CN104655877B - Accelerometer dynamic linearity measurement apparatus and the method for measuring accelerometer dynamic linearity - Google Patents
Accelerometer dynamic linearity measurement apparatus and the method for measuring accelerometer dynamic linearity Download PDFInfo
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- CN104655877B CN104655877B CN201510066277.9A CN201510066277A CN104655877B CN 104655877 B CN104655877 B CN 104655877B CN 201510066277 A CN201510066277 A CN 201510066277A CN 104655877 B CN104655877 B CN 104655877B
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Abstract
The invention discloses a kind of accelerometer dynamic linearity measurement apparatus and the method for measuring accelerometer dynamic linearity, the technical problem for solving existing accelerometer dynamic linearity measuring method poor practicability.Technical scheme is that measurement apparatus includes outer thick-walled pipe bullet, inner cylinder bullet and outer tube, in addition to sunk screw.The outer thick-walled pipe bullet and left end sunk screw banding after the assembling of inner cylinder bullet.Outer thick-walled pipe bullet, with after sunk screw banding, forms outer thick-walled pipe bullet concordant with inner cylinder bullet termination in preceding or outer thick-walled pipe bullet in preceding or inner cylinder bullet with inner cylinder bullet.During measurement, first step inner cylinder bullet first hits；The outer thick-walled pipe bullet of second step first hits；The outer thick-walled pipe bullet of 3rd step and inner cylinder bullet end are hit simultaneously, the single and their collective effects that acceleration pulse is readily formed at strain gauge and accelerometer are superimposed, simple to operate in measurement with same air pressure all the time, reproducible, the accurate precision for measuring accelerometer dynamic linearity is high.
Description
Technical field
The present invention relates to a kind of accelerometer dynamic linearity measurement apparatus, one kind is further related to using measurement apparatus measurement
The method of accelerometer dynamic linearity.
Background technology
Reference picture 1.Document " Akira Umeda, Method and Device for Measuring Dynamic
Linearity of Acceleration Accelerometer[P].United States Patent US2005/
0160785 A1,2005 " discloses a kind of method that dynamic linearity measurement is carried out to accelerometer with high g values.Used in this method
Device includes outer thick-walled pipe bullet 1, inner cylinder bullet 2, par 3, strain gauge 4, support member 5, accelerometer 6, outer pipe valve 7, outer tube
Source of the gas 8, interior pipe valve 9, inner tube source of the gas 10, controller 11, inner tube 12 and outer tube 13.Carry out accelerometer dynamic linearity measurement
When, par 3 is installed with accelerometer 6 first, par 3 is adjusted using support member 5.Then, inner cylinder bullet 2 is put
Enter inside inner tube 12, treat that inner tube source of the gas 10 arrives predetermined value, open interior pipe valve 9, at this moment inner cylinder bullet 2 hits the end of par 3, should
Become meter 4 and the first subpulse of sense accelerations of accelerometer 6, record the first subpulse, and record the gas used in inner tube source of the gas 10
Pressure；Second step, outer thick-walled pipe bullet 1 is put into inside outer tube 13, is treated that outer tube source of the gas 8 arrives predetermined value, is opened outer pipe valve 7, at this moment outer
Thick-walled pipe bullet 1 hits the end of par 3, strain gauge 4 and the second subpulse of sense accelerations of accelerometer 6, records second of arteries and veins
Punching, and record the air pressure used in outer tube source of the gas 8；3rd step, respective correspondence is put into by inner cylinder bullet 2 and outer thick-walled pipe bullet 1 simultaneously
Inner tube 12 and outer tube 13 inside, according to the respective default air pressure of above first step inner tube source of the gas 10 and second step outer tube source of the gas 8
Value, transmitting inner cylinder bullet 2 and outer thick-walled pipe bullet 1 are gone while reach and hit the end of par 3, at this moment strain gauge 4 and acceleration
Meter 6 has perceived the acceleration pulse of two additions.The first step and the pulse of second step accelerometer are calculated into superposition, with the double bullets of the 3rd step
The acceleration pulse measured is hit simultaneously to compare, and obtains the dynamic linearity of accelerometer.
In fact, the 3rd pacing amount operation of above measuring method is difficult to realize, i.e.,：Double bullets are made to pass through respective gas
After multiple links such as source, valve, pipeline, pipeline, controller 11 are launched, then to make two body front ends difference is zero, i.e., simultaneously
Reach and hit the end of par 3, be virtually impossible to what is realized.
