CN101598619A - The calibration steps of pressure sensor acceleration effect and calibrating installation - Google Patents
The calibration steps of pressure sensor acceleration effect and calibrating installation Download PDFInfo
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- CN101598619A CN101598619A CNA2009100745920A CN200910074592A CN101598619A CN 101598619 A CN101598619 A CN 101598619A CN A2009100745920 A CNA2009100745920 A CN A2009100745920A CN 200910074592 A CN200910074592 A CN 200910074592A CN 101598619 A CN101598619 A CN 101598619A
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Abstract
The calibration steps of disclosed pressure sensor acceleration effect and calibrating installation belong to the pressure transducer technical field, this calibration steps is: by applying the different pressure of series and adopting Hopkinson bar to produce corresponding different series excitation acceleration pulse and encourage this pressure transducer, record this pressure transducer different series excitation acceleration effect by the testing tool correspondence, thus the sensitivity that draws acceleration under the pressured state; Its calibrating installation by Hopkinson bar with and the waveform shaper installed of bar front end face, enclosure-type pressure applicator that terminal surface is installed and sealing formula pressure applicator on the pressure transducer that is calibrated, the grating installed form; Advantage has: the calibration steps of this pressure sensor acceleration effect and calibrating installation have been started not damage under the sensor situation again at dynamic condition, at high-amplitude duty pressure, high acceleration pressure transducer have been calibrated, solved a technical barrier in this field, calibration steps of the present invention and calibrating installation are worth adopting and promoting.
Description
One. technical field
The calibration steps of pressure sensor acceleration effect disclosed by the invention and calibrating installation belong to the pressure transducer technical field, be specifically related to a kind of calibration steps and calibrating installation of pressure sensor acceleration effect, that is to say the calibration steps and the device of the acceleration sensitivity of this pressure transducer.
Two. background technology
The calibration steps of pressure transducer is a lot, but the technical indicator on the instructions that the acceleration effect of pressure transducer and producer provide is differentiated, especially under the dynamic condition, the acceleration effect of pressure transducer can have much influences to the output of pressure transducer, rarely seen always at home and abroad report.Nowadays under a lot of situations of field tests, pressure transducer all uses under dynamic condition or high acceleration, this moment, whether the acceleration effect of pressure transducer was influential to its force value that measures, how this analyzes from value, obviously be a problem demanding prompt solution, can not take into account the defective of high-amplitude duty pressure and high acceleration simultaneously for overcoming other calibration steps, and do not damage sensor when high pressure is calibrated, we have studied calibration steps involved in the present invention and have designed calibrating installation of the present invention.
Three. summary of the invention
The objective of the invention is: calibration steps and calibrating installation that this pressure sensor acceleration effect is provided to society.The advantage of this calibration steps and calibrating installation is: can not damage the sensor that is calibrated again and implement calibration operation under high pressure amplitude and high acceleration situation.
Technical scheme of the present invention comprises the calibration steps of pressure sensor acceleration effect and the technology contents of calibrating installation two aspects, and concrete technical scheme is as follows:
Calibration steps about this pressure sensor acceleration effect, it is the calibration steps of pressure sensor acceleration sensitivity, technical characterstic is: the calibration steps of described this pressure sensor acceleration effect is: on the pressure-based that the pressure transducer that is calibrated is applied the calibration needs, adopt Hopkinson bar to produce the excitation acceleration pulse again and encourage this pressure transducer, by test or gauging instrument, record the excitation acceleration of this pressure transducer, by applying the different pressure of series and adopting Hopkinson bar to produce corresponding different series excitation acceleration pulse and encourage this pressure transducer, correspondence records this pressure transducer different series excitation acceleration effect, the sensitivity that never isonomic acceleration calibration effect just draws acceleration under this pressure transducer pressured state that is calibrated.The described different pressure of series that applies promptly is to apply the inferior different pressure of a series of levels, as the pressure of the differential pressure of a series of differences, a series of different successives.Described Hopkinson bar produce corresponding different series excitation acceleration pulse promptly be in time different pressure of a series of levels of applying of correspondence during each pressure Hopkinson bar produce the differences excitation acceleration pulses of corresponding a series of levels time, under the inferior different excitation acceleration pulse effect of a series of levels, the excitation acceleration pulse that will make Hopkinson bar produce corresponding different series is made test usefulness.
Calibration steps according to above-described pressure sensor acceleration effect, technical characterstic also has: the calibration steps of described this pressure sensor acceleration effect also has: adopt the enclosure-type pressure applicator that the pressure transducer that is calibrated is applied the pressure that calibration needs, the pressure transducer that is calibrated is installed on the pressure transducer seat of sealing formula pressure applicator, in the enclosure-type pressure applicator, fill the pressure that calibration needs with source of the gas, the pressure that needs is selected 50～450Mpa (pressure increases progressively one by one) usually, by pressure applicator steel body, sealed steel ball, sealing bolt seals it, under certain pressure condition that the pressure transducer that is calibrated is applied the calibration needs, adopt Hopkinson bar to produce series level time excitation acceleration pulse again and encourage this pressure transducer, by test or gauging instrument, record the series excitation acceleration of this pressure transducer correspondence, correspondence records this pressure sensor acceleration effect under certain pressure.Described enclosure-type pressure applicator is then sealed it by pressure applicator steel body, sealed steel ball and bolt by the gas that pneumatic supply (using air pump) applies the different pressures that needs.
Calibration steps according to above-described pressure sensor acceleration effect, technical characterstic also has: the calibration steps of described this pressure sensor acceleration effect also has: adopt series level time pressure gas (for example to adopt the pressure gas of 0.06～0.12MPa, pressure increases progressively one by one) promote the waveform shaper that body vertically clashes into the Hopkinson bar front end, make and produce the inferior pressure driving pulse of answering of series level in the Hopkinson bar, these series levels time are answered the excitation of pressure driving pulse to be connected or are installed in the pressure transducer that is calibrated on the enclosure-type pressure applicator of exerting pressure of this Hopkinson bar terminal surface, pressure transducer by time driving pulse excitation of series level obtains corresponding serial accelerated motion, after tested or the laser interferometer of metering by being arranged on grating on the enclosure-type pressure applicator or/and the corresponding series acceleration that the pressure transducer that charge amplifier test or metering are calibrated obtains, calculate the acceleration effect of the pressure transducer that is calibrated under certain pressure.The structure example of described this Hopkinson bar is as selecting length 1600mm, diameter 25mm.
Calibration steps according to above-described pressure sensor acceleration effect, technical characterstic also has: the laser interferometer of after tested described or metering is by being arranged on grating on the enclosure-type pressure applicator or/and the acceleration that the pressure transducer that charge amplifier test or metering are calibrated obtains, the method that calculates the acceleration effect of the pressure transducer that is calibrated is: according to Doppler effect, the pressure transducer movement velocity v (t) that is calibrated is directly proportional with Doppler's instantaneous frequency Δ f (t) of driving pulse:
(1) λ is an optical maser wavelength in the formula, and θ is an angle of diffraction; Carrying out conversion gets speed v (t) and Doppler's instantaneous frequency Δ f (t) mathematical relation and is:
(2) d is a grating constant in the formula, and m, n are diffraction progression, obtains instantaneous frequency Δ f (t), can obtain real-time speed v (t), can get acceleration a (t) to speed one subdifferential; Perhaps, by the relational expression of pattern displacement d (t) with speed v (t):
Obtain the displacement d (t) in (3) formula, carry out once, second differential get final product speed and acceleration; And the pressure of the pressure transducer that is calibrated is known, so just obtains or draw the acceleration of the pressure transducer excited target under pressured state that is calibrated.Described (1), (2), (3) formula provide different formulas, method or the approach of the acceleration of calculation pressure sensor under the different parameters situation, all can adopt it.
Calibration steps according to above-described pressure sensor acceleration effect, technical characterstic also has: the different series excitation acceleration pulse that the pressure transducer that is calibrated is applied the different pressure of series and adopt Hopkinson bar to produce correspondence by the enclosure-type pressure applicator encourages this pressure transducer, correspondence records this pressure transducer different series excitation acceleration effect, the sensitivity that just draws this pressure sensor acceleration that is calibrated from the acceleration calibration result or the effect of this different series.The sensitivity of the described pressure sensor acceleration that this is calibrated should never isonomic acceleration calibration result or the effect statistics in draw.
Calibrating installation about this pressure sensor acceleration effect, be the calibrating installation of pressure sensor acceleration sensitivity, technical characterstic is: the pressure transducer that is calibrated, the grating installed on enclosure-type pressure applicator that the waveform shaper that the calibrating installation of described this pressure sensor acceleration effect is installed by Hopkinson bar and Hopkinson bar front end face, Hopkinson bar terminal surface are installed and the sealing formula pressure applicator are formed.Described this cover calibrating installation simplicity of design, structure practicality.
Calibrating installation according to above-described pressure sensor acceleration effect, technical characterstic also has: the structure of the enclosure-type pressure applicator of described this calibrating installation is: sealing formula pressure applicator front end face can form that plane contact is installed, its rear end is mount pad with the Hopkinson bar terminal surface and the pressure transducer that is calibrated is installed, is filled pressure that calibration needs and by pressure applicator steel body and sealing bolt it is sealed in sealing formula pressure applicator by source of the gas, is equipped with to test at the side plane of sealing formula pressure applicator and uses grating.Described enclosure-type pressure applicator applies the gas of the different pressures that needs by pneumatic supply (using air pump), then by pressure applicator steel body, sealed steel ball, sealing bolt it is sealed, and the common range of choice of pressure that needs is 50～450Mpa (pressure increases progressively one by one).
Calibrating installation according to above-described pressure sensor acceleration effect, technical characterstic also has: the structure of the Hopkinson bar of described this calibrating installation is: the structure example of described this Hopkinson bar is as selecting length 1600mm, diameter 25mm, this Hopkinson bar front end face is equipped with the waveform shaper of band waveform adjusting pad, this waveform adjusting pad be received in pressure gas promote body down vertically clash into and make generation one in the Hopkinson bar answer the pressure driving pulse by collision body, the Hopkinson bar terminal surface fix or be equipped with the enclosure-type pressure applicator and on the pressure transducer that is calibrated, described body is the projectile that pressure gas promotes or launches, as body is the projectile that is promoted or launched by pressure gas (for example adopt the pressure gas of 0.06～0.12MPa, pressure can increase progressively one by one) in power valve.The palpus sealing is filled with the pressure transducer that is calibrated and calibrates the pressure that needs in the enclosure-type pressure applicator.Described waveform shaper is exactly the waveform adjusting pad, can be made by materials such as aluminium, copper, teflon, and the structure of this waveform adjusting pad can be selected aluminium pad, copper packing, teflon pad etc.
According to the calibrating installation of above-described pressure sensor acceleration effect, technical characterstic also has: the supplementary instrument that the calibrating installation of described this pressure sensor acceleration effect need be tested or measure has: laser interferometer, charge amplifier, wave tracer, computing machine.Described this cover supplementary instrument is done test record, is finished by computing machine and calculate or handle by wave tracer by the photosignal of laser interferometer, the calibration of charge amplifier collecting test.
Calibrating installation according to above-described pressure sensor acceleration effect, technical characterstic also has: apply the different pressure of series and adopt the corresponding different series excitation acceleration pulse of Hopkinson bar generation to encourage this pressure transducer by the pressure transducer that is calibrated of enclosure-type pressure applicator to this calibrating installation, the supplementary instrument correspondence of use test or metering records this pressure transducer different series excitation acceleration effect, the sensitivity that just draws this pressure sensor acceleration that is calibrated from the acceleration calibration result or the effect of this different series.The sensitivity of the described pressure sensor acceleration that this is calibrated should never isonomic acceleration calibration result or the effect statistics in draw.
The calibration steps of pressure sensor acceleration effect of the present invention and the advantage of calibrating installation have: 1. the calibration steps of this pressure sensor acceleration effect and calibrating installation have been started under dynamic condition and high-amplitude duty pressure and high acceleration pressure transducer have been calibrated; 2. this under dynamic condition to the acceleration effect of the pressure transducer technical barrier in this field that carried out Calibration Method and device solves, this problem is one before this and needs to be resolved hurrily and open question; 3. the calibration steps of this pressure sensor acceleration effect and calibrating installation can be calibrated under high-amplitude duty pressure and high acceleration situation simultaneously, do not damage sensor again, are the invention characteristics of this calibration steps and calibrating installation.The calibrating installation of calibration steps of the present invention and design is worth adopting and promoting.
Four. description of drawings
Figure of description of the present invention has 2 width of cloth:
Fig. 1 is the structural representation of enclosure-type pressure applicator;
Fig. 2 is the calibrating installation structural representation of pressure sensor acceleration effect.
Adopted unified label in two figure, promptly same object is used same label in two figure.In two figure: 1. sealing bolt; 2. sealed steel ball; 3. sensor holder is a pressure applicator steel body; 4. the pressure transducer that is calibrated; 5. body; 6. waveform adjusting pad; 7. Hopkinson bar; 8. grating; 9. laser interferometer; 10. charge amplifier; 11. wave tracer; 12. computing machine; 13. control air valve (connection plenum chamber); 14. power valve.
Five. specific embodiments
The calibration steps of pressure sensor acceleration effect of the present invention and calibrating installation non-limiting examples are as follows, and wherein: embodiment one～embodiment four is the embodiment about calibration steps, and embodiment five～embodiment eight is the embodiment about calibrating installation.
