CN110160629A - A kind of scaling method and device of sensing system of fiber strain - Google Patents
A kind of scaling method and device of sensing system of fiber strain Download PDFInfo
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- CN110160629A CN110160629A CN201910561071.1A CN201910561071A CN110160629A CN 110160629 A CN110160629 A CN 110160629A CN 201910561071 A CN201910561071 A CN 201910561071A CN 110160629 A CN110160629 A CN 110160629A
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- shake table
- sensor fibre
- electronic detector
- fiber strain
- sensing system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
- G01H9/006—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors the vibrations causing a variation in the relative position of the end of a fibre and another element
Abstract
The present invention provides a kind of scaling methods of sensing system of fiber strain: weight platform being hung on stainless steel frame by sensor fibre, and adjusts the height of shake table；Electronic detector is placed on shake table；The Oscillation Amplitude and frequency size of shake table are set；According to Oscillation Amplitude and frequency size, the first displacement of shake table is obtained, while measuring the speed of shake table by electronic detector；It is the second displacement of shake table by the rate conversion of shake table；The goodness of fit of shake table is calculated, to complete the calibration to sensing system of fiber strain.The present invention also provides a kind of caliberating devices of sensing system of fiber strain.The present invention makes sensor fibre and electronic detector measure the motion process of shake table simultaneously, and the motion information for measuring it respectively is fitted, and the deformation quantity of sensor fibre can be matched with the Oscillation Amplitude of shake table, to improve the accuracy of sensing system of fiber strain, it is ensured that the reasonability and feasibility of scaling method.
Description
Technical field
The invention belongs to technical field of optical fiber sensing more particularly to the scaling methods and dress of a kind of sensing system of fiber strain
It sets.
Background technique
As fiber strain sensing technology is increasingly mature, and start to replace electronic detector in certain applications, still
Optical fiber sensing system measurement strain size whether coincide with actual strain size, the vibration frequency range that can accurately measure with
And Oscillation Amplitude range is how many, these problems require to determine answer by stringent calibration.Do not occur also at present effectively
Scaling scheme, the strain of optical fiber can be made to accurately reflect the movement of shake table and make electronic detector and fibre strain
The physical quantity of sensor-based system measurement is corresponding.
Summary of the invention
For above-mentioned deficiency in the prior art, a kind of scaling method of sensing system of fiber strain provided by the invention and
Device can accurately reflect the movement of shake table, and measure shake table simultaneously using electronic detector and sensor fibre
Displacement, can be effectively reflected the accuracy of sensing system of fiber strain.
In order to reach the goals above, the technical solution adopted by the present invention are as follows:
This programme provides a kind of scaling method of sensing system of fiber strain, includes the following steps:
S1, weight platform is hung on stainless steel frame by sensor fibre, and adjusts the height of shake table；
S2, electronic detector is placed on the shake table；
S3, the Oscillation Amplitude and frequency size that the shake table is set by shake table control unit；
S4, according to the Oscillation Amplitude and frequency size, the optical signal of sensor fibre is demodulated by demodulating unit,
The first displacement of the shake table is obtained, while measuring the speed of the shake table by the electronic detector；
S5, by the rate conversion of the shake table be shake table second displacement；
S6, the fitting that shake table is calculated with the second displacement of the shake table according to the first of the shake table the displacement
Goodness, to complete the calibration to sensing system of fiber strain.
Further, the height of shake table is adjusted in the step S1, specifically:
When the weight platform is sling by sensor fibre, the bottom surface of the weight platform and the shake table water are kept
It is flat, and the sensor fibre is kept tightly to keep taut state.
