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In order to verify the feasibility of semi-automatic garlic planter with inclined belt program and determine its reasonable operating parameters, the semi-automatic test-bed with inclined belt of garlic transplanting machine was designed, and the garlic box experiments were conducted. The angle of inclined belt on the test-bed and its running speed were adjustable. Single factor test results showed that the program of the semi-automatic garlic planter with inclined belt was feasible, and the angle of inclined belt and the test bed running speed affected the indicators. Orthogonal experiment results showed that the angle of inclined belt was the main factor affecting the test indicators. It is also found that the best angle was 30 degrees, while the most reasonable running speed was 0.75 Km/h.

In order to meet the agricultural requirements of planting garlic [^{2} per day, and the working conditions are very poor. As the labor cost rises year by year, the garlic planting cost greatly increases [

There are two problems of garlic planting machine [

As showed in

The speed of the test-bed was controlled by IPC. When IPC motor is started, the garlic box with garlic seed can be put on the belt manually, which will be transported to the deflector with guidance of the institution of support. The deflector then drops the garlic box into seed ditch stably and completes the progress of planting.

The parameter was shown in

Parameter | |
---|---|

Power | 1 kW |

Rows | 3 |

Belt angle | 0˚ - 40˚ |

Speed | 0 - 1.8 km/h |

tion. The transmission uses triple retarding mechanism in running structure and two-grade reducing mechanism in transport structure to improve the motor speed [

The suitable transmission ratio guarantees the garlic box to fall end to end in seed ditch. This ratio can be fixed according to the test-bed’s running speed and the transport speed of belt.

v―the test-bed’s running speed.

v_{1}―the transport speed of belt.

t―the time from the front end of garlic box N touching ditch to the front end of garlic box F touching seed ditch.

l―the length of garlic box.

From

From the relationship between time and speed of the garlic box on belt, it can be obtained:

From

From Formulas (2) and (3), the result is

According to Formula (4), the transmission ratio can be worked out from the walking wheel’s and belt wheel’s diameter.

The motion of the garlic box on belt and the garlic box front end touching the seed ditch are analyzed to research the tail of garlic box N’s speed and the front end of garlic box F’s speed. In this way the length between two garlic box end to end can be worked out.

When the garlic box is transported on the belt, the speed is v. when the garlic box front end touches the seed ditch, the speed of garlic box tail can be got from

In _{a}―the absolute speed of the garlic box tail when the garlic box front end touches the seed ditch. Number and point change with the transport of garlic box.

v_{e}―the convected speed, the number is same as v.

v_{r}―the relative speed, fixed orientation, number is change with v_{a}.

θ―the angle between the garlic box and earth.

α―the belt angle.

From

From _{r} is increasing with the angle decreasing between garlic box and earth. when θ = 15˚, v_{r} = v. There are three steps in the transport of the garlic boxes: first, before the front end of garlic box N touches the seed ditch, there is no relative motion between the two garlic boxes; the second, when the front end of garlic box N touches the seed ditch to v_{r} = v, in this step v_{r} < v, so the garlic box F will extrude the garlic box N; the third, from v_{r} = v to all of the garlic box N touches the seed ditch, in this step v_{r} > v, the a space will appear

According to the above analysis, the result is that the length between two garlic boxes end to end will appear, when the garlic boxes all touch the seed ditch.

t_{1 }is the time the garlic box transport from state b to state c. so

Because in the time t_{1}, v_{r} > v, the two garlic box F and N will separate, t_{2} is the time the garlic box transport from state b to the head of garlic box F touch earth

In

So the length between two garlic boxes end to end is d,

From Formulas (6) and (10) it can be worked out that the relationship between belt angle and length,

Through test the feasibility of semi-automatic garlic planter with inclined belt program is to be verified and its reasonable operating parameters are to be determined. Field experiment is conducted to make sure that it will never appear slip in every belt angle and at every transport speed after the front end of garlic box touches seed ditch.

Experimental factor: the belt angle, the running speed [

Experimental index: the length between two garlic boxes end to end.

The angle of repose is 43˚ which is the garlic box on belt [

Through the single factor experiment it can be proved that the semi-automatic garlic planter with inclined belt is feasible; Experimental factors have influence on index.

The belt angle and test-bed running speed both have influence on index, so belt angle and test-bed speed are selected to take the orthogonal test [

In test we choose orthogonal experimental design of L_{9}(3^{4}) [

The results are shown in

From

In _{A} = 4.0295 > F_{0.05} = 3.23, but F_{A} = 4.0295 < F_{0.01} = 5.18, so factor A has the greatest effect on experimental index, and the reliability is 95%, while the influence factors of B and interaction of A × B on experimental index are less. Because F_{A} > F_{B}, so the order of each factor which influence the index is A, B.

Because A × B significantly affect the index, binary collocation of factor A, B (_{2}B_{3}.

number | A (angle) | B (speed) | A × B | |
---|---|---|---|---|

1 | 1 (25) | 1 (0.63) | 1 | 1 |

2 | 1 | 2 (0.69) | 2 | 2 |

3 | 1 | 3 (0.75) | 3 | 3 |

4 | 2 (30) | 1 | 2 | 3 |

5 | 2 | 2 | 3 | 1 |

6 | 2 | 3 | 1 | 2 |

7 | 3 (35) | 1 | 3 | 2 |

8 | 3 | 2 | 1 | 3 |

9 | 3 | 3 | 2 | 1 |

The length between two garlic boxes/mm | ||||
---|---|---|---|---|

20 | 25 | 25 | 29 | 25 |

24 | 25 | 20 | 21 | 25 |

24 | 24 | 24 | 21 | 20 |

18 | 23 | 26 | 26 | 22 |

24 | 20 | 19 | 19 | 25 |

26 | 18 | 17 | 21 | 20 |

35 | 26 | 23 | 21 | 24 |

21 | 26 | 22 | 26 | 25 |

24 | 22 | 27 | 21 | 33 |

factor | S | f | S/f | F ratio | significant | F_{α} |
---|---|---|---|---|---|---|

A | 0.903 | 2 | 0.4515 | 4.0295 | ※ | F0.01 = 5.18 |

B | 0.301 | 2 | 0.1505 | 1.3432 | F0.05 = 3.23 | |

E1 | 0.098 | 4 | 0.0245 | F0.10 = 2.44 | ||

E2 | 4.384 | 36 | 0.1218 | F0.25 = 1.44 | ||

E | 4.482 | 40 | 0.11205 | |||

total | 5.686 | 8 |

A_{1} | A_{2} | A_{3} | |
---|---|---|---|

B_{1} | 24.8 | 23 | 25.8 |

B_{2} | 23 | 21.4 | 24 |

B_{3} | 22.6 | 20.4 | 25.4 |

1) The test-bed can plant the garlic box stably; the semi-automatic garlic planter with inclined belt is feasible.

2) The single factor experiment shows that belt angle and test-bed running speed have effect on length between two garlic boxes.

3) Through the orthogonal test, the best test combination is fixed―the belt angle is 30˚ and the test-bed running speed is 0.75 km/h.

4) We should cut down 20 mm at two ends of garlic box to make sure the length between the caves remain unchanged.

ZhaoleiZhang,AijunGeng,11,JianningYang,RuxinLi,JialinHou, (2015) Design and Test of the Semi-Automatic Test-Bed with Inclined Belt of Garlic Transplanting Machine. American Journal of Plant Sciences,06,3298-3305. doi: 10.4236/ajps.2015.619322