CN107064551A - A kind of liquid wave guides, high-temperature probe, ultrasonic Doppler velocimeter - Google Patents
A kind of liquid wave guides, high-temperature probe, ultrasonic Doppler velocimeter Download PDFInfo
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- CN107064551A CN107064551A CN201710228846.4A CN201710228846A CN107064551A CN 107064551 A CN107064551 A CN 107064551A CN 201710228846 A CN201710228846 A CN 201710228846A CN 107064551 A CN107064551 A CN 107064551A
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- liquid
- wave guides
- rear wall
- temperature probe
- antetheca
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/24—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01P5/241—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave by using reflection of acoustical waves, i.e. Doppler-effect
Abstract
The present invention discloses a kind of liquid wave guides, high-temperature probe, ultrasonic Doppler velocimeter, wherein, the liquid wave guides include circumferential shell and seal antetheca, the rear wall at the axial two ends of the circumferential shell, the circumferential shell encloses to form cavity with the antetheca, the rear wall, and the inside cavity, which is full of, can transmit the liquid medium of ultrasonic wave.Because spread speed of the ultrasonic wave in liquid medium is relatively low, on the premise of reflectance ultrasound ripple signal and noise have same paths difference, when the two is propagated in liquid wave guides provided by the present invention, reception device, which receives the time difference of the two, to be increased, the delay effect of noise becomes apparent, pure reflectance ultrasound ripple signal is more conducively obtained, to improve the signal to noise ratio of the reflectance ultrasound ripple signal；Under conditions of noise delay same time, the length of liquid wave guides may be significantly lower than that the length of solid waveguide pipe, to reduce decay when ultrasonic signal is transmitted in the waveguide, so as to ensure fathoming for fluid velocity.
Description
Technical field
The present invention relates to high temperature fluid velocity field measurement technical field, more particularly to a kind of liquid wave guides, high-temperature probe,
Ultrasonic Doppler velocimeter.
Background technology
With the continuous consumption of traditional fossil energy and increasingly highlighting for problem of environmental pollution, the mankind are to new, cleaning, peace
The demand of the complete reliable energy is urgent all the more.At present, in the world it is putative can the energy of large-scale application be nuclear energy, its
In, liquid heavy metal reactor, because of its intrinsic safety and reliability, is that current IV is expected to realize business for first in shut-down system
One of heap-type of industry application.
In the application process of liquid heavy metal reactor, its velocity field measurement is Steady State Thermal, transient state fail- safe point
One of important parameter of analysis and engineering verification, but because liquid metal (hereinafter referred to as fluid) has non-transparency, high temperature, strong corruption
All there is larger difficulty all the time in the features such as corrosion, the measurement of its velocity field.At present, UDV is typically used
(Ultrasonic Doppler Velocimetry, i.e. ultrasonic Doppler velocimeter) is measured to the velocity field of fluid.
UDV generally includes body and UDV probes, when in use, and UDV probes can be inserted directly into fluid or with being posted by
On the chamber wall of fluid, UDV probes can launch ultrasonic signal into fluid, mutually to be hit with the trace particle in fluid,
And then reflect, and be transferred to by the probe in body, body is by analyzing between transmitting ultrasonic wave and reflectance ultrasound ripple
Doppler frequency shift be that would know that the velocity field information in fluid.
UDV probes generally include piezo electric module and waveguide, and piezo electric module is for producing, received ultrasonic signal, and ripple
Conduit is then used to be thermally shielded protection to the piezo electric module.Waveguide is used mainly to include at present：Cylindrical metal bar waveguide
Pipe, but there is fault of construction in the inside of this waveguide, and its front and rear wall, perisporium can produce substantial amounts of reflection to ultrasonic wave, dissipate
Penetrate, so that forming substantial amounts of noise, and ultimately cause ultrasonic aliasing；Sawtooth pattern waveguide after improved, is effectively reduced week
The noise that wall reflection is caused, but substantial amounts of shot noise is still suffered from waveguide, and the antetheca of waveguide (is in contact with fluid
Wall) can still have substantial amounts of reflecting background；Conical metal bar waveguide, the waveguide can be gathered to ultrasonic wave
Substantial amounts of shot noise is still suffered from Jiao, lifting lateral resolution, but waveguide, antetheca has substantial amounts of reflecting background；Thin circle
Rod cluster type waveguide, it is welded in one waveguide of composition together, diameter and the ultrasound of every thin rod by substantial amounts of thin rod
Ripple wavelength is close, and is substantially not present scattering loss, but its antetheca still suffers from substantial amounts of reflecting background；Stainless steel foil rolls waveguide
Pipe, thickness and the ultrasonic wavelength of the stainless steel foil are approached, and scattering loss is also substantially not present in waveguide, but its antetheca is still
There is substantial amounts of reflecting background.
The above analysis understands that when in use, its internal federation has a certain amount of reflection, scattering to existing waveguide
The antetheca that noise, especially waveguide are in contact with fluid, can form substantial amounts of reflecting background, easily cause ultrasonic aliasing, this
The detection of waveguide internal reflection ultrasonic frequency is just had a strong impact on, so that the greatly measurement accuracy of limitation UDV probes.
It should be appreciated that it is the Propagation along waveguide that transmitting ultrasound, which involves reflectance ultrasound ripple, it is in waveguide
Propagation path is the length of waveguide in itself, and the direction of propagation of the noise such as above-mentioned scattering, reflection is then generally and axis of a waveguide
To in certain angle so that the propagation path of above-mentioned noise will be longer than the path of reflectance ultrasound ripple, i.e., there is road therebetween
Footpath is poor.In this way, piezo electric module can exist when receiving reflectance ultrasound ripple signal and noise, the regular hour is poor, and noise can be present
Certain delay effect, the time difference is longer, and the delay effect of noise is also better, is more conducive to obtaining pure reflectance ultrasound
Ripple signal.
Based on this, the method for the noise such as the above-mentioned scattering of filtering commonly used in the prior art, reflection is extension waveguide, to prolong
The long above-mentioned time difference so that the delay effect of noise becomes apparent, so as to improve the signal to noise ratio of reflectance ultrasound ripple.But, waveguide
The extension of length of tube, also results in the decay of ultrasonic signal so that when being measured to fluid velocity field, fathom by
Great limitation is arrived.
Therefore, how a kind of waveguide is provided, effectively to reduce the interference of reflecting background, shot noise to ultrasonic signal,
And ensure fathoming for fluid velocity, it is still those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of liquid wave guides, high-temperature probe, ultrasonic Doppler velocimeter, the liquid waveguide
Pipe can effectively reduce the interference of scattering, reflecting background to ultrasonic signal, improve signal to noise ratio, and ensure that the measurement of fluid velocity is deep
Degree.
In order to solve the above technical problems, the present invention provides a kind of liquid wave guides, including circumferential shell and seal the circumference
Antetheca, the rear wall at shell axial direction two ends, the circumferential shell enclose to form cavity with the antetheca, the rear wall, the cavity
Inside, which is full of, can transmit the liquid medium of ultrasonic wave.
Liquid wave guides provided by the present invention, its medium for being used to transmit ultrasonic wave is liquid medium, and ultrasonic wave is in liquid
Spread speed in body medium is far below its spread speed in the solid dielectrics such as stainless steel.It is super in reflection than prior art
On the premise of acoustic signals have same paths poor (i.e. guide length is identical) with noise, when being transmitted in liquid wave guides,
Reception device, which receives the time difference of the two, to be increased, and the delay effect of noise becomes apparent, and more conducively obtains pure reflection
Ultrasonic signal, to improve the signal to noise ratio of the reflectance ultrasound ripple signal.
Correspondingly, under conditions of noise delay same time, the length of liquid wave guides may be significantly lower than that prior art
The length of middle solid waveguide pipe, in this way, decay when ultrasonic signal is transmitted in the waveguide can be greatly decreased, with largely
Reduce the influence to fluid velocity field measurement depth in ground.
Alternatively, the internal face of the circumferential shell is provided with absorbent treatment.
Alternatively, the liquid medium is water, oil or low melting point liquid metal.
Alternatively, the low melting point liquid metal is the metal or alloy that fusing point is less than or equal to 60 DEG C.
Alternatively, the antetheca, 1/2nd integral multiple of the wavelength that the thickness of the rear wall is the ultrasonic wave.
