CN209446649U - The current measuring device of copper bar type conducting wire - Google Patents
The current measuring device of copper bar type conducting wire Download PDFInfo
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- CN209446649U CN209446649U CN201822007751.2U CN201822007751U CN209446649U CN 209446649 U CN209446649 U CN 209446649U CN 201822007751 U CN201822007751 U CN 201822007751U CN 209446649 U CN209446649 U CN 209446649U
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- 229910052802 copper Inorganic materials 0.000 title claims abstract description 157
- 239000010949 copper Substances 0.000 title claims abstract description 157
- 238000012545 processing Methods 0.000 claims abstract description 34
- 230000006698 induction Effects 0.000 claims abstract description 33
- 238000005259 measurement Methods 0.000 abstract description 24
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- 230000005611 electricity Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
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- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The utility model discloses the current measuring devices of copper bar type conducting wire, described device includes: the first magnetic sensing unit and the second magnetic sensing unit, it is fixedly installed in the longitudinal direction of copper bar type conducting wire longitudinal section shape to be measured respectively, long side edge nearby first position and the second position, the first position and the second position are located at the two sides of the short 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；Signal processing module, the difference of the magnetic induction intensity for obtaining the first position and the second position, and obtain according to the difference electric current of the copper bar type conducting wire to be measured.The current measuring device of copper bar type conducting wire provided by the utility model embodiment can relatively accurately export the measurement result of magnetic induction intensity when copper bar type conducting wire passes to electric current；In addition, the frequency scope of application is wider not vulnerable to the influence of power frequency, there is preferable frequency characteristic.
Description
Technical field
The utility model relates to current sensing techniques fields, and in particular to the current measuring 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 utility model embodiment provides the current measuring device of copper bar type conducting wire, to solve existing side
Method can not accurately measure the problem of electric current of copper bar type conducting wire.
According in a first aspect, the utility model embodiment provides a kind of current measuring device of copper bar type conducting wire, comprising:
First magnetic sensing unit and the second magnetic sensing unit are fixedly installed on the long side of copper bar type conducting wire longitudinal section shape to be measured respectively
On direction, long side edge nearby first position and the second position, the first position and the second position are located at described
The two sides of the short side of longitudinal section shape；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；Letter
Number processing module, the difference of the magnetic induction intensity for obtaining the first position and the second position, and according to the difference
Value obtains the electric current of the copper bar type conducting wire to be measured.
According to second aspect, the utility model embodiment provides a kind of current measuring device of copper bar type conducting wire, comprising:
First magneto-resistor, the second magneto-resistor are set to the long side side in the longitudinal direction of copper bar type conducting wire longitudinal section shape to be measured
Near edge, and the position that first magneto-resistor and second magneto-resistor is arranged is located at the short of the longitudinal section shape
The two sides on side；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；First magneto-resistor and institute
The magnetic susceptibility direction for stating the second magneto-resistor is parallel with the extending direction of the long side, and first magneto-resistor and described second
The magnetic susceptibility direction of magneto-resistor is identical；First magneto-resistor and second magneto-resistor series connection, the both ends after series connection connect respectively
Connect both ends of power；Signal processing module, input terminal are connected between first magneto-resistor and second magneto-resistor, are used for
The voltage value between first magneto-resistor and second magneto-resistor is obtained, and according to first magneto-resistor and described second
Voltage value between magneto-resistor obtains the electric current of the copper bar type conducting wire to be measured.
According to the third aspect, the utility model embodiment provides a kind of current measuring device of copper bar type conducting wire, comprising:
First magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are set in copper bar type conducting wire longitudinal cross-section to be measured shape
First position and the second position in the longitudinal direction of shape, near long side edge；The first position and the second position point
Not Wei Yu the longitudinal section shape short side two sides, wherein shown first magneto-resistor and the 4th magneto-resistor are set to described
First position, second magneto-resistor and the third magneto-resistor are set to the second position；The copper bar type conducting wire to be measured
Longitudinal section shape be rectangle or round rectangle；First magneto-resistor, second magneto-resistor, the third magneto-resistor,
The magnetic susceptibility direction of 4th magneto-resistor is identical, and parallel with the extending direction of the long side；First magneto-resistor and
The second magneto-resistor series connection, the both ends after series connection connect both ends of power, the third magneto-resistor and the 4th magneto-resistor string
Connection, the both ends after series connection connect the both ends of power, wherein first magneto-resistor connects same electricity with the third magneto-resistor
Source；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.
Optionally, in device described in first aspect, second aspect or the third aspect, the signal processing module includes fortune
Calculate amplifier.
Optionally, in device described in first aspect, second aspect or the third aspect, the copper bar type conducting wire to be measured and its
The copper bar type conducting wire that he is powered is arranged side by side along the direction of the long side.
Optionally, in device described in first aspect, second aspect or the third aspect, the copper bar type conducting wire to be measured is corresponding
Magnetic sensing unit magnetic susceptibility position two short side midpoints being located at adjacent energization copper bar type conducting wire line on.
The current measuring device of copper bar type conducting wire, can relatively accurately export copper provided by the utility model embodiment
The measurement result of magnetic induction intensity when row's type conducting wire passes to electric current；In addition, not vulnerable to the influence of power frequency, the frequency scope of application
It is relatively wide, there is preferable frequency characteristic.
Detailed description of the invention
Can be more clearly understood the feature and advantage of the utility model by reference to attached drawing, attached drawing be schematically without
It is interpreted as carrying out any restrictions to the utility model, in the accompanying 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. 2A and Fig. 2 B shows in the longitudinal direction of copper bar type conductive line surfaces, near long side edge on magnetic induction it is strong
Spend the rule of distribution；
Fig. 3 A shows a kind of flow chart of the current measuring method of copper bar type conducting wire according to the utility model embodiment；
Fig. 3 B is shown to close according to the magnetic sensing unit of the example of the utility model and a kind of position of copper bar type conducting wire to be measured
It is schematic diagram；
The frequency characteristic that Fig. 3 C shows the current measuring method of the copper bar type conducting wire according to the utility model embodiment is shown
It is intended to；
Fig. 4 A shows the process of the current measuring method of another copper bar type conducting wire according to the utility model embodiment
Figure；
Fig. 4 B shows a kind of spatial relation of two magneto-resistors；
Fig. 4 C shows a kind of 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 process of the current measuring method of another copper bar type conducting wire according to the utility model embodiment
Figure；
Fig. 5 B shows a kind of spatial relation of four magneto-resistors；
Fig. 5 C shows a kind of 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 a kind of copper bar type conducting wire schematic diagram arranged side by side；
Fig. 6 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. 7 A shows a kind of adjacent copper bar type conducting wire detailed schematic arranged side by side；
Fig. 7 B shows the direction schematic diagram of the magnetic induction intensity of different location in Fig. 7 A.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, those skilled in the art's every other embodiment obtained without creative efforts, belongs to this reality
With novel protected range.
Distribution of Magnetic Field around the copper bar type conducting wire of energization is as shown in Figure 1B, and wherein A indicates the copper bar type conducting wire being powered
Longitudinal cross-section, dotted line indicate magnetic induction line.Inventors have found that near the long side edge of copper bar type conductive line surfaces, magnetic induction intensity
There are rules as shown in Figure 2 A for component distribution in the long side direction, namely: in the length of copper bar type conducting wire longitudinal section shape
Side to the other side of short side on edge direction, from short side, the component values of magnetic induction intensity in the long side direction are gradually reduced；
Using the position where short side in longitudinal direction as the zero point of abscissa, then the numerical value of magnetic induction intensity component in the long side direction is bent
Line is centrosymmetric substantially about the intersection point on the longitudinal axis.
Further, inventor has studied in the longitudinal direction of copper bar type conducting wire longitudinal section shape every preset distance
Magnetic induction intensity component between the two o'clock of (such as 4mm) numerical value change amount (namely
Slope of a curve shown in Fig. 2A), result of study is as shown in Figure 2 B.As can be seen from Figure 2B, short in the long side direction
The numerical value change amount of position where side, magnetic induction intensity component in the long side direction is maximum.
