JPS6486084A - Radar sensor for short distance - Google Patents
Radar sensor for short distanceInfo
- Publication number
- JPS6486084A JPS6486084A JP24517287A JP24517287A JPS6486084A JP S6486084 A JPS6486084 A JP S6486084A JP 24517287 A JP24517287 A JP 24517287A JP 24517287 A JP24517287 A JP 24517287A JP S6486084 A JPS6486084 A JP S6486084A
- Authority
- JP
- Japan
- Prior art keywords
- short distance
- transmitting
- delay
- delay circuits
- deltaf
- 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 perform measurement at a short distance difficult by a conventional system, by providing a delay circuit in a transmitting or receiving circuit and generating beat frequency even when an actual distance to be measured is 0. CONSTITUTION:Delay circuits 105, 109 are inserted between a transmitting amplifier 104 and a transmitting antenna 106 as well as between a receiving antenna 108 and a receiving amplifier 110. When the delay times of the delay circuits 105, 109 are respectively set to T1, T2, beat frequency fb provides formula (wherein a mark L is the distance from each of the antennas 106, 108 to an object 107 and fp is the repeating cycle of a triangle wave). When planning is performed under condition of L=0 and fbapprox.=10fp, the delay circuits 105, 109 becoming T1+T2=2.5/DELTAF may be provided. In the case of DELTAF=10MHz, T1+T2=0.25mus is formed. By this method, measurement at a short distance difficult by a conventional system becomes possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24517287A JPS6486084A (en) | 1987-09-29 | 1987-09-29 | Radar sensor for short distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24517287A JPS6486084A (en) | 1987-09-29 | 1987-09-29 | Radar sensor for short distance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6486084A true JPS6486084A (en) | 1989-03-30 |
Family
ID=17129676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24517287A Pending JPS6486084A (en) | 1987-09-29 | 1987-09-29 | Radar sensor for short distance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6486084A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04177190A (en) * | 1990-11-13 | 1992-06-24 | Honda Motor Co Ltd | Fm radar |
| JPH04259874A (en) * | 1991-02-15 | 1992-09-16 | Honda Motor Co Ltd | Fm radar |
| US7598903B2 (en) | 2006-05-23 | 2009-10-06 | Korea Advanced Institute Of Science And Technology | Sensor for measuring distance and method for measuring distance using the sensor |
| JP2011223505A (en) * | 2010-04-14 | 2011-11-04 | Mitsubishi Electric Corp | Delay time measurement method |
-
1987
- 1987-09-29 JP JP24517287A patent/JPS6486084A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04177190A (en) * | 1990-11-13 | 1992-06-24 | Honda Motor Co Ltd | Fm radar |
| JPH04259874A (en) * | 1991-02-15 | 1992-09-16 | Honda Motor Co Ltd | Fm radar |
| US7598903B2 (en) | 2006-05-23 | 2009-10-06 | Korea Advanced Institute Of Science And Technology | Sensor for measuring distance and method for measuring distance using the sensor |
| JP2011223505A (en) * | 2010-04-14 | 2011-11-04 | Mitsubishi Electric Corp | Delay time measurement method |
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