GB1075375A - Signal source direction detecting system - Google Patents
Signal source direction detecting systemInfo
- Publication number
- GB1075375A GB1075375A GB3378264A GB3378264A GB1075375A GB 1075375 A GB1075375 A GB 1075375A GB 3378264 A GB3378264 A GB 3378264A GB 3378264 A GB3378264 A GB 3378264A GB 1075375 A GB1075375 A GB 1075375A
- Authority
- GB
- United Kingdom
- Prior art keywords
- state
- pulse
- matrix
- core
- row
- 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
- 239000011159 matrix material Substances 0.000 abstract 8
- 238000004804 winding Methods 0.000 abstract 6
- 230000001934 delay Effects 0.000 abstract 2
- 239000000696 magnetic material Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
- G11C19/04—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using cores with one aperture or magnetic loop
-
- 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
-
- 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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
- G01S3/46—Systems for determining direction or deviation from predetermined direction using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
-
- 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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
- G01S3/802—Systems for determining direction or deviation from predetermined direction
- G01S3/808—Systems for determining direction or deviation from predetermined direction using transducers spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
- G01S3/8083—Systems for determining direction or deviation from predetermined direction using transducers spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems determining direction of source
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
- G01V1/30—Analysis
Landscapes
- Remote Sensing (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
1,075,375. Signal source direction-finding. CSF-COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Aug. 18, 1964 [Aug. 26, 1963], No. 33782/64. Heading H4D. In a system for determining the direction of a sound or radio source, a magnetic core matrix and a shift register provide time delays which compensate for the time delays between the arrival of a plane wave at the several receivers of a coplanar array. The output signal h from each receiver H 1 -H n is amplified and clipped to provide square wave or binary-coded pulses e which are fed to the inputs of respective coincidence (AND) gates ET 1 -ET n . The second input of each ET gate is connected through a respective row winding (1 to n) of the matrix to a control signal generator G, and the outputs of the gates are connected in parallel to the input of a shift register R comprising a series of monostable flip-flops B 1 -B p in cascade. The output of each flip-flop B is connected to a column winding of the matrix. The magnetic material of the cores has a rectangular hysteresis loop and the cores are arranged to be switched from a "0" state to a " 1 " state or vice versa on coincidence of " half-current " pulses in row and column windings of the matrix or on the application of a single " full-current " pulse to a row winding. In a period T generator G applies a " reading " pulse (3a) (Fig. 3), comprising a positive " full current " part followed by a negative " half-current " part to each of the row windings 1 to n in turn. For each row, (i) the positive part of pulse (3a) leaves all cores in the " 0 " state; (ii) if a core in a particular column j is thereby switched from the "1" state to the " 0 " state, a pulse (3b) is induced in the j column winding and triggers the adjacent flip-flop By + 1 : flip-flop B j + 1 then gives a negative " half-current " output pulse (3c) which is coincident in time with the negative part of pulse (3a) and co-operates with it to switch the core in column j + 1 to the " 1 " state; (iii) if the positive part of pulse (3a) coincides with a positive part (i.e. a " 1 " state) of a receiver signal e, the associated ET gate triggers flip-flop B 1 to switch the first core in the row to the " 1 " state. In one period T the net result of the core switching is that each core in a row gives its state to the core immediately on its right, the first core taking up the state of the signal e. Reading wires V (each corresponding to a different direction of the sound or radio source) connect the cores along different diagonals of the matrix, and each wire V feeds a pulse counter (10) followed by an integrator (11) (Fig. 7). The reading wire V at whose terminals the largest number of pulses appear in one reading period T is that corresponding to the direction of the sound or radio source. The pulses on each wire V appear successively due to the sequential pulse outputs of generator G and may be further processed to improve the signal/ noise ratio. The receivers H 1 -H n may be shipborne hydrophones. In a second embodiment (Fig. 4, not shown) a second register and matrix may be used, the reading wires of one matrix being connected in series with those of the second matrix to permit the use of an increased number of hydrophones without increasing the reading period. In a third embodiment (Fig. 5, not shown) signals from the several receivers H may be encoded by a single binary coder (N k ).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR945645A FR1375850A (en) | 1963-08-26 | 1963-08-26 | Magnetic sequential scan memory |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1075375A true GB1075375A (en) | 1967-07-12 |
Family
ID=8811150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3378264A Expired GB1075375A (en) | 1963-08-26 | 1964-08-18 | Signal source direction detecting system |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1278891B (en) |
FR (1) | FR1375850A (en) |
GB (1) | GB1075375A (en) |
NL (1) | NL6409890A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2009457C1 (en) * | 1970-02-28 | 1991-07-18 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De | |
US4170766A (en) * | 1978-01-27 | 1979-10-09 | Raytheon Company | Beamformer |
NO813644L (en) * | 1980-12-31 | 1982-07-01 | Mobil Oil Corp | MEASURES OF SEISMIC INVESTIGATION |
-
1963
- 1963-08-26 FR FR945645A patent/FR1375850A/en not_active Expired
-
1964
- 1964-08-18 GB GB3378264A patent/GB1075375A/en not_active Expired
- 1964-08-25 DE DE1964C0033710 patent/DE1278891B/en active Pending
- 1964-08-26 NL NL6409890A patent/NL6409890A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6409890A (en) | 1965-03-01 |
DE1278891B (en) | 1968-09-26 |
FR1375850A (en) | 1964-10-23 |
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