GB712526A - Improvements in and relating to echo ranging apparatus - Google Patents

Improvements in and relating to echo ranging apparatus

Info

Publication number
GB712526A
GB712526A GB492351A GB492351A GB712526A GB 712526 A GB712526 A GB 712526A GB 492351 A GB492351 A GB 492351A GB 492351 A GB492351 A GB 492351A GB 712526 A GB712526 A GB 712526A
Authority
GB
United Kingdom
Prior art keywords
elements
transducer
degrees
vertical
magneto
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
Application number
GB492351A
Inventor
William Halliday
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.)
Kelvin Hughes Ltd
Original Assignee
Kelvin Hughes Ltd
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 Kelvin Hughes Ltd filed Critical Kelvin Hughes Ltd
Priority to GB530752A priority Critical patent/GB712545A/en
Priority to GB492351A priority patent/GB712526A/en
Publication of GB712526A publication Critical patent/GB712526A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/102—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics
    • 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
    • B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction
    • B06B1/085—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction using multiple elements, e.g. arrays
    • 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

Abstract

712,526. Magneto-strictive transducers. KELVIN & HUGHES, Ltd. Feb. 28, 1952 [Feb. 28, 1951], No. 4923/51. Class 40 (4) [Also in Group XXXVIII] In a pulse echo system for locating objects under water comprising a rotatable directional electro-acoustic transducer, the echo signals being heterodyned to give an audio beat frequency indicative of relative movement of the object, the transducer comprises two selectively-operative oppositely-directed units resonant at different frequencies, e.g. 26 Kc/s and 14 Kc/s, for short and long range operation respectively; the pulse width and recurrence frequency may also be selected in accordance with range and means are described for varying the width and/or direction of the transducer directivity pattern in the vertical plane. Magneto-strictive transducer elements are described but piezo-electric elements may be employed. As shown the 14 Kc/s unit comprises a vertical array of seven elements 10-16 each comprising a horizontal stack of dumb-bell shaped vertical nickel laminations, Fig. 1 (not shown), each having a longitudinal slot 26 and two energizing windings 28, 29, the laminations being clamped to a frame 17 by clamps 30 near the central nodal region. The elements are. selectively energized in the following groups 10-16, 10-12 and 10-11 to produce vertical beam widths of 15 degrees, 30 degrees and 45 degrees, respectively, Fig. 6 (not shown). The 26 Kc/s unit comprises a similar array of eight elements 18-25 selectively energized in groups 20-25, 20-22. and 18-19, the top element 18 being outwardly displaced so that the 45 degree beam is directed downwards at an angle of 22¢ degrees. The inwardly directed faces of the transducer elements are separated by a sheet of rubber 36 between thin brass plates 37, 38 to prevent radiation therefrom and the leads from the energizing windings are taken to a junction box in a water-tight compartment, Fig. 1 and 2 (not shown), mounted on top of frame 17 and thence to slip rings mounted on a vertical pillar, Fig. 5 (not shown), about which the assembly is rotatable.' The whole assembly may be mounted in a dome as described in Specification 611,318, [Group XXXVIII].
GB492351A 1951-02-28 1951-02-28 Improvements in and relating to echo ranging apparatus Expired GB712526A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB530752A GB712545A (en) 1951-02-28 1951-02-28 Improvements in and relating to echo ranging apparatus using mechanical waves
GB492351A GB712526A (en) 1951-02-28 1951-02-28 Improvements in and relating to echo ranging apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB492351A GB712526A (en) 1951-02-28 1951-02-28 Improvements in and relating to echo ranging apparatus

Publications (1)

Publication Number Publication Date
GB712526A true GB712526A (en) 1954-07-28

Family

ID=9786410

Family Applications (1)

Application Number Title Priority Date Filing Date
GB492351A Expired GB712526A (en) 1951-02-28 1951-02-28 Improvements in and relating to echo ranging apparatus

Country Status (1)

Country Link
GB (1) GB712526A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123798A (en) * 1964-03-03 Fish finder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123798A (en) * 1964-03-03 Fish finder

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