公开(公告)号：US20180136182A1

公开(公告)日：2018-05-17

申请号：US15351086

申请日：2016-11-14

Applicant: ORIENTAL SYSTEM TECHNOLOGY INC.

Inventor： Chien-Hsun WANG

IPC: G01N33/00 ,  G01N27/02

CPC classification number: G01N33/0036 ,  G01N27/124 ,  G01N33/0073

Abstract: A multi-gas analysis includes a semiconductor gas sensor driven by a constant resistance driver circuit with a driving current to obtain a sensing output of a gas in a gas sample. A processing unit is operable, based on a reference voltage from the constant resistance driver circuit associated with the driving current, in one of a gas-identification mode, where the gas is identified based on the sensing output obtained in response to fine variation of the operating temperature of the semiconductor gas sensor, and a gas-detection mode, where an analysis result indicative of the concentration of the gas is obtained based on the sensing output obtained in response to an optimal operating temperature of the semiconductor gas sensor.

公开(公告)号：US20170100057A1

公开(公告)日：2017-04-13

申请号：US14880607

申请日：2015-10-12

Applicant: ORIENTAL SYSTEM TECHNOLOGY INC.

Inventor： Chien-Hsun WANG

IPC: A61B5/08 ,  G01N21/3504 ,  A61M39/24 ,  G01N33/497 ,  A61B5/097 ,  A61B5/00

CPC classification number: A61B5/082 ,  A61B5/0082 ,  A61B5/097 ,  A61B5/7225 ,  A61B5/7278 ,  A61B5/742 ,  A61B2560/0223 ,  A61B2560/0431 ,  A61B2562/028 ,  A61M39/24 ,  G01N21/3504 ,  G01N21/61 ,  G01N33/497 ,  G01N2033/4975 ,  G01N2201/0221

Abstract: A portable NDIR breath acetone measurement apparatus includes a portable housing formed with an optical cavity, which is housed in a receiving chamber for containing a gas sample taken from an exhaled breath of a human subject. A control unit controls the temperature in the receiving chamber to a desired temperature, and controls an IR emitter disposed in the receiving chamber to stably emit IR spectrum radiation propagating along a zigzag path toward an IR detector, which is operated at the desired temperature to generate, in response to detection of the IR spectrum radiation, an IR signal that is processed and analyzed by a signal processing unit to obtain a measurement result indicative of the concentration of acetone gas contained in the gas sample.

公开(公告)号：US20140209800A1

公开(公告)日：2014-07-31

申请号：US13803775

申请日：2013-03-14

Applicant: ORIENTAL SYSTEM TECHNOLOGY INC.

Inventor： Jin-Shown SHIE ,  Chien-Hsun WANG

IPC: G01N21/61 ,  H05B39/04

CPC classification number: H05B39/04 ,  G01N21/3504

Abstract: An NDIR gas detector includes a photodetector for detecting a portion of stray visible light emitted from an incandescent lamp so as to generate an induced electrical signal, which is compared with a preset reference signal associated with a predetermined constant level of the stray visible light corresponding to a constant temperature of the lamp so as to obtain a level difference between the induced electrical signal and the reference signal. Electrical power supplied to the lamp is repeatedly regulated based on the level difference until the induced electrical signal and the reference signal have the same level, thereby stabilizing IR emission of the lamp in response to the lamp being kept at the constant temperature.

Abstract translation: NDIR气体检测器包括用于检测从白炽灯发射的杂散可见光的一部分的光电检测器，以产生感应电信号，该感应电信号与预定的参考信号进行比较，该参考信号与对应于 灯的恒定温度，以便获得感应电信号和参考信号之间的电平差。 供电到灯的电力基于电平差反复调节，直到感应电信号和参考信号具有相同的电平，由此响应于灯被保持在恒定温度来稳定灯的IR发射。