Investigate a Simple Design for Sweet Potato Harvesting

Connection of the Radish Seed's Physical Characteristics with the Bottom Holes Design of the Seeder Device

“…-The seed sphericity  was calculated by Mohsenin (1986) and Ismail et al (2014) equation -For the calculation of each of the mean seeds of geometric diameter (Dg, mm) and the arithmetic diameter (Da, mm) of radish seeds, the following equations were used (Seyed and Elnaz, 2006):…”

Design and Experimental Study of Potato-Soil Separation Device for Sticky Soils Condition

“…For the separation device, its design plays a decisive role in the soil separation effect. Numerous research have been done on the innovative design of the separation mechanism, such as swing sieve [14][15][16], lifting chain [13,[17][18][19], rotating disc [20,21], and different types of separation mechanisms are suitable for different soil conditions. Under sticky clay soil conditions, the soil adheres to the surface of the mechanism, making it difficult to separate and break.…”

“…In addition to the structural innovation of the separation mechanism, the structure and operating parameters had been evaluated and optimized by a large number of studies to improve the separation efficiency and reduce damage rate of potato. Regarding the structural parameters, the length [14,25], shape [17], inclination angle, spacing between chain rods [26,27] and arrangement of lifting chain directions [28,29] were considered to have an effect on the separation performance. There were some studies that showed that a new type of lifting chain under the condition of heavy soil had the best harvesting effect when the length of the lifting chain was 3.1 m, the linear speed of the lifting chain was 1.5 m/s, and the forward speed of the machine was 1.2 m/s [22]; a multi-stage separation buffer potato harvester achieved the visible potato rate of 99.1% by selecting a working speed of 1.05 m/s, a digging depth of 180 mm, and a screen inclination angle of 22 • [27].…”

“…Other researchers found that the potato-soil mixture has different motion states on the vibration and wave segments [17]. In terms of operating parameters, numerous studies had revealed the relationship between machine forward speed [4,13,14,16,21], amplitude and vibration frequency of lifting chain [19], and separation screen operating speed [12,17] and harvester separation performance. There are mathematical models showed that forward speed of 1.1 m/s, linear speed of transverse conveyor belt of 1.5 m/s, and circular track speed of 7 r/min were the best combination performances for efficient separation [21].…”