FR2528727A1 - Ultrasonic emitter with piezoelectric elements - has plates between metallic blocks of different mass and perpendicular bolt with one end in emission surface - Google Patents
Ultrasonic emitter with piezoelectric elements - has plates between metallic blocks of different mass and perpendicular bolt with one end in emission surface Download PDFInfo
- Publication number
- FR2528727A1 FR2528727A1 FR8210503A FR8210503A FR2528727A1 FR 2528727 A1 FR2528727 A1 FR 2528727A1 FR 8210503 A FR8210503 A FR 8210503A FR 8210503 A FR8210503 A FR 8210503A FR 2528727 A1 FR2528727 A1 FR 2528727A1
- Authority
- FR
- France
- Prior art keywords
- bolt
- stack
- emission face
- mass
- bar
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 abstract description 4
- 229910001234 light alloy Inorganic materials 0.000 abstract description 4
- 230000001954 sterilising effect Effects 0.000 abstract description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011777 magnesium Substances 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 238000002604 ultrasonography Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0611—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile
- B06B1/0618—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile of piezo- and non-piezoelectric elements, e.g. 'Tonpilz'
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
Description
Dinnositif 4metteur d'ultrasons. Positive 4 ultrasonic transmitter.
On sait transmettre, dans un milieu liquide par exemple, des vibrations ultrasonores en fixant å la paroi du récipient contenant ce milieu un émetteur ou transducteur d'ultrasons constitué par une ou plusieurs plaques piezoélectriques comprises entre deux masses métalliques différentes, l'une des masses comprenant la face d'émission collée audit récipient, et excitées au moyen d'un courant électrique de fréquence déterminée en rapport avec la fréquence de l'ensemble. We know how to transmit, in a liquid medium for example, ultrasonic vibrations by fixing to the wall of the container containing this medium an ultrasonic transmitter or transducer constituted by one or more piezoelectric plates comprised between two different metallic masses, one of the masses comprising the emission face bonded to said container, and excited by means of an electric current of frequency determined in relation to the frequency of the assembly.
Il peut etre intéressant de disposer d'un émetteur d'ultrasons engendrant, dans une plage de puissance significative pour chacune d'elles, une pluralité de - donc au moins deux - fréquences. On axait en effet que lorsque ces ondes ultrasonores sont utilisées 9 des fins de nettoyage d'objets immergés dans le liquide, elles sont la cause d'un phénomène de cavitation dont l'action est très dépendante de la fréquence. Jusqu'à présent pour obtenir des fréquences différentes, on met en oeuvre des émetteurs de caracté tqties différentes, dont il faut assurer ensuite le réglage pour tenter d'approcher le rendement optimal. It may be advantageous to have an ultrasound transmitter generating, in a significant power range for each of them, a plurality of - therefore at least two - frequencies. It was indeed focused that when these ultrasonic waves are used for the purpose of cleaning objects immersed in the liquid, they are the cause of a cavitation phenomenon whose action is very dependent on the frequency. Until now, in order to obtain different frequencies, transmitters of different characteristics have been used, the adjustment of which must then be ensured in order to attempt to approach the optimum efficiency.
L'invention entend proposer un dispositif émetteur de plusieurs fréquences d'ondes ultrasonores dont deux au mats sont émiseedansune gamme de puissance significative en fonction de la puissance daLimentation. The invention intends to propose a device emitting several frequencies of ultrasonic waves, two of which at the mast are emitted in a significant power range as a function of the power of the power supply.
Plus précisément, l'invention a donc pour objet un dispositif émetteur d'ultrasons constitué par au moins une plaquette piézoélectrique placée entre deux blocs métalliques de masses différentes dont celui de faible masse possède la face d'émission. More specifically, the invention therefore relates to an ultrasonic emitting device consisting of at least one piezoelectric plate placed between two metal blocks of different masses, of which the low mass has the emission face.
Selon l'une des caractéristiques principales de l'invention, il comporte au moins un barreau perpendiculaire audit empilage dont une extrémité est contenue dans la face d'émission et qui est fermement assujetti audit empilage par des surfaces perpendiculaires sa longueur. According to one of the main characteristics of the invention, it comprises at least one bar perpendicular to said stack, one end of which is contained in the emission face and which is firmly secured to said stack by surfaces perpendicular to its length.
Dans un mode de réalisation préféré, ledit barreau est constitué par un boulon qui peut constituer le moyen d'assemblage et de précontrainte de l'empilage susdit. In a preferred embodiment, said bar is constituted by a bolt which can constitute the means of assembly and prestressing of the above-mentioned stack.
On peut orienter le boulon de manière que sa tête soit telle qu'elle ait sa surface dans la face d'émission susdite ou que la tete de ce boulon soit située du coté du bloc métallique de masse la plus importante. The bolt can be oriented so that its head is such that it has its surface in the above-mentioned emission face or that the head of this bolt is located on the side of the metal block with the largest mass.
Enfin dans un autre mode de réalisation le barreau susdit est en une seule pièce avec le bloc métallique de grande masse. Finally in another embodiment the aforementioned bar is in one piece with the metal block of large mass.
L'invention sera mieux comprise au cours de la description donnée ci-après titre d'exemple purement indicatif et non limitatif qui permettra d'en dégager les avantages et les caractéristiques secondaires. The invention will be better understood during the description given below by way of purely indicative and non-limiting example which will make it possible to identify the advantages and the secondary characteristics thereof.
Il sera fait référence aux dessins annexés dans lesquels
- la figure 1 illustre un premier mode de réalisation de l'invention;
- la figure 2 illustre une variante de réalisation de la figure 1.Reference will be made to the accompanying drawings in which
- Figure 1 illustrates a first embodiment of the invention;
- Figure 2 illustrates an alternative embodiment of Figure 1.
En se reportant à ces figures, on voit un émetteur d'ondes ultrasonores constitué par un élément piézoélectrique (représenté ici sous la forme de deux plaquettes la et lb). Ces plaquettes sont en contact intime par deux faces parallèles avec deux éléments niétalliques de masse différente 2 et 3. L'élément 2 peut etre en alliage léger d'aluminium ou de magnésium alors que l'élément 3 est un bloc d'acier de masse nettement plus importante que la masse de l'élément d'alliage léger. L'ensemble la, lb 2 et 3 est maintenu soit par collage et sous une certaine précontrainte, soit au moyen d'éléments de liaison de l'empilage qui peuvent Entre constitués par des vis traversant les eléments la lb et 3 et vissées dans l'élément 2.Ces vis ne sont pas représentées sur le dessin. Referring to these figures, we see an ultrasonic wave emitter constituted by a piezoelectric element (shown here in the form of two plates 1a and 1b). These plates are in intimate contact by two parallel faces with two nietallic elements of different mass 2 and 3. Element 2 can be made of a light alloy of aluminum or magnesium while element 3 is a block of steel of mass significantly greater than the mass of the light alloy element. The assembly 1a, 2b and 3 is maintained either by gluing and under a certain prestress, or by means of connecting elements of the stack which can be constituted by screws passing through the elements 1b and 3 and screwed into the element 2.These screws are not shown in the drawing.
En revanche, le boulon représenté en 4 sur les figures est avant tout un barreau métallique qui est fermement assujetti l'empilage susdit au moyen de faces d'appui 4a et 4b perpendiculaires son axe. Avantageusement, ce barreau peut sous forme de boulon, constituer le moyen de maintien de l'empilage soit en substitution aux vis susdites, soit en complément de ces vis. Les figures représentent un seul barreau central, mais l'invention s'étend aux dispositifs comprenant une pluralité de barreaux, régulièrement répartis a la périphérie de l'emetteur, ou disposés de toute autre manière convenable, que ces barreaux participent ou non au maintien de l'empilage. On the other hand, the bolt shown at 4 in the figures is above all a metal bar which is firmly secured to the above-mentioned stack by means of bearing faces 4a and 4b perpendicular to its axis. Advantageously, this bar can, in the form of a bolt, constitute the means for holding the stack either as a replacement for the aforementioned screws, or in addition to these screws. The figures represent a single central bar, but the invention extends to devices comprising a plurality of bars, regularly distributed around the periphery of the transmitter, or arranged in any other suitable manner, whether or not these bars participate in the maintenance of stacking.
Dans le cas de la figure 1, l'écrou 5 du boulon 4 est situé du côté de la face 2a d'émission de l'appareil, c'est-à-dire la face de la masse la moins importante. On s'arrangera pour que sa face extrême 5a soit contenue dans cette face 2a (dans le cas de figure,coplanaire) de manière que la face Sa constitue une face d'émission du barreau 4. En jouant sur la longueur utile du barreau 4, sur son matériau, sur la masse de la tette 6 opposée à la face 5a,on peut, pour excitation donnée des éléments piézoélectriques, obtenir une émission ultrasonore par la face Sa de fréquence plus élevée que celle emise par la face 2a et avec une fraction sensible de la puissance totale d'émission. In the case of FIG. 1, the nut 5 of the bolt 4 is situated on the side of the emission face 2a of the device, that is to say the face of the least significant mass. We will arrange for its end face 5a to be contained in this face 2a (in the case of figure, coplanar) so that the face Sa constitutes an emission face of the bar 4. By playing on the useful length of the bar 4 , on its material, on the mass of the plate 6 opposite the face 5a, it is possible, for given excitation of the piezoelectric elements, to obtain an ultrasonic emission by the face Sa of frequency higher than that emitted by the face 2a and with a substantial fraction of the total transmission power.
Dans le cas de la figure 2, on voit que c'est la tete 6 du boulon 4 qui est noyée dans le bloc 2 de masse plus faible. La vis peut donc dépasser de l'écrou 5 d'une longueur dont l'importance peut être réglée en fonction de l'équilibre vibratoire que l'on veut obtenir. Dans ce cas de figure, c'estsla face 6a de la tette 6 qui constitue la face d'émission du barreau 4. In the case of Figure 2, we see that it is the head 6 of the bolt 4 which is embedded in the block 2 of lower mass. The screw can therefore protrude from the nut 5 by a length, the importance of which can be adjusted as a function of the vibrational balance which it is desired to obtain. In this case, it is the face 6a of the strip 6 which constitutes the emission face of the bar 4.
L'émetteur selon l'invention est fixé à une paroi de récipient par sa face 2a, Sa - ou 2a 6a à laquelle il transmet ses vibrations. Le réglage et la mise au point sont réalisés de manière expérimentale. On peut citer à titre d'exemple que, dans une application de l'invention au nettoyage et à la stérilisation par effets conjugués ultrasons et rayonnement,on on produit des ondes ultrasonores de 35 à 70 kHz avec une pointe d'énergie autour de la fréquence d'excitation (environ 40 kHz) et une autre autour de 70 kHz au niveau du barreau. The transmitter according to the invention is fixed to a container wall by its face 2a, Sa - or 2a 6a to which it transmits its vibrations. Adjustment and focusing are carried out experimentally. By way of example, it may be mentioned that, in an application of the invention to cleaning and sterilization by combined effects of ultrasound and radiation, ultrasonic waves of 35 to 70 kHz are produced with a peak of energy around the excitation frequency (around 40 kHz) and another around 70 kHz at the level of the bar.
L'invention s'étend également a une réalisation non représentée dans laquelle la vis du boulon 4 et l'élément 3 de forte masse sont en une seule pièce. The invention also extends to an embodiment not shown in which the bolt screw 4 and the element 3 of high mass are in one piece.
L'invention trouve une application intéressante dans le domine de l'application des ultrasons notamment au nettoyage et & la stérilisation. The invention finds an interesting application in the field of the application of ultrasound, in particular for cleaning and sterilization.
Elle n'est pas limitée à la description qui vient d'en être donnée mais couvre au contraire toutes les variantes qui pourraient lui être apportées sans sortir de son cadre ni de son esprit. It is not limited to the description which has just been given, but on the contrary covers all the variants which could be made to it without departing from its scope or its spirit.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8210503A FR2528727A1 (en) | 1982-06-16 | 1982-06-16 | Ultrasonic emitter with piezoelectric elements - has plates between metallic blocks of different mass and perpendicular bolt with one end in emission surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8210503A FR2528727A1 (en) | 1982-06-16 | 1982-06-16 | Ultrasonic emitter with piezoelectric elements - has plates between metallic blocks of different mass and perpendicular bolt with one end in emission surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2528727A1 true FR2528727A1 (en) | 1983-12-23 |
| FR2528727B1 FR2528727B1 (en) | 1985-02-22 |
Family
ID=9275060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8210503A Granted FR2528727A1 (en) | 1982-06-16 | 1982-06-16 | Ultrasonic emitter with piezoelectric elements - has plates between metallic blocks of different mass and perpendicular bolt with one end in emission surface |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2528727A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0369572A2 (en) * | 1988-11-14 | 1990-05-23 | Russell Finex Limited | Sieving apparatus |
| FR2713429A1 (en) * | 1993-12-03 | 1995-06-09 | France Etat Armement | Method for transmitting high power acoustic waves and corresponding transducer horns |
-
1982
- 1982-06-16 FR FR8210503A patent/FR2528727A1/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0369572A2 (en) * | 1988-11-14 | 1990-05-23 | Russell Finex Limited | Sieving apparatus |
| EP0369572A3 (en) * | 1988-11-14 | 1991-08-07 | Russell Finex Limited | Sieving apparatus |
| US5143222A (en) * | 1988-11-14 | 1992-09-01 | Russell Finex Limited | Sieving apparatus |
| FR2713429A1 (en) * | 1993-12-03 | 1995-06-09 | France Etat Armement | Method for transmitting high power acoustic waves and corresponding transducer horns |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2528727B1 (en) | 1985-02-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |