CN107728093A - One kind is used for fluxgate magnetic core device for detecting performance and method - Google Patents
One kind is used for fluxgate magnetic core device for detecting performance and method Download PDFInfo
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- CN107728093A CN107728093A CN201710939994.7A CN201710939994A CN107728093A CN 107728093 A CN107728093 A CN 107728093A CN 201710939994 A CN201710939994 A CN 201710939994A CN 107728093 A CN107728093 A CN 107728093A
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- magnetic core
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- shielding cylinder
- fluxgate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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Abstract
This application provides a kind of fluxgate magnetic core device for detecting performance and method, the detection means includes：Shielding cylinder, for shielding the signal of external magnetic field, null field environment is formed in shielding cylinder；Rotary unit, for providing rotary power for detection platform；Detection platform, for installing magnetic core to be measured；Circuit module, for pathway for electrical signals to be powered and provided for rotary unit and detection platform；Supporting structure, for being provided the structural support for whole fluxgate magnetic core detection means.Present invention also provides a kind of method using above-mentioned fluxgate magnetic core device for detecting performance detection magnetic core performance.The application realizes the detection to magnetic core performance before fluxgate sensor assembling, adds yield rate, reduces the waste of resource.
Description
Technical field
The application is related to flux-gate magnetometer manufacturing field, more particularly to a kind of fluxgate sensor magnetic core performance detection dress
Put and method.
Background technology
Flux-gate magnetometer is the saturated characteristic sensitivity external magnetic field signal using soft magnetic materials, in low noise sonic transducer extensively
Using permalloy, non-crystaline amorphous metal soft magnetic materials, the Barkhausen noise of selected soft magnetic materials finally determines the spirit of sensor
The limit of sensitivity and precision, soft magnetic materials heat treatment after noise, null field skew, bias stability, material uniformity and together
Matter, the performance that sensor will be influenceed on parameter characteristics such as the insensitivities of transverse field.
For fluxgate core structure to be divided into bar-shaped, racetrack and annular three class formation forms, wherein annular is high-precision magnetic
The first choice of flux-gate magnetometer, the performance quality for the toroidal core that soft magnetic materials is formed directly affect the property of flux-gate magnetometer
Energy, it is the core of whole magnetometer.
In the prior art, survey magnetic core performance to be difficult to detect before fluxgate sensor assembling, but pass through fluxgate magnetic strength
The demarcation and final performance index for counting the later stage are assessed magnetic core performance, so cause waste product and the defect ware higher.Magnetic
Open gate sensor assembles complex process, and assembling cycle length, the finished product screening ratio of external this high-precision sensor is 20：1.Cause
This, if before assembling not to cores measunng, yield rate is very low, wastes substantial amounts of resource.
The content of the invention
One of technical problem that the application solves be by provide a kind of device for fluxgate magnetic core performance detection with
Method, realize the test to magnetic core performance before fluxgate assembling.
According to one embodiment of the application one side, there is provided a kind of device for fluxgate magnetic core performance detection,
Including：
Shielding cylinder, the shielding cylinder are cylinder, and sandwich construction, every layer has upper lid, and the multilayer screen cylinder is fixed on
On supporting structure, for shielding the signal of external magnetic field, null field environment is formed in shielding cylinder, the material of the shielding cylinder is slope
Not alloy；
Rotary unit, it is fixed on supporting structure, including motor and rotary shaft, and pass through rotary shaft and detection platform phase
Even, for providing rotary power for detection platform；
Detection platform, is fixed in the rotary shaft in shielding cylinder, there is multigroup tool mechanism in detection platform, is treated for installing
Magnetic core is surveyed, the material of the detection platform is aluminium alloy.
Circuit module, including excitation module, detection module and control module.For being powered for rotary unit and detection platform
And pathway for electrical signals is provided, can acquisition testing platform induced signal, while can be communicated with host computer.
Supporting structure, it is connected with shielding cylinder, rotary unit and circuit module, for for whole fluxgate magnetic core detection means
Provide the structural support.
Preferably, the magnetic core detection means also includes the computer installation that is connected with the circuit module, for electricity
Road module sends instruction.
Preferably, the motor of the rotary unit is connected by change-speed gearing group with rotary shaft, the change-speed gearing group
Transmission range is adjustable.
Preferably, the detection platform can install multiple magnetic cores to be measured.
According to one embodiment of the application another aspect, there is provided detect fluxgate magnetic core performance using said apparatus
Method, including：
(1) magnetic core to be measured is fixed in detection platform；
(2) the upper lid of shielding cylinder is covered, it is ensured that shielding cylinder surrounding completely encloses；
(3) start-up circuit module, alternating excitation electric current is inputted；
(4) circuit module is adjusted so that magnetic core to be measured periodically reaches optimal saturation state.
Preferably, the method for testing can once test multiple magnetic cores to be measured.
Preferably, after start-up circuit module, continue to start rotary unit, drive magnetic core to be measured around rotary shaft uniform rotation.
The embodiment of the present application utilizes fluxgate magnetic core device for detecting performance, just can be to magnetic before fluxgate sensor assembling
Core performance is tested, and solves the problems, such as that yield rate caused by re-test is low after assembling, the wasting of resources is more.Structure is assembled
Complexity, three high axle concentric structure Magnetic Sensors of technology difficulty are especially suitable.It can reduce high accuracy three significantly using the technology
The lead time of axle concentric structure Magnetic Sensor and development cost, improve yield.
Although those of ordinary skill in the art will be appreciated that following detailed description carries out referenced in schematic embodiment, accompanying drawing,
But the application is not limited in these embodiments.But scope of the present application is extensive, and it is intended to be bound only by appended right
It is required that limit scope of the present application.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 is the fluxgate magnetic core device for detecting performance structural representation according to the application one embodiment.
Fig. 2 is the flow chart according to the fluxgate magnetic core method for testing performance of the application one embodiment.
Same or analogous reference represents same or analogous part in accompanying drawing.
Embodiment
The technical scheme of the application is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the fluxgate magnetic core device for detecting performance structural representation according to the application one embodiment.The application is real
Applying the fluxgate magnetic core device for detecting performance of example can detect before sensor assembling to fluxgate magnetic core performance, detection dress
Put including：Shielding cylinder, rotary unit, detection platform, circuit module, supporting structure.
Wherein, supporting structure is the frame structure that can independently support, and in one embodiment, the supporting structure includes bottom
Seat, side frame and upper frame；The shielding cylinder is fixedly mounted on supporting structure, and in one embodiment, the shielding cylinder is arranged on
On the base of direct organization；The rotary unit is arranged on supporting structure, in one embodiment, the rotary unit installation
On the upper frame of supporting structure；The rotary unit includes a rotary shaft, and the rotary shaft stretches into shielding cylinder in vertical direction
It is interior；The detection platform is fixed in the rotary shaft in shielding cylinder.
In one embodiment, the fluxgate magnetic core device for detecting performance also includes the meter being connected with the circuit module
Calculation machine device.Upper computer software is installed, tester can pass through upper computer software and the circuit on the computer installation
Module is communicated, and is instructed for example, being sent to circuit module, adjusts the adjustable parameter of circuit module, or regulation exciting current
Size.The computer installation can also receive the information from circuit module and storage.By being compiled in upper computer software
Autotest program is write, the fluxgate magnetic core device for detecting performance can also be upgraded to automatic testing equipment, lifting test
Efficiency.
Shielding cylinder, the shielding cylinder are cylinder, there is upper lid.In one embodiment, the upper lid center is provided with hole, institute
The diameter for stating hole is not less than the external diameter of rotary unit rotary shaft.It can be brought into close contact between the upper lid and shielding cylinder side wall, in one kind
In embodiment, bayonet unit is provided between the upper lid and shielding cylinder side wall, in testing, it is ensured that upper lid is close with side wall
Fitting.
In order to effectively shield the signal of external magnetic field, null field environment is formed in shielding cylinder, the shielding cylinder is multilayer knot
Structure, such as in one embodiment, the shielding cylinder is double-decker, can also make in other embodiments three-decker or
More than three layers of structure, it is preferred that the shielding cylinder is five-layer structure, and inventor is by experimental verification, when shielding cylinder is five layers
During structure, complete null field can be reached in cylinder.
In order to increase the magnetic shield performance of shielding cylinder, the material of the shielding cylinder can be permalloy, dilval etc.
Soft magnetic materials with high magnetic permeability, preferably permalloy.Further, the composition proportion of the permalloy is：Molybdenum
1-3%, nickel 70-90%.
Further, in order to reduce influence that thermal stress brings to test result, it is necessary to consider shielding cylinder and detection platform
Matched coefficients of thermal expansion, it is therefore preferable that the material of shielding cylinder is aluminum alloy materials.
In one embodiment, the shielding cylinder is sandwich construction, and inner layer material is the preferable aluminium alloy of hot property, other
Cladding material is the more preferable permalloy of magnetic shield performance, has thus taken into account the hot property and magnetic shield performance of shielding bucket.
The diameter dimension scope of the shielding cylinder isCan according to supporting structure size selection,
Preferably
Rotary unit, it is fixed on supporting structure, including motor and rotary shaft, and pass through rotary shaft and detection platform phase
Even, for providing rotary power for detection platform.
In one embodiment, the rotary unit is fixed on the upper lid of the shielding cylinder, and can be rotated with upper cover rim
Direction of principal axis moves up and down.
