CN1346047A - Supersonic transducer - Google Patents
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- CN1346047A CN1346047A CN 00128871 CN00128871A CN1346047A CN 1346047 A CN1346047 A CN 1346047A CN 00128871 CN00128871 CN 00128871 CN 00128871 A CN00128871 A CN 00128871A CN 1346047 A CN1346047 A CN 1346047A
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Abstract
The ultrasonic transducer possesses a top end mass, a tail end mass, a vibration mass and two deformation elements which can be elastically deformed, in which between the top end mass and tail end mass there is a girid connecting member, the vibration mass is placed between the top end mass and tail end mass, one formation element is placed between the top end mass and vibration mass, and another deformation element is placed between the tail end mass and vibration mass, and at least one of them is formed from transducer element capable of producing ultrasonic vibration or receiving ultrasonic vibration.
Description
The present invention relates to a kind of ultrasonic transducer, has a top quality, the deformation element of an end mass, an oscillating mass and two elastically deformables, wherein, between top quality and end mass, have the connecting elements of a rigidity, oscillating mass is located between top quality and the end mass, a deformation element is located between top quality and the oscillating mass, and deformation element is located between end mass and the oscillating mass and in the deformation element at least one and is produced element of transducer ultrasonic vibration or that receive ultrasonic vibration by one and constitute.For example EP 0 209 238A2 disclose a kind of such ultrasonic transducer.
In the past, comprise that the principle of work of the disclosed ultrasonic transducer of EP 0 209 238 A2 generally is based on, the size of ultrasonic transducer changes along a direction in space at least.This can be the length variations of ultrasonic transducer for example.Under the situation as ultrasonic receiver, the ultrasonic vibration that this length variations is passed through to be received is taken place.Under situation as ultrasonic generator, in ultrasonic transducer, have an element of transducer that produces ultrasonic vibration, this element of transducer causes the corresponding length variations of ultrasonic transducer.This ultrasonic generator generally is that the control voltage by a vibration is controlled, make ultrasonic generator finish a kind of and this vibration, be generally proportional, the mechanical vibration of sine-shaped control voltage.The corresponding conversion that controls signal to mechanical vibration by electricity is finished via an element of transducer of mentioning in front, and this element of transducer is for example constituted by a piezoelectric element.And prior art also discloses other element of transducer, such as those convert control signal vibration, electricity the element of transducer of mechanical vibration to by the device based on using magnetic force.
The ultrasonic vibration that is received by ultrasonic transducer by the ultrasonic vibration of ultrasonic transducer generating or under as the situation of ultrasonic receiver under as the situation of ultrasonic generator is sent to by ultrasonic transducer on another object or by this another object and receives, its concrete way is that ultrasonic transducer is fixedlyed connected with this object.For this reason, ultrasonic transducer can for example be with this object welding or be threaded with this object.But, also not necessarily leaveing no choice but to allow ultrasonic transducer directly be fixed on ultrasonic vibration should be by on feed-in this object in it or that ultrasonic vibration should be received.In other words, can stipulate to have the ultrasonic transducer of spacing with this object, wherein, the connecting elements that then to need between ultrasonic transducer and this object be the form of expression with a ultrasound wave conductor.
As previously mentioned, the principle of work of ultrasonic transducer is in the past built on following basis, and promptly in the course of the work, the length of these ultrasonic transducers changes.Should be under the situation on the object in it or that ultrasound wave should be received and be fixed on a ultrasound wave by feed-in at this ultrasonic transducer, by fixing, the mechanical property and the acoustical behavior of ultrasonic transducer change.In other words,, cause strong damping effect and attenuation effect sometimes, make the vibration performance of ultrasonic transducer that huge variation take place by the mechanical fixation of ultrasonic transducer on this object.In order still to be fixed on ultrasonic transducer effectively on the object, therefore, often need take expensive very big resonance coupling and/or impedance matching measure.And this generally means the expense of raising the cost and need expend for a long time when reinstalling this ultrasonic transducer at every turn.
Therefore, task of the present invention is to provide a kind of such ultrasonic transducer, the vibration performance of this ultrasonic transducer is not affected by the arrangement of this ultrasonic transducer on the object of an outside, and requirement of resonance coupling and/or impedance matching requirement are avoided.
Of the present invention, be characterised in that in order to the ultrasonic transducer that solves above task with respect to top quality and end mass, oscillating mass can freely be followed the vibration of the ultrasonic vibration that is produced or received by element of transducer.
Freely follow the ultrasonic vibration that is produced or received by element of transducer for the vibration that can make oscillating mass, requiring not, the masterpiece opposite with the free vibration of oscillating mass is used on the oscillating mass.In view of the above, be that a side and end mass and top quality are for existing the connection of rigidity between the opposing party particularly at oscillating mass.This also produces following result, promptly based on the vibration of following ultrasonic vibration of oscillating mass, does not produce the length variations of ultrasonic transducer generally.This overall length of ultrasonic transducer changes and is certain to be equivalent to the top quality with respect to the move toward one another of end mass or deviate from motion.And by oscillating mass be a side and top quality and end mass between the opposing party only via the coupling of deformation element, the vibration of carrying out based on oscillating mass, there is not to cause the top quality can be applied on top quality or the end mass with respect to the power of the relative motion of end mass, in view of the above, do not cause the length variations of ultrasonic transducer yet.
Now adopted notion " top quality " and " end mass ", but this does not mean that these members must be " heavy especially " quality.In other words, particularly with regard to top quality and end mass, they all are simple plates, and the quality of plate need only be so big, and promptly this plate is enough to use ideally ultrasonic transducer with the stability that this quality was produced under the condition of material and selected shape.Wherein, with regard to material, shape and/or the quality of itself, i.e. weight, end mass can be identical with the top quality, just, under the situation of the principle that can not have influence on invention, end mass also can be different with the top quality.Specifically, by the member as the mutual different structure of end mass or top quality, the vibration performance special, that adapt to the requirement that has nothing in common with each other of ultrasonic transducer can be reached.
Should different layouts can be arranged by on the feed-in object wherein or that ultrasonic vibration should be received for ultrasonic transducer of the present invention being fixed on a ultrasonic vibration.Ultrasonic transducer can be for example mechanically to be fixed on this object by the top quality.Ultrasonic vibration is then received by this object in this object of feed-in or through the top quality through the top quality.But the top quality also can be made of object itself, in this object feed-in by the vibration of ultrasonic transducer generating, perhaps receive by ultrasonic transducer ultrasonic vibration to be received.In view of the above, as if removed the top quality in the ultrasonic transducer on not being fixed on this object as yet, the final assembling of ultrasonic transducer is just finished by the arrangement of ultrasonic transducer on this object that does not have the top quality, and this object self plays the function of top quality subsequently.Last a kind of possibility is, via oscillating mass receiving in this object of ultrasonic vibration feed-in or by this object.For this reason, ultrasonic transducer is fixed on this object by oscillating mass, and the top quality is not connected with this object with end mass.In view of the above, at work, oscillating mass is maintained fixed with respect to this object, and top quality and end mass vibrate with respect to this object.
In principle, can there be stress ground to be provided with fully by the system that is constituted by the oscillating mass of deformation element encompasses, top quality and end mass.And a preferred form of implementation regulation of invention is to be clamped in tightly between top quality and the end mass in advance by the oscillating mass of deformation element encompasses.Specifically, can stipulate that being rigidly connected between top quality and the end mass is made of a bar, along vertically seeing of ultrasonic transducer, this bar is preferably disposed on central authorities.Top quality and end mass then can interconnect in advance tightly by this bar, make be arranged between top quality and the end mass, also be held tightly in advance by the oscillating mass of deformation element encompasses.The top quality with this connection of end mass reach corresponding pretension by prior art, such as the disclosed device of EP 0 209 238 A2 is realized.
As desired according to invention, oscillating mass can freely vibrate, have one above-mentioned, make under the situation of the bar that the top quality links to each other with end mass, realize that the favourable measure of the free vibration of oscillating mass is that oscillating mass is not fixedlyed connected with this bar.And wherein, oscillating mass is possible with contacting of this bar, thereby this contact is equivalent to the sliding contact when oscillating mass vibrates and is essentially oscillating mass play guide effect.Yet, except friction force that occur, little when this leads,, do not have other masterpiece to use on the oscillating mass by connecting link.For this reason, according to a preferred implementing form of invention, stipulate that this bar does not conjointly pass a preferably central hole that is provided with in oscillating mass with oscillating mass.In view of the above, if the diameter in the hole that is provided with in oscillating mass just is a bit larger tham the diameter of bar, then the guide function problem of bar also can be solved.
As previously mentioned, requiring at least one the deformation element in the deformation element is that available its produces element ultrasonic vibration or that ultrasonic vibration can be received.Such deformation element is a so-called activeleg, and second deformation element can be a so-called inert element, this inert element does not have to produce or receive the function of ultrasonic vibration just, thereby but can follow ultrasonic vibration passively and make oscillating mass desired by invention, become possibility with respect to the free vibration of top quality and end mass.Yet,, stipulate that two deformation elements that are located at the opposite side portion of oscillating mass respectively constitute by producing element of transducer ultrasonic vibration or that receive ultrasonic vibration, are activeleg according to a preferred implementing form of the present invention.
In view of the above, for example the symmetrical performance and the efficient of ultrasonic transducer of the present invention all improve.If ultrasonic transducer is a ultrasonic generator, then having under the situation of two activelegs as the deformation element, according to a preferred implementing form of the present invention, the element of transducer of regulation generation ultrasonic vibration can be so controlled, promptly when an element of transducer shortens, another element of transducer is extended simultaneously, and its prolongation amount equals the former shortening amount.In view of the above, oscillating mass by the invention desired, with respect to around, particularly the free vibration with respect to top quality and end mass is ensured simply.Therefore, oscillating mass is according to only to-and-fro movement within ultrasonic transducer of ultrasonic vibration, and this oscillating movement by oscillating mass, top quality and end mass then remain unchanged with regard to its mutual spacing, in other words, top quality and end mass do not carry out causing the relative motion of the length variations generally of ultrasonic transducer each other.
As element of transducer, in fact can adopt all elements that can be used as the ultrasonic transducer inverting element in the prior art.And according to a preferred form of implementation of inventing, regulation produces element of transducer ultrasonic vibration or that receive ultrasonic vibration and is made of piezoelectric element, wherein, a preferred form of implementation regulation, the polarity of the piezoelectric element that has on the polarity of the piezoelectric element that has on the side of oscillating mass and opposite side at oscillating mass is opposite.Thus, it should be noted that above mentioned piezoelectric element is also become by a plurality of single elements combination.Wherein, piezoelectric element for example is made up of piezoelectric ceramics.
If the polarity of the piezoelectric element on the polarity of the piezoelectric element on the side of oscillating mass and opposite side at oscillating mass is opposite, then according to a preferred form of implementation of inventing, regulation has a control electronic system, wherein, two element of transducers that produce ultrasonic vibration are controlled by the control signal that same Be Controlled electronic system produces.In view of the above, can guarantee best that the length variations of the element of transducer that has is accurately suitable mutually on the relative both sides of oscillating mass, and need not control signal is carried out change poles.
As previously mentioned, ultrasonic transducer of the present invention is that an oscillating mass can only be arranged.But such application scenario is arranged, and in these application scenarios, it is favourable adopting a plurality of oscillating mass.Can improve the efficient of ultrasonic transducer specifically in view of the above simply.If regulation has a plurality of oscillating mass, then the basic structure of ultrasonic transducer remains unchanged, in other words, ultrasonic transducer of the present invention is still by mutual rigidly connected top quality and end mass and defines, and regulation has the oscillating mass and the deformation element that are arranged alternately mutually between top quality and end mass.Wherein, for the ultrasonic transducer with a plurality of oscillating mass is worked effectively, preferably each oscillating mass has an activeleg at least as element of transducer on a side, promptly has one and produces element of transducer ultrasonic vibration or that receive ultrasonic vibration.
At last, according to a preferred form of implementation of the present invention, in a ultrasonic transducer with a plurality of oscillating mass, can stipulate, between two oscillating mass, have a fixed mass, the fixed form of this fixed mass is, different with oscillating mass, this fixed mass can not freely be followed ultrasonic vibration.For this reason, advantageously have between such fixed mass and top quality and the end mass mechanical fixation, i.e. connecting elements of rigidity basically, in view of the above, in fact such ultrasonic transducer is divided into a plurality of ultrasonic transducers, and these ultrasonic transducers have at least one oscillating mass respectively.It is evident that,, also can have a plurality of fixed masses according to a preferred form of implementation of the present invention.