Alternatively, the front face of the antetheca is additionally provided with and treated the wetting layer that fluid measured matches, to cause the ultrasound
Ripple treats fluid measured described in entering.
The present invention also provides a kind of high-temperature probe, including waveguide and the piezoelectricity mould for producing the ultrasonic wave to be transmitted
Block, the piezo electric module is connected with the rear wall of the waveguide；The waveguide is above-mentioned liquid wave guides.
Because above-mentioned liquid wave guides have possessed technique effect as above, then, possess the high temperature of the liquid wave guides
Probe will not be described here also when possessing similar technique effect.
Alternatively, coupling layer is additionally provided between the piezo electric module and the rear wall, to match the piezo electric module and institute
State the acoustic resistance of rear wall.
Alternatively, the piezo electric module includes contact conductor, electronic unit and the piezoelectric unit being sequentially connected, the piezoelectricity
Unit is connected by the coupling layer with the rear wall；Also include containment vessel, the contact conductor, the electronic unit and described
Piezoelectric unit is in the containment vessel, and the containment vessel is coated at the circumferential shell of the liquid wave guides.
The present invention also provides a kind of ultrasonic Doppler velocimeter, including body and high-temperature probe, and the high-temperature probe is upper
The high-temperature probe stated.
Because above-mentioned high-temperature probe has possessed technique effect as above, then, how general the ultrasound for possessing the high-temperature probe is
Tachymeter is strangled also when possessing similar technique effect, therefore be will not be described here.
Brief description of the drawings
Fig. 1 is a kind of structural representation of embodiment of liquid wave guides provided by the present invention；
Fig. 2 is a kind of structural representation of embodiment of high-temperature probe provided by the present invention.
Description of reference numerals in Fig. 1-2 is as follows：
1 liquid wave guides, 11 circumferential shells, 12 antethecas, 13 rear walls, 14 liquid mediums, 15 absorbent treatments；
2 piezo electric modules, 21 contact conductors, 22 electronic units, 23 piezoelectric units, 24 containment vessels；
3 coupling layers.
Embodiment
In order that those skilled in the art more fully understands technical scheme, it is below in conjunction with the accompanying drawings and specific real
Applying example, the present invention is described in further detail.
Fig. 1 is refer to, Fig. 1 is a kind of structural representation of embodiment of liquid wave guides provided by the present invention.
As shown in figure 1, the present invention provides a kind of liquid wave guides 1, including circumferential shell 11 and seal the circumferential shell 11
Antetheca 12, the rear wall 13 at axial two ends, the circumferential shell 11 enclose to form cavity with antetheca 12, rear wall 13, the inside of the cavity
Full of the liquid medium 14 of ultrasonic wave can be transmitted.
Above-mentioned " being full of " refers to that liquid medium 14 has been covered with above-mentioned cavity, any bubble is not present in the cavity, in this way, can
Reflection, refraction of the ultrasonic wave in liquid medium 14 are reduced, so as to ensure that ultrasonic wave passes through the liquid medium 14.
Liquid wave guides 1 provided by the present invention, its medium for being used to transmit ultrasonic wave is liquid medium 14, and ultrasonic wave exists
Spread speed in liquid medium 14 is far below its spread speed in the solid dielectrics such as stainless steel.Than prior art, anti-
On the premise of penetrating ultrasonic signal there are same paths poor (i.e. guide length is identical) with noise, passed in liquid wave guides 1
When defeated, reception device, which receives the time difference of the two, to be increased, and the delay effect of noise becomes apparent, and be more beneficial for obtaining pure
Reflectance ultrasound ripple signal, to improve the signal to noise ratio of the reflectance ultrasound ripple signal.
Correspondingly, under conditions of noise delay same time, the length of liquid wave guides 1 may be significantly lower than that prior art
The length of middle solid waveguide pipe, in this way, decay when ultrasonic signal is transmitted in the waveguide can be greatly decreased, with largely
Reduce the influence to fluid velocity field measurement depth in ground.
For example, the spread speed of ultrasonic wave in a liquid is generally 1500m/s, and the spread speed in stainless steel material
About 6000m/s, it is assumed that the direction of propagation of noise and the axial direction of waveguide are in 60 degree of angles, if reflectance ultrasound ripple signal is in waveguide
Propagation path 100mm in pipe, then the propagation path of noise is 200mm.If the two is passed in stainless steel waveguide
Broadcast, then the delay time of noise is (200-100) × 10-3/ 6000=16.7 μ s；If the two is in liquid wave provided by the present invention
Propagated in conduit 1, then the delay time of noise is (200-100) × 10-3/ 1500=66.7 μ s.Compare and understand, in liquid waveguide
When being propagated in pipe 1, the delay time of noise is 4 times when stainless steel waveguide is propagated, and can more greatly improve noise
Delay effect, and then improve reflectance ultrasound ripple signal signal to noise ratio.Correspondingly, the condition of the identical delay time of noise is being realized
Under, the length of liquid wave guides 1 provided by the present invention can be only stainless steel guide length in the prior art four/
One, so as to which the decay of ultrasonic signal is greatly decreased, it is more beneficial for ensureing fathoming for fluid velocity.
Again because liquid wave guides 1 become apparent when propagating ultrasonic wave to the delay effect of noise, the liquid wave guides 1
Special profile also need not be just set during fabrication, and the manufacture and acquisition of its circumferential shell 11 are more easy.
Production when, the circumferential shell 11 can be round tube, rectangular tube, or sawtooth pipe, conical pipe or other
The tubular structure of form, can be achieved to improve the technique effect of signal to noise ratio.But comparatively, sawtooth pipe can reduce ultrasonic signal
Reflection, shot noise in transmitting procedure, are more beneficial for improving signal to noise ratio.
In addition, aforesaid liquid waveguide 1 can be full split-type structural, and in production, above-mentioned circumferential shell 11, antetheca
12 and rear wall 13 can individually manufacture, and then can using welding, bond etc. mode be sealed in circumferential shell 11 axially two
End；Can also be part split-type structural, in production, above-mentioned circumferential shell 11 can be integrated with antetheca 12 or rear wall 13
Formula structure, to form the tubular structure of one end open, in the tubular structure after hydraulically full medium 14, and then can be using weldering
The mode such as connect, bond and blocking the opening, can also realize above-mentioned technique effect.
Aforesaid liquid medium 14 requires that its decay to ultrasonic wave is smaller in addition to requiring that ultrasonic wave can be transmitted, also.
Specifically, the liquid medium 14 can be for should use up can in water, oil or low melting point liquid metal, and the liquid medium 14
The content of solid impurity particle can be reduced, is scattered with reducing ultrasonic wave in liquid medium 14, refraction loss.Due to water, oil etc.
For the common items in daily life, it is more easy and nontoxic to obtain, and is not easily caused during production and use secondary
Pollution, is the preferred scheme of the embodiment of the present invention.
Above-mentioned low melting point liquid metal refers to the metal being in a liquid state under normal temperature, specifically, refers to that fusing point is less than or equal to
60 DEG C of low-melting-point metal or alloy, refers in particular to the metal or alloy that fusing point is less than or equal to 30 DEG C, to ensure when not in use
The liquid wave guides 1 can be preserved at normal temperatures.More specifically, the low-melting-point metal can close for mercury, gallium, gallium indium tin
Gold, gallium bismuth ferro-aluminum magnesium tin alloy or other metal alloys etc..
It should be appreciated that in addition to above-mentioned cited several liquids, the liquid medium 14 can also be other liquid
Material, as long as its decay that can be used for transmitting ultrasonic wave in ultrasonic wave, and transmitting procedure is smaller.
Still using Fig. 1 as visual angle, the internal face of above-mentioned circumferential shell 11 can be provided with absorbent treatment 15, to absorb liquid medium 14
In reflection, shot noise, so as to further improve signal to noise ratio.It is to be understood that the main letter such as transmitting ultrasonic wave, reflectance ultrasound ripple
Number, the axial direction of its direction of propagation substantially waveguide, so, above-mentioned absorbent treatment 15 will not absorb to above-mentioned main signal.
