CN105606210A - Ultrasonic sensor array based on liquid lenses - Google Patents
Ultrasonic sensor array based on liquid lenses Download PDFInfo
- Publication number
- CN105606210A CN105606210A CN201610180083.6A CN201610180083A CN105606210A CN 105606210 A CN105606210 A CN 105606210A CN 201610180083 A CN201610180083 A CN 201610180083A CN 105606210 A CN105606210 A CN 105606210A
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- liquid lens
- ultrasonic
- sensor array
- ultrasonic sensor
- probe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention discloses an ultrasonic sensor array based on liquid lenses, which can be applied to detection of ultrasonic signals in opto-acoustic, microwave thermo-acoustic and ultrasonic imaging systems and the like. The ultrasonic sensor array is simple in manufacturing, low in cost and very suitable for batch production. The ultrasonic sensor of a single liquid lens in the ultrasonic sensor array of liquid lenses is composed of a liquid lens and an ultrasonic sensing unit, the arc surface of the liquid lens is adjusted by controlling the volume of liquid in the cavity of the liquid lens, and then the purpose of focusing or beam expansion of an ultrasonic probe is fulfilled. Compared with the traditional ultrasonic sensors, the ultrasonic sensors have the advantage that the focusing and beam expanding performance of the ultrasonic probes can be adjusted in real time during working, so that the system achieves the optimal working effect. The ultrasonic sensor array can be made into an annular or spherical array or the like according to actual application needs, and meanwhile, is low in machining cost and very suitable for industrialization.
Description
Technical field
The invention belongs to acquisition of signal field, specifically, relate to a kind of ultrasonic sensor array based on liquid lens.
Background technology
Ultrasonic sensor is a kind of application acquisition of signal device very widely, and it can be used for ultrasonic transmitting and receiving in ultrasonic imaging, also can be used in photoacoustic imaging and thermal acoustic imaging field for the detection to high-frequency ultrasonic signal. Ultrasonic sensor can be divided into two kinds of piezoelectric-type ultrasonic sensor and condenser type sonacs technological means. Piezoelectric-type ultrasonic sensor is to utilize the piezoelectric property of the piezoelectric in sensor that ultrasonic signal is converted to the signal of telecommunication. General piezoelectric mainly contains piezoelectric ceramics, PVDF, piezoelectric membrane etc., and the size of piezoelectric piezoelectric modulus has determined the sensitivity of sonac. Condenser type sonac is to utilize the vibration variation of device capacitor value under ul-trasonic irradiation that acoustical signal is converted to the signal of telecommunication. But at present more general and ripe in the application of medical imaging field piezoelectric-type ultrasonic sensor, these sonacs have dividing of non-focusing and focusing probe; Non-focusing probe has certain aperture value, can the ultrasonic signal in certain area be surveyed or be launched, and focusing probe focuses on ultrasonic wave by adding the methods such as ultrasonic lens at probe front end, ultrasonic signal on can focusing is surveyed, or the ultrasonic wave of transmitting can focus in focal position.
No matter be focusing probe or non-focusing probe, once its performance parameter is also all relatively fixing as the parameter such as focal length, angular aperture after machining, therefore the application of same probe is subject to its preset parameter affect and be relatively restricted. On market, there is focusing probe to reach the object to probe performance parameter conversion by can load the ultrasonic lens of replacing in its Front-end Design, and then realize same probe and can be applied in more field. But this regular replacing is as easy as rolling off a log, probe is caused to damage, reduce the service life of probe; Meanwhile, for detector array, also very loaded down with trivial details of this replacing, has increased the complexity that detection system is used.
