CN101515156A - Precise time measuring method - Google Patents
Precise time measuring method Download PDFInfo
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- CN101515156A CN101515156A CNA2009100819144A CN200910081914A CN101515156A CN 101515156 A CN101515156 A CN 101515156A CN A2009100819144 A CNA2009100819144 A CN A2009100819144A CN 200910081914 A CN200910081914 A CN 200910081914A CN 101515156 A CN101515156 A CN 101515156A
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Abstract
The invention relates to a precise time measuring method, consisting of a waveform conversion module, an analog-to-digital conversion module, a counting module and a central processing module. The invention has the advantages that a method for eliminating decimal phase error of square wave is provided, and the method effectively improves the time measuring precision with lower cost.
Description
Technical field
The present invention relates to a kind of Method Of Time Measurement of precision, more particularly, is a kind of waveform transformation of utilizing, and square wave is converted to triangular wave, thereby carries out the method for precision timing.
Background technology
Under a lot of application scenarios, need accurately obtain temporal information.In common measuring method, owing to square-wave waveform, generally only can be accurate on the integer square wave, and the error of introducing decimal times square width.Like this, error range is exactly the width of a square wave.
This precise time measuring method is the effective technology means that reduce the time measurement error.It is converted into triangular wave with square wave, by the measurement to the triangular wave amplitude, draws accurate square wave phase, thereby draws precise time information.
Summary of the invention
The objective of the invention is to: proposed a kind of precision timing method, can dwindle effectively because of square wave phase and be difficult to measure the time determination error that causes based on waveform transformation.
Technical scheme of the present invention is: square-wave signal is divided into two-way: the one tunnel is square wave, and another road is by waveform transformation square wave to be become the triangular wave synchronous with it.By to the square wave counting, can obtain the timing of square-wave cycle integral multiple; By measuring the amplitude of triangular wave, can draw the phase information of square wave, i.e. square-wave cycle decimal times timing.Time study method is made of waveform transformation module, analog-to-digital conversion module, counting module, central processing module.The function that the waveform transformation module will be finished is that square-wave signal is passed through waveform transformation, converts synchronous with it triangular signal to.The function that analog-to-digital conversion module will be finished is that triangular wave is carried out corresponding analog to digital conversion.The function that counting module will be finished is that the square wave integral multiple cycle is carried out timing, obtains square-wave cycle integral multiple temporal information.The function that central processing module will be finished is to eliminate the problem that the triangular wave phase place " is blured ", and output precise time information.
Advantage of the present invention is: a kind of method of eliminating square wave decimal times phase error is provided, and this method has improved the time measurement precision effectively with less cost.
Description of drawings
Fig. 1 is the measuring principle block diagram.
Fig. 2 utilizes MAX038 to realize the circuit of waveform transformation.
Fig. 3 is measured waveform figure.
Embodiment
Below the present invention is done and describe in further detail.Referring to Fig. 1, the present invention is made of waveform transformation module, analog-to-digital conversion module, counting module, central processing module.
The function that A waveform transformation module is finished is: square-wave signal is converted to synchronous with it triangular signal.Fig. 2 has provided the waveform transformation mode that a kind of (being not limited to) utilizes MAX038 to realize.
The function that the B analog-to-digital conversion module is finished is: under the effect of initial pulse and stopping pulse, triangular wave is carried out corresponding analog to digital conversion.Wherein, conversion requires to finish in an initial or stopping pulse.
The function that the C counting module is finished is: the integral multiple square-wave cycle between initial pulse and the stopping pulse is counted, obtained square wave integral multiple clocking information.
The function that the D central processing module is finished is: the problem that elimination triangular wave phase place " is blured " also provides square wave phase information, thereby provides square-wave cycle decimal times clocking information; And the square wave integral multiple clocking information of combined count module, finally provide the chronometer time metrical information.
The function that central processing module will be finished is: judge that analog to digital conversion gained number of sampling is according to first half or latter half at square wave, as shown in Figure 3.A is different with the phase place of 2 of B, but the analog to digital conversion output data is identical, and promptly the triangular wave phase place " is blured ".The method of eliminating " bluring " includes but not limited to associating square wave polarity discriminating method.Associating square wave phase diagnostic method is promptly taken a sample to the input square wave under initial pulse or stopping pulse control, determines that the position of sampling spot in square wave just is in preceding semiperiod or later half cycle, thereby eliminates " bluring ".
Finally, the temporal information of central processing module output is:
Claims (5)
1, a kind of Method Of Time Measurement of precision, it is made of waveform transformation module, analog-to-digital conversion module, counting module, central processing module.
2, Method Of Time Measurement according to claim 1 is characterized in that the waveform transformation module is converted to triangular wave with square wave.
3, Method Of Time Measurement according to claim 1 is characterized in that analog-to-digital conversion module is digital signal with the triangular wave of waveform transformation module output by analog signal conversion.
4, Method Of Time Measurement according to claim 1 is characterized in that the numerical information elimination triangular wave phase ambiguity of central processing module according to analog-to-digital conversion module output, draws temporal information.
5, central processing module according to claim 4 is characterized in that eliminating fuzzy method and including but not limited to associating square wave polarity discriminating method according to the square wave polarity information elimination triangular wave phase ambiguity synchronous with triangular wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100819144A CN101515156B (en) | 2009-04-09 | 2009-04-09 | Precise time measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100819144A CN101515156B (en) | 2009-04-09 | 2009-04-09 | Precise time measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101515156A true CN101515156A (en) | 2009-08-26 |
| CN101515156B CN101515156B (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100819144A Expired - Fee Related CN101515156B (en) | 2009-04-09 | 2009-04-09 | Precise time measuring method |
Country Status (1)
| Country | Link |
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| CN (1) | CN101515156B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594354A (en) * | 2012-03-02 | 2012-07-18 | 北京航空航天大学 | Time-to-digital converter based on time-to-amplitude conversion method |
| CN111830816A (en) * | 2020-06-28 | 2020-10-27 | 南京天朗防务科技有限公司 | Self-adaptive timing method and device |
-
2009
- 2009-04-09 CN CN2009100819144A patent/CN101515156B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594354A (en) * | 2012-03-02 | 2012-07-18 | 北京航空航天大学 | Time-to-digital converter based on time-to-amplitude conversion method |
| CN102594354B (en) * | 2012-03-02 | 2014-08-20 | 北京航空航天大学 | Time-to-digital converter based on time-to-amplitude conversion method |
| CN111830816A (en) * | 2020-06-28 | 2020-10-27 | 南京天朗防务科技有限公司 | Self-adaptive timing method and device |
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| Publication number | Publication date |
|---|---|
| CN101515156B (en) | 2011-05-18 |
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Granted publication date: 20110518 Termination date: 20120409 |