GB1234502A - - Google Patents
Info
- Publication number
- GB1234502A GB1234502A GB1234502DA GB1234502A GB 1234502 A GB1234502 A GB 1234502A GB 1234502D A GB1234502D A GB 1234502DA GB 1234502 A GB1234502 A GB 1234502A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulse
- beacon
- pulses
- beams
- vehicle
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
- G01S13/913—Radar or analogous systems specially adapted for specific applications for traffic control for landing purposes
-
- 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
- G01S1/02—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 radio waves
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
1,234,502. Radio navigation. P. P. SCHAUFFLER. 13 Jan., 1969, No. 13822/69. Divided out of 1,234,501. Heading H4D. In a channel guidance system a beacon A 1 , Fig. 1, transmits a pulse followed by reflected pulses from all vehicles in the channel and on a vehicle the train of pulses is received, the reflected pulse corresponding to the vehicle is identified and the distance w from the beacon is measured. In an embodiment the beacon also transmits relatively long and sequential pulses on overlapping beams F 1 , F 2 whereby the vehicle can determine its lateral offset x from the relationship x = bw. At the beacon, Figs. 2A, 5A a received synchronizing pulse H 1 triggers a monostable circuit 5, the position of the trailing edge of the output pulse J 1 being selectable. " Distance ",T 1 to T 2 , and " angle ", T 2 to T 3 , intervals of equal duration are defined by monostable circuits 6, 7 which generate respective pulses K 1 , P 1 . The overlapping beams F 1 , F 2 are produced by respective aerials 19a, 19b which are connected by normally closed electronic switches 18a, 18b to a transmitter 15. During the distance interval a pulse L 1 derived from pulse K 1 triggers radar transmitter 10 and the ensuring radar receive video signal M 1 (which includes a radar transmitter leakage pulse as the first one) is transmitted simultaneously by beams F 1 , F 2 . During the angle interval, switches 18a, 18b are controlled by respective pulses S 1 , R 1 from monostable circuits 17, 16 such that beacon pulses V 1a , V 1b are transmitted sequentially on beams F 1 , F 2 . At the vehicle, Figs. 2B, 5B pulses J 2 , K 2 and P 2 are derived from the synchronizing pulse (the first pulse in trains G 2 , H 2 ) in a manner corresponding to that at the beacon but pulse J 2 terminates shortly before the instant T 1 . During the distance interval, pulse K 2 actuates a sweep generator 56 to apply a vertical timebase L 2 to a cathode-ray tube (C.R.T.) 52, and operates a switch 51 to apply the radar pulse train M 2 of the received signals to (i) intensitymodulate C.R.T. 52 and (ii) a monostable circuit 54 which is accordingly triggered by the first pulse (corresponding to the radar transmitterleakage component at the beacon) of train M 2 to give a variable duration output pulse N 2 which is differentiated to produce a range strobe O 2 applied to intensity-modulate C.R.T. 52. The timing of the strobe is varied by a motor unit 53, adjusted manually at a known position of the vehicle to make strobe O 2 coincident with the echo pulse Ty corresponding to the vehicle, the coincidence condition being thereafter maintained automatically utilizing a discriminator 57. During the angle interval T 2 to T 3 the received beacon pulses B 1 , B 2 are selected by switches 60a, 60b stretched in circuits 61a, 61b the outputs from which are applied to a centrezero angular displacement indicator 62 and to a differential amplifier 70 to afford a voltage proportional to angle b, Fig. 1, and which is multiplied by distance-controlled potentiometer 71 to afford a display of lateral offset x which is also recorded. Modifications.-The angle pulses may be simultaneous and differentiated by different modulation. Visual and/or audible alarms can be incorporated in the offset circuit to warn of departure from the centre-line of the channel and in the distance circuit when transition to the next beacon is necessary. At each beacon the radar transmission may be shifted sequentially on beams similar to beams F 1 , F 2 , the corresponding radar signals relayed to the vehicle being presented on two adjacent sweeps on C.R.T. 52, Fig. 2B. Additions.-A beacon A 2 , Fig. 1, with beams F3, F 4 may be added; additional beams F 5 , F 6 may be provided; and separate beacons A 3 , A 4 may be utilized for inbound and outwardbound traffic lanes.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1382269 | 1969-01-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1234502A true GB1234502A (en) | 1971-06-03 |
Family
ID=10030019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1234502D Expired GB1234502A (en) | 1969-01-13 | 1969-01-13 |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1234502A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2216358A (en) * | 1988-02-26 | 1989-10-04 | Siemens Ag | Tracking moving object |
-
1969
- 1969-01-13 GB GB1234502D patent/GB1234502A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2216358A (en) * | 1988-02-26 | 1989-10-04 | Siemens Ag | Tracking moving object |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2528202A (en) | Radio navigation system | |
GB1479616A (en) | Train position indication | |
GB1351848A (en) | Receiver for use in an angular position determining system | |
GB1309536A (en) | Doppler radar system | |
US3153232A (en) | Station-keeping radar system | |
GB1325475A (en) | Aircraft clock monitoring and synchronising system | |
US2561345A (en) | Position recording system | |
US4139848A (en) | Aircraft proximity warning indicator | |
FR2361669A1 (en) | ROUTE MEASUREMENT SYSTEM WITH DOPPLER-EFFECT RADAR FOR VEHICLES ASSOCIATED WITH ONE TRACK | |
GB1004840A (en) | Methods and apparatus for obtaining traffic data | |
GB1433819A (en) | Systems for the surveillance of a route | |
DE4005919C1 (en) | Ascertaining range of vision of car driver in fog - using range finder transmitting signals and receiving those reflected from road surface not covered by fog | |
US2502317A (en) | Radio navigation | |
US3130401A (en) | Navigation system | |
US3648285A (en) | Aircraft electronic landing responser system using scanning pencil beam ground antenna | |
US2514351A (en) | Aircraft landing system employing lobe switching of radio beams | |
GB1234502A (en) | ||
GB1180261A (en) | System for Localizing Trains Along a Track | |
US2637022A (en) | Communication system between two stations linked by television | |
US2859437A (en) | Radar contour mapping device | |
GB945613A (en) | Improvements in guidance systems for missiles and other moving bodies | |
GB1092821A (en) | Instrument landing system | |
US3270345A (en) | Electronic channel guidance system | |
SE435554B (en) | NAVIGATION SYSTEM | |
US3422427A (en) | Electronic channel guidance system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |