More data and an increased need for testing
The automotive industry’s requirements from measurement and testing technology are currently undergoing highly dynamic change. The trend towards autonomous driving places even greater demands on system safety and reliability with an accompanying increase in vehicle complexity.
More sensors, software and connectivity are making systems more prone to errors so they require additional testing at increased intensity and accuracy.
To avoid expensive recalls, testing by suppliers and OEMs often go above and beyond VDA and IATF requirements. Such testing mainly involves service-life testing, environmental simulation and long-term measurements.
Trends in measurement and testing technology
- The need for testing during development is increasing. The long-term stability of complex vehicle systems must be guaranteed even under harsh environmental conditions.
- Test stands are able to process increasingly large amounts of data at even greater speeds. Data evaluation takes place during testing with remote access to results.
- Testing technology is becoming faster and performed at higher resolutions with unlimited recording of measurement series and test results being traceable at all times.
Large data volumes, more flexible and powerful analyses
- Increasingly complex test scenarios. Vehicles are becoming increasingly complex thereby requiring a more flexible and efficient test environment. Measuring, control and monitoring tasks as well as evaluation functions are integrated into a single system and also performed without the need for PC support. Test stand applications can also be individually adapted and testing procedures fully automated.
- Increasingly large data volumes. Component service-life testing often requires very large volumes of data measuring one or more terabytes. Such data volumes need to be recorded, analysed and archived in a tamper-proof way. Measurement data is securely stored with a date stamp and accessible even in the event of power failures. If a PC or hard disk fails, integrated backup mechanisms ensure data security, e.g. by storing data on NAS drives.
Measurement and testing technology for automotive requirements
- Example of environmental simulation in a climate chamber: A manufacturer's vehicle components are subjected to thermal and mechanical stress tests around the clock in long-term testing. Different temperatures, pressures, flow values, corrosion patterns and vibration stresses undergo simulation in a shaker using Delphin Message devices. ProfiSignal Klicks software enables the climate chamber and test samples to be monitored from the workplace.
- Example of automation of the service-life testing: An automotive supplier tests the service life of fans under various environmental conditions. Individually created test profiles are used by a test device to automatically set variable speeds and the required controls are tested according to ambient temperatures. Control functions take place using analog, digital and PWM outputs .
- Example of mobile and stand-alone data acquisition: Driving tests are used to test and evaluate components and systems under real conditions. The Loggito and Expert Logger devices are used as mobile and autonomous data loggers. Due to their ability to operate as stand-alone devices, their 12/24 volt power supplies and their interfaces, the devices are ideally suited for these tasks. Engine speed and other parameters are recorded via a CAN bus and the position, speed and distance travelled are recorded via a GPS sensor.