Modulated composition flame photometer专利检索-正弦波滤波器变压器和转换设备专利检索查询-专利查询网

Modulated composition flame photometer

阅读：472发布：2023-05-05

专利汇可以提供Modulated composition flame photometer专利检索，专利查询，专利分析的服务。并且This invention relates to an improved flame photometer. The gas to be analyzed is modulated in composition by means of a reference gas devoid of the component whose concentration is sought. This reaction is accomplished with a modulator cavity partitioned by a flexible membrane having a ferrite magnet or other magnetic material attached thereto. An electromagnet imparts a sinusoidal displacement to said ferrite magnet producing peak tidal flows of said sample gas and said reference gas alternately to a burner. An optical filter passes specific spectral components of the resultant luminosity to a photomultiplier which converts the light flux to an electrical signal. This resultant signal is electrically correlated with the modulating drive signal to obtain the amplitude of the periodic component of flame intensity occurring at the modulating frequency.，下面是Modulated composition flame photometer专利的具体信息内容。

权利要求

1. An improved flame photometer of the type wherein there is provided a flame chamber containing a burner for burning a stream of sample gas to be analyzed, an optical filter for passing specific spectral components of the luminosity and a photomultiplier for converting light energy to an electrical signal wherein the improvement comprises: a source of a reference gas; means for composition modulating said sample gas stream with said reference gas, said modulating means comprising: a cavity having a first input coupled to said source of reference gas, a second input for receiving said sample gas and first and second outputs for delivering said reference gas and said sample gas to said burner; a flexible diaphragm partitioning said cavity and separating said first input and said first output from said second input and second output; and means for imparting to said diaphragm a sinusoidal displacement to produce peak tidal flows of said sample gas and said reference gas to said burner equal to the reference gas and sample gas inflow rates; and means for measuring the amplitude of the periodic electrical signal corresponding to flame intensity variation occurring at the modulating frequency.

2. An improved flame photometer according to claim 1 wherein said imparting means includes: a ferrite magnet mounted in the center of said diaphragm; an electromagnet located outside said cavity for displacing said ferrite magnet; and means for controlling said electromagnet to impart sinusoidal displacement to said ferrite magnet.

3. An improved flame photometer according to claim 2 wherein said measuring means includes: a synchronous detector having a first input coupled to the output of said photomultiplier and having a second input coupled to the output of said means for controlling.

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Modulated composition flame photometer

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