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Navigation Vss
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The benefits of portable GPS Navigation systems (Sat Navs) are some what obvious. Portable systems are easily transferable from one car to another, and due to advances in batteries, can be carried and used outside of the car. So if you have two cars in your possession, or hire cars on a regular basis then the portable Sat Nav system is one you really need. In addition, most modern systems plug directly into you home computer, usually via USB. So maps and system software are more easily updated.
With this in mind, the in-car Sat Nav systems seem to have little advantages compared to the portable systems. However, for the single car user, the in-car Sat Nav removes the need of plugging in a Sat Nav unit for every journey, as leaving a portable system in a car is a security risk.
Fixed in-car Sat Navs also have larger and higher quality displays, presumably as they do not need be to attached via a suction cup to the car windscreen, like their portable counterparts, which will effectively only hold up to a certain weight. So less cables and wiring cluttering up your dashboard. Fixed (in-car) systems which use CD or DVD to deliver their mapping data, also double up a DVD player, and some are supplied with a remote for control via back seat passengers. Manufacturer installed Sat Navs are even more integrated into the vehicle, and can also operate the radio and climate control.
In the past features such as bluetooth, POI (points of interest) and touch screens used to be in the realm of in-car Sat Navs only, but are now available on mid to high-end portable GPS systems as well.
A major benefit, which is often overlooked, as it not obvious just by viewing the two systems side to side, is that the fixed systems are a lot more accurate.
Before, explaining this advantage, a little knowledge is needed on how GPS systems know where you are. GPS systems, use receive signals from three separate satellites, high up in orbit around the earth. Three satellites are the minimum required mathematically due to a process of triangulation that will calculate your exact position given the relative distance from the GPS unit to the satellites.
Both the fixed in-car and portable systems use satellite triangulation. However, in-car Sat Navs, also gather data from the vehicles electronics known as speed pulse or Vss. The speed pulse signal is typical used by the cars dashboard to display the speed of the car. In addition, there is a gyroscope embedded in the Sat Nav, that provides information on what direction the vehicle is turning. With this additional data, the GPS knows what speed and direction you are travelling much more accurately than using satellites only. This is especially usefully when the satellite signal is weak, or you are travelling through a covered area such as a tunnel. The problem is that with the extra cabling requirements, fixed systems need to be installed by an experienced mechanic.
In conclusion, the portable Sat Nav units are more convenient and accessible, where as the in-car Sat Navs are more accurate with bigger screens, but require a more complex installation procedure.
S J Massey is a writer for www.carshops247.co.uk, which publishes news and information for the UK motoring scene, including in-car technology such as Satnavs.
3 Tips on Installing a Car Navigation System
Based on the function, different types of navigation system use.
The plug and play, remote and in-dash software use to navigate the car. The GPS Company provides detail instruction about the installation of the different types of navigation system.
1. In-dash navigation systems built with three parts like external antenna, built-in screen, hideaway connection etc. It operates on a special navigation computer to manage the system. The in-dash component installations like stereo. Remote-mount navigation systems connect to the car through Vehicle Speed Sensor (VSS) wire. The VSS give the exact details of speed. Its function is same as the navigation system. The VSS system sends the different pulses based on the speed. The speed is ranging from 800-1000 miles. In some system it connects to the back light of the vehicles so can connect car in the reverse stage. The VSS provides training to the users. It can be available for 24 /7.
2. The gyroscope will provide the details when the vehicle gets turn on the road. The gyroscope is located in ups and down. It can set horizontal also. It is essential to set the gero properly to monitor the turn of the computer.
3. Plug-and-play GPS is easy to install. The receivers use the suction cup mount to directly attach to the windshield. The GPS unit provide power by power adaptor.
The different car navigation systems can be used different monitoring system to navigate car. It is essential to install the proper system depends on the usages. You must have to read the guidelines as per the need.
About the Author
Christy Myers is a writer for GPS Systems , the premier website to find gps, gps systems, gps receiver, gps tracking system, gps map, gps mapping and many more.
The Navigation on my Ford Expedition 2003 is giving wrong reading for distance covered by Vehicle?
Actually the Navigation is going faster than the vehicle itself. I doubt the VSS not giving right input. After severe winters I also noticed the transmission to shift quickly from gear 1 to gear 2. Should I consult a Ford dealer and pay a phenomenal cost to get it fixed or just buy a GPS ?
Actually the Navigation is now misguiding due to incorrect measurement of actual and reported distance covered.
It is more likely that your speedometer is not reading correct! They can easily be off by 5%; usually show that the vehicle is traveling faster than the actual speed. What is the difference is speed readings?
Why buy a GPS? You already have the Nav... Even if the distances are off a little bit.
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