Embodiment one. the calibration steps of pressure sensor acceleration effect
The calibration steps of the pressure sensor acceleration effect that this is routine, it is the calibration steps of pressure sensor acceleration sensitivity, this routine calibration steps is: on the pressure-based that the pressure transducer that is calibrated is applied the calibration needs, adopt Hopkinson bar to produce the excitation acceleration pulse again and encourage this pressure transducer, by test or gauging instrument, record the excitation acceleration of this pressure transducer, by applying the different pressure of series and adopting Hopkinson bar to produce corresponding different series excitation acceleration pulse and encourage this pressure transducer, correspondence records this pressure transducer different series excitation acceleration effect, the sensitivity that never isonomic acceleration calibration effect just draws acceleration under this pressure transducer pressured state that is calibrated.The described different pressure of series that applies promptly is to apply the inferior different pressure of a series of levels, as the pressure of the differential pressure of a series of differences, a series of different successives.Described Hopkinson bar produce corresponding different series excitation acceleration pulse promptly be in time different pressure of a series of levels of applying of correspondence during each pressure Hopkinson bar produce the differences excitation acceleration pulses of corresponding a series of levels time, under the inferior different excitation acceleration pulse effect of a series of levels, the excitation acceleration pulse that will make Hopkinson bar produce corresponding different series is made test usefulness.This routine calibration steps also has: the equipment such as calibrating installation of the enclosure-type pressure applicator of employing Fig. 1 and the pressure sensor acceleration effect of Fig. 2 are realized the calibration steps of the pressure sensor acceleration effect that this is routine.One, adopt the enclosure-type pressure applicator that the pressure transducer that is calibrated is applied the pressure that calibration needs, Fig. 1 illustrates the structural representation of this enclosure-type pressure applicator, the pressure transducer 4 that is calibrated is installed on the pressure transducer seat 3 of sealing formula pressure applicator, in sensor holder 3, fill the pressure that calibration needs with air pump, as inflate 50MPa, 80MPa, 100MPa, 120MPa etc., this is a static pressure, by pressure applicator steel body 3, sealed steel ball 2, sealing bolt 1 is with its sealing, the diameter of the sealing formula pressure applicator other end is 25mm, sensor holder 3 (pressure applicator steel body) can be bonded on the Hopkinson bar with butter.Under this pressure condition that the pressure transducer that is calibrated is applied the calibration needs, adopt Hopkinson bar to produce series level time excitation acceleration pulse again and encourage this pressure transducer, by test or gauging instrument, record the series excitation acceleration of this pressure transducer correspondence, correspondence records this pressure sensor acceleration effect under certain pressure.Its two, adopt the calibrating installation of pressure sensor acceleration effect shown in Figure 2 to proceed calibration.In Fig. 2, have: the pressure transducer 4 that sensor holder is pressure applicator steel body 3, be calibrated, body 5, waveform adjusting pad 6, Hopkinson bar 7, grating 8, laser interferometer 9, charge amplifier 10, wave tracer 11, computing machine 12, control air valve (connection plenum chamber) 13, power valve 14.By connecting the control air valve 13 of plenum chamber, use series level time different pressure gass (, for example adopt 0.06Mpa, 0.08Mpa, 0.12MPa pressure gas) in power valve 14, promote the waveform shapers 6 of body 5 vertical bump Hopkinson bar 7 front ends, make and produce the inferior pressure driving pulse of answering of series level in the Hopkinson bar 7, these series levels time are answered the excitation of pressure driving pulse to be connected or are installed in the pressure transducer 4 that is calibrated on the enclosure-type pressure applicator of exerting pressure of these Hopkinson bar 7 terminal surfaces, pressure transducer 4 by time driving pulse excitation of series level obtains corresponding serial accelerated motion, after tested or the metering laser interferometer 9 by being arranged on grating 8 and the charge amplifier 10 on the enclosure-type pressure applicator, through the corresponding series acceleration of pressure transducer 4 acquisitions that wave tracer 11 is tested or metering is calibrated, calculate the acceleration effect of the pressure transducer that is calibrated 4 under certain pressure by computing machine 12 again.The structure of the Hopkinson bar 7 that this example adopts is as selecting length 1600mm, diameter 25mm.Experiment is learnt: the pulsewidth and the amplitude that produce acceleration among Fig. 2 in the shape of body 5 and the experiment are influential, and the tapering of body 5 heads is big more under for example same air pressure, and pulsewidth is wide more, and acceleration amplitude is more little.Also learn: if with the waveform adjusting pad 6-aluminium pad of identical material, the soft more acceleration amplitude of aluminium pad is low more under same air pressure, and pulsewidth is wide more.Laser interferometer 9 is by being arranged on grating 8 and the charge amplifier 10 on the enclosure-type pressure applicator, test or measure the acceleration of pressure transducer 4 acquisitions that are calibrated again through wave tracer 11, the method that is calculated the acceleration effect of the pressure transducer that is calibrated by computing machine 12 is: according to Doppler effect, the pressure transducer 4 movement velocity v (t) that are calibrated are directly proportional with Doppler's instantaneous frequency Δ f (t) of driving pulse:
(1) λ is an optical maser wavelength in the formula, and θ is an angle of diffraction; Carrying out conversion gets speed v (t) and Doppler's instantaneous frequency Δ f (t) mathematical relation and is:
(2) d is a grating constant in the formula, and m, n are diffraction progression, obtains instantaneous frequency Δ f (t), can obtain real-time speed v (t), can get acceleration a (t) to speed one subdifferential; Perhaps, by the relational expression of pattern displacement d (t) with speed v (t):
Obtain the displacement d (t) in (3) formula, carry out once, second differential get final product speed and acceleration; And the pressure of the pressure transducer 4 that is calibrated is known, so just obtains or draw the acceleration of the pressure transducer excited target under pressured state that is calibrated.Described (1), (2), (3) formula provide different formulas, method or the approach of the acceleration of calculation pressure sensor under the different parameters situation, all can adopt it.Also will point out: (the common range of choice of pressure that needs is 50～450Mpa by the enclosure-type pressure applicator pressure transducer 4 that is calibrated to be applied the different pressure of series,) and adopt Hopkinson bar 7 to produce corresponding different series excitation acceleration pulse (for example selecting 5000～20000g left and right sides acceleration) this pressure transducer 4 of excitation, correspondence records this pressure transducer 4 different series excitation acceleration effect, the sensitivity that just draws these pressure transducer that is calibrated 4 acceleration from the acceleration calibration result or the effect of this different series.The sensitivity of the described pressure sensor acceleration that this is calibrated should never isonomic acceleration calibration result or the effect statistics in draw.
Embodiment two. the calibration steps of pressure sensor acceleration effect
The calibration steps of the pressure sensor acceleration effect that this is routine can adopt auxiliary realization of equipment such as calibrating installation of the pressure sensor acceleration effect of the enclosure-type pressure applicator of Fig. 1 and Fig. 2, the calibration steps difference of the pressure sensor acceleration effect of the calibration steps of the pressure sensor acceleration effect that this is routine and embodiment one has: should fill the pressure that calibration needs in the enclosure-type pressure applicator of example, as inflation 150MPa, 180MPa, 200MPa, 230MPa etc. 1.; 2. for example adopt the pressure gas (can produce the acceleration about 5000g) of 0.06MPa, in power valve 14, promote the waveform shaper 6 of body 5 vertical bump Hopkinson bar 7 front ends; 3. waveform adjusting pad 6 employing materials are copper packing; 4. calculate the acceleration of the pressure transducer that this example is calibrated according to the computing formula among the embodiment one (1).All the other do not state the calibration steps of the pressure sensor acceleration effect that this is routine, are same as entirely described in the embodiment one, no longer repeat.
Embodiment three. the calibration steps of pressure sensor acceleration effect
The calibration steps of the pressure sensor acceleration effect that this is routine can adopt auxiliary realization of equipment such as calibrating installation of the pressure sensor acceleration effect of the enclosure-type pressure applicator of Fig. 1 and Fig. 2, the calibration steps difference of the pressure sensor acceleration effect of the calibration steps of the pressure sensor acceleration effect that this is routine and embodiment one, embodiment two has: should fill the pressure that calibration needs in the enclosure-type pressure applicator of example, as inflation 250MPa, 270MPa, 300MPa, 320MPa etc. 1.; 2. for example adopt the pressure gas (can produce the acceleration about 10000g) of 0.08MPa, in power valve 14, promote the waveform shaper 6 of body 5 vertical bump Hopkinson bar 7 front ends; 3. waveform adjusting pad 6 is adopted as the teflon pad; 4. calculate the acceleration of the pressure transducer that this example is calibrated according to the computing formula among the embodiment one (2).All the other do not state the calibration steps of the pressure sensor acceleration effect that this is routine, are same as entirely described in embodiment one, the embodiment two, no longer repeat.
Embodiment four. the calibration steps of pressure sensor acceleration effect
The calibration steps of the pressure sensor acceleration effect that this is routine can adopt auxiliary realization of equipment such as calibrating installation of the pressure sensor acceleration effect of the enclosure-type pressure applicator of Fig. 1 and Fig. 2, the calibration steps difference of the pressure sensor acceleration effect of the calibration steps of the pressure sensor acceleration effect that this is routine and embodiment one～embodiment three has: should fill the pressure that calibration needs in the enclosure-type pressure applicator of example, as inflation 350MPa, 380MPa, 400MPa, 430MPa, 450MPa etc. 1.; 2. as adopting the pressure gas (can produce the acceleration about 20000g) of 0.12MPa, in power valve 14, promote the waveform shapers 6 of body 5 vertical bump Hopkinson bar 7 front ends; 3. waveform adjusting pad 6 employing materials are aluminium pad or copper packing or teflon pad; 4. calculate the acceleration of the pressure transducer that this example is calibrated according to the computing formula among the embodiment one (3).All the other do not state the calibration steps of the pressure sensor acceleration effect that this is routine, are same as entirely described in embodiment one～embodiment three, no longer repeat.
