CN107515250A - A kind of sound microscopic imaging device for tooth body - Google Patents
A kind of sound microscopic imaging device for tooth body Download PDFInfo
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- CN107515250A CN107515250A CN201710785358.3A CN201710785358A CN107515250A CN 107515250 A CN107515250 A CN 107515250A CN 201710785358 A CN201710785358 A CN 201710785358A CN 107515250 A CN107515250 A CN 107515250A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
- G01N29/0681—Imaging by acoustic microscopy, e.g. scanning acoustic microscopy
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- Ultra Sonic Daignosis Equipment (AREA)
Abstract
The invention belongs to medical science and technical field of nondestructive testing, is related to a kind of sound microscopic imaging device for tooth body.The sound microscopic imaging device that the present invention is used for tooth body includes：Acoustic lens, acoustic excitation/receiving unit, acoustic intelligence processing unit, acoustic scan mechanism, acoustic scan control unit, acoustics imaging unit, fixed platform.The present invention utilizes acoustic scan mechanism, make acoustic lens to the micro- scanning of tooth body carry out sound, acoustic signals and scan position signal inside the detected tooth body of extract real-time, 2D, 3D sound micro-imaging for tooth body is shown, realize to Tooth surface and its sound micro-imaging of interior tissue, the micro- scanning resolution of sound is up to 10 microns.Experiment shows using result, using the sound microscopic imaging device proposed, can quickly obtain the tissue such as enamel, dentine, dental pulp, cementum and its feature distribution of change inside tooth body, achieve preferable actual acoustic imaging effect.
Description
Technical field
The invention belongs to medical science and technical field of nondestructive testing, is related to a kind of sound microscopic imaging device for tooth body.
Background technology
The change of tissue of tooth is to cause the main contributor of teeth cavity disease, and generally when tissue of tooth, there occurs obvious lesion
When, it is likely to result in the disabler of tooth.At present, clinically, visual instrument or auxiliary are mainly used by the doctor in charge
Micro-X ray CT apparatus etc. carries out the damage of tooth body or dental disease is checked and diagnosed.Its main deficiency is：1) visually inspection
Instrument is looked into, cannot get tissue of tooth internal information, be particularly difficult to the interior change or disease for grasping some early stage tissues of tooth
Information in terms of change, consequently, it is possible to losing optimal odontotherapy opportunity；2) Micro-X ray CT apparatus, to patient irradiation
Infringement is obvious, it is also difficult to obtains the information in terms of the interior change or lesion of early stage tissue of tooth.In order to observe group inside tooth body
Knit, presently mainly select Isolated Tooth sample, the optical viewing instrument after being cut into slices using machinery.Its main deficiency is：1) can only
It was observed that there is tissue and its change of optics gray scale difference in sample surfaces；2) tooth body sample interior tissue of tooth and morning can not be obtained
Information in terms of the interior change or lesion of phase tissue of tooth；3) damage of tooth body sample can be caused in mechanical slicing processes, is entered
And influence actual observation effect, it is also difficult to which the fine damage differentiated in tooth body there is originally, or be cut into slices in machinery
Caused by journey；4) need complicated sample making course, take.
The content of the invention
The purpose of the present invention is to be directed to above-mentioned the deficiencies in the prior art, proposes a kind of sound based in tooth body
Learn the device of information carry out sound micro-imaging.
The present invention technical solution be,
Sound microscopic imaging device for tooth body includes：Acoustic lens, acoustic excitation/receiving unit, acoustic intelligence processing are single
Member, acoustic scan mechanism, acoustic scan control unit, acoustics imaging unit, fixed platform (7), it is characterized in that,
1) acoustic lens
Acoustic lens selects point focusing mode, and its focus selects between 10 microns -50 microns, frequency 50MHz~
Selected between 100MHz, and in the mounting seat of acoustic scan mechanism.
2) acoustic scan mechanism
Acoustic scan mechanism is formed using x, y, z, the axle sweep mechanisms of A tetra-, is driven using micro-step motor, each motion
In the range of micron dimension, acoustic scan mechanism (4) is controlled the least displacement resolution ratio of axle by acoustic scan control unit, makes sound
Learn lens and acoustic scan is carried out to observed tooth body.
3) acoustic excitation/receiving unit
Acoustic excitation/receiving unit is made up of acoustic excitation and acoustic receiver two parts, and wherein acoustic excitation part uses
High-frequency narrow-pulse exciting circuit produces excited by impact pulse of the time domain width in 10ns~80ns scopes, before pulse excited by impact
Along being 3ns~4ns, peak-peak amplitude is in 100V~200V regulations, pulse excitation acoustic lens generation high-frequency narrow-pulse excited by impact
Ultrasonic wave, and traveled to by fluid couplant in observed tooth body, incident high-frequency narrow-pulse ultrasonic wave is formed, this is incident high
Frequency burst pulse ultrasonic wave and observed tooth body phase interaction, form reflection high-frequency narrow-pulse ultrasonic wave, by acoustics in tooth body
Lens receive reflection high-frequency narrow-pulse ultrasonic wave, and are converted to reflection high-frequency narrow-pulse ultrasonic signal by acoustic lens, by sound
The acoustic receiver part learned in excitation/receiving unit is received, and high-frequency narrow-pulse ultrasonic signal is obtained after amplification；Acoustic receiver portion
It is divided into high-frequency narrow-pulse circuit, high-frequency narrow-pulse receiving circuit is by impedance transformation, attenuator, preposition amplification and radio frequency amplifier section
Composition, the gain-adjusted scope of high-frequency narrow-pulse receiving circuit select between 0~60dB, frequency domain bandwidth 200MHz.
4) acoustic intelligence processing unit
Reflection high-frequency narrow-pulse ultrasonic signal after acoustic excitation/receiving unit amplification is entered by acoustic intelligence processing unit
Row processing, obtains the data signal for tissue of tooth sound micro-imaging, acoustic intelligence processing unit is adopted by limited amplitude protection, at a high speed
Collection, storage and I/O interface sections are formed, and the threshold range of limited amplitude protection is in -500mv~+500mv, -2000mv~+2000mv
Selected between -5000mv~+5000mv, sample frequency selects between 1GHz~2GHz, and memory capacity is not less than 1M, uses
PCI or PCIe I/O interface modes, the data signal after acoustic intelligence processing unit (3) processing are carried out by acoustics imaging unit
Tissue of tooth sound micro-imaging.
5) acoustics imaging unit
Acoustics imaging unit is made up of computer and double screen high-resolution TFT display, and the CPU frequency of its Computer is not
Less than the I/O interfaces of 1GHz, internal memory not less than 1M, with PCI or PCIe, the pixel of double screen high-resolution TFT display is differentiated
Rate is not less than 1024 × 768 pixels, support RGB is shown, the reflection high frequency narrow by computer to acoustic intelligence processing unit (3)
Pulse ultrasonic wave signal and acoustic lens (1) positional information from acoustic scan control unit are reconstructed, and carry out tooth body group
The sound micro-imaging knitted.
Acoustic lens uses long-focus point focusing high-frequency wideband burst pulse class acoustic lens, in the acoustic beam diameter of near focal point
Positioned at micron dimension, according to the micro- detection needs of tooth body sound, the size of acoustic lens is in 10~20mm, focus at 25~50 microns
Between select.
The coupled modes of described fluid couplant are moisture film, water column or liquid leaching.
The imaging mode selection plane of described acoustics imaging unit or the sound micro-imaging pattern of section, to being detected tooth
Body carries out 3D sound microscopic image analysis.
The present invention has the advantage that and beneficial effect,
The present invention using tissue of tooth and its change with its acoustic elasticity characteristic, it is proposed that one kind be used for tooth body interior tissue and
The sound microscopic imaging device of its Observation of Defects, utilize what is proposed to be used for tooth body sound microscopic imaging device, can be to tooth body sample
The micro- scanning of quick sound is carried out, obtains reflecting tissue of tooth surface and its acoustic picture of Internal biological institutional framework and defect,
A kind of environmentally friendly visualization means are provided to study the diagnosis of the interior change or lesion of tissue of tooth, so as to be advantageous to
The information in terms of the interior change or lesion of some early stage tissues of tooth is grasped in time, when formulating optimal odontotherapy in time
Machine；For Isolated Tooth, can be used for observing Tooth surface and its change of Internal biological tissue or the information of lesion etc., and
There is no any biological damage to observed tooth body sample, any infringement damage will not be also caused to tooth body sample, it is special without carrying out
The tooth system sample of door, it is time saving, quick and easy.Using the present invention, can be used for quickly and easily realizing to Tooth surface, tooth body
The acoustic imaging of interior tissue and its change and tooth volume defect is analyzed, while also the diagnosis for clinical dental disease and inspection provide
A kind of visible means of quick environmental protection.
The present invention proposes a kind of a kind of sound for tooth body based on elastic response behavior of the tooth body to incident acoustic wave and shown
Micro- imaging device, acoustic elements are driven using special acoustic scan unit, it is carried out grid to detected tooth body sample
Scanning, the acoustic signals and position signalling inside tooth body that extract real-time is detected, using signal processing method, by obtaining
Acoustic signals and position signalling carry out position reconstruct and imaging display, realize micro- to the sound of Tooth surface and its interior tissue
Imaging.Using the present invention, it can be used for Tooth surface, tooth body interior tissue and its change and tooth volume defect fast and easily
Sound micro-imaging.
The present invention utilizes high-resolution pulse sound wave and observed tooth body phase interaction, caused acoustic information and tooth body
The mathematics contact at internal different tissues position, acoustic lens is driven by designing special acoustic scan unit, is allowed to tested
The tooth body sample of survey carries out raster pattern acoustic scan, using information processing method, the acoustics of each scan position point of extract real-time
Information and positional information, it is reconstructed by the acoustic information and corresponding positional information that are received to acoustic lens, realization pair
The sound micro-imaging of Tooth surface and its interior tissue, and then Tooth surface and tooth body interior tissue and tissue of tooth can be become
Change or tooth volume defect carries out quick sound microscopic image analysis, for the clinical research of dental disease and tooth body early stage tissue change, examine
Disconnected, dental prophylaxis etc. provides a kind of acoustic imaging apparatus of quick environmental protection.
The present invention utilizes acoustic scan mechanism, acoustic lens is detected the micro- scanning of tooth body carry out sound, extract real-time
Tooth body inside acoustic signals and scan position signal, 2D, 3D sound micro-imaging for tooth body are shown, are realized to tooth body surface
Face and its sound micro-imaging of interior tissue, the micro- scanning resolution of sound is up to 10 microns.Experiment shows using result, using institute
The sound microscopic imaging device of proposition, it can quickly obtain the tissue such as enamel, dentine, dental pulp, cementum inside tooth body and its become
The feature distribution of change, achieve preferable actual acoustic imaging effect.
Brief description of the drawings
Fig. 1 is the tooth body sound microscopic imaging device principle schematic of the present invention；
Fig. 2 is the tooth body sound microscopic imaging device three dimensional structure diagram of the present invention.
Embodiment
1. for the sound microscopic imaging device of tooth body, including：Acoustic lens 1, acoustic excitation/receiving unit 2, at acoustic intelligence
Unit 3, acoustic scan mechanism 4, acoustic scan control unit 5, acoustics imaging unit 6, fixed platform 7 are managed, as shown in figure 1,
1) acoustic lens 1
Acoustic lens 1 selects point focusing mode, and its focus selects between 10 microns~50 microns, frequency 50MHz~
Selected between 100MHz, and in the mounting seat of acoustic scan mechanism 4.
2) acoustic scan mechanism 4
Acoustic scan mechanism 4 is formed using x, y, z, the axle sweep mechanisms of A tetra-, is driven using micro-step motor, Mei Geyun
In the range of micron dimension, acoustic scan mechanism 4 is controlled the least displacement resolution ratio of moving axis by acoustic scan control unit 5, is made
Acoustic lens 1 carries out acoustic scan to observed tooth body, as shown in Figure 2.
1. the composition of acoustic scan mechanism 4
Acoustic scan mechanism 4 is formed from high-precision micro leading screw+guide rail, is driven using micro-step motor, each
The least displacement resolution ratio of kinematic axis selects in micron dimension scope.Wherein, leading screw+guide rail is pacified by it in x-axis sweep mechanism
Dress seat is fixed on base 4B side, and micro-step motor 4E is fixed on the one of leading screw in x-axis sweep mechanism+guide rail mounting seat
End, micro-step motor 4E kinematic axis are connected with leading screw one end in x-axis sweep mechanism, in vertical beam 4F and x-axis sweep mechanism
Sliding block connection on leading screw+guide rail；Leading screw+guide rail is fixed on base 4G by its mounting seat in y-axis sweep mechanism, base 4G
The upper surface of left end and vertical beam 4F be connected, micro-step motor 4H is fixed on leading screw in y-axis sweep mechanism+guide rail installation
The left end of seat, micro-step motor 4H kinematic axis are connected with the leading screw left end in y-axis sweep mechanism, silk in z-axis sweep mechanism
Thick stick+guide rail is fixed on base 4I by its mounting seat, and base 4I is connected with the sliding block in y-axis sweep mechanism on leading screw+guide rail,
Micro-step motor 4J is fixed on the upper end of leading screw in z-axis sweep mechanism+guide rail mounting seat, micro-step motor 4J kinematic axis
It is connected with the leading screw upper end in z-axis sweep mechanism, connecting seat 4A is connected solid with the sliding block in z-axis sweep mechanism on leading screw+guide rail
Fixed, connecting seat 4A can use the axis connection form shown in Fig. 2 with z-axis, realize the regulation of angle A.Add in base 4B lower section
Work has rectangular recess 4C, and same cable-through hole 4D is machined with the left of rectangular recess 4C, and fixed platform 7 is a small-sized square
Device is described, it is clamped above base 4B, the clamped seat 7A for placing tooth body sample is designed with fixed platform 7.
