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Wind tunnel measurement of spray drift from on-off controlled sprayer nozzles
Publikation: Konferencebidrag › Poster › Forskning
- Ivar Lund, Syddansk Universitet, Danmark
- Peter Kryger Jensen
- Paul Miller, Silsoe Spray Applications Unit, Silsoe, Bedford, Storbritannien
- Andrew Lane, Silsoe Spray Applications Unit, Silsoe, Bedford, Storbritannien
- Christine O'Sullivan, Silsoe Spray Applications Unit, Silsoe, Bedford, Storbritannien
Sensor-based precision weed control system at a high resolution requires a high spray application accuracy to keep the spray in a small target zone. The objective of this research was to investigate the target accuracy and spray drift from individual controlled sprayer nozzles targeting a 250 mm wide surface area with a length of 200 mm. The test was conducted in the wind tunnel at Silsoe Spray Applications Unit in the UK. The measurements consisted of two test series; airborne drift was collected on polyethylene lines more than 375 mm away from the centerline of the nozzle and ground deposits were collected on 20 mm wide paper lines closer than 375 mm from the nozzle. The nozzle height was 400 mm and the nozzle was aligned at right angles to forward direction across the wind tunnel and perpendicular to the wind direction.
The nozzles involved were mounted on a transporter system and arranged to deliver a pulse of spray using the WeedSeeker valve. The tests were conducted to determine accumulated spray deposit at different crosswind and forward speeds. In general, the deposits, especially those measured downwind close to the target zone showed significant increase as the crosswind speed is increased. Besides the uniformity of the spray distribution in the target zone was disturbed by increasing forward speed and crosswind. Detailed results will be presented on the poster.
The nozzles involved were mounted on a transporter system and arranged to deliver a pulse of spray using the WeedSeeker valve. The tests were conducted to determine accumulated spray deposit at different crosswind and forward speeds. In general, the deposits, especially those measured downwind close to the target zone showed significant increase as the crosswind speed is increased. Besides the uniformity of the spray distribution in the target zone was disturbed by increasing forward speed and crosswind. Detailed results will be presented on the poster.
| Originalsprog | Engelsk |
|---|---|
| Udgivelsesår | 2014 |
| Antal sider | 1 |
| Status | Udgivet - 2014 |
| Begivenhed | IUPAC Symposium on Formulation and Application Technologies for Sustainable Crop Protection - San Fracisco, USA Varighed: 12 aug. 2014 → 13 aug. 2014 |
Konference
| Konference | IUPAC Symposium on Formulation and Application Technologies for Sustainable Crop Protection |
|---|---|
| Land | USA |
| By | San Fracisco |
| Periode | 12/08/2014 → 13/08/2014 |
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