Still further, the step S4 includes the following steps:
S401, shake table is controlled with a fixed frequency and different Oscillation Amplitudes by small by shake table control unit
To being vibrated greatly, and optical signal of the sensor fibre under the fixed frequency is demodulated by demodulating unit and is vibrated
The first of platform is displaced, while measuring the speed of shake table under the fixed frequency by the electronic detector；
S402, the frequency for changing shake table vibration repeat step S401, by demodulating unit by sensor fibre in different frequencies
Optical signal under rate is demodulated to obtain the first displacement of shake table, while by the electronic detector in the different frequency
Under measure the speed of shake table；
S403, by shake table control unit control shake table with fixed an Oscillation Amplitude and different frequency by it is small to
It is vibrated greatly, and is demodulated to obtain by optical signal of the sensor fibre under the Oscillation Amplitude of the fixation by demodulating unit
The first of shake table is displaced, while measuring the speed of shake table under the Oscillation Amplitude of the fixation by the electronic detector
Degree；
S404, the Oscillation Amplitude for changing shake table repeat step S403, by demodulating unit by sensor fibre in different width
Optical signal under the vibration of degree is demodulated to obtain the first displacement of the shake table, while by the electronic detector in institute
State the speed that shake table is measured under the vibration of different amplitudes.
Still further, the rate conversion for the shake table for measuring the electronic detector in the step S5 is shake table
Second displacement S, expression formula is as follows:
Wherein, VppIndicate that the peak value for the shake table speed signal that electronic detector measures, L indicate the dynamic of electronic detector
Coefficient, T indicate the vibration period of shake table.
Based on the above method, the invention also discloses a kind of caliberating devices of sensing system of fiber strain, including optical fiber to answer
The vibration generation subsystem for becoming sensing subsystem, being connect with the fiber strain sensing subsystem, and be located at the vibration and send out
Electronic detector on raw subsystem, wherein
The sensor fibre that the fiber strain sensing subsystem includes demodulating unit, is connect with the demodulating unit, and
The stainless steel frame and weight platform being connect respectively with the sensor fibre, wherein the weight platform is located at vibration hair
On raw subsystem；
It includes shake table that subsystem, which occurs, for the vibration, and the shake table control unit connecting with the shake table；
The electronic detector is located on the shake table.
Further, the height of the stainless steel frame is at least 2 meters, and it is fixed on ground.
Still further, the length of the sensor fibre is at least 20 meters, and it is in the weight platform and stainless steel frame
Between at least wind 10 circles.
Still further, the weight of the weight platform is greater than 4kg.
Still further, the electronic detector is PS-10R velocity profile electronic detector.
Still further, the demodulating unit obtains sensor fibre for demodulating the optical signal in sensor fibre
Deformation quantity；
The sensor fibre is obtained for connecting stainless steel frame and weight platform by the deformation quantity of the sensor fibre
The displacement of shake table；
The stainless steel frame is fixed on ground, for hanging weight platform；
The weight platform hangs on the sensor fibre bottom, and is located on the shake table, for passing through shake table
Vibration make sensor fibre generate deformation；
The shake table makes weight platform band by the vibration of shake table for placing weight platform and electronic detector
Dynamic sensor fibre generates deformation, while so that electronic detector is measured the speed of shake table by the vibration of shake table；
The shake table control unit is used to control the Oscillation Amplitude and frequency size of the shake table；
The rate conversion that the electronic detector is used to measure the shake table is voltage, obtains the position of the shake table
It moves.
Beneficial effects of the present invention:
(1) present invention, can be accurately anti-by the deformation quantity of sensor fibre and the displacement of corresponding shake table
The movement of shake table is mirrored, and electronic detector measures simultaneously with sensing system of fiber strain, light can be effectively reflected
The accuracy of fine strain sensing system, operation of the present invention is simple, and the deformation quantity of optical fiber can be with the Oscillation Amplitude of shake table
Matching, it is ensured that the reasonability and feasibility of scaling method；
(2) the electronics detection in fibre strain amount and shake table obtained in the present invention by fiber strain sensing subsystem
The vibration signal that device detects carries out quantitative comparison, to improve the accuracy of sensing system of fiber strain.
Detailed description of the invention
Fig. 1 is flow chart of the method for the present invention.
Fig. 2 is control structure schematic diagram of the invention.
Fig. 3 is the simple structure schematic diagram of fiber strain sensing subsystem calibration in the present invention.
Fig. 4 is the concrete structure schematic diagram of fiber strain sensing subsystem calibration in the present invention.
Fig. 5 is fiber strain sensing subsystem and electronic detector time domain waveform 10Hz normalization display pair in the present embodiment
Than figure.
