JPH0215172B2 - - Google Patents
Info
- Publication number
- JPH0215172B2 JPH0215172B2 JP57211714A JP21171482A JPH0215172B2 JP H0215172 B2 JPH0215172 B2 JP H0215172B2 JP 57211714 A JP57211714 A JP 57211714A JP 21171482 A JP21171482 A JP 21171482A JP H0215172 B2 JPH0215172 B2 JP H0215172B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- height
- measurement
- control
- ultrasonic waves
- 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
- 238000005259 measurement Methods 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 description 3
- 238000009333 weeding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
- G05D1/02—Control of position or course in two dimensions
- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0255—Control of position or course in two dimensions specially adapted to land vehicles using acoustic signals, e.g. ultra-sonic singals
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Harvester Elements (AREA)
- Safety Devices In Control Systems (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57211714A JPS59100916A (ja) | 1982-12-01 | 1982-12-01 | 農作業機 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57211714A JPS59100916A (ja) | 1982-12-01 | 1982-12-01 | 農作業機 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59100916A JPS59100916A (ja) | 1984-06-11 |
| JPH0215172B2 true JPH0215172B2 (OSRAM) | 1990-04-11 |
Family
ID=16610378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57211714A Granted JPS59100916A (ja) | 1982-12-01 | 1982-12-01 | 農作業機 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59100916A (OSRAM) |
-
1982
- 1982-12-01 JP JP57211714A patent/JPS59100916A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59100916A (ja) | 1984-06-11 |
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