CN107121710A - Test fixture and the method that geomagnetic sensor is calibrated by test fixture - Google Patents
Test fixture and the method that geomagnetic sensor is calibrated by test fixture Download PDFInfo
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- CN107121710A CN107121710A CN201710322732.6A CN201710322732A CN107121710A CN 107121710 A CN107121710 A CN 107121710A CN 201710322732 A CN201710322732 A CN 201710322732A CN 107121710 A CN107121710 A CN 107121710A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V13/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups G01V1/00 – G01V11/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
A kind of method that the geomagnetic sensor of workpiece for measurement is calibrated the invention discloses test fixture and by the test fixture.The test fixture includes substrate, the rotary components being fixed on substrate and the test platform for being connected to the rotary components, the test platform clamps workpiece for measurement, the rotary components are tested to drive the test platform to rotate so that correspondence correspondence drives the workpiece for measurement on the test platform to rotate to different heeling conditions.The test fixture and calibration method of the present invention, the more existing test fixture for being only capable of fixing workpiece for measurement in single specific plane, workpiece for measurement can be tilted into different conditions by rotary components to be tested, calibration is realized to obtain the related data of geomagnetic sensor under the different conditions.
Description
Technical field
The multiple different test parameters of workpiece for measurement can be met the present invention relates to testing for electrical equipment field, more particularly to one kind
It is required that test fixture and by the test fixture come the method to workpiece alignment geomagnetic sensor to be measured.
Background technology
Geomagnetic sensor is the key component of data collecting system, the accuracy of the performance of sensor to data collecting system
Play a decisive role.There is part to realize that magnetic field data is gathered by geomagnetic sensor on the market at present, and in simulating chamber
The technology of positioning, although this kind of technology cost is low, and is easily achieved, and is difficult to substantial amounts of popularization and application in industrial test.
Particularly due to：Metal device is all there is in mobile phone, tablet personal computer or other electronic equipments, this can cause geomagnetic sensor simultaneously
The non-intensity that earth's magnetic field is tested under definitely noiseless environment, for example electronic equipment is in flat condition and test under state of placing vertically
Geomagnetic field intensity out has difference.Therefore, if first gone electronic equipment after collection Magnetic Field with the mode kept flat, then will
The relatively low situation of the degree of accuracy just occurs with placing vertically or other inclined modes are gone to test or positioned in electronic equipment.
Existing test fixture is generally only capable of the electronic equipments such as mobile phone being fixed in single specific plane, such as horizontal plane
Or vertical plane, to carry out follow-up production and processing, assembling or test.However, when electronic equipment is placed under different postures
Test when tilt to different states, it is necessary to which electronic equipment is rotated (a such as inclined-plane tilted to any unspecific
Angle) when being tested, then larger position error can be produced, geomagnetic sensor position fixing process indoors can be so reduced
In usage experience.Therefore, existing test fixture will be difficult to meet and require.
The content of the invention
The embodiment of the present invention provides a kind of test fixture, and it can drive the workpiece for measurement on test platform by rotary components
Rotation can meet workpiece for measurement and obtain multiple different test parameter requirements, improve the use body of user to different heeling conditions
Test.
In a first aspect, the embodiments of the invention provide a kind of test fixture, including substrate, the rotation group that is fixed on substrate
Part and the test platform being connected in the rotary components, the test platform is to clamp workpiece for measurement, the rotation group
Part is tilted to drive the test platform to rotate so that correspondence drives the workpiece for measurement on the test platform to rotate to different
State is tested.
On the other hand, the present invention also provides a kind of method for calibrating electromagnetic sensor, and this method comprises the following steps：
Obtain absolute force initial value of the workpiece for measurement under initial level state；
Obtain the oneself state value of the workpiece for measurement respectively under different heeling conditions and absolute force value；
Determine the absolute force value under the different heeling conditions and the offset of absolute force initial value；
Workpiece for measurement is calibrated with offset according to the oneself state value under the different heeling conditions.