For example it is assumed that material is struck behind the end of titanium alloy par 3 for two bullets of steel simultaneously, it is allowed to each comfortable par
3 or strain gauge 4 on two pulses difference for producing be 10s, if two to play speed be 10m/s, be computed, outer thick-walled pipe bullet 1 and interior
The longitudinal separation of cylinder bullet 2 difference strikes the end of par 3 no more than 0.1mm could meet requirement, and such operation requires several
It can not possibly realize.
The content of the invention
In order to overcome the shortcomings of existing accelerometer dynamic linearity measuring method poor practicability, the present invention provides a kind of add
Speedometer dynamic linearity measurement apparatus.The measurement apparatus includes outer thick-walled pipe bullet, inner cylinder bullet and outer tube, in addition to countersunk head spiral shell
Nail.The outer thick-walled pipe bullet is with outer tube to be slidably matched, and the internal diameter of outer thick-walled pipe bullet is identical with the external diameter of inner cylinder bullet, to slide
Coordinate, outer thick-walled pipe bullet and left end sunk screw banding after the assembling of inner cylinder bullet.Outer thick-walled pipe bullet and inner cylinder bullet countersunk head
After screw banding, form outer thick-walled pipe bullet and put down in preceding or inner cylinder bullet in preceding or outer thick-walled pipe bullet and inner cylinder bullet termination
Together.During measurement, first step inner cylinder bullet first hits；The outer thick-walled pipe bullet of second step first hits；The outer thick-walled pipe bullet of 3rd step and inner prop
Body bullet end is hit simultaneously, and the single and their collective effects of acceleration pulse are readily formed at strain gauge and accelerometer
Superposition, it is simple to operate in measurement with same air pressure all the time, it is reproducible, measure the accurate essence of accelerometer dynamic linearity
Degree is high.
The present invention also provides the method that accelerometer dynamic linearity is measured using above-mentioned measurement apparatus.
The technical solution adopted for the present invention to solve the technical problems is：A kind of accelerometer dynamic linearity measurement dress
Put, including outer thick-walled pipe bullet 1, inner cylinder bullet 2 and outer tube 13, it is characterized in：Also include sunk screw 14.The outer thick-walled pipe bullet
1 is to be slidably matched with outer tube 13, and the internal diameter of outer thick-walled pipe bullet 1 is identical with the external diameter of inner cylinder bullet 2, to be slidably matched, outer heavy wall
The left end banding of sunk screw 14 after pipe bullet 1 is assembled with inner cylinder bullet 2.
The material of the outer thick-walled pipe bullet 1 is high strength steel.
The material of the inner cylinder bullet 2 is high strength steel.
When the outer thick-walled pipe bullet 1 is assembled with inner cylinder bullet 2, the advanced outer 1 one length g of thick-walled pipe bullet of inner cylinder bullet 2.
When the outer thick-walled pipe bullet 1 is assembled with inner cylinder bullet 2, outer advanced 2 one length g of inner cylinder bullet of thick-walled pipe bullet 1.
When the outer thick-walled pipe bullet 1 is assembled with inner cylinder bullet 2, outer thick-walled pipe bullet 1 is concordant with the termination of inner cylinder bullet 2.
A kind of method that accelerometer dynamic linearity is measured using above-mentioned measurement apparatus, is characterized in including following step
Suddenly：
The first step, the advanced outer 1 one length g of thick-walled pipe bullet of setting inner cylinder bullet 2, left end hoops are played with sunk screw 14 by two
Tightly, then two bullets after assembling are put into inside outer tube 13, treat that outer tube source of the gas 8 rises to predetermined atmospheric pressure value, open outer pipe valve 7,
At this moment inner cylinder bullet 2 first hits the end of par 3, strain gauge 4 and the first subpulse of sense accelerations of accelerometer 6, record the
Pulsatile once, and record the air pressure used in outer tube source of the gas 8；
Second step, the outer advanced 2 one length g of inner cylinder bullet of thick-walled pipe bullet 1 of setting, left end hoops are played with sunk screw 14 by two
Tightly, then two bullets after assembling are put into inside outer tube 13, treat that outer tube source of the gas 8 reaches the predetermined atmospheric pressure value of the first step, open outer
Pipe valve 7, at this moment outer thick-walled pipe bullet 1 first hit the end of par 3, strain gauge 4 and accelerometer 6 sense accelerations, second of arteries and veins
Punching, records the second subpulse, and record the air pressure used in outer tube source of the gas 8；
3rd step, the outer thick-walled pipe bullet 1 of setting are concordant with the termination of inner cylinder bullet 2, play left end bandings by two with screw, then will
Two bullets after assembling are put into inside outer tube 13, treat that outer tube source of the gas 8, to the predetermined atmospheric pressure value of the first step, opens outer pipe valve 7, at this moment outer
Thick-walled pipe bullet 1 hits the end of par 3 simultaneously with inner cylinder bullet 2, and strain gauge 4 and accelerometer 6 perceive synchronous outer thick-walled pipe
The acceleration third time pulse that 2 liang of bullets of bullet 1 and inner cylinder bullet are superimposed, records third time pulse, and record used in outer tube source of the gas 8
Air pressure；
4th step, according to dynamic accelerometer linearity computational methods, the accelerometer arteries and veins that the first step and second step are obtained
Punching is overlapped after calculating, and the acceleration pulse ratio measured is acted on simultaneously with thick-walled pipe bullet 1 outside the 3rd step and 2 liang of bullets of inner cylinder bullet
Difference is relatively tried to achieve, the dynamic linearity of accelerometer is obtained.