Ultrasonic transducer of the present invention has diversified application possibility and particularly can be used for the application scenario of those above-mentioned, traditional employing ultrasonic transducers in various technical field.And according to the performance of its special vibrotechnique aspect, ultrasonic transducer of the present invention is specially adapted to ultrasonic flowmeter, promptly is specially adapted to the ultrasonic flow rate measuring method.
Specifically, existing a lot of possibility of implementing ultrasonic transducer of the present invention.For this reason, referring to dependent claims and the following detailed description of the preferred embodiments of the present invention being carried out by accompanying drawing.Accompanying drawing is depicted as:
The sectional view of a ultrasonic transducer in Fig. 1 a first preferred embodiment of the present invention,
Principle of work synoptic diagram in Fig. 1 b～1d first preferred embodiment of the present invention at the ultrasonic transducer shown in Fig. 1 a,
The sectional view of a ultrasonic transducer in Fig. 2 second preferred embodiment of the present invention and the control device of this ultrasonic transducer,
The fixation case of ultrasonic transducer on an object in Fig. 3 second preferred embodiment of the present invention,
The alternative fixed condition of ultrasonic transducer on an object in Fig. 4 second preferred embodiment of the present invention,
The sectional view and the fixed condition of this ultrasonic transducer on an object of a ultrasonic transducer in Fig. 5 the 3rd preferred embodiment of the present invention,
The sectional view of a ultrasonic transducer in Fig. 6 the 4th preferred embodiment of the present invention,
The arrangement sectional view of ultrasonic transducer on the ultrasound wave conductor of a clavate in Fig. 7 first preferred embodiment of the present invention,
Sectional view in Fig. 8 a the 5th preferred embodiment of the present invention with ultrasonic transducer of a plurality of oscillating mass,
Sectional view in Fig. 8 b the 6th preferred embodiment of the present invention with ultrasonic transducer of a plurality of oscillating mass and a fixed mass.
From Fig. 1 a, can see the sectional view of a ultrasonic transducer in first preferred embodiment of invention.This ultrasonic transducer has a top quality 1 and an end mass 2, and this top quality 1 and end mass 2 longitudinally define ultrasonic transducer.Central authorities between top quality 1 and end mass 2 have an oscillating mass 3.Produce element of transducer 4 ultrasonic vibration or that receive ultrasonic vibration being respectively equipped with between top quality 1 and the oscillating mass 3 and endways one between quality 2 and the oscillating mass 3.Element of transducer 4 is piezoelectric elements, wherein, constitutes an element of transducer 4 by two piezoelectric elements with opposite polarity respectively.In the element of transducer 4 between top quality 1 and oscillating mass 3, piezoelectric element reclines mutually with the face of its positive polarity, and in the element of transducer 4 between end mass 2 and oscillating mass 3, piezoelectric element reclines mutually with the face of its negative polarity.In view of the above, when controlling with same control signal, make an element of transducer 4 by the elongation of predetermined amount and another element of transducer 4 is wherein shortened, its shortening amount is equivalent to the former predetermined elongation.
The arrow of waveform represents that ultrasonic vibration can be sent via the top quality 1 of ultrasonic transducer, for example as shown in Figure 3, is issued in the object 5.Generally, ultrasonic transducer is kept and forms in view of the above the connection of rigidity between top quality 1 and end mass 2 by a bar 6 that is fixed in top quality 1 and the end mass 2.In addition, in ultrasonic transducer, realize pretension, the oscillating mass 3 that is surrounded by element of transducer 4 is clamped between top quality 1 and the end mass 2 in advance tightly by this bar 6.As previously mentioned, top quality 1 and end mass 2 also are interconnective tightly in advance by bar 6.Along vertically seeing of ultrasonic transducer, bar 6 is located at the center of ultrasonic transducer and with under the situation that oscillating mass 3 contacts be not passed in the hole 7 that the center of oscillating mass 3 has.Element of transducer 4 does not directly contact with the bar 6 that passes oscillating mass 3 between two parties yet.In view of the above, oscillating mass 3 can vibrate freely with respect to top quality 1 and end mass 2, in other words, can freely follow the ultrasonic vibration that is produced by element of transducer 4 or received by element of transducer 4.Wherein, do not have to cause the masterpiece with respect to the relative motion of end mass 2 of top quality 1 to use on the top quality 1 and/or end mass 2 of ultrasonic transducer, make the total length of determining to the spacing of end mass 2 by top quality 1 of ultrasonic transducer in the work of ultrasonic transducer, keep constant.In view of the above, as previously mentioned, ultrasonic transducer is arranged to a ultrasonic vibration should be by feed-in resonance coupling on the object 5 in it or that ultrasonic vibration should be received the time require and/or impedance matching requires to be avoided.
