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Acceleration/deceleration alarm system

  • US 4,070,562 A
  • Filed: 06/24/1976
  • Issued: 01/24/1978
  • Est. Priority Date: 08/28/1975
  • Status: Expired due to Term
First Claim
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1. An acceleration/deceleration alarm system comprising:

  • speed measuring means for generating a train of pulses having a frequency proportional to the running speed of a vehicle;

    first counting means for counting the number of said pulses applied from said speed measuring means during an (i)th constant time interval;

    second counting means for counting down the count value of said first counting means in response to said pulses applied from said speed measuring means after the lapse of said (i)th constant time interval until the time when said count value is counted down to zero;

    third counting means for counting the number of said pulses applied from said speed measuring means after the completion of the counting operation of said second counting means;

    control means for controlling the successive operating time interval of said second and third counting means to an (i+1)th constant time interval which follows from said (i)th constant time interval so that the count value of said second counting means is proportional to the decelerating speed difference between said (i)th and (i+1)th constant time intervals when said (i+1)th constant time interval terminates during the counting operation of said second counting means and so that the count value of said third counting means is proportional to the accelerating speed difference between said (i)th and (i+1)th constant time intervals when said (i+1)th constant time interval terminates during the counting operation of said third counting means;

    setting means for presetting a reference value;

    comparing means for comparing the count value of said second and third counting means with said reference value preset by said setting means; and

    alarm means for giving a warning when said count value applied to said comparing means exceeds said reference value.

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