JPS5863532U - Liquid level detection device - Google Patents
Liquid level detection deviceInfo
- Publication number
- JPS5863532U JPS5863532U JP15935081U JP15935081U JPS5863532U JP S5863532 U JPS5863532 U JP S5863532U JP 15935081 U JP15935081 U JP 15935081U JP 15935081 U JP15935081 U JP 15935081U JP S5863532 U JPS5863532 U JP S5863532U
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- detection circuit
- resistance value
- detection device
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 title claims description 8
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Level Indicators Using A Float (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は摺動抵抗式検出ユニットの一般例を示す構成図
、第２図は第１図に示す摺動抵抗を利用した液位低下検
出用の従来例を示す回路構成図、第３図はサーミスタの
抵抗値変化を利用した液位低下検出用の従来例を示す回
路構成図、第４図は第３図における検出電圧の電源投入
時からの変化を説明する電圧波形図、第５図は本考案に
係る液位検出装置の一実施例を示す回路構成図である。Fig. 1 is a block diagram showing a general example of a sliding resistance type detection unit, Fig. 2 is a circuit block diagram showing a conventional example for liquid level drop detection using the sliding resistance shown in Fig. 1, and Fig. 3 4 is a circuit configuration diagram showing a conventional example of liquid level drop detection using a change in the resistance value of a thermistor, FIG. 4 is a voltage waveform diagram illustrating changes in the detection voltage in FIG. 3 from when the power is turned on, and FIG. 1 is a circuit configuration diagram showing an embodiment of a liquid level detection device according to the present invention.
Claims (1)
、液中と空気中における放熱係数の相違による抵抗値変
化を検出する第１の検出回路と、液位に応じて浮動する
フロートに固着された摺動抵抗の抵抗値変化を検出する
第２の検出回路と、電源投入初期には上記第２の検出回
路の出力状態を判定し、サーミスタへの通電後自己発熱
による正規抵抗値への安定以降は上記第１の検出回路の
出力状態を判定する処理回路と、処理回路の判定出力に
より作動する警報回路とから構成される液位検出装置。The first detection circuit has a thermistor installed at a predetermined position within the liquid container to detect changes in resistance due to the difference in heat radiation coefficient between the liquid and air, and is fixed to a float that floats according to the liquid level. A second detection circuit detects the change in the resistance value of the sliding resistor, and at the beginning of power-on, the output state of the second detection circuit is determined, and after the thermistor is energized, the resistance value changes to the normal resistance value due to self-heating. After stabilization, the liquid level detection device is comprised of a processing circuit that determines the output state of the first detection circuit, and an alarm circuit that is activated by the determination output of the processing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15935081U JPS5863532U (en) | 1981-10-26 | 1981-10-26 | Liquid level detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15935081U JPS5863532U (en) | 1981-10-26 | 1981-10-26 | Liquid level detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5863532U true JPS5863532U (en) | 1983-04-28 |
Family
ID=29951804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15935081U Pending JPS5863532U (en) | 1981-10-26 | 1981-10-26 | Liquid level detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5863532U (en) |
-
1981
- 1981-10-26 JP JP15935081U patent/JPS5863532U/en active Pending
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