From Fig. 1 b to 1d, can see the principle of work synoptic diagram in first preferred embodiment of the present invention at the ultrasonic transducer shown in Fig. 1 a.Fig. 1 b shows a kind of situation, and under this situation, ultrasonic transducer is not loaded, and does not promptly produce or do not receive ultrasonic vibration.And the situation shown in Fig. 1 b also is equivalent to oscillating mass pistolgraph when its equilibrium position in the course of work of ultrasonic transducer.Shown in Fig. 1 c and 1d, the work of ultrasonic transducer is based on, oscillating mass 3 is double vibrations between top quality 1 and end mass 2, wherein, can find out, be coupled via the elasticity of element of transducer 4 with top quality 1 or end mass 2 based on oscillating mass 3, finish the balance of the change in location of oscillating mass 3, in view of the above, based on the vibration of oscillating mass 3, the power that does not have to cause the length of ultrasonic transducer to change on the whole is passed on top quality 1 or the end mass 2.
Fig. 2 schematically shows the control device of a ultrasonic transducer in second preferred embodiment of invention.This ultrasonic transducer has its opposite polarity element of transducer 4 on the both sides of oscillating mass 3.Correspondingly, so finish control to transducer 4 by a control signal that is produced by a control electronic system 8, promptly this control signal is added on the positive pole of two element of transducers 4.The negative pole of element of transducer 4 is a difference ground connection.Because the element of transducer 4 on two both sides that are positioned at oscillating mass 4 is identical structure, so can reach following result, promptly under above-mentioned control, when an element of transducer 4 therein shortens, the element of transducer 4 that wherein another and above-mentioned element of transducer 4 are faced extends to some extent, and its amount of elongation is equivalent to the former shortening amount.By the control of being undertaken by same control signal, two also vibrations definitely in phase of element of transducer 4, generally, the free vibration of oscillating mass 3 between top quality 1 and end mass 2 is achieved, simultaneously, by this free vibration, there is not to cause top quality 1 to be applied on top quality 1 or the end mass 2 again with respect to the power of the relative motion of end mass 2.In view of the above, correspondingly, the total length that the spacing of passing through top quality 1 and end mass 2 of ultrasonic transducer is determined keeps constant in the course of work of ultrasonic transducer.
Fig. 3 shows the fixed condition of the ultrasonic transducer in second preferred embodiment shown in Fig. 2 of the present invention on an object 5, should be by in the feed-in object 5 by the ultrasonic vibration of ultrasonic transducer generating.Ultrasonic transducer rigidly fixing on object 5 is to realize that so promptly a distal process that is equivalent to top quality 1 of bar 6 has external thread 9 for original ultrasonic transducer and on the part that protrudes in ultrasonic transducer of bar 6.Bar 6 is to be screwed in the threaded hole 10 in object 5 by this external thread 9, is assembling under the situation of ultrasonic transducer, and the whole device of being made up of top quality 1, end mass 2, oscillating mass 3 and element of transducer 4 is fixed on the object 5 in advance tightly.Carry out the transition to situation in the object 5 though only schematically show ultrasonic vibration in Fig. 3 by ultrasonic transducer, the ultrasound wave that receives from object 5 also is possible certainly.