In summary, above-described embodiment is provided test fixture and school is carried out to workpiece for measurement by the test fixture
The method of quasi- geomagnetic sensor, is driven the workpiece for measurement on test platform to rotate to different heeling conditions by rotary components, supplied
Workpiece for measurement obtain under multiple different tilted shape states with the absolute force offset under initial level state, and according to it is current from
Body heeling condition matches corresponding absolute force offset and compensated, so as to realize the calibration to absolute force.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the three-dimensional assembling schematic diagram of test fixture of the present invention.
Fig. 2 is the schematic perspective view of the test platform in test fixture shown in Fig. 1.
Fig. 3 is the method flow diagram for the geomagnetic sensor that workpiece for measurement is calibrated using test fixture shown in Fig. 1.
Fig. 4 is the application method flow chart of test fixture shown in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is carried out clear
Chu, it is fully described by.Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment party
Formula.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained on the premise of creative work is not made
The every other embodiment obtained, should all belong to the scope of protection of the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or detachably connected, or integratedly be connected
Connect；Can mechanically connect；Can be joined directly together, can also be indirectly connected to by intermediary, can be in two elements
The connection in portion.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition
Body implication.
In addition, in the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.If this
Occur the term of " process " in specification, it refers not only to independent process, when can not clearly be distinguished with other processes, as long as
It can realize that the effect desired by the process is then also included within this term.In addition, the numerical value model represented in this specification with "-"
Enclose the scope for referring to that the numerical value recorded before and after "-" is included as minimum value and maximum.In the accompanying drawings, structure phase
Like or identical unit be indicated by the same numeral.
The embodiments of the invention provide a kind of test fixture, the workpiece for measurement on test platform can be driven by rotary components
Rotation tilts to different conditions, the workpiece for measurement is obtained the measurement parameter under different conditions, is obtained not so as to pass through
The calibration to workpiece for measurement is realized with multiple measurement parameters under state.
Referring to Fig. 1, three-dimensional assembling schematic diagrams of the Fig. 1 for the test fixture of the present embodiment.In embodiments of the present invention, should
Test fixture 100 includes substrate 10, the rotary components 30 being fixed on the substrate 10 and is connected to the rotary components 30
Interior test platform 50, the test platform 50 is to clamp workpiece for measurement, and the rotary components 30 are to drive the test
Platform 50 rotates, and is tested so that correspondence drives the workpiece for measurement rotation on the test platform 50 to tilt to different conditions.
The workpiece for measurement of one embodiment of the invention includes but is not limited to：Mobile phone, intelligent watch, motion bracelet etc. are filled
Electronic equipment equipped with geomagnetic sensor, the workpiece for measurement is fixed on the rotary components 30, and passes through the rotation group
Part 30 drives workpiece for measurement to tilt to different conditions, now, and workpiece for measurement is that can record the measurement data under different heeling conditions,
The measurement data includes the data and the oneself state data of workpiece for measurement of the absolute force correlation under current state, finally
Pass through calibration of the multiple measurement data realization recorded to the geomagnetic sensor on the workpiece for measurement.
The test fixture 100 of the present invention, can be driven by the rotary components 30 and be fixed on the test platform 50
Workpiece for measurement is rotated to arbitrary plane, is only capable of compared to more existing in single specific plane (such as horizontal plane or vertical plane)
Workpiece for measurement can be tilted to different angles and put shape by the test fixture of fixed workpiece for measurement, test fixture 100 of the invention
State is tested, and meets the requirement of multiple test parameters of the workpiece for measurement, makes the workpiece for measurement can be under different conditions
Measurement parameter is obtained, and realizes according to multiple measurement parameters of acquisition the calibration of the workpiece for measurement.
Further, also referring to Fig. 2, Fig. 2 is the schematic perspective view of test platform in test fixture shown in Fig. 1.Institute
Stating test platform 50 includes loading plate 51 and two movable card articles 53 being arranged on the loading plate 51, the test platform
50 fix the workpiece for measurement by the movable card article 53.Specifically, the movable card article 53 by way of clamping by institute
Workpiece for measurement is stated to be fixed on the test platform 50.
