| Kai Klaas 03/11/12 12:59 Read: 212 times Germany |
#186583 - Costs... Responding to: Joseph Hebert's previous message |
Joseph said:
Would it really be that expensive to accomplish? I think, yes. You must have a very robust construction which must be able to withstand heavy kicks. Also certain crahses must be taken by the contruction when the pedal "touches" the asphalt in curves or during harsh handling. So you need a frictionless guide for the pedal movement which is free of play and can accept shear forces. On the other hand you need an elastic holding fixture for the strain gauge which can pick up the pedal forces and transform it into stretch. The elasticity must be very high even linear up to the highest forces without any fatigue for months or even years. At the same time the rider must not feel this elasticity but the kick must be hard and direct. I think to find a satisfying solution will be a hard and long way. This must be a very accurate construction and the used materials must be high-quality as well. Yes, I think this will become very expensive. Kai Klaas |
| Topic | Author | Date |
| bikey design challenge | Jez Smith | 03/09/12 12:14 |
| Only 400W? | Per Westermark | 03/09/12 12:23 |
| Its a bit different on the road | Jez Smith | 03/09/12 12:34 |
| Brilliant idea in the bath | Jez Smith | 03/09/12 13:35 |
| Might work | Per Westermark | 03/09/12 13:51 |
| well... | Jez Smith | 03/09/12 14:33 |
| So you are yourself saying 400W is a bit low max scale | Per Westermark | 03/09/12 14:43 |
| O.K then 500 watts | Jez Smith | 03/10/12 00:56 |
| Battery | Per Westermark | 03/10/12 05:11 |
| Fun with strain gauges | Oliver Sedlacek | 03/12/12 05:57 |
| You sure? | Per Westermark | 03/09/12 13:48 |
| nice ride | Andy Peters | 03/09/12 14:31 |
| fanks | Jez Smith | 03/10/12 00:54 |
| Sigma Rox 9.1... | Kai Klaas | 03/10/12 09:59 |
| Sigma fake | Per Westermark | 03/10/12 11:07 |
| What do you expect for that price? | Kai Klaas | 03/10/12 12:09 |
| Head or tail wind? Or riding in a group or alone? | Per Westermark | 03/10/12 12:38 |
| Way overcomplicating this | Joseph Hebert | 03/10/12 14:02 |
| Sensors | Steve M. Taylor | 03/10/12 14:22 |
| how indeed | Andy Peters | 03/11/12 12:37 |
| Wrong - you are totally missing the drag factor | Per Westermark | 03/10/12 14:22 |
| Not at all. | Joseph Hebert | 03/10/12 16:03 |
| Real manufacturers haven't found your idea simple... | Per Westermark | 03/10/12 17:09 |
| Point made | Joseph Hebert | 03/10/12 18:46 |
| Some of your points are just wrong | Justin Fontes | 03/10/12 19:04 |
| Sounds like you expect an infinite acceleration | Per Westermark | 03/11/12 06:49 |
| Repeat post Ignore | Justin Fontes | 03/11/12 11:39 |
| I try for a constant power | Justin Fontes | 03/11/12 11:52 |
| Crank rpm - not back wheel rpm | Per Westermark | 03/12/12 00:31 |
| I got the two confused | Justin Fontes | 03/12/12 10:37 |
| Bandwidth + return channel | Per Westermark | 03/12/12 12:07 |
| Oh dear, so many variable constants | Oliver Sedlacek | 03/12/12 06:48 |
| rocket science | Maarten Brock | 03/11/12 03:58 |
| So don't ignore them | Joseph Hebert | 03/11/12 07:39 |
| Of course, it is... | Kai Klaas | 03/11/12 08:18 |
| wireless | Joseph Hebert | 03/11/12 08:36 |
| Costs... | Kai Klaas | 03/11/12 12:59 |
| cost | Joseph Hebert | 03/11/12 13:39 |
| Another problem | Joseph Hebert | 03/12/12 21:14 |
| This was addressed earlier | Justin Fontes | 03/12/12 22:02 |
| Multiple strain gauges | Per Westermark | 03/13/12 00:53 |
| Competitive bicycling | Justin Fontes | 03/13/12 10:24 |
| Pulse | Per Westermark | 03/13/12 10:55 |
| If I had the power meter | Justin Fontes | 03/13/12 11:14 |
| Normalizing with heart beats cancels some errors | Per Westermark | 03/13/12 12:39 |
| Just to get some data to look at | Jez Smith | 03/15/12 03:37 |
| Jez ? | Steve M. Taylor | 04/14/12 04:35 |
| Oh Noes!!!!!! | Jez Smith | 04/14/12 10:58 |
| The plan is | Jez Smith | 04/15/12 01:55 |
| Brum doesn't HAVE mountains | Steve M. Taylor | 04/15/12 14:51 |
| Ah yes but no but | Jez Smith | 04/15/12 23:23 |
| Actualy... | Jez Smith | 04/15/12 23:35 |
| If I had a power meter... | Oliver Sedlacek | 04/16/12 04:20 |
| Ive been testing things | Jez Smith | 04/16/12 04:41 |
| Well, no | Steve M. Taylor | 04/16/12 07:41 |
| all very well thank you Steve | Jez Smith | 04/16/12 08:45 |
| Getting nasty | Steve M. Taylor | 04/17/12 10:54 |
nasty ? | Jez Smith | 04/20/12 12:09 |
| More time than money if access to machinery | Per Westermark | 03/12/12 00:57 |
| Strain gauge elastic fixtures | Oliver Sedlacek | 03/12/12 06:55 |
| Sure | Per Westermark | 03/11/12 09:42 |