Based on result of study shown in Fig. 2A and Fig. 2 B, the electric current of copper bar type conducting wire described herein is inventors herein proposed
Measurement method and device, 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. 3 A shows a kind of flow chart of the current measuring method of copper bar type conducting wire according to the utility model embodiment.
As shown in Figure 3A, this method comprises the following steps:
S101: it obtains in the longitudinal direction of copper bar type conducting wire longitudinal section shape to be measured, first position near long side edge
With the magnetic induction intensity of the second position, first position and the second position are located at the two sides of the short side of longitudinal section shape.To
The longitudinal section shape for surveying copper bar type conducting wire is rectangle or round rectangle.
S102: the difference of the magnetic induction intensity of first position and the second position is obtained.
S103: the electric current of copper bar type conducting wire to be measured is obtained according to difference.
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, Y is indicated for magnetic sensing to be arranged
The first position and the second position of unit, first position X and second position Y be located in the longitudinal direction of longitudinal section shape (
Line both i.e. is parallel with long side), positioned at the adjacent edges of long side, and first position X and second position Y be located at it is vertical
To the two sides of the short side of cross sectional shape.
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.
Result of study shown in B according to fig. 2, it can be seen that the position where short side in the long side direction, magnetic induction intensity
The numerical value change amount of component is maximum in the long side direction, convenient for output measurement result, will not due to output numerical value is too small and vulnerable to
Interference, measurement result are more accurate.Therefore, the current measuring method of copper bar type conducting wire provided by the utility model embodiment,
The measurement result of magnetic induction intensity when copper bar type conducting wire passes to electric current can relatively accurately be exported.
Inventor has also carried out grinding for frequency characteristic to the current measuring method of copper bar type conducting wire provided by the utility model
Study carefully, method particularly includes: 1Hz electric current is passed to copper bar type conducting wire to be measured, and is worth on the basis of measurement result at this time；It incrementally increases
The frequency of electric current obtains measurement result respectively, and the measurement result after measurement result is normalized divided by a reference value.This grinds
It is as shown in Figure 3 C to study carefully result, it can be seen from the figure that pass in the copper bar type conducting wire to be measured frequency be 100Hz or so and
When 100Hz electric current below, measurement result hardly becomes.Therefore, the electric current of copper bar type conducting wire provided by the utility model is surveyed
For amount method not vulnerable to the influence of power frequency, the frequency scope of application is wider, has preferable frequency characteristic.
Embodiment two
Fig. 4 A shows the process of the current measuring method of another copper bar type conducting wire according to the utility model embodiment
Figure.As shown in Figure 4 A, this method comprises the following steps:
S201: in the longitudinal direction of copper bar type conducting wire longitudinal section shape to be measured, near long side edge first position and
Second position distribution the first magneto-resistor of setting and the second magneto-resistor, first position and the second position are located at longitudinal section shape
Short side two sides；The longitudinal section shape of copper bar type conducting wire to be measured is rectangle or round rectangle；First magneto-resistor and the second magnetic
The magnetic susceptibility direction of resistance is parallel with the extending direction of long side, and the magnetic susceptibility direction phase of the first magneto-resistor and the second magneto-resistor
Together；First magneto-resistor and the series connection of the second magneto-resistor, the both ends after series connection are separately connected both ends of power.
S202: the voltage value between the first magneto-resistor and the second magneto-resistor is obtained.
S203: 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.
As shown in Figure 4 B, A indicates the longitudinal cross-section of copper bar type conducting wire to be measured, and "×" expression passes to electric current.X, Y indicates difference
For the first position and the second position of the first magneto-resistor of magnetic sensing unit, the second magneto-resistor, first position, the second position to be arranged
Be specifically defined and refer to embodiment one.The difference of the embodiment and embodiment one is that X, second position Y divide in first position
First magneto-resistor 41, the second magneto-resistor 42 are not set, and first magneto-resistor 41 is identical with the magnetic susceptibility direction of the second magneto-resistor 42
(as shown in the arrow in Fig. 4 B), and it is parallel with the direction of long side；As shown in Figure 4 C, the first magneto-resistor 41 and the second magneto-resistor
42 series connection, the both ends after series connection are separately connected both ends of power.
Assuming that the first magneto-resistor 41 is R1=R0+k·B1, wherein R0It in magnetic induction intensity is zero for the first magneto-resistor 41
When resistance value, B1For the magnetic induction intensity where the first magneto-resistor 41, k is the change rate of the first magneto-resistor 41；Second magnetoelectricity
The resistance value of resistance 42 is R2=R0+k·B2, wherein R0For resistance value of second magneto-resistor 42 when magnetic induction intensity is zero, (magnetic induction is strong
When degree is zero, the resistance value of the first magneto-resistor 41 and the second magneto-resistor 42 is equal), B2For the magnetic induction where the second magneto-resistor 42
Intensity, k are the change rate of the second magneto-resistor 42.So, the voltage between the first magneto-resistor 41 and the second magneto-resistor 42 is
Wherein, VccFor supply voltage.
When copper bar type conducting wire to be measured does not pass to electric current, the voltage between the first magneto-resistor 41 and the second magneto-resistor 42 is answered
For V0=Vcc/2.So before and after energization, the difference of output voltage between the first magneto-resistor 41 and the second magneto-resistor 42 are as follows:
It should be noted that in the final step that above-mentioned formula (1) derives, due to R under actual conditions0Numerical value it is often remote
Much larger than B1And B2Numerical value, thus k (B1+B2) it can be approximated to be 0, to obtain the final result of above-mentioned formula (1).
It can be seen that before and after energization according to the final result of above-mentioned formula (1), the first magneto-resistor 41 and the second magneto-resistor
The difference of output voltage and the first magneto-resistor 41, the difference of 42 position magnetic induction intensity of the second magneto-resistor are at just between 42
Than.Therefore, when being powered according to copper bar type conducting wire to be measured between first magneto-resistor 41 and the second magneto-resistor 42 voltage value that exports with
The difference of reference value (reference value can be chosen for the half of supply voltage value, or may be other fixed numbers), can
Obtain the electric current of copper bar type conducting wire to be measured.
The current measuring method of copper bar type conducting wire, can relatively accurately export copper provided by the utility model embodiment
The measurement result of magnetic induction intensity when row's type conducting wire passes to electric current also has preferable frequency characteristic.Specifically refer to embodiment
One.
Above-mentioned steps S202 and S203 can be executed using operational amplifier and its peripheral circuit, as shown in Figure 4 D,
Middle VoVoltage when being powered for copper bar type conducting wire to be measured between first magneto-resistor 41 and the second magneto-resistor 42, VrefIt can be set to
The half of supply voltage value, i.e. Vcc/2.Above-mentioned steps S202 and S203 can also be held using including the module of processor chips
Row, or it is also possible to other electronic circuits to execute, the application is without limitation.
Embodiment three
Fig. 5 A shows the process of the current measuring method of another copper bar type conducting wire according to the utility model embodiment
Figure.As shown in Figure 5A, this method comprises the following steps:
S301: in the longitudinal direction of copper bar type conducting wire longitudinal section shape to be measured, near long side edge first position and
The first magneto-resistor, the second magneto-resistor, third magneto-resistor and the 4th magneto-resistor is arranged in the second position；First position and the second position point
Not Wei Yu longitudinal section shape short side two sides, wherein shown first magneto-resistor and the 4th magneto-resistor are set to first position,
Second magneto-resistor and third magneto-resistor are set to the second position；The longitudinal section shape of copper bar type conducting wire to be measured is rectangle or fillet
Rectangle；First magneto-resistor, the second magneto-resistor, third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are identical, and with long side
Extending direction is parallel；First magneto-resistor and the series connection of the second magneto-resistor, both ends after series connection connect both ends of power, third magneto-resistor and
The series connection of 4th magneto-resistor, the both ends after series connection connect both ends of power, wherein the first magneto-resistor connects same electricity with third magneto-resistor
Source.
S302: 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.
S303: 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.
