Field sprayer nozzle pattern monitor
US4905897A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Jun 17, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A field sprayer nozzle monitor comprises a sensor head in the form of an L-shaped horn device which is clamped onto the nozzle cap by way of a slot which receives the fin of the nozzle cap. The horn includes a mouth which receives sound from the spray nozzle and transmits it to a microphone protected with the horn. A central processor unit receives signals from each of the sensors in turn and processes those to compare with a predetermined calibration signal to determine which nozzles are blocked or faulty. The selection between two different frequencies can be made for different nozzle types. A dynamic averaging system is used to accommodate changes which take place at all nozzles which are independent of fault at the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.