Above-mentioned absorbent treatment 15 can be specifically the porous sound-absorbing materials such as stainless steel fibre or flexible material, film
The resonance type sound-absorbing material such as shape material.It is appreciated that either porous sound-absorbing material or resonance type sound-absorbing material, Dang Qibao
When being wrapped in the periphery of solid dielectric, it can have substantial amounts of stomata between solid dielectric, and then the formation of noise is reflected so that
Above-mentioned sound-absorbing material can not smooth absorption of noise；And when it is wrapped in the periphery of liquid medium 14, because liquid medium 14 has
There is mobility, liquid medium 14 can easily fill above-mentioned stomata, so as to ensure that noise smoothly can enter in above-mentioned sound-absorbing material
And absorbed.
For above-mentioned each scheme, also the antetheca 12 of the liquid wave guides 1, the structure of rear wall 13 can further be limited
It is fixed.
The antetheca 12, the thickness of rear wall 13 can be 1/2nd integral multiple of the wavelength of ultrasonic wave, to ensure to surpass
Sound wave has optimal efficiency of transmission, and then reduces ultrasonic wave by decay when antetheca 12, rear wall 13, is more beneficial for ensureing stream
Body velocity field fathoms.
The front face of above-mentioned antetheca 12 is also provided with wetting layer (not shown), and the wetting layer can be with treating fluid measured
Characteristic match, with cause the liquid wave guides 1 antetheca 12 insert fluid when, fluid can preferably infiltrate the antetheca 12,
So as to reduce the possibility that bubble between fluid and antetheca 12 is produced, and then cause ultrasonic wave can be smoothly into treating fluid measured.
For the different wetting characteristics for treating fluid measured, the wetting layer material therefor can also make adaptable adjustment.Such as,
If it is lead bismuth alloy to treat fluid measured, the wetting layer can be the nickel or diamond-like coating for being plated on antetheca 12；If treating fluid measured
For lead lithium alloy, then the wetting layer can be the titanium for being plated on antetheca 12；If it is water to treat fluid measured, the wetting layer can be modeling
The multiple materials such as material, annular resin or stainless steel.Regardless of whether using which kind of previous wetting layer material, as long as ensureing that liquid wave guides 1 are inserted
When entering fluid, fluid can form good infiltration to the wetting layer.
Certainly, liquid wave guides 1 provided by the present invention can also be not provided with above-mentioned wetting layer, now, can be used and the profit
Wet layer identical material prepares above-mentioned antetheca 12, can also realize above-mentioned technique effect.
Comparatively, when wetting layer is separately provided, special requirement, liquid are had no for the material for manufacturing liquid wave guides 1
The preparation of the materials such as stainless steel, the liquid wave of being more convenient for can be used directly in circumferential shell 11, antetheca 12 and the rear wall 13 of bulk wave conduit 1
The batch production of conduit 1, then when in use, can combine specific detection environment, be coated in the antetheca 12 of the liquid wave guides 1
Corresponding wetting layer is that can be used；And use when preparing above-mentioned antetheca 12 with wetting layer identical material, Manufactured liquid wave
Conduit 1 can only be detected for corresponding fluid, in detection, then the liquid wave guides 1 need not be reprocessed, more just
In quick measurement.
Fig. 2 is refer to, Fig. 2 is a kind of structural representation of embodiment of high-temperature probe provided by the present invention.
As shown in Fig. 2 the present invention also provides a kind of high-temperature probe, including waveguide and the piezoelectricity mould for producing ultrasonic wave
Block 2, the waveguide is above-mentioned liquid wave guides 1, and piezo electric module 2 is connected with the rear wall 13 of liquid wave guides 1.
Because above-mentioned liquid wave guides 1 have possessed technique effect as above, then, the height with the liquid wave guides 1
Temperature probe will not be described here also when possessing similar technique effect.
Coupling layer 3 is also provided between the piezo electric module 2 and rear wall 13, to match the sound of piezo electric module 2 and rear wall 13
Resistance, so that loss of the ultrasonic wave produced by reducing piezo electric module 2 when entering liquid wave guides 1, is more beneficial for ensureing fluid speed
Spend fathoming for field.
In fact, above-mentioned coupling layer 3 can not only play a part of matching acoustic resistance, at the same time it can also realize piezo electric module 2
Being adhesively fixed between rear wall 13, the material of the coupling layer 3 can be specially the liquid adhesives such as glass solder, silicone oil,
Can be the solid adhesive such as bismuth, indium, tin-lead, copper, gold, when specifically used, those skilled in the art can be according to actual feelings
Condition and select the corresponding material of coupling layer 3.
