CN106990263B - The test method and device of accelerometer resolution ratio - Google Patents
The test method and device of accelerometer resolution ratio Download PDFInfo
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- CN106990263B CN106990263B CN201710295273.7A CN201710295273A CN106990263B CN 106990263 B CN106990263 B CN 106990263B CN 201710295273 A CN201710295273 A CN 201710295273A CN 106990263 B CN106990263 B CN 106990263B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
Abstract
The present invention relates to the test method of accelerometer resolution ratio and devices, slave centrifuge in double centrifuges is arranged on the rotary table top of main centrifuge, accelerometer is arranged in from the rotary table top of centrifuge, the sensitive axes of accelerometer have a sensitive axes angle, the centrifugal acceleration generated on main centrifuge rotation Shi Cong centrifuge is important on accelerometer, accelerometer exports corresponding data under the action of the component, according to the physical geometry relationship of accelerometer and double centrifuges, change sensitive axes angle by rotating from centrifuge, the difference of the different output datas of available accelerometer, change main centrifuge in the target centrifugal acceleration generated from centrifuge, the difference of the different output datas of accelerometer is obtained under different sensitive axes angles, according to front and back twice the secondary difference of difference and accelerometer in target Whether the resolution ratio of the ratio in judgement accelerometer of the idea output under acceleration incremental value is up to standard.
Description
Technical field
The present invention relates to accelerometers to test technical field, more particularly to a kind of test method of accelerometer resolution ratio
And device.
Background technique
Accelerometer vibration detection, action recognition, state recording and in terms of be widely used.
In the development of accelerometer, production and in use, require to calibrate the performance of accelerometer.
Performance indexes of the accelerometer within ± 1g is tested using gravitational field 1g tumbling test, but is surveyed
Amount range is confined within ± 1g.Since acceleration of gravity can accurately know its size and Orientation, point of accelerometer
Resolution is tested using gravitational field 1g tumbling test.
However, being more than the accelerometer of 1g for range, the test calibration of resolution ratio is also needed using other equipment
It can complete, such as precision centrifuge.If the test of the static performance index such as the resolution ratio of accelerometer to range greater than 1g
Calibration, needs gravitational field 1g tumbling test equipment and the two or more equipment of precision centrifuge that can complete, the hardware of test at
This is higher.
Summary of the invention
Based on this, it is necessary to the test calibration of the accelerometer associated static performance indicator for traditional range greater than 1g
The higher problem of required hardware cost provides the test method and device of a kind of accelerometer resolution ratio.
A kind of test method of accelerometer resolution ratio, comprising the following steps:
Accelerometer is horizontally arranged on the rotary table top of the slave centrifuge of double centrifuges, wherein be arranged from centrifuge
On the rotary table top of the main centrifuge of double centrifuges, main centrifuge and the rotary table top from centrifuge are horizontally disposed with；
The aimed acceleration incremental value that accelerometer is chosen according to the resolution ratio calibration value of accelerometer, accelerates according to target
Spend incremental value choose main centrifuge the target centrifugal acceleration and target centrifugal acceleration incremental value generated from centrifuge,
The target susceptibility shaft angle angle value of accelerometer and the target susceptibility shaft angle degree incremental value of accelerometer；Wherein, sensitive axes angle is
The sensitive axes of accelerometer and included angle with reference to straight line, with reference to straight line perpendicular to main centrifuge rotation center with from centrifugation
The line of the rotation center of machine；
Rotation makes the sensitive axes angle value of accelerometer reach target susceptibility shaft angle angle value, root from the rotary table top of centrifuge
Main centrifuge is operated according to target centrifugal acceleration, records the first output valve of accelerometer；
According to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge, the second output of accelerometer is recorded
Value；
Calculate the first output difference between the second output valve and the first output valve；
Rotation makes the sensitive axes angle value of accelerometer reach target susceptibility shaft angle angle value, root from the rotary table top of centrifuge
According to target centrifugal acceleration and target centrifugal acceleration incremental value and value operating main centrifuge, record the third of accelerometer
Output valve；
According to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge, the 4th output of accelerometer is recorded
Value；
The second output difference and the second output difference and first between calculating third output valve and the 4th output valve is defeated
Secondary difference between difference out；It obtains the idea output under the conditions of aimed acceleration incremental value input acceleration meter, if
The ratio of secondary difference and idea output is greater than preset value, then determines that the resolution test of accelerometer passes through.
According to the test method of above-mentioned accelerometer resolution ratio, main centrifuge is arranged in the slave centrifuge in double centrifuges
On rotary table top, accelerometer is arranged in from the rotary table top of centrifuge, and the sensitive axes of accelerometer have a sensitive axes angle,
The centrifugal acceleration generated on main centrifuge rotation Shi Cong centrifuge is important on accelerometer, and accelerometer is in the component
Under the action of export corresponding data, produced from centrifuge according to the aimed acceleration incremental value of accelerometer and main centrifuge
The target susceptibility shaft angle angle value of raw target centrifugal acceleration, accelerometer and the target susceptibility axis angle step of accelerometer
Physical geometry relationship between value changes sensitive axes angle, the difference of available accelerometer by rotating from centrifuge
The difference of output data changes main centrifuge in the target centrifugal acceleration generated from centrifuge, in different sensitive shaft angles
The difference that the different output datas of accelerometer are obtained under degree, according to front and back twice the secondary difference of difference and accelerometer in mesh
The ratio of the idea output under acceleration incremental value is marked it may determine that whether the resolution ratio of accelerometer is up to standard.In this programme
In, accelerometer can be tested using double centrifuges, without gravitational field 1g tumbling test equipment etc., other are valuable
Test equipment reduces the hardware cost of test, and measurement range is not limited within ± 1g, may be implemented to low g value or
The test of accelerometer with high g values resolution ratio.
A kind of test device of accelerometer resolution ratio, including double centrifuges and fixture；
Double centrifuges include main centrifuge and from centrifuge, and the rotation of the main centrifuge of double centrifuges is arranged in from centrifuge
On table top, main centrifuge and the rotary table top from centrifuge are horizontally disposed with；Fixture is arranged in from the rotary table top of centrifuge,
For being horizontally mounted accelerometer；
The aimed acceleration incremental value that accelerometer is chosen according to the resolution ratio calibration value of accelerometer, accelerates according to target
Spend incremental value choose main centrifuge the target centrifugal acceleration and target centrifugal acceleration incremental value generated from centrifuge,
The target susceptibility shaft angle angle value of accelerometer and the target susceptibility shaft angle degree incremental value of accelerometer；Wherein, sensitive axes angle is
The sensitive axes of accelerometer and included angle with reference to straight line, with reference to straight line perpendicular to main centrifuge rotation center with from centrifugation
The line of the rotation center of machine；
Accelerometer is horizontally arranged on the rotary table top of the slave centrifuge of double centrifuges, rotates the rotation from centrifuge
Table top makes the sensitive axes angle value of accelerometer reach target susceptibility shaft angle angle value, according to the operating of target centrifugal acceleration it is main from
Scheming records the first output valve of accelerometer；
According to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge, the second output of accelerometer is recorded
Value；
Calculate the first output difference between the second output valve and the first output valve；
Rotation makes the sensitive axes angle value of accelerometer reach target susceptibility shaft angle angle value, root from the rotary table top of centrifuge
According to target centrifugal acceleration and target centrifugal acceleration incremental value and value operating main centrifuge, record the third of accelerometer
Output valve；
According to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge, the 4th output of accelerometer is recorded
Value；
The second output difference and the second output difference and first between calculating third output valve and the 4th output valve is defeated
Secondary difference between difference out；It obtains the idea output under the conditions of aimed acceleration incremental value input acceleration meter, if
The ratio of secondary difference and idea output is greater than preset value, then determines that the resolution test of accelerometer passes through.
According to the test device of above-mentioned accelerometer resolution ratio comprising double centrifuges and fixture；In double centrifuges from
Centrifuge is arranged on the rotary table top of main centrifuge, and accelerometer is mounted on from the rotary table top of centrifuge by fixture,
The sensitive axes of accelerometer have a sensitive axes angle, and the centrifugal acceleration generated on main centrifuge rotation Shi Cong centrifuge is adding
Important on speedometer, accelerometer exports corresponding data under the action of the component, is accelerated according to the target of accelerometer
Incremental value and main centrifuge are spent in the target centrifugal acceleration generated from centrifuge, the target susceptibility shaft angle degree of accelerometer
Physical geometry relationship between value and the target susceptibility shaft angle degree incremental value of accelerometer, it is quick to change from centrifuge by rotating
Feel shaft angle degree, the differences of the different output datas of available accelerometer changes main centrifuge and generating from centrifuge
Target centrifugal acceleration obtains the difference of the different output datas of accelerometer, according to front and back under different sensitive axes angles
Twice idea output of the secondary difference and accelerometer of difference under aimed acceleration incremental value ratio it may determine that
Whether the resolution ratio of accelerometer is up to standard.In the present solution, can be tested accelerometer using double centrifuges, it is not necessarily to
Other valuable test equipments such as gravitational field 1g tumbling test equipment, reduce the hardware cost of test, and measurement range is not
It is confined within ± 1g, the test to low g value or accelerometer with high g values resolution ratio may be implemented.
Detailed description of the invention
Fig. 1 is the flow diagram of the test method of the accelerometer resolution ratio of one of embodiment；
Fig. 2 is the structural schematic diagram of the test device of the accelerometer resolution ratio of one of embodiment；
Fig. 3 is the structure principle chart of double centrifuges in the test device of the accelerometer resolution ratio of one of embodiment；
Fig. 4 is the sensitive axes angle schematic diagram of accelerometer on the slave centrifuge of one of embodiment.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
And the scope of protection of the present invention is not limited.
It is shown in Figure 1, it is the flow diagram of the test method of accelerometer resolution ratio of the invention.The present embodiment
The test method of accelerometer resolution ratio, comprising the following steps:
Step S101: accelerometer is horizontally arranged on the rotary table top of the slave centrifuge of double centrifuges, wherein from from
Scheming is arranged on the rotary table top of the main centrifuge of double centrifuges, and main centrifuge and the equal level of rotary table top from centrifuge are set
It sets；
Step S102: the aimed acceleration incremental value of accelerometer, root are chosen according to the resolution ratio calibration value of accelerometer
Main centrifuge is chosen according to aimed acceleration incremental value to add in target centrifugal acceleration and the target centrifugation generated from centrifuge
The target susceptibility shaft angle degree incremental value of speed increment value, the target susceptibility shaft angle angle value of accelerometer and accelerometer；Wherein, quick
The sensitive axes that shaft angle degree is accelerometer and the included angle with reference to straight line are felt, with reference to straight line perpendicular in the rotation of main centrifuge
The line of the heart and the rotation center from centrifuge；
In this step, meet the target centrifugal acceleration and target susceptibility axis chosen in double centrifuges and accelerometer
There is a centrifugal acceleration under conditions of angle value, on accelerometer, it is quick that the target susceptibility shaft angle angle value of accelerometer increases target
After feeling shaft angle degree incremental value, there are a centrifugal acceleration, the difference of latter centrifugal acceleration and previous centrifugal acceleration on accelerometer
Value is aimed acceleration incremental value；
Step S103: rotation makes the sensitive axes angle value of accelerometer reach target susceptibility axis from the rotary table top of centrifuge
Angle value operates main centrifuge according to target centrifugal acceleration, records the first output valve of accelerometer；
Step S104: according to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge, accelerometer is recorded
The second output valve；
In this step, being rotated according to target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge is in step S103
On the basis of carry out, i.e. rotation makes the sensitive axes angle value of accelerometer reach target susceptibility axis from the rotary table top of centrifuge
Angle value and target susceptibility shaft angle degree incremental value and value；
Step S105: the first output difference between the second output valve and the first output valve is calculated；
Step S106: rotation makes the sensitive axes angle value of accelerometer reach target susceptibility axis from the rotary table top of centrifuge
Angle value, according to target centrifugal acceleration and target centrifugal acceleration incremental value and value operating main centrifuge, record accelerate
Spend the third output valve of meter；
Step S107: according to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge, accelerometer is recorded
The 4th output valve；
In this step, being rotated according to target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge is in step S106
On the basis of carry out, i.e. rotation makes the sensitive axes angle value of accelerometer reach target susceptibility axis from the rotary table top of centrifuge
Angle value and target susceptibility shaft angle degree incremental value and value；
Step S108: the second output difference and the second output difference between third output valve and the 4th output valve are calculated
Secondary difference between value and the first output difference；It obtains the ideal under the conditions of aimed acceleration incremental value input acceleration meter
Output valve determines that the resolution test of accelerometer passes through if the ratio of secondary difference and idea output is greater than preset value.
