JPS5784317A - Powder sensor - Google Patents

Powder sensor

Info

Publication number
JPS5784317A
JPS5784317A JP16073780A JP16073780A JPS5784317A JP S5784317 A JPS5784317 A JP S5784317A JP 16073780 A JP16073780 A JP 16073780A JP 16073780 A JP16073780 A JP 16073780A JP S5784317 A JPS5784317 A JP S5784317A
Authority
JP
Japan
Prior art keywords
powder
longitudinal direction
electrodes
piezoelectric substrate
exciting electrode
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
JP16073780A
Other languages
Japanese (ja)
Inventor
Nobuteru Asai
Isamu Terajima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP16073780A priority Critical patent/JPS5784317A/en
Publication of JPS5784317A publication Critical patent/JPS5784317A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To make it possible to measure powder quantity in a container without fail by using a device on a comb shaped exciting electrode and one or more pairs of receiving electrodes on the surface of a piezoelectric substrate on which an elastic surface wave is propagated in the longitudinal direction. CONSTITUTION:A sensing element is formed by providing the comb shaped exciting electrode and several pairs of receiving electrodes on the surface of the piezoelectric substrate on which the elastic surface wave propagates in the longitudinal direction with a specified distance being provided. Then said element is provided so that its longitudinal direction is oriented to the depth of the powder. The level or the quantity of the powder is sensed by processing the received signal which varies based on the contact of the powder and the receiving electodes. For example, the sensing element, wherein thr exciting electrode 22 and the receiving electrodes 23, 24, and 25 are provided on the piezoelectric substrate 22, is provided so that its longitudinal direction is equal to the depth of the powder. A signal is generated between the electrodes 22 and 23, and the powder quantity is sensed by the outputs V01 and V02 based on the contact between the electrodes 24 and 25.
JP16073780A 1980-11-17 1980-11-17 Powder sensor Pending JPS5784317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16073780A JPS5784317A (en) 1980-11-17 1980-11-17 Powder sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16073780A JPS5784317A (en) 1980-11-17 1980-11-17 Powder sensor

Publications (1)

Publication Number Publication Date
JPS5784317A true JPS5784317A (en) 1982-05-26

Family

ID=15721359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16073780A Pending JPS5784317A (en) 1980-11-17 1980-11-17 Powder sensor

Country Status (1)

Country Link
JP (1) JPS5784317A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03170027A (en) * 1989-11-28 1991-07-23 Nisshin Flour Milling Co Ltd Granular body gauge
JPH0620349U (en) * 1992-04-20 1994-03-15 東洋プラント工業株式会社 Pneumatic transport device switching valve
KR100397815B1 (en) * 2001-05-16 2003-09-13 태웅실업주식회사 Powder level sensing circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03170027A (en) * 1989-11-28 1991-07-23 Nisshin Flour Milling Co Ltd Granular body gauge
JPH0620349U (en) * 1992-04-20 1994-03-15 東洋プラント工業株式会社 Pneumatic transport device switching valve
KR100397815B1 (en) * 2001-05-16 2003-09-13 태웅실업주식회사 Powder level sensing circuit

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