CN109716123A - Supersonic sensing head and supersonic detector with the supersonic sensing head - Google Patents
Supersonic sensing head and supersonic detector with the supersonic sensing head Download PDFInfo
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- CN109716123A CN109716123A CN201780055414.6A CN201780055414A CN109716123A CN 109716123 A CN109716123 A CN 109716123A CN 201780055414 A CN201780055414 A CN 201780055414A CN 109716123 A CN109716123 A CN 109716123A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 abstract description 16
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- 239000008280 blood Substances 0.000 description 7
- 210000004369 blood Anatomy 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 238000012795 verification Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001631 haemodialysis Methods 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 230000010358 mechanical oscillation Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- -1 Hard PVC Polymers 0.000 description 1
- 229920001207 Noryl Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000035515 penetration Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 238000011896 sensitive detection Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
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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
- G01N29/22—Details, e.g. general constructional or apparatus details
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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
- G01N29/02—Analysing fluids
- G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
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- Biochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Acoustics & Sound (AREA)
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
本发明提供一种气泡检测灵敏度高、误检测少的超声波传感头及具有该超声波传感头的超声波检测器。本发明是隔着供液体流动的导管(30)对置配置并能够收发超声波的成对的超声波传感头(1)，成对的超声波传感头(1)中的一方(10)具有面向导管(30)的第1振动面(111)，成对的超声波传感头中的另一方(20)具有面向导管(30)的第2振动面(211)，在液体的流动方向上，第2振动面(211)的宽度小于第1振动面(111)的宽度，第1振动面(111)及第2振动面(211)中的某一方作为超声波的发送面使用，另一方作为超声波的接收面使用。
The invention provides an ultrasonic sensor head with high bubble detection sensitivity and few false detections and an ultrasonic detector with the ultrasonic sensor head. The present invention is a pair of ultrasonic sensor heads (1) which are arranged opposite to each other through a conduit (30) for supplying liquid to transmit and receive ultrasonic waves, and one (10) of the paired ultrasonic sensor heads (1) has a surface facing the The first vibrating surface (111) of the conduit (30), the other (20) of the paired ultrasonic sensor heads has a second vibrating surface (211) facing the conduit (30), and in the flow direction of the liquid, the first vibrating surface (211) is 2. The width of the vibration surface (211) is smaller than the width of the first vibration surface (111), and one of the first vibration surface (111) and the second vibration surface (211) is used as an ultrasonic transmission surface, and the other is used as an ultrasonic transmission surface. Use on the receiving side.
Description
Technical field
The present invention relates to the supersonic sensing heads and tool for being detected to the bubble in the liquid flowed in the catheter
There is the supersonic detector of the supersonic sensing head.
Background technique
In the past, in medical facilities, in order to avoid accidentally injecting air (gas to patient's body when be infused/transfuse blood etc.
Bubble) and use the air-foam detector for detecting bubble.This air-foam detector uses ultrasonic wave as one of detection unit, with can
Applied to opaque medical fluid or blood.
For example, the supersonic detector as detection micro-bubble, proposes matching across the conduit flowed for liquid is opposed
In the pairs of supersonic sensing head set, the narrow width that is formed as the transmitting-receiving face of sensing head to make liquid flow direction it is band-like
Technology (referring to patent document 1).By constituting in this manner, be formed as phase in length and breadth with the transmitting-receiving face of previous sensing head
Compared with the construction of width, the area for transmitting ultrasonic wave reduces, and the ratio that the ultrasonic intensity based on micro-bubble reduces increases,
Therefore it can be improved the detection sensitivity of micro-bubble.
Existing technical literature
Patent document
Patent document 1: Japanese Patent Publication 5-29717 bulletin
Summary of the invention
As described above, the transmitting-receiving face about sensing head, makes the width of liquid flow direction be formed smaller, so that bubble
Detection sensitivity becomes high sensitivity, and in this case, since transmitting-receiving face is small, the ultrasonic wave transmitted weakens, and receives electricity
Pressure reduces, and whether there is or not the voltage differences of judgement also very little for bubble.Therefore, because the material or type of conduit, conduit and sensing head connect
The variation of the ambient enviroments such as touching state, temperature or humidity, and to receive voltage change or unstable, it is easy to happen error detection.