In the present embodiment, the slave centrifuge in double centrifuges is arranged on the rotary table top of main centrifuge, accelerometer
It is arranged in from the rotary table top of centrifuge, the sensitive axes of accelerometer have a sensitive axes angle, and main centrifuge rotates Shi Cong
The centrifugal acceleration generated on centrifuge is important on accelerometer, and accelerometer exports accordingly under the action of the component
Data, according to the aimed acceleration incremental value of accelerometer and main centrifuge in the target centrifugal acceleration generated from centrifuge
Physical geometry between value, the target susceptibility shaft angle angle value of accelerometer and the target susceptibility shaft angle degree incremental value of accelerometer is closed
System, changes sensitive axes angle by rotating from centrifuge, and the difference of the different output datas of available accelerometer changes
Main centrifuge obtains accelerometer not under different sensitive axes angles in the target centrifugal acceleration generated from centrifuge
With the difference of output data, according to the reason of the secondary difference and accelerometer of front and back difference twice under aimed acceleration incremental value
The ratio of output valve is thought it may determine that whether the resolution ratio of accelerometer is up to standard.In the present solution, can using double centrifuges
To test accelerometer, without other valuable test equipments such as gravitational field 1g tumbling test equipment, test is reduced
Hardware cost, and measurement range is not limited within ± 1g, may be implemented to low g value or accelerometer with high g values resolution ratio
Test.
In addition, considering main centrifuge in the solution of the present invention in the target centrifugal acceleration increment generated from centrifuge
Value, since the order of magnitude of target centrifugal acceleration incremental value can reduce the order of magnitude of aimed acceleration incremental value with very little,
To improve the precision of testing acceleration score resolution.
Optionally, the step of operating main centrifuge according to target centrifugal acceleration can be by adjusting the rotation of main centrifuge
The rotation speed of table with revolvable top is realized.When the rotary table top of main centrifuge is rotated with a fixed angular speed, generated from centrifuge
Certain centrifugal acceleration, the angular speed of the rotary table top of the size and main centrifuge of centrifugal acceleration and the rotation of main centrifuge
The distance dependent at center and rotation center from centrifuge meets following relationship between three: a=w2R, in formula, a is target
Centrifugal acceleration, w are the angular speed of the rotary table top of main centrifuge, the rotation center and the rotation from centrifuge that r is main centrifuge
Turn the distance at center.According to target centrifugal acceleration and the rotation center of main centrifuge and the rotation center from centrifuge away from
Target angular velocity value from the rotary table top for calculating main centrifuge, the rotary table top of main centrifuge are rotated with target angular velocity
When, it just can produce target centrifugal acceleration from centrifuge.Increased according to target centrifugal acceleration and target centrifugal acceleration
Magnitude can also be carried out with value operating main centrifuge according to the above process.
Aimed acceleration incremental value, target centrifugal acceleration incremental value, target susceptibility shaft angle in one of the embodiments,
Angle value and target susceptibility shaft angle degree incremental value meet following relationship:
Δ g=Δ a [sin (θ+Δ θ)-sin θ]
In formula, Δ g indicates that aimed acceleration incremental value, Δ a indicate that target centrifugal acceleration incremental value, θ indicate that target is quick
Feel shaft angle angle value, Δ θ indicates target susceptibility shaft angle degree incremental value.
It in the present embodiment, can be with fast selecting according to above-mentioned formula after determining aimed acceleration incremental value
Target centrifugal acceleration incremental value, target susceptibility shaft angle angle value and target susceptibility shaft angle degree incremental value.
Optionally, should be in the acceleration range of main centrifuge according to the target centrifugal acceleration that formula is chosen, target
Sensitive axes angle value between 0 to 90 degree, target susceptibility shaft angle angle value and target susceptibility shaft angle degree incremental value and value also arrived 0
Between 90 degree.
Main centrifuge is chosen according to aimed acceleration incremental value in one of the embodiments, generating from centrifuge
Target centrifugal acceleration and target centrifugal acceleration incremental value, the target susceptibility shaft angle angle value of accelerometer and accelerometer
The step of target susceptibility shaft angle degree incremental value the following steps are included:
Determine that multiple groups target data, every group of target data include target centrifugal acceleration according to aimed acceleration incremental value
With target centrifugal acceleration incremental value, target susceptibility shaft angle angle value and target susceptibility shaft angle degree incremental value；
Calculate second output difference and first output difference secondary difference the step of the following steps are included:
The secondary difference that the second output difference and the first output difference are calculated under different groups of target datas, obtains all two
The average value of secondary difference；
The ratio of secondary difference and idea output is greater than the ratio that preset value is average value and aimed acceleration incremental value
Greater than preset value.
In the present embodiment, choose main centrifuge the target centrifugal acceleration and target generated from centrifuge from
When the target susceptibility shaft angle degree incremental value of heart acceleration incremental value, the target susceptibility shaft angle angle value of accelerometer and accelerometer,
Multiple groups target data can be chosen, all includes above-mentioned four kinds of numerical value in every group of target data, is calculated under different groups of target datas
Secondary difference, and calculate the average value of all secondary differences, it is possible to reduce because being tested brought by hardware of test device itself
Error improves the accuracy of measuring resolution.
Optionally, when calculating the average value of all secondary differences, directly all secondary differences can be summed it up, then divided by
Target set of data number, obtains average value；It can also be weighted and averaged calculating, such as by the maximum value in all secondary differences and most
Small value is rejected, then seeks the average value of remaining secondary difference, the output difference for being clearly present measurement error can be so rejected, into one
Step improves the accuracy of measuring resolution.
The identical each group target data of target centrifugal acceleration is according to target susceptibility shaft angle in one of the embodiments,
After the sequence arrangement of angle value from small to large, target susceptibility shaft angle angle value and target susceptibility shaft angle degree in previous group target data increase
The sum of magnitude is equal to the target susceptibility shaft angle angle value in later group target data；
Alternatively, target susceptibility shaft angle angle value identical each group target data according to target centrifugal acceleration from small to large
After sequence arranges, after the sum of target centrifugal acceleration and target centrifugal acceleration incremental value in previous group target data are equal to
Target centrifugal acceleration in one group of target data.
