Savvy student aims for Olympic shooting accuracy

French engineering student Raphaël Chevalier has developed a device that helps Olympic prone shooters improve their accuracy by up to 24%.
 
 
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ROYSTON, England - May 17, 2016 - PRLog -- Rifle shooting is a precise science where the combination of barrel and ammunition affects the bullet's accuracy. This is mainly due to the gun's 'kick', also known as recoil, as the bullet fires: transverse vibrations result from recoil forces in the rifle imparting on the back of the barrel. These vibrations cause a variation in shot accuracy.

Raphaël got the idea to develop a system and corresponding technique for analysing and predicting how rifles perform with certain ammunition. Once Raphaël had his methodology in place, he needed some help testing the system, gathering data and analysing the results, so contacted Brüel & Kjær.

"When I explained my research project to them, they responded enthusiastically," says Raphaël. "They sent Henri Gérenton, who is an application engineer, to meet with us at INSEP (France's National Institute of Sport and Physical Education) and do a half-day measurement session."

To capture the data they needed, Henri and Raphaël placed two accelerometers - one vertically and one horizontally - at the extremity of the gun barrel and then recorded time signals of the shots, in order to reconstruct the motion of the muzzle and the muzzle jump (the tendency of the front end of the firearm to rise up after firing).

The signals were recorded using Brüel & Kjær's LAN-XI data acquisition hardware and PULSE™ Time Data Recorder software. They made as many recordings as possible in order to increase their statistics and changed parameters such as the gun barrel, the ammunition, the gun itself in a systematic way, to achieve a more nuanced view of their results.

"Thanks to the measurements done by Brüel & Kjær, we have been able to determine the relative impact of some of the parameters on vibration and confirm the efficacy of different types of rifles and gear," explains Raphaël. "That means we were able to calibrate my system for optimising the barrel-to-ammunition match that will improve shooters' gear accuracy during training."

The full article is available to read on Brüel & Kjær's website: http://www.bksv.com/NewsEvents/Waves/Articles/2016/prone-to-excellence

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About Brüel & Kjær


Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration measurement systems.

We help customers measure and manage the quality of sound and vibration in their products and in the environment. Focus areas are aerospace, space, defence, automotive, ground transportation, airport environment, urban environment, telecom and audio.

Brüel & Kjær has an unparalleled portfolio of sound and vibration equipment and is a long-established designer and manufacturer of innovative instrumentation including sound level meters, microphones, accelerometers, conditioning amplifiers, calibrators, noise and vibration analysers, and PULSE software.

We also design and manufacture the LDS range of vibration test systems, as well as complete airport and environmental monitoring systems: WebTrak, ANOMS, NoiseOffice and Noise Sentinel.

Brüel & Kjær runs a variety of training courses - from basic introductions to noise and its effects to more specialised classes teaching customers how to get the most out of their equipment. Free online training courses, conducted by our expert engineers, run throughout the year too.

Brüel & Kjær is a subsidiary of UK-based Spectris plc, which has annual sales of £1.1bn and employs around 8,300 people worldwide across its four business segments.

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