JPS54116269A - Level detector for powder and granular materials - Google Patents

Level detector for powder and granular materials

Info

Publication number
JPS54116269A
JPS54116269A JP2204878A JP2204878A JPS54116269A JP S54116269 A JPS54116269 A JP S54116269A JP 2204878 A JP2204878 A JP 2204878A JP 2204878 A JP2204878 A JP 2204878A JP S54116269 A JPS54116269 A JP S54116269A
Authority
JP
Japan
Prior art keywords
tuning bar
powder
tuning
bar
natural frequency
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
JP2204878A
Other languages
Japanese (ja)
Other versions
JPS5947246B2 (en
Inventor
Isamu Komatsu
Masayasu Anzai
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.)
Koki Holdings Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Koki 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 Hitachi Ltd, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP53022048A priority Critical patent/JPS5947246B2/en
Publication of JPS54116269A publication Critical patent/JPS54116269A/en
Publication of JPS5947246B2 publication Critical patent/JPS5947246B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To achieve the prevention of deposition of powder and granular materials on a level detecting vibrator and enable the detector to operate surely even for powder and granular materials of high cohesive and adhesive forces by forcefully vibrating the vibrator such as tuning fork, tuning bar of the like with natural frequency.
CONSTITUTION: When the output voltage of an oscillating circuit 4 generating voltage at the frequency nearly equal to the natural frequency of a tuning bar 1 is applied to an electrostrictive vibrating element 3a, the tuning bar 1 is forcefully vibrated by the natural frequency and this causes the electrostrictive vibrating element 3b to generate an electric signal. After this signal is amplified with an amplifier 5, it is converted to an arbitrary signal in a signal processing circuit 6. Now, when powder or granular material touches the tuning bar 1 and restrains the same, the vibrations of the tuning bar 1 attenuate or stop, but when there is no more powder or granular material, the tuning bar 1 again begins to make separate excitation vibration. This enables the level of the one restraining the vibration of the tuning bar 1 to be detected by the output voltage of the amplifier 5 and the powder or granular material depositing on the tuning bar 1 to be readily shaken off by the forceful separate excitation vibration of the tuning bar 1, thus making possible the sure level detection.
COPYRIGHT: (C)1979,JPO&Japio
JP53022048A 1978-03-01 1978-03-01 Powder level detection device Expired JPS5947246B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53022048A JPS5947246B2 (en) 1978-03-01 1978-03-01 Powder level detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53022048A JPS5947246B2 (en) 1978-03-01 1978-03-01 Powder level detection device

Publications (2)

Publication Number Publication Date
JPS54116269A true JPS54116269A (en) 1979-09-10
JPS5947246B2 JPS5947246B2 (en) 1984-11-17

Family

ID=12072032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53022048A Expired JPS5947246B2 (en) 1978-03-01 1978-03-01 Powder level detection device

Country Status (1)

Country Link
JP (1) JPS5947246B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007307536A (en) * 2006-05-19 2007-11-29 Koyo Engineering Co Ltd Coating material container for application

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52263U (en) * 1975-06-20 1977-01-05
JPS5947246A (en) * 1982-09-10 1984-03-16 Ube Ind Ltd Photo-curable composition

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52263B2 (en) * 1973-05-07 1977-01-06

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52263U (en) * 1975-06-20 1977-01-05
JPS5947246A (en) * 1982-09-10 1984-03-16 Ube Ind Ltd Photo-curable composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007307536A (en) * 2006-05-19 2007-11-29 Koyo Engineering Co Ltd Coating material container for application

Also Published As

Publication number Publication date
JPS5947246B2 (en) 1984-11-17

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