GB907554A - Improvements in or relating to aircraft altimeters - Google Patents
Improvements in or relating to aircraft altimetersInfo
- Publication number
- GB907554A GB907554A GB6269/58A GB626958A GB907554A GB 907554 A GB907554 A GB 907554A GB 6269/58 A GB6269/58 A GB 6269/58A GB 626958 A GB626958 A GB 626958A GB 907554 A GB907554 A GB 907554A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- echo
- triggered
- circuits
- generator
- 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
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
907,554. Echo sounding. REUMERMAN, T., and HELMIG, W. H. T. Feb. 24, 1959 [Feb. 26, 1958], No. 6269/58. Class 40 (7). In an altimeter emitting a modulated radiation and determining height by a determination of the time interval between the emitted signals and received echo signals, the repetition frequency of the modulation pattern is caused to vary in dependence on the height. Fig. 1 shows an acoustic (or supersonic) embodiment in which an emitter SE is fed with short duration pulses from generator SG. At the same time, as a pulse is transmitted a series of flip-flop circuits F11, F12, F13, &c. is triggered to cause each circuit to change to its unstable state. The circuits are graded so that after a given time F11 returns to its original state, followed in sequence by F12, F13, and so on. Each flipflop circuit has an associated gate circuit P11, P12, P13, &c. which it tends to open, when triggered, by the connection over lines such as 24. However, each triggered circuit also inhibits the opening of any following gate circuit by applying a suitable potential to the line system 25; the gates are thus opened one at a time in sequence, P11 being opened first, P12 opening between the times when F1 and F12 return to their original states, and so on. Returning echo pulses are received at R, rectified at G2 and applied to line 26. The echo pulse on line 26 passes through whichever gate circuit is open to reverse one of control circuits F21, F22, F23 ... and light the appropriate indicator lamp L. The control circuits are interconnected so that operation of one automatically resets any previously operated member of the series. The output of G2 is also fed through delay means D1 to reset all the flip-flop circuits and through further delay means D2 to trigger the generator SG and initiate a fresh transmitter pulse. In the absence of a trigger signal from D2 the generator provides pulses at time intervals corresponding to a height greater than the maximum range of the system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6269/58A GB907554A (en) | 1958-02-26 | 1958-02-26 | Improvements in or relating to aircraft altimeters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6269/58A GB907554A (en) | 1958-02-26 | 1958-02-26 | Improvements in or relating to aircraft altimeters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB907554A true GB907554A (en) | 1962-10-10 |
Family
ID=9811450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6269/58A Expired GB907554A (en) | 1958-02-26 | 1958-02-26 | Improvements in or relating to aircraft altimeters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB907554A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4056802A (en) * | 1976-03-10 | 1977-11-01 | The United States Of America As Represented By The Secretary Of The Navy | Sonar alarm system |
-
1958
- 1958-02-26 GB GB6269/58A patent/GB907554A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4056802A (en) * | 1976-03-10 | 1977-11-01 | The United States Of America As Represented By The Secretary Of The Navy | Sonar alarm system |
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