Method for calculating depth of sprayed water of translational sprinkler in different working conditions

A method for controlling the movement and speed of a translational sprinkler in different working conditions comprising the following steps:

• a) placing rain gauge buckets with water-receiving opening in diameter D in n rows and m columns, at spacing a between the rows and between the columns, within the sprinkling radius range of sprinkler heads in the travel direction of the translational sprinkler, to collect sprinkled water droplets;
• b) selecting an working pressure of the translational sprinkler, to maintain the translational sprinkler in a state of stable sprinkling at fixed spots, and logging the volume of water droplets cξ received in each rain gauge bucket within sprinkling time t1, wherein ξ=1, 2, 3, . . . , m×n, calculating average volume of water droplets ci=cξ/m received in the rain gauge buckets in each row, wherein i=1, . . . , n, repeating the above-mentioned process for b times, calculating average volume of water droplets νi=Σj=1bcij/b received in the rain gauge buckets in each row, wherein i=1, 2, 3, . . . , n, j=1, 2, 3, . . . , n, and calculating spot sprinkling intensity
• d
• i
• =
• v
• i
• /
• [
• π
• ·
• (
• D
• 2
• )
• ·
• t
• 1
• ]
• ,
• wherein i=1, 2, . . . , n;
• c) establishing a relation curve of spot sprinkling intensity vs. distance from center:
• numbering the rain gauge buckets by the sequence of passing of the translational sprinkler as rain gauge bucket 1, rain gauge bucket 2, rain gauge bucket 3, . . . , rain gauge bucket n−1, and rain gauge bucket n, and plotting a relation curve of sprinkling intensity vs. distance from a sprinkler head at a center of the sprinkler heads, with the sprinkler head at the center as an origin, the distance of rain gauge bucket from the sprinkler head as x-axis, and the sprinkling intensity of sprinkler head as y-axis, and establishing a functional relationship d=f(L), wherein d is the sprinkling intensity, and L is the vertical distance of the sprinkler head at a center of the rain gauge buckets;
• d) setting a movement speed s of the translational sprinkler, establishing a mathematical curve of d=f(t) according to L=st and wherein t is time, and converting the relation curve of sprinkling intensity vs. distance from the sprinkler head at the center into a relation curve of sprinkling intensity vs. time t;
• e) setting the time required for the translational sprinkler to pass by a rain gauge bucket completely as t2, calculating a depth of sprinkled water H=∫0t2 f(t)dt collected after the translational sprinkler passes by the rain gauge bucket completely, which is the depth of sprinkled water at the rain gauge bucket in a travel cycle of the translational sprinkler;
• and
• f) controlling, based on the depth of sprinkled water at the rain gauge bucket in the travel cycle of the translational sprinkler, the movement speed s of the translational sprinkler to realize a desired depth of sprinkled water for sprinkling irrigation.