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:
May. 06, 2014
Filed:
Apr. 28, 2011
Xiang-biao Chen, Shenzhen, CN;
Li-ping Fan, Shenzhen, CN;
Yu-lin Liu, Shenzhen, CN;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, CN;
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Abstract
A fan speed testing system includes a voltage regulating module, a rotational frequency collecting module, and a rotational frequency converting module. The voltage regulating module receives an AC voltage signal and converts the AC voltage signal to a variable first DC voltage signal to adjust a rotational speed of a fan. The rotational frequency collecting module detects the rotational speed of the fan and outputs rotational frequency signals. The rotational frequency converting module receives the rotational frequency signals and determines the rotational speed of the fan according to numbers and period of time level voltage switching in the rotational frequency signals.