Improve automotive ecology, safety and comfort

China's automobile output has surpassed that of the United States and ranks first in the world, and will continue to grow in the next 5-10 years. The China Association of Automobile Manufacturers predicts that the growth rate of automobile output in 2010 will be around 10%, and is expected to reach 15 million units. Many well-known enterprises have emerged in China, including automobile manufacturers, modular system suppliers and component suppliers, electronic equipment manufacturers, etc., especially local autos such as FAW, FAW, BYD, Chery, Geely, Hangsheng, Changan, etc. The considerable progress made by manufacturers in independent development and innovation has driven the rapid development of China's automotive electronics industry.

However, in the face of increasingly complex automotive design needs, especially when launching mid- to high-end and commercial new energy vehicles, the road to independent innovation and development is not smooth. Tektronix experts once took a Toyota Lexus460 car with "more than 100 ECUs and software codes that have reached 7 million lines" as an example at an automotive electronics technology forum held recently, emphasizing that electronic components are particularly important in high-end cars The proportion in China is getting higher and higher. "As shown in Figure 1, automotive electronics is related to the three major market challenges of automotive design, namely, how to meet the requirements of ecology (environmental protection), more comfortable and convenient, and enhanced safety, and the systems and subsystems around these challenges are the current automotive electronics. Hot and difficult points of design. "He pointed out. "The application of local area networks, power systems, electronic control units and digital RFID has played an important role in improving automotive ecology, safety and comfort.

Figure 1: The three major market challenges of automotive design have triggered more design hotspots.

Four test analysis, one can not be less

Tektronix experts emphasized in their speeches that whether they need to improve fuel efficiency or adopt new energy power transmission systems, or body and audio-visual entertainment systems that help improve driving and entertainment comfort, or safe driving systems such as braking and steering, The use of local area networks (LAN) is constantly increasing to achieve transmission control, body control, or various X-by-wire control operations; due to the need to improve the energy consumption efficiency of the car, the engine control unit and power supply of the car Systems have become more complex, and hybrid and clean fuel diesel engine technologies require advanced electronic control systems to ensure safety and environmental protection; the use of electronic control units (ECUs) to control basic automotive systems and non-basic automotive systems is becoming a new industry standard. These ECU is based on digital technology (MCU, FPGA and other devices), which requires a deeper understanding of complex timing and signal integrity issues; automotive safety systems use tire pressure monitoring (TPMS) and RFID systems, and need to develop and measure real-time RF systems. Efficiently monitor vehicle operation and status.

(1) LAN analysis

Tektronix experts explained in the speech that automotive design is integrating various serial data technologies and applications to realize LAN, such as CAN, LIN, MOST and FlexRay. Serial communication can improve circuit board design, because the serial interface is integrated into processors, ASICs, FPGAs and other devices, which reduces the number of connections and the total cost of components. The final automotive design usually includes multiple serial standards, mixed signals, mixed data rates, single-ended signals, and differential signals. This requires an integrated and easy-to-use high-quality test and analysis solution to complete the timing and signal between signals Integrity test analysis and debugging.

For the debugging of low-speed serial buses such as CAN and LIN commonly used in automobiles, Tektronix 'DPO / MSO4000 series oscilloscopes provide simple, easy-to-use, complete, and high-quality triggering, capturing, and decoding solutions. As shown in Figure 2, the oscilloscope series provides search and mark functions, which can display the decoded CAN message frames with time marks in the event table. This function is not available in other competitive products.

Figure 2: Tektronix DPO / MSO4000 series oscilloscope CAN solution.

For the emerging high-speed differential serial bus FlexRay, the DPO / MSO4000 series also provides debugging solutions. Tektronix FlexRay physical layer analysis software DPO4AUTOMAX also fully supports physical layer analysis, providing a complete set of tools to evaluate physical layer performance, including eye diagram analysis, simultaneous measurement, timing measurement, time interval error (TIE), and can be through USB or Ethernet works with external computers

(2) Test and analysis of power system

The power system is undoubtedly the heart of the car, and the high-quality and stable operation of the electronic circuits related to the power system will largely determine the performance of the vehicle, including both the electronic control part realized by the ECU and the power supply circuit of the car. Especially new energy vehicles.

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