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Process and apparatus for monitoring of vehicle crawler chains of a vehicle during driving

  • US 5,300,925 A
  • Filed: 03/23/1992
  • Issued: 04/05/1994
  • Est. Priority Date: 03/21/1991
  • Status: Expired due to Fees
First Claim
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1. A process for monitoring at least one vehicle crawler chain for malfunctions during a driving operation with respect to an unacceptable change of pitch of links of the crawler chain so as to impair the driving operation, comprising the steps of monitoring an actual running sound of said crawler chain, triggering a defect signal for said crawler chain, when said unacceptable change of pitch occurs during the driving operation, due to said defect signal exceeding a median running sound of an intact crawler chain, assigning to the median running sound a threshold pitch of the crawler chain to trigger the defect signal, and emitting a warning signal when a given signal frequency associated with the unacceptable change of pitch is above the threshold pitch, wherein the given signal frequency is determined by generating a number of n-pulsed for each tooth of the driving gear which correspond to each pitch of the crawler chain, counting the thus generated pulses to obtain a count, starting the counting again at one, when a value is reached which corresponds to n-times the number of all the pitches of the crawler chain, using the count for determining the rotating position of the pitches of the crawler chain, and adding up separately for each of the links of the crawler chain the number of said defect signals during a given time period.

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