EP0189386A2 - Appareil pour engendrer un son en particulier de basse fréquence - Google Patents

Appareil pour engendrer un son en particulier de basse fréquence Download PDF

Info

Publication number
EP0189386A2
EP0189386A2 EP86850007A EP86850007A EP0189386A2 EP 0189386 A2 EP0189386 A2 EP 0189386A2 EP 86850007 A EP86850007 A EP 86850007A EP 86850007 A EP86850007 A EP 86850007A EP 0189386 A2 EP0189386 A2 EP 0189386A2
Authority
EP
European Patent Office
Prior art keywords
aperture
space
frequency
chamber
drive unit
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
Application number
EP86850007A
Other languages
German (de)
English (en)
Other versions
EP0189386B1 (fr
EP0189386A3 (en
Inventor
Marek Werthajm
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.)
Kockum Sonics AB
Original Assignee
Kockum Sonics AB
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 Kockum Sonics AB filed Critical Kockum Sonics AB
Priority to AT86850007T priority Critical patent/ATE56640T1/de
Publication of EP0189386A2 publication Critical patent/EP0189386A2/fr
Publication of EP0189386A3 publication Critical patent/EP0189386A3/en
Application granted granted Critical
Publication of EP0189386B1 publication Critical patent/EP0189386B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/20—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of a vibrating fluid

