JPS5575621A - Water level detector - Google Patents

Water level detector

Info

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
Application number
JP15022478A
Other languages
Japanese (ja)
Inventor
Yasuhiro Shimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15022478A priority Critical patent/JPS5575621A/en
Publication of JPS5575621A publication Critical patent/JPS5575621A/en
Pending legal-status Critical Current

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
JP15022478A 1978-12-04 1978-12-04 Water level detector Pending JPS5575621A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6089719A (en) * 1983-10-21 1985-05-20 Sharp Corp Water level detector
JPS6317446U (en) * 1986-07-17 1988-02-05
JPS6317456U (en) * 1986-07-17 1988-02-05

Cited By (4)

* Cited by examiner, † Cited by third party
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
JPS6317446U (en) * 1986-07-17 1988-02-05
JPS6317456U (en) * 1986-07-17 1988-02-05

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