FR2377639A1 - Procede et dispositif de mesure de la duree d'impulsions - Google Patents

Procede et dispositif de mesure de la duree d'impulsions

Info

Publication number
FR2377639A1
FR2377639A1 FR7800825A FR7800825A FR2377639A1 FR 2377639 A1 FR2377639 A1 FR 2377639A1 FR 7800825 A FR7800825 A FR 7800825A FR 7800825 A FR7800825 A FR 7800825A FR 2377639 A1 FR2377639 A1 FR 2377639A1
Authority
FR
France
Prior art keywords
duration
pulses
measuring
unknown pulses
unknown
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Withdrawn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
FR7800825A
Other languages
English (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.)
AC Cossor Ltd
Original Assignee
AC Cossor 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 AC Cossor Ltd filed Critical AC Cossor Ltd
Publication of FR2377639A1 publication Critical patent/FR2377639A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F10/00—Apparatus for measuring unknown time intervals by electric means
    • G04F10/04—Apparatus for measuring unknown time intervals by electric means by counting pulses or half-cycles of an ac
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods

Abstract

L'invention concerne la mesure de la durée d'impulsions. Le dispositif de l'invention utilise deux oscillateurs à quartz 10, 12 ayant des fréquences très proches l'une de l'autre pour mesurer la durée d'impulsions inconnues, par le principe du vernier. Ceci permet de mesurer la durée des impulsions inconnues avec une excellente résolution, sans avoir à utiliser un oscillateur d'horloge de fréquence très élevée. Application au matériel de localisation de défauts dans les câbles.
FR7800825A 1977-01-18 1978-01-12 Procede et dispositif de mesure de la duree d'impulsions Withdrawn FR2377639A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1948/77A GB1558042A (en) 1977-01-18 1977-01-18 Measurement of pulse duration

Publications (1)

Publication Number Publication Date
FR2377639A1 true FR2377639A1 (fr) 1978-08-11

Family

ID=9730865

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7800825A Withdrawn FR2377639A1 (fr) 1977-01-18 1978-01-12 Procede et dispositif de mesure de la duree d'impulsions

Country Status (5)

Country Link
US (1) US4168467A (fr)
JP (1) JPS5390973A (fr)
DE (1) DE2802070A1 (fr)
FR (1) FR2377639A1 (fr)
GB (1) GB1558042A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0623827A2 (fr) 1993-04-06 1994-11-09 Fluke Corporation Réflectomètre temporel avec double base de temps et sans zone morte

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2914072C2 (de) * 1979-04-07 1985-06-20 Kernforschungsanlage Jülich GmbH, 5170 Jülich Schaltungsanordnung zur Ermittlung der Periodendauer und/oder davon abgeleiteten Größen eines im wesentlichen periodischen Signals
US4397031A (en) * 1980-12-04 1983-08-02 Weber Paul A Time delay computer
JPS60162737U (ja) * 1985-03-19 1985-10-29 三菱重工業株式会社 防振継手
FR2626376B1 (fr) * 1988-01-22 1990-07-13 Commissariat Energie Atomique Dispositif et procede de mesure d'une impulsion breve de rayonnement ou d'une impulsion breve electrique
US5521512A (en) * 1993-08-16 1996-05-28 The Penn State Research Foundation Time domain reflectometer using successively delayed test pulses and an interleaved sampling procedure
GB9322920D0 (en) * 1993-11-06 1993-12-22 Bicc Plc Device for testing an electrical line
JP2998650B2 (ja) * 1996-08-20 2000-01-11 日本電気株式会社 分周器用ｄｃ選別回路
JP6897315B2 (ja) * 2016-09-27 2021-06-30 セイコーエプソン株式会社 回路装置、物理量測定装置、電子機器及び移動体
JP6659057B1 (ja) * 2018-11-12 2020-03-04 Ｎｅｃプラットフォームズ株式会社 遅延時間検出回路、打刻情報生成装置および遅延時間検出方法
JP7170953B2 (ja) * 2020-09-30 2022-11-14 三菱電機株式会社 時間演算装置及び時間演算方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665410A (en) * 1951-03-15 1954-01-05 Hughes Tool Co Method and apparatus for automatically measuring time intervals
DE1230722B (de) * 1962-08-03 1966-12-15 Kernforschung Mit Beschraenkte Verfahren und Vorrichtung zum genauen Messen von beliebig aufeinanderfolgenden Kurzzeitbereichen wechselnder Laenge
FR2208118A1 (fr) * 1972-11-27 1974-06-21 Dassault Electronique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325750A (en) * 1963-12-23 1967-06-13 Gen Electric High resolution time interval measuring circuit employing a balanced crystal oscillator
US3611134A (en) * 1969-04-30 1971-10-05 Ibm Apparatus for automatically measuring time intervals using multiple interpolations of any fractional time interval

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665410A (en) * 1951-03-15 1954-01-05 Hughes Tool Co Method and apparatus for automatically measuring time intervals
DE1230722B (de) * 1962-08-03 1966-12-15 Kernforschung Mit Beschraenkte Verfahren und Vorrichtung zum genauen Messen von beliebig aufeinanderfolgenden Kurzzeitbereichen wechselnder Laenge
FR2208118A1 (fr) * 1972-11-27 1974-06-21 Dassault Electronique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/73 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0623827A2 (fr) 1993-04-06 1994-11-09 Fluke Corporation Réflectomètre temporel avec double base de temps et sans zone morte
EP0623827A3 (fr) * 1993-04-06 1995-08-02 Fluke Corp Réflectomètre temporel avec double base de temps et sans zone morte.

Also Published As

Publication number Publication date
JPS5390973A (en) 1978-08-10
US4168467A (en) 1979-09-18
DE2802070A1 (de) 1978-07-20
GB1558042A (en) 1979-12-19

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