12/28/2022 0 Comments Old royaltek gps data logerThe metal shieldingcover should Electroplated and connected to Ground well. Make sure GPS part lives in clean and quiet environment: no any type of components under it or it could be accetable worsely: make sure gps part on the top of all components. The GPS part should be placed away from other metal components and other chip components, resistors, capacitors, inductors. So engineers would consider much more on layout of PCB. in the design trends, GPS part is designed smaller and internal in devices. One good method is that keeping using the same old position coodinates in coming data string when engine status is off or no trembles.ĭelicate hardware design requires the experienced hardware engineers' work. But we can filter these driftings by monitoring other important factors like engine on/off status, trembles status intensity level and time of duration-no trembles or slight trembles indicate no car running, speed offered by GPS-car can't drive 200km/h instaneously when it was 0km/h seconds ago, mileage taken-car can't fly hundreds miles away in seconds. GPS drifting issue can't be eliminated due to the restriction of GPS by US military and GPS signal reception. Good algorithm in firmware means a robust firmware structure which can handle most known or unknown bugs. So manufacturers can make most of the three GPS modules meeting client’s need. These drawbacks for Sirf III and MTK GPS (even uBlox) can be avoided by the good algorithm in firmware or the delicate hardware design or professional installation especially the better gps antenna location. What can we do to improve the GPS performance? Clients’ needs are not same mostly because most of them are trying to control and manage their own different vehicles or fleets. GPS tracking business is more like the niche market. In view of different and specific needs for GPS tracking, people would choose the right modules for their customization. These three GPS chips are popular on the market especially in Chinese GPS tracking manufacturers. GPS tracker shows the dead-reckoning between containers in sea port ↓ GPS tracker shows the dead-reckoning in underground parking and tunnels ↓ Even in severe environment with plenty of containers and weak GPS signal, NEO-M8U or NEO-M8L still has good performance With Ublox GPS chip M8U or M8L, we developed a wonderful feature: dead-reckoning, which allows you to track your car in underground parkings or in tunnels. You want to know the uBLox GPS accuracy in real life? Checking below! ![]() The craftsmanship and appearance of Ublox are better. Also the GPS signal acquisition is best if the vehicles come out of the tunnels. it acquires GPS signal very fast whatever the vehicles are moving or still. Ublox GPSit works very stable and good performance. The accuracy of GPS signal when the vehicles are still would be a little wild sometimes. The techniques may be a little old comparing to the Ublox GPS module nowadays. Globalsat and RoyalTek GPS modules are based on the Sirf Star III. Sirf III GPS the cost and performance are between Ublox and MTK GPS. If the vehicle comes out of tunnel, it may take some time to get the GPS signal. it has a little bad performance in GPS signal acquisition and stability. MTK GPS newcomer in GPS tracking business, and fast-growing. In the GPS tracking business, many manufacturers and designers use GPS modules as below: Ublox, Sirf Star III and MTK GPS.īelow are the comparisons between the three GPS chips based on our designing and manufadturing experience: so, which mode is better? i don't have some plan of this gps parameters :-)) i only know that NMEA is pure ASCII text.Simple Comparison for GPS Modules: Ublox, Sirf III and MTK GPS NMEA or SIRF? i seen with the software from CD we can set it and upload to the receiver. maybe that's why i had the "problems" from point 1. what's correct? for the test on street i used 57600. but in the user manual on the CD i seen 57600 bps. on i seen the baud rate must be 38400 bps. with other receiver i had still like 6-8 (small differez).ģ. ![]() why that? first: its a fast switch(every 1-2 sec.). i wondering that the available satelit are changing every 1-2 second from 2-10 satelit. with mobile navigator 4 i see the signal status. Why so long? with an other gps receiver i had like 3-5 sec.Ģ. after i driven out from a tunnel, the receiver needed about 25 sec. ![]() Today, i startet testing the receivers (yes, i got both vom pretec, normal and mini :-))ġ. I have some questions about the pretec bluetooth gps receivers.
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