GB2102252B - Audio frequency measuring apparatus - Google Patents

Audio frequency measuring apparatus

Info

Publication number
GB2102252B
GB2102252B GB08221097A GB8221097A GB2102252B GB 2102252 B GB2102252 B GB 2102252B GB 08221097 A GB08221097 A GB 08221097A GB 8221097 A GB8221097 A GB 8221097A GB 2102252 B GB2102252 B GB 2102252B
Authority
GB
United Kingdom
Prior art keywords
measuring apparatus
audio frequency
frequency measuring
audio
measuring
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
GB08221097A
Other languages
English (en)
Other versions
GB2102252A (en
Inventor
Klaus Detering
Fritz Schuermann
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.)
Bergwerksverband GmbH
Original Assignee
Bergwerksverband GmbH
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 Bergwerksverband GmbH filed Critical Bergwerksverband GmbH
Publication of GB2102252A publication Critical patent/GB2102252A/en
Application granted granted Critical
Publication of GB2102252B publication Critical patent/GB2102252B/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/06—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division
    • G08C15/10—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path successively, i.e. using time division the signals being represented by frequencies or phase of current or voltage in transmission link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of AC

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
GB08221097A 1981-07-22 1982-07-21 Audio frequency measuring apparatus Expired GB2102252B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813128942 DE3128942A1 (de) 1981-07-22 1981-07-22 Vielstellenmess- und steuerungsanlage

Publications (2)

Publication Number Publication Date
GB2102252A GB2102252A (en) 1983-01-26
GB2102252B true GB2102252B (en) 1985-09-11

Family

ID=6137470

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08221097A Expired GB2102252B (en) 1981-07-22 1982-07-21 Audio frequency measuring apparatus

Country Status (3)

Country Link
DE (1) DE3128942A1 (enExample)
FR (1) FR2510283B1 (enExample)
GB (1) GB2102252B (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416575A1 (de) * 1984-05-04 1985-11-07 Ruhrkohle Ag, 4300 Essen Vorrichtung fuer den untertagebergbau zur pruefung und zum abgleich von messwertgebern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1251682B (de) * 1967-10-05 Siemens Aktiengesellschaft Berlin und München Erlangen Einrichtung zur emkanaligen Übertragung mehrerer Meßwerte
GB846895A (en) * 1956-10-17 1960-08-31 Sargrove Electronics Ltd An electronic indicator system more particularly for use in mines
DE1908652A1 (de) * 1969-02-21 1970-09-03 Licentia Gmbh System zur automatischen UEberwachung wenigstens einer Koerperfunktion mindestens eines Patienten
FR2064597A5 (enExample) * 1969-10-02 1971-07-23 Garros Pierre
BE790743A (fr) * 1971-12-03 1973-02-15 Danfoss As Montage multiplex

Also Published As

Publication number Publication date
DE3128942A1 (de) 1983-05-05
GB2102252A (en) 1983-01-26
FR2510283A1 (fr) 1983-01-28
FR2510283B1 (fr) 1986-05-16
DE3128942C2 (enExample) 1988-10-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee