GB751156A - Improved ultrasonic liquid depth indicator - Google Patents

Improved ultrasonic liquid depth indicator

Info

Publication number
GB751156A
GB751156A GB12836/54A GB1283654A GB751156A GB 751156 A GB751156 A GB 751156A GB 12836/54 A GB12836/54 A GB 12836/54A GB 1283654 A GB1283654 A GB 1283654A GB 751156 A GB751156 A GB 751156A
Authority
GB
United Kingdom
Prior art keywords
holes
liquid
strip
tank
depth
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.)
Expired
Application number
GB12836/54A
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.)
Sperry Products Inc
Original Assignee
Sperry Products Inc
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 Sperry Products Inc filed Critical Sperry Products Inc
Publication of GB751156A publication Critical patent/GB751156A/en
Expired 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications

Abstract

751,156. Ultrasonic liquid depth indicator. SPERRY PRODUCTS, Inc. May 3, 1954 [June 29, 1953], No. 12836/54. Class 118(2) An ultrasonic device for indicating the depth of liquid in a tank, which has no moving parts and is independent of the acoustic velocity in the liquid, comprises a strip 11 of acoustic conducting material mounted in the top of a tank 10 by means of electrically insulating material 40 and extending downwards to a point below the minimum level to be indicated. An electroacoustic transducer 12 is attached on one side 15 of the strip near the top and consists of a piezo-electric crystal 32 mounted on a wedge 33 such that only surface waves are generated in the strip 11. A series of holes P1, P2 ... &c., are formed in the strip 11 transversely to the direction of propagation of the waves and at regular intervals along the length of the strip. Pulses of ultrasonic energy are fed to the crystal 32 (for example, sixty times a second) and echoes from the holes P1, P2 ... &c., are received and fed to the vertical deflector plates or intensifier grid of a cathode ray oscilloscope (C.R.O.) whose horizontal sweep is synchronized with the pulse transmission. This produces a series of "graduation marks" on the screen. If the tank contains liquid the surface waves are substantially damped below the point at which the strip 11 enters the liquid and reflections from the holes below this point will disappear and the depth of the liquid may be ascertained from the number of reflections on the C.R.O. The holes P1, P2 ... &c., are arranged in a step-like manner, the near holes being further below the surface 15 and the more distant holes progressively nearer the surface, so that the echo signals will be of substantially constant magnitude. The holes are preferably sealed to exclude the liquid.
GB12836/54A 1953-06-29 1954-05-03 Improved ultrasonic liquid depth indicator Expired GB751156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US751156XA 1953-06-29 1953-06-29

Publications (1)

Publication Number Publication Date
GB751156A true GB751156A (en) 1956-06-27

Family

ID=22123650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12836/54A Expired GB751156A (en) 1953-06-29 1954-05-03 Improved ultrasonic liquid depth indicator

Country Status (1)

Country Link
GB (1) GB751156A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163843A (en) * 1961-10-02 1964-12-29 North American Aviation Inc Liquid level indicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163843A (en) * 1961-10-02 1964-12-29 North American Aviation Inc Liquid level indicator

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