RoamingWithPING(Advanced)

thomas_pittin

Hello All,

I have a little problem with the program "RoamingWithPING".
in this code I have 3 sensors: 1 is the PING and the other 2 are the IR sensor

my problem is that when i launch the program, i see the value(0 or 1) on the DEBUG window of the IR sensor, the values are not stable


for example, they switch 0 to 1 (and 1 to 0) continuously even if there is not object in front of them.

could you please help me?

Genetix

Something is triggering them or they are very sensitive. Run InterferenceSniffer,bs2 (Robotics with the Boe-Bot) to see if anything is throwing out IR,
You can also increase the values of the resistors for your IR LEDs and that will lower the sensitivity.

erco

And you are using the black, 3-pin 39 khz IR receiver modules, not a simple phototransistor, right? Those receiver modules are active low, so they should normally return a 1 output unless they are detecting a signal.

Is there something in your environment that might be giving off harsh, weird pulsing light that interferes with your IR sensors? IR beacons (Roomba virtual walls) would be a showstopper, maybe even some types of flourescent/halogen/incandescent lights, or sunlight.

Try the bot in a different (preferably darkened) room and see if the results change at all.

Also, try removing the onboard IR LEDs that are transmitting a signal. Then point a TV IR remote at the sensors and check their output.

In bocca al lupo, il mio amico!

thomas_pittin

Thanks everybody...wednesday I'll try your suggestions

ValeT

Also, make sure the IR sensors aren't looking directly at a dark colored object. This could throw them off because the light coming out of the IR could reflect sometimes but not others, causing random 1s and 0s. When I was at USASEF 2014, the IR ActivityBots would sometimes not recognize objects that are dark colored.