In an embodiment of the invention, two movable card articles 53 are arranged in parallel, each movable card article
It is used for the side (i.e. movable card article 53 supports the contact surface of the workpiece for measurement) for clamping the workpiece for measurement on 53 provided with slow
Rush portion 531.The buffer part 531 is made of padded coaming, and it can not only increase movable card article 53 and clamped work to be measured
Frictional force between part, prevents workpiece for measurement from being come off in rotation process, and the buffer part 531 goes back movable card article 53 described in available buffer
To the active force of workpiece surface to be measured, to prevent from clamping the surface that workpiece for measurement is damaged during the workpiece for measurement.
Further, an at least fixing groove 511 is offered on the loading plate 51, movable card article 53 is fixed on institute described in two
State at fixing groove 511, and can be along the slide in opposition of fixing groove 511 or opposite slip, to clamp various sizes of work to be measured
Part, i.e., clamp various sizes of workpiece for measurement by adjusting the distance between two movable card articles 53.
Pass through the fixing groove 511 opened up on loading plate 51 so that the movable card article 53 can be opposite on loading plate 51
Or dorsal glide and adjust the relative position between two movable card articles 53, so as to adapt to clamp various sizes of workpiece for measurement.This
Outside, when the workpiece for measurement is fixed on the loading plate 51 by two movable card articles 53, by adjusting the active card
The location on the surface of loading plate 51 of bar 53, the overall center of gravity of the loading plate 51 be able to can be protected in center (figure is not marked)
Water holding level state, to meet the test parameter requirement of workpiece for measurement.
It is understood that the fixing groove 511 can be only one, two movable card articles 53 may be contained within the fixing groove
In 511, and can be along the slide in opposition of fixing groove 511 or dorsal glide；The fixing groove 511 can also be two, two institutes
The bearing of trend for stating fixing groove 511 is on same straight line, and both separately a certain distance, each movable 53 points of card article
It is not arranged in a correspondence fixing groove 511, and two movable card articles 53 can be limited by the spacing between two fixing grooves 511
Scope of activities and two movable card articles 53 between minimum range so that the minimum dimension of workpiece for measurement can be clamped by limiting.It is described
Fixing groove 511 can also be two, and the bearing of trend of fixing groove 511 is parallel to each other described in two, each movable card article
53 are fixed on described in two in fixing groove 511 simultaneously；The fixing groove 511 can also be divided to two groups of symmetrical settings four or six
It is individual, fix a movable card article 53 with two either three fixing grooves 511 respectively by same group.Here, not to described solid
The shape and quantity for determining groove 511 are specifically limited, as long as the movable card article 53 can slidably be set relatively.
As shown in Fig. 2 in embodiments of the present invention, four fixing grooves 511 are offered on the loading plate 51, described in four
511 points of axis for relatively described loading plate 51 of fixing groove are (i.e. through straight where the symmetry axis at the center of loading plate 51
Line) symmetrically arranged two groups, and the bearing of trend of two fixing grooves 511 in every group is parallel to each other, and one in every group
Fixing groove 511 and the corresponding fixing groove 511 in another group are on same straight line, and both separately it is certain away from
From.Each movable card article 53 is fixed in one group of fixing groove 511, and can be slided and be adjusted and another group along this group of fixing groove 511
The spacing between movable card article 53 in fixing groove 511, to clamp various sizes of workpiece for measurement.
In the present embodiment, the movable card article 53 is strip, and is fixed by least a bolt or trip etc.
Part 55 is installed at the fixing groove 511, and can be by adjusting the fixture 55 so that the movable card article 53 is fixed on institute
State on loading plate 51 or moved relative to loading plate 51.Can fix the movable card article 53 for example, tightening the fixture 55
On the loading plate 51, unclamping fixture 55 can be such that movable card article 53 is moved relative to loading plate 51.
It is appreciated that the movable card article 53 can also be a flexible claw, or can opening and closing for one
Claw, by control the claw open in various degree and clamp various sizes of workpiece for measurement.In the embodiment of the present invention,
The structure to the movable card article 53 is not specifically limited, if can open in various degree and can fix various sizes of
Workpiece for measurement.
Further, the test platform 50 also includes connecting rod 57 (as shown in Figure 1), and the connecting rod 57 is fixed on institute
State on loading plate 51, and connect the rotary components 30.The connecting rod 57 is by the test platform 50 and the rotary components 30
Connect as one, to drive test platform 50 and the workpiece for measurement being fixed on the test platform 50 by the rotary components 30
Rotated and then the workpiece for measurement is tested.
