JPH01140134U - - Google Patents
Info
- Publication number
- JPH01140134U JPH01140134U JP3529988U JP3529988U JPH01140134U JP H01140134 U JPH01140134 U JP H01140134U JP 3529988 U JP3529988 U JP 3529988U JP 3529988 U JP3529988 U JP 3529988U JP H01140134 U JPH01140134 U JP H01140134U
- Authority
- JP
- Japan
- Prior art keywords
- sample
- hold circuit
- heating element
- constant current
- circuit
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000005070 sampling Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
第１図はこの考案の一実施例による液面位測定
装置を示す回路構成図、第２図は第１図の動作を
説明するためのタイムチヤート、第３図は従来の
液面位測定装置を示す回路構成図、第４図は第３
図における液面レベルセンサを示す該略図、第５
図は第３図の動作を説明するためのタイムチヤー
トである。
Ｒｓ……発熱体（センサ抵抗）、４……定電流
回路、６……第１のサンプルホールド回路、７…
…割算器、８……第２のサンプルホールド回路。
Fig. 1 is a circuit diagram showing a liquid level measuring device according to an embodiment of this invention, Fig. 2 is a time chart for explaining the operation of Fig. 1, and Fig. 3 is a conventional liquid level measuring device. The circuit configuration diagram shown in Fig. 4 is the third
The schematic diagram showing the liquid level sensor in Figure 5.
The figure is a time chart for explaining the operation of FIG. 3. Rs... Heating element (sensor resistance), 4... Constant current circuit, 6... First sample hold circuit, 7...
...Divider, 8...Second sample and hold circuit.
Claims (1)
Ｒｓと、該発熱体に定電流を断続的に供給する定
電流回路４と、前記発熱体Ｒｓへの定電流供給直
後に該発熱体の両端に発生する電位差をサンプリ
ングして記憶する第１のサンプルホールド回路６
と、該第１のサンプルホールド回路の作動後に前
記発熱体Ｒｓの両端に発生する電位差を、前記第
１のサンプルホールド回路６に記憶された電位差
で除算する割算器７と、該割算器の出力をサンプ
リングして記憶する第２のサンプルホールド回路
８とを備え、該第２のサンプルホールド回路の出
力を液面位信号となすことを特徴とする液面位測
定装置。 A film-like heating element Rs disposed along the displacement direction of the liquid surface, a constant current circuit 4 that intermittently supplies a constant current to the heating element, and a constant current circuit 4 that supplies the heating element with constant current immediately after supplying the constant current to the heating element Rs. A first sample and hold circuit 6 that samples and stores the potential difference occurring across the body.
and a divider 7 that divides the potential difference generated across the heating element Rs after the first sample and hold circuit is activated by the potential difference stored in the first sample and hold circuit 6, and the divider 7. A liquid level measuring device comprising: a second sample and hold circuit 8 for sampling and storing the output of the second sample and hold circuit, and using the output of the second sample and hold circuit as a liquid level signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3529988U JPH0535293Y2 (en) | 1988-03-18 | 1988-03-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3529988U JPH0535293Y2 (en) | 1988-03-18 | 1988-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01140134U true JPH01140134U (en) | 1989-09-26 |
| JPH0535293Y2 JPH0535293Y2 (en) | 1993-09-08 |
Family
ID=31261954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3529988U Expired - Lifetime JPH0535293Y2 (en) | 1988-03-18 | 1988-03-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535293Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013111847A1 (en) * | 2012-01-26 | 2013-08-01 | 株式会社東芝 | Liquid level detection device and method |
-
1988
- 1988-03-18 JP JP3529988U patent/JPH0535293Y2/ja not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013111847A1 (en) * | 2012-01-26 | 2013-08-01 | 株式会社東芝 | Liquid level detection device and method |
| JP2013156036A (en) * | 2012-01-26 | 2013-08-15 | Toshiba Corp | Liquid level detecting device and method |
| US9423286B2 (en) | 2012-01-26 | 2016-08-23 | Kabushiki Kaisha Toshiba | Liquid level sensing apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0535293Y2 (en) | 1993-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH02103264U (en) | ||
| JPS6233804U (en) | ||
| JPH0259460U (en) | ||
| JPH01132243U (en) | ||
| JPS6370069U (en) | ||
| JPS62188778U (en) | ||
| JPS5857721U (en) | Piezoelectric oscillation type liquid level detection device | |
| JPS6279158U (en) | ||
| JPH0217651U (en) | ||
| JPH038733U (en) | ||
| JPS6275878U (en) | ||
| JPH0390077U (en) | ||
| JPH0230039U (en) | ||
| JPH01145953U (en) | ||
| JPH01147770U (en) | ||
| JPS61123981U (en) | ||
| JPS61147939U (en) | ||
| JPS6416073U (en) | ||
| JPS61164758U (en) | ||
| JPS62157503U (en) | ||
| JPS61184959U (en) | ||
| JPH01110343U (en) | ||
| JPH01128181U (en) | ||
| JPS60117169U (en) | Sensor device for detecting the end position of printer ink donor film, etc. | |
| JPS6214333U (en) |