Abnormality detection method and system having sleep mode check function
First Claim
1. An abnormality detection system comprising:
- a network including a plurality of electronic control units for respective controlled devices, the control units being constructed to transmit respective data frames;
a communication line; and
an abnormality detection unit connected to the network through the communication line for collecting abnormality monitor information of the controlled devices based on the transmitted data frames, wherein the control units are constructed to shift to a sleep mode after a predetermined wait period under a condition that no activation cause is present, wherein the control units are constructed to transmit, in the data frames, identification information thereof and sleep NG information indicative of sleep disablement when the unit activation cause is present, and wherein the detection unit includes transition detection means for detecting a transition of the controlled devices from an operation condition to an operation stop, and activated unit detection means for monitoring the transmitted sleep NG information after the controlled devices shifted to the operation stop condition and detecting the control unit which remains activated after the predetermined wait time.
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Accused Products
Abstract
A plurality of electronic control units is continuously supplied with electric power to be capable of communication one another even when respective controlled devices are in inoperative condition. Each ECU transmits a sleep NG information along with its device ID when it not allowed to remain in the sleep mode. An abnormality detection unit connected to the ECUs through communication lines monitors the sleep NG information of each ECU to detect the ECU remaining activated for more than a wait period which is required for the ECU to shift to the sleep mode. The device ID of the ECU which is detected as remaining activated is stored in a memory so that any abnormal location may be specified by the stored device ID.
25 Citations
8 Claims
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1. An abnormality detection system comprising:
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a network including a plurality of electronic control units for respective controlled devices, the control units being constructed to transmit respective data frames;
a communication line; and
an abnormality detection unit connected to the network through the communication line for collecting abnormality monitor information of the controlled devices based on the transmitted data frames, wherein the control units are constructed to shift to a sleep mode after a predetermined wait period under a condition that no activation cause is present, wherein the control units are constructed to transmit, in the data frames, identification information thereof and sleep NG information indicative of sleep disablement when the unit activation cause is present, and wherein the detection unit includes transition detection means for detecting a transition of the controlled devices from an operation condition to an operation stop, and activated unit detection means for monitoring the transmitted sleep NG information after the controlled devices shifted to the operation stop condition and detecting the control unit which remains activated after the predetermined wait time. - View Dependent Claims (2, 3, 4, 5)
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6. An abnormality detection method including a plurality of electronic control units for respective controlled devices and an abnormality detection unit connected to the control units through a communication line, the method comprising the steps of:
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continuously supplying the control units and the detection unit with electric power to enable communication one another even when respective controlled devices are in operation stop condition;
transmitting a sleep information from each control unit along with its unit ID to indicate whether it is allowed to shift to a sleep mode from an activated mode;
monitoring the sleep information of each ECU to detect the control unit remaining activated for more than a wait period required for the control unit to shift to the sleep mode; and
storing the unit ID of the ECU which is detected as remaining activated so that any abnormal location may be specified by the stored unit ID. - View Dependent Claims (7, 8)
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Specification