In order to avoid this error detection occurs, usually in supersonic detector, hardware aspect needs to consider complicated return
Road design, software aspects need to consider algorithm etc..
Therefore, a kind of that it is an object of that present invention to provide bubble detection sensitivities is high, error detection is few supersonic sensing head and
Supersonic detector with the supersonic sensing head.
The present invention relates to a kind of pairs of supersonic sensing head, for the arranged opposite and energy across the conduit that is flowed for liquid
The pairs of supersonic sensing head of ultrasonic wave is enough received and dispatched, the side in the pairs of supersonic sensing head has to be led towards described
1st vibration plane of pipe, another party in the pairs of supersonic sensing head have the 2nd vibration plane towards the conduit,
On the flow direction of the liquid, the width of the 2nd vibration plane is less than the width of the 1st vibration plane, the 1st vibration plane
And the one party in the 2nd vibration plane is used as the transmission face of ultrasonic wave, another party uses as the receiving plane of ultrasonic wave.
It is further preferred, that the 1st vibration plane is used as the transmission face of ultrasonic wave, the 2nd vibration plane is as super
The receiving plane of sound wave uses.
It is further preferred, that the pairs of supersonic sensing head is in the 1st vibration plane and the 2nd vibration plane
Place and the mode of the catheter contact configure, the 1st vibration plane by the face cutting vertical with the flow direction of the liquid
Cross sectional shape be formed as that concave curved is linear or evagination is linear.
It is further preferred, that the conduit have flexibility, the 2nd vibration plane by the transmitting-receiving side with the ultrasonic wave
It is linear or linear to be formed as evagination to the cross sectional shape of the face cutting parallel with both flow directions of the liquid.
Moreover, it relates to above-mentioned any pairs of supersonic sensing head and to the liquid flowed in the conduit
The supersonic detector that bubble in body is detected.
The effect of invention
In accordance with the invention it is possible to provide the supersonic sensing head and surpass with this that bubble detection sensitivity is high, error detection is few
The supersonic detector of sound wave sensing head.
Detailed description of the invention
Figure 1A is the composition figure for indicating the embodiment of supersonic sensing head of the invention, is to indicate to match across conduit is opposed
The figure for the pairs of supersonic sensing head set.
Figure 1B is the Y-Y cross-sectional view of Figure 1A.
Fig. 1 C is the composition figure for indicating the embodiment of supersonic sensing head of the invention, is from the 1st vibration surface side
The figure of 1st sensing head.
Fig. 1 D is the composition figure for indicating the embodiment of supersonic sensing head of the invention, is from the 2nd vibration surface side
The figure of 2nd sensing head.
Fig. 2A is the figure for indicating the 1st embodiment of supersonic sensing head of the invention, is to indicate to match across conduit is opposed
The figure of the pairs of supersonic sensing head 1A set.
Fig. 2 B is the Y-Y cross-sectional view of Fig. 2A.
Fig. 2 C is the figure for indicating the 1st embodiment of supersonic sensing head of the invention, is the from the 1st vibration surface side
The figure of 1 sensing head.
Fig. 2 D is the figure for indicating the 1st embodiment of supersonic sensing head of the invention, is the from the 2nd vibration surface side
The figure of 2 sensing heads.
Fig. 3 A is the figure for indicating the 2nd embodiment of supersonic sensing head of the invention, is to indicate to match across conduit is opposed
The figure of the pairs of supersonic sensing head 1B set.
Fig. 3 B is the Y-Y cross-sectional view of Fig. 3 A.
Fig. 3 C is the figure for indicating the 2nd embodiment of supersonic sensing head of the invention, is the from the 1st vibration surface side
The figure of 1 sensing head.
Fig. 3 D is the figure for indicating the 2nd embodiment of supersonic sensing head of the invention, is the from the 2nd vibration surface side
The figure of 2 sensing heads.
Fig. 4 A is to illustrate the send wave from the 2nd vibration plane 211B (sending face) in the 2nd embodiment of the invention
The figure on the perspective plane of the micro-bubble in the case that directive property is high.
Fig. 4 B is illustrated in the 2nd embodiment of the invention, the send wave from the 2nd vibration plane 211B (sending face)
The figure on the perspective plane of the micro-bubble in the case that directive property is low.
Fig. 5 A is the figure for indicating the variation of supersonic sensing head of the invention, be indicate across conduit it is arranged opposite at
Pair supersonic sensing head 1C figure.
Fig. 5 B is the Y-Y cross-sectional view of Fig. 5 A.
Specific embodiment
It is illustrated referring to embodiment of the Figure 1A to Fig. 1 D to pairs of supersonic sensing head of the invention.
Pairs of supersonic sensing head 1 is configured to comprising the 1st sensing head 10 and the 2nd sensing head 20, opposed across conduit 30
Configuration.
1st sensing head 10 includes ultrasonic transmission body 110 and ultrasonic vibrator 120, wherein the ultrasonic transmission body
110 are formed with the 1st vibration plane 111, which carries out the conversion of electric signal and vibration.
2nd sensing head 20 includes ultrasonic transmission body 210 and ultrasonic vibrator 220, wherein the ultrasonic transmission body
210 are formed with the 2nd vibration plane 211, which carries out the conversion of electric signal and vibration.
Ultrasonic transmission body 110 and 210 transmits between ultrasonic vibrator (120,220) and vibration plane (111,211)
Ultrasonic wave.Ultrasonic transmission body 110,210 is formed by resins such as acrylic acid, Hard PVC, Noryls.In this implementation
In mode, ultrasonic transmission body 110,210 is formed by acrylic resin.
In addition, ultrasonic transmission body 110 and 210 not only transmits ultrasonic wave, such as example aftermentioned 1st embodiment and the 2nd
Illustrated in embodiment, by the way that vibration plane is set as concave shape or convex-shaped, additionally it is possible to as make ultrasonic wave assemble or diffusion
Acoustic lens play a role.
1st vibration plane 111 and the 2nd vibration plane 211 are formed in ultrasonic wave biography in a manner of the side towards conduit 30 respectively
Defeated body 110 and 210, contacts with conduit 30 and transmits ultrasonic wave.1st vibration plane 111 is formed as round as shown in Figure 1 C, the 2nd vibration
Dynamic face 211 is formed as rectangular-shaped as shown in figure iD.
As shown in Fig. 1 C and Fig. 1 D, on the flow direction (direction y) of liquid, the width w2 of the 2nd vibration plane 211 is formed
Less than the width w1 of the 1st vibration plane 111.Specifically, ratio preferably 0.1 to 0.7 or so of the width w2 relative to width w1.If
Ratio is greater than 0.1, then the area of the 2nd vibration plane 211 increases, and the transmit-receive intensity of ultrasonic wave increases, and receives voltage and is easy to stablize, because
This is preferably.In addition, width w2 reduces if ratio is less than 0.7, the sensitivity for being able to detect micro-bubble can be obtained, therefore
It is preferred that.
In addition, when by the 1st sensing head 10 and the 2nd sensing head 20 arranged opposite, in the flow direction (direction y) of liquid
On, it is wider due to sending the one party in face and receiving plane, even if also can reliably be carried out without accurate contraposition
Transmitting-receiving.
As shown in Figure 1B to Fig. 1 D, in the sending direction (direction x) two with the flow direction of liquid (direction y) and ultrasonic wave
On the vertical direction z of person, as an example, the width h2 of the width h1 and the 2nd vibration plane 211 that are configured to the 1st vibration plane 111 have
Identical size.
About width h1 and width h2, in the case that the bubble in the liquid small to viscosity detects, it is desirable to
In the state that flexible conduit 30 is sandwiched by the 1st vibration plane 111 and the 2nd vibration plane 211, at least with the direction z of conduit 30
Internal diameter it is identical.If constituting in this manner, since ultrasonic wave penetrates the major part in conduit 30 in a z-direction,
The leak detection of bubble can be reduced.
In addition, the bubble in tough liquid is easy to pass through from the central portion of conduit 30.As a result, to tough liquid
In the case that bubble in body is detected, in order to penetrate ultrasonic wave from the central portion of conduit 30, width h1 and width h2 are extremely
It is less the size of the half of 30 internal diameter of conduit or so.But from the angle of practicability and safety is paid the utmost attention to, width h1
And width h2 is preferably identical as the internal diameter in the direction z of conduit 30.
