Justification of a method for determining the moment for switching on the level one signaling of filled grain harvester hoppers

Unloading time of the harvester hopper at standstill depends also on the duration of the operations performed by the transport vehicle as time from the commencement of the harvester signalling to the start of the transport vehicle and the time from the start of the transport vehicle till its arrival under the unloading screw of the grain harvester. The time measuring of the operations established that the average time of commencement of the harvester signalling until the start of the transport vehicle was 215.5 s, and the time for moving of the transport vehicle to the grain harvester was 222 s. It was found that in 49% of the duration of the operations the drivers of the transport vehicles wait before going to the grain harvester (from the total of 437.5 s). This is due to the incorrect setting of the time of commencement of the first level signalling, which prevents drivers from starting and respectively arriving at the exact moment at the harvesters. It has also been found that the unloading of the harvester grain hopper takes place immediately after the arrival of the transport vehicles at it and therefore a non-filled hopper is unloaded. As a result, about 1 m³ of the harvester hopper is not used and also the number of its stops for unloading increase by about 11%, practically reducing its productivity. Keywords: grain harvester, unloading the grain harvester hopper, productivity, signaling about the grain level in the hopper, joint work of harvester and transport vehicle. ARTTEApplied Researches in Technics, Technologies and Education

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Duration of Operations Performed by Transport Vehicles During Unloading of the Grain Harvester Hopper

Tihanov¹

2018

“…These losses, as a rule, are the greatest in unfavorable climatic conditions. Of great importance is the overall logistics of the process that is related, both to the proper organization and to the choice of different ways and means of performing the individual operations [17]. The successful and timely harvesting of the grain crops depends both on the type of technique used and the organization of its use [6].…”

Section: Introductionmentioning

confidence: 99%

“…to perform the various operations in strict sequence and without interruption [4]. In practice, co-ordination between harvesters and vehicles is carried out by the signalling devices on grain harvesters for filled hoppers [17]. The lack of such coordination is a prerequisite for idling that leads to an extension of the harvest period [1,6,12,13].…”

Section: Introductionmentioning

confidence: 99%

Study on the Method of Grain Harvester Hopper Unloading and Full Hopper Signalling Used

Tihanov¹,

Petkova²,

Tsatsarov³

2018

The paper presents a study on the method of grain harvester hopper unloading and the full hopper signalling used. The studies were conducted on 42 farms. Of these, it was found that only 9% of the farms were unloaded on the move, in the remaining 91% the harvesters unloaded at standstill. It has been found that on the studied farms harvesters used the following types of full hopper signalling: no automatic signalling (signalling by stopping and opening of the unloading screw) - 8%; with one level of automatic signalling - 6%; with two levels of automatic signalling - 73%; do not use signalling, but go out for unloading at the end of the field after filling the hopper - 13%. Harvesters that had to alert the vehicle for full grain hopper were a total of 62, 84% of which having two levels of automatic signalling, 6% with one level of automatic signalling and 10% without signalling.

“…The successful and timely harvesting of cereals depends both on the type of machinery used and the organization of its use. Coordination between harvesters and vehicles is carried out by means of harvester signallisations for hopper filling [6]. In harvesters without automatic signalling or older generations of harvesters the hopper filling is monitored through an observation window.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of the Type of Full Hopper Signalling Used in Grain Harvesters on the Time for the Grain Hopper Unloading

Tihanov¹

2018

The paper has established the length of the time for unloading hoppers in harvesters using a different signaling mode for full hopper: without automatic signalling - 245.35 s; with one level of automatic signalling - 224.5 s; with two levels of automatic signalling - 208.82 s and for harvesters unloading in the vehicle located at the end of the field - 301.46 s. Dispersion analysis has been carried out proving the effect of the type of signalling for full hopper used on the total time for unloading the hopper at a significance level of a = 0.05. Through it the interaction between the factor: type of signalling used on the time for unloading the hopper tp has also been established.