GB1061954A - Improvements in or relating to echo sounding apparatus - Google Patents
Improvements in or relating to echo sounding apparatusInfo
- Publication number
- GB1061954A GB1061954A GB2656564A GB2656564A GB1061954A GB 1061954 A GB1061954 A GB 1061954A GB 2656564 A GB2656564 A GB 2656564A GB 2656564 A GB2656564 A GB 2656564A GB 1061954 A GB1061954 A GB 1061954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- synchronizing
- train
- generator
- 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
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
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/96—Sonar systems specially adapted for specific applications for locating fish
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
1,061,954. Echo sounding apparatus. ATLASWERKE A.G. June 26, 1964 [June 29, 1963], No. 26565/64. Heading H4D. [Also in Division G3] In echo sounding apparatus of the type wherein the transmitting and receiving transducers are mounted on the fishing net, separate from the ship and an indicating device, measuring results, together with necessary synchronizing signals, are fed from the transducers to the ship by means of a distinguishably modulated sound wave. Two trains of synchronizing pulses may be provided, one being for fine control of the indicating device and the other being for coarse control thereof. The remote transducer means comprises, Fig. 1, a pulses generator 6, producing a rapid train of pulses (U1), Fig. 3a (not shown). These are given a characteristic width in a first generator 8, and are fed as train (U5) to frequency modulate the output of generator 4. Train (U1) is also fed to frequency divider 7 to produce train (U2) which is used to trigger the transmit/receive transducer 1. Train (U2) is also passed to a second generator 9 where the pulses are given a characteristic width and are passed on as pulses (U6) to frequency modulate generator 4. Echo pulses (U7) from the transducer 1 and receiving amplifier 3 are also used to frequency modulate generator 4. The output of generator 4, frequency modulated with the echo signals and the two synchronizing pulse trains, is fed to a transducer 5 for transmission to the ship. The signal is received at the ship by transducer 10, Fig. 2, and the various pulses separated out after demodulation by filter 13, the echo pulses being shown as (U10), Fig. 3b (not shown), the coarse synchronizing train as (U9) and the fine synchronizing train as (U8). The echo pulses are fed to an echograph, comprising a chart 16 and a stylus 15, carried on a belt 17 controlled by a motor 20 such that the stylus travels down the chart, ideally in synchronism with transmission of pulses (U3) by transducer 1. The coarse synchronizing pulses (U9) are converted into pulses (U19), Fig. 3b, in pulse shaper 38 and each pulse thereof used to stop the pulse output of a bi-stable multivibrator 37. The multivibrator pulses are started by pulses (U17) from a cam switch operated in synchronism with the movement of stylus 15. When synchronism is achieved between the movement of stylus 15 and the transmission of the pulses by transducer 1, the stylus makes a mark on datum line 22 on the chart, simultaneously with a pulse being transmitted. In this synchronized state the pulses (U17) are midway between pulses (U19). The output of the multivibrator (U18) is integrated in Miller integrator 39 to give waveform (U20). The peak valve of the waveform representing the duration of the multivibrator output and the position in time of (U17) is stored in storage condenser 40 to give waveform (U21). The stored peak valve is compared with a voltage level (U22) from voltage source 42, during a time tv as defined by the width of pulse (U23), and the result, which would be zero in the case of exact synchronism, is used to adjust the speed of the motor 20 to obtain synchronism. The fine synchronizing pulses (U8) provide synchronizing signals for the motor in the same manner. When pulse (U17) is more than half the spacing of pulses U8 from its synchronous position midway between the pulses U9, the fine synchronizing pulses are not able to bring the motor 20 into synchronizing and so are blocked by gate 33 under the control of a comparator stage 45 determining when the peak valve of waveform (U21) is outside the region bounded by the levels (U23MAX) and (U23MIN).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1963A0043466 DE1255004B (en) | 1963-06-29 | 1963-06-29 | Echolotgeraet in which a plumbing station is mounted on an underwater body and an observation station on an observation ship |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1061954A true GB1061954A (en) | 1967-03-15 |
Family
ID=6933659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2656564A Expired GB1061954A (en) | 1963-06-29 | 1964-06-26 | Improvements in or relating to echo sounding apparatus |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE1255004B (en) |
DK (1) | DK111288B (en) |
GB (1) | GB1061954A (en) |
NL (1) | NL6406984A (en) |
NO (1) | NO117288B (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1029713B (en) * | 1954-02-23 | 1958-05-08 | Electroacustic Gmbh | Device for the detection of objects under water, such. B. schools of fish, obstacles, etc. with the help of underwater sound |
US3038143A (en) * | 1956-01-17 | 1962-06-05 | Dow Willard | Telemetering depth meter |
-
1963
- 1963-06-29 DE DE1963A0043466 patent/DE1255004B/en active Pending
-
1964
- 1964-06-18 NL NL6406984A patent/NL6406984A/xx unknown
- 1964-06-26 DK DK320864A patent/DK111288B/en unknown
- 1964-06-26 NO NO15381864A patent/NO117288B/no unknown
- 1964-06-26 GB GB2656564A patent/GB1061954A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DK111288B (en) | 1968-07-15 |
NL6406984A (en) | 1964-12-30 |
NO117288B (en) | 1969-07-21 |
DE1255004B (en) | 1967-11-23 |
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