CN102879044A - Housing structure of ultrasonic transducer - Google Patents

Housing structure of ultrasonic transducer Download PDF

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Publication number
CN102879044A
CN102879044A CN2011101988927A CN201110198892A CN102879044A CN 102879044 A CN102879044 A CN 102879044A CN 2011101988927 A CN2011101988927 A CN 2011101988927A CN 201110198892 A CN201110198892 A CN 201110198892A CN 102879044 A CN102879044 A CN 102879044A
Authority
CN
China
Prior art keywords
self
housing
damping plate
damping
damping plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011101988927A
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Chinese (zh)
Inventor
王江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI YINUO INSTRUMENT CO Ltd
Original Assignee
SHANGHAI YINUO INSTRUMENT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI YINUO INSTRUMENT CO Ltd filed Critical SHANGHAI YINUO INSTRUMENT CO Ltd
Priority to CN2011101988927A priority Critical patent/CN102879044A/en
Publication of CN102879044A publication Critical patent/CN102879044A/en
Pending legal-status Critical Current

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Abstract

The invention provides a housing structure of an ultrasonic transducer. According to the housing structure of the ultrasonic transducer, a housing is a column body; two ends of the housing are opening ends which are inwards concave and provided with central holes. The housing structure is characterized in that the housing is a step type column body; at least one group of self-damping plates is arranged in the middle of the housing; the self-damping plates and the housing are integrally machined through the same material; and clearances are formed between the self-damping plates and the housing on two sides thereof. Two to three groups of self-damping plates are arranged; the self-damping plates are circular, or the surfaces on the two sides of the self-damping plates are in the shape of waves, or the two sides of the self-damping plates are in the shape of concave surfaces. For an emitting energy exchanger, the self-damping plates are used for reducing and even removing outward interference signals so as to prevent interference signals from being propagated to the outside or reduce the outward signal propagation; and for a receiving energy exchanger, the self-damping plates are used for reducing and even removing the rest outward interference signals and random interference signals so as to prevent the outward interference signals from being propagated or reduce the propagation to a receiving vibrator subassembly.

