Internet visualisation of the operating state of a solar thermal system enables authorised people to fully access the system at any time from anywhere. To realise online visualisation based on an embedded system, the Java programming language is adequate. Java [5] goes back to a project to develop a simple and platform-independent programming language for consumer electronics from 1991. In 1996 Internet browsers from Netscape (Netscape Navigator/Netscape Communicator) and Microsoft (Internet Explorer) have been enabled to download Java programmes from the Internet and to execute the code within the browser. The programmes, so-called applets, have the advantage that they run locally on the machine executing the web browser. The resource­consuming and compute-intensive graphics rendering for visualisation is completely done on the client PC, so that the embedded systems resources are not used too much.

Letztes Update: 31.03.04, 0ft24:05Uhi

Fig. 4: Java applet for visualisation of system performance