CN1241022C - Mirco accelerometer electromagnetic calibrating apparatus and method - Google Patents
Mirco accelerometer electromagnetic calibrating apparatus and method Download PDFInfo
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- CN1241022C CN1241022C CN 02156508 CN02156508A CN1241022C CN 1241022 C CN1241022 C CN 1241022C CN 02156508 CN02156508 CN 02156508 CN 02156508 A CN02156508 A CN 02156508A CN 1241022 C CN1241022 C CN 1241022C
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Abstract
The present invention relates to a micro accelerometer calibration device and a method thereof, which is used for calibrating micro accelerometers. The calibration device comprises a signal source, a signal controller, an impact loading device and an output signal processing device, wherein the signal source is connected with the signal controller, and signals of the signal source are controlled by the signal controller and are input to the impact loading device. A micro accelerometer to be calibrated is arranged above the impact loading device, and the micro accelerometer is connected with the output signal device. The signals output by the micro accelerometer are measured, measurement values are contrasted with an electric current signal input in the step b and are calculated, and thus, the micro accelerometer can be calibrated. Specific acceleration can be directly applied to the micro accelerometer by controlling the electric current of the impact loading device, and thus, sensitivity can be directly obtained by contrasting the output signals of the micro accelerometer.
Description
Technical field
The present invention relates to a kind of calibrating installation and method thereof, relate in particular to a kind of micro-acceleration gauge shock calibration devices and methods therefor.
Background technology
At present, shock calibration about accelerometer response, international standard ISO 5347/0-1987 and standard GB/T13823.1-93 are that total velocity variable is started with from measure the shock calibration process, accelerometer to be calibrated is directly installed on can be along on the hammering block of guide piece (as guide rail or guide cylinder) motion, when hammering block is subjected to the impact force action of charger, from the static acceleration mode that changes over to, be exactly total its end speed that finally reaches by the pulse acceleration form velocity variable.The speed that hammering block obtains in the collision process is the direct result that is subjected to the acceleration effect, therefore can get the change amount of speed to integrated acceleration,
Δ u is the rapid change amount in the formula, t
1Be the moment that begins to collide, t
2For finishing the moment of collision, a (t) is the time dependent function of acceleration.
The output voltage e (t) of accelerometer is
e(t)＝Sa(t) (2)
S is by the sensitivity of school accelerometer in the formula.
By (1), (2) two formulas can get
The device that is adopted has ballistic pendulum, drops hammer, Hopkinson (Hopkinson) bar, gas big gun etc., and these device volumes are huger, can't accurately control the pulsewidth and the amplitude of acceleration, and need well-equipped velocity-measuring system, installs and uses very inconvenient.
Summary of the invention
The object of the present invention is to provide a kind of micro-acceleration gauge shock calibration devices and methods therefor, for the calibration of micro-acceleration gauge provides a kind of convenient and reliable electromagnetic calibration method and device simple in structure, thus the sensitivity that under the situation that does not need measuring speed, directly draws micro-acceleration gauge.
Electromagnetic calibration method of the present invention directly applies specific acceleration to micro-acceleration gauge by the electric current of control impact loading device, thereby can directly obtain sensitivity by the output signal of contrast micro-acceleration gauge.
In the electromagnetism basic theories, current-carrying coil is subjected to electromagnetic force in uniform magnetic field, and the size of electromagnetic force is directly proportional with electric current, that is:
F∝I (4)
F is an electromagnetic force in the formula, and I is the electric current by coil.Go to promote by the school micro-acceleration gauge with this electromagnetic force, the acceleration of micro-acceleration gauge acquisition is so:
M is by the quality of school micro-acceleration gauge in the formula, and M is coil, the coil brace of calibrating installation, the quality summation of article carrying platform.
So can draw, be directly proportional by school micro-acceleration gauge acceleration that is subjected to and the electric current that is applied, that is:
a∝I (6)
Size by Control current just can be controlled the acceleration that applies by the school micro-acceleration gauge.
If, be V by the output signal of school micro-acceleration gauge applying under the situation that acceleration is a
Out, so just can directly obtain sensitivity and be according to following formula:
Signal controller applies specific signal to the coil of electromagnetic type micro-acceleration meter calibrating impact loading device, and the size of signal is represented the size of acceleration.After demarcating, can determine this corresponding relation.Current-carrying coil is acted in the magnetic field by electromagnetic force to move, and drives by coil brace and article carrying platform and is moved by the school micro-acceleration gauge.Micro-acceleration gauge is subjected to the effect of acceleration to produce signal, is amplified into transient waveform memory through amplifier.The output signal of contrast micro-acceleration gauge and the acceleration that applies just can directly obtain by the sensitivity of school micro-acceleration gauge.Because coil brace, article carrying platform and very little by the quality of school micro-acceleration gauge only are several grams, so very little electromagnetic force just can obtain bigger acceleration.
