METHOD AND APPARATUS FOR SHORT FAULT ISOLATION IN A CONTROLLER AREA NETWORK
First Claim
Patent Images
1. A controller area network (CAN) comprising:
- a CAN bus including a CAN-H wire and a CAN-L wire;
a pair of CAN bus terminators located at opposite ends of the CAN bus, each terminator having a corresponding known terminator resistance value;
a plurality of nodes including controllers wherein at least one of said controllers comprises a monitoring controller; and
said monitoring controller comprising a detection control routine for identifying fault-types on the CAN bus, comprising the following steps;
determining a set of CAN bus parameters; and
identifying fault-types based upon the CAN bus parameters.
1 Assignment
0 Petitions
Accused Products
Abstract
A controller area network (CAN) includes a CAN bus having a CAN-H wire, a CAN-L wire, and a pair of CAN bus terminators located at opposite ends of the CAN bus. The CAN further includes a plurality of nodes including controllers wherein at least one of the controllers is a monitoring controller. The monitoring controller includes a detection control routine for isolating faults on the CAN bus including measuring a CAN-H wire voltage, measuring a CAN-L wire voltage, and isolating a short fault based upon the CAN-H wire voltage and the CAN-L wire voltage.
-
Citations
15 Claims
-
1. A controller area network (CAN) comprising:
-
a CAN bus including a CAN-H wire and a CAN-L wire; a pair of CAN bus terminators located at opposite ends of the CAN bus, each terminator having a corresponding known terminator resistance value; a plurality of nodes including controllers wherein at least one of said controllers comprises a monitoring controller; and said monitoring controller comprising a detection control routine for identifying fault-types on the CAN bus, comprising the following steps; determining a set of CAN bus parameters; and identifying fault-types based upon the CAN bus parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A controller area network (CAN) comprising:
-
a CAN bus including a CAN-H wire and a CAN-L wire; a pair of CAN bus terminators located at opposite ends of the CAN bus, each terminator having a corresponding known terminator resistance value; a plurality of nodes including controllers wherein at least one of said controllers comprises a monitoring controller; and said monitoring controller comprising a control routine for identifying a plurality of fault-types on the CAN bus, comprising the following steps; sampling a predetermined number of data points comprising a respective CAN-H wire voltage and a respective CAN-L wire voltage; subjecting the data points to a set of pass/fail tests; for each test, producing a pass count; for each fault-type, evaluating the pass counts against respective count requirements; and identifying the fault-type when all respective count requirements corresponding to the fault-type are satisfied. - View Dependent Claims (11)
-
-
12. A controller area network (CAN) comprising:
-
a CAN bus including a CAN-H wire and a CAN-L wire; a pair of CAN bus terminators located at opposite ends of the CAN bus, each terminator having a corresponding known terminator resistance value; a plurality of nodes including controllers wherein at least one of said controllers comprises a monitoring controller; and said monitoring controller comprising a control routine for identifying a plurality of fault-types on the CAN bus, comprising the following steps; sampling a predetermined number of data points comprising predetermined CAN bus parameters; subjecting the data points to a set of pass/fail tests; for each test, producing a pass count; for each fault-type, evaluating the pass counts against respective count requirements; and identifying the fault-type when all respective count requirements corresponding to the fault-type are satisfied. - View Dependent Claims (13, 14, 15)
-
Specification