The motor of the rotary unit is connected by change-speed gearing group with rotary shaft, the transmission range of the change-speed gearing group
It is adjustable.According to the actual requirements different gears can be selected to adjust rotary shaft rotating speed during test.
In one embodiment, the motor is the adjustable stepper motor of rotating speed, the stepper motor and circuit module phase
Even, tester can realize automatic survey by the upper computer software controlled motor rotating speed in computer installation and start-stop time
Examination.
In order to reduce the influence that motor is brought to test result, in one embodiment, the motor is low magnetic machines.
Detection platform, it is fixed in the rotary shaft in shielding cylinder, for installing magnetic core to be measured.
The detection platform is fully located in shielding cylinder, in shielding cylinder in the embodiment of multilayer, detection platform is positioned at most
The inside of inner side shielding cylinder, and can be completely enclosed by the upper lid of shielding cylinder.
In one embodiment, consolidated in order to facilitate the dismounting of detection platform, the detection platform with rotary shaft by screw
It is fixed, it is preferred that all screws are all no magnetic in the detection platform.
The detection platform also includes test fixture, and for placing magnetic core to be measured, the quantity of the test fixture can be
It is multiple.Each test fixture is respectively set on orthogonal three directions.In one embodiment, the detection platform
Test fixture with two group of three durection component, 6 magnetic cores to be measured can be tested simultaneously.
In one embodiment, induction coil and test coil are provided with outside the frock.Induction coil is used to connect
The signal containing external magnetic field information is received, test coil is used to produce given external magnetic field.The external magnetic field can be by computer
Device is set by circuit module.
The detection platform also has the electrical interface for induction coil, test coil and circuit module communication, described
Electrical interface is multichannel, can be with simultaneous transmission multiple signals.
The material that detection platform described in magnetic disturbance is reduced in view of test process is non-magnetic material, preferably aluminium.Enter
One step is considered to reduce the influence that thermal stress brings test result, the material of detection platform described in one embodiment of the present of invention
It is aluminium alloy.
Circuit module, for pathway for electrical signals to be powered and provided for rotary unit and detection platform.
The circuit module can include excitation module, detection module and control module.It can be to treat wherein to encourage module
Survey magnetic core and exciting current is provided, detection module can detect magnetic core output voltage, and control module can control whole circuit module
Parameters, such as the size of exciting current can be adjusted.In one embodiment, the circuit module and computer installation
It is connected, and can be by computer installation come control circuit module, and adjust circuit parameter.The information that circuit module collects,
Computer installation can be transferred to be further processed or store.In other embodiments, the circuit module also includes sensing
Module, signal acquisition module and data communication interface modules.
In one embodiment, in order to test and conveniently moving, the circuit module are fixed on supporting structure, for example, it is solid
It is scheduled on the upper frame of supporting structure.In other embodiments, the circuit module can not also be fixed on the magnetic core detection dress
Put, and be only connected by electric wire with the detection means.
In the embodiment that the circuit module is fixed on supporting structure, the circuit module must be fixed to shielding
In structure beyond cylinder, it is connected by electric wire with the magnetic core to be measured in shielding cylinder.
Supporting structure, it is connected with shielding cylinder, rotary unit and circuit module, for for whole fluxgate magnetic core detection means
Provide the structural support.
In one embodiment, mobile for convenience, the bottom of the supporting structure is provided with universal wheel, in other implementations
In example, the supporting structure can also be directly placed on the ground, its bottom level, it is ensured that total consolidates.
In order to facilitate installation other assemblies, multiple screw holes are additionally provided with the supporting structure.
The material of the supporting structure is that intensity is big, and non-magnetic aluminium alloy.
Tested before can realizing the assembling to magnetic core by using the device of above-mentioned detection fluxgate magnetic core performance, further
, after computer installation is connected, the detection means is also scalable into automatic detection device, greatly improves detection efficiency.
The embodiment of the present application also provides a kind of method that fluxgate magnetic core performance is detected using above-mentioned detection device.Such as figure
2 show the flow chart of the detection method, and this method mainly comprises the following steps S01~S04：
Magnetic core to be measured is fixed in detection platform by S01.
According to testing requirement, multiple magnetic cores to be measured can be installed simultaneously, it is preferred that the magnetic core to be measured is according to different sides
To being separately fixed in the different frocks in detection platform.And determine to firmly install, when rotary shaft is tested, ensure magnetic to be measured
Core will not loosen and rock.
S02 covers the upper lid of shielding cylinder, it is ensured that shielding cylinder surrounding completely encloses.
After installing magnetic core to be measured, cover and covered on shielding cylinder so that detection platform is in the null field ring built by shielding cylinder
Border.
S03 start-up circuit modules, input the exciting current of alternation.
Circuit module can be manually booted, can also be inputted by computer installation start-up circuit module, and to magnetic core to be measured
Initial exciting current.In test process, rotary unit can be started as needed, and adjust rotary unit rotating speed, rotation is single
Member drives magnetic core to be measured around rotary shaft uniform rotation.
S04 adjusts circuit module so that magnetic core reaches optimal saturation state.
Adjust circuit module parameter, such as regulation exciting current size so that magnetic core reaches optimal saturation state, records this
When exciting current size.
Methods described is used for the Magnetic Sensor for testing three axle concentric structures.
The embodiment of the present application just can by using the method for above-mentioned detection magnetic core performance before fluxgate sensor assembling
Magnetic core performance is tested, solves the problems, such as that yield rate caused by re-test is low after assembling, the wasting of resources is more.To structure
Assembling is complicated, and three high axle concentric structure Magnetic Sensors of technology difficulty are especially suitable.It can be reduced significantly using the technology high-precision
Lead time and the development cost of three axle concentric structure Magnetic Sensors are spent, improves yield.
It is obvious to a person skilled in the art that the application is not limited to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit herein or essential characteristic, the application can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present application is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the application.Any reference in claim should not be considered as to the involved claim of limitation.This
Outside, it is clear that the word of " comprising " one is not excluded for other units or step, and odd number is not excluded for plural number.That is stated in system claims is multiple
Unit or device can also be realized by a unit or device by software or hardware.The first, the second grade word is used for table
Show title, and be not offered as any specific order.
Claims (7)
- A kind of 1. device for fluxgate magnetic core performance detection, it is characterised in that including：Shielding cylinder, sandwich construction, there is upper lid per Rotating fields, the multilayer screen cylinder is fixed on supporting structure, for shielding The signal of external magnetic field, null field environment is formed in shielding cylinder, the material of the shielding cylinder is permalloy；Rotary unit, it is fixed on supporting structure, including motor and rotary shaft, and be connected by rotary shaft with detection platform, use In providing rotary power for detection platform；Detection platform, it is fixed in the rotary shaft in shielding cylinder, for installing magnetic core to be measured, the material of the detection platform is aluminium Alloy；Circuit module, for pathway for electrical signals to be powered and provided for rotary unit and detection platform；Supporting structure, it is connected with shielding cylinder, rotary unit and electronic box, for providing branch for whole fluxgate magnetic core detection means Support structure.
- 2. the device of fluxgate magnetic core detection as claimed in claim 1, it is characterised in that the device of the magnetic core detection also wraps The computer installation being connected with the circuit module is included, is instructed for being sent to circuit module.
- 3. the device of fluxgate magnetic core detection as claimed in claim 1, it is characterised in that the motor of the rotary unit passes through Change-speed gearing group is connected with rotary shaft, and the transmission range of the change-speed gearing group is adjustable.
- 4. the device of fluxgate magnetic core detection as claimed in claim 1, it is characterised in that the detection platform can be installed more Individual magnetic core to be measured.
- 5. a kind of detect the method for fluxgate magnetic core performance using any one described device of Claims 1-4 4, its feature exists In comprising the following steps：(1) magnetic core to be measured is fixed in detection platform；(2) the upper lid of shielding cylinder is covered, it is ensured that shielding cylinder surrounding completely encloses；(3) start-up circuit module, alternating excitation electric current is inputted；(4) circuit module parameter is adjusted so that magnetic core periodically reaches optimal saturation state.
- 6. the method for detection fluxgate magnetic core performance as claimed in claim 5, it is characterised in that once test can be tested multiple Magnetic core to be measured.
- 7. the method for detection fluxgate magnetic core performance as claimed in claim 5, it is characterised in that after start-up circuit module, control Rotary unit processed starts, and drives magnetic core to be measured around rotary shaft uniform rotation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710939994.7A CN107728093A (en) | 2017-10-11 | 2017-10-11 | One kind is used for fluxgate magnetic core device for detecting performance and method |
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| CN201710939994.7A CN107728093A (en) | 2017-10-11 | 2017-10-11 | One kind is used for fluxgate magnetic core device for detecting performance and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112748377A (en) * | 2020-12-16 | 2021-05-04 | 中国船舶重工集团有限公司第七一0研究所 | Satellite-borne induction type magnetometer field calibration device |
| CN113866692A (en) * | 2021-10-26 | 2021-12-31 | 北京卫星环境工程研究所 | Extremely weak remanence measurement system and measurement method for spacecraft component |
| CN115877286A (en) * | 2023-03-03 | 2023-03-31 | 中国地震局地球物理研究所 | System and method for testing noise characteristics of soft magnetic material of fluxgate sensor |
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| CN115877286B (en) * | 2023-03-03 | 2023-10-20 | 中国地震局地球物理研究所 | System and method for testing noise characteristics of soft magnetic material of fluxgate sensor |
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