MEMS Accelerometer and Gyroscope to Improve Car GPS Navigation System Performance
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When it comes to very weak GPS signal that you’ve got, the position accuracy derived from GPS receiver might be 
lower than required. You will need to use an external sensors such accelerometers, gyroscopes, odometers, and etc to have anavailability and reliability of weak GPS signal. The following article describe you with the using of 3D MEMS accelerometer and one MEMS gyroscope which is integrated in a GPS based car navigation system.
According to the article, the major goal of setting up this system is bridge brief up to 30 seconds GPS outages, 5 Hz continuous and smooth delivery output of position, velocity and heading, filter out bad GPS position and velocity measurement. You will be taken then to the system configuration section that use ADXRS150 yaw rate gyro and SCA3000 3D accelerometer, MEMS sensor selection, the error model for accelerometers and gyro, the error model for GPS, Implementation of the Kalman Filter, System alignment and calibration, and Experimental System performance results.
You will find that this GPS car navigation position availability and accuracy can be improved through this low-cost inertial sensors as well as the advantages of this integrated GPS+MEMS system in map matching technique, does not require installation in all vehicle and can be easily transferred between vehicles.
Read complete article about MEMS Accelerometer and Gyroscope to Improve Car GPS Navigation System Performance in this Application Datasheet Article (source: tkt.cs.tut.fi)
Tags: Acelerometer, car gps navigation system, GPS, gps car navigation, Gyro, gyroscope, MEMS, mems accelerometer, Navigation System, Sensor
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Over the years, I have gone through all the major providers of GPS-enabled mapping software. Eventually settled on Garmin maps as the most up-to-date, most frequently updated. Hating to carry lots of gadgets, though, I have for several years been using Garmin maps on my PDA (Treo 700w).
Worked OK, getting GPS coordinates from a Garmin 10 via blue tooth. But, often required resting reading glasses on the end of my nose so I could make sense of the information and imagines on the small screen. Not particularly safe way to drive, of course.
No need for glasses with the large display on the 260W. I am very glad I went with the wider screen. It’s not so much that there is more to see on the map as it is the case that the device takes full advantage of the wider screen’s capabilities for messages on what’s coming up, icons and boxes that may need to be touched to move among screens, make adjustments. Easier to operate while driving (which, of course, none of us do).
I am also glad that I went for the model that includes vocalizing street names. Does really improve confidence in following the Garmin’s guidance when in unfamiliar areas and makes for safer driving.
As with all such products, local knowledge will sometimes beat the route-finding software. But, it gets you there.
Mine came loaded with City Navigator 2008. As I write this, it’s late March 2008, and the Garmin web site projects that City Navigator 2009 will be out in April. Should determine what your unit comes with and, if it’s 2008, will you get a free upgrade to 2009. Updates are essential in my opinion and a significant annual cost of owning such devices.
I also bought the weighted dashboard mount. It sits unopened as the window mount that comes with the unit works great on my car and the numerous rentals I end up in.
SD card reader slot is interesting. Works fine but what’s it’s purpose? I did put hundreds of photos on it and the Garmin will display them. Picture software is very basic though (e.g., even though related photos are organized by folder on the SD card, slide show program throws everything it can find into one hodgepodge show). Plugged into an USB port (cable not included but you may well have the required one that came with some other device – I did), the Garmin becomes an SD card reader. Maybe that has some value to someone. And, maybe there is just something I am missing here.
Other products provide endless possibilities for customizing screens. This device does not and that took some getting used to. Makes it much simpler to operate though and, after some adjustment, I am generally comfortable with the choices that Garmin decided to make for me.
But 5 stars because just cannot beat the big, wide, bright screen.
I found that garmin product is of high quality albeit the price is also a bit high but it’s worth paying.
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GPS is very useful specially the ones that are put on the Car dashboard. it can really help you drive on unfamiliar places.”:,