Disk-shaped piezoelectric element is used as ultrasonic vibrator 120 and 220, is installed respectively on its two sides (not shown)
The electric signal of input can be converted to mechanical oscillation by electrode, in addition, electric signal can be converted to for the mechanical oscillation transmitted
And it exports.Ultrasonic vibrator 120 and 220 is embedded in the inside of ultrasonic transmission body 110 and 210 respectively.As piezoelectric element
Material, be able to use the piezoelectricity polymeric membrane such as the piezoelectric membranes such as the piezoelectric ceramics, zinc oxide of lead zirconate titanate etc., vinylidene fluoride
Deng.In the present embodiment, as the materials'use lead zirconate titanate of piezoelectric element, silver and platinum are used as electrode.
Conduit 30 is formed by the pipe of the flexibility such as flexible vinyl chloride (PVC), silicon (Si), for example, using as medical pipe outer
The pipe etc. that diameter is 5.5 to 6.5mm, internal diameter is 3.5 to 4.5mm.
The 1st sensing head 10 and the 2nd sensing head 20 described above for constituting pairs of supersonic sensing head 1, can distinguish
Delivery header and reception head as supersonic detector use.
Next, explanation is used using the 1st sensing head as delivery header, using the 2nd sensing head as connecing in the 1st embodiment
The composition that uses of head is received, explanation is used using the 2nd sensing head as delivery header, using the 1st sensing head as connecing in the 2nd embodiment
Receive the composition that head uses.
The 1st embodiment > of <
The 1st embodiment of the invention is illustrated referring to Fig. 2.Identical attached drawing is marked to composition identical with Fig. 1
It marks and omits the description.
Fig. 2A indicate across conduit pairs of supersonic sensing head 1A, Fig. 2 B arranged opposite be Fig. 2A Y-Y cross-sectional view.
Pairs of supersonic sensing head 1A is configured to comprising the 1st sensing head 10A as delivery header and as reception head
2nd sensing head 20A, it is arranged opposite across the pipe (outer diameter 5.5mm, internal diameter 3.5mm) as conduit 30.
1st sensing head 10A includes ultrasonic transmission body 110A and ultrasonic vibrator 120, wherein the ultrasonic transmission body
110A is formed with the 1st vibration plane 111A as the face of transmission, which carries out the conversion of electric signal and vibration.
2nd sensing head 20A includes being formed with ultrasonic transmission body 210A and ultrasonic vibrator 220, wherein the ultrasonic wave
2nd vibration plane 211A of the body 210A as receiving plane is transmitted, which carries out the conversion of electric signal and vibration.
Ultrasonic transmission body 110A and 210A other than the shape of each vibration plane is different, with ultrasonic transmission body 110 and
210 are similarly constituted.
1st vibration plane 111A is as shown in Figure 2 B, is formed on ultrasonic transmission body 110A with concave shape, from the direction x
Perspective plane be diameter 6.9mm (=h1A=w1A) circle.In more detail, the 1st vibration plane 111A is by the stream with liquid
The mode of side of the cross sectional shape of dynamic direction (direction y) vertical face cutting along conduit 30 is formed as concave curved threadiness.By pressing
It is constituted according to this mode, it, being capable of efficiently guide since the side of conduit 30 and the adaptation of the 1st vibration plane 111A are improved
Liquid in pipe 30 transmits ultrasonic wave.
In addition, since the side of conduit 30 and the contact area increase of the 1st vibration plane 111A can be made, it can be efficient
Liquid of the ground into conduit 30 transmits ultrasonic wave, and improves the directive property of ultrasonic wave.Further, since being formed as the 1st of concave shape
Lens effect at vibration plane 111A, ultrasonic wave are easy to assemble.Thus, it is possible to improve the transmission intensity of ultrasonic wave.
2nd vibration plane 211A is as shown in Figure 2 A and 2 B, is formed on ultrasonic transmission body 210A with convex-shaped, from the side-x
To the perspective plane of observation be width w2A=1.4mm, width h2A=6.9mm it is rectangular-shaped.In more detail, the 2nd vibration plane
211A is as shown in Figure 2 A, and by the flow direction (direction y) of transmit-receive position (direction x) and liquid with ultrasonic wave, both is parallel
The cross sectional shape of face (x/y plane) cutting is formed as evagination threadiness relative to the side of flexible conduit 30.By according to this
Kind mode is constituted, and since the side of conduit 30 and the adaptation of the 2nd vibration plane 211A are improved, can efficiently transmit transmission
The ultrasonic wave of liquid.Thereby, it is possible to improve receiving intensity.
In addition, on the flow direction (direction y) of liquid, since the width w2A of the 2nd vibration plane 211A (receiving plane) is small,
Therefore ratio shared by the perspective plane of the micro-bubble in receiving plane increases.As a result, through the ultrasonic wave of liquid by micro-bubble
The ratio for reflecting and reaching the ultrasonic attenuation of receiving plane increases, and can detect micro-bubble with high sensitivity.
According to the pairs of supersonic sensing head 1A of the 1st embodiment, following effect can be played.
(1) on the flow direction of liquid (direction y), the width w2A of the 2nd vibration plane 211A (receiving plane) is less than the 1st vibration
The width w1A of dynamic face 111A (sending face).By constituting in this manner, by the 1st sensing head 10A (delivery header) and the 2nd
It is wider due to sending face on the flow direction (direction y) of liquid when sensing head 20A (receiving head) is arranged opposite, even if
It aligns without sending face and the accurate of receiving plane, can also be received and dispatched in such a way that send wave is without departing from receiving plane.As a result,
The transmit-receive intensity that ultrasonic wave can be enhanced, when pairs of supersonic sensing head 1A is applied to supersonic detector, from connecing
Receive the reception voltage stabilization of head.
(2) on the flow direction of liquid (direction y), since the width w2A of the 2nd vibration plane 211A (receiving plane) is small, because
Ratio shared by the perspective plane of micro-bubble in this receiving plane is big.As a result, since the ultrasonic wave through penetration by liquid is by small
The ratio that bubble reflects and reaches the ultrasonic attenuation of receiving plane is big, therefore can detect micro-bubble with high sensitivity.
(3) the 1st vibration plane 111A (send face) are by the section of the vertical face cutting in flow direction (direction y) with liquid
Mode of the shape along the side of conduit 30 is formed as concave curved threadiness.By constituting in this manner, the side of conduit 30 and hair
It send the adaptation in face to improve, the contact area of the two can be made to further increase, therefore liquid that can efficiently into conduit 30
Body transmits ultrasonic wave.In addition, big due to sending face, the directive property of ultrasonic wave is improved.In addition, since transmission face is formed as recessed
Planar assembles ultrasonic wave because of its lens effect, and directive property further increases.It is strong thereby, it is possible to improve the transmission of ultrasonic wave
Degree, makes the output voltage stabilization in supersonic detector.
(4) conduit 30 have flexibility, and the 2nd vibration plane 211A (receiving plane) by the transmit-receive position (side x with ultrasonic wave
To) with the cross sectional shape of both parallel face (x/y plane) cutting of the flow direction (direction y) of liquid be formed as evagination threadiness.
By constituting in this manner, since the side of conduit 30 and the adaptation of receiving plane are improved, can efficiently transmit
Through the ultrasonic wave of liquid.Thereby, it is possible to improve receiving intensity, make the output voltage stabilization in supersonic detector.
In addition, since the width w2A of the receiving plane on liquid flow direction (direction y) is small, it is small in receiving plane
Ratio shared by the perspective plane of bubble increases.It is reflected as a result, through the ultrasonic wave of liquid by micro-bubble and reaches receiving plane
The ratio of ultrasonic attenuation increases, and can detect micro-bubble with high sensitivity.
The 2nd embodiment > of <
The 2nd embodiment of the invention is illustrated referring to Fig. 3 and Fig. 4.Composition identical with Fig. 1 and Fig. 2 is marked
It infuses identical appended drawing reference and omits the description.
Fig. 3 A indicate across conduit pairs of supersonic sensing head 1B, Fig. 3 B arranged opposite be Fig. 3 A Y-Y cross-sectional view.
Pairs of supersonic sensing head 1B is configured to comprising as the 2nd sensing head 20B (20A) of delivery header and as reception
1st sensing head 10B (10A) of head, it is arranged opposite across the pipe (outer diameter 5.5mm, internal diameter 3.5mm) as conduit 30.
In the 2nd embodiment, using the 1st sensing head 10A used in the 1st embodiment as delivery header as receiving
Head (the 1st sensing head 10B) uses, using in the 1st embodiment as the 2nd sensing head 20A that uses of reception head as delivery header
(the 2nd sensing head 20B) is used, and this point is different from the 1st embodiment.Shape of each vibration plane etc. due to the 1st embodiment
It is identical and omit the description.
