Sentinel

Holishit - NVMS accelerometer cable mounts. I have seen a million of those things dangling from loose cables.

Ryanthegreat1

2016 S1000RR has a lean angle displayed on the dash.

Squidly

Motoru has made it to show the max lean and g force for an adjustable amount of time so you can look once you're vertical again. I don't think it's a safety issue, I'll look at my tach or speedometer mid-corner.

WMRRA112

I want one

skjeflo

Love the concept! Almost totally worthless as a tool to improve riding, yet one most riders seem to love. The perfect toy!

Just a question based on the results (or lack thereof) of the lean sensor phone apps. How does this sensor overcome inertia acting upon the sensor to come up with the proper reading for angle and g-force?

motoru

If you take a look at the paper wrote (linked in the original post) it explains this at the end.

What made it even trickier than the non-inertial reference frame is the fact that the rider can move his/her body around, thus you can take the same turn at the same speed with different lean angles, just by how you position your body. Obviously the sensor cannot know this and it turns out an accelerometer isn't sufficient for determining the lean angle because there are 2 solutions to the system of equations (depending on sign of lateral acceleration). Fortunately, the MPU6050 also had a 3-axis gyro (a MEMS tuning fork that measures angular rate) which I could use to determine the last necessary piece of information. This is also explained in the paper.

My method can easily be programmed into a smartphone, however you still need to do that calibration step that I have showed in video, and the phone must still be rigidly mounted on the bike frame, this is because that matrix that it computes is a unique linear transformation between 2 vector bases.

Most smartphones now have magnetometers, which gives you a vector that points in the direction of the Earth's magnetic field. I could use this information to make the sensor auto-calibrate so you wouldn't even need to do that step, you'd just throw your phone on a mount and it works.

I started learning Java and will get into Android development soon, so I'll see what I can do. My next project is making a blind spot sensor, like with the warning LEDs in the mirror that some newer cars come with.

Once I get familiar with Android development I want to make an anti-theft app, so we'll see what I have time to do in the future.

Lastly, thanks to everyone that participated, I didn't think people would care about this sensor but I was proven wrong.

Michael of Burien

I disagree. Although it may not be totally accurate. It can give you information on what the bike is doing(max lean recorded for an adjustable period of time). Additionally you get fore and aft G-force readings.

I had a friend of mine(programmer and math/radio/micro controller developer) look at the paper and device and he said the only thing keeping it from being remarkably accurate is noise(electronic and vibration). The math behind the programming is valid and should work just fine.

I picked up the prototype and got to speak with the creator today. I like what he has planned and we discussed a few ideas of features I thought might be beneficial.

I really like the potential of blind spot monitoring. It's not new. But I don't think it's been done on a motorcycle. And at the price point this technology lends itself to. A whole "feedback" electronics package is not only achievable. But quite practical and even inexpensive. Think about adding a GPS sensor and data recording and you add a lot more potential feedback.

SilvieFox

ok your tech savy i got a project for you, i want a second horn i can hook up that can simply play an MP3 (or other) sound clip , so i can have a fox bark or yarvis parody or what ever

Michael of Burien

Should be quite easy. Only issue would be a speaker(PA type like on police vehicles) and amp are large and heavy.

SilvieFox

doesnt have to be super loud my bike is silent, but ya i was thinking a pair of small trumpet tweeters (like kind used on cheap car/bike alarms) up under my front fairings

Michael of Burien

Then all you need is an amp and MP3 playing Arduino set to play on horn impulse.
https://www.adafruit.com/products/17...FYpufgodMcQB_g

SilvieFox

ya i was just looking to see if he sould make something like that but cheaper (im a tight wad )

Michael of Burien

Learn C and do it yourself. Easy peasy.

motoru

Those tweeters are made to play a single frequency (plus all the higher harmonics, of course). It's a diaphragm whose natural frequency is the one you want to hear, and its forced by an electromagnet. That's why they're so cheap.

This means that you cannot play music on it. Speakers are designed to have a much higher natural frequency, that way it can be vibrated at all audible frequencies (almost) equally. The downside to this is that they're not loud because you don't get the benefit of resonance. That's why a small horn is much louder than a speaker of the same size. Here's the relevant math techniques used in this type of analysis:
https://en.wikipedia.org/wiki/Bode_plot

It's one of those things where you can't have it all, you have to pick one or the other.

DGA

Impressive and very well done. If you don't me asking...what do you do for bike and gas money motoru?