Interference detection systems and methods
First Claim
1. Apparatus for determining whether a signal representative of breath alcohol generated by a sensor has been corrupted by interference, said apparatus comprising a processor that processes the signal from the sensor to determine whether the signal generated by the sensor has been corrupted by interference, said processor programmed to determine whether the sensor signal has at least one of a time characteristic and a frequency characteristic outside respective predefined ranges.
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Accused Products
Abstract
Methods and systems for detecting interference in a signal are described. More specifically, in one aspect, a method for detecting interference in a signal is provided. The method comprises determining whether the signal has at least one of a time and a frequency characteristic that is outside a predefined range, and determining that an interference event has been detected if the signal has at least one of such characteristics.
25 Citations
29 Claims
- 1. Apparatus for determining whether a signal representative of breath alcohol generated by a sensor has been corrupted by interference, said apparatus comprising a processor that processes the signal from the sensor to determine whether the signal generated by the sensor has been corrupted by interference, said processor programmed to determine whether the sensor signal has at least one of a time characteristic and a frequency characteristic outside respective predefined ranges.
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14. A method for detecting interference in a signal that is representative of breath alcohol content, said method comprising:
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determining whether the signal has at least one of a time and a frequency characteristic outside a predefined range; and
determining that an interference event has been detected if the signal has at least one of such characteristics. - View Dependent Claims (15, 16, 17, 18, 19, 20, 25, 26)
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21. An interference detector for detecting interference in a signal, said detector comprising a processor programmed to:
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process a signal representative of breath alcohol content to determine whether the signal has been corrupted by interference; and
determine whether the signal has at least one of a time characteristic and a frequency characteristic outside respective predefined ranges. - View Dependent Claims (22, 23, 24, 27, 28, 29)
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Specification