Wireless Brakes -- The Future...? - xBhp.com : The Global Indian Biking Community

j4zb4 · 10-18-2011, 01:52 AM

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Reaching 99.999999999997 percent safety: Saarland computer scientists present their concept for a wireless bicycle brake
13 October 2011 University Saarland

Computer scientists at Saarland University developed a wireless bicycle brake and demonstrated its efficiency on a so-called cruiser bike. Furthermore, they confirmed the brake system's reliability through mathematical calculations that are also used in control systems for aircraft or chemical factories.

The cruiser bike is more similar to an Easy Rider motorcycle without an engine block than it is to a traditional bike. However, looking at the straight, elongated stem, it is readily apparent what makes the newly developed system so special. The bicycle has neither a protruding brake lever to control the front brake, nor a brake cable snaking down the frame.

But the wireless bicycle brake represents much more than just an academic gadget to the scientists. Professor Holger Hermanns, who holds the chair of Dependable Systems and Software, and who developed the wireless bicycle brake together with his group, explains: "Wireless networks are never a fail-safe method. That's a fact that's based on a technological background." Nonetheless, the trend is to set up wireless systems that, like a simple bicycle brake, have to function all the time.

"In the field of the future European Train Service, for example, concrete plans already exist," Hermanns reports. Furthermore, he says that train and airplane experiments are far too sophisticated, and could even endanger the life of human beings in case of malfunction. Therefore, the Saarland computer scientist's mathematical methods should now verify the correct function and interaction of the components automatically. "The wireless bicycle brake gives us the necessary playground to optimize these methods for operation in much more complex systems," Hermanns adds. Therefore, his research group examines the brake prototype with algorithms that normally are used in control systems for aircraft or chemical factories. As a result, they found out that the brake works with 99.999999999997 percent reliability. "This implies that out of a trillion braking attempts, we have three failures," Hermanns explains and concludes: "That is not perfect, but acceptable."

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. The computer scientists at Saarland University found that increasing the number of senders does not result in increased reliability. "If it is not configured correctly, it is possible that three out of five braking attempts fail," Hermanns says.

Its current configuration enables the cruiser bike to brake within 250 milliseconds. This means that at a speed of 30 kilometers per hour, the cyclist has to react two meters before reaching the dangerous situation. But the Saarland University computer scientists are not satisfied with this functionality. "It is not difficult to integrate an anti-lock braking system and traction control. That takes only a few adjustments," Hermanns explains. After first talks with bicycle brake manufacturers, Hermanns is looking for engineers who will realize the concept of a wireless bicycle brake.
Researching the wireless bicycle brake was funded within the special research field

"Automatic Verification and Analysis of Complex Systems (AVACS)" by the German Research Foundation. Its results are documented in the scientific paper "A Verified Wireless Safety Critical Hard Real-Time Design," published by the Institute of Electrical and Electronics Engineers (IEEE).

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If this technology finds its way into mainstream automotive I think it would be a game changer...

Noor · 10-18-2011, 04:47 PM

News approved

Samarth 619 · 10-18-2011, 05:10 PM

Wow, very cool. As a standalone technology, it is very good.

Although, I wonder if the future is electric, what would be my (the rider's) role? One day GPS based systems will take you everywhere you want with 99.XX% of safety, and all aspects including braking, accelerating, shifting being electronic, would the rider's role only be to press an emergency stop button, if at all?

Although yes, this wireless system is overall good, but what are the benefits over a conventional system? Our Disk brakes work just fine, with quick response, high braking potential and so.

So, I guess it should be for bicycles only?

RedFlash · 10-18-2011, 07:16 PM

It has begun brothers, We (The riders) are being eventually being phased out from our beloved Bikes

spagnet · 10-18-2011, 07:32 PM

My bluetooth headset has so much trouble maintaining link with my handset even at 30 cm distance at Line of Sight on the road due to interference from millions of powerful radio sources : Television Stations, FM Stations, CDMA Towers (850 MHz), GSM Towers (900 /1800 / 2100 MHz), Bluetooth Connections of other users, WiFi Networks (2.4 GHz), WiMax Networks (2.3 / 2.5 GHz), High End Cordless Phones (45 / 900 / 2400 MHz), DECT Phones (1700 / 1900 MHz), CB Radio, Police Radio, Ham Radio; the list goes on and on! I doubt the electromagnetic pollution can come down any soon. Now why would I ever rely on my brakes to function normally using wireless radio technology? Even on my bicycle?

jain.joymax · 10-18-2011, 08:13 PM

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Originally Posted by j4zb4

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If this technology finds its way into mainstream automotive I think it would be a game changer...

quite fiesable for bicycle......don't want it for Motor Bikes....