Fig. 4 shows the alternative fixed form of ultrasonic transducer on object 5 in second preferred embodiment of the present invention.In this alternative fixed form, ultrasonic transducer is not by top quality 1, but is fixed on the object 5 by oscillating mass 3.For this reason, have a groove 11 in object 5, ultrasonic transducer is encased in this groove 11, oscillating mass 3 is contacted with object 5 with its outer wall at least in part and is fixed by welding on the object 5 in this contact site.Another is possible, but not that alternative fixed form shown in Figure 4 is, making ultrasonic transducer be screwed into corresponding, a internal thread in object 5 and lock this by retainer nut by one at the external thread that processes on the outer wall of oscillating mass 3 is threaded, this is threaded can unclamp in the course of the work.Wherein, the size of the groove 11 in the object 5 makes that in the course of work of ultrasonic transducer the top quality 1 that is positioned within the groove 11 does not contact with object 5.In this fixed form that substitutes, oscillating mass 3 also is freely with respect to top quality 1 and with respect to end mass 2 vibrations.In fact, oscillating mass 3 is fixed on the object 5 naturally, in view of the above, outside object 5, is that top quality 1 and end mass 2 are with respect to object 5 vibrations.
According to the 3rd preferred embodiment of the present invention, the ultrasonic transducer in second preferred embodiment of the present invention has following variation, and itself no longer has top quality 1 promptly original ultrasonic transducer.With regard to other, as shown in Figure 5, the structure of ultrasonic transducer is identical and be fixed in this way on the object 5.The function of top quality 1 is then born by the quality of object 5.In view of the above, saved top quality 1, still, it is bothersome that the assembling of the ultrasonic transducer of only partly making on object 5 becomes.
Fig. 6 shows the ultrasonic transducer in the 4th preferred embodiment of the present invention, in this ultrasonic transducer, top quality 1 has the shape that is essentially truncated cone shape, with regard to the relation of itself and this preferred embodiment, it should be noted that the shape of the function of ultrasonic transducer of the present invention and principle and top quality 1 and size are irrelevant basically.Correspondingly, top quality 1 can be with for the application of the ultrasonic transducer invented and the corresponding requirements that proposes is suitable.For example, the ultrasonic transducer in the 5th of invention the preferred embodiment is fixed on the ultrasound wave conductor 12.This structure can make apart from ultrasonic vibration should be had spacing ground to settle ultrasonic transducer by feed-in object 5 in it or that ultrasonic vibration should be received, under object 5 itself for the work of ultrasonic transducer was overheated or cold excessively condition, it was necessary adopting this structure.
At last, Fig. 8 a and 8b show the ultrasonic transducer in the 5th and the 6th preferred embodiment of the present invention, and these two ultrasonic transducers have a plurality of oscillating mass 3 respectively.In the ultrasonic transducer in the 5th preferred embodiment, have three oscillating mass, in view of the above, compare with having only a ultrasonic transducer oscillating mass, that other structure is identical, the efficient of this ultrasonic transducer improves about twice.In the ultrasonic transducer in the 6th preferred embodiment of invention, have a fixed mass 13, thereby this fixed mass 13 contacts regularly with bar 6 and is connected rigidly with top quality 1 and end mass 2 in central authorities.Between fixed mass 13 and the top quality 1 and between fixed mass 13 and end mass 2, be respectively equipped with an oscillating mass 3, in view of the above, the ultrasonic transducer in the 6th of invention the preferred embodiment be equivalent to basically two tandems, have only the ultrasonic transducer of an oscillating mass respectively.
Claims (16)
1. ultrasonic transducer, has a top quality (1), an end mass (2), the deformation element of an oscillating mass (3) and two elastically deformables, wherein, between top quality (1) and end mass (2), have the connecting elements of a rigidity, oscillating mass (3) is located between top quality (1) and the end mass (2), a deformation element is located between top quality (1) and the oscillating mass (3), deformation element be located between end mass (2) and the oscillating mass (3) and in the deformation element at least one constitute by producing element of transducer (4) ultrasonic vibration or that receive ultrasonic vibration, it is characterized in that, with respect to top quality (1) and end mass (2), oscillating mass (3) can freely be followed the vibration of the ultrasonic vibration that is produced by element of transducer (4) or receive.
2. according to the described ultrasonic transducer of claim 1, it is characterized in that, top quality (1) is made of an object (5), should be fed in the object (5) or ultrasonic vibration to be received should be received by object (5) by ultrasonic transducer by the ultrasonic vibration of ultrasonic transducer generating.
3. according to claim 1 or 2 described ultrasonic transducers, it is characterized in that, is to be clamped in tightly in advance between top quality (1) and the end mass (2) by the oscillating mass of deformation element encompasses (3).
4. according to the described ultrasonic transducer of one of claim 1 to 3, it is characterized in that, between top quality (1) and the end mass (2) be rigidly connected member by one-preferably placed in the middle be provided with-bar (6) constitutes.
5. according to the described ultrasonic transducer of claim 4, it is characterized in that top quality (1) and end mass (2) are interconnective tightly in advance by bar (6).
6. according to claim 4 or 5 described ultrasonic transducers, it is characterized in that oscillating mass (3) is not to be connected with bar (6).
7. according to the described ultrasonic transducer of one of claim 4 to 6, it is characterized in that, bar (6) not with situation that oscillating mass (3) is connected under pass one in oscillating mass (3)-preferably be provided with between two parties-hole (7).
8. according to the described ultrasonic transducer of one of claim 1 to 7, it is characterized in that the deformation element on two opposite sides that lay respectively at oscillating mass (3) constitutes by producing element of transducer (4) ultrasonic vibration or that receive ultrasonic vibration.
9. according to the described ultrasonic transducer of claim 8, it is characterized in that, the element of transducer (4) that produces ultrasonic vibration can be controlled, when a feasible element of transducer (4) therein shortens to some extent, another element of transducer (4) wherein extends to some extent, its amount of elongation is equivalent to the former shortening amount, and vice versa.
10. according to the described ultrasonic transducer of claim 9, it is characterized in that, the element of transducer (4) that produces or receive ultrasonic vibration is made of piezoelectric element, wherein, the polarity of the piezoelectric element on a side of oscillating mass (3) is opposite with the polarity of piezoelectric element on the opposite side of oscillating mass (3).
11. according to the described ultrasonic transducer of one of claim 1 to 10, it is characterized in that, have a control electronic system (8), and two element of transducers (4) that produce ultrasonic vibration are controlled by the same control signal that is produced by control electronic system (8).
12. according to the described ultrasonic transducer of one of claim 1 to 11, it is characterized in that, have a plurality of oscillating mass (3).
13., it is characterized in that it is fixing like this that a fixed mass (13), this fixed mass (13) are arranged, and makes fixed mass (13) can not freely follow ultrasonic vibration according to the described ultrasonic transducer of claim 12 between two oscillating mass (3).
14., it is characterized in that fixed mass (13) is rigidly connected with top quality (1) and end mass (2) according to the described ultrasonic transducer of claim 13.
15. according to claim 13 or 14 described ultrasonic transducers, it is characterized in that, have a plurality of fixed masses (13).
16. the application of the described ultrasonic transducer of one of claim 1 to 15 is used for ultrasonic flowmeter and/or ultrasonic flow rate measuring method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128871 CN1346047A (en) | 2000-09-22 | 2000-09-22 | Supersonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00128871 CN1346047A (en) | 2000-09-22 | 2000-09-22 | Supersonic transducer |
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| Publication Number | Publication Date |
|---|---|
| CN1346047A true CN1346047A (en) | 2002-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00128871 Pending CN1346047A (en) | 2000-09-22 | 2000-09-22 | Supersonic transducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102824999A (en) * | 2012-08-30 | 2012-12-19 | 宁波新芝生物科技股份有限公司 | High-power ultraviolet energy converting subassembly and energy converting device |
| CN109724656A (en) * | 2017-10-27 | 2019-05-07 | 丹尼尔测量和控制公司 | Ultrasonic flowmeter and transducer assemblies |
-
2000
- 2000-09-22 CN CN 00128871 patent/CN1346047A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102824999A (en) * | 2012-08-30 | 2012-12-19 | 宁波新芝生物科技股份有限公司 | High-power ultraviolet energy converting subassembly and energy converting device |
| CN102824999B (en) * | 2012-08-30 | 2015-10-28 | 宁波新芝生物科技股份有限公司 | A kind of high-power ultrasonics transduction assembly and transducer |
| CN109724656A (en) * | 2017-10-27 | 2019-05-07 | 丹尼尔测量和控制公司 | Ultrasonic flowmeter and transducer assemblies |
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