CN206080489U - Magnetosonic signal detection and imaging system based on F P chamber fiber acoustic sensor - Google Patents
Magnetosonic signal detection and imaging system based on F P chamber fiber acoustic sensor Download PDFInfo
- Publication number
- CN206080489U CN206080489U CN201620354954.7U CN201620354954U CN206080489U CN 206080489 U CN206080489 U CN 206080489U CN 201620354954 U CN201620354954 U CN 201620354954U CN 206080489 U CN206080489 U CN 206080489U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- cavity
- detection
- type optical
- signal
- 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 - Reinstated
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a magnetosonic signal detection and imaging system based on F P chamber fiber acoustic sensor, including: the connection is at the induction coil of drive signal generating device output, correspond a pair of S who sets up in induction coil top and below respectively, N utmost point magnetostatic iron, be provided with the tissue that awaits measuring through a set of 4 dimension supporters that can carry out removal of the three direction of XYZ and coaxial rotation in the magnetostatic field between induction coil and N utmost point magnetostatic iron, it is used for detecting the await measuring detection of faint acoustical signal and the demodulating equipment of tissue magnetosonic signal of production under magnetostatic field and pulsed magnetic field's the combined action to be provided with in one side of the tissue that awaits measuring, faint acoustical signal detects and data acquisition and processing apparatus are connected to the output of demodulating equipment. The utility model discloses can effectively suppress the electromagnetic interference in the magnetosonic signal, realize in the acoustical signal sensing transmission course immunity to electromagnetic interference, and detectivity be high, stability is good, improves the detection quality of magnetosonic signal when guaranteeing high sensitivity, and then improve magnetosonic formation of image image reconstruction quality.
Description
Technical field
This utility model is related to a kind of magnetoacoustic signals detection and imaging system.It is more particularly to a kind of that there is electromagnetism interference
Based on F-P cavity fibre-optical acoustic sensor magnetoacoustic signals detection and imaging system.
Background technology
The electrical characteristic parameter of tissue is closely related with the physiologic information and pathological information of tissue.To the electrical characteristic parameter organized
Imaging, can carry out Function detection to the early lesion organized.Magnetosonic imaging technique is a kind of new lossless tissue electrical characteristics
Imaging technique, its magnetosonic coupling effect based on tissue change the caused curent change of institute biological tissue's electrical characteristics, by electricity
Magnetic induction produces Lorentz force, forms dither in organization internal, is converted into the ultrasonic signal comprising tissue electrical characteristics information
Detected.Magnetosonic imaging technique can be taken into account magnetography high-contrast and surpass due to finally rebuilding to acoustic field signal
The advantage of sound tomoscan high spatial resolution, with important researching value.
At this stage, the key for restricting the development of magnetosonic imaging technique is the detection of magnetoacoustic signals.Due to this height of magnetoacoustic signals
Level is faint, and magnetosonic imaging system belongs to forceful electric power magnetic environment, and the magnetoacoustic signals for detecting easily receive electromagnetic interference influence, signal to noise ratio
It is too low.At present, faint magnetoacoustic signals are examined using the ultrasound transducer probe based on piezoelectric effect in magnetosonic imaging system
Survey, such piezoelectricity sonic probe technology maturation, be widely used in other things such as medical supersonic detection and photoacoustic imaging, thermal acoustic imaging
In the system of reason field coupled sound fields imaging.But, magnetosonic imaging it is actually detected in, impact of the electromagnetic interference to piezoelectric probe
It is serious and cannot avoid, have a strong impact on the detection quality of magnetosonic imaging signal.
The content of the invention
Technical problem to be solved in the utility model be to provide one kind can effective suppression electromagnetic interference, ensureing high
The magnetoacoustic signals detection based on F-P cavity fibre-optical acoustic sensor of magnetoacoustic signals detection quality is improved while sensitivity and system is imaged
System.
The technical scheme adopted by this utility model is：A kind of magnetoacoustic signals based on F-P cavity fibre-optical acoustic sensor are detected
And imaging system, include：Pumping signal generating meanss, are connected to the induction coil of pumping signal generating meanss outfan, point
A pair of S, N pole static magnets not being correspondingly arranged above and below the induction coil, between induction coil and N poles static magnet
Magnetostatic field in can carry out the movement of tri- directions of XYZ by one group and the 4 dimension racks that rotate coaxially are provided with test serum,
It is provided with for detecting that test serum is produced under the collective effect of magnetostatic field and pulsed magnetic field in the side of the test serum
Magnetoacoustic signals weak acoustic signal detection and the outfan connection of demodulating equipment, weak acoustic signal detection and demodulating equipment
Data acquisition and processing meanss.
Described pumping signal generating meanss are included pulse signal generator and are exported with the pulse signal generator
The power amplifier that end is connected, the outfan of the power amplifier connect the induction coil.
4 described dimension racks are by the three-dimensional trim holder above the static magnet of N poles and are arranged on the three-dimensional adjustment
The turntable for being used for placing above frame test serum is constituted.
Described weak acoustic signal detection and demodulating equipment are included for receiving test serum in magnetostatic field and pulsed magnetic field
Collective effect under the F-P cavity type optical fiber sound sensor probe of magnetoacoustic signals that produces, the F-P cavity type optical fiber sound sensor probe leads to
Y-type optical fiber connection bonder is crossed, the light input end of the bonder connects CW LASER Light Sources, the bonder by incident optical
Light output end photodetector is connected by the output optical fiber, the output of the photodetector is sequentially connected I-U modular converters
And amplification module, the outfan connection data acquisition of the amplification module and the signal input part of processing meanss.
Described F-P cavity type optical fiber sound sensor probe includes what is set gradually：Double fiber optic collimators of connection y-type optical fiber
Device, glass back plate, first medium coating, second medium coating harmony vibrating diaphragm, wherein described first medium coating and second
Setpoint distance d is separated between dielectric coated and constitutes F-P cavity.
Described weak acoustic signal detection and demodulating equipment are included for receiving test serum in magnetostatic field and pulsed magnetic field
Collective effect under the F-P cavity type optical fiber sound sensor probe of magnetoacoustic signals that produces, the F-P cavity type optical fiber sound sensor probe leads to
The y-type optical fiber connection bonder of respective amount is crossed, the light input end of the bonder passes sequentially through wavelength division multiplexer and incident illumination
Fine connection CW LASER Light Sources, the light output end of the bonder is by being connected photoelectricity with y-type optical fiber quantity identical the output optical fiber
Detector, the output of the photodetector are sequentially connected I-U modular converters and amplification module, the outfan of the amplification module
Connect the signal input part of the data acquisition and processing meanss.
Described F-P cavity type optical fiber sound sensor probe includes three and is arranged side by side and the double fiber optic collimators of structure identical
Device, one end of each double-fiber collimator respectively connect the bonder by a y-type optical fiber respectively, and three are arranged side by side
The other end of double-fiber collimator connects the upper surface of glass back plate jointly, and the lower surface of the glass back plate scribbles first medium
Coating, the lower surface for scribbling the glass back plate of first medium coating are correspondingly arranged on sonic vibration film, the sonic vibration film correspondence glass
Second medium coating is scribbled on the end face of glass backboard, between described first medium coating and second medium coating between be separated with setting
F-P cavity is constituted apart from d.
Described data acquisition and processing meanss are included for receiving weak acoustic signal detection and the output of demodulating equipment
The computer of the data collecting card and connection data collecting card of signal.
Magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor of the present utility model, in acoustical signal
Receiving portion introduces optical fiber sound sensing technology, and faint magnetoacoustic signals are converted to light intensity using using F-P cavity fibre-optical acoustic sensor
Signal is measured, and re-demodulation is magnetoacoustic signals information, can effectively suppress the electromagnetic interference in magnetoacoustic signals.This utility model can
To realize the immunity in acoustical signal sensing transmitting procedure to electromagnetic interference, and detection sensitivity height, good stability, ensureing Gao Ling
The detection quality of magnetoacoustic signals is improved while sensitivity, and then improves magnetosonic image reconstruction quality.
