Systems and methods for optical measurements using multiple beam interferometric sensors
US-2016327414-A1 · Nov 10, 2016 · US
Counting device, physical quantity sensor, counting method, and physical quantity measuring method
US8996326B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8996326-B2 |
| Application number | US-82581210-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2010 |
| Priority date | Jun 29, 2009 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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A tension/speed measuring device comprises a laser driver for driving the oscillation of a semiconductor laser, and a counter for counting interference waveforms included in the output of a photodiode for converting the output of the semiconductor laser into an electrical signal. The counter measures the periods of interference waveforms during a measuring interval, where a frequency distribution for the periods of the interference waveforms during the measuring interval is generated from the measuring results, where a class value wherein the product of the class value and the frequency is a maximum is used as a representative value D 0 at the periods of the interference waveform, to calculate a total Ns of the frequencies of the classes that are less than 0.5 times the representative value T 0 and to calculate a total Nw n of the frequencies of the classes that are equal to or greater than (n+0.5) times the representative value T 0 and less than (n+1.5) times the representative value T 0 , to correct the counting results based on these frequencies Ns and Nwn.
First claim
Opening claim text (preview).
The invention claimed is: 1. A counter system counting signals having a substantially single frequency when a physical quantity is constant, wherein the physical quantity has a linear relationship with the signals, the counter system comprising: a counter counting the number of input signals during given counting intervals; a period measuring unit measuring signal periods of the input signals during the counting interval each time each input signal is inputted; a frequency dis…
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- G01D5/266Primary
Physics · mapped topic
- G01S17/34Primary
Physics · mapped topic
Physics · mapped topic
- G01S17/325Primary
Physics · mapped topic
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- What does patent US8996326B2 cover?
- A tension/speed measuring device comprises a laser driver for driving the oscillation of a semiconductor laser, and a counter for counting interference waveforms included in the output of a photodiode for converting the output of the semiconductor laser into an electrical signal. The counter measures the periods of interference waveforms during a measuring interval, where a frequency distributi…
- Who is the assignee on this patent?
- Ueno Tatsuya, Azbil Corp
- What technology area does this patent fall under?
- Primary CPC classification G01D5/266. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).