In the present embodiment, each group target data of selection is in certain rule, identical for target centrifugal acceleration
Each group target data, after the sequence arrangement of target susceptibility shaft angle angle value from small to large, mesh in previous group target data
Mark the target susceptibility shaft angle degree that the sum of sensitive axes angle value and target susceptibility shaft angle degree incremental value are equal in later group target data
Value, when being tested according to these target set of data, there is common test data, in previous group mesh between different target data group
The second output valve obtained under mark data is identical with the first output valve obtained under later group target data；For target susceptibility
The identical each group target data of shaft angle angle value, after the sequence arrangement of target centrifugal acceleration from small to large, previous group mesh
Mark the mesh that the sum of target centrifugal acceleration and target centrifugal acceleration incremental value in data are equal in later group target data
Centrifugal acceleration is marked, when being tested according to these target set of data, there is common test number between different target data group
According to the third output valve obtained under previous group target data and the first output valve phase obtained under later group target data
Together；These identical test datas only need to be tested once, testing process is enormously simplified.
During actual test, can the identical each group target data of first selection target centrifugal acceleration surveyed
Examination carries out when test according to the sequence that target susceptibility shaft angle angle value is incremented by, then changes target centrifugal acceleration and tested；?
Can the identical each group target data of first selection target sensitive axes angle value tested, according to target centrifugal acceleration when test
The incremental sequence of value carries out, then changes target susceptibility shaft angle angle value and tested.
Main centrifuge is chosen according to aimed acceleration incremental value in one of the embodiments, generating from centrifuge
Target centrifugal acceleration and target centrifugal acceleration incremental value, the target susceptibility shaft angle angle value of accelerometer and accelerometer
The step of target susceptibility shaft angle degree incremental value the following steps are included:
Sensitive axes angle step is determined according to from the Angle Position resolution ratio of centrifuge.
In the present embodiment, need to change sensitive axes angle in resolution test, knots modification is target susceptibility shaft angle
It spends incremental value and determines sensitive axes angle according to from the Angle Position resolution ratio of centrifuge from the Angle Position limited resolution of centrifuge
Increment can satisfy the condition of equipment test, and the sensitive axes angle thereby determined that is smaller, when testing same resolution ratio,
Lesser target susceptibility shaft angle degree incremental value is chosen, the target susceptibility shaft angle angle value of selection is also smaller, can be to avoid target susceptibility
Accelerometer brought by shaft angle angle value is excessive is from the uncertainty and unstability on centrifuge.
It is obtained in one of the embodiments, by the ideal output under the conditions of aimed acceleration incremental value input acceleration meter
The step of value the following steps are included:
Idea output is obtained according to Δ U=K* Δ g, in formula, Δ U indicates idea output, and K indicates the mark of accelerometer
Factor is spent, Δ g indicates aimed acceleration incremental value.
In the present embodiment, the constant multiplier of aimed acceleration incremental value and accelerometer all has determined, according to
Above-mentioned formula can by quick obtaining by aimed acceleration incremental value input acceleration in terms of under the conditions of idea output, convenient for subsequent
Multilevel iudge.
In one of the embodiments, the line of the mass centre of accelerometer and rotation center from centrifuge perpendicular to
From the rotary table top of centrifuge.
In the present embodiment, the line of the weight center of accelerometer and rotation center from centrifuge is perpendicular to from centrifugation
The rotary table top of machine, when such main centrifuge rotates to the centrifugal acceleration from centrifuge itself and accelerometer thereon from
Heart acceleration is identical, and the practical centrifugal acceleration and main centrifuge that can reduce on accelerometer are generating mesh from centrifuge
The error for marking the theoretical acceleration value of centrifugal acceleration brief acceleration meter, further increases the accuracy of resolution test.
Being rotated in one of the embodiments, from the rotary table top of centrifuge reaches the sensitive axes angle value of accelerometer
Before the step of target susceptibility shaft angle angle value the following steps are included:
By the sensitive axes angle value zero setting of accelerometer.
In the present embodiment, before testing begins, by the sensitive axes angle value zero setting of accelerometer, convenient in test
The sensitive axes angle value of accelerometer is directly accurately controlled according to target susceptibility shaft angle angle value.
Optionally, by rotating the sensitive axes angle value zero setting from the rotary table top of centrifuge to accelerometer.
It is in one of the embodiments, two or more from centrifuge, is respectively symmetrically mounted on main centrifuge from centrifuge
On rotary table top.
In the present embodiment, multiple from the rotary table top that centrifuge is symmetrically mounted on main centrifuge, it can be in main centrifugation
The entire double centrifuges of balance, utmostly avoid main centrifuge in the target generated from centrifuge when the rotary table top rotation of machine
The fluctuation of centrifugal acceleration further improves the accuracy of resolution test.
Optionally, in test, accelerometer is mounted on one from centrifuge, the weight bearing identical in quality with accelerometer
Object is fixed on the slave centrifuge of symmetric position, so can further be balanced when the rotary table top of main centrifuge rotates entire
Double centrifuges.
According to the test method of above-mentioned accelerometer resolution ratio, the present invention also provides a kind of tests of accelerometer resolution ratio
Device, just the embodiment of the test device of accelerometer resolution ratio of the invention is described in detail below.