Specifically, the invention discloses a kind of micro-acceleration gauge calibrating installation, this device comprises: signal source, signal controller, impact loading device and output signal processing device, signal source links to each other with signal controller, the signal of signal source is controlled by signal controller, be input to impact loading device, desire calibration micro-acceleration gauge is installed on the impact loading device, and impact loading device links to each other with the output signal device.
Described output signal processing device comprises transient waveform memory, signal amplifier, and impact loading device is exported a signal, through transient waveform memory and signal amplifier, but output one measuring-signal.
Described signal is a current pulse signal.
Described impact loading device is an electromagnetic spool device.
Described impact loading device comprises magnetic cylinder, coil, coil brace, article carrying platform, and coil is wrapped in the periphery of coil brace, and coil brace and article carrying platform are fixed with one, and is mounted on the internal magnetic pole of magnetic cylinder.
The invention also discloses a kind of micro-acceleration gauge calibration steps, may further comprise the steps:
1) micro-acceleration gauge is positioned on the impact loading device;
2) import a current signal for impact loading device;
3) signal of micro-acceleration gauge output is measured;
4) will measure numerical value and carry out corresponding, calculating with step 2 input one current signal;
5) demarcate micro-acceleration gauge.
The signal of described signal source is controlled amplitude and the pulsewidth that is meant control signal by signal controller.
Described step 2) also comprises before input signal is controlled.
The described amplitude and the pulsewidth that are meant input signal controlled controlled.
Described step 2) current signal for the impact loading device input in is a pulse signal.
The signal of micro-acceleration gauge output is a pulse signal in the described step 3).
Measure in the described step 3) and comprise signal is carried out processing and amplifying, storage.
Corresponding in the described step 4), calculating comprises: the gross mass of the coil of (1) measurement micro-acceleration gauge and impact loading device, coil brace, article carrying platform; (2) be defined as the size of current signal of impact loading device input and the corresponding relation of micro-acceleration gauge acceleration magnitude; (2) calculate the size of output signal and the ratio of acceleration magnitude.
Owing to adopt the electromagnetism load mode, make the size of calibrating installation dwindle greatly, can carry, this is that other calibrating installations can't be accomplished at present.Owing to can come the pulsewidth and the amplitude of accurate control loaded waveform by the control loaded electric current, thus can adapt to different free-running frequences, different ranges the calibration needs of micro-acceleration gauge, can not cause self-excitation.And calibration accuracy height, data processing are very convenient.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments
Fig. 1 is a micro-acceleration gauge electromagnetic calibration device work synoptic diagram;
Fig. 2 is an electromagnetic type micro-acceleration meter calibrating impact loading device structural drawing.
Embodiment
Micro-acceleration gauge electromagnetic calibration device shown in Figure 1 comprises electromagnetic type micro-acceleration meter calibrating impact loading device 6, signal source 10, signal controller 9 and amplifier 7, transient waveform memory 8.
Electromagnetic type micro-acceleration meter calibrating impact loading device structure is seen accompanying drawing 2, comprising: 1-coil, 2-article carrying platform, 3-coil brace, 4-magnetic cylinder.Wherein article carrying platform 2 and coil brace 3 are fixed with one, and are mounted on the internal magnetic pole of magnetic cylinder 4, can the easy on and off motion.
To be installed on the article carrying platform 2 of electromagnetic type micro-acceleration meter calibrating impact loading device 6 by school micro-acceleration gauge 5.Applied shock load with 6 pairs of signal controller 9 control electromagnetic type micro-acceleration meter calibrating impact loading devices by school micro-acceleration gauge 5.Because it is proportional between the loading current of signal controller 9 and the acceleration that micro-acceleration gauge 5 is subjected to, therefore can through and demarcation the corresponding relation of determining between loading current I and the acceleration a, and can control the pulsewidth of acceleration by the pulsewidth of control loaded electric current.
To be noted with transient waveform memory through amplifier by the signal of school micro-acceleration gauge.Utilize formula (4) just can obtain then by the sensitivity of school micro-acceleration gauge.
This calibration steps and device are invented at the micro-acceleration meter calibrating.Because accelerometer develops to microminiaturized direction at present, therefore the calibration of micro-acceleration gauge from now on will inevitably become pressing issues.The present invention can regulate the amplitude of acceleration and the pulsewidth calibration needs with the micro-acceleration gauge that adapts to different size easily, has greatly improved calibration accuracy.And the calibrating installation volume is little, in light weight, can carry, and is easy to install.
