CN106443071B - The extracting method of the identifiable high-range acceleration transducer resonant frequency of noise - Google Patents
The extracting method of the identifiable high-range acceleration transducer resonant frequency of noise Download PDFInfo
- Publication number
- CN106443071B CN106443071B CN201610833591.XA CN201610833591A CN106443071B CN 106443071 B CN106443071 B CN 106443071B CN 201610833591 A CN201610833591 A CN 201610833591A CN 106443071 B CN106443071 B CN 106443071B
- Authority
- CN
- China
- Prior art keywords
- frequency
- acceleration
- acceleration transducer
- spectrum
- noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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 provides a kind of extracting method of identifiable high-range acceleration transducer resonant frequency of noise, comprising the following steps: obtains the electrical noise frequency spectrum of acceleration sensor system to be measured；Obtain the frequency of impact spectrum of the acceleration sensor system to be detected；The resonant frequency of the acceleration transducer is determined according to frequency of impact spectrum and the electrical noise frequency spectrum.The present invention uses two step methods of testing, respectively obtains electrical noise frequency spectrum and frequency of impact spectrum, by the identification to electrical noise frequency spectrum, can relatively accurately determine the resonant frequency of acceleration transducer；The present invention obtains higher acceleration during the test, using the method that metallic rod freely falling body and ground metal anvil mutually collide, and has the characteristics that simple to operate；The present invention can determine the resonant frequency of acceleration transducer, and can determine the electrical noise of acceleration sensor system.
Description
Technical field
The invention belongs to the mechanical test analysis fields of microsensor, more particularly to a kind of identifiable high range of noise
The extracting method of acceleration transducer resonant frequency.
Background technique
High-range acceleration transducer, for example range is in 100,000 g (1g=9.8m/s2) or acceleration higher than 100,000 g
Sensor, there are two important parameter it needs to be determined that.One is sensitivity, the other is the test of first-order modal resonant frequency.One
As for, the sensitivity of acceleration transducer and the product of first order resonance frequency square are a constants.That is if sensitive
Degree is big, then resonant frequency is with regard to small；Sensitivity is small, and resonant frequency is just very high.The sensitivity very little of high-range acceleration transducer,
Usually in microvolt magnitude, such resonant frequency will be very high, therefore, just difficult to the test of resonant frequency, wants to test macro
Ask just very high.In addition to sensitivity it needs to be determined that other than, the first order resonance frequency of acceleration transducer is an important parameter, it determine
The band of operation of acceleration transducer, therefore, it is necessary to be determined to first order resonance frequency.For being based on silicon resistance pressure type
Acceleration transducer, the acceleration transducer of single-ended clamped cantilever beam type, first order resonance frequency is in tens KHz to several hundred KHz.
And acceleration transducer its resonant frequency clamped for both-end be up to several hundred KHz, or even arrives MHz magnitude.Simultaneously as it is clever
Sensitivity is low, its peak-to-peak signal that resonates is with regard to very little in this way.When under HI high impact is tested, resonance peak-to-peak signal will make an uproar with typical background
Together, especially the electrical noise signals of high frequency and its harmonic signal have very strong resonance signal peak to acoustical signal aliasing, these letters
It number is appeared in frequency spectrum together with the mechanical resonance signal of acceleration transducer, it is difficult to distinguish and identification, be difficult to determine in this way
Its single order mechanical resonance frequency.In brief, in shock-testing, since system brings the interference of electrical noise signals, high range
The single order high-frequency resonance signal of acceleration transducer is difficult to and extracts, it is therefore desirable to exclude, reduces or identify and is typical
Noise spectrum just can determine that the natural reonant frequency of acceleration transducer.
High-range acceleration transducer uses ballistic method generally to extract the parameters such as sensitivity and resonant frequency.Impact process
In can generate the acceleration input signal of thousands of g or even tens of thousands of g, while signal amplification is carried out using amplifier, then to acquisition
The signal arrived carries out waveform analysis and calculating, to obtain canonical parameter.In freely falling bar shock measuring system, fixed acceleration
The metallic rod of sensor is freely fallen from certain altitude to collide with the metal anvil placed on ground, in the time of tens microseconds
It is interior to generate thousands of acceleration to tens of thousands of g.Freely falling bar shock measuring system includes four parts: freely falling bar impact and occurs
Device, sensor front end, sensor amplifier circuit, data acquisition, storage and the display system of computer control.Sensor background
Noise signal mostlys come from the intrinsic electrical noise signals of computer local system, such as the presence of phase noise, and amplification electricity
Intrinsic noise, external interference noise and the noise of acceleration transducer on road etc., these signals have at a certain intrinsic frequency
Apparent electrical resonance signals peak and its harmonic signal noise, greatly hamper to acceleration transducer natural reonant frequency peak position
Identification and confirmation.In impact process, the intrinsic mechanical resonance signal of acceleration transducer single order can be with these signal aliasings one
It rises, needs to separate it with noise signal.It makes an uproar although noise can be reduced by modes such as mechanical or electrofiltration waves or eliminated
Sound, but the intrinsic signal size for even weakening acceleration transducer can be equally greatly reduced in this way, therefore is unfavorable.
