초록 ▼

An improved gas analyzer system (FIG. 1) and method of use for detecting and displaying the constituent gases of a respiratory gas stream, the system comprising an optical bench (109) through which a respiratory gas flows and in which measurements of the gas are taken; analog input circuits (122) fo

An improved gas analyzer system (FIG. 1) and method of use for detecting and displaying the constituent gases of a respiratory gas stream, the system comprising an optical bench (109) through which a respiratory gas flows and in which measurements of the gas are taken; analog input circuits (122) for receiving signals output from the optical bench (109); analog processing circuits (124) for processing signals output from the analog input circuits (122); display processing circuits (128) for processing the signals output from the analog processing circuits (124) and other system circuitry; pixel logic circuits/analog outputs (130) for processing signals output from the display processing circuitry (128) and providing analog output ports; a five button panel (148), an alarm-knob board (144), and a speaker driver (152) for operator interface and activation of audible and visual alarms; a CRT driver for driving the CRT; and a power supply (158) for powering the system.

대표청구항 ▼

A gas analyzer system, comprising: (a) an optical bench, further comprising, (1) a gas pathway through the optical bench, (2) a flow shaper at gas inlet to the gas pathway for changing the cross-sectional shape of the entering gas flow from a first to a second cross-sectional shape, (3) at least one

A gas analyzer system, comprising: (a) an optical bench, further comprising, (1) a gas pathway through the optical bench, (2) a flow shaper at gas inlet to the gas pathway for changing the cross-sectional shape of the entering gas flow from a first to a second cross-sectional shape, (3) at least one gas detector channel assembly disposed along the gas pathway, (4) modulating means for modulating the signals detected by the detector channel assembly, (5) circuit means associated with the detector channel assembly for separating the AC and DC components of a detected signal to correct the AC component of the signal based on changes in the DC components of the signal, (6) pressure sensing means disposed in the gas pathway for measuring the barometric pressure within the gas pathway, (7) temperature sensing means for measuring an internal temperature of the optical bench, (8) flow rate sensing means disposed in the gas pathway for measuring the flow rate of the gas stream through the gas pathway, (9) means for drawing the gas stream through the gas pathway and backflushing the pathway, (10) first circuit means for generating signals indicative of the detected gas levels of the predetermined gases by detector channel assembly, the pressure and gas flow rate within the gas pathway and the temperature within the optical bench, (11) second circuit means connected to the first circuit means for providing from memory circuit means signals representative of characterization of components of the optical bench, and (12) output circuit means connected to the first and second circuit means for providing an output signal indicative of the barometric pressure and gas flow rate within the gas pathway, the temperature within the optical bench, the gas level of the predetermined gas detected by the detector channel assembly, and signal representative of the characterization of the components of the optical bench; (b) analog signal processing circuitry further comprising, (1) an input circuit for receiving signals output from the optical bench, processing these signals and converting them from analog to digital signals, (2) a digital signal processing circuit, further including a microprocessor and memory circuits for receiving the digital outputs from the input circuit and correcting the signals indicative of the partial gas pressure for temperature, changes in detector sensitivity, collision broadening, cross correction, barometric pressure and characterization of the optical bench components, and (3) output circuit for outputting at least the corrected signals for the partial gas pressure to display processing circuitry; (c) a display processing circuitry further including at least a microprocessor and memory circuits for receiving the digital signals output from the analog signal processing circuitry and processing the signals to provide outputs for controlling display screen processing circuitry, for digital and analog output means and for alarm means; (d) the display screen processing circuitry with means connected to display processing circuitry for generating signals for driving a display means; and (e) power supply means for powering the system.