JPS55155266A - Mutual interference eliminating circuit - Google Patents
Mutual interference eliminating circuitInfo
- Publication number
- JPS55155266A JPS55155266A JP6300579A JP6300579A JPS55155266A JP S55155266 A JPS55155266 A JP S55155266A JP 6300579 A JP6300579 A JP 6300579A JP 6300579 A JP6300579 A JP 6300579A JP S55155266 A JPS55155266 A JP S55155266A
- Authority
- JP
- Japan
- Prior art keywords
- output
- sonar
- detection
- comparison
- integration
- 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.)
- Pending
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
- G01S15/87—Combinations of sonar systems
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)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To prevent the interferential signal of others' sonar units from appearing on a CRT, by performing comparison with a reference output corresponding to the detection and integration output of one's own sonar unit to control the gain of a sonar receiver. CONSTITUTION:The received wave synthesis output of a synthesis circuit 11 is conducted through BFP12, 13 whose central freuqency values are set for one's own sonar unit and others' sonar units, respectively. The output of the BFP's are integrated by detection and integration circuis 14, 15, the outputs of which are applied to comparators 18, 19. A selector circuit 16 chooses a detection and integration output of one's own sonar frequency from the circuit 14. The chosen output is amplified to a prescribed level by an amplifier 17 and then applied as a comparison reference signal to the comparators 18, 19. As a result, the comparator 18 or 19 which is supplied with a detection and integration output of a level, which is not lower than the reference signal, because of the interference of others' sonar units generates a comparison output. The gain of the amplifier of a receiver is decreased by the comparison output to eliminate an interferential signal in performing display on a CRT. An objective body can thus be precisely searched without greatly reducing the searching capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6300579A JPS55155266A (en) | 1979-05-22 | 1979-05-22 | Mutual interference eliminating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6300579A JPS55155266A (en) | 1979-05-22 | 1979-05-22 | Mutual interference eliminating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55155266A true JPS55155266A (en) | 1980-12-03 |
Family
ID=13216763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6300579A Pending JPS55155266A (en) | 1979-05-22 | 1979-05-22 | Mutual interference eliminating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55155266A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606887A (en) * | 1983-06-24 | 1985-01-14 | Fukunari Imada | Ultrasonic range finder |
| JPH02201187A (en) * | 1989-01-30 | 1990-08-09 | Nec Corp | Active sonar device |
| JPH03216577A (en) * | 1990-01-22 | 1991-09-24 | Marine Instr Co Ltd | Underwater acoustic detector |
-
1979
- 1979-05-22 JP JP6300579A patent/JPS55155266A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606887A (en) * | 1983-06-24 | 1985-01-14 | Fukunari Imada | Ultrasonic range finder |
| JPH02201187A (en) * | 1989-01-30 | 1990-08-09 | Nec Corp | Active sonar device |
| JPH03216577A (en) * | 1990-01-22 | 1991-09-24 | Marine Instr Co Ltd | Underwater acoustic detector |
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