Patents by Inventor Rain Jilin Zhang

Rain Jilin Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10475612
    Abstract: An electrical relay system is configured to allow for failure detection of a relay by injecting a signal at a common contact of the relay and looking for the signal at a normally closed contact of the relay. If the relay is commanded to be “off,” or closed, and the injected signal is not detected through the normally closed contact of the relay, then the system can determine that a failure condition has occurred. In one aspect, the system can include multiple relays with the signal being injected at a common node of the relays. In another aspect, the system can include multiple controllers for controlling and/or monitoring the electrical relay system. The electrical relay system can be coupled to screw terminals for connecting to a field device as part of an industrial automation system.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: November 12, 2019
    Assignee: Rockwell Automation Asia Pacific Business Center, Pte. Ltd.
    Inventors: Rain Jilin Zhang, Edward C. Hopsecger, Joseph G. Vazach
  • Publication number: 20180315565
    Abstract: An electrical relay system is configured to allow for failure detection of a relay by injecting a signal at a common contact of the relay and looking for the signal at a normally closed contact of the relay. If the relay is commanded to be “off,” or closed, and the injected signal is not detected through the normally closed contact of the relay, then the system can determine that a failure condition has occurred. In one aspect, the system can include multiple relays with the signal being injected at a common node of the relays. In another aspect, the system can include multiple controllers for controlling and/or monitoring the electrical relay system. The electrical relay system can be coupled to screw terminals for connecting to a field device as part of an industrial automation system.
    Type: Application
    Filed: April 27, 2017
    Publication date: November 1, 2018
    Inventors: Rain Jilin Zhang, Edward C. Hopsecger, Joseph G. Vazach
  • Publication number: 20120197586
    Abstract: An I/O circuit for measuring temperatures within an industrial control system uses a stored empirical model together with input from at least one reference temperature sensor to determine inter-terminal temperature differences for more accurate cold junction compensation.
    Type: Application
    Filed: February 1, 2012
    Publication date: August 2, 2012
    Inventors: Rain Jilin Zhang, Ting Wu, Forrest Xu Caigang