Browse Prior Art Database

Exhaust Flow Monitoring System

IP.com Disclosure Number: IPCOM000102928D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 38K

Publishing Venue

IBM

Related People

Babel, M: AUTHOR [+3]

Abstract

An average flow detection device mounted in an exhaust pipe is connected to a capacitive manometer to generate an analogue electrical signal proportional to average flow. Analogue to digital circuitry converts the signal to drive a digital visual display of relative gas velocity in the exhaust pipe. An adjustable alarm setpoint is provided. The analogue signal is accessible through a plug for charting flow as a function of time or for flow calibration. This monitoring system is found especially useful in toxic gas exhaust piping.

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Exhaust Flow Monitoring System

      An average flow detection device mounted in an exhaust pipe is
connected to a capacitive manometer to generate an analogue
electrical signal proportional to average flow. Analogue to digital
circuitry converts the signal to drive a digital visual display of
relative gas velocity in the exhaust pipe.  An adjustable alarm
setpoint is provided. The analogue signal is accessible through a
plug for charting flow as a function of time or for flow calibration.
This monitoring system is found especially useful in toxic gas
exhaust piping.

      A commercially available flow averaging detector 2 is mounted
in exhaust pipe 4 and connected to capacitive manometer 6 which
converts differential pressure in detector 2 to an analogue
electrical signal.  The analogue signal is sent to an analogue to
digital converter in output box 8. Digital output of the converter is
used to drive visual display 10 which includes a setpoint indicator
12.  A plug 14 on the front of box 8 is used in calibration
procedures to bring analogue signal out to a chart recorder if
desired and to carry an alarm signal out to a remote location, if
needed.

      Disclosed anonymously.