Fig. 6 is fiber strain sensing subsystem and electronic detector time domain waveform 20Hz normalization display pair in the present embodiment
Than figure.
Fig. 7 is fiber strain sensing subsystem and electronic detector time domain waveform 30Hz normalization display pair in the present embodiment
Than figure.
Fig. 8 is that fiber strain sensing subsystem and electronic detector respond comparison diagram in the present embodiment.
Fig. 9 is the drive amplitude response signal that sensing system of fiber strain is vibrated in shake table 2Hz frequency in the present embodiment
Figure.
Figure 10 is the drive amplitude response signal that sensing system of fiber strain is vibrated in shake table 5Hz frequency in the present embodiment
Figure.
Figure 11 is that sensing system of fiber strain shows in the drive amplitude response that shake table 10Hz frequency is vibrated in the present embodiment
It is intended to.
Figure 12 is that sensing system of fiber strain shows in the drive amplitude response that shake table 20Hz frequency is vibrated in the present embodiment
It is intended to.
Figure 13 is that sensing system of fiber strain shows in the drive amplitude response that shake table 30Hz frequency is vibrated in the present embodiment
It is intended to.
Figure 14 is that sensing system of fiber strain shows in the drive amplitude response that shake table 50Hz frequency is vibrated in the present embodiment
It is intended to.
Figure 15 is that sensing system of fiber strain shows in the drive amplitude response that shake table 70Hz frequency is vibrated in the present embodiment
It is intended to.
Figure 16 sheet is that sensing system of fiber strain shows in the drive amplitude response that shake table 100Hz frequency is vibrated in embodiment
It is intended to.
Specific embodiment
A specific embodiment of the invention is described below, in order to facilitate understanding by those skilled in the art this hair
It is bright, it should be apparent that the present invention is not limited to the ranges of specific embodiment, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, these variations are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the column of protection.
Embodiment
As shown in Figure 1, a kind of scaling method of sensing system of fiber strain, its implementation are as follows:
S1, weight platform is hung on stainless steel frame by sensor fibre, and adjusts the height of shake table, wherein institute
The height for stating stainless steel frame is at least 2 meters, and it is fixed on ground, and the length of the sensor fibre is at least 20 meters, and its
10 circles are at least wound between the weight platform and stainless steel frame, the weight of the weight platform is greater than 4kg, when the weight
When platform is sling by sensor fibre, the bottom surface of the weight platform and the shake table keep horizontal, and the sensor fibre is protected
Hold tight state；
S2, electronic detector is placed on the shake table, wherein the electronic detector is PS-10R velocity profile electricity
Sub- wave detector；
S3, the Oscillation Amplitude and frequency size that the shake table is set by shake table control unit；
S4, according to the Oscillation Amplitude and frequency size, the optical signal of sensor fibre is demodulated by demodulating unit,
The first displacement of the shake table is obtained, while measuring the speed of the shake table by the electronic detector comprising such as
Lower step:
S401, shake table is controlled with a fixed frequency and different Oscillation Amplitudes by small by shake table control unit
To being vibrated greatly, and optical signal of the sensor fibre under the fixed frequency is demodulated by demodulating unit and is vibrated
The first of platform is displaced, while measuring the speed of shake table under the fixed frequency by the electronic detector；
S402, the frequency for changing shake table vibration repeat step S401, by demodulating unit by sensor fibre in different frequencies
Optical signal under rate is demodulated to obtain the first displacement of shake table, while by the electronic detector in the different frequency
Under measure the speed of shake table；
S403, by shake table control unit control shake table with fixed an Oscillation Amplitude and different frequency by it is small to
It is vibrated greatly, and is demodulated to obtain by optical signal of the sensor fibre under the Oscillation Amplitude of the fixation by demodulating unit
The first of shake table is displaced, while measuring the speed of shake table under the Oscillation Amplitude of the fixation by the electronic detector
Degree；
S404, the Oscillation Amplitude for changing shake table repeat step S403, by demodulating unit by sensor fibre in different width
Optical signal under the vibration of degree is demodulated to obtain the first displacement of the shake table, while by the electronic detector in institute
State the speed that shake table is measured under the vibration of different amplitudes；
S5, be by the rate conversion of the shake table shake table second displacement, the expression formula of second displacement S is as follows:
Wherein, VppIndicate that the peak value for the shake table speed signal that electronic detector measures, L indicate the dynamic of electronic detector
Coefficient, T indicate the vibration period of shake table；
S6, the fitting that shake table is calculated with the second displacement of the shake table according to the first of the shake table the displacement
Goodness, to complete the calibration to sensing system of fiber strain.
As shown in Fig. 2, it is based on the above method, the present invention also provides a kind of caliberating device of sensing system of fiber strain,
Subsystem occurs, and is located at including fiber strain sensing subsystem, the vibration being connect with the fiber strain sensing subsystem
Electronic detector on subsystem occurs for the vibration, wherein
The sensor fibre that the fiber strain sensing subsystem includes demodulating unit, is connect with the demodulating unit, and
The stainless steel frame and weight platform being connect respectively with the sensor fibre, wherein the weight platform is located at vibration hair
On raw subsystem；
It includes shake table that subsystem, which occurs, for the vibration, and the shake table control unit connecting with the shake table；
The electronic detector is located on the shake table；
The demodulating unit obtains the deformation quantity of sensor fibre for demodulating the optical signal in sensor fibre；
The sensor fibre is obtained for connecting stainless steel frame and weight platform by the deformation quantity of the sensor fibre
The displacement of shake table；
The stainless steel frame is fixed on ground, for hanging weight platform；
The weight platform hangs on the sensor fibre bottom, and is located on the shake table, for passing through shake table
Vibration make sensor fibre generate deformation；
The shake table makes weight platform band by the vibration of shake table for placing weight platform and electronic detector
Dynamic sensor fibre generates deformation, while so that electronic detector is measured the speed of shake table by the vibration of shake table；
The shake table control unit is used to control the Oscillation Amplitude and frequency size of the shake table；
The rate conversion that the electronic detector is used to measure the shake table is voltage, obtains the position of the shake table
It moves.
In a particular embodiment, as Figure 3-Figure 4, the fiber strain sensing subsystem can demodulate sensor fibre
The deformation that upper somewhere occurs, a weight platform is hung in stainless steel shelf with sensor fibre, vibration of the adjustment for calibration
Dynamic platform height makes weight platform base contact vibration platform again tighten optical fiber holding, meanwhile, the electricity of standard is placed on a vibration table
Sub- wave detector detects the vibration of shake table with sensing system of fiber strain simultaneously, and shake table drives weight platform when the vibrations are up and down,
Optical fiber telescopic deformation therewith, the fibre strain amount reflection obtained by light strain sensing subsystem is shake table displacement,
And therefore the speed that the signal that the electronic detector on shake table detects is vibration shake table measures electronic detector
Speed is converted into the displacement that displacement is measured with sensor fibre again and is fitted, to obtain the accuracy of optical fiber sensing system.
In order to further be illustrated to this programme, following data is now enumerated:
By a part of Optical Fiber Winding of sensor fibre in stainless steel and the vibration that on weight platform, weight platform passes through shake table
Dynamic to generate corresponding vibration signal, making sensor fibre, deformation occurs, obtains the displacement of shake table, while electronic detector will be surveyed
The rate conversion of the shake table obtained obtains the displacement of shake table at voltage, then by the voltage.Such as Fig. 5, Fig. 6 and Fig. 7 institute
Show, the frequency of shake table control unit driving signal is respectively set to drive under 10Hz, 20Hz, 30Hz, each frequency and is believed
Number voltage 2 points are taken within the scope of 0.05V~400V, make shake table simultaneously to fiber strain sensing subsystem, electronics detection
Device carries out signal excitation, measures the voltage value waveform of fiber strain sensing subsystem displacement amplitude waveform, electronic detector, finally
The comparison of wave shape of fiber strain sensing subsystem and electronic detector acquisition data under same dimension is analyzed, two sets of waveforms are compared
The goodness of fit.By Fig. 5, Fig. 6 and Fig. 7 it is found that the waveform signal base of fiber strain sensing subsystem and electronic detector acquisition
This is consistent.
