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:
Feb. 10, 2009
Filed:
Apr. 27, 2007
An-bang Wang, Taipei, TW;
Ming-hsun Wu, Taipei, TW;
Yi-hua Wang, Taipei, TW;
I-chun Lin, Taipei, TW;
Chia-chih Chen, Taipei, TW;
Shiming Lin, Taipei, TW;
An-Bang Wang, Taipei, TW;
Ming-Hsun Wu, Taipei, TW;
Yi-Hua Wang, Taipei, TW;
I-Chun Lin, Taipei, TW;
Chia-Chih Chen, Taipei, TW;
Shiming Lin, Taipei, TW;
National Taiwan University, Taipei, TW;
Abstract
A high-precision vortex flow meter includes a blunt body having a predetermined dimension and being arranged inside a fluid channel to serve as a vortex shedder. The vortex flow meter also includes a temperature detecting device for detecting the vortex shedder temperature and a temperature control element for adjusting the vortex shedder temperature. A frequency measuring device is arranged in the downstream section of the blunt body for detecting the vortex shedding frequency. From the measured temperatures of the upstream fluid flow and that of the blunt body, an effective temperature and a temperature ratio are calculated. The kinematic viscosity of the fluid is looked up from database. By using the relationship between the Strouhal number and Reynolds number, the fluid flow rate is calculated. By employing different blunt body temperature, the measurement range of the flow meter can be broadly extended.