1. Basics:
After the advent of GPS, it was quickly widely used in the field of navigation and positioning. With the continuous maturity of GPS system technology and economic development, people not only require positioning, scheduling, and alarm functions, but also navigation, entertainment, and multimedia functions. And its appearance is required to be small and beautiful.
2. System requirements:
The four main demands of the vehicle-mounted system:
· Monitoring-vehicle safety, vehicle security anti-theft device, safe driving detector, collision detector.
· Navigation-road condition information: traffic information network, electronic map, GPS.
· Communication-Call Center, GPRS / GSM.
· Multimedia-Audio Player, Video Player, PDA, etc.
As a mature product, GPS terminal equipment itself has the following requirements:
1) High stability: terminal equipment can work stably for a long time under high temperature in summer and low temperature in winter
2) Strong anti-magnetic and anti-vibration: The terminal equipment has relatively high anti-vibration and anti-magnetic requirements on the car, so there will be no crash
3) Small size: The space in the car is small. The terminal equipment should be placed in a hidden place in the car that is not easy to find. The space occupied should be small.
4) Convenient operation: Provide button mode or touch screen mode on the display to facilitate the driver's response
5) Fast operation speed: During data upload and download, the data processing speed is required to be fast
6) Great scalability: As the technology matures, the functions of the terminal equipment will be expanded without the need to completely replace it
Third, the vehicle GPS system architecture The current vehicle GPS system terminal is usually composed of several parts: GPS module, wireless communication module, alarm control module, voice control module, display module and vehicle PC: 
1. GPS module: a small device installed on the vehicle, which is a part of the GPS vehicle-mounted unit, used to receive the information transmitted by the satellite.
2. Wireless communication module: Usually use car wireless telephone, radio station or mobile data terminal (MDT) to complete the information exchange function.
3. Alarm control module: send an alarm signal to the monitoring center network to notify the vehicle of abnormal information.
4. Voice control module: complete functions such as voice control and service.
5. Display module: It is used to display video image information such as location and road conditions. LCD, CRT or TV display can be selected.
6. Vehicle-mounted PC: Integrate and process each function module and cooperate with the corresponding software to complete the specified functions, such as data processing, calculate the longitude, latitude, altitude, speed and time of the location.
Due to the particularity of the use environment, the vehicle-mounted PC as the core of the system must be small in size, high in integration, low in power consumption, strong in processing power, and easy to operate. Currently, in-vehicle PCs often use embedded operating systems, such as WINDOWS CE and embedded Linux. According to the requirements of frequent use of vehicles and the complexity of roads, it must have high reliability and good scalability and compatibility. ARBOR ’s embedded micro motherboard can better meet the above requirements and provide safe and reliable for vehicle PC Hardware platform.
Four, system plan:
Typical solution of in-vehicle PC——Vida EPIC specification series motherboard
Vinda ’s NANO series motherboards comply with the EPIC specification and are jointly developed by the world ’s five largest embedded motherboard manufacturers. Its size is 115mmX165mm, which is smaller than the EBX specification. In this specification, all the functions of EBX are provided.
1. NANO series motherboards provide 4 COM ports, which can connect more serial devices;
2. On-board CF / IDE interface, you can plug in CF card and DOM to improve the characteristics of hard disk that is easily damaged in vibration. At the same time, Vinoda's NANO series motherboards all provide standard versions of WINCE.NET and WINXP Embedded to avoid customers developing their own operating platforms and reduce the time for system integrators to develop systems;
3. EPIC stipulates the location area of ​​the peripheral interface. The location of the external interface of all NANO motherboards is the same, which is convenient for system integrators to choose different levels of NANO motherboards with different applications without changing the chassis design
4. The motherboard provides PC104 / PC104 PLUS interface, which is convenient for expanding other functions required by the system;
5. GPS module: GPS-01 module with RS-232 interface (specially designed car PC GPS module);
6. Power module: The main board provides a single 12V power supply function. By using a 12V-12V DC stabilized power supply equipped with an intelligent voltage stabilization chip, even a severe short-term voltage imbalance can be stabilized instantaneously, eliminating the impact of voltage problems on the operation of the machine Worries.
Complete the following functions:
1. Vehicle positioning, scheduling, and alarm functions 2. Navigation function
3. Wireless Internet function 4. Entertainment function ……
The main specifications and performance of Vida's NANO series products are as follows:
NANO-7240 new EPIC specification, onboard ultra-low power Intel Celeron 400MHz processor, VT8606 chipset, with LCD / CRT VGA display interface, network, audio 
NANO-7240 new EPIC specification, onboard ultra-low power Intel Celeron 400MHz processor, CLE266 chipset, support 36-bit LVDS / TTL LCD, network, audio
NANO-7270 new EPIC specification, Socket 479 architecture, support Intel PenTIum M processor, 533MHz external frequency, VGA interface with LCD / CRT display function, GbE, USB2.0, audio suitable for video capture, etc. which have high CPU requirements application.
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