Embodiment five. the calibrating installation of pressure sensor acceleration effect
The calibrating installation of the pressure sensor acceleration effect that this is routine is united by Fig. 1～Fig. 2 and is illustrated, and Fig. 1 illustrates the structural representation of enclosure-type pressure applicator, and Fig. 2 illustrates the calibrating installation structural representation of pressure sensor acceleration effect.The calibrating installation of the pressure sensor acceleration effect that this is routine, be the calibrating installation of pressure sensor acceleration sensitivity, the pressure transducer of installing on enclosure-type pressure applicator that the waveform shaper (also being waveform adjusting pad 6) that the calibrating installation of the pressure sensor acceleration effect that this is routine is installed by Hopkinson bar 7 and Hopkinson bar 7 front end faces, Hopkinson bar terminal surface are installed and the sealing formula pressure applicator that is calibrated 4, grating 8 etc. are formed.This cover calibrating installation simplicity of design, structure practicality.The structure of the enclosure-type pressure applicator of this example calibrating installation is provided by Fig. 1: sealing formula pressure applicator front end face can form plane contact with Hopkinson bar 7 terminal surfaces and install, diameter as sealing formula pressure applicator one end is 25mm, sensor holder 3 (pressure applicator steel body) can be bonded on the Hopkinson bar 7 with butter, its rear end is mount pad 3 and the pressure transducer 4 that is calibrated is installed, the enclosure-type pressure applicator (is for example used air pump by pneumatic supply, adopt 50MPa, 80MPa, 100MPa, the pressure gas of 120MPa etc., pressure can increase progressively) in sealing formula pressure applicator, fill the pressure that calibration needs, and by pressure applicator steel body 3 (also being sensor holder) and sealing bolt 1, sealed steel ball 2 is its sealing, test is installed with grating 8 at the side plane of sealing formula pressure applicator.This routine Hopkinson bar 7 as selection length 1600mm, diameter 25mm, its structure is: these routine Hopkinson bar 7 front end faces are equipped with band waveform adjusting pad 6 (being waveform shaper), this waveform adjusting pad 6 is individual by collision body, the structure of this waveform adjusting pad can be selected aluminium pad material, the body 5 that it is received under the pressure gas promotion vertically clashes into, this bump makes in the Hopkinson bar 7 and to produce one and answer the pressure driving pulse, Hopkinson bar 7 terminal surfaces fix or be equipped with the enclosure-type pressure applicator and on the pressure transducer that is calibrated 4, as body 5 is (for example to adopt 0.06Mpa by pressure gas in power valve 14,0.08Mpa, 0.12MPa pressure gas) promote the projectile of emission down, by connecting the control air valve 13 of plenum chamber, use series level time different pressure gass in power valve 14, to promote the waveform shaper 6 of body 5 vertical bump Hopkinson bar 7 front ends.The supplementary instrument that the calibrating installation of the pressure sensor acceleration effect that this is routine need be tested or measure has: laser interferometer 9, charge amplifier 10, wave tracer 11, computing machine 12, they all are shown among Fig. 2.Described this cover supplementary instrument is by the photosignal of laser interferometer 9, the calibration of charge amplifier 10 collecting tests, done test record, finished by computing machine 12 and calculate or handle by wave tracer 11, concrete computing method and formula see also the related content among the embodiment one.(the common range of choice of pressure that needs is 50～450Mpa) and adopts and produce corresponding different series excitation acceleration pulse (for example selecting the acceleration about 5000～20000g) on the Hopkinson bar 7 and encourage this pressure transducer 4 by the enclosure-type pressure applicator pressure transducer that is calibrated 4 of this calibrating installation to be applied the different pressure of series, the supplementary instrument correspondence of use test or metering records this pressure transducer different series excitation acceleration effect, the sensitivity that just draws this pressure sensor acceleration that is calibrated from the acceleration calibration result or the effect of this different series.The sensitivity of the described pressure sensor acceleration that this is calibrated should never isonomic acceleration calibration result or the effect statistics in draw.
Embodiment six. the calibrating installation of pressure sensor acceleration effect
The calibrating installation of the pressure sensor acceleration effect that this is routine is united by the calibrating installation of the pressure sensor acceleration effect of the enclosure-type pressure applicator of Fig. 1 and Fig. 2 and is illustrated, the calibrating installation difference of the pressure sensor acceleration effect of the calibrating installation of the pressure sensor acceleration effect that this is routine and embodiment five has: should fill the pressure that calibration needs in the enclosure-type pressure applicator of example, as inflation 150MPa, 180MPa, 200MPa, 230MPa etc. 1.; 2. for example adopt the pressure gas (can produce the acceleration about 5000g) of 0.06MPa, in power valve 14, promote the waveform shaper 6 of body 5 vertical bump Hopkinson bar 7 front ends; 3. waveform adjusting pad 6 employing materials are copper packing; 4. can calculate the acceleration of the pressure transducer that this example is calibrated according to the computing formula among the embodiment one (1).All the other do not state the calibrating installation of the pressure sensor acceleration effect that this is routine, are same as entirely described in the embodiment five, no longer repeat.
