Flow rate measuring apparatus
US-2021080304-A1 · Mar 18, 2021 · US
Flow rate measuring apparatus
US11248942B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11248942-B2 |
| Application number | US-201916968312-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 18, 2019 |
| Priority date | Feb 22, 2018 |
| Publication date | Feb 15, 2022 |
| Grant date | Feb 15, 2022 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The flow rate measuring apparatus according to one aspect of the present invention is a flow rate measuring apparatus that intermittently measures the flow rate of a fluid, comprising a heating unit for heating the fluid; a control unit that controls a drive voltage for driving the heating unit, or the interval at which the drive voltage is applied, to the desired value; a temperature sensing unit that senses information about the temperature of the heated fluid; and a flow rate measurement unit that measures the flow rate of the fluid on the basis of the sensing signal outputted from the temperature sensing unit, wherein, in intermittently measuring the flow rate, the control unit varies the heating amount of the heating unit in each measurement by varying the interval at which the drive voltage is applied.
First claim
Opening claim text (preview).
The invention claimed is: 1. A flow rate measuring apparatus that intermittently measures the flow rate of a fluid, comprising: a heating unit for heating the fluid; a control unit that controls a drive voltage for driving the heating unit, and an interval at which the drive voltage is applied, to a desired value; a temperature sensing unit that senses information about a temperature of the heated fluid; and a flow rate measurement unit that measures the flow rate of the fluid based on a sensing signal outputted from the temperature sensing unit, wherein, in intermittently measuring the flow rate, the control unit varies a heating amount of the heating unit in each measurement by varying the interval at which the drive voltage is applied. 2. The flow rate measuring apparatus according to claim 1 , wherein, in the intermittent measurement, the interval at which the drive voltage is applied is kept constant, and is shortened in a specific measurement. 3. The flow rate measuring apparatus according to claim 1 , wherein, in the intermittent measurement, the drive voltage of each measurement is composed of voltage of one rectangular wave, and in a specific measurement, the drive voltage is composed of voltage of a plurality of rectangular waves. 4. The flow rate measuring apparatus according to claim 1 , wherein, in intermittently measuring the flow rate, the control unit varies the heating amount of the heating unit in each measurement by varying the drive voltage. 5. The flow rate measuring apparatus according to claim 1 , further comprising: a second heating unit; second temperature sensing units provided flanking the second heating unit in a direction of blocking the flow of the fluid; and a characteristic measurement unit that measures a characteristic of the fluid based on sensing signals outputted from the second temperature sensing units, wherein the control unit further controls a second drive voltage for driving the second heating unit, or an interval at which the second drive voltage is applied, to a desired value.
Assignees
Inventors
Classifications
- G01F1/696Primary
Circuits therefor, e.g. constant-current flow meters · CPC title
Micromachined devices · CPC title
by control of a separate heating or cooling element · CPC title
- G01F1/6986Primary
with pulsed heating, e.g. dynamic methods · CPC title
Thermoelectric elements, e.g. thermocouples, thermopiles · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11248942B2 cover?
- The flow rate measuring apparatus according to one aspect of the present invention is a flow rate measuring apparatus that intermittently measures the flow rate of a fluid, comprising a heating unit for heating the fluid; a control unit that controls a drive voltage for driving the heating unit, or the interval at which the drive voltage is applied, to the desired value; a temperature sensing u…
- Who is the assignee on this patent?
- Omron Tateisi Electronics Co
- What technology area does this patent fall under?
- Primary CPC classification G01F1/696. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 15 2022 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).