Conferences and supporting programme
Sensor Simulation - Validation of Safety-related Sensors with Real Time Capability
In the automotive industry the number of electronic control units (ECU) and the number of functions increases every vehicle generation. More and more functions need information about the environment of the vehicle. Because of that the number of sensors is increasing. Beside the sensors with analog or PWM interfaces more and more digital sensors interface like SPI, SENT or PSI5 become important in the development of automotive ECUs. This interface leads to new requirements for the development and test. For the development and test it is necessary to simulate the sensor values and the behavior in the case of faults of the sensor in real time. With a real sensor not all possible behaviors and tolerances can be caught. Compared to the simulation of analog or PWM signals the simulation of sensors with a digital interface is much more complex. The sensor provides, beside the sensor signal, more and more diagnostic and configuration information. For safety relevant applications (e.g. according to ISO26262) it is necessary to test all elements of the sensor communication with focus on the fault detection. The currently available sensor simulation methods don't provide the possibility of a real time simulation. Over the mostly used USB interface it is only possible to program fixed values or predefined signal sequences. The introduced simulation platform provides the possibility to simulate sensor values in real time, which means a response time below 1µs. The system uses one CAN interfaces for the integration in the test system. It is possible to simulate the real and dynamic behavior of a sensor in a simulated test environment like a HIL system or a PC on the workplace of a development engineer. The presented system of the iSyst Intelligente Systeme GmbH allows the simulation of sensor with a SPI, PSI5, LIN or SENT interface. This solution enables the engineer to accomplish an effective development and the test of sensors with digital interfaces in safety relevant area, too. The presentation shows the possibilities and limits of the sensor simulation platform. The advantages of the presented solution are illustrated by results from real test projects. Currently there are no suitable solutions for the simulation of sensors in real-time. This is necessary for development and testing. The presented solution enables the simulation of sensors in real time. The simulation of sensor values and the injection of errors is possible. Based on the used CAN interface, the solution can be easily integrated into existing test systems. Furthermore, it is easy to use at the developer's workstation.
--- Date: 01.03.2018 Time: 10:30 AM - 11:00 AM Location: Conference Counter NCC Ost