The beneficial effects of the invention are as follows：The measurement apparatus includes outer thick-walled pipe bullet, inner cylinder bullet and outer tube, in addition to countersunk head
Screw.The outer thick-walled pipe bullet is with outer tube to be slidably matched, and the internal diameter of outer thick-walled pipe bullet is identical with the external diameter of inner cylinder bullet, for cunning
It is dynamic to coordinate, outer thick-walled pipe bullet and left end sunk screw banding after the assembling of inner cylinder bullet.Outer thick-walled pipe bullet uses heavy with inner cylinder bullet
After head screw banding, outer thick-walled pipe bullet is formed in preceding or inner cylinder bullet in preceding or outer thick-walled pipe bullet and inner cylinder bullet termination
Concordantly.During measurement, first step inner cylinder bullet first hits；The outer thick-walled pipe bullet of second step first hits；The outer thick-walled pipe bullet of 3rd step and interior
Cylinder bullet end is hit simultaneously, and the single and their common works of acceleration pulse are readily formed at strain gauge and accelerometer
It is simple to operate in measurement with same air pressure all the time with superposition, it is reproducible, measure the accurate of accelerometer dynamic linearity
Precision is high.
The present invention is described in detail below in conjunction with drawings and examples.
Brief description of the drawings
Fig. 1 is the schematic diagram of background technology method equipment therefor.
Fig. 2 is the schematic diagram of accelerometer dynamic linearity measurement apparatus of the present invention.
Fig. 3-1 is the correlation schematic diagram of inner cylinder bullet and outer thick-walled pipe bullet when inner cylinder bullet first hits in Fig. 2.
Fig. 3-2 is the correlation schematic diagram of inner cylinder bullet and outer thick-walled pipe bullet when Fig. 2 China and foreign countries thick-walled pipe bullet first hits.
Fig. 3-3 is that Fig. 2 China and foreign countries thick-walled pipe bullet is concordant with inner cylinder bullet end while hitting schematic diagram.
In figure, the outer thick-walled pipe bullets of 1-；2- inner cylinder bullets；3- pars；4- strain gauges；5- support members；6- accelerometers；7-
Outer pipe valve；8- outer tube sources of the gas；Pipe valve in 9-；10- inner tube sources of the gas；11- controller 12- inner tubes；13- outer tubes；14- sunk screws.
Embodiment
2~3-3 of reference picture.The present invention uses a diameter 30mm length 1200mm titanium alloys bar as par 3, coarse
Spend for 0.8, and axiality and linearity are in 0.05mm deviations at every meter.The 400mm of range acceleration meter 6 on par 3
120 ohm of foil gauges two are pasted at place, and accelerometer 6 to be measured is pasted onto into the rod end coaxial position of par 3；Using internal diameter
30mm length 1000mm stainless steel tube is as outer tube 13, grinding and polishing inside pipe, and axiality and linearity are at every meter
In 0.05mm deviations.By the V-groove support member 5 of adjustable position by outer tube 13 and the mounting and adjusting of par 3 on a platform
On coaxial concentric line, it is outer pipe valve that a manual quick response opening valve for importing and exporting bore 30mm is connected at the rear portion of outer tube 13
7, the metal tube for being then 30mm with internal diameter using outer pipe valve 7 and an air chamber connection are used as source of the gas 8, pressure-resistant 1MPa.Outer thick-walled pipe
Bullet 1 and inner cylinder bullet 2 use high strength steel, and the external diameter of outer thick-walled pipe bullet 1 is to be slidably matched as the internal diameter of outer tube 13, length
30mm, the internal diameter of outer thick-walled pipe bullet 1 is identical with the external diameter of inner cylinder bullet 2, with lubricating oil to be slidably matched between them, by two bodies
Rigging position uses the banding of sunk screw 14 as requested, is put into after outer tube 13, when the pressure of source of the gas 8 to predetermined value, opens outer pipe valve
7, two bodies, which are just launched, strikes par 3.