Embodiment seven. the calibrating installation of pressure sensor acceleration effect
The calibrating installation of the pressure sensor acceleration effect that this is routine is united by the calibrating installation of the pressure sensor acceleration effect of the enclosure-type pressure applicator of Fig. 1 and Fig. 2 and is illustrated, the calibrating installation difference of the pressure sensor acceleration effect of the calibrating installation of the pressure sensor acceleration effect that this is routine and embodiment five, embodiment six has: should fill the pressure that calibration needs in the enclosure-type pressure applicator of example, as inflation 250MPa, 270MPa, 300MPa, 320MPa etc. 1.; 2. for example adopt the pressure gas (can produce the acceleration about 10000g) of 0.08MPa, in power valve 14, promote the waveform shaper 6 of body 5 vertical bump Hopkinson bar 7 front ends; 3. waveform adjusting pad 6 is adopted as the teflon pad; 4. can calculate the acceleration of the pressure transducer that this example is calibrated according to the computing formula among the embodiment one (2).All the other do not state the calibrating installation of the pressure sensor acceleration effect that this is routine, are same as entirely described in embodiment five, the embodiment six, no longer repeat
Embodiment eight. the calibrating installation of pressure sensor acceleration effect
The calibrating installation of the pressure sensor acceleration effect that this is routine is united by the calibrating installation of the pressure sensor acceleration effect of the enclosure-type pressure applicator of Fig. 1 and Fig. 2 and is illustrated, the calibration device difference of the pressure sensor acceleration effect among the calibrating installation of the pressure sensor acceleration effect that this is routine and the embodiment five～embodiment seven has: should fill the pressure that calibration needs in the enclosure-type pressure applicator of example, as inflation 350MPa, 380MPa, 400MPa, 430MPa, 450MPa etc. 1.; 2. as adopting the pressure gas (can produce the acceleration about 20000g) of 0.12MPa, in power valve 14, promote the waveform shapers 6 of body 5 vertical bump Hopkinson bar 7 front ends; 3. waveform adjusting pad 6 employing materials are aluminium pad or copper packing or teflon pad; 4. can calculate the acceleration of the pressure transducer that this example is calibrated according to the computing formula among the embodiment one (3).All the other do not state the calibrating installation of the pressure sensor acceleration effect that this is routine, are same as entirely described in embodiment five～embodiment seven, no longer repeat.
Claims (10)
1. the calibration steps of a pressure sensor acceleration effect, it is the calibration steps of pressure sensor acceleration sensitivity, be characterised in that: the calibration steps of described this pressure sensor acceleration effect is: on the pressure-based that the pressure transducer that is calibrated is applied the calibration needs, adopt Hopkinson bar to produce the excitation acceleration pulse again and encourage this pressure transducer, by test or gauging instrument, record the excitation acceleration of this pressure transducer, by applying the different pressure of series and adopting Hopkinson bar to produce corresponding different series excitation acceleration pulse and encourage this pressure transducer, correspondence records this pressure transducer different series excitation acceleration effect, calibrates the sensitivity that effect just draws acceleration under this pressure transducer pressured state that is calibrated from the acceleration of this different series.
2. the calibration steps of pressure sensor acceleration effect according to claim 1, be characterised in that: the calibration steps of described this pressure sensor acceleration effect also has: adopt the enclosure-type pressure applicator that the pressure transducer that is calibrated is applied the pressure that calibration needs, the pressure transducer that is calibrated is installed on the pressure transducer seat of sealing formula pressure applicator, in the enclosure-type pressure applicator, fill the pressure that calibration needs with source of the gas, by pressure applicator steel body, sealing bolt seals it, under certain pressure condition that the pressure transducer that is calibrated is applied the calibration needs, adopt Hopkinson bar to produce series level time excitation acceleration pulse again and encourage this pressure transducer, by test or gauging instrument, record the series excitation acceleration of this pressure transducer correspondence, correspondence records this pressure sensor acceleration effect under certain pressure.
