GB868146A - Improvements in and relating to echo-ranging and the like - Google Patents

Improvements in and relating to echo-ranging and the like

Info

Publication number
GB868146A
GB868146A GB1296658A GB1296658A GB868146A GB 868146 A GB868146 A GB 868146A GB 1296658 A GB1296658 A GB 1296658A GB 1296658 A GB1296658 A GB 1296658A GB 868146 A GB868146 A GB 868146A
Authority
GB
United Kingdom
Prior art keywords
echo
head
pulses
display
trigger
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
GB1296658A
Inventor
Peter Roy Hopkin
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 GB1296658A priority Critical patent/GB868146A/en
Priority to ES0248869A priority patent/ES248869A1/en
Priority to BE577983A priority patent/BE577983A/en
Publication of GB868146A publication Critical patent/GB868146A/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
    • 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
    • G01S7/56—Display arrangements
    • G01S7/62—Cathode-ray tube displays
    • G01S7/6209—Cathode-ray tube displays providing display of one measured variable

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

868,146. Echo sounding; distance measuring apparatus. KELVIN & HUGHES Ltd. April 21, 1959 [April 23, 1958], No. 12966/58. Class 40(7). An apparatus used for ranging, as for example in radar, echo-sounding, or flaw detection systems, and in which only echo signals received from within a particular range are displayed, the time base of the display being triggered by an echo from the further limit of said range, comprises a recording medium moved recurrently relative to a record/reproduce head and an erase head, and includes means for switching the former head between its two conditions and for switching off the erase head during reproduction. As described with reference to fish detection the apparatus includes a rotating magnetic recording drum 19, a record/reproduce head 16 and an erase head 18. The transceiver unit 10 transmits pulses (a) which return as (b) in the form of transmitter break-through pulses 11, fish echoes 13 and bottom echoes 12. The break-through pulses are muted and signals (c) pass to the recording drum via units 14, 15 and 16. The bottom echo 12 is passed (d) by an amplitude gate 20 to trigger multivibrator 22. This gives a long negative pulse (e) whose negative going edge changes switch 15 to its reproduce condition and also switches off the erase and bias oscillator 17. The recording drum makes several revolutions during the negative pulse (e) and hence the reproduced signal is as at (f). This signal is fed to the display 29 and to an amplitude gate 31 which passes the bottom echoes (g). These trigger a second multivibrator 33 which in effect delays each reproduced bottom echo by a time t<SP>1</SP>, (h), the delayed pulses being used to trigger the display time-base 30 sweep waveform (i). In this manner the blank periods corresponding to the erased portion of the drum 19, which lies between heads 16 and 18, are not displayed. Repeated display of the recorded signals occurs until the positive going edge (e) returns switch 15 to the record condition and switches on oscillator 17 prior to the reception of the next bottom echo. Specifications 785,001 and 839,131 are referred to.
GB1296658A 1958-04-23 1958-04-23 Improvements in and relating to echo-ranging and the like Expired GB868146A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1296658A GB868146A (en) 1958-04-23 1958-04-23 Improvements in and relating to echo-ranging and the like
ES0248869A ES248869A1 (en) 1958-04-23 1959-04-11 Improvements in and relating to echo-ranging and the like
BE577983A BE577983A (en) 1958-04-23 1959-04-22 Improvements to echo tracking equipment and the like.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1296658A GB868146A (en) 1958-04-23 1958-04-23 Improvements in and relating to echo-ranging and the like

Publications (1)

Publication Number Publication Date
GB868146A true GB868146A (en) 1961-05-17

Family

ID=10014366

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296658A Expired GB868146A (en) 1958-04-23 1958-04-23 Improvements in and relating to echo-ranging and the like

Country Status (3)

Country Link
BE (1) BE577983A (en)
ES (1) ES248869A1 (en)
GB (1) GB868146A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294684B (en) * 1962-02-14 1969-05-08 Krupp Gmbh Device for recording transverse profiles, in particular of waterways

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294684B (en) * 1962-02-14 1969-05-08 Krupp Gmbh Device for recording transverse profiles, in particular of waterways

Also Published As

Publication number Publication date
ES248869A1 (en) 1960-01-01
BE577983A (en) 1959-08-17

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