In other patents, for example, a kind of " test method-of resonance frequency of high range piezoresistance acceleration sensor
CN101354284 ", " half-bridge test method-CN101539588 of the mode resonance frequency of piezoresistive acceleration sensor ", not
It is related to noise to the interference problem of signal.Patent CN101354284, which is described, utilizes the arteries and veins for freely falling the generation of bar metal bump
Rush test method of the signal as resonance frequency of high range piezoresistance acceleration sensor excitaton source, mainly using metal end face it
Between collision generate higher acceleration and radio-frequency component is distributed wave abundant as driving source, when the wave of frequencies certain in driving source
When being equal or close to the frequency of the natural mode of vibration of high range piezoresistance acceleration sensor, device high range piezoresistance acceleration is passed
Sensor resonates, and the resonant frequency of high range piezoresistance acceleration sensor is obtained in the way of resonant excitation.Patent
The method using half-bridge output form test resonant frequency is described in CN101539588, is predominantly keeping piezoresistive acceleration
On the basis of the original full-bridge circuit connection structure of sensor, frequency spectrum abundant is generated as driving source using metal bump impact,
By external circuits appropriate, the form exported using half-bridge, to obtain the resonant frequency information of acceleration transducer mode, benefit
Spectrum analysis is carried out with the initial data of acquisition, obtains the mode resonance frequency of micro-structure.Due to test scope, device architecture and
The problems such as sensitivity, is not related to noise jamming problem in the two patents.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of identifiable high ranges of noise
The extracting method of acceleration transducer resonant frequency, for solving the test side of acceleration transducer resonant frequency in the prior art
The interference of electrical noise signals, the single order high-frequency resonance signal of high-range acceleration transducer are brought in method due to cannot exclude system
The problem of being difficult to and extracting.
In order to achieve the above objects and other related objects, the present invention provides a kind of identifiable high-range acceleration biography of noise
The extracting method of sensor resonant frequency, the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise is extremely
Less the following steps are included:
Obtain the electrical noise frequency spectrum of acceleration sensor system to be measured；
Obtain the frequency of impact spectrum of the acceleration sensor system to be detected；
The resonant frequency of the acceleration transducer is determined according to frequency of impact spectrum and the electrical noise frequency spectrum.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Select scheme, obtain the electrical noise frequency spectrum of the acceleration sensor system to be measured the following steps are included:
The acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio；
Directly record the First Series output waveform that electrical noise changes over time；
First Series output waveform progress Fourier transformation is obtained into corresponding frequency spectrum；
It is described to acceleration pick-up sensor to get arriving to determine the position at frequency spectrum medium-high frequency electrical noise resonance signal peak
The electrical noise frequency spectrum of system.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Scheme is selected, it, will be described to be checked after the acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio
The input terminal shortcircuit of acceleration pick-up sensor directly records the institute that electrical noise changes over time in the way of multi-channel data acquisition
State First Series output waveform.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Scheme is selected, the First Series output waveform that electrical noise changes over time includes electrical noise voltage magnitude versus time curve,
Electrical noise voltage magnitude versus time curve progress Fourier transformation is obtained into corresponding frequency spectrum.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Select scheme, obtain the frequency of impact spectrum of the acceleration sensor system to be detected the following steps are included:
The acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio；
The metallic rod for being equipped with the acceleration pick-up sensor to be checked is freely fallen and ground from certain height
The metal anvil of upper placement collides, to generate the impact acceleration of amplitude；
The acceleration transducer is directly recorded in the way of multi-channel data acquisition during impact at any time
The second series output waveform of variation；
Second series output waveform progress Fourier transformation is obtained into corresponding frequency spectrum；
Determine the acceleration transducer natural resonance frequency in the frequency spectrum including high frequency electrical noise resonance signal peak
It is composed to get to the frequency of impact to acceleration pick-up sensor the position at rate peak.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Scheme is selected, the second series output waveform that the acceleration transducer changes over time during impact includes voltage amplitude
It is worth versus time curve, voltage magnitude versus time curve progress Fourier transformation is obtained into corresponding frequency
Spectrum.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Scheme is selected, the acceleration pick-up sensor to be checked is mounted in the metallic rod along sensitive direction.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Scheme is selected, the acceleration pick-up sensor to be checked is mounted in the metallic rod along axis direction is intersected.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Scheme is selected, the tool of the resonant frequency of the acceleration transducer is determined according to frequency of impact spectrum and the electrical noise frequency spectrum
Body method are as follows: according to the electrical noise frequency spectrum, remove identical with the electrical noise frequency spectrum in the frequency of impact spectrum
Electric signal formant is to get the resonant frequency for arriving the acceleration transducer.
One kind of extracting method as the identifiable high-range acceleration transducer resonant frequency of noise of the invention is excellent
Scheme is selected, the resonant frequency of the acceleration transducer is first order resonance frequency or high order resonance frequency.
As described above, the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the invention, tool
Have following the utility model has the advantages that the present invention respectively obtains electrical noise frequency spectrum and frequency of impact spectrum, by electricity using two step methods of testing
The identification of noise frequency spectrum, can relatively accurately determine the resonant frequency of acceleration transducer；Process of the present invention in test
In, higher acceleration is obtained using the method that metallic rod freely falling body and ground metal anvil mutually collide, is had easy to operate
Convenient feature；The present invention can determine the resonant frequency of acceleration transducer, and can determine acceleration sensor system
Electrical noise.
Detailed description of the invention
Fig. 1 is shown as the process of the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
Figure.
Fig. 2 is shown as being made in the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
Freely fall bar percussion mechanism schematic diagram and data collection system.
Fig. 3 is shown as accelerating in the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
Degree sensor is mounted on the schematic diagram in the direction metallic rod side wall sensitivity y.
Fig. 4 is shown as accelerating in the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
Spend the coordinate schematic diagram of sensor installation.
Fig. 5 is shown as accelerating in the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
Spend the First Series output waveform diagram of sensor electrical noise.
Fig. 6 is shown as accelerating in the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
Spend the output waveform diagram of sensor electrical noise frequency spectrum.
Fig. 7 is shown as accelerating in the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
Spend the impact output waveform diagram in sensor sensing direction.
Fig. 8 is shown as accelerating in the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise of the present invention
The frequency of impact spent under the impact output of sensor sensing direction composes schematic diagram.
Component label instructions
1 to acceleration pick-up sensor
2 metallic rods
3 metal anvils
4 cables
5 signal amplifiers
6 computer data acquisition systems
7 pin to acceleration pick-up sensor
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Fig. 1 is please referred to Fig. 8.It should be noted that diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, though only show in diagram with related component in the present invention rather than package count when according to actual implementation
Mesh, shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its
Assembly layout kenel may also be increasingly complex.
The purpose of the present invention is to provide a kind of noise identifiable high-range acceleration transducer resonant frequency extraction sides
Method.Biggish acceleration is obtained using the method that the metal anvil placed on metallic rod freely falling body and ground mutually collides.Using
Two step methods of testing obtain system electrical noise frequency spectrum and frequency of impact spectrum respectively, exclude electrical noise frequency from frequency of impact spectrum
Apparent high frequency electrical noise signal, can be obtained the first order resonance frequency of acceleration transducer in spectrum.In metallic rod freely falling body
It is to be fixed on acceleration transducer in the groove of metallic rod tail end with selected double-sided adhesive in test method.Centainly accelerating
It spends in range ability, used double-sided adhesive does not influence the strain wave transmittance process of generation.Metallic rod freely falling body and ground
The metal anvil collision placed on face generates strain wave, and strain wave will pass to the fixed sensing of metallic rod tail end along metallic rod
Device, sensor record this collision process.Collision process can generate many high frequency waves abundant, will include acceleration in these waves
The first order resonance frequency wave of sensor will inspire the single order natural resonance of acceleration transducer when meeting certain condition, from
And the formant that can be gone out by obtaining the frequency in frequency spectrum analysis.
