Hello
I have a robot with 2 distance sensors 4064 side by side with an angle of 40 degrees between them. Unable to work together due to interference. In your opinion can I operate a 4064 at the center and two presence detectors IR 4069 without interference between the three sensors?
Hello.
I generally expect a 40° offset to be enough angular separation to prevent interference; can you elaborate on how you are trying to use them and what behavior you are seeing? Also, could you post some pictures of your setup that show the sensor placements?
Brandon
Both sensors are oriented 20 degrees outward. When there is no obstacle, they make a false detection from time to time, which does not happen if I plug in a single sensor. These false detections are very embarrassing for my robot. I am attaching a photo of the installation.
Thank you for the additional information. It is hard to tell, but it looks like it might be possible that the chassis is interfering (or be right at the edge of the sensor’s detection). If it is practical for you, you might try testing the geometry separately of the chassis to see if you are still getting the odd reading every now and then.
Otherwise, you might be able to do some software processing (e.g. averaging several readings or only acting if the distance changes for multiple consecutive readings) to minimize the effect of the bad readings.
Brandon
Thank you very much, I will try your advice.
I have another concern, the 4064 , which has a theoretical range of 50 cm,only detects matte black objects at a distance of 120 mm. Do you think that this detection distance will be better with the sensor 4071 which has a theoretical range of 130 cm?
In general, the detection range depends heavily on the size and IR reflectivity of the object. For reference, as mentioned on the product page for the #4064 sensor, in our tests it was able to detect a white sheet of paper out to around 50 cm away, and a hand out to around 30 cm away. Unfortunately, a matte black surface is probably one of the worst cases. You will probably see some improvement by using a sensor with a larger range like the #4071 that you mentioned, but ultimately you would probably need to just test it in your application.
Brandon
