Feature: Automotive
An electro-hydraulic control system provides fully variable valve control
the effects of the impact on the vehicle body and passengers. Tese sensors’ high wire acceleration enables them to measure object movement. To optimise braking behaviour and
the pedal travel involved, F50 draw- wire sensors from Micro-Epsilon offer a rotatable potentiometer, which allows the user to select the measurement range within the entire extraction length of 150mm. Te integrated deflection pulley enables the sensor to be flexibly integrated in the footwell or engine compartment.
Combustion engine behaviour Non-contact eddy-current displacement sensors from Micro-Epsilon are proven measuring instruments on combustion engine test benches. In ‘towing’ as well as ‘firing’ mode, non-contact eddy- current displacement sensors detect different parameters that contribute to the improvement of engine characteristics. In particular, the high measuring accuracy provided under harsh conditions in the engine distinguishes the Micro-Epsilon’s eddyNCDT sensors.
Speed of electric motors Te development of electric motors has seen a requirement for speed measurement to ensure the correct balance between rotor and stator. Any imbalance leads to excessive loads and reduced life. In these applications the materials used are oſten not suitable for eddy-current sensors, so Micro-Epsilon developed the CST6110 capacitance-based system that can measure a wider range of materials. Whether it is electrical conductors (metals) or insulators (plastics, ceramics), they are counted from the first detection, with no run-up necessary and without signal quality impairment. Capacitive sensors can also operate in both very high temperatures and the electromagnetic fields present in any motor.
Valve lift measurements Eddy-current sensors from Micro- Epsilon are also proving themselves in testing the latest fully-variable valve control systems for passenger vehicles. These systems control individual valves independent of the camshaft, with an electro-hydraulic control system providing fully-variable valve control. This means the stroke and opening/ closing times of the inlet valve are readily controllable, reducing fuel consumption and CO2
emissions, increasing engine
performance and torque. During the end-of-line inspection of
these systems, a test bench simulates the conditions inside the engine, where eddy-current sensors from Micro-Epsilon measure the exact valve liſt.
Temperature monitoring of tyres
Temperature monitoring of tyres From Formula Student to Formula 1, both single-point IR temperature sensors and thermal cameras from the thermoMETER and thermoIMAGER range are being used to monitor and understand tyre performance. Te thermoIMAGER series of compact thermal imaging cameras has been used extensively for several years, allowing engineers to record and monitor IR video in real time, useful in determining effects of the car setup and its influence on tyre temperature and operating conditions.
www.electronicsworld.co.uk October 2022 31
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