Friday, October 14, 2011

wireless bicycle brake

http://www.sciencedaily.com/releases/2011/10/111013085105.htm

To brake with the wireless brake, a cyclist has just to clench the rubber grip on the right handle. The more tightly the grip is clenched, the harder the disk brake on the front wheel works. It seems as if a ghost hand is in play, but a combination of several electronic components enables the braking. Integrated in the rubber grip is a pressure sensor, which activates a sender if a specified pressure threshold is crossed. The sender is integrated in a blue plastic box which is the size of a cigarette packet and is attached to the handlebar. Its radio signals are sent to a receiver attached at the end of the bicycle's fork. The receiver forwards the signal to an actuator, transforming the radio signal into the mechanical power by which the disk brake is activated. To enhance reliability, there are additional senders attached to the bicycle. These repeatedly send the same signal. In this way, the scientists hope to ensure that the signal arrives at the receiver in time, even if the connection causes a delay or fails.

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D: fancy. Clean looking.
But just running the cables inside the frame can accomplish that.

Update- getting bro-in-law civ engie to run stress calcs on my what-if bike frame.
See 'my entry into bicycle design contest'.
2 parallel side-by-side tubes need to match the strength of a SWB's single monolithic boom.
Note that mine is not perforated by the central tubes from steering and seat post.
My latest tweak makes keeping water out easier.
The chain return line is line with the bottom bracket now.

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