The vehicle electrical system has become more and more complex over the years. Thus the error probability increases, but an accurate fault identification and isolation becomes more and more difficult. In today's systems, there are already several sensors that measure current or voltage at specific points, but they are mainly for a self-diagnosis purpose of individual control units. The number of sensors would have to be significantly increased for enabling previously used methods to monitor the entire wiring system.
A German university developed an on-board power supply system (pps)-monitoring that processes the measured data of the existing sensors in a central monitoring unit and calculates the overall state of the on-board network with a high accuracy. The system can identify faults by modeling the power network and making reasonable assumptions about possible errors and sources of errors. Faults in electrical branches, which are not directly accessible by sensors, can also be detected with the on-board pps-monitoring.
With this system all relevant faults can be modeled, detected and isolated. In addition to classic fault models, e.g. (creeping) short circuits, line breakages, contact loss, aging / corrosion / contact deterioration or loose contacts, also complex fault events, e.g. arcs in 48 V vehicle networks, can be detected. It can be used in the planning process of a power network. By optimizing the distribution of measuring points, a complete monitoring of the on-board network can be achieved with a minimum number of sensors.
The university is offering a license agreement and a research cooperation agreement in order to enhance this technology and adapt it to the needs of the partner organisations or their customers. This profile addresses companies and institutes dealing with automotive and electric power supply or on-board grid.