind of current measuring devices of copper bar type conducting wire, comprising: at least
One magnetic sensing unit is fixedly installed close to the surface of copper bar type conducting wire to be measured, and the magnetic sensing unit is positioned at described to be measured
The middle part of the long side of copper bar type conducting wire longitudinal section shape, the magnetic susceptibility direction of the magnetic sensing unit and the extension of the long side
Direction is parallel；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；Signal processing module, for obtaining
The output valve of at least one magnetic sensing unit is taken, and according to the acquisition of the output valve of at least one magnetic sensing unit
The electric current of copper bar type conducting wire to be measured.
Optionally, at least one described magnetic sensing unit includes at least: the first magnetic sensing unit and the second magnetic sensing unit,
It is arranged close to the surface of copper bar type conducting wire to be measured, and is located at the two long of the copper bar type conducting wire longitudinal section shape to be measured
The middle part on side, and the magnetic responsivity and magnetic susceptibility direction of the first magnetic sensing unit and the second magnetic sensing unit are homogeneous
Together；Correspondingly, the signal processing module is used for according to the defeated of the first magnetic sensing unit and the second magnetic sensing unit
The difference being worth out obtains the electric current of the copper bar type conducting wire to be measured.
According to the 6th aspect, the embodiment of the invention provides a kind of current measuring devices of copper bar type conducting wire, comprising: first
Magneto-resistor, the second magneto-resistor are arranged close to the surface of copper bar type conducting wire to be measured, and it is vertical to be located at the copper bar type conducting wire to be measured
To the middle part of two long sides of cross sectional shape；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；
The magnetic susceptibility direction of first magneto-resistor and second magneto-resistor is parallel with the extending direction of the long side, and described
One magneto-resistor is identical with the magnetic susceptibility direction of second magneto-resistor；First magneto-resistor and second magneto-resistor series connection,
Both ends after series connection are separately connected both ends of power；Signal processing module, input terminal are connected to first magneto-resistor and described
Between second magneto-resistor, for obtaining the voltage value between first magneto-resistor and second magneto-resistor, and according to described
Voltage value between first magneto-resistor and second magneto-resistor obtains the electric current of the copper bar type conducting wire to be measured.
According to the 7th aspect, the embodiment of the invention provides a kind of current measuring devices of copper bar type conducting wire, comprising: first
Magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are arranged, wherein institute close to the surface of copper bar type conducting wire to be measured
State the first magneto-resistor, second magneto-resistor is located in a long side of the copper bar type conducting wire longitudinal section shape to be measured
Portion, the third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；It is described to
The longitudinal section shape for surveying copper bar type conducting wire is rectangle or round rectangle；It is first magneto-resistor, second magneto-resistor, described
Third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are parallel with the extending direction of the long side, and first magnetic
Resistance and the magnetic susceptibility of second magneto-resistor are contrary, the magnetic susceptibility side of the third magneto-resistor and the 4th magneto-resistor
To opposite；First magneto-resistor and second magneto-resistor connect to form the first branch, the both ends connection of the first branch
Both ends of power, the third magneto-resistor and the 4th magneto-resistor connect to form second branch, and the both ends of the second branch connect
The both ends of power is connect, wherein connecting the magnetic of two magneto-resistors of same power end in the first branch and the second branch
Sensitive direction is identical；Signal processing module, first input end be connected to first magneto-resistor and second magneto-resistor it
Between, for obtaining the first voltage value between first magneto-resistor and second magneto-resistor, the second input terminal is connected to
Between the third magneto-resistor and the 4th magneto-resistor, for obtaining between the third magneto-resistor and the 4th magneto-resistor
Second voltage value；The signal processing module is also used to be obtained according to the difference of the first voltage value and the second voltage value
Take the electric current of the copper bar type conducting wire to be measured.
According to eighth aspect, the embodiment of the invention provides a kind of current measuring devices of copper bar type conducting wire, comprising: first
Magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are arranged, wherein institute close to the surface of copper bar type conducting wire to be measured
State the first magneto-resistor, second magneto-resistor is located in a long side of the copper bar type conducting wire longitudinal section shape to be measured
Portion, the third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；It is described to
The longitudinal section shape for surveying copper bar type conducting wire is rectangle or round rectangle；It is first magneto-resistor, second magneto-resistor, described
Third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are all the same and parallel with the extending direction of the long side；Described
One magneto-resistor and the third magneto-resistor connect to form the first branch, and the both ends of the first branch connect both ends of power, described
Second magneto-resistor and the 4th magneto-resistor connect to form second branch, and the both ends of the second branch connect the power supply two
End, wherein connecting the magnetic susceptibility direction phase of two magneto-resistors of same power end in the first branch and the second branch
Instead；Signal processing module, first input end is connected between first magneto-resistor and second magneto-resistor, for obtaining
The first voltage value between first magneto-resistor and the third magneto-resistor, the second input terminal are connected to second magnetoelectricity
Between resistance and the 4th magneto-resistor, for obtaining the second voltage between the third magneto-resistor and the 4th magneto-resistor
Value；The signal processing module is also used to be obtained according to the difference of the first voltage value and the second voltage value described to be measured
The electric current of copper bar type conducting wire.
Optionally, in current measuring device described in the 5th aspect, the 6th aspect, the 7th aspect or eighth aspect, feature
It is, the signal processing module includes operational amplifier.
Optionally, described in current measuring device described in the 5th aspect, the 6th aspect, the 7th aspect or eighth aspect
Copper bar type conducting wire to be measured and other copper bar type conducting wires being powered are arranged side by side along the direction of the long side.
Optionally, described in current measuring device described in the 5th aspect, the 6th aspect, the 7th aspect or eighth aspect
The magnetic susceptibility position of the corresponding magnetic sensing unit of copper bar type conducting wire to be measured is located in two short sides of adjacent energization copper bar type conducting wire
On the line of point.
Optionally, described in current measuring device described in the 5th aspect, the 6th aspect, the 7th aspect or eighth aspect
Copper bar type conducting wire bending to be measured is in " Z " font；The surface of " Z " the font sloping portion is used to that the magnetic sensing unit to be arranged,
And " Z " the font non-angled corresponds on the extending direction of the long side along arranged in a straight line.
