JPS6441800A - Proximity fuse - Google Patents
Proximity fuseInfo
- Publication number
- JPS6441800A JPS6441800A JP62197002A JP19700287A JPS6441800A JP S6441800 A JPS6441800 A JP S6441800A JP 62197002 A JP62197002 A JP 62197002A JP 19700287 A JP19700287 A JP 19700287A JP S6441800 A JPS6441800 A JP S6441800A
- Authority
- JP
- Japan
- Prior art keywords
- code
- enemy
- bit
- make
- modulated
- 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
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
PURPOSE: To make detection by the enemy difficult, make the enemy's interruption hard to occur, and enable clearly setting the operational range by subjecting transmission wave to spectrum diffusion and by effecting correlation inside. CONSTITUTION: A transmission wave produced by an oscillator 1 is modulated by a modulator 3 by means of spread spectrum code produced by an encoder 10 so that by expanding a frequency band width the detection by the enemy is made difficult. Even if there should be the enemy's interruption, an output of the modulator 3 is delayed using a delay line 4 by a time corresponding to 1 bit of the encoder 10 so as to make the output of a video amplifier 8 of a receiving signal correlate respectively to the code 1 bit in advance and the code 1 bit in the rear of the transmission signal with a first correlating device 12a and a second correlating device 12b. Since an interrupting wave not yet modulated by the same code as the modulated code is inversely diffused and put out of Doppler filter 13a, 13b bands. Therefore, while being strengthened against interruption, the operating range is designed to be limited to a distance corresponding to the time taken for a radio wave to make a return which has only a lag of 1 bit from the transmission signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197002A JPS6441800A (en) | 1987-08-06 | 1987-08-06 | Proximity fuse |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62197002A JPS6441800A (en) | 1987-08-06 | 1987-08-06 | Proximity fuse |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6441800A true JPS6441800A (en) | 1989-02-14 |
Family
ID=16367178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62197002A Pending JPS6441800A (en) | 1987-08-06 | 1987-08-06 | Proximity fuse |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6441800A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0650075A (en) * | 1992-07-31 | 1994-02-22 | Akabira Boring Service Kk | Automatic monitoring system for curving of hole |
US7423472B2 (en) | 2005-03-28 | 2008-09-09 | Matsushita Electric Industrial Co., Ltd. | Power switching circuit |
-
1987
- 1987-08-06 JP JP62197002A patent/JPS6441800A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0650075A (en) * | 1992-07-31 | 1994-02-22 | Akabira Boring Service Kk | Automatic monitoring system for curving of hole |
US7423472B2 (en) | 2005-03-28 | 2008-09-09 | Matsushita Electric Industrial Co., Ltd. | Power switching circuit |
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