GB1175553A - Depth Sensitive Transducer - Google Patents

Depth Sensitive Transducer

Info

Publication number
GB1175553A
GB1175553A GB2353/67A GB235367A GB1175553A GB 1175553 A GB1175553 A GB 1175553A GB 2353/67 A GB2353/67 A GB 2353/67A GB 235367 A GB235367 A GB 235367A GB 1175553 A GB1175553 A GB 1175553A
Authority
GB
United Kingdom
Prior art keywords
transducer
pressure
bridge
coils
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
GB2353/67A
Inventor
Kenneth W Mcload
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.)
Schlumberger Technology Corp
Original Assignee
Schlumberger Technology Corp
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 Schlumberger Technology Corp filed Critical Schlumberger Technology Corp
Publication of GB1175553A publication Critical patent/GB1175553A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • G01V1/3817—Positioning of seismic devices
    • G01V1/3835—Positioning of seismic devices measuring position, e.g. by GPS or acoustically
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/02—Arrangements for preventing, or for compensating for, effects of inclination or acceleration of the measuring device; Zero-setting means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/007—Transmitting or indicating the displacement of flexible diaphragms using variations in inductance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/10—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in inductance, i.e. electric circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • G01V1/186—Hydrophones

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Oceanography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

1,175,553. Seismic prospecting; microphones. SCHLUMBERGER TECHNOLOGY CORP. 17 Jan., 1967, No. 2353/67. Headings H4D and H4J. [Also in Division G1] A transducer for measuring hydrostatic pressure variations and acoustical pressure waves, produced, e.g. by underwater explosion and reflected from earth formations on the water bed, comprises a sealed housing 14, (Fig. 1) of which two opposite walls are formed by diaphragms 16, 18 carrying iron or steel armatures 20, 22. U-shaped magnetic polepieces 24, 26 fixed in the housing are provided with coils 34, 36 connected in series in one arm of a bridge (Fig. 2) in parallel with a variable capacitor 60. Initially the capacitor and a resistor in arm 50 are varied to balance the bridge at a known pressure. Changes in the inductance of the coils due to movement in opposite directions of armatures 20, 22 modulates the bridge output at a frequency of the order of 1500 c/s for acoustic pressure waves and at a frequency of less than 1 c/s. for hydrostatic pressure changes occurring as a result of variations in the depth of the transducer. The bridge output is demodulated to remove the carrier frequency then fed through a high pass filter, which selects signals due to the acoustic waves which are amplified and re. corded, and also through a low pass filter, which records depth signals. In operation a plurality of transducers are towed behind a boat, the hydrostatic pressure measurements enabling the operator to keep the transducers at a required depth. The transducer construction automatically cancels signals produced by displacement of the transducer as a whole in the liquid medium. In modifications permanent magnets may be attached to the diaphragms, movement of the magnets inducing currents in coils 34, 36: or one plate of a capacitor may be mounted on each diaphragm with a second plate fixed in the housing; of the wiper arm of a potentiometer may be connected to the diaphragm to vary the impedance of the potentiometer dependent on pressure.
GB2353/67A 1967-04-20 1967-01-17 Depth Sensitive Transducer Expired GB1175553A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR103578A FR1527190A (en) 1967-04-20 1967-04-20 Pressure sensitive device

Publications (1)

Publication Number Publication Date
GB1175553A true GB1175553A (en) 1969-12-23

Family

ID=8629319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2353/67A Expired GB1175553A (en) 1967-04-20 1967-01-17 Depth Sensitive Transducer

Country Status (2)

Country Link
FR (1) FR1527190A (en)
GB (1) GB1175553A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588968A1 (en) * 1985-10-18 1987-04-24 Realisa Geosciences Et Device for detecting seismic waves and single-stage offshore seismic prospecting installation including such a device
GB2227317A (en) * 1988-12-05 1990-07-25 Plessey Australia Infrasonic hydrophone signal correction arrangement
CZ308267B6 (en) * 2019-02-13 2020-04-01 České vysoké učení technické v Praze Miniature sound pressure sensor in liquids and gases

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588968A1 (en) * 1985-10-18 1987-04-24 Realisa Geosciences Et Device for detecting seismic waves and single-stage offshore seismic prospecting installation including such a device
GB2227317A (en) * 1988-12-05 1990-07-25 Plessey Australia Infrasonic hydrophone signal correction arrangement
CZ308267B6 (en) * 2019-02-13 2020-04-01 České vysoké učení technické v Praze Miniature sound pressure sensor in liquids and gases

Also Published As

Publication number Publication date
FR1527190A (en) 1968-05-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees