42 results about "Failure detection and isolation" patented technology

Method for detecting faults in a device comprising the steps of receiving a plurality of performance parameters, applying the plurality of performance parameters to a first model to produce a plurality of estimated performance parameters, applying the plurality of performance parameters to a second model to produce a plurality of estimated device parameters, computing a plurality of residuals from the plurality of estimated device parameters, computing a plurality of distance measuring from the plurality of residuals, detecting at least one parameter deviation using the plurality of residuals and the plurality of estimated performance parameters, and setting at least one detection flag if the detected at least one parameter deviation is persistent.

The invention discloses an intelligent distribution network oriented distribution type fault detection and isolation system and a working method. The distribution type fault detection and isolation system comprises intelligent power distribution terminals arranged in each measurement point of the intelligent distribution network, and a management maintenance work station arranged in a transformer substation; the intelligent power distribution terminals are in peer-to-peer communication; and the intelligent power distribution terminals and the management maintenance work station are in master-slave mode communication. The intelligent distribution network oriented distribution type fault detection and isolation system has the beneficial effects that the management functions of the management maintenance work station on remote measuring, remote signaling, remote control and the intelligent terminals can be realized due to the communication between the intelligent power distribution terminals, and the communication between intelligent power distribution terminals and the management maintenance work station; and the intelligent power distribution terminals can realize peer-to-peer fault information interaction with adjacent intelligent power distribution terminals according to the current network topology so as to realize accurate and effective isolation for the fault regions, and satisfy the demands of rapidness, flexibility and reliability of the intelligent distribution networks on the fault detection and isolation.

The invention provides a novel detecting and isolating system for a fault of a RS-485 port, which comprises a bus and a plurality of slave nodes connected with the bus, wherein each of the slave nodes comprises an RS-485 communication circuit, an MCU (Micro Controller Unit) and a relay; the MCU is connected with a normally opened end of the relay and the RS-485 communication circuit; and the relay is connected with the RS-485 communication circuit and an RS-485 bus. The slave nodes of the novel detecting and isolating system for the fault of the RS-485 port can judge whether the RS-485 bus communication is abnormal or not. If the communication is abnormal, the slave nodes can automatically disconnect from the RS-485 system bus and can carry out data communication with the RS-485 communication circuit through IO ports of the slave nodes, so as to detect whether the RS-485 communication circuit can normally work or not.