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CAN-bus in Caravans
2005 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis covers the introduction of a controller area network (CAN) to a house trailer or caravan. The past two decades have seen a large invasion of micro-controllers in modern vehicles. This is due in part to the miniaturization and decrease in costs of electronics, but also for the increase of services. These services include comfort, safety, diagnostics and fail-safes. Comfort such as controlled temperature or automatic wipers. Safety has the form of anti-lock braking systems (ABS) and electronic stability program (ESP). Diagnostics address the detection of failed systems or the failure of one of its components, while fail-safes enables the systems to achieve a graceful degradation of performance when parts of the system have failed. The increase of electronic control units (ECUs) has resulted in an increase of wiring, which is very expensive and also weights much. Those also are two issues undesirable on a caravan where ECUs can bring an increase of services. The answer to the problem has been the development of a communication network between the ECUs through which messages are sent. The ECUs are referred to as nodes on the network. The system developed consists of four nodes connected together with the Controller Area Network (CAN): front and rear control units, a combined yaw rate and acceleration sensor and a control panel. As a whole, this base system controls all the lights on the outside of the caravan that are normally connected directly to the car. The most important benefit of this system is the cable reduction, but another advantage is the possibility to control the outdoor lights from the control panel. The front control unit converts the light signals coming from the car to CAN-bus messages. The rear control unit receives these messages and converts them back to light signals. On the same bus and at the same time the control panel can monitor the status of the light bulbs in the tail light ramp. Furthermore the control panel can send dimmer control messages to maneuver the dimmer output on the front control unit. In addition to this, the system contains an in and outdoor temperature sensor, a yaw rate and acceleration sensor. All of this information is available on the CAN-bus and presented on the display in the control panel.

Place, publisher, year, edition, pages
Keyword [en]
Technology, can, Controller Area Network
Keyword [sv]
URN: urn:nbn:se:ltu:diva-44248ISRN: LTU-EX--05/074--SELocal ID: 20a8d9a6-e0cd-4e40-8837-988914abc199OAI: diva2:1017524
Subject / course
Student thesis, at least 30 credits
Educational program
Electrical Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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