3. the calibration steps of pressure sensor acceleration effect according to claim 1, be characterised in that: the calibration steps of described this pressure sensor acceleration effect also has: adopt series level time pressure gas to promote the waveform shaper that body vertically clashes into the Hopkinson bar front end, make and produce the inferior pressure driving pulse of answering of series level in the Hopkinson bar, these series levels time are answered the excitation of pressure driving pulse to be connected or are installed in the pressure transducer that is calibrated on the enclosure-type pressure applicator of exerting pressure of this Hopkinson bar terminal surface, pressure transducer by time driving pulse excitation of series level obtains corresponding serial accelerated motion, after tested or the laser interferometer of metering by being arranged on the grating on the enclosure-type pressure applicator or/and the pressure transducer that charge amplifier test or metering are calibrated obtains corresponding serial acceleration, calculate the acceleration effect of the pressure transducer that is calibrated under certain pressure.
4. the calibration steps of pressure sensor acceleration effect according to claim 1, be characterised in that: the laser interferometer of after tested described or metering is by being arranged on grating on the enclosure-type pressure applicator or/and the acceleration that the pressure transducer that charge amplifier test or metering are calibrated obtains, the method that calculates the acceleration effect of the pressure transducer that is calibrated is: according to Doppler effect, the pressure transducer movement velocity v (t) that is calibrated is directly proportional with Doppler's instantaneous frequency Δ f (t) of driving pulse:
(1) λ is an optical maser wavelength in the formula, and θ is an angle of diffraction; Carrying out conversion gets speed v (t) and Doppler's instantaneous frequency Δ f (t) mathematical relation and is:
(2) d is a grating constant in the formula, and m, n are diffraction progression, obtains instantaneous frequency Δ f (t), can obtain real-time speed v (t), can get acceleration a (t) to speed one subdifferential; Perhaps, by the relational expression of pattern displacement d (t) with speed v (t):
Obtain the displacement d (t) in (3) formula, carry out once, second differential get final product speed and acceleration; And the pressure of the pressure transducer that is calibrated is known, so just obtains or draw the acceleration of the pressure transducer excited target under pressured state that is calibrated.
5. according to the calibration steps of claim 2 or 3 or 4 described pressure sensor acceleration effects, be characterised in that: the different series excitation acceleration pulse that the pressure transducer that is calibrated is applied the different pressure of series and adopt Hopkinson bar to produce correspondence by the enclosure-type pressure applicator encourages this pressure transducer, correspondence records this pressure transducer different series excitation acceleration effect, the sensitivity that just draws this pressure sensor acceleration that is calibrated from the acceleration calibration result or the effect of this different series.
6. the calibrating installation of a pressure sensor acceleration effect, be the calibrating installation of pressure sensor acceleration sensitivity, be characterised in that: the pressure transducer that is calibrated, the grating installed on enclosure-type pressure applicator that the waveform shaper that the calibrating installation of described this pressure sensor acceleration effect is installed by Hopkinson bar and Hopkinson bar front end face, Hopkinson bar terminal surface are installed and the sealing formula pressure applicator are formed.
7. the calibrating installation of pressure sensor acceleration effect according to claim 6, be characterised in that: the structure of the enclosure-type pressure applicator of described this calibrating installation is: sealing formula pressure applicator front end face can form that plane contact is installed, its rear end is mount pad with the Hopkinson bar terminal surface and the pressure transducer that is calibrated is installed, is filled pressure that calibration needs and by pressure applicator steel body and sealing bolt it is sealed in sealing formula pressure applicator by source of the gas, is equipped with to test at the side plane of sealing formula pressure applicator and uses grating.
8. the calibrating installation of pressure sensor acceleration effect according to claim 6, be characterised in that: the structure of the Hopkinson bar of described this calibrating installation is: this Hopkinson bar front end face is equipped with the waveform shaper of band waveform adjusting pad, this waveform adjusting pad be received in pressure gas promote body down vertically clash into and make generation one in the Hopkinson bar answer the pressure driving pulse by collision body, the Hopkinson bar terminal surface fix or be equipped with the enclosure-type pressure applicator and on the pressure transducer that is calibrated, wherein body is the projectile that pressure gas promotes or launches, and the palpus sealing is filled with the pressure transducer that is calibrated and calibrates the pressure that needs in the enclosure-type pressure applicator.
9. the calibrating installation of pressure sensor acceleration effect according to claim 6, be characterised in that: the supplementary instrument that the calibrating installation of described this pressure sensor acceleration effect need be tested or measure has: laser interferometer, charge amplifier, wave tracer, computing machine.
10. according to the calibrating installation of claim 7 or 8 or 9 described pressure sensor acceleration effects, be characterised in that: apply the different pressure of series and adopt the corresponding different series excitation acceleration pulse of Hopkinson bar generation to encourage this pressure transducer by the pressure transducer that is calibrated of enclosure-type pressure applicator to this calibrating installation, the supplementary instrument correspondence of use test or metering records this pressure transducer different series excitation acceleration effect, the sensitivity that just draws this pressure sensor acceleration that is calibrated from the acceleration calibration result or the effect of this different series.
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