Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent
1992-10-21
1993-12-07
Eldred, J. Woodrow
Communications: electrical
Wellbore telemetering or control
Using a specific transmission medium
3408546, 3408548, 175 40, G01V 100
Patent
active
052686833
ABSTRACT:
A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness in a natural resource mining system such as a longwall or continuous mine system. The method utilizes a plurality of sensors connected to low magnetic moment transmitters, e.g. 0.1 ATM.sup.2, or high magnetic moment transmitters, e.g. 2.5 ATM.sup.2, that transmit collected data during multiple short burst transmission periods. Prior to transmission, the data is converted to a digital word format. An algorithm in the transmitter microcomputer ensures that random time intervals exist between data transmission bursts thus preventing a data transmission clash at the central receiver. A microcomputer algorithm in the central receiver protects against data contention caused by simultaneous transmission from several sensors. The data is transmitted to the central receiver either through a natural waveguide pathway or through a utility conductor that is magnetically coupled to the transmitter and central receiver by properly oriented electrically short magnetic dipole antennas. The method can be used, for example, to automatically control the positioning of a plurality of longwall roof supports or to transmit data from a longwall drillhead, along the drill rod, to the central receiver. Data can be communicated between a remote location and a surface area by utilizing a system of repeaters inductively coupled to a utility conductor. Use of the repeater system permits operation of mining machines from a surface computer.
REFERENCES:
patent: Re32563 (1987-12-01), Stolarczyk
patent: 4072349 (1978-02-01), Hartley
patent: 4348672 (1982-09-01), Givler
patent: 4525715 (1985-06-01), Smith
patent: 4725837 (1988-02-01), Rubin
patent: 4742305 (1988-05-01), Stolarczyk
patent: 4753484 (1988-06-01), Stolarczyk
patent: 4839644 (1989-06-01), Safinya
"Control and Monitoring via Medium Frequency Techniques and Existing Mine Conductors", Harry Dobroski, IEEE Transactions, Jul./Aug. 1985.
"Long and Short Range Multiple Point Wireless Sensor Data Transmission System", L. Stolarczyk Nov. 7, 1986.
"Antenna Theory", Robert E. Collins, Francis J. Zucker Inter-University Electronics Series vol. 7.
"Time-Harmonic Electromagnetic Fields", Roger F. Harrington, for McGraw-Hill, 1961.
Eldred J. Woodrow
Schatzel Thomas E.
Stolar, Inc.
LandOfFree
Method of transmitting data from a drillhead does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of transmitting data from a drillhead, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of transmitting data from a drillhead will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2018663