Sensing device and sensing method
First Claim
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1. A sensing device for continuously or intermittently quantifying a concentration of an analyte, comprising:
- a sensor sequentially acquiring a measurement signal correlated with the concentration of the analyte;
a plurality of filters that perform filter processing on a time sequence of the measurement signal acquired by sensor in a frequency domain, the plurality of filters to eliminate noise components from the measurement signal, the plurality of filters at least comprising;
a first filter;
a second filter;
a filter processing unit, wherein the filter processing unit receives a switch variable from a switch variable computation unit, the filter processing unit comprising;
a switch, electrically coupled between the sensor and the plurality of filters;
wherein the filter processing unit compares the switch variable to a predetermined threshold;
wherein, if the switch variable is greater than the predetermined threshold, the filter processing unit signals the switch to route the measurement signal to the first filter;
wherein, if the switch variable is less than the predetermined threshold, the filter processing unit signals the switch to route the measurement signal to the second filter.
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Abstract
The present invention relates to a sensing device and a sensing method for continuously or intermittently quantifying a concentration of analyte. A measurement signal correlated with a concentration of analyte is sequentially acquired by use of a sensor (12). A filter processing is performed on a time sequence of the measurement signal acquired by the sensor (12) in a frequency domain via one type of filter among a plurality of types of filters (48, 49, 84). One type of filter used in the filter processing is switched depending on the amount of temporal change of the measurement signal.
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Citations
20 Claims
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1. A sensing device for continuously or intermittently quantifying a concentration of an analyte, comprising:
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a sensor sequentially acquiring a measurement signal correlated with the concentration of the analyte; a plurality of filters that perform filter processing on a time sequence of the measurement signal acquired by sensor in a frequency domain, the plurality of filters to eliminate noise components from the measurement signal, the plurality of filters at least comprising; a first filter; a second filter; a filter processing unit, wherein the filter processing unit receives a switch variable from a switch variable computation unit, the filter processing unit comprising; a switch, electrically coupled between the sensor and the plurality of filters; wherein the filter processing unit compares the switch variable to a predetermined threshold; wherein, if the switch variable is greater than the predetermined threshold, the filter processing unit signals the switch to route the measurement signal to the first filter; wherein, if the switch variable is less than the predetermined threshold, the filter processing unit signals the switch to route the measurement signal to the second filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sensing method for continuously or intermittently quantifying a concentration of an analyte, comprising:
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sequentially acquiring, by a sensor, a measurement signal correlated with the concentration of the analyte; determining a switch variable that indicates an amount of temporal change of the measurement signal; comparing the switch variable to a predetermined threshold; if the switch variable is greater than the predetermined threshold, switching, by a switch, the measurement signal to a first filter to perform filtering on a time sequence of the measurement signal acquired by the sensor in a frequency domain, wherein the first filter removes noise components from the measurement signal; and if the switch variable is less than the predetermined threshold, switching, by the switch;
the measurement signal to a second filter to perform filtering on a time sequence of the measurement signal acquired by the sensor in a frequency domain, wherein the first filter removes noise components from the measurement signal, wherein the first and second filters are different. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A non-transitory computer readable medium having instructions for performing a method for continuously or intermittently quantifying a concentration of an analyte, the instructions comprising:
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instructions for sequentially acquiring, by a sensor, a measurement signal correlated with the concentration of the analyte; instructions for determining a switch variable that indicates an amount of temporal change of the measurement signal; instructions for comparing the switch variable to a predetermined threshold; if the switch variable is greater than the predetermined threshold, instructions for switching, by a switch, the measurement signal to a first filter to perform filtering on a time sequence of the measurement signal acquired by the sensor in a frequency domain, wherein the first filter removes noise components from the measurement signal; and if the switch variable is less than the predetermined threshold, instructions for switching, by the switch, the measurement signal to a second filter to perform filtering on a time sequence of the measurement signal acquired by the sensor in a frequency domain, wherein the first filter removes noise components from the measurement signal, wherein the first and second filters are different. - View Dependent Claims (19, 20)
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Specification