IE802052L - Echo-type range finding system - Google Patents
Echo-type range finding systemInfo
- Publication number
- IE802052L IE802052L IE802052A IE205280A IE802052L IE 802052 L IE802052 L IE 802052L IE 802052 A IE802052 A IE 802052A IE 205280 A IE205280 A IE 205280A IE 802052 L IE802052 L IE 802052L
- Authority
- IE
- Ireland
- Prior art keywords
- signal
- echo
- predetermined period
- processing means
- rangefinding
- Prior art date
Links
- 238000005070 sampling Methods 0.000 abstract 2
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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/523—Details of pulse systems
- G01S7/526—Receivers
- G01S7/527—Extracting wanted echo signals
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)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
An echo type rangefinding a system, preferably using ultrasonic energy bursts, includes a transducer for transmitting and receiving the energy burst and signal processing means for identifying a true echo of the energy burst (54) from a selected target. The signal processing means discriminates against spurious signals and electronic noise, some of which may be generated by the rangefinding system itself, by rejecting signals that do not persist for at least a predetermined period. Preferably, the system recognizes the leading edge of a true echo signal by sampling the integrated signal (156) at sampling intervals (158) which are small compared with the said predetermined period (for example 0.6 milliseconds). If the samples integrated signal voltage (Vc) steadily increases at at least a given minimum rate for at least the predetermined period then the signal processing means provides an "object detect" signal. The accuracy of the rangefinding system is improved firstly because of the improved signal discrimination, and secondly because the object detect signal is always produced at the same time after the beginning of the true echo signal. <IMAGE>
[GB2059590A]
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8135779A | 1979-10-03 | 1979-10-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
IE802052L true IE802052L (en) | 1981-04-03 |
IE50163B1 IE50163B1 (en) | 1986-02-19 |
Family
ID=22163638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE2052/80A IE50163B1 (en) | 1979-10-03 | 1980-10-02 | Improved echo recognition system |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5660374A (en) |
AT (1) | AT375198B (en) |
AU (1) | AU536697B2 (en) |
CA (1) | CA1154140A (en) |
CH (1) | CH651387A5 (en) |
DE (1) | DE3037139A1 (en) |
FR (1) | FR2466780B1 (en) |
GB (1) | GB2059590B (en) |
IE (1) | IE50163B1 (en) |
IT (1) | IT1133656B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8334394D0 (en) * | 1983-12-23 | 1984-02-01 | Czajowski S B | Electrical circuits |
EP0173243B1 (en) * | 1984-08-28 | 1991-01-16 | Hewlett-Packard Company | Apparatus for measuring the velocity of a stream of particles |
DE4433957A1 (en) * | 1994-09-23 | 1996-03-28 | Mayser Gmbh & Co | Ultrasonic obstacle detection method |
GB2338132B (en) * | 1998-06-02 | 2003-05-28 | Federal Ind Ind Group Inc | Echo detection in echo ranging systems |
DE102012200024A1 (en) | 2012-01-02 | 2013-07-04 | Robert Bosch Gmbh | Method and environment detection device for determining the position and / or movement of at least one object in the vicinity of a movement aid by means of at least one acoustic pulse |
DE102012200716A1 (en) * | 2012-01-19 | 2013-07-25 | Robert Bosch Gmbh | Method for determining the position and / or movement of objects in the vicinity of a movement aid by means of sound signals and device for carrying out the method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1566852C3 (en) * | 1967-10-12 | 1974-02-07 | Fried. Krupp Gmbh, 4300 Essen | Arrangement for differentiating echo sounder pulses |
US3701090A (en) * | 1970-12-22 | 1972-10-24 | Amf Inc | Shipboard acoustic receiver |
JPS5121852A (en) * | 1974-08-15 | 1976-02-21 | Furuno Kyotaka | TANTAIBUTSUTAIHANBETSUSOCHI |
CA1120578A (en) * | 1976-10-04 | 1982-03-23 | Juerg Muggli | Ultrasonic ranging system for a camera |
US4199246A (en) * | 1976-10-04 | 1980-04-22 | Polaroid Corporation | Ultrasonic ranging system for a camera |
DE2726981C2 (en) * | 1977-06-15 | 1984-11-22 | Fried. Krupp Gmbh, 4300 Essen | Device for measuring time between pulses |
JPS5484762A (en) * | 1977-12-17 | 1979-07-05 | Fuji Roiyaru Kk | Noise reject device of ultrasonic underwater detector |
-
1980
- 1980-09-22 CA CA000360730A patent/CA1154140A/en not_active Expired
- 1980-09-30 AU AU62810/80A patent/AU536697B2/en not_active Ceased
- 1980-10-01 DE DE19803037139 patent/DE3037139A1/en active Granted
- 1980-10-02 CH CH7372/80A patent/CH651387A5/en not_active IP Right Cessation
- 1980-10-02 JP JP13681480A patent/JPS5660374A/en active Granted
- 1980-10-02 IT IT25072/80A patent/IT1133656B/en active
- 1980-10-02 IE IE2052/80A patent/IE50163B1/en not_active IP Right Cessation
- 1980-10-03 AT AT0493880A patent/AT375198B/en not_active IP Right Cessation
- 1980-10-03 FR FR8021256A patent/FR2466780B1/en not_active Expired
- 1980-10-03 GB GB8031900A patent/GB2059590B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2466780B1 (en) | 1986-02-28 |
FR2466780A1 (en) | 1981-04-10 |
ATA493880A (en) | 1983-11-15 |
CH651387A5 (en) | 1985-09-13 |
DE3037139C2 (en) | 1993-04-01 |
AU6281080A (en) | 1981-04-09 |
AU536697B2 (en) | 1984-05-17 |
IT8025072A0 (en) | 1980-10-02 |
IE50163B1 (en) | 1986-02-19 |
IT1133656B (en) | 1986-07-09 |
AT375198B (en) | 1984-07-10 |
CA1154140A (en) | 1983-09-20 |
JPS5660374A (en) | 1981-05-25 |
DE3037139A1 (en) | 1981-04-16 |
GB2059590A (en) | 1981-04-23 |
JPH0156712B2 (en) | 1989-12-01 |
GB2059590B (en) | 1984-02-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Patent lapsed |