Spark monitor device for current collectors
First Claim
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1. A device for monitoring sparks generated at a current collector in a rotary machine comprising:
- means for receiving high frequency noise derived from sparks generated at the current collector and producing a first signal corresponding to an amplitude modulating component detected from said high frequency noise;
means connected to said high frequency noise receiving means for detecting a higher level portion of said first signal where said first signal continuously exceeds a predetermined set value;
means coupled to said higher-level portion detecting means for determining a time interval during which said higher-level portion continues; and
means connected to said higher-level portion detecting means and to said time interval determining means for generating a second signal of a level corresponding to a multiplication product of a maximum value in said higher-level portion of said first signal and said time interval determined by said time interval determining means, said second signal being representative of the state of the generated sparks.
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Abstract
A spark monitor device arranged to detect a high frequency noise due to a spark generated in a current collector of a rotary electric machine and monitor a state of spark generation on the basis of the product of a peak value of the high frequency noise exceeding a given set value and a time interval during which the peak value exceeds the set value.
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Citations
8 Claims
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1. A device for monitoring sparks generated at a current collector in a rotary machine comprising:
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means for receiving high frequency noise derived from sparks generated at the current collector and producing a first signal corresponding to an amplitude modulating component detected from said high frequency noise; means connected to said high frequency noise receiving means for detecting a higher level portion of said first signal where said first signal continuously exceeds a predetermined set value; means coupled to said higher-level portion detecting means for determining a time interval during which said higher-level portion continues; and means connected to said higher-level portion detecting means and to said time interval determining means for generating a second signal of a level corresponding to a multiplication product of a maximum value in said higher-level portion of said first signal and said time interval determined by said time interval determining means, said second signal being representative of the state of the generated sparks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification