GB1249628A - Improvements in or relating to ultrasonic pulse-echo systems - Google Patents
Improvements in or relating to ultrasonic pulse-echo systemsInfo
- Publication number
- GB1249628A GB1249628A GB190668A GB190668A GB1249628A GB 1249628 A GB1249628 A GB 1249628A GB 190668 A GB190668 A GB 190668A GB 190668 A GB190668 A GB 190668A GB 1249628 A GB1249628 A GB 1249628A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transducer
- plate
- thickness
- probes
- delay
- 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
- 239000000523 sample Substances 0.000 abstract 6
- 229910052751 metal Inorganic materials 0.000 abstract 4
- 239000002184 metal Substances 0.000 abstract 4
- 239000004033 plastic Substances 0.000 abstract 3
- 229920003023 plastic Polymers 0.000 abstract 3
- 229920005989 resin Polymers 0.000 abstract 2
- 239000011347 resin Substances 0.000 abstract 2
- 241000251468 Actinopterygii Species 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 230000001066 destructive effect Effects 0.000 abstract 1
- 238000005538 encapsulation Methods 0.000 abstract 1
- 239000011888 foil Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- 239000002023 wood Substances 0.000 abstract 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
- 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
- B06B1/0662—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 with an electrode on the sensitive surface
- B06B1/0681—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 with an electrode on the sensitive surface and a damping structure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/521—Constructional features
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
Abstract
1,249,628. Ultrasonic probes. J. SZILARD. 8 Jan., 1969 [12 Jan., 1968], No. 1906/68. Headings H4D and H4J. . Signal prolongation due to ringing of an ultrasonic transmitting or receiving transducer is suppressed by allowing part of the acoustic energy in the transducer to pass through an acoustic delay member and return to the transducer to cause destructive interference. This permits good range resolution and sensitivity in an ultrasonic pulse-echo system, e.g. a flaw detector, medical diagnostic device, sonar or fish finder, and is applicable to transducers of the piezoelectric, ferroelectric or magnetostrictive type. The Fig. 1 probe comprises transducer 1, protective cover 4, delay-producing conductive backing plate 2, resin encapsulation 5 and matching transformer 7 in a metal housing 9. If the medium (e.g. air) behind plate 2 is of lower acoustic impedance than the plate, the plate thickness is made an odd multiple of a quarter wavelength; if of higher impedance than the plate (e.g. if plate 2 is of plastic or resin and is backed by a bonded layer of steel, tungsten or other hard metal) then the plate thickness is made approximately an odd multiple of a half wavelength (the layer thickness being an odd multiple of a quarter wavelength). In the Fig. 2 probe an auxiliary transducer 3 is coupled to the delay-producing plate 2 and is connected in series or parallel with transducer I, e.g. as illustrated. The plate 2 thickness is made equal to an odd or even multiple of the half-wavelength according to the polarity of the electrical connection. The Fig. 3 probe comprises a delayproducing plastics sheet 14 faced with a metal foil 15 for the electrical connection to transducer I. Sheet 14 is acoustically coupled .with transducer 1 by a layer of high viscosity liquid and is backed by a rubber sheet 16 and a block 17 of wood, rigid plastic or metal. The probes may be used as angle or shear wave probes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB190668A GB1249628A (en) | 1968-01-12 | 1968-01-12 | Improvements in or relating to ultrasonic pulse-echo systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB190668A GB1249628A (en) | 1968-01-12 | 1968-01-12 | Improvements in or relating to ultrasonic pulse-echo systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1249628A true GB1249628A (en) | 1971-10-13 |
Family
ID=9730120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB190668A Expired GB1249628A (en) | 1968-01-12 | 1968-01-12 | Improvements in or relating to ultrasonic pulse-echo systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1249628A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0750469A1 (en) * | 1994-03-08 | 1997-01-02 | Cardiovascular Imaging Systems, Inc. | Low profile intravascular ultrasound imaging transducer |
| FR2860736A1 (en) * | 2003-10-08 | 2005-04-15 | Bosch Gmbh Robert | Ultrasound sensor for motor vehicle, has piezo-electric unit provided on lamella embedded in damping foam, and connected to circuit that transmits electric voltage to remove oscillation energy from membrane in temporized manner |
| DE102007008505A1 (en) * | 2007-02-21 | 2008-08-28 | Siemens Ag | Method of operating a piezoelectric transducer and transducer device |
-
1968
- 1968-01-12 GB GB190668A patent/GB1249628A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0750469A1 (en) * | 1994-03-08 | 1997-01-02 | Cardiovascular Imaging Systems, Inc. | Low profile intravascular ultrasound imaging transducer |
| EP0750469A4 (en) * | 1994-03-08 | 2000-01-19 | Cardiovascular Imaging Systems | Low profile intravascular ultrasound imaging transducer |
| FR2860736A1 (en) * | 2003-10-08 | 2005-04-15 | Bosch Gmbh Robert | Ultrasound sensor for motor vehicle, has piezo-electric unit provided on lamella embedded in damping foam, and connected to circuit that transmits electric voltage to remove oscillation energy from membrane in temporized manner |
| DE102007008505A1 (en) * | 2007-02-21 | 2008-08-28 | Siemens Ag | Method of operating a piezoelectric transducer and transducer device |
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