The current measuring method and device of copper bar type conducting wire provided by the embodiment of the present invention, by magnetic sensing unit close to copper
The surface of row's type conducting wire is arranged and is located at the middle part of long side, the magnetic susceptibility direction of magnetic sensing unit and the length of longitudinal section shape
The extending direction on side is parallel, can relatively accurately export the measurement result of magnetic induction intensity when copper bar type conducting wire passes to electric current.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Figure 1A shows the structural schematic diagram of copper bar type conducting wire；
Figure 1B shows the Distribution of Magnetic Field schematic diagram around the copper bar type conducting wire of energization；
Fig. 1 C shows the magnetic induction intensity curve of the specific position close to copper bar type conductive line surfaces；
Fig. 2A shows a kind of flow chart of the current measuring method of copper bar type conducting wire according to an embodiment of the present invention；
Fig. 2 B shows the magnetic sensing unit of example according to the present invention and a kind of positional relationship of copper bar type conducting wire to be measured is shown
It is intended to；
Fig. 3 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention；
Fig. 3 B shows the magnetic sensing unit of example according to the present invention and another positional relationship of copper bar type conducting wire to be measured
Schematic diagram；
Fig. 4 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention；
Fig. 4 B shows a kind of spatial relation of two magneto-resistors；
Fig. 4 C shows the electrical connection of two magneto-resistors shown in Fig. 4 B；
Fig. 4 D shows a kind of electrical connection schematic diagram of operational amplifier suitable for Fig. 4 C；
Fig. 5 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention；
Fig. 5 B shows a kind of spatial relation of four magneto-resistors；
Fig. 5 C shows the electrical connection of four magneto-resistors shown in Fig. 5 B；
Fig. 5 D shows a kind of electrical connection schematic diagram of operational amplifier suitable for Fig. 5 C；
Fig. 6 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention；
Fig. 6 B shows another spatial relation of four magneto-resistors；
Fig. 6 C shows the electrical connection of four magneto-resistors shown in Fig. 6 B；
Fig. 6 D shows a kind of electrical connection schematic diagram of operational amplifier suitable for Fig. 6 C；
Fig. 7 A shows a kind of copper bar type conducting wire schematic diagram arranged side by side；
Fig. 7 B shows influence of the adjacent electrified wire to copper bar type conducting wire to be measured when copper bar type conducting wire is arranged side by side and is led
The error curve of cause；
Fig. 8 A shows a kind of adjacent copper bar type conducting wire detailed schematic arranged side by side；
Fig. 8 B shows the direction schematic diagram of the magnetic induction intensity of different location in Fig. 8 A；
Fig. 9 A shows the schematic diagram that a copper bar type conducting wire bending is in " Z " font；
Fig. 9 B shows the schematic diagram that two copper bar type conducting wire bendings are in " Z " font；
Fig. 9 C shows test result when copper bar type conducting wire to be measured is not bent；
Fig. 9 D shows copper bar type conducting wire bending to be measured in the test result after " Z " font.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Inventors have found that the Distribution of Magnetic Field around the copper bar type conducting wire being powered is as shown in Figure 1B, wherein A indicates the copper being powered
The longitudinal cross-section of row's type conducting wire, dotted line indicate magnetic induction line.In addition, inventor also studies the magnetic field of specific location, this
A little specific positions are distributed close to the surface of copper bar type conducting wire, and along the long side of copper bar type conducting wire longitudinal section shape.Result of study
As shown in Figure 1 C, wherein horizontal axis indicates at a distance from the middle part of long side, 0 position, that is, long side midpoint of horizontal axis；The longitudinal axis indicates
The numerical value of the component of the magnetic induction intensity of corresponding position in a predetermined direction, the predetermined direction are parallel with the extending direction of long side.
It can be seen that from Fig. 1 C on the surface close to copper bar type conducting wire, and be located at the position in the middle part of long side, magnetic induction intensity is in predetermined party
Upward component values are larger and numerical curve is relatively flat.Based on result of study shown in Fig. 1 C, this Shen is inventors herein proposed
The current measuring method and device of copper bar type conducting wire that please be described, are described in detail below application scheme.
It needs to illustrate in advance, the magnetic susceptibility direction in the application is direction vector, has both included " when the magnetic field of the direction
When increase, the direction (also referred to as positive magnetic susceptibility direction) of the positive output value increase of magneto sensor ", also include " when the magnetic field of the direction
When increase, the direction (also referred to as negative magnetic susceptibility direction) of the positive output value reduction of magneto sensor ".
Also arrange in the application: when only referring to magnetic susceptibility direction, which had not only included positive magnetic susceptibility direction, but also
Including negative magnetic susceptibility direction, positive and negative direction is not distinguished；And when referring to that magnetic susceptibility direction is identical, opposite, distinguish positive magnetosensitive
Feel direction, negative magnetic susceptibility direction, namely " magnetic susceptibility direction is identical " refers to that magnetic susceptibility direction is positive and magnetic susceptibility direction or be
Negative magnetic susceptibility direction, " magnetic susceptibility is contrary " refer to that be positive magnetic susceptibility direction, another one of one is negative magnetic susceptibility direction.
Embodiment one
Fig. 2A shows a kind of flow chart of the current measuring method of copper bar type conducting wire according to an embodiment of the present invention.Such as figure
Shown in 2A, this method comprises the following steps:
S101: at least one magnetic sensing unit is set close to the surface of copper bar type conducting wire to be measured, and at least one magnetic senses
Unit is located at the middle part of the long side of copper bar type conducting wire longitudinal section shape to be measured, and the longitudinal section shape of copper bar type conducting wire to be measured is
Rectangle or round rectangle (can be stringent rectangle, round rectangle, be also possible to be approximately rectangle, round rectangle)；Magnetic sensing
The magnetic susceptibility direction of unit is parallel with the extending direction of long side.
As shown in Figure 2 B, A indicates the longitudinal cross-section of copper bar type conducting wire to be measured, and "×" indicates to be circulated in copper bar conducting wire to be measured
Sense of current (i.e. from where reader paper or screen side be directed toward the other side)；X indicates magnetic sensing unit, magnetic sensing
Unit is located at the middle part of the long side of longitudinal section shape, can be one, is also possible to (in the position of X) along copper bar type conducting wire
Current flowing direction is arranged side by side multiple.Four-headed arrow in magnetic sensing unit X indicates the magnetic susceptibility direction of magnetic sensing unit,
It is i.e. parallel with the extending direction of long side, such as can be towards the left side shown in Fig. 2 B or the right.
Magnetic sensing unit in the application can be single magneto-resistor, be also possible to multiple magneto-resistors, or suddenly
That sensor or the unit that can sense magnetic induction intensity similar with Hall sensor.
S102: the output valve of at least one magnetic sensing unit is obtained.
S103: the electric current of copper bar type conducting wire to be measured is obtained according to the output valve of at least one magnetic sensing unit.
Step S103 can be averaged the output valve of at least two magnetic sensing units, or put to output valve
Greatly, to obtain final measurement result.
According to result of study shown in Fig. 1 C, it can be seen that magnetic sensing unit X close to copper bar type conducting wire surface and be located at
The middle part of the long side of longitudinal section shape, the component of magnetic induction intensity in a predetermined direction is stronger, convenient for output measurement result, no
It can be unable to measure since magnetic induction intensity is too weak；And due to being located at the position in the middle part of long side in Fig. 1 C, magnetic induction intensity is pre-
The numerical curve of fixed side's upward component is relatively flat, even if position slightly deviation when then the middle part of long side is arranged in magnetic sensing unit X
Measurement result will not be influenced, measurement result is more accurate.
