Measuring and testing – Sampler – sample handling – etc. – Automatic control
Patent
1995-09-25
1997-04-01
Raevis, Robert
Measuring and testing
Sampler, sample handling, etc.
Automatic control
73116, G01N 124
Patent
active
056168705
ABSTRACT:
A system and method periodically sample a fluid stream in a conduit for undergoing analysis thereof. A sampling tube having a probe is joined to the conduit for removing samples from the stream flowing therethrough. An analyzer is joined to the sampling tube for analyzing the removed samples. A solenoid valve is disposed in the tube for controlling flow of the samples to the analyzer. A dynamic pressure transducer is joined to the conduit so that a specific dynamic pressure reference frequency of the stream in the conduit may be locked-on to and used for periodically switching the solenoid valve open and closed for intermittently removing stream samples from the conduit at the reference frequency for channeling to the analyzer periodic stream samples at a sampling frequency corresponding to the reference frequency. In a preferred embodiment, the solenoid valve is switched open at a specific sampling phase in the sampling frequency, which phase may be indexed for obtaining different periodic samples at the sampling frequency for measuring periodic and short duration concentration fluctuations.
REFERENCES:
patent: 4589292 (1986-05-01), Delhaye et al.
patent: 5010727 (1991-04-01), Cox
patent: 5321972 (1995-06-01), Stock
patent: 5456124 (1995-10-01), Colvin
General Valve Corpation, "Iota One--Operating Manual and Set-up Instructions," pp.:1-12, Commercially available product..
Bowen John H.
Lovett Jeffery A.
General Electric Company
Raevis Robert
Webb II Paul R.
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