 Skin-shaped product of aminoplast resin mixture and fibrous material |
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| Material-web marking by means of bar code |
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| Multi-pole circuit breaker |
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| Cuspated sheet forming |
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| Method for making metallic glass powder |
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| Metallic glass powders from glassy alloys |
| OF THE INVENTION Metallic glass alloy powders are prepared according to a process involving first ... |
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| Embrittling of glass alloys by hydrogen charging |
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| Process for the production of titanium-based alloy members by powder metallurgy |
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| Amorphous alloys for magnetic head core and video magnetic head using same |
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Radar device
| Details |
Inventors: Aoyagi, Yasushi; Fukuchi, Toshihide; Inoue, Kiyoshi; Kohno, Ryuji;
Assignee: The Furukawa Electric Co., Ltd. (Tokyo, JP)
Primary Examiner: Sotomayor; John B.
Assistant Examiner:
Attorney, Agent or Firm: Frishauf, Holtz, Goodman, Langer & Chick, P.C.
A radar device transmits an electric wave whose band is spread by a PN code, receives a reflected wave of the electric wave from an object 10, detects correlation between a received signal and a PN code which is delayed, and thereby detects the object. A receiving part 18 connects three receiving antennas 16a.about.16c sequentially one by one, thereby to receive a reflected wave from an object. The three receiving antennas are arranged having their directions so staggered that their antenna beam patterns partly overlap with each other. A correlation detection circuit 19 detects such a slide width that a value of correlation between a received signal received by each of the antennas and the PN code exceeds a predetermined threshold. An operation part 12 obtains an azimuth of an object based on the detected slide width and beam pattern characteristics of the antennas. |
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DETAILED DESCRIPTION We claim: 1.
A radar device which transmits an electric wave, receives a reflected wave of said electric wave from an object, and thereby detects said object, said radar device comprising: a plurality of antennas each having an antenna beam pattern having a predetermined directivity, said antennas being arranged such that the antenna beam patterns of said antennas are adjacent to each other, and the antenna beam patterns are partly overlapping with each other, frequency measurement means for measuring a frequency of how often said object is detected by each of said antennas, and azimuth measurement means for obtaining an azimuth of said detected object, based on (i) said measured frequency for each of said antennas and (ii) beam pattern characteristics of each of said antennas.
2.
A radar device according to claim 1, wherein said azimuth measurement means calculates a detection probability of said object based on said measured frequency, obtains in advance a relation between detection probability and azimuth based on said beam pattern characteristics of said antennas, and obtains an azimuth of said object based on said calculated detection probability and said relation between detection probability and azimuth.
3.
A radar device which transmits an electric wave, receives a reflected wave of said electric wave from an object, and thereby detects said object, said radar device comprising: a plurality of antennas each having an antenna beam pattern having a predetermined directivity, said antennas being arranged such that the antenna beam patterns of said antennas are adjacent to each other, and the antenna beam patterns are partly overlapping with each other, frequency measurement means for measuring a frequency of how often said object is detected by each of said antennas, signal strength measurement means for measuring a strength of a received signal from said object, received by each of said antennas, and azimuth measurement means for obtaining an azimuth of said detected object, based on (i) said measured frequency for each of said antennas, (ii) said measured signal strength and (iii) beam pattern characteristics of each of said antennas
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Radio 