HH_HUNK · 10-19-2011, 11:49 PM

Quote:

Originally Posted by spagnet

My bluetooth headset has so much trouble maintaining link with my handset even at 30 cm distance at Line of Sight on the road due to interference from millions of powerful radio sources : Television Stations, FM Stations, CDMA Towers (850 MHz), GSM Towers (900 /1800 / 2100 MHz), Bluetooth Connections of other users, WiFi Networks (2.4 GHz), WiMax Networks (2.3 / 2.5 GHz), High End Cordless Phones (45 / 900 / 2400 MHz), DECT Phones (1700 / 1900 MHz), CB Radio, Police Radio, Ham Radio; the list goes on and on! I doubt the electromagnetic pollution can come down any soon. Now why would I ever rely on my brakes to function normally using wireless radio technology? Even on my bicycle?

Are you an EXTC Engineer?

Okies jokes apart, as per me the power of our BT Headphones is mere 10mW so its bound to be affected dude. These wireless systems will atleast radiate 60-80mW to provide a strong link

Quite feasible for mo-bikes as well

The only thing is that there should be provision for wired brakes too incase the battery goes dead then? toast :P

j4zb4 · 10-20-2011, 12:00 AM

Quote:

Originally Posted by HH_HUNK

The only thing is that there should be provision for wired brakes too incase the battery goes dead then? toast :P

That would quite defeat the purpose, won't it...? How about loud beeping sounds when the batteries reach 10%...?

HH_HUNK · 10-20-2011, 02:14 PM

Quote:

Originally Posted by j4zb4

That would quite defeat the purpose, won't it...? How about loud beeping sounds when the batteries reach 10%...?

Defeat the purpose? How?
Say the battery is gonna die in 30 mins and by any means you cant reach a place where you can charge the battery in 30 mins then?
The wired brakes will be helpful. Its like having cruise control in a bike isnt it? You will use it as per your convenience right? All CC enabled cars dont always use CC do they?

Its upto the driver like we have a switch on some bikes for turning off the ABS/TCS right? Similar to that manner

j4zb4 · 10-20-2011, 02:33 PM

Quote:

Originally Posted by HH_HUNK

Defeat the purpose? How?
Say the battery is gonna die in 30 mins and by any means you cant reach a place where you can charge the battery in 30 mins then?
The wired brakes will be helpful. Its like having cruise control in a bike isnt it? You will use it as per your convenience right? All CC enabled cars dont always use CC do they?

Its upto the driver like we have a switch on some bikes for turning off the ABS/TCS right? Similar to that manner

This is a bit different from cruise control... It would be more like using a bluetooth headset which is also wired... so incase the battery dies you can continue using it wired...

Rather have a battery meter which shows the exact percentage ala your cellphone... So when if you are going on a long ride and the batteries show 30% just carry extra batteries in your backpack...

10-18-2011, 04:47 PM	#2 (permalink)
Noor Administrator Join Date: Mar 2003 Location: Mumbai, Maharashtra, India. Posts: 2,336	News approved __________________ Happiness is finding you have another Gear left.... Join xBhp On

10-18-2011, 07:16 PM	#4 (permalink)
RedFlash Senior Member Join Date: Jun 2010 Location: Pune Posts: 252	It has begun brothers, We (The riders) are being eventually being phased out from our beloved Bikes __________________ Never let your mouth be Broadband when your brain's on Dial Up. Never argue with an idiot. He will drag you down to his level and then beat you with experience. Facebook : www.facebook.com/akash.dingare xBhp Pune Member Details: https://docs.google.com/spreadsheet/...4ZUlPQlE#gid=0

10-18-2011, 07:32 PM	#5 (permalink)
spagnet Junior Member Join Date: Sep 2010 Location: Old Sangvi, Pune, Maharashtra, India Posts: 23	Wireless braking - Realistic? My bluetooth headset has so much trouble maintaining link with my handset even at 30 cm distance at Line of Sight on the road due to interference from millions of powerful radio sources : Television Stations, FM Stations, CDMA Towers (850 MHz), GSM Towers (900 /1800 / 2100 MHz), Bluetooth Connections of other users, WiFi Networks (2.4 GHz), WiMax Networks (2.3 / 2.5 GHz), High End Cordless Phones (45 / 900 / 2400 MHz), DECT Phones (1700 / 1900 MHz), CB Radio, Police Radio, Ham Radio; the list goes on and on! I doubt the electromagnetic pollution can come down any soon. Now why would I ever rely on my brakes to function normally using wireless radio technology? Even on my bicycle? __________________ The road ahead becomes smooth when the co-riders become friends; Be nice, be loved!

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10-18-2011, 05:10 PM	#3 (permalink)
Samarth 619 Moderator Join Date: Sep 2008 Location: Rajasthan Posts: 2,801	Wow, very cool. As a standalone technology, it is very good. Although, I wonder if the future is electric, what would be my (the rider's) role? One day GPS based systems will take you everywhere you want with 99.XX% of safety, and all aspects including braking, accelerating, shifting being electronic, would the rider's role only be to press an emergency stop button, if at all? Although yes, this wireless system is overall good, but what are the benefits over a conventional system? Our Disk brakes work just fine, with quick response, high braking potential and so. So, I guess it should be for bicycles only?

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