Referring to Fig. 1, the present invention provides a kind of extraction of identifiable high-range acceleration transducer resonant frequency of noise
Method, the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise the following steps are included:
S1: the electrical noise frequency spectrum of acceleration sensor system to be measured is obtained；
S2: the frequency of impact spectrum of the acceleration sensor system to be detected is obtained；
S3: the resonance frequency of the acceleration transducer is determined according to frequency of impact spectrum and the electrical noise frequency spectrum
Rate.
In step sl, the S1 step and Fig. 5 to Fig. 6 in Fig. 1 are please referred to, the electricity of acceleration sensor system to be measured is obtained
Noise frequency spectrum.
As an example, obtain the electrical noise frequency spectrum of the acceleration sensor system to be measured the following steps are included:
S11: the acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio；
S12: the First Series output waveform that electrical noise changes over time directly is recorded, as shown in Figure 5；
S13: First Series output waveform progress Fourier transformation is obtained into corresponding frequency spectrum；
S14: determine that the position at frequency spectrum medium-high frequency electrical noise resonance signal peak passes to get to described to measuring acceleration
The electrical noise frequency spectrum of sensor system, as shown in Figure 6.
As an example, mechanical filtering material is equipped between the acceleration pick-up sensor to be checked and the metallic rod, it is described
Mechanical filtering material can be but be not limited only to double-sided adhesive, and the thickness of the machinery filtering material can be but be not limited only to
0.1mm~0.2mm.
As an example, it is used in the present invention freely fall bar percussion mechanism schematic diagram and data collection system as shown in Fig. 2,
Using to the acceleration pick-up sensor to be checked freely fallen in bar percussion mechanism schematic diagram and data collection system in the step
1, metallic rod 2, cable 4, signal amplifier 5 and computer data acquisition system 6.
As an example, the amplification factor of the amplifying circuit of the acceleration pick-up sensor to be checked 1 can be but be not limited only to
20 times, -1dB cutoff frequency is greater than 25kHz.The output end of the acceleration pick-up sensor to be checked 1 and the signal amplifier 5 are logical
It crosses the cable 4 to be connected, the input terminal of the output end of the signal amplifier 5 and the computer data acquisition system 6
It is connected.
As an example, the metallic rod can be steel pole or aluminium alloy rod, it is preferable that in the present embodiment, the metallic rod
Size for aluminium alloy rod, the metallic rod can be but be not limited only to: a length of 1m, diameter 1.5cm.
In one example, the acceleration pick-up sensor to be checked 1 is mounted in the metallic rod 2 along sensitive direction, i.e. institute
The length direction for stating the pin 7 of acceleration pick-up sensor 1 to be checked is distributed along the y-axis direction, as shown in Figures 3 and 4.
In another example, the acceleration pick-up sensor to be checked 1 is mounted in the metallic rod 2 along axis direction is intersected,
The length direction of the pin 7 of the i.e. described acceleration pick-up sensor to be checked 1 is distributed along the x-axis direction as shown in Fig. 3 and Fig. 4.
As an example, the acceleration pick-up sensor 1 to be checked is mounted in the metallic rod 2 with certain draw ratio it
Afterwards, by the input terminal shortcircuit of the acceleration pick-up sensor 1 to be checked (in the pin 7 of the i.e. described acceleration pick-up sensor to be checked 1
Any two short circuit in four pins certainly in other examples can also be using other modes, as long as ensuring acquisition
The output of the acceleration pick-up sensor to be checked is the output under no percussion), utilize multi-channel data acquisition
Mode directly records the First Series output waveform that electrical noise changes over time, specifically, the measuring acceleration to be checked passes
Sensor 1 via the amplified signal of the signal amplifier 5 can by but be not limited only to Topview4012 multichannel voltage wave and adopt
Truck obtains, and is eventually displayed on computer screen.
As an example, the First Series output waveform that electrical noise changes over time include electrical noise voltage magnitude at any time
Change curve, i.e. temporal relationship can obtain electrical noise voltage magnitude versus time curve progress Fourier transformation
To corresponding frequency spectrum, as shown in fig. 6, determining apparent high frequency electrical signal formant from low to high according to frequency, record is all
Electric signal formant, wherein containing harmonic signal.It is respectively 1.44MHz and 2.88MHz in Fig. 6.
In step s 2, the S2 step and Fig. 7 to Fig. 8 in Fig. 1 are please referred to, the acceleration pick-up sensor system to be checked is obtained
The frequency of impact of system is composed.