In inventive embodiments, the connecting rod 57 is two, and the two, which intersects, is arranged on the loading plate 51, two
Connecting rod 57 is connected to the rotary components 30, and can drive the loading plate 51 under the drive of the rotary components 30
And the workpiece for measurement being fixed on the test platform 50 is rotated and then the workpiece for measurement is tested.
In embodiments of the present invention, the loading plate 51 is a rectangular flat, and two connecting rods 57 are respectively along described
Two axis of loading plate 51 are set, and connecting rod 57 described in two is vertically intersected on the center of the loading plate 51 (such as Fig. 1 institutes
Show, two connecting rods 57 extend respectively along X-axis and Y direction).On a wherein connecting rod 57 between two groups of fixing grooves 511
(connecting rod 57 that such as Fig. 1 extends along X-direction) is symmetrical arranged, and the relatively another company of two in each group fixing groove 511
Extension bar 57 is symmetrical arranged.
Further, referring to Fig. 1, as shown in figure 1, the rotary components 30 include support frame 31, the first swivel mount 33
With the second swivel mount 35, wherein, support frame as described above 31 is fixed on the substrate 10 vertically, i.e., support frame as described above 31 is fixed on institute
State on substrate 10, and it is vertical with the plane where substrate 10.First swivel mount 33 can be with respect to support frame as described above 31 rotatably
It is sheathed in support frame as described above 31, further, first swivel mount 33 is sheathed in support frame as described above 31, and can be relative to
Support frame 31 rotates；First swivel mount 33 is vertical with the plane where substrate 10, when the first swivel mount 33 is relative to described
When support frame 31 rotates, the plane where the first swivel mount 33 can be formed with the place plane of support frame as described above 31 presss from both sides at any angle
Angle.Second swivel mount 35 carries the test platform 50, and is sheathed in first swivel mount 33, the second swivel mount 35
The test platform 50 can be driven to do 360 ° of rotations relative to first swivel mount 33 together；Wherein, second swivel mount 35
When being rotated relative to first swivel mount 33, the plane where the second swivel mount 35 can be formed with the place plane of support frame as described above 31
Angle, corresponding the rotation of test platform 50 fixed in second swivel mount 35 to be tilted into different states at any angle, surveys
Fixed workpiece for measurement can obtain the measurement data under different conditions on examination platform 50, to be somebody's turn to do according to measurement data calibration
Workpiece for measurement.
In an embodiment of the present invention, the opposite end of two connecting rods 57 on the loading plate 51 is respectively connecting to institute
The inwall of the second swivel mount 35 is stated, so that the test platform 50 is fixed on into second swivel mount 35 by the connecting rod 57
Institute is planar.
Further, support frame as described above 31 is installed vertically on the substrate 10 by the screens 60 set on the substrate 10
On.
In an embodiment of the invention, support frame as described above 31, the first swivel mount 33 are with the second swivel mount 35
Ring bodies or hollow framework.Pass through two phases of the first rotary shaft 37 between first swivel mount 33 and support frame as described above 31
Connection, and two the first rotary shafts 37 are individually fixed in the opposite sides inwall of support frame as described above 31 and the phase of the first swivel mount 33
To between the outer wall of both sides.Because the first swivel mount 33 is sheathed in support frame as described above 31, so relative the two of the first swivel mount 33
End is respectively that axle is rotated in support frame as described above 30 with the first rotary shaft 37.In embodiments of the present invention, two the first rotary shafts
Point-blank, and the extended line is on a first direction perpendicular with the substrate 10 for extended line where 37
(Z-direction as shown in Figure 1).
It is connected between second swivel mount 35 and first swivel mount 33 by two the second rotary shafts 39, and two
Individual second rotary shaft 39 is individually fixed in the opposite sides inwall of the first swivel mount 33 and second swivel mount 35 relative two
Between the outer wall of side.Because the second swivel mount 35 is sheathed in first swivel mount 33, so relative the two of the second swivel mount 35
End is respectively that axle is rotated in first swivel mount 33 with the second rotary shaft 39.In embodiments of the present invention, two second rotations
Extended line where rotating shaft 39 point-blank, and two the second rotating shafts 39 with a wherein connecting rod 57 (along Y-axis in such as Fig. 1
Direction extension connecting rod 57) extended line point-blank.In an embodiment of the invention, two second rotations
Extended line where axle 39 is in a second direction (in such as Fig. 1 along Y direction) parallel with the substrate 10, and described second
Direction and the first direction are perpendicular.
In one embodiment of the present invention, two second rotary shafts 39 as described in wherein one connecting rod 57 it is relative
Two ends extend to be formed.It is specific as follows：The opposite end of connecting rod 57 is connected to the interior of second swivel mount 35 wherein described in one
Wall, and two apparent surfaces of second swivel mount 35 are further extended through, the opposite end of the connecting rod 57 is protruded institute
The second swivel mount 35 is stated, and the two ends of the second swivel mount of protrusion 35 of the connecting rod 57 are connected to first swivel mount
33 inwall, second rotary shaft 39 is formed to protrude the two ends of second swivel mount 35 by the connecting rod 57, and
Realize being relatively fixed between the second swivel mount 35 and the first swivel mount 33.
In the present embodiment, support frame as described above 31, the first swivel mount 33 and the second swivel mount 35 are circular ring,
And being radially arranged along first swivel mount 33 of the first rotary shaft 37, second rotary shaft 39 is revolved along described second
Pivoted frame 35 is radially arranged.The first swivel mount 33 being set in support frame as described above 31 is done with first rotary shaft 37 for axle
360 ° of rotations, make the place plane of the first swivel mount 33 to be formed with the place plane of support frame as described above 31 and press from both sides at any angle
Angle；The second swivel mount 35 being set in first swivel mount 33 is that axle does 360 ° of rotations with second rotary shaft 39, is made
Second swivel mount 35 and the place plane of test platform 50 thereon can be formed with the place plane of the first swivel mount 33 appoints
The angle for angle of anticipating.Therefore, while when rotating first swivel mount 33 and the second swivel mount 35, you can drive the test flat
Platform 50 is rotated to any angle of arbitrary plane, that is, drives electronic equipment rotation to tilt to different conditions, to meet workpiece for measurement
Various parameters requirement in test process.
Further, the test fixture 100 also includes (the ginseng figure of horizon detector 70 being arranged on the loading plate 51
2), to detect the horizontality whether test platform 50 is in.
In the present embodiment, the horizon detector 70 is two, and the center of relatively described loading plate 51 is in
Central Symmetry, to increase the precision of the level detection to the test platform 50.
In the embodiment of invention, the horizon detector 70 is air-bubble level.
Further, the test fixture 100 is made of the rigid engineering plastics without metal material.Described first turn
Axle 37 is made with the second rotating shaft 39 of wear-resisting sapphire glass material.
In one embodiment of this invention, the workpiece for measurement includes but is not limited to：The electronics such as mobile phone, tablet personal computer are set
Standby, the test fixture 100 obtains different tilt to drive electronic equipment rotation to tilt to different conditions with electronic devices
Multigroup measurement data under state, and realize according to measured multigroup measurement data the calibration of geomagnetic sensor.
Referring to Fig. 1, in the present embodiment, the substrate 10 is arranged at the XY in 3-D walls and floor shown in map file
In plane (i.e. in horizontal plane), support frame as described above 31 is arranged in XZ planes, and is fixed on the substrate by the screens 60
On 10.First rotary shaft 37 is set along Z-direction so that first swivel mount 33 can be around first rotary shaft 37
(i.e. Z axis) makees 360 ° of rotations in support frame as described above 31.Second rotary shaft 39 is set along with the perpendicular Y direction of Z axis,
When first swivel mount 33 is motionless, second swivel mount 35 individually can make 360 ° around the second rotary shaft 39 (i.e. Y-axis)
Rotation；And when first swivel mount 33 and second swivel mount 35 rotate simultaneously, second swivel mount 35 is in the first rotation
Under the drive of pivoted frame 33, the test platform 50 and the workpiece for measurement being fixed on the test platform 50 can rotate to any put down
Face.
