Interference Detector and Methods
First Claim
Patent Images
1. An interference detector for detecting electro-magnetic interference corrupting a signal from a breath alcohol sensor, the detector comprising a processor programmed to:
- receive the signal from the breath alcohol sensor;
differentiate the signal to generate a differentiated signal;
compare the differentiated signal to a predefined threshold for a time rate of change range; and
determine that an interference corrupting event is detected if the time rate of change is outside the respective predetermined range.
1 Assignment
0 Petitions
Accused Products
Abstract
Interference detector and methods 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.
-
Citations
14 Claims
-
1. An interference detector for detecting electro-magnetic interference corrupting a signal from a breath alcohol sensor, the detector comprising a processor programmed to:
-
receive the signal from the breath alcohol sensor; differentiate the signal to generate a differentiated signal; compare the differentiated signal to a predefined threshold for a time rate of change range; and determine that an interference corrupting event is detected if the time rate of change is outside the respective predetermined range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An interference detector for detecting electro-magnetic interference corrupting a signal received from a breath alcohol sensor including a fuel cell, the detector comprising a processor programmed to:
-
receive the signal from the breath alcohol sensor; transform the signal from a time domain signal to a frequency domain signal; and process the frequency domain signal to determine whether any frequency component present is outside a predefined range; and determine that an interference corrupting event is detected if the frequency component present is outside the predefined range. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification