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为 了 进 一 步 提 高 电 动 客车 C A N 网 络 系 统 的 可 靠性,致远电子 使用CAN S -cope-Pro为金龙客车制定了全面的可靠性测试:
◆ 位宽度容忍测试:验证客车CAN节点在波特率波动情况下是否会死机;
◆ 报文压力测试:验证客车CAN节点在大数据量负载情况下是否会死机;
◆ 错误波特率压力测试:验证客车CAN节点在错误波特率情况下是否会死机;
◆ 抗干扰能力测试:验证客车CAN节点在高强度干扰情况下是否会死机;
图9: 眼图反溯查找故障节点
图7: 正常CAN收发器的眼图
图8: 亚损坏CAN收发器的眼图
图6: 眼图分析幅值与脉宽情况
14 CAN Newsletter China
App
licat
ions
Highly Robust Operator Interfaces
www.ttcontrol.com/HY-eVision2
General PurposeECUs
SafetyCertifiedECUs
Safe I/O Modules
Operator Interfaces
I/O Slave Modules
HY-eVision² FamilyUsability• Excellent sunlight readability• Ability to display videos and PDF documents• Programming and debugging facilitated by CODESYS®
Performance • Best-in-class CPU performance • OpenGL graphics with hardware acceleration• Fast boot-up time• Instant-on with suspend functionality
Connectivity • Optionally GPS and GSM enabled• Two camera interfaces with picture-in-picture functionality• Up to 4 CAN interfaces