Patents by Inventor Chris Hoffmann

Chris Hoffmann 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: 12259493
    Abstract: A method and a radar target simulator for generating a simulated radar echo signal. A radar signal is sent with known bandwidth from a radar sensor to be tested. The radar signal is received in the radar target simulator. The radar signal is filtered via a low-pass filter with known filter curve. The frequency spectrum of the filtered radar signal over the full bandwidth of the low-pass filter is determined. A corrected frequency spectrum and the power of a radar signal corresponding to the corrected frequency spectrum are calculated. A scaled radar signal from the filtered radar signal and the radar echo signal as a reflection of the scaled radar signal are calculated. The radar echo signal is sent from a transmitting antenna of the radar target simulator to the radar sensor to be tested.
    Type: Grant
    Filed: November 18, 2022
    Date of Patent: March 25, 2025
    Assignee: dSPACE GMBH
    Inventors: Bastian Hellweg, Chris Hoffmann, Tim Fisch
  • Publication number: 20240385289
    Abstract: A testing device for testing a distance sensor includes: a receiving element for receiving an electromagnetic free-space wave as a received signal; an emission element for emitting an electromagnetic output signal; and a signal processing unit. During a simulation operation, the received signal or a received signal derived from the received signal is guided via a signal processing unit with a predefinable time delay to form a time-delayed signal as a simulated reflection signal. The signal processing unit is configured to fully process a received temporally coherent and temporally limited sensor signal or a received temporally coherent and temporally limited sensor signal derived from the received sensor signal in a delay step with the predefinable time delay as a constant working time delay to form a time-delayed sensor signal, wherein the predefinable time delay was predefined at the start of the delay step.
    Type: Application
    Filed: July 12, 2022
    Publication date: November 21, 2024
    Inventors: Sebastian GRAF, Christian HOHENBRINK, Chris HOFFMANN, Tim FISCH
  • Publication number: 20230168342
    Abstract: A method and a radar target simulator for generating a simulated radar echo signal. A radar signal is sent with known bandwidth from a radar sensor to be tested. The radar signal is received in the radar target simulator. The radar signal is filtered via a low-pass filter with known filter curve. The frequency spectrum of the filtered radar signal over the full bandwidth of the low-pass filter is determined. A corrected frequency spectrum and the power of a radar signal corresponding to the corrected frequency spectrum are calculated. A scaled radar signal from the filtered radar signal and the radar echo signal as a reflection of the scaled radar signal are calculated. The radar echo signal is sent from a transmitting antenna of the radar target simulator to the radar sensor to be tested.
    Type: Application
    Filed: November 18, 2022
    Publication date: June 1, 2023
    Applicant: dSPACE GmbH
    Inventors: Bastian HELLWEG, Chris HOFFMANN, Tim FISCH
  • Patent number: 6217627
    Abstract: An air cleaner for purifying air is disclosed. The air cleaner includes a housing having a first shell mounted to a second shell. The air cleaner also includes a filter disposed within the second shell and having a first side and a second side. Also, the air includes a flexible seal disposed between the first side of the filter and the first shell of the housing. At least one cam is rotatably mounted to the second shell and adapted to selectively engage the second side of the filter to compress the seal between the first side of the filter and the first shell of the housing.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: April 17, 2001
    Assignee: Siemens Canada Limited
    Inventors: Frank Vyskocil, Chris Hoffmann