Description

Casing structure of ultrasonic energy converter
Technical field
The present invention is the housing that ultrasonic transducer is used, particularly to the improvement of its structure.
Background technology
Present (gas) ultrasonic flow meter, the parts of most critical are ultrasonic transducer.Its specific works situation is, when ticker under activation voltage, do the porpoise campaign, and produce forward useful signal and produce backward unofficial biography undesired signal (also claiming unwanted signals).This unwanted signals can pass to coupled transmitting transducer shell, is delivered on the measuring tube, and then is delivered to accepting on the transducer enclosure of another correspondence with measuring tube, is delivered to and accepts on the ticker assembly.
The speed that acoustic wave energy is propagated in gas is approximately 300~600m/s, and the speed of propagating in metal is approximately 3000~6000m/s.Useful signal V oTravel path be transmitting transducer and accept air line distance L between the transducer 1, the medium of its approach is the tested gas in the measuring tube; Unofficial biography undesired signal V 1Travel path be transmitting transducer and accept the distance L that metal between the transducer connects 2(be approximately 2 times L 1) medium of its approach is metal.So at useful signal V oWhen transducer P002 is accepted in arrival, unofficial biography undesired signal V 1Reach already and accept transducer, and caused the vibration of accepting to accept in the transducer ticker assembly; Acoustic wave energy attenuation rate in gas decays with how much multiples simultaneously, and the attenuation rate of acoustic wave energy in metal decays with arithmetic value.That is to say, unwanted signals (unofficial biography undesired signal) not only arrives than useful signal is early, and signal intensity also wants large many.
In addition, pipeline can be caused by extraneous percussion vibration etc. and passes undesired signal in random, and also random being added in accepted on the transducer simultaneously, therefore in the signal after useful signal and unofficial biography undesired signal, interior biography undesired signal are synthetic, will be difficult to recognize useful signal.
At present, the main method that solves unofficial biography undesired signal and interior biography undesired signal is, in the housing of transducer in, the rubber lining of filling cyath vin type.This wine glass-shaped rubber lining is a kind of absorbing material.The ultrasonic transducer housing of this structure, can reduce on the one hand passing undesired signal in the unofficial biography undesired signal, but also can absorb the vibrational energy of ticker assembly when vibration simultaneously, reduce vibrating effect, reduce the intensity of useful signal, and then caused the accuracy rate of measurement data to reduce.
Summary of the invention
Shortcoming in view of above-mentioned prior art exists the invention provides a kind of improved casing structure of ultrasonic energy converter.
A kind of casing structure of ultrasonic energy converter, housing are right cylinder, and two ends are the open end of indent, and are provided with center pit, it is characterized in that, housing is the step right cylinder; At the middle part of housing, be provided with at least by one group of self-damping plate, self-damping plate and shell are that the same material one processes; Gapped between the housing of self-damping plate and its both sides.
The present invention adopts a kind of and the method for transducer enclosure with the self-damping plate of material one processing, solves V 1(unofficial biography undesired signal) and V 2(Interior biography undesired signal) problem.
Principle of work of the present invention: transducer is in the emission situation, and the ticker assembly is done the porpoise campaign under activation voltage, and produces forward useful signal and produce backward unwanted signals (unofficial biography undesired signal).Owing to not having the absorbing material on every side, so its useful signal forward can not be absorbed, but all launches, injecting (gas or liquid) in the measured medium; Behind the approach measured medium, arrive in the transducer of the other end; Meanwhile, because when emission ticker assembly is done the porpoise campaign, produce simultaneously unwanted signals (unofficial biography undesired signal) backward, during the self-damping plate of this signal pathway transducer enclosure, its acoustic wave energy will make self-damping plate vibration-generating (swing), this vibration (swing) motion, to consume in a large number the energy of (absorption) unofficial biography undesired signal, produce the weakening effect, thereby reach minimizing, even eliminate the purpose of unofficial biography undesired signal.
Simultaneously, when the random interfering signal that caused by extraneous percussion vibration etc. when pipeline passed undesired signal namely, this random interfering signal also will be along the inverse path of unofficial biography undesired signal, by the self-damping plate arrival ticker assembly of transducer enclosure.In like manner, interior biography undesired signal also will by a large amount of consumption (absorption) in the self-damping plate, only have the ticker assembly in the arrival transducer seldom.
For transmitting transducer, the effect of its self-damping plate is to reduce, even eliminates the unofficial biography undesired signal, make it and can not propagate or blaze abroad less,
For receiving transducer, the effect of its self-damping plate is to reduce, even eliminates remaining unofficial biography undesired signal and random interfering signal, makes it to propagate or propagate into less to receive on the ticker assembly.
The weakening effect of self-damping plate is relevant with following factors:
1: the sheet number of self-damping plate is more, the unofficial biography undesired signal of its consumption (absorption) and interior biography undesired signal energy are just more, the weakening effect is just better, but too many sheet number, although weakening is effective, but its processing and cost are again new problems, and through a large amount of experiment and calculating, the sheet number of self-damping plate gets final product with 2 to 3.
: 2: the inside and outside footpath ratio=d/D of self-damping plate, the d/D value is less, the weakening effect is just better, too little difficult processing, and easy fracture, thus with between d/D=0.3~0.4 for well.
3, the radius-thickness ratio=d/h of self-damping plate, the d/h value is larger, the weakening effect is just better, but is difficult for processing too greatly, and easy fracture, thus with between d/h=3~4 for well.
4, the shape of self-damping plate can have multiplely, and namely the profile of self-damping plate is disc, or the both side surface of self-damping plate is corrugated, or the both sides of self-damping plate are concave shape.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is dull and stereotyped self-damping plate structure schematic diagram.
Accompanying drawing 3 is ripple self-damping plate structure schematic diagram.
Accompanying drawing 4 is concave surface self-damping plate structure schematic diagram.
Accompanying drawing 5 is A-A section left views of Fig. 2.
Accompanying drawing 6 is that the present invention uses the status architecture schematic diagram at ultrasonic transducer.
1 housing, 2 self-damping plates, 21 dull and stereotyped self-damping plates, 22 ripple self-damping plates, 23 concave surface self-damping plates, 3 ultrasonic transducers.
Embodiment
Embodiment 1
A kind of casing structure of ultrasonic energy converter, housing are right cylinder, and two ends are the open end of indent, and are provided with center pit; Housing is the step right cylinder; At the middle part of housing, be provided with 2 groups of self-damping plates, self-damping plate and shell are that the same material one processes; Gapped between the housing of self-damping plate and its both sides.The self-damping plate adopts dull and stereotyped self-damping plate, and namely the profile of self-damping plate is disc.
The inner diameter d of self-damping plate and the ratio=d/D=0.3 of external diameter~0.4; Radius-thickness ratio=d/h=3 of the inner diameter d of self-damping plate and thickness of slab h~4; Gap delta between the self-damping plate is 3 times of thickness of slab h.
Embodiment 2
A kind of casing structure of ultrasonic energy converter adopts ripple self-damping plate, and namely the both side surface of self-damping plate is corrugated, described corrugated self-damping plate, and ripple is than h/H1=1.5~2; Ripple ratio is n/(D-d);
D is the internal diameter of damping sheet;
D is the external diameter of damping sheet;
H is corrugated self-damping plate thickness;
H1 is plate thickness and both sides ripple thickness sum;
N is the ripple number.
Ripple can increase the absorption of acoustic wave energy, thereby improves the ability that stops the acoustic wave energy unofficial biography, and improves the ability that passes in the undesired signal that stops.
Other structures are with embodiment 1.
Embodiment 3
A kind of casing structure of ultrasonic energy converter adopts concave surface self-damping plate, and namely the both sides of self-damping plate are concave shape.
The radius-of-curvature ρ of described concave shape self-damping plate concave surface=50~200.With the absorption of increase acoustic wave energy, thereby improve the ability that stops the acoustic wave energy unofficial biography, and improve the interior ability that passes of undesired signal that stops
Other structures are with embodiment 1.