It is tested for frequency response: by a part of Optical Fiber Winding of sensor fibre on stainless steel and weight platform, weight
Platform can generate corresponding vibration signal by the vibration of shake table, and making sensor fibre, deformation occurs, obtain the displacement of shake table,
The rate conversion of the shake table measured is obtained the displacement of shake table at voltage, then by the voltage by electronic detector simultaneously.
As shown in figure 8, definite value is arranged in the voltage magnitude of shake table control unit driving vibration signal, frequency is in 1Hz-100Hz range
6 Frequency points are inside taken, while signal excitation is carried out to fiber strain sensing subsystem and electronic detector, measurement fibre strain passes
Feel subsystem displacement amplitude, the voltage value of electronic detector, ultimate analysis fiber strain sensing subsystem and electronic detector are adopted
Collect linearity relationship of the data under same dimension, obtains frequency response of the sensing system of fiber strain under same Oscillation Amplitude
Curve.As shown in Figure 8, fiber strain sensing subsystem and electronic detector frequency response are almost the same.
It is tested for amplitude response under different frequency: a part of Optical Fiber Winding of sensor fibre is put down in stainless steel and weight
On platform, weight platform can generate corresponding vibration signal by the vibration of shake table, and making sensor fibre, deformation occurs, is vibrated
The displacement of platform, while electronic detector is vibrated the rate conversion of the shake table measured at voltage, then by the voltage
The displacement of platform.As shown in Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15 and Figure 16, shake table control unit is driven
The frequency of signal is respectively set to 2Hz, 5Hz, 10Hz, 20Hz, 30Hz, 50Hz, 70Hz, 100Hz, and letter is driven under each frequency
Number voltage it is incremented by successively, make shake table simultaneously to fiber strain sensing subsystem, electronic detector carry out signal excitation, measurement
The voltage value of sensing system of fiber strain displacement amplitude, electronic detector, ultimate analysis fiber strain sensing subsystem and electronics
Wave detector acquires linearity relationship of the data under same dimension, obtains width of the sensing system of fiber strain under each single-frequency
Spend response curve.By Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15 and Figure 16 it is found that sensor fibre is in 2-100Hz
It is linear response in range, goodness of fit R2 is all larger than 0.99, then illustrates that the amplitude response of fiber strain sensing subsystem is
The linear response and linearity is fine.
The present invention makes sensor fibre and electronic detector measure the movement of shake table simultaneously by design above, passes through optical fiber
The vibration signal that the electronic detector in fibre strain amount and shake table that strain sensing subsystem obtains detects is quantified
Compare, to improve the accuracy of optical fiber sensing system.Operation of the present invention is simple, and the deformation quantity of optical fiber can be with vibration
The Oscillation Amplitude of platform matches, it is ensured that the reasonability and feasibility of scaling method.
Claims (10)
1. a kind of scaling method of sensing system of fiber strain, which comprises the steps of:
S1, weight platform is hung on stainless steel frame by sensor fibre, and adjusts the height of shake table；
S2, electronic detector is placed on the shake table；
S3, the Oscillation Amplitude and frequency size that the shake table is set by shake table control unit；
S4, according to the Oscillation Amplitude and frequency size, the optical signal of sensor fibre is demodulated by demodulating unit, is obtained
The first of the shake table is displaced, while the speed of the shake table is measured by the electronic detector；
S5, by the rate conversion of the shake table be shake table second displacement；
S6, according to the first of the shake table displacement and the shake table second displacement be calculated shake table fitting it is excellent
Degree, to complete the calibration to sensing system of fiber strain.
2. the scaling method of sensing system of fiber strain according to claim 1, which is characterized in that adjusted in the step S1
The height of whole shake table, specifically:
When the weight platform is sling by sensor fibre, keep the bottom surface of the weight platform and the shake table horizontal, and
The sensor fibre is kept tightly to keep taut state.
3. the scaling method of sensing system of fiber strain according to claim 1, which is characterized in that the step S4 includes
Following steps:
S401, by shake table control unit control shake table it is ascending with a fixed frequency and different Oscillation Amplitudes
It is vibrated, and is demodulated optical signal of the sensor fibre under the fixed frequency to obtain shake table by demodulating unit
First is displaced, while measuring the speed of shake table under the fixed frequency by the electronic detector；
S402, change shake table vibration frequency, repeat step S401, by demodulating unit by sensor fibre at different frequencies
Optical signal demodulated to obtain the first displacement of shake table, while being surveyed under the different frequency by the electronic detector
Obtain the speed of shake table；
S403, by shake table control unit control shake table with a fixed Oscillation Amplitude and different frequency it is ascending into
Row vibration, and optical signal of the sensor fibre under the Oscillation Amplitude of the fixation is demodulated by demodulating unit and is vibrated
The first of platform is displaced, while measuring the speed of shake table under the Oscillation Amplitude of the fixation by the electronic detector；
S404, the Oscillation Amplitude for changing shake table repeat step S403, by demodulating unit by sensor fibre in different amplitudes
The lower optical signal of vibration is demodulated to obtain the first displacement of the shake table, at the same pass through the electronic detector it is described not
With the speed for measuring shake table under the vibration of amplitude.
4. the scaling method of sensing system of fiber strain according to claim 1, which is characterized in that will in the step S5
The rate conversion for the shake table that the electronic detector measures is the second displacement S of shake table, and expression formula is as follows:
Wherein, VppIndicate that the peak value for the shake table speed signal that electronic detector measures, L indicate the dynamical system of electronic detector
Number, T indicate the vibration period of shake table.
5. a kind of caliberating device of sensing system of fiber strain, which is characterized in that including fiber strain sensing subsystem, with it is described
Subsystem occurs for the vibration of fiber strain sensing subsystem connection, and the electronics detection on subsystem occurs positioned at the vibration
Device, wherein
The sensor fibre that the fiber strain sensing subsystem includes demodulating unit, is connect with the demodulating unit, and respectively
The stainless steel frame and weight platform being connect with the sensor fibre, wherein the weight platform is located at the vibration and son occurs
In system；
It includes shake table that subsystem, which occurs, for the vibration, and the shake table control unit connecting with the shake table；
The electronic detector is located on the shake table.
6. the caliberating device of sensing system of fiber strain according to claim 5, which is characterized in that the stainless steel frame
Height is at least 2 meters, and it is fixed on ground.
7. the caliberating device of sensing system of fiber strain according to claim 5, which is characterized in that the sensor fibre
Length is at least 20 meters, and it at least winds 10 circles between the weight platform and stainless steel frame.
8. the caliberating device of sensing system of fiber strain according to claim 5, which is characterized in that the weight platform
Weight is greater than 4kg.
9. the caliberating device of sensing system of fiber strain according to claim 5, which is characterized in that the electronic detector
For PS-10R velocity profile electronic detector.
10. the caliberating device of sensing system of fiber strain according to claim 5, which is characterized in that the demodulating unit
For demodulating the optical signal in sensor fibre, the deformation quantity of sensor fibre is obtained；
The sensor fibre is vibrated for connecting stainless steel frame and weight platform by the deformation quantity of the sensor fibre
The displacement of platform；
The stainless steel frame is fixed on ground, for hanging weight platform；
The weight platform hangs on the sensor fibre bottom, and is located on the shake table, for the vibration by shake table
It is dynamic that sensor fibre is made to generate deformation；
The shake table drives weight platform by the vibration of shake table and passes for placing weight platform and electronic detector
It is photosensitive it is fine generate deformation, while so that electronic detector is measured the speed of shake table by the vibration of shake table；
The shake table control unit is used to control the Oscillation Amplitude and frequency size of the shake table；
The rate conversion that the electronic detector is used to measure the shake table is voltage, obtains the displacement of the shake table.
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| WO2020259591A1 (en) * | 2019-06-26 | 2020-12-30 | 电子科技大学 | Calibration method and device for optical fiber strain sensing system |
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Also Published As
| Publication number | Publication date |
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| CN110160629B (en) | 2020-05-26 |
| WO2020259591A1 (en) | 2020-12-30 |
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