MULTIPLE-COMPONENT IR-RANGE GAS ANALYZER Russian patent published in 2006 - IPC G01N21/35 

FIELD: measuring technique.

SUBSTANCE: IR gas analyzer can be used for measuring concentrations of gases in multiple-component mixtures. Multiple-component IR-range gas analyzer has electromagnet radiation source made in for light-emitting diode array, which irradiates reference and working waves. Light-emitting diode array is connected with excitation current pulse oscillator which is synchronized by microprocessor. Radiation of reference and working waves first enters additional pyroelectricity-type photoreceiver, and then it passes through gas dish and enters basic pyroelectricity-type photoreceiver. Outputs of any pyroelectric photoreceiver are connected with signal processing unit through pre-amplifiers and sync detectors. Signal processing unit has analog-to-digital converter. Output of analog-to-digital converter is connected with input of microprocessor. One output of microprocessor is connected with digital-to-analog converter, which is connected with light-emitting diode array's current pulse forming circuit to adjust intensity of radiation of light-emitting diodes of array according to preset algorithm. Three other rest outputs of microprocessor are connected with inputs of light-emitting diodes' current pulse forming circuit to control operation of light-emitting diodes according to certain sequence.

EFFECT: improved precision of measurement.

5 dwg