MICROCONTROLLER BASED ELECTRO HYDRAULICALLY AUTOMATIC DEPTH CONTROL SYSTEM FOR TRACTOR MOUNTED IMPLEMENTS
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Date
2021
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Journal ISSN
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Publisher
Dr.RPCAU, Pusa
Abstract
The tractor is a major source of power among all the sources of power for agriculture
as it has diversified applications. The most commonly operations are field
preparation, sowing and interculturing. In all those operations, depth is important
factor which is most important parameter in precision agriculture. During farm
operation for the operator, it‟s very difficult to maintain the recommended depth of
operation without any indication and also have point to point variation in agriculture
field. Therefore, a project was undertaken to develop a continuous depth measurement
and its control system according to the pre-defined value of depth. A rotary
potentiometer measured the depth by sensing the rotation of rockshaft of tractors
hydraulic which was displayed digitally. A keypad was used to set the desired depth
operation by operator. A stepper motor was connected with the position control lever
to control the depth according to the signal getting from microcontroller. The
microcontroller compares the input of pre-define depth with real time measured depth
and sends the signal to stepper motor to lower/raise the depth as per need. The error in
the real time depth measurement was 6.05% and 4.58% when evaluated without and
with implement respectively in stationary condition. The automatic depth control
system was also evaluated with the simulator as well as tractor and found the depth
was well within the ±10% of the pre-defined depth.