Summary of the invention
The object of the present invention is to provide a kind of sensor array based on liquid lens technology, solved the shortcoming that the parameter that existing sensor technology exists is fixed, can not flexible modulation. The present invention can be fast and effeciently receives and emitting performance regulate sonac, and improve ultrasonic imaging on this basis, the imaging performance of the system such as photoacoustic imaging, thermal acoustic imaging; Ultrasonic sensor array is by the Front-end Design liquid lens at each sensing unit, and the cambered surface of lens is regulated to its body cavity injecting fluid by syringe pump, reach with this object that angular aperture to supersonic array detector or focusing performance are optimized, just the angular aperture to ultrasonic array probe or focal spot regulate control neatly not need to change sonde configuration.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of ultrasonic sensor array based on liquid lens, comprise the array bracket of more than one liquid lens sonac and fixing liquid lens sonac, each described liquid lens sonac comprises liquid lens, ultrasonic sensing unit, a liquid lens correspondence a ultrasonic sensing unit, and liquid lens is connected with the ultrasonic probe of ultrasonic sensing unit; Described liquid lens comprises the cavity being formed by bottom, sidewall and the cambered surface being formed by the film that is bonded in sidewall opening place, and is provided with needle tubing by cavity and importing/tapping after outside connection. Make the cambered surface of liquid lens produce deformation by importing/tapping and realize the function that ultrasonic wave is focused on or expanded, then by ultrasonic sensing unit reception ultrasonic wave or to external emission ultrasonic wave. When import sufficient liquid in liquid lens cavity time, the angular aperture of film meeting projection and then raising ultrasonic probe, increases single ultrasonic probe to hyperacoustic investigative range; Have in limited time when import liquid in lens cavity, film can cave in and then can produce focusing effect to ultrasonic probe, forms focused ultrasonic sensor array.
Particularly, the outside connection of bottom of described ultrasonic probe and liquid lens, ultrasonic probe is for receiving or transmitting ultrasonic signal, and acoustical signal is converted to the signal of telecommunication or converts electrical signals to ultrasonic signal, and the size of liquid lens cavity bottom is consistent with the search coverage size of ultrasonic probe.
As preferably, the thickness of described film is 10 μ m-500 μ m.
Further, described liquid lens adopts polymeric material to form, and is specially dimethyl silicone polymer, and this dimethyl silicone polymer adopts elastomer silicone base and curing agent to form according to the ratio mixing manufacture of 10:1.
Further, described ultrasonic probe is the senser element of detecting ultrasonic ripple signal, is the ultrasonic sensing probe of piezoelectric type, or capacitive ultrasonic sensing probe.
In order to ensure effective transmission of ultrasonic signal, the ultrasonic probe of described ultrasonic sensing unit is connected with liquid lens by ultrasonic coupling agent realizes sealing contact.
Again further, on each described liquid lens sidewall, two needle tubings are set, a needle tubing is connected with syringe pump by flexible pipe, and another root needle tubing is connected with liquids recovery container by flexible pipe. Syringe pump is used for liquid volume in the cavity of liquid lens to control, and then reaches the object that the cambered surface of liquid lens is regulated; Flexible pipe is for importing to needle tubing by the liquid in syringe pump or the liquid in needle tubing being exported in liquids recovery container.
As preferably, the exit of described liquids recovery container arranges valve. For liquid is carried and is controlled.
In addition, described array bracket comprises more than one support, the circular hole slot that each support comprises groove and is communicated with bottom portion of groove, and this groove is for fixing liquid lens, and circular hole slot is for fixing ultrasonic sensing unit. Described array is that line style is annular or spherical, and in the time being line style, the end of each support and the end of another support connect to form the array bracket of line style; When being when annular, institute's standoff both ends head and the tail connect to form annular array bracket in turn, the center of the opening sensing array bracket of the groove of each support; In the time being spherical, all supports link together and form spherical array bracket, and the opening of the groove of each support all points to the center of ball array support.
Beneficial effect of the present invention is:
The invention provides a kind of ultrasonic sensor array system based on liquid lens technology, this system arranges liquid lens at the front end of each ultrasonic sensing unit, by syringe pump, the control of total amount of liquid in liquid lens cavity is reached the adjusting of the cambered surface to film, and then realize the optimization object to ultrasonic probe parameters,acoustic. The present invention can optimize and improve the angular aperture of ultrasonic probe easily, has increased the investigative range of ultrasonic probe; For focused ultrasonic transducer, the size that the present invention can focal spot carries out effectively optimizing and regulating, and improves the acquisition of signal ability of system. The invention solves the shortcoming that the parameter that existing sensor technology exists is fixed, can not flexible modulation, have huge application prospect in fields such as acquisition of signal, ultrasonic imaging, photoacoustic imaging and thermal acoustic imagings.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of the present invention-embodiment 1.
Fig. 2 is the structural representation that the present invention-embodiment 1 makes the grinding tool of liquid lens.
Fig. 3 is the structural representation after the present invention-embodiment 1 dimethyl silicone polymer solidifies in grinding tool.
Fig. 4 is the structural representation of the present invention-embodiment 1 liquid lens.
Fig. 5 is the structural representation of the present invention-embodiment 1 liquid lens injecting fluid rear arc.
Fig. 6 is the structural representation of the present invention-embodiment 1 liquid lens ultrasonic sensing unit.
Fig. 7 is the top view of the array bracket of the present invention-embodiment 2 four array liquid lens sonacs.
Fig. 8 is the side view of the array bracket of the present invention-embodiment 2 four array liquid lens sonacs.
Fig. 9 is the structural representation of the present invention-embodiment 2 four array liquid lens sonacs.
Wherein, the parts name that in figure, Reference numeral is corresponding is called:
1-liquid lens, 2-ultrasonic probe, 3-liquids recovery container, 4-syringe pump, 5-array bracket, 6-needle tubing, 7-flexible pipe, 8-valve, 9-grinding tool, the circular hole slot of 10-.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described. Embodiments of the present invention include but not limited to the following example.
The invention provides a kind of ultrasonic sensor array system based on liquid lens technology, can, according to system practical application scene, fast and effeciently be optimized adjusting to the parameters,acoustic of ultrasonic sensing unit, make whole system reach best duty. The present invention first by syringe pump to injecting fluid in liquid lens cavity, the injection volume of liquid is determining the arc shape of lens surface thin polymer film, thereby has just changed the acoustic transmission parameter of probe. The present invention can be optimized adjusting to the parameter such as angular aperture, focusing performance of probe for different application scenarios, makes sensor array system reach best working effect.
Embodiment 1
As shown in Figure 1, a kind of ultrasonic sensor array based on liquid lens, comprises line style ultrasonic sensor array, and each array includes liquid lens 1, ultrasonic probe 2, liquids recovery container 3, syringe pump 4, support, needle tubing 6, flexible pipe 7, valve 8, wherein, liquid lens 1 comprise that bottom is connected with bottom surrounding and with the sidewall of the solid one of bottom, between bottom and sidewall, form a cavity with opening, form the cavity of a sealing at opening part bonding film. the front end end of ultrasonic probe 2 is connected with the bottom outside of liquid lens 1, correspondingly, the circular hole slot 10 that support comprises a groove and is communicated with bottom portion of groove, groove is used for placing liquid lens 1, circular hole slot is for passing through ultrasonic probe 2, the end of each support and the end of another support connect to form the array bracket 5 of line style, a needle tubing 6 is set respectively in the symmetric position of liquid lens side, this needle tubing is communicated with the inside and outside of cavity, a needle tubing connects syringe pump 4 by flexible pipe 7, another root needle tubing connects liquid returnable 3 by flexible pipe 7, on support, be provided with the hole through needle tubing 6, in the exit of liquids recovery container 3, valve 8 is set.
The concrete manufacturing process of the each parts of the present embodiment is as follows:
Liquid lens 1 adopts polymeric material dimethyl silicone polymer to make, and concrete preparation method is as follows:
The grinding tool 9 of making liquid lens 1 based on 3D printing technique, the material that grinding tool 9 uses is resin, the grinding tool structure completing is as shown in Figure 2; It is long that the trough body structure of the present embodiment grinding tool is of a size of 20mm() × 15mm(is wide) × 6mm(is dark), the Partial Height of central protuberance is the cavity that 5mm is used to form liquid lens, the difference in height of 1mm is used to form the underlayer thickness of liquid lens.
By elastomer silicone base and curing agent according to the ratio mixing manufacture dimethyl silicone polymer of 10:1; Standing a period of time, after it is degassed, is injected in the groove in Fig. 2, and be heated to 80 DEG C continue 40 minutes; By the time after dimethyl silicone polymer solidifies in grinding tool, as shown in Figure 3.
It is peeled off out from grinding tool, and the dimethyl silicone polymer Thin-film key that is 100 μ m by a layer thickness is incorporated into its aperture position, so just formed the cavity body structure of liquid lens; Finally in the symmetric position of liquid lens side, be fixed with the needle tubing that diameter is 0.5mm, for injecting and discharge liquid to liquid lens cavity, as shown in Figure 4.
