ロータリ耕うん機による整地耕うん (第4報)

引張変換形耕深計の開発

抄録

Heretofore attempts have been made to measure the tilled depth more accurately and automatically, but so far no practical method has been found. The tilling depth meter developed by the author is primarily for measuring tilled depth continuously and automatically, and has the following features:
1) The basis for variation in tilled depth is the ground surface which is the working collation.
2) For the actual ground surface such as roughness and slope, it always measures tilled or worked depth in the vertical direction.
3) Independent of dynamic variation and change of position due to other causes of the operating machine, it measures its change of the working parts relative to the ground surface.
4) Together with various power measurements of the working parts, the measurements synchronized to the same recording equipment may be carried continuously and automatically.
5) The tilled depth relative to the tilled width may be measured as a mean tilled depth.
6) Matching when make and size of the operating machine are different and matching for various ground hardness is possible by adjusting or inter-changing the ground measuring parts.
7) Since the tilled depth and measuring error are in a linear relation, it is possible to know tilled or worked depth at once during working operation.
It may be applied not merely to a description of tilled depth but of wheel sinkage and shape of ground surface, etc. It may be applied either to a real field or artificial one in laboratory. The tilling depth meter has been used in practice ever since the second report.