Petrol in the blood,
with a sense of safety

Sensors for budding mechanics

Real car guys start early, and that has to include a look under the bonnet. At the Spieleland theme park in Ravensburg, even the youngest member of the family can drive around in a sleek miniature Mercedes SLK. In the new Bosch Car Service World visitors can also change the wheels of the large originals – as a game to see who is fastest. In both cases a whole series of inductive and optical sensors ensures that everything is fair and safe.

The love of fast engines and finely shaped car bodies must be in the genes. Speedy roadsters will bring a sparkle to the eyes of even the youngest enthusiasts. Even a visit to the workshop to watch repairs being done can be a fascinating experience for children. The 600 sq.m. Bosch Car Service World is one of the most popular family attractions in the Ravensburger Spieleland. The popular "Play Land" theme park in Ravensburg, Germany is dedicated to entertainment, education and knowledge. The new wheel changing game for the whole family is correspondingly realistic. Speed is not all that counts – the quality of the work and neatness in the workstation are also considered. So the stopwatch keeps running until the sensors report that everything is back in place.


A miniature workshop world

Peter Szabolcsfi set up the system with his company PROKAR and created the technical requirements to ensure that the rules of the game are followed. The wheel bolts must be correctly inserted and tightened, the tyre rack properly fitted and each tool put in the right place. All of this must be in place to win the game. So it is important to follow the regulations and safety rules. "to make the game as realistic as possible we work for example with tyre models that are lighter than the originals but just as large as them, and also with compressed air screwdrivers appropriate for children" says Szabolcsfi.


PROKAR decided to use autosen devices for all models. An important criterion: the online sales model. "Since I'm self-employed I often work outside of regular business hours, and because of that I am a regular customer of online shops without any rigid opening hours" says Szabolcsfi. Another point: the safety of German premium products.

"When the safety of children is at stake, reliability and durability come first in the requirements specification. Cheap products from the far east are excluded without consideration."
Peter Szabolcsfi
The position of the wheel bolts is monitored by four inductive sensors for each rim. They have rugged metal threads and sense the wheel bolts. The compartment in which the compressed air screwdriver is supposed to be safely stowed is also inductively monitored. The shelf compartments for the tyres are equipped with optical sensors.

Autonomous driving

Ravensburger Spieleland is a good example of the universal application range of our sensors, and also a blueprint for the mobility issues of the future. Autonomous driving, for example, is inconceivable without a corresponding sensor system. Of course it is much more complex in road traffic and the control unit is much more intelligent, but the principle is the same.


A good thirty years ago, master automobile technician Peter Szabolcsfi – with petrol fairly coursing through his veins – raced in the most spectacular mountain races, from valley to peak and from title to title, several times becoming Hungary's national mountain racing champion. His race cars – compact BMW models and the legendary NSU Prinz – were maintained and repaired by his own hands whenever time permitted. An important success factor for race drivers. Knowing his vehicle inside and out is the only way a race driver can also know how it will respond in a race. He turned to miniature cars just before the turn of the millennium. Amongst other vehicles, Porsche Carreras for the automobile city of Wolfburg and various VW and Mercedes models were manufactured under licence. Most of them run laps on miniature tracks and race circuits, for example in Ravensburger Spieleland, close to Workshop World. To prevent accidents due to collisions on the course, photoelectric sensors in the bumpers continuously sense the distance to the car in front. If it is not far enough the vehicle brakes automatically. A technology similar to automatic cruise control in passenger cars.

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