As shown in Figure 5 B, A indicates the longitudinal cross-section of copper bar type conducting wire to be measured, and "×" expression passes to electric current.X, Y indicates difference
For magnetic sensing unit the first magneto-resistor 51, the second magneto-resistor 52, third magneto-resistor 53, first of the 4th magneto-resistor 54 to be arranged
It sets and the second position, first position, being specifically defined for the second position refers to embodiment one.The area of the embodiment and embodiment one
It is not, the first magneto-resistor 51 and the 4th magneto-resistor 54 are set to first position, and the second magneto-resistor 52 and third magneto-resistor 53 are set
It is placed in the second position, the magnetic susceptibility direction of the first magneto-resistor 51, the second magneto-resistor 52, third magneto-resistor 53, the 4th magneto-resistor 54
Identical (as shown in the arrow in Fig. 5 B), and it is parallel with the direction of long side；As shown in Figure 5 C, the first magneto-resistor 51 and the second magnetic
Resistance 52 is connected, and the both ends after series connection connect both ends of power, and third magneto-resistor 53 and the 4th magneto-resistor 54 are connected, and two after series connection
End connection both ends of power, wherein the first magneto-resistor 51 and third magneto-resistor 53 connect same power end.V- in Fig. 5 C is first
The first voltage value between magneto-resistor 51 and the second magneto-resistor 52, V+ between third magneto-resistor 52 and the 4th magneto-resistor 54
Two voltage values.Due on spatial arrangement, the first magneto-resistor 51 and the 4th magneto-resistor 54 are located at the side of short side, the second magneto-resistor
52 and third magneto-resistor 53 be located at the other side of short side, therefore pass through the first magneto-resistor 51, this branch institute of the second magneto-resistor 52
The result (i.e. to the processing result of the first voltage V- in Fig. 5 C) that measures with by third magneto-resistor 53, the 4th magneto-resistor 54 this
Result measured by one branch (i.e. to the processing result of the second voltage V+ in Fig. 5 C) is on the contrary, its any one numerical value is absolute
Value can be derived by (details are not described herein by the application) by mode described in embodiment two, then according to the first voltage value
The difference of V- and second voltage value V+ handle 2 times that obtained result is the output result of technical solution described in embodiment two.
It can be seen that the present embodiment is compared with embodiment two, anti-interference is stronger.
The current measuring method of copper bar type conducting wire, can relatively accurately export copper provided by the utility model embodiment
The measurement result of magnetic induction intensity when row's type conducting wire passes to electric current also has preferable frequency characteristic.Specifically refer to embodiment
One.
Example IV
The utility model embodiment provides the current measuring method of another copper bar type conducting wire, in embodiment one to three
The difference of any embodiment is, further includes: makes copper bar type conducting wire to be measured and other copper bar type conducting wires being powered along the side of long side
To be arranged side by side.
As shown in Figure 6A, 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. 6 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 or magneto-resistor are (with X in figure
To indicate) it is arranged near long side edge, therefore magnetic sensing unit X and center line OO ' distance d1 are shorter.Therefore, it is passed in magnetic
Feel at unit or magneto-resistor X position, the magnetic induction curve of energization copper bar type conducting wire B is almost in the component for being parallel to longitudinal direction
Zero.And the magnetic susceptibility direction of the magnetic sensing unit on the surface copper bar type conducting wire A to be measured be it is parallel with long side, therefore, when copper to be measured
When row's type conducting wire and other copper bar type conducting wires being powered are arranged side by side along the direction of long side, the magnetic field of adjacent electrified wire will not be right
Measurement result has large effect.
In this regard, inventor has also carried out experimental verification, as shown in Figure 6B, 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. 6 A), the longitudinal axis indicates that adjacent energization is led
Error caused by line influences measurement result.It is with the right side edge that copper bar type conducting wire to be measured is arranged in magnetic sensor unit
Example, curve 1 indicate influence of the adjacent energization copper bar type conducting wire in right side to copper bar type traverse survey result to be measured, and curve 2 indicates
Influence of the adjacent energization copper bar type conducting wire in left side to copper bar type traverse survey result to be measured.It can thus be seen that when magnetic senses
When the right side edge of copper bar type conducting wire to be measured is arranged in device unit, measurement result by the adjacent electrified wire in right side influenced compared with
Greatly, it is influenced by left side smaller；Even if the spacing as low as 3cm of adjacent copper bar type conducting wire, error are also only 2.0% or so, the number
It is confirmed that " adjacent logical when 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 long side
The magnetic field of electric lead will not have large effect to measurement result " this conclusion.Based on this conclusion, copper provided herein
The current measuring method of row's type conducting wire passes through the copper bar type conducting wire for making to be powered and is arranged side by side along the direction of long side, can reduce adjacent
Influence of the electrified wire to measurement result.
