The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 01, 2008
Filed:
Dec. 24, 2003
Yih-shiaw Huang, Hsinchu, TW;
Miao-ju Chueh, Hsinchu, TW;
I-cherng Chen, Hsinchu, TW;
Tung-sheng Shih, Taipei, TW;
Yih-Shiaw Huang, Hsinchu, TW;
Miao-Ju Chueh, Hsinchu, TW;
I-Cherng Chen, Hsinchu, TW;
Tung-Sheng Shih, Taipei, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A pulse-type gas concentration measurement system and a method of pulse-type gas concentration measurement in a specific environment. When the sensor is located at a specific position, a variable pulse-modulated voltage is sent to the sensor, so that the sensor outputs a first signal to the processing device. The processing device compares the first signal to the chemical matter characteristics signals to determine the composition and concentration of respective constituents in the gas, and determines a detection voltage according to the first signal. Then, a square-wave pulse with the detection voltage is sent intermittently to the sensor, so that the sensor outputs a second signal to the processing device. The processing device compares the second signal to the chemical matter characteristics signal to determine the concentration variation of each respective constituent of the gas.