164 reputation
7
bio website none
location Poland
age 29
visits member for 2 years, 2 months
seen Jul 3 at 9:31

Just your average computer junkie, fiddling with C# and such. :)


Jan
20
awarded  Popular Question
Dec
3
comment Detecting “lack of movement” on GPS device
Was that a comment or a question? :P Well, basically, aside from my friend finding some parameters for the movement sensor, we noticed there are very few readings of a vehicle left under a roof for the night where BOTH the movement sensor detected movement and the GPS reading had a non-0 speed. It's not perfect, but it was rare enough that we decided to go with it. Aside from that, well... like you said, every case is different.
Nov
9
comment Detecting “lack of movement” on GPS device
It's entirely possible my colleague has set up the number of visible satellites by mistake, rather than the number used for a fix (all I saw was an Excel sheet with data with column titles being filled out manually). :P In any case, as I wrote, the tuned motion sensor was our way out of this problem.
Nov
9
comment Detecting “lack of movement” on GPS device
The main problem is with vehicles which are stored in a shed of some sort for the night. I don't think it repeats the last know position, because vehicles WILL vanish completely if they enter / are stored in concrete garages (or anything more solid). The drop of satellites is an indicator, but it seems to be subtle and it turned out to be far easier to just tweak and use the motion sensor data.
Oct
12
awarded  Nice Question
Oct
11
comment Detecting “lack of movement” on GPS device
Geofence might be useful... but not for this. If we were to outline the garages ourselves we'd go mad, and our clients probably won't want to do that either. We cannot rely on maps either, as these are mostly farming vehicles and as such, they work and are being kept outside of cities, so the maps aren't anywhere as precise.
Oct
11
comment Detecting “lack of movement” on GPS device
I do have to comment about the idea to collect voltages. It's excellent! We're having a fair bit of trouble with certain vehicles, and we're unsure why. We're currently suspecting it might be due to poor skills on part of the tech-guy who mounted the tracking devices which results in voltage problems, albeit it can also be sabotage (yes, sabotage; we're monitoring fuel levels and the drivers don't like that). If we can record the voltage on the tracking devices, that should help immensely. :) Huge thumbs up! (I'd give more than one, but sadly, I cannot...)
Oct
11
awarded  Scholar
Oct
11
awarded  Supporter
Oct
11
accepted Detecting “lack of movement” on GPS device
Oct
9
answered Detecting “lack of movement” on GPS device
Oct
9
comment Detecting “lack of movement” on GPS device
Since the vehicles are problematic when not moving whilst on parking lots or garages, this isn't at all useful. :(
Oct
9
comment Detecting “lack of movement” on GPS device
The GPS device returns a number of data with every sent packet, including position and current speed. We already have a system in place where, if the speed is lower than a certain value, we assume the vehicle is not moving, however thee are cases where a vehicle will send data with speeds over that threshold, despite being still (note: those speeds aren't THAT great that we could add an upper limit). I'm not sure if calculating the speed based just on positions (rather than the GPS reading) is a good idea.
Oct
8
awarded  Editor
Oct
8
comment Detecting “lack of movement” on GPS device
I've edited my question to give more information. In short: the accelerometer is acting crazy, we have access to satellite count or quality info, but we're unsure how to use them, and yes, this is NOT a real-time detection issue.
Oct
8
revised Detecting “lack of movement” on GPS device
Added some answers to comments
Oct
8
awarded  Student
Oct
8
asked Detecting “lack of movement” on GPS device
Oct
8
awarded  Autobiographer