Therefore, the current measuring method of copper bar type conducting wire provided by the embodiment of the present invention is by magnetic sensing unit close to copper bar
The surface of type conducting wire is arranged and is located at the middle part of the long side of longitudinal section shape, and the magnetic susceptibility direction of magnetic sensing unit with
The extending direction of long side is parallel, can relatively accurately obtain the measurement knot of magnetic induction intensity when copper bar type conducting wire passes to electric current
Fruit.
Embodiment two
Fig. 3 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention.Such as
Shown in Fig. 3 A, this method comprises the following steps:
S201: close to copper bar type conducting wire to be measured surface and in the two long of copper bar type conducting wire longitudinal section shape to be measured
The first magnetic sensing unit, the second magnetic sensing unit, the magnetic susceptibility direction of magnetic sensing unit and length is respectively set in position in the middle part of side
The extending direction on side is parallel, and the magnetic responsivity and magnetic susceptibility direction of the first magnetic sensing unit and the second magnetic sensing unit are homogeneous
Together；The longitudinal section shape of copper bar type conducting wire to be measured is rectangle or round rectangle.
" magnetic responsivity " of above-mentioned magnetic sensing unit refers to: when the magnetic induction intensity of magnetic sensing unit position increases
When one unit, the incrementss of the output valve of magnetic sensing unit.
As shown in Figure 3B, A indicates the longitudinal cross-section of copper bar type conducting wire to be measured, and "×" indicates to be flowed in copper bar type conducting wire to be measured
Logical sense of current (i.e. from where reader paper or screen side be directed toward the other side)；X and Y indicates magnetic sensing unit, this
The two is located at the middle part of two long sides of longitudinal section shape.Arrow in magnetic sensing unit X and Y indicates magnetic sensing unit
The magnetic susceptibility direction of X and Y is parallel with the extending direction of long side, and magnetic susceptibility direction is identical (can be towards shown in Fig. 3 B
The left side or the right, Fig. 3 B show towards the right.
Magnetic sensing unit in the application can be single magneto-resistor, be also possible to multiple magneto-resistors, or suddenly
That sensor or the unit that can sense magnetic induction intensity similar with Hall sensor.
S202: the output valve of at least one magnetic sensing unit is obtained.
S203: copper bar type to be measured is obtained according to the difference of the output valve of the first magnetic sensing unit and the second magnetic sensing unit and is led
The electric current of line.
As shown in Figure 3B, when passing to the electric current in diagram direction in copper bar type conducting wire A to be measured, the direction of magnetic induction intensity is such as
Shown in dotted line in Fig. 3 B, it can be seen that the direction of the magnetic induction intensity at magnetic sensing unit X and Y is opposite, but by
Be in the magnetic responsivity of magnetic sensing unit X and Y and magnetic susceptibility direction it is identical, then the output valve of magnetic sensing unit X and Y it
The numerical value of difference should be " result measured by a magnetic sensing unit X (or Y) is only arranged " (i.e. knot measured by embodiment one
Fruit) twice.
Therefore, the current measuring method of copper bar type conducting wire provided by the embodiment of the present invention passes through in copper bar type conducting wire to be measured
The first magnetic sensing unit, the second magnetic sensing unit, magnetic sensing unit are respectively set in the middle part of two long sides of longitudinal section shape
Magnetic susceptibility direction it is parallel with the extending direction of long side, and the magnetic responsivity of the first magnetic sensing unit and the second magnetic sensing unit and
Magnetic susceptibility direction is all the same, obtains measurement knot according to the difference of the output valve of the first magnetic sensing unit and the second magnetic sensing unit
The double output of measurement result even for more faint magnetic induction intensity, can also be obtained observable measurement by fruit
As a result.
Embodiment three
Fig. 4 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention.Such as
Shown in Fig. 4 A, this method comprises the following steps:
S301: close to copper bar type conducting wire to be measured surface and in the two long of copper bar type conducting wire longitudinal section shape to be measured
The first magneto-resistor, the second magneto-resistor is respectively set in position in the middle part of side, and the longitudinal section shape of copper bar type conducting wire to be measured is rectangle
Or round rectangle；The magnetic susceptibility direction of first magneto-resistor and the second magneto-resistor is parallel with the extending direction of long side, and the first magnetic
The magnetic susceptibility direction of resistance and the second magneto-resistor is identical；First magneto-resistor and the series connection of the second magneto-resistor, the both ends difference after series connection
Connect both ends of power.
By taking the first magneto-resistor 41, the second magneto-resistor 42 as an example, Fig. 4 B shows the spatial relation of the two magneto-resistors,
Fig. 4 C shows the electrical connection of the two magneto-resistors.
S302: the voltage value between the first magneto-resistor and the second magneto-resistor is obtained.
S303: the electric current of copper bar type conducting wire to be measured is obtained according to the voltage value between the first magneto-resistor and the second magneto-resistor.
Step S303 can linearly or nonlinearly compensate the voltage value between the first magneto-resistor and the second magneto-resistor,
Or the voltage value between the first magneto-resistor and the second magneto-resistor is amplified, to obtain final measurement result.Fig. 4 D
It shows step S303 and uses a kind of circuit for amplifying processing to the voltage value between the first magneto-resistor and the second magneto-resistor
Figure.
Example IV
Fig. 5 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention.Such as
Shown in Fig. 5 A, this method comprises the following steps:
S401: first magneto-resistor, the second magneto-resistor, third magneto-resistor, the are set close to the surface of copper bar type conducting wire to be measured
Four magneto-resistors, wherein the first magneto-resistor, the second magneto-resistor are located at a long side of copper bar type conducting wire longitudinal section shape to be measured
Middle part, third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of longitudinal section shape；Copper bar type conducting wire to be measured
Longitudinal section shape is rectangle or round rectangle；The magnetic of first magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor
Sensitive direction is parallel with the extending direction of long side, and the magnetic susceptibility of the first magneto-resistor and the second magneto-resistor is contrary, third
The magnetic susceptibility of magneto-resistor and the 4th magneto-resistor is contrary；First magneto-resistor and the second magneto-resistor connect to form the first branch, the
The both ends of one branch connect both ends of power, and third magneto-resistor and the 4th magneto-resistor connect to form second branch, and the two of second branch
End connection both ends of power, wherein connects the magnetic susceptibility direction of two magneto-resistors of same power end in the first branch and second branch
It is identical.
By taking the first magneto-resistor 51, the second magneto-resistor 52, third magneto-resistor 53, the 4th magneto-resistor 54 as an example, Fig. 5 B is shown
The spatial relation of this four magneto-resistors, Fig. 5 C show the electrical connection of this four magneto-resistors.It should be pointed out that figure
In relative positional relationship between the first magneto-resistor 51 and the second magneto-resistor 52 there is no limiting, similarly, third magneto-resistor 53
And the 4th relative positional relationship between magneto-resistor 54 does not also limit.
