At present, many vehicles are equipped with a car networking terminal, which can conveniently and efficiently connect satellites to achieve vehicle positioning, and can automatically connect communication base stations and send the parsed information to third parties. For car networking terminals, electromagnetic waves need to be used as a carrier to achieve their functions. Therefore, EMC testing of wireless terminal devices becomes more and more important. Only through EMC testing can the stability of T-BOX (TelemaTIcs BOX) be guaranteed. Vehicle networking terminals have diverse functions and complex technologies. Simulating their normal operating conditions in EMC tests is a technical challenge. This article will discuss in detail how to simulate the normal operating conditions of the T-BOX in the EMC test.
Car T-BOX's working principle, function and applicationTBOX includes: 4G module, MCU processor, CAN bus, audio processing, power management, external interface several parts.
Figure 1 TBOX system block diagram
Connector-Connector; Interface Circuit-Interface Circuit; MCU-Microprogramming Controller; Charger-Charger, Module-Module, Audio CODEC-Audio Codec;
T-BOX provides a remote communication interface for the vehicle as a wireless gateway. It can provide traffic data acquisition, track recording, vehicle fault monitoring, vehicle remote control (open and close locks, air conditioning control, window control, torque limit of the transmitter, engine start-stop ), driving behavior analysis, 4G wireless hotspot sharing and other services.
The T-BOX is a device installed on a vehicle and powered by a vehicle-mounted power supply. It is mainly composed of a host computer, a satellite antenna, a mobile antenna, a power harness, and a fuse box. The host has integrated a satellite communication module and a mobile communication module. Figure 2 shows.
Fig. 2 Schematic diagram of the terminal of the car network
When the host is powered on, the car T-BOX can deeply read the car Can bus data and private protocol. The satellite signal module can collect satellite information in real time and analyze the information. The mobile communication module uploads the parsed location information to the background through the mobile network. server. Cooperate with other on-board sensors to upload vehicle information to third parties. Through computer technology, a large amount of vehicle information is analyzed and processed to calculate the best route for different vehicles, report road conditions in a timely manner, arrange signal light cycles, and even remotely cut off oil and power to achieve anti-theft intervention.
Figure 3 T-BOX function plan
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