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Digital movement recording apparatus with reduced memory consumption

  • US 5,218,543 A
  • Filed: 03/06/1991
  • Issued: 06/08/1993
  • Est. Priority Date: 03/07/1990
  • Status: Expired due to Fees
First Claim
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1. A digital movement recording apparatus for recording a moving condition of a vehicle onto a record medium having a first record area and a second record area which is removably inserted therein, said moving condition being recorded for each of a plurality of independent movements, each of said independent movements being identified by a starting time and an ending time thereof, said digital movement recording apparatus comprising:

  • movement starting detecting means for detecting starting of a movement of said vehicle;

    movement ending detecting means for detecting ending of a movement of said vehicle;

    time counting means for starting counting of a time in response to ending of a movement of said vehicle;

    determining means for determining, in response to starting of a movement of said vehicle, whether a movement is a part of a preceding independent movement;

    writing means for recording time data in response to a starting of a movement of said vehicle, said time data being representative of a time of said starting, and being recorded into said first record area of said record medium thereby forming a first recorded portion, said writing means then recording movement data representative of a moving condition of said vehicle successively into said first record area of said record medium, thereby forming a second recorded portion subsequent to the first recorded portion, said writing means also stopping, in response to ending of the movement of said vehicle, recording of movement data and then recording time data representative of a time of said ending of said movement into said first record area of said record medium, subsequent to the second recorded portion, and said writing means further recording address data representative of an address of a portion of said first record area at which the ending time data is recorded, into said second record area, and said writing means recording the counted time by said time counting means into said first record area of said record medium, subsequent to the second recorded portion of said movement data representative of a moving condition of said vehicle if said determining means determines that a movement is a part of a preceding independent movement; and

    erasing means for erasing last time data representative of an ending time of a movement of said vehicle, and the address data representative of the address of said first record area of said record medium at which the last time data are recorded, from said first and second record areas of said record medium, respectively, when said determining means determines that a movement is a part of a preceding independent movement.

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