Description of the drawings
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is the structural representation of weak acoustic signal detection and demodulating equipment first embodiment in this utility model；
Fig. 3 is the structural representation of F-P cavity type optical fiber sound sensor probe first embodiment in this utility model；
Fig. 4 is the structural representation of weak acoustic signal detection and demodulating equipment second embodiment in this utility model；
Fig. 5 is the structural representation of F-P cavity type optical fiber sound sensor probe second embodiment in this utility model.
1：Pumping signal generating meanss 2：Induction coil
3：S poles static magnet 4：N poles static magnet
5：Test serum 6：4 dimension racks
7：Weak acoustic signal is detected and demodulating equipment 8：Data acquisition and processing meanss
11：Pulse signal generator 12：Power amplifier
61：Three-dimensional trim holder 62：Turntable
71：F-P cavity type optical fiber sound sensor probe 72：Y-type optical fiber
73：Bonder 74：Incident optical
75：CW LASER Light Sources 76：The output optical fiber
77：Photodetector 78：I-U modular converters
79：Amplification module 710：Wavelength division multiplexer
711：Double-fiber collimator 712：Glass back plate
713：First medium coating 714：Second medium coating
715：Sonic vibration film
Specific embodiment
The magnetoacoustic signals based on F-P cavity fibre-optical acoustic sensor of the present utility model are detected with reference to embodiment and accompanying drawing
And imaging system is described in detail.
As shown in figure 1, the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor of the present utility model,
Include：Pumping signal generating meanss 1, are connected to the induction coil 2 of 1 outfan of pumping signal generating meanss, correspond to respectively and set
A pair of S, N pole static magnets 3,4 above and below the induction coil 2 are put, between induction coil 2 and N poles static magnet 4
The 4 dimension racks 6 that tri- direction movements of XYZ can be carried out by one group in magnetostatic field and rotated coaxially are provided with test serum 5,
It is provided with for detecting that test serum 5 is produced under the collective effect of magnetostatic field and pulsed magnetic field in the side of the test serum 5
The outfan of the weak acoustic signal detection of raw magnetoacoustic signals and demodulating equipment 7, the weak acoustic signal detection and demodulating equipment 7
Connection data acquisition and processing meanss 8.
In this utility model, static magnet 3,4 can be made up of the Helmholtz coil that a pair include iron core, and DC source is supplied
To the electric current of Helmholtz coil 0-80A, induction coil can produce the up to magnetostatic field of 0.6T.Pumping signal generating meanss 1
In signal generator 11 (AFG3252, Tektronix, USA) produce single sine pulse pumping signal of 1MHz, then Jing power
Amplifier 12 (HSA4101, NF, Japan) amplifies, to encourage induction coil 2.Test serum 5 is placed in magnetostatic field, 4 dimensions are put
Rack 6 drives carries out moving and rotating coaxially for tri- directions of xyz by test serum 5, to by test serum 5 when being easy to imaging
Optional position detected.
Induction coil 2 produces the pulsed magnetic field parallel with magnetostatic field, and conductive test serum 5 is produced under pulsed magnetic field action
Raw inductive loop；Vortex is subject to Lorentz force to produce dither in magnetostatic field, outwardly radiates ultrasonic signal；Comprising to be measured
Detected and demodulated by the weak acoustic signal based on F-P cavity type optical fiber sound sensor probe by organizing the acoustical signal of 5 electrical conductivity information
Device 7 is received, and is re-fed into data collecting card (PXI-5922, NI, USA), carries out average filter, the demodulation of signal via computer
Calculate, further acoustical signal carried out rebuilding and obtain the reconstruction image comprising 5 electrical conductivity information of test serum.
Described pumping signal generating meanss 1 include pulse signal generator 11 and with the pulse signal generator 11
The power amplifier 12 that outfan is connected, the outfan of the power amplifier 12 connect the induction coil 2.
