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Power-over-Coax Filter Design Challenges for Automotive Vision Applications

2.3.2018
Reading Time: 2 mins read
A A

source: Valeo Autoklimatizace k.s., EPCI e-Symposium

Abstract:

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Automotive industry has been facing exciting and important challenges in recent years. It is not only the move from classic combustion engine cars to hybrid or fully electrical vehicles.  Much more is going on in the field of Advanced Driver Assistance Systems (ADAS) helping to make roads and surrounding areas a safer place for everyone.

The irreplaceable part of every ADAS system is a sensor, or more often, a group of sensors providing data to the Electronic Control Unit (ECU) which processes the data in a real time. The role of the sensors in the system is critical as the data provided has a huge impact on the system performance.  While there are many various types of sensors used in the Automotive industry, such as Radar, Ultrasonic, Lidar, this paper focuses on Camera – the most important sensor used in Vision Active Safety Systems.

Given by the nature of the target scenario and the type of the vision system (Rear View Camera, Surround View System, Driver Monitoring System), the automotive cameras are often installed in remote locations such as trunk lids, bumpers or rear view mirrors. This can make the connection between the sensors and controlling unit at least several meters long in case of passenger cars and easily more than 10m in case of large pick-ups or trucks.  There are normally three different types of signals which are needed to be transferred between the camera and ECU – serialized video data, both-direction communications and DC power. Depending on the system type and required functionality, two or three pairs of wiring are needed for the sensor connection. This brings weight and cost to the system design and it is therefore advisable to limit the number of wires used for such a connection.


Title: Power-over-Coax Filter Design Challenges for Automotive Vision Applications
Authors: Luděk Šubrt
Organisation(s): Valeo Autoklimatizace k.s.
Symposium: 1st PCNS Passive Components Networking Days, 12-15th Sep 2017, Brno, Czech Republic
Reference: Plenary paper II., Keynote Speech, PCNS2017 Proceedings Pg.8-11
ISBN: 978-80-905 768-8-9
e-Sessions  Applications: Automotive
e-Sessions Scope Components: Filters, Inductors
e-Sessions Topics: Circuit Design, Measurement & Test


read the full paper in pdf here

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