It is shown in Figure 2, it is the structural schematic diagram of the test device of accelerometer resolution ratio of the invention.In the embodiment
Accelerometer resolution ratio test device, including double centrifuges 200 and fixture 300；
Double centrifuges 200 are arranged from centrifuge 220 in main centrifuge 210 including main centrifuge 210 and from centrifuge 220
Rotary table top on, main centrifuge 210 and rotary table top from centrifuge 220 are horizontally disposed；Fixture setting is from centrifuge
On 220 rotary table top, for being horizontally mounted accelerometer；
The aimed acceleration incremental value that accelerometer is chosen according to the resolution ratio calibration value of accelerometer, accelerates according to target
It is quick in the target centrifugal acceleration, the target of accelerometer generated from centrifuge 220 to spend incremental value selection main centrifuge 210
Feel the target susceptibility shaft angle degree incremental value of shaft angle angle value and accelerometer；Wherein, sensitive axes angle is the sensitive axes of accelerometer
With the included angle of reference straight line, with reference to straight line perpendicular to main centrifuge 210 rotation center with from the rotation of centrifuge 220
The line of the heart；
Accelerometer is horizontally arranged at from the rotary table top of centrifuge 220, the rotary table top from centrifuge 220 is rotated
So that the sensitive axes angle value of accelerometer is reached target susceptibility shaft angle angle value, main centrifuge is operated according to target centrifugal acceleration
210, record the first output valve of accelerometer；
According to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge 220, the second of accelerometer is recorded
Output valve；
Rotation makes the sensitive axes angle value of accelerometer reach target susceptibility shaft angle degree from the rotary table top of centrifuge 220
Value, according to target centrifugal acceleration and target centrifugal acceleration incremental value and value operating main centrifuge, record accelerometer
Third output valve；
According to the rotation of target susceptibility shaft angle degree incremental value from the rotary table top of centrifuge, the 4th output of accelerometer is recorded
Value；
The second output difference and the second output difference and first between calculating third output valve and the 4th output valve is defeated
Secondary difference between difference out；It obtains the idea output under the conditions of aimed acceleration incremental value input acceleration meter, if
The ratio of secondary difference and idea output is greater than preset value, then determines that the resolution test of accelerometer passes through.
According to the test device of above-mentioned accelerometer resolution ratio comprising double centrifuges 200 and fixture 300, double centrifuges
In slave centrifuge 220 be arranged on the rotary table top of main centrifuge 210, accelerometer is mounted on from centrifugation by fixture 300
On the rotary table top of machine, the sensitive axes of accelerometer have a sensitive axes angle, and main centrifuge 210 rotates Shi Cong centrifuge 220
The centrifugal acceleration of upper generation is important on accelerometer, and accelerometer exports corresponding data under the action of the component,
According to the aimed acceleration incremental value of accelerometer and main centrifuge 210 in the target CENTRIFUGAL ACCELERATING generated from centrifuge 220
Angle value, the target susceptibility shaft angle angle value of accelerometer, accelerometer target susceptibility shaft angle degree incremental value between physical geometry
Relationship changes sensitive axes angle, the difference of the different output datas of available accelerometer by rotating from centrifuge 220
Value changes main centrifuge in the target centrifugal acceleration generated from centrifuge, is accelerated under different sensitive axes angles
Spend meter different output datas difference, according to front and back twice the secondary difference of difference and accelerometer in aimed acceleration increment
The ratio of idea output under value is it may determine that whether the resolution ratio of accelerometer is up to standard.In the present solution, using it is double from
Scheming can test accelerometer, without other valuable test equipments such as gravitational field 1g tumbling test equipment, drop
The hardware cost of low test, and measurement range is not limited within ± 1g, may be implemented to low g value or high-g level acceleration
The test for resolution of scoring.
Aimed acceleration incremental value, target centrifugal acceleration incremental value, target susceptibility shaft angle in one of the embodiments,
Angle value and target susceptibility shaft angle degree incremental value meet following relationship:
Δ g=Δ a [sin (θ+Δ θ)-sin θ]
In formula, Δ g indicates that aimed acceleration incremental value, Δ a indicate that target centrifugal acceleration incremental value, θ indicate that target is quick
Feel shaft angle angle value, Δ θ indicates target susceptibility shaft angle degree incremental value.
In one of the embodiments, when the test device using accelerometer resolution ratio is tested, according to target
Acceleration incremental value determines that multiple groups target data, every group of target data include target centrifugal acceleration and target centrifugal acceleration
Incremental value, target susceptibility shaft angle angle value and target susceptibility shaft angle degree incremental value；The second output is calculated under different groups of target datas
The secondary difference of difference and the first output difference, obtains the average value of all secondary differences；If average value and idea output
Ratio is greater than preset value, then determines that the resolution test of accelerometer passes through.
The identical each group target data of target centrifugal acceleration is according to target susceptibility shaft angle in one of the embodiments,
After the sequence arrangement of angle value from small to large, target susceptibility shaft angle angle value and target susceptibility shaft angle degree in previous group target data increase
The sum of magnitude is equal to the target susceptibility shaft angle angle value in later group target data；
Alternatively, target susceptibility shaft angle angle value identical each group target data according to target centrifugal acceleration from small to large
After sequence arranges, after the sum of target centrifugal acceleration and target centrifugal acceleration incremental value in previous group target data are equal to
Target centrifugal acceleration in one group of target data.
In one of the embodiments, when the test device using accelerometer resolution ratio is tested, according to from from
The Angle Position resolution ratio of scheming 220 determines sensitive axes angle step.
Idea output is obtained according to Δ U=K* Δ g in one of the embodiments, in formula, Δ U indicates ideal output
Value, K indicate that the constant multiplier of accelerometer, Δ g indicate aimed acceleration incremental value.
The mass centre of accelerometer and the line of the rotation center from centrifuge 220 hang down in one of the embodiments,
Directly in the rotary table top from centrifuge 220.
Make the sensitive axes angle of accelerometer from the rotary table top of centrifuge 220 in rotation in one of the embodiments,
Before reaching target susceptibility shaft angle angle value, by the sensitive axes angle value zero setting of accelerometer.
Be in one of the embodiments, two or more from centrifuge 220, respectively from centrifuge 220 be symmetrically mounted on it is main from
On the rotary table top of scheming 210.
The test method one of the test device of accelerometer resolution ratio of the invention and accelerometer resolution ratio of the invention
One is corresponding, is applicable in the technical characteristic and its advantages of the embodiment elaboration of the test method of above-mentioned accelerometer resolution ratio
In the embodiment of the test device of accelerometer resolution ratio.
In a specific embodiment, as shown in figure 3, the mechanical stage body of double centrifuges by speed stabilizing platform 1 (main centrifuge),
Servo-actuated platform 2 (from centrifuge) composition.The rotary table top of speed stabilizing platform 1 is parallel to the ground, and speed stabilizing platform rotating shaft 3 is perpendicular to ground, surely
Servo-actuated platform 2 on fast 1 rotary table top of platform can for two or more than, servo-actuated platform 2 is symmetrically mounted on 1 rotary table top of speed stabilizing platform
On.