As an example, obtain the frequency of impact spectrum of the acceleration sensor system to be detected the following steps are included:
S21: the acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio；
S22: by the metallic rod for being equipped with the acceleration pick-up sensor to be checked from certain height freely fall with
The metal anvil placed on ground collides, to generate the impact acceleration of amplitude；
S23: directly recorded in the way of multi-channel data acquisition the acceleration transducer during impact with
The second series output waveform of time change, as shown in Figure 7；
S24: second series output waveform progress Fourier transformation is obtained into corresponding frequency spectrum；
S25: determine that the acceleration transducer in the frequency spectrum including high frequency electrical noise resonance signal peak is inherently total
The position at vibration frequency peak is composed to get to the frequency of impact to acceleration pick-up sensor, as shown in Figure 8.
As an example, mechanical filtering material is equipped between the acceleration pick-up sensor to be checked and the metallic rod, it is described
Mechanical filtering material can be but be not limited only to double-sided adhesive, and the thickness of the machinery filtering material can be but be not limited only to
0.1mm~0.2mm.
As an example, it is used in the present invention freely fall bar percussion mechanism schematic diagram and data collection system as shown in Fig. 2,
It is described freely to fall bar percussion mechanism schematic diagram and data collection system includes acceleration pick-up sensor 1 to be checked, metallic rod 2, metal
Anvil 3, cable 4, signal amplifier 5 and computer data acquisition system 6, the amplification electricity of the acceleration pick-up sensor 1 to be checked
The amplification factor on road is 20 times, and -1dB cutoff frequency is greater than 25kHz.The output end of the acceleration pick-up sensor to be checked 1 and institute
It states signal amplifier 5 to be connected, the input terminal of the output end of the signal amplifier 5 and the computer data acquisition system 6
Be connected, the signal of amplification can by but be not limited only to Topview4012 multichannel voltage wave capture card and obtain, and finally show
On the computer screen.
As an example, the metallic rod can be steel pole or aluminium alloy rod, it is preferable that in the present embodiment, the metallic rod
Size for aluminium alloy rod, the metallic rod can be but be not limited only to: a length of 1m, diameter 1.5cm.
As an example, the metal anvil 3 can be but be not limited only to riveting stake, the size of the metal anvil 3 can be but
It is not limited only to: a length of 29.8cm, width 25.7cm, a height of 19.2cm.
In one example, the acceleration pick-up sensor to be checked 1 is mounted in the metallic rod 2 along sensitive direction, i.e. institute
The length direction for stating the pin 7 of acceleration pick-up sensor 1 to be checked is distributed along the y-axis direction, as shown in Figures 3 and 4.
In another example, the acceleration pick-up sensor to be checked 1 is mounted in the metallic rod 2 along axis direction is intersected,
The length direction of the pin 7 of the i.e. described acceleration pick-up sensor to be checked 1 is distributed along the x-axis direction as shown in Fig. 3 and Fig. 4.
As an example, the second series output waveform that the acceleration transducer changes over time during impact
Including voltage magnitude versus time curve, voltage magnitude versus time curve progress Fourier transformation is obtained
Corresponding frequency spectrum.
Specifically, when the metal anvil 3 on 2 free-falling of metallic rod and ground collides, the metallic rod 2
Collision end end face speed reaches after maximum and is decelerated first, and when speed is zero, rebound accelerates to the metallic rod 2 upwards again
The surface for leaving the metal anvil 3 obtains biggish acceleration using the variation of 2 speed of metallic rod described in the process.If described
The acceleration of the collision end end face of metallic rod 2 is a (t), then the velocity variable of collision end end face is
T is the time for collision start time making time zero, t in formula0It is that two collision bodies are restored to the time not interacted again.Institute
It states metallic rod 2 and collides end end face and form compression stress wave, the other end of Xiang Suoshu metallic rod 2 is propagated, by the time of t=l/C, by
The acceleration pick-up sensor to be checked 1 responds (l is the length of metallic rod, and C is the velocity of sound in bar).With the metallic rod 2 and institute
It states at the time of metal anvil 3 just contacts as timeorigin, the acceleration that the acceleration pick-up sensor 1 to be checked is subjected to can indicate
For a (t-l/C), then the voltage signal that the acceleration pick-up sensor to be checked 1 provides is exactly U (t)=Sa (t-l/C), in t
The acceleration pick-up sensor 1 to be checked is accelerated not yet when≤l/C, and U (t) is that 0, S is the acceleration sensing to be detected
The sensitivity of device.
