AUTOMOTIVE
In spring travel measurements, MPM draw-wire displacement sensors from Micro-Epsilon are mounted in parallel to the shock absorber to record the data under different road conditions. Based on the displacement signal obtained, vibration velocity and vibration acceleration can be calculated. In crash tests, multiple MPM draw- wire sensors measure the effects on the vehicle body and the passengers caused by the impact. Their high wire acceleration enables the sensors to measure the movement of the object. In order to optimise the braking behaviour and the pedal travel involved, F50 draw-wire sensors from Micro-Epsilon offer a rotatable potentiometer, which enables the user to freely select the measuring range within the entire extraction length (150mm). The integrated deflection pulley allows the sensor to be flexibly integrated in the footwell or the engine compartment.
BEHAVIOUR OF COMBUSTION ENGINES
Non-contact eddy current displacement sensors from Micro-Epsilon are considered as proven measuring instruments in combustion engine test benches. In ‘towing’ mode as well as in the ‘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 eddyNCDT eddy current sensors from Micro-Epsilon.
SPEED OF ELECTRIC MOTORS The development of electric motors has seen a requirement for speed measurement to ensure the correct balance of the rotor and stator. Any imbalance would lead to excessive loads and reduced life. In these applications the materials used are often not suitable for Eddy Current sensors so Micro-Epsilon developed the CST6110 capacitive based system which is able to measure on 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 any impairment of the signal quality. Capacitive sensors can also operate in both very high temperatures and the electromagnetic fields that are present in any motor.
VALVE LIFT MEASUREMENTS Eddy current sensors from Micro- Epsilon are also proving themselves in test
benches for the latest fully variable valve control systems for passenger vehicles. These systems control individual valves independently of the camshaft. An electro-hydraulic control system provides fully variable valve control. This means the stroke and opening/closing times of the inlet valve are freely controllable. This reduces fuel
consumption and CO2 emissions with a simultaneous increase in engine performance and torque. During the end-of-line inspection of these systems, a test bench simulates the conditions inside the engine. Here, eddy current sensors from Micro-Epsilon measure the exact valve lift.
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. The thermoIMAGER series of compact thermal imaging cameras has been used extensively for several years, allowing engineers to record and monitor in real-time IR Video which is used in determining effects of the car setup and its influence on the tyre temperature and operating condition.
Micro-Epsilon
www.micro-epsilon.co.uk
UKManufacturing Autumn 2022
37
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