The present invention test fixture 100, can by rotary components 30 drive test platform 50 on workpiece for measurement rotate to
In arbitrary plane, the more existing test fixture for being only capable of fixing workpiece for measurement in single specific plane can incline workpiece for measurement
Tiltedly tested to different conditions, meet the requirement of multiple test parameters of workpiece for measurement, make the workpiece for measurement can be in difference
Measurement data is obtained under state, and realizes according to multiple measurement data of acquisition the calibration of the workpiece for measurement.Below i.e. with mobile phone
As being illustrated exemplified by workpiece for measurement, the application method to the test fixture 100 in the reference axis shown in Fig. 1 is done furtherly
It is bright.
Fig. 3 is please combined in the lump, and Fig. 3 is the method flow diagram of calibration geomagnetic sensor.In embodiments of the present invention, calibration ground
The method of Magnetic Sensor comprises the following steps：
S301：Obtain absolute force initial value of the workpiece for measurement under initial level state；
S302：Obtain the oneself state value of the workpiece for measurement respectively under different heeling conditions and absolute force value；
S303：Determine the absolute force value under the different heeling conditions and the offset of absolute force initial value；
S304：Workpiece for measurement is calibrated with offset according to the oneself state value under the different heeling conditions.
When further illustrating below in conjunction with above-mentioned test fixture 100 using mobile phone as the workpiece for measurement, on calibration mobile phone
Geomagnetic sensor method.
In embodiments of the present invention, the mobile phone can voluntarily obtain absolute force value and the oneself state under its current state
Value.Wherein, the oneself state value refers to the attitude data of the gyroscope in the mobile phone, and can be obtained at any time by gyroscope
Take；The absolute force value can be measured by the geomagnetic sensor in mobile phone, and the mobile phone is equiped with a Calibration interface, institute
State mobile phone and obtain the absolute force value under current state in the instruction that the Calibration interface is sent based on operating personnel.
In the step S301, the mobile phone is adjusted to initial level state first, and opens the school on mobile phone
Quasi-ordering, clicks on initialization, mobile phone acquiescence is current to be in horizontality, the current data of gyroscope (i.e. current phone
Oneself state value) it is the horizontal origin benchmark of mobile phone posture, and the absolute force value measured now is used as absolute force initial value α 0
(x0, y0, z0).
Calibrated by the test fixture 100 when the geomagnetic sensor of mobile phone, the mobile phone is fixed on the survey
Try on the test platform 50 in fixture 100, and by adjusting the rotary components 30 by the mobile phone on the test platform 50
Adjust to horizontality.Concrete operations are as follows：By adjusting first swivel mount 33 and second swivel mount 35 respectively
Position, makes first swivel mount 33 rotate to its initial position (i.e. the first swivel mount 33 be located at YZ planes in), and by institute
The second swivel mount 35 is stated to rotate to its initial position (i.e. the second swivel mount 35 is located in X/Y plane).Wherein, whether the mobile phone
In horizontality, it can be detected by the horizon detector 70 on the test platform 50.Now, the mobile phone
Obtain the absolute force initial value under horizontality.
, it is necessary to respectively adjust the mobile phone to different heeling conditions in the step S302, and measure and each incline
Oneself state value and absolute force value under ramp-like state, are used during for subsequent calibrations.Specifically, first rotation can be rotated
Pivoted frame 33 and/or second swivel mount 35, realize that mobile phone by the test platform 50 and thereon is rotated to different inclinations
State (i.e. non-standard state), the mobile phone can obtain its data value under different heeling conditions by gyroscope, and
The absolute force value under different heeling conditions is obtained by geomagnetic sensor.That is, in embodiment of the present invention, rotation can be passed through
Any one in first swivel mount 33 and second swivel mount 35 adjusts the heeling condition of the mobile phone, can also pass through
Both first swivel mount 33 and described second swivel mount 35 is rotated to adjust the heeling condition of the mobile phone.When click mobile phone
During specific button in Calibration interface, such as during " record " button set on mobile phone calibration interface, mobile phone will be recorded currently
The absolute force value that the attitude data and geomagnetic sensor of gyroscope are sensed, the attitude data of the gyroscope is mobile phone
The oneself state value.
