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CASE STUDIES
Force sensors improve the performance of ski jumping

The ski jumper slides down from the starting block, crouches down, and picks up speed: from 0 to 90 km/h in 2 to 3 seconds. He adjusted his weight to the radius of the slope and looked straight ahead. Then, with all his might, he pushed off the end of the platform. The torque generated by the jump puts the jumper into the correct flight position. His weight moved forward over the skis, his legs completely straight.

On average, jumpers make only one perfect launch out of every 100 jumps. The range is determined by approach, launch energy and torque. Every little move by a jumper can make the difference between winning and losing. A tight grid of force sensors is installed on the platform to continuously measure and analyze which forces are acting at the end of the platform throughout the jump.

The ELAF series of force sensors is a high performance sensor at low cost, with exceptional flexibility and superior performance, with excellent range and zero point stability. Due to the need to work under very low tension, the strain gauge used should have a strain sensitivity factor greater than 100, a basically unlimited cycle life, a high resolution and extremely high overload capacity (without stopping), and can provide a scaled output of 0.5 to 4.5 V or a bridge output of 20mV/V. ELAF sensors are suitable for test and measurement applications and can record every detail of each athlete's jump.



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