2. sound microscopic imaging device physical connection
Acoustic lens 1 is arranged on the connecting seat 4A of acoustic scan mechanism 4, and acoustic scan control unit 5 is arranged on acoustics
In the Baltimore groove 4C below base 4B in sweep mechanism 4, acoustic excitation/receiving unit 2 is arranged on vertical beam 4F left side, sound letter
Cease on the computer motherboard that processing unit 3 is arranged in acoustics imaging unit 6, acoustics imaging unit 6 is located on operating desk, is detected
The tooth body sample 8 of survey is placed in clamped seat 7A.
3. sound microscopic imaging device electrical equipment connects
Acoustic lens 1 carries out electrical equipment with the R/T ends of acoustic excitation/receiving unit 2 by high frequency connecting line and is connected, and acoustics swashs
Encourage/output end of receiving unit 2 is connected by high frequency connecting line with the input of acoustic intelligence processing unit 3, acoustic intelligence processing unit 3
It is connected by I/O bus interface modes with the computer motherboard in acoustics imaging unit 6, the control terminal of acoustic scan mechanism 4 passes through
Control line is connected with the control terminal of acoustic scan control unit 5, and the I/O control terminals of acoustic scan control unit 5 are connect by bus
Mouth is connected with the computer motherboard in acoustics imaging unit 6.
4. the sound microscopic imaging device course of work
The distance between acoustic lens 1 and the detected surface of tooth body 8 are adjusted by z-axis, acoustic lens is realized by x, y-axis
1 pair of detected tooth body 8 carries out (x, y) automatically scanning, and the posture and angular adjustment of acoustic lens 1 are realized by A axles, is swashed in acoustics
Encourage/receiving unit 2 in the presence of, 1 real time emission of acoustic lens/reception acoustic signals, wherein：
A) acoustic signals of the transmitting of acoustic lens 1 are provided by acoustic excitation/receiving unit 2, and acoustic lens 1, which receives, to be come
Send acoustic excitation/receiving unit 2 to carry out preposition processing from the acoustic signal in tooth body 8, carried out through acoustic excitation/receiving unit 2
Acoustic signals after preposition processing send acoustic intelligence processing unit 3 to be digitized processing, are digitized by acoustic intelligence processing unit 3
Detection signal after conversion is sent to the calculator memory in acoustics imaging unit 6 by I/O interfaces, for sound micro-imaging；
B) acoustic lens 1 by acoustic scan mechanism 4 under the control of acoustic scan control unit 5, to observed
Tooth body carries out acoustic scan, and the EBI of scan position coordinate acoustic scan control unit 5 is sent in acoustics imaging unit 6
Calculator memory, for sound micro-imaging position.
