JPS5638610A - Automatic steering unit in tractor - Google Patents
Automatic steering unit in tractorInfo
- Publication number
- JPS5638610A JPS5638610A JP11486779A JP11486779A JPS5638610A JP S5638610 A JPS5638610 A JP S5638610A JP 11486779 A JP11486779 A JP 11486779A JP 11486779 A JP11486779 A JP 11486779A JP S5638610 A JPS5638610 A JP S5638610A
- Authority
- JP
- Japan
- Prior art keywords
- outputs
- differential amplifier
- uncultivated
- steering wheel
- sensor
- 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
- ONFPUQOPHZOEKF-KXUCPTDWSA-N (3R,4R)-3-[(1S)-1-hydroxyhexyl]-4-(hydroxymethyl)oxolan-2-one Chemical compound CCCCC[C@H](O)[C@H]1[C@H](CO)COC1=O ONFPUQOPHZOEKF-KXUCPTDWSA-N 0.000 abstract 1
Landscapes
- Guiding Agricultural Machines (AREA)
- Steering Controls (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Abstract
PURPOSE: To suppress the level variance due to lack of uniformity of reflection factor on uncultivated area, by setting the reference level when the boundary between uncultivated and cultivated areas is detected with three sets of photoelectric sensors, lower than the intermediate level of both the sensor outputs of uncultivated and cultivated areas.
CONSTITUTION: The outputs VA, VB, VC of the uncultivated area sensor 20A, boundary line sensor 20B, and cultivated area sensor 20C are fed to the differential amplifiers 25, 26, 27 and the outputs VA-VB and VB-C are fed to the differential amplifier 29 to be used as the signal controlling the steering wheel. The differential amplifier 29 receives the bias voltage VX to shift the reference level. Further, the gain of the differential amplifier 29 is changed by changing the feedback resistance according to the outputs VA-VC. The CPU31 obtains the driving direction and amount of steering wheel depending on the polarity and value of the output of the differential amplifier 29 and feeds it to the driving circuit for steering wheel 33.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11486779A JPS5638610A (en) | 1979-09-07 | 1979-09-07 | Automatic steering unit in tractor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11486779A JPS5638610A (en) | 1979-09-07 | 1979-09-07 | Automatic steering unit in tractor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5638610A true JPS5638610A (en) | 1981-04-13 |
Family
ID=14648670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11486779A Pending JPS5638610A (en) | 1979-09-07 | 1979-09-07 | Automatic steering unit in tractor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5638610A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0217970A (en) * | 1988-07-05 | 1990-01-22 | Tokyo Copal Kagaku Kk | Method and apparatus for applying powder |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5266286A (en) * | 1975-12-01 | 1977-06-01 | Hitachi Ltd | System for detecting guide band of vehicle |
JPS53147384A (en) * | 1977-05-27 | 1978-12-22 | Hitachi Ltd | Operational controller of unmanned travelling car |
-
1979
- 1979-09-07 JP JP11486779A patent/JPS5638610A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5266286A (en) * | 1975-12-01 | 1977-06-01 | Hitachi Ltd | System for detecting guide band of vehicle |
JPS53147384A (en) * | 1977-05-27 | 1978-12-22 | Hitachi Ltd | Operational controller of unmanned travelling car |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0217970A (en) * | 1988-07-05 | 1990-01-22 | Tokyo Copal Kagaku Kk | Method and apparatus for applying powder |
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