NaturaVolt System
One of the problems with the existing system is that there is no qualitative or quantitative way of knowing how much power has been delivered to the weed and whether this is enough to have killed it. Is the job done or is a costly follow up visit needed?
Where Andibee Comes in
NaturaVolt asked Andibee if it would be possible to build a logging device that would be able to measure both the amount of power delivered and also to record the way the power is delivered (for example are the current and voltage in phase?). If the current and voltage can be accurately recorded, cross referenced against the type and size of the weed and potentially the weather conditions, then it may be possible to inform the operator as to whether the application has been successful or not. Do they need to apply more power, or can they be reasonably confident that a return visit will not be needed?
Is this about Efficiency or Efficacy?
Both. Data is a powerful tool for sales and marketing. If you have the data that proves you can do the job, and that data also informs you as to the most efficient way of doing it, then you reinforce the business case to the customer.
The Logger
The logger board provides fully isolated (>1500V) between the mains and the low voltage side, with the ability to measure up to 50A at 230V.
It also provides an additional +5V isolated output to power a logging device (seperate to this board). Three outputs provide current, voltage and +5V down SMA cables as they have to run through a high electric field environment to be available on the outside of the equipment. This will allow us to measure the signals on either an oscilloscope or eventually into ADC channels for longer term in-field logging.
Killing Weeds Without Killing the Environment
The Story So Far
Through one of our directors we have a connection with NaturaVolt, who provide a service to kill weeds using high voltage electricity. This is a completely chemical-free way of controlling weeds, from dandelions to the dreaded Japanese Knot Weed.