4 described dimension racks 6 are by the three-dimensional trim holder 61 above N poles static magnet 4 and are arranged on the three-dimensional
Adjustment frame 61 is used for placing the turntable 62 of test serum 5 above and constitutes.To realize the fixation of test serum 5 and to be measured group can be driven
Knit 5 translations for carrying out tri- directions of space X YZ and rotational angle is adjusted.
Described data acquisition and processing meanss 8 include for receive weak acoustic signal detection and demodulating equipment 7 it is defeated
Go out the computer 82 of the data collecting card 81 and connection data collecting card 81 of signal.
As shown in Fig. 2 described weak acoustic signal detection and demodulating equipment 7 are included for receiving test serum 5 magnetostatic
The magnetoacoustic signals for producing the F-P cavity type optical fiber sound that magnetoacoustic signals are converted to optical signal under the collective effect of field and pulsed magnetic field
Sensor probe 71, the F-P cavity type optical fiber sound sensor probe 71 connect bonder 73, the bonder 73 by y-type optical fiber 72
Light input end by incident optical 74 be connected as F-P cavity type optical fiber sound sensor probe 71 provide light source CW LASER Light Sources 75,
The light output end of the bonder 73 is connected to realize the photodetection of the detection with demodulation of optical signal by the output optical fiber 76
Device 77, the output of the photodetector 77 are sequentially connected I-U modular converters 78 and amplification module 79, the amplification module 79
Outfan connects the signal input part of the data acquisition and processing meanss 8.
As shown in figure 3, described F-P cavity type optical fiber sound sensor probe 71 includes what is set gradually：Connection y-type optical fiber 72
Double-fiber collimator 711, glass back plate 712, first medium coating 713, second medium coating 714 and by polyvinylidene fluoride
(PVDF) the sonic vibration film 715 that thin film is constituted, wherein between described first medium coating 713 and second medium coating 714
It is separated with setpoint distance d and constitutes F-P cavity, wherein d is long for the chamber of F-P cavity.Double-fiber collimator 711 can will be Jing y-type optical fibers 72 incident
Gaussian beam collimation for collimated light beam, Jing glass back plates 712 are transmitted to F-P interference cavities, interfere intracavity to be carried on the back due to glass in F-P
High reflectance coating is coated with the inside of 712 harmony vibrating diaphragm 715 of plate, it is possible to achieve the multiple reflections of light and transmission.Sonic vibration film
715 can occur microvibration with the change of acoustic pressure, cause the minor variations of F-P interference cavities chamber length, and then cause phase place to become
Change, phase place change is amplified by multiple-beam interference effect and is converted into interference light intensity to detect, that is, complete acoustical signal and believe to light
Number conversion.
Fig. 4 is given based on F-P cavity type optical fiber sound sensor probe in the weak acoustic signal detection in Fig. 1 and demodulating equipment
Array is realized, it is possible to achieve the array detection of magnetoacoustic signals, you can to realize detecting while multiple spot acoustical signal, with three
As a example by the array of test point, in Fig. 5, source beam is divided into three beamlets through Wavelength division multiplexing module, and each light beam is passed through again
Collimation, it is incident, there is multiple-beam interference into F-P cavity, then each receive the interference information of position respectively, can so realize sound
The array detection of pressure signal.
As shown in figure 4, by taking the array of three test points as an example, described weak acoustic signal detection and demodulating equipment 7 may be used also
To be：Including for receiving the F-P cavity of the magnetoacoustic signals that test serum 5 is produced under the collective effect of magnetostatic field and pulsed magnetic field
Type optical fiber sound sensor probe 71, the F-P cavity type optical fiber sound sensor probe 71 connect bonder by corresponding y-type optical fiber 72
73, the light input end of the bonder 73 passes sequentially through wavelength division multiplexer 710 and the connection CW of incident optical 74 LASER Light Sources 75, institute
The light output end of bonder 73 is stated by being connected photodetector 77 with 72 quantity identical the output optical fiber 76 of y-type optical fiber, it is described
The output of photodetector 77 is sequentially connected I-U modular converters 78 and amplification module 79, and the outfan of the amplification module 79 connects
Connect the signal input part of the data acquisition and processing meanss 8.