Liquid in the present embodiment in liquid lens cavity is the mixture of glycerine (75%) and water (25%), and the density of this mixture is 1.19g/cm3, ultrasonic spread speed is therein 1.78mm/ μ s, and acoustic impedance is 2.11MRay, and in a word, the ultrasonic propagation velocity of liquid that liquid lens uses is larger than extraneous liquid environment ultrasonic propagation velocity; In system, use syringe pump (KDS210, KDScientific) that liquid is injected in liquid lens cavity through flexible pipe and needle tubing; In the process of liquid injection, liquids recovery container valve is opened, be beneficial in input filling liquid the Bas Discharged in cavity; After treating the interior air venting of cavity, needle tubing and flexible pipe, valve closing, input port continues filling liquid, and at this moment the dimethyl silicone polymer film of liquid lens can start to expand because of the increase of the volume of liquid, form the cambered surface of liquid lens, as shown in Figure 5.
The front end that the each liquid lens completing is placed in to the ultrasonic probe of ultrasonic sensing unit forms liquid lens ultrasonic sensing unit, as shown in Figure 6, the cavity of liquid lens and the cross section diameter of ultrasonic probe are 9mm, between liquid lens and ultrasonic probe, be added with ultrasonic coupling agent, ensure sealing contact between the two and effective transmission of ultrasonic signal.
Embodiment 2
A kind of ultrasonic sensor array based on liquid lens, as different from Example 1, the present embodiment is annular ultrasonic sensor array, be specially the sonac of four array liquid lens, make the array bracket of annular ultrasonic sensor array based on 3D printing technique, as Fig. 7, shown in 8, be respectively top view and side view, this array bracket comprises 4 supports, the both ends of each array bracket are joined together to form a square array bracket in turn, the circular hole slot 10 that each support all comprises a groove and is communicated with bottom portion of groove, the opening of groove points to the center of array bracket, circular hole slot 10 is laterally evenly distributed on four limits of array bracket, circular hole slot 10 is for fixing ultrasonic probe.
The present embodiment can be fixed 4 liquid lens ultrasonic sensing unit in Fig. 6, and each liquid lens is provided with same needle tubing in symmetric position, as shown in Figure 9, the needle tubing input of four liquid lens adopts respectively A, B, C, D represents, correspondingly, the syringe pump of the present embodiment and liquids recovery container comprise respectively 4 input/output end ports, four needle tubing inputs connect the flexible pipe of equal lengths (for for purpose of brevity, the figure of clipped flexible pipe in figure) and be connected respectively to a that syringe pump is corresponding, b, c, tetra-input/output end ports of d are for injecting fluid, flexible pipe by equal length of four needle tubing output E, F, G, H is (for for purpose of brevity, the figure of clipped flexible pipe in figure) be connected respectively to tetra-input/output end ports of e, f, g, h that liquids recovery container is corresponding, valve is located near liquids recovery container port, for liquids recovery is controlled.
Liquid lens equal and opposite in direction; The distance that input liquid is walked in flexible pipe equates respectively; The distance that output liquid is walked in flexible pipe equates respectively. Based on above-mentioned 3 points, each liquid lens total distance from input to output also equates, is to have equal pressure and consistent globoidal structure in order to ensure each liquid lens inside.
According to above-described embodiment, just can realize well the present invention. What deserves to be explained is; under prerequisite based on above-mentioned design principle; for solving same technical problem; even if some that make on architecture basics disclosed in this invention are without substantial change or polishing; the essence of the technical scheme adopting is still the same with the present invention, therefore it also should be in protection scope of the present invention.
Claims (10)
1. the ultrasonic sensor array based on liquid lens, it is characterized in that, comprise the array bracket of more than one liquid lens sonac and fixing liquid lens sonac, each described liquid lens sonac comprises liquid lens, ultrasonic sensing unit, and liquid lens is connected with the ultrasonic probe of ultrasonic sensing unit; Described liquid lens comprises the cavity being formed by bottom, sidewall and the cambered surface being formed by the film that is bonded in sidewall opening place, and is provided with needle tubing by cavity and importing/tapping after outside connection.
2. a kind of ultrasonic sensor array based on liquid lens according to claim 1, it is characterized in that, the outside connection of bottom of described ultrasonic probe and liquid lens, and the size of liquid lens cavity bottom is consistent with the search coverage size of ultrasonic probe.
3. a kind of ultrasonic sensor array based on liquid lens according to claim 2, is characterized in that, the thickness of described film is 10 μ m-500 μ m.
4. a kind of ultrasonic sensor array based on liquid lens according to claim 1, is characterized in that, described liquid lens adopts polymeric material to form.
5. a kind of ultrasonic sensor array based on liquid lens according to claim 1, is characterized in that, the ultrasonic sensing probe that the ultrasonic probe of described ultrasonic sensing unit is piezoelectric type, or capacitive ultrasonic sensing probe.
6. a kind of ultrasonic sensor array based on liquid lens according to claim 1, is characterized in that, described ultrasonic probe is connected with liquid lens by ultrasonic coupling agent.
7. according to a kind of ultrasonic sensor array based on liquid lens described in claim 1-6 any one, it is characterized in that, on each described liquid lens sidewall, two needle tubings are set, a needle tubing is connected with syringe pump by flexible pipe, and another root needle tubing is connected with liquids recovery container by flexible pipe.
8. a kind of ultrasonic sensor array based on liquid lens according to claim 7, is characterized in that, the exit of described liquids recovery container arranges valve.
9. a kind of ultrasonic sensor array based on liquid lens according to claim 1, it is characterized in that, described array bracket comprises more than one support, the circular hole slot that each support comprises groove and is communicated with bottom portion of groove, this groove is for fixing liquid lens, and circular hole slot is for fixing ultrasonic sensing unit.
10. a kind of ultrasonic sensor array based on liquid lens according to claim 9, is characterized in that, described array is that line style is annular or spherical, and in the time being line style, the end of each support and the end of another support connect to form the array bracket of line style; When being when annular, institute's standoff both ends head and the tail connect to form annular array bracket in turn, the center of the opening sensing array bracket of the groove of each support; In the time being spherical, all supports link together and form spherical array bracket, and the opening of the groove of each support all points to the center of ball array support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610180083.6A CN105606210A (en) | 2016-03-24 | 2016-03-24 | Ultrasonic sensor array based on liquid lenses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610180083.6A CN105606210A (en) | 2016-03-24 | 2016-03-24 | Ultrasonic sensor array based on liquid lenses |
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| CN105606210A true CN105606210A (en) | 2016-05-25 |
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| CN201610180083.6A Pending CN105606210A (en) | 2016-03-24 | 2016-03-24 | Ultrasonic sensor array based on liquid lenses |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147656A (en) * | 2017-06-27 | 2019-01-04 | 京东方科技集团股份有限公司 | The repair system and restorative procedure of display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340944A (en) * | 1980-03-07 | 1982-07-20 | Cgr Ultrasonic | Ultrasonic echographic probe having an acoustic lens and an echograph incorporating said probe |
| US7359124B1 (en) * | 2004-04-30 | 2008-04-15 | Louisiana Tech University Research Foundation As A Division Of The Louisiana Tech University Foundation | Wide-angle variable focal length lens system |
| JP4662521B2 (en) * | 2001-07-11 | 2011-03-30 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | Acoustic lens, ultrasonic probe and ultrasonic diagnostic apparatus |
| CN102326093A (en) * | 2009-02-20 | 2012-01-18 | 皇家飞利浦电子股份有限公司 | Utilize the ultrasonic imaging of changeable refractive index lens |
| WO2013190454A2 (en) * | 2012-06-20 | 2013-12-27 | Koninklijke Philips N.V. | Customized optical element |
-
2016
- 2016-03-24 CN CN201610180083.6A patent/CN105606210A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340944A (en) * | 1980-03-07 | 1982-07-20 | Cgr Ultrasonic | Ultrasonic echographic probe having an acoustic lens and an echograph incorporating said probe |
| JP4662521B2 (en) * | 2001-07-11 | 2011-03-30 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | Acoustic lens, ultrasonic probe and ultrasonic diagnostic apparatus |
| US7359124B1 (en) * | 2004-04-30 | 2008-04-15 | Louisiana Tech University Research Foundation As A Division Of The Louisiana Tech University Foundation | Wide-angle variable focal length lens system |
| CN102326093A (en) * | 2009-02-20 | 2012-01-18 | 皇家飞利浦电子股份有限公司 | Utilize the ultrasonic imaging of changeable refractive index lens |
| WO2013190454A2 (en) * | 2012-06-20 | 2013-12-27 | Koninklijke Philips N.V. | Customized optical element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147656A (en) * | 2017-06-27 | 2019-01-04 | 京东方科技集团股份有限公司 | The repair system and restorative procedure of display panel |
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Application publication date: 20160525 |