Accelerometer is mounted on the rotary table top of servo-actuated platform 2, and accelerometer sensitive axis is parallel to horizontal plane.Speed stabilizing platform 1
It is at the uniform velocity rotated with certain angular speed, the accelerometer on servo-actuated platform 2 generates certain centrifugal acceleration, centrifugal acceleration
Size by speed stabilizing platform 1 angular speed and working radius (between the rotation center of speed stabilizing platform 1 and the rotation center of servo-actuated platform 2 away from
From) determine, the direction of centrifugal acceleration is the direction that the rotation center of speed stabilizing platform 1 is directed toward the mass center of accelerometer.
Accelerometer is mounted on above servo-actuated platform 2 by fixture, radial centrifugal acceleration direction 5, accelerometer it is quick
It is as shown in Figure 4 to feel axis direction 6.Accelerometer sensitive axis and perpendicular to the angle 4 between the straight line of radial centrifugal acceleration be θ (θ
≠ 0), when speed stabilizing platform 1 rotates, enabling the size of the centrifugal acceleration at servo-actuated platform center is a, then centrifugal acceleration is in acceleration
Count the component in sensitive axis direction are as follows:
a00=a sin θ (1)
The rotation of servo-actuated 2 rotary table top of platform can change angle 4, when angle 4 increases by an increment Delta θ, then accelerometer
Centrifugal acceleration component in sensitive axis direction are as follows:
a01=a [sin (θ+Δ θ)] (2)
In order to obtain multiple incremental values, repeating above step can be obtained:
a0n=a [sin (θ+n Δ θ)] (3)
Wherein, n is the integer more than or equal to 0, and formula (3) is considered as more general including formula (1) and (2)
The expression formula of property.
On the basis of formula (1), if changing the revolving speed of speed stabilizing platform 1, the centrifugal acceleration meeting being servo-actuated at 2 center of platform
An increment Delta a is generated, at this time component of the centrifugal acceleration in accelerometer sensitive axis direction are as follows:
a10=(a+ Δ a) sin θ (4)
The step of performing similarly to formula (2) and (3), available:
a1n=(a+ Δ a) sin (θ+n Δ θ) (5)
When angle immobilizes, and only change the revolving speed for becoming speed stabilizing platform, can equally obtain:
amn=(wherein, m is the integer more than or equal to 0 to a+m Δ a) sin (θ+n Δ θ) (6).
It can be obtained by formula (6):
amn-a(m-1)n=Δ a [sin (θ+n Δ θ)] (7)
am(n-1)-a(m-1)(n-1)=Δ a sin [θ+(n-1) Δ θ] (8)
Enable gn=(7)-(8), then can obtain:
Δgn=Δ a { sin (θ+n Δ θ)-sin [θ+(n-1) Δ θ] } (9)
It,, then can be by changing m's or n if necessary to multiple acceleration increments according to test request in actual test
Value, obtains multiple acceleration increments.
The test of accelerometer resolution ratio is to input to verify in the acceleration input of non-zero g in given acceleration
Under conditions of increment, whether the output of accelerometer variation is greater than (e.g., the variation of reality output and using marking of defined variable quantity
50%) ratio of ideal variable quantity required by fixed constant multiplier is greater than.
It therefore, can be by designing suitable angle theta and increment for the test purpose and requirement of accelerometer resolution ratio
Δ θ, to generate the acceleration increment Delta a for meeting accelerometer resolution test requirement, thus the resolution ratio of testing acceleration meter
Whether certain to be measured level is reached.
Such as in order to judge whether accelerometer has 1 × 10-6The resolution ratio of g then needs to generate acceleration increment Delta a=1
×10-6G is applied on accelerometer, by formula (9), and is taken n=1, can be obtained:
Δ a [sin (θ+Δ θ)-sin θ]=1 × 10-6g (10)
Wherein, Δ a can be realized by changing the revolving speed of speed stabilizing platform, it is assumed that the servo-actuated platform centre of gyration is away from the revolution of speed stabilizing platform
Heart 400mm, and assume that the range of accelerometer to be measured is 10g, in order to detect the resolution ratio for judging accelerometer, in the acceleration
The half of full scale is counted, that is, 5g nearby generates required Δ gn, it is assumed that taking Δ a is 0.01g, then adds corresponding to the centrifugation of 5g
Speed output, the revolving speed of speed stabilizing platform are the centrifugal acceleration that can produce 0.01g when 634.14807 °/s changes into 634.7819 °/s
Variable quantity, at this point, incremental speed is 0.63383 °/s.According to the difference of speed stabilizing platform revolving speed, when Δ a is constant, incremental speed is different.
The specific magnitude of Δ a can be determined according to the precision of speed stabilizing platform revolving speed and its corresponding resolution ratio.Such as in the above example, Δ a
Also it can choose as 0.1g or 0.001g.
When Δ a value is 0.01g, the value of the part [sin (θ+Δ θ)-sin θ] need to be 1 × 10 in formula (10)-4, this
When, corresponding to different angle step Δ θ, corresponding angle theta need to be chosen and be just able to achieve 1 × 10-4Output valve, such as take Δ θ=
24 ", then angle theta is about 31.2191 °；Take Δ θ=50 ", then angle theta is about 65.6313 °.The selection and determination of Δ θ and θ, can
Comprehensively considered according to the conditions such as ease of the Angle Position resolution ratio of specific servo-actuated platform 2 or test process with determination.
According to above method, when Δ a value is 0.1g, [sin (θ+Δ θ)-sin θ]=1 × 10-5, can be calculated
Angle theta is about 85.0909 °；If taking Δ θ=10 ", it is about 78.1909 ° that angle theta, which can be calculated,；Take Δ θ=5 ", then may be used
It is about 65.8412 ° that angle theta, which is calculated,.
For different acceleration increment Delta a it can be seen from the above calculated result, can there are multipair angle theta and increment Delta θ
Combination can satisfy requirement, its main feature is that angle theta is bigger, then corresponding increment Delta θ when the timing of acceleration increment Delta a mono-
It is bigger, that is to say, that choose biggish angle theta, the requirement of the Angle Position resolution ratio to servo-actuated platform 2 can be reduced.
