GB1430227A - Transducers - Google Patents
TransducersInfo
- Publication number
- GB1430227A GB1430227A GB4749075A GB4749075A GB1430227A GB 1430227 A GB1430227 A GB 1430227A GB 4749075 A GB4749075 A GB 4749075A GB 4749075 A GB4749075 A GB 4749075A GB 1430227 A GB1430227 A GB 1430227A
- Authority
- GB
- United Kingdom
- Prior art keywords
- elements
- admittance
- electrostrictive
- clamped
- transducer
- 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.)
- Expired
Links
- 239000012212 insulator Substances 0.000 abstract 5
- 239000002184 metal Substances 0.000 abstract 4
- 229910052751 metal Inorganic materials 0.000 abstract 4
- 238000004804 winding Methods 0.000 abstract 3
- LTPBRCUWZOMYOC-UHFFFAOYSA-N Beryllium oxide Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 abstract 2
- 229910052573 porcelain Inorganic materials 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 239000011889 copper foil Substances 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 abstract 1
- 229920000647 polyepoxide Polymers 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/10—Resonant transducers, i.e. adapted to produce maximum output at a predetermined 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
- B06B1/0644—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 a single piezoelectric element
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
- H04R17/08—Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
1430227 Piezoelectric devices TAGA ELECTRIC CO Ltd 7 March 1973 47490/75 Divided out of 1429856 Heading H4J A transducer arrangement has two electrostrictive elements 60, 61 (Fig. 3) which, when the transducer arrangement is energized at its fundamental resonant frequency, are located at positions of different mechanical stress along the axial direction of the transducer arrangement. The ratio of motional admittance to clamped admittance for the first electrostrictive element is different from the ratio of motional admittance to clamped admittance for the second electrostrictive element. An output signal responsive to motional current which flows through the motional admittance of the transducer is obtained, and this output signal is a difference signal of the two electrostrictive regions, so that the clamped current components flowing through the clamped admittance of the first and second regions cancel each other out. A horn has a smaller diameter cylindrical portion 75, an exponential portion 76 and a larger diameter cylindrical portion 77. A metal body 78 and the portion 77 are held together by a bolt 79 and sandwich between them electrostrictive elements 60, 61 an insulator 64 and electrode plates 62, 63. A differential current transformer 80 has an intermediate tap 82 on primary winding 81 and is connected to one electrode of an energizing power supply 83. The ends of winding 81 are connected to electrode plates 62 and 63 of the transducer. The other electrode of the power supply 83 is connected to metallic body 78. A load 85 connected to the secondary winding 84 permits a signal proportional to the vibrating speed to be obtained. The elements 60, 61 are displaced from a node at the fundamental resonance frequency and the stresses in the elements 60, 61 differ, when the transducer is energized at this frequency, to provide the signal proportional to vibrating speed. In another arrangement (Fig. 1) lead zirconate-lead titanate elements 60, 61 are separated by a resilient insulator 64 interposed between two electrode plates 62, 63. A cylincrical metal body 66 having a bolt 65 and metal body 67 clamp the elements 60, 61 by a washer 68 and nut 69. The ratio of motional admittance to clamped admittance for one element differs from that of the other element. Electrodes 62, 63 are connected to one terminal of the energizing power supply and the metal bodies 66, 67 contacting the other surfaces of the elements 60, 61 are connected to the other terminal of the energizing power supply. The difference between the exciting currents flowing into elements 60, 61 is applied to a bridge circuit or differential current transformer to provide a signal proportional to vibrating speed. Insulator 64 is a thin film of alumina porcelain, beryllia porcelain, or epoxy resin containing copper foil with glass fibre on both surfaces. The resilient insulator 64 may be omitted provided the bolt 65 and body 67 are insulated and there is a single electrode between the elements 60, 61. An alternative arrangement (Fig. 2, not shown) omits the insulator 64 but has four electrostrictive elements arranged so that the polarizing direction of alternate elements is reversed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4749075A GB1430227A (en) | 1973-03-07 | 1973-03-07 | Transducers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1121573A GB1429856A (en) | 1973-03-07 | 1973-03-07 | Transducers |
GB4749075A GB1430227A (en) | 1973-03-07 | 1973-03-07 | Transducers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1430227A true GB1430227A (en) | 1976-03-31 |
Family
ID=26248144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4749075A Expired GB1430227A (en) | 1973-03-07 | 1973-03-07 | Transducers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1430227A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2914434A1 (en) * | 1978-06-26 | 1980-01-03 | Sp Pk T B Malykh Elek Mash Pro | ROD ULTRASONIC VIBRATION SYSTEM |
US5032754A (en) * | 1989-03-31 | 1991-07-16 | Brother Kogyo Kabushiki Kaisha | Piezoelectric transducer for an ultrasonic motor |
DE4421465A1 (en) * | 1994-06-20 | 1995-12-21 | Vaupel Textilmasch | Ultrasonic welding and cutting tool for fabrics |
DE10040344A1 (en) * | 2000-08-17 | 2002-02-28 | Sick Ag | ultrasound transducer |
WO2012152585A1 (en) * | 2011-05-11 | 2012-11-15 | Robert Bosch Gmbh | Hand-guided power tool with an excitation actuator that is capable of vibrating |
-
1973
- 1973-03-07 GB GB4749075A patent/GB1430227A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2914434A1 (en) * | 1978-06-26 | 1980-01-03 | Sp Pk T B Malykh Elek Mash Pro | ROD ULTRASONIC VIBRATION SYSTEM |
US5032754A (en) * | 1989-03-31 | 1991-07-16 | Brother Kogyo Kabushiki Kaisha | Piezoelectric transducer for an ultrasonic motor |
DE4421465A1 (en) * | 1994-06-20 | 1995-12-21 | Vaupel Textilmasch | Ultrasonic welding and cutting tool for fabrics |
DE10040344A1 (en) * | 2000-08-17 | 2002-02-28 | Sick Ag | ultrasound transducer |
US6570295B2 (en) | 2000-08-17 | 2003-05-27 | Sick Ag | Ultrasound converter |
WO2012152585A1 (en) * | 2011-05-11 | 2012-11-15 | Robert Bosch Gmbh | Hand-guided power tool with an excitation actuator that is capable of vibrating |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |