Title:
FILTERING METHOD FOR FREQUENCY ACQUISITION, DEVICE, COMPUTER READABLE STORAGE MEDIUM, AND LASER
Document Type and Number:
WIPO Patent Application WO/2019/128493
Kind Code:
A1
Abstract:
Disclosed in the present invention are a filtering method for frequency acquisition, a device, a computer readable storage medium, and a laser. The filtering method for frequency acquisition comprises: consecutively acquiring time intervals between adjacent rising edges and/or adjacent falling edges of a square wave signal; calculating a difference between two adjacent time intervals, if the difference exceeds a time threshold, discarding the two adjacent time intervals, otherwise retaining the two adjacent time intervals, and completing a first filtering operation; and comparing one of the two adjacent time intervals retained after the first filtering operation against a minimum period, retaining the two adjacent time intervals retained after the first filtering operation if one of the two adjacent time intervals retained after the first filtering operation is greater than the minimum period, and completing a second filtering operation. The technical solution of the present invention is time-efficient, filters out interference signals to a large degree, and does not readily cause a change of a waveform of a square wave signal.
Inventors:
HE GAOFENG (CN)
JIANG FENG (CN)
JIANG FENG (CN)
Application Number:
PCT/CN2018/114898
Publication Date:
July 04, 2019
Filing Date:
November 09, 2018
Export Citation:
Assignee:
MAXPHOTONICS CO LTD (CN)
International Classes:
H01S3/00; H04B10/50
Foreign References:
| CN107946879A | 2018-04-20 | |||
| CN106681190A | 2017-05-17 | |||
| CN107196674A | 2017-09-22 | |||
| GB777832A | 1957-06-26 | |||
| KR20140017057A | 2014-02-11 |
Attorney, Agent or Firm:
CHINA RANKTOP IP OFFICE (CN)
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