3) acoustic excitation/receiving unit 2
Acoustic excitation/receiving unit 2 is made up of acoustic excitation and acoustic receiver two parts, and wherein acoustic excitation part uses
High-frequency narrow-pulse exciting circuit produces excited by impact pulse of the time domain width in 10ns~80ns scopes, before pulse excited by impact
Along being 3ns~4ns, peak-peak amplitude is in 100V~200V regulations, the generation of pulse excitation acoustic lens 1 high frequency narrow arteries and veins excited by impact
Ultrasonic wave is rushed, and is traveled to by fluid couplant in observed tooth body, forms incident high-frequency narrow-pulse ultrasonic wave, this is incident
High-frequency narrow-pulse ultrasonic wave and observed tooth body phase interaction, form reflection high-frequency narrow-pulse ultrasonic wave, by sound in tooth body
Learn lens 1 and receive reflection high-frequency narrow-pulse ultrasonic wave, and reflection high-frequency narrow-pulse ultrasonic signal is converted to by acoustic lens 1,
Received by the acoustic receiver part in acoustic excitation/receiving unit 2, high-frequency narrow-pulse ultrasonic signal is obtained after amplification；Acoustics
Receiving portion is high-frequency narrow-pulse circuit, and high-frequency narrow-pulse receiving circuit is put by impedance transformation, attenuator, preposition amplification and radio frequency
Most of composition, the gain-adjusted scope of high-frequency narrow-pulse receiving circuit select between 0~60dB, and frequency domain bandwidth is
200MHz。
4) acoustic intelligence processing unit 3
Reflection high-frequency narrow-pulse ultrasonic signal after the amplification of acoustic excitation/receiving unit 2 is by acoustic intelligence processing unit 3
Handled, obtain the data signal for tissue of tooth sound micro-imaging, acoustic intelligence processing unit 3 is by limited amplitude protection, high speed
Collection, storage and I/O interface sections are formed, the threshold range of limited amplitude protection -500mv~+500mv, -2000mv~+
Selected between 2000mv and -5000mv~+5000mv, sample frequency selects between 1GHz~2GHz, and memory capacity is not less than
1M, using PCI or PCIe I/O interface modes, the data signal after the processing of acoustic intelligence processing unit 3 is by acoustics imaging unit
6 carry out tissue of tooth sound micro-imaging.
5) acoustics imaging unit 6
Acoustics imaging unit 6 is made up of computer and double screen high-resolution TFT display, the CPU frequency of its Computer
Not less than the I/O interfaces of 1GHz, internal memory not less than 1M, with PCI or PCIe, the pixel point of double screen high-resolution TFT display
Resolution is shown not less than 1024 × 768 pixels, support RGB, by reflection high frequency narrow of the computer to acoustic intelligence processing unit 3
Pulse ultrasonic wave signal and the positional information of acoustic lens 1 from acoustic scan control unit 5 are reconstructed, and carry out tissue of tooth
Sound micro-imaging.
Acoustic lens 1 uses long-focus point focusing high-frequency wideband burst pulse class acoustic lens, straight in the acoustic beam of near focal point
Footpath is located at micron dimension, micro- in 25-50 in 10-20mm, focus according to the micro- detection needs of tooth body sound, the size of acoustic lens 1
Selected between rice.
The coupled modes of described fluid couplant are moisture film, water column or liquid leaching.
The imaging mode selection plane of described acoustics imaging unit 6 or the sound micro-imaging pattern of section, to being detected
Tooth body 8 carries out 3D sound microscopic image analysis.
Embodiment
X, y, z, the axle sweep mechanisms of A tetra- from composite Co., Ltd of Air China, using micro-stepping motors and its control
Unit as acoustic scan control unit, from composite Co., Ltd of Air China high frequency ultrasound unit as acoustic excitation/
Receiving unit, select 50MHz and 100MHz acoustic lens, using 1GMz and 2GHz data collecting system as acoustic intelligence at
Manage unit, using 1.5GHz dominant frequency, 512M internal memories computer as acoustics imaging host unit, construct tooth according to the present invention
Body sound microscopic imaging device, the acoustic lens of 25 microns and 50 microns focuses is selected, it is right respectively using flat scanning and profile scanning
Actual sound micro-imaging analysis of experiments and the application of series are carried out from the actual tooth sample of different clinical human bodies, using result
Show, using constructed tooth body sound microscopic imaging device, can quickly obtain enamel, dentine, dental pulp, dentale inside tooth body
Matter etc. is organized and its feature distribution of change, preferably realizes the sound microscopic image analysis to tooth body.
Claims (5)
1. a kind of sound microscopic imaging device for tooth body, including：Acoustic lens (1), acoustic excitation/receiving unit (2), sound letter
Cease processing unit (3), acoustic scan mechanism (4), acoustic scan control unit (5), acoustics imaging unit (6), fixed platform
(7), it is characterized in that,
1) acoustic lens (1)
Acoustic lens (1) selects point focusing mode, and its focus selects between 10 microns -50 microns, frequency 50MHz~
Selected between 100MHz, and in the mounting seat of acoustic scan mechanism (4).
2) acoustic scan mechanism (4)
Acoustic scan mechanism (4) is formed using x, y, z, the axle miniscanning mechanisms of A tetra-, is driven using micro-step motor, each
The least displacement resolution ratio of kinematic axis in the range of micron dimension, by acoustic scan control unit (5) controlled by acoustic scan mechanism (4)
System, acoustic lens (1) is set to carry out acoustic scan to observed tooth body.
3) acoustic excitation/receiving unit (2)
Acoustic excitation/receiving unit (2) is made up of acoustic excitation and acoustic receiver two parts, and wherein acoustic excitation part is using high
Frequency burst pulse exciting circuit produces time domain width in the pulse excited by impact of 10ns~80ns scopes, the forward position of pulse excited by impact
For 3ns~4ns, peak-peak amplitude is adjusted in 100V~200V, and pulse excitation acoustic lens (1) excited by impact produces high frequency narrow arteries and veins
Ultrasonic wave is rushed, and is traveled to by fluid couplant in observed tooth body, forms incident high-frequency narrow-pulse ultrasonic wave, this is incident
High-frequency narrow-pulse ultrasonic wave and observed tooth body phase interaction, form reflection high-frequency narrow-pulse ultrasonic wave, by sound in tooth body
Learn lens (1) and receive reflection high-frequency narrow-pulse ultrasonic wave, and reflection high-frequency narrow-pulse ultrasonic wave letter is converted to by acoustic lens (1)
Number, received by the acoustic receiver part in acoustic excitation/receiving unit (2), high-frequency narrow-pulse ultrasonic signal is obtained after amplification；
Acoustic receiver part is high-frequency narrow-pulse circuit, and high-frequency narrow-pulse receiving circuit is by impedance transformation, attenuator, preposition amplification and penetrates
Frequency amplifier section forms, and the gain-adjusted scope of high-frequency narrow-pulse receiving circuit selects between 0~60dB, and frequency domain bandwidth is
200MHz。
4) acoustic intelligence processing unit (3)
Reflection high-frequency narrow-pulse ultrasonic signal after acoustic excitation/receiving unit (2) amplification is by acoustic intelligence processing unit (3)
Handled, obtain the data signal for tissue of tooth sound micro-imaging, acoustic intelligence processing unit (3) is by limited amplitude protection, height
Speed collection, storage and I/O interface sections are formed, the threshold range of limited amplitude protection -500mV~+500mV, -2000mV~+
Selected between 2000mV and -5000mV~+5000mV, sample frequency selects between 1GHz~2GHz, and memory capacity is not less than
1M, using PCI or PCIe I/O interface modes, the data signal after acoustic intelligence processing unit (3) processing is by acoustics imaging list
First (6) carry out tissue of tooth sound micro-imaging.
5) acoustics imaging unit (6)
Acoustics imaging unit (6) is made up of computer and double screen high-resolution TFT display, and the CPU frequency of its Computer is not
Less than the I/O interfaces of 1GHz, internal memory not less than 1M, with PCI or PCIe, the pixel of double screen high-resolution TFT display is differentiated
Rate is not less than 1024 × 768 pixels, support RGB is shown, the reflection high frequency narrow by computer to acoustic intelligence processing unit (3)
Pulse ultrasonic wave signal and acoustic lens (1) positional information from acoustic scan control unit (5) are reconstructed, and carry out tooth body
The sound micro-imaging of tissue.
2. a kind of sound microscopic imaging device for tooth body according to right 1, it is characterized in that, described acoustic lens (1)
Using long-focus point focusing high-frequency wideband burst pulse class acoustic lens, it is located at micron dimension, root in the acoustic beam diameter of near focal point
Needed according to the micro- detection of tooth body sound, the size of acoustic lens (1) selects in 10-20mm, focus between 25-50 microns.
3. a kind of sound microscopic imaging device for tooth body according to right 1, it is characterized in that, described fluid couplant
Coupled modes are moisture film, water column or liquid leaching.
4. acoustic excitation/receiving unit in a kind of sound microscopic imaging device for tooth body according to right 1, its feature
It is the imaging mode selection plane of described acoustics imaging unit (6) or the sound micro-imaging pattern of section, to being detected tooth body
(8) 3D sound microscopic image analysis is carried out.
5. the acoustic scan mechanism (4) in a kind of sound microscopic imaging device for tooth body according to right 1, its feature
It is, for the complex tooth body sample of surface configuration, acoustic lens to be adjusted using x, y, z, the axle miniscanning mechanism of A, C five
(1) posture and position.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109374738A (en) * | 2018-09-05 | 2019-02-22 | 广州联声电子科技有限公司 | A kind of ultrasonic microscope and method based on annular array |
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