Based on above method, resolution test for high-precision accelerometer passes through Δ a and [sin (θ+Δ θ)-sin
θ] combination, acceleration increment needed for can produce high-precision accelerometer resolution test.Centrifugation is generated such as on 5g to add
Speed increment can achieve Δ a=0.001g according to current technology level, and servo-actuated 2 Angle Position resolution ratio of platform can then reach
To 0.0001 °, then when to take θ be 55.0432 °, the increment of servo-actuated 0.0001 ° of platform can produce 1 × 10-6Variable quantity, thus, Δ
A [sin (θ+Δ θ)-sin θ] can produce 1 × 10-9The acceleration increment of g, meets the test of wide range, high-precision accelerometer
It is required that.
Steps are as follows for specific method based on double measurement of centrifuge high-precision accelerometer resolution ratio:
1. being powered on, being returned to zero to servo-actuated platform 2, servo-actuated platform is made to be positioned at zero-bit；
2. accelerometer being fixed on the rotary table top of servo-actuated platform 2 by installs fixture, making the matter of accelerometer as far as possible
The line of amount center and servo-actuated 2 rotation center of platform perpendicular to servo-actuated platform 2 table top, while make the direction of accelerometer sensitive axis with
The direction of centrifugal acceleration when speed stabilizing platform 1 rotates is vertical；
3. electrical connection needed for completing accelerometer test；
4. determining acceleration increment Delta g according to the resolution ratio and its test request of accelerometer to be measurednMagnitude；
5. determining the initial centrifugation acceleration of speed stabilizing platform output, also according to the performance indicator and its requirement of accelerometer
It is a of right side of the equal sign in formula (3).And keep a constant, servo-actuated platform 2 is rotated according to corresponding angle step Δ θ, is incremented by surveys altogether
Examination 3 times or more, while recording the output U of corresponding accelerometer0n；
Similarly, it for any angle theta, keeps angle theta constant, changes turning for speed stabilizing platform according to centrifugal acceleration increment Delta a
Speed is incremented by test 3 times or more altogether, as shown in formula (6), while recording the output U of corresponding accelerometermn；
6. according to formula (7) and (8), and enabling Δ Up=(Umn-U(m-1)n)-(Um(n-1)-U(m-1)(n-1))；Solve accelerometer
Correspond to Δ g in the ideal casenInput when, ideal output increment Δ U=K* Δ gn(K be accelerometer scale because
Number)；
Multiple groups Δ U is obtained after increasing testpWhen, its average value can be taken；
7. judging whether Δ Up/ Δ U >=50% meets, if it is satisfied, then the resolution ratio of accelerometer reaches requirement.
Based on the present invention, by Δ a and { sin (θ+n Δ θ)-sin [θ+(n-1) Δ θ] } two-part synthesis with generate from
Heart acceleration increment, for the Δ g of any determinationn, all can get multiple groups can satisfy Δ gnIt is required that (Δ a, θ, Δ θ) value, root
According to the condition of product or test equipment, (a, θ, Δ θ) value of the most suitable operation of selection, flexibility with higher, and
And, it is only necessary to it can be achieved with using double centrifuges and fixture, be not necessarily to gravitational field 1g tumbling test equipment, reduce the hardware of test
Cost.
Meanwhile passing through Δ a and { sin (θ+n Δ θ)-sin [θ+(n-1) Δ θ] } two-part synthesis, generated acceleration
Degree increment can satisfy high-precision accelerometer resolution test requirement, realize test to high-precision accelerometer resolution ratio with
Calibration.Under identical resolution test requirement, the requirement to 2 positioning accuracy of 1 precision of speed stabilizing platform and servo-actuated platform is substantially reduced.
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 (10)
1. a kind of test method of accelerometer resolution ratio, which comprises the following steps:
Accelerometer is horizontally arranged on the rotary table top of the slave centrifuge of double centrifuges, wherein described to be arranged from centrifuge
On the rotary table top of the main centrifuge of double centrifuges, the main centrifuge and the equal water of the rotary table top from centrifuge
Flat setting；
The aimed acceleration incremental value that the accelerometer is chosen according to the resolution ratio calibration value of the accelerometer, according to described
Aimed acceleration incremental value chooses the main centrifuge in the target centrifugal acceleration generated from centrifuge and target
The target susceptibility shaft angle degree of centrifugal acceleration incremental value, the target susceptibility shaft angle angle value of the accelerometer and the accelerometer
Incremental value；Wherein, sensitive axes angle is the sensitive axes and the included angle of reference straight line of the accelerometer, described to refer to straight line
The line of rotation center and the rotation center from centrifuge perpendicular to the main centrifuge；
Rotation is described to make the sensitive axes angle value of the accelerometer reach the target susceptibility axis from the rotary table top of centrifuge
Angle value operates the main centrifuge according to the target centrifugal acceleration, records the first output valve of the accelerometer；
According to the target susceptibility shaft angle degree incremental value rotation rotary table top from centrifuge, the accelerometer is recorded
Second output valve；
Calculate the first output difference between second output valve and first output valve；
Rotation is described to make the sensitive axes angle value of the accelerometer reach the target susceptibility axis from the rotary table top of centrifuge
Angle value, according to the target centrifugal acceleration and the target centrifugal acceleration incremental value and value operate the main centrifugation
Machine records the third output valve of the accelerometer；
According to the target susceptibility shaft angle degree incremental value rotation rotary table top from centrifuge, the accelerometer is recorded
4th output valve；
Calculate the second output difference and the second output difference between the third output valve and the 4th output valve
Secondary difference between the first output difference；It obtains and the aimed acceleration incremental value is inputted into the accelerometer item
Idea output under part determines described add if the ratio of the secondary difference and the idea output is greater than preset value
The resolution test of speedometer passes through.
2. the test method of accelerometer resolution ratio according to claim 1, which is characterized in that the aimed acceleration increases
Magnitude, the target centrifugal acceleration incremental value, the target susceptibility shaft angle angle value and the target susceptibility shaft angle degree incremental value
Meet following relationship:
Δ g=Δ a [sin (θ+Δ θ)-sin θ]
In formula, Δ g indicates that the aimed acceleration incremental value, Δ a indicate that the target centrifugal acceleration incremental value, θ indicate institute
Target susceptibility shaft angle angle value is stated, Δ θ indicates the target susceptibility shaft angle degree incremental value.
