JPS5583818A - Level detector - Google Patents

Level detector

Info

Publication number
JPS5583818A
JPS5583818A JP15976278A JP15976278A JPS5583818A JP S5583818 A JPS5583818 A JP S5583818A JP 15976278 A JP15976278 A JP 15976278A JP 15976278 A JP15976278 A JP 15976278A JP S5583818 A JPS5583818 A JP S5583818A
Authority
JP
Japan
Prior art keywords
detected object
piezo
electric element
level
output voltage
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
Application number
JP15976278A
Other languages
Japanese (ja)
Other versions
JPS581371B2 (en
Inventor
Shinichi Ito
Toshiharu Tanaka
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 JP15976278A priority Critical patent/JPS581371B2/en
Publication of JPS5583818A publication Critical patent/JPS5583818A/en
Publication of JPS581371B2 publication Critical patent/JPS581371B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

PURPOSE: To make level detection passible with a simple constitution by vibrating a piezo-electric element in parallel with the level change direction of a detected object approximately and constituting a level detector so that the level detection signal voltage may be changed by the level of the detected object.
CONSTITUTION: Piezo-electric element 5 is constituted by providing electrode 2 and split electrodes 3 and 4 on one face and the other face of piezo-electric porcelain plate 1, and AC voltage Ein to vibrate piezo-electric element 5 is applied across terminals P1 and P2, and level detection signal voltage Eout is taken out across terminals P3 and P4. When much detected object 8 exists and piezo-electric element 5 is buried in detected object 8, vibration is suppressed, and output voltage Eout is small. Otherwise, when little detected object 8 exists and piezo-electric element 5 is outside detected object 8, suppression of vibration is released, and output voltage Eout becomes large. Consequently, the level of the detected object can be detected with a simple constitution by detecting this output voltage.
COPYRIGHT: (C)1980,JPO&Japio
JP15976278A 1978-12-20 1978-12-20 level detector Expired JPS581371B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15976278A JPS581371B2 (en) 1978-12-20 1978-12-20 level detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15976278A JPS581371B2 (en) 1978-12-20 1978-12-20 level detector

Publications (2)

Publication Number Publication Date
JPS5583818A true JPS5583818A (en) 1980-06-24
JPS581371B2 JPS581371B2 (en) 1983-01-11

Family

ID=15700703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15976278A Expired JPS581371B2 (en) 1978-12-20 1978-12-20 level detector

Country Status (1)

Country Link
JP (1) JPS581371B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5919816A (en) * 1982-07-27 1984-02-01 Chiyoda Seisakusho:Kk Level gauge
US4565942A (en) * 1983-07-01 1986-01-21 Murata Manufacturing Co., Ltd. Energy trapped piezoelectric resonator liquid sensor
JP2006194854A (en) * 2004-04-19 2006-07-27 Seiko Epson Corp Liquid detection device and liquid container including the device
KR101038777B1 (en) 2009-12-11 2011-06-03 (주)블렛스인더스트리 Receiving and distributing electricity equippment for saving power

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5919816A (en) * 1982-07-27 1984-02-01 Chiyoda Seisakusho:Kk Level gauge
US4565942A (en) * 1983-07-01 1986-01-21 Murata Manufacturing Co., Ltd. Energy trapped piezoelectric resonator liquid sensor
JP2006194854A (en) * 2004-04-19 2006-07-27 Seiko Epson Corp Liquid detection device and liquid container including the device
KR101038777B1 (en) 2009-12-11 2011-06-03 (주)블렛스인더스트리 Receiving and distributing electricity equippment for saving power

Also Published As

Publication number Publication date
JPS581371B2 (en) 1983-01-11

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