Definitions

  • the present invention relates to an apparatus for generating in particular low-frequency sound, comprising a drive unit which is adapted to generate sound by the supply of compressed air, and an open resonator which is connected to said drive unit and preferably is in the form of a straight pipe.
  • the low--frequency generators normally are of the pneumatic type, the frequency generation being integrated with the oscillator (the diaphragm) and the frequency control being integrated with the horn.
  • the sound transmitter is self-adjusting and operates on the system's own resonance frequency, and the frequency cannot be changed.
  • Existing pneumatic sound transmitters with controlled frequency are highly sophisticated.
  • the air supply valve conforms slavishly to changes of optional signals. The control is, so to speak, an "analog" control. Coupling in parallel of such known devices may result in phase shifts reducing the efficiency. It may also happen that entire systems or at least parts thereof are subjected to heavy resonant vibration.
  • the drive unit comprises a housing having a chamber with an aperture opening in the resonator, a member oscillating within said chamber and having a first actuating surface which is located within a first space of said chamber and by means of which said member is movable, by supply of compressed air to said first space, in a direction away from said aperture, such that said aperture is opened, and a second actuating surface which is located in a second space and by means of which said body is movable, by supply of compressed air to said second space, in a direction toward said aperture, such that said aperture is closed, that said second actuating surface has a larger area than said first surface, and that said second space communicates with the atmosphere via a passage which is opened and closed by means of an electrically operated valve.
  • Fig. 1 is a lateral view, partly in section, of an apparatus designed in accordance with the invention and adapted to generate low-frequency sound
  • Fig. 2 illustrates an modified embodiment of such an apparatus
  • Fig. 3 illustrates how a number of apparatuses according to the invention can be coupled in parallel for cleaning the combustion space of a furnace.
  • the apparatus according to the invention as illustrated in Fig. 1 comprises a drive unit generally designated 1 0 and having means for generating low-frequency sound.
  • a resonator 11 Connected to said drive unit 10 is a resonator 11 which may have any shape suitable in the context, for example flaring exponentially, although it preferably is in the form of a straight pipe.
  • the drive unit 10 has a chamber 12 which is connected to the resonator 11 via a duct or aperture 13.
  • the chamber 12 houses an approximately cylindrical member 14 provided at one end with a sealing means 15 which, in Fig. [, as its slightly raised peripheral edge engaging a portion around the aperture 13. Nearest the sealing means 15, the member 14 has a smaller cross-sectional area than the chamber 12, such that a first space 16 is formed. At some distance from the aperture 13, the member 14 widens to the cross-sectional area on the chamber by means of an inclined annular portion 35 forming an actuating surface.
  • the cylindrical member terminates at a distance from the rear end of the chamber 12 to form a second space 17, and it appears that the side of the member 14 facing the space 17 has a much larger area than the transitional portion 35.
  • the member 14 is provided in its rear side with a bore housing a spring 19 which strives to urge the member 14 toward the aperture 13.
  • a duct 18 Extending between said first space 16 and said second space 17 is a duct 18 having a relatively small cross-sectional area and opening in the bore of the member 14.
  • two passages 20, 22 are provided, the first of which extends from the space 17 and opens in a cavity in a valve 21 mounted on said drive unit 10. This cavity of the valve 21 communicates with the atmosphere through the second passage 22.
  • the valve 21 is a solenoid valve having a coil 23 which is connected to a current source by means of wires 24 and within which.
  • an armature 26 is movable back and forth in conventional manner in response to the activation of the coil 23.
  • the armature 26 is connected with a valve member 25 which, in its advanced position, closes the entrance to the passage 22 communicating with the atmosphere. It will be seen that, by displacing the valve member 25, the communication between the space 17 and the atmosphere is opened and closed.
  • the valve 21 is but schematically shown and may be replaced by other valves; the important thing is that the communication between the space 17 and the atmosphere can be opened and closed electrically at the desired frequency.
  • a transverse bore provided in the drive unit 10 and opening in the space 16 houses a connection 27 for connecting a compressed air line 29 to said drive unit 10.
  • Sound is generated by the apparatus according to Fig. 1 by supplying compressed air to the drive unit 10 via the line 29 and the connection 27.
  • the compressed air first enters the space 16 and then goes to the space 17 via the duct 18 and the bore. Since the compressed air acts on a much larger area of the rear side of the member 14 than on the front side of said member, and since this force furthermore is supported by the force of the spring 19, the member 14 will be held with the seal 15 i engagement around the aperture 13, as shown in Fig. 1. If an electric voltage is applied to the coil 23 which thus moves the armature 26 away from the drive unit 10, the valve member 25 is lifted from its seat surface, thereby exposing the opening of the passage 22 in the valve cavity so that the space 17 will communicate with the atmosphere via the passages 20, 22.
  • the pressure in the space 17 is reduced, and by the action of the compressed air on the actuating surface 35 the member 14 is moved to the right in Fig. 1, whereby the aperture 13 is opened toward the chamber 12.
  • the valve member 25 again closes the passage 22, the pressure in the space 17 is again built up so that the member 14 is moved to the left in Fig. 1 and the aperture 13 is closed.
  • This movement of the member 14 in the drive unit 10 generates the low-frequency sound which is amplified by the resonator 11.
  • the reciprocating movement of the member 14 is controlled by means of the valve member 25 whose movement is dependent upon the movement of the armature 26 and, thus, by the activation of the coil 23.
  • the movement of the member 14 and thus the frequency of the sound generated may be readily controlled electrically by connecting the lines 24 of the coil 23 to a suitable current source which is capable of supplying pulses of a frequency readily adjustable, preferably a square wave voltage.
  • Fig. 2 illustrates a modified embodiment of the drive unit, a diaphragm 1 4 forming the reciprocable member.
  • an annular ridge 28 is provided around the aperture 13 to the resonator 11, and this ridge is engaged by one side of the diaphragm 14 in the state corresponding to the one shown in Fig. 1.
  • the space 16 is formed by the annular space between the ridge 28 and the periphery of the diaphragm 14, and the space 16 communicates with the space 14 on the rear side of the diaphragm 14 via the duct 18 which here is formed in the diaphragm proper.
  • the diaphragm 14 is mounted such that it engages the ridge without actuation by compressed air, and when compressed air is supplied via the passage 29 and the connection 27, the air will flow, as in the embodiment previously described, into the space 16 and from there via the duct 18 into the space 17 which is vented in the same manner as in the earlier embodiment, the diaphragm 1 4 being urged away from the ridge 28 by the compressed air in the space 16.
  • the resonator preferably is a straight pipe 11 because this will give a resonance curve having a relatively wide peak.
  • lf on the other hand, the hom flares exponentially or in accordance with a Bessel curve, the degree of efficiency will be affected, and the resonance curve will be far more narrow.
  • the resonance frequency is determined by the length of the horn. With low frequencies, the horns must be of considerable lengths and therefore may be curved, for example helically. For optimation of the horns at low frequencies, the horns may also comprise several different sections, such as straight pipes with conical sections.
  • FIG. 3 illustrates an arrangement in which a combustion chamber 30 in a boiler is cleaned by means of several apparatuses according to the invention coupled in parallel and provided with a resonator 11 in the form of a long straight pipe projecting into the space 30 with its end facing away from the drive unit 10.
  • the drive units 10 of the apparatuses are connected to a compressed air line 29 and to a control wire 24 which is connected to a current source 31.
  • the current source 31 produces a square wave. voltage of readily controlled frequency, as indicated at 32. It is also possible to provide on a resonator 11 a sensor 34 which senses the resonance frequency of the resonator and is connected, via a wire 33, to the current source 31 for automatic control of the frequency of the square wave voltage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Exhaust Silencers (AREA)
  • Electrophonic Musical Instruments (AREA)
EP86850007A 1985-01-16 1986-01-15 Appareil pour engendrer un son en particulier de basse fréquence Expired - Lifetime EP0189386B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86850007T ATE56640T1 (de) 1985-01-16 1986-01-15 Geraet zum erzeugen insbesondere niederfrequenter schallschwingungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8500188A SE451115B (sv) 1985-01-16 1985-01-16 Anleggning for sotning av pannor eller liknande, innefattande ett flertal lagfrekvent ljud alstrande anordningar
SE8500188 1985-01-16

Publications (3)

Publication Number Publication Date
EP0189386A2 true EP0189386A2 (fr) 1986-07-30
EP0189386A3 EP0189386A3 (en) 1987-11-19
EP0189386B1 EP0189386B1 (fr) 1990-09-19

Family

ID=20358780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86850007A Expired - Lifetime EP0189386B1 (fr) 1985-01-16 1986-01-15 Appareil pour engendrer un son en particulier de basse fréquence

Country Status (5)

Country Link
EP (1) EP0189386B1 (fr)
AT (1) ATE56640T1 (fr)
DE (1) DE3674219D1 (fr)
SE (1) SE451115B (fr)
WO (1) WO1987004953A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692500A1 (fr) 1994-07-14 1996-01-17 Union Carbide Chemicals & Plastics Technology Corporation Procédé de polymérisation en lit fluidisé d'oléfines utilisant des ondes accoustiques
FR2757784A1 (fr) * 1996-12-27 1998-07-03 Bp Chemicals Snc Procede de traitement au moyen de vibrations de la paroi d'un reacteur a lit fluidise de polymerisation en phase gazeuse
US9443505B2 (en) 2013-08-16 2016-09-13 Kevin Allan Dooley, Inc. Systems and methods for control of infrasound pressures
US10048151B2 (en) 2013-08-16 2018-08-14 Kevin Allan Dooley, Inc. Systems and methods for control of motion sickness within a moving structure due to infrasound pressures

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022039A (en) * 1958-12-22 1962-02-20 Gates Rubber Co Diaphragm for valve
EP0006833A2 (fr) * 1978-07-03 1980-01-09 Mats Olsson Konsult Ab Générateur de sons basse fréquence
WO1980002887A1 (fr) * 1979-06-11 1980-12-24 Kockumation Ab Amelioration aux generateurs d'oscillations de pression actionnes par un gaz, du type a soupape a diaphragme
WO1981000064A1 (fr) * 1979-07-03 1981-01-22 Kockumation Ab Generateur d'impulsions pneumatique a diaphragme
EP0045292A2 (fr) * 1980-07-25 1982-02-03 Kockumation Ab Générateur pour produire des vibrations au moyen de la pression d'un fluide

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191109364A (en) * 1910-04-18 1912-01-11 Etablissements Gaumont An Improved Fluid Pressure Relay for Amplifying Sounds.
FR774990A (fr) * 1934-05-04 1934-12-17 Avertisseur sonore
US3053031A (en) * 1959-10-19 1962-09-11 Pangborn Corp Sonic cleaning of dust filters
DE1407922B2 (de) * 1963-11-18 1973-08-16 Gebruder Buhler AG, Uzwil (Schweiz) Filteranlage fuer die staubabscheidung aus luft
FR1443257A (fr) * 1965-05-07 1966-06-24 Perfectionnements aux vannes
US3917233A (en) * 1973-08-24 1975-11-04 Sherwin Williams Co Vibrator
SE391458B (sv) * 1974-05-02 1977-02-21 Svenska Flaektfabriken Ab Sett och anordning for att rensa slangfilter med tryckpulser av rensmedium
US4120699A (en) * 1974-11-07 1978-10-17 Alvin B. Kennedy, Jr. Method for acoustical cleaning
CH592466A5 (fr) * 1975-05-05 1977-10-31 Buehler Ag Geb
CH625969A5 (fr) * 1977-07-15 1981-10-30 Buehler Ag Geb
SE7805006L (sv) * 1978-05-02 1979-11-03 Kockums Automation Sett vid sonikrensning
DE3025548A1 (de) * 1980-07-05 1982-01-21 Degussa Ag, 6000 Frankfurt Verfahren zur abreinigung von filtertuechern mittels druckgas-impuls bei der feststoffabscheidung aus gasen
SE425597B (sv) * 1980-10-13 1982-10-18 Ekstroms Vermetekniska Ab Tvangsstyrd ljudalstrare for infraljudomradet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022039A (en) * 1958-12-22 1962-02-20 Gates Rubber Co Diaphragm for valve
EP0006833A2 (fr) * 1978-07-03 1980-01-09 Mats Olsson Konsult Ab Générateur de sons basse fréquence
WO1980002887A1 (fr) * 1979-06-11 1980-12-24 Kockumation Ab Amelioration aux generateurs d'oscillations de pression actionnes par un gaz, du type a soupape a diaphragme
WO1981000064A1 (fr) * 1979-07-03 1981-01-22 Kockumation Ab Generateur d'impulsions pneumatique a diaphragme
EP0045292A2 (fr) * 1980-07-25 1982-02-03 Kockumation Ab Générateur pour produire des vibrations au moyen de la pression d'un fluide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
AUFBEREITUNGS-TECHNIK, vol. 17, no. 12, 1976, pages 636-637, DE; O. ALBRECHT: "Sch}ttgut-R}ttelung mittels pneumatischer Druckwellen" *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692500A1 (fr) 1994-07-14 1996-01-17 Union Carbide Chemicals & Plastics Technology Corporation Procédé de polymérisation en lit fluidisé d'oléfines utilisant des ondes accoustiques
FR2757784A1 (fr) * 1996-12-27 1998-07-03 Bp Chemicals Snc Procede de traitement au moyen de vibrations de la paroi d'un reacteur a lit fluidise de polymerisation en phase gazeuse
WO1998029186A1 (fr) * 1996-12-27 1998-07-09 Bp Chemicals Limited Procede servant a traiter la paroi d'un reacteur au moyen de vibrations
US9443505B2 (en) 2013-08-16 2016-09-13 Kevin Allan Dooley, Inc. Systems and methods for control of infrasound pressures
US10048151B2 (en) 2013-08-16 2018-08-14 Kevin Allan Dooley, Inc. Systems and methods for control of motion sickness within a moving structure due to infrasound pressures

Also Published As

Publication number Publication date
SE8500188D0 (sv) 1985-01-16
EP0189386B1 (fr) 1990-09-19
EP0189386A3 (en) 1987-11-19
SE451115B (sv) 1987-09-07
SE8500188L (sv) 1986-07-17
DE3674219D1 (de) 1990-10-25
ATE56640T1 (de) 1990-10-15
WO1987004953A1 (fr) 1987-08-27

Similar Documents

Publication Publication Date Title
EP0006833B1 (fr) Générateur de sons basse fréquence
US5145355A (en) Apparatus for active monitoring of combustion instability
US5593134A (en) Magnetically assisted piezo-electric valve actuator
EP0189386B1 (fr) Appareil pour engendrer un son en particulier de basse fréquence
DK155971B (da) Fremgangsmaade til at styre en stoevsuger eller en central stoevsuger
WO1993021613A1 (fr) Avertisseur de vehicule a reglage automatique
KR19980047158A (ko) 가변형 흡기 리조네이터 구조
EP0389860A2 (fr) Klaxon contrôlé électroniquement pour véhicules à moteur
CA2293076A1 (fr) Attenuation du bruit d'un turboreacteur a souflante
WO1982001329A1 (fr) Emmetteur sonore excite par un gaz sous pression
US5005511A (en) Air-driven low-frequency sound generator with positive feedback system
JPH04224305A (ja) ガス圧アクチュエータ
KR930008517B1 (ko) 정압비례 밸브의 제어장치
US4803501A (en) Device for generating fluid drops
GB2165062A (en) Optically controlled actuator
USRE36584E (en) Method for controlling a vacuum cleaner or a central vacuum cleaner
JPS6235179A (ja) 流量制御装置
US3549117A (en) Vibration controlled valve and system
US2191825A (en) Electropneumatic signal device
GB2150731A (en) Air powered sound source
CN220205778U (zh) 一种声波清灰装置
US20020118601A1 (en) Variable frequency sound generator
US2101385A (en) Air horn
EP2578935A2 (fr) Procédé et systèmes de nettoyage par ondes acoustiques
WO1996026378A1 (fr) Actuateur de soupape piezo-electrique a assistance magnetique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19880518

17Q First examination report despatched

Effective date: 19891128

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KOCKUM SONICS AKTIEBOLAG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19900919

Ref country code: CH

Effective date: 19900919

Ref country code: AT

Effective date: 19900919

REF Corresponds to:

Ref document number: 56640

Country of ref document: AT

Date of ref document: 19901015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3674219

Country of ref document: DE

Date of ref document: 19901025

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19910131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930131

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940801

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
EAL Se: european patent in force in sweden

Ref document number: 86850007.5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970131

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980131

BERE Be: lapsed

Owner name: KOCKUM SONICS A.B.

Effective date: 19980131

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990107

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19991216

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000107

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010115

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20010115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010928

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20040119

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050116

EUG Se: european patent has lapsed