Apparatus, system, and method for improved power utilization in a gas chromatography sensor
An apparatus, system, and method are disclosed for broad spectrum chemical detection. The method includes detecting an ambient temperature and setting a target temperature based on the ambient temperature. The target temperature is a temperature greater than the ambient temperature. The method further includes determining elution data for the target temperature, either by selecting a target temperature at which elution data is available, or by interpolating between available sets of elution data. The method includes setting a preferred target temperature when an external power source is available, when faster sensor response is desired, and when higher resolution data is desired. The method further includes controlling the temperature of gas chromatography (GC) columns within a GC sensor to the target temperature.
1. A method for improved power utilization in a gas chromatography sensor, the method comprising:
interpreting an ambient temperature;
selecting a target temperature in response to the ambient temperature based on a plurality of temperature values, each temperature value corresponding to a set of elution data; and
heating at least one gas chromatography (GC) column to the target temperature.
2. The method of claim 1 , the method further comprising determining whether a power source is one of internal and external, and wherein selecting the target temperature further comprises selecting a preferred target temperature if the power source is external.
3. The method of claim 1 , wherein selecting the target temperature further comprises selecting a preferred target temperature in response to a specified chemical detection event.
4. The method of claim 1 , the method further comprising selecting one of the plurality of temperature values that is higher than the ambient temperature.
5. The method of claim 1 , the method further comprising selecting one of the plurality of temperature values that is higher than the ambient temperature plus an offset value.
6. The method of claim 1 , the method further comprising selecting a target temperature equal to the ambient temperature plus an offset value.
7. The method of claim 6 , the method further comprising calculating a supplemental elution data set by interpolating between a first elution data set corresponding to a temperature value above the target temperature and a second elution data set corresponding to a temperature value below the target temperature.
8. The method of claim 7 , wherein interpolating between a first elution data set corresponding to a temperature value above the target temperature and a second elution data set corresponding to a temperature value below the target temperature comprises applying fundamental mass diffusion equations to calculate the supplemental elution data.
9. An apparatus for improved power utilization in a gas chromatography sensor, the apparatus comprising:
an ambient conditions module configured to interpret an ambient temperature;
a stored conditions module configured to store a plurality of sets of elution data, each set of elution data corresponding to a temperature value;
a target temperature module configured to select a target temperature in response to the ambient temperature based on the temperature values corresponding to each set of elution data;
a temperature control module configured to heat at least one gas chromatography (GC) column to the target temperature; and
a power selection module configured to determine whether a power source is one of internal and external, and wherein the target temperature module is further configured to select a preferred target temperature as the target temperature when the power source is external.
10. The apparatus of claim 9 , wherein the target temperature module is further configured to select a preferred target temperature as the target temperature in response to a specified chemical detection event.
11. The apparatus of claim 9 , wherein the temperature values corresponding to each set of elution data comprise a set of temperature values, wherein the target temperature module is further configured to select a temperature value higher than the ambient temperature from the set of temperature values as the target temperature.
12. The apparatus of claim 11 , wherein the target temperature module is further configured to select the lowest available temperature value from the set of temperature values as the target temperature.
13. The apparatus of claim 11 , wherein the target temperature module is further configured to select a temperature value higher than the ambient temperature plus an offset value from the set of temperature values as the target temperature.
14. The apparatus of claim 13 , wherein the target temperature module is further configured to select the lowest available temperature value from the set of temperature values as the target temperature.
15. The apparatus of claim 9 , wherein the target temperature module is further configured to select a target temperature equal to an offset value higher than the ambient temperature, the apparatus further comprising a supplemental elution data module configured to determine a supplemental elution data set by interpolating between a set of elution data corresponding to a first temperature value, and a set of elution data corresponding to a second temperature value, wherein the first temperature value is a temperature value below the target temperature, and wherein the second temperature value is a temperature value above the target temperature.
16. A system for improved power utilization in a gas chromatography sensor, the system comprising:
a gas chromatography (GC) sensor having at least one GC column;
a controller comprising:
an ambient conditions module configured to detect an ambient temperature;
a stored conditions module configured to store a plurality of sets of elution data, each set of elution data corresponding to a temperature value;
a target temperature module configured to select a target temperature in response to the ambient temperature based on the temperature values corresponding to each set of elution data; and
a temperature control module configured to heat at least one gas chromatography (GC) column to the target temperature; and
a power selection module configured to determine whether a power source is one of internal and external, and wherein the target temperature module is further configured to select a preferred target temperature as the target temperature when the power source is external.
17. The system of claim 16 , wherein the at least one GC column comprises a torsion-spring tube.
18. The system of claim 17 , further comprising an insulated resistor disposed within each torsion-spring tube, wherein the temperature control module heats each GC column by passing an electric current through the insulated resistor disposed within each torsion-spring tube.
19. The system of claim 16 , wherein the target temperature module is further configured to select a target temperature equal to an offset value higher than the ambient temperature, the apparatus further comprising a supplemental elution data module configured to determine a supplemental elution data set by interpolating between a set of elution data corresponding to a first temperature value, and a set of elution data corresponding to a second temperature value, wherein the first temperature value is a temperature value below the target temperature, and wherein the second temperature value is a temperature value above the target temperature.