| Title |
The Study on the Inspection Method of CAN Communication Line |
| Authors |
김용은(Yong Eun Kim) ; 이호성(Ho Seong Lee) ; 원종필(Jong Phil Won) |
| DOI |
https://doi.org/10.5573/ieie.2020.57.4.110 |
| Keywords |
Controller Area Network; line; ringing; Fast Fourier Transform; line check; impedance |
| Abstract |
CAN (Controller Area Network) communication is used in the fields where reliability is required. CAN communication features two wire lines connecting multiple electronic control units (ECUs). Therefore, if there is a problem with the line, ECUs cannot communicate with each other. In particular, impedance occurs based on the internal parameters of the wire (resistance, inductance, and capacitance), which distorts signals and causes a ringing phenomenon. Also, clean square waves can be distorted under the influence of the impedance of an ECU input terminal and the joint connector to CAN communication lines. In this study, FFT computation was performed on the square waves (CAN ID) received at a certain location, the method of examining the status of the transmission line from the location to the testing point was proposed, a virtual model of the lines with PSPICE was created to conduct a simulation on the waveforms according to the status of the wire. Using a real wire, the FFT of the waveforms received from the oscilloscope were calculated and it was demonstrated that it is possible to test electric wires using the proposed method. |