Described F-P cavity type optical fiber sound sensor probe can be realized with array, as shown in figure 5, with the battle array of three test points
Example is classified as, described F-P cavity type optical fiber sound sensor probe 71 includes three and is arranged side by side and the double fiber optic collimators of structure identical
Device 711, one end of each double-fiber collimator 711 respectively connect the bonder 73 by a y-type optical fiber 72 respectively, three
The other end of the double-fiber collimator 711 being arranged side by side connects the upper surface of glass back plate 712, the glass back plate 712 jointly
Lower surface scribble first medium coating 713, the lower surface for scribbling the glass back plate 712 of first medium coating 713 is correspondingly arranged
Sound vibrating diaphragm 715, scribbles second medium coating 714 on the end face of the correspondence of sonic vibration film 715 glass back plate 712, described
First medium coating 713 and second medium coating 714 between be separated with setpoint distance d and constitute F-P cavity, wherein d is for F-P cavity
Chamber is long.
Source beam is divided into several beamlets through wavelength division multiplexer, and each light beam is again through bonder 73, y-type optical fiber
72nd, double-fiber collimator 711, glass back plate 712 enter F-P cavity generation multiple-beam interference, then each receive the dry of position respectively
Information is related to, the array detection of sound pressure signal can be so realized.
Described CW LASER Light Sources 75 can adopt stable state (Continue Waves, CW) type semiconductor laser
(LTC100+LPS-660-FC, Thorlabs, USA), provides reliable and stable monochromatic coherent light source for sensor probe, and wavelength X=
660nm.The shoot laser Jing incident opticals 74, bonder 73 of semiconductor laser and coaxial Y types y-type optical fiber 72 are transmitted to F-P
The F-P cavity of lumen type optical fiber sound sensor probe 71, coaxial Y types y-type optical fiber 72 receive Jing F-P cavity type optical fiber sound sensor probe 71 simultaneously
Interference light Jing bonder 73 and the output optical fiber 76 after repeatedly interfering is transmitted to photodetector 77.
Incident optical 74 and the output optical fiber 76 select identical single-mode fiber, Jing bonders to be coupled to y-type optical fiber 72, enter
Penetrate laser Jing y-type optical fibers 72 to transmit to F-P cavity type optical fiber sound sensor probe 71, the output optical fiber of y-type optical fiber 2 receives Jing F- simultaneously
Interference light after P chambers are repeatedly interfered is directly transferred to photodetector.
The photodetector 77 can select highly sensitive photomultiplier tube (Photomultiplier Tube, PMT)
Such as model R928, the photomultiplier tube of Hamamatsu, Japan, realize that the detection to interference light intensity signal is received.Or choosing
With photodiode (Avalanche Photodiode, APD) such as model PDA36A of high-gain, the light of Thorlabs, USA
Electric diode is realizing receiving the detection of interference light intensity signal.The signal Jing I-U modular converters 78 that photodetector 77 is obtained
And follow-up amplification module 79 is delivered to capture card 81 and carries out data acquisition, then obtain needing detection via 82 demodulation process of computer
Acoustic intelligence.
The sensitivity of F-P cavity type optical fiber sound sensor probe 71 mainly has two factors to determine that one is 715 displacement of sonic vibration film
△ d are with the variation coefficient of extraneous acoustic pressure variable △ P for amount, are designated asBy the area of sonic vibration film, thickness and this stature
The property of material determines that this utility model is from polyvinylidene fluoride (PVDF) material as sonic vibration film 715, k1Big and vibration frequency
Bandwidth；Two be interference light intensity with the variable quantity △ I of sonic vibration film offset variable △ d, be designated asAccording to F-P cavity light more
Beam interferometer principle, reflective light intensity are represented by：
In formula, λ is optical source wavelength, and R is dielectric coated reflection coefficient, and n is F-P cavity refractive index, and d is that F-P cavity chamber is long, I0For
Light intensity of incident light.
In engineering, in the case where R is little, formula (1) can be reduced to：
IR=2RI0[1-cos(4πnd/λ)] (2)
To the d derivations in formula (2), it is possible to obtain sensitivity k2, i.e.,：
In this utility model, it is air dielectric in F-P cavity, n=1, dielectric coated reflection R=95%.Formula (3) although
It is periodic function, but because magnetoacoustic signals acoustic pressure very little, the variable quantity △ d of chamber length can be limited in [0, λ/2], such IRAs
The monotonic function of L.If long d=(N+1) λ/4=165 (N+1) in former chamber, now sin (4 π nd/ λ)=1, it is possible to obtain sensitivity k2
Maximum.
Demodulating process, reflective light intensity information I for exactly being detected by photodetectorRSound pressure information P is solved, is passed through
Sensing process understands：
IR=I0+k1k2△d (4)
In formula (4), I0With sensitivity k1k2, it is known that the reflective light intensity I that can be obtained by detectorRSolve magnetosonic
The sound pressure information of signal.
During measurement, the light intensity signal that photodetector be measured can be obtained according to the signal of telecommunication that collects, further according to formula (4) and
k1Definition solves sound pressure signal.
71 compact of F-P cavity type optical fiber sound sensor probe of the present utility model, simple structure are suitable for array reality
It is existing.The sound pressure signal of multiple measurement points is detected in magnetosonic imaging simultaneously can, effectively to reduce the detecting location in scanning process
Position error, while greatly improving measurement efficiency.
Magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor of the present utility model, is carrying out magnetosonic
During signal detection, it is first turned on producing the laser power supply of CW LASER Light Sources, preheats more than half an hour, treat laser instrument output light
After power stability, then other equipment is opened successively, carry out magnetoacoustic signals detection, it is steady to ensure the work of optical fiber sound sensing device
It is fixed, and then ensure the stability of magnetoacoustic signals detection.
Claims (8)
1. a kind of magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor, it is characterised in that include：Swash
Signal generation apparatus (1) are encouraged, the induction coil (2) of pumping signal generating meanss (1) outfan is connected to, is correspondingly arranged at respectively
A pair of S, N pole static magnets (3,4) above and below the induction coil (2), induction coil (2) and N poles static magnet (4) it
Between magnetostatic field in can carry out the movement of tri- directions of XYZ by one group and 4 dimensions rack (6) that rotate coaxially be provided with it is to be measured
Tissue (5), is provided with for detecting test serum (5) in magnetostatic field and pulsed magnetic field in the side of the test serum (5)
The weak acoustic signal detection of the magnetoacoustic signals produced under collective effect and demodulating equipment (7), the weak acoustic signal detection and solution
Adjust outfan connection data acquisition and the processing meanss (8) of device (7).
2. the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor according to claim 1, its feature
Be, described pumping signal generating meanss (1) include pulse signal generator (11) and with the pulse signal generator
(11) power amplifier (12) that outfan is connected, the outfan of the power amplifier (12) connect the induction coil (2).
3. the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor according to claim 1, its feature
It is that described 4 dimension rack (6) is by positioned at N poles static magnet (4) three-dimensional trim holder (61) above and being arranged on described three
Dimension adjustment frame (61) is used for placing the turntable (62) of test serum (5) above and constitutes.
4. the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor according to claim 1, its feature
It is that described weak acoustic signal detection and demodulating equipment (7) are included for receiving test serum (5) in magnetostatic field and pulsed magnetic
F-P cavity type optical fiber sound sensor probe (71) of the magnetoacoustic signals produced under the collective effect of field, the F-P cavity type optical fiber sound sensing
Probe (71) connects bonder (73) by y-type optical fiber (72), and the light input end of the bonder (73) passes through incident optical
(74) CW LASER Light Sources (75) are connected, the light output end of the bonder (73) connects photodetector by the output optical fiber (76)
(77), the output of the photodetector (77) is sequentially connected I-U modular converters (78) and amplification module (79), the amplification mould
The outfan of block (79) connects the signal input part of the data acquisition and processing meanss (8).