In the step S303, according in the absolute force value and the step S301 got in the step S302
The absolute force initial value got, calculates the absolute force offset under different conditions.Specifically, will be obtained in step S303
To different heeling conditions under absolute force value subtract the absolute force initial value, you can obtain under different heeling conditions
The absolute force offset.
Because the oneself state value and absolute force value under different heeling conditions are all when being different from horizontality
Data.And this calibration method, seek to find the difference value of absolute force between a certain non-standard state and horizontality (i.e.
Above-mentioned absolute force offset), it is horizontal to be returned to the magnetic field data compensation of mobile phone by the absolute force difference value
The absolute force initial value of state.It is assumed that the geomagnetic data under a certain heeling condition is α 1 (x1, y1, z1), it is relative to initially
Magnetic data α 0 (x0, y0, z0) magnetic compensation value is β 1 (Δ x1, Δ y1, Δ z1), wherein, Δ x1=x1-x0；Δ y1=y1-
y0；Δ z1=z1-z0.Step S302 and S303 is repeated several times, to obtain the absolute force offset under different heeling conditions,
For in actual use, mobile phone matches the absolute force offset under closest heeling condition, then according to described
Closest absolute force offset is calibrated to the absolute force initial value under horizontality.
It is understood that the mobile phone it is automatic by under measured electromagnetism intensity initial value, different heeling conditions from
The parameter such as body attitude data (the oneself state value) and absolute force offset is stored in mobile phone EMS memory, for mobile phone calibration
Use.Also, itself attitude data under each different heeling conditions and absolute force offset as one group of data storage in
In the mobile phone, multiple different heeling condition corresponding records have multigroup by itself attitude data and absolute force offset group
Into data.
In the step S304, when mobile phone is in different heeling conditions, mobile phone is by from the multi-group data recorded before
In match the one group data closest with current oneself state data, and pass through the absolute force offset in this group of data
To compensate absolute force value, so that the absolute force value of mobile phone is adjusted to the absolute force initial value, so as to complete mobile phone
The calibration of absolute force.
The present invention calibration geomagnetic sensor method in, record different conditions under absolute force offset and itself
Status data, to complete to pass earth magnetism by the multi-group data being made up of the absolute force offset and oneself state data
The calibration of sensor.
The present invention also provides a kind of application method of test fixture.Fig. 4 is please combined in the lump, and Fig. 4 is test fixture shown in Fig. 1
Application method flow chart.In embodiments of the present invention, the application method of test fixture comprises the following steps：
S401, test fixture is adjusted to initial level state；
S402, workpiece for measurement is fixed on the test fixture；
S403, the test fixture is sequentially adjusted in different heeling conditions, is in so that workpiece for measurement is obtained and recorded
Absolute force value and oneself state value under different heeling conditions, workpiece for measurement can be according to the absolute force value of record and itself
State value is calibrated to geomagnetic sensor thereon.
In embodiment of the present invention, the concrete operations of the step S401 are as follows：By adjusting first rotation respectively
The position of pivoted frame 33 and second swivel mount 35, makes first swivel mount 33 rotate to (the i.e. first rotation of its initial position
Frame 33 is located in YZ planes), and second swivel mount 35 rotates to its initial position to (i.e. the second swivel mount 35 is positioned at XY
In plane), and the test platform 50 on second swivel mount 35 is judged by the horizon detector 70 on the loading plate 51
Whether horizontality is in.
In the step S402, workpiece for measurement is positioned between two movable card articles 53, to pass through the movable card article
53 fix workpiece for measurement, so that the workpiece for measurement is fixed on test fixture.
In the present invention, the order not to the step S401 and step S402 is specifically limited, and can also first carry out institute
State step S402 and perform the step S401 again, will be after the workpiece for measurement be fixed on the test fixture, then will be described
Test fixture is adjusted to original state, so that workpiece for measurement is adjusted to horizontality.
In the step S403, after workpiece for measurement is fixed on the test platform 50 on second swivel mount 35, lead to
Cross and rotate the swivel mount 35 of the first swivel mount 33 and/or second to drive test platform 50 to rotate, so as to drive test platform
Workpiece for measurement on 50 deflects to different heeling conditions, and the absolute force that workpiece for measurement records initial level state respectively is initial
Value and afterwards the oneself state value under each heeling condition and absolute force value, during subsequent use, workpiece for measurement
Geomagnetic sensor can be entered according to the difference between the absolute force value and absolute force initial value under current tilt state
Row compensation, so that the geomagnetic sensor compensation of workpiece for measurement is arrived into the absolute force initial value of horizontality, you can realize over the ground
The calibration of Magnetic Sensor.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the feature that the embodiment or example are described
It is contained at least one embodiment of the present invention or example.In this manual, the schematic representation of above-mentioned term is differed
Surely identical embodiment or example are referred to.Moreover, specific features, structure, material or the feature of description can be any one
Combined in an appropriate manner in individual or multiple embodiments or example.
The test fixture and the method for calibration geomagnetic sensor provided above the embodiment of the present invention has been carried out in detail
Introduce, specific case used herein is set forth to the principle and embodiment of the present invention, the explanation of above example
It is only intended to the method and its core concept for helping to understand the present invention；Simultaneously for those of ordinary skill in the art, according to this
The thought of invention, be will change in specific embodiments and applications, in summary, and this specification content should not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of test fixture, it is characterised in that the test fixture include substrate, the rotary components being fixed on substrate and
The test platform of the rotary components is connected to, the test platform is used to band to clamp workpiece for measurement, the rotary components
The dynamic test platform rotation, is carried out so that correspondence drives the workpiece for measurement on the test platform to rotate to different heeling conditions
Test.
2. test fixture as claimed in claim 1, it is characterised in that the test platform includes loading plate and is arranged at institute
Two movable card articles on loading plate are stated, two movable card articles are used to fix workpiece for measurement.
3. test fixture as claimed in claim 2 a, it is characterised in that at least fixing groove, two are offered on the loading plate
The movable card article is fixed at the fixing groove, and can be along the fixing groove slide in opposition or dorsal glide, to fix not
With the workpiece for measurement of size.
4. test fixture as claimed in claim 3 a, it is characterised in that buffering is set respectively on each movable card article
Portion, the buffer part is arranged at the movable card article and supported on the contact surface of the workpiece for measurement.
5. test fixture as claimed in claim 2, it is characterised in that the test platform also includes connecting rod, the connection
Bar is fixed on the loading plate, and connects the rotary components, the test platform to be connected with the rotary components.
6. test fixture as claimed in claim 5, it is characterised in that the rotary components include support frame, the first swivel mount
With the second swivel mount, wherein, support frame as described above is perpendicularly fixed on the substrate, and first swivel mount is sheathed on the support
In frame, and can be with respect to support frame as described above any rotation；Second swivel mount is sheathed in first swivel mount, can phase
To the first swivel mount any rotation.
7. test fixture as claimed in claim 6, it is characterised in that first swivel mount by setting in the first direction
First rotary shaft is connected with support frame as described above, second swivel mount by the second rotary shaft for setting in a second direction with it is described
First swivel mount is connected, wherein, plane where the vertical substrate of the first direction, the parallel substrate of the second direction
Place plane.
8. test fixture as claimed in claim 7, it is characterised in that first swivel mount is with second swivel mount
Circular ring, the first rotary shaft being radially arranged along first swivel mount, second rotary shaft is along described second
Swivel mount is radially arranged.
9. the test fixture as described in claim any one of 1-8, it is characterised in that the test fixture also includes being arranged at institute
The horizon detector on test platform is stated, to detect whether the test platform is in horizontality.
10. a kind of method for calibrating geomagnetic sensor, it is characterised in that methods described includes：
Obtain absolute force initial value of the workpiece for measurement under initial level state；
Obtain the oneself state value of the workpiece for measurement respectively under different heeling conditions and absolute force value；
Determine the absolute force value under the different heeling conditions and the offset of absolute force initial value；
Workpiece for measurement is calibrated with offset according to the oneself state value under the different heeling conditions.
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| CN201710322732.6A CN107121710B (en) | 2017-05-09 | 2017-05-09 | Test fixture and method for calibrating geomagnetic sensor by test fixture |
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| CN201710322732.6A CN107121710B (en) | 2017-05-09 | 2017-05-09 | Test fixture and method for calibrating geomagnetic sensor by test fixture |
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| CN107121710B CN107121710B (en) | 2023-04-25 |
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