The method for measuring accelerometer dynamic linearity using above-mentioned measurement apparatus is comprised the following steps that：
The first step：See Fig. 3-1 figures, it is 3mm to set the advanced outer 1 one length g of thick-walled pipe bullet of inner cylinder bullet 2, uses countersunk head spiral shell
Nail 14 plays left end banding by two, is then placed in inside outer tube 13, when outer tube source of the gas 8 is raised to predetermined value 0.2MPa, opens outer tube
Valve 7, at this moment inner cylinder bullet 2 first hit the end of par 3, strain gauge 4 and the first subpulse of sense accelerations of accelerometer 6, record
First subpulse, and record the air pressure used in outer tube source of the gas 8；
Second step：See Fig. 3-2 figures, it is 3mm to set outer advanced 2 one length g of inner cylinder bullet of thick-walled pipe bullet 1, uses countersunk head spiral shell
Nail 14 plays left end banding by two, is then placed in inside outer tube 13, treats that outer tube source of the gas 8 is raised to predetermined value 0.2MPa set by the first step
When, outer pipe valve 7 is opened, at this moment outer thick-walled pipe bullet 1 first hits the end of par 3, strain gauge 4 and the sense accelerations of accelerometer 6 the
Second pulse, records the second subpulse, and record the air pressure used in outer tube source of the gas 8；
3rd step；See Fig. 3-3 figures, set outer thick-walled pipe bullet 1 concordant with the termination of inner cylinder bullet 2, be i.e. g is 0mm, will with screw
Two play left end banding, are then placed in inside outer tube 13, when outer tube source of the gas 8 is raised to predetermined value 0.2MPa set by the first step, open
Outer pipe valve 7, at this moment outer thick-walled pipe bullet 1 and inner cylinder bullet 2 are while hit the end of par 3, strain gauge 4 and accelerometer 6 are perceived
The acceleration third time pulse that synchronous outer thick-walled pipe bullet 1 is superimposed with 2 liang of bullets of inner cylinder bullet, records third time pulse, and record outer
Air pressure used in pipe source of the gas 8；
4th step；According to dynamic accelerometer linearity computational methods, the accelerometer arteries and veins that the first step and second step are obtained
Rush in after row is calculated and be superimposed, the acceleration measured is acted on simultaneously with thick-walled pipe bullet 1 outside the 3rd step and 2 liang of bullets of inner cylinder bullet
Pulse ratio relatively tries to achieve difference, just can obtain the dynamic linearity of accelerometer.
Claims (7)
1. a kind of accelerometer dynamic linearity measurement apparatus, including outer thick-walled pipe bullet (1), inner cylinder bullet (2), par (3),
Strain gauge (4), support member (5), accelerometer (6), outer pipe valve (7), outer tube source of the gas (8) and outer tube (13), it is characterised in that：Also
Including sunk screw (14)；Strain gauge (4) is pasted on par (3), accelerometer (6) to be measured is pasted onto par (3)
Front end coaxial position, support member (5) is by outer tube (13) and par (3) mounting and adjusting in the position of coaxial line, outer tube
(13) rear portion is sequentially connected outer pipe valve (7) and outer tube source of the gas (8) by metal tube；The outer thick-walled pipe bullet (1) and outer tube
(13) to be slidably matched, the internal diameter of outer thick-walled pipe bullet (1) is identical with the external diameter of inner cylinder bullet (2), to be slidably matched, outer thick-walled pipe
Bullet (1) and left end sunk screw (14) banding after inner cylinder bullet (2) assembling.
2. accelerometer dynamic linearity measurement apparatus according to claim 1, it is characterised in that：The outer thick-walled pipe bullet
(1) material is high strength steel.
3. accelerometer dynamic linearity measurement apparatus according to claim 1, it is characterised in that：The inner cylinder bullet
(2) material is high strength steel.
4. accelerometer dynamic linearity measurement apparatus according to claim 1, it is characterised in that：The outer thick-walled pipe bullet
(1) when being assembled with inner cylinder bullet (2), the termination of the advanced outer thick-walled pipe bullet (1) in termination of inner cylinder bullet (2).
5. accelerometer dynamic linearity measurement apparatus according to claim 1, it is characterised in that：The outer thick-walled pipe bullet
(1) when being assembled with inner cylinder bullet (2), the termination of the advanced inner cylinder bullet (2) in termination of outer thick-walled pipe bullet (1).
6. accelerometer dynamic linearity measurement apparatus according to claim 1, it is characterised in that：The outer thick-walled pipe bullet
(1) when being assembled with inner cylinder bullet (2), outer thick-walled pipe bullet (1) is concordant with inner cylinder bullet (2) termination.
7. the method that measurement apparatus described in a kind of utilization claim 1 measures accelerometer dynamic linearity, it is characterised in that bag
Include following steps：
The first step, set inner cylinder bullet (2) the advanced outer thick-walled pipe bullet (1) in termination termination, with sunk screw (14) by two bullets
Then two bullets after assembling are put into outer tube (13) inside, treat that outer tube source of the gas (8) rises to predetermined atmospheric pressure value, beat by left end banding
Over pipe valve (7), at this moment inner cylinder bullet (2) first hit par (3) end, strain gauge (4) and accelerometer (6) are perceived and accelerated
The first subpulse is spent, the first subpulse is recorded, and record the air pressure used in outer tube source of the gas (8)；
Second step, set outer thick-walled pipe bullet (1) the advanced inner cylinder bullet (2) in termination termination, with sunk screw (14) by two bullets
Then two bullets after assembling are put into outer tube (13) inside, treat that outer tube source of the gas (8) reaches the predetermined air pressure of the first step by left end banding
Value, opens outer pipe valve (7), and at this moment outer thick-walled pipe bullet (1) first hits par (3) end, strain gauge (4) and accelerometer (6)
The subpulse of sense accelerations second, records the second subpulse, and record the air pressure used in outer tube source of the gas (8)；
3rd step, the outer thick-walled pipe bullet (1) of setting are concordant with inner cylinder bullet (2) termination, and left end hoops are played by two with sunk screw (14)
Tightly, two bullets after assembling are then put into outer tube (13) inside, treat that outer tube source of the gas (8), to the predetermined atmospheric pressure value of the first step, is opened
Outer pipe valve (7), at this moment outer thick-walled pipe bullet (1) and inner cylinder bullet (2) are while shock par (3) end, strain gauge (4) and acceleration
Degree meter (6) perceives the acceleration third time pulse that synchronous outer thick-walled pipe bullet (1) is superimposed with the bullet of inner cylinder bullet (2) two, records the
Three subpulses, and record the air pressure used in outer tube source of the gas (8)；
4th step, according to dynamic accelerometer linearity computational methods, the accelerometer pulsimeter that the first step and second step are obtained
It is overlapped after calculation, the acceleration pulse ratio measured is acted on simultaneously with thick-walled pipe bullet (1) outside the 3rd step and the bullet of inner cylinder bullet (2) two
Difference is relatively tried to achieve, the dynamic linearity of accelerometer is obtained.
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| CN201510066277.9A CN104655877B (en) | 2015-02-09 | 2015-02-09 | Accelerometer dynamic linearity measurement apparatus and the method for measuring accelerometer dynamic linearity |
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| CN104655877B true CN104655877B (en) | 2017-10-13 |
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| CN110187145B (en) * | 2019-06-04 | 2021-06-08 | 西北工业大学 | Device and method for calibrating accelerometer by utilizing wide pulse generated by variable cross-section bullet beam |
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| JP4304326B2 (en) * | 2002-03-29 | 2009-07-29 | 独立行政法人産業技術総合研究所 | Method and apparatus for measuring dynamic linearity of acceleration sensor |
| JP4304327B2 (en) * | 2002-03-29 | 2009-07-29 | 独立行政法人産業技術総合研究所 | Method and apparatus for measuring frequency characteristics of acceleration sensor |
| JP4304325B2 (en) * | 2002-03-29 | 2009-07-29 | 独立行政法人産業技術総合研究所 | Acceleration sensor calibration evaluation method and apparatus |
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Non-Patent Citations (1)
| Title |
|---|
| 高g值加速度传感器校准系统的研究;李玉龙 等;《爆炸与冲击》;19970131;第17卷(第1期);第90-96页 * |
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