JPH0351321U - - Google Patents
Info
- Publication number
- JPH0351321U JPH0351321U JP11322289U JP11322289U JPH0351321U JP H0351321 U JPH0351321 U JP H0351321U JP 11322289 U JP11322289 U JP 11322289U JP 11322289 U JP11322289 U JP 11322289U JP H0351321 U JPH0351321 U JP H0351321U
- Authority
- JP
- Japan
- Prior art keywords
- heat source
- mode optical
- measured
- single mode
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000001427 coherent effect Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims 3
- 239000012530 fluid Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は本考案の一実施例を示す構成ブロツク
図、第２図は本考案の他の実施例を示す構成ブロ
ツク図、第３図は本考案の更に別の実施例を示す
構成図、第４図は従来の熱式流量計の一例を示す
構成図である。
１……管路、２……熱源、３１，３２……シン
グルモード光導波路、４……可干渉光源、５……
受光素子、６……信号処理回路、７……熱源制御
回路。
FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram showing yet another embodiment of the present invention. FIG. 4 is a configuration diagram showing an example of a conventional thermal flowmeter. 1...Pipe line, 2...Heat source, 31, 32...Single mode optical waveguide, 4...Coherent light source, 5...
Light receiving element, 6... signal processing circuit, 7... heat source control circuit.
Claims (1)
上流側と下流側との温度検出を行い、その温度差
と熱源に与えるエネルギーとの関係から被測定流
量を測定するようにした熱式流量計において、 前記上流側と下流側との温度検出を行う手段を
、 前記熱源に対して上流側と下流側にそれぞれ配
置した２本以上のシングルモード光導波路と、 このシングルモード光導波路に可干渉光を入射
させる可干渉光源と、 前記２本のシングルモード光導波路を通過した
光を受光しその受光面に作られる干渉縞を検出す
る受光素子と、 この受光素子からの信号を処理し温度差に対応
した信号を得る信号処理回路と で構成したことを特徴とする熱式流量計。[Claim for Utility Model Registration] The fluid to be measured is heated by a heat source, the temperature is detected on the upstream and downstream sides of the heat source, and the flow rate to be measured is measured from the relationship between the temperature difference and the energy given to the heat source. In the thermal flowmeter, the means for detecting temperatures on the upstream side and the downstream side includes two or more single mode optical waveguides arranged respectively on the upstream side and the downstream side with respect to the heat source, and the single mode optical waveguide. a coherent light source that inputs coherent light into the mode optical waveguide; a light receiving element that receives the light that has passed through the two single mode optical waveguides and detects interference fringes formed on its light receiving surface; A thermal flowmeter characterized by comprising a signal processing circuit that processes signals and obtains signals corresponding to temperature differences.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11322289U JPH0351321U (en) | 1989-09-27 | 1989-09-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11322289U JPH0351321U (en) | 1989-09-27 | 1989-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0351321U true JPH0351321U (en) | 1991-05-20 |
Family
ID=31661641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11322289U Pending JPH0351321U (en) | 1989-09-27 | 1989-09-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0351321U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006081497A (en) * | 2004-09-17 | 2006-03-30 | Westwork:Kk | Movable type bush cutter |
| KR101355629B1 (en) * | 2011-05-09 | 2014-01-28 | 상진옥 | Ripper equipment for excavator |
-
1989
- 1989-09-27 JP JP11322289U patent/JPH0351321U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006081497A (en) * | 2004-09-17 | 2006-03-30 | Westwork:Kk | Movable type bush cutter |
| KR101355629B1 (en) * | 2011-05-09 | 2014-01-28 | 상진옥 | Ripper equipment for excavator |
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