2nd vibration plane 211B (211A) is as shown in Fig. 3 A and Fig. 3 B, with convex surface on ultrasonic transmission body 210B (210A)
Shape is formed.In more detail, the 2nd vibration plane 211B (211A) as shown in Figure 3A, by with ultrasonic wave transmit-receive position (direction x) and
The cross sectional shape of both parallel face (x/y plane) cutting of the flow direction (direction y) of liquid, leads relative to flexible
The side of pipe 30 is formed as evagination threadiness.Side and the 2nd vibration plane 211B by constituting in this manner, due to conduit 30
The adaptation of (211A) improves, therefore efficiently can transmit ultrasonic wave by the liquid into conduit 30.Thus, it is possible to improve to send
Intensity.
1st vibration plane 111B (111A) as shown in Figure 3B, is formed on ultrasonic transmission body 110B with concave shape.In more detail
For, the 1st vibration plane 111B (111A) with by the cross sectional shape of the vertical face cutting in flow direction (direction y) with liquid along leading
The mode of the side of pipe 30 is formed as concave curved threadiness.By constituting in this manner, due to side and the 1st vibration of conduit 30
The adaptation of face 111B (111A) improves, therefore the ultrasonic wave through liquid that can efficiently in transmitting catheter 30.Thus, it is possible to
Enough improve receiving intensity.
In the 2nd embodiment, the mechanism of highly sensitive detection micro-bubble is illustrated referring to Fig. 4.Fig. 4 A is that explanation comes from
The figure on the perspective plane of the micro-bubble in the case that the directive property of the send wave of the 2nd vibration plane 211B (sending face) is high, Fig. 4 B are
Illustrate the perspective plane of the micro-bubble in the case that the directive property of the send wave from the 2nd vibration plane 211B (sending face) is low
Figure.
As shown in Figure 4 A, (oblique in a part of receiving plane in the case where the ultrasonic wave directive property sent from the face of transmission is high
Line part PA) receive send wave.In this case, although it is believed that the ratio on the perspective plane of the micro-bubble of receiving plane entirety is non-
It is often small, but the oblique line portion P with regard to receiving send wave on receiving planeAFor, it may be said that ratio shared by the perspective plane of micro-bubble
Degree that can be detected has been arrived greatly.If being reflected as a result, through the ultrasonic wave of liquid by micro-bubble, connecing in receiving plane is reached
Transmit and receive the oblique line portion P of waveAUltrasonic attenuation ratio increase, therefore can with high sensitivity detect micro-bubble.
In the case where the directive property of the ultrasonic wave sent from the face of transmission is low, for example, it is contemplated that due to the width w2B for sending face
It is small and make send wave directive property reduce the case where, or due to transmission face is formed as convex-shaped and under the action of its lens effect
Ultrasonic wave is easy the case where diffusion.
As shown in Figure 4 B, (oblique in the major part of receiving plane in the case where the ultrasonic wave directive property sent from the face of transmission is low
Line part PB) at receive send wave.Receiving plane is compared with transmission face, since the width on liquid flow direction (direction y) is wide,
It therefore, also can be in the oblique line portion P in receiving plane even if the ultrasonic wave through liquid is spread in the y-directionBIt receives.In addition,
There are in the case where micro-bubble, on the receiving surface, the diffusion of micro-bubble and ultrasonic wave expands throwing together in y-direction
Shadow.If being reflected as a result, through the ultrasonic wave of liquid by micro-bubble, the oblique line portion of the reception send wave in receiving plane is reached
PBThe ultrasonic attenuation spread in y-direction ratio increase, therefore can with high sensitivity detect micro-bubble.
According to the pairs of supersonic sensing head 1B of the 2nd embodiment, following effect can be played.
(5) on the flow direction of liquid (direction y), the width w1B of the 1st vibration plane 111B (receiving plane) is less than the 2nd vibration
The width w2B of dynamic face 211B (sending face).By constituting in this manner, by the 2nd sensing head 20B (delivery header) and the 1st
When sensing head 10B (receiving head) is arranged opposite, on the flow direction (direction y) of liquid, since receiving plane is wider, even if
It aligns without sending face and the accurate of receiving plane, can also be received and dispatched in such a way that send wave is without departing from receiving plane.Thus
The transmit-receive intensity that ultrasonic wave can be enhanced, when pairs of supersonic sensing head 1B is applied to supersonic detector, from connecing
Receive the reception voltage stabilization of head.
