Class 73/23.23 - Baseline drift correction circuitry

Subclass of Class 73 - Measuring and testing
Definition: Subject matter which includes circuitry for correcting a
No. of patents: 30
Last issue date: 04/08/2008

Number	Title	Issue Date
7356446	Method and apparatus for analyzing multi-channel chromatogram A method for analyzing a multi-channel chromatogram is realized for accurately resolving overlapping peaks on a multi-channel chromatogram to permit analysis of the composition of a sample. First, components of overlapping peaks are specified. A data matrix Dij is d...	04/08/2008
7110886	Method and apparatus for analyzing multi-channel chromatogram A method for analyzing a multi-channel chromatogram is realized for accurately resolving overlapping peaks on a multi-channel chromatogram to permit analysis of the composition of a sample. First, components of overlapping peaks are specified. A data matrix Dij is d...	09/19/2006
7041256	Poison resistant combustible gas sensors and method for warning of poisoning A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner layer coated on the electric heating element and containing a precious m...	05/09/2006
7007542	Method of warning of poisoning in poison resistant combustible gas sensors A poison resistant combustible gas sensing element, a method for its production and a method for determining poisoning of the element. The element includes an electric heating element, an inner layer coated on the electric heating element and containing a precious m...	03/07/2006
6934638	Method and apparatus for analyzing multi-channel chromatogram A method for analyzing a multichannel chromatogram is realized for accurately resolving overlapping peaks on a multichannel chromatogram to permit analysis of the composition of a sample. ...	08/23/2005
6856917	Data processing apparatus for chromatograph A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the base line whic...	02/15/2005
6675107	Data processing apparatus for chromatograph A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the bas...	01/06/2004
6529836	Data processing apparatus for chromatograph A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the bas...	03/04/2003
6418778	Gas detector equipped with feedback function A gas detector equipped with a sensor-monitoring feedback function includes a casing and a base board housing a circuit board therein. The circuit board supports a plurality of electronic elements, including a processor unit consisting of a micro control ...	07/16/2002
6408684	Detection device for apparatus for analysis A detection device for an apparatus for carrying out analysis such as a chromatograph includes not only a detector for outputting detection signals but also a stabilization judging unit for measuring drift and noise of these detection signals over time an...	06/25/2002
6314374	Data processing apparatus for chromatograph A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the bas...	11/06/2001
6237392	Inspection apparatus for gas detectors An inspection apparatus for gas detectors is disclosed which comprises an open-feasibly air-tight testing reservoir in which gas detectors to be tested can be positioned, an air-tight dispensing reservoir for mixing the gas to be tested, a vacuum device f...	05/29/2001
6112161	Method, apparatus, and article of manufacture for enhanced intergration of signals A method, apparatus, and article of manufacture for enhanced integration of signals, such as those generated by chromatographs. In one embodiment an approximate baseline used for integration of a signal is improved to reduce error. Alternate embodiments f...	08/29/2000
6076047	Data processing apparatus for chromatograph A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the bas...	06/13/2000
5592402	Method for interpreting complex data and detecting abnormal instrumentor process behavior An improved method is provided for determining when a set of multivariate data (such as a chromatogram or a spectrum) is an outlier. The method involves using a procedure such as Principal Component Analysis to create a model describing a calibration set ...	01/07/1997
5347474	Self-calibration of an NDIR gas sensor Some cyclic variables include within each cycle a value that can be determined extrinsically. In such case, the sensed value may differ from the known value by an amount that is a combination of long-term drift of the sensor and random measuring error. Th...	09/13/1994
5311444	Absorbance analyzer and data processing method for chromatograph A measuring part measures the absorbance spectrum of an effluent fluid sample from a chromatograph in a constant cycle, and a base line calculating part calculates a base line including absorbance values on both ends of a designated wave number range with...	05/10/1994
5121443	Neural net system for analyzing chromatographic peaks A two-step process for characterization of peaks in a chromatogram is disclosed. Firstly, data corresponding to each peak or pair of peaks in the chromatogram is identified. A unique filter apparatus locates extrema of the curvature of the chromatographic...	06/09/1992
5048321	Method of discriminating breath contaminants and apparatus therefor A method of discriminating alcohols different from ethanol in breath samples includes sampling voltages from a fuel cell at a rapid rate to establish a curve rising, upon introduction of a sample containing a known amount of ethanol without interferants, ...	09/17/1991
5040126	Method for predicting steady-state conditions To stabilize flow rate in a single-stroke, syringe-type high pressure pump to a constant value after turn-on, a control system; (1) in one embodiment, senses the maximum rate of change of pressure, detects a pressure when the rate of change is two-thirds ...	08/13/1991
4941101	Method for analyzing chromatograms A method for resolving severely overlapped chromatogram peaks using Jansson's iterative deconvolution method is disclosed. The method requires only a knowledge of the impulse response function of the chromatographic apparatus and maximum peak height. A hi...	07/10/1990
4927532	Device for the compensation of the baseline drift of a chromatographic separating column The baseline drift occurring during a temperature or flow rate program in a chromatographic separating column is compensated for by signals from a function generator. The function generator supplies a computed baseline signal which is a representation of ...	05/22/1990
4875169	Method for improving the limit of detection in a data signal A method for improving the limit of detection for a data set in which experimental noise is uncorrelated along a given abscissa and an analytical signal is correlated to the abscissa, the steps comprising collecting the data set, converting the data set i...	10/17/1989
4837726	Quantitation of chromatographic information A process and apparatus for quantitating chromatographic information uses a discrete, linear, translation invariant filter function aN଱, where N is a measure of the filter function width and ଱ is a parameter whose value d...	06/06/1989
4802102	Baseline correction for chromatography Peak detection for a chromatogram is improved by removing systematic errors in the chromatogram using orthogonal subtraction. Orthogonal substraction involves subtracting from each spectrum in the chromatogram its expression in a spectral space representi...	01/31/1989
4355533	Gas measurement and analysis system A gas measurement and analysis system having a gas chromatograph which converts a gas mixture from a source to a time varying continuous signal. This signal is sampled and converted to digital form by an analog to digital converter which provides a stream...	10/26/1982
4316381	Modulated detector The continuous flow of sample fluid, e.g., the elution from the column of a chromatograph, is modulated with the aid of a storage volume such that the flow of sample fluid into the fluid input of a detector varies between maximum and minimum values at a g...	02/23/1982
4307453	Sloping baseline compensation for a chromatographic analyzer A method and apparatus is disclosed for correcting errors in a chromatographic analysis wherein the trailing edge of a strong peak interferes with the integration of the trailing peak which follows the strong peak. In one embodiment of the invention two f...	12/22/1981
4170893	Sloping baseline compensation for a chromatographic analyzer A method and apparatus is disclosed for correcting errors in a chromatographic analysis wherein the trailing edge of a strong peak interferes with the integration of the trailing peak which follows the strong peak. In one embodiment of the invention two f...	10/16/1979
4006624	Pneumatic chromatograph An all-pneumatic process chromatograph having a pneumatically-actuated sample-injection valve, an orifice connected in the column output line to develop a pressure signal corresponding to fluid density, a pneumatic amplifier for strengthening the pressure...	02/08/1977

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Class 73/23.23 - Baseline drift correction circuitry