CN106872759B - Current path detection device and current path detection method - Google Patents
Current path detection device and current path detection method Download PDFInfo
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- CN106872759B CN106872759B CN201710104450.9A CN201710104450A CN106872759B CN 106872759 B CN106872759 B CN 106872759B CN 201710104450 A CN201710104450 A CN 201710104450A CN 106872759 B CN106872759 B CN 106872759B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The present invention relates to a kind of current path detection device and current path detection methods, including magnetic path, signal output apparatus and signal processing module, magnetic path is equipped with detection platform, detection platform includes Hall plate, detection platform is connect with signal output apparatus, and signal output apparatus is connect with signal processing module；Object to be measured is powered, generate magnetic field, magnetic path controls magnetic field and forms closure magnetic induction line, signal output apparatus applies electric current to Hall plate, signal processing module is used to acquire the output voltage of Hall plate, and analyzes output voltage, obtains the current path of object to be measured, the current path that thus can detecte out object to be measured, without analyzing complicated circuit trace figure, that is, its knowable current path.
Description
Technical field
The present invention relates to technical field of current detection, more particularly to a kind of current path detection device and current path
Detection method.
Background technique
Traditional current test method is roughly divided into two kinds, and one is access types, i.e., ammeter is connected and access closure electricity
Lu Zhong, user judge size of current according to the value in instrument, such as traditional ammeter, it be according to electrical conductor in magnetic field by
The effect of magnetic field force and it is manufactured；Another kind is non-access type, i.e., ammeter does not need in access closed circuit, user
Size of current is judged according to the value in instrument, and if oscilloscope current is popped one's head in, it is according to made of Hall effect principle.
The method of traditional access type and non-access formula measurement electric current, can only measure size of current, the distribution of current path
Situation can only lean on the trace-diagram of hardware to determine, when circuit complexity, bring difficulty to analysis current work situation.
Summary of the invention
Based on this, it is necessary to be asked for what conventional current detection device can not test the distribution of wiring board current path
Topic, providing one kind can be to the current path detection device and current path detection method that wiring board current path is detected.
A kind of current path detection device, including magnetic path, signal output apparatus and signal processing module, magnetism are logical
Road is equipped with detection platform, and detection platform includes the Hall plate for triggering Hall effect；
Detection platform is connect with signal output apparatus, and signal output apparatus is connect with signal processing module；
Object to be measured is powered, and generates magnetic field, and magnetic path controls magnetic field and forms closure magnetic induction line, and signal output apparatus is to suddenly
Your piece applies electric current, output voltage of the signal processing module based on Hall effect acquisition Hall plate, and analyzes output voltage, obtains
The current path of object to be measured.
A kind of current path detection method for current path detection device, comprising steps of
It controls the magnetic field that object to be measured generates and forms closure magnetic induction line；
Electric current is applied to Hall plate, closure magnetic induction line passes through Hall plate；
Based on the output voltage of Hall effect acquisition Hall plate, and output voltage is analyzed, obtains the electric current road of object to be measured
Diameter.
Above-mentioned current path detection device and current path detection method, including magnetic path, signal output apparatus and
Signal processing module, magnetic path are equipped with detection platform, and detection platform includes the Hall plate for triggering Hall effect, and detection is flat
Platform is connect with signal output apparatus, and signal output apparatus is connect with signal processing module；Object to be measured is powered, and generates magnetic field, magnetic
Property access control magnetic field formed closure magnetic induction line, signal output apparatus give Hall plate apply electric current, signal processing module be used for base
In the output voltage of Hall effect acquisition Hall plate, and output voltage is analyzed, obtains the current path of object to be measured, thus may be used
To detect the current path of object to be measured, without analyzing complicated circuit trace figure, that is, its knowable current path.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of current detection means in one embodiment；
Fig. 2 is the endpoint N*N matrix face cell schematics of magnetic path in one embodiment；
Fig. 3 is the flow diagram of electric current detecting method in one embodiment；
Fig. 4 is electrified wire surrounding magnetic field distribution schematic diagram in one embodiment；
Fig. 5 is the structural schematic diagram of current detection means in one embodiment.
Specific embodiment
In one embodiment, as shown in Figure 1, a kind of current path detection device, including magnetic path 100, signal are defeated
Circuit 200 and signal processing module 300 out, magnetic path 100 are equipped with detection platform 400, and detection platform 400 includes for touching
Send out the Hall plate of Hall effect；
Detection platform 400 is connect with signal output apparatus 200, and signal output apparatus 200 and signal processing module 300 connect
It connects；
Object to be measured, which is powered, generates magnetic field, and magnetic path controls magnetic field and forms closure magnetic induction line, and signal output apparatus is to suddenly
Your piece applies electric current, output voltage of the signal processing module based on Hall effect acquisition Hall plate, and analyzes output voltage, obtains
The current path of object to be measured.
Object to be measured refer to arbitrarily can for circuit or electronic component that electric current flows through, such as can for be powered conducting wire,
The printed circuit board of the general purpose board of power-up state, power-up state, it is preferred that object to be measured is circuit under test.After energization, electric current
Flow through object to be measured, generate magnetic field, the magnetic field of electric current, which refers to, generates electric current in closed circuit, when electric current passes through conductor conductor (i.e.
Electric current) around generate a certain range size magnetic field, it is this by electric current generate magnetic field electric current magnetic field.
Magnetic path 100 is equipped with detection platform 400, non-essential, and magnetic path, which is additionally provided with, places the tested of object to be measured
Platform, magnetic path 100 can specifically include magnetic material, magnetic path 100 there are two end, the two ends be distributed in it is to be measured
Two endpoints of the parallel two sides of object, magnetic path are N*N matrix face unit as shown in Figure 2, and the quantity of magnetic path is
Multiple, multiple magnetic paths are distributed at N*N matrix, in order to guarantee that magnetic induction line can as often as possible enter magnetic path, access endpoint
Each unit on matrix face, which can be made, is parallel to object to be measured, can also be made into as required with object to be measured at certain
The inclined-plane or curved surface of angle.Magnetic material refers to ferromagnetic substance, is the very extensive functional material of purposes, and the magnetism of substance
Just recognized and applied by people before 3000, such as ancient Chinese uses native magnet as compass.Modem magnetic
Material has been widely used among our life, such as permanent-magnet material is used as motor, applied to the iron core in transformer
Material, as the magneto-optic disk that memory uses, computer magnetic recording floppy disk etc..It has been generally acknowledged that magnetic material refers to by transition member
Plain sheet, cobalt, nickel and its alloy etc. can directly or indirectly generate magnetic substance, and magnetic material can by the difficulty or ease of degaussing after magnetization
It is divided into soft magnetic material and retentive material.It is easy to remove magnetic substance after magnetization soft magnetic material, it is not easy to degaussing
Substance is retentive material.
Detection platform 400 includes the Hall plate for triggering Hall effect, and more specifically, Hall plate can be metal foil
Piece, Hall element etc., further, the quantity of Hall plate be it is multiple, multiple Hall plates are distributed at N*N matrix, and Hall plate N*N
The unit and magnetic path N*N matrix unit of matrix correspond, and the position of detection platform, which can cut magnetic path to be divided into, appoints
Two sections of meaning ratio.When object to be measured has electric current to pass through, magnetic field is generated where electric current around path, magnetic induction line passes through magnetic logical
Road forms closure magnetic induction line, i.e., size, direction are generated in magnetic tunnel, and with curent change, changing magnetic field, the magnetic field are approximate
Vertically through the Hall plate of detection platform.
Signal output apparatus 200 applies electric current to Hall plate, specifically, each unit of Hall plate N*N matrix is applied
Add identical electric current, due to Hall effect, at this time changes generation with the variation of magnetic field size and Orientation in Hall plate two sides
Voltage acquires the output voltage of each unit of Hall plate.Hall effect refers to, additional vertical with current direction on the semiconductor
Magnetic field, electronics and hole in semiconductor can be made to be assembled in different directions by the Lorentz force of different directions,
Electric field can be generated between the electronics to gather together and hole not reassociate after electric field strength and Lorentz force generate balance, this
When electric field later electrons and holes will be made to be balanced the Lorentz force that magnetic field generates it by the effect of electric field force, make
The electrons and holes obtained later can be passed through and will not be deviated, and the built-in voltage of generation is known as Hall voltage to get Hall plate is arrived
The output voltage of each unit.
Signal processing module 300 is used for the output voltage based on Hall effect acquisition Hall plate, and analyzes output voltage, obtains
To the current path of object to be measured.Specifically, signal processing module 300 arranges output voltage for output voltage matrix array,
The current path of object to be measured is obtained according to output voltage matrix array.More specifically, output voltage is arranged as N*N matrix
Voltage matrix array, the matrix unit of voltage matrix unit and Hall plate corresponds, to each square of voltage matrix array
Array element searches the highest matrix unit of voltage class in voltage matrix array according to predeterminated voltage class letter, connects each
The highest matrix unit of voltage class selects exhausted between adjacency matrix unit in each highest matrix unit line of voltage class
Current path of the line of preset value as object to be measured is less than to value difference value.
Above-mentioned current path detection device, including magnetic path, signal output apparatus and signal processing module, magnetism are logical
Road is equipped with detection platform, and detection platform includes Hall plate, and detection platform is connect with signal output apparatus, signal output apparatus and letter
The connection of number processing module；Object to be measured is powered, and generates magnetic field, and magnetic path controls magnetic field and forms closure magnetic induction line, signal output
Circuit applies electric current, output voltage of the signal processing module based on Hall effect acquisition Hall plate to Hall plate, and analyzes output
Voltage obtains the current path of object to be measured, thus can detecte out the current path of object to be measured, without analyzing complexity
Circuit trace figure, that is, its knowable current path.
In one embodiment, as shown in figure 3, a kind of current path detection method for current path detection device,
Comprising steps of
S100 controls the magnetic field that object to be measured generates and forms closure magnetic induction line.
Object to be measured refer to arbitrarily can for circuit or electronic component that electric current flows through, such as can for be powered conducting wire,
The printed circuit board of the general purpose board of power-up state, power-up state.After energization, electric current flows through object to be measured, generates magnetic field, electric current
Magnetic field refer to and generate electric current in closed circuit, a certain range size is generated when electric current passes through conductor around conductor (i.e. electric current)
Magnetic field, magnetic field of this magnetic field generated by electric current electric current.It is generated specifically, object to be measured can be controlled by magnetic path
Magnetic field form closure magnetic induction line, the quantity of magnetic path be it is multiple, multiple magnetic paths are distributed at N*N matrix.
S200 applies electric current to Hall plate, and closure magnetic induction line passes through Hall plate.
Apply electric current to Hall plate, due to Hall effect, will generate in Hall plate two sides with magnetic field size and Orientation at this time
The voltage of variation and variation, acquires the output voltage of Hall plate.Hall effect refers to, additional on the semiconductor to hang down with current direction
Straight magnetic field can make electronics and hole in semiconductor be assembled in different directions by the Lorentz force of different directions,
Electric field can be generated between the electronics and hole to gather together not reassociate after electric field strength and Lorentz force generate balance,
Electric field will make later electrons and holes be balanced the Lorentz force that magnetic field generates it by the effect of electric field force at this time,
Later electrons and holes, which are passed through, to be deviated, and the built-in voltage of generation is known as Hall voltage to get Hall is arrived
The output voltage of piece.Non-essential, the quantity of Hall plate is multiple, and multiple Hall plates are distributed at N*N matrix, and Hall plate N*
The unit of N matrix and the unit of magnetic path N*N matrix correspond.
S300 based on the output voltage of Hall effect acquisition Hall plate, and analyzes output voltage, obtains the electricity of object to be measured
Flow path.
Specifically, arranging the output voltage of Hall plate for voltage matrix array, further according to voltage matrix array, obtain to
Survey the current path of object.More specifically, the output voltage of Hall plate is arranged the voltage matrix array for N*N matrix, voltage
The matrix unit of matrix array and the matrix unit of Hall plate correspond, to each matrix unit of voltage matrix array according to pre-
If voltage class identifies, the highest matrix unit of voltage class in voltage matrix array is searched, each voltage class highest is connected
Matrix unit select in each highest matrix unit line of voltage class that absolute value differences are less than between adjacency matrix unit
Current path of the line of preset value as object to be measured.
The object to be measured of above-mentioned current path detection method, energization generates magnetic field, controls the magnetic field and forms closure magnetic induction line,
And magnetic induction line is closed by Hall plate, is applied electric current to Hall plate, is based on Hall effect, acquires the output voltage of Hall plate,
The output voltage is analyzed, the current path of object to be measured is obtained, thus can detecte out the electric current road of object to be measured
Diameter, without analyzing complicated circuit trace figure, that is, its knowable current path.
In one embodiment, as shown in figure 4, being electrified wire surrounding magnetic field distribution schematic diagram, electrified wire generates magnetic
, the closure magnetic induction line that magnetic field is formed through magnetic path can surround this electrified wire, and conducting wire only has the magnetic induction line of side can be into
Enter magnetic path, generates Hall voltage；In addition, electric current may there are two directions in electrified wire, so obtained data are because of electricity
It flows direction difference and positive value or negative value is presented, and closer to the position of conducting wire, absolute value of voltage is bigger.To output voltage into
When row analysis, as long as finding positive voltage or negative voltage absolute value is apparently higher than neighbouring other units and absolute value is presented and is monotonically changed
Unit combination, so that it may determine the path of electric current；Obtained absolute value of voltage size and the direct phase of current in wire size
It closes, and when current in wire direction difference, the positive and negative polarity of the maximum unit of absolute value of voltage is different, therefore available
Sense of current and its size.In depicted area, to each matrix unit of output voltage matrix array according to predeterminated voltage
Class letter, for example matrix unit "-" is identified into first voltage grade negative voltage, " -- " mark second voltage grade negative electricity
Pressure, " --- " mark tertiary voltage grade negative voltage, the absolute value of first voltage grade negative voltage are less than second voltage grade negative electricity
The absolute value of pressure, the absolute value of second voltage grade negative voltage are less than the absolute value of tertiary voltage grade negative voltage, search output
The highest matrix unit of voltage class in voltage matrix array connects the highest matrix unit of each voltage class and selects each electricity
Absolute value differences are less than the line of preset value as to be measured between adjacency matrix unit in the pressure highest matrix unit line of grade
The current path of object.Specifically, when the line between two highest matrix units of voltage class is needed across other voltages
When the matrix unit of grade, select the lesser matrix unit of adjacent and between the absolute value of highest voltage level difference as
The intermediate connection matrix unit of the matrix unit of two highest voltage levels.According to mentioned above principle, current path curve can be obtained
D1, D2, D1, D2 pass through voltage most value cell, form a full curve, and as path where this current in wire, voltage is exhausted
It is directly related with size of current to being worth.As magnetic path bending direction in detection device it is known that magnetic induction line packet where access
Current path is enclosed, according to Ampere's law, it is possible to determine that current direction.Current path direction where D1 as shown in the figure is downward, then
D2 in contrast, upwards.So current path, direction and size can be analyzed by output voltage.
In one embodiment, a kind of electricity for capableing of current path distribution situation in one regional scope of disposable test
Flow path detection device, Fig. 5 are its basic block diagram, mainly include following component part: tested plane, magnetic path and access
Terminal, detection plane and signal output apparatus, Data Analysis Services and insulation processing part.
Tested plane A, type can be the conducting wire being powered, the general purpose board of power-up state, power-up state than wide
Printed circuit board.
Access terminal C and magnetic path, magnetic path are magnetic material, it is there are two end, i.e. two paths terminal, this two
A end is distributed in the two sides parallel with tested plane, and access terminal is N*N matrix unit, the number of passages and matrix of magnetic path
Face unit number is identical.In order to guarantee that magnetic induction line can as often as possible enter in magnetic path, each list on access terminal matrix face
Different establish a capital of member is configured parallel to tested plane, can be made the inclined-plane or curved surface to form an angle with tested plane.
Plane B and signal output apparatus are detected, detection plane includes sheet metal array, the metal being distributed in N*N matrix
The matrix unit number of thin slice is identical as magnetic tunnel matrix unit number, and corresponds, which, which cuts magnetic path, divides,
The working principle of the part is as follows:
(a) when tested plane has current path and has electric current to pass through, magnetic field, magnetic induction line are generated around path where electric current
By magnetic tunnel formed closed curve, i.e., in magnetic tunnel generate direction, size with curent change changing magnetic field, should
Magnetic field near normal passes through the sheet metal array in detection plane；
(b) signal output apparatus leads to the electric current of same size to each unit of sheet metal array, due to Hall
Effect will generate the voltage for changing with magnetic field size and Orientation and changing in thin slice two sides at this time；
(c) each cell voltage output channel of the sheet metal matrix array in signal output apparatus control detection plane
Folding, guarantee one the moment only one unit voltage value be output on a signal amplification circuit, when signal amplify electricity
It when number amount is greater than 1, needs to guarantee that each signal amplification circuit parameters are consistent as far as possible, and guarantees input voltage simultaneously by more
Newly, the signal of amplification is then input to analog-digital converter, is converted into digital signal, when the voltage of all units is all converted to
After digital signal, that is, complete the current signal acquisition of a frame.
Digital Signal Processing analyzes a frame data of acquisition, and it is 2-D data battle array that a frame data, which are similar to image data,
Column are N*N matrix.Each of one frame data all represent the magnetic field sizes values of respective magnetic access, also represent indirectly by
Survey size of current in plane.Magnetic field can be generated around electrified wire, in conducting wire when current direction difference, magnetic direction is different；From
Conducting wire more far field is weaker, according to several basic theories, the size of path and electric current where electric current can be analyzed.
Insulation processing, due to some areas because contact may short circuit, need to carry out insulation processing, for example, access terminal with
Tested plane, between the different accesses of magnetic path, magnetic path and detection plane etc..
The array that the current sense end of the current path detection device is lined up using multiple-unit, double-sided magnetic substance, reaches
Electric current face battle array measurement effect；In the array that multiple-unit, double-sided magnetic substance are lined up, the unit for lining up array is opposite with magnetic path
It answers, while one on corresponding sheet metal array has the sheet metal that electric current passes through；Based on Hall effect principle, metal is reached
All magnetic fields on wafer array are converted into voltage, the voltage by it is sequentially single or it is multiple simultaneously be input to amplifying circuit, most
Arriving analog-digital converter afterwards becomes digital signal；When analyzing signal, as long as finding positive voltage or negative voltage absolute value is bright
It is aobvious to be higher than the unit combination for having side that absolute value monotone variation is presented at neighbouring other units and highest unit, so that it may which that determination is led
Thread path；Most value polarity can determine current direction, and most value size is directly related with size of current.The current path detection device
Size of current can only be measured by compensating for conventional current measuring technology, when multichannel electric current to be carried out is tested simultaneously, can only be added more
A TCH test channel or equipment waste test resource, and cannot measure the defect of current path distribution situation.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of current path detection device, which is characterized in that including magnetic path, signal output apparatus and signal processing mould
Block, the magnetic path are equipped with detection platform, and the detection platform includes the Hall plate for triggering Hall effect；
The detection platform is connect with the signal output apparatus, and the signal output apparatus and the signal processing module connect
It connects；
Object to be measured, which is powered, generates magnetic field, and magnetic path controls the magnetic field and forms closure magnetic induction line, the signal output apparatus
Apply electric current to the Hall plate, the signal processing module acquires the output voltage of the Hall plate based on Hall effect, and
The output voltage is analyzed, the current path of the object to be measured is obtained；
The signal processing module is also used to arrange the output voltage as voltage matrix array, according to the voltage matrix battle array
Column obtain the current path of the object to be measured.
2. current path detection device according to claim 1, which is characterized in that the signal processing module be also used to by
It is voltage matrix array that the output voltage, which arranges, to each matrix unit of the voltage matrix array according to predeterminated voltage grade
Mark searches the highest matrix unit of voltage class in the voltage matrix array, and it is highest to connect each voltage class
Matrix unit chooses in each highest matrix unit line of voltage class absolute difference between two neighboring unit
The line that value is less than preset value characterizes the current path of the object to be measured.
3. current path detection device according to claim 1, which is characterized in that the quantity of the magnetic path is more
It is a, and multiple magnetic paths are arranged at N*N matrix.
4. current path detection device according to claim 3, which is characterized in that the quantity of the Hall plate be it is multiple,
And multiple Hall plates are arranged at N*N matrix, and the matrix unit of the matrix unit of the Hall plate and the magnetic path
It corresponds.
5. current path detection device according to claim 1, which is characterized in that the magnetic path, which is additionally provided with, places institute
State the tested platform of object to be measured.
6. a kind of current path detection method of current path detection device according to claim 1-5, special
Sign is, comprising steps of
It controls the magnetic field that object to be measured generates and forms closure magnetic induction line；
Electric current is applied to Hall plate, the closure magnetic induction line passes through the Hall plate；
The output voltage of the Hall plate is acquired based on Hall effect, and analyzes the output voltage, obtains the object to be measured
Current path；
The output voltage of the acquisition Hall plate, and the output voltage is analyzed, obtain the electric current road of the object to be measured
The step of diameter includes:
The output voltage of the Hall plate is arranged as voltage matrix array；
According to the voltage matrix array, the current path of the object to be measured is obtained.
7. current path detection method according to claim 6, which is characterized in that the output of the acquisition Hall plate
Voltage, and the step of analyzing the output voltage, obtaining the current path of the object to be measured includes:
The output voltage of the Hall plate is arranged for voltage matrix array, and to each matrix unit of the voltage matrix array
According to predeterminated voltage class letter；
The highest matrix unit of voltage class in the voltage matrix array is searched, each highest square of voltage class is connected
Array element chooses in each highest matrix unit line of voltage class absolute value differences between two neighboring unit
Less than the current path that the line of preset value characterizes the object to be measured.
8. current path detection method according to claim 6, which is characterized in that control object to be measured by magnetic path
The magnetic field of generation forms closure magnetic induction line.
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