GB801461A - Pulse-echo system - Google Patents
Pulse-echo systemInfo
- Publication number
- GB801461A GB801461A GB17079/55A GB1707955A GB801461A GB 801461 A GB801461 A GB 801461A GB 17079/55 A GB17079/55 A GB 17079/55A GB 1707955 A GB1707955 A GB 1707955A GB 801461 A GB801461 A GB 801461A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- echoes
- gain
- pulse
- abrupt
- 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
- 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
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)
Abstract
801,461. Echo distance-measuring. CLEVITE CORPORATION. June 14, 1955 [June 15, 1954], No. 17079/55. Class 118 (2). An underwater pulse-echo system comprises in combination underwater acoustic transducer means for transmitting an abrupt acoustic signal pulse and for receiving signal echoes, a receiver circuit connected to the transducer means to respond to signal echoes received thereby, time variable-gain amplifier means connected to the transducer means and operative to reduce the gain of signal echoes received initially and increase the gain of later-received signal echoes, and a differentiator in the receiver circuit capable of passing abrupt signal echoes and rejecting echoes of slowly changing amplitude. The transmitted pulse 12 produces various reflections from the water surface, from particles in the water, and from the sea bottom. The sum total of these discrete pulses from progressively distant reflections results in a slowly decaying reverberation signal 13 which tends to obscure a target echo such as 14. The differentiating circuit separates the slowly decaying signal 13 and abrupt signal 14 whilst the use of swept gain prevents the initial steep front of the reverberation 13 from producing an output signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US801461XA | 1954-06-15 | 1954-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB801461A true GB801461A (en) | 1958-09-17 |
Family
ID=22155544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17079/55A Expired GB801461A (en) | 1954-06-15 | 1955-06-14 | Pulse-echo system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB801461A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2404231A1 (en) * | 1977-09-27 | 1979-04-20 | Foerenade Fabriksverken | METHOD FOR MAKING A DISTINCTION BETWEEN MOBILE TARGETS AND A WATER SURFACE |
-
1955
- 1955-06-14 GB GB17079/55A patent/GB801461A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2404231A1 (en) * | 1977-09-27 | 1979-04-20 | Foerenade Fabriksverken | METHOD FOR MAKING A DISTINCTION BETWEEN MOBILE TARGETS AND A WATER SURFACE |
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