GB2119605A - Apparatus for transmitting signals - Google Patents

Apparatus for transmitting signals Download PDF

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Publication number
GB2119605A
GB2119605A GB08311772A GB8311772A GB2119605A GB 2119605 A GB2119605 A GB 2119605A GB 08311772 A GB08311772 A GB 08311772A GB 8311772 A GB8311772 A GB 8311772A GB 2119605 A GB2119605 A GB 2119605A
Authority
GB
United Kingdom
Prior art keywords
transmitting
signals
warning means
centre
lighting units
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.)
Granted
Application number
GB08311772A
Other versions
GB8311772D0 (en
GB2119605B (en
Inventor
Manfred Moews
Klaus-Peter Schott
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.)
MUCKENHAUPT GmbH
Original Assignee
MUCKENHAUPT 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 MUCKENHAUPT GmbH filed Critical MUCKENHAUPT GmbH
Publication of GB8311772D0 publication Critical patent/GB8311772D0/en
Publication of GB2119605A publication Critical patent/GB2119605A/en
Application granted granted Critical
Publication of GB2119605B publication Critical patent/GB2119605B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
    • H02J13/00009—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission using pulsed signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/76—Wired systems
    • H04H20/84—Wired systems combined with power distribution network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5466—Systems for power line communications using three phases conductors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • H04B2203/5487—Systems for power line communications using coupling circuits cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Mining & Mineral Resources (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

Apparatus for transmitting signals, particularly in underground mines, using existing networks of security current cables (4) of the coaxial kind, transmits high frequency signals, both from a transmitting centre (2) to various receiving stations (10) located at existing lighting units (8), and from any receiving station (10) to other receiving stations (10) and back to the transmitting centre (2), to operate optical and acoustic warning means (13, 14). The transmitters inductively couple high frequency signals onto the cables (4), the signals being superimposed on the AC power in the cables. <IMAGE>

Description

SPECIFICATION Apparatus for transmitting signals The invention relates to apparatus for transmitting signals, particularly in underground mines, comprising at least one transmitting centre and a plurality of receiving stations.
Apparatus has been previously proposed wherein signals are transmitted through an existing AC lighting installation network. Thus German published specification 2428173 discloses a method and apparatus for transmitting signals, where signals are generated and transmitted by briefly interrupting the flow of current or otherwise manipulating normal alternating current in a lighting network. In many applications this method of transmitting signals is unacceptable for use underground for safety reasons, since it involves interrupting relatively strong currents.In addition it is prone to trouble and may easily lead to misunderstandings in the transmission of signals According to the invention there is provided apparatus for transmitting signals, particularly in underground mines, comprising at least one transmitting centre and a plurality of receiving stations coupled to an existing AC lighting installation network of security current cables having a protective conductive screen, whereby high frequency signals can be inductively superimposed on alternating current in the security current cables, and transmitted through the lighting installation network from the transmitting centre to the receiving stations.
The apparatus can transmit signals which are not liable to be affected by external influences, the transmission of the signals taking into account the high safety requirements in underground mines where there is a danger of fire damp. Cables already present in underground mines to provide lighting can be used, and it is therefore unnecessary to lay a new signalling line. Since the security cables have a construction similar to a coaxial cable, they are surprisingly well suited to the transmission of high frequency signals. These signals are very unlikely to suffer from interference. The inductive feeding-in of a weak high frequency signal is acceptable from the point of view of safety, in contrast with the abovementioned manipulations of the alternating current in the lighting network, where strong currents have to be switched.
It is particularly advantageous for the high frequency signals to trigger both optical and acoustic warning means since even if a miner cannot see the optical warning means because of coal dust, the acoustic means will alert him to danger. Conversely if he fails to hear the acoustic warning, because of the loud noise of machinery, the optical indicator will warn him.
It is advantageous for the optical and acoustic warning means to be arranged on the casing of existing lighting units. It is easy to mount them, and the warning means have a defined location.
To enable the weak high frequency signals to reach any point in a mine, an amplifier can be arranged in the casing of each of the lighting units in order to trigger the warning means.
To save any other miner who may wish to draw attention to dangers within his field of vision from first having to run to the transmitting centre, which may for example be at the hoist control of a cable driven trolley conveyor, in order to set the warning means in operation, a signalling mec ns is preferably disposed in each casing of the lighting units and can generate signals in addition to the transmitting centre.
If, for example, there is an obstacle along the track which threatens to collide with the trolley conveyor and which the man at the hoist control cannot see, then it is advantageous for the transmitting centre also to have a receiving station with optical and acoustic warning means associated with it so that a miner seeing a likelihood of collision may use the signalling means in the casing of the lighting units to draw the danger to the attention of the man at the hoist control, so that he can rapidly stop the conveyor.
The invention is diagrammatically illustrated by way of example in the accompanying drawings, in which: Figure 1 is a schematic layout of apparatus according to the invention; Figure 2 is a circuit diagram of an amplifier portion of apparatus according to the invention; and Figure 3 shows the construction of a security current cable used in apparatus according to the invention.
Referring to the drawings, at a hoist control 1, for example of a cable driven trolley conveyor (not shown), there is a transmitting centre 2 which, when actuated by a signal transmitter 3, inductively feeds high frequency signals into 3 security current cable 4 of the kind commonly used in mining. The cable 4 is constructed with three current-carrying insulated leads 5 embedded in a slightly conductive rubber material 6. A protective conducting screen 7 is provided wound around the leads 5 and the rubber material 6. If the insulation of one of the leads 5 is damaged by externai action, then a circuit will be closed through the slightly conductive rubber material 6 and the protective conductor network 7 and will rapidly disconnect the strong current.The construction of the security current cable 4 with the current-carrying leads 5, the rubber material 6 acting as a dielectric and the protective conductor network 7 acting as a screen, makes it highly suitable for use with high frequency signals. The cable 4 normally supplies lighting units 8 at intervals of approximately 30 metres. A receiving station 10 for the high frequency signals is mounted in a casing 9 of each of the lighting units 8. Each receiving station 10 chiefly comprises an electronic evaluating means 11 supplying an amplifier 12, which can trigger optical and acoustic warning means 13 and 14 disposed on the outside of the casing 9.In addition a manually actuatable signalling means 1 5 is mounted in the casing 9. enabling the warning means 1 3 and 14 throughout the current network to be actuated from the casing 9 of any of the lighting units 8. For this reason a receiving station 10 with optical and acoustic warning means 13 and 14 is also associated with the transmitting centre 3 at the hoist control 1.
Communication is ensured in this way throughout the travelling range of the trolley conveyor. When the cable driven trolley conveyor is started up, miners working in its vicinity have to be warned. For this purpose a signal is triggered by a time contact in the control circuit of the cable way drive before the brakes are released and the signal is then fed into the circuit for the lighting units 8. Any miner can draw attention to any dangers along the track by using the manually actuatable signalling means 15 on one of the lighting units 8.