Claims (13)
1. micro-acceleration gauge calibrating installation, be used to calibrate micro-acceleration gauge, it is characterized in that, this device comprises: signal source, signal controller, impact loading device and output signal processing device, signal source links to each other with signal controller, and the signal of signal source is controlled by signal controller, is input to impact loading device, be calibrated micro-acceleration gauge and be installed on the impact loading device, micro-acceleration gauge links to each other with the output signal device.
2. micro-acceleration gauge calibrating installation according to claim 1, it is characterized in that described output signal processing device comprises transient waveform memory, signal amplifier, impact loading device is exported a signal, through signal amplifier and transient waveform memory, but obtain a measuring-signal.
3. micro-acceleration gauge calibrating installation according to claim 1 and 2 is characterized in that, described signal is a current pulse signal.
4. micro-acceleration gauge calibrating installation according to claim 1 is characterized in that, described impact loading device is an electromagnetic spool device.
5. micro-acceleration gauge calibrating installation according to claim 1, it is characterized in that, described impact loading device comprises magnetic cylinder, coil, coil brace, article carrying platform, coil is wrapped in the periphery of coil brace, coil brace and article carrying platform are fixed with one, and are mounted on the internal magnetic pole of magnetic cylinder.
6. micro-acceleration gauge calibrating installation according to claim 1 is characterized in that, the signal of described signal source is controlled amplitude and the pulsewidth that is meant control signal by signal controller.
7. a calibration steps that adopts the described micro-acceleration gauge calibrating installation of claim 1 is characterized in that, this method may further comprise the steps:
A. micro-acceleration gauge is positioned on the impact loading device;
B. import a current signal for impact loading device;
C. the signal of micro-acceleration gauge output is measured;
D. will measure numerical value and carry out corresponding, calculating with the current signal of step b input;
E. demarcate micro-acceleration gauge.
8. according to the described micro-acceleration gauge calibration steps of claim 7, it is characterized in that, also comprise before the described step b input signal is controlled.
9. micro-acceleration gauge calibration steps according to claim 8 is characterized in that, the described amplitude and the pulsewidth that are meant input signal controlled controlled.
10. micro-acceleration gauge calibration steps according to claim 7 is characterized in that, the current signal for the impact loading device input among the step b is a pulse signal.
11. micro-acceleration gauge calibration steps according to claim 7 is characterized in that, the signal of micro-acceleration gauge output is a pulse signal among the step c.
12. micro-acceleration gauge calibration steps according to claim 7 is characterized in that, described measurement comprises carries out processing and amplifying, storage with signal.
13. micro-acceleration gauge calibration steps according to claim 7 is characterized in that, described correspondence, calculating comprise: the gross mass of the coil of (1) measurement micro-acceleration gauge and impact loading device, coil brace, article carrying platform; (2) be defined as the size of current signal of impact loading device input and the corresponding relation of micro-acceleration gauge acceleration magnitude; (2) calculate the size of output signal and the ratio of acceleration magnitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02156508 CN1241022C (en) | 2002-12-16 | 2002-12-16 | Mirco accelerometer electromagnetic calibrating apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02156508 CN1241022C (en) | 2002-12-16 | 2002-12-16 | Mirco accelerometer electromagnetic calibrating apparatus and method |
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| Publication Number | Publication Date |
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| CN1508549A CN1508549A (en) | 2004-06-30 |
| CN1241022C true CN1241022C (en) | 2006-02-08 |
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| CN 02156508 Expired - Fee Related CN1241022C (en) | 2002-12-16 | 2002-12-16 | Mirco accelerometer electromagnetic calibrating apparatus and method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411066A (en) * | 2011-11-25 | 2012-04-11 | 河南柴油机重工有限责任公司 | Calibration device of triaxial acceleration sensor and calibration method thereof |
| TWI479154B (en) * | 2013-02-04 | 2015-04-01 | King Yuan Electronics Co Ltd | A connecting rods dynamic testing machine and a testing equipment using the same |
| CN105842483A (en) * | 2016-06-16 | 2016-08-10 | 重庆建设工业(集团)有限责任公司 | Triaxial accelerometer sensitivity measurement method |
| CN109991442A (en) * | 2017-12-30 | 2019-07-09 | 大连良华科技有限公司 | A kind of acceleration transducer for exempting from temperature-compensating |
| CN109001491B (en) * | 2018-07-26 | 2021-01-15 | 北京卫星环境工程研究所 | Micro-vibration magnitude acceleration sensor calibration device |
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