In the acceleration pick-up sensor shock response spectrum test to be checked, need to determine the acceleration pick-up sensor to be checked first
The longitudinal wave output voltage signal U of 1 sensitive direction (such as y-axis)s(y)Change with time relationship, can be from the acceleration to be detected
It spends in second series output waveform obtained in the test of the sensitive direction of sensor 1 and reads；Then from the time domain of second series
Relationship obtains frequency of impact spectrum, as shown in figure 8, as shown in Figure 8, determining from low to high according to frequency bright using Fourier transformation
Aobvious formant records the frequency values of all formants wherein containing the formant of acceleration transducer.It is obvious in Fig. 7
Formant be 1.14MHz, 1.44MHz and 2.88MHz.
It should be noted that the step S1 can be interchanged with the step of step S2, it can first carried out Ru above-mentioned
Then step S1 executes step S2 again, can also first carry out step S2, then executes step S1 again.
It should be further noted that the step S21 in step S2 can be saved when first carrying out step S1；It holds in the ban
When row step S2, the step S11 in step S1 can be saved.
In step s3, incorporated by reference to Fig. 6 and Fig. 8 refering to fig. 1 in S3 step, according to the frequency of impact spectrum and the electricity
Noise frequency spectrum determines the resonant frequency of the acceleration transducer.
As an example, determining the resonance of the acceleration transducer according to frequency of impact spectrum and the electrical noise frequency spectrum
Frequency method particularly includes: according to the electrical noise frequency spectrum, remove in the frequency of impact spectrum with the electrical noise frequency
Identical electric signal formant is composed to get the resonant frequency of the acceleration transducer is arrived.Specifically, as shown in fig. 6, the electricity
It include the electric signal formant positioned at 1.44MHz and 2.88MHz in noise frequency spectrum, meanwhile, as shown in figure 8, impact frequency
It include the formant positioned at 1.14MHz, 1.44MHz and 2.88MHz in rate spectrum, due to including high-frequency electrical in frequency of impact spectrum
Acceleration transducer natural reonant frequency peak including noise resonance signal peak, by Fig. 6 it is recognised that being located at compared with Fig. 8
1.14MHz is the resonant frequency of the acceleration pick-up sensor to be checked 1, the resonant frequency phase of the resonant frequency and theory expectation
It coincide.
As an example, the acceleration pick-up sensor to be checked 1 is by design, sensitivity and the known acceleration of resonant frequency
Spend sensor.
As an example, the resonant frequency of the acceleration transducer can be first order resonance frequency, or high-order is total
Vibration frequency.
In conclusion the present invention provides a kind of extraction side of identifiable high-range acceleration transducer resonant frequency of noise
The extracting method of method, the identifiable high-range acceleration transducer resonant frequency of noise at least includes the following steps: obtaining
The electrical noise frequency spectrum of acceleration sensor system to be measured；Obtain the frequency of impact of the acceleration sensor system to be detected
Spectrum；The resonant frequency of the acceleration transducer is determined according to frequency of impact spectrum and the electrical noise frequency spectrum.The present invention
Using two step methods of testing, electrical noise frequency spectrum and frequency of impact spectrum are respectively obtained, it, can be with by the identification to electrical noise frequency spectrum
Relatively accurately determine the resonant frequency of acceleration transducer；The present invention during the test, using metallic rod freely falling body
Higher acceleration is obtained with the method that ground metal anvil mutually collides, is had the characteristics that simple to operate；The present invention
To determine the resonant frequency of acceleration transducer, and it can determine the electrical noise of acceleration sensor system.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (9)
1. a kind of extracting method of the identifiable high-range acceleration transducer resonant frequency of noise, which is characterized in that at least wrap
Include following steps:
Obtain the electrical noise frequency spectrum of acceleration sensor system to be measured, comprising the following steps:
The acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio；
Directly record the First Series output waveform that electrical noise changes over time；
First Series output waveform progress Fourier transformation is obtained into corresponding frequency spectrum；
The position at frequency spectrum medium-high frequency electrical noise resonance signal peak is determined to get the acceleration sensor system to be measured is arrived
Electrical noise frequency spectrum；
Obtain the frequency of impact spectrum of the acceleration sensor system to be detected；
The resonant frequency of the acceleration transducer is determined according to frequency of impact spectrum and the electrical noise frequency spectrum.
2. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 1,
Be characterized in that: after the acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio, will it is described to
The input terminal shortcircuit for detecting acceleration transducer directly records what electrical noise changed over time in the way of multi-channel data acquisition
The First Series output waveform.
3. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 1,
Be characterized in that: the First Series output waveform that electrical noise changes over time includes that electrical noise voltage magnitude changes with time song
Electrical noise voltage magnitude versus time curve progress Fourier transformation is obtained corresponding frequency spectrum by line.
4. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 1,
Be characterized in that: obtaining the frequency of impact spectrum of the acceleration sensor system to be detected the following steps are included:
The acceleration pick-up sensor to be checked is mounted in the metallic rod with certain draw ratio；
The metallic rod for being equipped with the acceleration pick-up sensor to be checked is freely fallen from certain height and is put on ground
The metal anvil set collides, to generate the impact acceleration of amplitude；
The acceleration transducer is directly recorded in the way of multi-channel data acquisition to change over time during impact
Second series output waveform；
Second series output waveform progress Fourier transformation is obtained into corresponding frequency spectrum；
Determine the acceleration transducer natural reonant frequency peak in the frequency spectrum including high frequency electrical noise resonance signal peak
Position composed to get to the frequency of impact to acceleration pick-up sensor.
5. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 4,
Be characterized in that: the second series output waveform that the acceleration transducer changes over time during impact includes voltage
Voltage magnitude versus time curve progress Fourier transformation is obtained corresponding frequency by amplitude versus time curve
Rate spectrum.
6. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 1 or 4,
It is characterized by: the acceleration pick-up sensor to be checked is mounted in the metallic rod along sensitive direction.
7. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 1 or 4,
It is characterized by: the acceleration pick-up sensor to be checked is mounted in the metallic rod along axis direction is intersected.
8. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 1,
It is characterized in that: determining the resonant frequency of the acceleration transducer according to frequency of impact spectrum and the electrical noise frequency spectrum
Method particularly includes: according to the electrical noise frequency spectrum, remove identical as the electrical noise frequency spectrum in the frequency of impact spectrum
Electric signal formant to get arrive the acceleration transducer resonant frequency.
9. the extracting method of the identifiable high-range acceleration transducer resonant frequency of noise according to claim 1,
Be characterized in that: the resonant frequency of the acceleration transducer is first order resonance frequency or high order resonance frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833591.XA CN106443071B (en) | 2016-09-20 | 2016-09-20 | The extracting method of the identifiable high-range acceleration transducer resonant frequency of noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833591.XA CN106443071B (en) | 2016-09-20 | 2016-09-20 | The extracting method of the identifiable high-range acceleration transducer resonant frequency of noise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106443071A CN106443071A (en) | 2017-02-22 |
| CN106443071B true CN106443071B (en) | 2019-09-13 |
Family
ID=58165937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610833591.XA Active CN106443071B (en) | 2016-09-20 | 2016-09-20 | The extracting method of the identifiable high-range acceleration transducer resonant frequency of noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106443071B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020688B (en) * | 2017-10-30 | 2019-11-12 | 中国科学院上海微系统与信息技术研究所 | From spectrum Fourier transformation High-g accelerometer resonant frequency extracting method at times |
| CN108365706B (en) * | 2018-01-26 | 2020-12-15 | 瑞声科技（南京）有限公司 | Method and device for detecting resonant frequency of linear motor |
| CN111398635A (en) * | 2020-04-07 | 2020-07-10 | 嘉兴恩湃电子技术有限公司 | MEMS accelerometer noise test method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1742322A (en) * | 2003-01-24 | 2006-03-01 | 索尼爱立信移动通讯股份有限公司 | Noise reduction and audio-visual speech activity detection |
| CN1744435A (en) * | 2004-05-14 | 2006-03-08 | 本特利内华达有限责任公司 | Frequency rectification system, apparatus and method |
| CN1804563A (en) * | 2005-10-14 | 2006-07-19 | 北京交通大学 | Impact and vibration method for measuring natural frequency of bridge lower structure |
| JP2007017365A (en) * | 2005-07-11 | 2007-01-25 | Yaskawa Electric Corp | Vibration detection device |
| CN101354284A (en) * | 2008-09-19 | 2009-01-28 | 中国科学院上海微系统与信息技术研究所 | Method for testing resonance frequency of high range piezoresistance acceleration sensor |