Claims (7)

1. Apparatus for transmitting signals, particularly in underground mines, comprising at least one transmitting centre and a plurality of receiving stations coupled to an existing AC lighting installation network of security current cables having a protective conductive screen, whereby high frequency signals can be inductively superimposed on alternating current in the security current cables, and transmitting through the lighting installation network from the transmitting centre to the receiving stations.
2. Apparatus according to claim 1, including optical and acoustic warning means to be triggered by the frequency signals.
3. Apparatus according to claim 2, in which the optical and acoustic warning means are disposed on casings of existing lighting units.
4. Apparatus according to claim 2 or claim 3, including amplifiers to trigger the warning means and disposed in the casings of existing lighting units.
5. Apparatus according to any one of claims 2 to 4, including signalling means disposed in casings of existing lighting units and to generate signals in addition to those generated at the transmitting centre.
6. Apparatus according to claim 5, including a receiving station with optical and acoustic warning means provided at the transmitting centre.
7. Apparatus for transmitting signals substantially as hereinbefore described and illustrated with reference to the accompanying drawing.
GB08311772A 1982-04-30 1983-04-29 Apparatus for transmitting signals Expired GB2119605B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823216091 DE3216091A1 (en) 1982-04-30 1982-04-30 DEVICE FOR TRANSMITTING SIGNALS

Publications (3)

Publication Number Publication Date
GB8311772D0 GB8311772D0 (en) 1983-06-02
GB2119605A true GB2119605A (en) 1983-11-16
GB2119605B GB2119605B (en) 1986-01-22

Family

ID=6162321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08311772A Expired GB2119605B (en) 1982-04-30 1983-04-29 Apparatus for transmitting signals

Country Status (3)

Country Link
BE (1) BE896497A (en)
DE (1) DE3216091A1 (en)
GB (1) GB2119605B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309407A1 (en) * 1987-09-22 1989-03-29 Transec Financiere S.A. Monitoring device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU735674B2 (en) * 1997-05-28 2001-07-12 Heponi Pty Limited Underground mine communications

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB631729A (en) * 1945-05-18 1949-11-09 Union D Electricite Improvements in installations including remote control transmissions, for the selective protection of electric networks
GB709118A (en) * 1950-06-14 1954-05-19 Motor Columbus Ag Fur Elek Sch Improvements in electric cables
GB1403251A (en) * 1972-07-24 1975-09-10 Century Int Co Communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB631729A (en) * 1945-05-18 1949-11-09 Union D Electricite Improvements in installations including remote control transmissions, for the selective protection of electric networks
GB709118A (en) * 1950-06-14 1954-05-19 Motor Columbus Ag Fur Elek Sch Improvements in electric cables
GB1403251A (en) * 1972-07-24 1975-09-10 Century Int Co Communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309407A1 (en) * 1987-09-22 1989-03-29 Transec Financiere S.A. Monitoring device
WO1989003133A1 (en) * 1987-09-22 1989-04-06 Transec Financiere S.A. Monitoring device

Also Published As

Publication number Publication date
GB8311772D0 (en) 1983-06-02
GB2119605B (en) 1986-01-22
BE896497A (en) 1983-08-16
DE3216091A1 (en) 1983-11-03

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PCNP Patent ceased through non-payment of renewal fee