S402: obtaining the first voltage value between the first magneto-resistor and the second magneto-resistor, and obtains third magneto-resistor and the
Second voltage value between four magneto-resistors.
S403: the electric current of copper bar type conducting wire to be measured is obtained according to the difference of the first voltage value and second voltage value.
Step S403 can the difference to the first voltage value and second voltage value linearly or nonlinearly compensated or right
The difference of the first voltage value and second voltage value amplifies, to obtain final measurement result.Fig. 5 D shows step
S403 uses a kind of circuit diagram that processing is amplified to the difference of the first voltage value and second voltage value.
Embodiment five
Fig. 6 A shows the flow chart of the current measuring method of another copper bar type conducting wire according to an embodiment of the present invention.Such as
Shown in Fig. 6 A, this method comprises the following steps:
S501: first magneto-resistor, the second magneto-resistor, third magneto-resistor, the are set close to the surface of copper bar type conducting wire to be measured
Four magneto-resistors, wherein the first magneto-resistor, the second magneto-resistor are located at a long side of copper bar type conducting wire longitudinal section shape to be measured
Middle part, third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of longitudinal section shape；Copper bar type conducting wire to be measured
Longitudinal section shape is rectangle or round rectangle；The magnetic of first magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor
Sensitive direction is all the same, and parallel with the extending direction of long side；First magneto-resistor and third magneto-resistor connect to form the first branch,
The both ends of the first branch connect both ends of power, and the second magneto-resistor and the 4th magneto-resistor connect to form second branch, second branch
Both ends connect both ends of power, and the magnetic susceptibility side of two magneto-resistors of same power end is wherein connected in the first branch and second branch
To opposite.
By taking the first magneto-resistor 61, the second magneto-resistor 62, third magneto-resistor 63, the 4th magneto-resistor 64 as an example, Fig. 6 B is shown
The spatial relation of this four magneto-resistors, Fig. 6 C show the electrical connection of this four magneto-resistors.It should be pointed out that figure
In relative positional relationship between the first magneto-resistor 61 and the second magneto-resistor 62 there is no limiting, similarly, third magneto-resistor 63
And the 4th relative positional relationship between magneto-resistor 64 does not also limit.
S502: obtaining the first voltage value between the first magneto-resistor and third magneto-resistor, and obtains the second magneto-resistor and the
Second voltage value between four magneto-resistors.
S503: the electric current of copper bar type conducting wire to be measured is obtained according to the difference of the first voltage value and second voltage value.
Step S503 can the difference to the first voltage value and second voltage value linearly or nonlinearly compensated or right
The difference of the first voltage value and second voltage value amplifies, to obtain final measurement result.Fig. 6 D shows step
S503 uses a kind of circuit diagram that processing is amplified to the difference of the first voltage value and second voltage value.
Embodiment six
It is and any in embodiment one to five the embodiment of the invention provides the current measuring method of another copper bar type conducting wire
The difference of embodiment is, before the output valve for obtaining at least one magnetic sensing unit, keeps copper bar type conducting wire to be measured logical with other
The copper bar type conducting wire of electricity is arranged side by side along the direction of long side.
As shown in Figure 7 A, make copper bar type conducting wire A to be measured and other copper bar type conducting wire B, C being powered along copper bar type conducting wire to be measured
The longitudinal direction of the longitudinal section shape of A is arranged side by side.
Refer to Fig. 7 A, dotted ellipse curve indicates the magnetic induction curve for the copper bar type conducting wire B being powered, the curve with side by side
The center line (the dotted line OO ' in figure) for the multiple conducting wires being arranged be it is vertical, since magnetic sensing unit X is led close to copper bar type to be measured
The surface of line A is arranged, therefore magnetic sensing unit X and center line OO ' distance d1 are shorter.Therefore, in magnetic sensing unit X position
Place, the magnetic induction curve of energization copper bar type conducting wire B are almost nil in the component for being parallel to longitudinal direction.And copper bar type conducting wire to be measured
The magnetic susceptibility direction of the magnetic sensing unit on the surface A be it is parallel with long side, therefore, when copper bar type conducting wire to be measured and other be powered
When copper bar type conducting wire is arranged side by side along the direction of long side, the magnetic field of adjacent electrified wire will not have biggish shadow to measurement result
It rings.
In this regard, inventor has also carried out experimental verification, as shown in Figure 7 B, horizontal axis indicates adjacent copper bar type wire spacing (i.e.
The distance between the corresponding position of adjacent copper bar type conducting wire, such as distance d2 shown in Fig. 7 A), the longitudinal axis indicates that adjacent energization is led
Error caused by line influences measurement result, it can be seen that even if the spacing as low as 3cm of adjacent copper bar type conducting wire, error
Also only less than 2.0%, this data confirms " when copper bar type conducting wire to be measured and other copper bar type conducting wires being powered are along the direction of long side
When being arranged side by side, the magnetic field of adjacent electrified wire will not have large effect to measurement result " this conclusion.Based on this knot
Pass through by the current measuring method of, copper bar type conducting wire provided herein make the copper bar type conducting wire being powered along the direction of long side simultaneously
Row's setting, can reduce influence of the adjacent electrified wire to measurement result.
Optionally, according to Fig. 7 B, the spacing of adjacent copper bar type conducting wire can be set not less than 3cm.
Embodiment seven
It is and any in embodiment one to six the embodiment of the invention provides the current measuring method of another copper bar type conducting wire
The difference of embodiment is, further includes: the magnetic susceptibility position for adjusting the corresponding magnetic sensing unit of copper bar type conducting wire to be measured is located at phase
On the line at two short side midpoints of adjacent energization copper bar type conducting wire.
As shown in Figure 8 A, it is assumed that A is copper bar type conducting wire to be measured, then is copper to be measured close to the magnetic sensing unit X that the surface A is arranged
The corresponding magnetic sensing unit of row's type conducting wire A, PP ' are two of the energization copper bar type conducting wire B adjacent with the copper bar type conducting wire A to be measured
The line at short side midpoint, the present embodiment, which designs, adjusts the magnetic susceptibility position of magnetic sensing unit X on PP ' line.
Although the surface of A is arranged in X, still have between the magnetic susceptibility position of X and the surface of A a distance (i.e.
