METHOD, CONTROL UNIT, AND DEVICE FOR DETECTING A GASEOUS SUBSTANCE IN A GAS MIXTURE
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Abstract
A method for detecting a gaseous substance in a gas-mixture, a first measuring-variable which represents a first chemical and/or physical parameter of the gas-mixture being acquired, at least one second measuring-variable which represents a second chemical and/or physical parameter of the gas-mixture that differs from the first parameter being acquired, and a starting-measuring-instant, corresponding to the starting-instant, of the first parameter is specified when an amount of a time-derivative of the first measuring-variable exceeds a first predefined threshold-value and an amount of a time-derivative of the second measuring-variable exceeds a second predefined threshold-value, and at least one further first measuring-variable is acquired, an end instant is specified when the at least one further first measuring-variable corresponds to the starting measuring-variable, and an output signal is generated when the amount of a difference between the end instant and the starting instant is greater than a predefined minimum time span.
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Citations
19 Claims
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1-9. -9. (canceled)
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10. A method for detecting a gaseous substance and/or ethanol, in a gas mixture with the aid of a gas sensor, the method comprising:
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performing the following; a first acquisition, in which at least one first measuring variable which represents a first chemical and/or physical parameter of the gas mixture, in particular a concentration of ethanol, is acquired using a first sensor element; a second acquisition, in which at least one second measuring variable which represents a second chemical and/or physical parameter of the gas mixture that differs from the first chemical and/or physical parameter, in particular a temperature, a pressure or a humidity, is acquired using a second sensor element, a first comparison, in which a comparison takes place as to whether an amount of a time derivative of the first measuring variable exceeds a first predefined threshold value and whether an amount of a time derivative of the second measuring variable exceeds a second predefined threshold value, a first specification, in which a starting instant and a starting measuring variable, corresponding to the starting instant, of the first chemical and/or physical parameter is specified when a comparison is positive, a third acquisition, in which at least one further first measuring variable is acquired, a second comparison, in which a comparison takes place as to whether the at least one further first measuring variable corresponds to the starting measuring variable; a second specification, in which an end instant is specified when the second comparison is positive; a third comparison, in which a comparison takes place as to whether the amount of a difference between the end instant and the starting instant is greater than a predefined minimum time span, and a signal-generation, in which an output signal is generated when the third comparison is positive. - View Dependent Claims (11, 12, 13)
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14. A control unit for detecting a gaseous substance and/or ethanol, in a gas mixture with the aid of a gas sensor, comprising:
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a memory unit; and an arithmetic unit configured to perform the following; in a first acquisition, to acquire at least one first measuring variable which represents a first chemical and/or physical parameter of the gas mixture, in particular a concentration of ethanol, using a first sensor element, and in a second acquisition, to acquire at least one second measuring variable which represents a second chemical and/or physical parameter of the gas mixture that differs from the first chemical and/or physical parameter, in particular a temperature, a pressure or a humidity, using a second sensor element, in a first comparison, to carry out a comparison as to whether an amount of a time derivative of the first measuring variable exceeds a first predefined threshold value and whether an amount of a time derivative of the second measuring variable exceeds a second predefined threshold value, in a first specification, to specify a starting instant and a starting measuring variable, corresponding to the starting instant, of the first chemical and/or physical parameter when the comparison is positive, in a third acquisition, to detect at least one further first measuring variable, in a second comparison, to compare whether the at least one further first measuring variable corresponds to the starting measuring variable, in a second specification, to specify an end instant when the second comparison is positive, in a third comparison, to compare whether the amount of a difference between the end instant and the starting instant is greater than a predefined minimum time span, and in a signal-generation, to generate an output signal when the third comparison is positive. - View Dependent Claims (15, 16, 17, 19)
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18. A gas sensor to detect a gaseous substance and/or ethanol, in a gas mixture, comprising:
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a control unit; a first sensor element; and a second sensor element; wherein the control unit includes; a memory unit; and an arithmetic unit configured to perform the following; in a first acquisition, to acquire at least one first measuring variable which represents a first chemical and/or physical parameter of the gas mixture, in particular a concentration of ethanol, using the first sensor element, and in a second acquisition, to acquire at least one second measuring variable which represents a second chemical and/or physical parameter of the gas mixture that differs from the first chemical and/or physical parameter, in particular a temperature, a pressure or a humidity, using the second sensor element, in a first comparison, to carry out a comparison as to whether an amount of a time derivative of the first measuring variable exceeds a first predefined threshold value and whether an amount of a time derivative of the second measuring variable exceeds a second predefined threshold value, in a first specification, to specify a starting instant and a starting measuring variable, corresponding to the starting instant, of the first chemical and/or physical parameter when the comparison is positive, in a third acquisition, to detect at least one further first measuring variable, in a second comparison, to compare whether the at least one further first measuring variable corresponds to the starting measuring variable, in a second specification, to specify an end instant when the second comparison is positive, in a third comparison, to compare whether the amount of a difference between the end instant and the starting instant is greater than a predefined minimum time span, and in a signal-generation, to generate an output signal when the third comparison is positive.
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Specification