A method of measuring impedance, includes: providing an input voltage (Vin) across an impedance determination circuit comprising a first resistance (R1) and a known second resistance (R2) connected in series, the first resistance being switchable between a known first resistance and a dust build up resistance between a dust sensor and a process wall; switching the first resistance to the dust build up resistance; measuring an output voltage (Vo) across the second resistance or the dust build up resistance; and determining the dust build up resistance based on Vin, Vo, and R2.
G01N 27/02 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance
G01N 15/00 - Recherche de caractéristiques de particulesRecherche de la perméabilité, du volume des pores ou de l'aire superficielle effective de matériaux poreux
A method of measuring impedance, includes: providing an input voltage (Vin) across an impedance determination circuit comprising a first resistance (R1) and a known second resistance (R2) connected in series, the first resistance being switchable between a known first resistance and a dust build up resistance between a dust sensor and a process wall; switching the first resistance to the dust build up resistance; measuring an output voltage (Vo) across the second resistance or the dust build up resistance; and determining the dust build up resistance based on Vin, Vo, and R2.
G01N 27/04 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la résistance
3.
MONITORING SYSTEM AND METHOD FOR ENERGIZED SOLENOID VALVES MOUNTED IN CLOSE PROXIMITY TO ONE ANOTHER
A system includes a baghouse filter system comprising a plurality of fabric filters; and a valve system comprising a plurality of solenoid pilot valves each of the plurality of solenoid pilot valves including a solenoid coil, the plurality of solenoid pilot valves being operable to selectively release compressed air into the plurality of fabric filters, respectively, responsive to one or more valve control signals, the valve system further comprising a plurality of sensors associated respectively corresponding to the plurality of solenoid coils, each of the plurality of sensors being configured to output an ambient voltage when its corresponding solenoid coil is not energized, a first voltage when its corresponding solenoid coil is energized, and a second voltage when a neighboring solenoid coil is energized.
B01D 46/46 - Commande de la filtration de façon automatique
B01D 46/71 - Régénération de la substance filtrante ou des éléments filtrants à l'intérieur du filtre par action à contre-courant sur la surface filtrante, p. ex. en rinçant du côté du filtre sans gâteau avec du gaz sous pression, p. ex. de l'air pulsé
4.
MONITORING SYSTEM AND METHOD FOR ENERGIZED SOLENOID VALVES MOUNTED IN CLOSE PROXIMITY TO ONE ANOTHER
A system includes a baghouse filter system comprising a plurality of fabric filters; and a valve system comprising a plurality of solenoid pilot valves each of the plurality of solenoid pilot valves including a solenoid coil, the plurality of solenoid pilot valves being operable to selectively release compressed air into the plurality of fabric filters, respectively, responsive to one or more valve control signals, the valve system further comprising a plurality of sensors associated respectively corresponding to the plurality of solenoid coils, each of the plurality of sensors being configured to output an ambient voltage when its corresponding solenoid coil is not energized, a first voltage when its corresponding solenoid coil is energized, and a second voltage when a neighboring solenoid coil is energized.
F16K 37/00 - Moyens particuliers portés par ou sur les soupapes ou autres dispositifs d'obturation pour repérer ou enregistrer leur fonctionnement ou pour permettre de donner l'alarme
B01D 46/42 - Équipement auxiliaire ou son utilisation
B01D 46/58 - Filtres ou procédés spécialement modifiés pour la séparation de particules dispersées dans des gaz ou des vapeurs avec plusieurs éléments filtrants, caractérisés par leur disposition relative montés en parallèle
F16K 31/40 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide et dans lesquels il y a alimentation constante du moteur à fluide par le fluide provenant de la canalisation avec un organe actionné électriquement dans la décharge du moteur
A method includes collecting native dust on a collection probe having a reading probe spaced apart therefrom; generating, by a capacitance sensor comprising first and second input leads that are coupled to the collection probe and the reading probe, respectively, a signal that is representative of a capacitance between the collection probe and the reading probe; and correlating the signal with a depth of the native dust on the collection probe.
G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
G01N 27/22 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la capacité
6.
SETTLED DUST MEASUREMENT SYSTEM USING PHOTORESISTORS
A method includes projecting light to obtain a reference measurement using a first photoresistor; collecting dust on a platform during a collection time interval; and projecting light across the platform to obtain a dust measurement using the first photoresistor or a second photoresistor.
A method includes projecting light to obtain a reference measurement using a first photoresistor; collecting dust on a platform during a collection time interval; and projecting light across the platform to obtain a dust measurement using the first photoresistor or a second photoresistor.
A baghouse filter system includes a fabric filter; a control system coupled to the bag house filter system that is configured to control filtering operations of the baghouse filter system and cleaning operations of the baghouse filter system; a plurality of data collection devices that are configured to collect data associated with a plurality of operational and cleaning parameters of the baghouse filter system; and a diagnostic system that is configured to receive the data associated with the plurality of operational and cleaning parameters of the baghouse filter system independent of the control system, to determine whether a performance of the baghouse filter system is degraded based on the data associated with the plurality of operational and cleaning parameters, and to perform a plurality of targeted diagnostic analyses of the data associated with the plurality of operational and cleaning parameters, the plurality of targeted diagnostic analyses corresponding to a plurality of performance metrics of the baghouse filter system.