(6) the 1st vibration plane 111B (receiving plane) are by the section of the vertical face cutting in flow direction (direction y) with liquid
Mode of the shape along the side of conduit 30 is formed as concave curved threadiness.By constituting in this manner, due to the side of conduit 30
It is improved with the adaptation in the face of transmission, therefore can efficiently transmit the ultrasonic wave through the liquid in conduit 30.Thereby, it is possible to mention
The receiving intensity of praetersonic, the output voltage stabilization in supersonic detector.
(7) conduit 30 has a flexibility, and the 2nd vibration plane 211B (send face) by the transmit-receive position (side x with ultrasonic wave
To) with the cross sectional shape of both parallel face (x/y plane) cutting of the flow direction (direction y) of liquid be formed as evagination threadiness.
It, being capable of efficiently guide since the side of conduit 30 and the adaptation of receiving plane are improved by constituting in this manner
Liquid in pipe 30 transmits ultrasonic wave.Thus, it is possible to improve transmission intensity, the output voltage stabilization of air-foam detector.
(8) on the flow direction of liquid (direction y), the width w1B of the 1st vibration plane 111B (receiving plane) is less than the 2nd vibration
The width w2B of dynamic face 211 (sending face).By constituting in this manner, in the directive property of the ultrasonic wave sent from the face of transmission
In the case where height, if the ultrasonic wave through liquid is reflected by micro-bubble, one of the reception send wave in receiving plane is reached
Divide (oblique line portion PA) ultrasonic attenuation ratio increase, therefore can with high sensitivity detect micro-bubble.
In addition, if the ultrasonic wave through liquid is reflected by micro-bubble, being arrived in the case where the directive property of ultrasonic wave is low
Up to major part (the oblique line portion P for receiving send wave in receiving planeB) the ultrasonic attenuation spread in y-direction ratio increase
Greatly, therefore micro-bubble can be detected with high sensitivity.
Embodiment
Below according to embodiment, the present invention will be described in further detail.But the scope of the present invention is not limited to the implementation
Example.
Using the pairs of supersonic sensing head illustrated in the first embodiment described above and the 2nd embodiment and with it is previous
The corresponding supersonic sensing head of the composition of technology, has carried out bubble test experience.Bubble test experience uses blood (not shown)
Dialysis apparatus carries out.
[embodiment 1]
Haemodialysis equipment is configured to include that the flexible pipe as conduit 30 and having is said in the 1st embodiment
The supersonic detector of bright supersonic sensing head 1A.Pipe has prepared that outer diameter is 5.5mm, internal diameter is the flexible of 3.5mm
Vinyl chloride component.Replace blood or medical fluid, makes to be heated to the water with about 36 DEG C of body fluid same degree temperature with 250mL/
The flow velocity divided flows into pipe.
By pairs of supersonic sensing head 1A installation arranged opposite in a manner of clamping pipe.In the state moved the water to flow into pipe
Under, using the micro-bubble (bubble diameter about 0.83mm) of 0.3 μ L of micro syringe bolus injection, use haemodialysis equipment
Carry out the verification and measurement ratio of confirmation bubble and the bubble test experience of voltage change.It repeats the experiment 30 times, to bubble verification and measurement ratio and electricity
The stability of pressure is evaluated.
[embodiment 2]
The pairs of supersonic sensing head 1B illustrated in the 2nd embodiment is used as supersonic sensing head, with implementation
Example 1 is carried out similarly bubble test experience.
[comparative example 1]
As supersonic sensing head, using the 1st sensing head 10A illustrated in the 1st embodiment by two constitute at
Pair supersonic sensing head, similarly to Example 1 carry out bubble test experience.
[comparative example 2]
As supersonic sensing head, using the 2nd sensing head 20A illustrated in the 1st embodiment by two constitute at
Pair supersonic sensing head, similarly to Example 1 carry out bubble test experience.
The experimental result of embodiment 1,2 and comparative example 1,2 is shown in table 1.
[table 1]
| Bubble verification and measurement ratio | Receive voltage change | |
| Embodiment 1 | 93% | Within ± 0.1V |
| Embodiment 2 | 87% | Within ± 0.1V |
| Comparative example 1 | 23% | Within ± 0.1V |
| Comparative example 2 | 93% | ± 0.1V or more is unstable |
As shown in table 1, compared with comparative example 1, bubble verification and measurement ratio is increased substantially in embodiment 1 and 2.Also, this implementation
The bubble test experience of example is carried out using the small water of viscosity, therefore bubble verification and measurement ratio is 93% and 87%, but is greater than water in viscosity
Infusion used in liquid or blood, since micro-bubble is easy to pass through from the central portion of pipe, speculate that verification and measurement ratio reaches
To 100%.
In addition, receiving the stable knot that voltage change is ± 0.1V since embodiment 1 and 2 obtains compared with comparative example 2
Fruit, therefore, the supersonic detector with pairs of supersonic sensing head of the invention are able to suppress the generation of error detection.By
This, can be without complicated loop design, the algorithm research of software etc. in order not to hardware needed for error detection occurs, Neng Goujian
Change the composition of supersonic detector.
Above to a preferred embodiment for pairs of supersonic sensing head 1 and supersonic detector of the invention into
Explanation is gone, but the present invention is not limited to the above embodiments, can suitably change.
For example, the 1st vibration plane 111 about embodiment, show as an example the construction of round but it is also possible to be
Ellipticity is rectangular-shaped.
In addition, forming the 1st vibration on ultrasonic transmission body in the 1st embodiment and the 2nd embodiment with concave shape
Face, but not limited to this.That is, as shown in Fig. 5 A and Fig. 5 B the 1st vibration can also be formed with convex-shaped on ultrasonic transmission body 110C
Dynamic face 111C.
In addition, forming the 2nd vibration plane on ultrasonic transmission body in the 1st embodiment with convex-shaped, but be not limited to
This.That is, as shown in Fig. 5 A and Fig. 5 B, it can also be on ultrasonic transmission body 210C with planar (linear) the 2nd vibration of formation
Face 211C.
In addition, showing supersonic sensing head in the 1st and the 2nd embodiment and being transmitted with vibration plane with catheter contact
The composition of the contact of ultrasonic wave, but idea of the invention can also apply to contactless supersonic sensing head.
In addition, being illustrated flexible pipe as the one of conduit, but be not limited in the 1st and the 2nd embodiment
This.As conduit, it is not limited to medical or industrial resin pipe, idea of the invention can also apply to metal tube, match
Pipe etc..
In addition, saturating as blood is illustrated using one of the supersonic detector with supersonic sensing head of the invention
Analysis apparatus, but not limited to this.It can be applied to there are problems that the blood circuit become or the medical treatment that connect of infusion circuit with bubble
Equipment etc., in addition, the field for needing to carry out bubble detection can also be widely applied other than medical field.
Description of symbols
1 pairs of supersonic sensing head
10 the 1st sensing heads
20 the 2nd sensing heads
30 conduits (pipe)
110,210 ultrasonic transmission body
111 the 1st vibration planes
120,220 ultrasonic vibrator
211 the 2nd vibration planes
Claims (5)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016180854A JP6856995B2 (en) | 2016-09-15 | 2016-09-15 | An ultrasonic sensor head and an ultrasonic detector including the ultrasonic sensor head |
| JP2016-180854 | 2016-09-15 | ||
| PCT/JP2017/032152 WO2018051865A1 (en) | 2016-09-15 | 2017-09-06 | Ultrasonic sensor head and ultrasonic detector having said ultrasonic sensor head |
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| Publication Number | Publication Date |
|---|---|
| CN109716123A true CN109716123A (en) | 2019-05-03 |
| CN109716123B CN109716123B (en) | 2023-02-28 |
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|---|---|---|---|
| CN201780055414.6A Active CN109716123B (en) | 2016-09-15 | 2017-09-06 | Ultrasonic sensing head and ultrasonic detector with same |
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|---|---|
| JP (1) | JP6856995B2 (en) |
| CN (1) | CN109716123B (en) |
| WO (1) | WO2018051865A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2018044893A (en) | 2018-03-22 |
| CN109716123B (en) | 2023-02-28 |
| WO2018051865A1 (en) | 2018-03-22 |
| JP6856995B2 (en) | 2021-04-14 |
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