Make very small, also will affect magnetic flux density vector in the component in magnetic susceptibility direction).It is located on the line of magnetic induction of B, magnetic sensing is single
The position of first X is XO point, and the position on the surface A is AO point, then skilled addressee readily understands that magnetic strength at this two o'clock position
Answer intensity as shown in Figure 8 B, wherein solid arrow indicates that magnetic flux density vector, dotted arrow indicate the component of vector (i.e. in magnetic
The component of sensitive direction and magnetic susceptibility direction vertically-oriented component).It can be seen from fig. 8b that since XO point is located at PP ' even
On line, therefore the magnetic flux density vector at XO point is vertical with magnetic susceptibility direction, therefore the magnetic flux density vector at XO point exists
Component on magnetic susceptibility direction is 0；And since the magnetic flux density vector at AO point can not intersect vertically with magnetic susceptibility direction,
Therefore the magnetic flux density vector at AO point is inevitable important on magnetic susceptibility direction.Since the purpose of setting magnetic sensing unit is
Magnetic field strength of the copper bar type conducting wire to be measured on magnetic susceptibility direction is measured, therefore is experienced on magnetic sensing unit magnetic susceptibility direction
Magnetic field strength influenced that smaller, measurement result is more accurate by adjacent copper bar type conducting wire, it can be seen that, and be arranged in the position AO phase
Than the position XO, which is arranged in, in magnetic sensing unit can further increase the measuring accuracy of copper bar type conducting wire to be measured.
Embodiment eight
It is and any in embodiment one to seven the embodiment of the invention provides the current measuring method of another copper bar type conducting wire
The difference of embodiment is, is in " Z " font by copper bar type conducting wire to be measured bending.The surface of " Z " font sloping portion is for being arranged
Magnetic sensing unit, and " Z " font non-angled corresponds on the extending direction of long side along arranged in a straight line.
Fig. 9 A shows the schematic diagram that the bending of copper bar type conducting wire is in " Z " font, after bending, copper bar type conducting wire be divided into L,
M, N three parts, wherein L portion is substantially parallel with N section, and the part M is sloping portion.Magnetic sensing unit is arranged close to the part M
Surface setting, and the L portion of adjacent copper bar type conducting wire on the direction of long side along arranged in a straight line, the portion N of adjacent copper bar type conducting wire
Divide on the direction of long side along arranged in a straight line.Fig. 9 B shows two copper bar type conducting wire bendings in the schematic diagram of " Z " font arrangement.
Inventor has also carried out experimental verification, and Fig. 9 C shows test result when copper bar type conducting wire to be measured is not bent, figure
9D shows copper bar type conducting wire bending to be measured in the test result after " Z " font.In Fig. 9 C and Fig. 9 D, horizontal axis indicates adjacent
The distance between adjacent side of copper bar type conducting wire (i.e. distance d3 shown in Fig. 7 A), the longitudinal axis is magnetic induction intensity.Fig. 9 C and
Numerical value in Fig. 9 D on dotted line indicates " in the corresponding magnetic sensing unit position of copper bar type conducting wire to be measured, adjacent copper bar
The numerical value (not considering durection component) of the magnetic field strength in magnetic field produced by type conducting wire ", the numerical tabular in Fig. 9 C and Fig. 9 D on solid line
Show that " in the corresponding magnetic sensing unit position of copper bar type conducting wire to be measured, magnetic field caused by adjacent copper bar type conducting wire is at this
The component in magnetic sensing unit (magnetic sensing unit corresponding to copper bar type conducting wire i.e. to be measured) magnetic susceptibility direction ".
For example, A is copper bar type conducting wire to be measured in Fig. 7 A；Magnetic sensing unit X is corresponding with copper bar type conducting wire A to be measured, for surveying
Measure the electric current of copper bar type conducting wire to be measured；Copper bar type conducting wire B is adjacent with copper bar type conducting wire A to be measured.Then correspondingly, Fig. 9 C and figure
Dotted line in 9D can indicate the numerical value (not considering durection component) of magnetic induction intensity of the magnetic field caused by B at X position,
Solid line can indicate component of magnetic induction intensity of the magnetic field caused by B at X position on magnetic susceptibility direction.
Comparison diagram 9C and Fig. 9 D can be seen that number of the magnetic field strength of adjacent copper bar type conducting wire at magnetic sensing unit position
In the case that value (not considering durection component) is constant, the bending of copper bar type conducting wire will be surveyed in after " Z " font, can reduce copper to be measured
The magnetic from adjacent energization copper bar type conducting wire that magnetic sensing unit corresponding to row's type conducting wire is experienced on magnetic susceptibility direction
The influence of field intensity；Since the purpose of setting magnetic sensing unit is magnetic field of the measurement copper bar type conducting wire to be measured on magnetic susceptibility direction
Intensity, thus the magnetic field strength experienced on magnetic sensing unit magnetic susceptibility direction by adjacent copper bar type conducting wire influenced it is smaller,
Measurement result is more accurate, and copper bar type conducting wire to be measured bending also can be improved to the measurement of copper bar type conducting wire to be measured in " Z " font
Accuracy.
It should be added that above-mentioned can be improved copper bar type to be measured in " Z " font for copper bar type conducting wire to be measured bending
The principle of the measuring accuracy of conducting wire, it is to be difficult to explain that the angle being distributed from magnetic induction line, which goes analysis, those skilled in the art
Also it is difficult to find that this set-up mode can be improved the measurement accuracy of copper bar type conducting wire to be measured according to the theory that magnetic induction line is distributed.This
One is the discovery that inventor carries out what lot of experiments obtained on the basis of bold guess.Although can from Fig. 9 C and Fig. 9 D
Find out, the numerical value of the decline of magnetic field strength is not very big on magnetic susceptibility direction, but it will be appreciated by those skilled in the art that
Under the premise of measurement result is sufficiently accurate, it is also to generate to the prior art that the precision of measurement result can be made, which to improve 0.1% again,
Larger contribution.
Embodiment nine
The embodiment of the invention provides a kind of current measuring device of copper bar type conducting wire, which can be used for executing implementation
Method described in example one or its any one optional embodiment.The device includes at least one magnetic sensing unit and signal
Manage module.
At least one magnetic sensing unit close to copper bar type conducting wire to be measured surface be fixedly installed, and magnetic sensing unit be located to
Survey the middle part of the long side of copper bar type conducting wire longitudinal section shape, the magnetic susceptibility direction of magnetic sensing unit and the extending direction of the long side
In parallel；The longitudinal section shape of copper bar type conducting wire to be measured is rectangle or round rectangle.Signal processing module is for obtaining at least one
The output valve of a magnetic sensing unit, and obtain according to the output valve of at least one magnetic sensing unit the electricity of copper bar type conducting wire to be measured
Stream.Specifically refer to Fig. 2 B and embodiment one.
Magnetic sensing unit in the application can be single magneto-resistor, be also possible to multiple magneto-resistors, or suddenly
That sensor or the unit that can sense magnetic induction intensity similar with Hall sensor.
The signal processing module can be the module including processor chips, be also possible to operational amplifier and its periphery electricity
Road, or it is also possible to other electronic circuits, the application is without limitation.
The current measuring device of above-mentioned copper bar type conducting wire can relatively accurately export magnetic when copper bar type conducting wire passes to electric current
The measurement result of induction.Specifically refer to embodiment one.
Optionally, the positional relationship between magnetic sensing unit and copper bar type conducting wire to be measured, signal are arranged by fixed device
Processing module can be arranged independently of the fixation device, also can be set on the fixation device.When signal processing module is arranged
When on the securing means, it is provided with pcb board on fixed device, magnetic sensing unit and signal processing module are set on pcb board,
When measurement, it is only necessary to by PCB close to the surface of copper bar type conducting wire to be measured.
Embodiment ten
The embodiment of the invention provides the current measuring device of another copper bar type conducting wire, which can be used for executing reality
Apply method described in example two or its any one optional embodiment.The device and the difference of embodiment three are that magnetic senses
Unit includes at least the first magnetic sensing unit and the second magnetic sensing unit, and the two is set close to the surface of copper bar type conducting wire to be measured
It sets, and is located at the middle part of two long sides of copper bar type conducting wire longitudinal section shape to be measured, and the first magnetic sensing unit and
The magnetic susceptibility direction of two magnetic sensing units is identical.Correspondingly, signal processing module is used for according to the first magnetic sensing unit and second
The difference of the output valve of magnetic sensing unit obtains the electric current of copper bar type conducting wire to be measured.Specifically refer to Fig. 3 B and embodiment two.
Embodiment 11
The embodiment of the invention provides a kind of current measuring device of copper bar type conducting wire, which can be used for executing implementation
Method described in example three or its any one optional embodiment.As shown in figs. 4 b and 4 c, which includes the first magnetoelectricity
Hinder the 41, second magneto-resistor 42 and signal processing module.
First magneto-resistor 41 and the second magneto-resistor 42 are arranged close to the surface of copper bar type conducting wire to be measured, and are located to be measured
The middle part of two long sides of copper bar type conducting wire longitudinal section shape；The longitudinal section shape of copper bar type conducting wire to be measured is rectangle or circle
Angular moment shape；The magnetic susceptibility direction of first magneto-resistor 41 and the second magneto-resistor 42 is parallel with the extending direction of long side, and the first magnetic
Resistance 41 is identical with the magnetic susceptibility direction of the second magneto-resistor 42；First magneto-resistor 41 and the series connection of the second magneto-resistor 42, after series connection
Both ends are separately connected both ends of power.
The input terminal of signal processing module is connected between the first magneto-resistor 41 and the second magneto-resistor 42, for obtaining first
Voltage value between magneto-resistor 41 and the second magneto-resistor 42, and according to the voltage between the first magneto-resistor 41 and the second magneto-resistor 42
Value obtains the electric current of copper bar type conducting wire to be measured.
Specifically refer to Fig. 4 B, Fig. 4 C and embodiment three.
The signal processing module can be the module including processor chips, be also possible to operational amplifier and its periphery electricity
Road, or it is also possible to other electronic circuits, the application is without limitation.Optionally, signal processing module may include such as Fig. 4 D
Shown in operational amplifier, the Vo in Fig. 4 D is input terminal, and Vout is output end.
Embodiment 12
The embodiment of the invention provides a kind of current measuring device of copper bar type conducting wire, which can be used for executing implementation
The method of example four or its any one optional embodiment.As shown in figs. 5 b and 5 c, the device include the first magneto-resistor 51,
Second magneto-resistor 52, third magneto-resistor 53, the 4th magneto-resistor 54 and signal processing module.
First magneto-resistor 51, the second magneto-resistor 52, third magneto-resistor 53, the 4th magneto-resistor 54 are close to copper bar type conducting wire to be measured
Surface setting, wherein the first magneto-resistor 51, the second magneto-resistor 52 are located at one of copper bar type conducting wire longitudinal section shape to be measured
The middle part of long side, third magneto-resistor 53, the 4th magneto-resistor 54 are located at the middle part of another long side of longitudinal section shape；Copper to be measured
The longitudinal section shape of row's type conducting wire is rectangle or round rectangle；First magneto-resistor 51, the second magneto-resistor 52, third magneto-resistor
53, the magnetic susceptibility direction of the 4th magneto-resistor 54 is parallel with the extending direction of long side, and the first magneto-resistor 51 and the second magneto-resistor
52 magnetic susceptibility is contrary, and the magnetic susceptibility of third magneto-resistor 53 and the 4th magneto-resistor 54 is contrary；First magneto-resistor, 51 He
The series connection of second magneto-resistor 52 forms the first branch, and the both ends of the first branch connect both ends of power, third magneto-resistor 53 and the 4th magnetic
The series connection of resistance 54 forms second branch, and the both ends of second branch connect both ends of power, wherein connect in the first branch and second branch
The magnetic susceptibility direction for connecing two magneto-resistors of same power end is identical；
The first input end of signal processing module is connected between the first magneto-resistor 51 and the second magneto-resistor 52, for obtaining
Second input terminal of the first voltage value between the first magneto-resistor 51 and the second magneto-resistor 52, signal processing module is connected to third
Between magneto-resistor 53 and the 4th magneto-resistor 54, for obtaining the second voltage between third magneto-resistor 53 and the 4th magneto-resistor 54
Value.Signal processing module is also used to obtain the electricity of copper bar type conducting wire to be measured according to the difference of the first voltage value and second voltage value
Stream.
Specifically refer to Fig. 5 B, Fig. 5 C and example IV.
The signal processing module can be the module including processor chips, be also possible to operational amplifier and its periphery electricity
Road, or it is also possible to other electronic circuits, the application is without limitation.Optionally, signal processing module can be such as Fig. 5 D institute
The operational amplifier shown, the V+ in Fig. 5 D are first input end, and V- is the second input terminal, and Vout is output end.
Embodiment 13
The embodiment of the invention provides a kind of current measuring device of copper bar type conducting wire, which can be used for executing implementation
The method of example five or its any one optional embodiment.As shown in Fig. 6 B and Fig. 6 C, the device include the first magneto-resistor 61,
Second magneto-resistor 62, third magneto-resistor 63, the 4th magneto-resistor 64 and signal processing module.
First magneto-resistor 61, the second magneto-resistor 62, third magneto-resistor 63, the 4th magneto-resistor 64, lead close to copper bar type to be measured
The surface of line is arranged, wherein the first magneto-resistor 61, the second magneto-resistor 62 are located at the one of copper bar type conducting wire longitudinal section shape to be measured
The middle part of a long side, third magneto-resistor 63, the 4th magneto-resistor 64 are located at the middle part of another long side of longitudinal section shape；It is to be measured
The longitudinal section shape of copper bar type conducting wire is rectangle or round rectangle；First magneto-resistor 61, the second magneto-resistor 62, third magneto-resistor
63, the magnetic susceptibility direction of the 4th magneto-resistor 64 is all the same, and parallel with the extending direction of long side；First magneto-resistor 61 and third magnetic
The series connection of resistance 63 forms the first branch, and the both ends of the first branch connect both ends of power, the second magneto-resistor 62 and the 4th magneto-resistor 64
Series connection forms second branch, and the both ends of second branch connect both ends of power, wherein connects in the first branch and second branch same
The magnetic susceptibility of two magneto-resistors of power end is contrary.
