## 5 Seed Displacer Seed-Filling Performance Bench Tests
### Test Results and Analysis
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Analyze the Project**} & \multicolumn{4}{c}{**Considerations**} \\ \cline{2-5}  & **Seed Dispenser Style** & **Seed Discharge Disk** & **Fan Negative Pressure** & \multirow{2}{*}{**Hole Diameter D**} \\  & **A** & **Speed B** & **Value C** & \\ \hline \(K_{1}\) & 17.14 & 12.75 & 14.05 & 11.59 \\ \(K_{2}\) & 13.06 & 12.82 & 11.59 & 12.77 \\ \(K_{3}\) & 6.91 & 11.54 & 11.55 & 12.75 \\ \(k_{1}\) & 5.71 & 4.25 & 4.68 & 3.86 \\ \(k_{2}\) & 4.35 & 4.27 & 3.86 & 4.26 \\ \(k_{3}\) & 2.30 & 3.85 & 3.85 & 4.25 \\ \(R\) (extreme variance) & 3.41 & 0.42 & 0.84 & 0.40 \\ quadratic sum & 19.36 & 0.38 & 1.42 & 0.37 \\ mean value & 9.68 & 0.19 & 0.71 & 0.19 \\ (number of) degrees of freedom (physics) & 2 & 2 & 2 & 2 \\ F-value & 69,695.74 & 1380.22 & 5101.68 & 1341.90 \\ significance & ** & * & ** & * \\ order of priority & & & A \(>\) C \(>\) B \(>\) D & \\ optimal combination & & & A\({}_{3}\)B\({}_{3}\)C\({}_{3}\)D\({}_{1}\) & \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Leakage rate test results. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Analyze the Project**} & \multicolumn{4}{c}{**Considerations**} \\ \cline{2-5}  & **Seed Dispenser Style** & **Seed Discharge Disk** & **Fan Negative Pressure** & \multirow{2}{*}{**Hole Diameter D**} \\  & **A** & **Speed B** & **Value C** & \\ \hline \(K_{1}\) & 268.01 & 273.53 & 271.55 & 273.83 \\ \(K_{2}\) & 282.49 & 275.97 & 275.35 & 275.06 \\ \(K_{3}\) & 274.22 & 275.22 & 277.82 & 275.83 \\ \(k_{1}\) & 89.34 & 91.18 & 90.52 & 91.28 \\ \(k_{2}\) & 94.16 & 91.99 & 91.78 & 91.69 \\ \(k_{3}\) & 91.41 & 91.72 & 92.61 & 91.94 \\ \(R\) (extreme variance) & 4.82 & 0.81 & 2.09 & 0.66 \\ quadratic sum & 38.89 & 1.00 & 6.88 & 0.87 \\ mean value & 19.45 & 0.50 & 3.44 & 0.44 \\ (number of) degrees of freedom (physics) & 2 & 2 & 2 & 2 \\ F-value & 484.46 & 12.51 & 85.66 & 10.84 \\ significance & * & & & \\ order of priority & & A \(>\) C \(>\) B \(>\) D & & \\ order of priority & & A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{3}\) & & \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Suction seed pass rate test results. When checking the seed-filling performance of a pneumatic seed, ensuring the seed suction qualification rate is the first factor to be considered [20]. Combined with the results of the orthogonal test and its extreme deviation and ANOVA analysis, the optimal combination of working parameters of the seeder was selected as A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{3}\), i.e., the style of seed discharging disk is a linear serrated disk. The speed of the seed discharge disk is 40 rpm. The value of the negative pressure of the fan is \(-2500\) Pa, and the diameter of the typed hole is 1.2 mm. To ensure the accuracy of the best parameter combination, the best parameter combination A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{3}\) obtained was compared with the best parameter combination A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{1}\) in the orthogonal test table, and each group of tests was repeated five times. The average value was taken as the final test result of each group of tests. The test results are shown in Table 7. As can be seen from the table, the seed dispenser in the parameter combination of A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{3}\) under the working conditions was the seed dispenser where suction seed qualification rate or leakage suction rate was better when compared with the parameter combination of A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{1}\). Therefore, the best determinant for the seed dispenser is the filling performance of the best working parameter combination of A\({}_{2}\)B\({}_{2}\)C\({}_{3}\)D\({}_{3}\). At this time, the seed dispenser suction seed qualification rate was 95.32%, and the leakage suction rate was 3.11%, compliant with relevant requirements [35; 36].