BenReaper Posted May 17, 2015 Posted May 17, 2015 I have had dealings with these currents in the past.The seat on my first bike presumably had steel rails and whenever I would pass under power lines like these I would experience the current shorting from my seat rails to my thighs.
BenReaper Posted May 17, 2015 Posted May 17, 2015 Also had to stop under these lines with my work bakkie as something I was transporting had started coming loose on the roofrack.It was raining and I couldnt touch the steel roofrack as it was being electrified by the current from the powerlines,had to drive further down the road to tighten my load.
Capricorn Posted May 17, 2015 Posted May 17, 2015 Play with a light sabre? Why not you old spoilsport? I was already planning a trip to Koeberg. you can if you really want to, but it comes with a fair probability of a free trip to a plastic surgeon and/or mortician. Dont google it. It aint pretty.
Capricorn Posted May 17, 2015 Posted May 17, 2015 I have had dealings with these currents in the past.The seat on my first bike presumably had steel rails and whenever I would pass under power lines like these I would experience the current shorting from my seat rails to my thighs. that's hectic!
Speeltyd Posted May 17, 2015 Posted May 17, 2015 My Garmin Edge 800 with Ant+ accessories has recently been momentarily indicating Auto Pause followed straight away by Auto Resume, for no apparent reason, when my bike has been in motion. Today it did it repetitively, to my annoyance but I then realised that it coincided with riding on a steel-reinforced concrete road. As soon as I went onto a "normal" gravel and bitumen road the problem disappeared. Could the steel in the road be interfering with the radio signal from the Ant+ speed device?My Garmin 500 does this all the time when I ride on the Wattbikes in the gym - over a 60 min exercise I lose over a minute. Any explanations for that?
Offord Posted May 17, 2015 Author Posted May 17, 2015 Let me get this back on topic by saying that there are very few powerlines next to the concrete road on which I was riding. Only street lighting with underground cables. I'm still convinced that there is an induced interference arising from the steel cage beneath the road.
Capricorn Posted May 17, 2015 Posted May 17, 2015 Let me get this back on topic by saying that there are very few powerlines next to the concrete road on which I was riding. Only street lighting with underground cables. I'm still convinced that there is an induced interference arising from the steel cage beneath the road. and again, because this is fact: the rebar cage alone will not cause interference. It's as electromagnetically inert as EM inert gets, UNLESS acted upon by an external influence such as overhead or buried powerlines, or some other source of electromagnetic energy. This source may couple electromagnetically with the rebar at distances you would not consider as 'close'. The ground is extremely capable of dissipating electromagnetic energy, which is why you ground electrical supplies to "earth". The earth can therefore couple source and rebar cage over longer distances. But its rather more likely the source is very nearby. The only time the rebar would influence the signal directly, is if it was physically between the sensors and the head unit. It would then be in a physical position to absorb some of the electromagnetic energy emitted by the sensor. You will be familiar with this effect when observing reduced mobile phone signal quality in structures built of substantial amounts of reinforced concrete. But i doubt you'll want to lug some rebar around. surely
fanievb Posted May 17, 2015 Posted May 17, 2015 Let me get this back on topic by saying that there are very few powerlines next to the concrete road on which I was riding. Only street lighting with underground cables. I'm still convinced that there is an induced interference arising from the steel cage beneath the road.Where on Main Rd were you riding? The section from the robots to Riegers has power lines leading to the substation
Rocket-Boy Posted May 18, 2015 Posted May 18, 2015 We are patiently waitingBeen year 6 years and have never known the road without some form of roadworks.I moved back to Gonubie just over 6 years ago(grew up there)It was chaos from day 1 in the traffic. Been in Stirling for 5 months now and loving life.
Rocket-Boy Posted May 18, 2015 Posted May 18, 2015 The problem was noticed on the new Gonubie Main Road in East London. The road is still under construction. Even as a civil engineer, I was amazed at the amount of steel cage being laid before the concrete is poured.My suspicions about the concrete road being the cause of the interference were "reinforced" when, on riding the "Gonubie Loop" 10 times yesterday, the same Ant+ interference occurred on every lap when I rode over another 100m of concrete road.The only place there is the reinforced section on the loop itself is next to Black Rock on the beachfront and there are no power lines there.That was the test section that they used to test the CRP machinery. I never had any hassles with my tomtom when running over there but will check with some of the guys I know in Gonubie. 10 laps is a good ride, that loop is one of the things I miss most about Gonubie.
Rocket-Boy Posted May 18, 2015 Posted May 18, 2015 This section is now CRP, is that where you are talking about?
dracs Posted May 18, 2015 Posted May 18, 2015 My Garmin 500 does this all the time when I ride on the Wattbikes in the gym - over a 60 min exercise I lose over a minute. Any explanations for that? Sorry to the OP for the off topic post, do I understand your post correctly that you can pair your garmin with the Wattbike? Do you add it as separate power and speed sensors then or how do you do it?
Wez-O Posted May 18, 2015 Posted May 18, 2015 My Garmin Edge 800 with Ant+ accessories has recently been momentarily indicating Auto Pause followed straight away by Auto Resume, for no apparent reason, when my bike has been in motion. Today it did it repetitively, to my annoyance but I then realised that it coincided with riding on a steel-reinforced concrete road. As soon as I went onto a "normal" gravel and bitumen road the problem disappeared. Could the steel in the road be interfering with the radio signal from the Ant+ speed device?I've had a similar problem on my one bike recently (on all roads and indoor), I tried everything including changing batteries and the only fix was to remove/disable speed sensor on the back wheel.
Offord Posted May 18, 2015 Author Posted May 18, 2015 This section is now CRP, is that where you are talking about?Yes, that is the section
fanievb Posted May 18, 2015 Posted May 18, 2015 Yes, that is the sectionNot sure if this is the culprit then? AFAIK this is some or other sewerage pump and some telkom things
DJR Posted May 18, 2015 Posted May 18, 2015 Try riding it during load shedding and see if it works fine? Just wondering out loud.
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