Signal processing module, first input end is connected between the first magneto-resistor 61 and the second magneto-resistor 62, for obtaining
The first voltage value between the first magneto-resistor 61 and third magneto-resistor 63 is taken, the second input terminal is connected to 62 He of the second magneto-resistor
Between 4th magneto-resistor 64, for obtaining the second voltage value between third magneto-resistor 63 and the 4th magneto-resistor 64；Signal processing
Module is also used to obtain the electric current of copper bar type conducting wire to be measured according to the difference of the first voltage value and second voltage value.
Specifically refer to Fig. 6 B, Fig. 6 C and embodiment five.
The signal processing module can be the module including processor chips, be also possible to operational amplifier and its periphery electricity
Road, or it is also possible to other electronic circuits, the application is without limitation.Optionally, signal processing module can be such as Fig. 6 D institute
The operational amplifier shown, the V+ in Fig. 6 D are first input end, and V- is the second input terminal, and Vout is output end.
Although being described in conjunction with the accompanying the embodiment of the present invention, those skilled in the art can not depart from the present invention
Spirit and scope in the case where various modifications and variations can be made, such modifications and variations are each fallen within by appended claims institute
Within the scope of restriction.
Claims (17)
1. a kind of current measuring method of copper bar type conducting wire characterized by comprising
Close to the surface of copper bar type conducting wire to be measured, at least one magnetic sensing unit, and at least one described magnetic sensing unit position are set
In the middle part of the long side of the copper bar type conducting wire longitudinal section shape to be measured, the longitudinal section shape of the copper bar type conducting wire to be measured
For rectangle or round rectangle；The magnetic susceptibility direction of the magnetic sensing unit is parallel with the extending direction of the long side；
Obtain the output valve of at least one magnetic sensing unit；
The electric current of the copper bar type conducting wire to be measured is obtained according to the output valve of at least one magnetic sensing unit.
2. the current measuring method of copper bar type conducting wire according to claim 1, which is characterized in that described close to copper bar to be measured
Nearby at least one magnetic sensing unit is arranged in the surface of type conducting wire, and at least one magnetic sensing unit is located at the copper bar type to be measured
The step of middle part of the long side of conducting wire longitudinal section shape includes:
Close to copper bar type conducting wire to be measured surface and in the middle part of two long sides of the copper bar type conducting wire longitudinal section shape to be measured
Position be respectively set the first magnetic sensing unit, the second magnetic sensing unit, the first magnetic sensing unit and second magnetic pass
Magnetic responsivity and the magnetic susceptibility direction for feeling unit are all the same；
Correspondingly, the output valve of at least one magnetic sensing unit according to obtains the electric current of the copper bar type conducting wire to be measured
The step of include: according to the difference of the output valve of the first magnetic sensing unit and the second magnetic sensing unit obtain it is described to
Survey the electric current of copper bar type conducting wire.
3. a kind of current measuring method of copper bar type conducting wire characterized by comprising
Close to copper bar type conducting wire to be measured surface and in the middle part of two long sides of the copper bar type conducting wire longitudinal section shape to be measured
Position be respectively set the first magneto-resistor, the second magneto-resistor, the longitudinal section shape of the copper bar type conducting wire to be measured be rectangle or
Round rectangle；The magnetic susceptibility direction of first magneto-resistor and second magneto-resistor is flat with the extending direction of the long side
Row, and first magneto-resistor is identical with the magnetic susceptibility direction of second magneto-resistor；First magneto-resistor and described second
Magneto-resistor series connection, the both ends after series connection are separately connected both ends of power；
Obtain the voltage value between first magneto-resistor and second magneto-resistor；
The electricity of the copper bar type conducting wire to be measured is obtained according to the voltage value between first magneto-resistor and second magneto-resistor
Stream.
4. a kind of current measuring method of copper bar type conducting wire characterized by comprising
Close to the surface of copper bar type conducting wire to be measured, the first magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are set,
Wherein, first magneto-resistor, second magneto-resistor are located at the one long of the copper bar type conducting wire longitudinal section shape to be measured
The middle part on side, the third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；
The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；First magneto-resistor, second magnetoelectricity
Resistance, the third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are parallel with the extending direction of the long side and described
The magnetic susceptibility of first magneto-resistor and second magneto-resistor is contrary, the magnetic of the third magneto-resistor and the 4th magneto-resistor
Sensitive direction is opposite；First magneto-resistor and second magneto-resistor connect to form the first branch, and the two of the first branch
End connection both ends of power, the third magneto-resistor and the 4th magneto-resistor connect to form second branch, the second branch
Both ends connect the both ends of power, wherein connecting two magnetoelectricities of same power end in the first branch and the second branch
The magnetic susceptibility direction of resistance is identical；
Obtain the first voltage value between first magneto-resistor and second magneto-resistor, and obtain the third magneto-resistor and
Second voltage value between 4th magneto-resistor；
The electric current of the copper bar type conducting wire to be measured is obtained according to the difference of the first voltage value and the second voltage value.
5. a kind of current measuring method of copper bar type conducting wire characterized by comprising
Close to the surface of copper bar type conducting wire to be measured, the first magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are set,
Wherein, first magneto-resistor, second magneto-resistor are located at the one long of the copper bar type conducting wire longitudinal section shape to be measured
The middle part on side, the third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；
The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；First magneto-resistor, second magnetoelectricity
Resistance, the third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are all the same, and flat with the extending direction of the long side
Row；First magneto-resistor and the third magneto-resistor connect to form the first branch, and the both ends of the first branch connect power supply
Both ends, second magneto-resistor and the 4th magneto-resistor connect to form second branch, and the both ends of the second branch connect institute
Both ends of power is stated, wherein connecting the magnetic susceptibility of two magneto-resistors of same power end in the first branch and the second branch
It is contrary；
Obtain the first voltage value between first magneto-resistor and the third magneto-resistor, and obtain second magneto-resistor and
Second voltage value between 4th magneto-resistor；
The electric current of the copper bar type conducting wire to be measured is obtained according to the difference of the first voltage value and the second voltage value.
6. the current measuring method of copper bar type conducting wire according to any one of claims 1 to 5, the method also includes:
The copper bar type conducting wire to be measured and other copper bar type conducting wires being powered is arranged side by side along the direction of the long side.
7. the current measuring method of copper bar type conducting wire according to any one of claims 1 to 5, which is characterized in that the side
Method further include: the magnetic susceptibility position for adjusting the corresponding magnetic sensing unit of the copper bar type conducting wire to be measured or magneto-resistor is located at adjacent lead to
On the line at two short side midpoints of electrolytic copper row's type conducting wire.
8. the current measuring method of copper bar type conducting wire according to any one of claims 1 to 5, which is characterized in that the side
Method further include:
It is in " Z " font by the copper bar type conducting wire bending to be measured；The surface of " Z " the font sloping portion is for being arranged the magnetic
Sensing unit, and " Z " the font non-angled corresponds on the extending direction of the long side along arranged in a straight line.
9. a kind of current measuring device of copper bar type conducting wire characterized by comprising
At least one magnetic sensing unit is fixedly installed close to the surface of copper bar type conducting wire to be measured, and the magnetic sensing unit is located at
The middle part of the long side of the copper bar type conducting wire longitudinal section shape to be measured, the magnetic susceptibility direction of the magnetic sensing unit and the length
The extending direction on side is parallel；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；
Signal processing module, for obtaining the output valve of at least one magnetic sensing unit, and according at least one described magnetic
The output valve of sensing unit obtains the electric current of the copper bar type conducting wire to be measured.
10. the current measuring device of copper bar type conducting wire according to claim 9, which is characterized in that at least one described magnetic
Sensing unit includes at least:
First magnetic sensing unit and the second magnetic sensing unit are arranged close to the surface of copper bar type conducting wire to be measured, and are located at institute
State the middle part of two long sides of copper bar type conducting wire longitudinal section shape to be measured, and the first magnetic sensing unit and second magnetic
The magnetic responsivity of sensing unit and magnetic susceptibility direction are all the same；
Correspondingly, the signal processing module is used for according to the defeated of the first magnetic sensing unit and the second magnetic sensing unit
The difference being worth out obtains the electric current of the copper bar type conducting wire to be measured.
11. a kind of current measuring device of copper bar type conducting wire characterized by comprising
First magneto-resistor, the second magneto-resistor are arranged close to the surface of copper bar type conducting wire to be measured, and are located at the copper bar to be measured
The middle part of two long sides of type conducting wire longitudinal section shape；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or circle
Angular moment shape；The magnetic susceptibility direction of first magneto-resistor and second magneto-resistor is parallel with the extending direction of the long side,
And first magneto-resistor is identical with the magnetic susceptibility direction of second magneto-resistor；First magneto-resistor and second magnetoelectricity
Resistance series connection, the both ends after series connection are separately connected both ends of power；
Signal processing module, input terminal is connected between first magneto-resistor and second magneto-resistor, for obtaining
The voltage value between the first magneto-resistor and second magneto-resistor is stated, and according to first magneto-resistor and second magneto-resistor
Between voltage value obtain the electric current of the copper bar type conducting wire to be measured.
12. a kind of current measuring device of copper bar type conducting wire characterized by comprising
First magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are arranged close to the surface of copper bar type conducting wire to be measured,
Wherein, first magneto-resistor, second magneto-resistor are located at the one long of the copper bar type conducting wire longitudinal section shape to be measured
The middle part on side, the third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；
The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；First magneto-resistor, second magnetoelectricity
Resistance, the third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are parallel with the extending direction of the long side and described
The magnetic susceptibility of first magneto-resistor and second magneto-resistor is contrary, the magnetic of the third magneto-resistor and the 4th magneto-resistor
Sensitive direction is opposite；First magneto-resistor and second magneto-resistor connect to form the first branch, and the two of the first branch
End connection both ends of power, the third magneto-resistor and the 4th magneto-resistor connect to form second branch, the second branch
Both ends connect the both ends of power, wherein connecting two magnetoelectricities of same power end in the first branch and the second branch
The magnetic susceptibility direction of resistance is identical；
Signal processing module, first input end is connected between first magneto-resistor and second magneto-resistor, for obtaining
The first voltage value between first magneto-resistor and second magneto-resistor is taken, the second input terminal is connected to the third magnetic
Between resistance and the 4th magneto-resistor, for obtaining the second voltage between the third magneto-resistor and the 4th magneto-resistor
Value；The signal processing module is also used to be obtained according to the difference of the first voltage value and the second voltage value described to be measured
The electric current of copper bar type conducting wire.
13. a kind of current measuring device of copper bar type conducting wire characterized by comprising
First magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are arranged close to the surface of copper bar type conducting wire to be measured,
Wherein, first magneto-resistor, second magneto-resistor are located at the one long of the copper bar type conducting wire longitudinal section shape to be measured
The middle part on side, the third magneto-resistor, the 4th magneto-resistor are located at the middle part of another long side of the longitudinal section shape；
The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；First magneto-resistor, second magnetoelectricity
Resistance, the third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are all the same, and flat with the extending direction of the long side
Row；First magneto-resistor and the third magneto-resistor connect to form the first branch, and the both ends of the first branch connect power supply
Both ends, second magneto-resistor and the 4th magneto-resistor connect to form second branch, and the both ends of the second branch connect institute
Both ends of power is stated, wherein connecting the magnetic susceptibility of two magneto-resistors of same power end in the first branch and the second branch
It is contrary；
Signal processing module, first input end is connected between first magneto-resistor and second magneto-resistor, for obtaining
The first voltage value between first magneto-resistor and the third magneto-resistor is taken, the second input terminal is connected to second magnetic
Between resistance and the 4th magneto-resistor, for obtaining the second voltage between the third magneto-resistor and the 4th magneto-resistor
Value；The signal processing module is also used to be obtained according to the difference of the first voltage value and the second voltage value described to be measured
The electric current of copper bar type conducting wire.
14. according to the current measuring device of the described in any item copper bar type conducting wires of claim 9 to 13, which is characterized in that described
Signal processing module includes operational amplifier.
15. according to the current measuring device of the described in any item copper bar type conducting wires of claim 9 to 13, which is characterized in that described
Copper bar type conducting wire to be measured and other copper bar type conducting wires being powered are arranged side by side along the direction of the long side.
16. according to the current measuring device of the described in any item copper bar type conducting wires of claim 9 to 13, which is characterized in that described
The magnetic susceptibility position of the corresponding magnetic sensing unit of copper bar type conducting wire to be measured is located in two short sides of adjacent energization copper bar type conducting wire
On the line of point.
17. according to the current measuring device of the described in any item copper bar type conducting wires of claim 9 to 13, which is characterized in that described
Copper bar type conducting wire bending to be measured is in " Z " font；The surface of " Z " the font sloping portion is used to that the magnetic sensing unit to be arranged,
And " Z " the font non-angled corresponds on the extending direction of the long side along arranged in a straight line.
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| CN201811457305.XA CN109613322A (en) | 2018-11-30 | 2018-11-30 | The current measuring method and device of copper bar type conducting wire |
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| CN201811457305.XA CN109613322A (en) | 2018-11-30 | 2018-11-30 | The current measuring method and device of copper bar type conducting wire |
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