Method for measuring gas concentrations
First Claim
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1. A method for measuring gas concentrations via at least one measuring head, said measuring head having a gas sensor, a data memory, a measuring head specific identifier and means for communicating with a satellite supported global positioning system, the method comprising the steps of:
- determining position data of a position of the measuring head at preset time intervals via said satellite global positioning system and measuring gas concentration values with said gas sensor at the positions of the measuring head;
comparing first position data of a previous first position of the measuring head with second position data corresponding to a current position of the measuring head;
determining a difference position value between said first position data and said second position data;
comparing said difference position value with a predetermined limit position value;
if said predetermined position value is exceeded, storing said second position data together with said measured gas concentration value, corresponding to said second position, in said data memory of said measuring head; and
, providing means for transmitting stored position data and corresponding gas concentration values together with said identifier to an evaluation unit.
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Abstract
The invention is directed to a method for measuring gas concentrations with a measuring head which is provided with a satellite-supported global positioning device. With the method, gas concentrations at various locations can be determined. The position of the measuring head is determined at predetermined time intervals and first position data of a previously measured first position is compared to second position data of a current position. When a predetermined limit value between the first position data and the second position data is exceeded; a measured value of gas concentration corresponding to the current position together with the second position data are stored in a data memory of the measuring head.
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Citations
3 Claims
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1. A method for measuring gas concentrations via at least one measuring head, said measuring head having a gas sensor, a data memory, a measuring head specific identifier and means for communicating with a satellite supported global positioning system, the method comprising the steps of:
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determining position data of a position of the measuring head at preset time intervals via said satellite global positioning system and measuring gas concentration values with said gas sensor at the positions of the measuring head;
comparing first position data of a previous first position of the measuring head with second position data corresponding to a current position of the measuring head;
determining a difference position value between said first position data and said second position data;
comparing said difference position value with a predetermined limit position value;
if said predetermined position value is exceeded, storing said second position data together with said measured gas concentration value, corresponding to said second position, in said data memory of said measuring head; and
,providing means for transmitting stored position data and corresponding gas concentration values together with said identifier to an evaluation unit. - View Dependent Claims (2)
detecting current measured values of gas concentration within said time intervals;
comparing said current measured values of gas concentration with a measured value of gas concentration last stored in said data memory;
determining a difference concentration value between the current measured value of gas concentration and said measured gas concentration value last stored in said data memory; and
,if said difference concentration value exceeds a predetermined difference concentration threshold value, storing said current measured value of gas concentration in said data memory.
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3. A method for measuring gas concentrations via at least one measuring head, said measuring head having a gas sensor, a data memory, a measuring head specific identifier and means for communicating with a satellite supported global positioning system, the method comprising the steps of:
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determining the position of said measuring head via said satellite supported global positioning system and measuring values of gas concentration corresponding to said position at preset time intervals and storing the position and the measured values of gas concentration in said data memory of said measuring head;
detecting current measured values of gas concentration within said time intervals;
comparing said current measured values of gas concentration with a measured value of gas concentration last stored in said data memory;
determining a difference concentration value between the current measured value of gas concentration and said measured gas concentration value last stored in said data memory;
if said difference concentration value exceeds a predetermined difference concentration threshold value, storing said current measured value of gas concentration in said data memory in said measuring head; and
,providing means for transmitting stored position data and corresponding gas concentration values together with said identifier to an evaluation unit.
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Specification
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Current AssigneeDraeger Sicherheitstechnik GmbH (Draegerwerk AG & Co KGaA)
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Original AssigneeDräger Sicherheitstechnik GmbH (FPS Vermögensverwaltung GmbH)
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InventorsWittich, Marko H., Kessel, Robert
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Primary Examiner(s)Williams, Hezron
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Assistant Examiner(s)Wiggins, David J.
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Application NumberUS09/456,993Time in Patent Office945 DaysField of Search73/232, 73/310.2, 73/40, 73/310.1, 340/632, 340/601US Class Current73/23.2CPC Class CodesG01N 2001/021 Correlating sampling sites ...G01N 33/0075 for multiple spatially dist...