A baghouse filter system (100) includes a fabric filter (105a, 105b); a control system (140) coupled to the bag house filter system that is configured to control filtering operations of the baghouse filter system and cleaning operations of the baghouse filter system; a plurality of data collection devices (135) that are configured to collect data associated with a plurality of operational and cleaning parameters of the baghouse filter system; and a diagnostic system (150) that is configured to receive the data associated with the plurality of operational and cleaning parameters of the baghouse filter system independent of the control system, to determine whether a performance of the baghouse filter system is degraded based on the data associated with the plurality of operational and cleaning parameters, and to perform a plurality of targeted diagnostic analyses of the data associated with the plurality of operational and cleaning parameters, the plurality of targeted diagnostic analyses corresponding to a plurality of performance metrics of the baghouse filter system.
An system includes a fabric filter, an air supply system, a pulsing valve that is coupled to the air supply system and is configured to generate a statistical pulse of air that is directed to the fabric filter, an air flow monitor that is configured to monitor a flow of air associated with the statistical pulse of air, and a valve controller that is coupled to the air flow monitor that is configured to generate a performance signature for the pulsing valve based on the flow of air that was monitored.
An system includes a fabric filter, an air supply system, a pulsing valve that is coupled to the air supply system and is configured to generate a statistical pulse of air that is directed to the fabric filter, an air flow monitor that is configured to monitor a flow of air associated with the statistical pulse of air, and a valve controller that is coupled to the air flow monitor that is configured to generate a performance signature for the pulsing valve based on the flow of air that was monitored.
An apparatus includes a sampling probe having a first portion and a second portion. The first portion is configured to penetrate inside a wall of a duct having an inner chamber that is configured to carry a gas stream containing particulate matter therethrough. The first portion is further configured to divert a sample of the gas stream from the inner chamber of the duct to the second portion that extends from the wall of the duct opposite the inner chamber. The second portion of the sampling probe is configured to direct the sample of the gas stream in a first direction with a second direction corresponding to a direction of the gravitational force of the earth. A first ray corresponding to the first direction forms an angle ß with a second ray corresponding to the second direction. The angle ß is less than 90 degrees.
An apparatus includes a sampling probe having a first portion and a second portion. The first portion is configured to penetrate inside a wall of a duct having an inner chamber that is configured to carry a gas stream containing particulate matter therethrough. The first portion is further configured to divert a sample of the gas stream from the inner chamber of the duet to the second portion that extends from the wall of the duct opposite the inner chamber. The second portion of the sampling probe is configured to direct the sample of the gas stream in a first direction with a second direction corresponding to a direction of the gravitational force of the earth. A first ray corresponding to the first direction forms an angle β with a second ray corresponding to the second direction. The angle β is less than 90 degrees.
A system includes a device on a fabric filter having an attribute that is adjustable and a module on the fabric filter that is configured to adjust the attribute responsive to a control signal carried on a power line from which the module receives a power signal.
A method of measuring impedance includes determining a first time constant based on a known impedance and a capacitor, determining a second time constant based on a target impedance and the capacitor, and determining the target impedance based on the first time constant and the second time constant.
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
G01N 27/60 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant les variables électrostatiques
16.
Methods and circuits for measuring a high impedance element based on time constant measurements
A method of measuring impedance includes determining a first time constant based on a known impedance and a capacitor, determining a second time constant based on a target impedance and the capacitor, and determining the target impedance based on the first time constant and the second time constant.
G01R 27/26 - Mesure de l'inductance ou de la capacitanceMesure du facteur de qualité, p. ex. en utilisant la méthode par résonanceMesure de facteur de pertesMesure des constantes diélectriques
G01N 27/60 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant les variables électrostatiques
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
17.
METHODS AND CIRCUITS FOR MEASURING A HIGH IMPEDANCE ELEMENT BASED ON TIME CONSTANT MEASUREMENTS
A method of measuring impedance includes determining a first time constant based on a known impedance and a capacitor, determining a second time constant based on a target impedance and the capacitor, and determining the target impedance based on the first time constant and the second time constant.
G01N 27/60 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant les variables électrostatiques
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p. ex. constante de temps
A baghouse filter system (100) includes a fabric filter (105a, 105b); a control system (140) coupled to the bag house filter system that is configured to control filtering operations of the baghouse filter system and cleaning operations of the baghouse filter system; a plurality of data collection devices (135) that are configured to collect data associated with a plurality of operational and cleaning parameters of the baghouse filter system; and a diagnostic system (150) that is configured to receive the data associated with the plurality of operational and cleaning parameters of the baghouse filter system independent of the control system, to determine whether a performance of the baghouse filter system is degraded based on the data associated with the plurality of operational and cleaning parameters, and to perform a plurality of targeted diagnostic analyses of the data associated with the plurality of operational and cleaning parameters, the plurality of targeted diagnostic analyses corresponding to a plurality of performance metrics of the baghouse filter system.
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