CN206618777U - A kind of caliberating device of single-axis acceleration sensors - Google Patents
A kind of caliberating device of single-axis acceleration sensors Download PDFInfo
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- CN206618777U CN206618777U CN201720276569.XU CN201720276569U CN206618777U CN 206618777 U CN206618777 U CN 206618777U CN 201720276569 U CN201720276569 U CN 201720276569U CN 206618777 U CN206618777 U CN 206618777U
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- acceleration
- signal
- piezoelectric
- cantilever beam
- flexible cantilever
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Abstract
The utility model discloses a kind of caliberating device of single-axis acceleration sensors, including flexible cantilever beam, laser displacement sensor, piezoelectric actuator, acceleration transducer, charge amplifier, piezoelectric amplifier, signal generator, A/D change datas capture card and computer；The accumulation signal produced by signal generator is output to piezoelectric actuator after piezoelectric amplifier, the vibration of flexible cantilever beam first step mode is encouraged, the vibration signal that acceleration transducer and laser displacement sensor are detected respectively inputs computer after motion control card carries out A/D conversions.According to displacement and the relation of acceleration, the corresponding relation drawn between the voltage signal and actual acceleration value of acceleration transducer measurement is resolved.
Description
Technical field
The utility model is related to flexible structure vibration analysis field, and in particular to a kind of demarcation of single-axis acceleration sensors
Device.
Background technology
Acceleration transducer is in the vibration measurement and control of flexible structure, and the field such as structural dynamical model is widely used.
The situation for carrying out feedback control and dynamic analysis using acceleration transducer measurement signal is very universal.In feedback control and dynamic
In state analysis, the acceleration transducer of use has piezoelectric type, pressure resistance type, condenser type etc..Or they detect signal by electricity
Lotus amplifier amplifies, otherwise what is obtained after the amplification of built-in or extension amplifying circuit is analog quantity voltage signal.
If necessary to accurately know the measured value of voltage signal correspondence actual acceleration, prior art needs special acceleration
Sensor calibration apparatus is spent, the caliberating device of special purchase acceleration transducer is so accomplished by.The situation of caliberating device application
Seldom, being just out of use after acceleration sensor calibration, in addition it is also necessary to deposit, care and maintenance etc..So typically buying acceleration
The unit that sensor carries out experimental study does not buy acceleration sensor calibration device.
Utility model content
In order to overcome the shortcoming and deficiency that prior art is present, the utility model provides a kind of single-axis acceleration sensors
Caliberating device.
The utility model is adopted the following technical scheme that：
A kind of caliberating device of single-axis acceleration sensors, including flexible cantilever beam, laser displacement sensor, Piezoelectric Driving
Device, acceleration transducer, charge amplifier, piezoelectric amplifier, signal generator, A/D change datas capture card and computer；
Described flexible cantilever beam one end is fixed with pedestal is referred to as fixing end, and the other end is free end, the acceleration sensing
Device and laser displacement sensor are arranged on two relative sides of flexible beam, and the piezoelectric actuator is pasted onto flexible cantilever beam
Close to the position of fixing end, the pumping signal of signal generator is output on piezoelectric actuator by piezoelectric amplifier, it is described
The acceleration signal of the flexible cantilever beam of acceleration transducer measurement is output to A/D change datas after charge amplifier amplifies
Computer, the transverse vibrational displacement letter of the laser displacement sensor detection flexible cantilever beam respective point are inputted after capture card conversion
Number by A/D change datas capture card conversion after input computer.
The measurement axis for installing initial position alignment acceleration transducer of laser displacement sensor, i.e., measurement direction is several
What center.
The acceleration transducer is piezoelectric transducer or capacitance type sensor.
The piezoelectric actuator is at least made up of two panels piezoelectric ceramic piece.
A kind of scaling method of the caliberating device of application single-axis acceleration sensors, comprises the following steps：
The first step, identification obtains the first rank vibration modal frequency of the flexible cantilever beam；
Second step, signal generator generation signal frequency is identical with the first rank vibration modal frequency, by piezoelectric amplifier
Rear-guard dynamic pressure electric drive, encourages the vibration of the first step mode of flexible cantilever beam；
3rd step, the acceleration information of acceleration transducer detection flexible cantilever beam vibration passes through charge amplifier and A/D
Change data capture card inputs computer after being changed, while laser displacement sensor detects the horizontal stroke of flexible cantilever beam respective point
To vibration displacement information computer is inputted by A/D change datas capture card；
4th step, according to the relation between the lateral displacement and acceleration signal of flexible cantilever beam measurement point, is accelerated
The corresponding relation spent between the magnitude of voltage of signal and measurement acceleration, so as to complete the demarcation of acceleration transducer.
According to the relation between the lateral displacement and acceleration signal of flexible cantilever beam measurement point in 4th step, obtain
Corresponding relation between the magnitude of voltage and measurement acceleration of acceleration signal, be specially：
The vibration lateral displacement signal of laser displacement sensor measurement：
T represents time variable in formula,Represent phase angle, ω1It is the first rank vibration modal frequency of flexible beam, A1It is horizontal
To the amplitude of vibration displacement signal, unit is " rice (m) "；
The vibration acceleration signal of acceleration transducer measurement：T represents the time in formula
Variable,Represent phase angle, ω1It is the first rank vibration modal frequency of flexible beam, A2It is the width of lateral vibration acceleration signal
Value, analog voltage signal, unit is " volt (V) "；
Due to the displacement of same point and acceleration information, frequencies omega on the flexible cantilever beam of measurement1All it is flexible beam
First rank vibration modal frequency；Both displacement and acceleration signal are second-order differential relations, soAlso
It is to say,Unit is " volt (V) "；
To the displacement signal acceleration signal that differential process is obtained twice：
ThenCOEFFICIENT KAVIt is exactly the acceleration information of unit voltage correspondence time, so as to be passed to acceleration
The measured value of sensor is demarcated.
The beneficial effects of the utility model：
(1) caliberating device of acceleration transducer need not be specially bought, cost and storage is saved and safeguards acceleration
The cost of sensor calibration apparatus；
(2) device needs only to a simple piezoelectricity flexible cantilever boom device, and laser displacement sensor, acceleration are passed
Sensor and computer acquisition control system can just be demarcated to acceleration transducer, and device is simple, easily builds；
(3) by encouraging flexible beam modal vibration, the analog signalses and laser displacement of measurement acceleration transducer detection
The lateral displacement signal of sensor detection, according to the second differential joint between displacement and acceleration, sets up equation, it is possible to
It is readily available the corresponding actual acceleration information of magnitude of voltage of acceleration transducer measurement.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the caliberating device of single-axis acceleration sensors of the present utility model.
Embodiment
With reference to embodiment and accompanying drawing, the utility model is described in further detail, but reality of the present utility model
Apply mode not limited to this.
Embodiment
As shown in figure 1, a kind of caliberating device of single-axis acceleration sensors, including flexible cantilever beam 4, laser displacement sensing
Device 3, piezoelectric actuator 1, acceleration transducer 2, charge amplifier 9, piezoelectric amplifier 5, signal generator 6, A/D change datas
Capture card 8 and computer 7；
One end of the flexible cantilever beam 4 is fixed with pedestal is referred to as fixing end, and other end free vibration is referred to as free end.Pressure
Electric drive 1 is at least made up of two panels piezoelectric ceramic piece, flexible cantilever beam is symmetrically pasted onto close to the position of fixing end, in flexibility
An acceleration transducer 2 is installed on the surface of some position in the middle of cantilever beam, and installing laser displacement in its relative side passes
Laser displacement sensor is installed in sensor 3, adjustment, it is ensured that its measurement distance and measurement point, for measuring acceleration transducer measurement
The installation initial position alignment of vibration lateral displacement at the geometric center point of acceleration, specifically laser displacement sensor accelerates
The geometric center of the measurement axis, i.e. measurement direction of sensor is spent, measurement transverse vibrational displacement is exactly measurement vibration acceleration
Position, thus can accurately demarcate acceleration transducer measurement voltage and actual acceleration between relation.
The pumping signal of signal generator is output on piezoelectric actuator by piezoelectric amplifier, the acceleration sensing
The acceleration signal of the flexible cantilever beam of device measurement is output to the conversion of A/D change datas capture card after charge amplifier amplifies
After input computer, the transverse vibrational displacement signal of the laser displacement sensor detection flexible cantilever beam respective point passes through A/D
Computer is inputted after the conversion of change data capture card.
The acceleration transducer is that piezoelectric transducer or capacitance type sensor or other sensors can.
A kind of scaling method of single-axis acceleration sensors, including：
The frequencies omega that first first step mode for the flexible cantilever beam that identification is set up vibrates1, by swashing for signal generator
Encourage signal and be set as that frequency is ω1Sine output signal, vibration amplitude is adjusted to appropriate；Signal generator output signal
Piezoelectric actuator is output to after piezoelectric amplifier amplifies, the first step mode of flexible cantilever beam is encouraged by piezoelectric actuator
Vibration, by acceleration transducer detect flexible cantilever beam vibration acceleration information A/ is output to after charge amplifier
D change data capture cards input computer after conversion, while laser displacement sensor to be detected to the horizontal stroke of flexible beam respective point
To vibration displacement information computer is inputted after A/D is changed；
The transverse vibrational displacement signal of laser displacement sensor measurement is analog quantity voltage signal, and laser displacement sensor is defeated
The analog signalses gone out are easy to the measured value that correspondence goes out actual displacement；It is defeated and acceleration transducer is after charge amplifier
It is also analog quantity voltage signal to go out obtain, and acceleration simulation amount signal is difficult the actual acceleration of correspondence, so by such as
Lower scaling method is obtained：
The vibration lateral displacement signal that laser displacement sensor is measured in device：T in formula
Represent time variable,Represent phase angle, ω1It is the first rank vibration modal frequency of flexible beam, A1It is transverse vibrational displacement signal
Amplitude, unit is " rice (m) "；
The vibration acceleration signal that acceleration transducer is measured in device：T generations in formula
Table time variable,Represent phase angle, ω1It is the first rank vibration modal frequency of flexible beam, A2It is lateral vibration acceleration letter
Number amplitude, analog voltage signal, unit is " volt (V) "；
What it is due to measurement is the displacement of point and acceleration information, frequencies omega on flexible beam1All it is the first of flexible beam
Rank vibration modal frequency；Both displacement and acceleration signal are second-order differential relations, soNamely
Say,Unit is " volt (V) "；
To the displacement signal acceleration signal that differential process is obtained twice：Shake
The unit of dynamic amplitude is " meter per second2(m/s2)”；
So have,COEFFICIENT KAVIt is exactly the acceleration information of unit voltage correspondence time, unit is
In this manner it is possible to which the signal measured by acceleration transducer is gathered after charge amplifier amplifies by A/D
Obtained voltage signal, obtains the acceleration signal of its actual measurement, so as to be marked to the measured value of acceleration transducer
It is fixed.
Multiaxial motion of the present embodiment A/D change datas capture card 8 from the model GTS systems produced by Gu Gao companies
There are PCI-e slots, Ke Yian in control card, the CPU model core76650U2.2GHz that computer 7 is selected, internal memory 4G, mainboard
Fill motion control card 8.
Acceleration transducer 2 can select the CA-YD-127 piezoelectric acceleration transducers of Jiangsu Lian Neng companies production, electric charge
Amplifier 9 can select the YE5850 type ultralow frequency charge amplifiers of Jiangsu Lian Neng companies production.The optional day of laser displacement sensor 3
This Keyemce (KEYENCE) company produces, and often covers laser displacement sensor and is passed respectively by a laser probe, a laser displacement
Sensor controller and an extension cable composition, its model is respectively LK-500, LK-2500 and LK-C2.Laser displacement sensor
Powered using 24V dc sources, repeatable accuracy is 10um, the reference range of laser probe and measured surface is 350mm, measurement amount
Journey is -100mm~+100mm, and corresponding analog output voltage is -10V~+10V, and the linearity is ± 0.1%, and the sampling period is
1024us, when the distance between measured surface and laser probe exceed measurement range, its analog output voltage all will stay in that
12V。
Signal generator 6 contains general SPF20 types DDS digit synthesis function/any wave generator from Nanjing.Piezoelectricity is put
Big device 5 can select model APEX-PA241DW or APEX-PA240CX piezoelectric amplifier, and multiplication factor can reach 52 times, i.e.,
- 5V~+5V is amplified to -260~+260V, its research institute be South China Science ＆ Engineering University, applicant apply it is entitled " too
Empty sailboard bend and turning mode vibration simulation active control device and method ", the patent of Application No. 200810027186.4
In be discussed in detail.
Above-described embodiment is the utility model preferably embodiment, but embodiment of the present utility model is not by described
The limitation of embodiment, it is other it is any without departing from Spirit Essence of the present utility model with made under principle change, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, are included within protection domain of the present utility model.
Claims (4)
1. a kind of caliberating device of single-axis acceleration sensors, it is characterised in that sensed including flexible cantilever beam, laser displacement
Device, piezoelectric actuator, acceleration transducer, charge amplifier, piezoelectric amplifier, signal generator, A/D change data capture cards
And computer；
Described flexible cantilever beam one end and pedestal, which are fixed, is referred to as fixing end, and the other end is free end, the acceleration transducer and
Laser displacement sensor is arranged on two relative sides of flexible beam, and it is close that the piezoelectric actuator is pasted onto flexible cantilever beam
The position of fixing end, the pumping signal of signal generator is output on piezoelectric actuator by piezoelectric amplifier, described to accelerate
The acceleration signal of the flexible cantilever beam of degree sensor measurement is output to the collection of A/D change datas after charge amplifier amplifies
Computer, the transverse vibrational displacement signal warp of the laser displacement sensor detection flexible cantilever beam respective point are inputted after card conversion
Computer is inputted after crossing the conversion of A/D change datas capture card.
2. the caliberating device of a kind of single-axis acceleration sensors according to claim 1, it is characterised in that laser displacement is passed
The geometric center of the measurement axis, i.e. measurement direction of installing initial position alignment acceleration transducer of sensor.
3. a kind of caliberating device of single-axis acceleration sensors according to claim 1, it is characterised in that acceleration sensing
Device is piezoelectric transducer or capacitance type sensor.
4. the caliberating device of a kind of single-axis acceleration sensors according to claim 1, it is characterised in that the piezoelectricity drives
Dynamic device is at least made up of two panels piezoelectric ceramic piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720276569.XU CN206618777U (en) | 2017-03-21 | 2017-03-21 | A kind of caliberating device of single-axis acceleration sensors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720276569.XU CN206618777U (en) | 2017-03-21 | 2017-03-21 | A kind of caliberating device of single-axis acceleration sensors |
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| CN206618777U true CN206618777U (en) | 2017-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531119A (en) * | 2019-08-17 | 2019-12-03 | 歌尔股份有限公司 | A kind of method of acceleration transducer sensitivity confirmation |
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2017
- 2017-03-21 CN CN201720276569.XU patent/CN206618777U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531119A (en) * | 2019-08-17 | 2019-12-03 | 歌尔股份有限公司 | A kind of method of acceleration transducer sensitivity confirmation |
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Granted publication date: 20171107 Termination date: 20200321 |