Gas sensors

The present invention mainly relates to a gas sensor, concretely speaking, the present invention provides an opto-acoustic detector which comprises: a measuring system for measuring opto-acoustic excitation entering into the opto-acoustic detector for analyzing gas, a reference system for measuring...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MOECKLI MARC ANDREAS, BACHMANN PHILIPP ALBERT, TRACHSEL HANS, BOEGLI URS FREDERICH, BLATNICA LEN JOHN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY COMPOSITIONS OR TEST PAPERS THEREFOR COMPOSITIONS THEREOF CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES CULTURE MEDIA ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE HUMAN NECESSITIES HYGIENE INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS MEDICAL OR VETERINARY SCIENCE METALLURGY MICROBIOLOGY MICROORGANISMS OR ENZYMES MUTATION OR GENETIC ENGINEERING ORGANIC CHEMISTRY PEPTIDES PHYSICS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PROCESSES OF PREPARING SUCH COMPOSITIONS PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS SPIRITS TESTING VINEGAR WINE
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Beschreibung
Zusammenfassung:	The present invention mainly relates to a gas sensor, concretely speaking, the present invention provides an opto-acoustic detector which comprises: a measuring system for measuring opto-acoustic excitation entering into the opto-acoustic detector for analyzing gas, a reference system for measuring effect of the pressure wave in the environment, and an electronic system for combining the output of the reference system and the output of the measuring system so as to offset the noises generated by the pressure wave in the environment and generating opto-acoustic detector outputting signal. The present invention also provides an opto-acoustic detector, which comprises: a measuring unit, a reference unit and a pressure gradient microphone coupling between the two units, the pressure gradient microphones used for measuring the pressure difference between the measuring unit and the reference unit, so as to reduce the noises from external pressure in the opto-acoustic sensor output signals.