Patents by Inventor Kentaro Hazama
Kentaro Hazama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10859491Abstract: A spectroscopic analysis apparatus includes a laser light source that emits laser light, of which wavelength changes, toward a reflector inside a probe, the probe being configured to be disposed in a flow passage of a measurement target fluid, a light receiver that receives the laser light reflected by the reflector, and a controller that analyzes the measurement target fluid using a result of reception acquired by the light receiver and controlling the laser light source. The controller controls the laser light source to perform at least one scan of the laser light, the controller controlling the laser light source such that a scanning time of the laser light is equal to or shorter than a light-receivable time of the laser, the scanning time being a time to scan the laser light emitted from the laser light source in a certain wavelength range, the light-receivable time being a time in which the laser light reflected by the reflector can be received by the light receiver.Type: GrantFiled: February 14, 2019Date of Patent: December 8, 2020Assignee: YOKOGAWA ELECTRIC CORPORATIONInventors: Kentaro Hazama, Junichi Matsuo, Nobuko Takekawa, Yuya Sugiyama
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Publication number: 20190257749Abstract: A spectroscopic analysis apparatus includes a laser light source that emits laser light, of which wavelength changes, toward a reflector inside a probe, the probe being configured to be disposed in a flow passage of a measurement target fluid, a light receiver that receives the laser light reflected by the reflector, and a controller that analyzes the measurement target fluid using a result of reception acquired by the light receiver and controlling the laser light source. The controller controls the laser light source to perform at least one scan of the laser light, the controller controlling the laser light source such that a scanning time of the laser light is equal to or shorter than a light-receivable time of the laser, the scanning time being a time to scan the laser light emitted from the laser light source in a certain wavelength range, the light-receivable time being a time in which the laser light reflected by the reflector can be received by the light receiver.Type: ApplicationFiled: February 14, 2019Publication date: August 22, 2019Applicant: Yokogawa Electric CorporationInventors: Kentaro Hazama, Junichi Matsuo, Nobuko Takekawa, Yuya Sugiyama
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Patent number: 9816918Abstract: A laser gas analyzer includes a light emitter which emits a laser light irradiated onto a gas to be measured; a light receiver which receives a laser light which transmitted the gas to be measured; a plurality of optical-axis adjustment mechanisms, one of which is provided in the light emitter and the other one of which is provided in the light receiver; a main display which is provided in one of the light emitter and the light receiver and displays thereon the measured result acquired by receiving the laser light which transmitted the gas to be measured; and a sub-display which is provided in the other one of the light emitter and the light receiver and displays thereon a part of the measured result displayed on the main display.Type: GrantFiled: October 1, 2015Date of Patent: November 14, 2017Assignee: Yokogawa Electric CorporationInventors: Kazuto Tamura, Kentaro Hazama, Makoto Kato
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Publication number: 20160153896Abstract: A laser gas analyzer includes a light emitter which emits a laser light irradiated onto a gas to be measured; a light receiver which receives a laser light which transmitted the gas to be measured; a plurality of optical-axis adjustment mechanisms, one of which is provided in the light emitter and the other one of which is provided in the light receiver; a main display which is provided in one of the light emitter and the light receiver and displays thereon the measured result acquired by receiving the laser light which transmitted the gas to be measured; and a sub-display which is provided in the other one of the light emitter and the light receiver and displays thereon a part of the measured result displayed on the main display.Type: ApplicationFiled: October 1, 2015Publication date: June 2, 2016Applicant: YOKOGAWA ELECTRIC CORPORATIONInventors: Kazuto TAMURA, Kentaro HAZAMA, Makoto KATO
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Patent number: 7366626Abstract: A calibration method in which secular change in sensor output values obtained at calibration times is estimated and the next calibration date can be determined at an appropriate interval and a zirconia-type oxygen analyzer using the above calibration method is achieved. The present invention is characterized by the fact that, in a calibration method in which a standard sample having a known value is measured and the output value of a measuring instrument corresponding to a sensor output value at the time of measurement is calibrated, the sensor output value obtained in implemented calibrating operations is stored in succession as the data for calibration history and the state of secular change in said sensor output value is estimated based on the stored past data for calibration history to determine the next calibration date.Type: GrantFiled: March 18, 2005Date of Patent: April 29, 2008Assignee: Yokogawa Electric CorporationInventors: Kentaro Hazama, Makoto Ishii, Yukihiro Seki
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Publication number: 20060019606Abstract: It is intended to realize a multi-channel measurement system and a power supply method for the system, the system being capable of performing maintenance of each of channel units and detectors without interrupting a power supply to the overall system. The multi-channel measurement system having a plurality of channel units each of which has a detector and performs measurement operation using a detection output from the detector and a power unit which supplies power to the channel units is characterized by a plurality of sub-switches respectively provided for the channel units, each of the sub-switches interrupting the power supply to the relevant channel unit, and a control unit for outputting a result of arithmetic processing of measurement outputs from the channel units and controlling the interruptions by the sub-switches.Type: ApplicationFiled: March 16, 2005Publication date: January 26, 2006Applicant: YOKOGAWA ELECTRIC CORPORATIONInventors: Kentaro Hazama, Makoto Ishii, Yukihiro Seki
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Publication number: 20050263408Abstract: A calibration method in which secular change in sensor output values obtained at calibration times is estimated and the next calibration date can be determined at an appropriate interval and a zirconia-type oxygen analyzer using the above calibration method is achieved. The present invention is characterized by the fact that, in a calibration method in which a standard sample having a known value is measured and the output value of a measuring instrument corresponding to a sensor output value at the time of measurement is calibrated, the sensor output value obtained in implemented calibrating operations is stored in succession as the data for calibration history and the state of secular change in said sensor output value is estimated based on the stored past data for calibration history to determine the next calibration date.Type: ApplicationFiled: March 18, 2005Publication date: December 1, 2005Applicant: YOKOGAWA ELECTRIC CORPORATIONInventors: Kentaro Hazama, Makoto Ishii, Yukihiro Seki