The invention is a data acquisition system including a condition responsive sensor for producing an analog signal indicative of a given variable condition, a delta modulator circuit connected to receive and convert the analog signal into a modulated pulse train indicative of the given condition, an encoder circuit connected to receive and convert the modulated pulse train into an audio output signal, and a recorder connected to receive and record the audio output signal. The encoder produces Harvard phase coding of the modulated pulse train and produces an audio output signal in a range between 1000 and 3000 Bauds that is compatible with cassette tape recorders.

  • Supplemental Notes:
    • This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of application available NTIS.
  • Corporate Authors:

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Long, L E
    • Sarkisian, E A
  • Publication Date: 1980-6

Media Info

  • Pagination: 14 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00318730
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-6-158 907, DOT/CASE/TSC-10147
  • Files: TRIS, USDOT
  • Created Date: Oct 27 1980 12:00AM