Above-mentioned piezo electric module 2 can include contact conductor 21, electronic unit 22 and the piezoelectric unit 23 being sequentially connected, the pressure
Electric unit 23 can be connected by coupling layer 3 with rear wall 13.When in use, the contact conductor 21 can be connected with external equipment,
Then external equipment then can apply pulse voltage to piezoelectric unit 23, so that the piezoelectric unit 23 produces transmitting ultrasonic wave.
Above-mentioned piezo electric module 2 can also include containment vessel 24, contact conductor 21, electronic unit 22 and piezoelectric unit 23
So that in containment vessel 24, the containment vessel 24 can be externally fitted on the circumferential shell 11 of liquid wave guides 1.In this way, the containment vessel
24 can enclose to form seal cavity with the rear wall 13 of liquid wave guides 1, to avoid external environment to contact conductor 21, electronic unit
22 and the interference of the grade electronic component of piezoelectric unit 23, it is more beneficial for extending the service life of above-mentioned electronic component.
It should be noted that high-temperature probe provided by the present invention can be not only used for measuring the velocity field of high temperature fluid, also
It can apply in the imaging of high temperature ultrasonic ripple, other hot environments of high temperature ultrasonic wave current measurement, and in different uses
In environment, only different external equipments need to be connected by the contact conductor 21.
The present invention also provides a kind of ultrasonic Doppler velocimeter, including body and high-temperature probe, and the high-temperature probe is above-mentioned
High-temperature probe.
Because above-mentioned high-temperature probe has possessed technique effect as above, then, how general the ultrasound with the high-temperature probe is
Tachymeter is strangled also when possessing similar technique effect, therefore be will not be described here.
It the above is only the preferred embodiment of the present invention, it is noted that come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of liquid wave guides, it is characterised in that including circumferential shell (11) and seal the axial two ends of the circumferential shell (11)
Antetheca (12), rear wall (13), the circumferential shell (11) and the antetheca (12), the rear wall (13) enclose to form cavity,
The inside cavity, which is full of, can transmit the liquid medium (14) of ultrasonic wave.
2. liquid wave guides according to claim 1, it is characterised in that the internal face of the circumferential shell (11) is provided with suction
Sound layer (15).
3. liquid wave guides according to claim 1, it is characterised in that the liquid medium (14) is water, oil or eutectic
Point liquid metal.
4. liquid wave guides according to claim 3, it is characterised in that the low melting point liquid metal be fusing point be less than or
Metal or alloy equal to 60 DEG C.
5. the liquid wave guides according to any one of claim 1-4, it is characterised in that the antetheca (12), it is described after
The thickness of wall (13) is 1/2nd integral multiple of the wavelength of the ultrasonic wave.
6. liquid wave guides according to claim 5, it is characterised in that the front face of the antetheca (12) is additionally provided with and treated
The wetting layer that fluid measured matches, to cause the ultrasonic wave to treat fluid measured described in entering.
7. a kind of high-temperature probe, including waveguide and the piezo electric module (2) for producing ultrasonic wave, it is characterised in that the ripple
Conduit is the liquid wave guides (1) any one of claim 1-6, the piezo electric module (2) and the liquid wave guides
(1) rear wall (13) is connected.
8. high-temperature probe according to claim 7, it is characterised in that the piezo electric module (2) and the rear wall (13) it
Between be additionally provided with coupling layer (3), to match the acoustic resistance of the piezo electric module (2) and the rear wall (13).
9. high-temperature probe according to claim 8, it is characterised in that the piezo electric module (2) includes the electricity being sequentially connected
Pole lead (21), electronic unit (22) and piezoelectric unit (23), the piezoelectric unit (23) by the coupling layer (3) with it is described
Rear wall (13) is connected；
Also include containment vessel (24), the contact conductor (21), the electronic unit (22) and the piezoelectric unit (23) are all provided with
In the containment vessel (24), the containment vessel (24) is coated at the circumferential shell (11) of the liquid wave guides (1).
10. a kind of ultrasonic Doppler velocimeter, including body and high-temperature probe, it is characterised in that the high-temperature probe is right
It is required that the high-temperature probe any one of 7-9.
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Cited By (1)
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Application publication date: 20170818 |