Claims (5)

1. casing structure of ultrasonic energy converter, housing is right cylinder, and two ends are the open end of indent, and are provided with center pit, it is characterized in that, and housing is the step right cylinder; At the middle part of housing, be provided with at least by one group of self-damping plate, self-damping plate and shell are that the same material one processes; Gapped between the housing of self-damping plate and its both sides.
2. according to casing structure of ultrasonic energy converter claimed in claim 1, it is characterized in that, the self-damping plate is 2~3 groups; The profile of self-damping plate is disc, or the both side surface of self-damping plate is corrugated, or the both sides of self-damping plate are concave shape.
3. according to claim 1 or 2 described casing structure of ultrasonic energy converters, it is characterized in that the inner diameter d of self-damping plate and the ratio=d/D=0.3 of external diameter~0.4; Radius-thickness ratio=d/h=3 of the inner diameter d of self-damping plate and thickness of slab h~4; Self-damping sheet separation δ is 3 times of thickness of slab h.
4. according to casing structure of ultrasonic energy converter claimed in claim 3, it is characterized in that, described corrugated self-damping plate, ripple is than h/H1=1.5~2; Ripple ratio n/(D-d);
D is the internal diameter of damping sheet;
D is the external diameter of damping sheet;
H is corrugated self-damping plate thickness;
H1 is plate thickness and both sides ripple thickness sum;
N is the ripple number.
5. according to casing structure of ultrasonic energy converter claimed in claim 3, it is characterized in that the radius-of-curvature ρ of described concave shape self-damping plate concave surface=50~200.
CN2011101988927A 2011-07-15 2011-07-15 Housing structure of ultrasonic transducer Pending CN102879044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011101988927A CN102879044A (en) 2011-07-15 2011-07-15 Housing structure of ultrasonic transducer

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Application Number Priority Date Filing Date Title
CN2011101988927A CN102879044A (en) 2011-07-15 2011-07-15 Housing structure of ultrasonic transducer

Publications (1)

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CN102879044A true CN102879044A (en) 2013-01-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107306372A (en) * 2016-04-22 2017-10-31 克洛纳有限公司 Ultrasonic transducer with emissive element
EP3699556A1 (en) * 2019-02-22 2020-08-26 OneSubsea IP UK Limited Flowmeter with ribbed transducer housings

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890423A (en) * 1973-07-27 1975-06-17 Nusonics Electroacoustic transducer assembly
CN2149609Y (en) * 1992-12-25 1993-12-15 中国科学院合肥智能机械研究所 Gas medium ultrasonic energy-exchanger
CN1352743A (en) * 1999-05-24 2002-06-05 约瑟夫·鲍莫尔 Transducer for sonic measurement of gal flow and related characteristics
US20100011866A1 (en) * 2008-07-15 2010-01-21 Krohne Ag Ultrasonic transducer
CN202221323U (en) * 2011-07-15 2012-05-16 上海一诺仪表有限公司 Casing structure of ultrasonic energy converter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890423A (en) * 1973-07-27 1975-06-17 Nusonics Electroacoustic transducer assembly
CN2149609Y (en) * 1992-12-25 1993-12-15 中国科学院合肥智能机械研究所 Gas medium ultrasonic energy-exchanger
CN1352743A (en) * 1999-05-24 2002-06-05 约瑟夫·鲍莫尔 Transducer for sonic measurement of gal flow and related characteristics
US20100011866A1 (en) * 2008-07-15 2010-01-21 Krohne Ag Ultrasonic transducer
CN202221323U (en) * 2011-07-15 2012-05-16 上海一诺仪表有限公司 Casing structure of ultrasonic energy converter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
姚耀中等: "《潜艇机械噪声控制技术综述》", 《舰船科学技术》, vol. 29, no. 1, 28 February 2007 (2007-02-28), pages 21 - 26 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107306372A (en) * 2016-04-22 2017-10-31 克洛纳有限公司 Ultrasonic transducer with emissive element
CN107306372B (en) * 2016-04-22 2019-12-10 克洛纳有限公司 Ultrasonic transducer with radiating element
EP3699556A1 (en) * 2019-02-22 2020-08-26 OneSubsea IP UK Limited Flowmeter with ribbed transducer housings

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