Övervakningssystem för båtelektronik

Sammanfattning

Leisure boats of today have a lot of electronics that needs battery power to work. In addition

to that electric propulsion systems have gotten more popular lately, which further increases

the demand for high battery capacity. The batteries used are mostly lead-acid batteries and to

get the most out of the batteries it is important to treat them right. To optimize the electric

system it is important to have knowledge of how the batteries and the electric motor are used

and which factors affect e.g. efficiency and recharging.

A new electric drive that can replace old diesel engines is being developed and needs testing

and evaluation. To efficiently develop the electric drive a monitoring system which reads and

logs important parameters is needed. Furthermore the state of charge of the batteries needs

to be monitored and a method for controlling recharging from the propeller created.

Electronics to achieve this needs to be created and and its function verified.

To create the monitoring system the electric drive was first studied and the parameters

needed for further development, monitoring of the batteries, and controlling of the propeller

charging were determined. Thereafter electronics for monitoring the different parameters

were created one by one and then combined to a unit. Basic software to control the

electronics and communicate with a computer was created and lastly the function of all the

components was verified.

The result is a monitoring system which reads the necessary parameters and present them to

the user on a control panel. Fundamental programming is finished but work is needed on

more advanced software. The unit is capable of logging data with adequate accuracy and send

the data to a computer over a USB-bus.