Optionally, according to Fig. 6 B, the spacing of adjacent copper bar type conducting wire can be set not less than 3cm.
Embodiment five
The utility model embodiment provides the current measuring method of another copper bar type conducting wire, in embodiment one to four
The difference of any embodiment is, further includes: adjusts the corresponding first position of copper bar type conducting wire to be measured and the second position is located at phase
On the line at two short side midpoints of adjacent energization copper bar type conducting wire.
As shown in Figure 7 A, it is assumed that A is copper bar type conducting wire to be measured, and X indicates be arranged near long side edge, copper bar type to be measured
The corresponding magnetic sensing unit of conducting wire A or magneto-resistor, PP ' are that the energization copper bar type adjacent with the copper bar type conducting wire A to be measured is led
The line at two short side midpoints of line B, the present embodiment design exist the adjustment of the magnetic susceptibility position of magnetic sensing unit or magneto-resistor X
On PP ' line.
Although X is arranged near the long side edge of A, still have between the magnetic susceptibility position of X and the surface of A one section away from
From (even if 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,
The position of magnetic sensing unit or magneto-resistor X are XO point, and the position on the surface A is AO point, then skilled addressee readily understands that this
Magnetic induction intensity at two o'clock position is as shown in Figure 7 B, and wherein solid arrow indicates that magnetic flux density vector, dotted arrow indicate
The component of vector (i.e. in the component and magnetic susceptibility direction vertically-oriented component in magnetic susceptibility direction).It can be seen that from Fig. 7 B
Since XO point is located on PP ' line, the magnetic flux density vector at XO point is vertical with magnetic susceptibility direction, therefore at XO point
Component of the magnetic flux density vector on magnetic susceptibility direction is 0；And due at AO point magnetic flux density vector and magnetic susceptibility side
Magnetic flux density vector to can not intersect vertically, therefore at AO point is inevitable important on magnetic susceptibility direction.Due to setting
The purpose of magnetic sensing unit or magneto-resistor is magnetic field strength of the measurement copper bar type conducting wire to be measured on magnetic susceptibility direction, therefore magnetic passes
The magnetic field strength experienced on the magnetic susceptibility direction of sense unit or magneto-resistor is influenced smaller, measurement by adjacent copper bar type conducting wire
It is as a result more accurate, it can be seen that, it, can be into the position XO by magnetic sensing unit or magneto-resistor setting compared with being arranged in the position AO
One step improves the measuring accuracy of copper bar type conducting wire to be measured.
Embodiment six
The utility model embodiment provides a kind of current measuring device of copper bar type conducting wire, which can be used for executing
Method described in embodiment one or its any one optional embodiment.The device includes the first magnetic sensing unit, the second magnetic
Sensing unit and signal processing module.
First magnetic sensing unit and the second magnetic sensing unit are fixedly installed on copper bar type conducting wire longitudinal cross-section to be measured shape respectively
In the longitudinal direction of shape, nearby first position and the second position, first position and the second position are located at longitudinal direction to long side edge
The two sides of the short side of cross sectional shape；The longitudinal section shape of copper bar type conducting wire to be measured is rectangle or round rectangle.
Signal processing module is used to obtain the difference of the magnetic induction intensity of first position and the second position, and is obtained according to difference
Take the electric current of copper bar type conducting wire to be measured.Specifically refer to Fig. 3 B and embodiment one.
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 which the magnetic sensor unit on PCB is placed on to the long side edge of copper bar type conducting wire longitudinal section shape to be measured
?.
Embodiment seven
The utility model embodiment provides a kind of current measuring device of copper bar type conducting wire, which can be used for executing
Method described in embodiment two or its any one optional embodiment.The device includes the first magneto-resistor, the second magneto-resistor
And signal processing module.
First magneto-resistor, the second magneto-resistor are set in the longitudinal direction of copper bar type conducting wire longitudinal section shape to be measured
Near long side edge, and the position of the first magneto-resistor of setting and the second magneto-resistor is located at the two of the short side of longitudinal section shape
Side；The longitudinal section shape of copper bar type conducting wire to be measured is rectangle or round rectangle；The magnetosensitive of first magneto-resistor and the second magneto-resistor
It is parallel with the extending direction of long side to feel direction, and the first magneto-resistor is identical with the magnetic susceptibility direction of the second magneto-resistor；First magnetic
Resistance and the series connection of the second magneto-resistor, the both ends after series connection are separately connected both ends of power.The input terminal of signal processing module is connected to
Between first magneto-resistor and the second magneto-resistor, for obtaining the voltage value between the first magneto-resistor and the second magneto-resistor, and according to
Voltage value between first magneto-resistor and the second magneto-resistor obtains the electric current of copper bar type conducting wire to be measured.Specifically refer to Fig. 4 B and reality
Apply example two.
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.
Optionally, the positional relationship between magneto-resistor and copper bar type conducting wire to be measured, signal processing are arranged by fixed device
Module can be arranged independently of the fixation device, also can be set on the fixation device.When signal processing module setting is solid
When determining on device, it is provided with pcb board on fixed device, magneto-resistor and signal processing module be set on pcb board, when measurement,
Only need for the magneto-resistor on PCB to be placed on the long side edge of copper bar type conducting wire longitudinal section shape to be measured.
Embodiment eight
The utility model embodiment provides a kind of current measuring device of copper bar type conducting wire, which can be used for executing
Method described in embodiment three or its any one optional embodiment.The device include the first magneto-resistor, the second magneto-resistor,
Third magneto-resistor, the 4th magneto-resistor and signal processing module.
First magneto-resistor, the second magneto-resistor, third magneto-resistor, the 4th magneto-resistor are set to longitudinal in copper bar type conducting wire to be measured
First position and the second position in the longitudinal direction of cross sectional shape, near long side edge；First position and second position difference
Positioned at the two sides of the short side of longitudinal section shape, wherein shown first magneto-resistor and the 4th magneto-resistor are set to the side of short side,
Second magneto-resistor and third magneto-resistor are set to the other side of short side；The longitudinal section shape of copper bar type conducting wire to be measured be rectangle or
Round rectangle；First magneto-resistor, the second magneto-resistor, third magneto-resistor, the magnetic susceptibility direction of the 4th magneto-resistor are identical, and with length
The extending direction on side is parallel；First magneto-resistor and the series connection of the second magneto-resistor, the both ends after series connection connect both ends of power, third magnetoelectricity
Resistance and the series connection of the 4th magneto-resistor, the both ends after series connection connect both ends of power, wherein the first magneto-resistor connects together with third magneto-resistor
One power end.The first input end of signal processing module is connected between the first magneto-resistor and the second magneto-resistor, for obtaining the
The first voltage value between one magneto-resistor and the second magneto-resistor, the second input terminal are connected to third magneto-resistor and the 4th magneto-resistor
Between, for obtaining the second voltage value between third magneto-resistor and the 4th magneto-resistor；Signal processing module is also used to according to
The difference of one voltage value and second voltage value obtains the electric current of copper bar type conducting wire to be measured.Specifically refer to Fig. 5 B 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 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.
Optionally, the positional relationship between magneto-resistor and copper bar type conducting wire to be measured, signal processing are arranged by fixed device
Module can be arranged independently of the fixation device, also can be set on the fixation device.When signal processing module setting is solid
When determining on device, it is provided with pcb board on fixed device, magneto-resistor and signal processing module be set on pcb board, when measurement,
Only need for the magneto-resistor on PCB to be placed on the long side edge of copper bar type conducting wire longitudinal section shape to be measured.
Although being described in conjunction with the accompanying the embodiments of the present invention, those skilled in the art can not depart from this
Various modifications and variations can be made in the case where the spirit and scope of utility model, and such modifications and variations are each fallen within by appended power
Benefit requires within limited range.
Claims (6)
1. a kind of current measuring device of copper bar type conducting wire characterized by comprising
First magnetic sensing unit and the second magnetic sensing unit are fixedly installed on copper bar type conducting wire longitudinal section shape to be measured respectively
In longitudinal direction, nearby first position and the second position, the first position and the second position are located at long side edge
The two sides of the short side of the longitudinal section shape；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or fillet square
Shape；
Signal processing module, the difference of the magnetic induction intensity for obtaining the first position and the second position, and according to
The difference obtains the electric current of the copper bar type conducting wire to be measured.
2. a kind of current measuring device of copper bar type conducting wire characterized by comprising
First magneto-resistor, the second magneto-resistor, the length being set in the longitudinal direction of copper bar type conducting wire longitudinal section shape to be measured
Side adjacent edges, and the position that first magneto-resistor and second magneto-resistor is arranged is located at the longitudinal section shape
Short side two sides；The longitudinal section shape of the copper bar type conducting wire to be measured is rectangle or round rectangle；First magneto-resistor
It is parallel with the extending direction of the long side with the magnetic susceptibility direction of second magneto-resistor, and first magneto-resistor and described
The magnetic susceptibility direction of second magneto-resistor is identical；First magneto-resistor and second magneto-resistor series connection, the both ends point after series connection
It Lian Jie not 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.
3. 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 set to and longitudinally cut in copper bar type conducting wire to be measured
First position and the second position in the longitudinal direction of face shape, near long side edge；The first position and the second
Set the two sides for being located at the short side of the longitudinal section shape, wherein shown first magneto-resistor and the 4th magneto-resistor are set to
The first position, second magneto-resistor and the third magneto-resistor are set to the second position；The copper bar type to be measured
The longitudinal section shape of conducting wire is rectangle or round rectangle；First magneto-resistor, second magneto-resistor, the third magnetoelectricity
Resistance, the magnetic susceptibility direction of the 4th magneto-resistor are identical and parallel with the extending direction of the long side；First magneto-resistor
It connects with second magneto-resistor, the both ends after series connection connect both ends of power, the third magneto-resistor and the 4th magneto-resistor
Series connection, both ends after series connection connect the both ends of power, wherein first magneto-resistor connected with the third magneto-resistor it is same
Power end；
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.
4. the current measuring device of copper bar type conducting wire according to any one of claims 1 to 3, which is characterized in that the letter
Number processing module includes operational amplifier.
5. the current measuring device of copper bar type conducting wire according to any one of claims 1 to 3, which is characterized in that 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.
6. the current measuring device of copper bar type conducting wire according to any one of claims 1 to 3, which is characterized in that it is described to
The magnetic susceptibility position for surveying the corresponding magnetic sensing unit of copper bar type conducting wire is located at two short side midpoints of adjacent energization copper bar type conducting wire
Line on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822007751.2U CN209446649U (en) | 2018-11-30 | 2018-11-30 | The current measuring device of copper bar type conducting wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822007751.2U CN209446649U (en) | 2018-11-30 | 2018-11-30 | The current measuring device of copper bar type conducting wire |
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| Publication Number | Publication Date |
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| CN209446649U true CN209446649U (en) | 2019-09-27 |
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| CN201822007751.2U Withdrawn - After Issue CN209446649U (en) | 2018-11-30 | 2018-11-30 | The current measuring device of copper bar type conducting wire |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374941A (en) * | 2018-11-30 | 2019-02-22 | 无锡乐尔科技有限公司 | The current measuring method and device of copper bar type conducting wire |
| WO2023116277A1 (en) * | 2021-12-21 | 2023-06-29 | 江苏多维科技有限公司 | Current sensor |
-
2018
- 2018-11-30 CN CN201822007751.2U patent/CN209446649U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374941A (en) * | 2018-11-30 | 2019-02-22 | 无锡乐尔科技有限公司 | The current measuring method and device of copper bar type conducting wire |
| CN109374941B (en) * | 2018-11-30 | 2024-07-09 | 宁波希磁电子科技有限公司 | Current measuring method and device for copper bar type lead |
| WO2023116277A1 (en) * | 2021-12-21 | 2023-06-29 | 江苏多维科技有限公司 | Current sensor |
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