| CN101539113A (en) * | 2008-03-17 | 2009-09-23 | 西门子公司 | Apparatus and method for determining a resonant frequency of a wind turbine tower |
| JP2011022122A (en) * | 2009-07-16 | 2011-02-03 | Keycom Corp | Extremely short electromagnetic pulse spectrum measuring system |
| CN104364845A (en) * | 2012-05-01 | 2015-02-18 | 株式会社理光 | Processing apparatus, processing method, program, computer readable information recording medium and processing system |
| CN104634443A (en) * | 2013-11-11 | 2015-05-20 | 国家电网公司 | Method for processing corona audible noise of high-voltage direct-current power transmission line under high background noise |
-
2016
- 2016-09-20 CN CN201610833591.XA patent/CN106443071B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1742322A (en) * | 2003-01-24 | 2006-03-01 | 索尼爱立信移动通讯股份有限公司 | Noise reduction and audio-visual speech activity detection |
| CN1744435A (en) * | 2004-05-14 | 2006-03-08 | 本特利内华达有限责任公司 | Frequency rectification system, apparatus and method |
| JP2007017365A (en) * | 2005-07-11 | 2007-01-25 | Yaskawa Electric Corp | Vibration detection device |
| CN1804563A (en) * | 2005-10-14 | 2006-07-19 | 北京交通大学 | Impact and vibration method for measuring natural frequency of bridge lower structure |
| CN101539113A (en) * | 2008-03-17 | 2009-09-23 | 西门子公司 | Apparatus and method for determining a resonant frequency of a wind turbine tower |
| CN101354284A (en) * | 2008-09-19 | 2009-01-28 | 中国科学院上海微系统与信息技术研究所 | Method for testing resonance frequency of high range piezoresistance acceleration sensor |
| JP2011022122A (en) * | 2009-07-16 | 2011-02-03 | Keycom Corp | Extremely short electromagnetic pulse spectrum measuring system |
| CN104364845A (en) * | 2012-05-01 | 2015-02-18 | 株式会社理光 | Processing apparatus, processing method, program, computer readable information recording medium and processing system |
| CN104634443A (en) * | 2013-11-11 | 2015-05-20 | 国家电网公司 | Method for processing corona audible noise of high-voltage direct-current power transmission line under high background noise |
Non-Patent Citations (1)
| Title |
|---|
| 识别中低高度桥墩自振频率的冲击振动试验法;战家旺 等;《中国铁道科学》;20080131;第29卷(第1期);第31-35页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106443071A (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106443071B (en) | The extracting method of the identifiable high-range acceleration transducer resonant frequency of noise | |
| CN105571961B (en) | Induction Hopkinson strut and tie loading device and experimental method | |
| CN101561379B (en) | Tap-scanning method for detecting structural damages | |
| CN101566541B (en) | System for evaluating tensile damage of in-service 16Mn steel force-bearing part by adopting catastrophic model | |
| CN107607247B (en) | Explosive explosion impulse and wind pressure combined test method | |
| CN104808124A (en) | Acoustic-electric combined positioning method of switch cabinet local discharge fault positions | |
| CN106842092A (en) | Sensor Frequency Response scaling method and device in live testing apparatus for local discharge | |
| CN105547825A (en) | Device and method for monitoring rock sample damage in uniaxial compression process | |
| CN111665152A (en) | Material dynamic compression circulating loading device and method thereof | |
| CN102890117A (en) | Method and device for detecting anchoring quality of long anchor cable | |
| CN103760044A (en) | Device and method for dynamic splitting tensile mechanical property test of cement-based material | |
| CN104330460A (en) | Device and method for detecting high-strength steel | |
| CN102080955B (en) | Moving load locating method used for bridge safety inspection | |
| CN105717191A (en) | Detection method and device for magnetic Barkhausen noise signal and magnetic parameters | |
| CN102788709A (en) | Automatic remainder detection device and method for spaceborne electronic equipment | |
| CN101539588B (en) | Half-bridge test method for mode resonance frequency of piezoresistive acceleration sensor | |
| CN104132792A (en) | Device and method for using laser displacement signals for testing bridge floor flexibility | |
| CN104122025A (en) | Wireless passive rope tension sensor based on surface acoustic waves | |
| CN201226029Y (en) | Optical fiber and grating seismic detector | |
| CN104913988A (en) | Hopkinson principle-based concrete axial tensile strength measuring method | |
| CN108020688B (en) | From spectrum Fourier transformation High-g accelerometer resonant frequency extracting method at times | |
| CN108593769B (en) | Normalized signal excitation nondestructive testing method by using multichannel control elastic wave | |
| CN111174690A (en) | Device and method for detecting burial depth of road guardrail upright post | |
| CN106019361A (en) | Moving coil type dual-parameter geophone and detection system | |
| CN104407173B (en) | Jerk acceleration transducer intersects the space partial wave method of testing of axle response |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |