GB790934A - Improvements in or relating to the measurement of heights, distances and direction by means of sonic and ultrasonic sound vibrations - Google Patents
Improvements in or relating to the measurement of heights, distances and direction by means of sonic and ultrasonic sound vibrationsInfo
- Publication number
- GB790934A GB790934A GB22329/55A GB2232955A GB790934A GB 790934 A GB790934 A GB 790934A GB 22329/55 A GB22329/55 A GB 22329/55A GB 2232955 A GB2232955 A GB 2232955A GB 790934 A GB790934 A GB 790934A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transmission
- frequency
- vibration
- gated
- aug
- 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
Abstract
790,934. Echo distancemeasuring. KONINKLIJKE LUCHTVAART MAATSCHAPPIJ N.V., DERKSEN, J. W., and KIPS, E. J. E. Aug. 3, 1955 [Aug. 4, 1954], No. 22329/55. Drawings to Specification. Class 118 (2). Apparatus for determining the height or the distance to a reflecting surface by measuring the time interval between the transmission of an acoustic sonic or ultrasonic vibration and the reception of such vibration after reflection from the reflecting surface is characterized in that for transmitting the vibration use is made of a source of sound, the transmitted energy of which is in its entirety concentrated on one adjustable frequency, and wherein at the beginning of the transmission a predetermined constant amplitude is obtained substantially without building- up time and at the end of the transmission the amplitude becomes zero substantially without decaying time. An embodiment, illustrated by means of a block diagram, utilizes as transmitter an ionophone as described in Specification 659,796, [Group XL (a)], and a special receiver having a very high selectivity responsive to only one predetermined frequency and harmonics thereof. Extraneous noises, for example on an aircraft, are thus largely eliminated from the apparatus. The transmitter and receiver are directional and are controlled by a gyroscopic system whereby measurements are independent of the rolling of the aircraft or other vessel carrying the apparatus. Range is measured by means of low-frequency timing pulses which are passed to an electronic counter and indicator by a switching device which is gated on by the transmission pulse and gated off by the echo pulse. The number of pulses passed during this interval are proportional to range and the frequency of the timing pulse generator may be varied to give the indication in any desired units. U.S.A. Specification 2,574,596 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL790934X | 1954-08-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB790934A true GB790934A (en) | 1958-02-19 |
Family
ID=19834401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22329/55A Expired GB790934A (en) | 1954-08-04 | 1955-08-03 | Improvements in or relating to the measurement of heights, distances and direction by means of sonic and ultrasonic sound vibrations |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1173126A (en) |
| GB (1) | GB790934A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3307143A (en) * | 1964-12-28 | 1967-02-28 | Projects Unltd Inc | Sonar device |
| US3528053A (en) * | 1969-03-26 | 1970-09-08 | Abraham Rubin | Apparatus for a depth indicator |
| CN113766402A (en) * | 2021-09-11 | 2021-12-07 | 武汉左点科技有限公司 | Hearing aid method and device for improving environmental adaptability |
| CN113766402B (en) * | 2021-09-11 | 2024-04-26 | 武汉左点科技有限公司 | Hearing aid method and device for improving environmental adaptability |
-
1955
- 1955-08-03 GB GB22329/55A patent/GB790934A/en not_active Expired
- 1955-08-12 FR FR1173126D patent/FR1173126A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3307143A (en) * | 1964-12-28 | 1967-02-28 | Projects Unltd Inc | Sonar device |
| US3528053A (en) * | 1969-03-26 | 1970-09-08 | Abraham Rubin | Apparatus for a depth indicator |
| CN113766402A (en) * | 2021-09-11 | 2021-12-07 | 武汉左点科技有限公司 | Hearing aid method and device for improving environmental adaptability |
| CN113766402B (en) * | 2021-09-11 | 2024-04-26 | 武汉左点科技有限公司 | Hearing aid method and device for improving environmental adaptability |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1173126A (en) | 1959-02-20 |
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