JPH0197222U - - Google Patents
Info
- Publication number
- JPH0197222U JPH0197222U JP19338087U JP19338087U JPH0197222U JP H0197222 U JPH0197222 U JP H0197222U JP 19338087 U JP19338087 U JP 19338087U JP 19338087 U JP19338087 U JP 19338087U JP H0197222 U JPH0197222 U JP H0197222U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- voltage
- alarm
- determining 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
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Emergency Alarm Devices (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
は第１図で指定した個所における波形を示した、
本考案の作用を説明するための図、第３図は本考
案の従来例を示す回路図である。
２０……信号発生回路、３０……基準値決定回
路、４０……デユーテイ決定回路、５０……警報
回路。
Fig. 1 is a circuit diagram showing an embodiment of the present invention, and Fig. 2 shows waveforms at the points specified in Fig. 1.
FIG. 3, which is a diagram for explaining the operation of the present invention, is a circuit diagram showing a conventional example of the present invention. 20...Signal generation circuit, 30...Reference value determining circuit, 40...Duty determining circuit, 50...Alarm circuit.
Claims (1)
、前記電気信号を増幅しかつこの増幅された信号
の上限と下限の電圧を設定する基準値決定回路と
、タンク内に設置された接点式スイツチがタンク
内の液体の残量変化によりオン、オフするととも
にコンデンサに電荷を充、放電するようにしたこ
のコンデンサの電圧と前記基準値決定回路で増幅
された信号の電圧とを比較しこの比較結果から出
力信号のデユーテイ比を決定するデユーテイ決定
回路と、このデユーテイ決定回路の出力信号の電
圧に応じて警報を行う警報回路とから成ることを
特徴とする液体残量警報装置。 A signal generation circuit that outputs an electric signal of a constant period, a reference value determination circuit that amplifies the electric signal and sets the upper and lower limit voltages of this amplified signal, and a contact type switch installed inside the tank. The voltage of this capacitor, which is turned on and off depending on changes in the amount of liquid remaining in the tank, and charges and discharges the capacitor, is compared with the voltage of the signal amplified by the reference value determining circuit, and based on the comparison result, A liquid remaining amount alarm device comprising: a duty determining circuit that determines a duty ratio of an output signal; and an alarm circuit that issues an alarm in accordance with the voltage of the output signal of the duty determining circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19338087U JPH0197222U (en) | 1987-12-19 | 1987-12-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19338087U JPH0197222U (en) | 1987-12-19 | 1987-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197222U true JPH0197222U (en) | 1989-06-28 |
Family
ID=31484173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19338087U Pending JPH0197222U (en) | 1987-12-19 | 1987-12-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197222U (en) |
-
1987
- 1987-12-19 JP JP19338087U patent/JPH0197222U/ja active Pending