3. the test method of accelerometer resolution ratio according to claim 1, which is characterized in that described according to the target
Acceleration incremental value is chosen the main centrifuge and is centrifuged in the target centrifugal acceleration generated from centrifuge and target
The target susceptibility axis angle step of acceleration incremental value, the target susceptibility shaft angle angle value of the accelerometer and the accelerometer
The step of value the following steps are included:
Determine that multiple groups target data, every group of target data include the target CENTRIFUGAL ACCELERATING according to the aimed acceleration incremental value
Angle value and target centrifugal acceleration incremental value, the target susceptibility shaft angle angle value and the target susceptibility shaft angle degree incremental value；
Calculate it is described second output difference and it is described first output difference secondary difference the step of the following steps are included:
The secondary difference that the second output difference and the first output difference are calculated under different groups of target datas, obtains institute
There is the average value of secondary difference；
It is the average value and the aimed acceleration that the ratio of the secondary difference and the idea output, which is greater than preset value,
The ratio of incremental value is greater than preset value.
4. the test method of accelerometer resolution ratio according to claim 3, which is characterized in that the target CENTRIFUGAL ACCELERATING
After target data described in the identical each group of angle value is arranged according to the sequence of the target susceptibility shaft angle angle value from small to large, previous group
The sum of target susceptibility shaft angle angle value and target susceptibility shaft angle degree incremental value in target data are equal in later group target data
Target susceptibility shaft angle angle value；
Alternatively, target data described in the identical each group of the target susceptibility shaft angle angle value according to the target centrifugal acceleration from
It is small to after big sequence arrangement, target centrifugal acceleration and target centrifugal acceleration incremental value in previous group target data it
With the target centrifugal acceleration being equal in later group target data.
5. the test method of accelerometer resolution ratio according to claim 1, which is characterized in that described according to the target
Acceleration incremental value is chosen the main centrifuge and is centrifuged in the target centrifugal acceleration generated from centrifuge and target
The target susceptibility axis angle step of acceleration incremental value, the target susceptibility shaft angle angle value of the accelerometer and the accelerometer
The step of value the following steps are included:
Sensitive axes angle step is determined from the Angle Position resolution ratio of centrifuge according to described.
6. the test method of accelerometer resolution ratio according to claim 1, which is characterized in that described to obtain the mesh
The step of mark acceleration incremental value inputs the idea output under the conditions of the accelerometer the following steps are included:
The idea output is obtained according to Δ U=K* Δ g, and in formula, Δ U indicates the idea output, and K indicates the acceleration
The constant multiplier of meter is spent, Δ g indicates the aimed acceleration incremental value.
7. the test method of accelerometer resolution ratio as claimed in any of claims 1 to 6, which is characterized in that institute
The mass centre of accelerometer and the line of the rotation center from centrifuge are stated perpendicular to the turntable from centrifuge
Face.
8. the test method of accelerometer resolution ratio as claimed in any of claims 1 to 6, which is characterized in that institute
State makes the sensitive axes angle value of the accelerometer reach the target susceptibility shaft angle described in rotation from the rotary table top of centrifuge
Before the step of angle value the following steps are included:
By the sensitive axes angle value zero setting of the accelerometer.
9. the test method of accelerometer resolution ratio as claimed in any of claims 1 to 6, which is characterized in that institute
Stating from centrifuge is two or more, described from the rotary table top that centrifuge is symmetrically mounted on the main centrifuge.
10. a kind of test device of accelerometer resolution ratio, which is characterized in that including double centrifuges and fixture；
Double centrifuges include main centrifuge and from centrifuge, the main centrifugation that double centrifuges are arranged in from centrifuge
On the rotary table top of machine, the main centrifuge and the rotary table top from centrifuge are horizontally disposed；The fixture setting exists
On the rotary table top from centrifuge, for being horizontally mounted accelerometer；
The aimed acceleration incremental value that the accelerometer is chosen according to the resolution ratio calibration value of the accelerometer, according to described
Aimed acceleration incremental value chooses the main centrifuge in the target centrifugal acceleration generated from centrifuge and target
The target susceptibility shaft angle degree of centrifugal acceleration incremental value, the target susceptibility shaft angle angle value of the accelerometer and the accelerometer
Incremental value；Wherein, sensitive axes angle is the sensitive axes and the included angle of reference straight line of the accelerometer, described to refer to straight line
The line of rotation center and the rotation center from centrifuge perpendicular to the main centrifuge；
Accelerometer is horizontally arranged on the rotary table top of the slave centrifuge of double centrifuges, the rotation rotation from centrifuge
Table top makes the sensitive axes angle value of the accelerometer reach the target susceptibility shaft angle angle value, according to the target CENTRIFUGAL ACCELERATING
Angle value operates the main centrifuge, records the first output valve of the accelerometer；
According to the target susceptibility shaft angle degree incremental value rotation rotary table top from centrifuge, the accelerometer is recorded
Second output valve；
Calculate the first output difference between second output valve and first output valve；
Rotation is described to make the sensitive axes angle value of the accelerometer reach the target susceptibility axis from the rotary table top of centrifuge
Angle value, according to the target centrifugal acceleration and the target centrifugal acceleration incremental value and value operate the main centrifugation
Machine records the third output valve of the accelerometer；
According to the target susceptibility shaft angle degree incremental value rotation rotary table top from centrifuge, the accelerometer is recorded
4th output valve；
Calculate the second output difference and the second output difference between the third output valve and the 4th output valve
Secondary difference between the first output difference；It obtains and the aimed acceleration incremental value is inputted into the accelerometer item
Idea output under part determines described add if the ratio of the secondary difference and the idea output is greater than preset value
The resolution test of speedometer passes through.
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| CN108107233B (en) * | 2017-12-14 | 2020-01-31 | 中国电子产品可靠性与环境试验研究所 | Method and system for continuous temperature correction of accelerometer scale factors |
| CN108196092B (en) * | 2017-12-22 | 2020-04-07 | 中国电子产品可靠性与环境试验研究所 | Calibration method and system for working radius of centrifugal machine and accelerometer calibration method |
| CN108151764B (en) * | 2017-12-27 | 2021-10-29 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | High-low temperature lock area testing device and method for laser gyroscope |
| CN108827363B (en) * | 2018-06-21 | 2023-04-07 | 闻泰通讯股份有限公司 | Sensor testing device |
| CN113566744B (en) * | 2021-07-29 | 2023-02-10 | 大连探索者科技有限公司 | High-precision testing method for resolution of photoelectric angle sensor |
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