CONTINUOUS ANALYZING DEVICE

• US 3,691,364 A
• Filed: 03/16/1970
• Issued: 09/12/1972
• Est. Priority Date: 03/20/1969
• Status: Expired due to Term

• Current Assignee: Katsuo Abe, Tatsuo Baba
• Original Assignee: Katsuo Abe, Tatsuo Baba
• Inventors: Baba, Tatsuo, Abe, Katsuo
• Primary Examiner(s): Malcolm A. Morrison
• Assistant Examiner(s): Jerry Smith
• Application Number:
  US05/019,779
• Time in Patent Office: 911 Days
• Field of Search: 235/151.13,151.35,150.31,181 73/23.1,421.5R 55/67,386
• US Class Current: 702/27
• CPC Class Codes: G06G 7/1928 for forming correlation integrals; for forming convolution integrals G06G7/195, G06G7/1907 and G06G7/1914 take precedence

Abstract

Continuous analysis is performed by continuously injecting a plurality of samples according to a pulsed pseudo-random binary signal, and by computing a cross-correlation function of the pseudo-random binary signal or its linear function and a detector output whereby to detect, the cross-correlation as the response corresponding to the result of measurement.

Claims

1. A continuous analyzing device comprising:

a. a signal generator means for producing a pulse signal having a predetermined repetition period ( Delta ) and a predetermined width ( delta );

a plurality of pseudo-random binary signals each having a predetermined minimum pulse width ( Delta ), a predetermined repetition period (N Delta ) and a predetermined phase difference from each other for a correlation function; and

a plurality of pulsed pseudo-random binary signals, each having a predetermined pulse width ( delta ) which is smaller than said pulse width ( Delta ) of said pseudo-random binary signals, each of said pulsed pseudo-random binary signals being obtained by a conjunction of a predetermined succession of one of said pseudo-random binary signals and said pulse signal, for sample injection;

b. a sample injector connected into conduits carrying a carrier gas at a constant flow rate, said sample injector having at least one sampling valve for continuously injecting gas samples into said carrier gas;

c. a valve drive means operable for driving said sampling valves to inject said samples into said carrier gas in accordance with said pulsed pseudo-random binary signals;

d. a column means having an input end to receive said carrier gas and said samples for separating various components of said samples included in said carrier gas;

e. a detector means connected to the output end of said column means for obtaining a composite signal corresponding to said various components of said samples, which are injected in accordance with said pulsed pseudo-random binary signals; and

f. a correlator means coupled to said signal generator means and said detector means for computing a cross-correlation function between said pseudo-random binary signals and said composite signal detected by said detector means, said composite signal being obtained in accordance with said pulsed pseudo-random binary signals.

2. The analyzing device according to claim 1 wherein said sampling valves are connected in series.

3. The analyzing devices according to claim 1 wherein said sampling valves are connected in parallel.