JPS5575621A - Water level detector - Google Patents
Water level detectorInfo
- Publication number
- JPS5575621A JPS5575621A JP15022478A JP15022478A JPS5575621A JP S5575621 A JPS5575621 A JP S5575621A JP 15022478 A JP15022478 A JP 15022478A JP 15022478 A JP15022478 A JP 15022478A JP S5575621 A JPS5575621 A JP S5575621A
- Authority
- JP
- Japan
- Prior art keywords
- water level
- reference voltage
- coil
- change
- detection 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
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
PURPOSE: To adjust the water level automatically with electronic control, by changing inductance of coil with the change in water level, detecting this as the output voltage of the voltage detection circuit, and comparing it with the reference voltage in response to a given water level.
CONSTITUTION: The change in the water level is converted into the change in air pressure for the diaphragm 1 and the expansion and contraction of the diaphragm 1 changes the position of the iron core 5 in the coil 4 to change the inductance of the coil 4. The voltage detection circuit 7 is connected in series with the coil 4 and connected to the power supply 8. Further, the output from the voltage detection circuit 7 is fed to the comparison circuit 9 and it is compared with the reference voltage from the reference voltage production circuit 10 producing the reference voltage corresponding to a given water level. When a given water level is indicated, the output of the comparison circuit 9 is inverted from high to low level to turn off the control element 12 controlling the water supply valve 11 and the valve 11 can be cut off at the specified water level. The reference voltage is adjusted when water level is changed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15022478A JPS5575621A (en) | 1978-12-04 | 1978-12-04 | Water level detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15022478A JPS5575621A (en) | 1978-12-04 | 1978-12-04 | Water level detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5575621A true JPS5575621A (en) | 1980-06-07 |
Family
ID=15492243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15022478A Pending JPS5575621A (en) | 1978-12-04 | 1978-12-04 | Water level detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5575621A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6089719A (en) * | 1983-10-21 | 1985-05-20 | Sharp Corp | Water level detector |
JPS6317456U (en) * | 1986-07-17 | 1988-02-05 | ||
JPS6317446U (en) * | 1986-07-17 | 1988-02-05 |
-
1978
- 1978-12-04 JP JP15022478A patent/JPS5575621A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6089719A (en) * | 1983-10-21 | 1985-05-20 | Sharp Corp | Water level detector |
JPH0237967B2 (en) * | 1983-10-21 | 1990-08-28 | Sharp Kk | |
JPS6317456U (en) * | 1986-07-17 | 1988-02-05 | ||
JPS6317446U (en) * | 1986-07-17 | 1988-02-05 |
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