FR2386057A1 - Piston scraper localisation system in pipeline - uses transceiver outside pipe and transceiver in pipe operating on 20 Hz frequency - Google Patents

Piston scraper localisation system in pipeline - uses transceiver outside pipe and transceiver in pipe operating on 20 Hz frequency

Info

Publication number
FR2386057A1
FR2386057A1 FR7709772A FR7709772A FR2386057A1 FR 2386057 A1 FR2386057 A1 FR 2386057A1 FR 7709772 A FR7709772 A FR 7709772A FR 7709772 A FR7709772 A FR 7709772A FR 2386057 A1 FR2386057 A1 FR 2386057A1
Authority
FR
France
Prior art keywords
pipeline
transmitter
circuit
transceiver
signal
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.)
Withdrawn
Application number
FR7709772A
Other languages
French (fr)
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.)
INTERSUB DEV SA
Original Assignee
INTERSUB DEV SA
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 INTERSUB DEV SA filed Critical INTERSUB DEV SA
Priority to FR7709772A priority Critical patent/FR2386057A1/en
Publication of FR2386057A1 publication Critical patent/FR2386057A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/005—Investigating fluid-tightness of structures using pigs or moles

Abstract

The pipeline cleaning piston locating system has a first circuit(3) which is fitted to the piston(2) in the pipeline. This first circuit(3) includes an alternating signal receiver and a reference alternating signal transmitter. The signal frequencies being less than 100Hertz, pref. less than 20 Hertz. The transmitter circuit is normally switched off, but is actuated by the incoming signal to the receiver. Thus the transmitter circuit transmits when the receiver circuits receives an exterior signal. A second circuit(4) exterior to the pipeline(1) includes a transmitter which emits a signal in the direction of the pipeline. This second circuit has also a receiver for receiving the reference signal emitted by the first circuits transmitter. The first circuits transmitter includes a emission coil coaxial with the pipeline. The first circuits transmitter and the second circuits receiver each include a coil having parallel axes.
FR7709772A 1977-03-31 1977-03-31 Piston scraper localisation system in pipeline - uses transceiver outside pipe and transceiver in pipe operating on 20 Hz frequency Withdrawn FR2386057A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7709772A FR2386057A1 (en) 1977-03-31 1977-03-31 Piston scraper localisation system in pipeline - uses transceiver outside pipe and transceiver in pipe operating on 20 Hz frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7709772A FR2386057A1 (en) 1977-03-31 1977-03-31 Piston scraper localisation system in pipeline - uses transceiver outside pipe and transceiver in pipe operating on 20 Hz frequency

Publications (1)

Publication Number Publication Date
FR2386057A1 true FR2386057A1 (en) 1978-10-27

Family

ID=9188844

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7709772A Withdrawn FR2386057A1 (en) 1977-03-31 1977-03-31 Piston scraper localisation system in pipeline - uses transceiver outside pipe and transceiver in pipe operating on 20 Hz frequency

Country Status (1)

Country Link
FR (1) FR2386057A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569860A1 (en) * 1984-08-28 1986-03-07 Electromatic Pty Ltd INDUCTIVE LOOP DETECTOR AND METHOD OF USE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569860A1 (en) * 1984-08-28 1986-03-07 Electromatic Pty Ltd INDUCTIVE LOOP DETECTOR AND METHOD OF USE

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Legal Events

Date Code Title Description
ST Notification of lapse