5. the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor according to claim 4, its feature
It is that described F-P cavity type optical fiber sound sensor probe (71) includes what is set gradually：Double optical fiber of connection y-type optical fiber (72)
Collimator (711), glass back plate (712), first medium coating (713), second medium coating (714) harmony vibrating diaphragm (715),
Setpoint distance d is separated between wherein described first medium coating (713) and second medium coating (714) and constitutes F-P cavity.
6. the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor according to claim 1, its feature
It is that described weak acoustic signal detection and demodulating equipment (7) are included for receiving test serum (5) in magnetostatic field and pulsed magnetic
F-P cavity type optical fiber sound sensor probe (71) of the magnetoacoustic signals produced under the collective effect of field, the F-P cavity type optical fiber sound sensing
Probe (71) connects bonder (73) by the y-type optical fiber (72) of respective amount, and the light input end of the bonder (73) is successively
CW LASER Light Sources (75), the light output end of the bonder (73) are connected by wavelength division multiplexer (710) and incident optical (74)
By being connected photodetector (77), the photodetector (77) with y-type optical fiber (72) quantity identical the output optical fiber (76)
Output be sequentially connected I-U modular converters (78) and amplification module (79), the outfan connection of the amplification module (79) is described
Data acquisition and the signal input part of processing meanss (8).
7. the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor according to claim 6, its feature
It is that described F-P cavity type optical fiber sound sensor probe (71) includes three and is arranged side by side and the double fiber optic collimators of structure identical
Device (711), one end of each double-fiber collimator (711) respectively connect the bonder by a y-type optical fiber (72) respectively
(73), the other end of three double-fiber collimators being arranged side by side (711) connects the upper surface of glass back plate (712), institute jointly
The lower surface for stating glass back plate (712) scribbles first medium coating (713), scribbles the glass back plate of first medium coating (713)
(712) lower surface is correspondingly arranged on sonic vibration film (715), the end face of the sonic vibration film (715) correspondence glass back plate (712)
On scribble second medium coating (714), between described first medium coating (713) and second medium coating (714) between be separated with
Setpoint distance d constitutes F-P cavity.
8. the magnetoacoustic signals detection and imaging system based on F-P cavity fibre-optical acoustic sensor according to claim 1, its feature
It is that described data acquisition and processing meanss (8) are included for receiving the defeated of weak acoustic signal detection and demodulating equipment (7)
Go out the data collecting card (81) of signal and the computer (82) of connection data collecting card (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620354954.7U CN206080489U (en) | 2016-04-22 | 2016-04-22 | Magnetosonic signal detection and imaging system based on F P chamber fiber acoustic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620354954.7U CN206080489U (en) | 2016-04-22 | 2016-04-22 | Magnetosonic signal detection and imaging system based on F P chamber fiber acoustic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206080489U true CN206080489U (en) | 2017-04-12 |
Family
ID=58470906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620354954.7U Active - Reinstated CN206080489U (en) | 2016-04-22 | 2016-04-22 | Magnetosonic signal detection and imaging system based on F P chamber fiber acoustic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206080489U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105852814A (en) * | 2016-04-22 | 2016-08-17 | 中国医学科学院生物医学工程研究所 | Magnetic acoustic signal detecting and imaging system based on optical fiber F-P-cavity acoustic sensor |
| CN107121220A (en) * | 2017-05-25 | 2017-09-01 | 杭州电子科技大学 | Optics Fabry-Perot-type cavity air pressure sensing system |
