GB1351096A - Radar distance measuring apparatus - Google Patents
Radar distance measuring apparatusInfo
- Publication number
- GB1351096A GB1351096A GB3136672A GB3136672A GB1351096A GB 1351096 A GB1351096 A GB 1351096A GB 3136672 A GB3136672 A GB 3136672A GB 3136672 A GB3136672 A GB 3136672A GB 1351096 A GB1351096 A GB 1351096A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- counter
- fed
- delay
- pseudo
- 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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/325—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of coded signals, e.g. P.S.K. signals
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
1351096 Radar HONEYWELL GmbH 5 July 1972 [6 July 1971] 31366/72 Heading H4D Distance measuring apparatus in which two signals are correlated, one being a delayed version of the transmitted pseudo-random sequence of pulses the other being the received signal and wherein the delayed signal is progressively delayed by a given time interval per period of pulse sequence and the delay for maximum correlation is measured to indicate the distance. Generators 2, 3 produce identical pseudo-random sequences under the timing control of clock 1. The signal X(t) is used to modulate the radar transmitter 4 and received signals are demodulated and passed to one input of sign logic 11. Generator 3 produces a signal Z(t) at the end of every completed pseudorandom sequence which advances counter 14 by one and is fed to the J input of bi-stable 21. During the next clock pulse from clock 1, generator 3 is held reset by the Q output of bi-stable 21 and thus is delayed in recommencing the next pseudo-random sequence. Generator 2 however continues to recycle without delay since the J input to bi-stable 23 is held continuously at "0". Thus the signal X(t - #) fed to the second input of logic 11 has a progressively increasing delay with respect to the transmitted signal during successive sequences. Logic 11 detects whether the instantaneous values of the two inputs A and B are identical and produces a corresponding + or - output which is fed to up-down counter 12. Since the auto-correlation function of a pseudo-random code is zero except at coincidence counter 12 content will vary about zero for the sequences before coincidence and during the period when the delay of the comparison signal equals the echo time of the received signal will rise to a maximum. At maximum count, a signal V12 stops period counter 14 and resets generators 2 and 3 to recommence their cycles. The output of counter 14 is transferred into a memory and decoder 16 which drives a digital indicator 17. The two correlated signals are also fed to an analogue correlation chain 25, 26 which drives an A-D converter 27 whose output provides a further digit 28 for the distance indication. During the sequence in which coincidence of the two signals occurs the analogue correlation provides a finer resolution of the range. A further increase in resolution may be obtained by increasing the clock frequency at the expense of loss of maximum range. Light or acoustic waves may also be used. Device may be used for anti-collision in all types of vehicle or for a fuse.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712133497 DE2133497C3 (en) | 1971-07-06 | 1971-07-06 | Method and arrangement for correlation distance measurement by means of a pseudostochastic pulse sequence |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1351096A true GB1351096A (en) | 1974-04-24 |
Family
ID=5812788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3136672A Expired GB1351096A (en) | 1971-07-06 | 1972-07-05 | Radar distance measuring apparatus |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2133497C3 (en) |
GB (1) | GB1351096A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4816834A (en) * | 1984-03-30 | 1989-03-28 | Honeywell Inc. | Pulse synchronizing apparatus |
US5115247A (en) * | 1988-02-16 | 1992-05-19 | Honeywell Inc. | Frequency modulated, phase coded radar |
GB2305323A (en) * | 1989-03-03 | 1997-04-02 | Marconi Gec Ltd | Ranging systems |
US7646333B2 (en) | 2008-06-04 | 2010-01-12 | Honeywell International Inc. | Pseudo-random pulse interval generation in navigation-aiding devices |
CN109632043A (en) * | 2017-10-05 | 2019-04-16 | 克洛纳股份公司 | The method and level measurement equipment for determining medium material position are measured by continuous wave radar |
CN113466605A (en) * | 2021-05-07 | 2021-10-01 | 中国矿业大学 | MMC (Modular multilevel converter) -based pseudo-random code fault distance measurement method and system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2223704B1 (en) * | 1973-03-27 | 1977-09-02 | Thomson Csf | |
US4328495A (en) * | 1980-04-28 | 1982-05-04 | Honeywell Inc. | Unambiguous doppler radar |
US4429310A (en) * | 1981-04-22 | 1984-01-31 | Sperry Corporation | Random binary waveform encoded ranging apparatus |
CA1260557A (en) * | 1984-03-30 | 1989-09-26 | Merlin D. Bjorke | Pulse synchronizing apparatus |
US5233352A (en) * | 1992-05-08 | 1993-08-03 | Cournane Thomas C | Level measurement using autocorrelation |
-
1971
- 1971-07-06 DE DE19712133497 patent/DE2133497C3/en not_active Expired
-
1972
- 1972-07-05 GB GB3136672A patent/GB1351096A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4816834A (en) * | 1984-03-30 | 1989-03-28 | Honeywell Inc. | Pulse synchronizing apparatus |
US5115247A (en) * | 1988-02-16 | 1992-05-19 | Honeywell Inc. | Frequency modulated, phase coded radar |
GB2305323A (en) * | 1989-03-03 | 1997-04-02 | Marconi Gec Ltd | Ranging systems |
GB2305323B (en) * | 1989-03-03 | 1998-01-07 | Marconi Gec Ltd | Ranging systems |
US5731782A (en) * | 1989-03-03 | 1998-03-24 | Gec-Marconi Limited | Ranging systems |
US7646333B2 (en) | 2008-06-04 | 2010-01-12 | Honeywell International Inc. | Pseudo-random pulse interval generation in navigation-aiding devices |
CN109632043A (en) * | 2017-10-05 | 2019-04-16 | 克洛纳股份公司 | The method and level measurement equipment for determining medium material position are measured by continuous wave radar |
CN109632043B (en) * | 2017-10-05 | 2023-11-03 | 克洛纳股份公司 | Method for determining the fill level of a medium by means of continuous wave radar measurement and fill level measuring device |
CN113466605A (en) * | 2021-05-07 | 2021-10-01 | 中国矿业大学 | MMC (Modular multilevel converter) -based pseudo-random code fault distance measurement method and system |
CN113466605B (en) * | 2021-05-07 | 2022-08-05 | 中国矿业大学 | MMC (Modular multilevel converter) -based pseudo-random code fault distance measurement method and system |
Also Published As
Publication number | Publication date |
---|---|
DE2133497B2 (en) | 1974-04-18 |
DE2133497A1 (en) | 1973-01-25 |
DE2133497C3 (en) | 1974-11-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |