FR2441151A1 - Vibration level detector for e.g. viscous materials - has forced oscillation resonant vibrator with synchronised electrical stimuli applied independently of external vibration - Google Patents

Vibration level detector for e.g. viscous materials - has forced oscillation resonant vibrator with synchronised electrical stimuli applied independently of external vibration

Info

Publication number
FR2441151A1
FR2441151A1 FR7831569A FR7831569A FR2441151A1 FR 2441151 A1 FR2441151 A1 FR 2441151A1 FR 7831569 A FR7831569 A FR 7831569A FR 7831569 A FR7831569 A FR 7831569A FR 2441151 A1 FR2441151 A1 FR 2441151A1
Authority
FR
France
Prior art keywords
vibration
mechanical
amplifier
level detector
synchronised
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
FR7831569A
Other languages
French (fr)
Other versions
FR2441151B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7831569A priority Critical patent/FR2441151A1/en
Publication of FR2441151A1 publication Critical patent/FR2441151A1/en
Application granted granted Critical
Publication of FR2441151B1 publication Critical patent/FR2441151B1/fr
Granted 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
    • G01F23/28—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 by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2966—Acoustic waves making use of acoustical resonance or standing waves
    • G01F23/2967—Acoustic waves making use of acoustical resonance or standing waves for discrete levels

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

Detector has a mechanical oscillation level sensor and a mechanical oscillation stimulation and electrical sensing system connected to a warning device via an amplifier. Unit has high operating reliability and employs forced stimulation of the mechanical oscillator which achieves its resonant frequency independent of external vibration sources. The mechanical vibration system is shock stimulated by a vibration generator and produces outputs to the level transducer and the amplifier input. The output of the amplifier is limited by a voltage amplitude limiting circuit which drives a differentiating stage input. The differentiating stage output provides an electrical input to the vibration generator, thus enabling the stimuli to be synchronised with the mechanical vibrations.
FR7831569A 1978-11-08 1978-11-08 Vibration level detector for e.g. viscous materials - has forced oscillation resonant vibrator with synchronised electrical stimuli applied independently of external vibration Granted FR2441151A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7831569A FR2441151A1 (en) 1978-11-08 1978-11-08 Vibration level detector for e.g. viscous materials - has forced oscillation resonant vibrator with synchronised electrical stimuli applied independently of external vibration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7831569A FR2441151A1 (en) 1978-11-08 1978-11-08 Vibration level detector for e.g. viscous materials - has forced oscillation resonant vibrator with synchronised electrical stimuli applied independently of external vibration

Publications (2)

Publication Number Publication Date
FR2441151A1 true FR2441151A1 (en) 1980-06-06
FR2441151B1 FR2441151B1 (en) 1981-07-03

Family

ID=9214606

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7831569A Granted FR2441151A1 (en) 1978-11-08 1978-11-08 Vibration level detector for e.g. viscous materials - has forced oscillation resonant vibrator with synchronised electrical stimuli applied independently of external vibration

Country Status (1)

Country Link
FR (1) FR2441151A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1545598A (en) * 1967-05-26 1968-11-15 Monsieur Le Ministre Des Armee Vibrating blade level switch for liquids
US3585622A (en) * 1968-09-04 1971-06-15 Gen Motors Corp Vibratory liquid level detector
DE2632297A1 (en) * 1975-07-21 1977-01-27 Sanko Air Plant LEVEL INDICATOR
US4008613A (en) * 1975-10-03 1977-02-22 Ludlow Industries, Inc. Vibratory bin level indicators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1545598A (en) * 1967-05-26 1968-11-15 Monsieur Le Ministre Des Armee Vibrating blade level switch for liquids
US3585622A (en) * 1968-09-04 1971-06-15 Gen Motors Corp Vibratory liquid level detector
DE2632297A1 (en) * 1975-07-21 1977-01-27 Sanko Air Plant LEVEL INDICATOR
US4008613A (en) * 1975-10-03 1977-02-22 Ludlow Industries, Inc. Vibratory bin level indicators

Also Published As

Publication number Publication date
FR2441151B1 (en) 1981-07-03

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Legal Events

Date Code Title Description
ST Notification of lapse