| CN113281402A (en) * | 2021-04-12 | 2021-08-20 | 西安理工大学 | F-P-based generalized magnetoelectric effect measuring probe and measuring method |
| CN114113344A (en) * | 2021-11-11 | 2022-03-01 | 大连理工大学 | Electromagnetic ultrasonic stress measurement system and use method |
-
2016
- 2016-04-22 CN CN201620354954.7U patent/CN206080489U/en active Active - Reinstated
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105852814A (en) * | 2016-04-22 | 2016-08-17 | 中国医学科学院生物医学工程研究所 | Magnetic acoustic signal detecting and imaging system based on optical fiber F-P-cavity acoustic sensor |
| CN107121220A (en) * | 2017-05-25 | 2017-09-01 | 杭州电子科技大学 | Optics Fabry-Perot-type cavity air pressure sensing system |
| CN113281402A (en) * | 2021-04-12 | 2021-08-20 | 西安理工大学 | F-P-based generalized magnetoelectric effect measuring probe and measuring method |
| CN113281402B (en) * | 2021-04-12 | 2024-03-12 | 西安理工大学 | Generalized magnetoelectric effect measuring probe and measuring method based on F-P |
| CN114113344A (en) * | 2021-11-11 | 2022-03-01 | 大连理工大学 | Electromagnetic ultrasonic stress measurement system and use method |
| CN114113344B (en) * | 2021-11-11 | 2023-11-07 | 大连理工大学 | Electromagnetic ultrasonic stress measurement system and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206080489U (en) | Magnetosonic signal detection and imaging system based on F P chamber fiber acoustic sensor | |
| CN102860825B (en) | System and method of magnetosonic impedance imaging based on lorentz force mechanic effect | |
| US6795195B1 (en) | System and method for tomographic imaging of dynamic properties of a scattering medium | |
| Maxwell et al. | Polymer microring resonators for high-frequency ultrasound detection and imaging | |
| JPWO2007034802A1 (en) | Elastic viscosity measuring device | |
| CN105277271B (en) | A kind of the phase-shifted fiber grating sensor measuring system and its application of ultrasonic vibration | |
| EP1221035B1 (en) | System and method for tomographic imaging of dynamic properties of a scattering medium | |
| CN108309298A (en) | A kind of magnetosonic Electrical imaging device based on laser-ultrasound | |
| Pulkkinen et al. | Ultrasound field characterization using synthetic schlieren tomography | |
| CN107174202A (en) | A kind of magnetosonic imaging method and system based on active probe | |
| CN105852814A (en) | Magnetic acoustic signal detecting and imaging system based on optical fiber F-P-cavity acoustic sensor | |
| CN108606777A (en) | Optoacoustic computed tomography system based on adjustable focus type fibre optical sensor | |
| Rebling et al. | Optoacoustic characterization of broadband directivity patterns of capacitive micromachined ultrasonic transducers | |
| CN110260968A (en) | Air ultrasound acoustic pressure recurrence system based on the measurement of sound particle vibration velocity | |
| CN108981898A (en) | It is a kind of to realize the method for micro-cantilever resonant frequency tuning using photo-thermal effect, realizing system and application | |
| CN108760048A (en) | Optical coherence microspectrum imaging detecting device based on acousto-optic tunable filter | |
| CN207832307U (en) | A kind of ultrasonic sound field apparatus for measuring distribution | |
| KR20140001453A (en) | Integrated coherence tomography | |
| CN108375411A (en) | Taper horn focuses the intrinsic interference-type optical fiber grating sonac of coupling | |
| CN1230125C (en) | Focusing supersonic modulation reflection type optical chromatography imaging method and its apparatus | |
| CN208547417U (en) | Dynamic sound pressure detection device | |
| Tadayon et al. | Optical micromachined ultrasound transducers (OMUT)-a new approach for high-frequency transducers | |
| CN213693704U (en) | PZT phase modulator modulation depth measuring system | |
| CN113080871B (en) | Imaging system | |
| CN108896221A (en) | A kind of shockwave signal detection device and method interfered based on Mach-increasing Dare |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20190422 |
|
| RR01 | Reinstatement of patent right | ||
| RR01 | Reinstatement of patent right |
Former decision: termination of patent right due to unpaid annual fee Former decision publication date: 20200522 |